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831d646b85
libtgvoip/VoIPController.cpp
Daniil Gentili 831d646b85 Generalize
2017-07-04 14:49:09 +01:00

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//
// libtgvoip is free and unencumbered public domain software.
// For more information, see http://unlicense.org or the UNLICENSE file
// you should have received with this source code distribution.
//
#ifndef _WIN32
#include <unistd.h>
#include <sys/time.h>
#endif
#include <errno.h>
#include <string.h>
#include <wchar.h>
#include "VoIPController.h"
#include "logging.h"
#include "threading.h"
#include "BufferOutputStream.h"
#include "BufferInputStream.h"
#include "OpusEncoder.h"
#include "OpusDecoder.h"
#include "VoIPServerConfig.h"
#include <assert.h>
#include <time.h>
#include <math.h>
#include <exception>
#include <stdexcept>
#include <algorithm>
#define PKT_INIT 1
#define PKT_INIT_ACK 2
#define PKT_STREAM_STATE 3
#define PKT_STREAM_DATA 4
#define PKT_UPDATE_STREAMS 5
#define PKT_PING 6
#define PKT_PONG 7
#define PKT_STREAM_DATA_X2 8
#define PKT_STREAM_DATA_X3 9
#define PKT_LAN_ENDPOINT 10
#define PKT_NETWORK_CHANGED 11
#define PKT_SWITCH_PREF_RELAY 12
#define PKT_SWITCH_TO_P2P 13
#define PKT_NOP 14
#define IS_MOBILE_NETWORK(x) (x==NET_TYPE_GPRS || x==NET_TYPE_EDGE || x==NET_TYPE_3G || x==NET_TYPE_HSPA || x==NET_TYPE_LTE || x==NET_TYPE_OTHER_MOBILE)
#define PROTOCOL_NAME 0x50567247 // "GrVP" in little endian (reversed here)
#define PROTOCOL_VERSION 3
#define MIN_PROTOCOL_VERSION 3
#define STREAM_DATA_FLAG_LEN16 0x40
#define STREAM_DATA_FLAG_HAS_MORE_FLAGS 0x80
#define STREAM_TYPE_AUDIO 1
#define STREAM_TYPE_VIDEO 2
#define CODEC_OPUS 1
/*flags:# voice_call_id:flags.2?int128 in_seq_no:flags.4?int out_seq_no:flags.4?int
* recent_received_mask:flags.5?int proto:flags.3?int extra:flags.1?string raw_data:flags.0?string*/
#define PFLAG_HAS_DATA 1
#define PFLAG_HAS_EXTRA 2
#define PFLAG_HAS_CALL_ID 4
#define PFLAG_HAS_PROTO 8
#define PFLAG_HAS_SEQ 16
#define PFLAG_HAS_RECENT_RECV 32
#define INIT_FLAG_DATA_SAVING_ENABLED 1
#define TLID_DECRYPTED_AUDIO_BLOCK 0xDBF948C1
#define TLID_SIMPLE_AUDIO_BLOCK 0xCC0D0E76
#define TLID_UDP_REFLECTOR_PEER_INFO 0x27D9371C
#define TLID_UDP_REFLECTOR_PEER_INFO_IPV6 0x83fc73b1
#define TLID_UDP_REFLECTOR_SELF_INFO 0xc01572c7
#define PAD4(x) (4-(x+(x<=253 ? 1 : 0))%4)
inline int pad4(int x){
int r=PAD4(x);
if(r==4)
return 0;
return r;
}
using namespace tgvoip;
#ifdef __APPLE__
#include "os/darwin/AudioUnitIO.h"
#include <mach/mach_time.h>
double VoIPController::machTimebase=0;
uint64_t VoIPController::machTimestart=0;
#endif
#ifdef _WIN32
int64_t VoIPController::win32TimeScale = 0;
bool VoIPController::didInitWin32TimeScale = false;
#endif
#define SHA1_LENGTH 20
#define SHA256_LENGTH 32
#ifndef TGVOIP_USE_CUSTOM_CRYPTO
#include <openssl/sha.h>
#include <openssl/aes.h>
#include <openssl/rand.h>
void tgvoip_openssl_aes_ige_encrypt(uint8_t* in, uint8_t* out, size_t length, uint8_t* key, uint8_t* iv){
AES_KEY akey;
AES_set_encrypt_key(key, 32*8, &akey);
AES_ige_encrypt(in, out, length, &akey, iv, AES_ENCRYPT);
}
void tgvoip_openssl_aes_ige_decrypt(uint8_t* in, uint8_t* out, size_t length, uint8_t* key, uint8_t* iv){
AES_KEY akey;
AES_set_decrypt_key(key, 32*8, &akey);
AES_ige_encrypt(in, out, length, &akey, iv, AES_DECRYPT);
}
void tgvoip_openssl_rand_bytes(uint8_t* buffer, size_t len){
RAND_bytes(buffer, len);
}
void tgvoip_openssl_sha1(uint8_t* msg, size_t len, uint8_t* output){
SHA1(msg, len, output);
}
void tgvoip_openssl_sha256(uint8_t* msg, size_t len, uint8_t* output){
SHA256(msg, len, output);
}
void tgvoip_openssl_aes_ctr_encrypt(uint8_t* inout, size_t length, uint8_t* key, uint8_t* iv, uint8_t* ecount, uint32_t* num){
AES_KEY akey;
AES_set_encrypt_key(key, 32*8, &akey);
AES_ctr128_encrypt(inout, inout, length, &akey, iv, ecount, num);
}
voip_crypto_functions_t VoIPController::crypto={
tgvoip_openssl_rand_bytes,
tgvoip_openssl_sha1,
tgvoip_openssl_sha256,
tgvoip_openssl_aes_ige_encrypt,
tgvoip_openssl_aes_ige_decrypt,
tgvoip_openssl_aes_ctr_encrypt
};
#else
voip_crypto_functions_t VoIPController::crypto; // set it yourself upon initialization
#endif
#ifdef _MSC_VER
#define MSC_STACK_FALLBACK(a, b) (b)
#else
#define MSC_STACK_FALLBACK(a, b) (a)
#endif
extern FILE* tgvoipLogFile;
VoIPController::VoIPController() : activeNetItfName(""),
currentAudioInput("default"),
currentAudioOutput("default"),
proxyAddress(""),
proxyUsername(""),
proxyPassword(""),
outgoingPacketsBufferPool(1024, 20){
seq=1;
lastRemoteSeq=0;
state=STATE_WAIT_INIT;
audioInput=NULL;
audioOutput=NULL;
decoder=NULL;
encoder=NULL;
jitterBuffer=NULL;
audioOutStarted=false;
audioTimestampIn=0;
audioTimestampOut=0;
stopping=false;
int i;
sendQueue=new BlockingQueue<PendingOutgoingPacket>(21);
init_mutex(sendBufferMutex);
memset(remoteAcks, 0, sizeof(double)*32);
memset(sentPacketTimes, 0, sizeof(double)*32);
memset(recvPacketTimes, 0, sizeof(double)*32);
memset(rttHistory, 0, sizeof(double)*32);
memset(sendLossCountHistory, 0, sizeof(uint32_t)*32);
memset(&stats, 0, sizeof(voip_stats_t));
lastRemoteAckSeq=0;
lastSentSeq=0;
recvLossCount=0;
packetsRecieved=0;
waitingForAcks=false;
networkType=NET_TYPE_UNKNOWN;
stateCallback=NULL;
echoCanceller=NULL;
dontSendPackets=0;
micMuted=false;
currentEndpoint=NULL;
waitingForRelayPeerInfo=false;
allowP2p=true;
dataSavingMode=false;
publicEndpointsReqTime=0;
init_mutex(queuedPacketsMutex);
init_mutex(endpointsMutex);
connectionInitTime=0;
lastRecvPacketTime=0;
dataSavingRequestedByPeer=false;
peerVersion=0;
conctl=new CongestionControl();
prevSendLossCount=0;
receivedInit=false;
receivedInitAck=false;
peerPreferredRelay=NULL;
statsDump=NULL;
useTCP=false;
useUDP=true;
didAddTcpRelays=false;
setEstablishedAt=0;
udpPingCount=0;
lastUdpPingTime=0;
openingTcpSocket=NULL;
proxyProtocol=PROXY_NONE;
proxyPort=0;
resolvedProxyAddress=NULL;
selectCanceller=SocketSelectCanceller::Create();
udpSocket=NetworkSocket::Create(PROTO_UDP);
realUdpSocket=udpSocket;
udpConnectivityState=UDP_UNKNOWN;
maxAudioBitrate=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_max_bitrate", 20000);
maxAudioBitrateGPRS=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_max_bitrate_gprs", 8000);
maxAudioBitrateEDGE=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_max_bitrate_edge", 16000);
maxAudioBitrateSaving=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_max_bitrate_saving", 8000);
initAudioBitrate=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_init_bitrate", 16000);
initAudioBitrateGPRS=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_init_bitrate_gprs", 8000);
initAudioBitrateEDGE=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_init_bitrate_edge", 8000);
initAudioBitrateSaving=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_init_bitrate_saving", 8000);
audioBitrateStepIncr=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_bitrate_step_incr", 1000);
audioBitrateStepDecr=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_bitrate_step_decr", 1000);
minAudioBitrate=(uint32_t) ServerConfig::GetSharedInstance()->GetInt("audio_min_bitrate", 8000);
relaySwitchThreshold=ServerConfig::GetSharedInstance()->GetDouble("relay_switch_threshold", 0.8);
p2pToRelaySwitchThreshold=ServerConfig::GetSharedInstance()->GetDouble("p2p_to_relay_switch_threshold", 0.6);
relayToP2pSwitchThreshold=ServerConfig::GetSharedInstance()->GetDouble("relay_to_p2p_switch_threshold", 0.8);
reconnectingTimeout=ServerConfig::GetSharedInstance()->GetDouble("reconnecting_state_timeout", 2.0);
#ifdef __APPLE__
machTimestart=0;
#ifdef TGVOIP_USE_AUDIO_SESSION
needNotifyAcquiredAudioSession=false;
#endif
#endif
voip_stream_t* stm=(voip_stream_t *) malloc(sizeof(voip_stream_t));
stm->id=1;
stm->type=STREAM_TYPE_AUDIO;
stm->codec=CODEC_OPUS;
stm->enabled=1;
stm->frameDuration=60;
outgoingStreams.push_back(stm);
}
VoIPController::~VoIPController(){
LOGD("Entered VoIPController::~VoIPController");
if(audioInput)
audioInput->Stop();
if(audioOutput)
audioOutput->Stop();
stopping=true;
runReceiver=false;
LOGD("before shutdown socket");
if(udpSocket)
udpSocket->Close();
if(realUdpSocket!=udpSocket)
realUdpSocket->Close();
selectCanceller->CancelSelect();
sendQueue->Put(PendingOutgoingPacket{0});
if(openingTcpSocket)
openingTcpSocket->Close();
LOGD("before join sendThread");
join_thread(sendThread);
LOGD("before join recvThread");
join_thread(recvThread);
LOGD("before join tickThread");
join_thread(tickThread);
free_mutex(sendBufferMutex);
LOGD("before close socket");
if(udpSocket)
delete udpSocket;
if(udpSocket!=realUdpSocket)
delete realUdpSocket;
LOGD("before delete jitter buffer");
