diff options
Diffstat (limited to 'win/tclWinSock.c')
| -rw-r--r-- | win/tclWinSock.c | 859 |
1 files changed, 405 insertions, 454 deletions
diff --git a/win/tclWinSock.c b/win/tclWinSock.c index 0c1a270..3990111 100644 --- a/win/tclWinSock.c +++ b/win/tclWinSock.c @@ -65,7 +65,6 @@ #undef getservbyname #undef getsockopt -#undef ntohs #undef setsockopt /* @@ -91,16 +90,17 @@ static ProcessGlobalValue hostName = { * The following defines declare the messages used on socket windows. */ -#define SOCKET_MESSAGE WM_USER+1 -#define SOCKET_SELECT WM_USER+2 -#define SOCKET_TERMINATE WM_USER+3 -#define SELECT TRUE -#define UNSELECT FALSE +#define SOCKET_MESSAGE WM_USER+1 +#define SOCKET_SELECT WM_USER+2 +#define SOCKET_TERMINATE WM_USER+3 +#define SELECT TRUE +#define UNSELECT FALSE /* * This is needed to comply with the strict aliasing rules of GCC, but it also * simplifies casting between the different sockaddr types. */ + typedef union { struct sockaddr sa; struct sockaddr_in sa4; @@ -155,7 +155,7 @@ struct SocketInfo { * socket event occurs. */ -typedef struct SocketEvent { +typedef struct { Tcl_Event header; /* Information that is standard for all * events. */ SOCKET socket; /* Socket descriptor that is ready. Used to @@ -183,7 +183,7 @@ typedef struct SocketEvent { #define SOCKET_PENDING (1<<3) /* A message has been sent for this * socket */ -typedef struct ThreadSpecificData { +typedef struct { HWND hwnd; /* Handle to window for socket messages. */ HANDLE socketThread; /* Thread handling the window */ Tcl_ThreadId threadId; /* Parent thread. */ @@ -206,17 +206,13 @@ static WNDCLASS windowClass; static SocketInfo * CreateSocket(Tcl_Interp *interp, int port, const char *host, int server, const char *myaddr, int myport, int async); -#if 0 -static int CreateSocketAddress(LPSOCKADDR_IN sockaddrPtr, - const char *host, int port); -#endif static void InitSockets(void); static SocketInfo * NewSocketInfo(SOCKET socket); static void SocketExitHandler(ClientData clientData); static LRESULT CALLBACK SocketProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); static int SocketsEnabled(void); -static void TcpAccept(TcpFdList *fds); +static void TcpAccept(TcpFdList *fds, SOCKET newSocket, address addr); static int WaitForSocketEvent(SocketInfo *infoPtr, int events, int *errorCodePtr); static DWORD WINAPI SocketThread(LPVOID arg); @@ -285,8 +281,6 @@ static void InitSockets(void) { DWORD id; - WSADATA wsaData; - DWORD err; ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); if (!initialized) { @@ -315,79 +309,54 @@ InitSockets(void) TclWinConvertError(GetLastError()); goto initFailure; } - - /* - * Initialize the winsock library and check the interface version - * actually loaded. We only ask for the 1.1 interface and do require - * that it not be less than 1.1. - */ - -#define WSA_VERSION_MAJOR 1 -#define WSA_VERSION_MINOR 1 -#define WSA_VERSION_REQD MAKEWORD(WSA_VERSION_MAJOR, WSA_VERSION_MINOR) - - err = WSAStartup((WORD)WSA_VERSION_REQD, &wsaData); - if (err != 0) { - TclWinConvertWSAError(err); - goto initFailure; - } - - /* - * Note the byte positions are swapped for the comparison, so that - * 0x0002 (2.0, MAKEWORD(2,0)) doesn't look less than 0x0101 (1.1). - * We want the comparison to be 0x0200 < 0x0101. - */ - - if (MAKEWORD(HIBYTE(wsaData.wVersion), LOBYTE(wsaData.wVersion)) - < MAKEWORD(WSA_VERSION_MINOR, WSA_VERSION_MAJOR)) { - TclWinConvertWSAError(WSAVERNOTSUPPORTED); - WSACleanup(); - goto initFailure; - } - -#undef WSA_VERSION_REQD -#undef WSA_VERSION_MAJOR -#undef WSA_VERSION_MINOR } /* * Check for per-thread initialization. */ - if (tsdPtr == NULL) { - tsdPtr = TCL_TSD_INIT(&dataKey); - tsdPtr->socketList = NULL; - tsdPtr->hwnd = NULL; - tsdPtr->threadId = Tcl_GetCurrentThread(); - tsdPtr->readyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); - if (tsdPtr->readyEvent == NULL) { - goto initFailure; - } - tsdPtr->socketListLock = CreateEvent(NULL, FALSE, TRUE, NULL); - if (tsdPtr->socketListLock == NULL) { - goto initFailure; - } - tsdPtr->socketThread = CreateThread(NULL, 256, SocketThread, tsdPtr, - 0, &id); - if (tsdPtr->socketThread == NULL) { - goto initFailure; - } + if (tsdPtr != NULL) { + return; + } - SetThreadPriority(tsdPtr->socketThread, THREAD_PRIORITY_HIGHEST); + /* + * OK, this thread has never done anything with sockets before. Construct + * a worker thread to handle asynchronous events related to sockets + * assigned to _this_ thread. + */ - /* - * Wait for the thread to signal when the window has been created and - * if it is ready to go. - */ + tsdPtr = TCL_TSD_INIT(&dataKey); + tsdPtr->socketList = NULL; + tsdPtr->hwnd = NULL; + tsdPtr->threadId = Tcl_GetCurrentThread(); + tsdPtr->readyEvent = CreateEvent(NULL, FALSE, FALSE, NULL); + if (tsdPtr->readyEvent == NULL) { + goto initFailure; + } + tsdPtr->socketListLock = CreateEvent(NULL, FALSE, TRUE, NULL); + if (tsdPtr->socketListLock == NULL) { + goto initFailure; + } + tsdPtr->socketThread = CreateThread(NULL, 256, SocketThread, tsdPtr, 0, + &id); + if (tsdPtr->socketThread == NULL) { + goto initFailure; + } - WaitForSingleObject(tsdPtr->readyEvent, INFINITE); + SetThreadPriority(tsdPtr->socketThread, THREAD_PRIORITY_HIGHEST); - if (tsdPtr->hwnd == NULL) { - goto initFailure; /* Trouble creating the window */ - } + /* + * Wait for the thread to signal when the window has been created and if + * it is ready to go. + */ - Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); + WaitForSingleObject(tsdPtr->readyEvent, INFINITE); + + if (tsdPtr->hwnd == NULL) { + goto initFailure; /* Trouble creating the window. */ } + + Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); return; initFailure: @@ -417,6 +386,7 @@ static int SocketsEnabled(void) { int enabled; + Tcl_MutexLock(&socketMutex); enabled = (initialized == 1); Tcl_MutexUnlock(&socketMutex); @@ -447,6 +417,7 @@ SocketExitHandler( ClientData clientData) /* Not used. */ { Tcl_MutexLock(&socketMutex); + /* * Make sure the socket event handling window is cleaned-up for, at * most, this thread. @@ -454,7 +425,6 @@ SocketExitHandler( TclpFinalizeSockets(); UnregisterClass(classname, TclWinGetTclInstance()); - WSACleanup(); initialized = 0; Tcl_MutexUnlock(&socketMutex); } @@ -483,32 +453,38 @@ TclpFinalizeSockets(void) { ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); - if (tsdPtr != NULL) { - if (tsdPtr->socketThread != NULL) { - if (tsdPtr->hwnd != NULL) { - PostMessage(tsdPtr->hwnd, SOCKET_TERMINATE, 0, 0); + /* + * Careful! This is a finalizer! + */ - /* - * Wait for the thread to exit. This ensures that we are - * completely cleaned up before we leave this function. - */ + if (tsdPtr == NULL) { + return; + } - WaitForSingleObject(tsdPtr->readyEvent, INFINITE); - tsdPtr->hwnd = NULL; - } - CloseHandle(tsdPtr->socketThread); - tsdPtr->socketThread = NULL; - } - if (tsdPtr->readyEvent != NULL) { - CloseHandle(tsdPtr->readyEvent); - tsdPtr->readyEvent = NULL; - } - if (tsdPtr->socketListLock != NULL) { - CloseHandle(tsdPtr->socketListLock); - tsdPtr->socketListLock = NULL; + if (tsdPtr->socketThread != NULL) { + if (tsdPtr->hwnd != NULL) { + PostMessage(tsdPtr->hwnd, SOCKET_TERMINATE, 0, 0); + + /* + * Wait for the thread to exit. This ensures that we are + * completely cleaned up before we leave this function. + */ + + WaitForSingleObject(tsdPtr->readyEvent, INFINITE); + tsdPtr->hwnd = NULL; } - Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); + CloseHandle(tsdPtr->socketThread); + tsdPtr->socketThread = NULL; + } + if (tsdPtr->readyEvent != NULL) { + CloseHandle(tsdPtr->readyEvent); + tsdPtr->readyEvent = NULL; + } + if (tsdPtr->socketListLock != NULL) { + CloseHandle(tsdPtr->socketListLock); + tsdPtr->socketListLock = NULL; } + Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); } /* @@ -546,8 +522,8 @@ TclpHasSockets( return TCL_OK; } if (interp != NULL) { - Tcl_AppendResult(interp, "sockets are not available on this system", - NULL); + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "sockets are not available on this system", -1)); } return TCL_ERROR; } @@ -677,10 +653,12 @@ SocketEventProc( { SocketInfo *infoPtr; SocketEvent *eventPtr = (SocketEvent *) evPtr; - int mask = 0; - int events; + int mask = 0, events; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); TcpFdList *fds; + SOCKET newSocket; + address addr; + int len; if (!(flags & TCL_FILE_EVENTS)) { return 0; @@ -697,13 +675,13 @@ SocketEventProc( break; } } - SetEvent(tsdPtr->socketListLock); /* * Discard events that have gone stale. */ if (!infoPtr) { + SetEvent(tsdPtr->socketListLock); return 1; } @@ -715,11 +693,65 @@ SocketEventProc( if (infoPtr->readyEvents & FD_ACCEPT) { for (fds = infoPtr->sockets; fds != NULL; fds = fds->next) { - TcpAccept(fds); + + /* + * Accept the incoming connection request. + */ + len = sizeof(address); + + newSocket = accept(fds->fd, &(addr.sa), &len); + + /* On Tcl server sockets with multiple OS fds we loop over the fds trying + * an accept() on each, so we expect INVALID_SOCKET. There are also other + * network stack conditions that can result in FD_ACCEPT but a subsequent + * failure on accept() by the time we get around to it. + * Access to sockets (acceptEventCount, readyEvents) in socketList + * is still protected by the lock (prevents reintroduction of + * SF Tcl Bug 3056775. + */ + + if (newSocket == INVALID_SOCKET) { + /* int err = WSAGetLastError(); */ + continue; + } + + /* + * It is possible that more than one FD_ACCEPT has been sent, so an extra + * count must be kept. Decrement the count, and reset the readyEvent bit + * if the count is no longer > 0. + */ + infoPtr->acceptEventCount--; + + if (infoPtr->acceptEventCount <= 0) { + infoPtr->readyEvents &= ~(FD_ACCEPT); + } + + SetEvent(tsdPtr->socketListLock); + + /* Caution: TcpAccept() has the side-effect of evaluating the server + * accept script (via AcceptCallbackProc() in tclIOCmd.c), which can + * close the server socket and invalidate infoPtr and fds. + * If TcpAccept() accepts a socket we must return immediately and let + * SocketCheckProc queue additional FD_ACCEPT