Edit

[EDIT] FILE: cmap.zip

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strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MessageStream = void 0;
const stream_1 = require("stream");
const error_1 = require("../error");
const utils_1 = require("../utils");
const commands_1 = require("./commands");
const compression_1 = require("./wire_protocol/compression");
const constants_1 = require("./wire_protocol/constants");
const MESSAGE_HEADER_SIZE = 16;
const COMPRESSION_DETAILS_SIZE = 9; // originalOpcode + uncompressedSize, compressorID
const kDefaultMaxBsonMessageSize = 1024 * 1024 * 16 * 4;
/** @internal */
const kBuffer = Symbol('buffer');
/**
 * A duplex stream that is capable of reading and writing raw wire protocol messages, with
 * support for optional compression
 * @internal
 */
class MessageStream extends stream_1.Duplex {
    constructor(options = {}) {
        super(options);
        /** @internal */
        this.isMonitoringConnection = false;
        this.maxBsonMessageSize = options.maxBsonMessageSize || kDefaultMaxBsonMessageSize;
        this[kBuffer] = new utils_1.BufferPool();
    }
    get buffer() {
        return this[kBuffer];
    }
    _write(chunk, _, callback) {
        this[kBuffer].append(chunk);
        processIncomingData(this, callback);
    }
    _read( /* size */) {
        // NOTE: This implementation is empty because we explicitly push data to be read
        //       when `writeMessage` is called.
        return;
    }
    writeCommand(command, operationDescription) {
        // TODO: agreed compressor should live in `StreamDescription`
        const compressorName = operationDescription && operationDescription.agreedCompressor
            ? operationDescription.agreedCompressor
            : 'none';
        if (compressorName === 'none' || !canCompress(command)) {
            const data = command.toBin();
            this.push(Array.isArray(data) ? Buffer.concat(data) : data);
            return;
        }
        // otherwise, compress the message
        const concatenatedOriginalCommandBuffer = Buffer.concat(command.toBin());
        const messageToBeCompressed = concatenatedOriginalCommandBuffer.slice(MESSAGE_HEADER_SIZE);
        // Extract information needed for OP_COMPRESSED from the uncompressed message
        const originalCommandOpCode = concatenatedOriginalCommandBuffer.readInt32LE(12);
        // Compress the message body
        (0, compression_1.compress)({ options: operationDescription }, messageToBeCompressed, (err, compressedMessage) => {
            if (err || !compressedMessage) {
                operationDescription.cb(err);
                return;
            }
            // Create the msgHeader of OP_COMPRESSED
            const msgHeader = Buffer.alloc(MESSAGE_HEADER_SIZE);
            msgHeader.writeInt32LE(MESSAGE_HEADER_SIZE + COMPRESSION_DETAILS_SIZE + compressedMessage.length, 0); // messageLength
            msgHeader.writeInt32LE(command.requestId, 4); // requestID
            msgHeader.writeInt32LE(0, 8); // responseTo (zero)
            msgHeader.writeInt32LE(constants_1.OP_COMPRESSED, 12); // opCode
            // Create the compression details of OP_COMPRESSED
            const compressionDetails = Buffer.alloc(COMPRESSION_DETAILS_SIZE);
            compressionDetails.writeInt32LE(originalCommandOpCode, 0); // originalOpcode
            compressionDetails.writeInt32LE(messageToBeCompressed.length, 4); // Size of the uncompressed compressedMessage, excluding the MsgHeader
            compressionDetails.writeUInt8(compression_1.Compressor[compressorName], 8); // compressorID
            this.push(Buffer.concat([msgHeader, compressionDetails, compressedMessage]));
        });
    }
}
exports.MessageStream = MessageStream;
// Return whether a command contains an uncompressible command term
// Will return true if command contains no uncompressible command terms
function canCompress(command) {
    const commandDoc = command instanceof commands_1.Msg ? command.command : command.query;
    const commandName = Object.keys(commandDoc)[0];
    return !compression_1.uncompressibleCommands.has(commandName);
}
function processIncomingData(stream, callback) {
    const buffer = stream[kBuffer];
    const sizeOfMessage = buffer.getInt32();
    if (sizeOfMessage == null) {
        return callback();
    }
    if (sizeOfMessage < 0) {
        return callback(new error_1.MongoParseError(`Invalid message size: ${sizeOfMessage}`));
    }
    if (sizeOfMessage > stream.maxBsonMessageSize) {
        return callback(new error_1.MongoParseError(`Invalid message size: ${sizeOfMessage}, max allowed: ${stream.maxBsonMessageSize}`));
    }
    if (sizeOfMessage > buffer.length) {
        return callback();
    }
    const message = buffer.read(sizeOfMessage);
    const messageHeader = {
        length: message.readInt32LE(0),
        requestId: message.readInt32LE(4),
        responseTo: message.readInt32LE(8),
        opCode: message.readInt32LE(12)
    };
    const monitorHasAnotherHello = () => {
        if (stream.isMonitoringConnection) {
            // Can we read the next message size?
            const sizeOfMessage = buffer.getInt32();
            if (sizeOfMessage != null && sizeOfMessage <= buffer.length) {
                return true;
            }
        }
        return false;
    };
    let ResponseType = messageHeader.opCode === constants_1.OP_MSG ? commands_1.BinMsg : commands_1.Response;
    if (messageHeader.opCode !== constants_1.OP_COMPRESSED) {
        const messageBody = message.subarray(MESSAGE_HEADER_SIZE);
        // If we are a monitoring connection message stream and
        // there is more in the buffer that can be read, skip processing since we
        // want the last hello command response that is in the buffer.
        if (monitorHasAnotherHello()) {
            return processIncomingData(stream, callback);
        }
        stream.emit('message', new ResponseType(message, messageHeader, messageBody));
        if (buffer.length >= 4) {
            return processIncomingData(stream, callback);
        }
        return callback();
    }
    messageHeader.fromCompressed = true;
    messageHeader.opCode = message.readInt32LE(MESSAGE_HEADER_SIZE);
    messageHeader.length = message.readInt32LE(MESSAGE_HEADER_SIZE + 4);
    const compressorID = message[MESSAGE_HEADER_SIZE + 8];
    const compressedBuffer = message.slice(MESSAGE_HEADER_SIZE + 9);
    // recalculate based on wrapped opcode
    ResponseType = messageHeader.opCode === constants_1.OP_MSG ? commands_1.BinMsg : commands_1.Response;
    return (0, compression_1.decompress)(compressorID, compressedBuffer, (err, messageBody) => {
        if (err || !messageBody) {
            return callback(err);
        }
        if (messageBody.length !== messageHeader.length) {
            return callback(new error_1.MongoDecompressionError('Message body and message header must be the same length'));
        }
        // If we are a monitoring connection message stream and
        // there is more in the buffer that can be read, skip processing since we
        // want the last hello command response that is in the buffer.
        if (monitorHasAnotherHello()) {
            return processIncomingData(stream, callback);
        }
        stream.emit('message', new ResponseType(message, messageHeader, messageBody));
        if (buffer.length >= 4) {
            return processIncomingData(stream, callback);
        }
        return callback();
    });
}
//# sourceMappingURL=message_stream.js.mapPK�����O[�����������wire_protocol/constants.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.OP_MSG = exports.OP_COMPRESSED = exports.OP_DELETE = exports.OP_QUERY = exports.OP_INSERT = exports.OP_UPDATE = exports.OP_REPLY = exports.MAX_SUPPORTED_WIRE_VERSION = exports.MIN_SUPPORTED_WIRE_VERSION = exports.MAX_SUPPORTED_SERVER_VERSION = exports.MIN_SUPPORTED_SERVER_VERSION = void 0;
exports.MIN_SUPPORTED_SERVER_VERSION = '3.6';
exports.MAX_SUPPORTED_SERVER_VERSION = '6.0';
exports.MIN_SUPPORTED_WIRE_VERSION = 6;
exports.MAX_SUPPORTED_WIRE_VERSION = 17;
exports.OP_REPLY = 1;
exports.OP_UPDATE = 2001;
exports.OP_INSERT = 2002;
exports.OP_QUERY = 2004;
exports.OP_DELETE = 2006;
exports.OP_COMPRESSED = 2012;
exports.OP_MSG = 2013;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.isSharded = exports.applyCommonQueryOptions = exports.getReadPreference = void 0;
const error_1 = require("../../error");
const read_preference_1 = require("../../read_preference");
const common_1 = require("../../sdam/common");
const topology_description_1 = require("../../sdam/topology_description");
function getReadPreference(cmd, options) {
    // Default to command version of the readPreference
    let readPreference = cmd.readPreference || read_preference_1.ReadPreference.primary;
    // If we have an option readPreference override the command one
    if (options === null || options === void 0 ? void 0 : options.readPreference) {
        readPreference = options.readPreference;
    }
    if (typeof readPreference === 'string') {
        readPreference = read_preference_1.ReadPreference.fromString(readPreference);
    }
    if (!(readPreference instanceof read_preference_1.ReadPreference)) {
        throw new error_1.MongoInvalidArgumentError('Option "readPreference" must be a ReadPreference instance');
    }
    return readPreference;
}
exports.getReadPreference = getReadPreference;
function applyCommonQueryOptions(queryOptions, options) {
    Object.assign(queryOptions, {
        raw: typeof options.raw === 'boolean' ? options.raw : false,
        promoteLongs: typeof options.promoteLongs === 'boolean' ? options.promoteLongs : true,
        promoteValues: typeof options.promoteValues === 'boolean' ? options.promoteValues : true,
        promoteBuffers: typeof options.promoteBuffers === 'boolean' ? options.promoteBuffers : false,
        bsonRegExp: typeof options.bsonRegExp === 'boolean' ? options.bsonRegExp : false,
        enableUtf8Validation: typeof options.enableUtf8Validation === 'boolean' ? options.enableUtf8Validation : true
    });
    if (options.session) {
        queryOptions.session = options.session;
    }
    return queryOptions;
}
exports.applyCommonQueryOptions = applyCommonQueryOptions;
function isSharded(topologyOrServer) {
    if (topologyOrServer == null) {
        return false;
    }
    if (topologyOrServer.description && topologyOrServer.description.type === common_1.ServerType.Mongos) {
        return true;
    }
    // NOTE: This is incredibly inefficient, and should be removed once command construction
    //       happens based on `Server` not `Topology`.
    if (topologyOrServer.description && topologyOrServer.description instanceof topology_description_1.TopologyDescription) {
        const servers = Array.from(topologyOrServer.description.servers.values());
        return servers.some((server) => server.type === common_1.ServerType.Mongos);
    }
    return false;
}
exports.isSharded = isSharded;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.decompress = exports.compress = exports.uncompressibleCommands = exports.Compressor = void 0;
const zlib = require("zlib");
const constants_1 = require("../../constants");
const deps_1 = require("../../deps");
const error_1 = require("../../error");
/** @public */
exports.Compressor = Object.freeze({
    none: 0,
    snappy: 1,
    zlib: 2,
    zstd: 3
});
exports.uncompressibleCommands = new Set([
    constants_1.LEGACY_HELLO_COMMAND,
    'saslStart',
    'saslContinue',
    'getnonce',
    'authenticate',
    'createUser',
    'updateUser',
    'copydbSaslStart',
    'copydbgetnonce',
    'copydb'
]);
const MAX_COMPRESSOR_ID = 3;
const ZSTD_COMPRESSION_LEVEL = 3;
// Facilitate compressing a message using an agreed compressor
function compress(self, dataToBeCompressed, callback) {
    const zlibOptions = {};
    switch (self.options.agreedCompressor) {
        case 'snappy': {
            if ('kModuleError' in deps_1.Snappy) {
                return callback(deps_1.Snappy['kModuleError']);
            }
            if (deps_1.Snappy[deps_1.PKG_VERSION].major <= 6) {
                deps_1.Snappy.compress(dataToBeCompressed, callback);
            }
            else {
                deps_1.Snappy.compress(dataToBeCompressed).then(buffer => callback(undefined, buffer), error => callback(error));
            }
            break;
        }
        case 'zlib':
            // Determine zlibCompressionLevel
            if (self.options.zlibCompressionLevel) {
                zlibOptions.level = self.options.zlibCompressionLevel;
            }
            zlib.deflate(dataToBeCompressed, zlibOptions, callback);
            break;
        case 'zstd':
            if ('kModuleError' in deps_1.ZStandard) {
                return callback(deps_1.ZStandard['kModuleError']);
            }
            deps_1.ZStandard.compress(dataToBeCompressed, ZSTD_COMPRESSION_LEVEL).then(buffer => callback(undefined, buffer), error => callback(error));
            break;
        default:
            throw new error_1.MongoInvalidArgumentError(`Unknown compressor ${self.options.agreedCompressor} failed to compress`);
    }
}
exports.compress = compress;
// Decompress a message using the given compressor
function decompress(compressorID, compressedData, callback) {
    if (compressorID < 0 || compressorID > MAX_COMPRESSOR_ID) {
        throw new error_1.MongoDecompressionError(`Server sent message compressed using an unsupported compressor. (Received compressor ID ${compressorID})`);
    }
    switch (compressorID) {
        case exports.Compressor.snappy: {
            if ('kModuleError' in deps_1.Snappy) {
                return callback(deps_1.Snappy['kModuleError']);
            }
            if (deps_1.Snappy[deps_1.PKG_VERSION].major <= 6) {
                deps_1.Snappy.uncompress(compressedData, { asBuffer: true }, callback);
            }
            else {
                deps_1.Snappy.uncompress(compressedData, { asBuffer: true }).then(buffer => callback(undefined, buffer), error => callback(error));
            }
            break;
        }
        case exports.Compressor.zstd: {
            if ('kModuleError' in deps_1.ZStandard) {
                return callback(deps_1.ZStandard['kModuleError']);
            }
            deps_1.ZStandard.decompress(compressedData).then(buffer => callback(undefined, buffer), error => callback(error));
            break;
        }
        case exports.Compressor.zlib:
            zlib.inflate(compressedData, callback);
            break;
        default:
            callback(undefined, compressedData);
    }
}
exports.decompress = decompress;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.ConnectionPoolClearedEvent = exports.ConnectionCheckedInEvent = exports.ConnectionCheckedOutEvent = exports.ConnectionCheckOutFailedEvent = exports.ConnectionCheckOutStartedEvent = exports.ConnectionClosedEvent = exports.ConnectionReadyEvent = exports.ConnectionCreatedEvent = exports.ConnectionPoolClosedEvent = exports.ConnectionPoolReadyEvent = exports.ConnectionPoolCreatedEvent = exports.ConnectionPoolMonitoringEvent = void 0;
/**
 * The base export class for all monitoring events published from the connection pool
 * @public
 * @category Event
 */
class ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool) {
        this.time = new Date();
        this.address = pool.address;
    }
}
exports.ConnectionPoolMonitoringEvent = ConnectionPoolMonitoringEvent;
/**
 * An event published when a connection pool is created
 * @public
 * @category Event
 */
class ConnectionPoolCreatedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool) {
        super(pool);
        this.options = pool.options;
    }
}
exports.ConnectionPoolCreatedEvent = ConnectionPoolCreatedEvent;
/**
 * An event published when a connection pool is ready
 * @public
 * @category Event
 */
class ConnectionPoolReadyEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool) {
        super(pool);
    }
}
exports.ConnectionPoolReadyEvent = ConnectionPoolReadyEvent;
/**
 * An event published when a connection pool is closed
 * @public
 * @category Event
 */
class ConnectionPoolClosedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool) {
        super(pool);
    }
}
exports.ConnectionPoolClosedEvent = ConnectionPoolClosedEvent;
/**
 * An event published when a connection pool creates a new connection
 * @public
 * @category Event
 */
class ConnectionCreatedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, connection) {
        super(pool);
        this.connectionId = connection.id;
    }
}
exports.ConnectionCreatedEvent = ConnectionCreatedEvent;
/**
 * An event published when a connection is ready for use
 * @public
 * @category Event
 */
class ConnectionReadyEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, connection) {
        super(pool);
        this.connectionId = connection.id;
    }
}
exports.ConnectionReadyEvent = ConnectionReadyEvent;
/**
 * An event published when a connection is closed
 * @public
 * @category Event
 */
class ConnectionClosedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, connection, reason) {
        super(pool);
        this.connectionId = connection.id;
        this.reason = reason || 'unknown';
        this.serviceId = connection.serviceId;
    }
}
exports.ConnectionClosedEvent = ConnectionClosedEvent;
/**
 * An event published when a request to check a connection out begins
 * @public
 * @category Event
 */
class ConnectionCheckOutStartedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool) {
        super(pool);
    }
}
exports.ConnectionCheckOutStartedEvent = ConnectionCheckOutStartedEvent;
/**
 * An event published when a request to check a connection out fails
 * @public
 * @category Event
 */
class ConnectionCheckOutFailedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, reason) {
        super(pool);
        this.reason = reason;
    }
}
exports.ConnectionCheckOutFailedEvent = ConnectionCheckOutFailedEvent;
/**
 * An event published when a connection is checked out of the connection pool
 * @public
 * @category Event
 */
class ConnectionCheckedOutEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, connection) {
        super(pool);
        this.connectionId = connection.id;
    }
}
exports.ConnectionCheckedOutEvent = ConnectionCheckedOutEvent;
/**
 * An event published when a connection is checked into the connection pool
 * @public
 * @category Event
 */
class ConnectionCheckedInEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, connection) {
        super(pool);
        this.connectionId = connection.id;
    }
}
exports.ConnectionCheckedInEvent = ConnectionCheckedInEvent;
/**
 * An event published when a connection pool is cleared
 * @public
 * @category Event
 */
class ConnectionPoolClearedEvent extends ConnectionPoolMonitoringEvent {
    /** @internal */
    constructor(pool, options = {}) {
        super(pool);
        this.serviceId = options.serviceId;
        this.interruptInUseConnections = options.interruptInUseConnections;
    }
}
exports.ConnectionPoolClearedEvent = ConnectionPoolClearedEvent;
//# 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strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BinMsg = exports.Msg = exports.Response = exports.Query = void 0;
const BSON = require("../bson");
const error_1 = require("../error");
const read_preference_1 = require("../read_preference");
const utils_1 = require("../utils");
const constants_1 = require("./wire_protocol/constants");
// Incrementing request id
let _requestId = 0;
// Query flags
const OPTS_TAILABLE_CURSOR = 2;
const OPTS_SECONDARY = 4;
const OPTS_OPLOG_REPLAY = 8;
const OPTS_NO_CURSOR_TIMEOUT = 16;
const OPTS_AWAIT_DATA = 32;
const OPTS_EXHAUST = 64;
const OPTS_PARTIAL = 128;
// Response flags
const CURSOR_NOT_FOUND = 1;
const QUERY_FAILURE = 2;
const SHARD_CONFIG_STALE = 4;
const AWAIT_CAPABLE = 8;
/**************************************************************
 * QUERY
 **************************************************************/
/** @internal */
class Query {
    constructor(ns, query, options) {
        // Basic options needed to be passed in
        // TODO(NODE-3483): Replace with MongoCommandError
        if (ns == null)
            throw new error_1.MongoRuntimeError('Namespace must be specified for query');
        // TODO(NODE-3483): Replace with MongoCommandError
        if (query == null)
            throw new error_1.MongoRuntimeError('A query document must be specified for query');
        // Validate that we are not passing 0x00 in the collection name
        if (ns.indexOf('\x00') !== -1) {
            // TODO(NODE-3483): Use MongoNamespace static method
            throw new error_1.MongoRuntimeError('Namespace cannot contain a null character');
        }
        // Basic options
        this.ns = ns;
        this.query = query;
        // Additional options
        this.numberToSkip = options.numberToSkip || 0;
        this.numberToReturn = options.numberToReturn || 0;
        this.returnFieldSelector = options.returnFieldSelector || undefined;
        this.requestId = Query.getRequestId();
        // special case for pre-3.2 find commands, delete ASAP
        this.pre32Limit = options.pre32Limit;
        // Serialization option
        this.serializeFunctions =
            typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
        this.ignoreUndefined =
            typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : false;
        this.maxBsonSize = options.maxBsonSize || 1024 * 1024 * 16;
        this.checkKeys = typeof options.checkKeys === 'boolean' ? options.checkKeys : false;
        this.batchSize = this.numberToReturn;
        // Flags
        this.tailable = false;
        this.secondaryOk = typeof options.secondaryOk === 'boolean' ? options.secondaryOk : false;
        this.oplogReplay = false;
        this.noCursorTimeout = false;
        this.awaitData = false;
        this.exhaust = false;
        this.partial = false;
    }
    /** Assign next request Id. */
    incRequestId() {
        this.requestId = _requestId++;
    }
    /** Peek next request Id. */
    nextRequestId() {
        return _requestId + 1;
    }
    /** Increment then return next request Id. */
    static getRequestId() {
        return ++_requestId;
    }
    // Uses a single allocated buffer for the process, avoiding multiple memory allocations
    toBin() {
        const buffers = [];
        let projection = null;
        // Set up the flags
        let flags = 0;
        if (this.tailable) {
            flags |= OPTS_TAILABLE_CURSOR;
        }
        if (this.secondaryOk) {
            flags |= OPTS_SECONDARY;
        }
        if (this.oplogReplay) {
            flags |= OPTS_OPLOG_REPLAY;
        }
        if (this.noCursorTimeout) {
            flags |= OPTS_NO_CURSOR_TIMEOUT;
        }
        if (this.awaitData) {
            flags |= OPTS_AWAIT_DATA;
        }
        if (this.exhaust) {
            flags |= OPTS_EXHAUST;
        }
        if (this.partial) {
            flags |= OPTS_PARTIAL;
        }
        // If batchSize is different to this.numberToReturn
        if (this.batchSize !== this.numberToReturn)
            this.numberToReturn = this.batchSize;
        // Allocate write protocol header buffer
        const header = Buffer.alloc(4 * 4 + // Header
            4 + // Flags
            Buffer.byteLength(this.ns) +
            1 + // namespace
            4 + // numberToSkip
            4 // numberToReturn
        );
        // Add header to buffers
        buffers.push(header);
        // Serialize the query
        const query = BSON.serialize(this.query, {
            checkKeys: this.checkKeys,
            serializeFunctions: this.serializeFunctions,
            ignoreUndefined: this.ignoreUndefined
        });
        // Add query document
        buffers.push(query);
        if (this.returnFieldSelector && Object.keys(this.returnFieldSelector).length > 0) {
            // Serialize the projection document
            projection = BSON.serialize(this.returnFieldSelector, {
                checkKeys: this.checkKeys,
                serializeFunctions: this.serializeFunctions,
                ignoreUndefined: this.ignoreUndefined
            });
            // Add projection document
            buffers.push(projection);
        }
        // Total message size
        const totalLength = header.length + query.length + (projection ? projection.length : 0);
        // Set up the index
        let index = 4;
        // Write total document length
        header[3] = (totalLength >> 24) & 0xff;
        header[2] = (totalLength >> 16) & 0xff;
        header[1] = (totalLength >> 8) & 0xff;
        header[0] = totalLength & 0xff;
        // Write header information requestId
        header[index + 3] = (this.requestId >> 24) & 0xff;
        header[index + 2] = (this.requestId >> 16) & 0xff;
        header[index + 1] = (this.requestId >> 8) & 0xff;
        header[index] = this.requestId & 0xff;
        index = index + 4;
        // Write header information responseTo
        header[index + 3] = (0 >> 24) & 0xff;
        header[index + 2] = (0 >> 16) & 0xff;
        header[index + 1] = (0 >> 8) & 0xff;
        header[index] = 0 & 0xff;
        index = index + 4;
        // Write header information OP_QUERY
        header[index + 3] = (constants_1.OP_QUERY >> 24) & 0xff;
        header[index + 2] = (constants_1.OP_QUERY >> 16) & 0xff;
        header[index + 1] = (constants_1.OP_QUERY >> 8) & 0xff;
        header[index] = constants_1.OP_QUERY & 0xff;
        index = index + 4;
        // Write header information flags
        header[index + 3] = (flags >> 24) & 0xff;
        header[index + 2] = (flags >> 16) & 0xff;
        header[index + 1] = (flags >> 8) & 0xff;
        header[index] = flags & 0xff;
        index = index + 4;
        // Write collection name
        index = index + header.write(this.ns, index, 'utf8') + 1;
        header[index - 1] = 0;
        // Write header information flags numberToSkip
        header[index + 3] = (this.numberToSkip >> 24) & 0xff;
        header[index + 2] = (this.numberToSkip >> 16) & 0xff;
        header[index + 1] = (this.numberToSkip >> 8) & 0xff;
        header[index] = this.numberToSkip & 0xff;
        index = index + 4;
        // Write header information flags numberToReturn
        header[index + 3] = (this.numberToReturn >> 24) & 0xff;
        header[index + 2] = (this.numberToReturn >> 16) & 0xff;
        header[index + 1] = (this.numberToReturn >> 8) & 0xff;
        header[index] = this.numberToReturn & 0xff;
        index = index + 4;
        // Return the buffers
        return buffers;
    }
}
exports.Query = Query;
/** @internal */
class Response {
    constructor(message, msgHeader, msgBody, opts) {
        this.documents = new Array(0);
        this.parsed = false;
        this.raw = message;
        this.data = msgBody;
        this.opts = opts !== null && opts !== void 0 ? opts : {
            promoteLongs: true,
            promoteValues: true,
            promoteBuffers: false,
            bsonRegExp: false
        };
        // Read the message header
        this.length = msgHeader.length;
        this.requestId = msgHeader.requestId;
        this.responseTo = msgHeader.responseTo;
        this.opCode = msgHeader.opCode;
        this.fromCompressed = msgHeader.fromCompressed;
        // Flag values
        this.promoteLongs = typeof this.opts.promoteLongs === 'boolean' ? this.opts.promoteLongs : true;
        this.promoteValues =
            typeof this.opts.promoteValues === 'boolean' ? this.opts.promoteValues : true;
        this.promoteBuffers =
            typeof this.opts.promoteBuffers === 'boolean' ? this.opts.promoteBuffers : false;
        this.bsonRegExp = typeof this.opts.bsonRegExp === 'boolean' ? this.opts.bsonRegExp : false;
    }
    isParsed() {
        return this.parsed;
    }
    parse(options) {
        var _a, _b, _c, _d;
        // Don't parse again if not needed
        if (this.parsed)
            return;
        options = options !== null && options !== void 0 ? options : {};
        // Allow the return of raw documents instead of parsing
        const raw = options.raw || false;
        const documentsReturnedIn = options.documentsReturnedIn || null;
        const promoteLongs = (_a = options.promoteLongs) !== null && _a !== void 0 ? _a : this.opts.promoteLongs;
        const promoteValues = (_b = options.promoteValues) !== null && _b !== void 0 ? _b : this.opts.promoteValues;
        const promoteBuffers = (_c = options.promoteBuffers) !== null && _c !== void 0 ? _c : this.opts.promoteBuffers;
        const bsonRegExp = (_d = options.bsonRegExp) !== null && _d !== void 0 ? _d : this.opts.bsonRegExp;
        let bsonSize;
        // Set up the options
        const _options = {
            promoteLongs,
            promoteValues,
            promoteBuffers,
            bsonRegExp
        };
        // Position within OP_REPLY at which documents start
        // (See https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#wire-op-reply)
        this.index = 20;
        // Read the message body
        this.responseFlags = this.data.readInt32LE(0);
        this.cursorId = new BSON.Long(this.data.readInt32LE(4), this.data.readInt32LE(8));
        this.startingFrom = this.data.readInt32LE(12);
        this.numberReturned = this.data.readInt32LE(16);
        // Preallocate document array
        this.documents = new Array(this.numberReturned);
        this.cursorNotFound = (this.responseFlags & CURSOR_NOT_FOUND) !== 0;
        this.queryFailure = (this.responseFlags & QUERY_FAILURE) !== 0;
        this.shardConfigStale = (this.responseFlags & SHARD_CONFIG_STALE) !== 0;
        this.awaitCapable = (this.responseFlags & AWAIT_CAPABLE) !== 0;
        // Parse Body
        for (let i = 0; i < this.numberReturned; i++) {
            bsonSize =
                this.data[this.index] |
                    (this.data[this.index + 1] << 8) |
                    (this.data[this.index + 2] << 16) |
                    (this.data[this.index + 3] << 24);
            // If we have raw results specified slice the return document
            if (raw) {
                this.documents[i] = this.data.slice(this.index, this.index + bsonSize);
            }
            else {
                this.documents[i] = BSON.deserialize(this.data.slice(this.index, this.index + bsonSize), _options);
            }
            // Adjust the index
            this.index = this.index + bsonSize;
        }
        if (this.documents.length === 1 && documentsReturnedIn != null && raw) {
            const fieldsAsRaw = {};
            fieldsAsRaw[documentsReturnedIn] = true;
            _options.fieldsAsRaw = fieldsAsRaw;
            const doc = BSON.deserialize(this.documents[0], _options);
            this.documents = [doc];
        }
        // Set parsed
        this.parsed = true;
    }
}
exports.Response = Response;
// Implementation of OP_MSG spec:
// https://github.com/mongodb/specifications/blob/master/source/message/OP_MSG.rst
//
// struct Section {
//   uint8 payloadType;
//   union payload {
//       document  document; // payloadType == 0
//       struct sequence { // payloadType == 1
//           int32      size;
//           cstring    identifier;
//           document*  documents;
//       };
//   };
// };
// struct OP_MSG {
//   struct MsgHeader {
//       int32  messageLength;
//       int32  requestID;
//       int32  responseTo;
//       int32  opCode = 2013;
//   };
//   uint32      flagBits;
//   Section+    sections;
//   [uint32     checksum;]
// };
// Msg Flags
const OPTS_CHECKSUM_PRESENT = 1;
const OPTS_MORE_TO_COME = 2;
const OPTS_EXHAUST_ALLOWED = 1 << 16;
/** @internal */
class Msg {
    constructor(ns, command, options) {
        // Basic options needed to be passed in
        if (command == null)
            throw new error_1.MongoInvalidArgumentError('Query document must be specified for query');
        // Basic options
        this.ns = ns;
        this.command = command;
        this.command.$db = (0, utils_1.databaseNamespace)(ns);
        if (options.readPreference && options.readPreference.mode !== read_preference_1.ReadPreference.PRIMARY) {
            this.command.$readPreference = options.readPreference.toJSON();
        }
        // Ensure empty options
        this.options = options !== null && options !== void 0 ? options : {};
        // Additional options
        this.requestId = options.requestId ? options.requestId : Msg.getRequestId();
        // Serialization option
        this.serializeFunctions =
            typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
        this.ignoreUndefined =
            typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : false;
        this.checkKeys = typeof options.checkKeys === 'boolean' ? options.checkKeys : false;
        this.maxBsonSize = options.maxBsonSize || 1024 * 1024 * 16;
        // flags
        this.checksumPresent = false;
        this.moreToCome = options.moreToCome || false;
        this.exhaustAllowed =
            typeof options.exhaustAllowed === 'boolean' ? options.exhaustAllowed : false;
    }
    toBin() {
        const buffers = [];
        let flags = 0;
        if (this.checksumPresent) {
            flags |= OPTS_CHECKSUM_PRESENT;
        }
        if (this.moreToCome) {
            flags |= OPTS_MORE_TO_COME;
        }
        if (this.exhaustAllowed) {
            flags |= OPTS_EXHAUST_ALLOWED;
        }
        const header = Buffer.alloc(4 * 4 + // Header
            4 // Flags
        );
        buffers.push(header);
        let totalLength = header.length;
        const command = this.command;
        totalLength += this.makeDocumentSegment(buffers, command);
        header.writeInt32LE(totalLength, 0); // messageLength
        header.writeInt32LE(this.requestId, 4); // requestID
        header.writeInt32LE(0, 8); // responseTo
        header.writeInt32LE(constants_1.OP_MSG, 12); // opCode
        header.writeUInt32LE(flags, 16); // flags
        return buffers;
    }
    makeDocumentSegment(buffers, document) {
        const payloadTypeBuffer = Buffer.alloc(1);
        payloadTypeBuffer[0] = 0;
        const documentBuffer = this.serializeBson(document);
        buffers.push(payloadTypeBuffer);
        buffers.push(documentBuffer);
        return payloadTypeBuffer.length + documentBuffer.length;
    }
    serializeBson(document) {
        return BSON.serialize(document, {
            checkKeys: this.checkKeys,
            serializeFunctions: this.serializeFunctions,
            ignoreUndefined: this.ignoreUndefined
        });
    }
    static getRequestId() {
        _requestId = (_requestId + 1) & 0x7fffffff;
        return _requestId;
    }
}
exports.Msg = Msg;
/** @internal */
class BinMsg {
    constructor(message, msgHeader, msgBody, opts) {
        this.parsed = false;
        this.raw = message;
        this.data = msgBody;
        this.opts = opts !== null && opts !== void 0 ? opts : {
            promoteLongs: true,
            promoteValues: true,
            promoteBuffers: false,
            bsonRegExp: false
        };
        // Read the message header
        this.length = msgHeader.length;
        this.requestId = msgHeader.requestId;
        this.responseTo = msgHeader.responseTo;
        this.opCode = msgHeader.opCode;
        this.fromCompressed = msgHeader.fromCompressed;
        // Read response flags
        this.responseFlags = msgBody.readInt32LE(0);
        this.checksumPresent = (this.responseFlags & OPTS_CHECKSUM_PRESENT) !== 0;
        this.moreToCome = (this.responseFlags & OPTS_MORE_TO_COME) !== 0;
        this.exhaustAllowed = (this.responseFlags & OPTS_EXHAUST_ALLOWED) !== 0;
        this.promoteLongs = typeof this.opts.promoteLongs === 'boolean' ? this.opts.promoteLongs : true;
        this.promoteValues =
            typeof this.opts.promoteValues === 'boolean' ? this.opts.promoteValues : true;
        this.promoteBuffers =
            typeof this.opts.promoteBuffers === 'boolean' ? this.opts.promoteBuffers : false;
        this.bsonRegExp = typeof this.opts.bsonRegExp === 'boolean' ? this.opts.bsonRegExp : false;
        this.documents = [];
    }
    isParsed() {
        return this.parsed;
    }
    parse(options) {
        var _a, _b, _c, _d;
        // Don't parse again if not needed
        if (this.parsed)
            return;
        options = options !== null && options !== void 0 ? options : {};
        this.index = 4;
        // Allow the return of raw documents instead of parsing
        const raw = options.raw || false;
        const documentsReturnedIn = options.documentsReturnedIn || null;
        const promoteLongs = (_a = options.promoteLongs) !== null && _a !== void 0 ? _a : this.opts.promoteLongs;
        const promoteValues = (_b = options.promoteValues) !== null && _b !== void 0 ? _b : this.opts.promoteValues;
        const promoteBuffers = (_c = options.promoteBuffers) !== null && _c !== void 0 ? _c : this.opts.promoteBuffers;
        const bsonRegExp = (_d = options.bsonRegExp) !== null && _d !== void 0 ? _d : this.opts.bsonRegExp;
        const validation = this.parseBsonSerializationOptions(options);
        // Set up the options
        const bsonOptions = {
            promoteLongs,
            promoteValues,
            promoteBuffers,
            bsonRegExp,
            validation
            // Due to the strictness of the BSON libraries validation option we need this cast
        };
        while (this.index < this.data.length) {
            const payloadType = this.data.readUInt8(this.index++);
            if (payloadType === 0) {
                const bsonSize = this.data.readUInt32LE(this.index);
                const bin = this.data.slice(this.index, this.index + bsonSize);
                this.documents.push(raw ? bin : BSON.deserialize(bin, bsonOptions));
                this.index += bsonSize;
            }
            else if (payloadType === 1) {
                // It was decided that no driver makes use of payload type 1
                // TODO(NODE-3483): Replace with MongoDeprecationError
                throw new error_1.MongoRuntimeError('OP_MSG Payload Type 1 detected unsupported protocol');
            }
        }
        if (this.documents.length === 1 && documentsReturnedIn != null && raw) {
            const fieldsAsRaw = {};
            fieldsAsRaw[documentsReturnedIn] = true;
            bsonOptions.fieldsAsRaw = fieldsAsRaw;
            const doc = BSON.deserialize(this.documents[0], bsonOptions);
            this.documents = [doc];
        }
        this.parsed = true;
    }
    parseBsonSerializationOptions({ enableUtf8Validation }) {
        if (enableUtf8Validation === false) {
            return { utf8: false };
        }
        return { utf8: { writeErrors: false } };
    }
}
exports.BinMsg = BinMsg;
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��connect.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.LEGAL_TCP_SOCKET_OPTIONS = exports.LEGAL_TLS_SOCKET_OPTIONS = exports.prepareHandshakeDocument = exports.connect = void 0;
const net = require("net");
const socks_1 = require("socks");
const tls = require("tls");
const bson_1 = require("../bson");
const constants_1 = require("../constants");
const error_1 = require("../error");
const utils_1 = require("../utils");
const auth_provider_1 = require("./auth/auth_provider");
const gssapi_1 = require("./auth/gssapi");
const mongocr_1 = require("./auth/mongocr");
const mongodb_aws_1 = require("./auth/mongodb_aws");
const plain_1 = require("./auth/plain");
const providers_1 = require("./auth/providers");
const scram_1 = require("./auth/scram");
const x509_1 = require("./auth/x509");
const connection_1 = require("./connection");
const constants_2 = require("./wire_protocol/constants");
const AUTH_PROVIDERS = new Map([
    [providers_1.AuthMechanism.MONGODB_AWS, new mongodb_aws_1.MongoDBAWS()],
    [providers_1.AuthMechanism.MONGODB_CR, new mongocr_1.MongoCR()],
    [providers_1.AuthMechanism.MONGODB_GSSAPI, new gssapi_1.GSSAPI()],
    [providers_1.AuthMechanism.MONGODB_PLAIN, new plain_1.Plain()],
    [providers_1.AuthMechanism.MONGODB_SCRAM_SHA1, new scram_1.ScramSHA1()],
    [providers_1.AuthMechanism.MONGODB_SCRAM_SHA256, new scram_1.ScramSHA256()],
    [providers_1.AuthMechanism.MONGODB_X509, new x509_1.X509()]
]);
function connect(options, callback) {
    makeConnection({ ...options, existingSocket: undefined }, (err, socket) => {
        var _a;
        if (err || !socket) {
            return callback(err);
        }
        let ConnectionType = (_a = options.connectionType) !== null && _a !== void 0 ? _a : connection_1.Connection;
        if (options.autoEncrypter) {
            ConnectionType = connection_1.CryptoConnection;
        }
        performInitialHandshake(new ConnectionType(socket, options), options, callback);
    });
}
exports.connect = connect;
function checkSupportedServer(hello, options) {
    var _a;
    const serverVersionHighEnough = hello &&
        (typeof hello.maxWireVersion === 'number' || hello.maxWireVersion instanceof bson_1.Int32) &&
        hello.maxWireVersion >= constants_2.MIN_SUPPORTED_WIRE_VERSION;
    const serverVersionLowEnough = hello &&
        (typeof hello.minWireVersion === 'number' || hello.minWireVersion instanceof bson_1.Int32) &&
        hello.minWireVersion <= constants_2.MAX_SUPPORTED_WIRE_VERSION;
    if (serverVersionHighEnough) {
        if (serverVersionLowEnough) {
            return null;
        }
        const message = `Server at ${options.hostAddress} reports minimum wire version ${JSON.stringify(hello.minWireVersion)}, but this version of the Node.js Driver requires at most ${constants_2.MAX_SUPPORTED_WIRE_VERSION} (MongoDB ${constants_2.MAX_SUPPORTED_SERVER_VERSION})`;
        return new error_1.MongoCompatibilityError(message);
    }
    const message = `Server at ${options.hostAddress} reports maximum wire version ${(_a = JSON.stringify(hello.maxWireVersion)) !== null && _a !== void 0 ? _a : 0}, but this version of the Node.js Driver requires at least ${constants_2.MIN_SUPPORTED_WIRE_VERSION} (MongoDB ${constants_2.MIN_SUPPORTED_SERVER_VERSION})`;
    return new error_1.MongoCompatibilityError(message);
}
function performInitialHandshake(conn, options, _callback) {
    const callback = function (err, ret) {
        if (err && conn) {
            conn.destroy();
        }
        _callback(err, ret);
    };
    const credentials = options.credentials;
    if (credentials) {
        if (!(credentials.mechanism === providers_1.AuthMechanism.MONGODB_DEFAULT) &&
            !AUTH_PROVIDERS.get(credentials.mechanism)) {
            callback(new error_1.MongoInvalidArgumentError(`AuthMechanism '${credentials.mechanism}' not supported`));
            return;
        }
    }
    const authContext = new auth_provider_1.AuthContext(conn, credentials, options);
    prepareHandshakeDocument(authContext, (err, handshakeDoc) => {
        if (err || !handshakeDoc) {
            return callback(err);
        }
        const handshakeOptions = Object.assign({}, options);
        if (typeof options.connectTimeoutMS === 'number') {
            // The handshake technically is a monitoring check, so its socket timeout should be connectTimeoutMS
            handshakeOptions.socketTimeoutMS = options.connectTimeoutMS;
        }
        const start = new Date().getTime();
        conn.command((0, utils_1.ns)('admin.$cmd'), handshakeDoc, handshakeOptions, (err, response) => {
            if (err) {
                callback(err);
                return;
            }
            if ((response === null || response === void 0 ? void 0 : response.ok) === 0) {
                callback(new error_1.MongoServerError(response));
                return;
            }
            if (!('isWritablePrimary' in response)) {
                // Provide hello-style response document.
                response.isWritablePrimary = response[constants_1.LEGACY_HELLO_COMMAND];
            }
            if (response.helloOk) {
                conn.helloOk = true;
            }
            const supportedServerErr = checkSupportedServer(response, options);
            if (supportedServerErr) {
                callback(supportedServerErr);
                return;
            }
            if (options.loadBalanced) {
                if (!response.serviceId) {
                    return callback(new error_1.MongoCompatibilityError('Driver attempted to initialize in load balancing mode, ' +
                        'but the server does not support this mode.'));
                }
            }
            // NOTE: This is metadata attached to the connection while porting away from
            //       handshake being done in the `Server` class. Likely, it should be
            //       relocated, or at very least restructured.
            conn.hello = response;
            conn.lastHelloMS = new Date().getTime() - start;
            if (!response.arbiterOnly && credentials) {
                // store the response on auth context
                authContext.response = response;
                const resolvedCredentials = credentials.resolveAuthMechanism(response);
                const provider = AUTH_PROVIDERS.get(resolvedCredentials.mechanism);
                if (!provider) {
                    return callback(new error_1.MongoInvalidArgumentError(`No AuthProvider for ${resolvedCredentials.mechanism} defined.`));
                }
                provider.auth(authContext, err => {
                    if (err) {
                        if (err instanceof error_1.MongoError) {
                            err.addErrorLabel(error_1.MongoErrorLabel.HandshakeError);
                            if ((0, error_1.needsRetryableWriteLabel)(err, response.maxWireVersion)) {
                                err.addErrorLabel(error_1.MongoErrorLabel.RetryableWriteError);
                            }
                        }
                        return callback(err);
                    }
                    callback(undefined, conn);
                });
                return;
            }
            callback(undefined, conn);
        });
    });
}
/**
 * @internal
 *
 * This function is only exposed for testing purposes.
 */
function prepareHandshakeDocument(authContext, callback) {
    const options = authContext.options;
    const compressors = options.compressors ? options.compressors : [];
    const { serverApi } = authContext.connection;
    const handshakeDoc = {
        [(serverApi === null || serverApi === void 0 ? void 0 : serverApi.version) ? 'hello' : constants_1.LEGACY_HELLO_COMMAND]: true,
        helloOk: true,
        client: options.metadata || (0, utils_1.makeClientMetadata)(options),
        compression: compressors
    };
    if (options.loadBalanced === true) {
        handshakeDoc.loadBalanced = true;
    }
    const credentials = authContext.credentials;
    if (credentials) {
        if (credentials.mechanism === providers_1.AuthMechanism.MONGODB_DEFAULT && credentials.username) {
            handshakeDoc.saslSupportedMechs = `${credentials.source}.${credentials.username}`;
            const provider = AUTH_PROVIDERS.get(providers_1.AuthMechanism.MONGODB_SCRAM_SHA256);
            if (!provider) {
                // This auth mechanism is always present.
                return callback(new error_1.MongoInvalidArgumentError(`No AuthProvider for ${providers_1.AuthMechanism.MONGODB_SCRAM_SHA256} defined.`));
            }
            return provider.prepare(handshakeDoc, authContext, callback);
        }
        const provider = AUTH_PROVIDERS.get(credentials.mechanism);
        if (!provider) {
            return callback(new error_1.MongoInvalidArgumentError(`No AuthProvider for ${credentials.mechanism} defined.`));
        }
        return provider.prepare(handshakeDoc, authContext, callback);
    }
    callback(undefined, handshakeDoc);
}
exports.prepareHandshakeDocument = prepareHandshakeDocument;
/** @public */
exports.LEGAL_TLS_SOCKET_OPTIONS = [
    'ALPNProtocols',
    'ca',
    'cert',
    'checkServerIdentity',
    'ciphers',
    'crl',
    'ecdhCurve',
    'key',
    'minDHSize',
    'passphrase',
    'pfx',
    'rejectUnauthorized',
    'secureContext',
    'secureProtocol',
    'servername',
    'session'
];
/** @public */
exports.LEGAL_TCP_SOCKET_OPTIONS = [
    'family',
    'hints',
    'localAddress',
    'localPort',
    'lookup'
];
function parseConnectOptions(options) {
    const hostAddress = options.hostAddress;
    if (!hostAddress)
        throw new error_1.MongoInvalidArgumentError('Option "hostAddress" is required');
    const result = {};
    for (const name of exports.LEGAL_TCP_SOCKET_OPTIONS) {
        if (options[name] != null) {
            result[name] = options[name];
        }
    }
    if (typeof hostAddress.socketPath === 'string') {
        result.path = hostAddress.socketPath;
        return result;
    }
    else if (typeof hostAddress.host === 'string') {
        result.host = hostAddress.host;
        result.port = hostAddress.port;
        return result;
    }
    else {
        // This should never happen since we set up HostAddresses
        // But if we don't throw here the socket could hang until timeout
        // TODO(NODE-3483)
        throw new error_1.MongoRuntimeError(`Unexpected HostAddress ${JSON.stringify(hostAddress)}`);
    }
}
function parseSslOptions(options) {
    const result = parseConnectOptions(options);
    // Merge in valid SSL options
    for (const name of exports.LEGAL_TLS_SOCKET_OPTIONS) {
        if (options[name] != null) {
            result[name] = options[name];
        }
    }
    if (options.existingSocket) {
        result.socket = options.existingSocket;
    }
    // Set default sni servername to be the same as host
    if (result.servername == null && result.host && !net.isIP(result.host)) {
        result.servername = result.host;
    }
    return result;
}
const SOCKET_ERROR_EVENT_LIST = ['error', 'close', 'timeout', 'parseError'];
const SOCKET_ERROR_EVENTS = new Set(SOCKET_ERROR_EVENT_LIST);
function makeConnection(options, _callback) {
    var _a, _b, _c, _d, _e, _f, _g, _h, _j;
    const useTLS = (_a = options.tls) !== null && _a !== void 0 ? _a : false;
    const keepAlive = (_b = options.keepAlive) !== null && _b !== void 0 ? _b : true;
    const socketTimeoutMS = (_d = (_c = options.socketTimeoutMS) !== null && _c !== void 0 ? _c : Reflect.get(options, 'socketTimeout')) !== null && _d !== void 0 ? _d : 0;
    const noDelay = (_e = options.noDelay) !== null && _e !== void 0 ? _e : true;
    const connectTimeoutMS = (_f = options.connectTimeoutMS) !== null && _f !== void 0 ? _f : 30000;
    const rejectUnauthorized = (_g = options.rejectUnauthorized) !== null && _g !== void 0 ? _g : true;
    const keepAliveInitialDelay = (_j = (((_h = options.keepAliveInitialDelay) !== null && _h !== void 0 ? _h : 120000) > socketTimeoutMS
        ? Math.round(socketTimeoutMS / 2)
        : options.keepAliveInitialDelay)) !== null && _j !== void 0 ? _j : 120000;
    const existingSocket = options.existingSocket;
    let socket;
    const callback = function (err, ret) {
        if (err && socket) {
            socket.destroy();
        }
        _callback(err, ret);
    };
    if (options.proxyHost != null) {
        // Currently, only Socks5 is supported.
        return makeSocks5Connection({
            ...options,
            connectTimeoutMS // Should always be present for Socks5
        }, callback);
    }
    if (useTLS) {
        const tlsSocket = tls.connect(parseSslOptions(options));
        if (typeof tlsSocket.disableRenegotiation === 'function') {
            tlsSocket.disableRenegotiation();
        }
        socket = tlsSocket;
    }
    else if (existingSocket) {
        // In the TLS case, parseSslOptions() sets options.socket to existingSocket,
        // so we only need to handle the non-TLS case here (where existingSocket
        // gives us all we need out of the box).
        socket = existingSocket;
    }
    else {
        socket = net.createConnection(parseConnectOptions(options));
    }
    socket.setKeepAlive(keepAlive, keepAliveInitialDelay);
    socket.setTimeout(connectTimeoutMS);
    socket.setNoDelay(noDelay);
    const connectEvent = useTLS ? 'secureConnect' : 'connect';
    let cancellationHandler;
    function errorHandler(eventName) {
        return (err) => {
            SOCKET_ERROR_EVENTS.forEach(event => socket.removeAllListeners(event));
            if (cancellationHandler && options.cancellationToken) {
                options.cancellationToken.removeListener('cancel', cancellationHandler);
            }
