/* ------------------------------------------------------------------------- * Project: GSocket (Generic Socket) * Name: src/msw/gsocket.cpp * Copyright: (c) Guilhem Lavaux * Licence: wxWindows Licence * Author: Guillermo Rodriguez Garcia * Purpose: GSocket main MSW file * Licence: The wxWindows licence * CVSID: $Id: gsocket.cpp 52492 2008-03-14 14:17:14Z JS $ * ------------------------------------------------------------------------- */ // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #ifdef _MSC_VER /* RPCNOTIFICATION_ROUTINE in rasasync.h (included from winsock.h), * warning: conditional expression is constant. */ # pragma warning(disable:4115) /* FD_SET, * warning: named type definition in parentheses. */ # pragma warning(disable:4127) /* GAddress_UNIX_GetPath, * warning: unreferenced formal parameter. */ # pragma warning(disable:4100) #ifdef __WXWINCE__ /* windows.h results in tons of warnings at max warning level */ # ifdef _MSC_VER # pragma warning(push, 1) # endif # include # ifdef _MSC_VER # pragma warning(pop) # pragma warning(disable:4514) # endif #endif #endif /* _MSC_VER */ #if defined(__CYGWIN__) //CYGWIN gives annoying warning about runtime stuff if we don't do this # define USE_SYS_TYPES_FD_SET # include #endif #include #ifndef __GSOCKET_STANDALONE__ # include "wx/platform.h" #endif #if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) #ifndef __GSOCKET_STANDALONE__ # include "wx/msw/gsockmsw.h" # include "wx/gsocket.h" #else # include "gsockmsw.h" # include "gsocket.h" #endif /* __GSOCKET_STANDALONE__ */ #ifndef __WXWINCE__ #include #else #define assert(x) #ifndef isdigit #define isdigit(x) (x > 47 && x < 58) #endif #include "wx/msw/wince/net.h" #endif #include #include #include #include #include /* if we use configure for MSW WX_SOCKLEN_T will be already defined */ #ifndef WX_SOCKLEN_T # define WX_SOCKLEN_T int #endif /* Table of GUI-related functions. We must call them indirectly because * of wxBase and GUI separation: */ static GSocketGUIFunctionsTable *gs_gui_functions; class GSocketGUIFunctionsTableNull: public GSocketGUIFunctionsTable { public: virtual bool OnInit(); virtual void OnExit(); virtual bool CanUseEventLoop(); virtual bool Init_Socket(GSocket *socket); virtual void Destroy_Socket(GSocket *socket); virtual void Enable_Events(GSocket *socket); virtual void Disable_Events(GSocket *socket); }; bool GSocketGUIFunctionsTableNull::OnInit() { return true; } void GSocketGUIFunctionsTableNull::OnExit() {} bool GSocketGUIFunctionsTableNull::CanUseEventLoop() { return false; } bool GSocketGUIFunctionsTableNull::Init_Socket(GSocket *WXUNUSED(socket)) { return true; } void GSocketGUIFunctionsTableNull::Destroy_Socket(GSocket *WXUNUSED(socket)) {} void GSocketGUIFunctionsTableNull::Enable_Events(GSocket *WXUNUSED(socket)) {} void GSocketGUIFunctionsTableNull::Disable_Events(GSocket *WXUNUSED(socket)) {} /* Global initialisers */ void GSocket_SetGUIFunctions(GSocketGUIFunctionsTable *guifunc) { gs_gui_functions = guifunc; } int GSocket_Init(void) { WSADATA wsaData; if (!gs_gui_functions) { static GSocketGUIFunctionsTableNull table; gs_gui_functions = &table; } if ( !gs_gui_functions->OnInit() ) { return 0; } /* Initialize WinSocket */ return (WSAStartup((1 << 8) | 1, &wsaData) == 0); } void GSocket_Cleanup(void) { if (gs_gui_functions) { gs_gui_functions->OnExit(); } /* Cleanup WinSocket */ WSACleanup(); } /* Constructors / Destructors for GSocket */ GSocket::GSocket() { int i; m_fd = INVALID_SOCKET; for (i = 0; i < GSOCK_MAX_EVENT; i++) { m_cbacks[i] = NULL; } m_detected = 0; m_local = NULL; m_peer = NULL; m_error = GSOCK_NOERROR; m_server = false; m_stream = true; m_non_blocking = false; m_timeout.tv_sec = 10 * 60; /* 10 minutes */ m_timeout.tv_usec = 0; m_establishing = false; m_reusable = false; assert(gs_gui_functions); /* Per-socket GUI-specific initialization */ m_ok = gs_gui_functions->Init_Socket(this); } void GSocket::Close() { gs_gui_functions->Disable_Events(this); closesocket(m_fd); m_fd = INVALID_SOCKET; } GSocket::~GSocket() { assert(this); /* Per-socket GUI-specific