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d073b80063
NekoX/TMessagesProj/jni/tgnet/ConnectionSocket.cpp
DrKLO d073b80063 Update to 4.9.0
2018-07-30 09:07:02 +07:00

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/*
* 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 <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/socket.h>
#include <memory.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "ByteStream.h"
#include "ConnectionSocket.h"
#include "FileLog.h"
#include "Defines.h"
#include "ConnectionsManager.h"
#include "EventObject.h"
#include "Timer.h"
#include "NativeByteBuffer.h"
#include "BuffersStorage.h"
#ifndef EPOLLRDHUP
#define EPOLLRDHUP 0x2000
#endif
ConnectionSocket::ConnectionSocket(int32_t instance) {
instanceNum = instance;
outgoingByteStream = new ByteStream();
lastEventTime = ConnectionsManager::getInstance(instanceNum).getCurrentTimeMonotonicMillis();
eventObject = new EventObject(this, EventObjectTypeConnection);
}
ConnectionSocket::~ConnectionSocket() {
if (outgoingByteStream != nullptr) {
delete outgoingByteStream;
outgoingByteStream = nullptr;
}
if (eventObject != nullptr) {
delete eventObject;
eventObject = nullptr;
}
}
void ConnectionSocket::openConnection(std::string address, uint16_t port, bool ipv6, int32_t networkType) {
currentNetworkType = networkType;
isIpv6 = ipv6;
currentAddress = address;
currentPort = port;
int epolFd = ConnectionsManager::getInstance(instanceNum).epolFd;
ConnectionsManager::getInstance(instanceNum).attachConnection(this);
memset(&socketAddress, 0, sizeof(sockaddr_in));
memset(&socketAddress6, 0, sizeof(sockaddr_in6));
std::string *proxyAddress = &overrideProxyAddress;
std::string *proxySecret = &overrideProxySecret;
uint16_t proxyPort = overrideProxyPort;
if (proxyAddress->empty()) {
proxyAddress = &ConnectionsManager::getInstance(instanceNum).proxyAddress;
proxyPort = ConnectionsManager::getInstance(instanceNum).proxyPort;
proxySecret = &ConnectionsManager::getInstance(instanceNum).proxySecret;
}
if (proxyAddress != nullptr && !proxyAddress->empty()) {
if ((socketFd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
DEBUG_E("connection(%p) can't create proxy socket", this);
closeSocket(1, -1);
return;
}
if (proxySecret->empty()) {
proxyAuthState = 1;
} else {
proxyAuthState = 0;
}
socketAddress.sin_family = AF_INET;
socketAddress.sin_port = htons(proxyPort);
bool continueCheckAddress;
if (inet_pton(AF_INET, proxyAddress->c_str(), &socketAddress.sin_addr.s_addr) != 1) {
continueCheckAddress = true;
DEBUG_D("connection(%p) not ipv4 address %s", this, proxyAddress->c_str());
} else {
ipv6 = false;
continueCheckAddress = false;
}
if (continueCheckAddress) {
if (inet_pton(AF_INET6, proxyAddress->c_str(), &socketAddress6.sin6_addr.s6_addr) != 1) {
continueCheckAddress = true;
DEBUG_D("connection(%p) not ipv6 address %s", this, proxyAddress->c_str());
} else {
ipv6 = true;
continueCheckAddress = false;
}
if (continueCheckAddress) {
std::string host = ConnectionsManager::getInstance(instanceNum).delegate->getHostByName(*proxyAddress, instanceNum);
if (host.empty() || inet_pton(AF_INET, host.c_str(), &socketAddress.sin_addr.s_addr) != 1) {
continueCheckAddress = true;
DEBUG_E("connection(%p) can't resolve host %s address via delegate", this, proxyAddress->c_str());
} else {
