768 lines
31 KiB
C++
768 lines
31 KiB
C++
/*
|
|
* This is the source code of tgnet library v. 1.1
|
|
* It is licensed under GNU GPL v. 2 or later.
|
|
* You should have received a copy of the license in this archive (see LICENSE).
|
|
*
|
|
* Copyright Nikolai Kudashov, 2015-2018.
|
|
*/
|
|
|
|
#include <openssl/rand.h>
|
|
#include <stdlib.h>
|
|
#include <cstring>
|
|
#include <openssl/sha.h>
|
|
#include <algorithm>
|
|
#include "Connection.h"
|
|
#include "ConnectionsManager.h"
|
|
#include "BuffersStorage.h"
|
|
#include "FileLog.h"
|
|
#include "Timer.h"
|
|
#include "Datacenter.h"
|
|
#include "NativeByteBuffer.h"
|
|
#include "ByteArray.h"
|
|
|
|
thread_local static uint32_t lastConnectionToken = 1;
|
|
|
|
Connection::Connection(Datacenter *datacenter, ConnectionType type, int8_t num) : ConnectionSession(datacenter->instanceNum), ConnectionSocket(datacenter->instanceNum) {
|
|
currentDatacenter = datacenter;
|
|
connectionNum = num;
|
|
connectionType = type;
|
|
genereateNewSessionId();
|
|
connectionState = TcpConnectionStageIdle;
|
|
reconnectTimer = new Timer(datacenter->instanceNum, [&] {
|
|
reconnectTimer->stop();
|
|
waitForReconnectTimer = false;
|
|
connect();
|
|
});
|
|
}
|
|
|
|
Connection::~Connection() {
|
|
if (reconnectTimer != nullptr) {
|
|
reconnectTimer->stop();
|
|
delete reconnectTimer;
|
|
reconnectTimer = nullptr;
|
|
}
|
|
}
|
|
|
|
void Connection::suspendConnection() {
|
|
suspendConnection(false);
|
|
}
|
|
|
|
void Connection::suspendConnection(bool idle) {
|
|
reconnectTimer->stop();
|
|
waitForReconnectTimer = false;
|
|
if (connectionState == TcpConnectionStageIdle || connectionState == TcpConnectionStageSuspended) {
|
|
return;
|
|
}
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) suspend", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType);
|
|
connectionState = idle ? TcpConnectionStageIdle : TcpConnectionStageSuspended;
|
|
dropConnection();
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionClosed(this, 0);
|
|
firstPacketSent = false;
|
|
if (restOfTheData != nullptr) {
|
|
restOfTheData->reuse();
|
|
restOfTheData = nullptr;
|
|
}
|
|
lastPacketLength = 0;
|
|
connectionToken = 0;
|
|
wasConnected = false;
|
|
}
|
|
|
|
void Connection::onReceivedData(NativeByteBuffer *buffer) {
|
|
AES_ctr128_encrypt(buffer->bytes(), buffer->bytes(), buffer->limit(), &decryptKey, decryptIv, decryptCount, &decryptNum);
|
|
|
|
failedConnectionCount = 0;
|
|
|
|
if (connectionType == ConnectionTypeGeneric || connectionType == ConnectionTypeTemp || connectionType == ConnectionTypeGenericMedia) {
|
|
receivedDataAmount += buffer->limit();
|
|
if (receivedDataAmount >= 512 * 1024) {
|
|
if (currentTimeout > 4) {
|
|
currentTimeout -= 2;
|
|
setTimeout(currentTimeout);
|
|
}
|
|
receivedDataAmount = 0;
|
|
}
|
|
}
|
|
|
|
NativeByteBuffer *parseLaterBuffer = nullptr;
|
|
if (restOfTheData != nullptr) {
|
|
if (lastPacketLength == 0) {
|
|
if (restOfTheData->capacity() - restOfTheData->position() >= buffer->limit()) {
|
|
restOfTheData->limit(restOfTheData->position() + buffer->limit());
|
|
restOfTheData->writeBytes(buffer);
|
|
buffer = restOfTheData;
|
|
} else {
|
|
NativeByteBuffer *newBuffer = BuffersStorage::getInstance().getFreeBuffer(restOfTheData->limit() + buffer->limit());
|
|
restOfTheData->rewind();
|
|
newBuffer->writeBytes(restOfTheData);
|
|
newBuffer->writeBytes(buffer);
|
|
buffer = newBuffer;
|
|
restOfTheData->reuse();
