From f7ff39c6ac67b995c13900af1b6a4b32e8c7f9f2 Mon Sep 17 00:00:00 2001 From: David Elliott Date: Thu, 29 Jul 2004 02:03:44 +0000 Subject: [PATCH] Copied from src/msw/gsocket.c revision 1.61 git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28535 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775 --- src/msw/gsocket.cpp | 1553 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1553 insertions(+) create mode 100644 src/msw/gsocket.cpp diff --git a/src/msw/gsocket.cpp b/src/msw/gsocket.cpp new file mode 100644 index 0000000000..74783e0b1b --- /dev/null +++ b/src/msw/gsocket.cpp @@ -0,0 +1,1553 @@ +/* ------------------------------------------------------------------------- + * Project: GSocket (Generic Socket) + * Name: gsocket.c + * Author: Guillermo Rodriguez Garcia + * Purpose: GSocket main MSW file + * Licence: The wxWidgets licence + * CVSID: $Id$ + * ------------------------------------------------------------------------- + */ + +/* + * PLEASE don't put C++ comments here - this is a C source file. + */ + +#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 */ + +#include + +#ifndef __GSOCKET_STANDALONE__ +# include "wx/platform.h" +# include "wx/setup.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 SOCKLEN_T will be already defined */ +#ifndef SOCKLEN_T +# define SOCKLEN_T int +#endif + +/* Table of GUI-related functions. We must call them indirectly because + * of wxBase and GUI separation: */ + +static struct GSocketGUIFunctionsTable *gs_gui_functions; + +#define USE_GUI() (gs_gui_functions != NULL) + +/* Define macros to simplify indirection: */ +#define _GSocket_GUI_Init() \ + if (gs_gui_functions) gs_gui_functions->GUI_Init() +#define _GSocket_GUI_Cleanup() \ + if (gs_gui_functions) gs_gui_functions->GUI_Cleanup() +#define _GSocket_GUI_Init_Socket(socket) \ + (gs_gui_functions ? gs_gui_functions->GUI_Init_Socket(socket) : 1) +#define _GSocket_GUI_Destroy_Socket(socket) \ + if (gs_gui_functions) gs_gui_functions->GUI_Destroy_Socket(socket) +#define _GSocket_Enable_Events(socket) \ + if (gs_gui_functions) gs_gui_functions->Enable_Events(socket) +#define _GSocket_Disable_Events(socket) \ + if (gs_gui_functions) gs_gui_functions->Disable_Events(socket) +#define _GSocket_Install_Callback(socket, event) \ + if (gs_gui_functions) gs_gui_functions->Install_Callback(socket, event) +#define _GSocket_Uninstall_Callback(socket, event) \ + if (gs_gui_functions) gs_gui_functions->Uninstall_Callback(socket, event) + +/* Global initialisers */ + +void GSocket_SetGUIFunctions(struct GSocketGUIFunctionsTable *guifunc) +{ + gs_gui_functions = guifunc; +} + +int GSocket_Init(void) +{ + WSADATA wsaData; + + if (gs_gui_functions) + { + if ( !gs_gui_functions->GUI_Init() ) + return 0; + } + + /* Initialize WinSocket */ + return (WSAStartup((1 << 8) | 1, &wsaData) == 0); +} + +void GSocket_Cleanup(void) +{ + if (gs_gui_functions) + { + gs_gui_functions->GUI_Cleanup(); + } + + /* Cleanup WinSocket */ + WSACleanup(); +} + +/* Constructors / Destructors for GSocket */ + +GSocket *GSocket_new(void) +{ + int i, success; + GSocket *socket; + + if ((socket = (GSocket *) malloc(sizeof(GSocket))) == NULL) + return NULL; + + socket->m_fd = INVALID_SOCKET; + for (i = 0; i < GSOCK_MAX_EVENT; i++) + { + socket->m_cbacks[i] = NULL; + } + socket->m_detected = 0; + socket->m_local = NULL; + socket->m_peer = NULL; + socket->m_error = GSOCK_NOERROR; + socket->m_server = FALSE; + socket->m_stream = TRUE; + socket->m_non_blocking = FALSE; + socket->m_timeout.tv_sec = 10 * 60; /* 10 minutes */ + socket->m_timeout.tv_usec = 0; + socket->m_establishing = FALSE; + socket->m_reusable = FALSE; + + /* Per-socket