events. + */ + TcpAccept(fds, newSocket, addr); + return 1; } + + /* Loop terminated with no sockets accepted; clear the ready mask so + * we can detect the next connection request. Note that connection + * requests are level triggered, so if there is a request already + * pending, a new event will be generated. + */ + infoPtr->acceptEventCount = 0; + infoPtr->readyEvents &= ~(FD_ACCEPT); + + SetEvent(tsdPtr->socketListLock); return 1; } + SetEvent(tsdPtr->socketListLock); + /* * Mask off unwanted events and compute the read/write mask so we can * notify the channel. @@ -739,6 +771,7 @@ SocketEventProc( */ Tcl_Time blockTime = { 0, 0 }; + Tcl_SetMaxBlockTime(&blockTime); mask |= TCL_READABLE|TCL_WRITABLE; } else if (events & FD_READ) { @@ -860,9 +893,15 @@ TcpCloseProc( * background. */ - if (closesocket(infoPtr->sockets->fd) == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); - errorCode = Tcl_GetErrno(); + while ( infoPtr->sockets != NULL ) { + TcpFdList *thisfd = infoPtr->sockets; + infoPtr->sockets = thisfd->next; + + if (closesocket(thisfd->fd) == SOCKET_ERROR) { + TclWinConvertError((DWORD) WSAGetLastError()); + errorCode = Tcl_GetErrno(); + } + ckfree(thisfd); } } @@ -901,29 +940,31 @@ TcpClose2Proc( int flags) /* Flags that indicate which side to close. */ { SocketInfo *infoPtr = instanceData; - int errorCode = 0; - int sd; + int errorCode = 0, sd; /* * Shutdown the OS socket handle. */ - switch(flags) - { - case TCL_CLOSE_READ: - sd=SD_RECEIVE; - break; - case TCL_CLOSE_WRITE: - sd=SD_SEND; - break; - default: - if (interp) { - Tcl_AppendResult(interp, - "Socket close2proc called bidirectionally", NULL); - } - return TCL_ERROR; + + switch (flags) { + case TCL_CLOSE_READ: + sd = SD_RECEIVE; + break; + case TCL_CLOSE_WRITE: + sd = SD_SEND; + break; + default: + if (interp) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "Socket close2proc called bidirectionally", -1)); } - if (shutdown(infoPtr->sockets->fd,sd) == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + return TCL_ERROR; + } + + /* single fd operation: Tcl_OpenTcpServer() does not set TCL_READABLE or + * TCL_WRITABLE so this should never be called for a server socket. */ + if (shutdown(infoPtr->sockets->fd, sd) == SOCKET_ERROR) { + TclWinConvertError((DWORD) WSAGetLastError()); errorCode = Tcl_GetErrno(); } @@ -933,6 +974,51 @@ TcpClose2Proc( /* *---------------------------------------------------------------------- * + * AddSocketInfoFd -- + * + * This function adds a SOCKET file descriptor to the 'sockets' linked + * list of a SocketInfo structure. + * + * Results: + * None. + * + * Side effects: + * None, except for allocation of memory. + * + *---------------------------------------------------------------------- + */ + +static void +AddSocketInfoFd( + SocketInfo *infoPtr, + SOCKET socket) +{ + TcpFdList *fds = infoPtr->sockets; + + if ( fds == NULL ) { + /* Add the first FD */ + infoPtr->sockets = ckalloc(sizeof(TcpFdList)); + fds = infoPtr->sockets; + } else { + /* Find end of list and append FD */ + while ( fds->next != NULL ) { + fds = fds->next; + } + + fds->next = ckalloc(sizeof(TcpFdList)); + fds = fds->next; + } + + /* Populate new FD */ + fds->fd = socket; + fds->infoPtr = infoPtr; + fds->next = NULL; +} + + +/* + *---------------------------------------------------------------------- + * * NewSocketInfo -- * * This function allocates and initializes a new SocketInfo structure. @@ -951,14 +1037,10 @@ NewSocketInfo( SOCKET socket) { SocketInfo *infoPtr = ckalloc(sizeof(SocketInfo)); - TcpFdList *fds = ckalloc(sizeof(TcpFdList)); - fds->fd = socket; - fds->next = NULL; - fds->infoPtr = infoPtr; /* ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); */ infoPtr->channel = 0; - infoPtr->sockets = fds; + infoPtr->sockets = NULL; infoPtr->flags = 0; infoPtr->watchEvents = 0; infoPtr->readyEvents = 0; @@ -976,6 +1058,8 @@ NewSocketInfo( infoPtr->nextPtr = NULL; + AddSocketInfoFd(infoPtr, socket); + return infoPtr; } @@ -1012,8 +1096,10 @@ CreateSocket( int asyncConnect = 0; /* Will be 1 if async connect is in * progress. */ unsigned short chosenport = 0; - struct addrinfo *addrlist = NULL, *addrPtr; /* socket address */ - struct addrinfo *myaddrlist = NULL, *myaddrPtr; /* Socket address for client */ + struct addrinfo *addrlist = NULL, *addrPtr; + /* Socket address to connect to. */ + struct addrinfo *myaddrlist = NULL, *myaddrPtr; + /* Socket address for our side. */ const char *errorMsg = NULL; SOCKET sock = INVALID_SOCKET; SocketInfo *infoPtr = NULL; /* The returned value. */ @@ -1029,19 +1115,25 @@ CreateSocket( return NULL; } - if (!TclCreateSocketAddress(interp, &addrlist, host, port, server, &errorMsg)) { + /* + * Construct the addresses for each end of the socket. + */ + + if (!TclCreateSocketAddress(interp, &addrlist, host, port, server, + &errorMsg)) { goto error; } - if (!TclCreateSocketAddress(interp, &myaddrlist, myaddr, myport, 1, &errorMsg)) { + if (!TclCreateSocketAddress(interp, &myaddrlist, myaddr, myport, 1, + &errorMsg)) { goto error; } if (server) { - TcpFdList *fds = NULL, *newfds; + for (addrPtr = addrlist; addrPtr != NULL; addrPtr = addrPtr->ai_next) { sock = socket(addrPtr->ai_family, SOCK_STREAM, 0); if (sock == INVALID_SOCKET) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + TclWinConvertError((DWORD) WSAGetLastError()); continue; } @@ -1056,7 +1148,7 @@ CreateSocket( * Set kernel space buffering */ - TclSockMinimumBuffers((ClientData)sock, TCP_BUFFER_SIZE); + TclSockMinimumBuffers((void *)sock, TCP_BUFFER_SIZE); /* * Make sure we use the same port when opening two server sockets @@ -1065,9 +1157,10 @@ CreateSocket( * As sockaddr_in6 uses the same offset and size for the port * member as sockaddr_in, we can handle both through the IPv4 API. */ + if (port == 0 && chosenport != 0) { ((struct sockaddr_in *) addrPtr->ai_addr)->sin_port = - htons(chosenport); + htons(chosenport); } /* @@ -1081,31 +1174,33 @@ CreateSocket( */ if (bind(sock, addrPtr->ai_addr, addrPtr->ai_addrlen) - == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + == SOCKET_ERROR) { + TclWinConvertError((DWORD) WSAGetLastError()); closesocket(sock); continue; } if (port == 0 && chosenport == 0) { address sockname; socklen_t namelen = sizeof(sockname); + /* * Synchronize port numbers when binding to port 0 of multiple * addresses. */ + if (getsockname(sock, &sockname.sa, &namelen) >= 0) { chosenport = ntohs(sockname.sa4.sin_port); } } /* - * Set the maximum number of pending connect requests to the max value - * allowed on each platform (Win32 and Win32s may be different, and - * there may be differences between TCP/IP stacks). + * Set the maximum number of pending connect requests to the max + * value allowed on each platform (Win32 and Win32s may be + * different, and there may be differences between TCP/IP stacks). */ if (listen(sock, SOMAXCONN) == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + TclWinConvertError((DWORD) WSAGetLastError()); closesocket(sock); continue; } @@ -1116,7 +1211,6 @@ CreateSocket( */ infoPtr = NewSocketInfo(sock); - fds = infoPtr->sockets; /* * Set up the select mask for connection request events. @@ -1126,13 +1220,7 @@ CreateSocket( infoPtr->watchEvents |= FD_ACCEPT; } else { - newfds = ckalloc(sizeof(TcpFdList)); - memset(newfds, (int) 0, sizeof(TcpFdList)); - newfds->fd = sock; - newfds->infoPtr = infoPtr; - newfds->next = NULL; - fds->next = newfds; - fds = newfds; + AddSocketInfoFd( infoPtr, sock ); } } } else { @@ -1144,13 +1232,14 @@ CreateSocket( * No need to try combinations of local and remote addresses * of different families. */ + if (myaddrPtr->ai_family != addrPtr->ai_family) { continue; } sock = socket(myaddrPtr->ai_family, SOCK_STREAM, 0); if (sock == INVALID_SOCKET) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + TclWinConvertError((DWORD) WSAGetLastError()); continue; } @@ -1165,27 +1254,25 @@ CreateSocket( * Set kernel space buffering */ - TclSockMinimumBuffers((ClientData)sock, TCP_BUFFER_SIZE); + TclSockMinimumBuffers((void *) sock, TCP_BUFFER_SIZE); /* * Try to bind to a local port. */ if (bind(sock, myaddrPtr->ai_addr, myaddrPtr->ai_addrlen) - == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + == SOCKET_ERROR) { + TclWinConvertError((DWORD) WSAGetLastError()); goto looperror; } /* * Set the socket into nonblocking mode if the connect should * be done in the background. */ - if (async) { - if (ioctlsocket(sock, (long) FIONBIO, &flag) + if (async && ioctlsocket(sock, (long) FIONBIO, &flag) == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); - goto looperror; - } + TclWinConvertError((DWORD) WSAGetLastError()); + goto looperror; } /* @@ -1193,9 +1280,10 @@ CreateSocket( */ if (connect(sock, addrPtr->ai_addr, addrPtr->ai_addrlen) - == SOCKET_ERROR) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); - if (Tcl_GetErrno() != EWOULDBLOCK) { + == SOCKET_ERROR) { + DWORD error = (DWORD) WSAGetLastError(); + if (error != WSAEWOULDBLOCK) { + TclWinConvertError(error); goto looperror; } @@ -1204,10 +1292,9 @@ CreateSocket( */ asyncConnect = 1; - goto connected; - } else { - goto connected; } + goto connected; + looperror: if (sock != INVALID_SOCKET) { closesocket(sock); @@ -1225,8 +1312,8 @@ CreateSocket( infoPtr = NewSocketInfo(sock); /* - * Set up the select mask for read/write events. If the - * connect attempt has not completed, include connect events. + * Set up the select mask for read/write events. If the connect + * attempt has not completed, include connect events. */ infoPtr->selectEvents = FD_READ | FD_WRITE | FD_CLOSE; @@ -1237,10 +1324,12 @@ CreateSocket( } error: - if (addrlist == NULL) + if (addrlist != NULL) { freeaddrinfo(addrlist); - if (myaddrlist == NULL) + } + if (myaddrlist != NULL) { freeaddrinfo(myaddrlist); + } /* * Register for interest in events in the select mask. Note that this @@ -1249,95 +1338,24 @@ CreateSocket( if (infoPtr != NULL) { ioctlsocket(sock, (long) FIONBIO, &flag); - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, (LPARAM) infoPtr); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, + (LPARAM) infoPtr); return