if(jitterBuffer){
delete jitterBuffer;
}
LOGD("before stop decoder");
if(decoder){
decoder->Stop();
}
LOGD("before delete audio input");
if(audioInput){
delete audioInput;
}
LOGD("before delete encoder");
if(encoder){
encoder->Stop();
delete encoder;
}
LOGD("before delete audio output");
if(audioOutput){
delete audioOutput;
}
LOGD("before delete decoder");
if(decoder){
delete decoder;
}
LOGD("before delete echo canceller");
if(echoCanceller){
echoCanceller->Stop();
delete echoCanceller;
}
delete sendQueue;
unsigned int i;
for(i=0;i<incomingStreams.size();i++){
free(incomingStreams[i]);
}
incomingStreams.clear();
for(i=0;i<outgoingStreams.size();i++){
free(outgoingStreams[i]);
}
outgoingStreams.clear();
free_mutex(queuedPacketsMutex);
free_mutex(endpointsMutex);
for(i=0;i<queuedPackets.size();i++){
if(queuedPackets[i]->data)
free(queuedPackets[i]->data);
free(queuedPackets[i]);
}
delete conctl;
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();++itr){
if((*itr)->socket){
(*itr)->socket->Close();
delete (*itr)->socket;
}
delete *itr;
}
if(tgvoipLogFile){
FILE* log=tgvoipLogFile;
tgvoipLogFile=NULL;
fclose(log);
}
if(statsDump)
fclose(statsDump);
if(resolvedProxyAddress)
delete resolvedProxyAddress;
delete selectCanceller;
LOGD("Left VoIPController::~VoIPController");
}
void VoIPController::SetRemoteEndpoints(std::vector<Endpoint> endpoints, bool allowP2p){
LOGW("Set remote endpoints");
preferredRelay=NULL;
size_t i;
lock_mutex(endpointsMutex);
this->endpoints.clear();
didAddTcpRelays=false;
useTCP=true;
for(std::vector<Endpoint>::iterator itrtr=endpoints.begin();itrtr!=endpoints.end();++itrtr){
this->endpoints.push_back(new Endpoint(*itrtr));
if(itrtr->type==EP_TYPE_TCP_RELAY)
didAddTcpRelays=true;
if(itrtr->type==EP_TYPE_UDP_RELAY)
useTCP=false;
LOGV("Adding endpoint: %s:%d, %s", itrtr->address.ToString().c_str(), itrtr->port, itrtr->type==EP_TYPE_UDP_RELAY ? "UDP" : "TCP");
}
unlock_mutex(endpointsMutex);
currentEndpoint=this->endpoints[0];
preferredRelay=currentEndpoint;
this->allowP2p=allowP2p;
}
void* VoIPController::StartRecvThread(void* controller){
((VoIPController*)controller)->RunRecvThread();
return NULL;
}
void* VoIPController::StartSendThread(void* controller){
((VoIPController*)controller)->RunSendThread();
return NULL;
}
void* VoIPController::StartTickThread(void* controller){
((VoIPController*) controller)->RunTickThread();
return NULL;
}
void VoIPController::Start(){
int res;
LOGW("Starting voip controller");
int32_t cfgFrameSize=60; //ServerConfig::GetSharedInstance()->GetInt("audio_frame_size", 60);
if(cfgFrameSize==20 || cfgFrameSize==40 || cfgFrameSize==60)
outgoingStreams[0]->frameDuration=(uint16_t) cfgFrameSize;
udpSocket->Open();
if(udpSocket->IsFailed()){
SetState(STATE_FAILED);
return;
}
//SendPacket(NULL, 0, currentEndpoint);
runReceiver=true;
start_thread(recvThread, StartRecvThread, this);
set_thread_priority(recvThread, get_thread_max_priority());
set_thread_name(recvThread, "voip-recv");
start_thread(sendThread, StartSendThread, this);
set_thread_priority(sendThread, get_thread_max_priority());
set_thread_name(sendThread, "voip-send");
start_thread(tickThread, StartTickThread, this);
set_thread_priority(tickThread, get_thread_max_priority());
set_thread_name(tickThread, "voip-tick");
}
size_t VoIPController::AudioInputCallback(unsigned char* data, size_t length, void* param){
((VoIPController*)param)->HandleAudioInput(data, length);
return 0;
}
void VoIPController::HandleAudioInput(unsigned char *data, size_t len){
if(stopping)
return;
if(waitingForAcks || dontSendPackets>0){
LOGV("waiting for RLC, dropping outgoing audio packet");
return;
}
unsigned char* buf=outgoingPacketsBufferPool.Get();
if(buf){
BufferOutputStream pkt(buf, outgoingPacketsBufferPool.GetSingleBufferSize());
unsigned char flags=(unsigned char) (len>255 ? STREAM_DATA_FLAG_LEN16 : 0);
pkt.WriteByte((unsigned char) (1 | flags)); // streamID + flags
if(len>255)
pkt.WriteInt16((int16_t) len);
else
pkt.WriteByte((unsigned char) len);
pkt.WriteInt32(audioTimestampOut);
pkt.WriteBytes(data, len);
PendingOutgoingPacket p{
/*.seq=*/GenerateOutSeq(),
/*.type=*/PKT_STREAM_DATA,
/*.len=*/pkt.GetLength(),
/*.data=*/buf,
/*.endpoint=*/NULL,
};
sendQueue->Put(p);
}
audioTimestampOut+=outgoingStreams[0]->frameDuration;
}
void VoIPController::Connect(){
assert(state!=STATE_WAIT_INIT_ACK);
if(proxyProtocol==PROXY_SOCKS5){
resolvedProxyAddress=NetworkSocket::ResolveDomainName(proxyAddress);
if(!resolvedProxyAddress){
LOGW("Error resolving proxy address %s", proxyAddress.c_str());
SetState(STATE_FAILED);
return;
}
InitUDPProxy();
}
connectionInitTime=GetCurrentTime();
SendInit();
}
void VoIPController::SetEncryptionKey(char *key, bool isOutgoing){
memcpy(encryptionKey, key, 256);
uint8_t sha1[SHA1_LENGTH];
crypto.sha1((uint8_t*) encryptionKey, 256, sha1);
memcpy(keyFingerprint, sha1+(SHA1_LENGTH-8), 8);
uint8_t sha256[SHA256_LENGTH];
crypto.sha256((uint8_t*) encryptionKey, 256, sha256);
memcpy(callID, sha256+(SHA256_LENGTH-16), 16);
this->isOutgoing=isOutgoing;
}
uint32_t VoIPController::GenerateOutSeq(){
return seq++;
}
void VoIPController::WritePacketHeader(uint32_t pseq, BufferOutputStream *s, unsigned char type, uint32_t length){
uint32_t acks=0;
int i;
for(i=0;i<32;i++){
if(recvPacketTimes[i]>0)
acks|=1;
if(i<31)
acks<<=1;
}
if(state==STATE_WAIT_INIT || state==STATE_WAIT_INIT_ACK){
s->WriteInt32(TLID_DECRYPTED_AUDIO_BLOCK);
int64_t randomID;
crypto.rand_bytes((uint8_t *) &randomID, 8);
s->WriteInt64(randomID);
unsigned char randBytes[7];
crypto.rand_bytes(randBytes, 7);
s->WriteByte(7);
s->WriteBytes(randBytes, 7);
uint32_t pflags=PFLAG_HAS_RECENT_RECV | PFLAG_HAS_SEQ;
if(length>0)
pflags|=PFLAG_HAS_DATA;
if(state==STATE_WAIT_INIT || state==STATE_WAIT_INIT_ACK){
pflags|=PFLAG_HAS_CALL_ID | PFLAG_HAS_PROTO;
}
pflags|=((uint32_t) type) << 24;
s->WriteInt32(pflags);
if(pflags & PFLAG_HAS_CALL_ID){
s->WriteBytes(callID, 16);
}
s->WriteInt32(lastRemoteSeq);
s->WriteInt32(pseq);
s->WriteInt32(acks);
if(pflags & PFLAG_HAS_PROTO){
s->WriteInt32(PROTOCOL_NAME);
}
if(length>0){
if(length<=253){
s->WriteByte((unsigned char) length);
}else{
s->WriteByte(254);
s->WriteByte((unsigned char) (length & 0xFF));
s->WriteByte((unsigned char) ((length >> 8) & 0xFF));
s->WriteByte((unsigned char) ((length >> 16) & 0xFF));
}
}
}else{
s->WriteInt32(TLID_SIMPLE_AUDIO_BLOCK);
int64_t randomID;
crypto.rand_bytes((uint8_t *) &randomID, 8);
s->WriteInt64(randomID);
unsigned char randBytes[7];
crypto.rand_bytes(randBytes, 7);
s->WriteByte(7);
s->WriteBytes(randBytes, 7);
uint32_t lenWithHeader=length+13;
if(lenWithHeader>0){
if(lenWithHeader<=253){
s->WriteByte((unsigned char) lenWithHeader);
}else{
s->WriteByte(254);
s->WriteByte((unsigned char) (lenWithHeader & 0xFF));
s->WriteByte((unsigned char) ((lenWithHeader >> 8) & 0xFF));
s->WriteByte((unsigned char) ((lenWithHeader >> 16) & 0xFF));
}
}
s->WriteByte(type);
s->WriteInt32(lastRemoteSeq);
s->WriteInt32(pseq);
s->WriteInt32(acks);
}
if(type==PKT_STREAM_DATA || type==PKT_STREAM_DATA_X2 || type==PKT_STREAM_DATA_X3)
conctl->PacketSent(pseq, length);
memmove(&sentPacketTimes[1], sentPacketTimes, 31*sizeof(double));
sentPacketTimes[0]=GetCurrentTime();
lastSentSeq=pseq;
//LOGI("packet header size %d", s->GetLength());
}
void VoIPController::UpdateAudioBitrate(){
if(encoder){
if(dataSavingMode || dataSavingRequestedByPeer){
maxBitrate=maxAudioBitrateSaving;
encoder->SetBitrate(initAudioBitrateSaving);
}else if(networkType==NET_TYPE_GPRS){
maxBitrate=maxAudioBitrateGPRS;
encoder->SetBitrate(initAudioBitrateGPRS);
}else if(networkType==NET_TYPE_EDGE){
maxBitrate=maxAudioBitrateEDGE;
encoder->SetBitrate(initAudioBitrateEDGE);
}else{
maxBitrate=maxAudioBitrate;
encoder->SetBitrate(initAudioBitrate);
}
}
}
void VoIPController::SendInit(){
lock_mutex(endpointsMutex);
uint32_t initSeq=GenerateOutSeq();
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();++itr){
if((*itr)->type==EP_TYPE_TCP_RELAY && !useTCP)
continue;
unsigned char* pkt=outgoingPacketsBufferPool.Get();
if(!pkt){
LOGW("can't send init, queue overflow");
continue;
}
BufferOutputStream out(pkt, outgoingPacketsBufferPool.GetSingleBufferSize());
//WritePacketHeader(out, PKT_INIT, 15);
out.WriteInt32(PROTOCOL_VERSION);
out.WriteInt32(MIN_PROTOCOL_VERSION);
uint32_t flags=0;
if(dataSavingMode)
flags|=INIT_FLAG_DATA_SAVING_ENABLED;
out.WriteInt32(flags);
out.WriteByte(1); // audio codecs count
out.WriteByte(CODEC_OPUS);
out.WriteByte(0); // video codecs count
sendQueue->Put(PendingOutgoingPacket{
/*.seq=*/initSeq,
/*.type=*/PKT_INIT,
/*.len=*/out.GetLength(),
/*.data=*/pkt,
/*.endpoint=*/*itr
});
