From 223ec05fb9e16d1688a1b729a75f0131a46651f7 Mon Sep 17 00:00:00 2001 From: uvos Date: Mon, 10 Jun 2024 19:50:32 +0200 Subject: [PATCH] inital commit --- CMakeLists.txt | 16 +++ Socket.cpp | 379 +++++++++++++++++++++++++++++++++++++++++++++++++ Socket.h | 328 ++++++++++++++++++++++++++++++++++++++++++ argpopt.h | 47 ++++++ main.cpp | 116 +++++++++++++++ 5 files changed, 886 insertions(+) create mode 100644 CMakeLists.txt create mode 100644 Socket.cpp create mode 100644 Socket.h create mode 100644 argpopt.h create mode 100644 main.cpp diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..c07dac7 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,16 @@ +cmake_minimum_required(VERSION 2.4) + + +project(MessageReciever) + +set(SRC_FILES main.cpp Socket.cpp ) +set(LIBS -lnotify -lgobject-2.0) + +add_executable(${PROJECT_NAME} ${SRC_FILES}) + +target_link_libraries( ${PROJECT_NAME} ${LIBS}) +target_include_directories(${PROJECT_NAME} PRIVATE "/usr/include/glib-2.0/" "/usr/lib/glib-2.0/include" "/usr/include/gdk-pixbuf-2.0") +set_target_properties( ${PROJECT_NAME} PROPERTIES COMPILE_FLAGS -m64 LINK_FLAGS -m64) +add_definitions(" -std=c++11 -Wall -O2 -flto") + +install(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION bin) diff --git a/Socket.cpp b/Socket.cpp new file mode 100644 index 0000000..3a1389f --- /dev/null +++ b/Socket.cpp @@ -0,0 +1,379 @@ + +#include "Socket.h" + + + #include // For data types + #include // For socket(), connect(), send(), and recv() + #include // For gethostbyname() + #include // For inet_addr() + #include // For close() + #include // For sockaddr_in + #include // TCP_KEEPCNT + #include + typedef void raw_type; // Type used for raw data on this platform + +#include // For errno + +using namespace std; + +// SocketException Code + +SocketException::SocketException(const string &message, bool inclSysMsg) + : userMessage(message) { + if (inclSysMsg) { + userMessage.append(": "); + userMessage.append(strerror(errno)); + } +} + +SocketException::~SocketException() noexcept (true) { +} + +const char *SocketException::what(){ + return userMessage.c_str(); +} + +// Function to fill in address structure given an address and port +static void fillAddr(const string &address, unsigned short port, + sockaddr_in &addr) { + memset(&addr, 0, sizeof(addr)); // Zero out address structure + addr.sin_family = AF_INET; // Internet address + + hostent *host; // Resolve name + if ((host = gethostbyname(address.c_str())) == NULL) { + // strerror() will not work for gethostbyname() and hstrerror() + // is supposedly obsolete + throw SocketException("Failed to resolve name (gethostbyname())"); + } + addr.sin_addr.s_addr = *((unsigned long *) host->h_addr_list[0]); + + addr.sin_port = htons(port); // Assign port in network byte order +} + +// Socket Code + +Socket::Socket(int type, int protocol) { + + // Make a new socket + if ((sockDesc = socket(PF_INET, type, protocol)) < 0) { + throw SocketException("Socket creation failed (socket())", true); + } +} + +Socket::Socket(int sockDesc) { + this->sockDesc = sockDesc; +} + +Socket::~Socket() +{ + close(sockDesc); + sockDesc = -1; +} + +string Socket::getLocalAddress() { + sockaddr_in addr; + unsigned int addr_len = sizeof(addr); + + if (getsockname(sockDesc, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) { + throw SocketException("Fetch of local address failed (getsockname())", true); + } + return inet_ntoa(addr.sin_addr); +} + +unsigned short Socket::getLocalPort() { + sockaddr_in addr; + unsigned int addr_len = sizeof(addr); + + if (getsockname(sockDesc, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) { + throw SocketException("Fetch of local port failed (getsockname())", true); + } + return ntohs(addr.sin_port); +} + +void Socket::setLocalPort(unsigned short localPort) { + // Bind the socket to its port + sockaddr_in localAddr; + memset(&localAddr, 0, sizeof(localAddr)); + localAddr.sin_family = AF_INET; + localAddr.sin_addr.s_addr = htonl(INADDR_ANY); + localAddr.sin_port = htons(localPort); + + if (bind(sockDesc, (sockaddr *) &localAddr, sizeof(sockaddr_in)) < 0) { + throw SocketException("Set of local port failed (bind())", true); + } +} + +void