cleanup */ gs_gui_functions->Destroy_Socket(this); /* Check that the socket is really shutdowned */ if (m_fd != INVALID_SOCKET) Shutdown(); /* Destroy private addresses */ if (m_local) GAddress_destroy(m_local); if (m_peer) GAddress_destroy(m_peer); } /* GSocket_Shutdown: * Disallow further read/write operations on this socket, close * the fd and disable all callbacks. */ void GSocket::Shutdown() { int evt; assert(this); /* If socket has been created, shutdown it */ if (m_fd != INVALID_SOCKET) { shutdown(m_fd, 1 /* SD_SEND */); Close(); } /* Disable GUI callbacks */ for (evt = 0; evt < GSOCK_MAX_EVENT; evt++) m_cbacks[evt] = NULL; m_detected = GSOCK_LOST_FLAG; } /* Address handling */ /* GSocket_SetLocal: * GSocket_GetLocal: * GSocket_SetPeer: * GSocket_GetPeer: * Set or get the local or peer address for this socket. The 'set' * functions return GSOCK_NOERROR on success, an error code otherwise. * The 'get' functions return a pointer to a GAddress object on success, * or NULL otherwise, in which case they set the error code of the * corresponding GSocket. * * Error codes: * GSOCK_INVSOCK - the socket is not valid. * GSOCK_INVADDR - the address is not valid. */ GSocketError GSocket::SetLocal(GAddress *address) { assert(this); /* the socket must be initialized, or it must be a server */ if (m_fd != INVALID_SOCKET && !m_server) { m_error = GSOCK_INVSOCK; return GSOCK_INVSOCK; } /* check address */ if (address == NULL || address->m_family == GSOCK_NOFAMILY) { m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } if (m_local) GAddress_destroy(m_local); m_local = GAddress_copy(address); return GSOCK_NOERROR; } GSocketError GSocket::SetPeer(GAddress *address) { assert(this); /* check address */ if (address == NULL || address->m_family == GSOCK_NOFAMILY) { m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } if (m_peer) GAddress_destroy(m_peer); m_peer = GAddress_copy(address); return GSOCK_NOERROR; } GAddress *GSocket::GetLocal() { GAddress *address; struct sockaddr addr; WX_SOCKLEN_T size = sizeof(addr); GSocketError err; assert(this); /* try to get it from the m_local var first */ if (m_local) return GAddress_copy(m_local); /* else, if the socket is initialized, try getsockname */ if (m_fd == INVALID_SOCKET) { m_error = GSOCK_INVSOCK; return NULL; } if (getsockname(m_fd, &addr, &size) == SOCKET_ERROR) { m_error = GSOCK_IOERR; return NULL; } /* got a valid address from getsockname, create a GAddress object */ if ((address = GAddress_new()) == NULL) { m_error = GSOCK_MEMERR; return NULL; } if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR) { GAddress_destroy(address); m_error = err; return NULL; } return address; } GAddress *GSocket::GetPeer() { assert(this); /* try to get it from the m_peer var */ if (m_peer) return GAddress_copy(m_peer); return NULL; } /* Server specific parts */ /* GSocket_SetServer: * Sets up this socket as a server. The local address must have been * set with GSocket_SetLocal() before GSocket_SetServer() is called. * Returns GSOCK_NOERROR on success, one of the following otherwise: * * Error codes: * GSOCK_INVSOCK - the socket is in use. * GSOCK_INVADDR - the local address has not been set. * GSOCK_IOERR - low-level error. */ GSocketError GSocket::SetServer() { u_long arg = 1; assert(this); /* must not be in use */ if (m_fd != INVALID_SOCKET) { m_error = GSOCK_INVSOCK; return GSOCK_INVSOCK; } /* the local addr must have been set */ if (!m_local) { m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } /* Initialize all fields */ m_server = true; m_stream = true; /* Create the socket */ m_fd = socket(m_local->m_realfamily, SOCK_STREAM, 0); if (m_fd == INVALID_SOCKET) { m_error = GSOCK_IOERR; return GSOCK_IOERR; } ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg); gs_gui_functions->Enable_Events(this); /* allow a socket to re-bind if the socket is in the TIME_WAIT state after being previously closed. */ if (m_reusable) { setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg)); } /* Bind to the local address, * retrieve the actual address bound, * and listen up to 5 connections. */ if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) || (getsockname(m_fd, m_local->m_addr, (WX_SOCKLEN_T *)&m_local->m_len) != 0) || (listen(m_fd, 5) != 0)) { Close(); m_error = GSOCK_IOERR; return GSOCK_IOERR; } return GSOCK_NOERROR; } /* GSocket_WaitConnection: * Waits for an incoming client connection. Returns a pointer to * a GSocket object, or NULL if there was an error, in which case * the last error field will be updated for the calling GSocket. * * Error codes (set in the calling GSocket) * GSOCK_INVSOCK - the socket is not valid or not a server. * GSOCK_TIMEDOUT - timeout, no incoming connections. * GSOCK_WOULDBLOCK - the call would block and the socket is nonblocking. * GSOCK_MEMERR - couldn't allocate memory. * GSOCK_IOERR - low-level error. */ GSocket *GSocket::WaitConnection() { GSocket *connection; struct sockaddr from; WX_SOCKLEN_T fromlen = sizeof(from); GSocketError err; u_long arg = 1; assert(this); /* Reenable CONNECTION events */ m_detected &= ~GSOCK_CONNECTION_FLAG; /* If the socket has already been created, we exit immediately */ if (m_fd == INVALID_SOCKET || !m_server) { m_error = GSOCK_INVSOCK; return NULL; } /* Create a GSocket object for the new connection */ connection = GSocket_new(); if (!connection) { m_error = GSOCK_MEMERR; return NULL; } /* Wait for a connection (with timeout) */ if (Input_Timeout() == GSOCK_TIMEDOUT) { delete connection; /* m_error set by _GSocket_Input_Timeout */ return NULL; } connection->m_fd = accept(m_fd, &from, &fromlen); if (connection->m_fd == INVALID_SOCKET) { if (WSAGetLastError() == WSAEWOULDBLOCK) m_error = GSOCK_WOULDBLOCK; else m_error = GSOCK_IOERR; delete connection; return NULL; } /* Initialize all fields */ connection->m_server = false; connection->m_stream = true; /* Setup the peer address field */ connection->m_peer = GAddress_new(); if (!connection->m_peer) { delete connection; m_error = GSOCK_MEMERR; return NULL; } err = _GAddress_translate_from(connection->m_peer, &from, fromlen); if (err != GSOCK_NOERROR) { GAddress_destroy(connection->m_peer); delete connection; m_error = err; return NULL; } ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg); gs_gui_functions->Enable_Events(connection); return connection; } /* GSocket_SetReusable: * Simply sets the m_resuable flag on the socket. GSocket_SetServer will * make the appropriate setsockopt() call. * Implemented as a GSocket function because clients (ie, wxSocketServer) * don't have access to the GSocket struct information. * Returns true if the flag was set correctly, false if an error occurred * (ie, if the parameter was NULL) */ bool GSocket::SetReusable() { /* socket must not be null, and must not be in use/already bound */ if (this && m_fd == INVALID_SOCKET) { m_reusable = true; return true; } return false; } /* Client specific parts */ /* GSocket_Connect: * For stream (connection oriented) sockets, GSocket_Connect() tries * to establish a client connection to a server using the peer address * as established with GSocket_SetPeer(). Returns GSOCK_NOERROR if the * connection has been successfully established, or one of the error * codes listed below. Note that for nonblocking sockets, a return * value of GSOCK_WOULDBLOCK doesn't mean a failure. The connection * request can be completed later; you should use GSocket_Select() * to poll for GSOCK_CONNECTION | GSOCK_LOST, or wait for the * corresponding asynchronous events. * * For datagram (non connection oriented) sockets, GSocket_Connect() * just sets the peer address established with GSocket_SetPeer() as * default destination. * * Error codes: * GSOCK_INVSOCK - the socket is in use or not valid. * GSOCK_INVADDR - the peer address has not been established. * GSOCK_TIMEDOUT - timeout, the connection failed. * GSOCK_WOULDBLOCK - connection in progress (nonblocking sockets only) * GSOCK_MEMERR - couldn't allocate memory. * GSOCK_IOERR - low-level error. */ GSocketError GSocket::Connect(GSocketStream stream) { int ret, err; u_long arg = 1; assert(this); /* Enable CONNECTION events (needed for nonblocking connections) */ m_detected &= ~GSOCK_CONNECTION_FLAG; if (m_fd != INVALID_SOCKET) { m_error = GSOCK_INVSOCK; return GSOCK_INVSOCK; } if (!m_peer) { m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } /* Streamed or dgram socket? */ m_stream = (stream == GSOCK_STREAMED); m_server = false; m_establishing = false; /* Create the socket */ m_fd = socket(m_peer->m_realfamily, m_stream? SOCK_STREAM : SOCK_DGRAM, 0); if (m_fd == INVALID_SOCKET) { m_error = GSOCK_IOERR; return GSOCK_IOERR; } ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg); gs_gui_functions->Enable_Events(this); // If the reuse flag is set, use the applicable socket reuse flag if (m_reusable) { setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg)); } // If a local address has been set, then we need to bind to it before calling connect if (m_local && m_local->m_addr) { bind(m_fd, m_local->m_addr, m_local->m_len); } /* Connect it to the peer address, with a timeout (see below) */ ret = connect(m_fd, m_peer->m_addr, m_peer->m_len); if (ret == SOCKET_ERROR) { err = WSAGetLastError(); /* If connect failed with EWOULDBLOCK and the GSocket object * is in blocking mode, we select() for the specified timeout * checking for writability to see if the connection request * completes. */ if ((err == WSAEWOULDBLOCK) && (!m_non_blocking)) { err = Connect_Timeout(); if (err != GSOCK_NOERROR) { Close(); /* m_error is set in _GSocket_Connect_Timeout */ } return (GSocketError) err; } /* If connect failed with EWOULDBLOCK and the GSocket object * is set to nonblocking, we set m_error to GSOCK_WOULDBLOCK * (and return GSOCK_WOULDBLOCK) but we don't close the socket; * this way if the connection completes, a GSOCK_CONNECTION * event will be generated, if enabled. */ if ((err == WSAEWOULDBLOCK) && (m_non_blocking)) { m_establishing = true; m_error = GSOCK_WOULDBLOCK; return GSOCK_WOULDBLOCK; } /* If connect failed with an error other than EWOULDBLOCK, * then the call to GSocket_Connect() has failed. */ Close(); m_error = GSOCK_IOERR; return GSOCK_IOERR; } return GSOCK_NOERROR; } /* Datagram sockets */ /* GSocket_SetNonOriented: * Sets up this socket as a non-connection oriented (datagram) socket. * Before using this function, the local address must have been set * with GSocket_SetLocal(), or the call will fail. Returns GSOCK_NOERROR * on success, or one of the following otherwise. * * Error codes: * GSOCK_INVSOCK - the socket is in use. * GSOCK_INVADDR - the local address has not been set. * GSOCK_IOERR - low-level error. */ GSocketError GSocket::SetNonOriented() { u_long arg = 1; assert(this); if (m_fd != INVALID_SOCKET) { m_error = GSOCK_INVSOCK; return GSOCK_INVSOCK; } if (!m_local) { m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } /* Initialize all fields */ m_stream = false; m_server = false; /* Create the socket */ m_fd = socket(m_local->m_realfamily, SOCK_DGRAM, 0); if (m_fd == INVALID_SOCKET) { m_error = GSOCK_IOERR; return GSOCK_IOERR; } ioctlsocket(m_fd, FIONBIO, (u_long FAR *) &arg); gs_gui_functions->Enable_Events(this); if (m_reusable) { setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(arg)); } /* Bind to the local address, * and retrieve the actual address bound. */ if ((bind(m_fd, m_local->m_addr, m_local->m_len) != 0) || (getsockname(m_fd, m_local->m_addr, (WX_SOCKLEN_T *)&m_local->m_len) != 0)) { Close(); m_error = GSOCK_IOERR; return GSOCK_IOERR; } return GSOCK_NOERROR; } /* Generic IO */ /* Like recv(), send(), ... */ int GSocket::Read(char *buffer, int size) { int ret; assert(this); /* Reenable INPUT events */ m_detected &= ~GSOCK_INPUT_FLAG; if (m_fd == INVALID_SOCKET || m_server) { m_error = GSOCK_INVSOCK; return -1; } /* If the socket is blocking, wait for data (with a timeout) */ if (Input_Timeout() == GSOCK_TIMEDOUT) { m_error = GSOCK_TIMEDOUT; return -1; } /* Read the data */ if (m_stream) ret = Recv_Stream(buffer, size); else ret = Recv_Dgram(buffer, size); if (ret == SOCKET_ERROR) { if (WSAGetLastError() != WSAEWOULDBLOCK) m_error = GSOCK_IOERR; else m_error = GSOCK_WOULDBLOCK; return -1; } return ret; } int GSocket::Write(const char *buffer, int