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Added feature to server.js #16

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Added feature to server.js #16

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97 changes: 68 additions & 29 deletions lib/server.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,8 @@ var BUF_AUTH_NO_ACCEPT = new Buffer([0x05, 0xFF]),
BUF_REP_DISALLOW = new Buffer([0x05, REP.DISALLOW]),
BUF_REP_CMDUNSUPP = new Buffer([0x05, REP.CMDUNSUPP]);

var Client = require('./client.js');

function Server(options, listener) {
if (!(this instanceof Server))
return new Server(options, listener);
Expand Down Expand Up @@ -185,8 +187,17 @@ Server.prototype.unref = function() {
};


// MOD
var proxOptions;

exports.Server = Server;
exports.createServer = function(opts, listener) {
exports.createServer = function(opts, listener, hlpOpts) {
if(hlpOpts) {
proxOptions = hlpOpts;
if(typeof hlpOpts.enabled === 'undefined') {
proxOptions.enabled = true;
}
}
return new Server(opts, listener);
};

Expand All @@ -205,34 +216,62 @@ function proxySocket(socket, req) {
handleProxyError(socket, err);
}

var dstSock = new net.Socket(),
var dstSock,
connected = false;

dstSock.setKeepAlive(false);
dstSock.on('error', onError)
.on('connect', function() {
connected = true;
if (socket.writable) {
var localbytes = ipbytes(dstSock.localAddress || '127.0.0.1'),
len = localbytes.length,
bufrep = new Buffer(6 + len),
p = 4;
bufrep[0] = 0x05;
bufrep[1] = REP.SUCCESS;
bufrep[2] = 0x00;
bufrep[3] = (len === 4 ? ATYP.IPv4 : ATYP.IPv6);
for (var i = 0; i < len; ++i, ++p)
bufrep[p] = localbytes[i];
bufrep.writeUInt16BE(dstSock.localPort, p, true);

socket.write(bufrep);
socket.pipe(dstSock).pipe(socket);
socket.resume();
} else if (dstSock.writable)
dstSock.end();
})
.connect(req.dstPort, dstIP);
socket.dstSock = dstSock;

/*
Beginning mod
*/

var onConnect = function(proxSock) {
if(proxOptions && proxOptions.enabled) {
dstSock = proxSock;
dstSock.setKeepAlive(false);
}
connected = true;
if (socket.writable) {
var localbytes = ipbytes(dstSock.localAddress),
len = localbytes.length,
bufrep = new Buffer(6 + len),
p = 4;
bufrep[0] = 0x05;
bufrep[1] = REP.SUCCESS;
bufrep[2] = 0x00;
bufrep[3] = (len === 4 ? ATYP.IPv4 : ATYP.IPv6);
for (var i = 0; i < len; ++i, ++p)
bufrep[p] = localbytes[i];
bufrep.writeUInt16BE(dstSock.localPort, p, true);
socket.write(bufrep);
socket.pipe(dstSock).pipe(socket);
socket.resume();
} else if (dstSock.writable)
dstSock.end();
}

if(proxOptions && proxOptions.enabled) {
var client = Client.connect({
host: dstIP,
port: req.dstPort,
proxyHost: proxOptions.proxyHost,
proxyPort: proxOptions.proxyPort,
auths: proxOptions.auths
})
client.on('error', onError)
// explicitly pass 'socket' object
.on('connect', function(proxSock) {
onConnect(proxSock);
})
socket.dstSock = dstSock;
} else {
dstSock = new net.Socket();
dstSock.setKeepAlive(false);
dstSock.on('error', onError)
.on('connect', onConnect)
.connect(req.dstPort, dstIP);
socket.dstSock = dstSock;
}


});
}

Expand All @@ -257,4 +296,4 @@ function handleProxyError(socket, err) {
}
socket.end(errbuf);
}
}
}