X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/6ce56fd8481f4fc5ae2cf9383e6b6ecbff42b41d..69f081e9abebde4205aad4dd2d411a299a70fab1:/projects/sgauthstress/proto.cpp?ds=sidebyside diff --git a/projects/sgauthstress/proto.cpp b/projects/sgauthstress/proto.cpp index 06a67d8f..3150002d 100644 --- a/projects/sgauthstress/proto.cpp +++ b/projects/sgauthstress/proto.cpp @@ -1,49 +1,37 @@ +#include +#include +#include #include #include +#include #include #include +#include #include +#include #include "stg/common.h" +#include "stg/ia_packets.h" +#include "stg/locker.h" #include "proto.h" -int WaitPacket(int sd, int timeout) -{ -fd_set rfds; -FD_ZERO(&rfds); -FD_SET(sd, &rfds); - -struct timeval tv; -tv.tv_sec = timeout; -tv.tv_usec = 0; - -int res = select(sd + 1, &rfds, NULL, NULL, &tv); -if (res == -1) // Error - { - if (errno != EINTR) - { - printfd(__FILE__, "Error on select: '%s'\n", strerror(errno)); - } - return -1; - } - -if (res == 0) // Timeout - { - return 0; - } - -return 1; -} +class HasIP : public std::unary_function, bool> { + public: + explicit HasIP(uint32_t i) : ip(i) {} + bool operator()(const std::pair & value) { return value.first == ip; } + private: + uint32_t ip; +}; PROTO::PROTO(const std::string & server, uint16_t port, uint16_t localPort, int to) - : running(false), - stopped(true), - timeout(to) + : timeout(to), + running(false), + stopped(true) { uint32_t ip = inet_addr(server.c_str()); if (ip == INADDR_NONE) @@ -63,8 +51,6 @@ if (ip == INADDR_NONE) } } -sock = socket(AF_INET, SOCK_DGRAM, 0); - localAddr.sin_family = AF_INET; localAddr.sin_port = htons(localPort); localAddr.sin_addr.s_addr = inet_addr("0.0.0.0"); @@ -84,24 +70,31 @@ processors["DISCONN_SYN_ACK"] = &PROTO::DISCONN_SYN_ACK_Proc; processors["FIN"] = &PROTO::FIN_Proc; processors["INFO"] = &PROTO::INFO_Proc; // ERR_Proc will be handled explicitly + +pthread_mutex_init(&mutex, NULL); } PROTO::~PROTO() { -close(sock); +pthread_mutex_destroy(&mutex); } void * PROTO::Runner(void * data) { +sigset_t signalSet; +sigfillset(&signalSet); +pthread_sigmask(SIG_BLOCK, &signalSet, NULL); + PROTO * protoPtr = static_cast(data); protoPtr->Run(); +return NULL; } bool PROTO::Start() { stopped = false; running = true; -if (pthread_create(&tid, NULL, &Runner, NULL)) +if (pthread_create(&tid, NULL, &Runner, this)) { errorStr = "Failed to create listening thread: '"; errorStr += strerror(errno); @@ -139,71 +132,443 @@ if (pthread_join(tid, NULL)) return true; } -bool PROTO::Connect(const std::string & login) +void PROTO::AddUser(const USER & user, bool connect) { -std::map::const_iterator it; -it = users.find(login); +STG_LOCKER lock(&mutex); +users.push_back(std::make_pair(user.GetIP(), user)); +users.back().second.InitNetwork(); + +struct pollfd pfd; +pfd.fd = users.back().second.GetSocket(); +pfd.events = POLLIN; +pfd.revents = 0; +pollFds.push_back(pfd); + +if (connect) + { + RealConnect(&users.back().second); + } +} + +bool PROTO::Connect(uint32_t ip) +{ +std::list >::iterator it; +STG_LOCKER lock(&mutex); +it = std::find_if(users.begin(), users.end(), HasIP(ip)); if (it == users.end()) return false; // Do something -return true; +return RealConnect(&it->second); } -bool PROTO::Disconnect(const std::string & login) +bool PROTO::Disconnect(uint32_t ip) { -std::map::const_iterator it; -it = users.find(login); +std::list >::iterator it; +STG_LOCKER lock(&mutex); +it = std::find_if(users.begin(), users.end(), HasIP(ip)); if (it == users.end()) return false; // Do something -return true; +return RealDisconnect(&it->second); } void PROTO::Run() { while (running) { - int res = WaitPacket(sock, timeout); + int res; + { + STG_LOCKER lock(&mutex); + res = poll(&pollFds.front(), pollFds.size(), timeout); + } if (res < 0) break; if (!running) break; if (res) + { + printfd(__FILE__, "PROTO::Run() - events: %d\n", res); RecvPacket(); + } + else + { + CheckTimeouts(); + } } stopped = true; } -bool PROTO::RecvPacket() +void PROTO::CheckTimeouts() { -struct sockaddr_in addr; -socklen_t fromLen = sizeof(addr); -char buffer[2048]; -int res = recvfrom(sock, buffer, sizeof(buffer), 0, (struct sockaddr*)&addr, &fromLen); +STG_LOCKER lock(&mutex); +std::list >::iterator it; +for (it = users.begin(); it != users.end(); ++it) + { + int delta = difftime(time(NULL), it->second.GetPhaseChangeTime()); + if ((it->second.GetPhase() == 3) && + (delta > it->second.GetUserTimeout())) + { + printfd(__FILE__, "PROTO::CheckTimeouts() - user alive timeout (ip: %s, login: '%s', delta: %d > %d)\n", inet_ntostring(it->second.GetIP()).c_str(), it->second.GetLogin().c_str(), delta, it->second.GetUserTimeout()); + it->second.SetPhase(1); + } + if ((it->second.GetPhase() == 2) && + (delta > it->second.GetAliveTimeout())) + { + printfd(__FILE__, "PROTO::CheckTimeouts() - user connect timeout (ip: %s, login: '%s', delta: %d > %d)\n", inet_ntostring(it->second.GetIP()).c_str(), it->second.GetLogin().c_str(), delta, it->second.GetAliveTimeout()); + it->second.SetPhase(1); + } + } +} -if (res == -1) - return res; +bool PROTO::RecvPacket() +{ +bool result = true; +std::vector::iterator it; +std::list >::iterator userIt; +STG_LOCKER lock(&mutex); +for (it = pollFds.begin(), userIt = users.begin(); it != pollFds.end() && userIt != users.end(); ++it, ++userIt) + { + if (it->revents) + { + it->revents = 0; + assert(it->fd == userIt->second.GetSocket() && "File descriptors from poll fds and users must be syncked"); + struct sockaddr_in addr; + socklen_t fromLen = sizeof(addr); + char buffer[2048]; + int res = recvfrom(userIt->second.GetSocket(), buffer, sizeof(buffer), 0, (struct sockaddr *)&addr, &fromLen); + + if (res == -1) + { + result = false; + continue; + } + + result = result && HandlePacket(buffer, res, &(userIt->second)); + } + } -return HandlePacket(buffer); +return result; } -bool PROTO::HandlePacket(char * buffer) +bool PROTO::HandlePacket(const char * buffer, size_t length, USER * user) { -if (strcmp(buffer + 4 + sizeof(HDR_8), "ERR")) +if (!strncmp(buffer + 4 + sizeof(HDR_8), "ERR", 3)) { - return ERR_Proc(buffer); + return ERR_Proc(buffer, user); } +for (size_t i = 0; i < length / 8; i++) + Blowfish_Decrypt(user->GetCtx(), + (uint32_t *)(buffer + i * 8), + (uint32_t *)(buffer + i * 8 + 4)); + std::string packetName(buffer + 12); + std::map::const_iterator it; it = processors.find(packetName); if (it != processors.end()) - return (this->*it->second)(buffer); + return (this->*it->second)(buffer, user); + +printfd(__FILE__, "PROTO::HandlePacket() - invalid packet signature: '%s'\n", packetName.c_str()); return false; } + +bool PROTO::CONN_SYN_ACK_Proc(const void * buffer, USER * user) +{ +const CONN_SYN_ACK_8 * packet = static_cast(buffer); + +uint32_t rnd = packet->rnd; +uint32_t userTimeout = packet->userTimeOut; +uint32_t aliveTimeout = packet->aliveDelay; + +#ifdef ARCH_BE +SwapBytes(rnd); +SwapBytes(userTimeout); +SwapBytes(aliveDelay); +#endif + +if (user->GetPhase() != 2) + { + errorStr = "Unexpected CONN_SYN_ACK"; + printfd(__FILE__, "PROTO::CONN_SYN_ACK_Proc() - wrong phase: %d\n", user->GetPhase()); + return false; + } + +user->SetPhase(3); +user->SetAliveTimeout(aliveTimeout); +user->SetUserTimeout(userTimeout); +user->SetRnd(rnd); + +Send_CONN_ACK(user); + +printfd(__FILE__, "PROTO::CONN_SYN_ACK_Proc() - user '%s' successfully logged in from IP %s\n", user->GetLogin().c_str(), inet_ntostring(user->GetIP()).c_str()); + +return true; +} + +bool PROTO::ALIVE_SYN_Proc(const void * buffer, USER * user) +{ +const ALIVE_SYN_8 * packet = static_cast(buffer); + +uint32_t rnd = packet->rnd; + +#ifdef ARCH_BE +SwapBytes(rnd); +#endif + +if (user->GetPhase() != 3) + { + errorStr = "Unexpected ALIVE_SYN"; + printfd(__FILE__, "PROTO::ALIVE_SYN_Proc() - wrong phase: %d\n", user->GetPhase()); + return false; + } + +user->SetPhase(3); +user->SetRnd(rnd); // Set new rnd value for ALIVE_ACK + +Send_ALIVE_ACK(user); + +return true; +} + +bool PROTO::DISCONN_SYN_ACK_Proc(const void * buffer, USER * user) +{ +const DISCONN_SYN_ACK_8 * packet = static_cast(buffer); + +uint32_t rnd = packet->rnd; + +#ifdef ARCH_BE +SwapBytes(rnd); +#endif + +if (user->GetPhase() != 4) + { + errorStr = "Unexpected DISCONN_SYN_ACK"; + printfd(__FILE__, "PROTO::DISCONN_SYN_ACK_Proc() - wrong phase: %d\n", user->GetPhase()); + return false; + } + +if (user->GetRnd() + 1 != rnd) + { + errorStr = "Wrong control value at DISCONN_SYN_ACK"; + printfd(__FILE__, "PROTO::DISCONN_SYN_ACK_Proc() - wrong control value: %d, expected: %d\n", rnd, user->GetRnd() + 1); + } + +user->SetPhase(5); +user->SetRnd(rnd); + +Send_DISCONN_ACK(user); + +return true; +} + +bool PROTO::FIN_Proc(const void * buffer, USER * user) +{ +if (user->GetPhase() != 5) + { + errorStr = "Unexpected FIN"; + printfd(__FILE__, "PROTO::FIN_Proc() - wrong phase: %d\n", user->GetPhase()); + return false; + } + +user->SetPhase(1); + +return true; +} + +bool PROTO::INFO_Proc(const void * buffer, USER * user) +{ +//const INFO_8 * packet = static_cast(buffer); + +return true; +} + +bool PROTO::ERR_Proc(const void * /*buffer*/, USER * user) +{ +//uint32_t len = packet->len; + +#ifdef ARCH_BE +//SwapBytes(len); +#endif + +user->SetPhase(1); //TODO: Check +/*KOIToWin((const char*)err.text, &messageText); +if (pErrorCb != NULL) + pErrorCb(messageText, IA_SERVER_ERROR, errorCbData); +phaseTime = GetTickCount(); +codeError = IA_SERVER_ERROR;*/ + +return true; +} + +bool PROTO::Send_CONN_SYN(USER * user) +{ +CONN_SYN_8 packet; + +packet.len = sizeof(packet); + +#ifdef ARCH_BE +SwapBytes(packet.len); +#endif + +strncpy((char *)packet.loginS, user->GetLogin().c_str(), sizeof(packet.loginS)); +strncpy((char *)packet.type, "CONN_SYN", sizeof(packet.type)); +strncpy((char *)packet.login, user->GetLogin().c_str(), sizeof(packet.login)); +packet.dirs = 0xFFffFFff; + +return SendPacket(&packet, sizeof(packet), user); +} + +bool PROTO::Send_CONN_ACK(USER * user) +{ +CONN_ACK_8 packet; + +packet.len = sizeof(packet); +packet.rnd = user->IncRnd(); + +#ifdef ARCH_BE +SwapBytes(packet.len); +SwapBytes(packet.rnd); +#endif + +strncpy((char *)packet.loginS, user->GetLogin().c_str(), sizeof(packet.loginS)); +strncpy((char *)packet.type, "CONN_ACK", sizeof(packet.type)); + +return SendPacket(&packet, sizeof(packet), user); +} + +bool PROTO::Send_ALIVE_ACK(USER * user) +{ +ALIVE_ACK_8 packet; + +packet.len = sizeof(packet); +packet.rnd = user->IncRnd(); + +#ifdef ARCH_BE +SwapBytes(packet.len); +SwapBytes(packet.rnd); +#endif + +strncpy((char *)packet.loginS, user->GetLogin().c_str(), sizeof(packet.loginS)); +strncpy((char *)packet.type, "ALIVE_ACK", sizeof(packet.type)); + +return SendPacket(&packet, sizeof(packet), user); +} + +bool PROTO::Send_DISCONN_SYN(USER * user) +{ +DISCONN_SYN_8 packet; + +packet.len = sizeof(packet); + +#ifdef ARCH_BE +SwapBytes(packet.len); +#endif + +strncpy((char *)packet.loginS, user->GetLogin().c_str(), sizeof(packet.loginS)); +strncpy((char *)packet.type, "DISCONN_SYN", sizeof(packet.type)); +strncpy((char *)packet.login, user->GetLogin().c_str(), sizeof(packet.login)); + +return SendPacket(&packet, sizeof(packet), user); +} + +bool PROTO::Send_DISCONN_ACK(USER * user) +{ +DISCONN_ACK_8 packet; + +packet.len = sizeof(packet); +packet.rnd = user->IncRnd(); + +#ifdef ARCH_BE +SwapBytes(packet.len); +SwapBytes(packet.rnd); +#endif + +strncpy((char *)packet.loginS, user->GetLogin().c_str(), sizeof(packet.loginS)); +strncpy((char *)packet.type, "DISCONN_ACK", sizeof(packet.type)); + +return SendPacket(&packet, sizeof(packet), user); +} + +bool PROTO::SendPacket(const void * packet, size_t length, USER * user) +{ +HDR_8 hdr; + +assert(length < 2048 && "Packet length must not exceed 2048 bytes"); + +strncpy((char *)hdr.magic, IA_ID, sizeof(hdr.magic)); +hdr.protoVer[0] = 0; +hdr.protoVer[1] = 8; // IA_PROTO_VER + +unsigned char buffer[2048]; +memcpy(buffer, packet, length); +memcpy(buffer, &hdr, sizeof(hdr)); + +size_t offset = sizeof(HDR_8); +for (size_t i = 0; i < IA_LOGIN_LEN / 8; i++) + { + Blowfish_Encrypt(&ctx, + (uint32_t *)(buffer + offset + i * 8), + (uint32_t *)(buffer + offset + i * 8 + 4)); + } + +offset += IA_LOGIN_LEN; +size_t encLen = (length - IA_LOGIN_LEN) / 8; +for (size_t i = 0; i < encLen; i++) + { + Blowfish_Encrypt(user->GetCtx(), + (uint32_t*)(buffer + offset + i * 8), + (uint32_t*)(buffer + offset + i * 8 + 4)); + } + +int res = sendto(user->GetSocket(), buffer, length, 0, (struct sockaddr *)&serverAddr, sizeof(serverAddr)); + +if (res < 0) + { + errorStr = "Failed to send packet: '"; + errorStr += strerror(errno); + errorStr += "'"; + printfd(__FILE__, "PROTO::SendPacket() - %s, fd: %d\n", errorStr.c_str(), user->GetSocket()); + return false; + } + +if (res < length) + { + errorStr = "Packet sent partially"; + printfd(__FILE__, "PROTO::SendPacket() - %s\n", errorStr.c_str()); + return false; + } + +return true; +} + +bool PROTO::RealConnect(USER * user) +{ +if (user->GetPhase() != 1 && + user->GetPhase() != 5) + { + errorStr = "Unexpected connect"; + printfd(__FILE__, "PROTO::RealConnect() - wrong phase: %d\n", user->GetPhase()); + } +user->SetPhase(2); + +return Send_CONN_SYN(user); +} + +bool PROTO::RealDisconnect(USER * user) +{ +if (user->GetPhase() != 3) + { + errorStr = "Unexpected disconnect"; + printfd(__FILE__, "PROTO::RealDisconnect() - wrong phase: %d\n", user->GetPhase()); + } +user->SetPhase(4); + +return Send_DISCONN_SYN(user); +}