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index.js
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index.js
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var Connection = require('ssh2');
var net = require('net');
function SSHTunnel(config, callback) {
var self = this;
self._verbose = config.verbose || false;
self._config = config;
if (callback) {
self.connect(callback);
}
}
SSHTunnel.prototype.log = function () {
if (this._verbose) {
console.log.apply(null, arguments);
}
};
SSHTunnel.prototype.close = function (callback) {
var self = this;
this.server.close(function (error) {
self.connection.end();
if (callback) {
callback(error);
}
});
};
SSHTunnel.prototype.connect = function (callback) {
var self = this,
disabled = self._config.disabled,
remotePort = self._config.remotePort,
localPort = self._config.localPort,
remoteHost = self._config.remoteHost || '127.0.0.1';
if(disabled){
return callback(null);
}
var c = self.connection = new Connection();
c.on('ready', function () {
self.server = net.createServer(function (connection) {
var buffers = [];
var addBuffer = function (data) {
buffers.push(data);
};
connection.on('data', addBuffer);
c.forwardOut('', 0, remoteHost, remotePort, function (error, ssh) {
if (error){
// close connection
connection.removeAllListeners();
connection.end();
c.emit('error', error);
return;
}
while (buffers.length) {
ssh.write(buffers.shift());
}
connection.removeListener('data', addBuffer);
ssh.on('data', function (buf) {
connection.write(buf);
});
connection.on('data', function (buf) {
ssh.write(buf);
});
connection.on('end', function () {
self.log('connection::end');
ssh.removeAllListeners();
ssh.end();
});
ssh.on('end', function () {
self.log('ssh::end');
connection.removeAllListeners();
connection.end();
});
});
});
self.server.listen(localPort, callback);
// handle error when self.server.listen fails (e.g. port is already used)
self.server.on('error', function(err){
callback(err);
self.connection.end();
});
});
c.on('error', function (err) {
self.log('ssh2::error:: ' + err);
callback(err);
});
c.on('end', function () {
self.log('ssh2::end');
});
c.on('close', function (err) {
self.log('ssh2::close');
});
c.connect(self._config.sshConfig);
};
module.exports = SSHTunnel;