            socket.removeListener(connectEvent, connectHandler);
            callback(connectionFailureError(eventName, err));
        };
    }
    function connectHandler() {
        SOCKET_ERROR_EVENTS.forEach(event => socket.removeAllListeners(event));
        if (cancellationHandler && options.cancellationToken) {
            options.cancellationToken.removeListener('cancel', cancellationHandler);
        }
        if ('authorizationError' in socket) {
            if (socket.authorizationError && rejectUnauthorized) {
                return callback(socket.authorizationError);
            }
        }
        socket.setTimeout(socketTimeoutMS);
        callback(undefined, socket);
    }
    SOCKET_ERROR_EVENTS.forEach(event => socket.once(event, errorHandler(event)));
    if (options.cancellationToken) {
        cancellationHandler = errorHandler('cancel');
        options.cancellationToken.once('cancel', cancellationHandler);
    }
    if (existingSocket) {
        process.nextTick(connectHandler);
    }
    else {
        socket.once(connectEvent, connectHandler);
    }
}
function makeSocks5Connection(options, callback) {
    var _a, _b;
    const hostAddress = utils_1.HostAddress.fromHostPort((_a = options.proxyHost) !== null && _a !== void 0 ? _a : '', // proxyHost is guaranteed to set here
    (_b = options.proxyPort) !== null && _b !== void 0 ? _b : 1080);
    // First, connect to the proxy server itself:
    makeConnection({
        ...options,
        hostAddress,
        tls: false,
        proxyHost: undefined
    }, (err, rawSocket) => {
        if (err) {
            return callback(err);
        }
        const destination = parseConnectOptions(options);
        if (typeof destination.host !== 'string' || typeof destination.port !== 'number') {
            return callback(new error_1.MongoInvalidArgumentError('Can only make Socks5 connections to TCP hosts'));
        }
        // Then, establish the Socks5 proxy connection:
        socks_1.SocksClient.createConnection({
            existing_socket: rawSocket,
            timeout: options.connectTimeoutMS,
            command: 'connect',
            destination: {
                host: destination.host,
                port: destination.port
            },
            proxy: {
                // host and port are ignored because we pass existing_socket
                host: 'iLoveJavaScript',
                port: 0,
                type: 5,
                userId: options.proxyUsername || undefined,
                password: options.proxyPassword || undefined
            }
        }).then(({ socket }) => {
            // Finally, now treat the resulting duplex stream as the
            // socket over which we send and receive wire protocol messages:
            makeConnection({
                ...options,
                existingSocket: socket,
                proxyHost: undefined
            }, callback);
        }, error => callback(connectionFailureError('error', error)));
    });
}
function connectionFailureError(type, err) {
    switch (type) {
        case 'error':
            return new error_1.MongoNetworkError(err);
        case 'timeout':
            return new error_1.MongoNetworkTimeoutError('connection timed out');
        case 'close':
            return new error_1.MongoNetworkError('connection closed');
        case 'cancel':
            return new error_1.MongoNetworkError('connection establishment was cancelled');
        default:
            return new error_1.MongoNetworkError('unknown network error');
    }
}
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Object.defineProperty(exports, "__esModule", { value: true });
exports.AUTH_MECHS_AUTH_SRC_EXTERNAL = exports.AuthMechanism = void 0;
/** @public */
exports.AuthMechanism = Object.freeze({
    MONGODB_AWS: 'MONGODB-AWS',
    MONGODB_CR: 'MONGODB-CR',
    MONGODB_DEFAULT: 'DEFAULT',
    MONGODB_GSSAPI: 'GSSAPI',
    MONGODB_PLAIN: 'PLAIN',
    MONGODB_SCRAM_SHA1: 'SCRAM-SHA-1',
    MONGODB_SCRAM_SHA256: 'SCRAM-SHA-256',
    MONGODB_X509: 'MONGODB-X509'
});
/** @internal */
exports.AUTH_MECHS_AUTH_SRC_EXTERNAL = new Set([
    exports.AuthMechanism.MONGODB_GSSAPI,
    exports.AuthMechanism.MONGODB_AWS,
    exports.AuthMechanism.MONGODB_X509
]);
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��auth/scram.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ScramSHA256 = exports.ScramSHA1 = void 0;
const crypto = require("crypto");
const bson_1 = require("../../bson");
const deps_1 = require("../../deps");
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const auth_provider_1 = require("./auth_provider");
const providers_1 = require("./providers");
class ScramSHA extends auth_provider_1.AuthProvider {
    constructor(cryptoMethod) {
        super();
        this.cryptoMethod = cryptoMethod || 'sha1';
    }
    prepare(handshakeDoc, authContext, callback) {
        const cryptoMethod = this.cryptoMethod;
        const credentials = authContext.credentials;
        if (!credentials) {
            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
        }
        if (cryptoMethod === 'sha256' && deps_1.saslprep == null) {
            (0, utils_1.emitWarning)('Warning: no saslprep library specified. Passwords will not be sanitized');
        }
        crypto.randomBytes(24, (err, nonce) => {
            if (err) {
                return callback(err);
            }
            // store the nonce for later use
            Object.assign(authContext, { nonce });
            const request = Object.assign({}, handshakeDoc, {
                speculativeAuthenticate: Object.assign(makeFirstMessage(cryptoMethod, credentials, nonce), {
                    db: credentials.source
                })
            });
            callback(undefined, request);
        });
    }
    auth(authContext, callback) {
        const response = authContext.response;
        if (response && response.speculativeAuthenticate) {
            continueScramConversation(this.cryptoMethod, response.speculativeAuthenticate, authContext, callback);
            return;
        }
        executeScram(this.cryptoMethod, authContext, callback);
    }
}
function cleanUsername(username) {
    return username.replace('=', '=3D').replace(',', '=2C');
}
function clientFirstMessageBare(username, nonce) {
    // NOTE: This is done b/c Javascript uses UTF-16, but the server is hashing in UTF-8.
    // Since the username is not sasl-prep-d, we need to do this here.
    return Buffer.concat([
        Buffer.from('n=', 'utf8'),
        Buffer.from(username, 'utf8'),
        Buffer.from(',r=', 'utf8'),
        Buffer.from(nonce.toString('base64'), 'utf8')
    ]);
}
function makeFirstMessage(cryptoMethod, credentials, nonce) {
    const username = cleanUsername(credentials.username);
    const mechanism = cryptoMethod === 'sha1' ? providers_1.AuthMechanism.MONGODB_SCRAM_SHA1 : providers_1.AuthMechanism.MONGODB_SCRAM_SHA256;
    // NOTE: This is done b/c Javascript uses UTF-16, but the server is hashing in UTF-8.
    // Since the username is not sasl-prep-d, we need to do this here.
    return {
        saslStart: 1,
        mechanism,
        payload: new bson_1.Binary(Buffer.concat([Buffer.from('n,,', 'utf8'), clientFirstMessageBare(username, nonce)])),
        autoAuthorize: 1,
        options: { skipEmptyExchange: true }
    };
}
function executeScram(cryptoMethod, authContext, callback) {
    const { connection, credentials } = authContext;
    if (!credentials) {
        return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    if (!authContext.nonce) {
        return callback(new error_1.MongoInvalidArgumentError('AuthContext must contain a valid nonce property'));
    }
    const nonce = authContext.nonce;
    const db = credentials.source;
    const saslStartCmd = makeFirstMessage(cryptoMethod, credentials, nonce);
    connection.command((0, utils_1.ns)(`${db}.$cmd`), saslStartCmd, undefined, (_err, result) => {
        const err = resolveError(_err, result);
        if (err) {
            return callback(err);
        }
        continueScramConversation(cryptoMethod, result, authContext, callback);
    });
}
function continueScramConversation(cryptoMethod, response, authContext, callback) {
    const connection = authContext.connection;
    const credentials = authContext.credentials;
    if (!credentials) {
        return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    if (!authContext.nonce) {
        return callback(new error_1.MongoInvalidArgumentError('Unable to continue SCRAM without valid nonce'));
    }
    const nonce = authContext.nonce;
    const db = credentials.source;
    const username = cleanUsername(credentials.username);
    const password = credentials.password;
    let processedPassword;
    if (cryptoMethod === 'sha256') {
        processedPassword = 'kModuleError' in deps_1.saslprep ? password : (0, deps_1.saslprep)(password);
    }
    else {
        try {
            processedPassword = passwordDigest(username, password);
        }
        catch (e) {
            return callback(e);
        }
    }
    const payload = Buffer.isBuffer(response.payload)
        ? new bson_1.Binary(response.payload)
        : response.payload;
    const dict = parsePayload(payload.value());
    const iterations = parseInt(dict.i, 10);
    if (iterations && iterations < 4096) {
        callback(
        // TODO(NODE-3483)
        new error_1.MongoRuntimeError(`Server returned an invalid iteration count ${iterations}`), false);
        return;
    }
    const salt = dict.s;
    const rnonce = dict.r;
    if (rnonce.startsWith('nonce')) {
        // TODO(NODE-3483)
        callback(new error_1.MongoRuntimeError(`Server returned an invalid nonce: ${rnonce}`), false);
        return;
    }
    // Set up start of proof
    const withoutProof = `c=biws,r=${rnonce}`;
    const saltedPassword = HI(processedPassword, Buffer.from(salt, 'base64'), iterations, cryptoMethod);
    const clientKey = HMAC(cryptoMethod, saltedPassword, 'Client Key');
    const serverKey = HMAC(cryptoMethod, saltedPassword, 'Server Key');
    const storedKey = H(cryptoMethod, clientKey);
    const authMessage = [clientFirstMessageBare(username, nonce), payload.value(), withoutProof].join(',');
    const clientSignature = HMAC(cryptoMethod, storedKey, authMessage);
    const clientProof = `p=${xor(clientKey, clientSignature)}`;
    const clientFinal = [withoutProof, clientProof].join(',');
    const serverSignature = HMAC(cryptoMethod, serverKey, authMessage);
    const saslContinueCmd = {
        saslContinue: 1,
        conversationId: response.conversationId,
        payload: new bson_1.Binary(Buffer.from(clientFinal))
    };
    connection.command((0, utils_1.ns)(`${db}.$cmd`), saslContinueCmd, undefined, (_err, r) => {
        const err = resolveError(_err, r);
        if (err) {
            return callback(err);
        }
        const parsedResponse = parsePayload(r.payload.value());
        if (!compareDigest(Buffer.from(parsedResponse.v, 'base64'), serverSignature)) {
            callback(new error_1.MongoRuntimeError('Server returned an invalid signature'));
            return;
        }
        if (!r || r.done !== false) {
            return callback(err, r);
        }
        const retrySaslContinueCmd = {
            saslContinue: 1,
            conversationId: r.conversationId,
            payload: Buffer.alloc(0)
        };
        connection.command((0, utils_1.ns)(`${db}.$cmd`), retrySaslContinueCmd, undefined, callback);
    });
}
function parsePayload(payload) {
    const dict = {};
    const parts = payload.split(',');
    for (let i = 0; i < parts.length; i++) {
        const valueParts = parts[i].split('=');
        dict[valueParts[0]] = valueParts[1];
    }
    return dict;
}
function passwordDigest(username, password) {
    if (typeof username !== 'string') {
        throw new error_1.MongoInvalidArgumentError('Username must be a string');
    }
    if (typeof password !== 'string') {
        throw new error_1.MongoInvalidArgumentError('Password must be a string');
    }
    if (password.length === 0) {
        throw new error_1.MongoInvalidArgumentError('Password cannot be empty');
    }
    let md5;
    try {
        md5 = crypto.createHash('md5');
    }
    catch (err) {
        if (crypto.getFips()) {
            // This error is (slightly) more helpful than what comes from OpenSSL directly, e.g.
            // 'Error: error:060800C8:digital envelope routines:EVP_DigestInit_ex:disabled for FIPS'
            throw new Error('Auth mechanism SCRAM-SHA-1 is not supported in FIPS mode');
        }
        throw err;
    }
    md5.update(`${username}:mongo:${password}`, 'utf8');
    return md5.digest('hex');
}
// XOR two buffers
function xor(a, b) {
    if (!Buffer.isBuffer(a)) {
        a = Buffer.from(a);
    }
    if (!Buffer.isBuffer(b)) {
        b = Buffer.from(b);
    }
    const length = Math.max(a.length, b.length);
    const res = [];
    for (let i = 0; i < length; i += 1) {
        res.push(a[i] ^ b[i]);
    }
    return Buffer.from(res).toString('base64');
}
function H(method, text) {
    return crypto.createHash(method).update(text).digest();
}
function HMAC(method, key, text) {
    return crypto.createHmac(method, key).update(text).digest();
}
let _hiCache = {};
let _hiCacheCount = 0;
function _hiCachePurge() {
    _hiCache = {};
    _hiCacheCount = 0;
}
const hiLengthMap = {
    sha256: 32,
    sha1: 20
};
function HI(data, salt, iterations, cryptoMethod) {
    // omit the work if already generated
    const key = [data, salt.toString('base64'), iterations].join('_');
    if (_hiCache[key] != null) {
        return _hiCache[key];
    }
    // generate the salt
    const saltedData = crypto.pbkdf2Sync(data, salt, iterations, hiLengthMap[cryptoMethod], cryptoMethod);
    // cache a copy to speed up the next lookup, but prevent unbounded cache growth
    if (_hiCacheCount >= 200) {
        _hiCachePurge();
    }
    _hiCache[key] = saltedData;
    _hiCacheCount += 1;
    return saltedData;
}
function compareDigest(lhs, rhs) {
    if (lhs.length !== rhs.length) {
        return false;
    }
    if (typeof crypto.timingSafeEqual === 'function') {
        return crypto.timingSafeEqual(lhs, rhs);
    }
    let result = 0;
    for (let i = 0; i < lhs.length; i++) {
        result |= lhs[i] ^ rhs[i];
    }
    return result === 0;
}
function resolveError(err, result) {
    if (err)
        return err;
    if (result) {
        if (result.$err || result.errmsg)
            return new error_1.MongoServerError(result);
    }
    return;
}
class ScramSHA1 extends ScramSHA {
    constructor() {
        super('sha1');
    }
}
exports.ScramSHA1 = ScramSHA1;
class ScramSHA256 extends ScramSHA {
    constructor() {
        super('sha256');
    }
}
exports.ScramSHA256 = ScramSHA256;
//# sourceMappingURL=scram.js.mapPK�����O[E���������auth/mongocr.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MongoCR = void 0;
const crypto = require("crypto");
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const auth_provider_1 = require("./auth_provider");
class MongoCR extends auth_provider_1.AuthProvider {
    auth(authContext, callback) {
        const { connection, credentials } = authContext;
        if (!credentials) {
            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
        }
        const username = credentials.username;
        const password = credentials.password;
        const source = credentials.source;
        connection.command((0, utils_1.ns)(`${source}.$cmd`), { getnonce: 1 }, undefined, (err, r) => {
            let nonce = null;
            let key = null;
            // Get nonce
            if (err == null) {
                nonce = r.nonce;
                // Use node md5 generator
                let md5 = crypto.createHash('md5');
                // Generate keys used for authentication
                md5.update(`${username}:mongo:${password}`, 'utf8');
                const hash_password = md5.digest('hex');
                // Final key
                md5 = crypto.createHash('md5');
                md5.update(nonce + username + hash_password, 'utf8');
                key = md5.digest('hex');
            }
            const authenticateCommand = {
                authenticate: 1,
                user: username,
                nonce,
                key
            };
            connection.command((0, utils_1.ns)(`${source}.$cmd`), authenticateCommand, undefined, callback);
        });
    }
}
exports.MongoCR = MongoCR;
//# sourceMappingURL=mongocr.js.mapPK�����O[�s�8��������auth/gssapi.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveCname = exports.performGSSAPICanonicalizeHostName = exports.GSSAPI = exports.GSSAPICanonicalizationValue = void 0;
const dns = require("dns");
const deps_1 = require("../../deps");
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const auth_provider_1 = require("./auth_provider");
/** @public */
exports.GSSAPICanonicalizationValue = Object.freeze({
    on: true,
    off: false,
    none: 'none',
    forward: 'forward',
    forwardAndReverse: 'forwardAndReverse'
});
class GSSAPI extends auth_provider_1.AuthProvider {
    auth(authContext, callback) {
        const { connection, credentials } = authContext;
        if (credentials == null)
            return callback(new error_1.MongoMissingCredentialsError('Credentials required for GSSAPI authentication'));
        const { username } = credentials;
        function externalCommand(command, cb) {
            return connection.command((0, utils_1.ns)('$external.$cmd'), command, undefined, cb);
        }
        makeKerberosClient(authContext, (err, client) => {
            if (err)
                return callback(err);
            if (client == null)
                return callback(new error_1.MongoMissingDependencyError('GSSAPI client missing'));
            client.step('', (err, payload) => {
                if (err)
                    return callback(err);
                externalCommand(saslStart(payload), (err, result) => {
                    if (err)
                        return callback(err);
                    if (result == null)
                        return callback();
                    negotiate(client, 10, result.payload, (err, payload) => {
                        if (err)
                            return callback(err);
                        externalCommand(saslContinue(payload, result.conversationId), (err, result) => {
                            if (err)
                                return callback(err);
                            if (result == null)
                                return callback();
                            finalize(client, username, result.payload, (err, payload) => {
                                if (err)
                                    return callback(err);
                                externalCommand({
                                    saslContinue: 1,
                                    conversationId: result.conversationId,
                                    payload
                                }, (err, result) => {
                                    if (err)
                                        return callback(err);
                                    callback(undefined, result);
                                });
                            });
                        });
                    });
                });
            });
        });
    }
}
exports.GSSAPI = GSSAPI;
function makeKerberosClient(authContext, callback) {
    var _a;
    const { hostAddress } = authContext.options;
    const { credentials } = authContext;
    if (!hostAddress || typeof hostAddress.host !== 'string' || !credentials) {
        return callback(new error_1.MongoInvalidArgumentError('Connection must have host and port and credentials defined.'));
    }
    if ('kModuleError' in deps_1.Kerberos) {
        return callback(deps_1.Kerberos['kModuleError']);
    }
    const { initializeClient } = deps_1.Kerberos;
    const { username, password } = credentials;
    const mechanismProperties = credentials.mechanismProperties;
    const serviceName = (_a = mechanismProperties.SERVICE_NAME) !== null && _a !== void 0 ? _a : 'mongodb';
    performGSSAPICanonicalizeHostName(hostAddress.host, mechanismProperties, (err, host) => {
        var _a;
        if (err)
            return callback(err);
        const initOptions = {};
        if (password != null) {
            Object.assign(initOptions, { user: username, password: password });
        }
        const spnHost = (_a = mechanismProperties.SERVICE_HOST) !== null && _a !== void 0 ? _a : host;
        let spn = `${serviceName}${process.platform === 'win32' ? '/' : '@'}${spnHost}`;
        if ('SERVICE_REALM' in mechanismProperties) {
            spn = `${spn}@${mechanismProperties.SERVICE_REALM}`;
        }
        initializeClient(spn, initOptions, (err, client) => {
            // TODO(NODE-3483)
            if (err)
                return callback(new error_1.MongoRuntimeError(err));
            callback(undefined, client);
        });
    });
}
function saslStart(payload) {
    return {
        saslStart: 1,
        mechanism: 'GSSAPI',
        payload,
        autoAuthorize: 1
    };
}
function saslContinue(payload, conversationId) {
    return {
        saslContinue: 1,
        conversationId,
        payload
    };
}
function negotiate(client, retries, payload, callback) {
    client.step(payload, (err, response) => {
        // Retries exhausted, raise error
        if (err && retries === 0)
            return callback(err);
        // Adjust number of retries and call step again
        if (err)
            return negotiate(client, retries - 1, payload, callback);
        // Return the payload
        callback(undefined, response || '');
    });
}
function finalize(client, user, payload, callback) {
    // GSS Client Unwrap
    client.unwrap(payload, (err, response) => {
        if (err)
            return callback(err);
        // Wrap the response
        client.wrap(response || '', { user }, (err, wrapped) => {
            if (err)
                return callback(err);
            // Return the payload
            callback(undefined, wrapped);
        });
    });
}
function performGSSAPICanonicalizeHostName(host, mechanismProperties, callback) {
    const mode = mechanismProperties.CANONICALIZE_HOST_NAME;
    if (!mode || mode === exports.GSSAPICanonicalizationValue.none) {
        return callback(undefined, host);
    }
    // If forward and reverse or true
    if (mode === exports.GSSAPICanonicalizationValue.on ||
        mode === exports.GSSAPICanonicalizationValue.forwardAndReverse) {
        // Perform the lookup of the ip address.
        dns.lookup(host, (error, address) => {
            // No ip found, return the error.
            if (error)
                return callback(error);
            // Perform a reverse ptr lookup on the ip address.
            dns.resolvePtr(address, (err, results) => {
                // This can error as ptr records may not exist for all ips. In this case
                // fallback to a cname lookup as dns.lookup() does not return the
                // cname.
                if (err) {
                    return resolveCname(host, callback);
                }
                // If the ptr did not error but had no results, return the host.
                callback(undefined, results.length > 0 ? results[0] : host);
            });
        });
    }
    else {
        // The case for forward is just to resolve the cname as dns.lookup()
        // will not return it.
        resolveCname(host, callback);
    }
}
exports.performGSSAPICanonicalizeHostName = performGSSAPICanonicalizeHostName;
function resolveCname(host, callback) {
    // Attempt to resolve the host name
    dns.resolveCname(host, (err, r) => {
        if (err)
            return callback(undefined, host);
        // Get the first resolve host id
        if (r.length > 0) {
            return callback(undefined, r[0]);
        }
        callback(undefined, host);
    });
}
exports.resolveCname = resolveCname;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.MongoCredentials = void 0;
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const gssapi_1 = require("./gssapi");
const providers_1 = require("./providers");
// https://github.com/mongodb/specifications/blob/master/source/auth/auth.rst
function getDefaultAuthMechanism(hello) {
    if (hello) {
        // If hello contains saslSupportedMechs, use scram-sha-256
        // if it is available, else scram-sha-1
        if (Array.isArray(hello.saslSupportedMechs)) {
            return hello.saslSupportedMechs.includes(providers_1.AuthMechanism.MONGODB_SCRAM_SHA256)
                ? providers_1.AuthMechanism.MONGODB_SCRAM_SHA256
                : providers_1.AuthMechanism.MONGODB_SCRAM_SHA1;
        }
        // Fallback to legacy selection method. If wire version >= 3, use scram-sha-1
        if (hello.maxWireVersion >= 3) {
            return providers_1.AuthMechanism.MONGODB_SCRAM_SHA1;
        }
    }
    // Default for wireprotocol < 3
    return providers_1.AuthMechanism.MONGODB_CR;
}
/**
 * A representation of the credentials used by MongoDB
 * @public
 */
class MongoCredentials {
    constructor(options) {
        this.username = options.username;
        this.password = options.password;
        this.source = options.source;
        if (!this.source && options.db) {
            this.source = options.db;
        }
        this.mechanism = options.mechanism || providers_1.AuthMechanism.MONGODB_DEFAULT;
        this.mechanismProperties = options.mechanismProperties || {};
        if (this.mechanism.match(/MONGODB-AWS/i)) {
            if (!this.username && process.env.AWS_ACCESS_KEY_ID) {
                this.username = process.env.AWS_ACCESS_KEY_ID;
            }
            if (!this.password && process.env.AWS_SECRET_ACCESS_KEY) {
                this.password = process.env.AWS_SECRET_ACCESS_KEY;
            }
            if (this.mechanismProperties.AWS_SESSION_TOKEN == null &&
                process.env.AWS_SESSION_TOKEN != null) {
                this.mechanismProperties = {
                    ...this.mechanismProperties,
                    AWS_SESSION_TOKEN: process.env.AWS_SESSION_TOKEN
                };
            }
        }
        if ('gssapiCanonicalizeHostName' in this.mechanismProperties) {
            (0, utils_1.emitWarningOnce)('gssapiCanonicalizeHostName is deprecated. Please use CANONICALIZE_HOST_NAME instead.');
            this.mechanismProperties.CANONICALIZE_HOST_NAME =
                this.mechanismProperties.gssapiCanonicalizeHostName;
        }
        Object.freeze(this.mechanismProperties);
        Object.freeze(this);
    }
    /** Determines if two MongoCredentials objects are equivalent */
    equals(other) {
        return (this.mechanism === other.mechanism &&
            this.username === other.username &&
            this.password === other.password &&
            this.source === other.source);
    }
    /**
     * If the authentication mechanism is set to "default", resolves the authMechanism
     * based on the server version and server supported sasl mechanisms.
     *
     * @param hello - A hello response from the server
     */
    resolveAuthMechanism(hello) {
        // If the mechanism is not "default", then it does not need to be resolved
        if (this.mechanism.match(/DEFAULT/i)) {
            return new MongoCredentials({
                username: this.username,
                password: this.password,
                source: this.source,
                mechanism: getDefaultAuthMechanism(hello),
                mechanismProperties: this.mechanismProperties
            });
        }
        return this;
    }
    validate() {
        var _a;
        if ((this.mechanism === providers_1.AuthMechanism.MONGODB_GSSAPI ||
            this.mechanism === providers_1.AuthMechanism.MONGODB_CR ||
            this.mechanism === providers_1.AuthMechanism.MONGODB_PLAIN ||
            this.mechanism === providers_1.AuthMechanism.MONGODB_SCRAM_SHA1 ||
            this.mechanism === providers_1.AuthMechanism.MONGODB_SCRAM_SHA256) &&
            !this.username) {
            throw new error_1.MongoMissingCredentialsError(`Username required for mechanism '${this.mechanism}'`);
        }
        if (providers_1.AUTH_MECHS_AUTH_SRC_EXTERNAL.has(this.mechanism)) {
            if (this.source != null && this.source !== '$external') {
                // TODO(NODE-3485): Replace this with a MongoAuthValidationError
                throw new error_1.MongoAPIError(`Invalid source '${this.source}' for mechanism '${this.mechanism}' specified.`);
            }
        }
        if (this.mechanism === providers_1.AuthMechanism.MONGODB_PLAIN && this.source == null) {
            // TODO(NODE-3485): Replace this with a MongoAuthValidationError
            throw new error_1.MongoAPIError('PLAIN Authentication Mechanism needs an auth source');
        }
        if (this.mechanism === providers_1.AuthMechanism.MONGODB_X509 && this.password != null) {
            if (this.password === '') {
                Reflect.set(this, 'password', undefined);
                return;
            }
            // TODO(NODE-3485): Replace this with a MongoAuthValidationError
            throw new error_1.MongoAPIError(`Password not allowed for mechanism MONGODB-X509`);
        }
        const canonicalization = (_a = this.mechanismProperties.CANONICALIZE_HOST_NAME) !== null && _a !== void 0 ? _a : false;
        if (!Object.values(gssapi_1.GSSAPICanonicalizationValue).includes(canonicalization)) {
            throw new error_1.MongoAPIError(`Invalid CANONICALIZE_HOST_NAME value: ${canonicalization}`);
        }
    }
    static merge(creds, options) {
        var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k, _l;
        return new MongoCredentials({
            username: (_b = (_a = options.username) !== null && _a !== void 0 ? _a : creds === null || creds === void 0 ? void 0 : creds.username) !== null && _b !== void 0 ? _b : '',
            password: (_d = (_c = options.password) !== null && _c !== void 0 ? _c : creds === null || creds === void 0 ? void 0 : creds.password) !== null && _d !== void 0 ? _d : '',
            mechanism: (_f = (_e = options.mechanism) !== null && _e !== void 0 ? _e : creds === null || creds === void 0 ? void 0 : creds.mechanism) !== null && _f !== void 0 ? _f : providers_1.AuthMechanism.MONGODB_DEFAULT,
            mechanismProperties: (_h = (_g = options.mechanismProperties) !== null && _g !== void 0 ? _g : creds === null || creds === void 0 ? void 0 : creds.mechanismProperties) !== null && _h !== void 0 ? _h : {},
            source: (_l = (_k = (_j = options.source) !== null && _j !== void 0 ? _j : options.db) !== null && _k !== void 0 ? _k : creds === null || creds === void 0 ? void 0 : creds.source) !== null && _l !== void 0 ? _l : 'admin'
        });
    }
}
exports.MongoCredentials = MongoCredentials;
//# sourceMappingURL=mongo_credentials.js.mapPK�����O[U"u/��������auth/x509.js.mapnu�ȯ����������{"version":3,"file":"x509.js","sourceRoot":"","sources":["../../../src/cmap/auth/x509.ts"],"names":[],"mappings":";;;AACA,uCAA2D;AAC3D,uCAA2C;AAE3C,mDAA4D;AAG5D,MAAa,IAAK,SAAQ,4BAAY;IAC3B,OAAO,CACd,YAA+B,EAC/B,WAAwB,EACxB,QAAkB;QAElB,MAAM,EAAE,WAAW,EAAE,GAAG,WAAW,CAAC;QACpC,IAAI,CAAC,WAAW,EAAE;YAChB,OAAO,QAAQ,CAAC,IAAI,oCAA4B,CAAC,uCAAuC,CAAC,CAAC,CAAC;SAC5F;QACD,MAAM,CAAC,MAAM,CAAC,YAAY,EAAE;YAC1B,uBAAuB,EAAE,uBAAuB,CAAC,WAAW,CAAC;SAC9D,CAAC,CAAC;QAEH,QAAQ,CAAC,SAAS,EAAE,YAAY,CAAC,CAAC;IACpC,CAAC;IAEQ,IAAI,CAAC,WAAwB,EAAE,QAAkB;QACxD,MAAM,UAAU,GAAG,WAAW,CAAC,UAAU,CAAC;QAC1C,MAAM,WAAW,GAAG,WAAW,CAAC,WAAW,CAAC;QAC5C,IAAI,CAAC,WAAW,EAAE;YAChB,OAAO,QAAQ,CAAC,IAAI,oCAA4B,CAAC,uCAAuC,CAAC,CAAC,CAAC;SAC5F;QACD,MAAM,QAAQ,GAAG,WAAW,CAAC,QAAQ,CAAC;QAEtC,IAAI,QAAQ,IAAI,QAAQ,CAAC,uBAAuB,EAAE;YAChD,OAAO,QAAQ,EAAE,CAAC;SACnB;QAED,UAAU,CAAC,OAAO,CAChB,IAAA,UAAE,EAAC,gBAAgB,CAAC,EACpB,uBAAuB,CAAC,WAAW,CAAC,EACpC,SAAS,EACT,QAAQ,CACT,CAAC;IACJ,CAAC;CACF;AApCD,oBAoCC;AAED,SAAS,uBAAuB,CAAC,WAA6B;IAC5D,MAAM,OAAO,GAAa,EAAE,YAAY,EAAE,CAAC,EAAE,SAAS,EAAE,cAAc,EAAE,CAAC;IACzE,IAAI,WAAW,CAAC,QAAQ,EAAE;QACxB,OAAO,CAAC,IAAI,GAAG,WAAW,CAAC,QAAQ,CAAC;KACrC;IAED,OAAO,OAAO,CAAC;AACjB,CAAC"}PK�����O[�
���������auth/auth_provider.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.AuthProvider = exports.AuthContext = void 0;
const error_1 = require("../../error");
/** Context used during authentication */
class AuthContext {
    constructor(connection, credentials, options) {
        this.connection = connection;
        this.credentials = credentials;
        this.options = options;
    }
}
exports.AuthContext = AuthContext;
class AuthProvider {
    /**
     * Prepare the handshake document before the initial handshake.
     *
     * @param handshakeDoc - The document used for the initial handshake on a connection
     * @param authContext - Context for authentication flow
     */
    prepare(handshakeDoc, authContext, callback) {
        callback(undefined, handshakeDoc);
    }
    /**
     * Authenticate
     *
     * @param context - A shared context for authentication flow
     * @param callback - The callback to return the result from the authentication
     */
    auth(context, callback) {
        // TODO(NODE-3483): Replace this with MongoMethodOverrideError
        callback(new error_1.MongoRuntimeError('`auth` method must be overridden by subclass'));
    }
}
exports.AuthProvider = AuthProvider;
//# sourceMappingURL=auth_provider.js.mapPK�����O[q�_>������auth/plain.js.mapnu�ȯ����������{"version":3,"file":"plain.js","sourceRoot":"","sources":["../../../src/cmap/auth/plain.ts"],"names":[],"mappings":";;;AAAA,qCAAoC;AACpC,uCAA2D;AAC3D,uCAA2C;AAC3C,mDAA4D;AAE5D,MAAa,KAAM,SAAQ,4BAAY;IAC5B,IAAI,CAAC,WAAwB,EAAE,QAAkB;QACxD,MAAM,EAAE,UAAU,EAAE,WAAW,EAAE,GAAG,WAAW,CAAC;QAChD,IAAI,CAAC,WAAW,EAAE;YAChB,OAAO,QAAQ,CAAC,IAAI,oCAA4B,CAAC,uCAAuC,CAAC,CAAC,CAAC;SAC5F;QACD,MAAM,QAAQ,GAAG,WAAW,CAAC,QAAQ,CAAC;QACtC,MAAM,QAAQ,GAAG,WAAW,CAAC,QAAQ,CAAC;QAEtC,MAAM,OAAO,GAAG,IAAI,aAAM,CAAC,MAAM,CAAC,IAAI,CAAC,OAAO,QAAQ,OAAO,QAAQ,EAAE,CAAC,CAAC,CAAC;QAC1E,MAAM,OAAO,GAAG;YACd,SAAS,EAAE,CAAC;YACZ,SAAS,EAAE,OAAO;YAClB,OAAO,EAAE,OAAO;YAChB,aAAa,EAAE,CAAC;SACjB,CAAC;QAEF,UAAU,CAAC,OAAO,CAAC,IAAA,UAAE,EAAC,gBAAgB,CAAC,EAAE,OAAO,EAAE,SAAS,EAAE,QAAQ,CAAC,CAAC;IACzE,CAAC;CACF;AAnBD,sBAmBC"}PK�����O[�#��"��"��
��auth/plain.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Plain = void 0;
const bson_1 = require("../../bson");
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const auth_provider_1 = require("./auth_provider");
class Plain extends auth_provider_1.AuthProvider {
    auth(authContext, callback) {
        const { connection, credentials } = authContext;
        if (!credentials) {
            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
        }
        const username = credentials.username;
        const password = credentials.password;
        const payload = new bson_1.Binary(Buffer.from(`\x00${username}\x00${password}`));
        const command = {
            saslStart: 1,
            mechanism: 'PLAIN',
            payload: payload,
            autoAuthorize: 1
        };
        connection.command((0, utils_1.ns)('$external.$cmd'), command, undefined, callback);
    }
}
exports.Plain = Plain;
//# 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strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MongoDBAWS = void 0;
const crypto = require("crypto");
const http = require("http");
const url = require("url");
const BSON = require("../../bson");
const deps_1 = require("../../deps");
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const auth_provider_1 = require("./auth_provider");
const mongo_credentials_1 = require("./mongo_credentials");
const providers_1 = require("./providers");
const ASCII_N = 110;
const AWS_RELATIVE_URI = 'http://169.254.170.2';
const AWS_EC2_URI = 'http://169.254.169.254';
const AWS_EC2_PATH = '/latest/meta-data/iam/security-credentials';
const bsonOptions = {
    promoteLongs: true,
    promoteValues: true,
    promoteBuffers: false,
    bsonRegExp: false
};
class MongoDBAWS extends auth_provider_1.AuthProvider {
    auth(authContext, callback) {
        const { connection, credentials } = authContext;
        if (!credentials) {
            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
        }
        if ('kModuleError' in deps_1.aws4) {
            return callback(deps_1.aws4['kModuleError']);
        }
        const { sign } = deps_1.aws4;
        if ((0, utils_1.maxWireVersion)(connection) < 9) {
            callback(new error_1.MongoCompatibilityError('MONGODB-AWS authentication requires MongoDB version 4.4 or later'));
            return;
        }
        if (!credentials.username) {
            makeTempCredentials(credentials, (err, tempCredentials) => {
                if (err || !tempCredentials)
                    return callback(err);
                authContext.credentials = tempCredentials;
                this.auth(authContext, callback);
            });
            return;
        }
        const accessKeyId = credentials.username;
        const secretAccessKey = credentials.password;
        const sessionToken = credentials.mechanismProperties.AWS_SESSION_TOKEN;
        // If all three defined, include sessionToken, else include username and pass, else no credentials
        const awsCredentials = accessKeyId && secretAccessKey && sessionToken
            ? { accessKeyId, secretAccessKey, sessionToken }
            : accessKeyId && secretAccessKey
                ? { accessKeyId, secretAccessKey }
                : undefined;
        const db = credentials.source;
        crypto.randomBytes(32, (err, nonce) => {
            if (err) {
                callback(err);
                return;
            }
            const saslStart = {
                saslStart: 1,
                mechanism: 'MONGODB-AWS',
                payload: BSON.serialize({ r: nonce, p: ASCII_N }, bsonOptions)
            };
            connection.command((0, utils_1.ns)(`${db}.$cmd`), saslStart, undefined, (err, res) => {
                if (err)
                    return callback(err);
                const serverResponse = BSON.deserialize(res.payload.buffer, bsonOptions);
                const host = serverResponse.h;
                const serverNonce = serverResponse.s.buffer;
                if (serverNonce.length !== 64) {
                    callback(
                    // TODO(NODE-3483)
                    new error_1.MongoRuntimeError(`Invalid server nonce length ${serverNonce.length}, expected 64`));
                    return;
                }
                if (serverNonce.compare(nonce, 0, nonce.length, 0, nonce.length) !== 0) {
                    // TODO(NODE-3483)
                    callback(new error_1.MongoRuntimeError('Server nonce does not begin with client nonce'));
                    return;
                }
                if (host.length < 1 || host.length > 255 || host.indexOf('..') !== -1) {
                    // TODO(NODE-3483)
                    callback(new error_1.MongoRuntimeError(`Server returned an invalid host: "${host}"`));
                    return;
                }
                const body = 'Action=GetCallerIdentity&Version=2011-06-15';
                const options = sign({
                    method: 'POST',
                    host,
                    region: deriveRegion(serverResponse.h),
                    service: 'sts',
                    headers: {
                        'Content-Type': 'application/x-www-form-urlencoded',
                        'Content-Length': body.length,
                        'X-MongoDB-Server-Nonce': serverNonce.toString('base64'),
                        'X-MongoDB-GS2-CB-Flag': 'n'
                    },
                    path: '/',
                    body
                }, awsCredentials);
                const payload = {
                    a: options.headers.Authorization,
                    d: options.headers['X-Amz-Date']
                };
                if (sessionToken) {
                    payload.t = sessionToken;
                }
                const saslContinue = {
                    saslContinue: 1,
                    conversationId: 1,
                    payload: BSON.serialize(payload, bsonOptions)
                };
                connection.command((0, utils_1.ns)(`${db}.$cmd`), saslContinue, undefined, callback);
            });
        });
    }
}
exports.MongoDBAWS = MongoDBAWS;
function makeTempCredentials(credentials, callback) {
    function done(creds) {
        if (!creds.AccessKeyId || !creds.SecretAccessKey || !creds.Token) {
            callback(new error_1.MongoMissingCredentialsError('Could not obtain temporary MONGODB-AWS credentials'));
            return;
        }
        callback(undefined, new mongo_credentials_1.MongoCredentials({
            username: creds.AccessKeyId,
            password: creds.SecretAccessKey,
            source: credentials.source,
            mechanism: providers_1.AuthMechanism.MONGODB_AWS,
            mechanismProperties: {
                AWS_SESSION_TOKEN: creds.Token
            }
        }));
    }
    const credentialProvider = (0, deps_1.getAwsCredentialProvider)();
    // Check if the AWS credential provider from the SDK is present. If not,
    // use the old method.
    if ('kModuleError' in credentialProvider) {
        // If the environment variable AWS_CONTAINER_CREDENTIALS_RELATIVE_URI
        // is set then drivers MUST assume that it was set by an AWS ECS agent
        if (process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI) {
            request(`${AWS_RELATIVE_URI}${process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI}`, undefined, (err, res) => {
                if (err)
                    return callback(err);
                done(res);
            });
            return;
        }
        // Otherwise assume we are on an EC2 instance
        // get a token
        request(`${AWS_EC2_URI}/latest/api/token`, { method: 'PUT', json: false, headers: { 'X-aws-ec2-metadata-token-ttl-seconds': 30 } }, (err, token) => {
            if (err)
                return callback(err);
            // get role name
            request(`${AWS_EC2_URI}/${AWS_EC2_PATH}`, { json: false, headers: { 'X-aws-ec2-metadata-token': token } }, (err, roleName) => {
                if (err)
                    return callback(err);
                // get temp credentials
                request(`${AWS_EC2_URI}/${AWS_EC2_PATH}/${roleName}`, { headers: { 'X-aws-ec2-metadata-token': token } }, (err, creds) => {
                    if (err)
                        return callback(err);
                    done(creds);
                });
            });
        });
    }
    else {
        /*
         * Creates a credential provider that will attempt to find credentials from the
         * following sources (listed in order of precedence):
         *
         * - Environment variables exposed via process.env
         * - SSO credentials from token cache
         * - Web identity token credentials
         * - Shared credentials and config ini files
         * - The EC2/ECS Instance Metadata Service
         */
        const { fromNodeProviderChain } = credentialProvider;
        const provider = fromNodeProviderChain();
        provider()
            .then((creds) => {
            done({
                AccessKeyId: creds.accessKeyId,
                SecretAccessKey: creds.secretAccessKey,
                Token: creds.sessionToken,
                Expiration: creds.expiration
            });
        })
            .catch((error) => {
            callback(new error_1.MongoAWSError(error.message));
        });
    }
}
function deriveRegion(host) {
    const parts = host.split('.');
    if (parts.length === 1 || parts[1] === 'amazonaws') {
        return 'us-east-1';
    }
    return parts[1];
}
function request(uri, _options, callback) {
    const options = Object.assign({
        method: 'GET',
        timeout: 10000,
        json: true
    }, url.parse(uri), _options);
    const req = http.request(options, res => {
        res.setEncoding('utf8');
        let data = '';
        res.on('data', d => (data += d));
        res.on('end', () => {
            if (options.json === false) {
                callback(undefined, data);
                return;
            }
            try {
                const parsed = JSON.parse(data);
                callback(undefined, parsed);
            }
            catch (err) {
                // TODO(NODE-3483)
                callback(new error_1.MongoRuntimeError(`Invalid JSON response: "${data}"`));
            }
        });
    });
    req.on('timeout', () => {
        req.destroy(new error_1.MongoAWSError(`AWS request to ${uri} timed out after ${options.timeout} ms`));
    });
    req.on('error', err => callback(err));
    req.end();
}
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strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.X509 = void 0;
const error_1 = require("../../error");
const utils_1 = require("../../utils");
const auth_provider_1 = require("./auth_provider");
class X509 extends auth_provider_1.AuthProvider {
    prepare(handshakeDoc, authContext, callback) {
        const { credentials } = authContext;
        if (!credentials) {
            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
        }
        Object.assign(handshakeDoc, {
            speculativeAuthenticate: x509AuthenticateCommand(credentials)
        });
        callback(undefined, handshakeDoc);
    }
    auth(authContext, callback) {
        const connection = authContext.connection;
        const credentials = authContext.credentials;
        if (!credentials) {
            return callback(new error_1.MongoMissingCredentialsError('AuthContext must provide credentials.'));
        }
        const response = authContext.response;
        if (response && response.speculativeAuthenticate) {
            return callback();
        }
        connection.command((0, utils_1.ns)('$external.$cmd'), x509AuthenticateCommand(credentials), undefined, callback);
    }
}
exports.X509 = X509;
function x509AuthenticateCommand(credentials) {
    const command = { authenticate: 1, mechanism: 'MONGODB-X509' };
    if (credentials.username) {
        command.user = credentials.username;
    }
    return command;
}
//# sourceMappingURL=x509.js.mapPK�����O[~�K�����	��errors.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.WaitQueueTimeoutError = exports.PoolClearedError = exports.PoolClosedError = void 0;
const error_1 = require("../error");
/**
 * An error indicating a connection pool is closed
 * @category Error
 */
class PoolClosedError extends error_1.MongoDriverError {
    constructor(pool) {
        super('Attempted to check out a connection from closed connection pool');
        this.address = pool.address;
    }
    get name() {
        return 'MongoPoolClosedError';
    }
}
exports.PoolClosedError = PoolClosedError;
/**
 * An error indicating a connection pool is currently paused
 * @category Error
 */
class PoolClearedError extends error_1.MongoNetworkError {
    constructor(pool) {
        var _a;
        super(`Connection pool for ${pool.address} was cleared because another operation failed with: "${(_a = pool.serverError) === null || _a === void 0 ? void 0 : _a.message}"`);
        this.address = pool.address;
    }
    get name() {
        return 'MongoPoolClearedError';
    }
}
exports.PoolClearedError = PoolClearedError;
/**
 * An error thrown when a request to check out a connection times out
 * @category Error
 */
class WaitQueueTimeoutError extends error_1.MongoDriverError {
    constructor(message, address) {
        super(message);
        this.address = address;
    }
    get name() {
        return 'MongoWaitQueueTimeoutError';
    }
}
exports.WaitQueueTimeoutError = WaitQueueTimeoutError;
//# sourceMappingURL=errors.js.mapPK�����O[�u11��1��
��errors.js.mapnu�ȯ����������{"version":3,"file":"errors.js","sourceRoot":"","sources":["../../src/cmap/errors.ts"],"names":[],"mappings":";;;AAAA,oCAA+D;AAG/D;;;GAGG;AACH,MAAa,eAAgB,SAAQ,wBAAgB;IAInD,YAAY,IAAoB;QAC9B,KAAK,CAAC,iEAAiE,CAAC,CAAC;QACzE,IAAI,CAAC,OAAO,GAAG,IAAI,CAAC,OAAO,CAAC;IAC9B,CAAC;IAED,IAAa,IAAI;QACf,OAAO,sBAAsB,CAAC;IAChC,CAAC;CACF;AAZD,0CAYC;AAED;;;GAGG;AACH,MAAa,gBAAiB,SAAQ,yBAAiB;IAIrD,YAAY,IAAoB;;QAC9B,KAAK,CACH,uBAAuB,IAAI,CAAC,OAAO,wDAAwD,MAAA,IAAI,CAAC,WAAW,0CAAE,OAAO,GAAG,CACxH,CAAC;QACF,IAAI,CAAC,OAAO,GAAG,IAAI,CAAC,OAAO,CAAC;IAC9B,CAAC;IAED,IAAa,IAAI;QACf,OAAO,uBAAuB,CAAC;IACjC,CAAC;CACF;AAdD,4CAcC;AAED;;;GAGG;AACH,MAAa,qBAAsB,SAAQ,wBAAgB;IAIzD,YAAY,OAAe,EAAE,OAAe;QAC1C,KAAK,CAAC,OAAO,CAAC,CAAC;QACf,IAAI,CAAC,OAAO,GAAG,OAAO,CAAC;IACzB,CAAC;IAED,IAAa,IAAI;QACf,OAAO,4BAA4B,CAAC;IACtC,CAAC;CACF;AAZD,sDAYC"}PK�����O[������������stream_description.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.StreamDescription = void 0;
const common_1 = require("../sdam/common");
const server_description_1 = require("../sdam/server_description");
const RESPONSE_FIELDS = [
    'minWireVersion',
    'maxWireVersion',
    'maxBsonObjectSize',
    'maxMessageSizeBytes',
    'maxWriteBatchSize',
    'logicalSessionTimeoutMinutes'
];
/** @public */
class StreamDescription {
    constructor(address, options) {
        this.address = address;
        this.type = common_1.ServerType.Unknown;
        this.minWireVersion = undefined;
        this.maxWireVersion = undefined;
        this.maxBsonObjectSize = 16777216;
        this.maxMessageSizeBytes = 48000000;
        this.maxWriteBatchSize = 100000;
        this.logicalSessionTimeoutMinutes = options === null || options === void 0 ? void 0 : options.logicalSessionTimeoutMinutes;
        this.loadBalanced = !!(options === null || options === void 0 ? void 0 : options.loadBalanced);
        this.compressors =
            options && options.compressors && Array.isArray(options.compressors)
                ? options.compressors
                : [];
    }
    receiveResponse(response) {
        if (response == null) {
            return;
        }
        this.type = (0, server_description_1.parseServerType)(response);
        for (const field of RESPONSE_FIELDS) {
            if (response[field] != null) {
                this[field] = response[field];
            }
            // testing case
            if ('__nodejs_mock_server__' in response) {
                this.__nodejs_mock_server__ = response['__nodejs_mock_server__'];
            }
        }
        if (response.compression) {
            this.compressor = this.compressors.filter(c => { var _a; return (_a = response.compression) === null || _a === void 0 ? void 0 : _a.includes(c); })[0];
        }
    }
}
exports.StreamDescription = StreamDescription;
//# sourceMappingURL=stream_description.js.mapPK�����O[�U��=^��=^����connection_pool.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ConnectionPool = exports.PoolState = void 0;
const timers_1 = require("timers");
const constants_1 = require("../constants");
const error_1 = require("../error");
const logger_1 = require("../logger");
const mongo_types_1 = require("../mongo_types");
const utils_1 = require("../utils");
const connect_1 = require("./connect");
const connection_1 = require("./connection");
const connection_pool_events_1 = require("./connection_pool_events");
const errors_1 = require("./errors");
const metrics_1 = require("./metrics");
/** @internal */
const kServer = Symbol('server');
/** @internal */
const kLogger = Symbol('logger');
/** @internal */
const kConnections = Symbol('connections');
/** @internal */
const kPending = Symbol('pending');
/** @internal */
const kCheckedOut = Symbol('checkedOut');
/** @internal */
const kMinPoolSizeTimer = Symbol('minPoolSizeTimer');
/** @internal */
const kGeneration = Symbol('generation');
/** @internal */
const kServiceGenerations = Symbol('serviceGenerations');
/** @internal */
const kConnectionCounter = Symbol('connectionCounter');
/** @internal */
const kCancellationToken = Symbol('cancellationToken');
/** @internal */
const kWaitQueue = Symbol('waitQueue');
/** @internal */
const kCancelled = Symbol('cancelled');
/** @internal */
const kMetrics = Symbol('metrics');
/** @internal */
const kProcessingWaitQueue = Symbol('processingWaitQueue');
/** @internal */
const kPoolState = Symbol('poolState');
/** @internal */
exports.PoolState = Object.freeze({
    paused: 'paused',
    ready: 'ready',
    closed: 'closed'
});
/**
 * A pool of connections which dynamically resizes, and emit events related to pool activity
 * @internal
 */
class ConnectionPool extends mongo_types_1.TypedEventEmitter {