size) { int ret; assert(this); if (m_fd == INVALID_SOCKET || m_server) { m_error = GSOCK_INVSOCK; return -1; } /* If the socket is blocking, wait for writability (with a timeout) */ if (Output_Timeout() == GSOCK_TIMEDOUT) return -1; /* Write the data */ if (m_stream) ret = Send_Stream(buffer, size); else ret = Send_Dgram(buffer, size); if (ret == SOCKET_ERROR) { if (WSAGetLastError() != WSAEWOULDBLOCK) m_error = GSOCK_IOERR; else m_error = GSOCK_WOULDBLOCK; /* Only reenable OUTPUT events after an error (just like WSAAsyncSelect * does). Once the first OUTPUT event is received, users can assume * that the socket is writable until a read operation fails. Only then * will further OUTPUT events be posted. */ m_detected &= ~GSOCK_OUTPUT_FLAG; return -1; } return ret; } /* GSocket_Select: * Polls the socket to determine its status. This function will * check for the events specified in the 'flags' parameter, and * it will return a mask indicating which operations can be * performed. This function won't block, regardless of the * mode (blocking | nonblocking) of the socket. */ GSocketEventFlags GSocket::Select(GSocketEventFlags flags) { if (!gs_gui_functions->CanUseEventLoop()) { GSocketEventFlags result = 0; fd_set readfds; fd_set writefds; fd_set exceptfds; assert(this); FD_ZERO(&readfds); FD_ZERO(&writefds); FD_ZERO(&exceptfds); FD_SET(m_fd, &readfds); if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG) FD_SET(m_fd, &writefds); FD_SET(m_fd, &exceptfds); /* Check 'sticky' CONNECTION flag first */ result |= (GSOCK_CONNECTION_FLAG & m_detected); /* If we have already detected a LOST event, then don't try * to do any further processing. */ if ((m_detected & GSOCK_LOST_FLAG) != 0) { m_establishing = false; return (GSOCK_LOST_FLAG & flags); } /* Try select now */ if (select(m_fd + 1, &readfds, &writefds, &exceptfds, &m_timeout) <= 0) { /* What to do here? */ return (result & flags); } /* Check for exceptions and errors */ if (FD_ISSET(m_fd, &exceptfds)) { m_establishing = false; m_detected = GSOCK_LOST_FLAG; /* LOST event: Abort any further processing */ return (GSOCK_LOST_FLAG & flags); } /* Check for readability */ if (FD_ISSET(m_fd, &readfds)) { result |= GSOCK_INPUT_FLAG; if (m_server && m_stream) { /* This is a TCP server socket that detected a connection. While the INPUT_FLAG is also set, it doesn't matter on this kind of sockets, as we can only Accept() from them. */ result |= GSOCK_CONNECTION_FLAG; m_detected |= GSOCK_CONNECTION_FLAG; } } /* Check for writability */ if (FD_ISSET(m_fd, &writefds)) { if (m_establishing && !m_server) { int error; WX_SOCKLEN_T len = sizeof(error); m_establishing = false; getsockopt(m_fd, SOL_SOCKET, SO_ERROR, (char*)&error, &len); if (error) { m_detected = GSOCK_LOST_FLAG; /* LOST event: Abort any further processing */ return (GSOCK_LOST_FLAG & flags); } else { result |= GSOCK_CONNECTION_FLAG; m_detected |= GSOCK_CONNECTION_FLAG; } } else { result |= GSOCK_OUTPUT_FLAG; } } return (result & flags); } else /* USE_GUI() */ { assert(this); return flags & m_detected; } } /* Attributes */ /* GSocket_SetNonBlocking: * Sets the socket to non-blocking mode. All IO calls will return * immediately. */ void GSocket::SetNonBlocking(bool non_block) { assert(this); m_non_blocking = non_block; } /* GSocket_SetTimeout: * Sets the timeout for blocking calls. Time is expressed in * milliseconds. */ void GSocket::SetTimeout(unsigned long millis) { assert(this); m_timeout.tv_sec = (millis / 1000); m_timeout.tv_usec = (millis % 1000) * 1000; } /* GSocket_GetError: * Returns the last error occurred for this socket. Note that successful * operations do not clear this back to GSOCK_NOERROR, so use it only * after an error. */ GSocketError WXDLLIMPEXP_NET GSocket::GetError() { assert(this); return m_error; } /* Callbacks */ /* GSOCK_INPUT: * There is data to be read in the input buffer. If, after a read * operation, there is still data available, the callback function will * be called again. * GSOCK_OUTPUT: * The socket is available for writing. That is, the next write call * won't block. This event is