public async Task Send(MTProtoRequest request)
{
// TODO: refactor
if (needConfirmation.Any())
{
var ackRequest = new AckRequest(needConfirmation);
using (var memory = new MemoryStream())
using (var writer = new BinaryWriter(memory))
{
ackRequest.OnSend(writer);
await Send(memory.ToArray(), ackRequest);
needConfirmation.Clear();
}
}
using (var memory = new MemoryStream())
using (var writer = new BinaryWriter(memory))
{
request.OnSend(writer);
await Send(memory.ToArray(), request);
}
_session.Save();
}
public async Task Send(byte[] packet, MTProtoRequest request)
{
request.MessageId = _session.GetNewMessageId();
byte[] msgKey;
byte[] ciphertext;
using (MemoryStream plaintextPacket = makeMemory(8 + 8 + 8 + 4 + 4 + packet.Length))
{
using (BinaryWriter plaintextWriter = new BinaryWriter(plaintextPacket))
{
plaintextWriter.Write(_session.Salt);
plaintextWriter.Write(_session.Id);
plaintextWriter.Write(request.MessageId);
plaintextWriter.Write(GenerateSequence(request.Confirmed));
plaintextWriter.Write(packet.Length);
plaintextWriter.Write(packet);
msgKey = Helpers.CalcMsgKey(plaintextPacket.GetBuffer());
ciphertext = AES.EncryptAES(Helpers.CalcKey(_session.AuthKey.Data, msgKey, true), plaintextPacket.GetBuffer());
}
}
using (MemoryStream ciphertextPacket = makeMemory(8 + 16 + ciphertext.Length))
{
using (BinaryWriter writer = new BinaryWriter(ciphertextPacket))
{
writer.Write(_session.AuthKey.Id);
writer.Write(msgKey);
writer.Write(ciphertext);
await _transport.Send(ciphertextPacket.GetBuffer());
}
}
}
private bool HandleContainer(ulong messageId, int sequence, BinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
int size = messageReader.ReadInt32();
for (int i = 0; i < size; i++)
{
ulong innerMessageId = messageReader.ReadUInt64();
int innerSequence = messageReader.ReadInt32();
int innerLength = messageReader.ReadInt32();
long beginPosition = messageReader.BaseStream.Position;
try
{
if (!processMessage(innerMessageId, sequence, messageReader, request))
{
messageReader.BaseStream.Position = beginPosition + innerLength;
}
}
catch (Exception e)
{
// logger.error("failed to process message in contailer: {0}", e);
messageReader.BaseStream.Position = beginPosition + innerLength;
}
}
return false;
}
private bool HandleBadServerSalt(ulong messageId, int sequence, BinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
ulong badMsgId = messageReader.ReadUInt64();
int badMsgSeqNo = messageReader.ReadInt32();
int errorCode = messageReader.ReadInt32();
ulong newSalt = messageReader.ReadUInt64();
//logger.debug("bad_server_salt: msgid {0}, seq {1}, errorcode {2}, newsalt {3}", badMsgId, badMsgSeqNo, errorCode, newSalt);
_session.Salt = newSalt;
//resend
Send(request);
/*
if(!runningRequests.ContainsKey(badMsgId)) {
logger.debug("bad server salt on unknown message");
return true;
}
*/
//MTProtoRequest request = runningRequests[badMsgId];
//request.OnException(new MTProtoBadServerSaltException(salt));
return true;
}
private bool HandleRpcResult(ulong messageId, int sequence, BinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
ulong requestId = messageReader.ReadUInt64();
if (requestId == (ulong) request.MessageId)
request.ConfirmReceived = true;
//throw new NotImplementedException();
/*
lock (runningRequests)
{
if (!runningRequests.ContainsKey(requestId))
{
logger.warning("rpc response on unknown request: {0}", requestId);
messageReader.BaseStream.Position -= 12;
return false;
}
request = runningRequests[requestId];
runningRequests.Remove(requestId);
}
*/
uint innerCode = messageReader.ReadUInt32();
if (innerCode == 0x2144ca19)
{ // rpc_error
int errorCode = messageReader.ReadInt32();
string errorMessage = Serializers.String.read(messageReader);
if (errorMessage.StartsWith("FLOOD_WAIT_"))
{
var resultString = Regex.Match(errorMessage, @"\d+").Value;
var seconds = int.Parse(resultString);
Debug.WriteLine($"Should wait {seconds} sec.");
Thread.Sleep(1000*seconds);
}
else if (errorMessage.StartsWith("PHONE_MIGRATE_"))
{
var resultString = Regex.Match(errorMessage, @"\d+").Value;
var dcIdx = int.Parse(resultString);
var exception = new InvalidOperationException($"Your phone number registered to {dcIdx} dc. Please update settings. See https://github.com/sochix/TLSharp#i-get-an-error-migrate_x for details.");
exception.Data.Add("dcId", dcIdx);
throw exception;
}
else
{
throw new InvalidOperationException(errorMessage);
}
}
else if (innerCode == 0x3072cfa1)
{
try
{
// gzip_packed
byte[] packedData = Serializers.Bytes.read(messageReader);
using (var packedStream = new MemoryStream(packedData, false))
using (var zipStream = new GZipStream(packedStream, CompressionMode.Decompress))
using (var compressedReader = new BinaryReader(zipStream))
{
request.OnResponse(compressedReader);
}