GUI-specific initialization */ + success = _GSocket_GUI_Init_Socket(socket); + if (!success) + { + free(socket); + socket = NULL; + } + + return socket; +} + +void GSocket_close(GSocket *socket) +{ + _GSocket_Disable_Events(socket); + closesocket(socket->m_fd); + socket->m_fd = INVALID_SOCKET; +} + +void GSocket_destroy(GSocket *socket) +{ + assert(socket != NULL); + + /* Per-socket GUI-specific cleanup */ + _GSocket_GUI_Destroy_Socket(socket); + + /* Check that the socket is really shutdowned */ + if (socket->m_fd != INVALID_SOCKET) + GSocket_Shutdown(socket); + + /* Destroy private addresses */ + if (socket->m_local) + GAddress_destroy(socket->m_local); + + if (socket->m_peer) + GAddress_destroy(socket->m_peer); + + /* Destroy the socket itself */ + free(socket); +} + +/* GSocket_Shutdown: + * Disallow further read/write operations on this socket, close + * the fd and disable all callbacks. + */ +void GSocket_Shutdown(GSocket *socket) +{ + int evt; + + assert(socket != NULL); + + /* If socket has been created, shutdown it */ + if (socket->m_fd != INVALID_SOCKET) + { + shutdown(socket->m_fd, 2); + GSocket_close(socket); + } + + /* Disable GUI callbacks */ + for (evt = 0; evt < GSOCK_MAX_EVENT; evt++) + socket->m_cbacks[evt] = NULL; + + socket->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(GSocket *socket, GAddress *address) +{ + assert(socket != NULL); + + /* the socket must be initialized, or it must be a server */ + if (socket->m_fd != INVALID_SOCKET && !socket->m_server) + { + socket->m_error = GSOCK_INVSOCK; + return GSOCK_INVSOCK; + } + + /* check address */ + if (address == NULL || address->m_family == GSOCK_NOFAMILY) + { + socket->m_error = GSOCK_INVADDR; + return GSOCK_INVADDR; + } + + if (socket->m_local) + GAddress_destroy(socket->m_local); + + socket->m_local = GAddress_copy(address); + + return GSOCK_NOERROR; +} + +GSocketError GSocket_SetPeer(GSocket *socket, GAddress *address) +{ + assert(socket != NULL); + + /* check address */ + if (address == NULL || address->m_family == GSOCK_NOFAMILY) + { + socket->m_error = GSOCK_INVADDR; + return GSOCK_INVADDR; + } + + if (socket->m_peer) + GAddress_destroy(socket->m_peer); + + socket->m_peer = GAddress_copy(address); + + return GSOCK_NOERROR; +} + +GAddress *GSocket_GetLocal(GSocket *socket) +{ + GAddress *address; + struct sockaddr addr; + SOCKLEN_T size = sizeof(addr); + GSocketError err; + + assert(socket != NULL); + + /* try to get it from the m_local var first */ + if (socket->m_local) + return GAddress_copy(socket->m_local); + + /* else, if the socket is initialized, try getsockname */ + if (socket->m_fd == INVALID_SOCKET) + { + socket->m_error = GSOCK_INVSOCK; + return NULL; + } + + if (getsockname(socket->m_fd, &addr, &size) == SOCKET_ERROR) + { + socket->m_error = GSOCK_IOERR; + return NULL; + } + + /* got a valid address from getsockname, create a GAddress object */ + if ((address = GAddress_new()) == NULL) + { + socket->m_error = GSOCK_MEMERR; + return NULL; + } + + if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR) + { + GAddress_destroy(address); + socket->m_error = err; + return NULL; + } + + return address; +} + +GAddress *GSocket_GetPeer(GSocket *socket) +{ + assert(socket != NULL); + + /* try to get it from the m_peer var */ + if (socket->m_peer) + return GAddress_copy(socket->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(GSocket *sck) +{ + u_long arg = 1; + + assert(sck != NULL); + + /* must not be in use */ + if (sck->m_fd != INVALID_SOCKET) + { + sck->m_error = GSOCK_INVSOCK; + return GSOCK_INVSOCK; + } + + /* the local addr must have been set */ + if (!sck->m_local) + { + sck->m_error = GSOCK_INVADDR; + return GSOCK_INVADDR; + } + + /* Initialize all fields */ + sck->m_server = TRUE; + sck->m_stream = TRUE; + + /* Create the socket */ + sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_STREAM, 0); + + if (sck->m_fd == INVALID_SOCKET) + { + sck->m_error = GSOCK_IOERR; + return GSOCK_IOERR; + } + + ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg); + _GSocket_Enable_Events(sck); + + /* allow a socket to re-bind if the socket is in the TIME_WAIT + state after being previously closed. + */ + if (sck->m_reusable) { + setsockopt(sck->m_fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&arg, sizeof(u_long)); + } + + /* Bind to the local address, + * retrieve the actual address bound, + * and listen up to 5 connections. + */ + if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) || + (getsockname(sck->m_fd, + sck->m_local->m_addr, + (SOCKLEN_T *)&sck->m_local->m_len) != 0) || + (listen(sck->m_fd, 5) != 0)) + { + GSocket_close(sck); + sck->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 *sck) +{ + GSocket *connection; + struct sockaddr from; + SOCKLEN_T fromlen = sizeof(from); + GSocketError err; + u_long arg = 1; + + assert(sck != NULL); + + /* Reenable CONNECTION events */ + sck->m_detected &= ~GSOCK_CONNECTION_FLAG; + + /* If the socket has already been created, we exit immediately */ + if (sck->m_fd == INVALID_SOCKET || !sck->m_server) + { + sck->m_error = GSOCK_INVSOCK; + return NULL; + } + + /* Create a GSocket object for the new connection */ + connection = GSocket_new(); + + if (!connection) + { + sck->m_error = GSOCK_MEMERR; + return NULL; + } + + /* Wait for a connection (with timeout) */ + if (_GSocket_Input_Timeout(sck) == GSOCK_TIMEDOUT) + { + GSocket_destroy(connection); + /* sck->m_error set by _GSocket_Input_Timeout */ + return NULL; + } + + connection->m_fd = accept(sck->m_fd, &from, &fromlen); + + if (connection->m_fd == INVALID_SOCKET) + { + if (WSAGetLastError() == WSAEWOULDBLOCK) + sck->m_error = GSOCK_WOULDBLOCK; + else + sck->m_error = GSOCK_IOERR; + + GSocket_destroy(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) + { + GSocket_destroy(connection); + sck->m_error = GSOCK_MEMERR; + return NULL; + } + err = _GAddress_translate_from(connection->m_peer, &from, fromlen); + if (err != GSOCK_NOERROR) + { + GAddress_destroy(connection->m_peer); + GSocket_destroy(connection); + sck->m_error = err; + return NULL; + } + + ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg); + _GSocket_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 occured +* (ie, if the parameter was NULL) +*/ +int GSocket_SetReusable(GSocket *socket) +{ + /* socket must not be null, and must not be in use/already bound */ + if (NULL != socket && socket->m_fd == INVALID_SOCKET) { + 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 succesfully 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(GSocket *sck, GSocketStream stream) +{ + int ret, err; + u_long arg = 1; + + assert(sck != NULL); + + /* Enable CONNECTION events (needed for nonblocking connections) */ + sck->m_detected &= ~GSOCK_CONNECTION_FLAG; + + if (sck->m_fd != INVALID_SOCKET) + { + sck->m_error = GSOCK_INVSOCK; + return GSOCK_INVSOCK; + } + + if (!sck->m_peer) + { + sck->m_error = GSOCK_INVADDR; + return GSOCK_INVADDR; + } + + /* Streamed or dgram socket? */ + sck->m_stream = (stream == GSOCK_STREAMED); + sck->m_server = FALSE; + sck->m_establishing = FALSE; + + /* Create the socket */ + sck->m_fd = socket(sck->m_peer->m_realfamily, + sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0); + + if (sck->m_fd == INVALID_SOCKET) + { + sck->m_error = GSOCK_IOERR; + return