805 lines
21 KiB
JavaScript
805 lines
21 KiB
JavaScript
// Copyright 2011 Mark Cavage, Inc. All rights reserved.
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var assert = require('assert');
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var EventEmitter = require('events').EventEmitter;
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var net = require('net');
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var tls = require('tls');
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var util = require('util');
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var asn1 = require('asn1');
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var sprintf = require('sprintf').sprintf;
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var dn = require('./dn');
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var dtrace = require('./dtrace');
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var errors = require('./errors');
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var Protocol = require('./protocol');
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var logStub = require('./log_stub');
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var Parser = require('./messages').Parser;
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var AddResponse = require('./messages/add_response');
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var BindResponse = require('./messages/bind_response');
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var CompareResponse = require('./messages/compare_response');
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var DeleteResponse = require('./messages/del_response');
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var ExtendedResponse = require('./messages/ext_response');
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var LDAPResult = require('./messages/result');
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var ModifyResponse = require('./messages/modify_response');
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var ModifyDNResponse = require('./messages/moddn_response');
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var SearchRequest = require('./messages/search_request');
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var SearchResponse = require('./messages/search_response');
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var UnbindResponse = require('./messages/unbind_response');
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///--- Globals
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var Ber = asn1.Ber;
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var BerReader = asn1.BerReader;
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var DN = dn.DN;
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///--- Helpers
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function mergeFunctionArgs(argv, start, end) {
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assert.ok(argv);
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if (!start)
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start = 0;
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if (!end)
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end = argv.length;
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var handlers = [];
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for (var i = start; i < end; i++) {
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if (argv[i] instanceof Array) {
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var arr = argv[i];
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for (var j = 0; j < arr.length; j++) {
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if (!(arr[j] instanceof Function)) {
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throw new TypeError('Invalid argument type: ' + typeof(arr[j]));
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}
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handlers.push(arr[j]);
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}
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} else if (argv[i] instanceof Function) {
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handlers.push(argv[i]);
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} else {
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throw new TypeError('Invalid argument type: ' + typeof(argv[i]));
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}
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}
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return handlers;
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}
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function getResponse(req) {
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assert.ok(req);
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var Response;
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switch (req.protocolOp) {
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case Protocol.LDAP_REQ_BIND:
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Response = BindResponse;
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break;
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case Protocol.LDAP_REQ_ABANDON:
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return; // Noop
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case Protocol.LDAP_REQ_ADD:
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Response = AddResponse;
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break;
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case Protocol.LDAP_REQ_COMPARE:
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Response = CompareResponse;
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break;
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case Protocol.LDAP_REQ_DELETE:
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Response = DeleteResponse;
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break;
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case Protocol.LDAP_REQ_EXTENSION:
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Response = ExtendedResponse;
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break;
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case Protocol.LDAP_REQ_MODIFY:
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Response = ModifyResponse;
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break;
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case Protocol.LDAP_REQ_MODRDN:
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Response = ModifyDNResponse;
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break;
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case Protocol.LDAP_REQ_SEARCH:
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Response = SearchResponse;
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break;
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case Protocol.LDAP_REQ_UNBIND:
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Response = UnbindResponse;
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break;
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default:
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return null;
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}
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assert.ok(Response);
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var res = new Response({
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messageID: req.messageID,
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log4js: req.log4js,
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attributes: ((req instanceof SearchRequest) ? req.attributes : undefined)
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});
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res.connection = req.connection;
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res.logId = req.logId;
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return res;
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}
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function defaultHandler(req, res, next) {
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assert.ok(req);
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assert.ok(res);
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assert.ok(next);
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res.matchedDN = req.dn.toString();
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res.errorMessage = 'Server method not implemented';
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res.end(errors.LDAP_OTHER);
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return next();
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}
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function defaultUnbindHandler(req, res, next) {
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assert.ok(req);
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assert.ok(res);
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assert.ok(next);
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res.end();
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return next();
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}
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function defaultAnonymousBindHandler(req, res, next) {
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assert.ok(req);
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assert.ok(res);
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assert.ok(next);
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res.end();
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return next();
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}
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function noSuffixHandler(req, res, next) {
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assert.ok(req);
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assert.ok(res);
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assert.ok(next);
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res.errorMessage = 'No tree found for: ' + req.dn.toString();
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res.end(errors.LDAP_NO_SUCH_OBJECT);
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return next();
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}
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function noExOpHandler(req, res, next) {
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assert.ok(req);
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assert.ok(res);
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assert.ok(next);
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res.errorMessage = req.requestName + ' not supported';
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res.end(errors.LDAP_PROTOCOL_ERROR);
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return next();
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}
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function getArgumentsWithDTrace(args, op, cb1, cb2) {
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assert.ok(op);
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var index = 0;
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if (typeof(args[0]) === 'object')
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index = 1;
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args.splice(index, 0, function(req, res, next) {
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dtrace.fire(op, function() {
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var c = req.connection;
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return [
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req.logId,
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c.remoteAddress,
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c.ldap.bindDN.toString(),
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req.dn.toString(),
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cb1 ? cb1(req, res) : undefined,
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cb2 ? cb2(req, res) : undefined
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];
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});
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return next();
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});
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return args;
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}
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///--- API
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/**
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* Constructs a new server that you can call .listen() on, in the various
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* forms node supports. You need to first assign some handlers to the various
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* LDAP operations however.
