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telebit.js
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demo works

This commit is contained in:
AJ ONeal 2016-09-22 16:18:35 -06:00
parent 88be06c872
commit 9c7e3d1adf
5 changed files with 65 additions and 293 deletions
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97
client.js
View File

@ -6,26 +6,34 @@ var sni = require('sni');
// TODO ask oauth3.org where to connect
// TODO reconnect on disconnect
function pack(address, data) {
var version = 1;
var header = /*servername + ',' +*/address.family + ',' + address.address + ',' + address.port + ',' + data.byteLength;
var meta = [ 255 - version, header.length ];
var buf = Buffer.alloc(meta.length + header.length + data.byteLength);
buf.write(meta[0], 0);
buf.write(meta[1], 1);
buf.write(header, 2);
buf.write(data, 2 + header.length);
return buf;
}
// Assumption: will not get next tcp packet unless previous packet succeeded
//var services = { 'ssh': 22, 'http': 80, 'https': 443 };
var services = { 'ssh': 22, 'http': 4080, 'https': 8443 };
var tunneler = net.connect({ port: 5443 , host: 'pokemap.hellabit.com' }, function () {
var token = jwt.sign({ name: 'pokemap.hellabit.com' }, 'shhhhh');
var clients = {};
var hostname = 'aj.daplie.me'; // 'pokemap.hellabit.com'
function addrToId(address) {
return address.family + ',' + address.address + ',' + address.port;
}
/*
function socketToAddr(socket) {
return { family: socket.remoteFamily, address: socket.remoteAddress, port: socket.remotePort };
}
function socketToId(socket) {
return addrToId(socketToAddr(socket));
}
*/
var tunneler = net.connect({ port: 5443 , host: hostname }, function () {
var token = jwt.sign({ name: hostname }, 'shhhhh');
var localclients = {};
setInterval(function () {
console.log('');
console.log('localclients.length:', Object.keys(localclients).length);
console.log('');
}, 5000);
tunneler.write(token);
@ -34,15 +42,30 @@ var tunneler = net.connect({ port: 5443 , host: 'pokemap.hellabit.com' }, functi
// a place to store data
// file management
// Synergy Teamwork Paradigm = Jabberwocky
var machine = require('./machine.js').create();
machine.onMessage = function (opts) {
var id = opts.family + ',' + opts.address + ',' + opts.port;
var pack = require('tunnel-packer').pack;
function onMessage(opts) {
var id = addrToId(opts);
var service = 'https';
var port = services[service];
var client;
var lclient;
if (clients[id]) {
clients[id].write(opts.data);
if (opts.data.byteLength < 20) {
if ('|__ERROR__|' === opts.data.toString('utf8')
|| '|__END__|' === opts.data.toString('utf8')) {
console.log("end '" + opts.address + "'");
if (localclients[id]) {
localclients[id].end();
delete localclients[id];
}
return;
}
}
if (localclients[id]) {
console.log("received data from '" + opts.address + "'", opts.data.byteLength);
localclients[id].write(opts.data);
return;
}
@ -50,30 +73,36 @@ var tunneler = net.connect({ port: 5443 , host: 'pokemap.hellabit.com' }, functi
if (!servername) {
console.warn("no servername found for '" + id + "'");
tunneler.write(pack(opts, '|__ERROR__|'));
tunneler.write(pack(opts, Buffer.from('|__ERROR__|')));
return;
}
console.log("servername: '" + servername + "'");
clients = clients[id] = net.createConnect({ port: port, host: servername }, function () {
client.on('data', function (chunk) {
console.error('client Data');
lclient = localclients[id] = net.createConnection({ port: port, host: '127.0.0.1' }, function () {
lclient.on('data', function (chunk) {
console.log("client '" + opts.address + "' sent ", chunk.byteLength, "bytes");
tunneler.write(pack(opts, chunk));
});
client.on('error', function (err) {
lclient.on('error', function (err) {
console.error('client Error');
console.error(err);
tunneler.write(pack(opts, '|__ERROR__|'));
delete localclients[id];
tunneler.write(pack(opts, Buffer.from('|__ERROR__|')));
});
client.on('end', function () {
console.error('client End');
tunneler.write(pack(opts, '|__END__|'));
lclient.on('end', function () {
console.log('client End');
delete localclients[id];
tunneler.write(pack(opts, Buffer.from('|__END__|')));
});
client.write(opts.data);
console.log('received data', opts.data.byteLength);
lclient.write(opts.data);
});
};
}
var machine = require('tunnel-packer').create({ onMessage: onMessage });
tunneler.on('data', machine.fns.addChunk);

