X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/06a0865f41426bf6266147cc09830d0873bd3889..a968cb805f628842f16909454a15a81333020ece:/src/msw/gsocket.c diff --git a/src/msw/gsocket.c b/src/msw/gsocket.c index 0a0f072e7c..6493dbfcec 100644 --- a/src/msw/gsocket.c +++ b/src/msw/gsocket.c @@ -1,38 +1,55 @@ /* ------------------------------------------------------------------------- - * Project: GSocket (Generic Socket) for WX + * Project: GSocket (Generic Socket) * Name: gsocket.c + * Author: Guillermo Rodriguez Garcia * Purpose: GSocket main MSW file * CVSID: $Id$ * ------------------------------------------------------------------------- */ -#ifndef __GSOCKET_STANDALONE__ -#include "wx/setup.h" -#endif +/* + * PLEASE don't put C++ comments here - this is a C source file. + */ -#if wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) +#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) +#endif /* _MSC_VER */ +#include #ifndef __GSOCKET_STANDALONE__ +# include "wx/defs.h" +# include "wx/setup.h" +#endif -#include "wx/msw/gsockmsw.h" -#include "wx/gsocket.h" - -#define INSTANCE wxGetInstance() +#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" - -/* If not using wxWindows, a global var called hInst must - * be available and it must containt the app's instance - * handle. - */ -#define INSTANCE hInst - +# include "gsockmsw.h" +# include "gsocket.h" #endif /* __GSOCKET_STANDALONE__ */ +/* Redefine some GUI-only functions to do nothing in console mode */ +#if defined(wxUSE_GUI) && !wxUSE_GUI +# define _GSocket_GUI_Init(socket) (1) +# define _GSocket_GUI_Destroy(socket) +# define _GSocket_Enable_Events(socket) +# define _GSocket_Disable_Events(socket) +#endif /* wxUSE_GUI */ #include #include @@ -40,90 +57,18 @@ #include #include #include -#include -#define SOCKLEN_T int -#define CLASSNAME "_GSocket_Internal_Window_Class" -#define WINDOWNAME "_GSocket_Internal_Window_Name" - -/* Maximum number of different GSocket objects at a given time. - * This value can be modified at will, but it CANNOT be greater - * than (0x7FFF - WM_USER + 1) - */ -#define MAXSOCKETS 1024 - -#if (MAXSOCKETS > (0x7FFF - WM_USER + 1)) -#error "MAXSOCKETS is too big!" +/* if we use configure for MSW SOCKLEN_T will be already defined */ +#ifndef SOCKLEN_T +# define SOCKLEN_T int #endif -/* Global variables */ - -extern HINSTANCE INSTANCE; -static HWND hWin; -static CRITICAL_SECTION critical; -static GSocket* socketList[MAXSOCKETS]; -static int firstAvailable; - -/* Global initializers */ +/* Constructors / Destructors for GSocket */ -bool GSocket_Init() +GSocket *GSocket_new(void) { - WSADATA wsaData; - WNDCLASS winClass; - int i; - - /* Create internal window for event notifications */ - winClass.style = 0; - winClass.lpfnWndProc = _GSocket_Internal_WinProc; - winClass.cbClsExtra = 0; - winClass.cbWndExtra = 0; - winClass.hInstance = INSTANCE; - winClass.hIcon = (HICON) NULL; - winClass.hCursor = (HCURSOR) NULL; - winClass.hbrBackground = (HBRUSH) NULL; - winClass.lpszMenuName = (LPCTSTR) NULL; - winClass.lpszClassName = CLASSNAME; - - RegisterClass(&winClass); - hWin = CreateWindow(CLASSNAME, - WINDOWNAME, - 0, 0, 0, 0, 0, - (HWND) NULL, (HMENU) NULL, INSTANCE, (LPVOID) NULL); - - if (!hWin) return FALSE; - - /* Initialize socket list */ - InitializeCriticalSection(&critical); - - for (i = 0; i < MAXSOCKETS; i++) - { - socketList[i] = NULL; - } - firstAvailable = 0; - - /* Initialize WinSocket */ - return (WSAStartup((1 << 8) | 1, &wsaData) == 0); -} - -void GSocket_Cleanup() -{ - /* Destroy internal window */ - DestroyWindow(hWin); - UnregisterClass(CLASSNAME, INSTANCE); - - /* Delete critical section */ - DeleteCriticalSection(&critical); - - /* Cleanup