    constructor(server, options) {
        var _a, _b, _c, _d, _e, _f;
        super();
        this.options = Object.freeze({
            ...options,
            connectionType: connection_1.Connection,
            maxPoolSize: (_a = options.maxPoolSize) !== null && _a !== void 0 ? _a : 100,
            minPoolSize: (_b = options.minPoolSize) !== null && _b !== void 0 ? _b : 0,
            maxConnecting: (_c = options.maxConnecting) !== null && _c !== void 0 ? _c : 2,
            maxIdleTimeMS: (_d = options.maxIdleTimeMS) !== null && _d !== void 0 ? _d : 0,
            waitQueueTimeoutMS: (_e = options.waitQueueTimeoutMS) !== null && _e !== void 0 ? _e : 0,
            minPoolSizeCheckFrequencyMS: (_f = options.minPoolSizeCheckFrequencyMS) !== null && _f !== void 0 ? _f : 100,
            autoEncrypter: options.autoEncrypter,
            metadata: options.metadata
        });
        if (this.options.minPoolSize > this.options.maxPoolSize) {
            throw new error_1.MongoInvalidArgumentError('Connection pool minimum size must not be greater than maximum pool size');
        }
        this[kPoolState] = exports.PoolState.paused;
        this[kServer] = server;
        this[kLogger] = new logger_1.Logger('ConnectionPool');
        this[kConnections] = new utils_1.List();
        this[kPending] = 0;
        this[kCheckedOut] = new Set();
        this[kMinPoolSizeTimer] = undefined;
        this[kGeneration] = 0;
        this[kServiceGenerations] = new Map();
        this[kConnectionCounter] = (0, utils_1.makeCounter)(1);
        this[kCancellationToken] = new mongo_types_1.CancellationToken();
        this[kCancellationToken].setMaxListeners(Infinity);
        this[kWaitQueue] = new utils_1.List();
        this[kMetrics] = new metrics_1.ConnectionPoolMetrics();
        this[kProcessingWaitQueue] = false;
        process.nextTick(() => {
            this.emit(ConnectionPool.CONNECTION_POOL_CREATED, new connection_pool_events_1.ConnectionPoolCreatedEvent(this));
        });
    }
    /** The address of the endpoint the pool is connected to */
    get address() {
        return this.options.hostAddress.toString();
    }
    /**
     * Check if the pool has been closed
     *
     * TODO(NODE-3263): We can remove this property once shell no longer needs it
     */
    get closed() {
        return this[kPoolState] === exports.PoolState.closed;
    }
    /** An integer representing the SDAM generation of the pool */
    get generation() {
        return this[kGeneration];
    }
    /** An integer expressing how many total connections (available + pending + in use) the pool currently has */
    get totalConnectionCount() {
        return (this.availableConnectionCount + this.pendingConnectionCount + this.currentCheckedOutCount);
    }
    /** An integer expressing how many connections are currently available in the pool. */
    get availableConnectionCount() {
        return this[kConnections].length;
    }
    get pendingConnectionCount() {
        return this[kPending];
    }
    get currentCheckedOutCount() {
        return this[kCheckedOut].size;
    }
    get waitQueueSize() {
        return this[kWaitQueue].length;
    }
    get loadBalanced() {
        return this.options.loadBalanced;
    }
    get serviceGenerations() {
        return this[kServiceGenerations];
    }
    get serverError() {
        return this[kServer].description.error;
    }
    /**
     * This is exposed ONLY for use in mongosh, to enable
     * killing all connections if a user quits the shell with
     * operations in progress.
     *
     * This property may be removed as a part of NODE-3263.
     */
    get checkedOutConnections() {
        return this[kCheckedOut];
    }
    /**
     * Get the metrics information for the pool when a wait queue timeout occurs.
     */
    waitQueueErrorMetrics() {
        return this[kMetrics].info(this.options.maxPoolSize);
    }
    /**
     * Set the pool state to "ready"
     */
    ready() {
        if (this[kPoolState] !== exports.PoolState.paused) {
            return;
        }
        this[kPoolState] = exports.PoolState.ready;
        this.emit(ConnectionPool.CONNECTION_POOL_READY, new connection_pool_events_1.ConnectionPoolReadyEvent(this));
        (0, timers_1.clearTimeout)(this[kMinPoolSizeTimer]);
        this.ensureMinPoolSize();
    }
    /**
     * Check a connection out of this pool. The connection will continue to be tracked, but no reference to it
     * will be held by the pool. This means that if a connection is checked out it MUST be checked back in or
     * explicitly destroyed by the new owner.
     */
    checkOut(callback) {
        this.emit(ConnectionPool.CONNECTION_CHECK_OUT_STARTED, new connection_pool_events_1.ConnectionCheckOutStartedEvent(this));
        const waitQueueMember = { callback };
        const waitQueueTimeoutMS = this.options.waitQueueTimeoutMS;
        if (waitQueueTimeoutMS) {
            waitQueueMember.timer = (0, timers_1.setTimeout)(() => {
                waitQueueMember[kCancelled] = true;
                waitQueueMember.timer = undefined;
                this.emit(ConnectionPool.CONNECTION_CHECK_OUT_FAILED, new connection_pool_events_1.ConnectionCheckOutFailedEvent(this, 'timeout'));
                waitQueueMember.callback(new errors_1.WaitQueueTimeoutError(this.loadBalanced
                    ? this.waitQueueErrorMetrics()
                    : 'Timed out while checking out a connection from connection pool', this.address));
            }, waitQueueTimeoutMS);
        }
        this[kWaitQueue].push(waitQueueMember);
        process.nextTick(() => this.processWaitQueue());
    }
    /**
     * Check a connection into the pool.
     *
     * @param connection - The connection to check in
     */
    checkIn(connection) {
        const poolClosed = this.closed;
        const stale = this.connectionIsStale(connection);
        const willDestroy = !!(poolClosed || stale || connection.closed);
        if (!willDestroy) {
            connection.markAvailable();
            this[kConnections].unshift(connection);
        }
        this[kCheckedOut].delete(connection);
        this.emit(ConnectionPool.CONNECTION_CHECKED_IN, new connection_pool_events_1.ConnectionCheckedInEvent(this, connection));
        if (willDestroy) {
            const reason = connection.closed ? 'error' : poolClosed ? 'poolClosed' : 'stale';
            this.destroyConnection(connection, reason);
        }
        process.nextTick(() => this.processWaitQueue());
    }
    /**
     * Clear the pool
     *
     * Pool reset is handled by incrementing the pool's generation count. Any existing connection of a
     * previous generation will eventually be pruned during subsequent checkouts.
     */
    clear(serviceId) {
        if (this.closed) {
            return;
        }
        // handle load balanced case
        if (this.loadBalanced && serviceId) {
            const sid = serviceId.toHexString();
            const generation = this.serviceGenerations.get(sid);
            // Only need to worry if the generation exists, since it should
            // always be there but typescript needs the check.
            if (generation == null) {
                throw new error_1.MongoRuntimeError('Service generations are required in load balancer mode.');
            }
            else {
                // Increment the generation for the service id.
                this.serviceGenerations.set(sid, generation + 1);
            }
            this.emit(ConnectionPool.CONNECTION_POOL_CLEARED, new connection_pool_events_1.ConnectionPoolClearedEvent(this, { serviceId }));
            return;
        }
        // handle non load-balanced case
        this[kGeneration] += 1;
        const alreadyPaused = this[kPoolState] === exports.PoolState.paused;
        this[kPoolState] = exports.PoolState.paused;
        this.clearMinPoolSizeTimer();
        if (!alreadyPaused) {
            this.emit(ConnectionPool.CONNECTION_POOL_CLEARED, new connection_pool_events_1.ConnectionPoolClearedEvent(this));
        }
        this.processWaitQueue();
    }
    close(_options, _cb) {
        let options = _options;
        const callback = (_cb !== null && _cb !== void 0 ? _cb : _options);
        if (typeof options === 'function') {
            options = {};
        }
        options = Object.assign({ force: false }, options);
        if (this.closed) {
            return callback();
        }
        // immediately cancel any in-flight connections
        this[kCancellationToken].emit('cancel');
        // end the connection counter
        if (typeof this[kConnectionCounter].return === 'function') {
            this[kConnectionCounter].return(undefined);
        }
        this[kPoolState] = exports.PoolState.closed;
        this.clearMinPoolSizeTimer();
        this.processWaitQueue();
        (0, utils_1.eachAsync)(this[kConnections].toArray(), (conn, cb) => {
            this.emit(ConnectionPool.CONNECTION_CLOSED, new connection_pool_events_1.ConnectionClosedEvent(this, conn, 'poolClosed'));
            conn.destroy(options, cb);
        }, err => {
            this[kConnections].clear();
            this.emit(ConnectionPool.CONNECTION_POOL_CLOSED, new connection_pool_events_1.ConnectionPoolClosedEvent(this));
            callback(err);
        });
    }
    /**
     * Runs a lambda with an implicitly checked out connection, checking that connection back in when the lambda
     * has completed by calling back.
     *
     * NOTE: please note the required signature of `fn`
     *
     * @remarks When in load balancer mode, connections can be pinned to cursors or transactions.
     *   In these cases we pass the connection in to this method to ensure it is used and a new
     *   connection is not checked out.
     *
     * @param conn - A pinned connection for use in load balancing mode.
     * @param fn - A function which operates on a managed connection
     * @param callback - The original callback
     */
    withConnection(conn, fn, callback) {
        if (conn) {
            // use the provided connection, and do _not_ check it in after execution
            fn(undefined, conn, (fnErr, result) => {
                if (typeof callback === 'function') {
                    if (fnErr) {
                        callback(fnErr);
                    }
                    else {
                        callback(undefined, result);
                    }
                }
            });
            return;
        }
        this.checkOut((err, conn) => {
            // don't callback with `err` here, we might want to act upon it inside `fn`
            fn(err, conn, (fnErr, result) => {
                if (typeof callback === 'function') {
                    if (fnErr) {
                        callback(fnErr);
                    }
                    else {
                        callback(undefined, result);
                    }
                }
                if (conn) {
                    this.checkIn(conn);
                }
            });
        });
    }
    /** Clear the min pool size timer */
    clearMinPoolSizeTimer() {
        const minPoolSizeTimer = this[kMinPoolSizeTimer];
        if (minPoolSizeTimer) {
            (0, timers_1.clearTimeout)(minPoolSizeTimer);
        }
    }
    destroyConnection(connection, reason) {
        this.emit(ConnectionPool.CONNECTION_CLOSED, new connection_pool_events_1.ConnectionClosedEvent(this, connection, reason));
        // destroy the connection
        process.nextTick(() => connection.destroy());
    }
    connectionIsStale(connection) {
        const serviceId = connection.serviceId;
        if (this.loadBalanced && serviceId) {
            const sid = serviceId.toHexString();
            const generation = this.serviceGenerations.get(sid);
            return connection.generation !== generation;
        }
        return connection.generation !== this[kGeneration];
    }
    connectionIsIdle(connection) {
        return !!(this.options.maxIdleTimeMS && connection.idleTime > this.options.maxIdleTimeMS);
    }
    connectionIsPerished(connection) {
        const isStale = this.connectionIsStale(connection);
        const isIdle = this.connectionIsIdle(connection);
        if (!isStale && !isIdle && !connection.closed) {
            return false;
        }
        const reason = connection.closed ? 'error' : isStale ? 'stale' : 'idle';
        this.destroyConnection(connection, reason);
        return true;
    }
    createConnection(callback) {
        const connectOptions = {
            ...this.options,
            id: this[kConnectionCounter].next().value,
            generation: this[kGeneration],
            cancellationToken: this[kCancellationToken]
        };
        this[kPending]++;
        // This is our version of a "virtual" no-I/O connection as the spec requires
        this.emit(ConnectionPool.CONNECTION_CREATED, new connection_pool_events_1.ConnectionCreatedEvent(this, { id: connectOptions.id }));
        (0, connect_1.connect)(connectOptions, (err, connection) => {
            if (err || !connection) {
                this[kLogger].debug(`connection attempt failed with error [${JSON.stringify(err)}]`);
                this[kPending]--;
                this.emit(ConnectionPool.CONNECTION_CLOSED, new connection_pool_events_1.ConnectionClosedEvent(this, { id: connectOptions.id, serviceId: undefined }, 'error'));
                if (err instanceof error_1.MongoNetworkError || err instanceof error_1.MongoServerError) {
                    err.connectionGeneration = connectOptions.generation;
                }
                callback(err !== null && err !== void 0 ? err : new error_1.MongoRuntimeError('Connection creation failed without error'));
                return;
            }
            // The pool might have closed since we started trying to create a connection
            if (this[kPoolState] !== exports.PoolState.ready) {
                this[kPending]--;
                connection.destroy({ force: true });
                callback(this.closed ? new errors_1.PoolClosedError(this) : new errors_1.PoolClearedError(this));
                return;
            }
            // forward all events from the connection to the pool
            for (const event of [...constants_1.APM_EVENTS, connection_1.Connection.CLUSTER_TIME_RECEIVED]) {
                connection.on(event, (e) => this.emit(event, e));
            }
            if (this.loadBalanced) {
                connection.on(connection_1.Connection.PINNED, pinType => this[kMetrics].markPinned(pinType));
                connection.on(connection_1.Connection.UNPINNED, pinType => this[kMetrics].markUnpinned(pinType));
                const serviceId = connection.serviceId;
                if (serviceId) {
                    let generation;
                    const sid = serviceId.toHexString();
                    if ((generation = this.serviceGenerations.get(sid))) {
                        connection.generation = generation;
                    }
                    else {
                        this.serviceGenerations.set(sid, 0);
                        connection.generation = 0;
                    }
                }
            }
            connection.markAvailable();
            this.emit(ConnectionPool.CONNECTION_READY, new connection_pool_events_1.ConnectionReadyEvent(this, connection));
            this[kPending]--;
            callback(undefined, connection);
            return;
        });
    }
    ensureMinPoolSize() {
        const minPoolSize = this.options.minPoolSize;
        if (this[kPoolState] !== exports.PoolState.ready || minPoolSize === 0) {
            return;
        }
        this[kConnections].prune(connection => this.connectionIsPerished(connection));
        if (this.totalConnectionCount < minPoolSize &&
            this.pendingConnectionCount < this.options.maxConnecting) {
            // NOTE: ensureMinPoolSize should not try to get all the pending
            // connection permits because that potentially delays the availability of
            // the connection to a checkout request
            this.createConnection((err, connection) => {
                if (err) {
                    this[kServer].handleError(err);
                }
                if (!err && connection) {
                    this[kConnections].push(connection);
                    process.nextTick(() => this.processWaitQueue());
                }
                if (this[kPoolState] === exports.PoolState.ready) {
                    (0, timers_1.clearTimeout)(this[kMinPoolSizeTimer]);
                    this[kMinPoolSizeTimer] = (0, timers_1.setTimeout)(() => this.ensureMinPoolSize(), this.options.minPoolSizeCheckFrequencyMS);
                }
            });
        }
        else {
            (0, timers_1.clearTimeout)(this[kMinPoolSizeTimer]);
            this[kMinPoolSizeTimer] = (0, timers_1.setTimeout)(() => this.ensureMinPoolSize(), this.options.minPoolSizeCheckFrequencyMS);
        }
    }
    processWaitQueue() {
        if (this[kProcessingWaitQueue]) {
            return;
        }
        this[kProcessingWaitQueue] = true;
        while (this.waitQueueSize) {
            const waitQueueMember = this[kWaitQueue].first();
            if (!waitQueueMember) {
                this[kWaitQueue].shift();
                continue;
            }
            if (waitQueueMember[kCancelled]) {
                this[kWaitQueue].shift();
                continue;
            }
            if (this[kPoolState] !== exports.PoolState.ready) {
                const reason = this.closed ? 'poolClosed' : 'connectionError';
                const error = this.closed ? new errors_1.PoolClosedError(this) : new errors_1.PoolClearedError(this);
                this.emit(ConnectionPool.CONNECTION_CHECK_OUT_FAILED, new connection_pool_events_1.ConnectionCheckOutFailedEvent(this, reason));
                if (waitQueueMember.timer) {
                    (0, timers_1.clearTimeout)(waitQueueMember.timer);
                }
                this[kWaitQueue].shift();
                waitQueueMember.callback(error);
                continue;
            }
            if (!this.availableConnectionCount) {
                break;
            }
            const connection = this[kConnections].shift();
            if (!connection) {
                break;
            }
            if (!this.connectionIsPerished(connection)) {
                this[kCheckedOut].add(connection);
                this.emit(ConnectionPool.CONNECTION_CHECKED_OUT, new connection_pool_events_1.ConnectionCheckedOutEvent(this, connection));
                if (waitQueueMember.timer) {
                    (0, timers_1.clearTimeout)(waitQueueMember.timer);
                }
                this[kWaitQueue].shift();
                waitQueueMember.callback(undefined, connection);
            }
        }
        const { maxPoolSize, maxConnecting } = this.options;
        while (this.waitQueueSize > 0 &&
            this.pendingConnectionCount < maxConnecting &&
            (maxPoolSize === 0 || this.totalConnectionCount < maxPoolSize)) {
            const waitQueueMember = this[kWaitQueue].shift();
            if (!waitQueueMember || waitQueueMember[kCancelled]) {
                continue;
            }
            this.createConnection((err, connection) => {
                if (waitQueueMember[kCancelled]) {
                    if (!err && connection) {
                        this[kConnections].push(connection);
                    }
                }
                else {
                    if (err) {
                        this.emit(ConnectionPool.CONNECTION_CHECK_OUT_FAILED, new connection_pool_events_1.ConnectionCheckOutFailedEvent(this, 'connectionError'));
                    }
                    else if (connection) {
                        this[kCheckedOut].add(connection);
                        this.emit(ConnectionPool.CONNECTION_CHECKED_OUT, new connection_pool_events_1.ConnectionCheckedOutEvent(this, connection));
                    }
                    if (waitQueueMember.timer) {
                        (0, timers_1.clearTimeout)(waitQueueMember.timer);
                    }
                    waitQueueMember.callback(err, connection);
                }
                process.nextTick(() => this.processWaitQueue());
            });
        }
        this[kProcessingWaitQueue] = false;
    }
}
exports.ConnectionPool = ConnectionPool;
/**
 * Emitted when the connection pool is created.
 * @event
 */
ConnectionPool.CONNECTION_POOL_CREATED = constants_1.CONNECTION_POOL_CREATED;
/**
 * Emitted once when the connection pool is closed
 * @event
 */
ConnectionPool.CONNECTION_POOL_CLOSED = constants_1.CONNECTION_POOL_CLOSED;
/**
 * Emitted each time the connection pool is cleared and it's generation incremented
 * @event
 */
ConnectionPool.CONNECTION_POOL_CLEARED = constants_1.CONNECTION_POOL_CLEARED;
/**
 * Emitted each time the connection pool is marked ready
 * @event
 */
ConnectionPool.CONNECTION_POOL_READY = constants_1.CONNECTION_POOL_READY;
/**
 * Emitted when a connection is created.
 * @event
 */
ConnectionPool.CONNECTION_CREATED = constants_1.CONNECTION_CREATED;
/**
 * Emitted when a connection becomes established, and is ready to use
 * @event
 */
ConnectionPool.CONNECTION_READY = constants_1.CONNECTION_READY;
/**
 * Emitted when a connection is closed
 * @event
 */
ConnectionPool.CONNECTION_CLOSED = constants_1.CONNECTION_CLOSED;
/**
 * Emitted when an attempt to check out a connection begins
 * @event
 */
ConnectionPool.CONNECTION_CHECK_OUT_STARTED = constants_1.CONNECTION_CHECK_OUT_STARTED;
/**
 * Emitted when an attempt to check out a connection fails
 * @event
 */
ConnectionPool.CONNECTION_CHECK_OUT_FAILED = constants_1.CONNECTION_CHECK_OUT_FAILED;
/**
 * Emitted each time a connection is successfully checked out of the connection pool
 * @event
 */
ConnectionPool.CONNECTION_CHECKED_OUT = constants_1.CONNECTION_CHECKED_OUT;
/**
 * Emitted each time a connection is successfully checked into the connection pool
 * @event
 */
ConnectionPool.CONNECTION_CHECKED_IN = constants_1.CONNECTION_CHECKED_IN;
//# sourceMappingURL=connection_pool.js.mapPK�����O[�a㱋�����
��metrics.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ConnectionPoolMetrics = void 0;
/** @internal */
class ConnectionPoolMetrics {
    constructor() {
        this.txnConnections = 0;
        this.cursorConnections = 0;
        this.otherConnections = 0;
    }
    /**
     * Mark a connection as pinned for a specific operation.
     */
    markPinned(pinType) {
        if (pinType === ConnectionPoolMetrics.TXN) {
            this.txnConnections += 1;
        }
        else if (pinType === ConnectionPoolMetrics.CURSOR) {
            this.cursorConnections += 1;
        }
        else {
            this.otherConnections += 1;
        }
    }
    /**
     * Unmark a connection as pinned for an operation.
     */
    markUnpinned(pinType) {
        if (pinType === ConnectionPoolMetrics.TXN) {
            this.txnConnections -= 1;
        }
        else if (pinType === ConnectionPoolMetrics.CURSOR) {
            this.cursorConnections -= 1;
        }
        else {
            this.otherConnections -= 1;
        }
    }
    /**
     * Return information about the cmap metrics as a string.
     */
    info(maxPoolSize) {
        return ('Timed out while checking out a connection from connection pool: ' +
            `maxPoolSize: ${maxPoolSize}, ` +
            `connections in use by cursors: ${this.cursorConnections}, ` +
            `connections in use by transactions: ${this.txnConnections}, ` +
            `connections in use by other operations: ${this.otherConnections}`);
    }
    /**
     * Reset the metrics to the initial values.
     */
    reset() {
        this.txnConnections = 0;
        this.cursorConnections = 0;
        this.otherConnections = 0;
    }
}
exports.ConnectionPoolMetrics = ConnectionPoolMetrics;
ConnectionPoolMetrics.TXN = 'txn';
ConnectionPoolMetrics.CURSOR = 'cursor';
ConnectionPoolMetrics.OTHER = 'other';
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Object.defineProperty(exports, "__esModule", { value: true });
exports.CommandFailedEvent = exports.CommandSucceededEvent = exports.CommandStartedEvent = void 0;
const constants_1 = require("../constants");
const utils_1 = require("../utils");
const commands_1 = require("./commands");
/**
 * An event indicating the start of a given
 * @public
 * @category Event
 */
class CommandStartedEvent {
    /**
     * Create a started event
     *
     * @internal
     * @param pool - the pool that originated the command
     * @param command - the command
     */
    constructor(connection, command) {
        const cmd = extractCommand(command);
        const commandName = extractCommandName(cmd);
        const { address, connectionId, serviceId } = extractConnectionDetails(connection);
        // TODO: remove in major revision, this is not spec behavior
        if (SENSITIVE_COMMANDS.has(commandName)) {
            this.commandObj = {};
            this.commandObj[commandName] = true;
        }
        this.address = address;
        this.connectionId = connectionId;
        this.serviceId = serviceId;
        this.requestId = command.requestId;
        this.databaseName = databaseName(command);
        this.commandName = commandName;
        this.command = maybeRedact(commandName, cmd, cmd);
    }
    /* @internal */
    get hasServiceId() {
        return !!this.serviceId;
    }
}
exports.CommandStartedEvent = CommandStartedEvent;
/**
 * An event indicating the success of a given command
 * @public
 * @category Event
 */
class CommandSucceededEvent {
    /**
     * Create a succeeded event
     *
     * @internal
     * @param pool - the pool that originated the command
     * @param command - the command
     * @param reply - the reply for this command from the server
     * @param started - a high resolution tuple timestamp of when the command was first sent, to calculate duration
     */
    constructor(connection, command, reply, started) {
        const cmd = extractCommand(command);
        const commandName = extractCommandName(cmd);
        const { address, connectionId, serviceId } = extractConnectionDetails(connection);
        this.address = address;
        this.connectionId = connectionId;
        this.serviceId = serviceId;
        this.requestId = command.requestId;
        this.commandName = commandName;
        this.duration = (0, utils_1.calculateDurationInMs)(started);
        this.reply = maybeRedact(commandName, cmd, extractReply(command, reply));
    }
    /* @internal */
    get hasServiceId() {
        return !!this.serviceId;
    }
}
exports.CommandSucceededEvent = CommandSucceededEvent;
/**
 * An event indicating the failure of a given command
 * @public
 * @category Event
 */
class CommandFailedEvent {
    /**
     * Create a failure event
     *
     * @internal
     * @param pool - the pool that originated the command
     * @param command - the command
     * @param error - the generated error or a server error response
     * @param started - a high resolution tuple timestamp of when the command was first sent, to calculate duration
     */
    constructor(connection, command, error, started) {
        const cmd = extractCommand(command);
        const commandName = extractCommandName(cmd);
        const { address, connectionId, serviceId } = extractConnectionDetails(connection);
        this.address = address;
        this.connectionId = connectionId;
        this.serviceId = serviceId;
        this.requestId = command.requestId;
        this.commandName = commandName;
        this.duration = (0, utils_1.calculateDurationInMs)(started);
        this.failure = maybeRedact(commandName, cmd, error);
    }
    /* @internal */
    get hasServiceId() {
        return !!this.serviceId;
    }
}
exports.CommandFailedEvent = CommandFailedEvent;
/** Commands that we want to redact because of the sensitive nature of their contents */
const SENSITIVE_COMMANDS = new Set([
    'authenticate',
    'saslStart',
    'saslContinue',
    'getnonce',
    'createUser',
    'updateUser',
    'copydbgetnonce',
    'copydbsaslstart',
    'copydb'
]);
const HELLO_COMMANDS = new Set(['hello', constants_1.LEGACY_HELLO_COMMAND, constants_1.LEGACY_HELLO_COMMAND_CAMEL_CASE]);
// helper methods
const extractCommandName = (commandDoc) => Object.keys(commandDoc)[0];
const namespace = (command) => command.ns;
const databaseName = (command) => command.ns.split('.')[0];
const collectionName = (command) => command.ns.split('.')[1];
const maybeRedact = (commandName, commandDoc, result) => SENSITIVE_COMMANDS.has(commandName) ||
    (HELLO_COMMANDS.has(commandName) && commandDoc.speculativeAuthenticate)
    ? {}
    : result;
const LEGACY_FIND_QUERY_MAP = {
    $query: 'filter',
    $orderby: 'sort',
    $hint: 'hint',
    $comment: 'comment',
    $maxScan: 'maxScan',
    $max: 'max',
    $min: 'min',
    $returnKey: 'returnKey',
    $showDiskLoc: 'showRecordId',
    $maxTimeMS: 'maxTimeMS',
    $snapshot: 'snapshot'
};
const LEGACY_FIND_OPTIONS_MAP = {
    numberToSkip: 'skip',
    numberToReturn: 'batchSize',
    returnFieldSelector: 'projection'
};
const OP_QUERY_KEYS = [
    'tailable',
    'oplogReplay',
    'noCursorTimeout',
    'awaitData',
    'partial',
    'exhaust'
];
/** Extract the actual command from the query, possibly up-converting if it's a legacy format */
function extractCommand(command) {
    var _a;
    if (command instanceof commands_1.Msg) {
        return (0, utils_1.deepCopy)(command.command);
    }
    if ((_a = command.query) === null || _a === void 0 ? void 0 : _a.$query) {
        let result;
        if (command.ns === 'admin.$cmd') {
            // up-convert legacy command
            result = Object.assign({}, command.query.$query);
        }
        else {
            // up-convert legacy find command
            result = { find: collectionName(command) };
            Object.keys(LEGACY_FIND_QUERY_MAP).forEach(key => {
                if (command.query[key] != null) {
                    result[LEGACY_FIND_QUERY_MAP[key]] = (0, utils_1.deepCopy)(command.query[key]);
                }
            });
        }
        Object.keys(LEGACY_FIND_OPTIONS_MAP).forEach(key => {
            const legacyKey = key;
            if (command[legacyKey] != null) {
                result[LEGACY_FIND_OPTIONS_MAP[legacyKey]] = (0, utils_1.deepCopy)(command[legacyKey]);
            }
        });
        OP_QUERY_KEYS.forEach(key => {
            if (command[key]) {
                result[key] = command[key];
            }
        });
        if (command.pre32Limit != null) {
            result.limit = command.pre32Limit;
        }
        if (command.query.$explain) {
            return { explain: result };
        }
        return result;
    }
    const clonedQuery = {};
    const clonedCommand = {};
    if (command.query) {
        for (const k in command.query) {
            clonedQuery[k] = (0, utils_1.deepCopy)(command.query[k]);
        }
        clonedCommand.query = clonedQuery;
    }
    for (const k in command) {
        if (k === 'query')
            continue;
        clonedCommand[k] = (0, utils_1.deepCopy)(command[k]);
    }
    return command.query ? clonedQuery : clonedCommand;
}
function extractReply(command, reply) {
    if (!reply) {
        return reply;
    }
    if (command instanceof commands_1.Msg) {
        return (0, utils_1.deepCopy)(reply.result ? reply.result : reply);
    }
    // is this a legacy find command?
    if (command.query && command.query.$query != null) {
        return {
            ok: 1,
            cursor: {
                id: (0, utils_1.deepCopy)(reply.cursorId),
                ns: namespace(command),
                firstBatch: (0, utils_1.deepCopy)(reply.documents)
            }
        };
    }
    return (0, utils_1.deepCopy)(reply.result ? reply.result : reply);
}
function extractConnectionDetails(connection) {
    let connectionId;
    if ('id' in connection) {
        connectionId = connection.id;
    }
    return {
        address: connection.address,
        serviceId: connection.serviceId,
        connectionId
    };
}
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��connection.jsnu�ȯ����������"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.hasSessionSupport = exports.CryptoConnection = exports.Connection = void 0;
const timers_1 = require("timers");
const constants_1 = require("../constants");
const error_1 = require("../error");
const mongo_types_1 = require("../mongo_types");
const sessions_1 = require("../sessions");
const utils_1 = require("../utils");
const command_monitoring_events_1 = require("./command_monitoring_events");
const commands_1 = require("./commands");
const message_stream_1 = require("./message_stream");
const stream_description_1 = require("./stream_description");
const shared_1 = require("./wire_protocol/shared");
/** @internal */
const kStream = Symbol('stream');
/** @internal */
const kQueue = Symbol('queue');
/** @internal */
const kMessageStream = Symbol('messageStream');
/** @internal */
const kGeneration = Symbol('generation');
/** @internal */
const kLastUseTime = Symbol('lastUseTime');
/** @internal */
const kClusterTime = Symbol('clusterTime');
/** @internal */
const kDescription = Symbol('description');
/** @internal */
const kHello = Symbol('hello');
/** @internal */
const kAutoEncrypter = Symbol('autoEncrypter');
/** @internal */
const kDelayedTimeoutId = Symbol('delayedTimeoutId');
const INVALID_QUEUE_SIZE = 'Connection internal queue contains more than 1 operation description';
/** @internal */
class Connection extends mongo_types_1.TypedEventEmitter {
    constructor(stream, options) {
        var _a, _b;
        super();
        this.id = options.id;
        this.address = streamIdentifier(stream, options);
        this.socketTimeoutMS = (_a = options.socketTimeoutMS) !== null && _a !== void 0 ? _a : 0;
        this.monitorCommands = options.monitorCommands;
        this.serverApi = options.serverApi;
        this.closed = false;
        this.destroyed = false;
        this[kHello] = null;
        this[kClusterTime] = null;
        this[kDescription] = new stream_description_1.StreamDescription(this.address, options);
        this[kGeneration] = options.generation;
        this[kLastUseTime] = (0, utils_1.now)();
        // setup parser stream and message handling
        this[kQueue] = new Map();
        this[kMessageStream] = new message_stream_1.MessageStream({
            ...options,
            maxBsonMessageSize: (_b = this.hello) === null || _b === void 0 ? void 0 : _b.maxBsonMessageSize
        });
        this[kStream] = stream;
        this[kDelayedTimeoutId] = null;
        this[kMessageStream].on('message', message => this.onMessage(message));
        this[kMessageStream].on('error', error => this.onError(error));
        this[kStream].on('close', () => this.onClose());
        this[kStream].on('timeout', () => this.onTimeout());
        this[kStream].on('error', () => {
            /* ignore errors, listen to `close` instead */
        });
        // hook the message stream up to the passed in stream
        this[kStream].pipe(this[kMessageStream]);
        this[kMessageStream].pipe(this[kStream]);
    }
    get description() {
        return this[kDescription];
    }
    get hello() {
        return this[kHello];
    }
    // the `connect` method stores the result of the handshake hello on the connection
    set hello(response) {
        this[kDescription].receiveResponse(response);
        this[kDescription] = Object.freeze(this[kDescription]);
        // TODO: remove this, and only use the `StreamDescription` in the future
        this[kHello] = response;
    }
    // Set the whether the message stream is for a monitoring connection.
    set isMonitoringConnection(value) {
        this[kMessageStream].isMonitoringConnection = value;
    }
    get isMonitoringConnection() {
        return this[kMessageStream].isMonitoringConnection;
    }
    get serviceId() {
        var _a;
        return (_a = this.hello) === null || _a === void 0 ? void 0 : _a.serviceId;
    }
    get loadBalanced() {
        return this.description.loadBalanced;
    }
    get generation() {
        return this[kGeneration] || 0;
    }
    set generation(generation) {
        this[kGeneration] = generation;
    }
    get idleTime() {
        return (0, utils_1.calculateDurationInMs)(this[kLastUseTime]);
    }
    get clusterTime() {
        return this[kClusterTime];
    }
    get stream() {
        return this[kStream];
    }
    markAvailable() {
        this[kLastUseTime] = (0, utils_1.now)();
    }
    onError(error) {
        if (this.closed) {
            return;
        }
        this[kStream].destroy(error);
        this.closed = true;
        for (const op of this[kQueue].values()) {
            op.cb(error);
        }
        this[kQueue].clear();
        this.emit(Connection.CLOSE);
    }
    onClose() {
        if (this.closed) {
            return;
        }
        this.closed = true;
        const message = `connection ${this.id} to ${this.address} closed`;
        for (const op of this[kQueue].values()) {
            op.cb(new error_1.MongoNetworkError(message));
        }
        this[kQueue].clear();
        this.emit(Connection.CLOSE);
    }
    onTimeout() {
        if (this.closed) {
            return;
        }
        this[kDelayedTimeoutId] = (0, timers_1.setTimeout)(() => {
            this[kStream].destroy();
            this.closed = true;
            const message = `connection ${this.id} to ${this.address} timed out`;
            const beforeHandshake = this.hello == null;
            for (const op of this[kQueue].values()) {
                op.cb(new error_1.MongoNetworkTimeoutError(message, { beforeHandshake }));
            }
            this[kQueue].clear();
            this.emit(Connection.CLOSE);
        }, 1).unref(); // No need for this timer to hold the event loop open
    }
    onMessage(message) {
        const delayedTimeoutId = this[kDelayedTimeoutId];
        if (delayedTimeoutId != null) {
            (0, timers_1.clearTimeout)(delayedTimeoutId);
            this[kDelayedTimeoutId] = null;
        }
        // always emit the message, in case we are streaming
        this.emit('message', message);
        let operationDescription = this[kQueue].get(message.responseTo);
        if (!operationDescription && this.isMonitoringConnection) {
            // This is how we recover when the initial hello's requestId is not
            // the responseTo when hello responses have been skipped:
            // First check if the map is of invalid size
            if (this[kQueue].size > 1) {
                this.onError(new error_1.MongoRuntimeError(INVALID_QUEUE_SIZE));
            }
            else {
                // Get the first orphaned operation description.
                const entry = this[kQueue].entries().next();
                if (entry.value != null) {
                    const [requestId, orphaned] = entry.value;
                    // If the orphaned operation description exists then set it.
                    operationDescription = orphaned;
                    // Remove the entry with the bad request id from the queue.
                    this[kQueue].delete(requestId);
                }
            }
        }
        if (!operationDescription) {
            return;
        }
        const callback = operationDescription.cb;
        // SERVER-45775: For exhaust responses we should be able to use the same requestId to
        // track response, however the server currently synthetically produces remote requests
        // making the `responseTo` change on each response
        this[kQueue].delete(message.responseTo);
        if ('moreToCome' in message && message.moreToCome) {
            // If the operation description check above does find an orphaned
            // description and sets the operationDescription then this line will put one
            // back in the queue with the correct requestId and will resolve not being able
            // to find the next one via the responseTo of the next streaming hello.
            this[kQueue].set(message.requestId, operationDescription);
        }
        else if (operationDescription.socketTimeoutOverride) {
            this[kStream].setTimeout(this.socketTimeoutMS);
        }
        try {
            // Pass in the entire description because it has BSON parsing options
            message.parse(operationDescription);
        }
        catch (err) {
            // If this error is generated by our own code, it will already have the correct class applied
            // if it is not, then it is coming from a catastrophic data parse failure or the BSON library
            // in either case, it should not be wrapped
            callback(err);
            return;
        }
        if (message.documents[0]) {
            const document = message.documents[0];
            const session = operationDescription.session;
            if (session) {
                (0, sessions_1.updateSessionFromResponse)(session, document);
            }
            if (document.$clusterTime) {
                this[kClusterTime] = document.$clusterTime;
                this.emit(Connection.CLUSTER_TIME_RECEIVED, document.$clusterTime);
            }
            if (operationDescription.command) {
                if (document.writeConcernError) {
                    callback(new error_1.MongoWriteConcernError(document.writeConcernError, document));
                    return;
                }
                if (document.ok === 0 || document.$err || document.errmsg || document.code) {
                    callback(new error_1.MongoServerError(document));
                    return;
                }
            }
            else {
                // Pre 3.2 support
                if (document.ok === 0 || document.$err || document.errmsg) {
                    callback(new error_1.MongoServerError(document));
                    return;
                }
            }
        }
        callback(undefined, message.documents[0]);
    }
    destroy(options, callback) {
        if (typeof options === 'function') {
            callback = options;
            options = { force: false };
        }
        this.removeAllListeners(Connection.PINNED);
        this.removeAllListeners(Connection.UNPINNED);
        options = Object.assign({ force: false }, options);
        if (this[kStream] == null || this.destroyed) {
            this.destroyed = true;
            if (typeof callback === 'function') {
                callback();
            }
            return;
        }
        if (options.force) {
            this[kStream].destroy();
            this.destroyed = true;
            if (typeof callback === 'function') {
                callback();
            }
            return;
        }
        this[kStream].end(() => {
            this.destroyed = true;
            if (typeof callback === 'function') {
                callback();
            }
        });
    }
    command(ns, cmd, options, callback) {
        const readPreference = (0, shared_1.getReadPreference)(cmd, options);
        const shouldUseOpMsg = supportsOpMsg(this);
        const session = options === null || options === void 0 ? void 0 : options.session;
        let clusterTime = this.clusterTime;
        let finalCmd = Object.assign({}, cmd);
        if (this.serverApi) {
            const { version, strict, deprecationErrors } = this.serverApi;
            finalCmd.apiVersion = version;
            if (strict != null)
                finalCmd.apiStrict = strict;
            if (deprecationErrors != null)
                finalCmd.apiDeprecationErrors = deprecationErrors;
        }
        if (hasSessionSupport(this) && session) {
            if (session.clusterTime &&
                clusterTime &&
                session.clusterTime.clusterTime.greaterThan(clusterTime.clusterTime)) {
                clusterTime = session.clusterTime;
            }
            const err = (0, sessions_1.applySession)(session, finalCmd, options);
            if (err) {
                return callback(err);
            }
        }
        // if we have a known cluster time, gossip it
        if (clusterTime) {
            finalCmd.$clusterTime = clusterTime;
        }
        if ((0, shared_1.isSharded)(this) && !shouldUseOpMsg && readPreference && readPreference.mode !== 'primary') {
            finalCmd = {
                $query: finalCmd,
                $readPreference: readPreference.toJSON()
            };
        }
        const commandOptions = Object.assign({
            command: true,
            numberToSkip: 0,
            numberToReturn: -1,
            checkKeys: false,
            // This value is not overridable
            secondaryOk: readPreference.secondaryOk()
        }, options);
        const cmdNs = `${ns.db}.$cmd`;
        const message = shouldUseOpMsg
            ? new commands_1.Msg(cmdNs, finalCmd, commandOptions)
            : new commands_1.Query(cmdNs, finalCmd, commandOptions);
        try {
            write(this, message, commandOptions, callback);
        }
        catch (err) {
            callback(err);
        }
    }
}
exports.Connection = Connection;
/** @event */
Connection.COMMAND_STARTED = constants_1.COMMAND_STARTED;
/** @event */
Connection.COMMAND_SUCCEEDED = constants_1.COMMAND_SUCCEEDED;
/** @event */
Connection.COMMAND_FAILED = constants_1.COMMAND_FAILED;
/** @event */
Connection.CLUSTER_TIME_RECEIVED = constants_1.CLUSTER_TIME_RECEIVED;
/** @event */
Connection.CLOSE = constants_1.CLOSE;
/** @event */
Connection.MESSAGE = constants_1.MESSAGE;
/** @event */
Connection.PINNED = constants_1.PINNED;
/** @event */
Connection.UNPINNED = constants_1.UNPINNED;
/** @internal */
class CryptoConnection extends Connection {
    constructor(stream, options) {
        super(stream, options);
        this[kAutoEncrypter] = options.autoEncrypter;
    }
    /** @internal @override */
    command(ns, cmd, options, callback) {
        const autoEncrypter = this[kAutoEncrypter];
        if (!autoEncrypter) {
            return callback(new error_1.MongoMissingDependencyError('No AutoEncrypter available for encryption'));
        }
        const serverWireVersion = (0, utils_1.maxWireVersion)(this);
        if (serverWireVersion === 0) {
            // This means the initial handshake hasn't happened yet
            return super.command(ns, cmd, options, callback);
        }
        if (serverWireVersion < 8) {
            callback(new error_1.MongoCompatibilityError('Auto-encryption requires a minimum MongoDB version of 4.2'));
            return;
        }
        // Save sort or indexKeys based on the command being run
        // the encrypt API serializes our JS objects to BSON to pass to the native code layer
        // and then deserializes the encrypted result, the protocol level components
        // of the command (ex. sort) are then converted to JS objects potentially losing
        // import key order information. These fields are never encrypted so we can save the values
        // from before the encryption and replace them after encryption has been performed
        const sort = cmd.find || cmd.findAndModify ? cmd.sort : null;
        const indexKeys = cmd.createIndexes
            ? cmd.indexes.map((index) => index.key)
            : null;
        autoEncrypter.encrypt(ns.toString(), cmd, options, (err, encrypted) => {
            if (err || encrypted == null) {
                callback(err, null);
                return;
            }
            // Replace the saved values
            if (sort != null && (cmd.find || cmd.findAndModify)) {
                encrypted.sort = sort;
            }
            if (indexKeys != null && cmd.createIndexes) {
                for (const [offset, index] of indexKeys.entries()) {
                    encrypted.indexes[offset].key = index;
                }
            }
            super.command(ns, encrypted, options, (err, response) => {
                if (err || response == null) {
                    callback(err, response);
                    return;
                }
                autoEncrypter.decrypt(response, options, callback);
            });
        });
    }
}
exports.CryptoConnection = CryptoConnection;
/** @internal */
function hasSessionSupport(conn) {
    const description = conn.description;
    return description.logicalSessionTimeoutMinutes != null || !!description.loadBalanced;
}
exports.hasSessionSupport = hasSessionSupport;
function supportsOpMsg(conn) {
    const description = conn.description;
    if (description == null) {
        return false;
    }
    return (0, utils_1.maxWireVersion)(conn) >= 6 && !description.__nodejs_mock_server__;
}
function streamIdentifier(stream, options) {
    if (options.proxyHost) {
        // If proxy options are specified, the properties of `stream` itself
        // will not accurately reflect what endpoint this is connected to.
        return options.hostAddress.toString();
    }
    const { remoteAddress, remotePort } = stream;
    if (typeof remoteAddress === 'string' && typeof remotePort === 'number') {
        return utils_1.HostAddress.fromHostPort(remoteAddress, remotePort).toString();
    }
    return (0, utils_1.uuidV4)().toString('hex');
}
function write(conn, command, options, callback) {
    options = options !== null && options !== void 0 ? options : {};
    const operationDescription = {
        requestId: command.requestId,
        cb: callback,
        session: options.session,
        noResponse: typeof options.noResponse === 'boolean' ? options.noResponse : false,
        documentsReturnedIn: options.documentsReturnedIn,
        command: !!options.command,
        // for BSON parsing
        promoteLongs: typeof options.promoteLongs === 'boolean' ? options.promoteLongs : true,
        promoteValues: typeof options.promoteValues === 'boolean' ? options.promoteValues : true,
        promoteBuffers: typeof options.promoteBuffers === 'boolean' ? options.promoteBuffers : false,
        bsonRegExp: typeof options.bsonRegExp === 'boolean' ? options.bsonRegExp : false,
        enableUtf8Validation: typeof options.enableUtf8Validation === 'boolean' ? options.enableUtf8Validation : true,
        raw: typeof options.raw === 'boolean' ? options.raw : false,
        started: 0
    };
    if (conn[kDescription] && conn[kDescription].compressor) {
        operationDescription.agreedCompressor = conn[kDescription].compressor;
        if (conn[kDescription].zlibCompressionLevel) {
            operationDescription.zlibCompressionLevel = conn[kDescription].zlibCompressionLevel;
        }
    }
    if (typeof options.socketTimeoutMS === 'number') {
        operationDescription.socketTimeoutOverride = true;
        conn[kStream].setTimeout(options.socketTimeoutMS);
    }
    // if command monitoring is enabled we need to modify the callback here
    if (conn.monitorCommands) {
        conn.emit(Connection.COMMAND_STARTED, new command_monitoring_events_1.CommandStartedEvent(conn, command));
        operationDescription.started = (0, utils_1.now)();
        operationDescription.cb = (err, reply) => {
            if (err) {
                conn.emit(Connection.COMMAND_FAILED, new command_monitoring_events_1.CommandFailedEvent(conn, command, err, operationDescription.started));
            }
            else {
                if (reply && (reply.ok === 0 || reply.$err)) {
                    conn.emit(Connection.COMMAND_FAILED, new command_monitoring_events_1.CommandFailedEvent(conn, command, reply, operationDescription.started));
                }
                else {
                    conn.emit(Connection.COMMAND_SUCCEEDED, new command_monitoring_events_1.CommandSucceededEvent(conn, command, reply, operationDescription.started));
                }
            }
            if (typeof callback === 'function') {
                callback(err, reply);
            }
        };
    }
    if (!operationDescription.noResponse) {
        conn[kQueue].set(operationDescription.requestId, operationDescription);
    }
    try {
        conn[kMessageStream].writeCommand(command, operationDescription);
    }
    catch (e) {
        if (!operationDescription.noResponse) {
            conn[kQueue].delete(operationDescription.requestId);
            operationDescription.cb(e);
            return;
        }
    }
    if (operationDescription.noResponse) {
        operationDescription.cb();
    }
}
//# sourceMappingURL=connection.js.mapPK������O[��7ld��ld����connection_pool.tsnu�ȯ����������import { clearTimeout, setTimeout } from 'timers';