166
machine.js
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@ -1,166 +0,0 @@
'use strict';
module.exports.create = function () {
var machine = {};
machine._version = 1;
machine.state = 0;
machine.states = { 0: 'version', 1: 'headerLength', 2: 'header', 3: 'data'/*, 4: 'error'*/ };
machine.states_length = Object.keys(machine.states).length;
machine.chunkIndex = 0;
machine.fns = {};
function debug(chunk, i, len) {
i = i || 0;
len = len || chunk.length - i;
console.log(chunk.slice(i, len)[0]);
console.log(chunk);
console.log('state:', machine.states[machine.state]);
console.log('statei:', machine.state);
console.log('index:', machine.chunkIndex);
}
machine.fns.version = function (chunk) {
//console.log('');
//console.log('[version]');
if ((255 - machine._version) !== chunk[machine.chunkIndex]) {
console.error("not v" + machine._version + " (or data is corrupt)");
// no idea how to fix this yet
}
machine.chunkIndex += 1;
return true;
};
machine.headerLen = 0;
machine.fns.headerLength = function (chunk) {
//console.log('');
//console.log('[headerLength]');
machine.headerLen = chunk[machine.chunkIndex];
machine.chunkIndex += 1;
return true;
};
machine.buf = null;
machine.bufIndex = 0;
//var buf = Buffer.alloc(4096);
machine.fns.header = function (chunk) {
//console.log('');
//console.log('[header]');
var curSize = machine.bufIndex + (chunk.length - machine.chunkIndex);
var partLen = 0;
var str = '';
var part;
if (curSize < machine.headerLen) {
// I still don't have the whole header,
// so just create a large enough buffer,
// write these bits, and wait for the next chunk.
if (!machine.buf) {
machine.buf = Buffer.alloc(machine.headerLen);
}
// partLen should be no more than the available size
partLen = Math.min(machine.headerLen - machine.bufIndex, chunk.length - machine.chunkIndex);
part = chunk.slice(machine.chunkIndex, machine.chunkIndex + partLen);
chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex, machine.chunkIndex + partLen);
machine.chunkIndex += partLen; // this MUST be chunk.length
machine.bufIndex += partLen;
return false;
}
else {
// it's now ready to discover the whole header
if (machine.buf) {
str += machine.buf.slice(0, machine.bufIndex).toString();
}
partLen = machine.headerLen - str.length;
part = chunk.slice(machine.chunkIndex, machine.chunkIndex + partLen);
str += part.toString();
machine.chunkIndex += partLen;
machine.buf = null; // back to null
machine.bufIndex = 0; // back to 0
machine._headers = str.split(/,/g);
machine.family = machine._headers[0];
machine.address = machine._headers[1];
machine.port = machine._headers[2];
machine.bodyLen = parseInt(machine._headers[3], 10) || -1;
return true;
}
};
machine.fns.data = function (chunk) {
//console.log('');
//console.log('[data]');
var curSize = machine.bufIndex + (chunk.length - machine.chunkIndex);
//console.log('curSize:', curSize);
//console.log('bodyLen:', machine.bodyLen, typeof machine.bodyLen);
var partLen = 0;
partLen = Math.min(machine.bodyLen - machine.bufIndex, chunk.length - machine.chunkIndex);
if (curSize < machine.bodyLen) {
//console.log('curSize < bodyLen');
// I still don't have the whole header,
// so just create a large enough buffer,
// write these bits, and wait for the next chunk.
if (!machine.buf) {
machine.buf = Buffer.alloc(machine.bodyLen);
}
chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex, machine.chunkIndex + partLen);
machine.chunkIndex += partLen; // this MUST be chunk.length
machine.bufIndex += partLen;
return false;
}
if (machine.bufIndex > 0) {
// the completing remainder of the body is in the current slice
chunk.copy(machine.buf, machine.bufIndex, machine.chunkIndex, machine.chunkIndex + partLen);
}
else {
// the whole body is in the current slice
machine.buf = chunk.slice(machine.chunkIndex, machine.chunkIndex + partLen);
}
machine.bufIndex += partLen;
machine.onMessage({
family: machine.family
, address: machine.address
, port: machine.port
, data: machine.buf.slice(0, machine.bufIndex)
});
machine.chunkIndex += partLen; // === chunk.length
machine.buf = null; // reset to null
machine.bufIndex = 0; // reset to 0
return true;
};
machine.fns.addChunk = function (chunk) {
//console.log('');
//console.log('[addChunk]');
machine.chunkIndex = 0;
while (machine.chunkIndex < chunk.length) {
//console.log('chunkIndex:', machine.chunkIndex, 'state:', machine.state);
if (true === machine.fns[machine.states[machine.state]](chunk)) {
machine.state += 1;
machine.state %= machine.states_length;
}
}
};
return machine;
};

