mirror of
https://github.com/danog/libtgvoip.git
synced 2024-12-02 17:51:06 +01:00
1014 lines
38 KiB
C++
1014 lines
38 KiB
C++
#include "../PrivateDefines.cpp"
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#include "PacketManager.h"
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using namespace tgvoip;
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using namespace std;
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#pragma mark - Networking & crypto
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PacketManager &VoIPController::getBestPacketManager()
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{
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#if PROTOCOL_VERSION == 9
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return packetManager;
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#else
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return outgoingStreams.empty() ? packetManager : outgoingStreams[0]->packetSender->getPacketManager();
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#endif
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}
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void VoIPController::ProcessIncomingPacket(NetworkPacket &packet, Endpoint &srcEndpoint)
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{
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ENFORCE_MSG_THREAD;
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// Initial packet decryption and recognition
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unsigned char *buffer = *packet.data;
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size_t len = packet.data.Length();
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BufferInputStream in(packet.data);
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if (peerVersion < 9 || srcEndpoint.IsReflector())
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{
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if (in.Remaining() < 16)
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{
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LOGW("Received packet has wrong (no) peerTag");
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return;
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}
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if (memcmp(buffer, srcEndpoint.IsReflector() ? (void *)srcEndpoint.peerTag : (void *)callID, 16) != 0)
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{
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LOGW("Received packet has wrong peerTag");
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return;
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}
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in.Seek(16);
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}
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if (in.Remaining() >= 16 && srcEndpoint.IsReflector() && parseRelayPacket(in, srcEndpoint))
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{
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return;
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}
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if (in.Remaining() < 40)
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{
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LOGV("Received packet is too small");
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return;
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}
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size_t innerLen = decryptPacket(buffer, in);
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if (!innerLen) // Decryption failed
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{
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return;
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}
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lastRecvPacketTime = GetCurrentTime();
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if (state == STATE_RECONNECTING)
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{
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LOGI("Received a valid packet while reconnecting - setting state to established");
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SetState(STATE_ESTABLISHED);
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}
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if (srcEndpoint.type == Endpoint::Type::UDP_P2P_INET && !srcEndpoint.IsIPv6Only())
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{
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if (srcEndpoint.port != packet.port || srcEndpoint.address != packet.address)
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{
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if (!packet.address.isIPv6)
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{
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LOGI("Incoming packet was decrypted successfully, changing P2P endpoint to %s:%u", packet.address.ToString().c_str(), packet.port);
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srcEndpoint.address = packet.address;
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srcEndpoint.port = packet.port;
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}
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}
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}
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// decryptedAudioBlock random_id:long random_bytes:string flags:# voice_call_id:flags.2?int128 in_seq_no:flags.4?int out_seq_no:flags.4?int
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// recent_received_mask:flags.5?int proto:flags.3?int extra:flags.1?string raw_data:flags.0?string = DecryptedAudioBlock
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//
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// simpleAudioBlock random_id:long random_bytes:string raw_data:string = DecryptedAudioBlock;
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// Version-specific extraction of packet fields ackId (last received packet seq on remote), (incoming packet seq) pseq, (ack mask) acks, (packet type) type, (flags) pflags, packet length
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uint32_t ackId; // Last received packet seqno on remote
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uint32_t pseq; // Incoming packet seqno
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uint32_t acks; // Ack mask
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unsigned char type, pflags; // Packet type, flags
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uint8_t transportId = 0xFF; // Transport ID for reliable multiplexing