continueCheckAddress = false;
DEBUG_D("connection(%p) resolved host %s address %x via delegate", this, proxyAddress->c_str(), socketAddress.sin_addr.s_addr);
}
if (continueCheckAddress) {
struct hostent *he;
if ((he = gethostbyname(proxyAddress->c_str())) == nullptr) {
DEBUG_E("connection(%p) can't resolve host %s address", this, proxyAddress->c_str());
closeSocket(1, -1);
return;
}
struct in_addr **addr_list = (struct in_addr **) he->h_addr_list;
if (addr_list[0] != nullptr) {
socketAddress.sin_addr.s_addr = addr_list[0]->s_addr;
DEBUG_D("connection(%p) resolved host %s address %x", this, proxyAddress->c_str(), addr_list[0]->s_addr);
ipv6 = false;
} else {
DEBUG_E("connection(%p) can't resolve host %s address", this, proxyAddress->c_str());
closeSocket(1, -1);
return;
}
}
}
}
} else {
proxyAuthState = 0;
if ((socketFd = socket(ipv6 ? AF_INET6 : AF_INET, SOCK_STREAM, 0)) < 0) {
DEBUG_E("connection(%p) can't create socket", this);
closeSocket(1, -1);
return;
}
if (ipv6) {
socketAddress6.sin6_family = AF_INET6;
socketAddress6.sin6_port = htons(port);
if (inet_pton(AF_INET6, address.c_str(), &socketAddress6.sin6_addr.s6_addr) != 1) {
DEBUG_E("connection(%p) bad ipv6 %s", this, address.c_str());
closeSocket(1, -1);
return;
}
} else {
socketAddress.sin_family = AF_INET;
socketAddress.sin_port = htons(port);
if (inet_pton(AF_INET, address.c_str(), &socketAddress.sin_addr.s_addr) != 1) {
DEBUG_E("connection(%p) bad ipv4 %s", this, address.c_str());
closeSocket(1, -1);
return;
}
}
}
int yes = 1;
if (setsockopt(socketFd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(int))) {
DEBUG_E("connection(%p) set TCP_NODELAY failed", this);
}
if (fcntl(socketFd, F_SETFL, O_NONBLOCK) == -1) {
DEBUG_E("connection(%p) set O_NONBLOCK failed", this);
closeSocket(1, -1);
return;
}
if (connect(socketFd, (ipv6 ? (sockaddr *) &socketAddress6 : (sockaddr *) &socketAddress), (socklen_t) (ipv6 ? sizeof(sockaddr_in6) : sizeof(sockaddr_in))) == -1 && errno != EINPROGRESS) {
closeSocket(1, -1);
} else {
eventMask.events = EPOLLOUT | EPOLLIN | EPOLLRDHUP | EPOLLERR | EPOLLET;
eventMask.data.ptr = eventObject;
if (epoll_ctl(epolFd, EPOLL_CTL_ADD, socketFd, &eventMask) != 0) {
DEBUG_E("connection(%p) epoll_ctl, adding socket failed", this);
closeSocket(1, -1);
}
}
}
int32_t ConnectionSocket::checkSocketError(int32_t *error) {
if (socketFd < 0) {
return true;
}
int ret;
int code;
socklen_t len = sizeof(int);
ret = getsockopt(socketFd, SOL_SOCKET, SO_ERROR, &code, &len);
if (ret != 0 || code != 0) {
DEBUG_E("socket error 0x%x code 0x%x", ret, code);
}
*error = code;
return (ret || code) != 0;
}
void ConnectionSocket::closeSocket(int32_t reason, int32_t error) {
lastEventTime = ConnectionsManager::getInstance(instanceNum).getCurrentTimeMonotonicMillis();
ConnectionsManager::getInstance(instanceNum).detachConnection(this);
if (socketFd >= 0) {
epoll_ctl(ConnectionsManager::getInstance(instanceNum).epolFd, EPOLL_CTL_DEL, socketFd, NULL);
if (close(socketFd) != 0) {
DEBUG_E("connection(%p) unable to close socket", this);
}
socketFd = -1;
}
proxyAuthState = 0;
onConnectedSent = false;
outgoingByteStream->clean();
onDisconnected(reason, error);
}
void ConnectionSocket::onEvent(uint32_t events) {
if (events & EPOLLIN) {
int32_t error;
if (checkSocketError(&error) != 0) {
closeSocket(1, error);