infoPtr; } if (interp != NULL) { - Tcl_AppendResult(interp, "couldn't open socket: ", - Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "couldn't open socket: %s", + (errorMsg ? errorMsg : Tcl_PosixError(interp)))); } + if (sock != INVALID_SOCKET) { closesocket(sock); } return NULL; } -#if 0 -/* - *---------------------------------------------------------------------- - * - * CreateSocketAddress -- - * - * This function initializes a sockaddr structure for a host and port. - * - * Results: - * 1 if the host was valid, 0 if the host could not be converted to an IP - * address. - * - * Side effects: - * Fills in the *sockaddrPtr structure. - * - *---------------------------------------------------------------------- - */ - -static int -CreateSocketAddress( - LPSOCKADDR_IN sockaddrPtr, /* Socket address */ - const char *host, /* Host. NULL implies INADDR_ANY */ - int port) /* Port number */ -{ - struct hostent *hostent; /* Host database entry */ - struct in_addr addr; /* For 64/32 bit madness */ - - /* - * Check that WinSock is initialized; do not call it if not, to prevent - * system crashes. This can happen at exit time if the exit handler for - * WinSock ran before other exit handlers that want to use sockets. - */ - - if (!SocketsEnabled()) { - Tcl_SetErrno(EFAULT); - return 0; - } - - ZeroMemory(sockaddrPtr, sizeof(SOCKADDR_IN)); - sockaddrPtr->sin_family = AF_INET; - sockaddrPtr->sin_port = htons((u_short) (port & 0xFFFF)); - if (host == NULL) { - addr.s_addr = INADDR_ANY; - } else { - addr.s_addr = inet_addr(host); - if (addr.s_addr == INADDR_NONE) { - hostent = gethostbyname(host); - if (hostent != NULL) { - memcpy(&addr, hostent->h_addr, (size_t) hostent->h_length); - } else { -#ifdef EHOSTUNREACH - Tcl_SetErrno(EHOSTUNREACH); -#else -#ifdef ENXIO - Tcl_SetErrno(ENXIO); -#endif -#endif - return 0; /* Error. */ - } - } - } - - /* - * NOTE: On 64 bit machines the assignment below is rumored to not do the - * right thing. Please report errors related to this if you observe - * incorrect behavior on 64 bit machines such as DEC Alphas. Should we - * modify this code to do an explicit memcpy? - */ - - sockaddrPtr->sin_addr.s_addr = addr.s_addr; - return 1; /* Success. */ -} -#endif - /* *---------------------------------------------------------------------- * @@ -1377,7 +1395,6 @@ WaitForSocketEvent( SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) UNSELECT, (LPARAM) infoPtr); - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, (LPARAM) infoPtr); @@ -1448,19 +1465,18 @@ Tcl_OpenTcpClient( return NULL; } - sprintf(channelName, "sock%Id", (size_t) infoPtr->sockets->fd); + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t) infoPtr->sockets->fd); infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, infoPtr, (TCL_READABLE | TCL_WRITABLE)); - if (Tcl_SetChannelOption(interp, infoPtr->channel, "-translation", - "auto crlf") == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, infoPtr->channel); - return (Tcl_Channel) NULL; - } - if (Tcl_SetChannelOption(NULL, infoPtr->channel, "-eofchar", "") - == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, infoPtr->channel); - return (Tcl_Channel) NULL; + if (TCL_ERROR == Tcl_SetChannelOption(NULL, infoPtr->channel, + "-translation", "auto crlf")) { + Tcl_Close(NULL, infoPtr->channel); + return NULL; + } else if (TCL_ERROR == Tcl_SetChannelOption(NULL, infoPtr->channel, + "-eofchar", "")) { + Tcl_Close(NULL, infoPtr->channel); + return NULL; } return infoPtr->channel; } @@ -1501,7 +1517,7 @@ Tcl_MakeTcpClientChannel( * Set kernel space buffering and non-blocking. */ - TclSockMinimumBuffers((ClientData) sock, TCP_BUFFER_SIZE); + TclSockMinimumBuffers(sock, TCP_BUFFER_SIZE); infoPtr = NewSocketInfo((SOCKET) sock); @@ -1510,10 +1526,9 @@ Tcl_MakeTcpClientChannel( */ infoPtr->selectEvents = FD_READ | FD_CLOSE | FD_WRITE; - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) SELECT, (LPARAM) infoPtr); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM)SELECT, (LPARAM)infoPtr); - sprintf(channelName, "sock%Id", (size_t) infoPtr->sockets->fd); + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t) infoPtr->sockets->fd); infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, infoPtr, (TCL_READABLE | TCL_WRITABLE)); Tcl_SetChannelOption(NULL, infoPtr->channel, "-translation", "auto crlf"); @@ -1566,14 +1581,14 @@ Tcl_OpenTcpServer( infoPtr->acceptProc = acceptProc; infoPtr->acceptProcData = acceptProcData; - sprintf(channelName, "sock%Id", (size_t) infoPtr->sockets->fd); + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t) infoPtr->sockets->fd); infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, infoPtr, 0); if (Tcl_SetChannelOption(interp, infoPtr->channel, "-eofchar", "") == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, infoPtr->channel); - return (Tcl_Channel) NULL; + Tcl_Close(NULL, infoPtr->channel); + return NULL; } return infoPtr->channel; @@ -1584,8 +1599,9 @@ Tcl_OpenTcpServer( * * TcpAccept -- * - * Accept a TCP socket connection. This