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connection.js
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"use strict";
// a single connection
var path = require('path');
var config = require('./config');
var logger = require('./logger');
var trans = require('./transaction');
var dns = require('dns');
var plugins = require('./plugins');
var constants = require('./constants');
var rfc1869 = require('./rfc1869');
var fs = require('fs');
var Address = require('./address').Address;
var uuid = require('./utils').uuid;
var outbound = require('./outbound');
var date_to_str = require('./utils').date_to_str;
var indexOfLF = require('./utils').indexOfLF;
var ipaddr = require('ipaddr.js');
var version = JSON.parse(fs.readFileSync(path.join(__dirname, 'package.json'))).version;
var line_regexp = /^([^\n]*\n)/;
var connection = exports;
var states = exports.states = {
STATE_CMD: 1,
STATE_LOOP: 2,
STATE_DATA: 3,
STATE_PAUSE: 4,
STATE_PAUSE_SMTP: 5,
STATE_PAUSE_DATA: 6,
STATE_DISCONNECTING: 99,
STATE_DISCONNECTED: 100,
};
// copy logger methods into Connection:
for (var key in logger) {
if (key.match(/^log\w/)) {
Connection.prototype[key] = (function (key) {
return function () {
// pass the connection instance to logger
var args = [ this ];
for (var i=0, l=arguments.length; i<l; i++) {
args.push(arguments[i]);
}
logger[key].apply(logger, args);
}
})(key);
}
}
// Load HAProxy hosts into an object for fast lookups
// as this list is checked on every new connection.
var haproxy_hosts = {};
function loadHAProxyHosts() {
var hosts = config.get('haproxy_hosts', 'list', function () {
loadHAProxyHosts();
});
var new_host_list = {};
for (var i=0; i<hosts.length; i++) {
new_host_list[hosts[i]] = 1;
}
haproxy_hosts = new_host_list;
}
loadHAProxyHosts();
function setupClient(self) {
var ip = self.client.remoteAddress;
if (!ip) {
self.logdebug('setupClient got no IP address for this connection!');
self.client.destroy();
return;
}
var local_addr = self.server.address();
if (local_addr && local_addr.address) {
self.local_ip = ipaddr.process(local_addr.address).toString();
self.local_port = local_addr.port;
}
self.remote_ip = ipaddr.process(ip).toString();
self.remote_port = self.client.remotePort;
self.lognotice('connect ip=' + self.remote_ip + ' port=' + self.remote_port +
' local_ip=' + self.local_ip + ' local_port=' + self.local_port);
self.client.on('end', function() {
if (self.state >= states.STATE_DISCONNECTING) return;
self.remote_close = true;
self.fail('client ' + ((self.remote_host) ? self.remote_host + ' ' : '')
+ '[' + self.remote_ip + '] half closed connection');
});
self.client.on('close', function(has_error) {
if (self.state >= states.STATE_DISCONNECTING) return;
self.remote_close = true;
self.fail('client ' + ((self.remote_host) ? self.remote_host + ' ' : '')
+ '[' + self.remote_ip + '] dropped connection');
});
self.client.on('error', function (err) {
if (self.state >= states.STATE_DISCONNECTING) return;
self.fail('client ' + ((self.remote_host) ? self.remote_host + ' ' : '')
+ '[' + self.remote_ip + '] connection error: ' + err);
});
self.client.on('timeout', function () {
if (self.state >= states.STATE_DISCONNECTING) return;
self.respond(421, 'timeout', function () {
self.fail('client ' + ((self.remote_host) ? self.remote_host + ' ' : '')
+ '[' + self.remote_ip + '] connection timed out');
});
});
self.client.on('data', function (data) {
self.process_data(data);
});
if (haproxy_hosts[self.remote_ip]) {
self.proxy = true;
// Wait for PROXY command
self.proxy_timer = setTimeout(function () {
self.respond(421, 'PROXY timeout', function () {
self.disconnect();
});
}, 30 * 1000);
}
else {
plugins.run_hooks('lookup_rdns', self);
}
}
function Connection(client, server) {
this.client = client;
this.server = server;
this.local_ip = null;
this.local_port = null;
this.remote_ip = null;