3
package.json
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@ -22,6 +22,7 @@
"homepage": "https://github.com/Daplie/node-tunnel-client#readme",
"dependencies": {
"jsonwebtoken": "^7.1.9",
"sni": "^1.0.0"
"sni": "^1.0.0",
"tunnel-packer": "^1.0.0"
}
}

BIN
sni.hello.bin
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Binary file not shown.

92
test-machine.js
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@ -1,92 +0,0 @@
'use strict';
var sni = require('sni');
var machine = require('./machine.js').create();
var hello = require('fs').readFileSync('./sni.hello.bin');
var version = 1;
var header = 'IPv4,127.0.1.1,443,' + hello.byteLength;
var buf = Buffer.concat([
Buffer.from([ 255 - version, header.length ])
, Buffer.from(header)
, hello
]);
var services = { 'ssh': 22, 'http': 4080, 'https': 8443 };
var clients = {};
var count = 0;
machine.onMessage = function (opts) {
var id = opts.family + ',' + opts.address + ',' + opts.port;
var service = 'https';
var port = services[service];
var servername = sni(opts.data);
console.log('');
console.log('[onMessage]');
if (!opts.data.equals(hello)) {
throw new Error("'data' packet is not equal to original 'hello' packet");
}
console.log('all', opts.data.byteLength, 'bytes are equal');
console.log('src:', opts.family, opts.address + ':' + opts.port);
console.log('dst:', 'IPv4 127.0.0.1:' + port);
if (!clients[id]) {
clients[id] = true;
if (!servername) {
throw new Error("no servername found for '" + id + "'");
}
console.log("servername: '" + servername + "'");
}
count += 1;
};
console.log('');
// full message in one go
// 223 = 2 + 22 + 199
console.log('[WHOLE BUFFER]', 2, header.length, hello.length, buf.byteLength);
clients = {};
machine.fns.addChunk(buf);
console.log('');
// messages one byte at a time
console.log('[BYTE-BY-BYTE BUFFER]', 1);
clients = {};
buf.forEach(function (byte) {
machine.fns.addChunk(Buffer.from([ byte ]));
});
console.log('');
// split messages in overlapping thirds
// 0-2 (2)
// 2-24 (22)
// 24-223 (199)
// 223-225 (2)
// 225-247 (22)
// 247-446 (199)
buf = Buffer.concat([ buf, buf ]);
console.log('[OVERLAPPING BUFFERS]', buf.length);
clients = {};
[ buf.slice(0, 7) // version + header
, buf.slice(7, 14) // header
, buf.slice(14, 21) // header
, buf.slice(21, 28) // header + body
, buf.slice(28, 217) // body
, buf.slice(217, 224) // body + version
, buf.slice(224, 238) // version + header
, buf.slice(238, buf.byteLength) // header + body
].forEach(function (buf) {
machine.fns.addChunk(Buffer.from(buf));
});
console.log('');
process.on('exit', function () {
if (count !== 4) {
throw new Error("should have delivered 4 messages, not", count);
}
console.log('TESTS PASS');
console.log('');
});