import type { ObjectId } from '../bson';
import {
  APM_EVENTS,
  CONNECTION_CHECK_OUT_FAILED,
  CONNECTION_CHECK_OUT_STARTED,
  CONNECTION_CHECKED_IN,
  CONNECTION_CHECKED_OUT,
  CONNECTION_CLOSED,
  CONNECTION_CREATED,
  CONNECTION_POOL_CLEARED,
  CONNECTION_POOL_CLOSED,
  CONNECTION_POOL_CREATED,
  CONNECTION_POOL_READY,
  CONNECTION_READY
} from '../constants';
import {
  MongoError,
  MongoInvalidArgumentError,
  MongoNetworkError,
  MongoRuntimeError,
  MongoServerError
} from '../error';
import { Logger } from '../logger';
import { CancellationToken, TypedEventEmitter } from '../mongo_types';
import type { Server } from '../sdam/server';
import { Callback, eachAsync, List, makeCounter } from '../utils';
import { connect } from './connect';
import { Connection, ConnectionEvents, ConnectionOptions } from './connection';
import {
  ConnectionCheckedInEvent,
  ConnectionCheckedOutEvent,
  ConnectionCheckOutFailedEvent,
  ConnectionCheckOutStartedEvent,
  ConnectionClosedEvent,
  ConnectionCreatedEvent,
  ConnectionPoolClearedEvent,
  ConnectionPoolClosedEvent,
  ConnectionPoolCreatedEvent,
  ConnectionPoolReadyEvent,
  ConnectionReadyEvent
} from './connection_pool_events';
import { PoolClearedError, PoolClosedError, WaitQueueTimeoutError } from './errors';
import { ConnectionPoolMetrics } from './metrics';