}
unlock_mutex(endpointsMutex);
SetState(STATE_WAIT_INIT_ACK);
}
void VoIPController::InitUDPProxy(){
if(realUdpSocket!=udpSocket){
udpSocket->Close();
delete udpSocket;
udpSocket=realUdpSocket;
}
NetworkSocket* tcp=NetworkSocket::Create(PROTO_TCP);
tcp->Connect(resolvedProxyAddress, proxyPort);
if(tcp->IsFailed()){
SetState(STATE_FAILED);
tcp->Close();
delete tcp;
return;
}
NetworkSocketSOCKS5Proxy* udpProxy=new NetworkSocketSOCKS5Proxy(tcp, udpSocket, proxyUsername, proxyPassword);
udpProxy->InitConnection();
udpProxy->Open();
if(udpProxy->IsFailed()){
udpProxy->Close();
delete udpProxy;
useTCP=true;
useUDP=false;
udpConnectivityState=UDP_NOT_AVAILABLE;
}else{
udpSocket=udpProxy;
}
}
void VoIPController::RunRecvThread(){
LOGI("Receive thread starting");
unsigned char buffer[1024];
NetworkPacket packet;
while(runReceiver){
packet.data=buffer;
packet.length=1024;
std::vector<NetworkSocket*> readSockets;
std::vector<NetworkSocket*> errorSockets;
readSockets.push_back(realUdpSocket);
errorSockets.push_back(realUdpSocket);
//if(useTCP){
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();++itr){
if((*itr)->type==EP_TYPE_TCP_RELAY){
if((*itr)->socket){
readSockets.push_back((*itr)->socket);
errorSockets.push_back((*itr)->socket);
}
}
}
//}
bool selRes=NetworkSocket::Select(readSockets, errorSockets, selectCanceller);
if(!selRes){
LOGV("Select canceled");
continue;
}
if(!runReceiver)
return;
if(!errorSockets.empty()){
if(std::find(errorSockets.begin(), errorSockets.end(), realUdpSocket)!=errorSockets.end()){
LOGW("UDP socket failed");
SetState(STATE_FAILED);
return;
}
}
NetworkSocket* socket=NULL;
if(std::find(readSockets.begin(), readSockets.end(), realUdpSocket)!=readSockets.end()){
socket=udpSocket;
}else if(readSockets.size()>0){
socket=readSockets[0];
}else{
LOGI("no sockets to read from");
lock_mutex(endpointsMutex);
for(std::vector<NetworkSocket*>::iterator itr=errorSockets.begin();itr!=errorSockets.end();++itr){
for(std::vector<Endpoint*>::iterator e=endpoints.begin();e!=endpoints.end();++e){
if((*e)->socket && (*e)->socket==*itr){
(*e)->socket->Close();
delete (*e)->socket;
(*e)->socket=NULL;
LOGI("Closing failed TCP socket for %s:%u", (*e)->address.ToString().c_str(), (*e)->port);
break;
}
}
}
unlock_mutex(endpointsMutex);
continue;
}
socket->Receive(&packet);
if(!packet.address){
LOGE("Packet has null address. This shouldn't happen.");
continue;
}
size_t len=packet.length;
if(!len){
LOGE("Packet has zero length.");
continue;
}
//LOGV("Received %d bytes from %s:%d at %.5lf", len, packet.address->ToString().c_str(), packet.port, GetCurrentTime());
Endpoint* srcEndpoint=NULL;
IPv4Address* src4=dynamic_cast<IPv4Address*>(packet.address);
if(src4){
lock_mutex(endpointsMutex);
for(std::vector<Endpoint*>::iterator itrtr=endpoints.begin();itrtr!=endpoints.end();++itrtr){
if((*itrtr)->address==*src4 && (*itrtr)->port==packet.port){
if(((*itrtr)->type!=EP_TYPE_TCP_RELAY && packet.protocol==PROTO_UDP) || ((*itrtr)->type==EP_TYPE_TCP_RELAY && packet.protocol==PROTO_TCP)){
srcEndpoint=*itrtr;
break;
}
}
}
unlock_mutex(endpointsMutex);
}
if(!srcEndpoint){
LOGW("Received a packet from unknown source %s:%u", packet.address->ToString().c_str(), packet.port);
continue;
}
if(len<=0){
//LOGW("error receiving: %d / %s", errno, strerror(errno));
continue;
}
if(IS_MOBILE_NETWORK(networkType))
stats.bytesRecvdMobile+=(uint64_t)len;
else
stats.bytesRecvdWifi+=(uint64_t)len;
BufferInputStream in(buffer, (size_t)len);
try{
if(memcmp(buffer, srcEndpoint->type==EP_TYPE_UDP_RELAY || srcEndpoint->type==EP_TYPE_TCP_RELAY ? (void*)srcEndpoint->peerTag : (void*)callID, 16)!=0){
LOGW("Received packet has wrong peerTag");
continue;
}
in.Seek(16);
if(in.Remaining()>=16 && (srcEndpoint->type==EP_TYPE_UDP_RELAY || srcEndpoint->type==EP_TYPE_TCP_RELAY)
&& *reinterpret_cast<uint64_t*>(buffer+16)==0xFFFFFFFFFFFFFFFFLL && *reinterpret_cast<uint32_t*>(buffer+24)==0xFFFFFFFF){
// relay special request response
in.Seek(16+12);
uint32_t tlid=(uint32_t) in.ReadInt32();
if(tlid==TLID_UDP_REFLECTOR_SELF_INFO){
if(srcEndpoint->type==EP_TYPE_UDP_RELAY && udpConnectivityState==UDP_PING_SENT && in.Remaining()>=32){
int32_t date=in.ReadInt32();
int64_t queryID=in.ReadInt64();
unsigned char myIP[16];
in.ReadBytes(myIP, 16);
int32_t myPort=in.ReadInt32();
udpConnectivityState=UDP_AVAILABIE;
//LOGV("Received UDP ping reply from %s:%d: date=%d, queryID=%lld, my IP=%s, my port=%d", srcEndpoint->address.ToString().c_str(), srcEndpoint->port, date, queryID, IPv6Address(myIP).ToString().c_str(), myPort);
}
}else if(tlid==TLID_UDP_REFLECTOR_PEER_INFO){
if(waitingForRelayPeerInfo && in.Remaining()>=16){
lock_mutex(endpointsMutex);
uint32_t myAddr=(uint32_t) in.ReadInt32();
uint32_t myPort=(uint32_t) in.ReadInt32();
uint32_t peerAddr=(uint32_t) in.ReadInt32();
uint32_t peerPort=(uint32_t) in.ReadInt32();
for(std::vector<Endpoint *>::iterator itrtr=endpoints.begin(); itrtr!=endpoints.end(); ++itrtr){
Endpoint *ep=*itrtr;
if(ep->type==EP_TYPE_UDP_P2P_INET){
if(currentEndpoint==ep)
currentEndpoint=preferredRelay;
delete ep;
endpoints.erase(itrtr);
break;
}
}
for(std::vector<Endpoint *>::iterator itrtr=endpoints.begin(); itrtr!=endpoints.end(); ++itrtr){
Endpoint *ep=*itrtr;
if(ep->type==EP_TYPE_UDP_P2P_LAN){
if(currentEndpoint==ep)
currentEndpoint=preferredRelay;
delete ep;
endpoints.erase(itrtr);
break;
}
}
IPv4Address _peerAddr(peerAddr);
IPv6Address emptyV6("::0");
unsigned char peerTag[16];
endpoints.push_back(new Endpoint(0, (uint16_t) peerPort, _peerAddr, emptyV6, EP_TYPE_UDP_P2P_INET, peerTag));
LOGW("Received reflector peer info, my=%08X:%u, peer=%08X:%u", myAddr, myPort, peerAddr, peerPort);
if(myAddr==peerAddr){
LOGW("Detected LAN");
IPv4Address lanAddr(0);
udpSocket->GetLocalInterfaceInfo(&lanAddr, NULL);
BufferOutputStream pkt(8);
pkt.WriteInt32(lanAddr.GetAddress());
pkt.WriteInt32(udpSocket->GetLocalPort());
SendPacketReliably(PKT_LAN_ENDPOINT, pkt.GetBuffer(), pkt.GetLength(), 0.5, 10);
}
unlock_mutex(endpointsMutex);
waitingForRelayPeerInfo=false;
}
}else{
LOGV("Received relay response with unknown tl id: 0x%08X", tlid);
}
continue;
}
if(in.Remaining()<40){
LOGV("Received packet is too small");
continue;
}
unsigned char fingerprint[8], msgHash[16];
in.ReadBytes(fingerprint, 8);
in.ReadBytes(msgHash, 16);
if(memcmp(fingerprint, keyFingerprint, 8)!=0){
LOGW("Received packet has wrong key fingerprint");
continue;
}
unsigned char key[32], iv[32];
KDF(msgHash, isOutgoing ? 8 : 0, key, iv);
unsigned char aesOut[MSC_STACK_FALLBACK(in.Remaining(), 1024)];
crypto.aes_ige_decrypt((unsigned char *) buffer+in.GetOffset(), aesOut, in.Remaining(), key, iv);
memcpy(buffer+in.GetOffset(), aesOut, in.Remaining());
unsigned char sha[SHA1_LENGTH];
uint32_t _len=(uint32_t) in.ReadInt32();
if(_len>in.Remaining())
_len=in.Remaining();
crypto.sha1((uint8_t *) (buffer+in.GetOffset()-4), (size_t) (_len+4), sha);
if(memcmp(msgHash, sha+(SHA1_LENGTH-16), 16)!=0){
LOGW("Received packet has wrong hash after decryption");
continue;
}
lastRecvPacketTime=GetCurrentTime();
/*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
* recent_received_mask:flags.5?int proto:flags.3?int extra:flags.1?string raw_data:flags.0?string = DecryptedAudioBlock
simpleAudioBlock random_id:long random_bytes:string raw_data:string = DecryptedAudioBlock;
*/
uint32_t ackId, pseq, acks;
unsigned char type;
uint32_t tlid=(uint32_t) in.ReadInt32();
uint32_t packetInnerLen;
if(tlid==TLID_DECRYPTED_AUDIO_BLOCK){
in.ReadInt64(); // random id
uint32_t randLen=(uint32_t) in.ReadTlLength();
in.Seek(in.GetOffset()+randLen+pad4(randLen));
uint32_t flags=(uint32_t) in.ReadInt32();
type=(unsigned char) ((flags >> 24) & 0xFF);
if(!(flags & PFLAG_HAS_SEQ && flags & PFLAG_HAS_RECENT_RECV)){
LOGW("Received packet doesn't have PFLAG_HAS_SEQ, PFLAG_HAS_RECENT_RECV, or both");
continue;
}
if(flags & PFLAG_HAS_CALL_ID){
unsigned char pktCallID[16];
in.ReadBytes(pktCallID, 16);
if(memcmp(pktCallID, callID, 16)!=0){
LOGW("Received packet has wrong call id");
lastError=TGVOIP_ERROR_UNKNOWN;
SetState(STATE_FAILED);
return;
}
}
ackId=(uint32_t) in.ReadInt32();
pseq=(uint32_t) in.ReadInt32();
acks=(uint32_t) in.ReadInt32();
if(flags & PFLAG_HAS_PROTO){
uint32_t proto=(uint32_t) in.ReadInt32();
if(proto!=PROTOCOL_NAME){
LOGW("Received packet uses wrong protocol");
lastError=TGVOIP_ERROR_INCOMPATIBLE;
SetState(STATE_FAILED);
return;
}
}
if(flags & PFLAG_HAS_EXTRA){
uint32_t extraLen=(uint32_t) in.ReadTlLength();
in.Seek(in.GetOffset()+extraLen+pad4(extraLen));
}
if(flags & PFLAG_HAS_DATA){
packetInnerLen=in.ReadTlLength();
}
}else if(tlid==TLID_SIMPLE_AUDIO_BLOCK){
in.ReadInt64(); // random id