Socket::setLocalAddressAndPort(const string &localAddress, + unsigned short localPort) { + // Get the address of the requested host + sockaddr_in localAddr; + fillAddr(localAddress, localPort, localAddr); + + if (bind(sockDesc, (sockaddr *) &localAddr, sizeof(sockaddr_in)) < 0) { + throw SocketException("Set of local address and port failed (bind())", true); + } +} + +void Socket::setKeepalive() +{ + int optval = 1; + setsockopt(sockDesc, SOL_SOCKET, SO_KEEPALIVE,&optval, sizeof(optval)); + + optval = 2; + setsockopt(sockDesc, SOL_SOCKET, TCP_KEEPCNT, &optval, sizeof(optval)); + + optval = 10; + setsockopt(sockDesc, SOL_SOCKET, TCP_KEEPIDLE, &optval, sizeof(optval)); + + optval = 5; + setsockopt(sockDesc, SOL_SOCKET, TCP_KEEPINTVL, &optval, sizeof(optval)); +} + +void Socket::setBlocking(bool flag) +{ + int flags = fcntl(sockDesc, F_GETFL, 0); + if( !flag ) flags = flags | O_NONBLOCK; + else flags = flags & ~O_NONBLOCK; + fcntl(sockDesc, F_SETFL, flags); +} + +void Socket::cleanUp() { + +} + +int Socket::getFD() +{ + return sockDesc; +} + +unsigned short Socket::resolveService(const string &service, + const string &protocol) { + struct servent *serv; /* Structure containing service information */ + + if ((serv = getservbyname(service.c_str(), protocol.c_str())) == NULL) + return atoi(service.c_str()); /* Service is port number */ + else + return ntohs(serv->s_port); /* Found port (network byte order) by name */ +} + +// CommunicatingSocket Code + +CommunicatingSocket::CommunicatingSocket(int type, int protocol) + : Socket(type, protocol) { +} + +CommunicatingSocket::CommunicatingSocket(int newConnSD) : Socket(newConnSD) { +} + +void CommunicatingSocket::connect(const string &foreignAddress, + unsigned short foreignPort) { + // Get the address of the requested host + sockaddr_in destAddr; + fillAddr(foreignAddress, foreignPort, destAddr); + + // Try to connect to the given port + if (::connect(sockDesc, (sockaddr *) &destAddr, sizeof(destAddr)) < 0) { + throw SocketException("Connect failed (connect())", true); + } +} + +void CommunicatingSocket::send(const void *buffer, int bufferLen) + { + if (::send(sockDesc, (raw_type *) buffer, bufferLen, 0) < 0) { + throw SocketException("Send failed (send())", true); + } +} + + +int CommunicatingSocket::recv(void *buffer, int bufferLen) +{ + int rtn; + if ((rtn = ::recv(sockDesc, (raw_type *) buffer, bufferLen, 0)) < 0 ) + { + if(errno == EWOULDBLOCK || errno == EAGAIN) + { + return -1; + } + else throw SocketException("Received failed (recv())", true); + } + + return rtn; +} + +string CommunicatingSocket::getForeignAddress() + { + sockaddr_in addr; + unsigned int addr_len = sizeof(addr); + + if (getpeername(sockDesc, (sockaddr *) &addr,(socklen_t *) &addr_len) < 0) { + throw SocketException("Fetch of foreign address failed (getpeername())", true); + } + return inet_ntoa(addr.sin_addr); +} + +unsigned short CommunicatingSocket::getForeignPort() { + sockaddr_in addr; + unsigned int addr_len = sizeof(addr); + + if (getpeername(sockDesc, (sockaddr *) &addr, (socklen_t *) &addr_len) < 0) { + throw SocketException("Fetch of foreign port failed (getpeername())", true); + } + return ntohs(addr.sin_port); +} + +// TCPSocket Code + +TCPSocket::TCPSocket() + : CommunicatingSocket(SOCK_STREAM, + IPPROTO_TCP) { +} + +TCPSocket::TCPSocket(const string &foreignAddress, unsigned short foreignPort, bool keepalive) + : CommunicatingSocket(SOCK_STREAM, IPPROTO_TCP) { + connect(foreignAddress, foreignPort); + if(keepalive) setKeepalive(); +} + +TCPSocket::TCPSocket(int newConnSD) : CommunicatingSocket(newConnSD) { +} + +// TCPServerSocket Code + +TCPServerSocket::TCPServerSocket(unsigned short localPort, int queueLen, bool keepaliveIN) + : Socket(SOCK_STREAM, IPPROTO_TCP) +{ + keepalive = keepaliveIN; + setLocalPort(localPort); + setListen(queueLen); +} + +TCPServerSocket::TCPServerSocket(const string &localAddress, unsigned short localPort, int queueLen, bool keepaliveIN) + : Socket(SOCK_STREAM, IPPROTO_TCP) +{ + keepalive = keepaliveIN; + setLocalAddressAndPort(localAddress, localPort); + setListen(queueLen); +} + +TCPSocket* TCPServerSocket::accept() +{ + int newConnSD = -1; + if ((newConnSD = ::accept(sockDesc, NULL, 0)) < 0 && errno != EAGAIN && errno != EWOULDBLOCK ) + { + throw SocketException("Accept failed (accept())", true); + } + TCPSocket* newSocket = nullptr; + if(newConnSD > 0) + { + newSocket = new TCPSocket(newConnSD); + if(keepalive) newSocket->setKeepalive(); + } + return newSocket; +} + + + +void TCPServerSocket::setListen(int queueLen) { + if (listen(sockDesc, queueLen) < 0) { + throw SocketException("Set listening socket failed (listen())", true); + } +} + +// UDPSocket Code + +UDPSocket::UDPSocket() : CommunicatingSocket(SOCK_DGRAM, + IPPROTO_UDP) { + setBroadcast(); +} + +UDPSocket::UDPSocket(unsigned short localPort) : + CommunicatingSocket(SOCK_DGRAM, IPPROTO_UDP) { + setLocalPort(localPort); + setBroadcast(); +} + +UDPSocket::UDPSocket(const string &localAddress, unsigned short localPort) + : CommunicatingSocket(SOCK_DGRAM, IPPROTO_UDP) { + setLocalAddressAndPort(localAddress, localPort); + setBroadcast(); +} + +void UDPSocket::setBroadcast() { + // If this fails, we'll hear about it when we try to send. This will allow + // system that cannot broadcast to continue if they don't plan to broadcast + int broadcastPermission = 1; + setsockopt(sockDesc, SOL_SOCKET, SO_BROADCAST, + (raw_type *) &broadcastPermission, sizeof(broadcastPermission)); +} + +void UDPSocket::disconnect() { + sockaddr_in nullAddr; + memset(&nullAddr, 0, sizeof(nullAddr)); + nullAddr.sin_family = AF_UNSPEC; + + // Try to disconnect + if (::connect(sockDesc, (sockaddr *) &nullAddr, sizeof(nullAddr)) < 0) { + if (errno != EAFNOSUPPORT) { + throw SocketException("Disconnect failed (connect())", true); + } + } +} + +void UDPSocket::sendTo(const void *buffer, int bufferLen, + const string &foreignAddress, unsigned short foreignPort) + { + sockaddr_in destAddr; + fillAddr(foreignAddress, foreignPort, destAddr); + + // Write out the whole buffer as a single message. + if (sendto(sockDesc, (raw_type *) buffer, bufferLen, 0, + (sockaddr *) &destAddr, sizeof(destAddr)) != bufferLen) { + throw SocketException("Send failed (sendto())", true); + } +} + +int UDPSocket::recvFrom(void *buffer, int bufferLen, string &sourceAddress, + unsigned short &sourcePort) { + sockaddr_in clntAddr; + socklen_t addrLen = sizeof(clntAddr); + int rtn; + if ((rtn = recvfrom(sockDesc, (raw_type *) buffer, bufferLen, MSG_DONTWAIT, (sockaddr *) &clntAddr, (socklen_t *) &addrLen)) < 0) + { + throw SocketException("Receive failed (recvfrom())", true); + } + sourceAddress = inet_ntoa(clntAddr.sin_addr); + sourcePort = ntohs(clntAddr.sin_port); + + return rtn; +} + +void UDPSocket::setMulticastTTL(unsigned char multicastTTL) { + if (setsockopt(sockDesc, IPPROTO_IP, IP_MULTICAST_TTL, + (raw_type *) &multicastTTL, sizeof(multicastTTL)) < 0) { + throw SocketException("Multicast TTL set failed (setsockopt())", true); + } +} + +void UDPSocket::joinGroup(const string &multicastGroup) { + struct ip_mreq multicastRequest; + + multicastRequest.imr_multiaddr.s_addr = inet_addr(multicastGroup.c_str()); + multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY); + if (setsockopt(sockDesc, IPPROTO_IP, IP_ADD_MEMBERSHIP, + (raw_type *) &multicastRequest, + sizeof(multicastRequest)) < 0) { + throw SocketException("Multicast group join failed (setsockopt())", true); + } +} + +void UDPSocket::leaveGroup(const string &multicastGroup) { + struct ip_mreq multicastRequest; + + multicastRequest.imr_multiaddr.s_addr = inet_addr(multicastGroup.c_str()); + multicastRequest.imr_interface.s_addr = htonl(INADDR_ANY); + if (setsockopt(sockDesc, IPPROTO_IP, IP_DROP_MEMBERSHIP, + (raw_type *) &multicastRequest, + sizeof(multicastRequest)) < 0) { + throw SocketException("Multicast group leave failed (setsockopt())", true); + } +} diff --git a/Socket.h b/Socket.h new file mode 100644 index 0000000..4023a7e --- /dev/null +++ b/Socket.h @@ -0,0 +1,328 @@ +#ifndef __SOCKET_INCLUDED__ +#define __SOCKET_INCLUDED__ + +#include // For std::string +#include // For exception class +#include +#include + +/** + * Signals a problem with the execution of a socket call. + */ +class SocketException : public std::exception { +public: + /** + * Construct a SocketException with a explanatory message. + * @param