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size_t packetInnerLen = 0;
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if (peerVersion >= 8 || (!peerVersion && connectionMaxLayer >= 92))
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{
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type = in.ReadByte();
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ackId = in.ReadUInt32();
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pseq = in.ReadUInt32();
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acks = in.ReadUInt32();
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pflags = in.ReadByte();
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packetInnerLen = innerLen - 14;
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}
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else if (!legacyParsePacket(in, type, ackId, pseq, acks, pflags, packetInnerLen))
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{
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return;
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}
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packetsReceived++;
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// Use packet manager of outgoing streams on both sides (probably should separate in separate vector)
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PacketManager *manager = transportId == 0xFF ? &packetManager : &outgoingStreams[transportId]->packetSender->getPacketManager();
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if (!manager->ackRemoteSeq(pseq))
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{
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return;
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}
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#ifdef LOG_PACKETS
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LOGV("Received: from=%s:%u, seq=%u, length=%u, type=%s, transportId=%hhu", srcEndpoint.GetAddress().ToString().c_str(), srcEndpoint.port, pseq, (unsigned int)packet.data.Length(), GetPacketTypeString(type).c_str(), transportId);
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#endif
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// Extra data
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if (pflags & XPFLAG_HAS_EXTRA)
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{
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unsigned char extraCount = in.ReadByte();
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for (int i = 0; i < extraCount; i++)
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{
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size_t extraLen = in.ReadByte();
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Buffer xbuffer(extraLen);
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in.ReadBytes(*xbuffer, extraLen);
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ProcessExtraData(xbuffer);
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}
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}
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uint32_t recvTS = 0;
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if (pflags & XPFLAG_HAS_RECV_TS)
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{
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recvTS = in.ReadUInt32();
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}
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if (seqgt(ackId, manager->getLastAckedSeq()))
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{
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if (waitingForAcks && manager->getLastAckedSeq() >= firstSentPing)
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{
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rttHistory.Reset();
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waitingForAcks = false;
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dontSendPackets = 10;
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messageThread.Post(
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[this] {
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dontSendPackets = 0;
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},
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1.0);
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LOGI("resuming sending");
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}
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conctl.PacketAcknowledged(ackId);
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manager->ackLocal(ackId, acks);
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if (transportId != 0xFF && !incomingStreams.empty() && incomingStreams[transportId]->jitterBuffer)
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{
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// Technically I should be using the specific packet manager's rtt history but will separate later
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uint32_t tooOldSeq = incomingStreams[transportId]->jitterBuffer->GetSeqTooLate(rttHistory[0]);
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LOGW("Reverse acking seqs older than %u, newest seq received from remote %u (transportId %hhu)", tooOldSeq, manager->getLastRemoteSeq(), transportId);
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manager->ackRemoteSeqsOlderThan(tooOldSeq);
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}
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for (auto &opkt : manager->getRecentOutgoingPackets())
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{
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if (opkt.ackTime)
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{
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continue;
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}
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if (manager->wasLocalAcked(opkt.seq))
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{
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opkt.data = Buffer();
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opkt.ackTime = GetCurrentTime();
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opkt.rttTime = opkt.ackTime - opkt.sendTime;
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if (opkt.lost)
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{
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LOGW("acknowledged lost packet %u (transportId %hhu)", opkt.seq, transportId);
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sendLosses--;
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}