/** @internal */
const kServer = Symbol('server');
/** @internal */
const kLogger = Symbol('logger');
/** @internal */
const kConnections = Symbol('connections');
/** @internal */
const kPending = Symbol('pending');
/** @internal */
const kCheckedOut = Symbol('checkedOut');
/** @internal */
const kMinPoolSizeTimer = Symbol('minPoolSizeTimer');
/** @internal */
const kGeneration = Symbol('generation');
/** @internal */
const kServiceGenerations = Symbol('serviceGenerations');
/** @internal */
const kConnectionCounter = Symbol('connectionCounter');
/** @internal */
const kCancellationToken = Symbol('cancellationToken');
/** @internal */
const kWaitQueue = Symbol('waitQueue');
/** @internal */
const kCancelled = Symbol('cancelled');
/** @internal */
const kMetrics = Symbol('metrics');
/** @internal */
const kProcessingWaitQueue = Symbol('processingWaitQueue');
/** @internal */
const kPoolState = Symbol('poolState');

/** @public */
export interface ConnectionPoolOptions extends Omit<ConnectionOptions, 'id' | 'generation'> {
  /** The maximum number of connections that may be associated with a pool at a given time. This includes in use and available connections. */
  maxPoolSize: number;
  /** The minimum number of connections that MUST exist at any moment in a single connection pool. */
  minPoolSize: number;
  /** The maximum number of connections that may be in the process of being established concurrently by the connection pool. */
  maxConnecting: number;
  /** The maximum amount of time a connection should remain idle in the connection pool before being marked idle. */
  maxIdleTimeMS: number;
  /** The maximum amount of time operation execution should wait for a connection to become available. The default is 0 which means there is no limit. */
  waitQueueTimeoutMS: number;
  /** If we are in load balancer mode. */
  loadBalanced: boolean;
  /** @internal */
  minPoolSizeCheckFrequencyMS?: number;
}

/** @internal */
export interface WaitQueueMember {
  callback: Callback<Connection>;
  timer?: NodeJS.Timeout;
  [kCancelled]?: boolean;
}

/** @internal */
export const PoolState = Object.freeze({
  paused: 'paused',
  ready: 'ready',
  closed: 'closed'
} as const);

/** @public */
export interface CloseOptions {
  force?: boolean;
}

/** @public */
export type ConnectionPoolEvents = {
  connectionPoolCreated(event: ConnectionPoolCreatedEvent): void;
  connectionPoolReady(event: ConnectionPoolReadyEvent): void;
  connectionPoolClosed(event: ConnectionPoolClosedEvent): void;
  connectionPoolCleared(event: ConnectionPoolClearedEvent): void;
  connectionCreated(event: ConnectionCreatedEvent): void;
  connectionReady(event: ConnectionReadyEvent): void;
  connectionClosed(event: ConnectionClosedEvent): void;
  connectionCheckOutStarted(event: ConnectionCheckOutStartedEvent): void;
  connectionCheckOutFailed(event: ConnectionCheckOutFailedEvent): void;
  connectionCheckedOut(event: ConnectionCheckedOutEvent): void;
  connectionCheckedIn(event: ConnectionCheckedInEvent): void;
} & Omit<ConnectionEvents, 'close' | 'message'>;

/**
 * A pool of connections which dynamically resizes, and emit events related to pool activity
 * @internal
 */
export class ConnectionPool extends TypedEventEmitter<ConnectionPoolEvents> {
  options: Readonly<ConnectionPoolOptions>;
  [kPoolState]: typeof PoolState[keyof typeof PoolState];
  [kServer]: Server;
  [kLogger]: Logger;
  [kConnections]: List<Connection>;
  [kPending]: number;
  [kCheckedOut]: Set<Connection>;
  [kMinPoolSizeTimer]?: NodeJS.Timeout;
  /**
   * An integer representing the SDAM generation of the pool
   */
  [kGeneration]: number;
  /**
   * A map of generations to service ids
   */
  [kServiceGenerations]: Map<string, number>;
  [kConnectionCounter]: Generator<number>;
  [kCancellationToken]: CancellationToken;
  [kWaitQueue]: List<WaitQueueMember>;
  [kMetrics]: ConnectionPoolMetrics;
  [kProcessingWaitQueue]: boolean;

/**
   * Emitted when the connection pool is created.
   * @event
   */
  static readonly CONNECTION_POOL_CREATED = CONNECTION_POOL_CREATED;
  /**
   * Emitted once when the connection pool is closed
   * @event
   */
  static readonly CONNECTION_POOL_CLOSED = CONNECTION_POOL_CLOSED;
  /**
   * Emitted each time the connection pool is cleared and it's generation incremented
   * @event
   */
  static readonly CONNECTION_POOL_CLEARED = CONNECTION_POOL_CLEARED;
  /**
   * Emitted each time the connection pool is marked ready
   * @event
   */
  static readonly CONNECTION_POOL_READY = CONNECTION_POOL_READY;
  /**
   * Emitted when a connection is created.
   * @event
   */
  static readonly CONNECTION_CREATED = CONNECTION_CREATED;
  /**
   * Emitted when a connection becomes established, and is ready to use
   * @event
   */
  static readonly CONNECTION_READY = CONNECTION_READY;
  /**
   * Emitted when a connection is closed
   * @event
   */
  static readonly CONNECTION_CLOSED = CONNECTION_CLOSED;
  /**
   * Emitted when an attempt to check out a connection begins
   * @event
   */
  static readonly CONNECTION_CHECK_OUT_STARTED = CONNECTION_CHECK_OUT_STARTED;
  /**
   * Emitted when an attempt to check out a connection fails
   * @event
   */
  static readonly CONNECTION_CHECK_OUT_FAILED = CONNECTION_CHECK_OUT_FAILED;
  /**
   * Emitted each time a connection is successfully checked out of the connection pool
   * @event
   */
  static readonly CONNECTION_CHECKED_OUT = CONNECTION_CHECKED_OUT;
  /**
   * Emitted each time a connection is successfully checked into the connection pool
   * @event
   */
  static readonly CONNECTION_CHECKED_IN = CONNECTION_CHECKED_IN;

constructor(server: Server, options: ConnectionPoolOptions) {
    super();

this.options = Object.freeze({
      ...options,
      connectionType: Connection,
      maxPoolSize: options.maxPoolSize ?? 100,
      minPoolSize: options.minPoolSize ?? 0,
      maxConnecting: options.maxConnecting ?? 2,
      maxIdleTimeMS: options.maxIdleTimeMS ?? 0,
      waitQueueTimeoutMS: options.waitQueueTimeoutMS ?? 0,
      minPoolSizeCheckFrequencyMS: options.minPoolSizeCheckFrequencyMS ?? 100,
      autoEncrypter: options.autoEncrypter,
      metadata: options.metadata
    });

if (this.options.minPoolSize > this.options.maxPoolSize) {
      throw new MongoInvalidArgumentError(
        'Connection pool minimum size must not be greater than maximum pool size'
      );
    }

this[kPoolState] = PoolState.paused;
    this[kServer] = server;
    this[kLogger] = new Logger('ConnectionPool');
    this[kConnections] = new List();
    this[kPending] = 0;
    this[kCheckedOut] = new Set();
    this[kMinPoolSizeTimer] = undefined;
    this[kGeneration] = 0;
    this[kServiceGenerations] = new Map();
    this[kConnectionCounter] = makeCounter(1);
    this[kCancellationToken] = new CancellationToken();
    this[kCancellationToken].setMaxListeners(Infinity);
    this[kWaitQueue] = new List();
    this[kMetrics] = new ConnectionPoolMetrics();
    this[kProcessingWaitQueue] = false;

process.nextTick(() => {
      this.emit(ConnectionPool.CONNECTION_POOL_CREATED, new ConnectionPoolCreatedEvent(this));
    });
  }

/** The address of the endpoint the pool is connected to */
  get address(): string {
    return this.options.hostAddress.toString();
  }

/**
   * Check if the pool has been closed
   *
   * TODO(NODE-3263): We can remove this property once shell no longer needs it
   */
  get closed(): boolean {
    return this[kPoolState] === PoolState.closed;
  }

/** An integer representing the SDAM generation of the pool */
  get generation(): number {
    return this[kGeneration];
  }

/** An integer expressing how many total connections (available + pending + in use) the pool currently has */
  get totalConnectionCount(): number {
    return (
      this.availableConnectionCount + this.pendingConnectionCount + this.currentCheckedOutCount
    );
  }

/** An integer expressing how many connections are currently available in the pool. */
  get availableConnectionCount(): number {
    return this[kConnections].length;
  }

get pendingConnectionCount(): number {
    return this[kPending];
  }

get currentCheckedOutCount(): number {
    return this[kCheckedOut].size;
  }

get waitQueueSize(): number {
    return this[kWaitQueue].length;
  }

get loadBalanced(): boolean {
    return this.options.loadBalanced;
  }

get serviceGenerations(): Map<string, number> {
    return this[kServiceGenerations];
  }

get serverError() {
    return this[kServer].description.error;
  }

/**
   * This is exposed ONLY for use in mongosh, to enable
   * killing all connections if a user quits the shell with
   * operations in progress.
   *
   * This property may be removed as a part of NODE-3263.
   */
  get checkedOutConnections() {
    return this[kCheckedOut];
  }

/**
   * Get the metrics information for the pool when a wait queue timeout occurs.
   */
  private waitQueueErrorMetrics(): string {
    return this[kMetrics].info(this.options.maxPoolSize);
  }

/**
   * Set the pool state to "ready"
   */
  ready(): void {
    if (this[kPoolState] !== PoolState.paused) {
      return;
    }
    this[kPoolState] = PoolState.ready;
    this.emit(ConnectionPool.CONNECTION_POOL_READY, new ConnectionPoolReadyEvent(this));
    clearTimeout(this[kMinPoolSizeTimer]);
    this.ensureMinPoolSize();
  }

/**
   * Check a connection out of this pool. The connection will continue to be tracked, but no reference to it
   * will be held by the pool. This means that if a connection is checked out it MUST be checked back in or
   * explicitly destroyed by the new owner.
   */
  checkOut(callback: Callback<Connection>): void {
    this.emit(
      ConnectionPool.CONNECTION_CHECK_OUT_STARTED,
      new ConnectionCheckOutStartedEvent(this)
    );

const waitQueueMember: WaitQueueMember = { callback };
    const waitQueueTimeoutMS = this.options.waitQueueTimeoutMS;
    if (waitQueueTimeoutMS) {
      waitQueueMember.timer = setTimeout(() => {
        waitQueueMember[kCancelled] = true;
        waitQueueMember.timer = undefined;

this.emit(
          ConnectionPool.CONNECTION_CHECK_OUT_FAILED,
          new ConnectionCheckOutFailedEvent(this, 'timeout')
        );
        waitQueueMember.callback(
          new WaitQueueTimeoutError(
            this.loadBalanced
              ? this.waitQueueErrorMetrics()
              : 'Timed out while checking out a connection from connection pool',
            this.address
          )
        );
      }, waitQueueTimeoutMS);
    }

this[kWaitQueue].push(waitQueueMember);
    process.nextTick(() => this.processWaitQueue());
  }

/**
   * Check a connection into the pool.
   *
   * @param connection - The connection to check in
   */
  checkIn(connection: Connection): void {
    const poolClosed = this.closed;
    const stale = this.connectionIsStale(connection);
    const willDestroy = !!(poolClosed || stale || connection.closed);

if (!willDestroy) {
      connection.markAvailable();
      this[kConnections].unshift(connection);
    }

this[kCheckedOut].delete(connection);
    this.emit(ConnectionPool.CONNECTION_CHECKED_IN, new ConnectionCheckedInEvent(this, connection));

if (willDestroy) {
      const reason = connection.closed ? 'error' : poolClosed ? 'poolClosed' : 'stale';
      this.destroyConnection(connection, reason);
    }

process.nextTick(() => this.processWaitQueue());
  }

/**
   * Clear the pool
   *
   * Pool reset is handled by incrementing the pool's generation count. Any existing connection of a
   * previous generation will eventually be pruned during subsequent checkouts.
   */
  clear(serviceId?: ObjectId): void {
    if (this.closed) {
      return;
    }

// handle load balanced case
    if (this.loadBalanced && serviceId) {
      const sid = serviceId.toHexString();
      const generation = this.serviceGenerations.get(sid);
      // Only need to worry if the generation exists, since it should
      // always be there but typescript needs the check.
      if (generation == null) {
        throw new MongoRuntimeError('Service generations are required in load balancer mode.');
      } else {
        // Increment the generation for the service id.
        this.serviceGenerations.set(sid, generation + 1);
      }
      this.emit(
        ConnectionPool.CONNECTION_POOL_CLEARED,
        new ConnectionPoolClearedEvent(this, { serviceId })
      );
      return;
    }

// handle non load-balanced case
    this[kGeneration] += 1;
    const alreadyPaused = this[kPoolState] === PoolState.paused;
    this[kPoolState] = PoolState.paused;

this.clearMinPoolSizeTimer();
    if (!alreadyPaused) {
      this.emit(ConnectionPool.CONNECTION_POOL_CLEARED, new ConnectionPoolClearedEvent(this));
    }
    this.processWaitQueue();
  }

/** Close the pool */
  close(callback: Callback<void>): void;
  close(options: CloseOptions, callback: Callback<void>): void;
  close(_options?: CloseOptions | Callback<void>, _cb?: Callback<void>): void {
    let options = _options as CloseOptions;
    const callback = (_cb ?? _options) as Callback<void>;
    if (typeof options === 'function') {
      options = {};
    }

options = Object.assign({ force: false }, options);
    if (this.closed) {
      return callback();
    }

// immediately cancel any in-flight connections
    this[kCancellationToken].emit('cancel');

// end the connection counter
    if (typeof this[kConnectionCounter].return === 'function') {
      this[kConnectionCounter].return(undefined);
    }

this[kPoolState] = PoolState.closed;
    this.clearMinPoolSizeTimer();
    this.processWaitQueue();

eachAsync<Connection>(
      this[kConnections].toArray(),
      (conn, cb) => {
        this.emit(
          ConnectionPool.CONNECTION_CLOSED,
          new ConnectionClosedEvent(this, conn, 'poolClosed')
        );
        conn.destroy(options, cb);
      },
      err => {
        this[kConnections].clear();
        this.emit(ConnectionPool.CONNECTION_POOL_CLOSED, new ConnectionPoolClosedEvent(this));
        callback(err);
      }
    );
  }

/**
   * Runs a lambda with an implicitly checked out connection, checking that connection back in when the lambda
   * has completed by calling back.
   *
   * NOTE: please note the required signature of `fn`
   *
   * @remarks When in load balancer mode, connections can be pinned to cursors or transactions.
   *   In these cases we pass the connection in to this method to ensure it is used and a new
   *   connection is not checked out.
   *
   * @param conn - A pinned connection for use in load balancing mode.
   * @param fn - A function which operates on a managed connection
   * @param callback - The original callback
   */
  withConnection(
    conn: Connection | undefined,
    fn: WithConnectionCallback,
    callback?: Callback<Connection>
  ): void {
    if (conn) {
      // use the provided connection, and do _not_ check it in after execution
      fn(undefined, conn, (fnErr, result) => {
        if (typeof callback === 'function') {
          if (fnErr) {
            callback(fnErr);
          } else {
            callback(undefined, result);
          }
        }
      });

return;
    }

this.checkOut((err, conn) => {
      // don't callback with `err` here, we might want to act upon it inside `fn`
      fn(err as MongoError, conn, (fnErr, result) => {
        if (typeof callback === 'function') {
          if (fnErr) {
            callback(fnErr);
          } else {
            callback(undefined, result);
          }
        }

if (conn) {
          this.checkIn(conn);
        }
      });
    });
  }

/** Clear the min pool size timer */
  private clearMinPoolSizeTimer(): void {
    const minPoolSizeTimer = this[kMinPoolSizeTimer];
    if (minPoolSizeTimer) {
      clearTimeout(minPoolSizeTimer);
    }
  }

private destroyConnection(connection: Connection, reason: string) {
    this.emit(
      ConnectionPool.CONNECTION_CLOSED,
      new ConnectionClosedEvent(this, connection, reason)
    );
    // destroy the connection
    process.nextTick(() => connection.destroy());
  }

private connectionIsStale(connection: Connection) {
    const serviceId = connection.serviceId;
    if (this.loadBalanced && serviceId) {
      const sid = serviceId.toHexString();
      const generation = this.serviceGenerations.get(sid);
      return connection.generation !== generation;
    }

return connection.generation !== this[kGeneration];
  }

private connectionIsIdle(connection: Connection) {
    return !!(this.options.maxIdleTimeMS && connection.idleTime > this.options.maxIdleTimeMS);
  }

private connectionIsPerished(connection: Connection) {
    const isStale = this.connectionIsStale(connection);
    const isIdle = this.connectionIsIdle(connection);
    if (!isStale && !isIdle && !connection.closed) {
      return false;
    }
    const reason = connection.closed ? 'error' : isStale ? 'stale' : 'idle';
    this.destroyConnection(connection, reason);
    return true;
  }

private createConnection(callback: Callback<Connection>) {
    const connectOptions: ConnectionOptions = {
      ...this.options,
      id: this[kConnectionCounter].next().value,
      generation: this[kGeneration],
      cancellationToken: this[kCancellationToken]
    };

this[kPending]++;
    // This is our version of a "virtual" no-I/O connection as the spec requires
    this.emit(
      ConnectionPool.CONNECTION_CREATED,
      new ConnectionCreatedEvent(this, { id: connectOptions.id })
    );

connect(connectOptions, (err, connection) => {
      if (err || !connection) {
        this[kLogger].debug(`connection attempt failed with error [${JSON.stringify(err)}]`);
        this[kPending]--;
        this.emit(
          ConnectionPool.CONNECTION_CLOSED,
          new ConnectionClosedEvent(this, { id: connectOptions.id, serviceId: undefined }, 'error')
        );
        if (err instanceof MongoNetworkError || err instanceof MongoServerError) {
          err.connectionGeneration = connectOptions.generation;
        }
        callback(err ?? new MongoRuntimeError('Connection creation failed without error'));
        return;
      }

// The pool might have closed since we started trying to create a connection
      if (this[kPoolState] !== PoolState.ready) {
        this[kPending]--;
        connection.destroy({ force: true });
        callback(this.closed ? new PoolClosedError(this) : new PoolClearedError(this));
        return;
      }

// forward all events from the connection to the pool
      for (const event of [...APM_EVENTS, Connection.CLUSTER_TIME_RECEIVED]) {
        connection.on(event, (e: any) => this.emit(event, e));
      }

if (this.loadBalanced) {
        connection.on(Connection.PINNED, pinType => this[kMetrics].markPinned(pinType));
        connection.on(Connection.UNPINNED, pinType => this[kMetrics].markUnpinned(pinType));

connection.markAvailable();
      this.emit(ConnectionPool.CONNECTION_READY, new ConnectionReadyEvent(this, connection));

this[kPending]--;
      callback(undefined, connection);
      return;
    });
  }

private ensureMinPoolSize() {
    const minPoolSize = this.options.minPoolSize;
    if (this[kPoolState] !== PoolState.ready || minPoolSize === 0) {
      return;
    }

this[kConnections].prune(connection => this.connectionIsPerished(connection));

if (
      this.totalConnectionCount < minPoolSize &&
      this.pendingConnectionCount < this.options.maxConnecting
    ) {
      // NOTE: ensureMinPoolSize should not try to get all the pending
      // connection permits because that potentially delays the availability of
      // the connection to a checkout request
      this.createConnection((err, connection) => {
        if (err) {
          this[kServer].handleError(err);
        }
        if (!err && connection) {
          this[kConnections].push(connection);
          process.nextTick(() => this.processWaitQueue());
        }
        if (this[kPoolState] === PoolState.ready) {
          clearTimeout(this[kMinPoolSizeTimer]);
          this[kMinPoolSizeTimer] = setTimeout(
            () => this.ensureMinPoolSize(),
            this.options.minPoolSizeCheckFrequencyMS
          );
        }
      });
    } else {
      clearTimeout(this[kMinPoolSizeTimer]);
      this[kMinPoolSizeTimer] = setTimeout(
        () => this.ensureMinPoolSize(),
        this.options.minPoolSizeCheckFrequencyMS
      );
    }
  }

private processWaitQueue() {
    if (this[kProcessingWaitQueue]) {
      return;
    }
    this[kProcessingWaitQueue] = true;

while (this.waitQueueSize) {
      const waitQueueMember = this[kWaitQueue].first();
      if (!waitQueueMember) {
        this[kWaitQueue].shift();
        continue;
      }

if (waitQueueMember[kCancelled]) {
        this[kWaitQueue].shift();
        continue;
      }

if (this[kPoolState] !== PoolState.ready) {
        const reason = this.closed ? 'poolClosed' : 'connectionError';
        const error = this.closed ? new PoolClosedError(this) : new PoolClearedError(this);
        this.emit(
          ConnectionPool.CONNECTION_CHECK_OUT_FAILED,
          new ConnectionCheckOutFailedEvent(this, reason)
        );
        if (waitQueueMember.timer) {
          clearTimeout(waitQueueMember.timer);
        }
        this[kWaitQueue].shift();
        waitQueueMember.callback(error);
        continue;
      }

if (!this.availableConnectionCount) {
        break;
      }

const connection = this[kConnections].shift();
      if (!connection) {
        break;
      }

if (!this.connectionIsPerished(connection)) {
        this[kCheckedOut].add(connection);
        this.emit(
          ConnectionPool.CONNECTION_CHECKED_OUT,
          new ConnectionCheckedOutEvent(this, connection)
        );
        if (waitQueueMember.timer) {
          clearTimeout(waitQueueMember.timer);
        }

this[kWaitQueue].shift();
        waitQueueMember.callback(undefined, connection);
      }
    }

const { maxPoolSize, maxConnecting } = this.options;
    while (
      this.waitQueueSize > 0 &&
      this.pendingConnectionCount < maxConnecting &&
      (maxPoolSize === 0 || this.totalConnectionCount < maxPoolSize)
    ) {
      const waitQueueMember = this[kWaitQueue].shift();
      if (!waitQueueMember || waitQueueMember[kCancelled]) {
        continue;
      }
      this.createConnection((err, connection) => {
        if (waitQueueMember[kCancelled]) {
          if (!err && connection) {
            this[kConnections].push(connection);
          }
        } else {
          if (err) {
            this.emit(
              ConnectionPool.CONNECTION_CHECK_OUT_FAILED,
              new ConnectionCheckOutFailedEvent(this, 'connectionError')
            );
          } else if (connection) {
            this[kCheckedOut].add(connection);
            this.emit(
              ConnectionPool.CONNECTION_CHECKED_OUT,
              new ConnectionCheckedOutEvent(this, connection)
            );
          }

if (waitQueueMember.timer) {
            clearTimeout(waitQueueMember.timer);
          }
          waitQueueMember.callback(err, connection);
        }
        process.nextTick(() => this.processWaitQueue());
      });
    }
    this[kProcessingWaitQueue] = false;
  }
}

/**
 * A callback provided to `withConnection`
 * @internal
 *
 * @param error - An error instance representing the error during the execution.
 * @param connection - The managed connection which was checked out of the pool.
 * @param callback - A function to call back after connection management is complete
 */
export type WithConnectionCallback = (
  error: MongoError | undefined,
  connection: Connection | undefined,
  callback: Callback<Connection>
) => void;
PK������O[?�-��������wire_protocol/constants.tsnu�ȯ����������export const MIN_SUPPORTED_SERVER_VERSION = '3.6';
export const MAX_SUPPORTED_SERVER_VERSION = '6.0';
export const MIN_SUPPORTED_WIRE_VERSION = 6;
export const MAX_SUPPORTED_WIRE_VERSION = 17;
export const OP_REPLY = 1;
export const OP_UPDATE = 2001;
export const OP_INSERT = 2002;
export const OP_QUERY = 2004;
export const OP_DELETE = 2006;
export const OP_COMPRESSED = 2012;
export const OP_MSG = 2013;
PK������O[����u��u����wire_protocol/shared.tsnu�ȯ����������import type { Document } from '../../bson';
import { MongoInvalidArgumentError } from '../../error';
import type { ReadPreferenceLike } from '../../read_preference';
import { ReadPreference } from '../../read_preference';
import { ServerType } from '../../sdam/common';
import type { Server } from '../../sdam/server';
import type { ServerDescription } from '../../sdam/server_description';
import type { Topology } from '../../sdam/topology';
import { TopologyDescription } from '../../sdam/topology_description';
import type { OpQueryOptions } from '../commands';
import type { CommandOptions, Connection } from '../connection';

export interface ReadPreferenceOption {
  readPreference?: ReadPreferenceLike;
}

export function getReadPreference(cmd: Document, options?: ReadPreferenceOption): ReadPreference {
  // Default to command version of the readPreference
  let readPreference = cmd.readPreference || ReadPreference.primary;
  // If we have an option readPreference override the command one
  if (options?.readPreference) {
    readPreference = options.readPreference;
  }

if (typeof readPreference === 'string') {
    readPreference = ReadPreference.fromString(readPreference);
  }

if (!(readPreference instanceof ReadPreference)) {
    throw new MongoInvalidArgumentError(
      'Option "readPreference" must be a ReadPreference instance'
    );
  }

return readPreference;
}

export function applyCommonQueryOptions(
  queryOptions: OpQueryOptions,
  options: CommandOptions
): CommandOptions {
  Object.assign(queryOptions, {
    raw: typeof options.raw === 'boolean' ? options.raw : false,
    promoteLongs: typeof options.promoteLongs === 'boolean' ? options.promoteLongs : true,
    promoteValues: typeof options.promoteValues === 'boolean' ? options.promoteValues : true,
    promoteBuffers: typeof options.promoteBuffers === 'boolean' ? options.promoteBuffers : false,
    bsonRegExp: typeof options.bsonRegExp === 'boolean' ? options.bsonRegExp : false,
    enableUtf8Validation:
      typeof options.enableUtf8Validation === 'boolean' ? options.enableUtf8Validation : true
  });

if (options.session) {
    queryOptions.session = options.session;
  }

return queryOptions;
}

export function isSharded(topologyOrServer?: Topology | Server | Connection): boolean {
  if (topologyOrServer == null) {
    return false;
  }

if (topologyOrServer.description && topologyOrServer.description.type === ServerType.Mongos) {
    return true;
  }

// NOTE: This is incredibly inefficient, and should be removed once command construction
  //       happens based on `Server` not `Topology`.
  if (topologyOrServer.description && topologyOrServer.description instanceof TopologyDescription) {
    const servers: ServerDescription[] = Array.from(topologyOrServer.description.servers.values());
    return servers.some((server: ServerDescription) => server.type === ServerType.Mongos);
  }

return false;
}
PK������O[�T�J��J����wire_protocol/compression.tsnu�ȯ����������import * as zlib from 'zlib';

import { LEGACY_HELLO_COMMAND } from '../../constants';
import { PKG_VERSION, Snappy, ZStandard } from '../../deps';
import { MongoDecompressionError, MongoInvalidArgumentError } from '../../error';
import type { Callback } from '../../utils';
import type { OperationDescription } from '../message_stream';

/** @public */
export const Compressor = Object.freeze({
  none: 0,
  snappy: 1,
  zlib: 2,
  zstd: 3
} as const);

/** @public */
export type Compressor = typeof Compressor[CompressorName];

/** @public */
export type CompressorName = keyof typeof Compressor;

export const uncompressibleCommands = new Set([
  LEGACY_HELLO_COMMAND,
  'saslStart',
  'saslContinue',
  'getnonce',
  'authenticate',
  'createUser',
  'updateUser',
  'copydbSaslStart',
  'copydbgetnonce',
  'copydb'
]);

const MAX_COMPRESSOR_ID = 3;
const ZSTD_COMPRESSION_LEVEL = 3;

// Facilitate compressing a message using an agreed compressor
export function compress(
  self: { options: OperationDescription & zlib.ZlibOptions },
  dataToBeCompressed: Buffer,
  callback: Callback<Buffer>
): void {
  const zlibOptions = {} as zlib.ZlibOptions;
  switch (self.options.agreedCompressor) {
    case 'snappy': {
      if ('kModuleError' in Snappy) {
        return callback(Snappy['kModuleError']);
      }

if (Snappy[PKG_VERSION].major <= 6) {
        Snappy.compress(dataToBeCompressed, callback);
      } else {
        Snappy.compress(dataToBeCompressed).then(
          buffer => callback(undefined, buffer),
          error => callback(error)
        );
      }
      break;
    }
    case 'zlib':
      // Determine zlibCompressionLevel
      if (self.options.zlibCompressionLevel) {
        zlibOptions.level = self.options.zlibCompressionLevel;
      }
      zlib.deflate(dataToBeCompressed, zlibOptions, callback as zlib.CompressCallback);
      break;
    case 'zstd':
      if ('kModuleError' in ZStandard) {
        return callback(ZStandard['kModuleError']);
      }
      ZStandard.compress(dataToBeCompressed, ZSTD_COMPRESSION_LEVEL).then(
        buffer => callback(undefined, buffer),
        error => callback(error)
      );
      break;
    default:
      throw new MongoInvalidArgumentError(
        `Unknown compressor ${self.options.agreedCompressor} failed to compress`
      );
  }
}

// Decompress a message using the given compressor
export function decompress(
  compressorID: Compressor,
  compressedData: Buffer,
  callback: Callback<Buffer>
): void {
  if (compressorID < 0 || compressorID > MAX_COMPRESSOR_ID) {
    throw new MongoDecompressionError(
      `Server sent message compressed using an unsupported compressor. (Received compressor ID ${compressorID})`
    );
  }

switch (compressorID) {
    case Compressor.snappy: {
      if ('kModuleError' in Snappy) {
        return callback(Snappy['kModuleError']);
      }

if (Snappy[PKG_VERSION].major <= 6) {
        Snappy.uncompress(compressedData, { asBuffer: true }, callback);
      } else {
        Snappy.uncompress(compressedData, { asBuffer: true }).then(
          buffer => callback(undefined, buffer),
          error => callback(error)
        );
      }
      break;
    }
    case Compressor.zstd: {
      if ('kModuleError' in ZStandard) {
        return callback(ZStandard['kModuleError']);
      }

ZStandard.decompress(compressedData).then(
        buffer => callback(undefined, buffer),
        error => callback(error)
      );
      break;
    }
    case Compressor.zlib:
      zlib.inflate(compressedData, callback as zlib.CompressCallback);
      break;
    default:
      callback(undefined, compressedData);
  }
}
PK������O[�asSR��R����commands.tsnu�ȯ����������import type { BSONSerializeOptions, Document, Long } from '../bson';
import * as BSON from '../bson';
import { MongoInvalidArgumentError, MongoRuntimeError } from '../error';
import { ReadPreference } from '../read_preference';
import type { ClientSession } from '../sessions';
import { databaseNamespace } from '../utils';
import type { CommandOptions } from './connection';
import { OP_MSG, OP_QUERY } from './wire_protocol/constants';

// Incrementing request id
let _requestId = 0;

// Query flags
const OPTS_TAILABLE_CURSOR = 2;
const OPTS_SECONDARY = 4;
const OPTS_OPLOG_REPLAY = 8;
const OPTS_NO_CURSOR_TIMEOUT = 16;
const OPTS_AWAIT_DATA = 32;
const OPTS_EXHAUST = 64;
const OPTS_PARTIAL = 128;

// Response flags
const CURSOR_NOT_FOUND = 1;
const QUERY_FAILURE = 2;
const SHARD_CONFIG_STALE = 4;
const AWAIT_CAPABLE = 8;

/** @internal */
export type WriteProtocolMessageType = Query | Msg;

/** @internal */
export interface OpQueryOptions extends CommandOptions {
  socketTimeoutMS?: number;
  session?: ClientSession;
  documentsReturnedIn?: string;
  numberToSkip?: number;
  numberToReturn?: number;
  returnFieldSelector?: Document;
  pre32Limit?: number;
  serializeFunctions?: boolean;
  ignoreUndefined?: boolean;
  maxBsonSize?: number;
  checkKeys?: boolean;
  secondaryOk?: boolean;

requestId?: number;
  moreToCome?: boolean;
  exhaustAllowed?: boolean;
  readPreference?: ReadPreference;
}

/**************************************************************
 * QUERY
 **************************************************************/
/** @internal */
export class Query {
  ns: string;
  query: Document;
  numberToSkip: number;
  numberToReturn: number;
  returnFieldSelector?: Document;
  requestId: number;
  pre32Limit?: number;
  serializeFunctions: boolean;
  ignoreUndefined: boolean;
  maxBsonSize: number;
  checkKeys: boolean;
  batchSize: number;
  tailable: boolean;
  secondaryOk: boolean;
  oplogReplay: boolean;
  noCursorTimeout: boolean;
  awaitData: boolean;
  exhaust: boolean;
  partial: boolean;
  documentsReturnedIn?: string;

constructor(ns: string, query: Document, options: OpQueryOptions) {
    // Basic options needed to be passed in
    // TODO(NODE-3483): Replace with MongoCommandError
    if (ns == null) throw new MongoRuntimeError('Namespace must be specified for query');
    // TODO(NODE-3483): Replace with MongoCommandError
    if (query == null) throw new MongoRuntimeError('A query document must be specified for query');

// Validate that we are not passing 0x00 in the collection name
    if (ns.indexOf('\x00') !== -1) {
      // TODO(NODE-3483): Use MongoNamespace static method
      throw new MongoRuntimeError('Namespace cannot contain a null character');
    }

// Basic options
    this.ns = ns;
    this.query = query;

// Additional options
    this.numberToSkip = options.numberToSkip || 0;
    this.numberToReturn = options.numberToReturn || 0;
    this.returnFieldSelector = options.returnFieldSelector || undefined;
    this.requestId = Query.getRequestId();

// special case for pre-3.2 find commands, delete ASAP
    this.pre32Limit = options.pre32Limit;

// Serialization option
    this.serializeFunctions =
      typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
    this.ignoreUndefined =
      typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : false;
    this.maxBsonSize = options.maxBsonSize || 1024 * 1024 * 16;
    this.checkKeys = typeof options.checkKeys === 'boolean' ? options.checkKeys : false;
    this.batchSize = this.numberToReturn;

// Flags
    this.tailable = false;
    this.secondaryOk = typeof options.secondaryOk === 'boolean' ? options.secondaryOk : false;
    this.oplogReplay = false;
    this.noCursorTimeout = false;
    this.awaitData = false;
    this.exhaust = false;
    this.partial = false;
  }

/** Assign next request Id. */
  incRequestId(): void {
    this.requestId = _requestId++;
  }

/** Peek next request Id. */
  nextRequestId(): number {
    return _requestId + 1;
  }

/** Increment then return next request Id. */
  static getRequestId(): number {
    return ++_requestId;
  }

// Uses a single allocated buffer for the process, avoiding multiple memory allocations
  toBin(): Buffer[] {
    const buffers = [];
    let projection = null;

// Set up the flags
    let flags = 0;
    if (this.tailable) {
      flags |= OPTS_TAILABLE_CURSOR;
    }

if (this.secondaryOk) {
      flags |= OPTS_SECONDARY;
    }

if (this.oplogReplay) {
      flags |= OPTS_OPLOG_REPLAY;
    }

if (this.noCursorTimeout) {
      flags |= OPTS_NO_CURSOR_TIMEOUT;
    }

if (this.awaitData) {
      flags |= OPTS_AWAIT_DATA;
    }

if (this.exhaust) {
      flags |= OPTS_EXHAUST;
    }

if (this.partial) {
      flags |= OPTS_PARTIAL;
    }

// If batchSize is different to this.numberToReturn
    if (this.batchSize !== this.numberToReturn) this.numberToReturn = this.batchSize;

// Allocate write protocol header buffer
    const header = Buffer.alloc(
      4 * 4 + // Header
        4 + // Flags
        Buffer.byteLength(this.ns) +
        1 + // namespace
        4 + // numberToSkip
        4 // numberToReturn
    );

// Add header to buffers
    buffers.push(header);

// Serialize the query
    const query = BSON.serialize(this.query, {
      checkKeys: this.checkKeys,
      serializeFunctions: this.serializeFunctions,
      ignoreUndefined: this.ignoreUndefined
    });

// Add query document
    buffers.push(query);

if (this.returnFieldSelector && Object.keys(this.returnFieldSelector).length > 0) {
      // Serialize the projection document
      projection = BSON.serialize(this.returnFieldSelector, {
        checkKeys: this.checkKeys,
        serializeFunctions: this.serializeFunctions,
        ignoreUndefined: this.ignoreUndefined
      });
      // Add projection document
      buffers.push(projection);
    }

// Total message size
    const totalLength = header.length + query.length + (projection ? projection.length : 0);

// Set up the index
    let index = 4;

// Write total document length
    header[3] = (totalLength >> 24) & 0xff;
    header[2] = (totalLength >> 16) & 0xff;
    header[1] = (totalLength >> 8) & 0xff;
    header[0] = totalLength & 0xff;

// Write header information requestId
    header[index + 3] = (this.requestId >> 24) & 0xff;
    header[index + 2] = (this.requestId >> 16) & 0xff;
    header[index + 1] = (this.requestId >> 8) & 0xff;
    header[index] = this.requestId & 0xff;
    index = index + 4;

// Write header information responseTo
    header[index + 3] = (0 >> 24) & 0xff;
    header[index + 2] = (0 >> 16) & 0xff;
    header[index + 1] = (0 >> 8) & 0xff;
    header[index] = 0 & 0xff;
    index = index + 4;

// Write header information OP_QUERY
    header[index + 3] = (OP_QUERY >> 24) & 0xff;
    header[index + 2] = (OP_QUERY >> 16) & 0xff;
    header[index + 1] = (OP_QUERY >> 8) & 0xff;
    header[index] = OP_QUERY & 0xff;
    index = index + 4;

// Write header information flags
    header[index + 3] = (flags >> 24) & 0xff;
    header[index + 2] = (flags >> 16) & 0xff;
    header[index + 1] = (flags >> 8) & 0xff;
    header[index] = flags & 0xff;
    index = index + 4;

// Write collection name
    index = index + header.write(this.ns, index, 'utf8') + 1;
    header[index - 1] = 0;

// Write header information flags numberToSkip
    header[index + 3] = (this.numberToSkip >> 24) & 0xff;
    header[index + 2] = (this.numberToSkip >> 16) & 0xff;
    header[index + 1] = (this.numberToSkip >> 8) & 0xff;
    header[index] = this.numberToSkip & 0xff;
    index = index + 4;