this.remote_host = null
this.remote_port = null;
this.remote_info = null;
this.current_data = null;
this.current_line = null;
this.greeting = null;
this.hello_host = null;
this.using_tls = false;
this.state = states.STATE_PAUSE;
this.prev_state = null;
this.loop_code = null;
this.loop_msg = null;
this.uuid = uuid();
this.notes = {};
this.transaction = null;
this.tran_count = 0;
this.capabilities = null;
this.early_talker_delay = config.get('early_talker_delay') || 1000;
this.banner_includes_uuid = config.get('banner_includes_uuid') ? true : false;
this.deny_includes_uuid = config.get('deny_includes_uuid') || null;
this.early_talker = 0;
this.pipelining = 0;
this.relaying = false;
this.esmtp = false;
this.last_response = null;
this.remote_close = false;
this.hooks_to_run = [];
this.start_time = Date.now();
this.last_reject = '';
this.max_bytes = config.get('databytes');
this.totalbytes = 0;
this.rcpt_count = {
accept: 0,
tempfail: 0,
reject: 0,
};
this.msg_count = {
accept: 0,
tempfail: 0,
reject: 0,
};
this.data_post_start = null;
this.proxy = false;
this.proxy_timer = false;
this.max_line_length = config.get('max_line_length') || 512;
this.max_data_line_length = config.get('max_data_line_length') || 992;
setupClient(this);
}
exports.Connection = Connection;
exports.createConnection = function(client, server) {
var s = new Connection(client, server);
return s;
}
Connection.prototype.process_line = function (line) {
var self = this;
if (this.state >= states.STATE_DISCONNECTING) {
if (logger.would_log(logger.LOGPROTOCOL)) {
this.logprotocol("C: (after-disconnect): " + this.current_line + ' state=' + this.state);
}
this.logwarn("data after disconnect from " + this.remote_ip);
return;
}
if (this.state === states.STATE_DATA) {
if (logger.would_log(logger.LOGDATA)) {
this.logdata("C: " + line);
}
this.accumulate_data(line);
return;
}
this.current_line = line.toString('binary').replace(/\r?\n/, '');
if (logger.would_log(logger.LOGPROTOCOL)) {
this.logprotocol("C: " + this.current_line + ' state=' + this.state);
}
// Check for non-ASCII characters
if (/[^\x00-\x7F]/.test(this.current_line)) {
return this.respond(501, 'Syntax error (8-bit characters not allowed)');
}
if (this.state === states.STATE_CMD) {
this.state = states.STATE_PAUSE_SMTP;
var matches = /^([^ ]*)( +(.*))?$/.exec(this.current_line);
if (!matches) {
return plugins.run_hooks('unrecognized_command', this, this.current_line);
}
var method = "cmd_" + matches[1].toLowerCase();
var remaining = matches[3] || '';
if (this[method]) {
try {
this[method](remaining);
}
catch (err) {
if (err.stack) {
var c = this;
c.logerror(method + " failed: " + err);
err.stack.split("\n").forEach(c.logerror);
}
else {
this.logerror(method + " failed: " + err);
}
this.respond(421, "Internal Server Error", function() {
self.disconnect();
});
}
}
else {
// unrecognised command
matches.splice(0,1);
matches.splice(1,1);
plugins.run_hooks('unrecognized_command', this, matches);
}
}
else if (this.state === states.STATE_LOOP) {
// Allow QUIT
if (this.current_line.toUpperCase() === 'QUIT') {
this.cmd_quit();
}
else {
this.respond(this.loop_code, this.loop_msg);
}
}
else {
throw new Error('unknown state ' + this.state);
}
};
Connection.prototype.process_data = function (data) {
if (this.state >= states.STATE_DISCONNECTING) {
this.logwarn("data after disconnect from " + this.remote_ip);
return;
}
if (!this.current_data || !this.current_data.length) {
this.current_data = data;
}
else {
// Data left over in buffer
var buf = Buffer.concat(
[ this.current_data, data ],
(this.current_data.length + data.length)
);
this.current_data = buf;
}
this._process_data();
};
Connection.prototype._process_data = function() {
var self = this;
// We *must* detect disconnected connections here as the state
// only transitions to states.STATE_CMD in the respond function below.