generated only once, when the connection is * first established, and then only if a call failed with GSOCK_WOULDBLOCK, * when the output buffer empties again. This means that the app should * assume that it can write since the first OUTPUT event, and no more * OUTPUT events will be generated unless an error occurs. * GSOCK_CONNECTION: * Connection successfully established, for client sockets, or incoming * client connection, for server sockets. Wait for this event (also watch * out for GSOCK_LOST) after you issue a nonblocking GSocket_Connect() call. * GSOCK_LOST: * The connection is lost (or a connection request failed); this could * be due to a failure, or due to the peer closing it gracefully. */ /* GSocket_SetCallback: * Enables the callbacks specified by 'flags'. Note that 'flags' * may be a combination of flags OR'ed toghether, so the same * callback function can be made to accept different events. * The callback function must have the following prototype: * * void function(GSocket *socket, GSocketEvent event, char *cdata) */ void GSocket::SetCallback(GSocketEventFlags flags, GSocketCallback callback, char *cdata) { int count; assert(this); for (count = 0; count < GSOCK_MAX_EVENT; count++) { if ((flags & (1 << count)) != 0) { m_cbacks[count] = callback; m_data[count] = cdata; } } } /* GSocket_UnsetCallback: * Disables all callbacks specified by 'flags', which may be a * combination of flags OR'ed toghether. */ void GSocket::UnsetCallback(GSocketEventFlags flags) { int count; assert(this); for (count = 0; count < GSOCK_MAX_EVENT; count++) { if ((flags & (1 << count)) != 0) { m_cbacks[count] = NULL; m_data[count] = NULL; } } } GSocketError GSocket::GetSockOpt(int level, int optname, void *optval, int *optlen) { if (getsockopt(m_fd, level, optname, (char*)optval, optlen) == 0) { return GSOCK_NOERROR; } return GSOCK_OPTERR; } GSocketError GSocket::SetSockOpt(int level, int optname, const void *optval, int optlen) { if (setsockopt(m_fd, level, optname, (char*)optval, optlen) == 0) { return GSOCK_NOERROR; } return GSOCK_OPTERR; } /* Internals (IO) */ /* _GSocket_Input_Timeout: * For blocking sockets, wait until data is available or * until timeout ellapses. */ GSocketError GSocket::Input_Timeout() { fd_set readfds; if (!m_non_blocking) { FD_ZERO(&readfds); FD_SET(m_fd, &readfds); if (select(0, &readfds, NULL, NULL, &m_timeout) == 0) { m_error = GSOCK_TIMEDOUT; return GSOCK_TIMEDOUT; } } return GSOCK_NOERROR; } /* _GSocket_Output_Timeout: * For blocking sockets, wait until data can be sent without * blocking or until timeout ellapses. */ GSocketError GSocket::Output_Timeout() { fd_set writefds; if (!m_non_blocking) { FD_ZERO(&writefds); FD_SET(m_fd, &writefds); if (select(0, NULL, &writefds, NULL, &m_timeout) == 0) { m_error = GSOCK_TIMEDOUT; return GSOCK_TIMEDOUT; } } return GSOCK_NOERROR; } /* _GSocket_Connect_Timeout: * For blocking sockets, wait until the connection is * established or fails, or until timeout ellapses. */ GSocketError GSocket::Connect_Timeout() { fd_set writefds; fd_set exceptfds; FD_ZERO(&writefds); FD_ZERO(&exceptfds); FD_SET(m_fd, &writefds); FD_SET(m_fd, &exceptfds); if (select(0, NULL, &writefds, &exceptfds, &m_timeout) == 0) { m_error = GSOCK_TIMEDOUT; return GSOCK_TIMEDOUT; } if (!FD_ISSET(m_fd, &writefds)) { m_error = GSOCK_IOERR; return GSOCK_IOERR; } return GSOCK_NOERROR; } int GSocket::Recv_Stream(char *buffer, int size) { return recv(m_fd, buffer, size, 0); } int GSocket::Recv_Dgram(char *buffer, int size) { struct sockaddr from; WX_SOCKLEN_T fromlen = sizeof(from); int ret; GSocketError err; ret = recvfrom(m_fd, buffer, size, 0, &from, &fromlen); if (ret == SOCKET_ERROR) return SOCKET_ERROR; /* Translate a system address into a GSocket address */ if (!m_peer) { m_peer = GAddress_new(); if (!m_peer) { m_error = GSOCK_MEMERR; return -1; } } err = _GAddress_translate_from(m_peer, &from, fromlen); if (err != GSOCK_NOERROR) { GAddress_destroy(m_peer); m_peer = NULL; m_error = err; return -1; } return ret; } int GSocket::Send_Stream(const char *buffer, int size) { return send(m_fd, buffer, size, 