WinSocket */ - WSACleanup(); -} - -/* Constructors / Destructors */ - -GSocket *GSocket_new() -{ - int i; + int i, success; GSocket *socket; if ((socket = (GSocket *) malloc(sizeof(GSocket))) == NULL) @@ -134,6 +79,7 @@ GSocket *GSocket_new() { socket->m_cbacks[i] = NULL; } + socket->m_detected = 0; socket->m_local = NULL; socket->m_peer = NULL; socket->m_error = GSOCK_NOERROR; @@ -142,40 +88,32 @@ GSocket *GSocket_new() socket->m_non_blocking = FALSE; socket->m_timeout.tv_sec = 10 * 60; /* 10 minutes */ socket->m_timeout.tv_usec = 0; - socket->m_detected = 0; - - /* Allocate a new message number for this socket */ - EnterCriticalSection(&critical); + socket->m_establishing = FALSE; - i = firstAvailable; - while (socketList[i] != NULL) + /* Per-socket GUI-specific initialization */ + success = _GSocket_GUI_Init(socket); + if (!success) { - i = (i + 1) % MAXSOCKETS; - - if (i == firstAvailable) /* abort! */ - { - free(socket); - LeaveCriticalSection(&critical); - return NULL; - } + free(socket); + socket = NULL; } - socketList[i] = socket; - firstAvailable = (i + 1) % MAXSOCKETS; - socket->m_msgnumber = (i + WM_USER); - - LeaveCriticalSection(&critical); 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); - /* Remove the socket from the list */ - EnterCriticalSection(&critical); - socketList[(socket->m_msgnumber - WM_USER)] = NULL; - LeaveCriticalSection(&critical); + /* Per-socket GUI-specific cleanup */ + _GSocket_GUI_Destroy(socket); /* Check that the socket is really shutdowned */ if (socket->m_fd != INVALID_SOCKET) @@ -188,10 +126,14 @@ void GSocket_destroy(GSocket *socket) if (socket->m_peer) GAddress_destroy(socket->m_peer); - /* Destroy socket itself */ + /* 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; @@ -202,30 +144,44 @@ void GSocket_Shutdown(GSocket *socket) if (socket->m_fd != INVALID_SOCKET) { shutdown(socket->m_fd, 2); - closesocket(socket->m_fd); - socket->m_fd = INVALID_SOCKET; + GSocket_close(socket); } /* Disable GUI callbacks */ for (evt = 0; evt < GSOCK_MAX_EVENT; evt++) socket->m_cbacks[evt] = NULL; - socket->m_detected = 0; - _GSocket_Disable_Events(socket); + 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; @@ -244,6 +200,7 @@ 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; @@ -262,37 +219,39 @@ GAddress *GSocket_GetLocal(GSocket *socket) { GAddress *address; struct sockaddr addr; - SOCKLEN_T size; + 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; } - size = sizeof(addr); - if (getsockname(socket->m_fd, &addr, &size) == SOCKET_ERROR) { socket->m_error = GSOCK_IOERR; return NULL; } - address = GAddress_new(); - if (address == NULL) + /* got a valid address from getsockname, create a GAddress object */ + if ((address = GAddress_new()) == NULL) { socket->m_error = GSOCK_MEMERR; return NULL; } - if (_GAddress_translate_from(address, &addr, size) != GSOCK_NOERROR) + + if ((err = _GAddress_translate_from(address, &addr, size)) != GSOCK_NOERROR) { - socket->m_error = GSOCK_MEMERR; GAddress_destroy(address); + socket->m_error = err; return NULL; } @@ -303,6 +262,7 @@ 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); @@ -312,11 +272,14 @@ GAddress *GSocket_GetPeer(GSocket *socket) /* Server specific parts */ /* GSocket_SetServer: - * Sets up the socket as a server. It uses the "Local" field of GSocket. - * "Local" must be set by GSocket_SetLocal() before GSocket_SetServer() - * is called. Possible error codes are: GSOCK_INVSOCK if socket has not - * been initialized, GSOCK_INVADDR if the local address has not been - * defined and GSOCK_IOERR for other internal errors. + * 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) { @@ -324,12 +287,14 @@ GSocketError GSocket_SetServer(GSocket *sck) 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; @@ -353,20 +318,17 @@ GSocketError GSocket_SetServer(GSocket *sck) ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg); _GSocket_Enable_Events(sck); - /* Bind the socket to the LOCAL address */ - if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) - { - closesocket(sck->m_fd); - sck->m_fd = INVALID_SOCKET; - sck->m_error = GSOCK_IOERR; - return GSOCK_IOERR; - } - - /* Enable listening up to 5 connections */ - if (listen(sck->m_fd, 5) != 0) + /* 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)) { - closesocket(sck->m_fd); - sck->m_fd = INVALID_SOCKET; + GSocket_close(sck); sck->m_error = GSOCK_IOERR; return GSOCK_IOERR; } @@ -375,17 +337,31 @@ GSocketError GSocket_SetServer(GSocket *sck) } /* GSocket_WaitConnection: - * Waits for an incoming client connection. + * 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; @@ -409,7 +385,7 @@ GSocket *GSocket_WaitConnection(GSocket *sck) return NULL; } - connection->m_fd = accept(sck->m_fd, NULL, NULL); + connection->m_fd = accept(sck->m_fd, &from, &fromlen); if (connection->m_fd == INVALID_SOCKET) { @@ -427,94 +403,62 @@ GSocket *GSocket_WaitConnection(GSocket *sck) connection->m_stream = TRUE; connection->m_oriented = TRUE; - ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg); - _GSocket_Enable_Events(connection); - - return connection; -} - -/* Non oriented connections */ - -GSocketError GSocket_SetNonOriented(GSocket *sck) -{ - u_long arg = 1; - - assert(sck != NULL); - - if (sck->m_fd != INVALID_SOCKET) + /* Setup the peer address field */ + connection->m_peer = GAddress_new(); + if (!connection->m_peer) { - 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; - sck->m_oriented = 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; + GSocket_destroy(connection); + sck->m_error = GSOCK_MEMERR; + return NULL; } - - ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg); - _GSocket_Enable_Events(sck); - - /* Bind it to the LOCAL address */ - if (bind(sck->m_fd, sck->m_local->m_addr, sck->m_local->m_len) != 0) + err = _GAddress_translate_from(connection->m_peer, &from, fromlen); + if (err != GSOCK_NOERROR) { - closesocket(sck->m_fd); - sck->m_fd = INVALID_SOCKET; - sck->m_error = GSOCK_IOERR; - return GSOCK_IOERR; + GAddress_destroy(connection->m_peer); + GSocket_destroy(connection); + sck->m_error = err; + return NULL; } - return GSOCK_NOERROR; -} - -GSocketError GSocket_SetBroadcast(GSocket *sck) -{ - BOOL b = TRUE; - - assert(sck != NULL); - - if (GSocket_SetNonOriented(sck) != GSOCK_NOERROR) - return sck->m_error; - - setsockopt(sck->m_fd, SOL_SOCKET, SO_BROADCAST, - (const char FAR *) &b, sizeof(b)); + ioctlsocket(connection->m_fd, FIONBIO, (u_long FAR *) &arg); + _GSocket_Enable_Events(connection); - return GSOCK_NOERROR; + return connection; } /* Client specific parts */ /* GSocket_Connect: - * Establishes a client connection to a server using the "Peer" - * field of GSocket. "Peer" must be set by GSocket_SetPeer() before - * GSocket_Connect() is called. Possible error codes are GSOCK_INVSOCK, - * GSOCK_INVADDR, GSOCK_TIMEDOUT, GSOCK_WOULDBLOCK and GSOCK_IOERR. - * If a socket is nonblocking and Connect() returns GSOCK_WOULDBLOCK, - * the connection request can be completed later. Use GSocket_Select() - * to check or wait for a GSOCK_CONNECTION event. + * 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; - int type, ret, err; assert(sck != NULL); + /* Enable CONNECTION events (needed for nonblocking connections) */ sck->m_detected &= ~GSOCK_CONNECTION_FLAG; if (sck->m_fd != INVALID_SOCKET) @@ -529,18 +473,15 