// Otherwise if multiple commands are pipelined and then the
// connection is dropped; we'll end up in the function forever.
if (this.state >= states.STATE_DISCONNECTING) return;
var maxlength;
if (this.state === states.STATE_PAUSE_DATA || this.state === states.STATE_DATA) {
maxlength = this.max_data_line_length;
}
else {
maxlength = this.max_line_length;
}
var offset;
while (this.current_data && ((offset = indexOfLF(this.current_data, maxlength)) !== -1)) {
if (this.state === states.STATE_PAUSE_DATA) {
return;
}
var this_line = this.current_data.slice(0, offset+1);
// Hack: bypass this code to allow HAProxy's PROXY extension
if (this.state === states.STATE_PAUSE && this.proxy && /^PROXY /.test(this_line)) {
if (this.proxy_timer) clearTimeout(this.proxy_timer);
this.state = states.STATE_CMD;
this.current_data = this.current_data.slice(this_line.length);
this.process_line(this_line);
}
// Detect early_talker but allow PIPELINING extension (ESMTP)
else if ((this.state === states.STATE_PAUSE || this.state === states.STATE_PAUSE_SMTP) && !this.esmtp) {
if (!this.early_talker) {
this_line = this_line.toString().replace(/\r?\n/,'');
this.logdebug('[early_talker] state=' + this.state + ' esmtp=' + this.esmtp + ' line="' + this_line + '"');
}
this.early_talker = 1;
var self = this;
// If you talk early, we're going to give you a delay
setTimeout(function() { self._process_data() }, this.early_talker_delay);
break;
}
else if ((this.state === states.STATE_PAUSE || this.state === states.STATE_PAUSE_SMTP) && this.esmtp) {
var valid = true;
var cmd = this_line.toString('ascii').slice(0,4).toUpperCase();
switch (cmd) {
case 'RSET':
case 'MAIL':
case 'SEND':
case 'SOML':
case 'SAML':
case 'RCPT':
// These can be anywhere in the group
break;
default:
// Anything else *MUST* be the last command in the group
if (this_line.length !== this.current_data.length) {
valid = false;
}
break;
}
if (valid) {
// Valid PIPELINING
// We *don't want to process this yet otherwise the
// current_data buffer will be lost. The respond()
// function will call this function again once it
// has reset the state back to states.STATE_CMD and this
// ensures that we only process one command at a
// time.
this.pipelining = 1;
this.logdebug('pipeline: ' + this_line);
}
else {
// Invalid pipeline sequence
// Treat this as early talker
if (!this.early_talker) {
this.logdebug('[early_talker] state=' + this.state + ' esmtp=' + this.esmtp + ' line="' + this_line + '"');
}
this.early_talker = 1;
var self = this;
setTimeout(function() { self._process_data() }, this.early_talker_delay);
}
break;
}
else {
this.current_data = this.current_data.slice(this_line.length);
this.process_line(this_line);
}
}
if (this.current_data && (this.current_data.length > maxlength) && (indexOfLF(this.current_data, maxlength) == -1)) {
if (this.state !== states.STATE_DATA &&
this.state !== states.STATE_PAUSE_DATA)
{
// In command mode, reject:
this.client.pause();
this.current_data = null;
return this.respond(521, "Command line too long", function () {
self.disconnect();
});
}
else {
this.logwarn('DATA line length (' + this.current_data.length + ') exceeds limit of ' + maxlength + ' bytes');
this.transaction.notes.data_line_length_exceeded = true;
var b = Buffer.concat([
this.current_data.slice(0, maxlength - 2),
new Buffer("\r\n ", 'utf8'),
this.current_data.slice(maxlength - 2)
], this.current_data.length + 3);
this.current_data = b;
return this._process_data();
}
}
};
Connection.prototype.respond = function(code, msg, func) {
var uuid = '';
var messages;
if (this.state === states.STATE_DISCONNECTED) {
if (func) func();
return;
}
// Check to see if DSN object was passed in
if (typeof msg === 'object' && msg.constructor.name === 'DSN') {