|
|
restOfTheData = newBuffer;
|
|
}
|
|
} else {
|
|
uint32_t len;
|
|
if (lastPacketLength - restOfTheData->position() <= buffer->limit()) {
|
|
len = lastPacketLength - restOfTheData->position();
|
|
} else {
|
|
len = buffer->limit();
|
|
}
|
|
uint32_t oldLimit = buffer->limit();
|
|
buffer->limit(len);
|
|
restOfTheData->writeBytes(buffer);
|
|
buffer->limit(oldLimit);
|
|
if (restOfTheData->position() == lastPacketLength) {
|
|
parseLaterBuffer = buffer->hasRemaining() ? buffer : nullptr;
|
|
buffer = restOfTheData;
|
|
} else {
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) received packet size less(%u) then message size(%u)", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, restOfTheData->position(), lastPacketLength);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
buffer->rewind();
|
|
|
|
while (buffer->hasRemaining()) {
|
|
if (!hasSomeDataSinceLastConnect) {
|
|
currentDatacenter->storeCurrentAddressAndPortNum();
|
|
isTryingNextPort = false;
|
|
if (connectionType == ConnectionTypeProxy) {
|
|
setTimeout(25);
|
|
} else if (connectionType == ConnectionTypePush) {
|
|
setTimeout(60 * 15);
|
|
} else if (connectionType == ConnectionTypeUpload) {
|
|
if (ConnectionsManager::getInstance(currentDatacenter->instanceNum).networkSlow) {
|
|
setTimeout(40);
|
|
} else {
|
|
setTimeout(25);
|
|
}
|
|
} else if (connectionType == ConnectionTypeDownload) {
|
|
setTimeout(25);
|
|
} else {
|
|
setTimeout(currentTimeout);
|
|
}
|
|
}
|
|
hasSomeDataSinceLastConnect = true;
|
|
|
|
uint32_t currentPacketLength = 0;
|
|
uint32_t mark = buffer->position();
|
|
uint32_t len;
|
|
|
|
if (currentProtocolType == ProtocolTypeEF) {
|
|
uint8_t fByte = buffer->readByte(nullptr);
|
|
|
|
if ((fByte & (1 << 7)) != 0) {
|
|
buffer->position(mark);
|
|
if (buffer->remaining() < 4) {
|
|
NativeByteBuffer *reuseLater = restOfTheData;
|
|
restOfTheData = BuffersStorage::getInstance().getFreeBuffer(16384);
|
|
restOfTheData->writeBytes(buffer);
|
|
restOfTheData->limit(restOfTheData->position());
|
|
lastPacketLength = 0;
|
|
if (reuseLater != nullptr) {
|
|
reuseLater->reuse();
|
|
}
|
|
break;
|
|
}
|
|
int32_t ackId = buffer->readBigInt32(nullptr) & (~(1 << 31));
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionQuickAckReceived(this, ackId);
|
|
continue;
|
|
}
|
|
|
|
if (fByte != 0x7f) {
|
|
currentPacketLength = ((uint32_t) fByte) * 4;
|
|
} else {
|
|
buffer->position(mark);
|
|
if (buffer->remaining() < 4) {
|
|
if (restOfTheData == nullptr || (restOfTheData != nullptr && restOfTheData->position() != 0)) {
|
|
NativeByteBuffer *reuseLater = restOfTheData;
|
|
restOfTheData = BuffersStorage::getInstance().getFreeBuffer(16384);
|
|
restOfTheData->writeBytes(buffer);
|
|
restOfTheData->limit(restOfTheData->position());
|
|
lastPacketLength = 0;
|
|
if (reuseLater != nullptr) {
|
|
reuseLater->reuse();
|
|
}
|
|
} else {
|
|
restOfTheData->position(restOfTheData->limit());
|
|
}
|
|
break;
|
|
}
|
|
currentPacketLength = ((uint32_t) buffer->readInt32(nullptr) >> 8) * 4;
|
|
}
|
|
|
|
len = currentPacketLength + (fByte != 0x7f ? 1 : 4);
|
|
} else {
|
|
if (buffer->remaining() < 4) {
|
|
if (restOfTheData == nullptr || (restOfTheData != nullptr && restOfTheData->position() != 0)) {
|
|
NativeByteBuffer *reuseLater = restOfTheData;
|
|
restOfTheData = BuffersStorage::getInstance().getFreeBuffer(16384);
|
|
restOfTheData->writeBytes(buffer);
|
|
restOfTheData->limit(restOfTheData->position());