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream) return GSOCK_INVADDR; } - /* Test whether we want the socket to be a stream (e.g. TCP) */ + /* Streamed or dgram socket? */ sck->m_stream = (stream == GSOCK_STREAMED); sck->m_oriented = TRUE; sck->m_server = FALSE; - - if (sck->m_stream) - type = SOCK_STREAM; - else - type = SOCK_DGRAM; + sck->m_establishing = FALSE; /* Create the socket */ - sck->m_fd = socket(sck->m_peer->m_realfamily, type, 0); + sck->m_fd = socket(sck->m_peer->m_realfamily, + sck->m_stream? SOCK_STREAM : SOCK_DGRAM, 0); if (sck->m_fd == INVALID_SOCKET) { @@ -551,7 +492,7 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream) ioctlsocket(sck->m_fd, FIONBIO, (u_long FAR *) &arg); _GSocket_Enable_Events(sck); - /* Connect it to the PEER address, with a timeout (see below) */ + /* 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) @@ -565,15 +506,15 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream) */ if ((err == WSAEWOULDBLOCK) && (!sck->m_non_blocking)) { - if (_GSocket_Output_Timeout(sck) == GSOCK_TIMEDOUT) + err = _GSocket_Connect_Timeout(sck); + + if (err != GSOCK_NOERROR) { - closesocket(sck->m_fd); - sck->m_fd = INVALID_SOCKET; - /* sck->m_error is set in _GSocket_Output_Timeout */ - return GSOCK_TIMEDOUT; + GSocket_close(sck); + /* sck->m_error is set in _GSocket_Connect_Timeout */ } - else - return GSOCK_NOERROR; + + return (GSocketError) err; } /* If connect failed with EWOULDBLOCK and the GSocket object @@ -584,15 +525,79 @@ GSocketError GSocket_Connect(GSocket *sck, GSocketStream stream) */ 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. + * then the call to GSocket_Connect() has failed. */ - closesocket(sck->m_fd); - sck->m_fd = INVALID_SOCKET; + 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; + sck->m_oriented = 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; } @@ -609,6 +614,7 @@ int GSocket_Read(GSocket *socket, char *buffer, int size) assert(socket != NULL); + /* Reenable INPUT events */ socket->m_detected &= ~GSOCK_INPUT_FLAG; if (socket->m_fd == INVALID_SOCKET || socket->m_server) @@ -629,27 +635,11 @@ int GSocket_Read(GSocket *socket, char *buffer, int size) if (ret == SOCKET_ERROR) { - /* NOTE: Window sockets exhibit a very strange property; - * if the socket is in non-blocking mode (which is always - * the case here, no matter the setting of GSocket itself) - * a call to send() can fail with EWOULDBLOCK even when - * select() says that the socket is readable. - * - * This can break several things because, usually, if - * select() says that the socket is writable, it is - * assumed that send() won't fail. To avoid this, we - * return 0 instead of -1 for this special case. - */ if (WSAGetLastError() != WSAEWOULDBLOCK) - { socket->m_error = GSOCK_IOERR; - return -1; - } else - { socket->m_error = GSOCK_WOULDBLOCK; - return 0; - } + return -1; } return ret; @@ -671,7 +661,7 @@ int GSocket_Write(GSocket *socket, const char *buffer, int size) if (_GSocket_Output_Timeout(socket) == GSOCK_TIMEDOUT) return -1; - /* Read the data */ + /* Write the data */ if (socket->m_stream) ret = _GSocket_Send_Stream(socket, buffer, size); else @@ -684,6 +674,11 @@ int GSocket_Write(GSocket *socket, const char *buffer, int size) 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; } @@ -696,22 +691,132 @@ int GSocket_Write(GSocket *socket, const char *buffer, int size) * 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. + * mode (blocking | nonblocking) of the socket. */ GSocketEventFlags GSocket_Select(GSocket *socket, GSocketEventFlags flags) { +#if defined(wxUSE_GUI) && !wxUSE_GUI + + GSocketEventFlags result = 0; + fd_set readfds; + fd_set writefds; + fd_set exceptfds; + static