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*
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* The options object currently only takes a certificate/private key, and a
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* log4js handle.
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*
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* This object exposes the following events:
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* - 'error'
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* - 'close'
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*
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* @param {Object} options (optional) parameterization object.
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* @throws {TypeError} on bad input.
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*/
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function Server(options) {
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if (options) {
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if (typeof(options) !== 'object')
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throw new TypeError('options (object) required');
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if (options.log4js && typeof(options.log4js) !== 'object')
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throw new TypeError('options.log4s must be an object');
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if (options.certificate || options.key) {
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if (!(options.certificate && options.key) ||
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typeof(options.certificate) !== 'string' ||
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typeof(options.key) !== 'string') {
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throw new TypeError('options.certificate and options.key (string) ' +
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'are both required for TLS');
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}
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}
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} else {
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options = {};
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}
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var self = this;
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if (!options.log4js)
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options.log4js = logStub;
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EventEmitter.call(this, options);
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this.log = options.log4js.getLogger('Server');
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var log = this.log;
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function setupConnection(c) {
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assert.ok(c);
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if (c.type === 'unix') {
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c.remoteAddress = self.server.path;
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c.remotePort = c.fd;
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}
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var rdn = new dn.RDN({cn: 'anonymous'});
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c.ldap = {
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id: c.remoteAddress + ':' + c.remotePort,
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config: options,
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_bindDN: new DN([rdn])
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};
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c.addListener('timeout', function() {
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log.trace('%s timed out', c.ldap.id);
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c.destroy();
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});
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c.addListener('end', function() {
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log.trace('%s shutdown', c.ldap.id);
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});
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c.addListener('error', function(err) {
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log.warn('%s unexpected connection error', c.ldap.id, err);
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c.destroy();
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});
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c.addListener('close', function(had_err) {
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log.trace('%s close; had_err=%j', c.ldap.id, had_err);
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c.end();
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});
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c.ldap.__defineGetter__('bindDN', function() {
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return c.ldap._bindDN;
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});
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c.ldap.__defineSetter__('bindDN', function(val) {
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if (!(val instanceof DN))
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throw new TypeError('DN required');
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c.ldap._bindDN = val;
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return val;
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});
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return c;
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}
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function newConnection(c) {
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setupConnection(c);
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if (log.isTraceEnabled())
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log.trace('new connection from %s', c.ldap.id);
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dtrace.fire('connection', function() { return [c.remoteAddress]; });
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c.parser = new Parser({
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log4js: options.log4js
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});
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c.parser.on('message', function(req) {
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req.connection = c;
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req.logId = c.ldap.id + '::' + req.messageID;
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req.startTime = new Date().getTime();
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if (log.isDebugEnabled())
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log.debug('%s: message received: req=%j', c.ldap.id, req.json);
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dtrace.fire('request', function() {
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return [
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req.logId,
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c.remoteAddress,
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c.ldap.bindDN.toString(),
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req.dn.toString()
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];
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});
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var res = getResponse(req);
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if (!res) {
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log.warn('Unimplemented server method: %s', req.type);
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c.destroy();
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return;
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}
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res.connection = c;
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res.logId = req.logId;
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res.requestDN = req.dn;
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var chain = self._getHandlerChain(req);
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//.concat(this._postChain || []);
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var i = 0;
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return function(err) {
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function sendError(err) {
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res.status = err.code || errors.LDAP_OPERATIONS_ERROR;
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res.matchedDN = req.suffix ? req.suffix.toString() : '';
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res.errorMessage = err.message || '';
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return res.end();
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}
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function after() {
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if (!self._postChain || !self._postChain.length)
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return;
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function next() {} // stub out next for the post chain
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self._postChain.forEach(function(c) {
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c.call(self, req, res, next);
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});
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}
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if (err) {
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sendError(err);
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return after();
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}
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try {
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var next = arguments.callee;
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if (chain.handlers[i])
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return chain.handlers[i++].call(chain.backend, req, res, next);
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if (req.protocolOp === Protocol.LDAP_REQ_BIND && res.status === 0)
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c.ldap.bindDN = req.dn;
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return after();
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} catch (e) {
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if (!e.stack)
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e.stack = e.toString();
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log.error('%s uncaught exception: %s', req.logId, e.stack);
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return sendError(new errors.OperationsError(e.message));