}
catch (ZlibException ex)
{
}
}
else
{
messageReader.BaseStream.Position -= 4;
request.OnResponse(messageReader);
}
return false;
}
private bool HandleGzipPacked(ulong messageId, int sequence, BinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
byte[] packedData = GZipStream.UncompressBuffer(Serializers.Bytes.read(messageReader));
using (MemoryStream packedStream = new MemoryStream(packedData, false))
using (BinaryReader compressedReader = new BinaryReader(packedStream))
{
processMessage(messageId, sequence, compressedReader, request);
}
return true;
}
private bool processMessage(ulong messageId, int sequence, BinaryReader messageReader, MTProtoRequest request)
{
// TODO: check salt
// TODO: check sessionid
// TODO: check seqno
//logger.debug("processMessage: msg_id {0}, sequence {1}, data {2}", BitConverter.ToString(((MemoryStream)messageReader.BaseStream).GetBuffer(), (int) messageReader.BaseStream.Position, (int) (messageReader.BaseStream.Length - messageReader.BaseStream.Position)).Replace("-","").ToLower());
needConfirmation.Add(messageId);
uint code = messageReader.ReadUInt32();
messageReader.BaseStream.Position -= 4;
switch (code)
{
case 0x73f1f8dc: // container
//logger.debug("MSG container");
return HandleContainer(messageId, sequence, messageReader, request);
case 0x7abe77ec: // ping
//logger.debug("MSG ping");
return HandlePing(messageId, sequence, messageReader);
case 0x347773c5: // pong
//logger.debug("MSG pong");
return HandlePong(messageId, sequence, messageReader);
case 0xae500895: // future_salts
//logger.debug("MSG future_salts");
return HandleFutureSalts(messageId, sequence, messageReader);
case 0x9ec20908: // new_session_created
//logger.debug("MSG new_session_created");
return HandleNewSessionCreated(messageId, sequence, messageReader);
case 0x62d6b459: // msgs_ack
//logger.debug("MSG msds_ack");
return HandleMsgsAck(messageId, sequence, messageReader);
case 0xedab447b: // bad_server_salt
//logger.debug("MSG bad_server_salt");
return HandleBadServerSalt(messageId, sequence, messageReader, request);
case 0xa7eff811: // bad_msg_notification
//logger.debug("MSG bad_msg_notification");
return HandleBadMsgNotification(messageId, sequence, messageReader);
case 0x276d3ec6: // msg_detailed_info
//logger.debug("MSG msg_detailed_info");
return HandleMsgDetailedInfo(messageId, sequence, messageReader);
case 0xf35c6d01: // rpc_result
//logger.debug("MSG rpc_result");
return HandleRpcResult(messageId, sequence, messageReader, request);
case 0x3072cfa1: // gzip_packed
//logger.debug("MSG gzip_packed");
return HandleGzipPacked(messageId, sequence, messageReader, request);
case 0xe317af7e:
case 0xd3f45784:
case 0x2b2fbd4e:
case 0x78d4dec1:
case 0x725b04c3:
case 0x74ae4240:
return HandleUpdate(messageId, sequence, messageReader);
default:
//logger.debug("unknown message: {0}", code);
return false;
}
}
public async Task<byte[]> Recieve(MTProtoRequest request)
{
while (!request.ConfirmReceived)
{
var result = DecodeMessage((await _transport.Receieve()).Body);
using (var messageStream = new MemoryStream(result.Item1, false))
using (var messageReader = new BinaryReader(messageStream))
{
processMessage(result.Item2, result.Item3, messageReader, request);
}
}
return null;
}
private bool HandleRpcResult(ulong messageId, int sequence, BinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
ulong requestId = messageReader.ReadUInt64();
if (requestId == (ulong) request.MessageId)
request.ConfirmReceived = true;
//throw new NotImplementedException();
/*
lock (runningRequests)
{
if (!runningRequests.ContainsKey(requestId))
{
logger.warning("rpc response on unknown request: {0}", requestId);
messageReader.BaseStream.Position -= 12;
return false;
}
request = runningRequests[requestId];
runningRequests.Remove(requestId);
}
*/
uint innerCode = messageReader.ReadUInt32();
if (innerCode == 0x2144ca19)
{ // rpc_error
int errorCode = messageReader.ReadInt32();
string errorMessage = Serializers.String.read(messageReader);
if (errorMessage.StartsWith("FLOOD_WAIT_"))
{
var resultString = Regex.Match(errorMessage, @"\d+").Value;
var seconds = int.Parse(resultString);
Debug.WriteLine($"Should wait {seconds} sec.");
Thread.Sleep(1000*seconds);
}
else
{
throw new InvalidOperationException(errorMessage);
}
}
else if (innerCode == 0x3072cfa1)
{
// gzip_packed
byte[] packedData = Serializers.Bytes.read(messageReader);
using (MemoryStream packedStream = new MemoryStream(packedData, false))
using (GZipStream zipStream = new GZipStream(packedStream, CompressionMode.Decompress))
using (BinaryReader compressedReader = new BinaryReader(zipStream))
{
request.OnResponse(compressedReader);
}
}
else
{
messageReader.BaseStream.Position -= 4;
request.OnResponse(messageReader);
}
return false;
}