// Override
code = msg.code;
msg = msg.reply;
}
if (!(Array.isArray(msg))) {
// msg not an array, make it so:
messages = msg.toString().split(/\n/).filter(function (msg) { return /\S/.test(msg) });
} else {
// copy
messages = msg.slice().filter(function (msg) { return /\S/.test(msg) });
}
if (code >= 400) {
this.last_reject = code + ' ' + messages.join(' ');
if (this.deny_includes_uuid) {
uuid = (this.transaction || this).uuid;
if (this.deny_includes_uuid > 1) {
uuid = uuid.substr(0, this.deny_includes_uuid);
}
}
}
var mess;
var buf = '';
while (mess = messages.shift()) {
var line = code + (messages.length ? "-" : " ") +
(uuid ? '[' + uuid + '] ' : '' ) + mess;
this.logprotocol("S: " + line);
buf = buf + line + "\r\n";
}
try {
this.client.write(buf);
}
catch (err) {
return this.fail("Writing response: " + buf + " failed: " + err);
}
// Store the last response
this.last_response = buf;
// Don't change loop state
if (this.state !== states.STATE_LOOP) {
this.state = states.STATE_CMD;
}
// Run optional closure before handling and further commands
if (func) func();
// Process any buffered commands (PIPELINING)
this._process_data();
};
Connection.prototype.fail = function (err) {
this.logwarn(err);
this.hooks_to_run = [];
this.disconnect();
}
Connection.prototype.disconnect = function() {
if (this.state >= states.STATE_DISCONNECTING) return;
var self = this;
self.state = states.STATE_DISCONNECTING;
this.reset_transaction(function () {
plugins.run_hooks('disconnect', self);
});
};
Connection.prototype.disconnect_respond = function () {
var logdetail = [
'ip=' + this.remote_ip,
'rdns="' + ((this.remote_host) ? this.remote_host : '') + '"',
'helo="' + ((this.hello_host) ? this.hello_host : '') + '"',
'relay=' + (this.relaying ? 'Y' : 'N'),
'early=' + (this.early_talker ? 'Y' : 'N'),
'esmtp=' + (this.esmtp ? 'Y' : 'N'),
'tls=' + (this.using_tls ? 'Y' : 'N'),
'pipe=' + (this.pipelining ? 'Y' : 'N'),
'txns=' + this.tran_count,
'rcpts=' + this.rcpt_count.accept + '/' +
this.rcpt_count.tempfail + '/' +
this.rcpt_count.reject,
'msgs=' + this.msg_count.accept + '/' +
this.msg_count.tempfail + '/' +
this.msg_count.reject,
'bytes=' + this.totalbytes,
'lr="' + ((this.last_reject) ? this.last_reject : '') + '"',
'time=' + (Date.now() - this.start_time)/1000,
];
this.lognotice('disconnect ' + logdetail.join(' '));
this.state = states.STATE_DISCONNECTED;
this.client.end();
};
Connection.prototype.get_capabilities = function() {
var capabilities = []
return capabilities;
};
Connection.prototype.tran_uuid = function () {
this.tran_count++;
return this.uuid + '.' + this.tran_count;
}
Connection.prototype.reset_transaction = function(cb) {
if (this.transaction && this.transaction.resetting === false) {
this.transaction.resetting = true;
plugins.run_hooks('reset_transaction', this, cb);
}
else {
this.transaction = null;
if (cb) cb();
}
};
Connection.prototype.reset_transaction_respond = function (retval, msg, cb) {
if (this.transaction) {
this.transaction.message_stream.destroy();
this.transaction = null;
}
if (cb) cb();
};
Connection.prototype.init_transaction = function(cb) {
var self = this;
this.reset_transaction(function () {
self.transaction = trans.createTransaction(self.tran_uuid());
// Catch any errors from the message_stream
self.transaction.message_stream.on('error', function (err) {
self.logcrit('message_stream error: ' + err.message);
self.respond('421', 'Internal Server Error', function () {
self.disconnect();
});
});
if (cb) cb();
});
}
Connection.prototype.loop_respond = function (code, msg) {
if (this.state >= states.STATE_DISCONNECTING) return;
this.state = states.STATE_LOOP;
this.loop_code = code;
this.loop_msg = msg;
this.respond(code, msg);