0); } int GSocket::Send_Dgram(const char *buffer, int size) { struct sockaddr *addr; int len, ret; GSocketError err; if (!m_peer) { m_error = GSOCK_INVADDR; return -1; } err = _GAddress_translate_to(m_peer, &addr, &len); if (err != GSOCK_NOERROR) { m_error = err; return -1; } ret = sendto(m_fd, buffer, size, 0, addr, len); /* Frees memory allocated by _GAddress_translate_to */ free(addr); return ret; } /* Compatibility functions for GSocket */ GSocket *GSocket_new(void) { GSocket *newsocket = new GSocket(); if(newsocket->IsOk()) return newsocket; delete newsocket; return NULL; } /* * ------------------------------------------------------------------------- * GAddress * ------------------------------------------------------------------------- */ /* CHECK_ADDRESS verifies that the current address family is either * GSOCK_NOFAMILY or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it * initalizes it to be a GSOCK_*family*. In other cases, it returns * an appropiate error code. * * CHECK_ADDRESS_RETVAL does the same but returning 'retval' on error. */ #define CHECK_ADDRESS(address, family) \ { \ if (address->m_family == GSOCK_NOFAMILY) \ if (_GAddress_Init_##family(address) != GSOCK_NOERROR) \ return address->m_error; \ if (address->m_family != GSOCK_##family) \ { \ address->m_error = GSOCK_INVADDR; \ return GSOCK_INVADDR; \ } \ } #define CHECK_ADDRESS_RETVAL(address, family, retval) \ { \ if (address->m_family == GSOCK_NOFAMILY) \ if (_GAddress_Init_##family(address) != GSOCK_NOERROR) \ return retval; \ if (address->m_family != GSOCK_##family) \ { \ address->m_error = GSOCK_INVADDR; \ return retval; \ } \ } GAddress *GAddress_new(void) { GAddress *address; if ((address = (GAddress *) malloc(sizeof(GAddress))) == NULL) return NULL; address->m_family = GSOCK_NOFAMILY; address->m_addr = NULL; address->m_len = 0; return address; } GAddress *GAddress_copy(GAddress *address) { GAddress *addr2; assert(address != NULL); if ((addr2 = (GAddress *) malloc(sizeof(GAddress))) == NULL) return NULL; memcpy(addr2, address, sizeof(GAddress)); if (address->m_addr) { addr2->m_addr = (struct sockaddr *) malloc(addr2->m_len); if (addr2->m_addr == NULL) { free(addr2); return NULL; } memcpy(addr2->m_addr, address->m_addr, addr2->m_len); } return addr2; } void GAddress_destroy(GAddress *address) { assert(address != NULL); if (address->m_addr) free(address->m_addr); free(address); } void GAddress_SetFamily(GAddress *address, GAddressType type) { assert(address != NULL); address->m_family = type; } GAddressType GAddress_GetFamily(GAddress *address) { assert(address != NULL); return address->m_family; } GSocketError _GAddress_translate_from(GAddress *address, struct sockaddr *addr, int len) { address->m_realfamily = addr->sa_family; switch (addr->sa_family) { case AF_INET: address->m_family = GSOCK_INET; break; case AF_UNIX: address->m_family = GSOCK_UNIX; break; #ifdef AF_INET6 case AF_INET6: address->m_family = GSOCK_INET6; break; #endif default: { address->m_error = GSOCK_INVOP; return GSOCK_INVOP; } } if (address->m_addr) free(address->m_addr); address->m_len = len; address->m_addr = (struct sockaddr *) malloc(len); if (address->m_addr == NULL) { address->m_error = GSOCK_MEMERR; return GSOCK_MEMERR; } memcpy(address->m_addr, addr, len); return GSOCK_NOERROR; } GSocketError _GAddress_translate_to(GAddress *address, struct sockaddr **addr, int *len) { if (!address->m_addr) { address->m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } *len = address->m_len; *addr = (struct sockaddr *) malloc(address->m_len); if (*addr == NULL) { address->m_error = GSOCK_MEMERR; return GSOCK_MEMERR; } memcpy(*addr, address->m_addr, address->m_len); return GSOCK_NOERROR; } /* * ------------------------------------------------------------------------- * Internet address family * ------------------------------------------------------------------------- */ GSocketError _GAddress_Init_INET(GAddress *address) { address->m_len = sizeof(struct sockaddr_in); address->m_addr = (struct sockaddr *) malloc(address->m_len); if (address->m_addr == NULL) { address->m_error = GSOCK_MEMERR; return GSOCK_MEMERR; } address->m_family = GSOCK_INET; address->m_realfamily = AF_INET; ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET; ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY; return GSOCK_NOERROR; } GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname) { struct hostent *he; struct in_addr *addr; assert(address != NULL); CHECK_ADDRESS(address, INET); addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr); addr->s_addr = inet_addr(hostname); /* If it is a numeric host name, convert it now */ if (addr->s_addr == INADDR_NONE) { struct in_addr *array_addr; /* It is a real name, we solve it */ if ((he = gethostbyname(hostname)) == NULL) { /* addr->s_addr = INADDR_NONE just done by inet_addr() above */ address->m_error = GSOCK_NOHOST; return GSOCK_NOHOST; } array_addr = (struct in_addr *) *(he->h_addr_list); addr->s_addr = array_addr[0].s_addr; } return GSOCK_NOERROR; } GSocketError GAddress_INET_SetAnyAddress(GAddress *address) { return GAddress_INET_SetHostAddress(address, INADDR_ANY); } GSocketError GAddress_INET_SetHostAddress(GAddress *address, unsigned long hostaddr) { struct in_addr *addr; assert(address != NULL); CHECK_ADDRESS(address, INET); addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr); addr->s_addr = htonl(hostaddr); return GSOCK_NOERROR; } GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port, const char *protocol) { struct servent *se; struct sockaddr_in *addr; assert(address != NULL); CHECK_ADDRESS(address, INET); if (!port) { address->m_error = GSOCK_INVPORT; return GSOCK_INVPORT; } se = getservbyname(port, protocol); if (!se) { if (isdigit((unsigned char) port[0])) { int port_int; port_int = atoi(port); addr = (struct sockaddr_in *)address->m_addr; addr->sin_port = htons((u_short) port_int); return GSOCK_NOERROR; } address->m_error = GSOCK_INVPORT; return GSOCK_INVPORT; } addr = (struct sockaddr_in *)address->m_addr; addr->sin_port = se->s_port; return GSOCK_NOERROR; } GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port) { struct sockaddr_in *addr; assert(address != NULL); CHECK_ADDRESS(address, INET); addr = (struct sockaddr_in *)address->m_addr; addr->sin_port = htons(port); return GSOCK_NOERROR; } GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t sbuf) { struct hostent *he; char *addr_buf; struct sockaddr_in *addr; assert(address != NULL); CHECK_ADDRESS(address, INET); addr = (struct sockaddr_in *)address->m_addr; addr_buf = (char *)&(addr->sin_addr); he = gethostbyaddr(addr_buf, sizeof(addr->sin_addr), AF_INET); if (he == NULL) { address->m_error = GSOCK_NOHOST; return GSOCK_NOHOST; } strncpy(hostname, he->h_name, sbuf); return GSOCK_NOERROR; } unsigned long GAddress_INET_GetHostAddress(GAddress *address) { struct sockaddr_in *addr; assert(address != NULL); CHECK_ADDRESS_RETVAL(address, INET, 0); addr = (struct sockaddr_in *)address->m_addr; return ntohl(addr->sin_addr.s_addr); } unsigned short GAddress_INET_GetPort(GAddress *address) { struct sockaddr_in *addr; assert(address != NULL); CHECK_ADDRESS_RETVAL(address, INET, 0); addr = (struct sockaddr_in *)address->m_addr; return ntohs(addr->sin_port); } /* * ------------------------------------------------------------------------- * Unix address family * ------------------------------------------------------------------------- */ GSocketError _GAddress_Init_UNIX(GAddress *address) { assert (address != NULL); address->m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } GSocketError GAddress_UNIX_SetPath(GAddress *address, const char *WXUNUSED(path)) { assert (address != NULL); address->m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } GSocketError GAddress_UNIX_GetPath(GAddress *address, char *WXUNUSED(path), size_t WXUNUSED(sbuf)) { assert (address != NULL); address->m_error = GSOCK_INVADDR; return GSOCK_INVADDR; } #else /* !wxUSE_SOCKETS */ /* * Translation unit shouldn't be empty, so include this typedef to make the * compiler (VC++ 6.0, for example) happy */ typedef void (*wxDummy)(); #endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */