diff options
Diffstat (limited to 'win/tclWinSock.c')
-rw-r--r-- | win/tclWinSock.c | 2279 |
1 files changed, 0 insertions, 2279 deletions
diff --git a/win/tclWinSock.c b/win/tclWinSock.c deleted file mode 100644 index bfcc3a6..0000000 --- a/win/tclWinSock.c +++ /dev/null @@ -1,2279 +0,0 @@ -/* - * tclWinSock.c -- - * - * This file contains Windows-specific socket related code. - * - * Copyright (c) 1995-1997 Sun Microsystems, Inc. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclWinSock.c,v 1.8 1999/04/16 00:48:09 stanton Exp $ - */ - -#include "tclWinInt.h" - -/* - * The following variable is used to tell whether this module has been - * initialized. - */ - -static int initialized = 0; - -static int hostnameInitialized = 0; -static char hostname[255]; /* This buffer should be big enough for - * hostname plus domain name. */ -TCL_DECLARE_MUTEX(socketMutex) - -/* - * The following structure contains pointers to all of the WinSock API entry - * points used by Tcl. It is initialized by InitSockets. Since we - * dynamically load Winsock.dll on demand, we must use this function table - * to refer to functions in the socket API. - */ - -static struct { - HINSTANCE hInstance; /* Handle to WinSock library. */ - SOCKET (PASCAL FAR *accept)(SOCKET s, struct sockaddr FAR *addr, - int FAR *addrlen); - int (PASCAL FAR *bind)(SOCKET s, const struct sockaddr FAR *addr, - int namelen); - int (PASCAL FAR *closesocket)(SOCKET s); - int (PASCAL FAR *connect)(SOCKET s, const struct sockaddr FAR *name, - int namelen); - int (PASCAL FAR *ioctlsocket)(SOCKET s, long cmd, u_long FAR *argp); - int (PASCAL FAR *getsockopt)(SOCKET s, int level, int optname, - char FAR * optval, int FAR *optlen); - u_short (PASCAL FAR *htons)(u_short hostshort); - unsigned long (PASCAL FAR *inet_addr)(const char FAR * cp); - char FAR * (PASCAL FAR *inet_ntoa)(struct in_addr in); - int (PASCAL FAR *listen)(SOCKET s, int backlog); - u_short (PASCAL FAR *ntohs)(u_short netshort); - int (PASCAL FAR *recv)(SOCKET s, char FAR * buf, int len, int flags); - int (PASCAL FAR *select)(int nfds, fd_set FAR * readfds, - fd_set FAR * writefds, fd_set FAR * exceptfds, - const struct timeval FAR * tiemout); - int (PASCAL FAR *send)(SOCKET s, const char FAR * buf, int len, int flags); - int (PASCAL FAR *setsockopt)(SOCKET s, int level, int optname, - const char FAR * optval, int optlen); - int (PASCAL FAR *shutdown)(SOCKET s, int how); - SOCKET (PASCAL FAR *socket)(int af, int type, int protocol); - struct hostent FAR * (PASCAL FAR *gethostbyname)(const char FAR * name); - struct hostent FAR * (PASCAL FAR *gethostbyaddr)(const char FAR *addr, - int addrlen, int addrtype); - int (PASCAL FAR *gethostname)(char FAR * name, int namelen); - int (PASCAL FAR *getpeername)(SOCKET sock, struct sockaddr FAR *name, - int FAR *namelen); - struct servent FAR * (PASCAL FAR *getservbyname)(const char FAR * name, - const char FAR * proto); - int (PASCAL FAR *getsockname)(SOCKET sock, struct sockaddr FAR *name, - int FAR *namelen); - int (PASCAL FAR *WSAStartup)(WORD wVersionRequired, LPWSADATA lpWSAData); - int (PASCAL FAR *WSACleanup)(void); - int (PASCAL FAR *WSAGetLastError)(void); - int (PASCAL FAR *WSAAsyncSelect)(SOCKET s, HWND hWnd, u_int wMsg, - long lEvent); -} winSock; - -/* - * The following defines declare the messages used on socket windows. - */ - -#define SOCKET_MESSAGE WM_USER+1 - -/* - * The following structure is used to store the data associated with - * each socket. - */ - -typedef struct SocketInfo { - Tcl_Channel channel; /* Channel associated with this socket. */ - SOCKET socket; /* Windows SOCKET handle. */ - int flags; /* Bit field comprised of the flags - * described below. */ - int watchEvents; /* OR'ed combination of FD_READ, FD_WRITE, - * FD_CLOSE, FD_ACCEPT and FD_CONNECT that - * indicate which events are interesting. */ - int readyEvents; /* OR'ed combination of FD_READ, FD_WRITE, - * FD_CLOSE, FD_ACCEPT and FD_CONNECT that - * indicate which events have occurred. */ - int selectEvents; /* OR'ed combination of FD_READ, FD_WRITE, - * FD_CLOSE, FD_ACCEPT and FD_CONNECT that - * indicate which events are currently - * being selected. */ - Tcl_TcpAcceptProc *acceptProc; /* Proc to call on accept. */ - ClientData acceptProcData; /* The data for the accept proc. */ - int lastError; /* Error code from last message. */ - struct SocketInfo *nextPtr; /* The next socket on the global socket - * list. */ -} SocketInfo; - -/* - * The following structure is what is added to the Tcl event queue when - * a socket event occurs. - */ - -typedef struct SocketEvent { - Tcl_Event header; /* Information that is standard for - * all events. */ - SOCKET socket; /* Socket descriptor that is ready. Used - * to find the SocketInfo structure for - * the file (can't point directly to the - * SocketInfo structure because it could - * go away while the event is queued). */ -} SocketEvent; - -/* - * This defines the minimum buffersize maintained by the kernel. - */ - -#define TCP_BUFFER_SIZE 4096 - -/* - * The following macros may be used to set the flags field of - * a SocketInfo structure. - */ - -#define SOCKET_ASYNC (1<<0) /* The socket is in blocking mode. */ -#define SOCKET_EOF (1<<1) /* A zero read happened on - * the socket. */ -#define SOCKET_ASYNC_CONNECT (1<<2) /* This socket uses async connect. */ -#define SOCKET_PENDING (1<<3) /* A message has been sent - * for this socket */ - -typedef struct ThreadSpecificData { - /* - * Every open socket has an entry on the following list. - */ - - HWND hwnd; /* Handle to window for socket messages. */ - SocketInfo *socketList; -} ThreadSpecificData; - -static Tcl_ThreadDataKey dataKey; - -/* - * Static functions defined in this file. - */ - -static SocketInfo * CreateSocket _ANSI_ARGS_((Tcl_Interp *interp, - int port, char *host, int server, char *myaddr, - int myport, int async)); -static int CreateSocketAddress _ANSI_ARGS_( - (struct sockaddr_in *sockaddrPtr, - char *host, int port)); -static void InitSockets _ANSI_ARGS_((void)); -static SocketInfo * NewSocketInfo _ANSI_ARGS_((SOCKET socket)); -static void SocketCheckProc _ANSI_ARGS_((ClientData clientData, - int flags)); -static int SocketEventProc _ANSI_ARGS_((Tcl_Event *evPtr, - int flags)); -static void SocketExitHandler _ANSI_ARGS_((ClientData clientData)); -static LRESULT CALLBACK SocketProc _ANSI_ARGS_((HWND hwnd, UINT message, - WPARAM wParam, LPARAM lParam)); -static void SocketSetupProc _ANSI_ARGS_((ClientData clientData, - int flags)); -static void SocketThreadExitHandler _ANSI_ARGS_((ClientData clientData)); -static int SocketsEnabled _ANSI_ARGS_((void)); -static void TcpAccept _ANSI_ARGS_((SocketInfo *infoPtr)); -static int TcpBlockProc _ANSI_ARGS_((ClientData instanceData, - int mode)); -static int TcpCloseProc _ANSI_ARGS_((ClientData instanceData, - Tcl_Interp *interp)); -static int TcpGetOptionProc _ANSI_ARGS_((ClientData instanceData, - Tcl_Interp *interp, char *optionName, - Tcl_DString *optionValue)); -static int TcpInputProc _ANSI_ARGS_((ClientData instanceData, - char *buf, int toRead, int *errorCode)); -static int TcpOutputProc _ANSI_ARGS_((ClientData instanceData, - char *buf, int toWrite, int *errorCode)); -static void TcpWatchProc _ANSI_ARGS_((ClientData instanceData, - int mask)); -static int TcpGetHandleProc _ANSI_ARGS_((ClientData instanceData, - int direction, ClientData *handlePtr)); -static int WaitForSocketEvent _ANSI_ARGS_((SocketInfo *infoPtr, - int events, int *errorCodePtr)); - -/* - * This structure describes the channel type structure for TCP socket - * based IO. - */ - -static Tcl_ChannelType tcpChannelType = { - "tcp", /* Type name. */ - TcpBlockProc, /* Set socket into blocking/non-blocking mode. */ - TcpCloseProc, /* Close proc. */ - TcpInputProc, /* Input proc. */ - TcpOutputProc, /* Output proc. */ - NULL, /* Seek proc. */ - NULL, /* Set option proc. */ - TcpGetOptionProc, /* Get option proc. */ - TcpWatchProc, /* Initialize notifier to watch this channel. */ - TcpGetHandleProc, /* Get an OS handle from channel. */ -}; - -/* - * Define version of Winsock required by Tcl. - */ - -#define WSA_VERSION_REQD MAKEWORD(1,1) - -/* - *---------------------------------------------------------------------- - * - * InitSockets -- - * - * Initialize the socket module. Attempts to load the wsock32.dll - * library and set up the winSock function table. If successful, - * registers the event window for the socket notifier code. - * - * Assumes Mutex is held. - * - * Results: - * None. - * - * Side effects: - * Dynamically loads wsock32.dll, and registers a new window - * class and creates a window for use in asynchronous socket - * notification. - * - *---------------------------------------------------------------------- - */ - -static void -InitSockets() -{ - WSADATA wsaData; - OSVERSIONINFO info; - static WNDCLASSA class; - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - if (! initialized) { - initialized = 1; - Tcl_CreateExitHandler(SocketExitHandler, (ClientData) NULL); - - /* - * Find out if we're running on Win32s. - */ - - info.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); - GetVersionEx(&info); - - /* - * Check to see if Sockets are supported on this system. Since - * win32s panics if we call WSAStartup on a system that doesn't - * have winsock.dll, we need to look for it on the system first. - * If we find winsock, then load the library and initialize the - * stub table. - */ - - if ((info.dwPlatformId != VER_PLATFORM_WIN32s) - || (SearchPathA(NULL, "WINSOCK", ".DLL", 0, NULL, NULL) != 0)) { - winSock.hInstance = LoadLibraryA("wsock32.dll"); - } else { - winSock.hInstance = NULL; - } - - /* - * Initialize the function table. - */ - - if (!SocketsEnabled()) { - return; - } - - winSock.accept = (SOCKET (PASCAL FAR *)(SOCKET s, - struct sockaddr FAR *addr, int FAR *addrlen)) - GetProcAddress(winSock.hInstance, "accept"); - winSock.bind = (int (PASCAL FAR *)(SOCKET s, - const struct sockaddr FAR *addr, int namelen)) - GetProcAddress(winSock.hInstance, "bind"); - winSock.closesocket = (int (PASCAL FAR *)(SOCKET s)) - GetProcAddress(winSock.hInstance, "closesocket"); - winSock.connect = (int (PASCAL FAR *)(SOCKET s, - const struct sockaddr FAR *name, int namelen)) - GetProcAddress(winSock.hInstance, "connect"); - winSock.ioctlsocket = (int (PASCAL FAR *)(SOCKET s, long cmd, - u_long FAR *argp)) - GetProcAddress(winSock.hInstance, "ioctlsocket"); - winSock.getsockopt = (int (PASCAL FAR *)(SOCKET s, - int level, int optname, char FAR * optval, int FAR *optlen)) - GetProcAddress(winSock.hInstance, "getsockopt"); - winSock.htons = (u_short (PASCAL FAR *)(u_short hostshort)) - GetProcAddress(winSock.hInstance, "htons"); - winSock.inet_addr = (unsigned long (PASCAL FAR *)(const char FAR *cp)) - GetProcAddress(winSock.hInstance, "inet_addr"); - winSock.inet_ntoa = (char FAR * (PASCAL FAR *)(struct in_addr in)) - GetProcAddress(winSock.hInstance, "inet_ntoa"); - winSock.listen = (int (PASCAL FAR *)(SOCKET s, int backlog)) - GetProcAddress(winSock.hInstance, "listen"); - winSock.ntohs = (u_short (PASCAL FAR *)(u_short netshort)) - GetProcAddress(winSock.hInstance, "ntohs"); - winSock.recv = (int (PASCAL FAR *)(SOCKET s, char FAR * buf, - int len, int flags)) GetProcAddress(winSock.hInstance, "recv"); - winSock.select = (int (PASCAL FAR *)(int nfds, fd_set FAR * readfds, - fd_set FAR * writefds, fd_set FAR * exceptfds, - const struct timeval FAR * tiemout)) - GetProcAddress(winSock.hInstance, "select"); - winSock.send = (int (PASCAL FAR *)(SOCKET s, const char FAR * buf, - int len, int flags)) GetProcAddress(winSock.hInstance, "send"); - winSock.setsockopt = (int (PASCAL FAR *)(SOCKET s, int level, - int optname, const char FAR * optval, int optlen)) - GetProcAddress(winSock.hInstance, "setsockopt"); - winSock.shutdown = (int (PASCAL FAR *)(SOCKET s, int how)) - GetProcAddress(winSock.hInstance, "shutdown"); - winSock.socket = (SOCKET (PASCAL FAR *)(int af, int type, - int protocol)) GetProcAddress(winSock.hInstance, "socket"); - winSock.gethostbyaddr = (struct hostent FAR * (PASCAL FAR *) - (const char FAR *addr, int addrlen, int addrtype)) - GetProcAddress(winSock.hInstance, "gethostbyaddr"); - winSock.gethostbyname = (struct hostent FAR * (PASCAL FAR *) - (const char FAR *name)) - GetProcAddress(winSock.hInstance, "gethostbyname"); - winSock.gethostname = (int (PASCAL FAR *)(char FAR * name, - int namelen)) GetProcAddress(winSock.hInstance, "gethostname"); - winSock.getpeername = (int (PASCAL FAR *)(SOCKET sock, - struct sockaddr FAR *name, int FAR *namelen)) - GetProcAddress(winSock.hInstance, "getpeername"); - winSock.getservbyname = (struct servent FAR * (PASCAL FAR *) - (const char FAR * name, const char FAR * proto)) - GetProcAddress(winSock.hInstance, "getservbyname"); - winSock.getsockname = (int (PASCAL FAR *)(SOCKET sock, - struct sockaddr FAR *name, int FAR *namelen)) - GetProcAddress(winSock.hInstance, "getsockname"); - winSock.WSAStartup = (int (PASCAL FAR *)(WORD wVersionRequired, - LPWSADATA lpWSAData)) GetProcAddress(winSock.hInstance, "WSAStartup"); - winSock.WSACleanup = (int (PASCAL FAR *)(void)) - GetProcAddress(winSock.hInstance, "WSACleanup"); - winSock.WSAGetLastError = (int (PASCAL FAR *)(void)) - GetProcAddress(winSock.hInstance, "WSAGetLastError"); - winSock.WSAAsyncSelect = (int (PASCAL FAR *)(SOCKET s, HWND hWnd, - u_int wMsg, long lEvent)) - GetProcAddress(winSock.hInstance, "WSAAsyncSelect"); - - /* - * Now check that all fields are properly initialized. If not, return - * zero to indicate that we failed to initialize properly. - */ - - if ((winSock.hInstance == NULL) || - (winSock.accept == NULL) || - (winSock.bind == NULL) || - (winSock.closesocket == NULL) || - (winSock.connect == NULL) || - (winSock.ioctlsocket == NULL) || - (winSock.getsockopt == NULL) || - (winSock.htons == NULL) || - (winSock.inet_addr == NULL) || - (winSock.inet_ntoa == NULL) || - (winSock.listen == NULL) || - (winSock.ntohs == NULL) || - (winSock.recv == NULL) || - (winSock.select == NULL) || - (winSock.send == NULL) || - (winSock.setsockopt == NULL) || - (winSock.socket == NULL) || - (winSock.gethostbyname == NULL) || - (winSock.gethostbyaddr == NULL) || - (winSock.gethostname == NULL) || - (winSock.getpeername == NULL) || - (winSock.getservbyname == NULL) || - (winSock.getsockname == NULL) || - (winSock.WSAStartup == NULL) || - (winSock.WSACleanup == NULL) || - (winSock.WSAGetLastError == NULL) || - (winSock.WSAAsyncSelect == NULL)) { - goto unloadLibrary; - } - - /* - * Create the async notification window with a new class. We - * must create a new class to avoid a Windows 95 bug that causes - * us to get the wrong message number for socket events if the - * message window is a subclass of a static control. - */ - - class.style = 0; - class.cbClsExtra = 0; - class.cbWndExtra = 0; - class.hInstance = TclWinGetTclInstance(); - class.hbrBackground = NULL; - class.lpszMenuName = NULL; - class.lpszClassName = "TclSocket"; - class.lpfnWndProc = SocketProc; - class.hIcon = NULL; - class.hCursor = NULL; - - if (!RegisterClassA(&class)) { - TclWinConvertError(GetLastError()); - (*winSock.WSACleanup)(); - goto unloadLibrary; - } - - /* - * Initialize the winsock library and check the version number. - */ - - if ((*winSock.WSAStartup)(WSA_VERSION_REQD, &wsaData) != 0) { - goto unloadLibrary; - } - if (wsaData.wVersion != WSA_VERSION_REQD) { - (*winSock.WSACleanup)(); - goto unloadLibrary; - } - } - - /* - * Check for per-thread initialization. - */ - - if (tsdPtr == NULL) { - tsdPtr = TCL_TSD_INIT(&dataKey); - tsdPtr->socketList = NULL; - - tsdPtr->hwnd = CreateWindowA("TclSocket", "TclSocket", - WS_TILED, 0, 0, 0, 0, NULL, NULL, class.hInstance, NULL); - - if (tsdPtr->hwnd == NULL) { - goto unloadLibrary; - } - - Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); - Tcl_CreateThreadExitHandler(SocketThreadExitHandler, NULL); - } - return; - -unloadLibrary: - FreeLibrary(winSock.hInstance); - winSock.hInstance = NULL; - return; -} - -/* - *---------------------------------------------------------------------- - * - * SocketsEnabled -- - * - * Check that the WinSock DLL is loaded and ready. - * - * Results: - * 1 if it is. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - - /* ARGSUSED */ -static int -SocketsEnabled() -{ - int enabled; - Tcl_MutexLock(&socketMutex); - enabled = (winSock.hInstance != NULL); - Tcl_MutexUnlock(&socketMutex); - return enabled; -} - - -/* - *---------------------------------------------------------------------- - * - * SocketExitHandler -- - * - * Callback invoked during exit clean up to delete the socket - * communication window and to release the WinSock DLL. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - - /* ARGSUSED */ -static void -SocketExitHandler(clientData) - ClientData clientData; /* Not used. */ -{ - Tcl_MutexLock(&socketMutex); - if (winSock.hInstance) { - UnregisterClassA("TclSocket", TclWinGetTclInstance()); - (*winSock.WSACleanup)(); - FreeLibrary(winSock.hInstance); - winSock.hInstance = NULL; - } - initialized = 0; - hostnameInitialized = 0; - Tcl_MutexUnlock(&socketMutex); -} - -/* - *---------------------------------------------------------------------- - * - * SocketThreadExitHandler -- - * - * Callback invoked during thread clean up to delete the socket - * event source. - * - * Results: - * None. - * - * Side effects: - * Delete the event source. - * - *---------------------------------------------------------------------- - */ - - /* ARGSUSED */ -static void -SocketThreadExitHandler(clientData) - ClientData clientData; /* Not used. */ -{ - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - DestroyWindow(tsdPtr->hwnd); - - Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); -} - -/* - *---------------------------------------------------------------------- - * - * TclpHasSockets -- - * - * This function determines whether sockets are available on the - * current system and returns an error in interp if they are not. - * Note that interp may be NULL. - * - * Results: - * Returns TCL_OK if the system supports sockets, or TCL_ERROR with - * an error in interp. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -int -TclpHasSockets(interp) - Tcl_Interp *interp; -{ - Tcl_MutexLock(&socketMutex); - InitSockets(); - Tcl_MutexUnlock(&socketMutex); - - if (SocketsEnabled()) { - return TCL_OK; - } - if (interp != NULL) { - Tcl_AppendResult(interp, "sockets are not available on this system", - NULL); - } - return TCL_ERROR; -} - -/* - *---------------------------------------------------------------------- - * - * SocketSetupProc -- - * - * This procedure is invoked before Tcl_DoOneEvent blocks waiting - * for an event. - * - * Results: - * None. - * - * Side effects: - * Adjusts the block time if needed. - * - *---------------------------------------------------------------------- - */ - -void -SocketSetupProc(data, flags) - ClientData data; /* Not used. */ - int flags; /* Event flags as passed to Tcl_DoOneEvent. */ -{ - SocketInfo *infoPtr; - Tcl_Time blockTime = { 0, 0 }; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return; - } - - /* - * Check to see if there is a ready socket. If so, poll. - */ - - for (infoPtr = tsdPtr->socketList; infoPtr != NULL; - infoPtr = infoPtr->nextPtr) { - if (infoPtr->readyEvents & infoPtr->watchEvents) { - Tcl_SetMaxBlockTime(&blockTime); - break; - } - } -} - -/* - *---------------------------------------------------------------------- - * - * SocketCheckProc -- - * - * This procedure is called by Tcl_DoOneEvent to check the socket - * event source for events. - * - * Results: - * None. - * - * Side effects: - * May queue an event. - * - *---------------------------------------------------------------------- - */ - -static void -SocketCheckProc(data, flags) - ClientData data; /* Not used. */ - int flags; /* Event flags as passed to Tcl_DoOneEvent. */ -{ - SocketInfo *infoPtr; - SocketEvent *evPtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return; - } - - /* - * Queue events for any ready sockets that don't already have events - * queued (caused by persistent states that won't generate WinSock - * events). - */ - - for (infoPtr = tsdPtr->socketList; infoPtr != NULL; - infoPtr = infoPtr->nextPtr) { - if ((infoPtr->readyEvents & infoPtr->watchEvents) - && !