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}
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}();
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});
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c.parser.on('error', function(err, message) {
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log.error('Exception happened parsing for %s: %s',
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c.ldap.id, err.stack);
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var res = getResponse(message);
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if (res) {
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res.status = 0x02; // protocol error
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res.errorMessage = err.toString();
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c.end(res.toBer());
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} else {
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c.destroy();
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}
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});
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c.on('data', function(data) {
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if (log.isTraceEnabled())
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log.trace('data on %s: %s', c.ldap.id, util.inspect(data));
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c.parser.write(data);
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});
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}; // end newConnection
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this.routes = {};
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if (options.certificate && options.key) {
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this.server = tls.createServer(options, newConnection);
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} else {
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this.server = net.createServer(newConnection);
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}
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this.server.log4js = options.log4js;
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this.server.ldap = {
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config: options
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};
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this.server.on('close', function() {
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self.emit('close');
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});
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this.server.on('error', function(err) {
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self.emit('error', err);
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});
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this.__defineGetter__('maxConnections', function() {
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return self.server.maxConnections;
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});
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this.__defineSetter__('maxConnections', function(val) {
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self.server.maxConnections = val;
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});
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this.__defineGetter__('connections', function() {
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return self.server.connections;
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});
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this.__defineGetter__('name', function() {
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return 'LDAPServer';
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});
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this.__defineGetter__('url', function() {
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var str;
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if (options.certificate && options.key) {
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str = 'ldaps://';
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} else {
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str = 'ldap://';
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}
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str += self.host || 'localhost';
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str += ':';
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str += self.port || 389;
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return str;
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});
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}
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util.inherits(Server, EventEmitter);
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module.exports = Server;
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/**
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* Adds a handler (chain) for the LDAP add method.
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*
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* Note that this is of the form f(name, [function]) where the second...N
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* arguments can all either be functions or arrays of functions.
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*
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* @param {String} name the DN to mount this handler chain at.
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* @return {Server} this so you can chain calls.
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* @throws {TypeError} on bad input
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*/
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Server.prototype.add = function(name) {
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var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
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'add',
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function(req, res) {
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return req.attributes.length;
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});
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return this._mount(Protocol.LDAP_REQ_ADD, name, args);
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};
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/**
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* Adds a handler (chain) for the LDAP bind method.
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*
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* Note that this is of the form f(name, [function]) where the second...N
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* arguments can all either be functions or arrays of functions.
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*
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* @param {String} name the DN to mount this handler chain at.
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* @return {Server} this so you can chain calls.
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* @throws {TypeError} on bad input
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*/
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Server.prototype.bind = function(name) {
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var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
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'bind');
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return this._mount(Protocol.LDAP_REQ_BIND, name, args);
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};
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/**
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* Adds a handler (chain) for the LDAP compare method.
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*
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* Note that this is of the form f(name, [function]) where the second...N
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* arguments can all either be functions or arrays of functions.
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*
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* @param {String} name the DN to mount this handler chain at.
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* @return {Server} this so you can chain calls.
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* @throws {TypeError} on bad input
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*/
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Server.prototype.compare = function(name) {
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var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
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'compare',
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function(req, res) {
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return req.attribute;
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},
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function(req, res) {
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return req.value;
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});
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return this._mount(Protocol.LDAP_REQ_COMPARE, name, args);
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};
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/**
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* Adds a handler (chain) for the LDAP delete method.
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*
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* Note that this is of the form f(name, [function]) where the second...N
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* arguments can all either be functions or arrays of functions.
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*
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* @param {String} name the DN to mount this handler chain at.
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* @return {Server} this so you can chain calls.
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* @throws {TypeError} on bad input
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*/
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Server.prototype.del = function(name) {
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var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
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'delete');
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return this._mount(Protocol.LDAP_REQ_DELETE, name, args);
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};
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/**
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* Adds a handler (chain) for the LDAP exop method.