message explanatory message + * @param incSysMsg true if system message (from strerror(errno)) + * should be postfixed to the user provided message + */ + SocketException(const std::string &message, bool inclSysMsg = false) ; + + /** + * Provided just to guarantee that no exceptions are thrown. + */ + ~SocketException() noexcept (true); + + /** + * Get the exception message + * @return exception message + */ + const char *what(); + +private: + std::string userMessage; // Exception message +}; + +/** + * Base class representing basic communication endpoint + */ +class Socket { +public: + /** + * Close and deallocate this socket + */ + ~Socket(); + + /** + * Get the local address + * @return local address of socket + * @exception SocketException thrown if fetch fails + */ + std::string getLocalAddress(); + + /** + * Get the local port + * @return local port of socket + * @exception SocketException thrown if fetch fails + */ + unsigned short getLocalPort() ; + + /** + * Set the local port to the specified port and the local address + * to any interface + * @param localPort local port + * @exception SocketException thrown if setting local port fails + */ + void setLocalPort(unsigned short localPort) ; + + /** + * Set the local port to the specified port and the local address + * to the specified address. If you omit the port, a random port + * will be selected. + * @param localAddress local address + * @param localPort local port + * @exception SocketException thrown if setting local port or address fails + */ + void setLocalAddressAndPort(const std::string &localAddress, + unsigned short localPort = 0) ; + + /** + * If WinSock, unload the WinSock DLLs; otherwise do nothing. We ignore + * this in our sample client code but include it in the library for + * completeness. If you are running on Windows and you are concerned + * about DLL resource consumption, call this after you are done with all + * Socket instances. If you execute this on Windows while some instance of + * Socket exists, you are toast. For portability of client code, this is + * an empty function on non-Windows platforms so you can always include it. + * @param buffer buffer to receive the data + * @param bufferLen maximum number of bytes to read into buffer + * @return number of bytes read, 0 for EOF, and -1 for error + * @exception SocketException thrown WinSock clean up fails + */ + static void cleanUp() ; + + /** + * Resolve the specified service for the specified protocol to the + * corresponding port number in host byte order + * @param service service to resolve (e.g., "http") + * @param protocol protocol of service to resolve. Default is "tcp". + */ + static unsigned short resolveService(const std::string &service, + const std::string &protocol = "tcp"); + + void setKeepalive(); + void setBlocking(bool flag); + + int getFD(); + +private: + // Prevent the user from trying to use value semantics on this object + Socket(const Socket &sock); + void operator=(const Socket &sock); + +protected: + int sockDesc; // Socket descriptor + Socket(int type, int protocol) ; + Socket(int sockDesc); +}; + +/** + * Socket which is able to connect, send, and receive + */ +class CommunicatingSocket : public Socket { +public: + /** + * Establish a socket connection with the given foreign + * address and port + * @param foreignAddress foreign address (IP address or name) + * @param foreignPort foreign port + * @exception SocketException thrown if unable to establish connection + */ + void connect(const std::string &foreignAddress, unsigned short foreignPort) + ; + + /** + * Write the given buffer to this socket. Call connect() before + * calling send() + * @param buffer buffer to be written + * @param bufferLen number of bytes from buffer to be written + * @exception SocketException thrown if unable to send data + */ + void send(const void *buffer, int bufferLen) ; + + /** + * Read into the given buffer up to bufferLen bytes data from this + * socket. Call connect() before calling recv() + * @param buffer buffer to receive the data + * @param bufferLen maximum number of bytes to read into buffer + * @return number of bytes read, 0 for EOF, and -1 for error + * @exception