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if (opkt.sender && !opkt.lost)
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{ // don't report lost packets as acknowledged to PacketSenders
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opkt.sender->PacketAcknowledged(opkt.seq, opkt.sendTime, recvTS / 1000.0f, opkt.type, opkt.size);
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}
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// TODO move this to a PacketSender
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conctl.PacketAcknowledged(opkt.seq);
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}
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else if (peerVersion >= PROTOCOL_RELIABLE && opkt.data.Length() && opkt.seq < manager->getLastAckedSeq())
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{
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if (manager->getLastAckedSeq() - opkt.seq > 32)
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{
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LOGW("Marking reliable NACK packet %u as lost, since is more than 32 seqs old (last acked %u, transportId %hhu)", opkt.seq, manager->getLastAckedSeq(), transportId);
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opkt.lost = true;
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opkt.data = Buffer();
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continue;
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}
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if (opkt.sendTime + rttHistory[0] < VoIPController::GetCurrentTime())
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{
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LOGW("It is possibly a bit too early to resend NACK packet %u (transportId %hhu)", opkt.seq, transportId);
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}
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LOGW("Resending reliable NACK packet %u, (transportId %hhu)", opkt.seq, transportId);
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BufferOutputStream copy(opkt.data.Length());
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copy.WriteBytes(opkt.data);
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Endpoint *endpoint = GetEndpointById(opkt.endpoint);
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if (!endpoint)
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{
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LOGE("Recent NACK queue contained packet (%u) for nonexistent endpoint, (transportId %hhu)", opkt.seq, transportId);
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opkt.lost = true;
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opkt.data = Buffer();
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continue;
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}
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opkt.sendTime = GetCurrentTime();
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SendPacket(copy.GetBuffer(), copy.GetLength(), *endpoint, opkt.seq, opkt.type, transportId);
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//SendOrEnqueuePacket()
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}
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}
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if (peerVersion >= 6)
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{
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for (auto x = currentExtras.begin(); x != currentExtras.end();)
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{
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if (x->firstContainingSeq != 0 && seqgte(manager->getLastAckedSeq(), x->firstContainingSeq))
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{
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LOGV("Peer acknowledged extra type %u length %u", x->type, (unsigned int)x->data.Length());
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ProcessAcknowledgedOutgoingExtra(*x);
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x = currentExtras.erase(x);
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continue;
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}
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++x;
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}
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}
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if (peerVersion < PROTOCOL_RELIABLE)
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handleReliablePackets(); // Use old reliability logic
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}
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Endpoint &_currentEndpoint = endpoints.at(currentEndpoint);
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if (srcEndpoint.id != currentEndpoint && srcEndpoint.IsReflector() && (_currentEndpoint.IsP2P() || _currentEndpoint.averageRTT == 0))
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{
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if (seqgt(manager->getLastSentSeq() - 32, manager->getLastAckedSeq()))
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{
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currentEndpoint = srcEndpoint.id;
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_currentEndpoint = srcEndpoint;
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LOGI("Peer network address probably changed, switching to relay");
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if (allowP2p)
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SendPublicEndpointsRequest();
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}
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}
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/*
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if (config.logPacketStats)
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{
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DebugLoggedPacket dpkt = {
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static_cast<int32_t>(pseq),
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GetCurrentTime() - connectionInitTime,
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static_cast<int32_t>(packet.data.Length())};
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debugLoggedPackets.push_back(dpkt);
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if (debugLoggedPackets.size() >= 2500)
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{
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debugLoggedPackets.erase(debugLoggedPackets.begin(), debugLoggedPackets.begin() + 500);
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}
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}*/
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if (unacknowledgedIncomingPacketCount++ > unackNopThreshold)
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{
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//LOGV("Sending nop packet as ack");
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SendNopPacket(packetManager);
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}
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//LOGV("acks: %u -> %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf", manager.getLastAckedSeq()(), remoteAcks[0], remoteAcks[1], remoteAcks[2], remoteAcks[3], remoteAcks[4], remoteAcks[5], remoteAcks[6], remoteAcks[7]);
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//LOGD("recv: %u -> %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf", getLastRemoteSeq(), recvPacketTimes[0], recvPacketTimes[1], recvPacketTimes[2], recvPacketTimes[3], recvPacketTimes[4], recvPacketTimes[5], recvPacketTimes[6], recvPacketTimes[7]);
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//LOGI("RTT = %.3lf", GetAverageRTT());
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//LOGV("Packet %u type is %d", pseq, type);
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if (type == PKT_INIT)
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{
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LOGD("Received init");
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uint32_t ver = in.ReadUInt32();
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if (!receivedInit)
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peerVersion = ver;
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LOGI("Peer version is %d", peerVersion);
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uint32_t minVer = in.ReadUInt32();
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if (minVer > PROTOCOL_VERSION || peerVersion < MIN_PROTOCOL_VERSION)
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{
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lastError = ERROR_INCOMPATIBLE;
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SetState(STATE_FAILED);
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return;
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}
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uint32_t flags = in.ReadUInt32();
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if (!receivedInit)
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{
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if (flags & INIT_FLAG_DATA_SAVING_ENABLED)
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{
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dataSavingRequestedByPeer = true;
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UpdateDataSavingState();
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UpdateAudioBitrateLimit();
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}
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if (flags & INIT_FLAG_GROUP_CALLS_SUPPORTED)
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{
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peerCapabilities |= TGVOIP_PEER_CAP_GROUP_CALLS;
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}
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if (flags & INIT_FLAG_VIDEO_RECV_SUPPORTED)
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{
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peerCapabilities |= TGVOIP_PEER_CAP_VIDEO_DISPLAY;
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}
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if (flags & INIT_FLAG_VIDEO_SEND_SUPPORTED)
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{
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peerCapabilities |= TGVOIP_PEER_CAP_VIDEO_CAPTURE;
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}
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}
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unsigned int i;
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unsigned char numSupportedAudioCodecs = in.ReadByte();
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for (i = 0; i < numSupportedAudioCodecs; i++)
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{
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if (peerVersion < 5)
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in.ReadByte(); // ignore for now
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else
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in.ReadInt32();
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}
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if (!receivedInit && ((flags & INIT_FLAG_VIDEO_SEND_SUPPORTED && config.enableVideoReceive) || (flags & INIT_FLAG_VIDEO_RECV_SUPPORTED && config.enableVideoSend)))
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{
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LOGD("Peer video decoders:");
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unsigned int numSupportedVideoDecoders = in.ReadByte();
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for (i = 0; i < numSupportedVideoDecoders; i++)
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{
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uint32_t id = in.ReadUInt32();
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peerVideoDecoders.push_back(id);
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char *_id = reinterpret_cast<char *>(&id);
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LOGD("%c%c%c%c", _id[3], _id[2], _id[1], _id[0]);
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}
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protocolInfo.maxVideoResolution = in.ReadByte();
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SetupOutgoingVideoStream();
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}
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BufferOutputStream out(1024);
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out.WriteInt32(PROTOCOL_VERSION);
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out.WriteInt32(MIN_PROTOCOL_VERSION);
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out.WriteByte((unsigned char)outgoingStreams.size());
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for (const auto &stream : outgoingStreams)
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{
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out.WriteByte(stream->id);
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out.WriteByte(stream->type);