uint32_t randLen=(uint32_t) in.ReadTlLength();
in.Seek(in.GetOffset()+randLen+pad4(randLen));
packetInnerLen=in.ReadTlLength();
type=in.ReadByte();
ackId=(uint32_t) in.ReadInt32();
pseq=(uint32_t) in.ReadInt32();
acks=(uint32_t) in.ReadInt32();
}else{
LOGW("Received a packet of unknown type %08X", tlid);
continue;
}
packetsRecieved++;
if(seqgt(pseq, lastRemoteSeq)){
uint32_t diff=pseq-lastRemoteSeq;
if(diff>31){
memset(recvPacketTimes, 0, 32*sizeof(double));
}else{
memmove(&recvPacketTimes[diff], recvPacketTimes, (32-diff)*sizeof(double));
if(diff>1){
memset(recvPacketTimes, 0, diff*sizeof(double));
}
recvPacketTimes[0]=GetCurrentTime();
}
lastRemoteSeq=pseq;
}else if(!seqgt(pseq, lastRemoteSeq) && lastRemoteSeq-pseq<32){
if(recvPacketTimes[lastRemoteSeq-pseq]!=0){
LOGW("Received duplicated packet for seq %u", pseq);
continue;
}
recvPacketTimes[lastRemoteSeq-pseq]=GetCurrentTime();
}else if(lastRemoteSeq-pseq>=32){
LOGW("Packet %u is out of order and too late", pseq);
continue;
}
if(seqgt(ackId, lastRemoteAckSeq)){
uint32_t diff=ackId-lastRemoteAckSeq;
if(diff>31){
memset(remoteAcks, 0, 32*sizeof(double));
}else{
memmove(&remoteAcks[diff], remoteAcks, (32-diff)*sizeof(double));
if(diff>1){
memset(remoteAcks, 0, diff*sizeof(double));
}
remoteAcks[0]=GetCurrentTime();
}
if(waitingForAcks && lastRemoteAckSeq>=firstSentPing){
memset(rttHistory, 0, 32*sizeof(double));
waitingForAcks=false;
dontSendPackets=10;
LOGI("resuming sending");
}
lastRemoteAckSeq=ackId;
conctl->PacketAcknowledged(ackId);
int i;
for(i=0;i<31;i++){
if(remoteAcks[i+1]==0){
if((acks >> (31-i)) & 1){
remoteAcks[i+1]=GetCurrentTime();
conctl->PacketAcknowledged(ackId-(i+1));
}
}
}
lock_mutex(queuedPacketsMutex);
for(i=0;i<queuedPackets.size();i++){
voip_queued_packet_t* qp=queuedPackets[i];
int j;
bool didAck=false;
for(j=0;j<16;j++){
LOGD("queued packet %u, seq %u=%u", i, j, qp->seqs[j]);
if(qp->seqs[j]==0)
break;
int remoteAcksIndex=lastRemoteAckSeq-qp->seqs[j];
LOGV("remote acks index %u, value %f", remoteAcksIndex, remoteAcksIndex>=0 && remoteAcksIndex<32 ? remoteAcks[remoteAcksIndex] : -1);
if(seqgt(lastRemoteAckSeq, qp->seqs[j]) && remoteAcksIndex>=0 && remoteAcksIndex<32 && remoteAcks[remoteAcksIndex]>0){
LOGD("did ack seq %u, removing", qp->seqs[j]);
didAck=true;
break;
}
}
if(didAck){
if(qp->data)
free(qp->data);
free(qp);
queuedPackets.erase(queuedPackets.begin()+i);
i--;
continue;
}
}
unlock_mutex(queuedPacketsMutex);
}
if(srcEndpoint!=currentEndpoint && (srcEndpoint->type==EP_TYPE_UDP_RELAY || srcEndpoint->type==EP_TYPE_TCP_RELAY) && ((currentEndpoint->type!=EP_TYPE_UDP_RELAY && currentEndpoint->type!=EP_TYPE_TCP_RELAY) || currentEndpoint->averageRTT==0)){
if(seqgt(lastSentSeq-32, lastRemoteAckSeq)){
currentEndpoint=srcEndpoint;
LOGI("Peer network address probably changed, switching to relay");
if(allowP2p)
SendPublicEndpointsRequest();
}
}
//LOGV("acks: %u -> %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf", lastRemoteAckSeq, remoteAcks[0], remoteAcks[1], remoteAcks[2], remoteAcks[3], remoteAcks[4], remoteAcks[5], remoteAcks[6], remoteAcks[7]);
//LOGD("recv: %u -> %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf, %.2lf", lastRemoteSeq, recvPacketTimes[0], recvPacketTimes[1], recvPacketTimes[2], recvPacketTimes[3], recvPacketTimes[4], recvPacketTimes[5], recvPacketTimes[6], recvPacketTimes[7]);
//LOGI("RTT = %.3lf", GetAverageRTT());
//LOGV("Packet %u type is %d", pseq, type);
if(type==PKT_INIT){
LOGD("Received init");
if(!receivedInit){
receivedInit=true;
currentEndpoint=srcEndpoint;
if(srcEndpoint->type==EP_TYPE_UDP_RELAY || (useTCP && srcEndpoint->type==EP_TYPE_TCP_RELAY))
preferredRelay=srcEndpoint;
LogDebugInfo();
}
peerVersion=(uint32_t) in.ReadInt32();
LOGI("Peer version is %d", peerVersion);
uint32_t minVer=(uint32_t) in.ReadInt32();
if(minVer>PROTOCOL_VERSION || peerVersion<MIN_PROTOCOL_VERSION){
lastError=TGVOIP_ERROR_INCOMPATIBLE;
SetState(STATE_FAILED);
return;
}
uint32_t flags=(uint32_t) in.ReadInt32();
if(flags & INIT_FLAG_DATA_SAVING_ENABLED){
dataSavingRequestedByPeer=true;
UpdateDataSavingState();
UpdateAudioBitrate();
}
int i;
int numSupportedAudioCodecs=in.ReadByte();
for(i=0; i<numSupportedAudioCodecs; i++){
in.ReadByte(); // ignore for now
}
int numSupportedVideoCodecs=in.ReadByte();
for(i=0; i<numSupportedVideoCodecs; i++){
in.ReadByte(); // ignore for now
}
unsigned char* buf=outgoingPacketsBufferPool.Get();
if(buf){
BufferOutputStream out(buf, outgoingPacketsBufferPool.GetSingleBufferSize());
//WritePacketHeader(out, PKT_INIT_ACK, (peerVersion>=2 ? 10 : 2)+(peerVersion>=2 ? 6 : 4)*outgoingStreams.size());
out.WriteInt32(PROTOCOL_VERSION);
out.WriteInt32(MIN_PROTOCOL_VERSION);
out.WriteByte((unsigned char) outgoingStreams.size());
for(i=0; i<outgoingStreams.size(); i++){
out.WriteByte(outgoingStreams[i]->id);
out.WriteByte(outgoingStreams[i]->type);
out.WriteByte(outgoingStreams[i]->codec);
out.WriteInt16(outgoingStreams[i]->frameDuration);
out.WriteByte((unsigned char) (outgoingStreams[i]->enabled ? 1 : 0));
}
sendQueue->Put(PendingOutgoingPacket{
/*.seq=*/GenerateOutSeq(),
/*.type=*/PKT_INIT_ACK,
/*.len=*/out.GetLength(),
/*.data=*/buf,
/*.endpoint=*/NULL
});
}
}
if(type==PKT_INIT_ACK){
LOGD("Received init ack");
if(!receivedInitAck){
receivedInitAck=true;
if(packetInnerLen>10){
peerVersion=in.ReadInt32();
uint32_t minVer=(uint32_t) in.ReadInt32();
if(minVer>PROTOCOL_VERSION || peerVersion<MIN_PROTOCOL_VERSION){
lastError=TGVOIP_ERROR_INCOMPATIBLE;
SetState(STATE_FAILED);
return;
}
}else{
peerVersion=1;
}
LOGI("peer version from init ack %d", peerVersion);
unsigned char streamCount=in.ReadByte();
if(streamCount==0)
continue;
int i;
voip_stream_t *incomingAudioStream=NULL;
for(i=0; i<streamCount; i++){
voip_stream_t *stm=(voip_stream_t *) malloc(sizeof(voip_stream_t));
stm->id=in.ReadByte();
stm->type=in.ReadByte();
stm->codec=in.ReadByte();
if(peerVersion>=2)
stm->frameDuration=(uint16_t) in.ReadInt16();
else
stm->frameDuration=20;
stm->enabled=in.ReadByte()==1;
incomingStreams.push_back(stm);
if(stm->type==STREAM_TYPE_AUDIO && !incomingAudioStream)
incomingAudioStream=stm;
}
if(!incomingAudioStream)
continue;
voip_stream_t *outgoingAudioStream=outgoingStreams[0];
if(!audioInput){
LOGI("before create audio io");
audioInput=tgvoip::audio::AudioInput::Create(currentAudioInput, this);
audioInput->Configure(48000, 16, 1);
audioOutput=tgvoip::audio::AudioOutput::Create(currentAudioOutput, this);
audioOutput->Configure(48000, 16, 1);
echoCanceller=new EchoCanceller(config.enableAEC, config.enableNS, config.enableAGC);
encoder=new OpusEncoder(audioInput);
encoder->SetCallback(AudioInputCallback, this);
encoder->SetOutputFrameDuration(outgoingAudioStream->frameDuration);
encoder->SetEchoCanceller(echoCanceller);
encoder->Start();
if(!micMuted){
audioInput->Start();
if(!audioInput->IsInitialized()){
LOGE("Erorr initializing audio capture");
lastError=TGVOIP_ERROR_AUDIO_IO;
SetState(STATE_FAILED);
return;
}
}
if(!audioOutput->IsInitialized()){
LOGE("Erorr initializing audio playback");
lastError=TGVOIP_ERROR_AUDIO_IO;
SetState(STATE_FAILED);
return;
}
UpdateAudioBitrate();
jitterBuffer=new JitterBuffer(NULL, incomingAudioStream->frameDuration);
decoder=new OpusDecoder(audioOutput);
decoder->SetEchoCanceller(echoCanceller);
decoder->SetJitterBuffer(jitterBuffer);
decoder->SetFrameDuration(incomingAudioStream->frameDuration);
decoder->Start();
if(incomingAudioStream->frameDuration>50)
jitterBuffer->SetMinPacketCount((uint32_t) ServerConfig::GetSharedInstance()->GetInt("jitter_initial_delay_60", 3));
else if(incomingAudioStream->frameDuration>30)
jitterBuffer->SetMinPacketCount((uint32_t) ServerConfig::GetSharedInstance()->GetInt("jitter_initial_delay_40", 4));
else
jitterBuffer->SetMinPacketCount((uint32_t) ServerConfig::GetSharedInstance()->GetInt("jitter_initial_delay_20", 6));
//audioOutput->Start();
#ifdef TGVOIP_USE_AUDIO_SESSION
#ifdef __APPLE__
if(acquireAudioSession){
acquireAudioSession(^(){
LOGD("Audio session acquired");
needNotifyAcquiredAudioSession=true;
});
}else{
audio::AudioUnitIO::AudioSessionAcquired();
}
#endif
#endif
}
setEstablishedAt=GetCurrentTime()+ServerConfig::GetSharedInstance()->GetDouble("established_delay_if_no_stream_data", 1.5);
if(allowP2p)
SendPublicEndpointsRequest();
}
}
if(type==PKT_STREAM_DATA || type==PKT_STREAM_DATA_X2 || type==PKT_STREAM_DATA_X3){
if(state!=STATE_ESTABLISHED && receivedInitAck)
SetState(STATE_ESTABLISHED);
int count;
switch(type){
case PKT_STREAM_DATA_X2:
count=2;
break;
case PKT_STREAM_DATA_X3:
count=3;
break;
case PKT_STREAM_DATA:
default:
count=1;
break;
}
int i;
if(srcEndpoint->type==EP_TYPE_UDP_RELAY && srcEndpoint!=peerPreferredRelay){
peerPreferredRelay=srcEndpoint;
}
for(i=0;i<count;i++){
unsigned char streamID=in.ReadByte();
unsigned char flags=(unsigned char) (streamID & 0xC0);
uint16_t sdlen=(uint16_t) (flags & STREAM_DATA_FLAG_LEN16 ? in.ReadInt16() : in.ReadByte());
uint32_t pts=(uint32_t) in.ReadInt32();
//LOGD("stream data, pts=%d, len=%d, rem=%d", pts, sdlen, in.Remaining());
audioTimestampIn=pts;
if(!audioOutStarted && audioOutput){
audioOutput->Start();
audioOutStarted=true;
}
if(jitterBuffer)
jitterBuffer->HandleInput((unsigned char*) (buffer+in.GetOffset()), sdlen, pts);
if(i<count-1)
in.Seek(in.GetOffset()+sdlen);
}
}
if(type==PKT_PING){
LOGD("Received ping from %s:%d", packet.address->ToString().c_str(), srcEndpoint->port);
if(srcEndpoint->type!=EP_TYPE_UDP_RELAY && srcEndpoint->type!=EP_TYPE_TCP_RELAY && !allowP2p){
LOGW("Received p2p ping but p2p is disabled by manual override");
continue;
}
unsigned char* buf=outgoingPacketsBufferPool.Get();
if(!buf){
LOGW("Dropping pong packet, queue overflow");
continue;
}
BufferOutputStream pkt(buf, outgoingPacketsBufferPool.GetSingleBufferSize());
pkt.WriteInt32(pseq);
sendQueue->Put(PendingOutgoingPacket{
/*.seq=*/GenerateOutSeq(),
/*.type=*/PKT_PONG,
/*.len=*/pkt.GetLength(),
/*.data=*/buf,
/*.endpoint=*/srcEndpoint,
});
}
if(type==PKT_PONG){
if(packetInnerLen>=4){
uint32_t pingSeq=(uint32_t) in.ReadInt32();
if(pingSeq==srcEndpoint->lastPingSeq){
memmove(&srcEndpoint->rtts[1], srcEndpoint->rtts, sizeof(double)*5);
srcEndpoint->rtts[0]=GetCurrentTime()-srcEndpoint->lastPingTime;
int i;
srcEndpoint->averageRTT=0;
for(i=0;i<6;i++){
if(srcEndpoint->rtts[i]==0)
break;
srcEndpoint->averageRTT+=srcEndpoint->rtts[i];
}
srcEndpoint->averageRTT/=i;
LOGD("Current RTT via %s: %.3f, average: %.3f", packet.address->ToString().c_str(), srcEndpoint->rtts[0], srcEndpoint->averageRTT);
}
}
/*if(currentEndpoint!=srcEndpoint && (srcEndpoint->type==EP_TYPE_UDP_P2P_INET || srcEndpoint->type==EP_TYPE_UDP_P2P_LAN)){
LOGI("Switching to P2P now!");
currentEndpoint=srcEndpoint;
needSendP2pPing=false;
}*/
}
if(type==PKT_STREAM_STATE){
unsigned char id=in.ReadByte();
unsigned char enabled=in.ReadByte();
int i;
for(i=0;i<incomingStreams.size();i++){
if(incomingStreams[i]->id==id){
incomingStreams[i]->enabled=enabled==1;
UpdateAudioOutputState();
break;
}
}
}
if(type==PKT_LAN_ENDPOINT){
LOGV("received lan endpoint");
uint32_t peerAddr=(uint32_t) in.ReadInt32();
uint16_t peerPort=(uint16_t) in.ReadInt32();
lock_mutex(endpointsMutex);
for(std::vector<Endpoint*>::iterator itrtr=endpoints.begin();itrtr!=endpoints.end();++itrtr){
if((*itrtr)->type==EP_TYPE_UDP_P2P_LAN){
if(currentEndpoint==*itrtr)
currentEndpoint=preferredRelay;
delete *itrtr;
endpoints.erase(itrtr);
break;
}
}
IPv4Address v4addr(peerAddr);
IPv6Address v6addr("::0");
unsigned char peerTag[16];
endpoints.push_back(new Endpoint(0, peerPort, v4addr, v6addr, EP_TYPE_UDP_P2P_LAN, peerTag));
unlock_mutex(endpointsMutex);
}
if(type==PKT_NETWORK_CHANGED && currentEndpoint->type!=EP_TYPE_UDP_RELAY && currentEndpoint->type!=EP_TYPE_TCP_RELAY){
currentEndpoint=preferredRelay;
if(allowP2p)
SendPublicEndpointsRequest();
if(peerVersion>=2){
uint32_t flags=(uint32_t) in.ReadInt32();
dataSavingRequestedByPeer=(flags & INIT_FLAG_DATA_SAVING_ENABLED)==INIT_FLAG_DATA_SAVING_ENABLED;
UpdateDataSavingState();
UpdateAudioBitrate();
}
}
}catch(std::out_of_range x){
LOGW("Error parsing packet: %s", x.what());
}
}
LOGI("=== recv thread exiting ===");
}
void VoIPController::RunSendThread(){
unsigned char buf[1500];
while(runReceiver){
PendingOutgoingPacket pkt=sendQueue->GetBlocking();
if(pkt.data){
lock_mutex(endpointsMutex);
Endpoint *endpoint=pkt.endpoint ? pkt.endpoint : currentEndpoint;
if((endpoint->type==EP_TYPE_TCP_RELAY && useTCP) || (endpoint->type!=EP_TYPE_TCP_RELAY && useUDP)){
BufferOutputStream p(buf, sizeof(buf));
WritePacketHeader(pkt.seq, &p, pkt.type, pkt.len);
p.WriteBytes(pkt.data, pkt.len);
SendPacket(p.GetBuffer(), p.GetLength(), endpoint);
}
unlock_mutex(endpointsMutex);
outgoingPacketsBufferPool.Reuse(pkt.data);
}else{
LOGE("tried to send null packet");
}
}
LOGI("=== send thread exiting ===");
}
void VoIPController::RunTickThread(){
uint32_t tickCount=0;
bool wasWaitingForAcks=false;
double startTime=GetCurrentTime();
while(runReceiver){
#ifndef _WIN32
usleep(100000);
#else
Sleep(100);
#endif
tickCount++;
if(connectionInitTime==0)
continue;
double time=GetCurrentTime();
if(tickCount%5==0 && (state==STATE_ESTABLISHED || state==STATE_RECONNECTING)){
memmove(&rttHistory[1], rttHistory, 31*sizeof(double));
rttHistory[0]=GetAverageRTT();
/*if(rttHistory[16]>0){
LOGI("rtt diff: %.3lf", rttHistory[0]-rttHistory[16]);
}*/
int i;
double v=0;
for(i=1;i<32;i++){
v+=rttHistory[i-1]-rttHistory[i];
}
v=v/32;
if(rttHistory[0]>10.0 && rttHistory[8]>10.0 && (networkType==NET_TYPE_EDGE || networkType==NET_TYPE_GPRS)){
waitingForAcks=true;
}else{
waitingForAcks=false;
}
if(waitingForAcks)
wasWaitingForAcks=false;
//LOGI("%.3lf/%.3lf, rtt diff %.3lf, waiting=%d, queue=%d", rttHistory[0], rttHistory[8], v, waitingForAcks, sendQueue->Size());
if(jitterBuffer){
int lostCount=jitterBuffer->GetAndResetLostPacketCount();
if(lostCount>0 || (lostCount<0 && recvLossCount>((uint32_t)-lostCount)))
recvLossCount+=lostCount;
}
}
if(dontSendPackets>0)
dontSendPackets--;
int i;
conctl->Tick();
if(useTCP && !didAddTcpRelays){
std::vector<Endpoint *> relays;
for(std::vector<Endpoint *>::iterator itr=endpoints.begin(); itr!=endpoints.end(); ++itr){
if((*itr)->type!=EP_TYPE_UDP_RELAY)
continue;
Endpoint *tcpRelay=new Endpoint(**itr);
tcpRelay->type=EP_TYPE_TCP_RELAY;
tcpRelay->averageRTT=0;
tcpRelay->lastPingSeq=0;
tcpRelay->lastPingTime=0;
memset(tcpRelay->rtts, 0, sizeof(tcpRelay->rtts));
relays.push_back(tcpRelay);
}
endpoints.insert(endpoints.end(), relays.begin(), relays.end());
didAddTcpRelays=true;
}
if(state==STATE_ESTABLISHED && encoder && conctl){
if((audioInput && !audioInput->IsInitialized()) || (audioOutput && !audioOutput->IsInitialized())){
LOGE("Audio I/O failed");
lastError=TGVOIP_ERROR_AUDIO_IO;
SetState(STATE_FAILED);
}
int act=conctl->GetBandwidthControlAction();
if(act==TGVOIP_CONCTL_ACT_DECREASE){
uint32_t bitrate=encoder->GetBitrate();
if(bitrate>8000)
encoder->SetBitrate(bitrate<(minAudioBitrate+audioBitrateStepDecr) ? minAudioBitrate : (bitrate-audioBitrateStepDecr));
}else if(act==TGVOIP_CONCTL_ACT_INCREASE){
uint32_t bitrate=encoder->GetBitrate();
if(bitrate<maxBitrate)
encoder->SetBitrate(bitrate+audioBitrateStepIncr);
}
if(tickCount%10==0 && encoder){
uint32_t sendLossCount=conctl->GetSendLossCount();
memmove(sendLossCountHistory+1, sendLossCountHistory, 31*sizeof(uint32_t));
sendLossCountHistory[0]=sendLossCount-prevSendLossCount;
prevSendLossCount=sendLossCount;
double avgSendLossCount=0;
for(i=0;i<10;i++){
avgSendLossCount+=sendLossCountHistory[i];
}
double packetsPerSec=1000/(double)outgoingStreams[0]->frameDuration;
avgSendLossCount=avgSendLossCount/10/packetsPerSec;
//LOGV("avg send loss: %.1f%%", avgSendLossCount*100);
if(avgSendLossCount>0.1){
encoder->SetPacketLoss(40);
}else if(avgSendLossCount>0.075){
encoder->SetPacketLoss(35);
}else if(avgSendLossCount>0.0625){
encoder->SetPacketLoss(30);
}else if(avgSendLossCount>0.05){
encoder->SetPacketLoss(25);
}else if(avgSendLossCount>0.025){
encoder->SetPacketLoss(20);
}else if(avgSendLossCount>0.01){
encoder->SetPacketLoss(17);
}else{
encoder->SetPacketLoss(15);
}
}
}
bool areThereAnyEnabledStreams=false;
for(i=0;i<outgoingStreams.size();i++){
if(outgoingStreams[i]->enabled)
areThereAnyEnabledStreams=true;
}
if((waitingForAcks && tickCount%10==0) || (!areThereAnyEnabledStreams && tickCount%2==0)){
unsigned char* buf=outgoingPacketsBufferPool.Get();
if(buf){
sendQueue->Put(PendingOutgoingPacket{
/*.seq=*/(firstSentPing=GenerateOutSeq()),
/*.type=*/PKT_NOP,
/*.len=*/0,
/*.data=*/buf,
/*.endpoint=*/NULL
});
}
}
if(state==STATE_WAIT_INIT_ACK && GetCurrentTime()-stateChangeTime>.5){
SendInit();
}
if(waitingForRelayPeerInfo && GetCurrentTime()-publicEndpointsReqTime>5){
LOGD("Resending peer relay info request");
SendPublicEndpointsRequest();
}
lock_mutex(queuedPacketsMutex);
for(i=0;i<queuedPackets.size();i++){
voip_queued_packet_t* qp=queuedPackets[i];
if(qp->timeout>0 && qp->firstSentTime>0 && GetCurrentTime()-qp->firstSentTime>=qp->timeout){
LOGD("Removing queued packet because of timeout");
if(qp->data)
free(qp->data);
free(qp);
queuedPackets.erase(queuedPackets.begin()+i);
i--;
continue;
}
if(GetCurrentTime()-qp->lastSentTime>=qp->retryInterval){
unsigned char* buf=outgoingPacketsBufferPool.Get();
if(buf){
uint32_t seq=GenerateOutSeq();