GSOCK_IOERR; + } + + ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg); + _GSocket_Enable_Events(sck); + + /* Connect it to the peer address, with a timeout (see below) */ + ret = connect(sck->m_fd, sck->m_peer->m_addr, sck->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) && (!sck->m_non_blocking)) + { + err = _GSocket_Connect_Timeout(sck); + + if (err != GSOCK_NOERROR) + { + GSocket_close(sck); + /* sck->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) && (sck->m_non_blocking)) + { + sck->m_establishing = TRUE; + sck->m_error = GSOCK_WOULDBLOCK; + return GSOCK_WOULDBLOCK; + } + + /* If connect failed with an error other than EWOULDBLOCK, + * then the call to GSocket_Connect() has failed. + */ + GSocket_close(sck); + sck->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(GSocket *sck) +{ + u_long arg = 1; + + assert(sck != NULL); + + if (sck->m_fd != INVALID_SOCKET) + { + sck->m_error = GSOCK_INVSOCK; + return GSOCK_INVSOCK; + } + + if (!sck->m_local) + { + sck->m_error = GSOCK_INVADDR; + return GSOCK_INVADDR; + } + + /* Initialize all fields */ + sck->m_stream = FALSE; + sck->m_server = FALSE; + + /* Create the socket */ + sck->m_fd = socket(sck->m_local->m_realfamily, SOCK_DGRAM, 0); + + if (sck->m_fd == INVALID_SOCKET) + { + sck->m_error = GSOCK_IOERR; + return GSOCK_IOERR; + } + + ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg); + _GSocket_Enable_Events(sck); + + /* Bind to the local address, + * and retrieve the actual address bound. + */ + if ((bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) || + (getsockname(sck->m_fd, + sck->m_local->m_addr, + (SOCKLEN_T *)&sck->m_local->m_len) != 0)) + { + GSocket_close(sck); + sck->m_error = GSOCK_IOERR; + return GSOCK_IOERR; + } + + return GSOCK_NOERROR; +} + +/* Generic IO */ + +/* Like recv(), send(), ... */ +int GSocket_Read(GSocket *socket, char *buffer, int size) +{ + int ret; + + assert(socket != NULL); + + /* Reenable INPUT events */ + socket->m_detected &= ~GSOCK_INPUT_FLAG; + + if (socket->m_fd == INVALID_SOCKET || socket->m_server) + { + socket->m_error = GSOCK_INVSOCK; + return -1; + } + + /* If the socket is blocking, wait for data (with a timeout) */ + if (_GSocket_Input_Timeout(socket) == GSOCK_TIMEDOUT) + return -1; + + /* Read the data */ + if (socket->m_stream) + ret = _GSocket_Recv_Stream(socket, buffer, size); + else + ret = _GSocket_Recv_Dgram(socket, buffer, size); + + if (ret == SOCKET_ERROR) + { + if (WSAGetLastError() != WSAEWOULDBLOCK) + socket->m_error = GSOCK_IOERR; + else + socket->m_error = GSOCK_WOULDBLOCK; + return -1; + } + + return ret; +} + +int GSocket_Write(GSocket *socket, const char *buffer, int size) +{ + int ret; + + assert(socket != NULL); + + if (socket->m_fd == INVALID_SOCKET || socket->m_server) + { + socket->m_error = GSOCK_INVSOCK; + return -1; + } + + /* If the socket is blocking, wait for writability (with a timeout) */ + if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT) + return -1; + + /* Write the data */ + if (socket->m_stream) + ret = _GSocket_Send_Stream(socket, buffer, size); + else + ret = _GSocket_Send_Dgram(socket, buffer, size); + + if (ret == SOCKET_ERROR) + { + if (WSAGetLastError() != WSAEWOULDBLOCK) + socket->m_error = GSOCK_IOERR; + else + socket->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. + */ + socket->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(GSocket *socket, GSocketEventFlags flags) +{ + if (!USE_GUI()) + { + GSocketEventFlags result = 0; + fd_set readfds; + fd_set writefds; + fd_set exceptfds; + + assert(socket != NULL); + + FD_ZERO(&readfds); + FD_ZERO(&writefds); + FD_ZERO(&exceptfds); + FD_SET(socket->m_fd, &readfds); + if (flags & GSOCK_OUTPUT_FLAG || flags & GSOCK_CONNECTION_FLAG) + FD_SET(socket->m_fd, &writefds); + FD_SET(socket->m_fd, &exceptfds); + + /* Check 'sticky' CONNECTION flag first */ + result |= (GSOCK_CONNECTION_FLAG & socket->m_detected); + + /* If we have already detected a LOST event, then don't try + * to do any further processing. + */ + if ((socket->m_detected & GSOCK_LOST_FLAG) != 0) + { + socket->m_establishing = FALSE; + + return (GSOCK_LOST_FLAG & flags); + } + + /* Try select now */ + if (select(socket->m_fd + 1, &readfds, &writefds, &exceptfds, + &socket->m_timeout) <= 0) + { + /* What to do here? */ + return (result & flags); + } + + /* Check for readability */ + if (FD_ISSET(socket->m_fd, &readfds)) + { + char c; + + if (!socket->m_stream || recv(socket->m_fd, &c, 1, MSG_PEEK) > 0) + { + result |= GSOCK_INPUT_FLAG; + } + else + { + if (socket->m_server && socket->m_stream) + { + result |= GSOCK_CONNECTION_FLAG; + socket->m_detected |= GSOCK_CONNECTION_FLAG; + } + else + { + socket->m_detected = GSOCK_LOST_FLAG; + socket->m_establishing = FALSE; + + /* LOST event: Abort any further processing */ + return (GSOCK_LOST_FLAG & flags); + } + } + } + + /* Check for writability */ + if (FD_ISSET(socket->m_fd, &writefds)) + { + if (socket->m_establishing && !socket->m_server) + { + int error; + SOCKLEN_T len = sizeof(error); + + socket->m_establishing = FALSE; + + getsockopt(socket->m_fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len); + + if (error) + { + socket->m_detected = GSOCK_LOST_FLAG; + + /* LOST event: Abort any further processing */ + return (GSOCK_LOST_FLAG & flags); + } + else + { + result |= GSOCK_CONNECTION_FLAG; + socket->m_detected |= GSOCK_CONNECTION_FLAG; + } + } + else + { + result |= GSOCK_OUTPUT_FLAG; + } + } + + /* Check for exceptions and errors (is this useful in Unices?) */ + if (FD_ISSET(socket->m_fd, &exceptfds)) + { + socket->m_establishing = FALSE; + socket->m_detected = GSOCK_LOST_FLAG; + + /* LOST event: Abort any further processing */ + return (GSOCK_LOST_FLAG & flags); + } + + return (result & flags); + } + else /* USE_GUI() */ + { + assert(socket != NULL); + return flags & socket->m_detected; + } +} + +/* Attributes */ + +/* GSocket_SetNonBlocking: + * Sets the socket to non-blocking mode. All IO calls will return + * immediately. + */ +void GSocket_SetNonBlocking(GSocket *socket, int non_block) +{ + assert(socket != NULL); + + socket->m_non_blocking = non_block; +} + +/* GSocket_SetTimeout: + * Sets the timeout for blocking calls. Time is expressed in + * milliseconds. + */ +void GSocket_SetTimeout(GSocket *socket, unsigned long millis) +{ + assert(socket != NULL); + + socket->m_timeout.tv_sec = (millis / 1000); + socket->m_timeout.tv_usec = (millis % 1000) * 1000; +} + +/* GSocket_GetError: + * Returns the last error occured for this socket. Note that successful + * operations do not clear this back to GSOCK_NOERROR, so use it only + * after an error. + */ +GSocketError GSocket_GetError(GSocket *socket) +{ + assert(socket != NULL); + + return socket->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 succesfully 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(GSocket *socket, GSocketEventFlags flags, + GSocketCallback callback, char *cdata) +{ + int count; + + assert(socket != NULL); + + for (count = 0; count < GSOCK_MAX_EVENT; count++) + { + if ((flags & (1 << count)) != 0) + { + socket->m_cbacks[count] = callback; + socket->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(GSocket *socket, GSocketEventFlags flags) +{ + int count; + + assert(socket != NULL); + + for (count = 0; count < GSOCK_MAX_EVENT; count++) + { + if ((flags & (1 << count)) != 0) + { + socket->m_cbacks[count] = NULL; + socket->m_data[count] = NULL; + } + } +} + +GSocketError GSocket_GetSockOpt(GSocket *socket, int level, int optname, + void *optval, int *optlen) +{ + if (getsockopt(socket->m_fd, level, optname, optval, optlen) == 0) + { + return GSOCK_NOERROR; + } + return GSOCK_OPTERR; +} + +GSocketError GSocket_SetSockOpt(GSocket *socket, int level, int optname, + const void *optval, int optlen) +{ + if (setsockopt(socket->m_fd, level, optname, 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(GSocket *socket) +{ + fd_set readfds; + + if (!socket->m_non_blocking) + { + FD_ZERO(&readfds); + FD_SET(socket->m_fd, &readfds); + if (select(0, &readfds, NULL, NULL, &socket->m_timeout) == 0) + { + socket->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(GSocket *socket) +{ + fd_set writefds; + + if (!socket->m_non_blocking) + { + FD_ZERO(&writefds); + FD_SET(socket->m_fd, &writefds); + if (select(0, NULL, &writefds, NULL, &socket->m_timeout) == 0) + { + socket->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(GSocket *socket) +{ + fd_set writefds; + fd_set exceptfds; + + FD_ZERO(&writefds); + FD_ZERO(&exceptfds); + FD_SET(socket->m_fd, &writefds); + FD_SET(socket->m_fd, &exceptfds); + if (select(0, NULL, &writefds, &exceptfds, &socket->m_timeout) == 0) + { + socket->m_error = GSOCK_TIMEDOUT; + return GSOCK_TIMEDOUT; + } + if (!FD_ISSET(socket->m_fd, &writefds)) + { + socket->m_error = GSOCK_IOERR; + return GSOCK_IOERR; + } + + return GSOCK_NOERROR; +} + +int _GSocket_Recv_Stream(GSocket *socket, char *buffer, int size) +{ + return recv(socket->m_fd, buffer, size, 0); +} + +int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size) +{ + struct sockaddr from; + SOCKLEN_T fromlen = sizeof(from); + int ret; + GSocketError err; + + ret = recvfrom(socket->m_fd, buffer, size, 0, &from, &fromlen); + + if (ret == SOCKET_ERROR) + return SOCKET_ERROR; + + /* Translate a system address into a GSocket address */ + if (!socket->m_peer) + { + socket->m_peer = GAddress_new(); + if (!socket->m_peer) + { + socket->m_error = GSOCK_MEMERR; + return -1; + } + } + err = _GAddress_translate_from(socket->m_peer, &from, fromlen); + if (err != GSOCK_NOERROR) + { + GAddress_destroy(socket->m_peer); + socket->m_peer = NULL; + socket->m_error = err; + return -1; + } + + return ret; +} + +int _GSocket_Send_Stream(GSocket *socket, const char *buffer, int size) +{ + return send(socket->m_fd, buffer, size, 0); +} + +int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size) +{ + struct sockaddr *addr; + int len, ret; + GSocketError err; + + if (!socket->m_peer) + { + socket->m_error = GSOCK_INVADDR; + return -1; + } + + err = _GAddress_translate_to(socket->m_peer, &addr, &len); + if (err != GSOCK_NOERROR) + { + socket->m_error = err; + return -1; + } + + ret = sendto(socket->m_fd, buffer, size, 0, addr, len); + + /* Frees memory allocated by _GAddress_translate_to */ + free(addr); + + return ret; +} + + +/* + * ------------------------------------------------------------------------- + * 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(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 *path) +{ +#if defined(__BORLANDC__) + /* prevents unused variable message in Borland */ + (void)path; +#endif + assert (address != NULL); + address->m_error = GSOCK_INVADDR; + return GSOCK_INVADDR; +} + +GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf) +{ +#if defined(__BORLANDC__) + /* prevents unused variable message in Borland */ + (void)path; + (void)sbuf; +#endif + 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__) */ +