return;
} else {
ssize_t readCount;
NativeByteBuffer *buffer = ConnectionsManager::getInstance(instanceNum).networkBuffer;
while (true) {
buffer->rewind();
readCount = recv(socketFd, buffer->bytes(), READ_BUFFER_SIZE, 0);
if (readCount < 0) {
closeSocket(1, -1);
DEBUG_E("connection(%p) recv failed", this);
return;
}
if (readCount > 0) {
buffer->limit((uint32_t) readCount);
lastEventTime = ConnectionsManager::getInstance(instanceNum).getCurrentTimeMonotonicMillis();
if (proxyAuthState == 2) {
if (readCount == 2) {
uint8_t auth_method = buffer->bytes()[1];
if (auth_method == 0xff) {
closeSocket(1, -1);
DEBUG_E("connection(%p) unsupported proxy auth method", this);
} else if (auth_method == 0x02) {
DEBUG_D("connection(%p) proxy auth required", this);
proxyAuthState = 3;
} else if (auth_method == 0x00) {
proxyAuthState = 5;
}
adjustWriteOp();
} else {
closeSocket(1, -1);
DEBUG_E("connection(%p) invalid proxy response on state 2", this);
}
} else if (proxyAuthState == 4) {
if (readCount == 2) {
uint8_t auth_method = buffer->bytes()[1];
if (auth_method != 0x00) {
closeSocket(1, -1);
DEBUG_E("connection(%p) auth invalid", this);
} else {
proxyAuthState = 5;
}
adjustWriteOp();
} else {
closeSocket(1, -1);
DEBUG_E("connection(%p) invalid proxy response on state 4", this);
}
} else if (proxyAuthState == 6) {
if (readCount > 2) {
uint8_t status = buffer->bytes()[1];
if (status == 0x00) {
DEBUG_D("connection(%p) connected via proxy", this);
proxyAuthState = 0;
adjustWriteOp();
} else {
closeSocket(1, -1);
DEBUG_E("connection(%p) invalid proxy status on state 6, 0x%x", this, status);
}
} else {
closeSocket(1, -1);
DEBUG_E("connection(%p) invalid proxy response on state 6", this);
}
} else if (proxyAuthState == 0) {
if (ConnectionsManager::getInstance(instanceNum).delegate != nullptr) {
ConnectionsManager::getInstance(instanceNum).delegate->onBytesReceived((int32_t) readCount, currentNetworkType, instanceNum);
}
onReceivedData(buffer);
}
}
if (readCount != READ_BUFFER_SIZE) {
break;
}
}
}
}
if (events & EPOLLOUT) {
int32_t error;
if (checkSocketError(&error) != 0) {
closeSocket(1, error);
return;
} else {
if (proxyAuthState != 0) {
if (proxyAuthState == 1) {
lastEventTime = ConnectionsManager::getInstance(instanceNum).getCurrentTimeMonotonicMillis();
proxyAuthState = 2;
buffer[0] = 0x05;
buffer[1] = 0x02;
buffer[2] = 0x00;
buffer[3] = 0x02;
if (send(socketFd, buffer, 4, 0) < 0) {
DEBUG_E("connection(%p) send failed", this);
closeSocket(1, -1);
return;
}
adjustWriteOp();
} else if (proxyAuthState == 3) {
buffer[0] = 0x01;
std::string *proxyUser;
std::string *proxyPassword;
if (!overrideProxyAddress.empty()) {
proxyUser = &overrideProxyUser;
proxyPassword = &overrideProxyPassword;
} else {
proxyUser = &ConnectionsManager::getInstance(instanceNum).proxyUser;
proxyPassword = &ConnectionsManager::getInstance(instanceNum).proxyPassword;
}
uint8_t len1 = (uint8_t) proxyUser->length();
uint8_t len2 = (uint8_t) proxyPassword->length();
buffer[1] = len1;
memcpy(&buffer[2], proxyUser->c_str(), len1);
buffer[2 + len1] = len2;
memcpy(&buffer[3 + len1], proxyPassword->c_str(), len2);
proxyAuthState = 4;
if (send(socketFd, buffer, 3 + len1 + len2, 0) < 0) {
DEBUG_E("connection(%p) send failed", this);
closeSocket(1, -1);
return;
}
adjustWriteOp();
} else if (proxyAuthState == 5) {
