// 4/4a (connect, bind) - Supports domains & ipaddress
function negotiateSocks4(options, socket, callback) {
buff.writeUInt8(0x04);
buff.writeUInt8(options.proxy.command);
buff.writeUInt16BE(options.target.port);
// ipv4 or domain?
if (net.isIPv4(options.target.host)) {
buff.writeBuffer(ip.toBuffer(options.target.host));
buff.writeStringNT(options.proxy.userid);
} else {
buff.writeUInt8(0x00);
buff.writeUInt8(0x00);
buff.writeUInt8(0x00);
buff.writeUInt8(0x01);
buff.writeStringNT(options.proxy.userid);
buff.writeStringNT(options.target.host);
}
socket.once('data', receivedResponse);
socket.write(buff.toBuffer());
function receivedResponse(data) {
socket.pause();
if (data.length === 8 && data[1] === SOCKS4_RESPONSE.Granted) {
if (options.proxy.command === COMMAND.Bind) {
buff.clear();
buff.writeBuffer(data);
buff.skip(2);
var info = {
port: buff.readUInt16BE(),
host: buff.readUInt32BE()
};
if (info.host === 0) {
info.host = options.proxy.ipaddress;
} else {
info.host = ip.fromLong(info.host);
}
finish(null, socket, info, callback);
} else {
finish(null, socket, null, callback);
}
} else {
finish(new Error("Rejected (" + data[1] + ")"), socket, null, callback);
}
}
}
function patch(file, bin, from, to, callback) {
if(from === 1 && to === 2) {
// Set Version to 2
// Add 1 Byte
} else if(from === 2 && to === 1) {
// Set version to 1
// Remove 1 Byte
} else {
callback('Unsupported Patch - from Version: ' + from + ' to Version: ' + to)
}
var newFile = new SmartBuffer()
bin.data._readOffset = 0
bin.data._writeOffset = 0 // Reset read offset
newFile.writeUInt32LE(bin.readUInt32LE()) // SCN Version
newFile.writeUInt32LE(bin.readUInt32LE()) // Object ID
newFile.writeStringNT(bin.readStringNT()) // Object Name
newFile.writeStringNT(bin.readStringNT()) // Parent Name
newFile.writeBuffer(bin.readBuffer(68)) // or 16 x readFloatLE() ... But not needed ;o
if(from === 1 && to === 2) {
bin.skip(4)
newFile.writeUInt32LE(EScnVersion.Version2)
newFile.writeUInt32LE(bin.readUInt32LE()) // Object Count
newFile.writeUInt8(0) // Add missing 1 Byte
newFile.writeBuffer(bin.readRemaining()) // Read and add remaining data
} else if(from === 2 && to === 1) {
bin.skip(4)
newFile.writeUInt32LE(EScnVersion.Version1)
newFile.writeUInt32LE(bin.readUInt32LE()) // Object Count
bin.skip(1) // Remove 1 Byte
newFile.writeBuffer(bin.readRemaining()) // Read and add remaining data
}
// And save to target folder
fs.writeFile(Config.targetFolder + '/' + file, newFile.toBuffer(), { encoding: 'binary' }, function (err) {
if (err) throw err
callback()
})
}
function buildAuthChallenge(challenge, serverCaps, protocolVersion, licenseAgreement) {
assert(challenge.length === 8);
var hasLicense = !!licenseAgreement;
// Set the low bit for has-license flag.
serverCaps = (hasLicense) ? (serverCaps | 1)
: (serverCaps & ~1);
var buffer = new SmartBuffer();
buffer.writeBuffer(challenge, /* offset: */ 0);
buffer.writeUInt32LE(serverCaps);
buffer.writeUInt32LE(protocolVersion);
if (hasLicense) {
buffer.writeStringNT(licenseAgreement);
}
return buffer.toBuffer();
};