memmove(&qp->seqs[1], qp->seqs, 4*9);
qp->seqs[0]=seq;
qp->lastSentTime=GetCurrentTime();
LOGD("Sending queued packet, seq=%u, type=%u, len=%u", seq, qp->type, unsigned(qp->length));
if(qp->firstSentTime==0)
qp->firstSentTime=qp->lastSentTime;
if(qp->length)
memcpy(buf, qp->data, qp->length);
sendQueue->Put(PendingOutgoingPacket{
/*.seq=*/seq,
/*.type=*/qp->type,
/*.len=*/qp->length,
/*.data=*/buf,
/*.endpoint=*/NULL
});
}
}
}
unlock_mutex(queuedPacketsMutex);
if(jitterBuffer)
jitterBuffer->Tick();
lock_mutex(endpointsMutex);
if(state==STATE_ESTABLISHED || state==STATE_RECONNECTING){
Endpoint* minPingRelay=preferredRelay;
double minPing=preferredRelay->averageRTT;
for(std::vector<Endpoint*>::iterator e=endpoints.begin();e!=endpoints.end();++e){
Endpoint* endpoint=*e;
if(endpoint->type==EP_TYPE_TCP_RELAY && !useTCP)
continue;
if(GetCurrentTime()-endpoint->lastPingTime>=10){
LOGV("Sending ping to %s", endpoint->address.ToString().c_str());
unsigned char* buf=outgoingPacketsBufferPool.Get();
if(buf){
sendQueue->Put(PendingOutgoingPacket{
/*.seq=*/(endpoint->lastPingSeq=GenerateOutSeq()),
/*.type=*/PKT_PING,
/*.len=*/0,
/*.data=*/buf,
/*.endpoint=*/endpoint
});
}
endpoint->lastPingTime=GetCurrentTime();
}
if(endpoint->type==EP_TYPE_UDP_RELAY || (useTCP && endpoint->type==EP_TYPE_TCP_RELAY)){
double k=endpoint->type==EP_TYPE_UDP_RELAY ? 1 : 2;
if(endpoint->averageRTT>0 && endpoint->averageRTT*k<minPing*relaySwitchThreshold){
minPing=endpoint->averageRTT*k;
minPingRelay=endpoint;
}
}
}
if(minPingRelay!=preferredRelay){
preferredRelay=minPingRelay;
LOGV("set preferred relay to %s", preferredRelay->address.ToString().c_str());
if(currentEndpoint->type==EP_TYPE_UDP_RELAY || currentEndpoint->type==EP_TYPE_TCP_RELAY)
currentEndpoint=preferredRelay;
LogDebugInfo();
/*BufferOutputStream pkt(32);
pkt.WriteInt64(preferredRelay->id);
SendPacketReliably(PKT_SWITCH_PREF_RELAY, pkt.GetBuffer(), pkt.GetLength(), 1, 9);*/
}
if(currentEndpoint->type==EP_TYPE_UDP_RELAY){
Endpoint* p2p=GetEndpointByType(EP_TYPE_UDP_P2P_INET);
if(p2p){
Endpoint* lan=GetEndpointByType(EP_TYPE_UDP_P2P_LAN);
if(lan && lan->averageRTT>0 && lan->averageRTT<minPing*relayToP2pSwitchThreshold){
//SendPacketReliably(PKT_SWITCH_TO_P2P, NULL, 0, 1, 5);
currentEndpoint=lan;
LOGI("Switching to p2p (LAN)");
LogDebugInfo();
}else{
if(p2p->averageRTT>0 && p2p->averageRTT<minPing*relayToP2pSwitchThreshold){
//SendPacketReliably(PKT_SWITCH_TO_P2P, NULL, 0, 1, 5);
currentEndpoint=p2p;
LOGI("Switching to p2p (Inet)");
LogDebugInfo();
}
}
}
}else{
if(minPing>0 && minPing<currentEndpoint->averageRTT*p2pToRelaySwitchThreshold){
LOGI("Switching to relay");
currentEndpoint=preferredRelay;
LogDebugInfo();
}
}
}
if(udpConnectivityState==UDP_UNKNOWN){
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();++itr){
if((*itr)->type==EP_TYPE_UDP_RELAY){
SendUdpPing(*itr);
}
}
udpConnectivityState=UDP_PING_SENT;
lastUdpPingTime=time;
udpPingCount=1;
}else if(udpConnectivityState==UDP_PING_SENT){
if(time-lastUdpPingTime>=0.5){
if(udpPingCount<4){
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();++itr){
if((*itr)->type==EP_TYPE_UDP_RELAY){
SendUdpPing(*itr);
}
}
udpPingCount++;
lastUdpPingTime=time;
}else{
LOGW("No UDP ping replies received; assuming no connectivity and trying TCP")
udpConnectivityState=UDP_NOT_AVAILABLE;
useTCP=true;
}
}
}
unlock_mutex(endpointsMutex);
if(state==STATE_ESTABLISHED || state==STATE_RECONNECTING){
if(time-lastRecvPacketTime>=config.recv_timeout){
if(currentEndpoint && currentEndpoint->type!=EP_TYPE_UDP_RELAY && currentEndpoint->type!=EP_TYPE_TCP_RELAY){
LOGW("Packet receive timeout, switching to relay");
currentEndpoint=preferredRelay;
for(std::vector<Endpoint*>::iterator itrtr=endpoints.begin();itrtr!=endpoints.end();++itrtr){
Endpoint* e=*itrtr;
if(e->type==EP_TYPE_UDP_P2P_INET || e->type==EP_TYPE_UDP_P2P_LAN){
e->averageRTT=0;
memset(e->rtts, 0, sizeof(e->rtts));
}
}
if(allowP2p){
SendPublicEndpointsRequest();
}
UpdateDataSavingState();
UpdateAudioBitrate();
BufferOutputStream s(4);
s.WriteInt32(dataSavingMode ? INIT_FLAG_DATA_SAVING_ENABLED : 0);
SendPacketReliably(PKT_NETWORK_CHANGED, s.GetBuffer(), s.GetLength(), 1, 20);
lastRecvPacketTime=time;
}else{
LOGW("Packet receive timeout, disconnecting");
lastError=TGVOIP_ERROR_TIMEOUT;
SetState(STATE_FAILED);
}
}
}else if(state==STATE_WAIT_INIT || state==STATE_WAIT_INIT_ACK){
if(GetCurrentTime()-connectionInitTime>=config.init_timeout){
LOGW("Init timeout, disconnecting");
lastError=TGVOIP_ERROR_TIMEOUT;
SetState(STATE_FAILED);
}
}
if(state==STATE_ESTABLISHED && time-lastRecvPacketTime>=reconnectingTimeout){
SetState(STATE_RECONNECTING);
}
if(state!=STATE_ESTABLISHED && setEstablishedAt>0 && time>=setEstablishedAt){
SetState(STATE_ESTABLISHED);
setEstablishedAt=0;
}
if(statsDump){
//fprintf(statsDump, "Time\tRTT\tLISeq\tLASeq\tCWnd\tBitrate\tJitter\tJDelay\tAJDelay\n");
fprintf(statsDump, "%.3f\t%.3f\t%d\t%d\t%d\t%d\t%d\t%d\t%d\t%d\t%.3f\t%.3f\t%.3f\n",
GetCurrentTime()-startTime,
currentEndpoint->rtts[0],
lastRemoteSeq,
seq,
lastRemoteAckSeq,
recvLossCount,
conctl ? conctl->GetSendLossCount() : 0,
conctl ? (int)conctl->GetInflightDataSize() : 0,
encoder ? encoder->GetBitrate() : 0,
encoder ? encoder->GetPacketLoss() : 0,
jitterBuffer ? jitterBuffer->GetLastMeasuredJitter() : 0,
jitterBuffer ? jitterBuffer->GetLastMeasuredDelay()*0.06 : 0,
jitterBuffer ? jitterBuffer->GetAverageDelay()*0.06 : 0);
}
#if defined(__APPLE__) && defined(TGVOIP_USE_AUDIO_SESSION)
if(needNotifyAcquiredAudioSession){
needNotifyAcquiredAudioSession=false;
audio::AudioUnitIO::AudioSessionAcquired();
}
#endif
}
LOGI("=== tick thread exiting ===");
}
Endpoint& VoIPController::GetRemoteEndpoint(){
//return useLan ? &remoteLanEp : &remotePublicEp;
return *currentEndpoint;
}
void VoIPController::SendPacket(unsigned char *data, size_t len, Endpoint* ep){
if(stopping)
return;
if(ep->type==EP_TYPE_TCP_RELAY && !useTCP)
return;
//dst.sin_addr=ep->address;
//dst.sin_port=htons(ep->port);
//dst.sin_family=AF_INET;
BufferOutputStream out(len+128);
if(ep->type==EP_TYPE_UDP_RELAY || ep->type==EP_TYPE_TCP_RELAY)
out.WriteBytes((unsigned char*)ep->peerTag, 16);
else
out.WriteBytes(callID, 16);
if(len>0){
BufferOutputStream inner(len+128);
inner.WriteInt32(len);
inner.WriteBytes(data, len);
if(inner.GetLength()%16!=0){
size_t padLen=16-inner.GetLength()%16;
unsigned char padding[16];
crypto.rand_bytes((uint8_t *) padding, padLen);
inner.WriteBytes(padding, padLen);
}
assert(inner.GetLength()%16==0);
unsigned char key[32], iv[32], msgHash[SHA1_LENGTH];
crypto.sha1((uint8_t *) inner.GetBuffer(), len+4, msgHash);
out.WriteBytes(keyFingerprint, 8);
out.WriteBytes((msgHash+(SHA1_LENGTH-16)), 16);
KDF(msgHash+(SHA1_LENGTH-16), isOutgoing ? 0 : 8, key, iv);
unsigned char aesOut[MSC_STACK_FALLBACK(inner.GetLength(), 1500)];
crypto.aes_ige_encrypt(inner.GetBuffer(), aesOut, inner.GetLength(), key, iv);
out.WriteBytes(aesOut, inner.GetLength());
}
//LOGV("Sending %d bytes to %s:%d", out.GetLength(), ep->address.ToString().c_str(), ep->port);
if(IS_MOBILE_NETWORK(networkType))
stats.bytesSentMobile+=(uint64_t)out.GetLength();
else
stats.bytesSentWifi+=(uint64_t)out.GetLength();
NetworkPacket pkt;
pkt.address=(NetworkAddress*)&ep->address;
pkt.port=ep->port;
pkt.length=out.GetLength();
pkt.data=out.GetBuffer();
pkt.protocol=ep->type==EP_TYPE_TCP_RELAY ? PROTO_TCP : PROTO_UDP;
//socket->Send(&pkt);
if(ep->type==EP_TYPE_TCP_RELAY){
if(ep->socket){
ep->socket->Send(&pkt);
}else{
LOGI("connecting to tcp: %s:%u", ep->address.ToString().c_str(), ep->port);
NetworkSocket* s;
if(proxyProtocol==PROXY_NONE){
s=NetworkSocket::Create(PROTO_TCP);
}else if(proxyProtocol==PROXY_SOCKS5){
NetworkSocket* rawTcp=NetworkSocket::Create(PROTO_TCP);
openingTcpSocket=rawTcp;
rawTcp->Connect(resolvedProxyAddress, proxyPort);
if(rawTcp->IsFailed()){
openingTcpSocket=NULL;
rawTcp->Close();
delete rawTcp;
LOGW("Error connecting to SOCKS5 proxy");
return;
}
NetworkSocketSOCKS5Proxy* proxy=new NetworkSocketSOCKS5Proxy(rawTcp, NULL, proxyUsername, proxyPassword);
openingTcpSocket=rawTcp;
proxy->InitConnection();
if(proxy->IsFailed()){
openingTcpSocket=NULL;
LOGW("Proxy initialization failed");
proxy->Close();
delete proxy;
return;
}
s=proxy;
}/*else if(proxyProtocol==PROXY_HTTP){
s=NetworkSocket::Create(PROTO_TCP);
}*/else{
LOGE("Unsupported proxy protocol %d", proxyProtocol);
SetState(STATE_FAILED);
return;
}
s->Connect(&ep->address, ep->port);
if(s->IsFailed()){
s->Close();
delete s;
LOGW("Error connecting to %s:%u", ep->address.ToString().c_str(), ep->port);
}else{
NetworkSocketTCPObfuscated* tcpWrapper=new NetworkSocketTCPObfuscated(s);
openingTcpSocket=tcpWrapper;