|
|
lastPacketLength = 0;
|
|
if (reuseLater != nullptr) {
|
|
reuseLater->reuse();
|
|
}
|
|
} else {
|
|
restOfTheData->position(restOfTheData->limit());
|
|
}
|
|
break;
|
|
}
|
|
|
|
uint32_t fInt = buffer->readUint32(nullptr);
|
|
|
|
if ((fInt & (0x80000000)) != 0) {
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionQuickAckReceived(this, fInt & (~(1 << 31)));
|
|
continue;
|
|
}
|
|
|
|
currentPacketLength = fInt;
|
|
len = currentPacketLength + 4;
|
|
}
|
|
|
|
if (currentProtocolType != ProtocolTypeDD && currentProtocolType != ProtocolTypeTLS && currentPacketLength % 4 != 0 || currentPacketLength > 2 * 1024 * 1024) {
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) received invalid packet length", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType);
|
|
reconnect();
|
|
return;
|
|
}
|
|
|
|
if (currentPacketLength < buffer->remaining()) {
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) received message len %u but packet larger %u", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, currentPacketLength, buffer->remaining());
|
|
} else if (currentPacketLength == buffer->remaining()) {
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) received message len %u equal to packet size", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, currentPacketLength);
|
|
} else {
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) received packet size less(%u) then message size(%u)", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, buffer->remaining(), currentPacketLength);
|
|
|
|
NativeByteBuffer *reuseLater = nullptr;
|
|
|
|
if (restOfTheData != nullptr && restOfTheData->capacity() < len) {
|
|
reuseLater = restOfTheData;
|
|
restOfTheData = nullptr;
|
|
}
|
|
if (restOfTheData == nullptr) {
|
|
buffer->position(mark);
|
|
restOfTheData = BuffersStorage::getInstance().getFreeBuffer(len);
|
|
restOfTheData->writeBytes(buffer);
|
|
} else {
|
|
restOfTheData->position(restOfTheData->limit());
|
|
restOfTheData->limit(len);
|
|
}
|
|
lastPacketLength = len;
|
|
if (reuseLater != nullptr) {
|
|
reuseLater->reuse();
|
|
}
|
|
return;
|
|
}
|
|
|
|
uint32_t old = buffer->limit();
|
|
buffer->limit(buffer->position() + currentPacketLength);
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionDataReceived(this, buffer, currentPacketLength);
|
|
buffer->position(buffer->limit());
|
|
buffer->limit(old);
|
|
|
|
if (restOfTheData != nullptr) {
|
|
if ((lastPacketLength != 0 && restOfTheData->position() == lastPacketLength) || (lastPacketLength == 0 && !restOfTheData->hasRemaining())) {
|
|
restOfTheData->reuse();
|
|
restOfTheData = nullptr;
|
|
} else {
|
|
restOfTheData->compact();
|
|
restOfTheData->limit(restOfTheData->position());
|
|
restOfTheData->position(0);
|
|
}
|
|
}
|
|
|
|
if (parseLaterBuffer != nullptr) {
|
|
buffer = parseLaterBuffer;
|
|
parseLaterBuffer = nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Connection::connect() {
|
|
if (waitForReconnectTimer) {
|
|
return;
|
|
}
|
|
if (!ConnectionsManager::getInstance(currentDatacenter->instanceNum).isNetworkAvailable()) {
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionClosed(this, 0);
|
|
return;
|
|
}
|
|
if (connectionState == TcpConnectionStageConnected ||
|
|
connectionState == TcpConnectionStageConnecting) {
|
|
return;
|
|
}
|
|
connectionInProcess = true;
|
|
connectionState = TcpConnectionStageConnecting;
|
|
isMediaConnection = false;
|
|