}
Connection.prototype.pause = function () {
var self = this;
if (self.state >= states.STATE_DISCONNECTING) return;
self.client.pause();
if (self.state != states.STATE_PAUSE_DATA) self.prev_state = self.state;
self.state = states.STATE_PAUSE_DATA;
}
Connection.prototype.resume = function () {
var self = this;
if (self.state >= states.STATE_DISCONNECTING) return;
self.client.resume();
if (self.prev_state) {
self.state = self.prev_state;
self.prev_state = null;
}
process.nextTick(function () { self._process_data() });
}
/////////////////////////////////////////////////////////////////////////////
// SMTP Responses
Connection.prototype.lookup_rdns_respond = function (retval, msg) {
var self = this;
switch(retval) {
case constants.ok:
this.remote_host = msg || 'Unknown';
this.remote_info = this.remote_info || this.remote_host;
plugins.run_hooks('connect', this);
break;
case constants.deny:
this.loop_respond(554, msg || "rDNS Lookup Failed");
break;
case constants.denydisconnect:
case constants.disconnect:
this.respond(554, msg || "rDNS Lookup Failed", function () {
self.disconnect();
});
break;
case constants.denysoft:
this.loop_respond(421, msg || "rDNS Temporary Failure");
break;
case constants.denysoftdisconnect:
this.respond(421, msg || "rDNS Temporary Failure", function () {
self.disconnect();
});
break;
default:
var self = this;
dns.reverse(this.remote_ip, function(err, domains) {
self.rdns_response(err, domains);
})
}
}
Connection.prototype.rdns_response = function (err, domains) {
if (err) {
switch (err.code) {
case dns.NXDOMAIN: this.remote_host = 'NXDOMAIN'; break;
default: this.remote_host = 'DNSERROR'; break;
}
}
else {
this.remote_host = domains[0] || 'Unknown';
}
this.remote_info = this.remote_info || this.remote_host;
plugins.run_hooks('connect', this);
}
Connection.prototype.unrecognized_command_respond = function(retval, msg) {
var self = this;
switch(retval) {
case constants.ok:
// response already sent, cool...
break;
case constants.next_hook:
plugins.run_hooks(msg, this);
break;
case constants.deny:
this.respond(500, msg || "Unrecognized command");
break;
case constants.denydisconnect:
this.respond(521, msg || "Unrecognized command", function () {
self.disconnect();
});
break;
default:
this.respond(500, msg || "Unrecognized command");
}
};
Connection.prototype.connect_respond = function(retval, msg) {
var self = this;
// RFC 5321 Section 4.3.2 states that the only valid SMTP codes here are:
// 220 = Service ready
// 554 = Transaction failed (no SMTP service here)
// 421 = Service shutting down and closing transmission channel
switch (retval) {
case constants.deny:
this.loop_respond(554, msg || "Your mail is not welcome here");
break;
case constants.denydisconnect:
case constants.disconnect:
this.respond(554, msg || "Your mail is not welcome here", function() {
self.disconnect();
});
break;
case constants.denysoft:
this.loop_respond(421, msg || "Come back later");
break;
case constants.denysoftdisconnect:
this.respond(421, msg || "Come back later", function() {
self.disconnect();
});
break;
default:
var greeting = config.get('smtpgreeting', 'list');
if (greeting.length) {
// RFC5321 section 4.2
// Hostname/domain should appear after the 220
greeting[0] = config.get('me') + ' ESMTP ' + greeting[0];
if (this.banner_includes_uuid) {
greeting[0] += ' (' + this.uuid + ')';
}
}
else {
greeting = config.get('me') + " ESMTP Haraka " + version + " ready";
if (this.banner_includes_uuid) {
greeting += ' (' + this.uuid + ')';
}
}
this.respond(220, msg || greeting);
}
};
Connection.prototype.helo_respond = function(retval, msg) {
var self = this;
switch (retval) {
case constants.deny:
this.respond(550, msg || "HELO denied", function() {