// Write header information flags numberToReturn
    header[index + 3] = (this.numberToReturn >> 24) & 0xff;
    header[index + 2] = (this.numberToReturn >> 16) & 0xff;
    header[index + 1] = (this.numberToReturn >> 8) & 0xff;
    header[index] = this.numberToReturn & 0xff;
    index = index + 4;

// Return the buffers
    return buffers;
  }
}

/** @internal */
export interface MessageHeader {
  length: number;
  requestId: number;
  responseTo: number;
  opCode: number;
  fromCompressed?: boolean;
}

/** @internal */
export interface OpResponseOptions extends BSONSerializeOptions {
  documentsReturnedIn?: string | null;
}

/** @internal */
export class Response {
  parsed: boolean;
  raw: Buffer;
  data: Buffer;
  opts: OpResponseOptions;
  length: number;
  requestId: number;
  responseTo: number;
  opCode: number;
  fromCompressed?: boolean;
  responseFlags?: number;
  cursorId?: Long;
  startingFrom?: number;
  numberReturned?: number;
  documents: (Document | Buffer)[] = new Array(0);
  cursorNotFound?: boolean;
  queryFailure?: boolean;
  shardConfigStale?: boolean;
  awaitCapable?: boolean;
  promoteLongs: boolean;
  promoteValues: boolean;
  promoteBuffers: boolean;
  bsonRegExp?: boolean;
  index?: number;

constructor(
    message: Buffer,
    msgHeader: MessageHeader,
    msgBody: Buffer,
    opts?: OpResponseOptions
  ) {
    this.parsed = false;
    this.raw = message;
    this.data = msgBody;
    this.opts = opts ?? {
      promoteLongs: true,
      promoteValues: true,
      promoteBuffers: false,
      bsonRegExp: false
    };

// Read the message header
    this.length = msgHeader.length;
    this.requestId = msgHeader.requestId;
    this.responseTo = msgHeader.responseTo;
    this.opCode = msgHeader.opCode;
    this.fromCompressed = msgHeader.fromCompressed;

// Flag values
    this.promoteLongs = typeof this.opts.promoteLongs === 'boolean' ? this.opts.promoteLongs : true;
    this.promoteValues =
      typeof this.opts.promoteValues === 'boolean' ? this.opts.promoteValues : true;
    this.promoteBuffers =
      typeof this.opts.promoteBuffers === 'boolean' ? this.opts.promoteBuffers : false;
    this.bsonRegExp = typeof this.opts.bsonRegExp === 'boolean' ? this.opts.bsonRegExp : false;
  }

isParsed(): boolean {
    return this.parsed;
  }

parse(options: OpResponseOptions): void {
    // Don't parse again if not needed
    if (this.parsed) return;
    options = options ?? {};

// Allow the return of raw documents instead of parsing
    const raw = options.raw || false;
    const documentsReturnedIn = options.documentsReturnedIn || null;
    const promoteLongs = options.promoteLongs ?? this.opts.promoteLongs;
    const promoteValues = options.promoteValues ?? this.opts.promoteValues;
    const promoteBuffers = options.promoteBuffers ?? this.opts.promoteBuffers;
    const bsonRegExp = options.bsonRegExp ?? this.opts.bsonRegExp;
    let bsonSize;

// Set up the options
    const _options: BSONSerializeOptions = {
      promoteLongs,
      promoteValues,
      promoteBuffers,
      bsonRegExp
    };

// Position within OP_REPLY at which documents start
    // (See https://docs.mongodb.com/manual/reference/mongodb-wire-protocol/#wire-op-reply)
    this.index = 20;

// Read the message body
    this.responseFlags = this.data.readInt32LE(0);
    this.cursorId = new BSON.Long(this.data.readInt32LE(4), this.data.readInt32LE(8));
    this.startingFrom = this.data.readInt32LE(12);
    this.numberReturned = this.data.readInt32LE(16);

// Preallocate document array
    this.documents = new Array(this.numberReturned);

this.cursorNotFound = (this.responseFlags & CURSOR_NOT_FOUND) !== 0;
    this.queryFailure = (this.responseFlags & QUERY_FAILURE) !== 0;
    this.shardConfigStale = (this.responseFlags & SHARD_CONFIG_STALE) !== 0;
    this.awaitCapable = (this.responseFlags & AWAIT_CAPABLE) !== 0;

// Parse Body
    for (let i = 0; i < this.numberReturned; i++) {
      bsonSize =
        this.data[this.index] |
        (this.data[this.index + 1] << 8) |
        (this.data[this.index + 2] << 16) |
        (this.data[this.index + 3] << 24);

// If we have raw results specified slice the return document
      if (raw) {
        this.documents[i] = this.data.slice(this.index, this.index + bsonSize);
      } else {
        this.documents[i] = BSON.deserialize(
          this.data.slice(this.index, this.index + bsonSize),
          _options
        );
      }

// Adjust the index
      this.index = this.index + bsonSize;
    }

if (this.documents.length === 1 && documentsReturnedIn != null && raw) {
      const fieldsAsRaw: Document = {};
      fieldsAsRaw[documentsReturnedIn] = true;
      _options.fieldsAsRaw = fieldsAsRaw;

const doc = BSON.deserialize(this.documents[0] as Buffer, _options);
      this.documents = [doc];
    }

// Set parsed
    this.parsed = true;
  }
}

// Implementation of OP_MSG spec:
// https://github.com/mongodb/specifications/blob/master/source/message/OP_MSG.rst
//
// struct Section {
//   uint8 payloadType;
//   union payload {
//       document  document; // payloadType == 0
//       struct sequence { // payloadType == 1
//           int32      size;
//           cstring    identifier;
//           document*  documents;
//       };
//   };
// };

// struct OP_MSG {
//   struct MsgHeader {
//       int32  messageLength;
//       int32  requestID;
//       int32  responseTo;
//       int32  opCode = 2013;
//   };
//   uint32      flagBits;
//   Section+    sections;
//   [uint32     checksum;]
// };

// Msg Flags
const OPTS_CHECKSUM_PRESENT = 1;
const OPTS_MORE_TO_COME = 2;
const OPTS_EXHAUST_ALLOWED = 1 << 16;

/** @internal */
export interface OpMsgOptions {
  requestId: number;
  serializeFunctions: boolean;
  ignoreUndefined: boolean;
  checkKeys: boolean;
  maxBsonSize: number;
  moreToCome: boolean;
  exhaustAllowed: boolean;
  readPreference: ReadPreference;
}

/** @internal */
export class Msg {
  ns: string;
  command: Document;
  options: OpQueryOptions;
  requestId: number;
  serializeFunctions: boolean;
  ignoreUndefined: boolean;
  checkKeys: boolean;
  maxBsonSize: number;
  checksumPresent: boolean;
  moreToCome: boolean;
  exhaustAllowed: boolean;

constructor(ns: string, command: Document, options: OpQueryOptions) {
    // Basic options needed to be passed in
    if (command == null)
      throw new MongoInvalidArgumentError('Query document must be specified for query');

// Basic options
    this.ns = ns;
    this.command = command;
    this.command.$db = databaseNamespace(ns);

if (options.readPreference && options.readPreference.mode !== ReadPreference.PRIMARY) {
      this.command.$readPreference = options.readPreference.toJSON();
    }

// Ensure empty options
    this.options = options ?? {};

// Additional options
    this.requestId = options.requestId ? options.requestId : Msg.getRequestId();

// Serialization option
    this.serializeFunctions =
      typeof options.serializeFunctions === 'boolean' ? options.serializeFunctions : false;
    this.ignoreUndefined =
      typeof options.ignoreUndefined === 'boolean' ? options.ignoreUndefined : false;
    this.checkKeys = typeof options.checkKeys === 'boolean' ? options.checkKeys : false;
    this.maxBsonSize = options.maxBsonSize || 1024 * 1024 * 16;

// flags
    this.checksumPresent = false;
    this.moreToCome = options.moreToCome || false;
    this.exhaustAllowed =
      typeof options.exhaustAllowed === 'boolean' ? options.exhaustAllowed : false;
  }

toBin(): Buffer[] {
    const buffers: Buffer[] = [];
    let flags = 0;

if (this.checksumPresent) {
      flags |= OPTS_CHECKSUM_PRESENT;
    }

if (this.moreToCome) {
      flags |= OPTS_MORE_TO_COME;
    }

if (this.exhaustAllowed) {
      flags |= OPTS_EXHAUST_ALLOWED;
    }

const header = Buffer.alloc(
      4 * 4 + // Header
        4 // Flags
    );

buffers.push(header);

let totalLength = header.length;
    const command = this.command;
    totalLength += this.makeDocumentSegment(buffers, command);

header.writeInt32LE(totalLength, 0); // messageLength
    header.writeInt32LE(this.requestId, 4); // requestID
    header.writeInt32LE(0, 8); // responseTo
    header.writeInt32LE(OP_MSG, 12); // opCode
    header.writeUInt32LE(flags, 16); // flags
    return buffers;
  }

makeDocumentSegment(buffers: Buffer[], document: Document): number {
    const payloadTypeBuffer = Buffer.alloc(1);
    payloadTypeBuffer[0] = 0;

const documentBuffer = this.serializeBson(document);
    buffers.push(payloadTypeBuffer);
    buffers.push(documentBuffer);

return payloadTypeBuffer.length + documentBuffer.length;
  }

serializeBson(document: Document): Buffer {
    return BSON.serialize(document, {
      checkKeys: this.checkKeys,
      serializeFunctions: this.serializeFunctions,
      ignoreUndefined: this.ignoreUndefined
    });
  }

static getRequestId(): number {
    _requestId = (_requestId + 1) & 0x7fffffff;
    return _requestId;
  }
}

/** @internal */
export class BinMsg {
  parsed: boolean;
  raw: Buffer;
  data: Buffer;
  opts: OpResponseOptions;
  length: number;
  requestId: number;
  responseTo: number;
  opCode: number;
  fromCompressed?: boolean;
  responseFlags: number;
  checksumPresent: boolean;
  moreToCome: boolean;
  exhaustAllowed: boolean;
  promoteLongs: boolean;
  promoteValues: boolean;
  promoteBuffers: boolean;
  bsonRegExp: boolean;
  documents: (Document | Buffer)[];
  index?: number;

// Read response flags
    this.responseFlags = msgBody.readInt32LE(0);
    this.checksumPresent = (this.responseFlags & OPTS_CHECKSUM_PRESENT) !== 0;
    this.moreToCome = (this.responseFlags & OPTS_MORE_TO_COME) !== 0;
    this.exhaustAllowed = (this.responseFlags & OPTS_EXHAUST_ALLOWED) !== 0;
    this.promoteLongs = typeof this.opts.promoteLongs === 'boolean' ? this.opts.promoteLongs : true;
    this.promoteValues =
      typeof this.opts.promoteValues === 'boolean' ? this.opts.promoteValues : true;
    this.promoteBuffers =
      typeof this.opts.promoteBuffers === 'boolean' ? this.opts.promoteBuffers : false;
    this.bsonRegExp = typeof this.opts.bsonRegExp === 'boolean' ? this.opts.bsonRegExp : false;

this.documents = [];
  }

isParsed(): boolean {
    return this.parsed;
  }

parse(options: OpResponseOptions): void {
    // Don't parse again if not needed
    if (this.parsed) return;
    options = options ?? {};

this.index = 4;
    // Allow the return of raw documents instead of parsing
    const raw = options.raw || false;
    const documentsReturnedIn = options.documentsReturnedIn || null;
    const promoteLongs = options.promoteLongs ?? this.opts.promoteLongs;
    const promoteValues = options.promoteValues ?? this.opts.promoteValues;
    const promoteBuffers = options.promoteBuffers ?? this.opts.promoteBuffers;
    const bsonRegExp = options.bsonRegExp ?? this.opts.bsonRegExp;
    const validation = this.parseBsonSerializationOptions(options);

// Set up the options
    const bsonOptions: BSONSerializeOptions = {
      promoteLongs,
      promoteValues,
      promoteBuffers,
      bsonRegExp,
      validation
      // Due to the strictness of the BSON libraries validation option we need this cast
    } as BSONSerializeOptions & { validation: { utf8: { writeErrors: boolean } } };

while (this.index < this.data.length) {
      const payloadType = this.data.readUInt8(this.index++);
      if (payloadType === 0) {
        const bsonSize = this.data.readUInt32LE(this.index);
        const bin = this.data.slice(this.index, this.index + bsonSize);
        this.documents.push(raw ? bin : BSON.deserialize(bin, bsonOptions));
        this.index += bsonSize;
      } else if (payloadType === 1) {
        // It was decided that no driver makes use of payload type 1

// TODO(NODE-3483): Replace with MongoDeprecationError
        throw new MongoRuntimeError('OP_MSG Payload Type 1 detected unsupported protocol');
      }
    }

if (this.documents.length === 1 && documentsReturnedIn != null && raw) {
      const fieldsAsRaw: Document = {};
      fieldsAsRaw[documentsReturnedIn] = true;
      bsonOptions.fieldsAsRaw = fieldsAsRaw;
      const doc = BSON.deserialize(this.documents[0] as Buffer, bsonOptions);
      this.documents = [doc];
    }

this.parsed = true;
  }

parseBsonSerializationOptions({ enableUtf8Validation }: BSONSerializeOptions): {
    utf8: { writeErrors: false } | false;
  } {
    if (enableUtf8Validation === false) {
      return { utf8: false };
    }

return { utf8: { writeErrors: false } };
  }
}
PK������O[{��������auth/mongo_credentials.tsnu�ȯ����������// Resolves the default auth mechanism according to
import type { Document } from '../../bson';
import { MongoAPIError, MongoMissingCredentialsError } from '../../error';
import { emitWarningOnce } from '../../utils';
import { GSSAPICanonicalizationValue } from './gssapi';
import { AUTH_MECHS_AUTH_SRC_EXTERNAL, AuthMechanism } from './providers';

// https://github.com/mongodb/specifications/blob/master/source/auth/auth.rst
function getDefaultAuthMechanism(hello?: Document): AuthMechanism {
  if (hello) {
    // If hello contains saslSupportedMechs, use scram-sha-256
    // if it is available, else scram-sha-1
    if (Array.isArray(hello.saslSupportedMechs)) {
      return hello.saslSupportedMechs.includes(AuthMechanism.MONGODB_SCRAM_SHA256)
        ? AuthMechanism.MONGODB_SCRAM_SHA256
        : AuthMechanism.MONGODB_SCRAM_SHA1;
    }

// Fallback to legacy selection method. If wire version >= 3, use scram-sha-1
    if (hello.maxWireVersion >= 3) {
      return AuthMechanism.MONGODB_SCRAM_SHA1;
    }
  }

// Default for wireprotocol < 3
  return AuthMechanism.MONGODB_CR;
}

/** @public */
export interface AuthMechanismProperties extends Document {
  SERVICE_HOST?: string;
  SERVICE_NAME?: string;
  SERVICE_REALM?: string;
  CANONICALIZE_HOST_NAME?: GSSAPICanonicalizationValue;
  AWS_SESSION_TOKEN?: string;
}

/** @public */
export interface MongoCredentialsOptions {
  username: string;
  password: string;
  source: string;
  db?: string;
  mechanism?: AuthMechanism;
  mechanismProperties: AuthMechanismProperties;
}

/**
 * A representation of the credentials used by MongoDB
 * @public
 */
export class MongoCredentials {
  /** The username used for authentication */
  readonly username: string;
  /** The password used for authentication */
  readonly password: string;
  /** The database that the user should authenticate against */
  readonly source: string;
  /** The method used to authenticate */
  readonly mechanism: AuthMechanism;
  /** Special properties used by some types of auth mechanisms */
  readonly mechanismProperties: AuthMechanismProperties;

constructor(options: MongoCredentialsOptions) {
    this.username = options.username;
    this.password = options.password;
    this.source = options.source;
    if (!this.source && options.db) {
      this.source = options.db;
    }
    this.mechanism = options.mechanism || AuthMechanism.MONGODB_DEFAULT;
    this.mechanismProperties = options.mechanismProperties || {};

if (this.mechanism.match(/MONGODB-AWS/i)) {
      if (!this.username && process.env.AWS_ACCESS_KEY_ID) {
        this.username = process.env.AWS_ACCESS_KEY_ID;
      }

if (!this.password && process.env.AWS_SECRET_ACCESS_KEY) {
        this.password = process.env.AWS_SECRET_ACCESS_KEY;
      }

if (
        this.mechanismProperties.AWS_SESSION_TOKEN == null &&
        process.env.AWS_SESSION_TOKEN != null
      ) {
        this.mechanismProperties = {
          ...this.mechanismProperties,
          AWS_SESSION_TOKEN: process.env.AWS_SESSION_TOKEN
        };
      }
    }

if ('gssapiCanonicalizeHostName' in this.mechanismProperties) {
      emitWarningOnce(
        'gssapiCanonicalizeHostName is deprecated. Please use CANONICALIZE_HOST_NAME instead.'
      );
      this.mechanismProperties.CANONICALIZE_HOST_NAME =
        this.mechanismProperties.gssapiCanonicalizeHostName;
    }

Object.freeze(this.mechanismProperties);
    Object.freeze(this);
  }

/** Determines if two MongoCredentials objects are equivalent */
  equals(other: MongoCredentials): boolean {
    return (
      this.mechanism === other.mechanism &&
      this.username === other.username &&
      this.password === other.password &&
      this.source === other.source
    );
  }

/**
   * If the authentication mechanism is set to "default", resolves the authMechanism
   * based on the server version and server supported sasl mechanisms.
   *
   * @param hello - A hello response from the server
   */
  resolveAuthMechanism(hello?: Document): MongoCredentials {
    // If the mechanism is not "default", then it does not need to be resolved
    if (this.mechanism.match(/DEFAULT/i)) {
      return new MongoCredentials({
        username: this.username,
        password: this.password,
        source: this.source,
        mechanism: getDefaultAuthMechanism(hello),
        mechanismProperties: this.mechanismProperties
      });
    }

return this;
  }

validate(): void {
    if (
      (this.mechanism === AuthMechanism.MONGODB_GSSAPI ||
        this.mechanism === AuthMechanism.MONGODB_CR ||
        this.mechanism === AuthMechanism.MONGODB_PLAIN ||
        this.mechanism === AuthMechanism.MONGODB_SCRAM_SHA1 ||
        this.mechanism === AuthMechanism.MONGODB_SCRAM_SHA256) &&
      !this.username
    ) {
      throw new MongoMissingCredentialsError(`Username required for mechanism '${this.mechanism}'`);
    }

if (AUTH_MECHS_AUTH_SRC_EXTERNAL.has(this.mechanism)) {
      if (this.source != null && this.source !== '$external') {
        // TODO(NODE-3485): Replace this with a MongoAuthValidationError
        throw new MongoAPIError(
          `Invalid source '${this.source}' for mechanism '${this.mechanism}' specified.`
        );
      }
    }

if (this.mechanism === AuthMechanism.MONGODB_PLAIN && this.source == null) {
      // TODO(NODE-3485): Replace this with a MongoAuthValidationError
      throw new MongoAPIError('PLAIN Authentication Mechanism needs an auth source');
    }

if (this.mechanism === AuthMechanism.MONGODB_X509 && this.password != null) {
      if (this.password === '') {
        Reflect.set(this, 'password', undefined);
        return;
      }
      // TODO(NODE-3485): Replace this with a MongoAuthValidationError
      throw new MongoAPIError(`Password not allowed for mechanism MONGODB-X509`);
    }

const canonicalization = this.mechanismProperties.CANONICALIZE_HOST_NAME ?? false;
    if (!Object.values(GSSAPICanonicalizationValue).includes(canonicalization)) {
      throw new MongoAPIError(`Invalid CANONICALIZE_HOST_NAME value: ${canonicalization}`);
    }
  }

static merge(
    creds: MongoCredentials | undefined,
    options: Partial<MongoCredentialsOptions>
  ): MongoCredentials {
    return new MongoCredentials({
      username: options.username ?? creds?.username ?? '',
      password: options.password ?? creds?.password ?? '',
      mechanism: options.mechanism ?? creds?.mechanism ?? AuthMechanism.MONGODB_DEFAULT,
      mechanismProperties: options.mechanismProperties ?? creds?.mechanismProperties ?? {},
      source: options.source ?? options.db ?? creds?.source ?? 'admin'
    });
  }
}
PK������O[�]��]����auth/gssapi.tsnu�ȯ����������import * as dns from 'dns';

import type { Document } from '../../bson';
import { Kerberos, KerberosClient } from '../../deps';
import {
  MongoError,
  MongoInvalidArgumentError,
  MongoMissingCredentialsError,
  MongoMissingDependencyError,
  MongoRuntimeError
} from '../../error';
import { Callback, ns } from '../../utils';
import { AuthContext, AuthProvider } from './auth_provider';

/** @public */
export const GSSAPICanonicalizationValue = Object.freeze({
  on: true,
  off: false,
  none: 'none',
  forward: 'forward',
  forwardAndReverse: 'forwardAndReverse'
} as const);

/** @public */
export type GSSAPICanonicalizationValue =
  typeof GSSAPICanonicalizationValue[keyof typeof GSSAPICanonicalizationValue];

type MechanismProperties = {
  /** @deprecated use `CANONICALIZE_HOST_NAME` instead */
  gssapiCanonicalizeHostName?: boolean;
  CANONICALIZE_HOST_NAME?: GSSAPICanonicalizationValue;
  SERVICE_HOST?: string;
  SERVICE_NAME?: string;
  SERVICE_REALM?: string;
};

export class GSSAPI extends AuthProvider {
  override auth(authContext: AuthContext, callback: Callback): void {
    const { connection, credentials } = authContext;
    if (credentials == null)
      return callback(
        new MongoMissingCredentialsError('Credentials required for GSSAPI authentication')
      );
    const { username } = credentials;
    function externalCommand(
      command: Document,
      cb: Callback<{ payload: string; conversationId: any }>
    ) {
      return connection.command(ns('$external.$cmd'), command, undefined, cb);
    }
    makeKerberosClient(authContext, (err, client) => {
      if (err) return callback(err);
      if (client == null) return callback(new MongoMissingDependencyError('GSSAPI client missing'));
      client.step('', (err, payload) => {
        if (err) return callback(err);

externalCommand(saslStart(payload), (err, result) => {
          if (err) return callback(err);
          if (result == null) return callback();
          negotiate(client, 10, result.payload, (err, payload) => {
            if (err) return callback(err);

externalCommand(saslContinue(payload, result.conversationId), (err, result) => {
              if (err) return callback(err);
              if (result == null) return callback();
              finalize(client, username, result.payload, (err, payload) => {
                if (err) return callback(err);

externalCommand(
                  {
                    saslContinue: 1,
                    conversationId: result.conversationId,
                    payload
                  },
                  (err, result) => {
                    if (err) return callback(err);

callback(undefined, result);
                  }
                );
              });
            });
          });
        });
      });
    });
  }
}

if ('kModuleError' in Kerberos) {
    return callback(Kerberos['kModuleError']);
  }
  const { initializeClient } = Kerberos;

const { username, password } = credentials;
  const mechanismProperties = credentials.mechanismProperties as MechanismProperties;

const serviceName = mechanismProperties.SERVICE_NAME ?? 'mongodb';

performGSSAPICanonicalizeHostName(
    hostAddress.host,
    mechanismProperties,
    (err?: Error | MongoError, host?: string) => {
      if (err) return callback(err);

const initOptions = {};
      if (password != null) {
        Object.assign(initOptions, { user: username, password: password });
      }

initializeClient(spn, initOptions, (err: string, client: KerberosClient): void => {
        // TODO(NODE-3483)
        if (err) return callback(new MongoRuntimeError(err));
        callback(undefined, client);
      });
    }
  );
}

function saslStart(payload?: string): Document {
  return {
    saslStart: 1,
    mechanism: 'GSSAPI',
    payload,
    autoAuthorize: 1
  };
}

function saslContinue(payload?: string, conversationId?: number): Document {
  return {
    saslContinue: 1,
    conversationId,
    payload
  };
}

function negotiate(
  client: KerberosClient,
  retries: number,
  payload: string,
  callback: Callback<string>
): void {
  client.step(payload, (err, response) => {
    // Retries exhausted, raise error
    if (err && retries === 0) return callback(err);

// Adjust number of retries and call step again
    if (err) return negotiate(client, retries - 1, payload, callback);

// Return the payload
    callback(undefined, response || '');
  });
}

function finalize(
  client: KerberosClient,
  user: string,
  payload: string,
  callback: Callback<string>
): void {
  // GSS Client Unwrap
  client.unwrap(payload, (err, response) => {
    if (err) return callback(err);

// Wrap the response
    client.wrap(response || '', { user }, (err, wrapped) => {
      if (err) return callback(err);

// Return the payload
      callback(undefined, wrapped);
    });
  });
}

export function performGSSAPICanonicalizeHostName(
  host: string,
  mechanismProperties: MechanismProperties,
  callback: Callback<string>
): void {
  const mode = mechanismProperties.CANONICALIZE_HOST_NAME;
  if (!mode || mode === GSSAPICanonicalizationValue.none) {
    return callback(undefined, host);
  }

// If forward and reverse or true
  if (
    mode === GSSAPICanonicalizationValue.on ||
    mode === GSSAPICanonicalizationValue.forwardAndReverse
  ) {
    // Perform the lookup of the ip address.
    dns.lookup(host, (error, address) => {
      // No ip found, return the error.
      if (error) return callback(error);

// Perform a reverse ptr lookup on the ip address.
      dns.resolvePtr(address, (err, results) => {
        // This can error as ptr records may not exist for all ips. In this case
        // fallback to a cname lookup as dns.lookup() does not return the
        // cname.
        if (err) {
          return resolveCname(host, callback);
        }
        // If the ptr did not error but had no results, return the host.
        callback(undefined, results.length > 0 ? results[0] : host);
      });
    });
  } else {
    // The case for forward is just to resolve the cname as dns.lookup()
    // will not return it.
    resolveCname(host, callback);
  }
}

export function resolveCname(host: string, callback: Callback<string>): void {
  // Attempt to resolve the host name
  dns.resolveCname(host, (err, r) => {
    if (err) return callback(undefined, host);

// Get the first resolve host id
    if (r.length > 0) {
      return callback(undefined, r[0]);
    }

callback(undefined, host);
  });
}
PK������O[��hW��W����auth/providers.tsnu�ȯ����������/** @public */
export const AuthMechanism = Object.freeze({
  MONGODB_AWS: 'MONGODB-AWS',
  MONGODB_CR: 'MONGODB-CR',
  MONGODB_DEFAULT: 'DEFAULT',
  MONGODB_GSSAPI: 'GSSAPI',
  MONGODB_PLAIN: 'PLAIN',
  MONGODB_SCRAM_SHA1: 'SCRAM-SHA-1',
  MONGODB_SCRAM_SHA256: 'SCRAM-SHA-256',
  MONGODB_X509: 'MONGODB-X509'
} as const);

/** @public */
export type AuthMechanism = typeof AuthMechanism[keyof typeof AuthMechanism];

/** @internal */
export const AUTH_MECHS_AUTH_SRC_EXTERNAL = new Set<AuthMechanism>([
  AuthMechanism.MONGODB_GSSAPI,
  AuthMechanism.MONGODB_AWS,
  AuthMechanism.MONGODB_X509
]);
PK������O[�"���������auth/auth_provider.tsnu�ȯ����������import type { Document } from '../../bson';
import { MongoRuntimeError } from '../../error';
import type { Callback, ClientMetadataOptions } from '../../utils';
import type { HandshakeDocument } from '../connect';
import type { Connection, ConnectionOptions } from '../connection';
import type { MongoCredentials } from './mongo_credentials';

export type AuthContextOptions = ConnectionOptions & ClientMetadataOptions;

/** Context used during authentication */
export class AuthContext {
  /** The connection to authenticate */
  connection: Connection;
  /** The credentials to use for authentication */
  credentials?: MongoCredentials;
  /** The options passed to the `connect` method */
  options: AuthContextOptions;

/** A response from an initial auth attempt, only some mechanisms use this (e.g, SCRAM) */
  response?: Document;
  /** A random nonce generated for use in an authentication conversation */
  nonce?: Buffer;

constructor(
    connection: Connection,
    credentials: MongoCredentials | undefined,
    options: AuthContextOptions
  ) {
    this.connection = connection;
    this.credentials = credentials;
    this.options = options;
  }
}

export class AuthProvider {
  /**
   * Prepare the handshake document before the initial handshake.
   *
   * @param handshakeDoc - The document used for the initial handshake on a connection
   * @param authContext - Context for authentication flow
   */
  prepare(
    handshakeDoc: HandshakeDocument,
    authContext: AuthContext,
    callback: Callback<HandshakeDocument>
  ): void {
    callback(undefined, handshakeDoc);
  }

/**
   * Authenticate
   *
   * @param context - A shared context for authentication flow
   * @param callback - The callback to return the result from the authentication
   */
  auth(context: AuthContext, callback: Callback): void {
    // TODO(NODE-3483): Replace this with MongoMethodOverrideError
    callback(new MongoRuntimeError('`auth` method must be overridden by subclass'));
  }
}
PK������O[>���%���%����auth/mongodb_aws.tsnu�ȯ����������import * as crypto from 'crypto';
import * as http from 'http';
import * as url from 'url';

import type { Binary, BSONSerializeOptions } from '../../bson';
import * as BSON from '../../bson';
import { aws4, getAwsCredentialProvider } from '../../deps';
import {
  MongoAWSError,
  MongoCompatibilityError,
  MongoMissingCredentialsError,
  MongoRuntimeError
} from '../../error';
import { Callback, maxWireVersion, ns } from '../../utils';
import { AuthContext, AuthProvider } from './auth_provider';
import { MongoCredentials } from './mongo_credentials';
import { AuthMechanism } from './providers';

const ASCII_N = 110;
const AWS_RELATIVE_URI = 'http://169.254.170.2';
const AWS_EC2_URI = 'http://169.254.169.254';
const AWS_EC2_PATH = '/latest/meta-data/iam/security-credentials';
const bsonOptions: BSONSerializeOptions = {
  promoteLongs: true,
  promoteValues: true,
  promoteBuffers: false,
  bsonRegExp: false
};

interface AWSSaslContinuePayload {
  a: string;
  d: string;
  t?: string;
}

export class MongoDBAWS extends AuthProvider {
  override auth(authContext: AuthContext, callback: Callback): void {
    const { connection, credentials } = authContext;
    if (!credentials) {
      return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }

if ('kModuleError' in aws4) {
      return callback(aws4['kModuleError']);
    }
    const { sign } = aws4;

if (maxWireVersion(connection) < 9) {
      callback(
        new MongoCompatibilityError(
          'MONGODB-AWS authentication requires MongoDB version 4.4 or later'
        )
      );
      return;
    }

if (!credentials.username) {
      makeTempCredentials(credentials, (err, tempCredentials) => {
        if (err || !tempCredentials) return callback(err);

authContext.credentials = tempCredentials;
        this.auth(authContext, callback);
      });

return;
    }

const accessKeyId = credentials.username;
    const secretAccessKey = credentials.password;
    const sessionToken = credentials.mechanismProperties.AWS_SESSION_TOKEN;

// If all three defined, include sessionToken, else include username and pass, else no credentials
    const awsCredentials =
      accessKeyId && secretAccessKey && sessionToken
        ? { accessKeyId, secretAccessKey, sessionToken }
        : accessKeyId && secretAccessKey
        ? { accessKeyId, secretAccessKey }
        : undefined;

const db = credentials.source;
    crypto.randomBytes(32, (err, nonce) => {
      if (err) {
        callback(err);
        return;
      }

const saslStart = {
        saslStart: 1,
        mechanism: 'MONGODB-AWS',
        payload: BSON.serialize({ r: nonce, p: ASCII_N }, bsonOptions)
      };

connection.command(ns(`${db}.$cmd`), saslStart, undefined, (err, res) => {
        if (err) return callback(err);

const serverResponse = BSON.deserialize(res.payload.buffer, bsonOptions) as {
          s: Binary;
          h: string;
        };
        const host = serverResponse.h;
        const serverNonce = serverResponse.s.buffer;
        if (serverNonce.length !== 64) {
          callback(
            // TODO(NODE-3483)
            new MongoRuntimeError(`Invalid server nonce length ${serverNonce.length}, expected 64`)
          );

return;
        }

if (serverNonce.compare(nonce, 0, nonce.length, 0, nonce.length) !== 0) {
          // TODO(NODE-3483)
          callback(new MongoRuntimeError('Server nonce does not begin with client nonce'));
          return;
        }

if (host.length < 1 || host.length > 255 || host.indexOf('..') !== -1) {
          // TODO(NODE-3483)
          callback(new MongoRuntimeError(`Server returned an invalid host: "${host}"`));
          return;
        }

const body = 'Action=GetCallerIdentity&Version=2011-06-15';
        const options = sign(
          {
            method: 'POST',
            host,
            region: deriveRegion(serverResponse.h),
            service: 'sts',
            headers: {
              'Content-Type': 'application/x-www-form-urlencoded',
              'Content-Length': body.length,
              'X-MongoDB-Server-Nonce': serverNonce.toString('base64'),
              'X-MongoDB-GS2-CB-Flag': 'n'
            },
            path: '/',
            body
          },
          awsCredentials
        );

const payload: AWSSaslContinuePayload = {
          a: options.headers.Authorization,
          d: options.headers['X-Amz-Date']
        };
        if (sessionToken) {
          payload.t = sessionToken;
        }

const saslContinue = {
          saslContinue: 1,
          conversationId: 1,
          payload: BSON.serialize(payload, bsonOptions)
        };

connection.command(ns(`${db}.$cmd`), saslContinue, undefined, callback);
      });
    });
  }
}

interface AWSTempCredentials {
  AccessKeyId?: string;
  SecretAccessKey?: string;
  Token?: string;
  RoleArn?: string;
  Expiration?: Date;
}

/* @internal */
export interface AWSCredentials {
  accessKeyId?: string;
  secretAccessKey?: string;
  sessionToken?: string;
  expiration?: Date;
}

function makeTempCredentials(credentials: MongoCredentials, callback: Callback<MongoCredentials>) {
  function done(creds: AWSTempCredentials) {
    if (!creds.AccessKeyId || !creds.SecretAccessKey || !creds.Token) {
      callback(
        new MongoMissingCredentialsError('Could not obtain temporary MONGODB-AWS credentials')
      );
      return;
    }

callback(
      undefined,
      new MongoCredentials({
        username: creds.AccessKeyId,
        password: creds.SecretAccessKey,
        source: credentials.source,
        mechanism: AuthMechanism.MONGODB_AWS,
        mechanismProperties: {
          AWS_SESSION_TOKEN: creds.Token
        }
      })
    );
  }

const credentialProvider = getAwsCredentialProvider();

// Check if the AWS credential provider from the SDK is present. If not,
  // use the old method.
  if ('kModuleError' in credentialProvider) {
    // If the environment variable AWS_CONTAINER_CREDENTIALS_RELATIVE_URI
    // is set then drivers MUST assume that it was set by an AWS ECS agent
    if (process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI) {
      request(
        `${AWS_RELATIVE_URI}${process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI}`,
        undefined,
        (err, res) => {
          if (err) return callback(err);
          done(res);
        }
      );

return;
    }

// Otherwise assume we are on an EC2 instance

// get a token
    request(
      `${AWS_EC2_URI}/latest/api/token`,
      { method: 'PUT', json: false, headers: { 'X-aws-ec2-metadata-token-ttl-seconds': 30 } },
      (err, token) => {
        if (err) return callback(err);

// get role name
        request(
          `${AWS_EC2_URI}/${AWS_EC2_PATH}`,
          { json: false, headers: { 'X-aws-ec2-metadata-token': token } },
          (err, roleName) => {
            if (err) return callback(err);