(infoPtr->flags & SOCKET_PENDING)) { - infoPtr->flags |= SOCKET_PENDING; - evPtr = (SocketEvent *) ckalloc(sizeof(SocketEvent)); - evPtr->header.proc = SocketEventProc; - evPtr->socket = infoPtr->socket; - Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL); - } - } -} - -/* - *---------------------------------------------------------------------- - * - * SocketEventProc -- - * - * This procedure is called by Tcl_ServiceEvent when a socket event - * reaches the front of the event queue. This procedure is - * responsible for notifying the generic channel code. - * - * Results: - * Returns 1 if the event was handled, meaning it should be removed - * from the queue. Returns 0 if the event was not handled, meaning - * it should stay on the queue. The only time the event isn't - * handled is if the TCL_FILE_EVENTS flag bit isn't set. - * - * Side effects: - * Whatever the channel callback procedures do. - * - *---------------------------------------------------------------------- - */ - -static int -SocketEventProc(evPtr, flags) - Tcl_Event *evPtr; /* Event to service. */ - int flags; /* Flags that indicate what events to - * handle, such as TCL_FILE_EVENTS. */ -{ - SocketInfo *infoPtr; - SocketEvent *eventPtr = (SocketEvent *) evPtr; - int mask = 0; - int events; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return 0; - } - - /* - * Find the specified socket on the socket list. - */ - - for (infoPtr = tsdPtr->socketList; infoPtr != NULL; - infoPtr = infoPtr->nextPtr) { - if (infoPtr->socket == eventPtr->socket) { - break; - } - } - - /* - * Discard events that have gone stale. - */ - - if (!infoPtr) { - return 1; - } - - infoPtr->flags &= ~SOCKET_PENDING; - - /* - * Handle connection requests directly. - */ - - if (infoPtr->readyEvents & FD_ACCEPT) { - TcpAccept(infoPtr); - return 1; - } - - - /* - * Mask off unwanted events and compute the read/write mask so - * we can notify the channel. - */ - - events = infoPtr->readyEvents & infoPtr->watchEvents; - - if (events & FD_CLOSE) { - /* - * If the socket was closed and the channel is still interested - * in read events, then we need to ensure that we keep polling - * for this event until someone does something with the channel. - * Note that we do this before calling Tcl_NotifyChannel so we don't - * have to watch out for the channel being deleted out from under - * us. This may cause a redundant trip through the event loop, but - * it's simpler than trying to do unwind protection. - */ - - Tcl_Time blockTime = { 0, 0 }; - Tcl_SetMaxBlockTime(&blockTime); - mask |= TCL_READABLE; - } else if (events & FD_READ) { - fd_set readFds; - struct timeval timeout; - - /* - * We must check to see if data is really available, since someone - * could have consumed the data in the meantime. Turn off async - * notification so select will work correctly. If the socket is - * still readable, notify the channel driver, otherwise reset the - * async select handler and keep waiting. - */ - - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, 0, 0); - - FD_ZERO(&readFds); - FD_SET(infoPtr->socket, &readFds); - timeout.tv_usec = 0; - timeout.tv_sec = 0; - - if ((*winSock.select)(0, &readFds, NULL, NULL, &timeout) != 0) { - mask |= TCL_READABLE; - } else { - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - infoPtr->readyEvents &= ~(FD_READ); - } - } - if (events & (FD_WRITE | FD_CONNECT)) { - mask |= TCL_WRITABLE; - } - - if (mask) { - Tcl_NotifyChannel(infoPtr->channel, mask); - } - return 1; -} - -/* - *---------------------------------------------------------------------- - * - * TcpBlockProc -- - * - * Sets a socket into blocking or non-blocking mode. - * - * Results: - * 0 if successful, errno if there was an error. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -TcpBlockProc(instanceData, mode) - ClientData instanceData; /* The socket to block/un-block. */ - int mode; /* TCL_MODE_BLOCKING or - * TCL_MODE_NONBLOCKING. */ -{ - SocketInfo *infoPtr = (SocketInfo *) instanceData; - - if (mode == TCL_MODE_NONBLOCKING) { - infoPtr->flags |= SOCKET_ASYNC; - } else { - infoPtr->flags &= ~(SOCKET_ASYNC); - } - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * TcpCloseProc -- - * - * This procedure is called by the generic IO level to perform - * channel type specific cleanup on a socket based channel - * when the channel is closed. - * - * Results: - * 0 if successful, the value of errno if failed. - * - * Side effects: - * Closes the socket. - * - *---------------------------------------------------------------------- - */ - - /* ARGSUSED */ -static int -TcpCloseProc(instanceData, interp) - ClientData instanceData; /* The socket to close. */ - Tcl_Interp *interp; /* Unused. */ -{ - SocketInfo *infoPtr = (SocketInfo *) instanceData; - SocketInfo **nextPtrPtr; - int errorCode = 0; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - /* - * 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()) { - - /* - * Clean up the OS socket handle. The default Windows setting - * for a socket is SO_DONTLINGER, which does a graceful shutdown - * in the background. - */ - - if ((*winSock.closesocket)(infoPtr->socket) == SOCKET_ERROR) { - TclWinConvertWSAError((*winSock.WSAGetLastError)()); - errorCode = Tcl_GetErrno(); - } - } - - /* - * Remove the socket from socketList. - */ - - for (nextPtrPtr = &(tsdPtr->socketList); (*nextPtrPtr) != NULL; - nextPtrPtr = &((*nextPtrPtr)->nextPtr)) { - if ((*nextPtrPtr) == infoPtr) { - (*nextPtrPtr) = infoPtr->nextPtr; - break; - } - } - - ckfree((char *) infoPtr); - return errorCode; -} - -/* - *---------------------------------------------------------------------- - * - * NewSocketInfo -- - * - * This function allocates and initializes a new SocketInfo - * structure. - * - * Results: - * Returns a newly allocated SocketInfo. - * - * Side effects: - * Adds the socket to the global socket list. - * - *---------------------------------------------------------------------- - */ - -static SocketInfo * -NewSocketInfo(socket) - SOCKET socket; -{ - SocketInfo *infoPtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - infoPtr = (SocketInfo *) ckalloc((unsigned) sizeof(SocketInfo)); - infoPtr->socket = socket; - infoPtr->flags = 0; - infoPtr->watchEvents = 0; - infoPtr->readyEvents = 0; - infoPtr->selectEvents = 0; - infoPtr->acceptProc = NULL; - infoPtr->lastError = 0; - - infoPtr->nextPtr = tsdPtr->socketList; - tsdPtr->socketList = infoPtr; - - return infoPtr; -} - -/* - *---------------------------------------------------------------------- - * - * CreateSocket -- - * - * This function opens a new socket and initializes the - * SocketInfo structure. - * - * Results: - * Returns a new SocketInfo, or NULL with an error in interp. - * - * Side effects: - * Adds a new socket to the socketList. - * - *---------------------------------------------------------------------- - */ - -static SocketInfo * -CreateSocket(interp, port, host, server, myaddr, myport, async) - Tcl_Interp *interp; /* For error reporting; can be NULL. */ - int port; /* Port number to open. */ - char *host; /* Name of host on which to open port. */ - int server; /* 1 if socket should be a server socket, - * else 0 for a client socket. */ - char *myaddr; /* Optional client-side address */ - int myport; /* Optional client-side port */ - int async; /* If nonzero, connect client socket - * asynchronously. */ -{ - u_long flag = 1; /* Indicates nonblocking mode. */ - int asyncConnect = 0; /* Will be 1 if async connect is - * in progress. */ - struct sockaddr_in sockaddr; /* Socket address */ - struct sockaddr_in mysockaddr; /* Socket address for client */ - SOCKET sock; - SocketInfo *infoPtr; /* The returned value. */ - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - /* - * 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; - } - - if (! CreateSocketAddress(&sockaddr, host, port)) { - goto error; - } - if ((myaddr != NULL || myport != 0) && - ! CreateSocketAddress(&mysockaddr, myaddr, myport)) { - goto error; - } - - sock = (*winSock.socket)(AF_INET, SOCK_STREAM, 0); - if (sock == INVALID_SOCKET) { - goto error; - } - - /* - * Win-NT has a misfeature that sockets are inherited in child - * processes by default. Turn off the inherit bit. - */ - - SetHandleInformation( (HANDLE) sock, HANDLE_FLAG_INHERIT, 0 ); - - /* - * Set kernel space buffering - */ - - TclSockMinimumBuffers(sock, TCP_BUFFER_SIZE); - - if (server) { - /* - * Bind to the specified port. Note that we must not call setsockopt - * with SO_REUSEADDR because Microsoft allows addresses to be reused - * even if they are still in use. - * - * Bind should not be affected by the socket having already been - * set into nonblocking mode. If there is trouble, this is one place - * to look for bugs. - */ - - if ((*winSock.bind)(sock, (struct sockaddr *) &sockaddr, - sizeof(sockaddr)) == SOCKET_ERROR) { - goto error; - } - - /* - * 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 ((*winSock.listen)(sock, SOMAXCONN) == SOCKET_ERROR) { - goto error; - } - - /* - * Add this socket to the global list of sockets. - */ - - infoPtr = NewSocketInfo(sock); - - /* - * Set up the select mask for connection request events. - */ - - infoPtr->selectEvents = FD_ACCEPT; - infoPtr->watchEvents |= FD_ACCEPT; - - } else { - - /* - * Try to bind to a local port, if specified. - */ - - if (myaddr != NULL || myport != 0) { - if ((*winSock.bind)(sock, (struct sockaddr *) &mysockaddr, - sizeof(struct sockaddr)) == SOCKET_ERROR) { - goto error; - } - } - - /* - * Set the socket into nonblocking mode if the connect should be - * done in the background. - */ - - if (async) { - if ((*winSock.ioctlsocket)(sock, FIONBIO, &flag) == SOCKET_ERROR) { - goto error; - } - } - - /* - * Attempt to connect to the remote socket. - */ - - if ((*winSock.connect)(sock, (struct sockaddr *) &sockaddr, - sizeof(sockaddr)) == SOCKET_ERROR) { - TclWinConvertWSAError((*winSock.WSAGetLastError)()); - if (Tcl_GetErrno() != EWOULDBLOCK) { - goto error; - } - - /* - * The connection is progressing in the background. - */ - - asyncConnect = 1; - } - - /* - * Add this socket to the global list of sockets. - */ - - infoPtr = NewSocketInfo(sock); - - /* - * 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; - if (asyncConnect) { - infoPtr->flags |= SOCKET_ASYNC_CONNECT; - infoPtr->selectEvents |= FD_CONNECT; - } - } - - /* - * Register for interest in events in the select mask. Note that this - * automatically places the socket into non-blocking mode. - */ - - (*winSock.ioctlsocket)(sock, FIONBIO, &flag); - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - - return infoPtr; - -error: - TclWinConvertWSAError((*winSock.WSAGetLastError)()); - if (interp != NULL) { - Tcl_AppendResult(interp, "couldn't open socket: ", - Tcl_PosixError(interp), (char *) NULL); - } - if (sock != INVALID_SOCKET) { - (*winSock.closesocket)(sock); - } - return NULL; -} - -/* - *---------------------------------------------------------------------- - * - * 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(sockaddrPtr, host, port) - struct sockaddr_in *sockaddrPtr; /* Socket address */ - 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; - } - - (void) memset((char *) sockaddrPtr, '\0', sizeof(struct sockaddr_in)); - sockaddrPtr->sin_family = AF_INET; - sockaddrPtr->sin_port = (*winSock.htons)((short) (port & 0xFFFF)); - if (host == NULL) { - addr.s_addr = INADDR_ANY; - } else { - addr.s_addr = (*winSock.inet_addr)(host); - if (addr.s_addr == INADDR_NONE) { - hostent = (*winSock.gethostbyname)(host); - if (hostent != NULL) { - memcpy((char *) &addr, - (char *) hostent->h_addr_list[0], - (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. */ -} - -/* - *---------------------------------------------------------------------- - * - * WaitForSocketEvent -- - * - * Waits until one of the specified events occurs on a socket. - * - * Results: - * Returns 1 on success or 0 on failure, with an error code in - * errorCodePtr. - * - * Side effects: - * Processes socket events off the system queue. - * - *---------------------------------------------------------------------- - */ - -static int -WaitForSocketEvent(infoPtr, events, errorCodePtr) - SocketInfo *infoPtr; /* Information about this socket. */ - int events; /* Events to look for. */ - int *errorCodePtr; /* Where to store errors? */ -{ - MSG msg; - int result = 1; - int oldMode; - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - /* - * Be sure to disable event servicing so we are truly modal. - */ - - oldMode = Tcl_SetServiceMode(TCL_SERVICE_NONE); - - /* - * Reset WSAAsyncSelect so we have a fresh set of events pending. - */ - - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, 0, 0); - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - - while (1) { - /* - * Process all outstanding messages on the socket window. - */ - - while (PeekMessage(&msg, tsdPtr->hwnd, 0, 0, PM_REMOVE)) { - DispatchMessage(&msg); - } - - if (infoPtr->lastError) { - *errorCodePtr = infoPtr->lastError; - result = 0; - break; - } else if (infoPtr->readyEvents & events) { - break; - } else if (infoPtr->flags & SOCKET_ASYNC) { - *errorCodePtr = EWOULDBLOCK; - result = 0; - break; - } - - /* - * Wait until something happens. - */ - - WaitMessage(); - } - - - (void) Tcl_SetServiceMode(oldMode); - return result; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_OpenTcpClient -- - * - * Opens a TCP client socket and creates a channel around it. - * - * Results: - * The channel or NULL if failed. An error message is returned - * in the interpreter on failure. - * - * Side effects: - * Opens a client socket and creates a new channel. - * - *---------------------------------------------------------------------- - */ - -Tcl_Channel -Tcl_OpenTcpClient(interp, port, host, myaddr, myport, async) - Tcl_Interp *interp; /* For error reporting; can be NULL. */ - int port; /* Port number to open. */ - char *host; /* Host on which to open port. */ - char *myaddr; /* Client-side address */ - int myport; /* Client-side port */ - int async; /* If nonzero, should connect - * client socket asynchronously. */ -{ - SocketInfo *infoPtr; - char channelName[16 + TCL_INTEGER_SPACE]; - - if (TclpHasSockets(interp) != TCL_OK) { - return NULL; - } - - /* - * Create a new client socket and wrap it in a channel. - */ - - infoPtr = CreateSocket(interp, port, host, 0, myaddr, myport, async); - if (infoPtr == NULL) { - return NULL; - } - - wsprintfA(channelName, "sock%d", infoPtr->socket); - - infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) 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; - } - return infoPtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_MakeTcpClientChannel -- - * - * Creates a Tcl_Channel from an existing client TCP socket. - * - * Results: - * The Tcl_Channel wrapped around the preexisting TCP socket. - * - * Side effects: - * None. - * - * NOTE: Code contributed by Mark Diekhans (markd@grizzly.com) - * - *---------------------------------------------------------------------- - */ - -Tcl_Channel -Tcl_MakeTcpClientChannel(sock) - ClientData sock; /* The socket to wrap up into a channel. */ -{ - SocketInfo *infoPtr; - char channelName[16 + TCL_INTEGER_SPACE]; - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - if (TclpHasSockets(NULL) != TCL_OK) { - return NULL; - } - - /* - * Set kernel space buffering and non-blocking. - */ - - TclSockMinimumBuffers((SOCKET) sock, TCP_BUFFER_SIZE); - - infoPtr = NewSocketInfo((SOCKET) sock); - - /* - * Start watching for read/write events on the socket. - */ - - infoPtr->selectEvents = FD_READ | FD_CLOSE | FD_WRITE; - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - - wsprintfA(channelName, "sock%d", infoPtr->socket); - infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) infoPtr, (TCL_READABLE | TCL_WRITABLE)); - Tcl_SetChannelOption(NULL, infoPtr->channel, "-translation", "auto crlf"); - return infoPtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_OpenTcpServer -- - * - * Opens a TCP server socket and creates a channel around it. - * - * Results: - * The channel or NULL if failed. An error message is returned - * in the interpreter on failure. - * - * Side effects: - * Opens a server socket and creates a new channel. - * - *---------------------------------------------------------------------- - */ - -Tcl_Channel -Tcl_OpenTcpServer(interp, port, host, acceptProc, acceptProcData) - Tcl_Interp *interp; /* For error reporting - may be - * NULL. */ - int port; /* Port number to open. */ - char *host; /* Name of local host. */ - Tcl_TcpAcceptProc *acceptProc; /* Callback for accepting connections - * from new clients. */ - ClientData acceptProcData; /* Data for the callback. */ -{ - SocketInfo *infoPtr; - char channelName[16 + TCL_INTEGER_SPACE]; - - if (TclpHasSockets(interp) != TCL_OK) { - return NULL; - } - - /* - * Create a new client socket and wrap it in a channel. - */ - - infoPtr = CreateSocket(interp, port, host, 1, NULL, 0, 0); - if (infoPtr == NULL) { - return NULL; - } - - infoPtr->acceptProc = acceptProc; - infoPtr->acceptProcData = acceptProcData; - - wsprintfA(channelName, "sock%d", infoPtr->socket); - - infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) infoPtr, 0); - if (Tcl_SetChannelOption(interp, infoPtr->channel, "-eofchar", "") - == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, infoPtr->channel); - return (Tcl_Channel) NULL; - } - - return infoPtr->channel; -} - -/* - *---------------------------------------------------------------------- - * - * TcpAccept -- - * Accept a TCP socket connection. This is called by - * SocketEventProc and it in turns calls the registered accept - * procedure. - * - * Results: - * None. - * - * Side effects: - * Invokes the accept proc which may invoke arbitrary Tcl code. - * - *---------------------------------------------------------------------- - */ - -static void -TcpAccept(infoPtr) - SocketInfo *infoPtr; /* Socket to accept. */ -{ - SOCKET newSocket; - SocketInfo *newInfoPtr; - struct sockaddr_in addr; - int len; - char channelName[16 + TCL_INTEGER_SPACE]; - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - /* - * Accept the incoming connection request. - */ - - len = sizeof(struct sockaddr_in); - newSocket = (*winSock.accept)(infoPtr->socket, (struct sockaddr *)&addr, - &len); - - /* - * 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->readyEvents &= ~(FD_ACCEPT); - - if (newSocket == INVALID_SOCKET) { - return; - } - - /* - * Win-NT has a misfeature that sockets are inherited in child - * processes by default. Turn off the inherit bit. - */ - - SetHandleInformation( (HANDLE) newSocket, HANDLE_FLAG_INHERIT, 0 ); - - /* - * Add this socket to the global list of sockets. - */ - - newInfoPtr = NewSocketInfo(newSocket); - - /* - * Select on read/write events and create the channel. - */ - - newInfoPtr->selectEvents = (FD_READ | FD_WRITE | FD_CLOSE); - (void) (*winSock.WSAAsyncSelect)(newInfoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, newInfoPtr->selectEvents); - - wsprintfA(channelName, "sock%d", newInfoPtr->socket); - newInfoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - (ClientData) newInfoPtr, (TCL_READABLE | TCL_WRITABLE)); - if (Tcl_SetChannelOption(NULL, newInfoPtr->channel, "-translation", - "auto crlf") == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, newInfoPtr->channel); - return; - } - if (Tcl_SetChannelOption(NULL, newInfoPtr->channel, "-eofchar", "") - == TCL_ERROR) { - Tcl_Close((Tcl_Interp *) NULL, newInfoPtr->channel); - return; - } - - /* - * Invoke the accept callback procedure. - */ - - if (infoPtr->acceptProc != NULL) { - (infoPtr->acceptProc) (infoPtr->acceptProcData, newInfoPtr->channel, - (*winSock.inet_ntoa)(addr.sin_addr), - (*winSock.ntohs)(addr.sin_port)); - } -} - -/* - *---------------------------------------------------------------------- - * - * TcpInputProc -- - * - * This procedure is called by the generic IO level to read data from - * a socket based channel. - * - * Results: - * The number of bytes read or -1 on error. - * - * Side effects: - * Consumes input from the socket. - * - *---------------------------------------------------------------------- - */ - -static int -TcpInputProc(instanceData, buf, toRead, errorCodePtr) - ClientData instanceData; /* The socket state. */ - char *buf; /* Where to store data. */ - int toRead; /* Maximum number of bytes to read. */ - int *errorCodePtr; /* Where to store error codes. */ -{ - SocketInfo *infoPtr = (SocketInfo *) instanceData; - int bytesRead; - int error; - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - *errorCodePtr = 0; - - /* - * 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()) { - *errorCodePtr = EFAULT; - return -1; - } - - /* - * First check to see if EOF was already detected, to prevent - * calling the socket stack after the first time EOF is detected. - */ - - if (infoPtr->flags & SOCKET_EOF) { - return 0; - } - - /* - * Check to see if the socket is connected before trying to read. - */ - - if ((infoPtr->flags & SOCKET_ASYNC_CONNECT) - && ! WaitForSocketEvent(infoPtr, FD_CONNECT, errorCodePtr)) { - return -1; - } - - /* - * No EOF, and it is connected, so try to read more from the socket. - * Note that we clear the FD_READ bit because read events are level - * triggered so a new event will be generated if there is still data - * available to be read. We have to simulate blocking behavior here - * since we are always using non-blocking sockets. - */ - - while (1) { - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - 0, 0); - bytesRead = (*winSock.recv)(infoPtr->socket, buf, toRead, 0); - infoPtr->readyEvents &= ~(FD_READ); - - /* - * Check for end-of-file