diff options
Diffstat (limited to 'win/tclWinSock.c')
| -rw-r--r-- | win/tclWinSock.c | 3515 |
1 files changed, 1401 insertions, 2114 deletions
diff --git a/win/tclWinSock.c b/win/tclWinSock.c index 5e0d7c8..8f565b9 100644 --- a/win/tclWinSock.c +++ b/win/tclWinSock.c @@ -9,9 +9,6 @@ * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * ----------------------------------------------------------------------- - * The order and naming of functions in this file should minimize - * the file diff to tclUnixSock.c. - * ----------------------------------------------------------------------- * * General information on how this module works. * @@ -62,17 +59,13 @@ #undef TCL_FEATURE_KEEPALIVE_NAGLE /* - * Helper macros to make parts of this file clearer. The macros do exactly - * what they say on the tin. :-) They also only ever refer to their arguments - * once, and so can be used without regard to side effects. + * Make sure to remove the redirection defines set in tclWinPort.h that is in + * use in other sections of the core, except for us. */ -#define SET_BITS(var, bits) ((var) |= (bits)) -#define CLEAR_BITS(var, bits) ((var) &= ~(bits)) - -/* "sock" + a pointer in hex + \0 */ -#define SOCK_CHAN_LENGTH (4 + sizeof(void *) * 2 + 1) -#define SOCK_TEMPLATE "sock%p" +#undef getservbyname +#undef getsockopt +#undef setsockopt /* * The following variable is used to tell whether this module has been @@ -81,107 +74,58 @@ */ static int initialized = 0; -static const TCHAR className[] = TEXT("TclSocket"); TCL_DECLARE_MUTEX(socketMutex) /* - * The following defines declare the messages used on socket windows. + * The following variable holds the network name of this host. */ -#define SOCKET_MESSAGE WM_USER+1 -#define SOCKET_SELECT WM_USER+2 -#define SOCKET_TERMINATE WM_USER+3 -#define SELECT TRUE -#define UNSELECT FALSE +static TclInitProcessGlobalValueProc InitializeHostName; +static ProcessGlobalValue hostName = { + 0, 0, NULL, NULL, InitializeHostName, NULL, NULL +}; /* - * This is needed to comply with the strict aliasing rules of GCC, but it also - * simplifies casting between the different sockaddr types. + * The following defines declare the messages used on socket windows. */ -typedef union { - struct sockaddr sa; - struct sockaddr_in sa4; - struct sockaddr_in6 sa6; - struct sockaddr_storage sas; -} address; - -#ifndef IN6_ARE_ADDR_EQUAL -#define IN6_ARE_ADDR_EQUAL IN6_ADDR_EQUAL -#endif +#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 structure describes per-instance state of a tcp based channel. + * The following structure is used to store the data associated with each + * socket. + * All members modified by the notifier thread are defined as volatile. */ -typedef struct TcpState TcpState; - -typedef struct TcpFdList { - TcpState *statePtr; - SOCKET fd; - struct TcpFdList *next; -} TcpFdList; - -struct TcpState { +typedef struct SocketInfo { Tcl_Channel channel; /* Channel associated with this socket. */ - struct TcpFdList *sockets; /* Windows SOCKET handle. */ - int flags; /* Bit field comprised of the flags described + SOCKET socket; /* Windows SOCKET handle. */ + volatile 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. */ volatile int readyEvents; /* OR'ed combination of FD_READ, FD_WRITE, * FD_CLOSE, FD_ACCEPT and FD_CONNECT that - * indicate which events have occurred. - * Set by notifier thread, access must be - * protected by semaphore */ + * 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. */ volatile int acceptEventCount; /* Count of the current number of FD_ACCEPTs - * that have arrived and not yet processed. - * Set by notifier thread, access must be - * protected by semaphore */ + * that have arrived and not yet processed. */ Tcl_TcpAcceptProc *acceptProc; /* Proc to call on accept. */ ClientData acceptProcData; /* The data for the accept proc. */ - - /* - * Only needed for client sockets - */ - - struct addrinfo *addrlist; /* Addresses to connect to. */ - struct addrinfo *addr; /* Iterator over addrlist. */ - struct addrinfo *myaddrlist;/* Local address. */ - struct addrinfo *myaddr; /* Iterator over myaddrlist. */ - int connectError; /* Cache status of async socket. */ - int cachedBlocking; /* Cache blocking mode of async socket. */ - volatile int notifierConnectError; - /* Async connect error set by notifier thread. - * This error is still a windows error code. - * Access must be protected by semaphore */ - struct TcpState *nextPtr; /* The next socket on the per-thread socket + volatile int lastError; /* Error code from last message. */ + struct SocketInfo *nextPtr; /* The next socket on the per-thread socket * list. */ -}; - -/* - * These bits may be ORed together into the "flags" field of a TcpState - * structure. - */ - -#define TCP_NONBLOCKING (1<<0) /* Socket with non-blocking I/O */ -#define TCP_ASYNC_CONNECT (1<<1) /* Async connect in progress. */ -#define SOCKET_EOF (1<<2) /* A zero read happened on the - * socket. */ -#define SOCKET_PENDING (1<<3) /* A message has been sent for this - * socket */ -#define TCP_ASYNC_PENDING (1<<4) /* TcpConnect was called to - * process an async connect. This - * flag indicates that reentry is - * still pending */ -#define TCP_ASYNC_FAILED (1<<5) /* An async connect finally failed */ +} SocketInfo; /* * The following structure is what is added to the Tcl event queue when a @@ -192,8 +136,8 @@ typedef struct { Tcl_Event header; /* Information that is standard for all * events. */ SOCKET socket; /* Socket descriptor that is ready. Used to - * find the TcpState structure for the file - * (can't point directly to the TcpState + * 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; @@ -204,6 +148,17 @@ typedef struct { #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 { HWND hwnd; /* Handle to window for socket messages. */ @@ -214,11 +169,11 @@ typedef struct { * socketThread has been initialized and has * started. */ HANDLE socketListLock; /* Win32 Event to lock the socketList */ - TcpState *pendingTcpState; + SocketInfo *pendingSocketInfo; /* This socket is opened but not jet in the * list. This value is also checked by * the event structure. */ - TcpState *socketList; /* Every open socket in this thread has an + SocketInfo *socketList; /* Every open socket in this thread has an * entry on this list. */ } ThreadSpecificData; @@ -226,23 +181,23 @@ static Tcl_ThreadDataKey dataKey; static WNDCLASS windowClass; /* - * Static routines for this file: + * Static functions defined in this file. */ -static int TcpConnect(Tcl_Interp *interp, - TcpState *state); +static SocketInfo * CreateSocket(Tcl_Interp *interp, int port, + const char *host, int server, const char *myaddr, + int myport, int async); +static int CreateSocketAddress(LPSOCKADDR_IN sockaddrPtr, + const char *host, int port); static void InitSockets(void); -static TcpState * NewSocketInfo(SOCKET socket); +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, SOCKET newSocket, address addr); -static int WaitForConnect(TcpState *statePtr, int *errorCodePtr); -static int WaitForSocketEvent(TcpState *statePtr, int events, +static void TcpAccept(SocketInfo *infoPtr); +static int WaitForSocketEvent(SocketInfo *infoPtr, int events, int *errorCodePtr); -static void AddSocketInfoFd(TcpState *statePtr, SOCKET socket); -static int FindFDInList(TcpState *statePtr, SOCKET socket); static DWORD WINAPI SocketThread(LPVOID arg); static void TcpThreadActionProc(ClientData instanceData, int action); @@ -250,9 +205,8 @@ static void TcpThreadActionProc(ClientData instanceData, static Tcl_EventCheckProc SocketCheckProc; static Tcl_EventProc SocketEventProc; static Tcl_EventSetupProc SocketSetupProc; -static Tcl_DriverBlockModeProc TcpBlockModeProc; +static Tcl_DriverBlockModeProc TcpBlockProc; static Tcl_DriverCloseProc TcpCloseProc; -static Tcl_DriverClose2Proc TcpClose2Proc; static Tcl_DriverSetOptionProc TcpSetOptionProc; static Tcl_DriverGetOptionProc TcpGetOptionProc; static Tcl_DriverInputProc TcpInputProc; @@ -262,180 +216,192 @@ static Tcl_DriverGetHandleProc TcpGetHandleProc; /* * This structure describes the channel type structure for TCP socket - * based IO: + * based IO. */ -static const Tcl_ChannelType tcpChannelType = { - "tcp", /* Type name. */ - TCL_CHANNEL_VERSION_5, /* v5 channel */ - TcpCloseProc, /* Close proc. */ - TcpInputProc, /* Input proc. */ - TcpOutputProc, /* Output proc. */ - NULL, /* Seek proc. */ - TcpSetOptionProc, /* Set option proc. */ - TcpGetOptionProc, /* Get option proc. */ - TcpWatchProc, /* Initialize notifier. */ - TcpGetHandleProc, /* Get OS handles out of channel. */ - TcpClose2Proc, /* Close2 proc. */ - TcpBlockModeProc, /* Set blocking or non-blocking mode.*/ - NULL, /* flush proc. */ - NULL, /* handler proc. */ - NULL, /* wide seek proc. */ - TcpThreadActionProc, /* thread action proc. */ - NULL /* truncate proc. */ +static Tcl_ChannelType tcpChannelType = { + "tcp", /* Type name. */ + TCL_CHANNEL_VERSION_5, /* v5 channel */ + TcpCloseProc, /* Close proc. */ + TcpInputProc, /* Input proc. */ + TcpOutputProc, /* Output proc. */ + NULL, /* Seek proc. */ + TcpSetOptionProc, /* Set option proc. */ + TcpGetOptionProc, /* Get option proc. */ + TcpWatchProc, /* Set up notifier to watch this channel. */ + TcpGetHandleProc, /* Get an OS handle from channel. */ + NULL, /* close2proc. */ + TcpBlockProc, /* Set socket into (non-)blocking mode. */ + NULL, /* flush proc. */ + NULL, /* handler proc. */ + NULL, /* wide seek proc */ + TcpThreadActionProc, /* thread action proc */ + NULL, /* truncate */ }; - -/* - * The following variable holds the network name of this host. - */ - -static TclInitProcessGlobalValueProc InitializeHostName; -static ProcessGlobalValue hostName = - {0, 0, NULL, NULL, InitializeHostName, NULL, NULL}; - -/* - * Address print debug functions - */ -#if 0 -void printaddrinfo(struct addrinfo *ai, char *prefix) -{ - char host[NI_MAXHOST], port[NI_MAXSERV]; - getnameinfo(ai->ai_addr, ai->ai_addrlen, - host, sizeof(host), - port, sizeof(port), - NI_NUMERICHOST|NI_NUMERICSERV); -} -void printaddrinfolist(struct addrinfo *addrlist, char *prefix) -{ - struct addrinfo *ai; - for (ai = addrlist; ai != NULL; ai = ai->ai_next) { - printaddrinfo(ai, prefix); - } -} -#endif /* *---------------------------------------------------------------------- * - * InitializeHostName -- + * InitSockets -- * - * This routine sets the process global value of the name of the local - * host on which the process is running. + * Initialize the socket module. If winsock startup is successful, + * registers the event window for the socket notifier code. + * + * Assumes socketMutex is held. * * Results: * None. * + * Side effects: + * Initializes winsock, registers a new window class and creates a + * window for use in asynchronous socket notification. + * *---------------------------------------------------------------------- */ -void -InitializeHostName( - char **valuePtr, - size_t *lengthPtr, - Tcl_Encoding *encodingPtr) +static void +InitSockets(void) { - TCHAR tbuf[MAX_COMPUTERNAME_LENGTH + 1]; - DWORD length = MAX_COMPUTERNAME_LENGTH + 1; - Tcl_DString ds; + DWORD id; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) + TclThreadDataKeyGet(&dataKey); + + if (!initialized) { + initialized = 1; + TclCreateLateExitHandler(SocketExitHandler, (ClientData) NULL); - if (GetComputerName(tbuf, &length) != 0) { /* - * Convert string from native to UTF then change to lowercase. + * 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. */ - Tcl_UtfToLower(Tcl_WinTCharToUtf(tbuf, -1, &ds)); + windowClass.style = 0; + windowClass.cbClsExtra = 0; + windowClass.cbWndExtra = 0; + windowClass.hInstance = TclWinGetTclInstance(); + windowClass.hbrBackground = NULL; + windowClass.lpszMenuName = NULL; + windowClass.lpszClassName = "TclSocket"; + windowClass.lpfnWndProc = SocketProc; + windowClass.hIcon = NULL; + windowClass.hCursor = NULL; - } else { - Tcl_DStringInit(&ds); - if (TclpHasSockets(NULL) == TCL_OK) { - /* - * The buffer size of 256 is recommended by the MSDN page that - * documents gethostname() as being always adequate. - */ + if (!RegisterClassA(&windowClass)) { + TclWinConvertError(GetLastError()); + goto initFailure; + } - Tcl_DString inDs; + } - Tcl_DStringInit(&inDs); - Tcl_DStringSetLength(&inDs, 256); - if (gethostname(Tcl_DStringValue(&inDs), - Tcl_DStringLength(&inDs)) == 0) { - Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&inDs), -1, - &ds); - } - Tcl_DStringFree(&inDs); + /* + * Check for per-thread initialization. + */ + + if (tsdPtr == NULL) { + tsdPtr = TCL_TSD_INIT(&dataKey); + tsdPtr->pendingSocketInfo = NULL; + 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; + } + + SetThreadPriority(tsdPtr->socketThread, THREAD_PRIORITY_HIGHEST); + + /* + * Wait for the thread to signal when the window has been created and + * if it is ready to go. + */ + + WaitForSingleObject(tsdPtr->readyEvent, INFINITE); + + if (tsdPtr->hwnd == NULL) { + goto initFailure; /* Trouble creating the window */ + } + + Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); } + return; - *encodingPtr = Tcl_GetEncoding(NULL, "utf-8"); - *lengthPtr = Tcl_DStringLength(&ds); - *valuePtr = ckalloc(*lengthPtr + 1); - memcpy(*valuePtr, Tcl_DStringValue(&ds), *lengthPtr + 1); - Tcl_DStringFree(&ds); + initFailure: + TclpFinalizeSockets(); + initialized = -1; + return; } /* *---------------------------------------------------------------------- * - * Tcl_GetHostName -- + * SocketsEnabled -- * - * Returns the name of the local host. + * Check that the WinSock was successfully initialized. * * 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. + * 1 if it is. * * Side effects: - * Caches the name to return for future calls. + * None. * *---------------------------------------------------------------------- */ -const char * -Tcl_GetHostName(void) + /* ARGSUSED */ +static int +SocketsEnabled(void) { - return Tcl_GetString(TclGetProcessGlobalValue(&hostName)); + int enabled; + Tcl_MutexLock(&socketMutex); + enabled = (initialized == 1); + Tcl_MutexUnlock(&socketMutex); + return enabled; } + /* *---------------------------------------------------------------------- * - * TclpHasSockets -- + * SocketExitHandler -- * - * 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. + * Callback invoked during exit clean up to delete the socket + * communication window and to release the WinSock DLL. * * Results: - * Returns TCL_OK if the system supports sockets, or TCL_ERROR with an - * error in interp (if non-NULL). + * None. * * Side effects: - * If not already prepared, initializes the TSD structure and socket - * message handling thread associated to the calling thread for the - * subsystem of the driver. + * None. * *---------------------------------------------------------------------- */ -int -TclpHasSockets( - Tcl_Interp *interp) /* Where to write an error message if sockets - * are not present, or NULL if no such message - * is to be written. */ + /* ARGSUSED */ +static void +SocketExitHandler( + ClientData clientData) /* Not used. */ { Tcl_MutexLock(&socketMutex); - InitSockets(); - Tcl_MutexUnlock(&socketMutex); + /* + * Make sure the socket event handling window is cleaned-up for, at + * most, this thread. + */ - if (SocketsEnabled()) { - return TCL_OK; - } - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "sockets are not available on this system", -1)); - } - return TCL_ERROR; + TclpFinalizeSockets(); + UnregisterClass("TclSocket", TclWinGetTclInstance()); + initialized = 0; + Tcl_MutexUnlock(&socketMutex); } /* @@ -460,490 +426,346 @@ TclpHasSockets( void TclpFinalizeSockets(void) { - ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); - - /* - * Careful! This is a finalizer! - */ - - if (tsdPtr == NULL) { - return; - } - - 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. - */ + ThreadSpecificData *tsdPtr; - WaitForSingleObject(tsdPtr->readyEvent, INFINITE); - tsdPtr->hwnd = NULL; + tsdPtr = (ThreadSpecificData *) TclThreadDataKeyGet(&dataKey); + if (tsdPtr != NULL) { + if (tsdPtr->socketThread != NULL) { + if (tsdPtr->hwnd != NULL) { + if (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; + } + CloseHandle(tsdPtr->socketThread); + tsdPtr->socketThread = 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->readyEvent != NULL) { + CloseHandle(tsdPtr->readyEvent); + tsdPtr->readyEvent = NULL; + } + if (tsdPtr->socketListLock != NULL) { + CloseHandle(tsdPtr->socketListLock); + tsdPtr->socketListLock = NULL; + } + Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); } - Tcl_DeleteEventSource(SocketSetupProc, SocketCheckProc, NULL); } /* *---------------------------------------------------------------------- * - * TcpBlockModeProc -- + * TclpHasSockets -- * - * This function is invoked by the generic IO level to set blocking and - * nonblocking mode on a TCP socket based channel. + * 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: - * 0 if successful, errno when failed. + * Returns TCL_OK if the system supports sockets, or TCL_ERROR with an + * error in interp (if non-NULL). * * Side effects: - * Sets the device into blocking or nonblocking mode. + * If not already prepared, initializes the TSD structure and socket + * message handling thread associated to the calling thread for the + * subsystem of the driver. * *---------------------------------------------------------------------- */ - /* ARGSUSED */ -static int -TcpBlockModeProc( - ClientData instanceData, /* Socket state. */ - int mode) /* The mode to set. Can be one of - * TCL_MODE_BLOCKING or - * TCL_MODE_NONBLOCKING. */ +int +TclpHasSockets( + Tcl_Interp *interp) /* Where to write an error message if sockets + * are not present, or NULL if no such message + * is to be written. */ { - TcpState *statePtr = instanceData; + Tcl_MutexLock(&socketMutex); + InitSockets(); + Tcl_MutexUnlock(&socketMutex); - if (mode == TCL_MODE_NONBLOCKING) { - statePtr->flags |= TCP_NONBLOCKING; - } else { - statePtr->flags &= ~(TCP_NONBLOCKING); + if (SocketsEnabled()) { + return TCL_OK; } - return 0; + if (interp != NULL) { + Tcl_AppendResult(interp, "sockets are not available on this system", + NULL); + } + return TCL_ERROR; } /* *---------------------------------------------------------------------- * - * WaitForConnect -- - * - * Check the state of an async connect process. If a connection - * attempt terminated, process it, which may finalize it or may - * start the next attempt. If a connect error occures, it is saved - * in statePtr->connectError to be reported by 'fconfigure -error'. + * SocketSetupProc -- * - * There are two modes of operation, defined by errorCodePtr: - * * non-NULL: Called by explicite read/write command. block if - * socket is blocking. - * May return two error codes: - * * EWOULDBLOCK: if connect is still in progress - * * ENOTCONN: if connect failed. This would be the error - * message of a rect or sendto syscall so this is - * emulated here. - * * Null: Called by a backround operation. Do not block and - * don't return any error code. + * This function is invoked before Tcl_DoOneEvent blocks waiting for an + * event. * * Results: - * 0 if the connection has completed, -1 if still in progress - * or there is an error. + * None. * * Side effects: - * Processes socket events off the system queue. - * May process asynchroneous connect. + * Adjusts the block time if needed. * *---------------------------------------------------------------------- */ -static int -WaitForConnect( - TcpState *statePtr, /* State of the socket. */ - int *errorCodePtr) /* Where to store errors? - * A passed null-pointer activates background mode. - */ +void +SocketSetupProc( + ClientData data, /* Not used. */ + int flags) /* Event flags as passed to Tcl_DoOneEvent. */ { - int result; - int oldMode; - ThreadSpecificData *tsdPtr; - - /* - * Check if an async connect failed already and error reporting is demanded, - * return the error ENOTCONN - */ + SocketInfo *infoPtr; + Tcl_Time blockTime = { 0, 0 }; + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - if (errorCodePtr != NULL && (statePtr->flags & TCP_ASYNC_FAILED)) { - *errorCodePtr = ENOTCONN; - return -1; + if (!(flags & TCL_FILE_EVENTS)) { + return; } /* - * Check if an async connect is running. If not return ok + * Check to see if there is a ready socket. If so, poll. */ - if (!(statePtr->flags & TCP_ASYNC_CONNECT)) { - return 0; + WaitForSingleObject(tsdPtr->socketListLock, INFINITE); + for (infoPtr = tsdPtr->socketList; infoPtr != NULL; + infoPtr = infoPtr->nextPtr) { + if (infoPtr->readyEvents & infoPtr->watchEvents) { + Tcl_SetMaxBlockTime(&blockTime); + break; + } } + SetEvent(tsdPtr->socketListLock); +} + +/* + *---------------------------------------------------------------------- + * + * SocketCheckProc -- + * + * This function is called by Tcl_DoOneEvent to check the socket event + * source for events. + * + * Results: + * None. + * + * Side effects: + * May queue an event. + * + *---------------------------------------------------------------------- + */ - /* - * Be sure to disable event servicing so we are truly modal. - */ +static void +SocketCheckProc( + ClientData data, /* Not used. */ + int flags) /* Event flags as passed to Tcl_DoOneEvent. */ +{ + SocketInfo *infoPtr; + SocketEvent *evPtr; + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - oldMode = Tcl_SetServiceMode(TCL_SERVICE_NONE); + if (!(flags & TCL_FILE_EVENTS)) { + return; + } /* - * Loop in the blocking case until the connect signal is present + * Queue events for any ready sockets that don't already have events + * queued (caused by persistent states that won't generate WinSock + * events). */ - while (1) { - - /* get statePtr lock */ - tsdPtr = TclThreadDataKeyGet(&dataKey); - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - - /* Check for connect event */ - if (statePtr->readyEvents & FD_CONNECT) { - - /* Consume the connect event */ - statePtr->readyEvents &= ~(FD_CONNECT); - - /* - * For blocking sockets and foreground processing - * disable async connect as we continue now synchoneously - */ - if ( errorCodePtr != NULL && - ! (statePtr->flags & TCP_NONBLOCKING) ) { - CLEAR_BITS(statePtr->flags, TCP_ASYNC_CONNECT); - } - - /* Free list lock */ - SetEvent(tsdPtr->socketListLock); - - /* - * Continue connect. - * If switched to synchroneous connect, the connect is terminated. - */ - result = TcpConnect(NULL, statePtr); - - /* Restore event service mode */ - (void) Tcl_SetServiceMode(oldMode); - - /* - * Check for Succesfull connect or async connect restart - */ - - if (result == TCL_OK) { - /* - * Check for async connect restart - * (not possible for foreground blocking operation) - */ - if ( statePtr->flags & TCP_ASYNC_PENDING ) { - if (errorCodePtr != NULL) { - *errorCodePtr = EWOULDBLOCK; - } - return -1; - } - return 0; - } - - /* - * Connect finally failed. - * For foreground operation return ENOTCONN. - */ - - if (errorCodePtr != NULL) { - *errorCodePtr = ENOTCONN; - } - return -1; - } - - /* Free list lock */ - SetEvent(tsdPtr->socketListLock); - - /* - * Background operation returns with no action as there was no connect - * event - */ - - if ( errorCodePtr == NULL ) { - return -1; - } - - /* - * A non blocking socket waiting for an asyncronous connect - * returns directly the error EWOULDBLOCK - */ - - if (statePtr->flags & TCP_NONBLOCKING) { - *errorCodePtr = EWOULDBLOCK; - return -1; + WaitForSingleObject(tsdPtr->socketListLock, INFINITE); + 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); } - - /* - * Wait until something happens. - */ - - WaitForSingleObject(tsdPtr->readyEvent, INFINITE); } + SetEvent(tsdPtr->socketListLock); } /* *---------------------------------------------------------------------- * - * TcpInputProc -- + * SocketEventProc -- * - * This function is invoked by the generic IO level to read input from a - * TCP socket based channel. + * This function is called by Tcl_ServiceEvent when a socket event + * reaches the front of the event queue. This function is responsible for + * notifying the generic channel code. * * Results: - * The number of bytes read is returned or -1 on error. An output - * argument contains the POSIX error code on error, or zero if no error - * occurred. + * 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: - * Reads input from the input device of the channel. + * Whatever the channel callback functions do. * *---------------------------------------------------------------------- */ - /* ARGSUSED */ static int -TcpInputProc( - ClientData instanceData, /* Socket state. */ - char *buf, /* Where to store data read. */ - int bufSize, /* How much space is available in the - * buffer? */ - int *errorCodePtr) /* Where to store error code. */ +SocketEventProc( + Tcl_Event *evPtr, /* Event to service. */ + int flags) /* Flags that indicate what events to handle, + * such as TCL_FILE_EVENTS. */ { - TcpState *statePtr = instanceData; - int bytesRead; - DWORD error; - ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); + SocketInfo *infoPtr; + SocketEvent *eventPtr = (SocketEvent *) evPtr; + int mask = 0; + int events; + ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - *errorCodePtr = 0; + if (!(flags & TCL_FILE_EVENTS)) { + return 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. + * Find the specified socket on the socket list. */ - if (!SocketsEnabled()) { - *errorCodePtr = EFAULT; - return -1; + WaitForSingleObject(tsdPtr->socketListLock, INFINITE); + for (infoPtr = tsdPtr->socketList; infoPtr != NULL; + infoPtr = infoPtr->nextPtr) { + if (infoPtr->socket == eventPtr->socket) { + break; + } } + SetEvent(tsdPtr->socketListLock); /* - * First check to see if EOF was already detected, to prevent calling the - * socket stack after the first time EOF is detected. + * Discard events that have gone stale. */ - if (statePtr->flags & SOCKET_EOF) { - return 0; + if (!infoPtr) { + return 1; } + infoPtr->flags &= ~SOCKET_PENDING; + /* - * Check if there is an async connect running. - * For blocking sockets terminate connect, otherwise do one step. - * For a non blocking socket return EWOULDBLOCK if connect not terminated + * Handle connection requests directly. */ - if (WaitForConnect(statePtr, errorCodePtr) != 0) { - return -1; + if (infoPtr->readyEvents & FD_ACCEPT) { + TcpAccept(infoPtr); + 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. + * Mask off unwanted events and compute the read/write mask so we can + * notify the channel. */ - while (1) { - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) UNSELECT, (LPARAM) statePtr); - /* single fd operation: this proc is only called for a connected socket. */ - bytesRead = recv(statePtr->sockets->fd, buf, bufSize, 0); - statePtr->readyEvents &= ~(FD_READ); + events = infoPtr->readyEvents & infoPtr->watchEvents; + if (events & FD_CLOSE) { /* - * Check for end-of-file condition or successful read. + * 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. */ - if (bytesRead == 0) { - statePtr->flags |= SOCKET_EOF; - } - if (bytesRead != SOCKET_ERROR) { - break; - } - + Tcl_Time blockTime = { 0, 0 }; + Tcl_SetMaxBlockTime(&blockTime); + mask |= TCL_READABLE|TCL_WRITABLE; + } else if (events & FD_READ) { /* - * If an error occurs after the FD_CLOSE has arrived, then ignore the - * error and report an EOF. + * Throw the readable event if an async connect failed. */ - if (statePtr->readyEvents & FD_CLOSE) { - statePtr->flags |= SOCKET_EOF; - bytesRead = 0; - break; - } + if (infoPtr->lastError) { - error = WSAGetLastError(); + mask |= TCL_READABLE; + + } else { + fd_set readFds; + struct timeval timeout; - /* - * If an RST comes, then ignore the error and report an EOF just like - * on unix. - */ + /* + * 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. + */ - if (error == WSAECONNRESET) { - statePtr->flags |= SOCKET_EOF; - bytesRead = 0; - break; - } + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) UNSELECT, (LPARAM) infoPtr); - /* - * Check for error condition or underflow in non-blocking case. - */ + FD_ZERO(&readFds); + FD_SET(infoPtr->socket, &readFds); + timeout.tv_usec = 0; + timeout.tv_sec = 0; - if ((statePtr->flags & TCP_NONBLOCKING) || (error != WSAEWOULDBLOCK)) { - TclWinConvertError(error); - *errorCodePtr = Tcl_GetErrno(); - bytesRead = -1; - break; + if (select(0, &readFds, NULL, NULL, &timeout) != 0) { + mask |= TCL_READABLE; + } else { + infoPtr->readyEvents &= ~(FD_READ); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) SELECT, (LPARAM) infoPtr); + } } + } - /* - * In the blocking case, wait until the file becomes readable or - * closed and try again. - */ + /* + * writable event + */ - if (!WaitForSocketEvent(statePtr, FD_READ|FD_CLOSE, errorCodePtr)) { - bytesRead = -1; - break; - } + if (events & FD_WRITE) { + mask |= TCL_WRITABLE; } - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM)SELECT, (LPARAM)statePtr); - - return bytesRead; + if (mask) { + Tcl_NotifyChannel(infoPtr->channel, mask); + } + return 1; } /* *---------------------------------------------------------------------- * - * TcpOutputProc -- + * TcpBlockProc -- * - * This function is called by the generic IO level to write data to a - * socket based channel. + * Sets a socket into blocking or non-blocking mode. * * Results: - * The number of bytes written or -1 on failure. + * 0 if successful, errno if there was an error. * * Side effects: - * Produces output on the socket. + * None. * *---------------------------------------------------------------------- */ static int -TcpOutputProc( - ClientData instanceData, /* Socket state. */ - const char *buf, /* The data buffer. */ - int toWrite, /* How many bytes to write? */ - int *errorCodePtr) /* Where to store error code. */ +TcpBlockProc( + ClientData instanceData, /* The socket to block/un-block. */ + int mode) /* TCL_MODE_BLOCKING or + * TCL_MODE_NONBLOCKING. */ { - TcpState *statePtr = instanceData; - int written; - DWORD error; - ThreadSpecificData *tsdPtr = 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; - } + SocketInfo *infoPtr = (SocketInfo *) instanceData; - /* - * Check if there is an async connect running. - * For blocking sockets terminate connect, otherwise do one step. - * For a non blocking socket return EWOULDBLOCK if connect not terminated - */ - - if (WaitForConnect(statePtr, errorCodePtr) != 0) { - return -1; - } - - while (1) { - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) UNSELECT, (LPARAM) statePtr); - - /* single fd operation: this proc is only called for a connected socket. */ - written = send(statePtr->sockets->fd, buf, toWrite, 0); - if (written != 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 (statePtr->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 = WSAGetLastError(); - if (error == WSAEWOULDBLOCK) { - statePtr->readyEvents &= ~(FD_WRITE); - if (statePtr->flags & TCP_NONBLOCKING) { - *errorCodePtr = EWOULDBLOCK; - written = -1; - break; - } - } else { - TclWinConvertError(error); - *errorCodePtr = Tcl_GetErrno(); - written = -1; - break; - } - - /* - * In the blocking case, wait until the file becomes writable or - * closed and try again. - */ - - if (!WaitForSocketEvent(statePtr, FD_WRITE|FD_CLOSE, errorCodePtr)) { - written = -1; - break; - } + if (mode == TCL_MODE_NONBLOCKING) { + infoPtr->flags |= SOCKET_ASYNC; + } else { + infoPtr->flags &= ~(SOCKET_ASYNC); } - - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM)SELECT, (LPARAM)statePtr); - - return written; + return 0; } /* @@ -970,7 +792,7 @@ TcpCloseProc( ClientData instanceData, /* The socket to close. */ Tcl_Interp *interp) /* Unused. */ { - TcpState *statePtr = instanceData; + SocketInfo *infoPtr = (SocketInfo *) instanceData; /* TIP #218 */ int errorCode = 0; ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); @@ -988,37 +810,24 @@ TcpCloseProc( * background. */ - while ( statePtr->sockets != NULL ) { - TcpFdList *thisfd = statePtr->sockets; - statePtr->sockets = thisfd->next; - - if (closesocket(thisfd->fd) == SOCKET_ERROR) { - TclWinConvertError((DWORD) WSAGetLastError()); - errorCode = Tcl_GetErrno(); - } - ckfree(thisfd); + if (closesocket(infoPtr->socket) == SOCKET_ERROR) { + TclWinConvertWSAError((DWORD) WSAGetLastError()); + errorCode = Tcl_GetErrno(); } } - if (statePtr->addrlist != NULL) { - freeaddrinfo(statePtr->addrlist); - } - if (statePtr->myaddrlist != NULL) { - freeaddrinfo(statePtr->myaddrlist); - } - /* * Clear an eventual tsd info list pointer. * This may be called, if an async socket connect fails or is closed * between connect and thread action callback. */ - if (tsdPtr->pendingTcpState != NULL - && tsdPtr->pendingTcpState == statePtr) { + if (tsdPtr->pendingSocketInfo != NULL + && tsdPtr->pendingSocketInfo == infoPtr) { /* get infoPtr lock, because this concerns the notifier thread */ WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - tsdPtr->pendingTcpState = NULL; + tsdPtr->pendingSocketInfo = NULL; /* Free list lock */ SetEvent(tsdPtr->socketListLock); @@ -1031,93 +840,92 @@ TcpCloseProc( * fear of damaging the list. */ - ckfree(statePtr); + ckfree((char *) infoPtr); return errorCode; } /* *---------------------------------------------------------------------- * - * TcpClose2Proc -- + * NewSocketInfo -- * - * This function is called by the generic IO level to perform the channel - * type specific part of a half-close: namely, a shutdown() on a socket. + * This function allocates and initializes a new SocketInfo structure. * * Results: - * 0 if successful, the value of errno if failed. + * Returns a newly allocated SocketInfo. * * Side effects: - * Shuts down one side of the socket. + * None, except for allocation of memory. * *---------------------------------------------------------------------- */ -static int -TcpClose2Proc( - ClientData instanceData, /* The socket to close. */ - Tcl_Interp *interp, /* For error reporting. */ - int flags) /* Flags that indicate which side to close. */ +static SocketInfo * +NewSocketInfo( + SOCKET socket) { - TcpState *statePtr = instanceData; - int errorCode = 0; - int sd; + SocketInfo *infoPtr; + /* ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); */ + + infoPtr = (SocketInfo *) ckalloc((unsigned) sizeof(SocketInfo)); + infoPtr->channel = 0; + infoPtr->socket = socket; + infoPtr->flags = 0; + infoPtr->watchEvents = 0; + infoPtr->readyEvents = 0; + infoPtr->selectEvents = 0; + infoPtr->acceptEventCount = 0; + infoPtr->acceptProc = NULL; + infoPtr->acceptProcData = NULL; + infoPtr->lastError = 0; /* - * Shutdown the OS socket handle. + * TIP #218. Removed the code inserting the new structure into the global + * list. This is now handled in the thread action callbacks, and only + * there. */ - 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)); - } - return TCL_ERROR; - } + infoPtr->nextPtr = NULL; - /* 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(statePtr->sockets->fd, sd) == SOCKET_ERROR) { - TclWinConvertError((DWORD) WSAGetLastError()); - errorCode = Tcl_GetErrno(); - } - - return errorCode; + return infoPtr; } /* *---------------------------------------------------------------------- * - * TcpSetOptionProc -- + * CreateSocket -- * - * Sets Tcp channel specific options. + * This function opens a new socket and initializes the SocketInfo + * structure. * * Results: - * None, unless an error happens. + * Returns a new SocketInfo, or NULL with an error in interp. * * Side effects: - * Changes attributes of the socket at the system level. + * None, except for allocation of memory. * *---------------------------------------------------------------------- */ -static int -TcpSetOptionProc( - ClientData instanceData, /* Socket state. */ - Tcl_Interp *interp, /* For error reporting - can be NULL. */ - const char *optionName, /* Name of the option to set. */ - const char *value) /* New value for option. */ +static SocketInfo * +CreateSocket( + Tcl_Interp *interp, /* For error reporting; can be NULL. */ + int port, /* Port number to open. */ + const 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. */ + const char *myaddr, /* Optional client-side address */ + int myport, /* Optional client-side port */ + int async) /* If nonzero, connect client socket + * asynchronously. */ { -#ifdef TCL_FEATURE_KEEPALIVE_NAGLE - TcpState *statePtr = instanceData; - SOCKET sock; -#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ + u_long flag = 1; /* Indicates nonblocking mode. */ + SOCKADDR_IN sockaddr; /* Socket address */ + SOCKADDR_IN mysockaddr; /* Socket address for client */ + SOCKET sock = INVALID_SOCKET; + SocketInfo *infoPtr=NULL; /* The returned value. */ + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) + TclThreadDataKeyGet(&dataKey); /* * Check that WinSock is initialized; do not call it if not, to prevent @@ -1126,748 +934,345 @@ TcpSetOptionProc( */ if (!SocketsEnabled()) { - if (interp) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "winsock is not initialized", -1)); - } - return TCL_ERROR; + return NULL; } -#ifdef TCL_FEATURE_KEEPALIVE_NAGLE - #error "TCL_FEATURE_KEEPALIVE_NAGLE not reviewed for whether to treat statePtr->sockets as single fd or list" - sock = statePtr->sockets->fd; - - if (!strcasecmp(optionName, "-keepalive")) { - BOOL val = FALSE; - int boolVar, rtn; - - if (Tcl_GetBoolean(interp, value, &boolVar) != TCL_OK) { - return TCL_ERROR; - } - if (boolVar) { - val = TRUE; - } - rtn = setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, - (const char *) &val, sizeof(BOOL)); - if (rtn != 0) { - TclWinConvertError(WSAGetLastError()); - if (interp) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't set socket option: %s", - Tcl_PosixError(interp))); - } - return TCL_ERROR; - } - return TCL_OK; - } else if (!strcasecmp(optionName, "-nagle")) { - BOOL val = FALSE; - int boolVar, rtn; - - if (Tcl_GetBoolean(interp, value, &boolVar) != TCL_OK) { - return TCL_ERROR; - } - if (!boolVar) { - val = TRUE; - } - rtn = setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, - (const char *) &val, sizeof(BOOL)); - if (rtn != 0) { - TclWinConvertError(WSAGetLastError()); - if (interp) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't set socket option: %s", - Tcl_PosixError(interp))); - } - return TCL_ERROR; - } - return TCL_OK; + if (!CreateSocketAddress(&sockaddr, host, port)) { + goto error; + } + if ((myaddr != NULL || myport != 0) && + !CreateSocketAddress(&mysockaddr, myaddr, myport)) { + goto error; } - return Tcl_BadChannelOption(interp, optionName, "keepalive nagle"); -#else - return Tcl_BadChannelOption(interp, optionName, ""); -#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ -} - -/* - *---------------------------------------------------------------------- - * - * 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. Sets - * Error message if needed. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -TcpGetOptionProc( - ClientData instanceData, /* Socket state. */ - Tcl_Interp *interp, /* For error reporting - can be NULL. */ - const 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. */ -{ - TcpState *statePtr = instanceData; - char host[NI_MAXHOST], port[NI_MAXSERV]; - SOCKET sock; - size_t len = 0; - int reverseDNS = 0; -#define SUPPRESS_RDNS_VAR "::tcl::unsupported::noReverseDNS" + sock = socket(AF_INET, SOCK_STREAM, 0); + if (sock == INVALID_SOCKET) { + goto error; + } /* - * 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. + * Win-NT has a misfeature that sockets are inherited in child processes + * by default. Turn off the inherit bit. */ - if (!SocketsEnabled()) { - if (interp) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "winsock is not initialized", -1)); - } - return TCL_ERROR; - } + SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); /* - * Go one step in async connect - * If any error is thrown save it as backround error to report eventually below + * Set kernel space buffering */ - WaitForConnect(statePtr, NULL); - sock = statePtr->sockets->fd; - if (optionName != NULL) { - len = strlen(optionName); - } + TclSockMinimumBuffers((void *)sock, TCP_BUFFER_SIZE); - if ((len > 1) && (optionName[1] == 'e') && - (strncmp(optionName, "-error", len) == 0)) { + 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 (bind(sock, (SOCKADDR *) &sockaddr, sizeof(SOCKADDR_IN)) + == SOCKET_ERROR) { + goto error; + } /* - * Do not return any errors if async connect is running - */ - if ( ! (statePtr->flags & TCP_ASYNC_PENDING) ) { + * 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) { + goto error; + } - if ( statePtr->flags & TCP_ASYNC_FAILED ) { + /* + * Add this socket to the global list of sockets. + */ - /* - * In case of a failed async connect, eventually report the - * connect error only once. - * Do not report the system error, as this comes again and again. - */ + infoPtr = NewSocketInfo(sock); - if ( statePtr->connectError != 0 ) { - Tcl_DStringAppend(dsPtr, - Tcl_ErrnoMsg(statePtr->connectError), -1); - statePtr->connectError = 0; - } + /* + * Set up the select mask for connection request events. + */ - } else { + infoPtr->selectEvents = FD_ACCEPT; + infoPtr->watchEvents |= FD_ACCEPT; - /* - * Report an eventual last error of the socket system - */ + /* + * Register for interest in events in the select mask. Note that this + * automatically places the socket into non-blocking mode. + */ + + ioctlsocket(sock, (long) FIONBIO, &flag); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, + (LPARAM) infoPtr); - int optlen; - int ret; - DWORD err; + } else { + /* + * Try to bind to a local port, if specified. + */ - /* - * Populater the err Variable with a possix error - */ - optlen = sizeof(int); - ret = getsockopt(sock, SOL_SOCKET, SO_ERROR, - (char *)&err, &optlen); - /* - * The error was not returned directly but should be - * taken from WSA - */ - if (ret == SOCKET_ERROR) { - err = WSAGetLastError(); - } - /* - * Return error message - */ - if (err) { - TclWinConvertError(err); - Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(Tcl_GetErrno()), -1); - } + if (myaddr != NULL || myport != 0) { + if (bind(sock, (SOCKADDR *) &mysockaddr, sizeof(SOCKADDR_IN)) + == SOCKET_ERROR) { + goto error; } } - return TCL_OK; - } - if ((len > 1) && (optionName[1] == 'c') && - (strncmp(optionName, "-connecting", len) == 0)) { + /* + * Allocate socket info structure + */ - Tcl_DStringAppend(dsPtr, - (statePtr->flags & TCP_ASYNC_PENDING) - ? "1" : "0", -1); - return TCL_OK; - } + infoPtr = NewSocketInfo(sock); - if (interp != NULL && Tcl_GetVar2(interp, SUPPRESS_RDNS_VAR, NULL, 0) != NULL) { - reverseDNS = NI_NUMERICHOST; - } + /* + * Set the socket into nonblocking mode if the connect should be done + * in the background. Activate connect notification. + */ - if ((len == 0) || ((len > 1) && (optionName[1] == 'p') && - (strncmp(optionName, "-peername", len) == 0))) { - address peername; - socklen_t size = sizeof(peername); + if (async) { + + /* get infoPtr lock */ + WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - if ( (statePtr->flags & TCP_ASYNC_PENDING) ) { /* - * In async connect output an empty string + * Buffer new infoPtr in the tsd memory as long as it is not in + * the info list. This allows the event procedure to process the + * event. + * Bugfig for 336441ed59 to not ignore notifications until the + * infoPtr is in the list.. */ - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-peername"); - Tcl_DStringAppendElement(dsPtr, ""); - } else { - return TCL_OK; - } - } else if ( getpeername(sock, (LPSOCKADDR) &(peername.sa), &size) == 0) { + + tsdPtr->pendingSocketInfo = infoPtr; + /* - * Peername fetch succeeded - output list + * Set connect mask to connect events + * This is activated by a SOCKET_SELECT message to the notifier + * thread. */ - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-peername"); - Tcl_DStringStartSublist(dsPtr); - } - getnameinfo(&(peername.sa), size, host, sizeof(host), - NULL, 