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if (peerVersion < 5)
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out.WriteByte((unsigned char)(stream->codec == CODEC_OPUS ? CODEC_OPUS_OLD : 0));
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else
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out.WriteInt32(stream->codec);
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out.WriteInt16(stream->frameDuration);
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out.WriteByte((unsigned char)(stream->enabled ? 1 : 0));
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}
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LOGI("Sending init ack");
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size_t outLength = out.GetLength();
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SendOrEnqueuePacket(PendingOutgoingPacket{
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/*.seq=*/packetManager.nextLocalSeq(),
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/*.type=*/PKT_INIT_ACK,
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/*.len=*/outLength,
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/*.data=*/Buffer(move(out)),
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/*.endpoint=*/0});
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if (!receivedInit)
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{
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receivedInit = true;
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if ((srcEndpoint.type == Endpoint::Type::UDP_RELAY && udpConnectivityState != UDP_BAD && udpConnectivityState != UDP_NOT_AVAILABLE) || srcEndpoint.type == Endpoint::Type::TCP_RELAY)
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{
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currentEndpoint = srcEndpoint.id;
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if (srcEndpoint.type == Endpoint::Type::UDP_RELAY || (useTCP && srcEndpoint.type == Endpoint::Type::TCP_RELAY))
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preferredRelay = srcEndpoint.id;
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}
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}
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if (!audioStarted && receivedInitAck)
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{
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StartAudio();
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audioStarted = true;
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}
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}
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if (type == PKT_INIT_ACK)
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{
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LOGD("Received init ack");
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if (!receivedInitAck)
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{
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receivedInitAck = true;
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messageThread.Cancel(initTimeoutID);
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initTimeoutID = MessageThread::INVALID_ID;
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if (packetInnerLen > 10)
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{
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peerVersion = in.ReadInt32();
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uint32_t minVer = in.ReadUInt32();
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if (minVer > PROTOCOL_VERSION || peerVersion < MIN_PROTOCOL_VERSION)
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{
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lastError = ERROR_INCOMPATIBLE;
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SetState(STATE_FAILED);
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return;
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}
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}
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else
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{
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peerVersion = 1;
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}
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LOGI("peer version from init ack %d", peerVersion);
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unsigned char streamCount = in.ReadByte();
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if (streamCount == 0)
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return;
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int i;
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shared_ptr<Stream> incomingAudioStream = nullptr;
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for (i = 0; i < streamCount; i++)
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{
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shared_ptr<Stream> stm = make_shared<Stream>();
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stm->id = in.ReadByte();
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stm->type = static_cast<StreamType>(in.ReadByte());
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if (peerVersion < 5)
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{
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unsigned char codec = in.ReadByte();
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if (codec == CODEC_OPUS_OLD)
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stm->codec = CODEC_OPUS;
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}
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else
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{
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stm->codec = in.ReadUInt32();
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}
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in.ReadInt16();
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stm->frameDuration = 60;
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stm->enabled = in.ReadByte() == 1;
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if (stm->type == STREAM_TYPE_VIDEO && peerVersion < 9)
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{
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LOGV("Skipping video stream for old protocol version");
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continue;
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}
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if (stm->type == STREAM_TYPE_AUDIO)
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{