is called by SocketEventProc and - * it in turns calls the registered accept function. + * Creates a channel for a newly accepted socket connection. This is + * called by SocketEventProc and it in turns calls the registered + * accept function. * * Results: * None. @@ -1598,59 +1614,18 @@ Tcl_OpenTcpServer( static void TcpAccept( - TcpFdList *fds) /* Socket to accept. */ + TcpFdList *fds, /* Server socket that accepted newSocket. */ + SOCKET newSocket, /* Newly accepted socket. */ + address addr) /* Address of new socket. */ { - SOCKET newSocket; SocketInfo *newInfoPtr; SocketInfo *infoPtr = fds->infoPtr; - SOCKADDR_IN addr; - int len; + int len = sizeof(addr); char channelName[16 + TCL_INTEGER_SPACE]; + char host[NI_MAXHOST], port[NI_MAXSERV]; ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); /* - * Accept the incoming connection request. - */ - - len = sizeof(SOCKADDR_IN); - - newSocket = accept(fds->fd, (SOCKADDR *)&addr, &len); - - /* - * Protect access to sockets (acceptEventCount, readyEvents) in socketList - * by the lock. Fix for SF Tcl Bug 3056775. - */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - - /* - * Clear the ready mask so we can detect the next connection request. Note - * that connection requests are level triggered, so if there is a request - * already pending, a new event will be generated. - */ - - if (newSocket == INVALID_SOCKET) { - infoPtr->acceptEventCount = 0; - infoPtr->readyEvents &= ~(FD_ACCEPT); - - SetEvent(tsdPtr->socketListLock); - return; - } - - /* - * It is possible that more than one FD_ACCEPT has been sent, so an extra - * count must be kept. Decrement the count, and reset the readyEvent bit - * if the count is no longer > 0. - */ - - infoPtr->acceptEventCount--; - - if (infoPtr->acceptEventCount <= 0) { - infoPtr->readyEvents &= ~(FD_ACCEPT); - } - - SetEvent(tsdPtr->socketListLock); - - /* * Win-NT has a misfeature that sockets are inherited in child processes * by default. Turn off the inherit bit. */ @@ -1668,20 +1643,20 @@ TcpAccept( */ newInfoPtr->selectEvents = (FD_READ | FD_WRITE | FD_CLOSE); - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) SELECT, (LPARAM) newInfoPtr); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, + (LPARAM) newInfoPtr); - sprintf(channelName, "sock%Id", (size_t) newInfoPtr->sockets->fd); + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t) newInfoPtr->sockets->fd); newInfoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, newInfoPtr, (TCL_READABLE | TCL_WRITABLE)); if (Tcl_SetChannelOption(NULL, newInfoPtr->channel, "-translation", "auto crlf") == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, newInfoPtr->channel); + Tcl_Close(NULL, newInfoPtr->channel); return; } if (Tcl_SetChannelOption(NULL, newInfoPtr->channel, "-eofchar", "") == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, newInfoPtr->channel); + Tcl_Close(NULL, newInfoPtr->channel); return; } @@ -1690,8 +1665,10 @@ TcpAccept( */ if (infoPtr->acceptProc != NULL) { + getnameinfo(&(addr.sa), len, host, sizeof(host), port, sizeof(port), + NI_NUMERICHOST|NI_NUMERICSERV); infoPtr->acceptProc(infoPtr->acceptProcData, newInfoPtr->channel, - inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); + host, atoi(port)); } } @@ -1766,6 +1743,7 @@ TcpInputProc( while (1) { SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) UNSELECT, (LPARAM) infoPtr); + /* single fd operation: this proc is only called for a connected socket. */ bytesRead = recv(infoPtr->sockets->fd, buf, toRead, 0); infoPtr->readyEvents &= ~(FD_READ); @@ -1809,7 +1787,7 @@ TcpInputProc( */ if ((infoPtr->flags & SOCKET_ASYNC) || (error != WSAEWOULDBLOCK)) { - TclWinConvertWSAError(error); + TclWinConvertError(error); *errorCodePtr = Tcl_GetErrno(); bytesRead = -1; break; @@ -1826,8 +1804,7 @@ TcpInputProc( } } - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) SELECT, (LPARAM) infoPtr); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM)SELECT, (LPARAM)infoPtr); return bytesRead; } @@ -1887,6 +1864,7 @@ TcpOutputProc( SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) UNSELECT, (LPARAM) infoPtr); + /* single fd operation: this proc is only called for a connected socket. */ bytesWritten = send(infoPtr->sockets->fd, buf, toWrite, 0); if (bytesWritten != SOCKET_ERROR) { /* @@ -1918,7 +1896,7 @@ TcpOutputProc( break; } } else { - TclWinConvertWSAError(error); + TclWinConvertError(error); *errorCodePtr = Tcl_GetErrno(); bytesWritten = -1; break; @@ -1935,8 +1913,7 @@ TcpOutputProc( } } - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) SELECT, (LPARAM) infoPtr); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM)SELECT, (LPARAM)infoPtr); return bytesWritten; } @@ -1977,12 +1954,14 @@ TcpSetOptionProc( if (!SocketsEnabled()) { if (interp) { - Tcl_AppendResult(interp, "winsock is not initialized", NULL); + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "winsock is not initialized", -1)); } return TCL_ERROR; } #ifdef TCL_FEATURE_KEEPALIVE_NAGLE + #error "TCL_FEATURE_KEEPALIVE_NAGLE not reviewed for