tcpWrapper->InitConnection();
openingTcpSocket=NULL;
if(tcpWrapper->IsFailed()){
tcpWrapper->Close();
delete tcpWrapper;
LOGW("Error initializing connection to %s:%u", ep->address.ToString().c_str(), ep->port);
}else{
tcpWrapper->Send(&pkt);
ep->socket=tcpWrapper;
selectCanceller->CancelSelect();
}
}
}
}else{
udpSocket->Send(&pkt);
}
}
void VoIPController::SetNetworkType(int type){
networkType=type;
UpdateDataSavingState();
UpdateAudioBitrate();
std::string itfName=udpSocket->GetLocalInterfaceInfo(NULL, NULL);
if(itfName!=activeNetItfName){
udpSocket->OnActiveInterfaceChanged();
LOGI("Active network interface changed: %s -> %s", activeNetItfName.c_str(), itfName.c_str());
bool isFirstChange=activeNetItfName.length()==0;
activeNetItfName=itfName;
if(isFirstChange)
return;
if(currentEndpoint && currentEndpoint->type!=EP_TYPE_UDP_RELAY){
if(preferredRelay->type==EP_TYPE_UDP_RELAY)
currentEndpoint=preferredRelay;
lock_mutex(endpointsMutex);
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();){
Endpoint* endpoint=*itr;
if(endpoint->type==EP_TYPE_UDP_RELAY && useTCP){
useTCP=false;
if(preferredRelay->type==EP_TYPE_TCP_RELAY){
preferredRelay=endpoint;
currentEndpoint=endpoint;
}
}else if(endpoint->type==EP_TYPE_TCP_RELAY && endpoint->socket){
endpoint->socket->Close();
}
//if(endpoint->type==EP_TYPE_UDP_P2P_INET){
endpoint->averageRTT=0;
memset(endpoint->rtts, 0, sizeof(endpoint->rtts));
//}
if(endpoint->type==EP_TYPE_UDP_P2P_LAN){
delete endpoint;
itr=endpoints.erase(itr);
}else{
++itr;
}
}
unlock_mutex(endpointsMutex);
}
udpConnectivityState=UDP_UNKNOWN;
udpPingCount=0;
lastUdpPingTime=0;
if(proxyProtocol==PROXY_SOCKS5)
InitUDPProxy();
if(allowP2p && currentEndpoint){
SendPublicEndpointsRequest();
}
BufferOutputStream s(4);
s.WriteInt32(dataSavingMode ? INIT_FLAG_DATA_SAVING_ENABLED : 0);
SendPacketReliably(PKT_NETWORK_CHANGED, s.GetBuffer(), s.GetLength(), 1, 20);
selectCanceller->CancelSelect();
}
LOGI("set network type: %d, active interface %s", type, activeNetItfName.c_str());
/*if(type==NET_TYPE_GPRS || type==NET_TYPE_EDGE)
audioPacketGrouping=2;
else
audioPacketGrouping=1;*/
}
double VoIPController::GetAverageRTT(){
if(lastSentSeq>=lastRemoteAckSeq){
uint32_t diff=lastSentSeq-lastRemoteAckSeq;
//LOGV("rtt diff=%u", diff);
if(diff<32){
int i;
double res=0;
int count=0;
for(i=diff;i<32;i++){
if(remoteAcks[i-diff]>0){
res+=(remoteAcks[i-diff]-sentPacketTimes[i]);
count++;
}
}
if(count>0)
res/=count;
return res;
}
}
return 999;
}
#if defined(__APPLE__)
static void initMachTimestart() {
mach_timebase_info_data_t tb = { 0, 0 };
mach_timebase_info(&tb);
VoIPController::machTimebase = tb.numer;
VoIPController::machTimebase /= tb.denom;
VoIPController::machTimestart = mach_absolute_time();
}
#endif
double VoIPController::GetCurrentTime(){
#if defined(__linux__)
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
return ts.tv_sec+(double)ts.tv_nsec/1000000000.0;
#elif defined(__APPLE__)
static pthread_once_t token = PTHREAD_ONCE_INIT;
pthread_once(&token, &initMachTimestart);
return (mach_absolute_time() - machTimestart) * machTimebase / 1000000000.0f;
#elif defined(_WIN32)
if(!didInitWin32TimeScale){
LARGE_INTEGER scale;
QueryPerformanceFrequency(&scale);
win32TimeScale=scale.QuadPart;
didInitWin32TimeScale=true;
}
LARGE_INTEGER t;
QueryPerformanceCounter(&t);
return (double)t.QuadPart/(double)win32TimeScale;
#endif
}
void VoIPController::SetStateCallback(void (* f)(VoIPController*, int)){
stateCallback=f;
if(stateCallback){
stateCallback(this, state);
}
}
void VoIPController::SetState(int state){
this->state=state;
LOGV("Call state changed to %d", state);
stateChangeTime=GetCurrentTime();
if(stateCallback){
stateCallback(this, state);
}
}
void VoIPController::SetMicMute(bool mute){
micMuted=mute;
if(audioInput){
if(mute)
audioInput->Stop();
else
audioInput->Start();
if(!audioInput->IsInitialized()){
lastError=TGVOIP_ERROR_AUDIO_IO;
SetState(STATE_FAILED);
return;
}
}
if(echoCanceller)
echoCanceller->Enable(!mute);
int i;
for(i=0;i<outgoingStreams.size();i++){
if(outgoingStreams[i]->type==STREAM_TYPE_AUDIO){
unsigned char buf[2];
buf[0]=outgoingStreams[i]->id;
buf[1]=(char) (mute ? 0 : 1);
SendPacketReliably(PKT_STREAM_STATE, buf, 2, .5f, 20);
outgoingStreams[i]->enabled=!mute;
}
}
}
void VoIPController::UpdateAudioOutputState(){
bool areAnyAudioStreamsEnabled=false;
int i;
for(i=0;i<incomingStreams.size();i++){
if(incomingStreams[i]->type==STREAM_TYPE_AUDIO && incomingStreams[i]->enabled)
areAnyAudioStreamsEnabled=true;
}
if(jitterBuffer){
jitterBuffer->Reset();
}
if(decoder){
decoder->ResetQueue();
}
if(audioOutput){
if(audioOutput->IsPlaying()!=areAnyAudioStreamsEnabled){
if(areAnyAudioStreamsEnabled)
audioOutput->Start();
else
audioOutput->Stop();
}
}
}
void VoIPController::KDF(unsigned char* msgKey, size_t x, unsigned char* aesKey, unsigned char* aesIv){
uint8_t sA[SHA1_LENGTH], sB[SHA1_LENGTH], sC[SHA1_LENGTH], sD[SHA1_LENGTH];
BufferOutputStream buf(128);
buf.WriteBytes(msgKey, 16);
buf.WriteBytes(encryptionKey+x, 32);
crypto.sha1(buf.GetBuffer(), buf.GetLength(), sA);
buf.Reset();
buf.WriteBytes(encryptionKey+32+x, 16);
buf.WriteBytes(msgKey, 16);
buf.WriteBytes(encryptionKey+48+x, 16);
crypto.sha1(buf.GetBuffer(), buf.GetLength(), sB);
buf.Reset();
buf.WriteBytes(encryptionKey+64+x, 32);
buf.WriteBytes(msgKey, 16);
crypto.sha1(buf.GetBuffer(), buf.GetLength(), sC);
buf.Reset();
buf.WriteBytes(msgKey, 16);
buf.WriteBytes(encryptionKey+96+x, 32);
crypto.sha1(buf.GetBuffer(), buf.GetLength(), sD);
buf.Reset();
buf.WriteBytes(sA, 8);
buf.WriteBytes(sB+8, 12);
buf.WriteBytes(sC+4, 12);
assert(buf.GetLength()==32);
memcpy(aesKey, buf.GetBuffer(), 32);
buf.Reset();
buf.WriteBytes(sA+8, 12);
buf.WriteBytes(sB, 8);
buf.WriteBytes(sC+16, 4);
buf.WriteBytes(sD, 8);
assert(buf.GetLength()==32);
memcpy(aesIv, buf.GetBuffer(), 32);
}
void VoIPController::GetDebugString(char *buffer, size_t len){
char endpointsBuf[10240];
memset(endpointsBuf, 0, 10240);
int i;
for(std::vector<Endpoint*>::iterator itrtr=endpoints.begin();itrtr!=endpoints.end();++itrtr){
const char* type;
Endpoint* endpoint=*itrtr;
switch(endpoint->type){
case EP_TYPE_UDP_P2P_INET:
type="UDP_P2P_INET";
break;
case EP_TYPE_UDP_P2P_LAN:
type="UDP_P2P_LAN";
break;
case EP_TYPE_UDP_RELAY:
type="UDP_RELAY";
break;
case EP_TYPE_TCP_RELAY:
type="TCP_RELAY";
break;
default:
type="UNKNOWN";
break;
}
if(strlen(endpointsBuf)>10240-1024)
break;
sprintf(endpointsBuf+strlen(endpointsBuf), "%s:%u %dms [%s%s]\n", endpoint->address.ToString().c_str(), endpoint->port, (int)(endpoint->averageRTT*1000), type, currentEndpoint==endpoint ? ", IN_USE" : "");
}
double avgLate[3];
if(jitterBuffer)
jitterBuffer->GetAverageLateCount(avgLate);
else
memset(avgLate, 0, 3*sizeof(double));
snprintf(buffer, len,
"Remote endpoints: \n%s"
"Jitter buffer: %d/%.2f | %.1f, %.1f, %.1f\n"
"RTT avg/min: %d/%d\n"
"Congestion window: %d/%d bytes\n"
"Key fingerprint: %02hhX%02hhX%02hhX%02hhX%02hhX%02hhX%02hhX%02hhX\n"
"Last sent/ack'd seq: %u/%u\n"
"Last recvd seq: %u\n"
"Send/recv losses: %u/%u (%d%%)\n"
"Audio bitrate: %d kbit\n"
// "Packet grouping: %d\n"
"Frame size out/in: %d/%d\n"
"Bytes sent/recvd: %llu/%llu",
endpointsBuf,
jitterBuffer ? jitterBuffer->GetMinPacketCount() : 0, jitterBuffer ? jitterBuffer->GetAverageDelay() : 0, avgLate[0], avgLate[1], avgLate[2],
// (int)(GetAverageRTT()*1000), 0,
(int)(conctl->GetAverageRTT()*1000), (int)(conctl->GetMinimumRTT()*1000),
int(conctl->GetInflightDataSize()), int(conctl->GetCongestionWindow()),
keyFingerprint[0],keyFingerprint[1],keyFingerprint[2],keyFingerprint[3],keyFingerprint[4],keyFingerprint[5],keyFingerprint[6],keyFingerprint[7],
lastSentSeq, lastRemoteAckSeq, lastRemoteSeq,
conctl->GetSendLossCount(), recvLossCount, encoder ? encoder->GetPacketLoss() : 0,
encoder ? (encoder->GetBitrate()/1000) : 0,
// audioPacketGrouping,
outgoingStreams[0]->frameDuration, incomingStreams.size()>0 ? incomingStreams[0]->frameDuration : 0,
(long long unsigned int)(stats.bytesSentMobile+stats.bytesSentWifi),
(long long unsigned int)(stats.bytesRecvdMobile+stats.bytesRecvdWifi));
}
void VoIPController::SendPublicEndpointsRequest(){
LOGI("Sending public endpoints request");
if(preferredRelay){
SendPublicEndpointsRequest(*preferredRelay);
}
if(peerPreferredRelay && peerPreferredRelay!=preferredRelay){
SendPublicEndpointsRequest(*peerPreferredRelay);
}
}
void VoIPController::SendPublicEndpointsRequest(Endpoint& relay){
if(!useUDP)
return;
LOGD("Sending public endpoints request to %s:%d", relay.address.ToString().c_str(), relay.port);
publicEndpointsReqTime=GetCurrentTime();
waitingForRelayPeerInfo=true;
unsigned char buf[32];