condition or successful read. - */ - - if (bytesRead == 0) { - infoPtr->flags |= SOCKET_EOF; - } - if (bytesRead != SOCKET_ERROR) { - break; - } - - /* - * If an error occurs after the FD_CLOSE has arrived, - * then ignore the error and report an EOF. - */ - - if (infoPtr->readyEvents & FD_CLOSE) { - infoPtr->flags |= SOCKET_EOF; - bytesRead = 0; - break; - } - - /* - * Check for error condition or underflow in non-blocking case. - */ - - error = (*winSock.WSAGetLastError)(); - if ((infoPtr->flags & SOCKET_ASYNC) || (error != WSAEWOULDBLOCK)) { - TclWinConvertWSAError(error); - *errorCodePtr = Tcl_GetErrno(); - bytesRead = -1; - break; - } - - /* - * In the blocking case, wait until the file becomes readable - * or closed and try again. - */ - - if (!WaitForSocketEvent(infoPtr, FD_READ|FD_CLOSE, errorCodePtr)) { - bytesRead = -1; - break; - } - } - - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - return bytesRead; -} - -/* - *---------------------------------------------------------------------- - * - * TcpOutputProc -- - * - * This procedure is called by the generic IO level to write data - * to a socket based channel. - * - * Results: - * The number of bytes written or -1 on failure. - * - * Side effects: - * Produces output on the socket. - * - *---------------------------------------------------------------------- - */ - -static int -TcpOutputProc(instanceData, buf, toWrite, errorCodePtr) - ClientData instanceData; /* The socket state. */ - char *buf; /* Where to get data. */ - int toWrite; /* Maximum number of bytes to write. */ - int *errorCodePtr; /* Where to store error codes. */ -{ - SocketInfo *infoPtr = (SocketInfo *) instanceData; - int bytesWritten; - int error; - ThreadSpecificData *tsdPtr = - (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); - - *errorCodePtr = 0; - - /* - * 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()) { - *errorCodePtr = EFAULT; - return -1; - } - - /* - * Check to see if the socket is connected before trying to write. - */ - - if ((infoPtr->flags & SOCKET_ASYNC_CONNECT) - && ! WaitForSocketEvent(infoPtr, FD_CONNECT, errorCodePtr)) { - return -1; - } - - while (1) { - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - 0, 0); - bytesWritten = (*winSock.send)(infoPtr->socket, buf, toWrite, 0); - if (bytesWritten != SOCKET_ERROR) { - /* - * Since Windows won't generate a new write event until we hit - * an overflow condition, we need to force the event loop to - * poll until the condition changes. - */ - - if (infoPtr->watchEvents & FD_WRITE) { - Tcl_Time blockTime = { 0, 0 }; - Tcl_SetMaxBlockTime(&blockTime); - } - break; - } - - /* - * Check for error condition or overflow. In the event of overflow, we - * need to clear the FD_WRITE flag so we can detect the next writable - * event. Note that Windows only sends a new writable event after a - * send fails with WSAEWOULDBLOCK. - */ - - error = (*winSock.WSAGetLastError)(); - if (error == WSAEWOULDBLOCK) { - infoPtr->readyEvents &= ~(FD_WRITE); - if (infoPtr->flags & SOCKET_ASYNC) { - *errorCodePtr = EWOULDBLOCK; - bytesWritten = -1; - break; - } - } else { - TclWinConvertWSAError(error); - *errorCodePtr = Tcl_GetErrno(); - bytesWritten = -1; - break; - } - - /* - * In the blocking case, wait until the file becomes writable - * or closed and try again. - */ - - if (!WaitForSocketEvent(infoPtr, FD_WRITE|FD_CLOSE, errorCodePtr)) { - bytesWritten = -1; - break; - } - } - - (void) (*winSock.WSAAsyncSelect)(infoPtr->socket, tsdPtr->hwnd, - SOCKET_MESSAGE, infoPtr->selectEvents); - return bytesWritten; -} - -/* - *---------------------------------------------------------------------- - * - * TcpGetOptionProc -- - * - * Computes an option value for a TCP socket based channel, or a - * list of all options and their values. - * - * Note: This code is based on code contributed by John Haxby. - * - * Results: - * A standard Tcl result. The value of the specified option or a - * list of all options and their values is returned in the - * supplied DString. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -TcpGetOptionProc(instanceData, interp, optionName, dsPtr) - ClientData instanceData; /* Socket state. */ - Tcl_Interp *interp; /* For error reporting - can be NULL */ - char *optionName; /* Name of the option to - * retrieve the value for, or - * NULL to get all options and - * their values. */ - Tcl_DString *dsPtr; /* Where to store the computed - * value; initialized by caller. */ -{ - SocketInfo *infoPtr; - struct sockaddr_in sockname; - struct sockaddr_in peername; - struct hostent *hostEntPtr; - SOCKET sock; - int size = sizeof(struct sockaddr_in); - size_t len = 0; - char buf[TCL_INTEGER_SPACE]; - - /* - * 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()) { - if (interp) { - Tcl_AppendResult(interp, "winsock is not initialized", NULL); - } - return TCL_ERROR; - } - - infoPtr = (SocketInfo *) instanceData; - sock = (int) infoPtr->socket; - if (optionName != (char *) NULL) { - len = strlen(optionName); - } - - if ((len > 1) && (optionName[1] == 'e') && - (strncmp(optionName, "-error", len) == 0)) { - int optlen; - int err, ret; - - optlen = sizeof(int); - ret = TclWinGetSockOpt(sock, SOL_SOCKET, SO_ERROR, - (char *)&err, &optlen); - if (ret == SOCKET_ERROR) { - err = (*winSock.WSAGetLastError)(); - } - if (err) { - TclWinConvertWSAError(err); - Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(Tcl_GetErrno()), -1); - } - return TCL_OK; - } - - if ((len == 0) || - ((len > 1) && (optionName[1] == 'p') && - (strncmp(optionName, "-peername", len) == 0))) { - if ((*winSock.getpeername)(sock, (struct sockaddr *) &peername, &size) - == 0) { - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-peername"); - Tcl_DStringStartSublist(dsPtr); - } - Tcl_DStringAppendElement(dsPtr, - (*winSock.inet_ntoa)(peername.sin_addr)); - hostEntPtr = (*winSock.gethostbyaddr)( - (char *) &(peername.sin_addr), sizeof(peername.sin_addr), - AF_INET); - if (hostEntPtr != (struct hostent *) NULL) { - Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name); - } else { - Tcl_DStringAppendElement(dsPtr, - (*winSock.inet_ntoa)(peername.sin_addr)); - } - TclFormatInt(buf, (*winSock.ntohs)(peername.sin_port)); - Tcl_DStringAppendElement(dsPtr, buf); - if (len == 0) { - Tcl_DStringEndSublist(dsPtr); - } else { - return TCL_OK; - } - } else { - /* - * getpeername failed - but if we were asked for all the options - * (len==0), don't flag an error at that point because it could - * be an fconfigure request on a server socket. (which have - * no peer). {copied from unix/tclUnixChan.c} - */ - if (len) { - TclWinConvertWSAError((*winSock.WSAGetLastError)()); - if (interp) { - Tcl_AppendResult(interp, "can't get peername: ", - Tcl_PosixError(interp), - (char *) NULL); - } - return TCL_ERROR; - } - } - } - - if ((len == 0) || - ((len > 1) && (optionName[1] == 's') && - (strncmp(optionName, "-sockname", len) == 0))) { - if ((*winSock.getsockname)(sock, (struct sockaddr *) &sockname, &size) - == 0) { - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-sockname"); - Tcl_DStringStartSublist(dsPtr); - } - Tcl_DStringAppendElement(dsPtr, - (*winSock.inet_ntoa)(sockname.sin_addr)); - hostEntPtr = (*winSock.gethostbyaddr)( - (char *) &(sockname.sin_addr), sizeof(peername.sin_addr), - AF_INET); - if (hostEntPtr != (struct hostent *) NULL) { - Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name); - } else { - Tcl_DStringAppendElement(dsPtr, - (*winSock.inet_ntoa)(sockname.sin_addr)); - } - TclFormatInt(buf, (*winSock.ntohs)(sockname.sin_port)); - Tcl_DStringAppendElement(dsPtr, buf); - if (len == 0) { - Tcl_DStringEndSublist(dsPtr); - } else { - return TCL_OK; - } - } else { - if (interp) { - TclWinConvertWSAError((*winSock.WSAGetLastError)()); - Tcl_AppendResult(interp, "can't get sockname: ", - Tcl_PosixError(interp), - (char *) NULL); - } - return TCL_ERROR; - } - } - - if (len > 0) { - return Tcl_BadChannelOption(interp, optionName, "peername sockname"); - } - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TcpWatchProc -- - * - * Informs the channel driver of the events that the generic - * channel code wishes to receive on this socket. - * - * Results: - * None. - * - * Side effects: - * May cause the notifier to poll if any of the specified - * conditions are already true. - * - *---------------------------------------------------------------------- - */ - -static void -TcpWatchProc(instanceData, mask) - ClientData instanceData; /* The socket state. */ - int mask; /* Events of interest; an OR-ed - * combination of TCL_READABLE, - * TCL_WRITABLE and TCL_EXCEPTION. */ -{ - SocketInfo *infoPtr = (SocketInfo *) instanceData; - - /* - * Update the watch events mask. - */ - - infoPtr->watchEvents = 0; - if (mask & TCL_READABLE) { - infoPtr->watchEvents |= (FD_READ|FD_CLOSE|FD_ACCEPT); - } - if (mask & TCL_WRITABLE) { - infoPtr->watchEvents |= (FD_WRITE|FD_CONNECT); - } - - /* - * If there are any conditions already set, then tell the notifier to poll - * rather than block. - */ - - if (infoPtr->readyEvents & infoPtr->watchEvents) { - Tcl_Time blockTime = { 0, 0 }; - Tcl_SetMaxBlockTime(&blockTime); - } -} - -/* - *---------------------------------------------------------------------- - * - * TcpGetProc -- - * - * Called from Tcl_GetChannelHandle to retrieve an OS handle from inside - * a TCP socket based channel. - * - * Results: - * Returns TCL_OK with the socket in handlePtr. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -TcpGetHandleProc(instanceData, direction, handlePtr) - ClientData instanceData; /* The socket state. */ - int direction; /* Not used. */ - ClientData *handlePtr; /* Where to store the handle. */ -{ - SocketInfo *statePtr = (SocketInfo *) instanceData; - - *handlePtr = (ClientData) statePtr->socket; - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * SocketProc -- - * - * This function is called when WSAAsyncSelect has been used - * to register interest in a socket event, and the event has - * occurred. - * - * Results: - * 0 on success. - * - * Side effects: - * The flags for the given socket are updated to reflect the - * event that occured. - * - *---------------------------------------------------------------------- - */ - -static LRESULT CALLBACK -SocketProc(hwnd, message, wParam, lParam) - HWND hwnd; - UINT message; - WPARAM wParam; - LPARAM lParam; -{ - int event, error; - SOCKET socket; - SocketInfo *infoPtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (message != SOCKET_MESSAGE) { - return DefWindowProc(hwnd, message, wParam, lParam); - } - - event = WSAGETSELECTEVENT(lParam); - error = WSAGETSELECTERROR(lParam); - socket = (SOCKET) wParam; - - /* - * Find the specified socket on the socket list and update its - * eventState flag. - */ - - for (infoPtr = tsdPtr->socketList; infoPtr != NULL; - infoPtr = infoPtr->nextPtr) { - if (infoPtr->socket == socket) { - /* - * Update the socket state. - */ - - if (event & FD_CLOSE) { - infoPtr->readyEvents &= ~(FD_WRITE|FD_ACCEPT); - } - if (event & FD_CONNECT) { - /* - * The socket is now connected, so 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(error); - infoPtr->lastError = Tcl_GetErrno(); - } - - } - if(infoPtr->flags & SOCKET_ASYNC_CONNECT) { - infoPtr->flags &= ~(SOCKET_ASYNC_CONNECT); - if (error != ERROR_SUCCESS) { - TclWinConvertWSAError(error); - infoPtr->lastError = Tcl_GetErrno(); - } - infoPtr->readyEvents |= FD_WRITE; - } - infoPtr->readyEvents |= event; - break; - } - } - - /* - * Flush the Tcl event queue before returning to the event loop. - */ - - Tcl_ServiceAll(); - - return 0; -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_GetHostName -- - * - * Returns the name of the local host. - * - * Results: - * A string containing the network name for this machine, or - * an empty string if we can't figure out the name. The caller - * must not modify or free this string. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -char * -Tcl_GetHostName() -{ - DWORD length; - WCHAR wbuf[MAX_COMPUTERNAME_LENGTH + 1]; - - Tcl_MutexLock(&socketMutex); - if (hostnameInitialized) { - Tcl_MutexUnlock(&socketMutex); - return hostname; - } - - if (TclpHasSockets(NULL) == TCL_OK) { - /* - * INTL: bug - */ - - if ((*winSock.gethostname)(hostname, sizeof(hostname)) == 0) { - hostnameInitialized = 1; - Tcl_MutexUnlock(&socketMutex); - return hostname; - } - } - length = sizeof(hostname); - if ((*tclWinProcs->getComputerNameProc)(wbuf, &length) != 0) { - /* - * Convert string from native to UTF then change to lowercase. - */ - - Tcl_DString ds; - - lstrcpynA(hostname, Tcl_WinTCharToUtf((TCHAR *) wbuf, -1, &ds), - sizeof(hostname)); - Tcl_DStringFree(&ds); - Tcl_UtfToLower(hostname); - } else { - hostname[0] = '\0'; - } - hostnameInitialized = 1; - Tcl_MutexUnlock(&socketMutex); - return hostname; -} - -/* - *---------------------------------------------------------------------- - * - * TclWinGetSockOpt, et al. -- - * - * These functions are wrappers that let us bind the WinSock - * API dynamically so we can run on systems that don't have - * the wsock32.dll. We need wrappers for these interfaces - * because they are called from the generic Tcl code. - * - * Results: - * As defined for each function. - * - * Side effects: - * As defined for each function. - * - *---------------------------------------------------------------------- - */ - -int -TclWinGetSockOpt(SOCKET s, int level, int optname, char * optval, - int FAR *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 (*winSock.getsockopt)(s, level, optname, optval, optlen); -} - -int -TclWinSetSockOpt(SOCKET s, int level, int optname, 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 (*winSock.setsockopt)(s, level, optname, optval, optlen); -} - -u_short -TclWinNToHS(u_short netshort) -{ - /* - * 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 (*winSock.ntohs)(netshort); -} - -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 (struct servent *) NULL; - } - - return (*winSock.getservbyname)(name, proto); -} |