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*
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* Note that this is of the form f(name, [function]) where the second...N
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* arguments can all either be functions or arrays of functions.
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*
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* @param {String} name OID to assign this handler chain to.
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* @return {Server} this so you can chain calls.
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* @throws {TypeError} on bad input.
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*/
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Server.prototype.exop = function(name) {
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var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
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'exop',
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function(req, res) {
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return req.name;
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},
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function(req, res) {
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return req.value;
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});
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return this._mount(Protocol.LDAP_REQ_EXTENSION, name, args, true);
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};
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/**
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* Adds a handler (chain) for the LDAP modify method.
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*
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* Note that this is of the form f(name, [function]) where the second...N
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* arguments can all either be functions or arrays of functions.
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*
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* @param {String} name the DN to mount this handler chain at.
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* @return {Server} this so you can chain calls.
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* @throws {TypeError} on bad input
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*/
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Server.prototype.modify = function(name) {
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var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
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'modify',
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function(req, res) {
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return req.changes.length;
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});
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return this._mount(Protocol.LDAP_REQ_MODIFY, name, args);
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};
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/**
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* Adds a handler (chain) for the LDAP modifyDN method.
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|
*
|
|
* Note that this is of the form f(name, [function]) where the second...N
|
|
* arguments can all either be functions or arrays of functions.
|
|
*
|
|
* @param {String} name the DN to mount this handler chain at.
|
|
* @return {Server} this so you can chain calls.
|
|
* @throws {TypeError} on bad input
|
|
*/
|
|
Server.prototype.modifyDN = function(name) {
|
|
var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
|
|
'modifyDN',
|
|
function(req, res) {
|
|
return req.newRdn.toString();
|
|
},
|
|
function(req, res) {
|
|
return (req.newSuperior ?
|
|
req.newSuperior.toString() : '');
|
|
});
|
|
|
|
return this._mount(Protocol.LDAP_REQ_MODRDN, name, args);
|
|
};
|
|
|
|
|
|
/**
|
|
* Adds a handler (chain) for the LDAP search method.
|
|
*
|
|
* Note that this is of the form f(name, [function]) where the second...N
|
|
* arguments can all either be functions or arrays of functions.
|
|
*
|
|
* @param {String} name the DN to mount this handler chain at.
|
|
* @return {Server} this so you can chain calls.
|
|
* @throws {TypeError} on bad input
|
|
*/
|
|
Server.prototype.search = function(name) {
|
|
var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
|
|
'search',
|
|
function(req, res) {
|
|
return req.scope;
|
|
},
|
|
function(req, res) {
|
|
return req.filter.toString();
|
|
});
|
|
|
|
return this._mount(Protocol.LDAP_REQ_SEARCH, name, args);