uint8_t strategy = ConnectionsManager::getInstance(
|
|
currentDatacenter->instanceNum).getIpStratagy();
|
|
uint32_t ipv6;
|
|
if (strategy == USE_IPV6_ONLY) {
|
|
ipv6 = TcpAddressFlagIpv6;
|
|
} else if (strategy == USE_IPV4_IPV6_RANDOM) {
|
|
if (ConnectionsManager::getInstance(currentDatacenter->instanceNum).lastProtocolUsefullData) {
|
|
ipv6 = ConnectionsManager::getInstance(currentDatacenter->instanceNum).lastProtocolIsIpv6 ? TcpAddressFlagIpv6 : 0;
|
|
} else {
|
|
uint8_t value;
|
|
RAND_bytes(&value, 1);
|
|
ipv6 = value % 3 == 0 ? TcpAddressFlagIpv6 : 0;
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).lastProtocolIsIpv6 = ipv6 != 0;
|
|
}
|
|
if (connectionType == ConnectionTypeGeneric) {
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).lastProtocolUsefullData = false;
|
|
}
|
|
} else {
|
|
ipv6 = 0;
|
|
}
|
|
uint32_t isStatic = connectionType == ConnectionTypeProxy || !ConnectionsManager::getInstance(
|
|
currentDatacenter->instanceNum).proxyAddress.empty() ? TcpAddressFlagStatic : 0;
|
|
TcpAddress *tcpAddress = nullptr;
|
|
if (isMediaConnectionType(connectionType)) {
|
|
currentAddressFlags = TcpAddressFlagDownload | isStatic;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags | ipv6);
|
|
if (tcpAddress == nullptr) {
|
|
currentAddressFlags = isStatic;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags | ipv6);
|
|
} else {
|
|
isMediaConnection = true;
|
|
}
|
|
if (tcpAddress == nullptr && ipv6) {
|
|
ipv6 = 0;
|
|
currentAddressFlags = TcpAddressFlagDownload | isStatic;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags);
|
|
if (tcpAddress == nullptr) {
|
|
currentAddressFlags = isStatic;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags);
|
|
} else {
|
|
isMediaConnection = true;
|
|
}
|
|
}
|
|
} else if (connectionType == ConnectionTypeTemp) {
|
|
currentAddressFlags = TcpAddressFlagTemp;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags);
|
|
ipv6 = 0;
|
|
} else {
|
|
currentAddressFlags = isStatic;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags | ipv6);
|
|
if (tcpAddress == nullptr && ipv6) {
|
|
ipv6 = 0;
|
|
tcpAddress = currentDatacenter->getCurrentAddress(currentAddressFlags);
|
|
}
|
|
}
|
|
if (tcpAddress == nullptr) {
|
|
hostAddress = "";
|
|
} else {
|
|
hostAddress = tcpAddress->address;
|
|
secret = tcpAddress->secret;
|
|
}
|
|
if (tcpAddress != nullptr && isStatic) {
|
|
hostPort = (uint16_t) tcpAddress->port;
|
|
} else {
|
|
hostPort = (uint16_t) currentDatacenter->getCurrentPort(currentAddressFlags);
|
|
}
|
|
|
|
reconnectTimer->stop();
|
|
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) connecting (%s:%hu)", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, hostAddress.c_str(), hostPort);
|
|
firstPacketSent = false;
|
|
if (restOfTheData != nullptr) {
|
|
restOfTheData->reuse();
|
|
restOfTheData = nullptr;
|
|
}
|
|
lastPacketLength = 0;
|
|
wasConnected = false;
|
|
hasSomeDataSinceLastConnect = false;
|
|
openConnection(hostAddress, hostPort, secret, ipv6 != 0, ConnectionsManager::getInstance(currentDatacenter->instanceNum).currentNetworkType);
|
|
if (connectionType == ConnectionTypeProxy) {
|
|
setTimeout(25);
|
|
} else if (connectionType == ConnectionTypePush) {
|
|
if (isTryingNextPort) {
|
|
setTimeout(20);
|
|
} else {
|
|
setTimeout(30);
|
|
}
|
|
} else if (connectionType == ConnectionTypeUpload) {
|
|
if (ConnectionsManager::getInstance(currentDatacenter->instanceNum).networkSlow) {
|
|
setTimeout(40);
|
|
} else {
|
|
setTimeout(25);
|
|
}
|
|
} else {
|
|
if (isTryingNextPort) {
|
|
setTimeout(8);
|
|
} else {
|
|
setTimeout(12);
|
|
}
|
|
}
|
|
connectionInProcess = false;
|
|
}
|
|
|
|
void Connection::reconnect() {
|
|
if (connectionType == ConnectionTypeProxy) {
|
|
suspendConnection(false);
|
|
} else {
|
|
forceNextPort = true;
|
|
suspendConnection(true);
|
|
connect();
|
|
}
|
|
}
|
|
|
|
bool Connection::hasUsefullData() {
|
|
int64_t time = ConnectionsManager::getInstance(currentDatacenter->instanceNum).getCurrentTimeMonotonicMillis();
|
|
if (usefullData && llabs(time - usefullDataReceiveTime) < 4 * 1000L) {
|
|
return false;
|
|
}
|
|
return usefullData;
|
|
}
|
|
|
|
bool Connection::isSuspended() {
|
|
return connectionState == TcpConnectionStageSuspended;
|
|
}
|
|
|
|
bool Connection::isMediaConnectionType(ConnectionType type) {
|
|
return (type & ConnectionTypeGenericMedia) != 0 || (type & ConnectionTypeDownload) != 0;
|
|
}
|
|
|
|
void Connection::setHasUsefullData() {
|
|
if (!usefullData) {
|
|
usefullDataReceiveTime = ConnectionsManager::getInstance(currentDatacenter->instanceNum).getCurrentTimeMonotonicMillis();
|
|
usefullData = true;
|
|
lastReconnectTimeout = 50;
|
|
}
|
|
}
|
|
|
|
bool Connection::allowsCustomPadding() {
|
|
return currentProtocolType == ProtocolTypeTLS || currentProtocolType == ProtocolTypeDD || currentProtocolType == ProtocolTypeEF;
|
|
}
|
|
|
|
void Connection::sendData(NativeByteBuffer *buff, bool reportAck, bool encrypted) {
|
|
if (buff == nullptr) {
|
|
return;
|
|
}
|
|
buff->rewind();
|
|
if (connectionState == TcpConnectionStageIdle || connectionState == TcpConnectionStageReconnecting || connectionState == TcpConnectionStageSuspended) {
|
|
connect();
|
|
}
|
|
|
|
if (isDisconnected()) {
|
|
buff->reuse();
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) disconnected, don't send data", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType);
|
|
return;
|
|
}
|
|
|
|
uint32_t bufferLen = 0;
|
|
uint32_t packetLength;
|
|
|
|
uint8_t useSecret = 0;
|
|
if (!firstPacketSent) {
|
|
if (!overrideProxyAddress.empty()) {
|
|
if (!overrideProxySecret.empty()) {
|
|
useSecret = 1;
|
|
} else if (!secret.empty()) {
|
|
useSecret = 2;
|
|
}
|
|
} else if (!ConnectionsManager::getInstance(currentDatacenter->instanceNum).proxyAddress.empty() && !ConnectionsManager::getInstance(currentDatacenter->instanceNum).proxySecret.empty()) {
|
|
useSecret = 1;
|
|
} else if (!secret.empty()) {
|
|
useSecret = 2;
|
|
}
|
|
if (useSecret != 0) {
|
|
std::string *currentSecret = getCurrentSecret(useSecret);
|
|
if (currentSecret->length() >= 17 && (*currentSecret)[0] == '\xdd') {
|
|
currentProtocolType = ProtocolTypeDD;
|
|
} else if (currentSecret->length() > 17 && (*currentSecret)[0] == '\xee') {
|
|
currentProtocolType = ProtocolTypeTLS;
|
|
} else {
|
|
currentProtocolType = ProtocolTypeEF;
|
|
}
|
|
} else {
|
|
currentProtocolType = ProtocolTypeEF;
|
|
}
|
|
}
|
|
|
|
uint32_t additinalPacketSize = 0;
|
|
if (currentProtocolType == ProtocolTypeEF) {
|
|
packetLength = buff->limit() / 4;
|
|
if (packetLength < 0x7f) {
|
|
bufferLen++;
|
|
} else {
|
|
bufferLen += 4;
|
|
}
|
|
} else {
|
|
packetLength = buff->limit();
|
|
if (currentProtocolType == ProtocolTypeDD || currentProtocolType == ProtocolTypeTLS) {
|
|
RAND_bytes((uint8_t *) &additinalPacketSize, 4);
|
|
if (!encrypted) {
|
|