self.greeting = null;
self.hello_host = null;
});
break;
case constants.denydisconnect:
this.respond(550, msg || "HELO denied", function() {
self.disconnect();
});
break;
case constants.denysoft:
this.respond(450, msg || "HELO denied", function() {
self.greeting = null;
self.hello_host = null;
});
break;
case constants.denysoftdisconnect:
this.respond(450, msg || "HELO denied", function() {
self.disconnect();
});
break;
default:
// RFC5321 section 4.1.1.1
// Hostname/domain should appear after 250
this.respond(250, config.get('me') + " Hello " +
((this.remote_host && this.remote_host !== 'DNSERROR'
&& this.remote_host !== 'NXDOMAIN') ? this.remote_host + ' ' : '')
+ "[" + this.remote_ip + "]"
+ ", Haraka is at your service.");
}
};
Connection.prototype.ehlo_respond = function(retval, msg) {
var self = this;
switch (retval) {
case constants.deny:
this.respond(550, msg || "EHLO denied", function() {
self.greeting = null;
self.hello_host = null;
});
break;
case constants.denydisconnect:
this.respond(550, msg || "EHLO denied", function() {
self.disconnect();
});
break;
case constants.denysoft:
this.respond(450, msg || "EHLO denied", function() {
self.greeting = null;
self.hello_host = null;
});
break;
case constants.denysoftdisconnect:
this.respond(450, msg || "EHLO denied", function () {
self.disconnect();
});
break;
default:
// RFC5321 section 4.1.1.1
// Hostname/domain should appear after 250
var response = [config.get('me') + " Hello " +
((this.remote_host && this.remote_host !== 'DNSERROR' &&
this.remote_host !== 'NXDOMAIN') ? this.remote_host + ' ' : '')
+ "[" + this.remote_ip + "]"
+ ", Haraka is at your service.",
"PIPELINING",
"8BITMIME",
];
var databytes = parseInt(config.get('databytes')) || 0;
response.push("SIZE " + databytes);
this.capabilities = response;
plugins.run_hooks('capabilities', this);
this.esmtp = true;
}
};
Connection.prototype.capabilities_respond = function (retval, msg) {
this.respond(250, this.capabilities);
};
Connection.prototype.quit_respond = function(retval, msg) {
var self = this;
this.respond(221, msg || config.get('me') + " closing connection. Have a jolly good day.", function() {
self.disconnect();
});
};
Connection.prototype.vrfy_respond = function(retval, msg) {
var self = this;
switch (retval) {
case constants.deny:
this.respond(550, msg || "Access Denied", function() {
self.reset_transaction();
});
break;
case constants.denydisconnect:
this.respond(550, msg || "Access Denied", function() {
self.disconnect();
});
break;
case constants.denysoft:
this.respond(450, msg || "Lookup Failed", function() {
self.reset_transaction();
});
break;
case constants.denysoftdisconnect:
this.respond(450, msg || "Lookup Failed", function() {
self.disconnect();
});
break;
case constants.ok:
this.respond(250, msg || "User OK");
break;
default:
this.respond(252, "Just try sending a mail and we'll see how it turns out...");
}
};
Connection.prototype.noop_respond = function(retval, msg) {
var self = this;
switch (retval) {
case constants.deny:
this.respond(500, msg || "Stop wasting my time");
break;
case constants.denydisconnect:
this.respond(500, msg || "Stop wasting my time", function() {
self.disconnect();
});
break;
default:
this.respond(250, "OK");
}
};
Connection.prototype.rset_respond = function(retval, msg) {
// We ignore any plugin responses
var self = this;
this.respond(250, "OK", function() {
self.reset_transaction();
});
}
Connection.prototype.mail_respond = function(retval, msg) {
var self = this;
var sender = this.transaction.mail_from;
var dmsg = "sender " + sender.format();
this.lognotice(dmsg + ' ' + [
'code=' + constants.translate(retval),
'msg="' + (msg || '') + '"',
].join(' '));
switch (retval) {
case constants.deny:
