/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Author : Boris Mikhailenko * Author : Maxim Mamontov */ #include "configproto.h" #include "conn.h" #include "stg/common.h" #include "stg/logger.h" #include #include #include #include #include #include #include #include #include #include namespace { struct IsFinished : public std::unary_function { result_type operator()(const argument_type & arg) { return (arg->IsDone() && !arg->IsKeepAlive()) || !arg->IsOk(); } }; struct RemoveConn : public std::unary_function { result_type operator()(const argument_type & arg) { delete arg; } }; } CONFIGPROTO::CONFIGPROTO(PLUGIN_LOGGER & l) : m_settings(NULL), m_admins(NULL), m_tariffs(NULL), m_users(NULL), m_port(0), m_running(false), m_stopped(true), m_logger(l), m_listenSocket(-1) { std::for_each(m_conns.begin(), m_conns.end(), RemoveConn()); } int CONFIGPROTO::Prepare() { sigset_t sigmask, oldmask; sigemptyset(&sigmask); sigaddset(&sigmask, SIGINT); sigaddset(&sigmask, SIGTERM); sigaddset(&sigmask, SIGUSR1); sigaddset(&sigmask, SIGHUP); pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask); m_listenSocket = socket(PF_INET, SOCK_STREAM, 0); if (m_listenSocket < 0) { m_errorStr = std::string("Cannot create listen socket: '") + strerror(errno) + "'."; m_logger(m_errorStr); return -1; } struct sockaddr_in listenAddr; listenAddr.sin_family = PF_INET; listenAddr.sin_port = htons(m_port); listenAddr.sin_addr.s_addr = inet_addr("0.0.0.0"); // TODO: arbitrary address int dummy = 1; if (setsockopt(m_listenSocket, SOL_SOCKET, SO_REUSEADDR, &dummy, 4) != 0) { m_errorStr = std::string("Failed to set SO_REUSEADDR to the listen socket: '") + strerror(errno) + "'."; m_logger(m_errorStr); return -1; } if (bind(m_listenSocket, reinterpret_cast(&listenAddr), sizeof(listenAddr)) == -1) { m_errorStr = std::string("Cannot bind listen socket: '") + strerror(errno) + "'."; m_logger(m_errorStr); return -1; } if (listen(m_listenSocket, 64) == -1) // TODO: backlog length { m_errorStr = std::string("Failed to start listening for connections: '") + strerror(errno) + "'."; m_logger(m_errorStr); return -1; } m_running = true; m_stopped = false; return 0; } int CONFIGPROTO::Stop() { m_running = false; for (int i = 0; i < 5 && !m_stopped; ++i) { struct timespec ts = {0, 200000000}; nanosleep(&ts, NULL); } if (!m_stopped) { m_errorStr = "Cannot stop listenign thread."; m_logger(m_errorStr); return -1; } shutdown(m_listenSocket, SHUT_RDWR); close(m_listenSocket); return 0; } void CONFIGPROTO::Run() { while (m_running) { fd_set fds; BuildFDSet(fds); struct timeval tv; tv.tv_sec = 0; tv.tv_usec = 500000; int res = select(MaxFD() + 1, &fds, NULL, NULL, &tv); if (res < 0) { m_errorStr = std::string("'select' is failed: '") + strerror(errno) + "'."; m_logger(m_errorStr); break; } if (!m_running) break; if (res > 0) HandleEvents(fds); CleanupConns(); } m_stopped = true; } int CONFIGPROTO::MaxFD() const { int maxFD = m_listenSocket; for (size_t i = 0; i < m_conns.size(); ++i) if (maxFD < m_conns[i]->Sock()) maxFD = m_conns[i]->Sock(); return maxFD; } void CONFIGPROTO::BuildFDSet(fd_set & fds) const { for (size_t i = 0; i < m_conns.size(); ++i) FD_SET(m_conns[i]->Sock(), &fds); } void CONFIGPROTO::CleanupConns() { std::vector::iterator pos; pos = std::remove_if(m_conns.begin(), m_conns.end(), IsFinished()); if (pos == m_conns.end()) return; std::for_each(pos, m_conns.end(), RemoveConn()); m_conns.erase(pos, m_conns.end()); } void CONFIGPROTO::HandleEvents(const fd_set & fds) { if (FD_ISSET(m_listenSocket, &fds)) AcceptConnection(); else { for (size_t i = 0; i < m_conns.size(); ++i) if (FD_ISSET(m_conns[i]->Sock(), &fds)) m_conns[i]->Read(); } } void CONFIGPROTO::AcceptConnection() { struct sockaddr_in outerAddr; socklen_t outerAddrLen(sizeof(outerAddr)); int sock = accept(m_listenSocket, reinterpret_cast(&outerAddr), &outerAddrLen); if (sock < 0) { m_errorStr = std::string("Failed to accept connection: '") + strerror(errno) + "'."; printfd(__FILE__, "%s", m_errorStr.c_str()); m_logger(m_errorStr); return; } assert(m_settings != NULL); assert(m_admins != NULL); assert(m_users != NULL); assert(m_tariffs != NULL); m_conns.push_back(new STG::Conn(*m_settings, *m_admins, *m_users, *m_tariffs, sock, outerAddr)); printfd(__FILE__, "New connection from %s:%d\n", inet_ntostring(m_conns.back()->IP()).c_str(), m_conns.back()->Port()); } /* void CONFIGPROTO::WriteLogAccessFailed(uint32_t ip) { m_logger("Admin's connection failed. IP %s", inet_ntostring(ip).c_str()); } */