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stm->jitterBuffer = make_shared<JitterBuffer>(stm->frameDuration);
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if (stm->frameDuration > 50)
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stm->jitterBuffer->SetMinPacketCount(ServerConfig::GetSharedInstance()->GetUInt("jitter_initial_delay_60", 2));
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else if (stm->frameDuration > 30)
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stm->jitterBuffer->SetMinPacketCount(ServerConfig::GetSharedInstance()->GetUInt("jitter_initial_delay_40", 4));
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else
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stm->jitterBuffer->SetMinPacketCount(ServerConfig::GetSharedInstance()->GetUInt("jitter_initial_delay_20", 6));
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stm->decoder = nullptr;
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}
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else if (stm->type == STREAM_TYPE_VIDEO)
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{
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if (!stm->packetReassembler)
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{
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stm->packetReassembler = make_shared<PacketReassembler>();
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stm->packetReassembler->SetCallback(bind(&VoIPController::ProcessIncomingVideoFrame, this, placeholders::_1, placeholders::_2, placeholders::_3, placeholders::_4));
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}
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}
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else
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{
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LOGW("Unknown incoming stream type: %d", stm->type);
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continue;
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}
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incomingStreams.push_back(stm);
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if (stm->type == STREAM_TYPE_AUDIO && !incomingAudioStream)
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incomingAudioStream = stm;
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}
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if (!incomingAudioStream)
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return;
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if (peerVersion >= 5 && !useMTProto2)
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{
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useMTProto2 = true;
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LOGD("MTProto2 wasn't initially enabled for whatever reason but peer supports it; upgrading");
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}
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if (!audioStarted && receivedInit)
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{
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StartAudio();
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audioStarted = true;
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}
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messageThread.Post(
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[this] {
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if (state == STATE_WAIT_INIT_ACK)
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{
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SetState(STATE_ESTABLISHED);
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}
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},
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ServerConfig::GetSharedInstance()->GetDouble("established_delay_if_no_stream_data", 1.5));
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if (allowP2p)
|
|
SendPublicEndpointsRequest();
|
|
}
|
|
}
|
|
if (type == PKT_STREAM_DATA || type == PKT_STREAM_DATA_X2 || type == PKT_STREAM_DATA_X3)
|
|
{
|
|
if (!receivedFirstStreamPacket)
|
|
{
|
|
receivedFirstStreamPacket = true;
|
|
if (state != STATE_ESTABLISHED && receivedInitAck)
|
|
{
|
|
messageThread.Post(
|
|
[this]() {
|
|
SetState(STATE_ESTABLISHED);
|
|
},
|
|
.5);
|
|
LOGW("First audio packet - setting state to ESTABLISHED");
|
|
}
|
|
}
|
|
if (srcEndpoint.type == Endpoint::Type::UDP_RELAY && srcEndpoint.id != peerPreferredRelay)
|
|
{
|
|
peerPreferredRelay = srcEndpoint.id;
|
|
}
|
|
|
|
uint8_t count = 1;
|
|
switch (type)
|
|
{
|
|
case PKT_STREAM_DATA_X2:
|
|
count = 2;
|
|
break;
|
|
case PKT_STREAM_DATA_X3:
|
|
count = 3;
|
|
break;
|
|
}
|
|
uint8_t i;
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
unsigned char streamID = in.ReadByte();
|
|
unsigned char flags = (unsigned char)(streamID & 0xC0);
|
|
streamID &= 0x3F;
|
|
uint16_t sdlen = (uint16_t)(flags & STREAM_DATA_FLAG_LEN16 ? in.ReadInt16() : in.ReadByte());
|
|
uint32_t pts = in.ReadUInt32();
|
|
unsigned char fragmentCount = 1;
|
|
unsigned char fragmentIndex = 0;
|
|
//LOGE("RECV: For pts %u = seq %u, got seq %u", pts, pts/60 + 1, pseq);
|
|
|
|
//LOGD("stream data, pts=%d, len=%d, rem=%d", pts, sdlen, in.Remaining());
|
|
audioTimestampIn = pts;
|
|
if (!audioOutStarted && audioOutput)
|
|
{
|
|
MutexGuard m(audioIOMutex);
|
|
audioOutput->Start();
|
|
audioOutStarted = true;
|
|
}
|
|
bool fragmented = static_cast<bool>(sdlen & STREAM_DATA_XFLAG_FRAGMENTED);
|
|
bool extraFEC = static_cast<bool>(sdlen & STREAM_DATA_XFLAG_EXTRA_FEC);
|
|
bool keyframe = static_cast<bool>(sdlen & STREAM_DATA_XFLAG_KEYFRAME);
|
|
if (fragmented)
|
|
{
|
|
fragmentIndex = in.ReadByte();
|
|
fragmentCount = in.ReadByte();
|
|
}
|
|
sdlen &= 0x7FF;
|
|
if (in.GetOffset() + sdlen > len)
|
|
{
|
|
return;
|
|
}
|
|
shared_ptr<Stream> stm;
|
|
for (shared_ptr<Stream> &ss : incomingStreams)
|
|
{
|
|
if (ss->id == streamID)
|
|
{
|
|
stm = ss;
|
|
break;
|
|
}
|
|
}
|
|
if (stm && stm->type == STREAM_TYPE_AUDIO)
|
|
{
|
|
if (stm->jitterBuffer)
|
|
{
|
|
stm->jitterBuffer->HandleInput(static_cast<unsigned char *>(buffer + in.GetOffset()), sdlen, pts, false);
|
|
/*if (peerVersion >= PROTOCOL_RELIABLE)
|
|
{
|
|
// Technically I should be using the specific packet manager's rtt history but will separate later
|
|
uint32_t tooOldSeq = stm->jitterBuffer->GetSeqTooLate(rttHistory[0]) - 1;
|
|
LOGW("Reverse acking seqs older than %u, newest acked seq %u (transportId %hhu)", tooOldSeq, manager->getLastRemoteSeq(), transportId);
|
|
manager->ackRemoteSeqsOlderThan(tooOldSeq);
|
|
}*/
|
|
if (extraFEC)