// get temp credentials
            request(
              `${AWS_EC2_URI}/${AWS_EC2_PATH}/${roleName}`,
              { headers: { 'X-aws-ec2-metadata-token': token } },
              (err, creds) => {
                if (err) return callback(err);
                done(creds);
              }
            );
          }
        );
      }
    );
  } else {
    /*
     * Creates a credential provider that will attempt to find credentials from the
     * following sources (listed in order of precedence):
     *
     * - Environment variables exposed via process.env
     * - SSO credentials from token cache
     * - Web identity token credentials
     * - Shared credentials and config ini files
     * - The EC2/ECS Instance Metadata Service
     */
    const { fromNodeProviderChain } = credentialProvider;
    const provider = fromNodeProviderChain();
    provider()
      .then((creds: AWSCredentials) => {
        done({
          AccessKeyId: creds.accessKeyId,
          SecretAccessKey: creds.secretAccessKey,
          Token: creds.sessionToken,
          Expiration: creds.expiration
        });
      })
      .catch((error: Error) => {
        callback(new MongoAWSError(error.message));
      });
  }
}

function deriveRegion(host: string) {
  const parts = host.split('.');
  if (parts.length === 1 || parts[1] === 'amazonaws') {
    return 'us-east-1';
  }

return parts[1];
}

interface RequestOptions {
  json?: boolean;
  method?: string;
  timeout?: number;
  headers?: http.OutgoingHttpHeaders;
}

function request(uri: string, _options: RequestOptions | undefined, callback: Callback) {
  const options = Object.assign(
    {
      method: 'GET',
      timeout: 10000,
      json: true
    },
    url.parse(uri),
    _options
  );

const req = http.request(options, res => {
    res.setEncoding('utf8');

let data = '';
    res.on('data', d => (data += d));
    res.on('end', () => {
      if (options.json === false) {
        callback(undefined, data);
        return;
      }

try {
        const parsed = JSON.parse(data);
        callback(undefined, parsed);
      } catch (err) {
        // TODO(NODE-3483)
        callback(new MongoRuntimeError(`Invalid JSON response: "${data}"`));
      }
    });
  });

req.on('timeout', () => {
    req.destroy(new MongoAWSError(`AWS request to ${uri} timed out after ${options.timeout} ms`));
  });

req.on('error', err => callback(err));
  req.end();
}
PK������O[���c��c��
��auth/plain.tsnu�ȯ����������import { Binary } from '../../bson';
import { MongoMissingCredentialsError } from '../../error';
import { Callback, ns } from '../../utils';
import { AuthContext, AuthProvider } from './auth_provider';

export class Plain extends AuthProvider {
  override auth(authContext: AuthContext, callback: Callback): void {
    const { connection, credentials } = authContext;
    if (!credentials) {
      return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    const username = credentials.username;
    const password = credentials.password;

const payload = new Binary(Buffer.from(`\x00${username}\x00${password}`));
    const command = {
      saslStart: 1,
      mechanism: 'PLAIN',
      payload: payload,
      autoAuthorize: 1
    };

connection.command(ns('$external.$cmd'), command, undefined, callback);
  }
}
PK������O[X���Q��Q����auth/x509.tsnu�ȯ����������import type { Document } from '../../bson';
import { MongoMissingCredentialsError } from '../../error';
import { Callback, ns } from '../../utils';
import type { HandshakeDocument } from '../connect';
import { AuthContext, AuthProvider } from './auth_provider';
import type { MongoCredentials } from './mongo_credentials';

export class X509 extends AuthProvider {
  override prepare(
    handshakeDoc: HandshakeDocument,
    authContext: AuthContext,
    callback: Callback
  ): void {
    const { credentials } = authContext;
    if (!credentials) {
      return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    Object.assign(handshakeDoc, {
      speculativeAuthenticate: x509AuthenticateCommand(credentials)
    });

callback(undefined, handshakeDoc);
  }

override auth(authContext: AuthContext, callback: Callback): void {
    const connection = authContext.connection;
    const credentials = authContext.credentials;
    if (!credentials) {
      return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    const response = authContext.response;

if (response && response.speculativeAuthenticate) {
      return callback();
    }

connection.command(
      ns('$external.$cmd'),
      x509AuthenticateCommand(credentials),
      undefined,
      callback
    );
  }
}

function x509AuthenticateCommand(credentials: MongoCredentials) {
  const command: Document = { authenticate: 1, mechanism: 'MONGODB-X509' };
  if (credentials.username) {
    command.user = credentials.username;
  }

return command;
}
PK������O[%U���������auth/mongocr.tsnu�ȯ����������import * as crypto from 'crypto';

import { MongoMissingCredentialsError } from '../../error';
import { Callback, ns } from '../../utils';
import { AuthContext, AuthProvider } from './auth_provider';

export class MongoCR extends AuthProvider {
  override auth(authContext: AuthContext, callback: Callback): void {
    const { connection, credentials } = authContext;
    if (!credentials) {
      return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    const username = credentials.username;
    const password = credentials.password;
    const source = credentials.source;
    connection.command(ns(`${source}.$cmd`), { getnonce: 1 }, undefined, (err, r) => {
      let nonce = null;
      let key = null;

// Get nonce
      if (err == null) {
        nonce = r.nonce;

// Use node md5 generator
        let md5 = crypto.createHash('md5');

// Generate keys used for authentication
        md5.update(`${username}:mongo:${password}`, 'utf8');
        const hash_password = md5.digest('hex');

// Final key
        md5 = crypto.createHash('md5');
        md5.update(nonce + username + hash_password, 'utf8');
        key = md5.digest('hex');
      }

const authenticateCommand = {
        authenticate: 1,
        user: username,
        nonce,
        key
      };

connection.command(ns(`${source}.$cmd`), authenticateCommand, undefined, callback);
    });
  }
}
PK������O[;]Iue)��e)��
��auth/scram.tsnu�ȯ����������import * as crypto from 'crypto';

import { Binary, Document } from '../../bson';
import { saslprep } from '../../deps';
import {
  AnyError,
  MongoInvalidArgumentError,
  MongoMissingCredentialsError,
  MongoRuntimeError,
  MongoServerError
} from '../../error';
import { Callback, emitWarning, ns } from '../../utils';
import type { HandshakeDocument } from '../connect';
import { AuthContext, AuthProvider } from './auth_provider';
import type { MongoCredentials } from './mongo_credentials';
import { AuthMechanism } from './providers';

type CryptoMethod = 'sha1' | 'sha256';

class ScramSHA extends AuthProvider {
  cryptoMethod: CryptoMethod;
  constructor(cryptoMethod: CryptoMethod) {
    super();
    this.cryptoMethod = cryptoMethod || 'sha1';
  }

override prepare(handshakeDoc: HandshakeDocument, authContext: AuthContext, callback: Callback) {
    const cryptoMethod = this.cryptoMethod;
    const credentials = authContext.credentials;
    if (!credentials) {
      return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
    }
    if (cryptoMethod === 'sha256' && saslprep == null) {
      emitWarning('Warning: no saslprep library specified. Passwords will not be sanitized');
    }

crypto.randomBytes(24, (err, nonce) => {
      if (err) {
        return callback(err);
      }

// store the nonce for later use
      Object.assign(authContext, { nonce });

const request = Object.assign({}, handshakeDoc, {
        speculativeAuthenticate: Object.assign(makeFirstMessage(cryptoMethod, credentials, nonce), {
          db: credentials.source
        })
      });

callback(undefined, request);
    });
  }

override auth(authContext: AuthContext, callback: Callback) {
    const response = authContext.response;
    if (response && response.speculativeAuthenticate) {
      continueScramConversation(
        this.cryptoMethod,
        response.speculativeAuthenticate,
        authContext,
        callback
      );

return;
    }

executeScram(this.cryptoMethod, authContext, callback);
  }
}

function cleanUsername(username: string) {
  return username.replace('=', '=3D').replace(',', '=2C');
}

function clientFirstMessageBare(username: string, nonce: Buffer) {
  // NOTE: This is done b/c Javascript uses UTF-16, but the server is hashing in UTF-8.
  // Since the username is not sasl-prep-d, we need to do this here.
  return Buffer.concat([
    Buffer.from('n=', 'utf8'),
    Buffer.from(username, 'utf8'),
    Buffer.from(',r=', 'utf8'),
    Buffer.from(nonce.toString('base64'), 'utf8')
  ]);
}

function makeFirstMessage(
  cryptoMethod: CryptoMethod,
  credentials: MongoCredentials,
  nonce: Buffer
) {
  const username = cleanUsername(credentials.username);
  const mechanism =
    cryptoMethod === 'sha1' ? AuthMechanism.MONGODB_SCRAM_SHA1 : AuthMechanism.MONGODB_SCRAM_SHA256;

// NOTE: This is done b/c Javascript uses UTF-16, but the server is hashing in UTF-8.
  // Since the username is not sasl-prep-d, we need to do this here.
  return {
    saslStart: 1,
    mechanism,
    payload: new Binary(
      Buffer.concat([Buffer.from('n,,', 'utf8'), clientFirstMessageBare(username, nonce)])
    ),
    autoAuthorize: 1,
    options: { skipEmptyExchange: true }
  };
}

const saslStartCmd = makeFirstMessage(cryptoMethod, credentials, nonce);
  connection.command(ns(`${db}.$cmd`), saslStartCmd, undefined, (_err, result) => {
    const err = resolveError(_err, result);
    if (err) {
      return callback(err);
    }

continueScramConversation(cryptoMethod, result, authContext, callback);
  });
}

function continueScramConversation(
  cryptoMethod: CryptoMethod,
  response: Document,
  authContext: AuthContext,
  callback: Callback
) {
  const connection = authContext.connection;
  const credentials = authContext.credentials;
  if (!credentials) {
    return callback(new MongoMissingCredentialsError('AuthContext must provide credentials.'));
  }
  if (!authContext.nonce) {
    return callback(new MongoInvalidArgumentError('Unable to continue SCRAM without valid nonce'));
  }
  const nonce = authContext.nonce;

const db = credentials.source;
  const username = cleanUsername(credentials.username);
  const password = credentials.password;

let processedPassword;
  if (cryptoMethod === 'sha256') {
    processedPassword = 'kModuleError' in saslprep ? password : saslprep(password);
  } else {
    try {
      processedPassword = passwordDigest(username, password);
    } catch (e) {
      return callback(e);
    }
  }

const payload = Buffer.isBuffer(response.payload)
    ? new Binary(response.payload)
    : response.payload;
  const dict = parsePayload(payload.value());

const iterations = parseInt(dict.i, 10);
  if (iterations && iterations < 4096) {
    callback(
      // TODO(NODE-3483)
      new MongoRuntimeError(`Server returned an invalid iteration count ${iterations}`),
      false
    );
    return;
  }

const salt = dict.s;
  const rnonce = dict.r;
  if (rnonce.startsWith('nonce')) {
    // TODO(NODE-3483)
    callback(new MongoRuntimeError(`Server returned an invalid nonce: ${rnonce}`), false);
    return;
  }

// Set up start of proof
  const withoutProof = `c=biws,r=${rnonce}`;
  const saltedPassword = HI(
    processedPassword,
    Buffer.from(salt, 'base64'),
    iterations,
    cryptoMethod
  );

const clientKey = HMAC(cryptoMethod, saltedPassword, 'Client Key');
  const serverKey = HMAC(cryptoMethod, saltedPassword, 'Server Key');
  const storedKey = H(cryptoMethod, clientKey);
  const authMessage = [clientFirstMessageBare(username, nonce), payload.value(), withoutProof].join(
    ','
  );

const clientSignature = HMAC(cryptoMethod, storedKey, authMessage);
  const clientProof = `p=${xor(clientKey, clientSignature)}`;
  const clientFinal = [withoutProof, clientProof].join(',');

const serverSignature = HMAC(cryptoMethod, serverKey, authMessage);
  const saslContinueCmd = {
    saslContinue: 1,
    conversationId: response.conversationId,
    payload: new Binary(Buffer.from(clientFinal))
  };

connection.command(ns(`${db}.$cmd`), saslContinueCmd, undefined, (_err, r) => {
    const err = resolveError(_err, r);
    if (err) {
      return callback(err);
    }

const parsedResponse = parsePayload(r.payload.value());
    if (!compareDigest(Buffer.from(parsedResponse.v, 'base64'), serverSignature)) {
      callback(new MongoRuntimeError('Server returned an invalid signature'));
      return;
    }

if (!r || r.done !== false) {
      return callback(err, r);
    }

const retrySaslContinueCmd = {
      saslContinue: 1,
      conversationId: r.conversationId,
      payload: Buffer.alloc(0)
    };

connection.command(ns(`${db}.$cmd`), retrySaslContinueCmd, undefined, callback);
  });
}

function parsePayload(payload: string) {
  const dict: Document = {};
  const parts = payload.split(',');
  for (let i = 0; i < parts.length; i++) {
    const valueParts = parts[i].split('=');
    dict[valueParts[0]] = valueParts[1];
  }

return dict;
}

function passwordDigest(username: string, password: string) {
  if (typeof username !== 'string') {
    throw new MongoInvalidArgumentError('Username must be a string');
  }

if (typeof password !== 'string') {
    throw new MongoInvalidArgumentError('Password must be a string');
  }

if (password.length === 0) {
    throw new MongoInvalidArgumentError('Password cannot be empty');
  }

let md5: crypto.Hash;
  try {
    md5 = crypto.createHash('md5');
  } catch (err) {
    if (crypto.getFips()) {
      // This error is (slightly) more helpful than what comes from OpenSSL directly, e.g.
      // 'Error: error:060800C8:digital envelope routines:EVP_DigestInit_ex:disabled for FIPS'
      throw new Error('Auth mechanism SCRAM-SHA-1 is not supported in FIPS mode');
    }
    throw err;
  }
  md5.update(`${username}:mongo:${password}`, 'utf8');
  return md5.digest('hex');
}

// XOR two buffers
function xor(a: Buffer, b: Buffer) {
  if (!Buffer.isBuffer(a)) {
    a = Buffer.from(a);
  }

if (!Buffer.isBuffer(b)) {
    b = Buffer.from(b);
  }

const length = Math.max(a.length, b.length);
  const res = [];

for (let i = 0; i < length; i += 1) {
    res.push(a[i] ^ b[i]);
  }

return Buffer.from(res).toString('base64');
}

function H(method: CryptoMethod, text: Buffer) {
  return crypto.createHash(method).update(text).digest();
}

function HMAC(method: CryptoMethod, key: Buffer, text: Buffer | string) {
  return crypto.createHmac(method, key).update(text).digest();
}

interface HICache {
  [key: string]: Buffer;
}

let _hiCache: HICache = {};
let _hiCacheCount = 0;
function _hiCachePurge() {
  _hiCache = {};
  _hiCacheCount = 0;
}

const hiLengthMap = {
  sha256: 32,
  sha1: 20
};

function HI(data: string, salt: Buffer, iterations: number, cryptoMethod: CryptoMethod) {
  // omit the work if already generated
  const key = [data, salt.toString('base64'), iterations].join('_');
  if (_hiCache[key] != null) {
    return _hiCache[key];
  }

// generate the salt
  const saltedData = crypto.pbkdf2Sync(
    data,
    salt,
    iterations,
    hiLengthMap[cryptoMethod],
    cryptoMethod
  );

// cache a copy to speed up the next lookup, but prevent unbounded cache growth
  if (_hiCacheCount >= 200) {
    _hiCachePurge();
  }

_hiCache[key] = saltedData;
  _hiCacheCount += 1;
  return saltedData;
}

function compareDigest(lhs: Buffer, rhs: Uint8Array) {
  if (lhs.length !== rhs.length) {
    return false;
  }

if (typeof crypto.timingSafeEqual === 'function') {
    return crypto.timingSafeEqual(lhs, rhs);
  }

let result = 0;
  for (let i = 0; i < lhs.length; i++) {
    result |= lhs[i] ^ rhs[i];
  }

return result === 0;
}

function resolveError(err?: AnyError, result?: Document) {
  if (err) return err;
  if (result) {
    if (result.$err || result.errmsg) return new MongoServerError(result);
  }
  return;
}

export class ScramSHA1 extends ScramSHA {
  constructor() {
    super('sha1');
  }
}

export class ScramSHA256 extends ScramSHA {
  constructor() {
    super('sha256');
  }
}
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��metrics.tsnu�ȯ����������/** @internal */
export class ConnectionPoolMetrics {
  static readonly TXN = 'txn' as const;
  static readonly CURSOR = 'cursor' as const;
  static readonly OTHER = 'other' as const;

txnConnections = 0;
  cursorConnections = 0;
  otherConnections = 0;

/**
   * Mark a connection as pinned for a specific operation.
   */
  markPinned(pinType: string): void {
    if (pinType === ConnectionPoolMetrics.TXN) {
      this.txnConnections += 1;
    } else if (pinType === ConnectionPoolMetrics.CURSOR) {
      this.cursorConnections += 1;
    } else {
      this.otherConnections += 1;
    }
  }

/**
   * Unmark a connection as pinned for an operation.
   */
  markUnpinned(pinType: string): void {
    if (pinType === ConnectionPoolMetrics.TXN) {
      this.txnConnections -= 1;
    } else if (pinType === ConnectionPoolMetrics.CURSOR) {
      this.cursorConnections -= 1;
    } else {
      this.otherConnections -= 1;
    }
  }

/**
   * Return information about the cmap metrics as a string.
   */
  info(maxPoolSize: number): string {
    return (
      'Timed out while checking out a connection from connection pool: ' +
      `maxPoolSize: ${maxPoolSize}, ` +
      `connections in use by cursors: ${this.cursorConnections}, ` +
      `connections in use by transactions: ${this.txnConnections}, ` +
      `connections in use by other operations: ${this.otherConnections}`
    );
  }

/**
   * Reset the metrics to the initial values.
   */
  reset(): void {
    this.txnConnections = 0;
    this.cursorConnections = 0;
    this.otherConnections = 0;
  }
}
PK������O[ɑ�������	��errors.tsnu�ȯ����������import { MongoDriverError, MongoNetworkError } from '../error';
import type { ConnectionPool } from './connection_pool';

/**
 * An error indicating a connection pool is closed
 * @category Error
 */
export class PoolClosedError extends MongoDriverError {
  /** The address of the connection pool */
  address: string;

constructor(pool: ConnectionPool) {
    super('Attempted to check out a connection from closed connection pool');
    this.address = pool.address;
  }

override get name(): string {
    return 'MongoPoolClosedError';
  }
}

/**
 * An error indicating a connection pool is currently paused
 * @category Error
 */
export class PoolClearedError extends MongoNetworkError {
  /** The address of the connection pool */
  address: string;

constructor(pool: ConnectionPool) {
    super(
      `Connection pool for ${pool.address} was cleared because another operation failed with: "${pool.serverError?.message}"`
    );
    this.address = pool.address;
  }

override get name(): string {
    return 'MongoPoolClearedError';
  }
}

/**
 * An error thrown when a request to check out a connection times out
 * @category Error
 */
export class WaitQueueTimeoutError extends MongoDriverError {
  /** The address of the connection pool */
  address: string;

constructor(message: string, address: string) {
    super(message);
    this.address = address;
  }

override get name(): string {
    return 'MongoWaitQueueTimeoutError';
  }
}
PK������O[}��������message_stream.tsnu�ȯ����������import { Duplex, DuplexOptions } from 'stream';

import type { BSONSerializeOptions, Document } from '../bson';
import { MongoDecompressionError, MongoParseError } from '../error';
import type { ClientSession } from '../sessions';
import { BufferPool, Callback } from '../utils';
import { BinMsg, MessageHeader, Msg, Response, WriteProtocolMessageType } from './commands';
import {
  compress,
  Compressor,
  CompressorName,
  decompress,
  uncompressibleCommands
} from './wire_protocol/compression';
import { OP_COMPRESSED, OP_MSG } from './wire_protocol/constants';

const MESSAGE_HEADER_SIZE = 16;
const COMPRESSION_DETAILS_SIZE = 9; // originalOpcode + uncompressedSize, compressorID

const kDefaultMaxBsonMessageSize = 1024 * 1024 * 16 * 4;
/** @internal */
const kBuffer = Symbol('buffer');

/** @internal */
export interface MessageStreamOptions extends DuplexOptions {
  maxBsonMessageSize?: number;
}

/** @internal */
export interface OperationDescription extends BSONSerializeOptions {
  started: number;
  cb: Callback<Document>;
  command: boolean;
  documentsReturnedIn?: string;
  noResponse: boolean;
  raw: boolean;
  requestId: number;
  session?: ClientSession;
  socketTimeoutOverride?: boolean;
  agreedCompressor?: CompressorName;
  zlibCompressionLevel?: number;
  $clusterTime?: Document;
}

/**
 * A duplex stream that is capable of reading and writing raw wire protocol messages, with
 * support for optional compression
 * @internal
 */
export class MessageStream extends Duplex {
  /** @internal */
  maxBsonMessageSize: number;
  /** @internal */
  [kBuffer]: BufferPool;
  /** @internal */
  isMonitoringConnection = false;

constructor(options: MessageStreamOptions = {}) {
    super(options);
    this.maxBsonMessageSize = options.maxBsonMessageSize || kDefaultMaxBsonMessageSize;
    this[kBuffer] = new BufferPool();
  }

get buffer(): BufferPool {
    return this[kBuffer];
  }

override _write(chunk: Buffer, _: unknown, callback: Callback<Buffer>): void {
    this[kBuffer].append(chunk);
    processIncomingData(this, callback);
  }

override _read(/* size */): void {
    // NOTE: This implementation is empty because we explicitly push data to be read
    //       when `writeMessage` is called.
    return;
  }

writeCommand(
    command: WriteProtocolMessageType,
    operationDescription: OperationDescription
  ): void {
    // TODO: agreed compressor should live in `StreamDescription`
    const compressorName: CompressorName =
      operationDescription && operationDescription.agreedCompressor
        ? operationDescription.agreedCompressor
        : 'none';
    if (compressorName === 'none' || !canCompress(command)) {
      const data = command.toBin();
      this.push(Array.isArray(data) ? Buffer.concat(data) : data);
      return;
    }
    // otherwise, compress the message
    const concatenatedOriginalCommandBuffer = Buffer.concat(command.toBin());
    const messageToBeCompressed = concatenatedOriginalCommandBuffer.slice(MESSAGE_HEADER_SIZE);

// Extract information needed for OP_COMPRESSED from the uncompressed message
    const originalCommandOpCode = concatenatedOriginalCommandBuffer.readInt32LE(12);

// Compress the message body
    compress({ options: operationDescription }, messageToBeCompressed, (err, compressedMessage) => {
      if (err || !compressedMessage) {
        operationDescription.cb(err);
        return;
      }

// Create the msgHeader of OP_COMPRESSED
      const msgHeader = Buffer.alloc(MESSAGE_HEADER_SIZE);
      msgHeader.writeInt32LE(
        MESSAGE_HEADER_SIZE + COMPRESSION_DETAILS_SIZE + compressedMessage.length,
        0
      ); // messageLength
      msgHeader.writeInt32LE(command.requestId, 4); // requestID
      msgHeader.writeInt32LE(0, 8); // responseTo (zero)
      msgHeader.writeInt32LE(OP_COMPRESSED, 12); // opCode

// Create the compression details of OP_COMPRESSED
      const compressionDetails = Buffer.alloc(COMPRESSION_DETAILS_SIZE);
      compressionDetails.writeInt32LE(originalCommandOpCode, 0); // originalOpcode
      compressionDetails.writeInt32LE(messageToBeCompressed.length, 4); // Size of the uncompressed compressedMessage, excluding the MsgHeader
      compressionDetails.writeUInt8(Compressor[compressorName], 8); // compressorID
      this.push(Buffer.concat([msgHeader, compressionDetails, compressedMessage]));
    });
  }
}

// Return whether a command contains an uncompressible command term
// Will return true if command contains no uncompressible command terms
function canCompress(command: WriteProtocolMessageType) {
  const commandDoc = command instanceof Msg ? command.command : command.query;
  const commandName = Object.keys(commandDoc)[0];
  return !uncompressibleCommands.has(commandName);
}

function processIncomingData(stream: MessageStream, callback: Callback<Buffer>): void {
  const buffer = stream[kBuffer];
  const sizeOfMessage = buffer.getInt32();

if (sizeOfMessage == null) {
    return callback();
  }

if (sizeOfMessage < 0) {
    return callback(new MongoParseError(`Invalid message size: ${sizeOfMessage}`));
  }

if (sizeOfMessage > stream.maxBsonMessageSize) {
    return callback(
      new MongoParseError(
        `Invalid message size: ${sizeOfMessage}, max allowed: ${stream.maxBsonMessageSize}`
      )
    );
  }

if (sizeOfMessage > buffer.length) {
    return callback();
  }

const message = buffer.read(sizeOfMessage);
  const messageHeader: MessageHeader = {
    length: message.readInt32LE(0),
    requestId: message.readInt32LE(4),
    responseTo: message.readInt32LE(8),
    opCode: message.readInt32LE(12)
  };

let ResponseType = messageHeader.opCode === OP_MSG ? BinMsg : Response;
  if (messageHeader.opCode !== OP_COMPRESSED) {
    const messageBody = message.subarray(MESSAGE_HEADER_SIZE);

// If we are a monitoring connection message stream and
    // there is more in the buffer that can be read, skip processing since we
    // want the last hello command response that is in the buffer.
    if (monitorHasAnotherHello()) {
      return processIncomingData(stream, callback);
    }

stream.emit('message', new ResponseType(message, messageHeader, messageBody));

if (buffer.length >= 4) {
      return processIncomingData(stream, callback);
    }
    return callback();
  }

messageHeader.fromCompressed = true;
  messageHeader.opCode = message.readInt32LE(MESSAGE_HEADER_SIZE);
  messageHeader.length = message.readInt32LE(MESSAGE_HEADER_SIZE + 4);
  const compressorID: Compressor = message[MESSAGE_HEADER_SIZE + 8] as Compressor;
  const compressedBuffer = message.slice(MESSAGE_HEADER_SIZE + 9);

// recalculate based on wrapped opcode
  ResponseType = messageHeader.opCode === OP_MSG ? BinMsg : Response;
  return decompress(compressorID, compressedBuffer, (err, messageBody) => {
    if (err || !messageBody) {
      return callback(err);
    }

if (messageBody.length !== messageHeader.length) {
      return callback(
        new MongoDecompressionError('Message body and message header must be the same length')
      );
    }

if (buffer.length >= 4) {
      return processIncomingData(stream, callback);
    }
    return callback();
  });
}
PK������O[k݌�m��m����stream_description.tsnu�ȯ����������import type { Document } from '../bson';
import { ServerType } from '../sdam/common';
import { parseServerType } from '../sdam/server_description';
import type { CompressorName } from './wire_protocol/compression';

const RESPONSE_FIELDS = [
  'minWireVersion',
  'maxWireVersion',
  'maxBsonObjectSize',
  'maxMessageSizeBytes',
  'maxWriteBatchSize',
  'logicalSessionTimeoutMinutes'
] as const;

/** @public */
export interface StreamDescriptionOptions {
  compressors?: CompressorName[];
  logicalSessionTimeoutMinutes?: number;
  loadBalanced: boolean;
}

/** @public */
export class StreamDescription {
  address: string;
  type: string;
  minWireVersion?: number;
  maxWireVersion?: number;
  maxBsonObjectSize: number;
  maxMessageSizeBytes: number;
  maxWriteBatchSize: number;
  compressors: CompressorName[];
  compressor?: CompressorName;
  logicalSessionTimeoutMinutes?: number;
  loadBalanced: boolean;

__nodejs_mock_server__?: boolean;

zlibCompressionLevel?: number;

constructor(address: string, options?: StreamDescriptionOptions) {
    this.address = address;
    this.type = ServerType.Unknown;
    this.minWireVersion = undefined;
    this.maxWireVersion = undefined;
    this.maxBsonObjectSize = 16777216;
    this.maxMessageSizeBytes = 48000000;
    this.maxWriteBatchSize = 100000;
    this.logicalSessionTimeoutMinutes = options?.logicalSessionTimeoutMinutes;
    this.loadBalanced = !!options?.loadBalanced;
    this.compressors =
      options && options.compressors && Array.isArray(options.compressors)
        ? options.compressors
        : [];
  }

receiveResponse(response: Document | null): void {
    if (response == null) {
      return;
    }
    this.type = parseServerType(response);
    for (const field of RESPONSE_FIELDS) {
      if (response[field] != null) {
        this[field] = response[field];
      }

// testing case
      if ('__nodejs_mock_server__' in response) {
        this.__nodejs_mock_server__ = response['__nodejs_mock_server__'];
      }
    }

if (response.compression) {
      this.compressor = this.compressors.filter(c => response.compression?.includes(c))[0];
    }
  }
}
PK������O[1��z ��z ����command_monitoring_events.tsnu�ȯ����������import type { Document, ObjectId } from '../bson';
import { LEGACY_HELLO_COMMAND, LEGACY_HELLO_COMMAND_CAMEL_CASE } from '../constants';
import { calculateDurationInMs, deepCopy } from '../utils';
import { Msg, WriteProtocolMessageType } from './commands';
import type { Connection } from './connection';

/**
 * An event indicating the start of a given
 * @public
 * @category Event
 */
export class CommandStartedEvent {
  commandObj?: Document;
  requestId: number;
  databaseName: string;
  commandName: string;
  command: Document;
  address: string;
  connectionId?: string | number;
  serviceId?: ObjectId;

/**
   * Create a started event
   *
   * @internal
   * @param pool - the pool that originated the command
   * @param command - the command
   */
  constructor(connection: Connection, command: WriteProtocolMessageType) {
    const cmd = extractCommand(command);
    const commandName = extractCommandName(cmd);
    const { address, connectionId, serviceId } = extractConnectionDetails(connection);

// TODO: remove in major revision, this is not spec behavior
    if (SENSITIVE_COMMANDS.has(commandName)) {
      this.commandObj = {};
      this.commandObj[commandName] = true;
    }

this.address = address;
    this.connectionId = connectionId;
    this.serviceId = serviceId;
    this.requestId = command.requestId;
    this.databaseName = databaseName(command);
    this.commandName = commandName;
    this.command = maybeRedact(commandName, cmd, cmd);
  }

/* @internal */
  get hasServiceId(): boolean {
    return !!this.serviceId;
  }
}

/**
 * An event indicating the success of a given command
 * @public
 * @category Event
 */
export class CommandSucceededEvent {
  address: string;
  connectionId?: string | number;
  requestId: number;
  duration: number;
  commandName: string;
  reply: unknown;
  serviceId?: ObjectId;

/**
   * Create a succeeded event
   *
   * @internal
   * @param pool - the pool that originated the command
   * @param command - the command
   * @param reply - the reply for this command from the server
   * @param started - a high resolution tuple timestamp of when the command was first sent, to calculate duration
   */
  constructor(
    connection: Connection,
    command: WriteProtocolMessageType,
    reply: Document | undefined,
    started: number
  ) {
    const cmd = extractCommand(command);
    const commandName = extractCommandName(cmd);
    const { address, connectionId, serviceId } = extractConnectionDetails(connection);

this.address = address;
    this.connectionId = connectionId;
    this.serviceId = serviceId;
    this.requestId = command.requestId;
    this.commandName = commandName;
    this.duration = calculateDurationInMs(started);
    this.reply = maybeRedact(commandName, cmd, extractReply(command, reply));
  }

/* @internal */
  get hasServiceId(): boolean {
    return !!this.serviceId;
  }
}

/**
 * An event indicating the failure of a given command
 * @public
 * @category Event
 */
export class CommandFailedEvent {
  address: string;
  connectionId?: string | number;
  requestId: number;
  duration: number;
  commandName: string;
  failure: Error;
  serviceId?: ObjectId;

/**
   * Create a failure event
   *
   * @internal
   * @param pool - the pool that originated the command
   * @param command - the command
   * @param error - the generated error or a server error response
   * @param started - a high resolution tuple timestamp of when the command was first sent, to calculate duration
   */
  constructor(
    connection: Connection,
    command: WriteProtocolMessageType,
    error: Error | Document,
    started: number
  ) {
    const cmd = extractCommand(command);
    const commandName = extractCommandName(cmd);
    const { address, connectionId, serviceId } = extractConnectionDetails(connection);

this.address = address;
    this.connectionId = connectionId;
    this.serviceId = serviceId;

this.requestId = command.requestId;
    this.commandName = commandName;
    this.duration = calculateDurationInMs(started);
    this.failure = maybeRedact(commandName, cmd, error) as Error;
  }

/* @internal */
  get hasServiceId(): boolean {
    return !!this.serviceId;
  }
}

/** Commands that we want to redact because of the sensitive nature of their contents */
const SENSITIVE_COMMANDS = new Set([
  'authenticate',
  'saslStart',
  'saslContinue',
  'getnonce',
  'createUser',
  'updateUser',
  'copydbgetnonce',
  'copydbsaslstart',
  'copydb'
]);

const HELLO_COMMANDS = new Set(['hello', LEGACY_HELLO_COMMAND, LEGACY_HELLO_COMMAND_CAMEL_CASE]);

// helper methods
const extractCommandName = (commandDoc: Document) => Object.keys(commandDoc)[0];
const namespace = (command: WriteProtocolMessageType) => command.ns;
const databaseName = (command: WriteProtocolMessageType) => command.ns.split('.')[0];
const collectionName = (command: WriteProtocolMessageType) => command.ns.split('.')[1];
const maybeRedact = (commandName: string, commandDoc: Document, result: Error | Document) =>
  SENSITIVE_COMMANDS.has(commandName) ||
  (HELLO_COMMANDS.has(commandName) && commandDoc.speculativeAuthenticate)
    ? {}
    : result;

const LEGACY_FIND_QUERY_MAP: { [key: string]: string } = {
  $query: 'filter',
  $orderby: 'sort',
  $hint: 'hint',
  $comment: 'comment',
  $maxScan: 'maxScan',
  $max: 'max',
  $min: 'min',
  $returnKey: 'returnKey',
  $showDiskLoc: 'showRecordId',
  $maxTimeMS: 'maxTimeMS',
  $snapshot: 'snapshot'
};

const LEGACY_FIND_OPTIONS_MAP = {
  numberToSkip: 'skip',
  numberToReturn: 'batchSize',
  returnFieldSelector: 'projection'
} as const;

const OP_QUERY_KEYS = [
  'tailable',
  'oplogReplay',
  'noCursorTimeout',
  'awaitData',
  'partial',
  'exhaust'
] as const;

/** Extract the actual command from the query, possibly up-converting if it's a legacy format */
function extractCommand(command: WriteProtocolMessageType): Document {
  if (command instanceof Msg) {
    return deepCopy(command.command);
  }

if (command.query?.$query) {
    let result: Document;
    if (command.ns === 'admin.$cmd') {
      // up-convert legacy command
      result = Object.assign({}, command.query.$query);
    } else {
      // up-convert legacy find command
      result = { find: collectionName(command) };
      Object.keys(LEGACY_FIND_QUERY_MAP).forEach(key => {
        if (command.query[key] != null) {
          result[LEGACY_FIND_QUERY_MAP[key]] = deepCopy(command.query[key]);
        }
      });
    }

Object.keys(LEGACY_FIND_OPTIONS_MAP).forEach(key => {
      const legacyKey = key as keyof typeof LEGACY_FIND_OPTIONS_MAP;
      if (command[legacyKey] != null) {
        result[LEGACY_FIND_OPTIONS_MAP[legacyKey]] = deepCopy(command[legacyKey]);
      }
    });

OP_QUERY_KEYS.forEach(key => {
      if (command[key]) {
        result[key] = command[key];
      }
    });

if (command.pre32Limit != null) {
      result.limit = command.pre32Limit;
    }

if (command.query.$explain) {
      return { explain: result };
    }
    return result;
  }

const clonedQuery: Record<string, unknown> = {};
  const clonedCommand: Record<string, unknown> = {};
  if (command.query) {
    for (const k in command.query) {
      clonedQuery[k] = deepCopy(command.query[k]);
    }
    clonedCommand.query = clonedQuery;
  }

for (const k in command) {
    if (k === 'query') continue;
    clonedCommand[k] = deepCopy((command as unknown as Record<string, unknown>)[k]);
  }
  return command.query ? clonedQuery : clonedCommand;
}

function extractReply(command: WriteProtocolMessageType, reply?: Document) {
  if (!reply) {
    return reply;
  }

if (command instanceof Msg) {
    return deepCopy(reply.result ? reply.result : reply);
  }

// is this a legacy find command?
  if (command.query && command.query.$query != null) {
    return {
      ok: 1,
      cursor: {
        id: deepCopy(reply.cursorId),
        ns: namespace(command),
        firstBatch: deepCopy(reply.documents)
      }
    };
  }

return deepCopy(reply.result ? reply.result : reply);
}

import type { Document } from '../bson';
import { Int32 } from '../bson';
import { LEGACY_HELLO_COMMAND } from '../constants';
import {
  MongoCompatibilityError,
  MongoError,
  MongoErrorLabel,
  MongoInvalidArgumentError,
  MongoNetworkError,
  MongoNetworkTimeoutError,
  MongoRuntimeError,
  MongoServerError,
  needsRetryableWriteLabel
} from '../error';
import { Callback, ClientMetadata, HostAddress, makeClientMetadata, ns } from '../utils';
import { AuthContext, AuthProvider } from './auth/auth_provider';
import { GSSAPI } from './auth/gssapi';
import { MongoCR } from './auth/mongocr';
import { MongoDBAWS } from './auth/mongodb_aws';
import { Plain } from './auth/plain';
import { AuthMechanism } from './auth/providers';
import { ScramSHA1, ScramSHA256 } from './auth/scram';
import { X509 } from './auth/x509';
import { Connection, ConnectionOptions, CryptoConnection } from './connection';
import {
  MAX_SUPPORTED_SERVER_VERSION,
  MAX_SUPPORTED_WIRE_VERSION,
  MIN_SUPPORTED_SERVER_VERSION,
  MIN_SUPPORTED_WIRE_VERSION
} from './wire_protocol/constants';

const AUTH_PROVIDERS = new Map<AuthMechanism | string, AuthProvider>([
  [AuthMechanism.MONGODB_AWS, new MongoDBAWS()],
  [AuthMechanism.MONGODB_CR, new MongoCR()],
  [AuthMechanism.MONGODB_GSSAPI, new GSSAPI()],
  [AuthMechanism.MONGODB_PLAIN, new Plain()],
  [AuthMechanism.MONGODB_SCRAM_SHA1, new ScramSHA1()],
  [AuthMechanism.MONGODB_SCRAM_SHA256, new ScramSHA256()],
  [AuthMechanism.MONGODB_X509, new X509()]
]);