memcpy(buf, relay.peerTag, 16);
memset(buf+16, 0xFF, 16);
NetworkPacket pkt;
pkt.data=buf;
pkt.length=32;
pkt.address=(NetworkAddress*)&relay.address;
pkt.port=relay.port;
pkt.protocol=PROTO_UDP;
udpSocket->Send(&pkt);
}
Endpoint* VoIPController::GetEndpointByType(int type){
if(type==EP_TYPE_UDP_RELAY && preferredRelay)
return preferredRelay;
for(std::vector<Endpoint*>::iterator itrtr=endpoints.begin();itrtr!=endpoints.end();++itrtr){
if((*itrtr)->type==type)
return *itrtr;
}
return NULL;
}
float VoIPController::GetOutputLevel(){
if(!audioOutput || !audioOutStarted){
return 0.0;
}
return audioOutput->GetLevel();
}
void VoIPController::SendPacketReliably(unsigned char type, unsigned char *data, size_t len, double retryInterval, double timeout){
LOGD("Send reliably, type=%u, len=%u, retry=%.3f, timeout=%.3f", type, unsigned(len), retryInterval, timeout);
voip_queued_packet_t* pkt=(voip_queued_packet_t *) malloc(sizeof(voip_queued_packet_t));
memset(pkt, 0, sizeof(voip_queued_packet_t));
pkt->type=type;
if(data){
pkt->data=(unsigned char *) malloc(len);
memcpy(pkt->data, data, len);
pkt->length=len;
}
pkt->retryInterval=retryInterval;
pkt->timeout=timeout;
pkt->firstSentTime=0;
pkt->lastSentTime=0;
lock_mutex(queuedPacketsMutex);
queuedPackets.push_back(pkt);
unlock_mutex(queuedPacketsMutex);
}
void VoIPController::SetConfig(voip_config_t *cfg){
memcpy(&config, cfg, sizeof(voip_config_t));
if(tgvoipLogFile){
fclose(tgvoipLogFile);
}
if(strlen(cfg->logFilePath)){
tgvoipLogFile=fopen(cfg->logFilePath, "a");
tgvoip_log_file_write_header();
}
if(statsDump)
fclose(statsDump);
if(strlen(cfg->statsDumpFilePath)){
statsDump=fopen(cfg->statsDumpFilePath, "w");
if(statsDump)
fprintf(statsDump, "Time\tRTT\tLRSeq\tLSSeq\tLASeq\tLostR\tLostS\tCWnd\tBitrate\tLoss%%\tJitter\tJDelay\tAJDelay\n");
else
LOGW("Failed to open stats dump file %s for writing", cfg->statsDumpFilePath);
}
UpdateDataSavingState();
UpdateAudioBitrate();
}
void VoIPController::UpdateDataSavingState(){
if(config.data_saving==DATA_SAVING_ALWAYS){
dataSavingMode=true;
}else if(config.data_saving==DATA_SAVING_MOBILE){
dataSavingMode=networkType==NET_TYPE_GPRS || networkType==NET_TYPE_EDGE ||
networkType==NET_TYPE_3G || networkType==NET_TYPE_HSPA || networkType==NET_TYPE_LTE || networkType==NET_TYPE_OTHER_MOBILE;
}else{
dataSavingMode=false;
}
LOGI("update data saving mode, config %d, enabled %d, reqd by peer %d", config.data_saving, dataSavingMode, dataSavingRequestedByPeer);
}
void VoIPController::DebugCtl(int request, int param){
if(request==1){ // set bitrate
maxBitrate=param;
if(encoder){
encoder->SetBitrate(maxBitrate);
}
}else if(request==2){ // set packet loss
if(encoder){
encoder->SetPacketLoss(param);
}
}else if(request==3){ // force enable/disable p2p
allowP2p=param==1;
if(!allowP2p && currentEndpoint && currentEndpoint->type!=EP_TYPE_UDP_RELAY){
currentEndpoint=preferredRelay;
}else if(allowP2p){
SendPublicEndpointsRequest();
}
BufferOutputStream s(4);
s.WriteInt32(dataSavingMode ? INIT_FLAG_DATA_SAVING_ENABLED : 0);
SendPacketReliably(PKT_NETWORK_CHANGED, s.GetBuffer(), s.GetLength(), 1, 20);
}else if(request==4){
if(echoCanceller)
echoCanceller->Enable(param==1);
}
}
const char* VoIPController::GetVersion(){
return LIBTGVOIP_VERSION;
}
int64_t VoIPController::GetPreferredRelayID(){
if(preferredRelay)
return preferredRelay->id;
return 0;
}
int VoIPController::GetLastError(){
return lastError;
}
void VoIPController::GetStats(voip_stats_t *stats){
memcpy(stats, &this->stats, sizeof(voip_stats_t));
}
#ifdef TGVOIP_USE_AUDIO_SESSION
void VoIPController::SetAcquireAudioSession(void (^completion)(void (^)())) {
this->acquireAudioSession = [completion copy];
}
void VoIPController::ReleaseAudioSession(void (^completion)()) {
completion();
}
#endif
void VoIPController::LogDebugInfo(){
std::string json="{\"endpoints\":[";
for(std::vector<Endpoint*>::iterator itr=endpoints.begin();itr!=endpoints.end();++itr){
Endpoint* e=*itr;
char buffer[1024];
const char* typeStr="unknown";
switch(e->type){
case EP_TYPE_UDP_RELAY:
typeStr="udp_relay";
break;
case EP_TYPE_UDP_P2P_INET:
typeStr="udp_p2p_inet";
break;
case EP_TYPE_UDP_P2P_LAN:
typeStr="udp_p2p_lan";
break;
case EP_TYPE_TCP_RELAY:
typeStr="tcp_relay";
break;
}
snprintf(buffer, 1024, "{\"address\":\"%s\",\"port\":%u,\"type\":\"%s\",\"rtt\":%u%s%s}", e->address.ToString().c_str(), e->port, typeStr, (unsigned int)round(e->averageRTT*1000), currentEndpoint==&*e ? ",\"in_use\":true" : "", preferredRelay==&*e ? ",\"preferred\":true" : "");
json+=buffer;
if(itr!=endpoints.end()-1)
json+=",";
}
json+="],";
char buffer[1024];
const char* netTypeStr;
switch(networkType){
case NET_TYPE_WIFI:
netTypeStr="wifi";
break;
case NET_TYPE_GPRS:
netTypeStr="gprs";
break;
case NET_TYPE_EDGE:
netTypeStr="edge";
break;
case NET_TYPE_3G:
netTypeStr="3g";
break;
case NET_TYPE_HSPA:
netTypeStr="hspa";
break;
case NET_TYPE_LTE:
netTypeStr="lte";
break;
case NET_TYPE_ETHERNET:
netTypeStr="ethernet";
break;
case NET_TYPE_OTHER_HIGH_SPEED:
netTypeStr="other_high_speed";
break;
case NET_TYPE_OTHER_LOW_SPEED:
netTypeStr="other_low_speed";
break;
case NET_TYPE_DIALUP:
netTypeStr="dialup";
break;
case NET_TYPE_OTHER_MOBILE:
netTypeStr="other_mobile";
break;
default:
netTypeStr="unknown";
break;
}
snprintf(buffer, 1024, "\"time\":%u,\"network_type\":\"%s\"}", (unsigned int)time(NULL), netTypeStr);
json+=buffer;
debugLogs.push_back(json);
}
std::string VoIPController::GetDebugLog(){
std::string log="{\"events\":[";
for(std::vector<std::string>::iterator itr=debugLogs.begin();itr!=debugLogs.end();++itr){
log+=(*itr);
if((itr+1)!=debugLogs.end())
log+=",";
}
log+="],\"libtgvoip_version\":\"" LIBTGVOIP_VERSION "\"}";
return log;
}
void VoIPController::GetDebugLog(char *buffer){
strcpy(buffer, GetDebugLog().c_str());
}
size_t VoIPController::GetDebugLogLength(){
size_t len=128;
for(std::vector<std::string>::iterator itr=debugLogs.begin();itr!=debugLogs.end();++itr){
len+=(*itr).length()+1;
}
return len;
}
std::vector<AudioInputDevice> VoIPController::EnumerateAudioInputs(){
vector<AudioInputDevice> devs;
audio::AudioInput::EnumerateDevices(devs);
return devs;
}
std::vector<AudioOutputDevice> VoIPController::EnumerateAudioOutputs(){
vector<AudioOutputDevice> devs;
audio::AudioOutput::EnumerateDevices(devs);
return devs;
}
void VoIPController::SetCurrentAudioInput(std::string id){
currentAudioInput=id;
if(audioInput)
audioInput->SetCurrentDevice(id);
}
void VoIPController::SetCurrentAudioOutput(std::string id){
currentAudioOutput=id;
if(audioOutput)
audioOutput->SetCurrentDevice(id);
}
std::string VoIPController::GetCurrentAudioInputID(){
return currentAudioInput;
}
std::string VoIPController::GetCurrentAudioOutputID(){
return currentAudioOutput;
}
void VoIPController::SetProxy(int protocol, std::string address, uint16_t port, std::string username, std::string password){
proxyProtocol=protocol;
proxyAddress=address;
proxyPort=port;
proxyUsername=username;
proxyPassword=password;
}
void VoIPController::SendUdpPing(Endpoint *endpoint){
if(endpoint->type!=EP_TYPE_UDP_RELAY)
return;
LOGV("Sending UDP ping to %s:%d", endpoint->address.ToString().c_str(), endpoint->port);
BufferOutputStream p(1024);
p.WriteBytes(endpoint->peerTag, 16);
p.WriteInt32(-1);
p.WriteInt32(-1);
p.WriteInt32(-1);
p.WriteInt32(-2);
p.WriteInt64(12345);
NetworkPacket pkt;
pkt.address=&endpoint->address;
pkt.port=endpoint->port;
pkt.protocol=PROTO_UDP;
pkt.data=p.GetBuffer();
pkt.length=p.GetLength();
udpSocket->Send(&pkt);
}
Endpoint::Endpoint(int64_t id, uint16_t port, IPv4Address& _address, IPv6Address& _v6address, char type, unsigned char peerTag[16]) : address(_address), v6address(_v6address){
this->id=id;
this->port=port;
this->type=type;
memcpy(this->peerTag, peerTag, 16);
LOGV("new endpoint %lld: %s:%u", (long long int)id, address.ToString().c_str(), port);
lastPingSeq=0;
lastPingTime=0;
averageRTT=0;
memset(rtts, 0, sizeof(rtts));
socket=NULL;
}
Endpoint::Endpoint() : address(0), v6address("::0") {
lastPingSeq=0;
lastPingTime=0;
averageRTT=0;
memset(rtts, 0, sizeof(rtts));
socket=NULL;
}
#if defined(__APPLE__) && TARGET_OS_IPHONE
void VoIPController::SetRemoteEndpoints(voip_legacy_endpoint_t* buffer, size_t count, bool allowP2P){
std::vector<Endpoint> endpoints;
for(size_t i=0;i<count;i++){
voip_legacy_endpoint_t e=buffer[i];
IPv4Address v4addr=IPv4Address(std::string(e.address));
IPv6Address v6addr=IPv6Address(std::string(e.address6));
endpoints.push_back(Endpoint(e.id, e.port, v4addr, v6addr, EP_TYPE_UDP_RELAY, e.peerTag));
}
this->SetRemoteEndpoints(endpoints, allowP2P);
}
#endif
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