const struct timeval tv = { 0, 0 }; + + assert(socket != NULL); + + FD_ZERO(&readfds); + FD_ZERO(&writefds); + FD_ZERO(&exceptfds); + FD_SET(socket->m_fd, &readfds); + 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, &tv) <= 0) + { + /* What to do here? */ + return (result & flags); + } + + /* Check for readability */ + if (FD_ISSET(socket->m_fd, &readfds)) + { + char c; + + if (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 + assert(socket != NULL); + return flags & socket->m_detected; - return (flags & socket->m_detected); +#endif /* !wxUSE_GUI */ } -/* Flags */ +/* Attributes */ /* GSocket_SetNonBlocking: - * Sets the socket to non-blocking mode. This is useful if - * we don't want to wait. + * Sets the socket to non-blocking mode. All IO calls will return + * immediately. */ -void GSocket_SetNonBlocking(GSocket *socket, bool non_block) +void GSocket_SetNonBlocking(GSocket *socket, int non_block) { assert(socket != NULL); @@ -719,8 +824,8 @@ void GSocket_SetNonBlocking(GSocket *socket, bool non_block) } /* GSocket_SetTimeout: - * Sets the timeout for blocking calls. Time is - * expressed in milliseconds. + * Sets the timeout for blocking calls. Time is expressed in + * milliseconds. */ void GSocket_SetTimeout(GSocket *socket, unsigned long millis) { @@ -731,7 +836,9 @@ void GSocket_SetTimeout(GSocket *socket, unsigned long millis) } /* GSocket_GetError: - * Returns the last error occured for this socket. + * 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) { @@ -742,20 +849,24 @@ GSocketError GSocket_GetError(GSocket *socket) /* Callbacks */ -/* Only one callback is possible for each event (INPUT, OUTPUT, CONNECTION - * and LOST). The callbacks are called in the following situations: - * - * INPUT: There is at least one byte in the input buffer - * OUTPUT: The system is sure that the next write call will not block - * CONNECTION: Two cases are possible: - * Client socket -> the connection is established - * Server socket -> a client requests a connection - * LOST: The connection is lost - * - * An event is generated only once and its state is reseted when the - * relative IO call is requested. - * For example: INPUT -> GSocket_Read() - * CONNECTION -> GSocket_Accept() +/* 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: @@ -771,7 +882,7 @@ void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags, { int count; - assert (socket != NULL); + assert(socket != NULL); for (count = 0; count < GSOCK_MAX_EVENT; count++) { @@ -789,7 +900,7 @@ void GSocket_SetCallback(GSocket *socket, GSocketEventFlags flags, */ void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags) { - int count = 0; + int count; assert(socket != NULL); @@ -803,106 +914,7 @@ void GSocket_UnsetCallback(GSocket *socket, GSocketEventFlags flags) } } - -/* Internals */ - -/* _GSocket_Enable_Events: - * We enable all event notifications here (we need to be notified - * of all events for internal processing) but we will only notify - * users when an appropiate callback function has been installed. - */ -void _GSocket_Enable_Events(GSocket *socket) -{ - assert (socket != NULL); - - if (socket->m_fd != INVALID_SOCKET) - { - WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, - FD_READ | FD_WRITE | FD_ACCEPT | FD_CONNECT | FD_CLOSE); - } -} - -/* _GSocket_Disable_Events: - * Disable event notifications (when shutdowning the socket) - */ -void _GSocket_Disable_Events(GSocket *socket) -{ - assert (socket != NULL); - - if (socket->m_fd != INVALID_SOCKET) - { - WSAAsyncSelect(socket->m_fd, hWin, socket->m_msgnumber, 0); - } -} - - -LRESULT CALLBACK _GSocket_Internal_WinProc(HWND hWnd, - UINT uMsg, - WPARAM wParam, - LPARAM