additinalPacketSize = additinalPacketSize % 257;
|
|
} else {
|
|
additinalPacketSize = additinalPacketSize % 16;
|
|
}
|
|
packetLength += additinalPacketSize;
|
|
} else {
|
|
RAND_bytes((uint8_t *) &additinalPacketSize, 4);
|
|
if (!encrypted) {
|
|
additinalPacketSize = additinalPacketSize % 257;
|
|
uint32_t additionalSize = additinalPacketSize % 4;
|
|
if (additionalSize != 0) {
|
|
additinalPacketSize += (4 - additionalSize);
|
|
}
|
|
}
|
|
packetLength += additinalPacketSize;
|
|
}
|
|
bufferLen += 4;
|
|
}
|
|
|
|
if (!firstPacketSent) {
|
|
bufferLen += 64;
|
|
}
|
|
|
|
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(bufferLen);
|
|
NativeByteBuffer *buffer2;
|
|
if (additinalPacketSize > 0) {
|
|
buffer2 = BuffersStorage::getInstance().getFreeBuffer(additinalPacketSize);
|
|
RAND_bytes(buffer2->bytes(), additinalPacketSize);
|
|
} else {
|
|
buffer2 = nullptr;
|
|
}
|
|
uint8_t *bytes = buffer->bytes();
|
|
|
|
if (!firstPacketSent) {
|
|
buffer->position(64);
|
|
while (true) {
|
|
RAND_bytes(bytes, 64);
|
|
uint32_t val = (bytes[3] << 24) | (bytes[2] << 16) | (bytes[1] << 8) | (bytes[0]);
|
|
uint32_t val2 = (bytes[7] << 24) | (bytes[6] << 16) | (bytes[5] << 8) | (bytes[4]);
|
|
if (currentProtocolType == ProtocolTypeTLS || bytes[0] != 0xef && val != 0x44414548 && val != 0x54534f50 && val != 0x20544547 && val != 0x4954504f && val != 0xeeeeeeee && val != 0xdddddddd && val != 0x02010316 && val2 != 0x00000000) {
|
|
if (currentProtocolType == ProtocolTypeEF) {
|
|
bytes[56] = bytes[57] = bytes[58] = bytes[59] = 0xef;
|
|
} else if (currentProtocolType == ProtocolTypeDD || currentProtocolType == ProtocolTypeTLS) {
|
|
bytes[56] = bytes[57] = bytes[58] = bytes[59] = 0xdd;
|
|
} else if (currentProtocolType == ProtocolTypeEE) {
|
|
bytes[56] = bytes[57] = bytes[58] = bytes[59] = 0xee;
|
|
}
|
|
|
|
if (useSecret != 0) {
|
|
int16_t datacenterId;
|
|
if (isMediaConnection) {
|
|
if (ConnectionsManager::getInstance(currentDatacenter->instanceNum).testBackend) {
|
|
datacenterId = -(int16_t) (10000 + currentDatacenter->getDatacenterId());
|
|
} else {
|
|
datacenterId = -(int16_t) currentDatacenter->getDatacenterId();
|
|
}
|
|
} else {
|
|
if (ConnectionsManager::getInstance(currentDatacenter->instanceNum).testBackend) {
|
|
datacenterId = (int16_t) (10000 + currentDatacenter->getDatacenterId());
|
|
} else {
|
|
datacenterId = (int16_t) currentDatacenter->getDatacenterId();
|
|
}
|
|
}
|
|
bytes[60] = (uint8_t) (datacenterId & 0xff);
|
|
bytes[61] = (uint8_t) ((datacenterId >> 8) & 0xff);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
encryptNum = decryptNum = 0;
|
|
memset(encryptCount, 0, 16);
|
|
memset(decryptCount, 0, 16);
|
|
|
|
for (int32_t a = 0; a < 48; a++) {
|
|
temp[a] = bytes[a + 8];
|
|
}
|
|
encryptKeyWithSecret(temp, useSecret);
|
|
if (AES_set_encrypt_key(temp, 256, &encryptKey) < 0) {
|
|
if (LOGS_ENABLED) DEBUG_E("unable to set encryptKey");
|
|
exit(1);
|
|
}
|
|
memcpy(encryptIv, temp + 32, 16);
|
|
|
|
for (int32_t a = 0; a < 48; a++) {
|
|
temp[a] = bytes[55 - a];
|
|
}
|
|
encryptKeyWithSecret(temp, useSecret);
|
|
if (AES_set_encrypt_key(temp, 256, &decryptKey) < 0) {
|
|
if (LOGS_ENABLED) DEBUG_E("unable to set decryptKey");
|
|
exit(1);
|
|
}
|
|
memcpy(decryptIv, temp + 32, 16);
|
|
|
|
AES_ctr128_encrypt(bytes, temp, 64, &encryptKey, encryptIv, encryptCount, &encryptNum);
|
|
memcpy(bytes + 56, temp + 56, 8);
|
|
|
|
firstPacketSent = true;
|
|
}
|
|
if (currentProtocolType == ProtocolTypeEF) {
|
|
if (packetLength < 0x7f) {
|
|
if (reportAck) {
|
|
packetLength |= (1 << 7);
|
|
}
|
|
buffer->writeByte((uint8_t) packetLength);
|
|
bytes += (buffer->limit() - 1);
|
|
AES_ctr128_encrypt(bytes, bytes, 1, &encryptKey, encryptIv, encryptCount, &encryptNum);
|
|
} else {
|
|
packetLength = (packetLength << 8) + 0x7f;
|
|
if (reportAck) {
|
|
packetLength |= (1 << 7);
|
|
}
|
|
buffer->writeInt32(packetLength);
|
|
bytes += (buffer->limit() - 4);
|
|
AES_ctr128_encrypt(bytes, bytes, 4, &encryptKey, encryptIv, encryptCount, &encryptNum);
|
|
}
|
|
} else {
|
|
if (reportAck) {
|
|
packetLength |= 0x80000000;
|
|
}
|
|
buffer->writeInt32(packetLength);
|
|
bytes += (buffer->limit() - 4);
|
|
AES_ctr128_encrypt(bytes, bytes, 4, &encryptKey, encryptIv, encryptCount, &encryptNum);
|
|
}
|
|
|
|
buffer->rewind();
|
|
writeBuffer(buffer);
|
|
buff->rewind();
|
|
AES_ctr128_encrypt(buff->bytes(), buff->bytes(), buff->limit(), &encryptKey, encryptIv, encryptCount, &encryptNum);
|
|
writeBuffer(buff);
|
|
if (buffer2 != nullptr) {
|
|
AES_ctr128_encrypt(buffer2->bytes(), buffer2->bytes(), buffer2->limit(), &encryptKey, encryptIv, encryptCount, &encryptNum);
|
|
writeBuffer(buffer2);
|
|
}
|
|
}
|
|
|
|
inline std::string *Connection::getCurrentSecret(uint8_t secretType) {
|
|
if (secretType == 2) {
|
|
return &secret;
|
|
} else if (!overrideProxySecret.empty()) {
|
|
return &overrideProxySecret;
|
|
} else {
|
|
return &ConnectionsManager::getInstance(currentDatacenter->instanceNum).proxySecret;
|
|
}
|
|
}
|
|
|
|
inline void Connection::encryptKeyWithSecret(uint8_t *bytes, uint8_t secretType) {
|
|
if (secretType == 0) {
|
|
return;
|
|
}
|
|
std::string *currentSecret = getCurrentSecret(secretType);
|
|
size_t a = 0;
|
|
size_t size = std::min((size_t) 16, currentSecret->length());
|
|
if (currentSecret->length() >= 17 && ((*currentSecret)[0] == '\xdd' || (*currentSecret)[0] == '\xee')) {
|
|
a = 1;
|
|
size = 17;
|
|
}
|
|
|
|
SHA256_CTX sha256Ctx;
|
|
SHA256_Init(&sha256Ctx);
|
|
SHA256_Update(&sha256Ctx, bytes, 32);
|
|
char b[1];
|
|
for (; a < size; a++) {
|
|
b[0] = (char) (*currentSecret)[a];
|
|
SHA256_Update(&sha256Ctx, b, 1);
|
|
}
|
|
SHA256_Final(bytes, &sha256Ctx);
|
|
}
|
|
|
|
void Connection::onDisconnectedInternal(int32_t reason, int32_t error) {
|
|
reconnectTimer->stop();
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) disconnected with reason %d", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, reason);
|
|
bool switchToNextPort = reason == 2 && wasConnected && (!hasSomeDataSinceLastConnect || currentDatacenter->isCustomPort(currentAddressFlags)) || forceNextPort;
|
|
if (connectionType == ConnectionTypeGeneric || connectionType == ConnectionTypeTemp || connectionType == ConnectionTypeGenericMedia) {
|
|
if (wasConnected && reason == 2 && currentTimeout < 16) {
|
|
currentTimeout += 2;
|
|
}
|
|
}
|
|
firstPacketSent = false;
|
|
if (restOfTheData != nullptr) {
|
|
restOfTheData->reuse();
|
|
restOfTheData = nullptr;
|
|
}
|
|
lastPacketLength = 0;
|
|
receivedDataAmount = 0;
|
|
wasConnected = false;
|
|
if (connectionState != TcpConnectionStageSuspended && connectionState != TcpConnectionStageIdle) {
|
|
connectionState = TcpConnectionStageIdle;
|
|
}
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionClosed(this, reason);
|
|
connectionToken = 0;
|
|
|
|
uint32_t datacenterId = currentDatacenter->getDatacenterId();