buffer[0] = 0x05;
buffer[1] = 0x01;
buffer[2] = 0x00;
buffer[3] = (uint8_t) (isIpv6 ? 0x04 : 0x01);
uint16_t networkPort = ntohs(currentPort);
inet_pton(isIpv6 ? AF_INET6 : AF_INET, currentAddress.c_str(), &buffer[4]);
memcpy(&buffer[4 + (isIpv6 ? 16 : 4)], &networkPort, sizeof(uint16_t));
proxyAuthState = 6;
if (send(socketFd, buffer, 4 + (isIpv6 ? 16 : 4) + 2, 0) < 0) {
DEBUG_E("connection(%p) send failed", this);
closeSocket(1, -1);
return;
}
adjustWriteOp();
}
} else {
if (!onConnectedSent) {
lastEventTime = ConnectionsManager::getInstance(instanceNum).getCurrentTimeMonotonicMillis();
onConnected();
onConnectedSent = true;
}
NativeByteBuffer *buffer = ConnectionsManager::getInstance(instanceNum).networkBuffer;
buffer->clear();
outgoingByteStream->get(buffer);
buffer->flip();
uint32_t remaining = buffer->remaining();
if (remaining) {
ssize_t sentLength;
if ((sentLength = send(socketFd, buffer->bytes(), remaining, 0)) < 0) {
DEBUG_E("connection(%p) send failed", this);
closeSocket(1, -1);
return;
} else {
if (ConnectionsManager::getInstance(instanceNum).delegate != nullptr) {
ConnectionsManager::getInstance(instanceNum).delegate->onBytesSent((int32_t) sentLength, currentNetworkType, instanceNum);
}
outgoingByteStream->discard((uint32_t) sentLength);
adjustWriteOp();
}
}
}
}
}
if (events & EPOLLHUP) {
DEBUG_E("socket event has EPOLLHUP");
closeSocket(1, -1);
return;
} else if (events & EPOLLRDHUP) {
DEBUG_E("socket event has EPOLLRDHUP");
closeSocket(1, -1);
return;
}
if (events & EPOLLERR) {
DEBUG_E("connection(%p) epoll error", this);
return;
}
}
void ConnectionSocket::writeBuffer(uint8_t *data, uint32_t size) {
NativeByteBuffer *buffer = BuffersStorage::getInstance().getFreeBuffer(size);
buffer->writeBytes(data, size);
outgoingByteStream->append(buffer);
adjustWriteOp();
}
void ConnectionSocket::writeBuffer(NativeByteBuffer *buffer) {
outgoingByteStream->append(buffer);
adjustWriteOp();
}
void ConnectionSocket::adjustWriteOp() {
eventMask.events = EPOLLIN | EPOLLRDHUP | EPOLLERR | EPOLLET;
if (proxyAuthState == 0 && (outgoingByteStream->hasData() || !onConnectedSent) || proxyAuthState == 1 || proxyAuthState == 3 || proxyAuthState == 5) {
eventMask.events |= EPOLLOUT;
}
eventMask.data.ptr = eventObject;
if (epoll_ctl(ConnectionsManager::getInstance(instanceNum).epolFd, EPOLL_CTL_MOD, socketFd, &eventMask) != 0) {
DEBUG_E("connection(%p) epoll_ctl, modify socket failed", this);
closeSocket(1, -1);
}
}
void ConnectionSocket::setTimeout(time_t time) {
timeout = time;
lastEventTime = ConnectionsManager::getInstance(instanceNum).getCurrentTimeMonotonicMillis();
}
time_t ConnectionSocket::getTimeout() {
return timeout;
}
void ConnectionSocket::checkTimeout(int64_t now) {
if (timeout != 0 && (now - lastEventTime) > (int64_t) timeout * 1000) {
closeSocket(2, 0);
}
}
bool ConnectionSocket::isDisconnected() {
return socketFd < 0;
}
void ConnectionSocket::dropConnection() {
closeSocket(0, 0);
}
void ConnectionSocket::setOverrideProxy(std::string address, uint16_t port, std::string username, std::string password, std::string secret) {
overrideProxyAddress = address;
overrideProxyPort = port;
overrideProxyUser = username;
overrideProxyPassword = password;
overrideProxySecret = secret;
}
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