whether to treat infoPtr->sockets as single fd or list" sock = infoPtr->sockets->fd; if (!strcasecmp(optionName, "-keepalive")) { @@ -1998,10 +1977,11 @@ TcpSetOptionProc( rtn = setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (const char *) &val, sizeof(BOOL)); if (rtn != 0) { - TclWinConvertWSAError(WSAGetLastError()); + TclWinConvertError(WSAGetLastError()); if (interp) { - Tcl_AppendResult(interp, "couldn't set socket option: ", - Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "couldn't set socket option: %s", + Tcl_PosixError(interp))); } return TCL_ERROR; } @@ -2019,10 +1999,11 @@ TcpSetOptionProc( rtn = setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (const char *) &val, sizeof(BOOL)); if (rtn != 0) { - TclWinConvertWSAError(WSAGetLastError()); + TclWinConvertError(WSAGetLastError()); if (interp) { - Tcl_AppendResult(interp, "couldn't set socket option: ", - Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "couldn't set socket option: %s", + Tcl_PosixError(interp))); } return TCL_ERROR; } @@ -2080,7 +2061,8 @@ TcpGetOptionProc( if (!SocketsEnabled()) { if (interp) { - Tcl_AppendResult(interp, "winsock is not initialized", NULL); + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "winsock is not initialized", -1)); } return TCL_ERROR; } @@ -2103,7 +2085,7 @@ TcpGetOptionProc( err = WSAGetLastError(); } if (err) { - TclWinConvertWSAError(err); + TclWinConvertError(err); Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(Tcl_GetErrno()), -1); } return TCL_OK; @@ -2117,6 +2099,7 @@ TcpGetOptionProc( (strncmp(optionName, "-peername", len) == 0))) { address peername; socklen_t size = sizeof(peername); + if (getpeername(sock, (LPSOCKADDR) &(peername.sa), &size) == 0) { if (len == 0) { Tcl_DStringAppendElement(dsPtr, "-peername"); @@ -2144,10 +2127,11 @@ TcpGetOptionProc( */ if (len) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); + TclWinConvertError((DWORD) WSAGetLastError()); if (interp) { - Tcl_AppendResult(interp, "can't get peername: ", - Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't get peername: %s", + Tcl_PosixError(interp))); } return TCL_ERROR; } @@ -2170,8 +2154,8 @@ TcpGetOptionProc( size = sizeof(sockname); if (getsockname(sock, &(sockname.sa), &size) >= 0) { int flags = reverseDNS; - found = 1; + found = 1; getnameinfo(&sockname.sa, size, host, sizeof(host), NULL, 0, NI_NUMERICHOST); Tcl_DStringAppendElement(dsPtr, host); @@ -2210,9 +2194,9 @@ TcpGetOptionProc( } } else { if (interp) { - TclWinConvertWSAError((DWORD) WSAGetLastError()); - Tcl_AppendResult(interp, "can't get sockname: ", - Tcl_PosixError(interp), NULL); + TclWinConvertError((DWORD) WSAGetLastError()); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't get sockname: %s", Tcl_PosixError(interp))); } return TCL_ERROR; } @@ -2299,7 +2283,7 @@ TcpWatchProc( /* * Update the watch events mask. Only if the socket is not a server - * socket. Fix for SF Tcl Bug #557878. + * socket. [Bug 557878] */ if (!infoPtr->acceptProc) { @@ -2318,6 +2302,7 @@ TcpWatchProc( if (infoPtr->readyEvents & infoPtr->watchEvents) { Tcl_Time blockTime = { 0, 0 }; + Tcl_SetMaxBlockTime(&blockTime); } } @@ -2379,8 +2364,8 @@ SocketThread( * Create a dummy window receiving socket events. */ - tsdPtr->hwnd = CreateWindow(classname, classname, - WS_TILED, 0, 0, 0, 0, NULL, NULL, windowClass.hInstance, arg); + tsdPtr->hwnd = CreateWindow(classname, classname, WS_TILED, 0, 0, 0, 0, + NULL, NULL, windowClass.hInstance, arg); /* * Signalize thread creator that we are done creating the window. @@ -2429,7 +2414,7 @@ SocketThread( * * Side effects: * The flags for the given socket are updated to reflect the event that - * occured. + * occurred. * *---------------------------------------------------------------------- */ @@ -2444,6 +2429,7 @@ SocketProc( int event, error; SOCKET socket; SocketInfo *infoPtr; + TcpFdList *fds = NULL; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) #ifdef _WIN64 GetWindowLongPtr(hwnd, GWLP_USERDATA); @@ -2488,58 +2474,60 @@ SocketProc( WaitForSingleObject(tsdPtr->socketListLock, INFINITE); for (infoPtr = tsdPtr->socketList; infoPtr != NULL; infoPtr = infoPtr->nextPtr) { - if (infoPtr->sockets->fd == socket) { - /* - * Update the socket state. - * - * A count of FD_ACCEPTS is stored, so if an FD_CLOSE event - * happens, then clear the FD_ACCEPT count. Otherwise, - * increment the count if the current event is an FD_ACCEPT. - */ - - if (event & FD_CLOSE) { - infoPtr->acceptEventCount = 0; - infoPtr->readyEvents &= ~(FD_WRITE|FD_ACCEPT); - } else if (event & FD_ACCEPT) { - infoPtr->acceptEventCount++; - } - - if (event & FD_CONNECT) { + for (fds = infoPtr->sockets; fds != NULL; fds = fds->next) { + if (fds->fd == socket) { /* - * The socket is now connected, clear the async connect - * flag. + * Update the socket state. + * + * A count of FD_ACCEPTS is stored, so if an FD_CLOSE event + * happens, then clear the FD_ACCEPT count. Otherwise, + * increment the count if the current event is an FD_ACCEPT. */ - infoPtr->flags &= ~(SOCKET_ASYNC_CONNECT); + if (event & FD_CLOSE) { + infoPtr->acceptEventCount = 0; + infoPtr->readyEvents &= ~(FD_WRITE|FD_ACCEPT); + } else if (event & FD_ACCEPT) { + infoPtr->acceptEventCount++; + } - /* - * Remember any error that occurred so we can report - * connection failures. - */ + if (event & FD_CONNECT) { + /* + * The socket is now connected, clear the async connect + * flag. + */ + + infoPtr->flags &= ~(SOCKET_ASYNC_CONNECT); + + /* + * Remember any error that occurred so we can report + * connection failures. + */ - if (error != ERROR_SUCCESS) { - TclWinConvertWSAError((DWORD) error); - infoPtr->lastError = Tcl_GetErrno(); + if (error != ERROR_SUCCESS) { + TclWinConvertError((DWORD) error); + infoPtr->lastError = Tcl_GetErrno(); + } } - } - if (infoPtr->flags & SOCKET_ASYNC_CONNECT) { - infoPtr->flags &= ~(SOCKET_ASYNC_CONNECT); - if (error != ERROR_SUCCESS) { - TclWinConvertWSAError((DWORD) error); - infoPtr->lastError = Tcl_GetErrno(); + if (infoPtr->flags & SOCKET_ASYNC_CONNECT) { + infoPtr->flags &= ~(SOCKET_ASYNC_CONNECT); + if (error != ERROR_SUCCESS) { + TclWinConvertError((DWORD) error); + infoPtr->lastError = Tcl_GetErrno(); + } + infoPtr->readyEvents |= FD_WRITE; } - infoPtr->readyEvents |= FD_WRITE; - } - infoPtr->readyEvents |= event; + infoPtr->readyEvents |= event; - /* - * Wake up the Main Thread. - */ + /* + * Wake up the Main Thread. + */ - SetEvent(tsdPtr->readyEvent); - Tcl_ThreadAlert(tsdPtr->threadId); - break; + SetEvent(tsdPtr->readyEvent); + Tcl_ThreadAlert(tsdPtr->threadId); + break; + } } } SetEvent(tsdPtr->socketListLock); @@ -2547,15 +2535,18 @@ SocketProc( case SOCKET_SELECT: infoPtr = (SocketInfo *) lParam; - if (wParam == SELECT) { - WSAAsyncSelect(infoPtr->sockets->fd, hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - } else { - /* - * Clear the selection mask - */ + for (fds = infoPtr->sockets; fds != NULL; fds = fds->next) { + infoPtr = (SocketInfo *) lParam; + if (wParam == SELECT) { + WSAAsyncSelect(fds->fd, hwnd, + SOCKET_MESSAGE, infoPtr->selectEvents); + } else { + /* + * Clear the selection mask + */ - WSAAsyncSelect(infoPtr->sockets->fd, hwnd, 0, 0); + WSAAsyncSelect(fds->fd, hwnd, 0, 0); + } } break; @@ -2625,22 +2616,18 @@ InitializeHostName( Tcl_DStringInit(&ds); if (TclpHasSockets(NULL) == TCL_OK) { /* - * Buffer length of 255 copied slavishly from previous version of - * this routine. Presumably there's a more "correct" macro value - * for a properly sized buffer for a gethostname() call. - * Maintainers are welcome to supply it. + * The buffer size of 256 is recommended by the MSDN page that + * documents gethostname() as being always adequate. */ Tcl_DString inDs; Tcl_DStringInit(&inDs); - Tcl_DStringSetLength(&inDs, 255); + Tcl_DStringSetLength(&inDs, 256); if (gethostname(Tcl_DStringValue(&inDs), - Tcl_DStringLength(&inDs)) == 0) { - Tcl_DStringSetLength(&ds, 0); - } else { - Tcl_ExternalToUtfDString(NULL, - Tcl_DStringValue(&inDs), -1, &ds); + Tcl_DStringLength(&inDs)) == 0) { + Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&inDs), -1, + &ds); } Tcl_DStringFree(&inDs); } @@ -2672,80 +2659,44 @@ InitializeHostName( *---------------------------------------------------------------------- */ +#undef TclWinGetSockOpt int TclWinGetSockOpt( SOCKET s, int level, int optname, - char * optval, - int FAR *optlen) + char *optval, + int *optlen) { - /* - * Check that WinSock is initialized; do not call it if not, to prevent - * system crashes. This can happen at exit time if the exit handler for - * WinSock ran before other exit handlers that want to use sockets. - */ - - if (!SocketsEnabled()) { - return SOCKET_ERROR; - } - return getsockopt(s, level, optname, optval, optlen); } +#undef TclWinSetSockOpt int TclWinSetSockOpt( SOCKET s, int level, int optname, - const char * optval, + const char *optval, int optlen) { - /* - * Check that WinSock is initialized; do not call it if not, to prevent - * system crashes. This can happen at exit time if the exit handler for - * WinSock ran before other exit handlers that want to use sockets. - */ - - if (!SocketsEnabled()) { - return SOCKET_ERROR; - } - return setsockopt(s, level, optname, optval, optlen); } -u_short -TclWinNToHS( - u_short netshort) +#undef TclpInetNtoa +char * +TclpInetNtoa( + struct in_addr addr) { - /* - * Check that WinSock is initialized; do not call it if not, to prevent - * system crashes. This can happen at exit time if the exit handler for - * WinSock ran before other exit handlers that want to use sockets. - */ - - if (!SocketsEnabled()) { - return (u_short) -1; - } - - return ntohs(netshort); + return inet_ntoa(addr); } +#undef TclWinGetServByName struct servent * TclWinGetServByName( const char *name, const char *proto) { - /* - * Check that WinSock is initialized; do not call it if not, to prevent - * system crashes. This can happen at exit time if the exit handler for - * WinSock ran before other exit handlers that want to use sockets. - */ - - if (!SocketsEnabled()) { - return NULL; - } - return getservbyname(name, proto); } |