this.respond(550, msg || dmsg + " denied", function() {
self.reset_transaction();
});
break;
case constants.denydisconnect:
this.respond(550, msg || dmsg + " denied", function() {
self.disconnect();
});
break;
case constants.denysoft:
this.respond(450, msg || dmsg + " denied", function() {
self.reset_transaction();
});
break;
case constants.denysoftdisconnect:
this.respond(450, msg || dmsg + " denied", function() {
self.disconnect();
});
break;
default:
this.respond(250, msg || dmsg + " OK");
}
};
Connection.prototype.rcpt_ok_respond = function (retval, msg) {
var self = this;
var rcpt = this.transaction.rcpt_to[this.transaction.rcpt_to.length - 1];
var dmsg = "recipient " + rcpt.format();
this.lognotice(dmsg + ' ' + [
'code=' + constants.translate(retval),
'msg="' + (msg || '') + '"',
'sender="' + this.transaction.mail_from.address() + '"',
].join(' '));
switch (retval) {
case constants.deny:
this.respond(550, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.reject++;
self.rcpt_count.reject++;
self.transaction.rcpt_to.pop();
});
break;
case constants.denydisconnect:
this.respond(550, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.reject++;
self.rcpt_count.reject++;
self.disconnect();
});
break;
case constants.denysoft:
this.respond(450, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.tempfail++;
self.rcpt_count.tempfail++;
self.transaction.rcpt_to.pop();
});
break;
case constants.denysoftdisconnect:
this.respond(450, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.tempfail++;
self.rcpt_count.tempfail++;
self.disconnect();
});
break;
default:
this.respond(250, msg || dmsg + " OK", function() {
self.rcpt_count.accept++;
self.transaction.rcpt_count.accept++;
});
}
}
Connection.prototype.rcpt_respond = function(retval, msg) {
if (retval === constants.cont && this.relaying) {
retval = constants.ok;
}
var self = this;
var rcpt = this.transaction.rcpt_to[this.transaction.rcpt_to.length - 1];
var dmsg = "recipient " + rcpt.format();
if (retval !== constants.ok) {
this.lognotice(dmsg + ' ' + [
'code=' + constants.translate(retval),
'msg="' + (msg || '') + '"',
'sender="' + this.transaction.mail_from.address() + '"',
].join(' '));
}
switch (retval) {
case constants.deny:
this.respond(550, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.reject++;
self.rcpt_count.reject++;
self.transaction.rcpt_to.pop();
});
break;
case constants.denydisconnect:
this.respond(550, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.reject++;
self.rcpt_count.reject++;
self.disconnect();
});
break;
case constants.denysoft:
this.respond(450, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.tempfail++;
self.rcpt_count.tempfail++;
self.transaction.rcpt_to.pop();
});
break;
case constants.denysoftdisconnect:
this.respond(450, msg || dmsg + " denied", function() {
self.transaction.rcpt_count.tempfail++;
self.rcpt_count.tempfail++;
self.disconnect();
});
break;
case constants.ok:
plugins.run_hooks('rcpt_ok', this, rcpt);
break;
default:
if (retval !== constants.cont) {
this.logalert("No plugin determined if relaying was allowed");
}
this.respond(550, "I cannot deliver mail for " + rcpt.format(), function() {
self.transaction.rcpt_count.reject++;
self.rcpt_count.reject++;
self.transaction.rcpt_to.pop();
});
}
};
/////////////////////////////////////////////////////////////////////////////
// HAProxy support
Connection.prototype.cmd_proxy = function (line) {
if (!this.proxy) {
this.respond(421, 'PROXY not allowed from ' + this.remote_ip);
return this.disconnect();
}
var match;
if (!(match = /(TCP4|TCP6|UNKNOWN) (\S+) (\S+) (\d+) (\d+)$/.exec(line))) {
this.respond(421, 'Invalid PROXY format');
return this.disconnect();
}
var proto = match[1];
var src_ip = match[2];