|
|
{
|
|
in.Seek(in.GetOffset() + sdlen);
|
|
unsigned int fecCount = in.ReadByte();
|
|
for (unsigned int j = 0; j < fecCount; j++)
|
|
{
|
|
unsigned char dlen = in.ReadByte();
|
|
unsigned char data[256];
|
|
in.ReadBytes(data, dlen);
|
|
stm->jitterBuffer->HandleInput(data, dlen, pts - (fecCount - j) * stm->frameDuration, true);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (stm && stm->type == STREAM_TYPE_VIDEO)
|
|
{
|
|
if (stm->packetReassembler)
|
|
{
|
|
uint8_t frameSeq = in.ReadByte();
|
|
Buffer pdata(sdlen);
|
|
uint16_t rotation = 0;
|
|
if (fragmentIndex == 0)
|
|
{
|
|
unsigned char _rotation = in.ReadByte() & (unsigned char)VIDEO_ROTATION_MASK;
|
|
switch (_rotation)
|
|
{
|
|
case VIDEO_ROTATION_0:
|
|
rotation = 0;
|
|
break;
|
|
case VIDEO_ROTATION_90:
|
|
rotation = 90;
|
|
break;
|
|
case VIDEO_ROTATION_180:
|
|
rotation = 180;
|
|
break;
|
|
case VIDEO_ROTATION_270:
|
|
rotation = 270;
|
|
break;
|
|
default: // unreachable on sane CPUs
|
|
abort();
|
|
}
|
|
//if(rotation!=stm->rotation){
|
|
// stm->rotation=rotation;
|
|
// LOGI("Video rotation: %u", rotation);
|
|
//}
|
|
}
|
|
pdata.CopyFrom(buffer + in.GetOffset(), 0, sdlen);
|
|
stm->packetReassembler->AddFragment(std::move(pdata), fragmentIndex, fragmentCount, pts, frameSeq, keyframe, rotation);
|
|
}
|
|
//LOGV("Received video fragment %u of %u", fragmentIndex, fragmentCount);
|
|
}
|
|
else
|
|
{
|
|
LOGW("received packet for unknown stream %u", (unsigned int)streamID);
|
|
}
|
|
if (i < count - 1)
|
|
in.Seek(in.GetOffset() + sdlen);
|
|
}
|
|
}
|
|
if (type == PKT_PING)
|
|
{
|
|
//LOGD("Received ping from %s:%d", srcEndpoint.address.ToString().c_str(), srcEndpoint.port);
|
|
if (srcEndpoint.type != Endpoint::Type::UDP_RELAY && srcEndpoint.type != Endpoint::Type::TCP_RELAY && !allowP2p)
|
|
{
|
|
LOGW("Received p2p ping but p2p is disabled by manual override");
|
|
return;
|
|
}
|
|
BufferOutputStream pkt(128);
|
|
pkt.WriteInt32(pseq);
|
|
size_t pktLength = pkt.GetLength();
|
|
SendOrEnqueuePacket(PendingOutgoingPacket{
|
|
/*.seq=*/packetManager.nextLocalSeq(),
|
|
/*.type=*/PKT_PONG,
|
|
/*.len=*/pktLength,
|
|
/*.data=*/Buffer(move(pkt)),
|
|
/*.endpoint=*/srcEndpoint.id,
|
|
});
|
|
}
|
|
if (type == PKT_PONG)
|
|
{
|
|
if (packetInnerLen >= 4)
|
|
{
|
|
uint32_t pingSeq = in.ReadUInt32();
|
|
#ifdef LOG_PACKETS
|
|
LOGD("Received pong for ping in seq %u", pingSeq);
|
|
#endif
|
|
if (pingSeq == srcEndpoint.lastPingSeq)
|
|
{
|
|
srcEndpoint.rtts.Add(GetCurrentTime() - srcEndpoint.lastPingTime);
|
|
srcEndpoint.averageRTT = srcEndpoint.rtts.NonZeroAverage();
|
|
LOGD("Current RTT via %s: %.3f, average: %.3f", packet.address.ToString().c_str(), srcEndpoint.rtts[0], srcEndpoint.averageRTT);
|
|
if (srcEndpoint.averageRTT > rateMaxAcceptableRTT)
|
|
needRate = true;
|
|
}
|
|
}
|
|
}
|
|
if (type == PKT_STREAM_STATE)
|
|
{
|
|
unsigned char id = in.ReadByte();
|
|
unsigned char enabled = in.ReadByte();
|
|
LOGV("Peer stream state: id %u flags %u", (int)id, (int)enabled);
|
|
for (vector<shared_ptr<Stream>>::iterator s = incomingStreams.begin(); s != incomingStreams.end(); ++s)
|
|
{
|
|
if ((*s)->id == id)
|
|
{
|
|
(*s)->enabled = enabled == 1;
|
|
UpdateAudioOutputState();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (type == PKT_LAN_ENDPOINT)
|
|
{
|
|
LOGV("received lan endpoint");
|
|
uint32_t peerAddr = in.ReadUInt32();
|
|
uint16_t peerPort = (uint16_t)in.ReadInt32();
|
|
constexpr int64_t lanID = static_cast<int64_t>(FOURCC('L', 'A', 'N', '4')) << 32;
|
|
unsigned char peerTag[16];
|
|
Endpoint lan(lanID, peerPort, NetworkAddress::IPv4(peerAddr), NetworkAddress::Empty(), Endpoint::Type::UDP_P2P_LAN, peerTag);
|
|
|
|
if (currentEndpoint == lanID)
|
|
currentEndpoint = preferredRelay;
|
|
|
|
MutexGuard m(endpointsMutex);
|
|
endpoints[lanID] = lan;
|
|
}
|
|
if (type == PKT_NETWORK_CHANGED && _currentEndpoint.IsP2P())
|
|
{
|
|
currentEndpoint = preferredRelay;
|
|
if (allowP2p)
|
|
SendPublicEndpointsRequest();
|
|
if (peerVersion >= 2)
|
|
{
|
|
uint32_t flags = in.ReadUInt32();
|
|
dataSavingRequestedByPeer = (flags & INIT_FLAG_DATA_SAVING_ENABLED) == INIT_FLAG_DATA_SAVING_ENABLED;
|
|
UpdateDataSavingState();
|
|
UpdateAudioBitrateLimit();
|
|
ResetEndpointPingStats();
|
|
}
|
|
}
|
|
if (type == PKT_STREAM_EC)
|
|
{
|
|
unsigned char streamID = in.ReadByte();
|
|
if (peerVersion < 7)
|
|
{
|
|
uint32_t lastTimestamp = in.ReadUInt32();
|
|
unsigned char count = in.ReadByte();
|
|
for (shared_ptr<Stream> &stm : incomingStreams)
|
|
{
|
|
if (stm->id == streamID)
|
|
{
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
unsigned char dlen = in.ReadByte();
|
|
unsigned char data[256];
|
|
in.ReadBytes(data, dlen);
|
|
if (stm->jitterBuffer)
|
|
{
|
|
stm->jitterBuffer->HandleInput(data, dlen, lastTimestamp - (count - i) * stm->frameDuration, true);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
shared_ptr<Stream> stm = GetStreamByID(streamID, false);
|
|
if (!stm)
|
|
{
|
|
LOGW("Received FEC packet for unknown stream %u", streamID);
|
|
return;
|
|
}
|
|
if (stm->type != STREAM_TYPE_VIDEO)
|
|
{
|
|
LOGW("Received FEC packet for non-video stream %u", streamID);
|
|
return;
|
|
}
|
|
if (!stm->packetReassembler)
|
|
return;
|
|
|
|
uint8_t fseq = in.ReadByte();
|
|
unsigned char fecScheme = in.ReadByte();
|
|
unsigned char prevFrameCount = in.ReadByte();
|
|
uint16_t fecLen = in.ReadUInt16();
|
|
if (fecLen > in.Remaining())
|
|
return;
|
|
|
|
Buffer fecData(fecLen);
|
|
in.ReadBytes(fecData);
|
|
|
|
stm->packetReassembler->AddFEC(std::move(fecData), fseq, prevFrameCount, fecScheme);
|
|
}
|
|
}
|
|
}
|
|
|
|
void VoIPController::ProcessExtraData(Buffer &data)
|
|
{
|
|
BufferInputStream in(*data, data.Length());
|
|
unsigned char type = in.ReadByte();
|
|
unsigned char fullHash[SHA1_LENGTH];
|
|
crypto.sha1(*data, data.Length(), fullHash);
|
|
uint64_t hash = *reinterpret_cast<uint64_t *>(fullHash);
|
|
if (lastReceivedExtrasByType[type] == hash)
|
|
{
|
|
return;
|
|
}
|
|
LOGE("ProcessExtraData");
|
|
lastReceivedExtrasByType[type] = hash;
|
|
if (type == EXTRA_TYPE_STREAM_FLAGS)
|
|
{
|
|
unsigned char id = in.ReadByte();
|
|
uint32_t flags = in.ReadUInt32();
|
|
LOGV("Peer stream state: id %u flags %u", (unsigned int)id, (unsigned int)flags);
|
|
for (shared_ptr<Stream> &s : incomingStreams)
|
|
{
|
|
if (s->id == id)
|
|
{
|
|
bool prevEnabled = s->enabled;
|
|
bool prevPaused = s->paused;
|
|
s->enabled = (flags & STREAM_FLAG_ENABLED) == STREAM_FLAG_ENABLED;
|
|
s->paused = (flags & STREAM_FLAG_PAUSED) == STREAM_FLAG_PAUSED;
|
|
if (flags & STREAM_FLAG_EXTRA_EC)
|
|
{
|
|
if (!s->extraECEnabled)