|
|
if (connectionState == TcpConnectionStageIdle) {
|
|
connectionState = TcpConnectionStageReconnecting;
|
|
failedConnectionCount++;
|
|
if (failedConnectionCount == 1) {
|
|
if (hasUsefullData()) {
|
|
willRetryConnectCount = 3;
|
|
} else {
|
|
willRetryConnectCount = 1;
|
|
}
|
|
}
|
|
if (ConnectionsManager::getInstance(currentDatacenter->instanceNum).isNetworkAvailable() && connectionType != ConnectionTypeProxy) {
|
|
isTryingNextPort = true;
|
|
if (failedConnectionCount > willRetryConnectCount || switchToNextPort) {
|
|
currentDatacenter->nextAddressOrPort(currentAddressFlags);
|
|
if (currentDatacenter->isRepeatCheckingAddresses() && (ConnectionsManager::getInstance(currentDatacenter->instanceNum).getIpStratagy() == USE_IPV4_ONLY || ConnectionsManager::getInstance(currentDatacenter->instanceNum).getIpStratagy() == USE_IPV6_ONLY)) {
|
|
if (LOGS_ENABLED) DEBUG_D("started retrying connection, set ipv4 ipv6 random strategy");
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).setIpStrategy(USE_IPV4_IPV6_RANDOM);
|
|
}
|
|
failedConnectionCount = 0;
|
|
}
|
|
}
|
|
if (error == 0x68 || error == 0x71) {
|
|
if (connectionType != ConnectionTypeProxy) {
|
|
waitForReconnectTimer = true;
|
|
reconnectTimer->setTimeout(lastReconnectTimeout, false);
|
|
lastReconnectTimeout *= 2;
|
|
if (lastReconnectTimeout > 400) {
|
|
lastReconnectTimeout = 400;
|
|
}
|
|
reconnectTimer->start();
|
|
}
|
|
} else {
|
|
waitForReconnectTimer = false;
|
|
if (connectionType == ConnectionTypeGenericMedia && currentDatacenter->isHandshaking(true) || connectionType == ConnectionTypeGeneric && (currentDatacenter->isHandshaking(false) || datacenterId == ConnectionsManager::getInstance(currentDatacenter->instanceNum).currentDatacenterId || datacenterId == ConnectionsManager::getInstance(currentDatacenter->instanceNum).movingToDatacenterId)) {
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) reconnect %s:%hu", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, hostAddress.c_str(), hostPort);
|
|
reconnectTimer->setTimeout(1000, false);
|
|
reconnectTimer->start();
|
|
}
|
|
}
|
|
}
|
|
usefullData = false;
|
|
}
|
|
|
|
void Connection::onDisconnected(int32_t reason, int32_t error) {
|
|
if (connectionInProcess) {
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).scheduleTask([&, reason, error] {
|
|
onDisconnectedInternal(reason, error);
|
|
});
|
|
} else {
|
|
onDisconnectedInternal(reason, error);
|
|
}
|
|
}
|
|
|
|
void Connection::onConnected() {
|
|
connectionState = TcpConnectionStageConnected;
|
|
connectionToken = lastConnectionToken++;
|
|
wasConnected = true;
|
|
if (LOGS_ENABLED) DEBUG_D("connection(%p, account%u, dc%u, type %d) connected to %s:%hu", this, currentDatacenter->instanceNum, currentDatacenter->getDatacenterId(), connectionType, hostAddress.c_str(), hostPort);
|
|
ConnectionsManager::getInstance(currentDatacenter->instanceNum).onConnectionConnected(this);
|
|
}
|
|
|
|
bool Connection::hasPendingRequests() {
|
|
return ConnectionsManager::getInstance(currentDatacenter->instanceNum).hasPendingRequestsForConnection(this);
|
|
}
|
|
|
|
Datacenter *Connection::getDatacenter() {
|
|
return currentDatacenter;
|
|
}
|
|
|
|
ConnectionType Connection::getConnectionType() {
|
|
return connectionType;
|
|
}
|
|
|
|
int8_t Connection::getConnectionNum() {
|
|
return connectionNum;
|
|
}
|
|
|
|
uint32_t Connection::getConnectionToken() {
|
|
return connectionToken;
|
|
}
|