lParam) -{ - GSocket *socket; - GSocketEvent event; - GSocketCallback cback; - char *data; - - if (uMsg >= WM_USER && uMsg <= (WM_USER + MAXSOCKETS - 1)) - { - EnterCriticalSection(&critical); - socket = socketList[(uMsg - WM_USER)]; - event = -1; - cback = NULL; - data = NULL; - - /* Check that the socket still exists (it has not been - * destroyed) and for safety, check that the m_fd field - * is what we expect it to be. - */ - if ((socket != NULL) && (socket->m_fd == wParam)) - { - switch WSAGETSELECTEVENT(lParam) - { - case FD_READ: event = GSOCK_INPUT; break; - case FD_WRITE: event = GSOCK_OUTPUT; break; - case FD_ACCEPT: event = GSOCK_CONNECTION; break; - case FD_CONNECT: - { - if (WSAGETSELECTERROR(lParam) != 0) - event = GSOCK_LOST; - else - event = GSOCK_CONNECTION; - break; - } - case FD_CLOSE: event = GSOCK_LOST; break; - } - - if (event != -1) - { - cback = socket->m_cbacks[event]; - data = socket->m_data[event]; - - if (event == GSOCK_LOST) - socket->m_detected = GSOCK_LOST_FLAG; - else - socket->m_detected |= (1 << event); - } - } - - /* OK, we can now leave the critical section because we have - * already obtained the callback address (we make no further - * accesses to socket->whatever) - */ - LeaveCriticalSection(&critical); - - if (cback != NULL) - (cback)(socket, event, data); - - return (LRESULT) 0; - } - else - return DefWindowProc(hWnd, uMsg, wParam, lParam); -} - +/* Internals (IO) */ /* _GSocket_Input_Timeout: * For blocking sockets, wait until data is available or @@ -946,6 +958,33 @@ GSocketError _GSocket_Output_Timeout(GSocket *socket) 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); @@ -956,6 +995,7 @@ 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); @@ -972,10 +1012,12 @@ int _GSocket_Recv_Dgram(GSocket *socket, char *buffer, int size) return -1; } } - if (_GAddress_translate_from(socket->m_peer, &from, fromlen) != GSOCK_NOERROR) + err = _GAddress_translate_from(socket->m_peer, &from, fromlen); + if (err != GSOCK_NOERROR) { - socket->m_error = GSOCK_MEMERR; GAddress_destroy(socket->m_peer); + socket->m_peer = NULL; + socket->m_error = err; return -1; } @@ -991,6 +1033,7 @@ int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size) { struct sockaddr *addr; int len, ret; + GSocketError err; if (!socket->m_peer) { @@ -998,9 +1041,10 @@ int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size) return -1; } - if (!_GAddress_translate_to(socket->m_peer, &addr, &len)) + err = _GAddress_translate_to(socket->m_peer, &addr, &len); + if (err != GSOCK_NOERROR) { - socket->m_error = GSOCK_MEMERR; + socket->m_error = err; return -1; } @@ -1019,23 +1063,39 @@ int _GSocket_Send_Dgram(GSocket *socket, const char *buffer, int size) * ------------------------------------------------------------------------- */ -/* CHECK_ADDRESS verifies that the current family is either GSOCK_NOFAMILY - * or GSOCK_*family*, and if it is GSOCK_NOFAMILY, it initalizes address - * to be a GSOCK_*family*. In other cases, it returns GSOCK_INVADDR. +/* 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, retval) \ +#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() + +GAddress *GAddress_new(void) { GAddress *address; @@ -1078,6 +1138,9 @@ void GAddress_destroy(GAddress *address) { assert(address != NULL); + if (address->m_addr) + free(address->m_addr); + free(address); } @@ -1164,7 +1227,7 @@ GSocketError _GAddress_translate_to(GAddress *address, GSocketError _GAddress_Init_INET(GAddress *address) { - address->m_len = sizeof(struct sockaddr_in); + address->m_len = sizeof(struct sockaddr_in); address->m_addr = (struct sockaddr *) malloc(address->m_len); if (address->m_addr == NULL) { @@ -1175,7 +1238,7 @@ GSocketError _GAddress_Init_INET(GAddress *address) address->m_family = GSOCK_INET; address->m_realfamily = PF_INET; ((struct sockaddr_in *)address->m_addr)->sin_family = AF_INET; - ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_NONE; + ((struct sockaddr_in *)address->m_addr)->sin_addr.s_addr = INADDR_ANY; return GSOCK_NOERROR; } @@ -1187,7 +1250,7 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname) assert(address != NULL); - CHECK_ADDRESS(address, INET, GSOCK_INVADDR); + CHECK_ADDRESS(address, INET); addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr); @@ -1201,6 +1264,7 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname) /* 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; } @@ -1210,6 +1274,11 @@ GSocketError GAddress_INET_SetHostName(GAddress *address, const char *hostname) 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) { @@ -1217,7 +1286,7 @@ GSocketError GAddress_INET_SetHostAddress(GAddress *address, assert(address != NULL); - CHECK_ADDRESS(address, INET, GSOCK_INVADDR); + CHECK_ADDRESS(address, INET); addr = &(((struct sockaddr_in *)address->m_addr)->sin_addr); addr->s_addr = hostaddr; @@ -1232,12 +1301,12 @@ GSocketError GAddress_INET_SetPortName(GAddress *address, const char *port, struct sockaddr_in *addr; assert(address != NULL); - CHECK_ADDRESS(address, INET, GSOCK_INVADDR); + CHECK_ADDRESS(address, INET); if (!port) { address->m_error = GSOCK_INVPORT; - return GSOCK_INVOP; + return GSOCK_INVPORT; } se = getservbyname(port, protocol); @@ -1268,7 +1337,7 @@ GSocketError GAddress_INET_SetPort(GAddress *address, unsigned short port) struct sockaddr_in *addr; assert(address != NULL); - CHECK_ADDRESS(address, INET, GSOCK_INVADDR); + CHECK_ADDRESS(address, INET); addr = (struct sockaddr_in *)address->m_addr; addr->sin_port = htons(port); @@ -1283,7 +1352,7 @@ GSocketError GAddress_INET_GetHostName(GAddress *address, char *hostname, size_t struct sockaddr_in *addr; assert(address != NULL); - CHECK_ADDRESS(address, INET, GSOCK_INVADDR); + CHECK_ADDRESS(address, INET); addr = (struct sockaddr_in *)address->m_addr; addr_buf = (char *)&(addr->sin_addr); @@ -1305,7 +1374,7 @@ unsigned long GAddress_INET_GetHostAddress(GAddress *address) struct sockaddr_in *addr; assert(address != NULL); - CHECK_ADDRESS(address, INET, 0); + CHECK_ADDRESS_RETVAL(address, INET, 0); addr = (struct sockaddr_in *)address->m_addr; @@ -1317,7 +1386,7 @@ unsigned short GAddress_INET_GetPort(GAddress *address) struct sockaddr_in *addr; assert(address != NULL); - CHECK_ADDRESS(address, INET, 0); + CHECK_ADDRESS_RETVAL(address, INET, 0); addr = (struct sockaddr_in *)address->m_addr; return ntohs(addr->sin_port); @@ -1352,23 +1421,11 @@ GSocketError GAddress_UNIX_GetPath(GAddress *address, char *path, size_t sbuf) #else /* !wxUSE_SOCKETS */ -/* - * translation unit shouldn't be empty, so include this typedef to make the +/* + * Translation unit shouldn't be empty, so include this typedef to make the * compiler (VC++ 6.0, for example) happy */ -typedef (*wxDummy)(); +typedef void (*wxDummy)(); #endif /* wxUSE_SOCKETS || defined(__GSOCKET_STANDALONE__) */ -/* Diferencias con la version Unix: - * - El descriptor es SOCKET y no int - * - Constantes -1 pasan a INVALID_SOCKET - * - Errores en muchas funciones pasan de -1 o <0 a SOCKET_ERROR - * - ioctl y close pasan a ioctlsocket y closesocket - * - inet_addr en lugar de inet_aton - * - Codigo de inicializacion y terminacion para inicializar y - * terminar WinSocket y para la ventana interna. - * - SetTimeout, SetNonBlocking y la implementacion de los - * timeouts eran bastante diferentes, pero ahora se han - * hecho en la version Unix igual que en esta. - */