SocketException thrown if unable to receive data + */ + int recv(void *buffer, int bufferLen) ; + + /** + * Get the foreign address. Call connect() before calling recv() + * @return foreign address + * @exception SocketException thrown if unable to fetch foreign address + */ + std::string getForeignAddress() ; + + /** + * Get the foreign port. Call connect() before calling recv() + * @return foreign port + * @exception SocketException thrown if unable to fetch foreign port + */ + unsigned short getForeignPort() ; + +protected: + CommunicatingSocket(int type, int protocol) ; + CommunicatingSocket(int newConnSD); +}; + +/** + * TCP socket for communication with other TCP sockets + */ +class TCPSocket : public CommunicatingSocket { +public: + /** + * Construct a TCP socket with no connection + * @exception SocketException thrown if unable to create TCP socket + */ + TCPSocket() ; + + /** + * Construct a TCP socket with a connection to the given foreign address + * and port + * @param foreignAddress foreign address (IP address or name) + * @param foreignPort foreign port + * @exception SocketException thrown if unable to create TCP socket + */ + TCPSocket(const std::string &foreignAddress, unsigned short foreignPort, bool keepalive = false) + ; + + bool isOpen(); + +private: + // Access for TCPServerSocket::accept() connection creation + friend class TCPServerSocket; + TCPSocket(int newConnSD); +}; + +/** + * TCP socket class for servers + */ +class TCPServerSocket : public Socket { +public: + /** + * Construct a TCP socket for use with a server, accepting connections + * on the specified port on any interface + * @param localPort local port of server socket, a value of zero will + * give a system-assigned unused port + * @param queueLen maximum queue length for outstanding + * connection requests (default 5) + * @exception SocketException thrown if unable to create TCP server socket + */ + TCPServerSocket(unsigned short localPort, int queueLen = 5, bool keepaliveIN = false); + + /** + * Construct a TCP socket for use with a server, accepting connections + * on the specified port on the interface specified by the given address + * @param localAddress local interface (address) of server socket + * @param localPort local port of server socket + * @param queueLen maximum queue length for outstanding + * connection requests (default 5) + * @exception SocketException thrown if unable to create TCP server socket + */ + TCPServerSocket(const std::string &localAddress, unsigned short localPort, + int queueLen = 5, bool keepaliveIN = false); + + /** + * Blocks until a new connection is established on this socket or error + * @return new connection socket + * @exception SocketException thrown if attempt to accept a new connection fails + */ + TCPSocket *accept() ; + + +private: + void setListen(int queueLen) ; + bool keepalive; +}; + +/** + * UDP socket class + */ +class UDPSocket : public CommunicatingSocket { +public: + /** + * Construct a UDP socket + * @exception SocketException thrown if unable to create UDP socket + */ + UDPSocket() ; + + /** + * Construct a UDP socket with the given local port + * @param localPort local port + * @exception SocketException thrown if unable to create UDP socket + */ + UDPSocket(unsigned short localPort) ; + + /** + * Construct a UDP socket with the given local port and address + * @param localAddress local address + * @param localPort local port + * @exception SocketException thrown if unable to create UDP socket + */ + UDPSocket(const std::string &localAddress, unsigned short localPort) + ; + + /** + * Unset foreign address and port + * @return true if disassociation is successful + * @exception SocketException thrown if unable to disconnect UDP socket + */ + void disconnect() ; + + /** + * Send the given buffer as a UDP datagram to the + * specified address/port + * @param buffer buffer to be written + * @param bufferLen number of bytes to write + * @param foreignAddress address (IP address or name) to send to + * @param foreignPort port number to send to + * @return true if send is successful + * @exception SocketException thrown if unable to send datagram + */ + void sendTo(const void *buffer, int bufferLen, const std::string &foreignAddress, + unsigned short foreignPort) ; + + /** + * Read read up to bufferLen bytes data from this socket. The given buffer + * is where the data will be placed + * @param buffer buffer to receive data + * @param bufferLen maximum number of bytes to receive + * @param sourceAddress address of datagram source + * @param sourcePort port of data source + * @return number of bytes received and -1 for error + * @exception SocketException thrown if unable to receive datagram + */ + int recvFrom(void *buffer, int bufferLen, std::string &sourceAddress, + unsigned short &sourcePort) ; + + /** + * Set the multicast TTL + * @param multicastTTL multicast TTL + * @exception SocketException thrown if unable to set TTL + */ + void setMulticastTTL(unsigned char multicastTTL) ; + + /** + * Join the specified multicast group + * @param multicastGroup multicast group address to join + * @exception SocketException thrown if unable to join group + */ + void joinGroup(const std::string &multicastGroup) ; + + /** + * Leave the specified multicast group + * @param multicastGroup multicast group address to leave + * @exception SocketException thrown if unable to leave group + */ + void leaveGroup(const std::string &multicastGroup) ; + +private: + void setBroadcast(); +}; + +#endif diff --git a/argpopt.h b/argpopt.h new file mode 100644 index 0000000..bbd25e0 --- /dev/null +++ b/argpopt.h @@ -0,0 +1,47 @@ +#pragma once +#include + +struct Config +{ + bool verbose = false; + std::string hostName = "localhost"; + unsigned short port = 6856; +}; + +const char *argp_program_version = "1.0"; +const char *argp_program_bug_address = ""; +static char doc[] = "Application gets messages from SerialMultiplexer bus and displays them as a desktop notification"; +static char args_doc[] = ""; + +static struct argp_option options[] = +{ + {"verbose", 'v', 0, 0, "Produce verbose output" }, + {"host", 'H', "ADDR", 0, "Sets the host name to connect to" }, + {"port", 'p', "PORT", 0, "Sets the port to connect to" }, + { 0 } +}; + + +error_t parse_opt (int key, char *arg, struct argp_state *state) +{ + Config* config = reinterpret_cast(state->input); + switch (key) + { + case 'v': + config->verbose = true; + break; + case 'p': + config->port = atoi(arg); + break; + case 'H': + config->hostName = arg; + break; + default: + return ARGP_ERR_UNKNOWN; + } + return 0; +} + +static struct argp argp = { options, parse_opt, args_doc, doc }; + + diff --git a/main.cpp b/main.cpp new file mode 100644 index 0000000..da07051 --- /dev/null +++ b/main.cpp @@ -0,0 +1,116 @@ +#include +#include +#include +#include +#include +#include "Socket.h" +#include "argpopt.h" + +void sigHandler(int sig) +{ + exit(0); +} + +bool showMessage(const std::string& title, const std::string& body = "") +{ + NotifyNotification* message = notify_notification_new (title.c_str(), body.c_str(), nullptr); + bool ret = notify_notification_show (message, NULL); + g_object_unref(G_OBJECT(message)); + return ret; +} + +void processLineBuffer(std::string& buffer) +{ + if(buffer.find("bcst:") == 0) buffer.erase(0, 6); + if(buffer.size() > 5 && buffer.find("MESG") == 0) + { + size_t titleEnd = buffer.size(); + size_t bodyBegin = buffer.find("BODY"); + if(bodyBegin != std::string::npos && bodyBegin > 5) + { + titleEnd = bodyBegin - 1; + } + + const std::string body = (bodyBegin == std::string::npos && buffer.begin()+bodyBegin+5 < buffer.end()) ? + "" : std::string(buffer.begin()+bodyBegin+5, buffer.end()); + + const std::string title(buffer.begin()+5, buffer.begin()+titleEnd); + showMessage(title, body); + } + +} + +static TCPSocket* socket = nullptr; + +void exitHandler() +{ + notify_uninit(); + if(socket)delete socket; +} + +bool reconnect(std::string host, unsigned short port) +{ + try + { + if(socket)delete socket; + socket = new TCPSocket(host, port); + } + catch(SocketException &e) + { + std::cerr<recv(buffer, sizeof(buffer)); + if(len <= 0) + { + std::cerr<<"socket error\n"; + int i = 0; + for(; i < 30 && reconnect(config.hostName, config.port) == false; ++i) sleep(10); + if(i >= 10) + { + std::cerr<<"reconnect failed\n"; + return 1; + } + } + for(int i = 0; i