|
|
};
|
|
|
|
|
|
/**
|
|
* Adds a handler (chain) for the LDAP unbind method.
|
|
*
|
|
* This method is different than the others and takes no mount point, as unbind
|
|
* is a connection-wide operation, not constrianed to part of the DIT.
|
|
*
|
|
* @return {Server} this so you can chain calls.
|
|
* @throws {TypeError} on bad input
|
|
*/
|
|
Server.prototype.unbind = function() {
|
|
var args = getArgumentsWithDTrace(Array.prototype.slice.call(arguments, 1),
|
|
'unbind');
|
|
|
|
return this._mount(Protocol.LDAP_REQ_UNBIND, 'unbind', args, true);
|
|
};
|
|
|
|
|
|
Server.prototype.after = function() {
|
|
if (!this._postChain)
|
|
this._postChain = [];
|
|
|
|
var self = this;
|
|
mergeFunctionArgs(arguments).forEach(function(h) {
|
|
self._postChain.push(h);
|
|
});
|
|
};
|
|
|
|
// All these just reexpose the requisite net.Server APIs
|
|
Server.prototype.listen = function(port, host, callback) {
|
|
if (!port)
|
|
throw new TypeError('port (number) required');
|
|
|
|
if (typeof(host) === 'function') {
|
|
callback = host;
|
|
host = '0.0.0.0';
|
|
}
|
|
var self = this;
|
|
|
|
function _callback() {
|
|
if (typeof(port) === 'number') {
|
|
self.host = host;
|
|
self.port = port;
|
|
} else {
|
|
self.host = port;
|
|
self.port = self.server.fd;
|
|
}
|
|
|
|
if (typeof(callback) === 'function')
|
|
return callback();
|
|
}
|
|
|
|
if (typeof(port) === 'number') {
|
|
return this.server.listen(port, host, _callback);
|
|
} else {
|
|
return this.server.listen(port, _callback);
|
|
}
|
|
};
|
|
Server.prototype.listenFD = function(fd) {
|
|
self.host = 'unix-domain-socket';
|
|
self.port = fd;
|
|
return this.server.listenFD(fd);
|
|
};
|
|
Server.prototype.close = function() {
|
|
return this.server.close();
|
|
};
|
|
Server.prototype.address = function() {
|
|
return this.server.address();
|
|
};
|
|
|
|
|
|
Server.prototype._getRoute = function(_dn, backend) {
|
|
assert.ok(dn);
|
|
|
|
if (!backend)
|
|
backend = this;
|
|
|
|
var name;
|
|
if (_dn instanceof dn.DN) {
|
|
name = _dn.toString();
|
|
} else {
|
|
name = _dn;
|
|
}
|
|
|
|
if (!this.routes[name]) {
|
|
this.routes[name] = {};
|
|
this.routes[name].backend = backend;
|
|
this.routes[name].dn = _dn;
|
|
}
|
|
|
|
return this.routes[name];
|
|
};
|
|
|
|
|
|
Server.prototype._getHandlerChain = function(req) {
|
|
assert.ok(req);
|
|
|
|
// check anonymous bind
|
|
if (req.protocolOp === Protocol.LDAP_REQ_BIND &&
|
|
req.dn.toString() === '' &&
|
|
req.credentials === '') {
|
|
return {
|
|
backend: self,
|
|
handlers: [defaultAnonymousBindHandler]
|
|
};
|
|
}
|
|
|
|
var op = '0x' + req.protocolOp.toString(16);
|
|
|
|
var self = this;
|
|
var routes = this.routes;
|
|
for (var r in routes) {
|
|
if (routes.hasOwnProperty(r)) {
|
|
var route = routes[r];
|
|
// Special cases are exops and unbinds, handle those first.
|
|
if (req.protocolOp === Protocol.LDAP_REQ_EXTENSION) {
|
|
if (r !== req.requestName)
|
|
continue;
|
|
|
|
return {
|
|
backend: routes.backend,
|
|
handlers: route[op] || [noExOpHandler]
|
|
};
|
|
} else if (req.protocolOp === Protocol.LDAP_REQ_UNBIND) {
|
|
function getUnbindChain() {
|
|
if (routes['unbind'] && routes['unbind'][op])
|
|
return routes['unbind'][op];
|
|
|
|
self.log.debug('%s unbind request %j', req.logId, req.json);
|
|
return [defaultUnbindHandler];
|
|
}
|
|
|
|
return {
|
|
backend: routes['unbind'] ? routes['unbind'].backend : self,
|
|
handlers: getUnbindChain()
|
|
};
|
|
}
|
|
|
|
if (!route[op])
|
|
continue;
|
|
|
|
// Otherwise, match via DN rules
|
|
assert.ok(req.dn);
|
|
assert.ok(route.dn);
|
|
if (r !== req.dn.toString() && (!route.dn.parentOf(req.dn)))
|
|
continue;
|
|
|
|
// We should be good to go.
|
|
req.suffix = route.dn;
|
|
return {
|
|
backend: route.backend,
|
|
handlers: route[op] || [defaultHandler]
|
|
};
|
|
}
|
|
}
|
|
|
|
// We're here, so nothing matched.
|
|
return {
|
|
backend: self,
|
|
handlers: [(req.protocolOp !== Protocol.LDAP_REQ_EXTENSION ?
|
|
noSuffixHandler : noExOpHandler)]
|
|
};
|
|
};
|
|
|
|
|
|
Server.prototype._mount = function(op, name, argv, notDN) {
|
|
assert.ok(op);
|
|
assert.ok(name !== undefined);
|
|
assert.ok(argv);
|
|
|
|
if (typeof(name) !== 'string')
|
|
throw new TypeError('name (string) required');
|
|
if (argv.length < 1)
|
|
throw new Error('at least one handler required');
|
|
|
|
var backend = this;
|
|
var index = 0;
|
|
|
|
if (typeof(argv[0]) === 'object' && !Array.isArray(argv[0])) {
|
|
backend = argv[0];
|
|
index = 1;
|
|
}
|
|
var route = this._getRoute(notDN ? name : dn.parse(name), backend);
|
|
route['0x' + op.toString(16)] = mergeFunctionArgs(argv.slice(index));
|
|
|
|
return this;
|
|
};
|