|
|
{
|
|
s->extraECEnabled = true;
|
|
if (s->jitterBuffer)
|
|
s->jitterBuffer->SetMinPacketCount(4);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (s->extraECEnabled)
|
|
{
|
|
s->extraECEnabled = false;
|
|
if (s->jitterBuffer)
|
|
s->jitterBuffer->SetMinPacketCount(2);
|
|
}
|
|
}
|
|
if (prevEnabled != s->enabled && s->type == STREAM_TYPE_VIDEO && videoRenderer)
|
|
videoRenderer->SetStreamEnabled(s->enabled);
|
|
if (prevPaused != s->paused && s->type == STREAM_TYPE_VIDEO && videoRenderer)
|
|
videoRenderer->SetStreamPaused(s->paused);
|
|
UpdateAudioOutputState();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (type == EXTRA_TYPE_STREAM_CSD)
|
|
{
|
|
LOGI("Received codec specific data");
|
|
unsigned char streamID = in.ReadByte();
|
|
for (shared_ptr<Stream> &stm : incomingStreams)
|
|
{
|
|
if (stm->id == streamID)
|
|
{
|
|
stm->codecSpecificData.clear();
|
|
stm->csdIsValid = false;
|
|
stm->width = static_cast<unsigned int>(in.ReadInt16());
|
|
stm->height = static_cast<unsigned int>(in.ReadInt16());
|
|
uint8_t count = in.ReadByte();
|
|
for (uint8_t i = 0; i < count; i++)
|
|
{
|
|
size_t len = (size_t)in.ReadByte();
|
|
Buffer csd(len);
|
|
in.ReadBytes(*csd, len);
|
|
stm->codecSpecificData.push_back(move(csd));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (type == EXTRA_TYPE_LAN_ENDPOINT)
|
|
{
|
|
if (!allowP2p)
|
|
return;
|
|
LOGV("received lan endpoint (extra)");
|
|
uint32_t peerAddr = in.ReadUInt32();
|
|
uint16_t peerPort = static_cast<uint16_t>(in.ReadInt32());
|
|
constexpr int64_t lanID = static_cast<int64_t>(FOURCC('L', 'A', 'N', '4')) << 32;
|
|
if (currentEndpoint == lanID)
|
|
currentEndpoint = preferredRelay;
|
|
|
|
unsigned char peerTag[16];
|
|
Endpoint lan(lanID, peerPort, NetworkAddress::IPv4(peerAddr), NetworkAddress::Empty(), Endpoint::Type::UDP_P2P_LAN, peerTag);
|
|
MutexGuard m(endpointsMutex);
|
|
endpoints[lanID] = lan;
|
|
}
|
|
else if (type == EXTRA_TYPE_NETWORK_CHANGED)
|
|
{
|
|
LOGI("Peer network changed");
|
|
wasNetworkHandover = true;
|
|
const Endpoint &_currentEndpoint = endpoints.at(currentEndpoint);
|
|
if (_currentEndpoint.type != Endpoint::Type::UDP_RELAY && _currentEndpoint.type != Endpoint::Type::TCP_RELAY)
|
|
currentEndpoint = preferredRelay;
|
|
if (allowP2p)
|
|
SendPublicEndpointsRequest();
|
|
uint32_t flags = in.ReadUInt32();
|
|
dataSavingRequestedByPeer = (flags & INIT_FLAG_DATA_SAVING_ENABLED) == INIT_FLAG_DATA_SAVING_ENABLED;
|
|
UpdateDataSavingState();
|
|
UpdateAudioBitrateLimit();
|
|
ResetEndpointPingStats();
|
|
}
|
|
else if (type == EXTRA_TYPE_GROUP_CALL_KEY)
|
|
{
|
|
if (!didReceiveGroupCallKey && !didSendGroupCallKey)
|
|
{
|
|
unsigned char groupKey[256];
|
|
in.ReadBytes(groupKey, 256);
|
|
messageThread.Post([this, &groupKey] {
|
|
if (callbacks.groupCallKeyReceived)
|
|
callbacks.groupCallKeyReceived(this, groupKey);
|
|
});
|
|
didReceiveGroupCallKey = true;
|
|
}
|
|
}
|
|
else if (type == EXTRA_TYPE_REQUEST_GROUP)
|
|
{
|
|
if (!didInvokeUpgradeCallback)
|
|
{
|
|
messageThread.Post([this] {
|
|
if (callbacks.upgradeToGroupCallRequested)
|
|
callbacks.upgradeToGroupCallRequested(this);
|
|
});
|
|
didInvokeUpgradeCallback = true;
|
|
}
|
|
}
|
|
else if (type == EXTRA_TYPE_IPV6_ENDPOINT)
|
|
{
|
|
if (!allowP2p)
|
|
return;
|
|
NetworkAddress addr = NetworkAddress::IPv6(in);
|
|
uint16_t port = in.ReadUInt16();
|
|
peerIPv6Available = true;
|
|
LOGV("Received peer IPv6 endpoint [%s]:%u", addr.ToString().c_str(), port);
|
|
|
|
constexpr int64_t p2pID = static_cast<int64_t>(FOURCC('P', '2', 'P', '6')) << 32;
|
|
|
|
Endpoint ep;
|
|
ep.type = Endpoint::Type::UDP_P2P_INET;
|
|
ep.port = port;
|
|
ep.v6address = addr;
|
|
ep.id = p2pID;
|
|
endpoints[p2pID] = ep;
|
|
if (!myIPv6.IsEmpty())
|
|
currentEndpoint = p2pID;
|
|
}
|
|
}
|
|
|
|
void VoIPController::ProcessAcknowledgedOutgoingExtra(UnacknowledgedExtraData &extra)
|
|
{
|
|
if (extra.type == EXTRA_TYPE_GROUP_CALL_KEY)
|
|
{
|
|
if (!didReceiveGroupCallKeyAck)
|
|
{
|
|
didReceiveGroupCallKeyAck = true;
|
|
messageThread.Post([this] {
|
|
if (callbacks.groupCallKeySent)
|
|
callbacks.groupCallKeySent(this);
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
uint8_t VoIPController::WritePacketHeader(PendingOutgoingPacket &pkt, BufferOutputStream &s, PacketSender *source)
|
|
{
|
|
PacketManager &manager = peerVersion >= PROTOCOL_RELIABLE && source ? source->getPacketManager() : packetManager;
|
|
uint32_t acks = manager.getRemoteAckMask();
|
|
|
|
if (peerVersion >= 8 || (!peerVersion && connectionMaxLayer >= 92))
|
|
{
|
|
s.WriteByte(pkt.type);
|
|
s.WriteInt32(manager.getLastRemoteSeq());
|
|
s.WriteInt32(pkt.seq);
|
|
s.WriteInt32(acks);
|
|
|
|
unsigned char flags = currentExtras.empty() ? 0 : XPFLAG_HAS_EXTRA;
|
|
|
|
shared_ptr<Stream> videoStream = GetStreamByType(STREAM_TYPE_VIDEO, false);
|
|
if (peerVersion >= 9 && videoStream && videoStream->enabled)
|
|
flags |= XPFLAG_HAS_RECV_TS;
|
|
|
|
if (peerVersion >= PROTOCOL_RELIABLE && manager.getTransportId() != 0xFF)
|
|
flags |= XPFLAG_HAS_TRANSPORT_ID;
|
|
|
|
s.WriteByte(flags);
|
|
|
|
if (!currentExtras.empty())
|
|
{
|
|
s.WriteByte(static_cast<unsigned char>(currentExtras.size()));
|
|
for (auto &x : currentExtras)
|
|
{
|
|
//LOGV("Writing extra into header: type %u, length %d", x.type, int(x.data.Length()));
|
|
assert(x.data.Length() <= 254);
|
|
s.WriteByte(static_cast<unsigned char>(x.data.Length() + 1));
|
|
s.WriteByte(x.type);
|
|
s.WriteBytes(*x.data, x.data.Length());
|
|
if (x.firstContainingSeq == 0)
|
|
x.firstContainingSeq = pkt.seq;
|
|
}
|
|
}
|
|
if (peerVersion >= 9 && videoStream && videoStream->enabled)
|
|
{
|
|
s.WriteUInt32((lastRecvPacketTime - connectionInitTime) * 1000.0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
legacyWritePacketHeader(pkt.seq, acks, &s, pkt.type, pkt.len);
|
|
}
|
|
|
|
s.WriteBytes(pkt.data);
|
|
|
|
Buffer copyBuf(s.GetLength());
|
|
if (peerVersion >= PROTOCOL_RELIABLE)
|
|
copyBuf.CopyFrom(s.GetBuffer(), 0, s.GetLength());
|
|
|
|
unacknowledgedIncomingPacketCount = 0;
|
|
|
|
auto &recentOutgoingPackets = manager.getRecentOutgoingPackets();
|
|
|
|
recentOutgoingPackets.push_back(RecentOutgoingPacket{
|
|
pkt.endpoint,
|
|
std::move(copyBuf),
|
|
pkt.seq,
|
|
0,
|
|
GetCurrentTime(),
|
|
0,
|
|
0,
|
|
pkt.type,
|
|
static_cast<uint32_t>(pkt.len),
|
|
source,
|
|
false});
|
|
while (recentOutgoingPackets.size() > MAX_RECENT_PACKETS)
|
|
{
|
|
recentOutgoingPackets.erase(recentOutgoingPackets.begin());
|
|
}
|
|
manager.setLastSentSeq(pkt.seq);
|
|
|
|
return manager.getTransportId();
|
|
//LOGI("packet header size %d", s->GetLength());
|
|
} |