/** @public */
export type Stream = Socket | TLSSocket;

export function connect(options: ConnectionOptions, callback: Callback<Connection>): void {
  makeConnection({ ...options, existingSocket: undefined }, (err, socket) => {
    if (err || !socket) {
      return callback(err);
    }

let ConnectionType = options.connectionType ?? Connection;
    if (options.autoEncrypter) {
      ConnectionType = CryptoConnection;
    }
    performInitialHandshake(new ConnectionType(socket, options), options, callback);
  });
}

function checkSupportedServer(hello: Document, options: ConnectionOptions) {
  const serverVersionHighEnough =
    hello &&
    (typeof hello.maxWireVersion === 'number' || hello.maxWireVersion instanceof Int32) &&
    hello.maxWireVersion >= MIN_SUPPORTED_WIRE_VERSION;
  const serverVersionLowEnough =
    hello &&
    (typeof hello.minWireVersion === 'number' || hello.minWireVersion instanceof Int32) &&
    hello.minWireVersion <= MAX_SUPPORTED_WIRE_VERSION;

if (serverVersionHighEnough) {
    if (serverVersionLowEnough) {
      return null;
    }

const message = `Server at ${options.hostAddress} reports minimum wire version ${JSON.stringify(
      hello.minWireVersion
    )}, but this version of the Node.js Driver requires at most ${MAX_SUPPORTED_WIRE_VERSION} (MongoDB ${MAX_SUPPORTED_SERVER_VERSION})`;
    return new MongoCompatibilityError(message);
  }

const message = `Server at ${options.hostAddress} reports maximum wire version ${
    JSON.stringify(hello.maxWireVersion) ?? 0
  }, but this version of the Node.js Driver requires at least ${MIN_SUPPORTED_WIRE_VERSION} (MongoDB ${MIN_SUPPORTED_SERVER_VERSION})`;
  return new MongoCompatibilityError(message);
}

function performInitialHandshake(
  conn: Connection,
  options: ConnectionOptions,
  _callback: Callback
) {
  const callback: Callback<Document> = function (err, ret) {
    if (err && conn) {
      conn.destroy();
    }
    _callback(err, ret);
  };

const authContext = new AuthContext(conn, credentials, options);
  prepareHandshakeDocument(authContext, (err, handshakeDoc) => {
    if (err || !handshakeDoc) {
      return callback(err);
    }

const handshakeOptions: Document = Object.assign({}, options);
    if (typeof options.connectTimeoutMS === 'number') {
      // The handshake technically is a monitoring check, so its socket timeout should be connectTimeoutMS
      handshakeOptions.socketTimeoutMS = options.connectTimeoutMS;
    }

const start = new Date().getTime();
    conn.command(ns('admin.$cmd'), handshakeDoc, handshakeOptions, (err, response) => {
      if (err) {
        callback(err);
        return;
      }

if (response?.ok === 0) {
        callback(new MongoServerError(response));
        return;
      }

if (!('isWritablePrimary' in response)) {
        // Provide hello-style response document.
        response.isWritablePrimary = response[LEGACY_HELLO_COMMAND];
      }

if (response.helloOk) {
        conn.helloOk = true;
      }

const supportedServerErr = checkSupportedServer(response, options);
      if (supportedServerErr) {
        callback(supportedServerErr);
        return;
      }

if (options.loadBalanced) {
        if (!response.serviceId) {
          return callback(
            new MongoCompatibilityError(
              'Driver attempted to initialize in load balancing mode, ' +
                'but the server does not support this mode.'
            )
          );
        }
      }

// NOTE: This is metadata attached to the connection while porting away from
      //       handshake being done in the `Server` class. Likely, it should be
      //       relocated, or at very least restructured.
      conn.hello = response;
      conn.lastHelloMS = new Date().getTime() - start;

if (!response.arbiterOnly && credentials) {
        // store the response on auth context
        authContext.response = response;

return;
      }

callback(undefined, conn);
    });
  });
}

export interface HandshakeDocument extends Document {
  /**
   * @deprecated Use hello instead
   */
  ismaster?: boolean;
  hello?: boolean;
  helloOk?: boolean;
  client: ClientMetadata;
  compression: string[];
  saslSupportedMechs?: string;
  loadBalanced?: boolean;
}

/**
 * @internal
 *
 * This function is only exposed for testing purposes.
 */
export function prepareHandshakeDocument(
  authContext: AuthContext,
  callback: Callback<HandshakeDocument>
) {
  const options = authContext.options;
  const compressors = options.compressors ? options.compressors : [];
  const { serverApi } = authContext.connection;

const handshakeDoc: HandshakeDocument = {
    [serverApi?.version ? 'hello' : LEGACY_HELLO_COMMAND]: true,
    helloOk: true,
    client: options.metadata || makeClientMetadata(options),
    compression: compressors
  };

if (options.loadBalanced === true) {
    handshakeDoc.loadBalanced = true;
  }

const credentials = authContext.credentials;
  if (credentials) {
    if (credentials.mechanism === AuthMechanism.MONGODB_DEFAULT && credentials.username) {
      handshakeDoc.saslSupportedMechs = `${credentials.source}.${credentials.username}`;

/** @public */
export const LEGAL_TLS_SOCKET_OPTIONS = [
  'ALPNProtocols',
  'ca',
  'cert',
  'checkServerIdentity',
  'ciphers',
  'crl',
  'ecdhCurve',
  'key',
  'minDHSize',
  'passphrase',
  'pfx',
  'rejectUnauthorized',
  'secureContext',
  'secureProtocol',
  'servername',
  'session'
] as const;

/** @public */
export const LEGAL_TCP_SOCKET_OPTIONS = [
  'family',
  'hints',
  'localAddress',
  'localPort',
  'lookup'
] as const;

function parseConnectOptions(options: ConnectionOptions): SocketConnectOpts {
  const hostAddress = options.hostAddress;
  if (!hostAddress) throw new MongoInvalidArgumentError('Option "hostAddress" is required');

const result: Partial<net.TcpNetConnectOpts & net.IpcNetConnectOpts> = {};
  for (const name of LEGAL_TCP_SOCKET_OPTIONS) {
    if (options[name] != null) {
      (result as Document)[name] = options[name];
    }
  }

if (typeof hostAddress.socketPath === 'string') {
    result.path = hostAddress.socketPath;
    return result as net.IpcNetConnectOpts;
  } else if (typeof hostAddress.host === 'string') {
    result.host = hostAddress.host;
    result.port = hostAddress.port;
    return result as net.TcpNetConnectOpts;
  } else {
    // This should never happen since we set up HostAddresses
    // But if we don't throw here the socket could hang until timeout
    // TODO(NODE-3483)
    throw new MongoRuntimeError(`Unexpected HostAddress ${JSON.stringify(hostAddress)}`);
  }
}

type MakeConnectionOptions = ConnectionOptions & { existingSocket?: Stream };

function parseSslOptions(options: MakeConnectionOptions): TLSConnectionOpts {
  const result: TLSConnectionOpts = parseConnectOptions(options);
  // Merge in valid SSL options
  for (const name of LEGAL_TLS_SOCKET_OPTIONS) {
    if (options[name] != null) {
      (result as Document)[name] = options[name];
    }
  }

if (options.existingSocket) {
    result.socket = options.existingSocket;
  }

// Set default sni servername to be the same as host
  if (result.servername == null && result.host && !net.isIP(result.host)) {
    result.servername = result.host;
  }

return result;
}

const SOCKET_ERROR_EVENT_LIST = ['error', 'close', 'timeout', 'parseError'] as const;
type ErrorHandlerEventName = typeof SOCKET_ERROR_EVENT_LIST[number] | 'cancel';
const SOCKET_ERROR_EVENTS = new Set(SOCKET_ERROR_EVENT_LIST);

function makeConnection(options: MakeConnectionOptions, _callback: Callback<Stream>) {
  const useTLS = options.tls ?? false;
  const keepAlive = options.keepAlive ?? true;
  const socketTimeoutMS = options.socketTimeoutMS ?? Reflect.get(options, 'socketTimeout') ?? 0;
  const noDelay = options.noDelay ?? true;
  const connectTimeoutMS = options.connectTimeoutMS ?? 30000;
  const rejectUnauthorized = options.rejectUnauthorized ?? true;
  const keepAliveInitialDelay =
    ((options.keepAliveInitialDelay ?? 120000) > socketTimeoutMS
      ? Math.round(socketTimeoutMS / 2)
      : options.keepAliveInitialDelay) ?? 120000;
  const existingSocket = options.existingSocket;

let socket: Stream;
  const callback: Callback<Stream> = function (err, ret) {
    if (err && socket) {
      socket.destroy();
    }

_callback(err, ret);
  };

if (options.proxyHost != null) {
    // Currently, only Socks5 is supported.
    return makeSocks5Connection(
      {
        ...options,
        connectTimeoutMS // Should always be present for Socks5
      },
      callback
    );
  }

if (useTLS) {
    const tlsSocket = tls.connect(parseSslOptions(options));
    if (typeof tlsSocket.disableRenegotiation === 'function') {
      tlsSocket.disableRenegotiation();
    }
    socket = tlsSocket;
  } else if (existingSocket) {
    // In the TLS case, parseSslOptions() sets options.socket to existingSocket,
    // so we only need to handle the non-TLS case here (where existingSocket
    // gives us all we need out of the box).
    socket = existingSocket;
  } else {
    socket = net.createConnection(parseConnectOptions(options));
  }

socket.setKeepAlive(keepAlive, keepAliveInitialDelay);
  socket.setTimeout(connectTimeoutMS);
  socket.setNoDelay(noDelay);

const connectEvent = useTLS ? 'secureConnect' : 'connect';
  let cancellationHandler: (err: Error) => void;
  function errorHandler(eventName: ErrorHandlerEventName) {
    return (err: Error) => {
      SOCKET_ERROR_EVENTS.forEach(event => socket.removeAllListeners(event));
      if (cancellationHandler && options.cancellationToken) {
        options.cancellationToken.removeListener('cancel', cancellationHandler);
      }

socket.removeListener(connectEvent, connectHandler);
      callback(connectionFailureError(eventName, err));
    };
  }

function connectHandler() {
    SOCKET_ERROR_EVENTS.forEach(event => socket.removeAllListeners(event));
    if (cancellationHandler && options.cancellationToken) {
      options.cancellationToken.removeListener('cancel', cancellationHandler);
    }

if ('authorizationError' in socket) {
      if (socket.authorizationError && rejectUnauthorized) {
        return callback(socket.authorizationError);
      }
    }

socket.setTimeout(socketTimeoutMS);
    callback(undefined, socket);
  }

SOCKET_ERROR_EVENTS.forEach(event => socket.once(event, errorHandler(event)));
  if (options.cancellationToken) {
    cancellationHandler = errorHandler('cancel');
    options.cancellationToken.once('cancel', cancellationHandler);
  }

if (existingSocket) {
    process.nextTick(connectHandler);
  } else {
    socket.once(connectEvent, connectHandler);
  }
}

function makeSocks5Connection(options: MakeConnectionOptions, callback: Callback<Stream>) {
  const hostAddress = HostAddress.fromHostPort(
    options.proxyHost ?? '', // proxyHost is guaranteed to set here
    options.proxyPort ?? 1080
  );

// First, connect to the proxy server itself:
  makeConnection(
    {
      ...options,
      hostAddress,
      tls: false,
      proxyHost: undefined
    },
    (err, rawSocket) => {
      if (err) {
        return callback(err);
      }

const destination = parseConnectOptions(options) as net.TcpNetConnectOpts;
      if (typeof destination.host !== 'string' || typeof destination.port !== 'number') {
        return callback(
          new MongoInvalidArgumentError('Can only make Socks5 connections to TCP hosts')
        );
      }

// Then, establish the Socks5 proxy connection:
      SocksClient.createConnection({
        existing_socket: rawSocket,
        timeout: options.connectTimeoutMS,
        command: 'connect',
        destination: {
          host: destination.host,
          port: destination.port
        },
        proxy: {
          // host and port are ignored because we pass existing_socket
          host: 'iLoveJavaScript',
          port: 0,
          type: 5,
          userId: options.proxyUsername || undefined,
          password: options.proxyPassword || undefined
        }
      }).then(
        ({ socket }) => {
          // Finally, now treat the resulting duplex stream as the
          // socket over which we send and receive wire protocol messages:
          makeConnection(
            {
              ...options,
              existingSocket: socket,
              proxyHost: undefined
            },
            callback
          );
        },
        error => callback(connectionFailureError('error', error))
      );
    }
  );
}

/**
 * The base export class for all monitoring events published from the connection pool
 * @public
 * @category Event
 */
export class ConnectionPoolMonitoringEvent {
  /** A timestamp when the event was created  */
  time: Date;
  /** The address (host/port pair) of the pool */
  address: string;

/** @internal */
  constructor(pool: ConnectionPool) {
    this.time = new Date();
    this.address = pool.address;
  }
}

/**
 * An event published when a connection pool is created
 * @public
 * @category Event
 */
export class ConnectionPoolCreatedEvent extends ConnectionPoolMonitoringEvent {
  /** The options used to create this connection pool */
  options?: ConnectionPoolOptions;

/** @internal */
  constructor(pool: ConnectionPool) {
    super(pool);
    this.options = pool.options;
  }
}

/**
 * An event published when a connection pool is ready
 * @public
 * @category Event
 */
export class ConnectionPoolReadyEvent extends ConnectionPoolMonitoringEvent {
  /** @internal */
  constructor(pool: ConnectionPool) {
    super(pool);
  }
}

/**
 * An event published when a connection pool is closed
 * @public
 * @category Event
 */
export class ConnectionPoolClosedEvent extends ConnectionPoolMonitoringEvent {
  /** @internal */
  constructor(pool: ConnectionPool) {
    super(pool);
  }
}

/**
 * An event published when a connection pool creates a new connection
 * @public
 * @category Event
 */
export class ConnectionCreatedEvent extends ConnectionPoolMonitoringEvent {
  /** A monotonically increasing, per-pool id for the newly created connection */
  connectionId: number | '<monitor>';

/** @internal */
  constructor(pool: ConnectionPool, connection: { id: number | '<monitor>' }) {
    super(pool);
    this.connectionId = connection.id;
  }
}

/**
 * An event published when a connection is ready for use
 * @public
 * @category Event
 */
export class ConnectionReadyEvent extends ConnectionPoolMonitoringEvent {
  /** The id of the connection */
  connectionId: number | '<monitor>';

/** @internal */
  constructor(pool: ConnectionPool, connection: Connection) {
    super(pool);
    this.connectionId = connection.id;
  }
}

/**
 * An event published when a connection is closed
 * @public
 * @category Event
 */
export class ConnectionClosedEvent extends ConnectionPoolMonitoringEvent {
  /** The id of the connection */
  connectionId: number | '<monitor>';
  /** The reason the connection was closed */
  reason: string;
  serviceId?: ObjectId;

/** @internal */
  constructor(
    pool: ConnectionPool,
    connection: Pick<Connection, 'id' | 'serviceId'>,
    reason: string
  ) {
    super(pool);
    this.connectionId = connection.id;
    this.reason = reason || 'unknown';
    this.serviceId = connection.serviceId;
  }
}

/**
 * An event published when a request to check a connection out begins
 * @public
 * @category Event
 */
export class ConnectionCheckOutStartedEvent extends ConnectionPoolMonitoringEvent {
  /** @internal */
  constructor(pool: ConnectionPool) {
    super(pool);
  }
}

/**
 * An event published when a request to check a connection out fails
 * @public
 * @category Event
 */
export class ConnectionCheckOutFailedEvent extends ConnectionPoolMonitoringEvent {
  /** The reason the attempt to check out failed */
  reason: AnyError | string;

/** @internal */
  constructor(pool: ConnectionPool, reason: AnyError | string) {
    super(pool);
    this.reason = reason;
  }
}

/**
 * An event published when a connection is checked out of the connection pool
 * @public
 * @category Event
 */
export class ConnectionCheckedOutEvent extends ConnectionPoolMonitoringEvent {
  /** The id of the connection */
  connectionId: number | '<monitor>';

/** @internal */
  constructor(pool: ConnectionPool, connection: Connection) {
    super(pool);
    this.connectionId = connection.id;
  }
}

/**
 * An event published when a connection is checked into the connection pool
 * @public
 * @category Event
 */
export class ConnectionCheckedInEvent extends ConnectionPoolMonitoringEvent {
  /** The id of the connection */
  connectionId: number | '<monitor>';

/** @internal */
  constructor(pool: ConnectionPool, connection: Connection) {
    super(pool);
    this.connectionId = connection.id;
  }
}

/**
 * An event published when a connection pool is cleared
 * @public
 * @category Event
 */
export class ConnectionPoolClearedEvent extends ConnectionPoolMonitoringEvent {
  /** @internal */
  serviceId?: ObjectId;

interruptInUseConnections?: boolean;

/** @internal */
  constructor(
    pool: ConnectionPool,
    options: { serviceId?: ObjectId; interruptInUseConnections?: boolean } = {}
  ) {
    super(pool);
    this.serviceId = options.serviceId;
    this.interruptInUseConnections = options.interruptInUseConnections;
  }
}
PK������O[�vIY��Y��
��connection.tsnu�ȯ����������import { clearTimeout, setTimeout } from 'timers';

import type { BSONSerializeOptions, Document, ObjectId } from '../bson';
import {
  CLOSE,
  CLUSTER_TIME_RECEIVED,
  COMMAND_FAILED,
  COMMAND_STARTED,
  COMMAND_SUCCEEDED,
  MESSAGE,
  PINNED,
  UNPINNED
} from '../constants';
import type { AutoEncrypter } from '../deps';
import {
  MongoCompatibilityError,
  MongoMissingDependencyError,
  MongoNetworkError,
  MongoNetworkTimeoutError,
  MongoRuntimeError,
  MongoServerError,
  MongoWriteConcernError
} from '../error';
import type { ServerApi, SupportedNodeConnectionOptions } from '../mongo_client';
import { CancellationToken, TypedEventEmitter } from '../mongo_types';
import type { ReadPreferenceLike } from '../read_preference';
import { applySession, ClientSession, updateSessionFromResponse } from '../sessions';
import {
  calculateDurationInMs,
  Callback,
  ClientMetadata,
  HostAddress,
  maxWireVersion,
  MongoDBNamespace,
  now,
  uuidV4
} from '../utils';
import type { WriteConcern } from '../write_concern';
import type { MongoCredentials } from './auth/mongo_credentials';
import {
  CommandFailedEvent,
  CommandStartedEvent,
  CommandSucceededEvent
} from './command_monitoring_events';
import { BinMsg, Msg, Query, Response, WriteProtocolMessageType } from './commands';
import type { Stream } from './connect';
import { MessageStream, OperationDescription } from './message_stream';
import { StreamDescription, StreamDescriptionOptions } from './stream_description';
import { getReadPreference, isSharded } from './wire_protocol/shared';

/** @internal */
const kStream = Symbol('stream');
/** @internal */
const kQueue = Symbol('queue');
/** @internal */
const kMessageStream = Symbol('messageStream');
/** @internal */
const kGeneration = Symbol('generation');
/** @internal */
const kLastUseTime = Symbol('lastUseTime');
/** @internal */
const kClusterTime = Symbol('clusterTime');
/** @internal */
const kDescription = Symbol('description');
/** @internal */
const kHello = Symbol('hello');
/** @internal */
const kAutoEncrypter = Symbol('autoEncrypter');
/** @internal */
const kDelayedTimeoutId = Symbol('delayedTimeoutId');

const INVALID_QUEUE_SIZE = 'Connection internal queue contains more than 1 operation description';

/** @internal */
export interface CommandOptions extends BSONSerializeOptions {
  command?: boolean;
  secondaryOk?: boolean;
  /** Specify read preference if command supports it */
  readPreference?: ReadPreferenceLike;
  monitoring?: boolean;
  socketTimeoutMS?: number;
  /** Session to use for the operation */
  session?: ClientSession;
  documentsReturnedIn?: string;
  noResponse?: boolean;
  omitReadPreference?: boolean;

// TODO(NODE-2802): Currently the CommandOptions take a property willRetryWrite which is a hint
  // from executeOperation that the txnNum should be applied to this command.
  // Applying a session to a command should happen as part of command construction,
  // most likely in the CommandOperation#executeCommand method, where we have access to
  // the details we need to determine if a txnNum should also be applied.
  willRetryWrite?: boolean;

writeConcern?: WriteConcern;
}

/** @internal */
export interface GetMoreOptions extends CommandOptions {
  batchSize?: number;
  maxTimeMS?: number;
  maxAwaitTimeMS?: number;
  /**
   * Comment to apply to the operation.
   *
   * In server versions pre-4.4, 'comment' must be string.  A server
   * error will be thrown if any other type is provided.
   *
   * In server versions 4.4 and above, 'comment' can be any valid BSON type.
   */
  comment?: unknown;
}

/** @public */
export interface ProxyOptions {
  proxyHost?: string;
  proxyPort?: number;
  proxyUsername?: string;
  proxyPassword?: string;
}

/** @public */
export interface ConnectionOptions
  extends SupportedNodeConnectionOptions,
    StreamDescriptionOptions,
    ProxyOptions {
  // Internal creation info
  id: number | '<monitor>';
  generation: number;
  hostAddress: HostAddress;
  // Settings
  autoEncrypter?: AutoEncrypter;
  serverApi?: ServerApi;
  monitorCommands: boolean;
  /** @internal */
  connectionType?: typeof Connection;
  credentials?: MongoCredentials;
  connectTimeoutMS?: number;
  tls: boolean;
  keepAlive?: boolean;
  keepAliveInitialDelay?: number;
  noDelay?: boolean;
  socketTimeoutMS?: number;
  cancellationToken?: CancellationToken;

metadata: ClientMetadata;
}

/** @public */
export interface DestroyOptions {
  /** Force the destruction. */
  force?: boolean;
}

/** @public */
export type ConnectionEvents = {
  commandStarted(event: CommandStartedEvent): void;
  commandSucceeded(event: CommandSucceededEvent): void;
  commandFailed(event: CommandFailedEvent): void;
  clusterTimeReceived(clusterTime: Document): void;
  close(): void;
  message(message: any): void;
  pinned(pinType: string): void;
  unpinned(pinType: string): void;
};

/** @internal */
export class Connection extends TypedEventEmitter<ConnectionEvents> {
  id: number | '<monitor>';
  address: string;
  socketTimeoutMS: number;
  monitorCommands: boolean;
  closed: boolean;
  destroyed: boolean;
  lastHelloMS?: number;
  serverApi?: ServerApi;
  helloOk?: boolean;

/**@internal */
  [kDelayedTimeoutId]: NodeJS.Timeout | null;
  /** @internal */
  [kDescription]: StreamDescription;
  /** @internal */
  [kGeneration]: number;
  /** @internal */
  [kLastUseTime]: number;
  /** @internal */
  [kQueue]: Map<number, OperationDescription>;
  /** @internal */
  [kMessageStream]: MessageStream;
  /** @internal */
  [kStream]: Stream;
  /** @internal */
  [kHello]: Document | null;
  /** @internal */
  [kClusterTime]: Document | null;

/** @event */
  static readonly COMMAND_STARTED = COMMAND_STARTED;
  /** @event */
  static readonly COMMAND_SUCCEEDED = COMMAND_SUCCEEDED;
  /** @event */
  static readonly COMMAND_FAILED = COMMAND_FAILED;
  /** @event */
  static readonly CLUSTER_TIME_RECEIVED = CLUSTER_TIME_RECEIVED;
  /** @event */
  static readonly CLOSE = CLOSE;
  /** @event */
  static readonly MESSAGE = MESSAGE;
  /** @event */
  static readonly PINNED = PINNED;
  /** @event */
  static readonly UNPINNED = UNPINNED;

constructor(stream: Stream, options: ConnectionOptions) {
    super();
    this.id = options.id;
    this.address = streamIdentifier(stream, options);
    this.socketTimeoutMS = options.socketTimeoutMS ?? 0;
    this.monitorCommands = options.monitorCommands;
    this.serverApi = options.serverApi;
    this.closed = false;
    this.destroyed = false;
    this[kHello] = null;
    this[kClusterTime] = null;

this[kDescription] = new StreamDescription(this.address, options);
    this[kGeneration] = options.generation;
    this[kLastUseTime] = now();

// setup parser stream and message handling
    this[kQueue] = new Map();
    this[kMessageStream] = new MessageStream({
      ...options,
      maxBsonMessageSize: this.hello?.maxBsonMessageSize
    });
    this[kStream] = stream;

this[kDelayedTimeoutId] = null;

this[kMessageStream].on('message', message => this.onMessage(message));
    this[kMessageStream].on('error', error => this.onError(error));
    this[kStream].on('close', () => this.onClose());
    this[kStream].on('timeout', () => this.onTimeout());
    this[kStream].on('error', () => {
      /* ignore errors, listen to `close` instead */
    });

// hook the message stream up to the passed in stream
    this[kStream].pipe(this[kMessageStream]);
    this[kMessageStream].pipe(this[kStream]);
  }

get description(): StreamDescription {
    return this[kDescription];
  }

get hello(): Document | null {
    return this[kHello];
  }

// the `connect` method stores the result of the handshake hello on the connection
  set hello(response: Document | null) {
    this[kDescription].receiveResponse(response);
    this[kDescription] = Object.freeze(this[kDescription]);

// TODO: remove this, and only use the `StreamDescription` in the future
    this[kHello] = response;
  }

// Set the whether the message stream is for a monitoring connection.
  set isMonitoringConnection(value: boolean) {
    this[kMessageStream].isMonitoringConnection = value;
  }

get isMonitoringConnection(): boolean {
    return this[kMessageStream].isMonitoringConnection;
  }

get serviceId(): ObjectId | undefined {
    return this.hello?.serviceId;
  }

get loadBalanced(): boolean {
    return this.description.loadBalanced;
  }

get generation(): number {
    return this[kGeneration] || 0;
  }

set generation(generation: number) {
    this[kGeneration] = generation;
  }

get idleTime(): number {
    return calculateDurationInMs(this[kLastUseTime]);
  }

get clusterTime(): Document | null {
    return this[kClusterTime];
  }

get stream(): Stream {
    return this[kStream];
  }

markAvailable(): void {
    this[kLastUseTime] = now();
  }

onError(error: Error) {
    if (this.closed) {
      return;
    }

this[kStream].destroy(error);

this.closed = true;

for (const op of this[kQueue].values()) {
      op.cb(error);
    }

this[kQueue].clear();
    this.emit(Connection.CLOSE);
  }

onClose() {
    if (this.closed) {
      return;
    }

this.closed = true;

const message = `connection ${this.id} to ${this.address} closed`;
    for (const op of this[kQueue].values()) {
      op.cb(new MongoNetworkError(message));
    }

this[kQueue].clear();
    this.emit(Connection.CLOSE);
  }

onTimeout() {
    if (this.closed) {
      return;
    }

this[kDelayedTimeoutId] = setTimeout(() => {
      this[kStream].destroy();

this.closed = true;

this[kQueue].clear();
      this.emit(Connection.CLOSE);
    }, 1).unref(); // No need for this timer to hold the event loop open
  }

onMessage(message: BinMsg | Response) {
    const delayedTimeoutId = this[kDelayedTimeoutId];
    if (delayedTimeoutId != null) {
      clearTimeout(delayedTimeoutId);
      this[kDelayedTimeoutId] = null;
    }

// always emit the message, in case we are streaming
    this.emit('message', message);
    let operationDescription = this[kQueue].get(message.responseTo);

if (!operationDescription && this.isMonitoringConnection) {
      // This is how we recover when the initial hello's requestId is not
      // the responseTo when hello responses have been skipped:

// First check if the map is of invalid size
      if (this[kQueue].size > 1) {
        this.onError(new MongoRuntimeError(INVALID_QUEUE_SIZE));
      } else {
        // Get the first orphaned operation description.
        const entry = this[kQueue].entries().next();
        if (entry.value != null) {
          const [requestId, orphaned]: [number, OperationDescription] = entry.value;
          // If the orphaned operation description exists then set it.
          operationDescription = orphaned;
          // Remove the entry with the bad request id from the queue.
          this[kQueue].delete(requestId);
        }
      }
    }

if (!operationDescription) {
      return;
    }

const callback = operationDescription.cb;

// SERVER-45775: For exhaust responses we should be able to use the same requestId to
    // track response, however the server currently synthetically produces remote requests
    // making the `responseTo` change on each response
    this[kQueue].delete(message.responseTo);
    if ('moreToCome' in message && message.moreToCome) {
      // If the operation description check above does find an orphaned
      // description and sets the operationDescription then this line will put one
      // back in the queue with the correct requestId and will resolve not being able
      // to find the next one via the responseTo of the next streaming hello.
      this[kQueue].set(message.requestId, operationDescription);
    } else if (operationDescription.socketTimeoutOverride) {
      this[kStream].setTimeout(this.socketTimeoutMS);
    }

try {
      // Pass in the entire description because it has BSON parsing options
      message.parse(operationDescription);
    } catch (err) {
      // If this error is generated by our own code, it will already have the correct class applied
      // if it is not, then it is coming from a catastrophic data parse failure or the BSON library
      // in either case, it should not be wrapped
      callback(err);
      return;
    }

if (message.documents[0]) {
      const document: Document = message.documents[0];
      const session = operationDescription.session;
      if (session) {
        updateSessionFromResponse(session, document);
      }

if (document.$clusterTime) {
        this[kClusterTime] = document.$clusterTime;
        this.emit(Connection.CLUSTER_TIME_RECEIVED, document.$clusterTime);
      }

if (operationDescription.command) {
        if (document.writeConcernError) {
          callback(new MongoWriteConcernError(document.writeConcernError, document));
          return;
        }

if (document.ok === 0 || document.$err || document.errmsg || document.code) {
          callback(new MongoServerError(document));
          return;
        }
      } else {
        // Pre 3.2 support
        if (document.ok === 0 || document.$err || document.errmsg) {
          callback(new MongoServerError(document));
          return;
        }
      }
    }

callback(undefined, message.documents[0]);
  }

destroy(options?: DestroyOptions, callback?: Callback): void {
    if (typeof options === 'function') {
      callback = options;
      options = { force: false };
    }

this.removeAllListeners(Connection.PINNED);
    this.removeAllListeners(Connection.UNPINNED);

options = Object.assign({ force: false }, options);
    if (this[kStream] == null || this.destroyed) {
      this.destroyed = true;
      if (typeof callback === 'function') {
        callback();
      }

return;
    }

if (options.force) {
      this[kStream].destroy();
      this.destroyed = true;
      if (typeof callback === 'function') {
        callback();
      }

return;
    }

this[kStream].end(() => {
      this.destroyed = true;
      if (typeof callback === 'function') {
        callback();
      }
    });
  }

command(
    ns: MongoDBNamespace,
    cmd: Document,
    options: CommandOptions | undefined,
    callback: Callback
  ): void {
    const readPreference = getReadPreference(cmd, options);
    const shouldUseOpMsg = supportsOpMsg(this);
    const session = options?.session;

let clusterTime = this.clusterTime;
    let finalCmd = Object.assign({}, cmd);

if (this.serverApi) {
      const { version, strict, deprecationErrors } = this.serverApi;
      finalCmd.apiVersion = version;
      if (strict != null) finalCmd.apiStrict = strict;
      if (deprecationErrors != null) finalCmd.apiDeprecationErrors = deprecationErrors;
    }

if (hasSessionSupport(this) && session) {
      if (
        session.clusterTime &&
        clusterTime &&
        session.clusterTime.clusterTime.greaterThan(clusterTime.clusterTime)
      ) {
        clusterTime = session.clusterTime;
      }

const err = applySession(session, finalCmd, options);
      if (err) {
        return callback(err);
      }
    }

// if we have a known cluster time, gossip it
    if (clusterTime) {
      finalCmd.$clusterTime = clusterTime;
    }

if (isSharded(this) && !shouldUseOpMsg && readPreference && readPreference.mode !== 'primary') {
      finalCmd = {
        $query: finalCmd,
        $readPreference: readPreference.toJSON()
      };
    }

const commandOptions: Document = Object.assign(
      {
        command: true,
        numberToSkip: 0,
        numberToReturn: -1,
        checkKeys: false,
        // This value is not overridable
        secondaryOk: readPreference.secondaryOk()
      },
      options
    );

const cmdNs = `${ns.db}.$cmd`;
    const message = shouldUseOpMsg
      ? new Msg(cmdNs, finalCmd, commandOptions)
      : new Query(cmdNs, finalCmd, commandOptions);

try {
      write(this, message, commandOptions, callback);
    } catch (err) {
      callback(err);
    }
  }
}

/** @internal */
export class CryptoConnection extends Connection {
  /** @internal */
  [kAutoEncrypter]?: AutoEncrypter;

constructor(stream: Stream, options: ConnectionOptions) {
    super(stream, options);
    this[kAutoEncrypter] = options.autoEncrypter;
  }

/** @internal @override */
  override command(
    ns: MongoDBNamespace,
    cmd: Document,
    options: CommandOptions,
    callback: Callback
  ): void {
    const autoEncrypter = this[kAutoEncrypter];
    if (!autoEncrypter) {
      return callback(new MongoMissingDependencyError('No AutoEncrypter available for encryption'));
    }

const serverWireVersion = maxWireVersion(this);
    if (serverWireVersion === 0) {
      // This means the initial handshake hasn't happened yet
      return super.command(ns, cmd, options, callback);
    }

if (serverWireVersion < 8) {
      callback(
        new MongoCompatibilityError('Auto-encryption requires a minimum MongoDB version of 4.2')
      );
      return;
    }

// Save sort or indexKeys based on the command being run
    // the encrypt API serializes our JS objects to BSON to pass to the native code layer
    // and then deserializes the encrypted result, the protocol level components
    // of the command (ex. sort) are then converted to JS objects potentially losing
    // import key order information. These fields are never encrypted so we can save the values
    // from before the encryption and replace them after encryption has been performed
    const sort: Map<string, number> | null = cmd.find || cmd.findAndModify ? cmd.sort : null;
    const indexKeys: Map<string, number>[] | null = cmd.createIndexes
      ? cmd.indexes.map((index: { key: Map<string, number> }) => index.key)
      : null;

autoEncrypter.encrypt(ns.toString(), cmd, options, (err, encrypted) => {
      if (err || encrypted == null) {
        callback(err, null);
        return;
      }

// Replace the saved values
      if (sort != null && (cmd.find || cmd.findAndModify)) {
        encrypted.sort = sort;
      }
      if (indexKeys != null && cmd.createIndexes) {
        for (const [offset, index] of indexKeys.entries()) {
          encrypted.indexes[offset].key = index;
        }
      }

super.command(ns, encrypted, options, (err, response) => {
        if (err || response == null) {
          callback(err, response);
          return;
        }

autoEncrypter.decrypt(response, options, callback);
      });
    });
  }
}

/** @internal */
export function hasSessionSupport(conn: Connection): boolean {
  const description = conn.description;
  return description.logicalSessionTimeoutMinutes != null || !!description.loadBalanced;
}

function supportsOpMsg(conn: Connection) {
  const description = conn.description;
  if (description == null) {
    return false;
  }

return maxWireVersion(conn) >= 6 && !description.__nodejs_mock_server__;
}

function streamIdentifier(stream: Stream, options: ConnectionOptions): string {
  if (options.proxyHost) {
    // If proxy options are specified, the properties of `stream` itself
    // will not accurately reflect what endpoint this is connected to.
    return options.hostAddress.toString();
  }

const { remoteAddress, remotePort } = stream;
  if (typeof remoteAddress === 'string' && typeof remotePort === 'number') {
    return HostAddress.fromHostPort(remoteAddress, remotePort).toString();
  }

return uuidV4().toString('hex');
}

function write(
  conn: Connection,
  command: WriteProtocolMessageType,
  options: CommandOptions,
  callback: Callback
) {
  options = options ?? {};
  const operationDescription: OperationDescription = {
    requestId: command.requestId,
    cb: callback,
    session: options.session,
    noResponse: typeof options.noResponse === 'boolean' ? options.noResponse : false,
    documentsReturnedIn: options.documentsReturnedIn,
    command: !!options.command,

// for BSON parsing
    promoteLongs: typeof options.promoteLongs === 'boolean' ? options.promoteLongs : true,
    promoteValues: typeof options.promoteValues === 'boolean' ? options.promoteValues : true,
    promoteBuffers: typeof options.promoteBuffers === 'boolean' ? options.promoteBuffers : false,
    bsonRegExp: typeof options.bsonRegExp === 'boolean' ? options.bsonRegExp : false,
    enableUtf8Validation:
      typeof options.enableUtf8Validation === 'boolean' ? options.enableUtf8Validation : true,
    raw: typeof options.raw === 'boolean' ? options.raw : false,
    started: 0
  };

if (conn[kDescription] && conn[kDescription].compressor) {
    operationDescription.agreedCompressor = conn[kDescription].compressor;

if (conn[kDescription].zlibCompressionLevel) {
      operationDescription.zlibCompressionLevel = conn[kDescription].zlibCompressionLevel;
    }
  }

if (typeof options.socketTimeoutMS === 'number') {
    operationDescription.socketTimeoutOverride = true;
    conn[kStream].setTimeout(options.socketTimeoutMS);
  }

// if command monitoring is enabled we need to modify the callback here
  if (conn.monitorCommands) {
    conn.emit(Connection.COMMAND_STARTED, new CommandStartedEvent(conn, command));

operationDescription.started = now();
    operationDescription.cb = (err, reply) => {
      if (err) {
        conn.emit(
          Connection.COMMAND_FAILED,
          new CommandFailedEvent(conn, command, err, operationDescription.started)
        );
      } else {
        if (reply && (reply.ok === 0 || reply.$err)) {
          conn.emit(
            Connection.COMMAND_FAILED,
            new CommandFailedEvent(conn, command, reply, operationDescription.started)
          );
        } else {
          conn.emit(
            Connection.COMMAND_SUCCEEDED,
            new CommandSucceededEvent(conn, command, reply, operationDescription.started)
          );
        }
      }

if (typeof callback === 'function') {
        callback(err, reply);
      }
    };
  }

if (!operationDescription.noResponse) {
    conn[kQueue].set(operationDescription.requestId, operationDescription);
  }

try {
    conn[kMessageStream].writeCommand(command, operationDescription);
  } catch (e) {
    if (!operationDescription.noResponse) {
      conn[kQueue].delete(operationDescription.requestId);
      operationDescription.cb(e);
      return;
    }
  }

if (operationDescription.noResponse) {
    operationDescription.cb();
  }
}
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