0, NI_NUMERICHOST); - Tcl_DStringAppendElement(dsPtr, host); - getnameinfo(&(peername.sa), size, host, sizeof(host), - port, sizeof(port), reverseDNS | NI_NUMERICSERV); - Tcl_DStringAppendElement(dsPtr, host); - Tcl_DStringAppendElement(dsPtr, port); - if (len == 0) { - Tcl_DStringEndSublist(dsPtr); - } else { - return TCL_OK; - } - } else { + infoPtr->selectEvents |= FD_CONNECT | FD_READ | FD_WRITE | FD_CLOSE; + infoPtr->flags |= SOCKET_ASYNC_CONNECT; + /* - * 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 (such sockets have no - * peer). {Copied from unix/tclUnixChan.c} + * Free list lock */ + SetEvent(tsdPtr->socketListLock); + + /* + * Activate accept notification and put in async mode + * Bug 336441ed59: activate notification before connect + * so we do not miss a notification of a fialed connect. + */ + ioctlsocket(sock, (long) FIONBIO, &flag); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, + (LPARAM) infoPtr); - if (len) { - TclWinConvertError((DWORD) WSAGetLastError()); - if (interp) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "can't get peername: %s", - Tcl_PosixError(interp))); - } - return TCL_ERROR; - } } - } - if ((len == 0) || ((len > 1) && (optionName[1] == 's') && - (strncmp(optionName, "-sockname", len) == 0))) { - TcpFdList *fds; - address sockname; - socklen_t size; - int found = 0; + /* + * Attempt to connect to the remote socket. + */ + + if (connect(sock, (SOCKADDR *) &sockaddr, + sizeof(SOCKADDR_IN)) == SOCKET_ERROR) { + TclWinConvertWSAError((DWORD) WSAGetLastError()); + if (Tcl_GetErrno() != EWOULDBLOCK) { + goto error; + } - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-sockname"); - Tcl_DStringStartSublist(dsPtr); - } - if ( (statePtr->flags & TCP_ASYNC_PENDING ) ) { /* - * In async connect output an empty string + * The connection is progressing in the background. */ - found = 1; + } else { - for (fds = statePtr->sockets; fds != NULL; fds = fds->next) { - sock = fds->fd; - size = sizeof(sockname); - if (getsockname(sock, &(sockname.sa), &size) >= 0) { - int flags = reverseDNS; - found = 1; - getnameinfo(&sockname.sa, size, host, sizeof(host), - NULL, 0, NI_NUMERICHOST); - Tcl_DStringAppendElement(dsPtr, host); + /* + * Set up the select mask for read/write events. If the connect + * attempt has not completed, include connect events. + */ - /* - * We don't want to resolve INADDR_ANY and sin6addr_any; they - * can sometimes cause problems (and never have a name). - */ - flags |= NI_NUMERICSERV; - if (sockname.sa.sa_family == AF_INET) { - if (sockname.sa4.sin_addr.s_addr == INADDR_ANY) { - flags |= NI_NUMERICHOST; - } - } else if (sockname.sa.sa_family == AF_INET6) { - if ((IN6_ARE_ADDR_EQUAL(&sockname.sa6.sin6_addr, - &in6addr_any)) || - (IN6_IS_ADDR_V4MAPPED(&sockname.sa6.sin6_addr) - && sockname.sa6.sin6_addr.s6_addr[12] == 0 - && sockname.sa6.sin6_addr.s6_addr[13] == 0 - && sockname.sa6.sin6_addr.s6_addr[14] == 0 - && sockname.sa6.sin6_addr.s6_addr[15] == 0)) { - flags |= NI_NUMERICHOST; - } - } - getnameinfo(&sockname.sa, size, host, sizeof(host), - port, sizeof(port), flags); - Tcl_DStringAppendElement(dsPtr, host); - Tcl_DStringAppendElement(dsPtr, port); - } - } - } - if (found) { - if (len) { - return TCL_OK; - } - Tcl_DStringEndSublist(dsPtr); - } else { - if (interp) { - TclWinConvertError((DWORD) WSAGetLastError()); - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "can't get sockname: %s", Tcl_PosixError(interp))); - } - return TCL_ERROR; - } - } + infoPtr->selectEvents = FD_READ | FD_WRITE | FD_CLOSE; -#ifdef TCL_FEATURE_KEEPALIVE_NAGLE - if (len == 0 || !strncmp(optionName, "-keepalive", len)) { - int optlen; - BOOL opt = FALSE; + /* + * Register for interest in events in the select mask. Note that this + * automatically places the socket into non-blocking mode. + */ - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-keepalive"); - } - optlen = sizeof(BOOL); - getsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (char *)&opt, &optlen); - if (opt) { - Tcl_DStringAppendElement(dsPtr, "1"); - } else { - Tcl_DStringAppendElement(dsPtr, "0"); - } - if (len > 0) { - return TCL_OK; + ioctlsocket(sock, (long) FIONBIO, &flag); + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, + (LPARAM) infoPtr); } } - if (len == 0 || !strncmp(optionName, "-nagle", len)) { - int optlen; - BOOL opt = FALSE; + return infoPtr; - if (len == 0) { - Tcl_DStringAppendElement(dsPtr, "-nagle"); - } - optlen = sizeof(BOOL); - getsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&opt, &optlen); - if (opt) { - Tcl_DStringAppendElement(dsPtr, "0"); - } else { - Tcl_DStringAppendElement(dsPtr, "1"); - } - if (len > 0) { - return TCL_OK; - } + error: + TclWinConvertWSAError((DWORD) WSAGetLastError()); + if (interp != NULL) { + Tcl_AppendResult(interp, "couldn't open socket: ", + Tcl_PosixError(interp), NULL); } -#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ - - if (len > 0) { -#ifdef TCL_FEATURE_KEEPALIVE_NAGLE - return Tcl_BadChannelOption(interp, optionName, - "connecting peername sockname keepalive nagle"); -#else - return Tcl_BadChannelOption(interp, optionName, "connecting peername sockname"); -#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ + if (infoPtr != NULL) { + /* + * Free the allocated socket info structure and close the socket + */ + TcpCloseProc(infoPtr, interp); + } else if (sock != INVALID_SOCKET) { + /* + * No socket structure jet - just close + */ + closesocket(sock); } - - return TCL_OK; + return NULL; } /* *---------------------------------------------------------------------- * - * TcpWatchProc -- + * CreateSocketAddress -- * - * Informs the channel driver of the events that the generic channel code - * wishes to receive on this socket. + * This function initializes a sockaddr structure for a host and port. * * Results: - * None. + * 1 if the host was valid, 0 if the host could not be converted to an IP + * address. * * Side effects: - * May cause the notifier to poll if any of the specified conditions are - * already true. + * Fills in the *sockaddrPtr structure. * *---------------------------------------------------------------------- */ -static void -TcpWatchProc( - ClientData instanceData, /* The socket state. */ - int mask) /* Events of interest; an OR-ed combination of - * TCL_READABLE, TCL_WRITABLE and - * TCL_EXCEPTION. */ +static int +CreateSocketAddress( + LPSOCKADDR_IN sockaddrPtr, /* Socket address */ + const char *host, /* Host. NULL implies INADDR_ANY */ + int port) /* Port number */ { - TcpState *statePtr = instanceData; + struct hostent *hostent; /* Host database entry */ + struct in_addr addr; /* For 64/32 bit madness */ /* - * Update the watch events mask. Only if the socket is not a server - * socket. [Bug 557878] + * 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 (!statePtr->acceptProc) { - statePtr->watchEvents = 0; - if (mask & TCL_READABLE) { - statePtr->watchEvents |= (FD_READ|FD_CLOSE); - } - if (mask & TCL_WRITABLE) { - statePtr->watchEvents |= (FD_WRITE|FD_CLOSE); - } - - /* - * If there are any conditions already set, then tell the notifier to - * poll rather than block. - */ - - if (statePtr->readyEvents & statePtr->watchEvents) { - Tcl_Time blockTime = { 0, 0 }; + if (!SocketsEnabled()) { + Tcl_SetErrno(EFAULT); + return 0; + } - Tcl_SetMaxBlockTime(&blockTime); + ZeroMemory(sockaddrPtr, sizeof(SOCKADDR_IN)); + sockaddrPtr->sin_family = AF_INET; + sockaddrPtr->sin_port = htons((unsigned 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. */ + } } } -} - -/* - *---------------------------------------------------------------------- - * - * TcpGetHandleProc -- - * - * Called from Tcl_GetChannelHandle to retrieve OS handles from inside a - * TCP socket based channel. - * - * Results: - * Returns TCL_OK with the fd in handlePtr, or TCL_ERROR if there is no - * handle for the specified direction. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - /* ARGSUSED */ -static int -TcpGetHandleProc( - ClientData instanceData, /* The socket state. */ - int direction, /* Not used. */ - ClientData *handlePtr) /* Where to store the handle. */ -{ - TcpState *statePtr = instanceData; + /* + * 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? + */ - *handlePtr = INT2PTR(statePtr->sockets->fd); - return TCL_OK; + sockaddrPtr->sin_addr.s_addr = addr.s_addr; + return 1; /* Success. */ } - - /* *---------------------------------------------------------------------- * - * TcpConnect -- - * - * This function opens a new socket in client mode. + * WaitForSocketEvent -- * - * This might be called in 3 circumstances: - * - By a regular socket command - * - By the event handler to continue an asynchroneous connect - * - By a blocking socket function (gets/puts) to terminate the - * connect synchroneously + * Waits until one of the specified events occurs on a socket. * * Results: - * TCL_OK, if the socket was successfully connected or an asynchronous - * connection is in progress. If an error occurs, TCL_ERROR is returned - * and an error message is left in interp. + * Returns 1 on success or 0 on failure, with an error code in + * errorCodePtr. * * Side effects: - * Opens a socket. - * - * Remarks: - * A single host name may resolve to more than one IP address, e.g. for - * an IPv4/IPv6 dual stack host. For handling asyncronously connecting - * sockets in the background for such hosts, this function can act as a - * coroutine. On the first call, it sets up the control variables for the - * two nested loops over the local and remote addresses. Once the first - * connection attempt is in progress, it sets up itself as a writable - * event handler for that socket, and returns. When the callback occurs, - * control is transferred to the "reenter" label, right after the initial - * return and the loops resume as if they had never been interrupted. - * For syncronously connecting sockets, the loops work the usual way. + * Processes socket events off the system queue. * *---------------------------------------------------------------------- */ static int -TcpConnect( - Tcl_Interp *interp, /* For error reporting; can be NULL. */ - TcpState *statePtr) +WaitForSocketEvent( + SocketInfo *infoPtr, /* Information about this socket. */ + int events, /* Events to look for. */ + int *errorCodePtr) /* Where to store errors? */ { - DWORD error; - /* - * We are started with async connect and the connect notification - * was not jet received - */ - int async_connect = statePtr->flags & TCP_ASYNC_CONNECT; - /* We were called by the event procedure and continue our loop */ - int async_callback = statePtr->flags & TCP_ASYNC_PENDING; - ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); - - if (async_callback) { - goto reenter; - } - - for (statePtr->addr = statePtr->addrlist; statePtr->addr != NULL; - statePtr->addr = statePtr->addr->ai_next) { - - for (statePtr->myaddr = statePtr->myaddrlist; statePtr->myaddr != NULL; - statePtr->myaddr = statePtr->myaddr->ai_next) { - - /* - * No need to try combinations of local and remote addresses - * of different families. - */ - - if (statePtr->myaddr->ai_family != statePtr->addr->ai_family) { - continue; - } - - /* - * Close the socket if it is still open from the last unsuccessful - * iteration. - */ - if (statePtr->sockets->fd != INVALID_SOCKET) { - closesocket(statePtr->sockets->fd); - } - - /* get statePtr lock */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - - /* - * Reset last error from last try - */ - statePtr->notifierConnectError = 0; - Tcl_SetErrno(0); - - statePtr->sockets->fd = socket(statePtr->myaddr->ai_family, SOCK_STREAM, 0); - - /* Free list lock */ - SetEvent(tsdPtr->socketListLock); - - /* continue on socket creation error */ - if (statePtr->sockets->fd == INVALID_SOCKET) { - TclWinConvertError((DWORD) WSAGetLastError()); - continue; - } - - /* - * Win-NT has a misfeature that sockets are inherited in child - * processes by default. Turn off the inherit bit. - */ - - SetHandleInformation((HANDLE) statePtr->sockets->fd, HANDLE_FLAG_INHERIT, 0); - - /* - * Set kernel space buffering - */ - - TclSockMinimumBuffers((void *) statePtr->sockets->fd, TCP_BUFFER_SIZE); - - /* - * Try to bind to a local port. - */ - - if (bind(statePtr->sockets->fd, statePtr->myaddr->ai_addr, - statePtr->myaddr->ai_addrlen) == SOCKET_ERROR) { - TclWinConvertError((DWORD) WSAGetLastError()); - continue; - } - /* - * For asyncroneous connect set the socket in nonblocking mode - * and activate connect notification - */ - if (async_connect) { - TcpState *statePtr2; - int in_socket_list = 0; - /* get statePtr lock */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - - /* - * Bugfig for 336441ed59 to not ignore notifications until the - * infoPtr is in the list. - * Check if my statePtr is already in the tsdPtr->socketList - * It is set after this call by TcpThreadActionProc and is set - * on a second round. - * - * If not, we buffer my statePtr in the tsd memory so it is not - * lost by the event procedure - */ - - for (statePtr2 = tsdPtr->socketList; statePtr2 != NULL; - statePtr2 = statePtr2->nextPtr) { - if (statePtr2 == statePtr) { - in_socket_list = 1; - break; - } - } - if (!in_socket_list) { - tsdPtr->pendingTcpState = statePtr; - } - /* - * Set connect mask to connect events - * This is activated by a SOCKET_SELECT message to the notifier - * thread. - */ - statePtr->selectEvents |= FD_CONNECT; - - /* - * Free list lock - */ - SetEvent(tsdPtr->socketListLock); - - /* activate accept notification */ - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, - (LPARAM) statePtr); - } - - /* - * Attempt to connect to the remote socket. - */ - - connect(statePtr->sockets->fd, statePtr->addr->ai_addr, - statePtr->addr->ai_addrlen); - - error = WSAGetLastError(); - TclWinConvertError(error); - - if (async_connect && error == WSAEWOULDBLOCK) { - /* - * Asynchroneous connect - */ - - /* - * Remember that we jump back behind this next round - */ - statePtr->flags |= TCP_ASYNC_PENDING; - return TCL_OK; - - reenter: - /* - * Re-entry point for async connect after connect event or - * blocking operation - * - * Clear the reenter flag - */ - statePtr->flags &= ~(TCP_ASYNC_PENDING); - /* get statePtr lock */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - /* Get signaled connect error */ - TclWinConvertError((DWORD) statePtr->notifierConnectError); - /* Clear eventual connect flag */ - statePtr->selectEvents &= ~(FD_CONNECT); - /* Free list lock */ - SetEvent(tsdPtr->socketListLock); - } - - /* - * Clear the tsd socket list pointer if we did not wait for - * the FD_CONNECT asyncroneously - */ - tsdPtr->pendingTcpState = NULL; - - if (Tcl_GetErrno() == 0) { - goto out; - } - } - } + int result = 1; + int oldMode; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) + TclThreadDataKeyGet(&dataKey); -out: /* - * Socket connected or connection failed + * Be sure to disable event servicing so we are truly modal. */ + oldMode = Tcl_SetServiceMode(TCL_SERVICE_NONE); + /* - * Async connect terminated + * Reset WSAAsyncSelect so we have a fresh set of events pending. + * Don't do that if we are waiting for a connect as we may miss + * a connect (bug 336441ed59). */ - CLEAR_BITS(statePtr->flags, TCP_ASYNC_CONNECT); - - if ( Tcl_GetErrno() == 0 ) { - /* - * Succesfully connected - */ - /* - * Set up the select mask for read/write events. - */ - statePtr->selectEvents = FD_READ | FD_WRITE | FD_CLOSE; + if ( 0 == (events & FD_CONNECT) ) { + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) UNSELECT, + (LPARAM) infoPtr); + + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, + (LPARAM) infoPtr); + } - /* - * Register for interest in events in the select mask. Note that this - * automatically places the socket into non-blocking mode. - */ + while (1) { + 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; + } - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, - (LPARAM) statePtr); - } else { /* - * Connect failed + * Wait until something happens. */ - /* - * For async connect schedule a writable event to report the fail. - */ - if (async_callback) { - /* - * Set up the select mask for read/write events. - */ - statePtr->selectEvents = FD_WRITE|FD_READ; - /* get statePtr lock */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - /* Signal ready readable and writable events */ - statePtr->readyEvents |= FD_WRITE | FD_READ; - /* Flag error to event routine */ - statePtr->flags |= TCP_ASYNC_FAILED; - /* Save connect error to be reported by 'fconfigure -error' */ - statePtr->connectError = Tcl_GetErrno(); - /* Free list lock */ - SetEvent(tsdPtr->socketListLock); - } - /* - * Error message on syncroneous connect - */ - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't open socket: %s", Tcl_PosixError(interp))); - } - return TCL_ERROR; + WaitForSingleObject(tsdPtr->readyEvent, INFINITE); } - return TCL_OK; + + (void) Tcl_SetServiceMode(oldMode); + return result; } /* @@ -1894,75 +1299,40 @@ Tcl_OpenTcpClient( const char *host, /* Host on which to open port. */ const char *myaddr, /* Client-side address */ int myport, /* Client-side port */ - int async) /* If nonzero, attempt to do an asynchronous - * connect. Otherwise we do a blocking - * connect. */ + int async) /* If nonzero, should connect client socket + * asynchronously. */ { - TcpState *statePtr; - const char *errorMsg = NULL; - struct addrinfo *addrlist = NULL, *myaddrlist = NULL; - char channelName[SOCK_CHAN_LENGTH]; + SocketInfo *infoPtr; + char channelName[16 + TCL_INTEGER_SPACE]; if (TclpHasSockets(interp) != TCL_OK) { return NULL; } /* - * 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. + * Create a new client socket and wrap it in a channel. */ - if (!SocketsEnabled()) { + infoPtr = CreateSocket(interp, port, host, 0, myaddr, myport, async); + if (infoPtr == NULL) { return NULL; } - /* - * Do the name lookups for the local and remote addresses. - */ - - if (!TclCreateSocketAddress(interp, &addrlist, host, port, 0, &errorMsg) - || !TclCreateSocketAddress(interp, &myaddrlist, myaddr, myport, 1, - &errorMsg)) { - if (addrlist != NULL) { - freeaddrinfo(addrlist); - } - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't open socket: %s", errorMsg)); - } - return NULL; - } - - statePtr = NewSocketInfo(INVALID_SOCKET); - statePtr->addrlist = addrlist; - statePtr->myaddrlist = myaddrlist; - if (async) { - statePtr->flags |= TCP_ASYNC_CONNECT; - } + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t)infoPtr->socket); - /* - * Create a new client socket and wrap it in a channel. - */ - if (TcpConnect(interp, statePtr) != TCL_OK) { - TcpCloseProc(statePtr, NULL); - return NULL; + 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; } - - sprintf(channelName, SOCK_TEMPLATE, statePtr); - - statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - statePtr, (TCL_READABLE | TCL_WRITABLE)); - if (TCL_ERROR == Tcl_SetChannelOption(NULL, statePtr->channel, - "-translation", "auto crlf")) { - Tcl_Close(NULL, statePtr->channel); - return NULL; - } else if (TCL_ERROR == Tcl_SetChannelOption(NULL, statePtr->channel, - "-eofchar", "")) { - Tcl_Close(NULL, statePtr->channel); - return NULL; + if (Tcl_SetChannelOption(NULL, infoPtr->channel, "-eofchar", "") + == TCL_ERROR) { + Tcl_Close((Tcl_Interp *) NULL, infoPtr->channel); + return (Tcl_Channel) NULL; } - return statePtr->channel; + return infoPtr->channel; } /* @@ -1978,6 +1348,8 @@ Tcl_OpenTcpClient( * Side effects: * None. * + * NOTE: Code contributed by Mark Diekhans (markd@grizzly.com) + * *---------------------------------------------------------------------- */ @@ -1985,15 +1357,15 @@ Tcl_Channel Tcl_MakeTcpClientChannel( ClientData sock) /* The socket to wrap up into a channel. */ { - TcpState *statePtr; - char channelName[SOCK_CHAN_LENGTH]; + SocketInfo *infoPtr; + char channelName[16 + TCL_INTEGER_SPACE]; ThreadSpecificData *tsdPtr; if (TclpHasSockets(NULL) != TCL_OK) { return NULL; } - tsdPtr = TclThreadDataKeyGet(&dataKey); + tsdPtr = (ThreadSpecificData *)TclThreadDataKeyGet(&dataKey); /* * Set kernel space buffering and non-blocking. @@ -2001,32 +1373,33 @@ Tcl_MakeTcpClientChannel( TclSockMinimumBuffers(sock, TCP_BUFFER_SIZE); - statePtr = NewSocketInfo((SOCKET) sock); + infoPtr = NewSocketInfo((SOCKET) sock); /* * Start watching for read/write events on the socket. */ - statePtr->selectEvents = FD_READ | FD_CLOSE | FD_WRITE; - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM)SELECT, (LPARAM)statePtr); + infoPtr->selectEvents = FD_READ | FD_CLOSE | FD_WRITE; + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) SELECT, (LPARAM) infoPtr); - sprintf(channelName, SOCK_TEMPLATE, statePtr); - statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - statePtr, (TCL_READABLE | TCL_WRITABLE)); - Tcl_SetChannelOption(NULL, statePtr->channel, "-translation", "auto crlf"); - return statePtr->channel; + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t)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_OpenTcpServerEx -- + * Tcl_OpenTcpServer -- * * Opens a TCP server socket and creates a channel around it. * * Results: - * The channel or NULL if failed. If an error occurred, an error message - * is left in the interp's result if interp is not NULL. + * 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. @@ -2035,223 +1408,118 @@ Tcl_MakeTcpClientChannel( */ Tcl_Channel -Tcl_OpenTcpServerEx( +Tcl_OpenTcpServer( Tcl_Interp *interp, /* For error reporting - may be NULL. */ - const char *service, /* Port number to open. */ - const char *myHost, /* Name of local host. */ - unsigned int flags, /* Flags. */ + int port, /* Port number to open. */ + const char *host, /* Name of local host. */ Tcl_TcpAcceptProc *acceptProc, /* Callback for accepting connections from new * clients. */ ClientData acceptProcData) /* Data for the callback. */ { - SOCKET sock = INVALID_SOCKET; - unsigned short chosenport = 0; - struct addrinfo *addrlist = NULL; - struct addrinfo *addrPtr; /* Socket address to listen on. */ - TcpState *statePtr = NULL; /* The returned value. */ - char channelName[SOCK_CHAN_LENGTH]; - u_long flag = 1; /* Indicates nonblocking mode. */ - const char *errorMsg = NULL; - int optvalue, port; + SocketInfo *infoPtr; + char channelName[16 + TCL_INTEGER_SPACE]; if (TclpHasSockets(interp) != TCL_OK) { return NULL; } /* - * 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. + * Create a new client socket and wrap it in a channel. */ - if (!SocketsEnabled()) { + infoPtr = CreateSocket(interp, port, host, 1, NULL, 0, 0); + if (infoPtr == NULL) { return NULL; } - /* - * Construct the addresses for each end of the socket. - */ - - if (TclSockGetPort(interp, service, "tcp", &port) != TCL_OK) { - errorMsg = "invalid port number"; - goto error; - } - - if (!TclCreateSocketAddress(interp, &addrlist, myHost, port, 1, &errorMsg)) { - goto error; - } - - for (addrPtr = addrlist; addrPtr != NULL; addrPtr = addrPtr->ai_next) { - sock = socket(addrPtr->ai_family, addrPtr->ai_socktype, - addrPtr->ai_protocol); - if (sock == INVALID_SOCKET) { - TclWinConvertError((DWORD) WSAGetLastError()); - continue; - } - - /* - * 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((void *)sock, TCP_BUFFER_SIZE); - - /* - * Make sure we use the same port when opening two server sockets - * for IPv4 and IPv6. - * - * 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); - } - - /* - * The SO_REUSEADDR option on Windows behaves like SO_REUSEPORT on unix - * systems. - */ - if (flags & TCL_TCPSERVER_REUSEPORT) { - optvalue = 1; - (void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, - (char *) &optvalue, sizeof(optvalue)); - } - - /* - * Bind to the specified port. - * - * 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 (bind(sock, addrPtr->ai_addr, addrPtr->ai_addrlen) - == 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). - */ - - if (listen(sock, SOMAXCONN) == SOCKET_ERROR) { - TclWinConvertError((DWORD) WSAGetLastError()); - closesocket(sock); - continue; - } - - if (statePtr == NULL) { - /* - * Add this socket to the global list of sockets. - */ - statePtr = NewSocketInfo(sock); - } else { - AddSocketInfoFd( statePtr, sock ); - } - } - -error: - if (addrlist != NULL) { - freeaddrinfo(addrlist); - } - - if (statePtr != NULL) { - ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); + infoPtr->acceptProc = acceptProc; + infoPtr->acceptProcData = acceptProcData; - statePtr->acceptProc = acceptProc; - statePtr->acceptProcData = acceptProcData; - sprintf(channelName, SOCK_TEMPLATE, statePtr); - statePtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - statePtr, 0); - /* - * Set up the select mask for connection request events. - */ - - statePtr->selectEvents = FD_ACCEPT; - - /* - * Register for interest in events in the select mask. Note that this - * automatically places the socket into non-blocking mode. - */ + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t)infoPtr->socket); - ioctlsocket(sock, (long) FIONBIO, &flag); - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, - (LPARAM) statePtr); - if (Tcl_SetChannelOption(interp, statePtr->channel, "-eofchar", "") + infoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, + (ClientData) infoPtr, 0); + if (Tcl_SetChannelOption(interp, infoPtr->channel, "-eofchar", "") == TCL_ERROR) { - Tcl_Close(NULL, statePtr->channel); - return NULL; - } - return statePtr->channel; - } - - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't open socket: %s", - (errorMsg ? errorMsg : Tcl_PosixError(interp)))); + Tcl_Close((Tcl_Interp *) NULL, infoPtr->channel); + return (Tcl_Channel) NULL; } - if (sock != INVALID_SOCKET) { - closesocket(sock); - } - return NULL; + return infoPtr->channel; } /* *---------------------------------------------------------------------- * * TcpAccept -- - * Accept a TCP socket connection. This is called by the event loop. + * + * Accept a TCP socket connection. This is called by SocketEventProc and + * it in turns calls the registered accept function. * * Results: * None. * * Side effects: - * Creates a new connection socket. Calls the registered callback for the - * connection acceptance mechanism. + * Invokes the accept proc which may invoke arbitrary Tcl code. * *---------------------------------------------------------------------- */ - /* ARGSUSED */ static void TcpAccept( - TcpFdList *fds, /* Server socket that accepted newSocket. */ - SOCKET newSocket, /* Newly accepted socket. */ - address addr) /* Address of new socket. */ + SocketInfo *infoPtr) /* Socket to accept. */ { - TcpState *newInfoPtr; - TcpState *statePtr = fds->statePtr; - int len = sizeof(addr); - char channelName[SOCK_CHAN_LENGTH]; - char host[NI_MAXHOST], port[NI_MAXSERV]; - ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); + SOCKET newSocket; + SocketInfo *newInfoPtr; + SOCKADDR_IN addr; + int len; + char channelName[16 + TCL_INTEGER_SPACE]; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) + TclThreadDataKeyGet(&dataKey); + + /* + * Accept the incoming connection request. + */ + + len = sizeof(SOCKADDR_IN); + + newSocket = accept(infoPtr->socket, (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 @@ -2261,7 +1529,7 @@ TcpAccept( SetHandleInformation((HANDLE) newSocket, HANDLE_FLAG_INHERIT, 0); /* - * Add this socket to the global list of sockets. + * Allocate socket info structure */ newInfoPtr = NewSocketInfo(newSocket); @@ -2271,20 +1539,20 @@ 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_TEMPLATE, newInfoPtr); + sprintf(channelName, "sock%" TCL_I_MODIFIER "u", (size_t)newInfoPtr->socket); newInfoPtr->channel = Tcl_CreateChannel(&tcpChannelType, channelName, - newInfoPtr, (TCL_READABLE | TCL_WRITABLE)); + (ClientData) newInfoPtr, (TCL_READABLE | TCL_WRITABLE)); if (Tcl_SetChannelOption(NULL, newInfoPtr->channel, "-translation", "auto crlf") == TCL_ERROR) { - Tcl_Close(NULL, newInfoPtr->channel); + Tcl_Close((Tcl_Interp *) NULL, newInfoPtr->channel); return; } if (Tcl_SetChannelOption(NULL, newInfoPtr->channel, "-eofchar", "") == TCL_ERROR) { - Tcl_Close(NULL, newInfoPtr->channel); + Tcl_Close((Tcl_Interp *) NULL, newInfoPtr->channel); return; } @@ -2292,683 +1560,647 @@ TcpAccept( * Invoke the accept callback function. */ - if (statePtr->acceptProc != NULL) { - getnameinfo(&(addr.sa), len, host, sizeof(host), port, sizeof(port), - NI_NUMERICHOST|NI_NUMERICSERV); - statePtr->acceptProc(statePtr->acceptProcData, newInfoPtr->channel, - host, atoi(port)); + if (infoPtr->acceptProc != NULL) { + (infoPtr->acceptProc) (infoPtr->acceptProcData, newInfoPtr->channel, + inet_ntoa(addr.sin_addr), ntohs(addr.sin_port)); } } /* *---------------------------------------------------------------------- * - * InitSockets -- - * - * Registers the event window for the socket notifier code. + * TcpInputProc -- * - * Assumes socketMutex is held. + * This function is called by the generic IO level to read data from a + * socket based channel. * * Results: - * None. + * The number of bytes read or -1 on error. * * Side effects: - * Register a new window class and creates a - * window for use in asynchronous socket notification. + * Consumes input from the socket. * *---------------------------------------------------------------------- */ -static void -InitSockets(void) +static int +TcpInputProc( + 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. */ { - DWORD id; - ThreadSpecificData *tsdPtr = TclThreadDataKeyGet(&dataKey); - - if (!initialized) { - initialized = 1; - TclCreateLateExitHandler(SocketExitHandler, NULL); + SocketInfo *infoPtr = (SocketInfo *) instanceData; + int bytesRead; + DWORD error; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) + TclThreadDataKeyGet(&dataKey); - /* - * 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. - */ + *errorCodePtr = 0; - windowClass.style = 0; - windowClass.cbClsExtra = 0; - windowClass.cbWndExtra = 0; - windowClass.hInstance = TclWinGetTclInstance(); - windowClass.hbrBackground = NULL; - windowClass.lpszMenuName = NULL; - windowClass.lpszClassName = className; - windowClass.lpfnWndProc = SocketProc; - windowClass.hIcon = NULL; - windowClass.hCursor = NULL; + /* + * 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 (!RegisterClass(&windowClass)) { - TclWinConvertError(GetLastError()); - goto initFailure; - } + if (!SocketsEnabled()) { + *errorCodePtr = EFAULT; + return -1; } /* - * Check for per-thread initialization. + * First check to see if EOF was already detected, to prevent calling the + * socket stack after the first time EOF is detected. */ - if (tsdPtr != NULL) { - return; + if (infoPtr->flags & SOCKET_EOF) { + return 0; } /* - * 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. + * Check to see if the socket is connected before trying to read. */ - tsdPtr = TCL_TSD_INIT(&dataKey); - tsdPtr->pendingTcpState = NULL; - 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 ((infoPtr->flags & SOCKET_ASYNC_CONNECT) + && !WaitForSocketEvent(infoPtr, FD_CONNECT, errorCodePtr)) { + return -1; } - SetThreadPriority(tsdPtr->socketThread, THREAD_PRIORITY_HIGHEST); - /* - * Wait for the thread to signal when the window has been created and if - * it is ready to go. + * 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. */ - WaitForSingleObject(tsdPtr->readyEvent, INFINITE); + while (1) { + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) UNSELECT, (LPARAM) infoPtr); + bytesRead = recv(infoPtr->socket, buf, toRead, 0); + infoPtr->readyEvents &= ~(FD_READ); - if (tsdPtr->hwnd == NULL) { - goto initFailure; /* Trouble creating the window. */ + /* + * 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; + } + + error = WSAGetLastError(); + + /* + * If an RST comes, then ignore the error and report an EOF just like + * on unix. + */ + + if (error == WSAECONNRESET) { + infoPtr->flags |= SOCKET_EOF; + bytesRead = 0; + break; + } + + /* + * Check for error condition or underflow in non-blocking case. + */ + + 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; + } } - Tcl_CreateEventSource(SocketSetupProc, SocketCheckProc, NULL); - return; + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) SELECT, (LPARAM) infoPtr); - initFailure: - TclpFinalizeSockets(); - initialized = -1; - return; + return bytesRead; } /* *---------------------------------------------------------------------- * - * SocketsEnabled -- - * - * Check that the WinSock was successfully initialized. + * TcpOutputProc -- * - * Warning: - * This check was useful in times of Windows98 where WinSock may - * not be available. This is not the case any more. - * This function may be removed with TCL 9.0 + * This function is called by the generic IO level to write data to a + * socket based channel. * * Results: - * 1 if it is. + * The number of bytes written or -1 on failure. * * Side effects: - * None. + * Produces output on the socket. * *---------------------------------------------------------------------- */ - /* ARGSUSED */ static int -SocketsEnabled(void) +TcpOutputProc( + ClientData instanceData, /* The socket state. */ + const char *buf, /* Where to get data. */ + int toWrite, /* Maximum number of bytes to write. */ + int *errorCodePtr) /* Where to store error codes. */ { - int enabled; + SocketInfo *infoPtr = (SocketInfo *) instanceData; + int bytesWritten; + DWORD error; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *) + TclThreadDataKeyGet(&dataKey); - Tcl_MutexLock(&socketMutex); - enabled = (initialized == 1); - Tcl_MutexUnlock(&socketMutex); - return enabled; -} + *errorCodePtr = 0; - -/* - *---------------------------------------------------------------------- - * - * SocketExitHandler -- - * - * Callback invoked during exit clean up to delete the socket - * communication window. - * - * Results: - * None. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ + /* + * 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. + */ - /* ARGSUSED */ -static void -SocketExitHandler( - ClientData clientData) /* Not used. */ -{ - Tcl_MutexLock(&socketMutex); + if (!SocketsEnabled()) { + *errorCodePtr = EFAULT; + return -1; + } /* - * Make sure the socket event handling window is cleaned-up for, at - * most, this thread. + * Check to see if the socket is connected before trying to write. */ - TclpFinalizeSockets(); - UnregisterClass(className, TclWinGetTclInstance()); - initialized = 0; - Tcl_MutexUnlock(&socketMutex); -} - -/* - *---------------------------------------------------------------------- - * - * SocketSetupProc -- - * - * This function is invoked before Tcl_DoOneEvent blocks waiting for an - * event. - * - * Results: - * None. - * - * Side effects: - * Adjusts the block time if needed. - * - *---------------------------------------------------------------------- - */ + if ((infoPtr->flags & SOCKET_ASYNC_CONNECT) + && !WaitForSocketEvent(infoPtr, FD_CONNECT, errorCodePtr)) { + return -1; + } -void -SocketSetupProc( - ClientData data, /* Not used. */ - int flags) /* Event flags as passed to Tcl_DoOneEvent. */ -{ - TcpState *statePtr; - Tcl_Time blockTime = { 0, 0 }; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); + while (1) { + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) UNSELECT, (LPARAM) infoPtr); - if (!(flags & TCL_FILE_EVENTS)) { - return; - } + bytesWritten = 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. + */ - /* - * Check to see if there is a ready socket. If so, poll. - */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if (statePtr->readyEvents & - (statePtr->watchEvents | FD_CONNECT | FD_ACCEPT) - ) { - Tcl_SetMaxBlockTime(&blockTime); + 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 = 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; } } - SetEvent(tsdPtr->socketListLock); + + SendMessage(tsdPtr->hwnd, SOCKET_SELECT, + (WPARAM) SELECT, (LPARAM) infoPtr); + + return bytesWritten; } /* *---------------------------------------------------------------------- * - * SocketCheckProc -- + * TcpSetOptionProc -- * - * This function is called by Tcl_DoOneEvent to check the socket event - * source for events. + * Sets Tcp channel specific options. * * Results: - * None. + * None, unless an error happens. * * Side effects: - * May queue an event. + * Changes attributes of the socket at the system level. * *---------------------------------------------------------------------- */ -static void -SocketCheckProc( - ClientData data, /* Not used. */ - int flags) /* Event flags as passed to Tcl_DoOneEvent. */ +static int +TcpSetOptionProc( + ClientData instanceData, /* Socket state. */ + Tcl_Interp *interp, /* For error reporting - can be NULL. */ + const char *optionName, /* Name of the option to set. */ + const char *value) /* New value for option. */ { - TcpState *statePtr; - SocketEvent *evPtr; - ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey); - - if (!(flags & TCL_FILE_EVENTS)) { - return; - } +#ifdef TCL_FEATURE_KEEPALIVE_NAGLE + SocketInfo *infoPtr; + SOCKET sock; +#endif /* - * Queue events for any ready sockets that don't already have events - * queued (caused by persistent states that won't generate WinSock - * events). + * 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. */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if ((statePtr->readyEvents & - (statePtr->watchEvents | FD_CONNECT | FD_ACCEPT)) - && !(statePtr->flags & SOCKET_PENDING) - ) { - statePtr->flags |= SOCKET_PENDING; - evPtr = ckalloc(sizeof(SocketEvent)); - evPtr->header.proc = SocketEventProc; - evPtr->socket = statePtr->sockets->fd; - Tcl_QueueEvent((Tcl_Event *) evPtr, TCL_QUEUE_TAIL); + if (!SocketsEnabled()) { + if (interp) { + Tcl_AppendResult(interp, "winsock is not initialized", NULL); } + return TCL_ERROR; } - SetEvent(tsdPtr->socketListLock); + +#ifdef TCL_FEATURE_KEEPALIVE_NAGLE + infoPtr = (SocketInfo *) instanceData; + sock = infoPtr->socket; + + if (!strcasecmp(optionName, "-keepalive")) { + BOOL val = FALSE; + int boolVar, rtn; + + if (Tcl_GetBoolean(interp, value, &boolVar) != TCL_OK) { + return TCL_ERROR; + } + if (boolVar) { + val = TRUE; + } + rtn = setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, + (const char *) &val, sizeof(BOOL)); + if (rtn != 0) { + TclWinConvertWSAError(WSAGetLastError()); + if (interp) { + Tcl_AppendResult(interp, "couldn't set socket option: ", + Tcl_PosixError(interp), NULL); + } + return TCL_ERROR; + } + return TCL_OK; + } else if (!strcasecmp(optionName, "-nagle")) { + BOOL val = FALSE; + int boolVar, rtn; + + if (Tcl_GetBoolean(interp, value, &boolVar) != TCL_OK) { + return TCL_ERROR; + } + if (!boolVar) { + val = TRUE; + } + rtn = setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, + (const char *) &val, sizeof(BOOL)); + if (rtn != 0) { + TclWinConvertWSAError(WSAGetLastError()); + if (interp) { + Tcl_AppendResult(interp, "couldn't set socket option: ", + Tcl_PosixError(interp), NULL); + } + return TCL_ERROR; + } + return TCL_OK; + } + + return Tcl_BadChannelOption(interp, optionName, "keepalive nagle"); +#else + return Tcl_BadChannelOption(interp, optionName, ""); +#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ } /* *---------------------------------------------------------------------- * - * SocketEventProc -- + * TcpGetOptionProc -- * - * This function is called by Tcl_ServiceEvent when a socket event - * reaches the front of the event queue. This function is responsible for - * notifying the generic channel code. + * 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: - * 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. + * 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: - * Whatever the channel callback functions do. + * None. * *---------------------------------------------------------------------- */ static int -SocketEventProc( - Tcl_Event *evPtr, /* Event to service. */ - int flags) /* Flags that indicate what events to handle, - * such as TCL_FILE_EVENTS. */ +TcpGetOptionProc( + ClientData instanceData, /* Socket state. */ + Tcl_Interp *interp, /* For error reporting - can be NULL */ + const 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. */ { - TcpState *statePtr; - SocketEvent *eventPtr = (SocketEvent *) evPtr; - 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; - } + SocketInfo *infoPtr; + SOCKADDR_IN sockname; + SOCKADDR_IN peername; + struct hostent *hostEntPtr; + SOCKET sock; + int size = sizeof(SOCKADDR_IN); + size_t len = 0; + char buf[TCL_INTEGER_SPACE]; /* - * Find the specified socket on the socket list. + * 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. */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if (statePtr->sockets->fd == eventPtr->socket) { - break; + if (!SocketsEnabled()) { + if (interp) { + Tcl_AppendResult(interp, "winsock is not initialized", NULL); } + return TCL_ERROR; } - /* - * Discard events that have gone stale. - */ - - if (!statePtr) { - SetEvent(tsdPtr->socketListLock); - return 1; + infoPtr = (SocketInfo *) instanceData; + sock = (int) infoPtr->socket; + if (optionName != NULL) { + len = strlen(optionName); } - /* - * Clear flag that (this) event is pending - */ - - statePtr->flags &= ~SOCKET_PENDING; - - /* - * Continue async connect if pending and ready - */ - - if ( statePtr->readyEvents & FD_CONNECT ) { - if ( statePtr->flags & TCP_ASYNC_PENDING ) { + if ((len > 1) && (optionName[1] == 'e') && + (strncmp(optionName, "-error", len) == 0)) { + int optlen; + DWORD err; + int ret; - /* - * Do one step and save eventual connect error - */ + optlen = sizeof(int); + ret = TclWinGetSockOpt((int)sock, SOL_SOCKET, SO_ERROR, + (char *)&err, &optlen); + if (ret == SOCKET_ERROR) { + err = WSAGetLastError(); + } + if (err) { + TclWinConvertWSAError(err); + Tcl_DStringAppend(dsPtr, Tcl_ErrnoMsg(Tcl_GetErrno()), -1); + } + return TCL_OK; + } - SetEvent(tsdPtr->socketListLock); - WaitForConnect(statePtr,NULL); + if ((len == 0) || ((len > 1) && (optionName[1] == 'p') && + (strncmp(optionName, "-peername", len) == 0))) { + if (getpeername(sock, (LPSOCKADDR) &peername, &size) == 0) { + if (len == 0) { + Tcl_DStringAppendElement(dsPtr, "-peername"); + Tcl_DStringStartSublist(dsPtr); + } + Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr)); + if (peername.sin_addr.s_addr == 0) { + hostEntPtr = NULL; + } else { + hostEntPtr = gethostbyaddr((char *) &(peername.sin_addr), + sizeof(peername.sin_addr), AF_INET); + } + if (hostEntPtr != NULL) { + Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name); + } else { + Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr)); + } + TclFormatInt(buf, ntohs(peername.sin_port)); + Tcl_DStringAppendElement(dsPtr, buf); + if (len == 0) { + Tcl_DStringEndSublist(dsPtr); + } else { + return TCL_OK; + } } else { - /* - * No async connect reenter pending. Just clear event. + * 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 (such sockets have no + * peer). {Copied from unix/tclUnixChan.c} */ - statePtr->readyEvents &= ~(FD_CONNECT); - SetEvent(tsdPtr->socketListLock); + if (len) { + TclWinConvertWSAError((DWORD) WSAGetLastError()); + if (interp) { + Tcl_AppendResult(interp, "can't get peername: ", + Tcl_PosixError(interp), NULL); + } + return TCL_ERROR; + } } - return 1; } - /* - * Handle connection requests directly. - */ - if (statePtr->readyEvents & FD_ACCEPT) { - for (fds = statePtr->sockets; fds != NULL; fds = fds->next) { - - /* - * 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; + if ((len == 0) || ((len > 1) && (optionName[1] == 's') && + (strncmp(optionName, "-sockname", len) == 0))) { + if (getsockname(sock, (LPSOCKADDR) &sockname, &size) == 0) { + if (len == 0) { + Tcl_DStringAppendElement(dsPtr, "-sockname"); + Tcl_DStringStartSublist(dsPtr); } - - /* - * 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. - */ - statePtr->acceptEventCount--; - - if (statePtr->acceptEventCount <= 0) { - statePtr->readyEvents &= ~(FD_ACCEPT); + Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr)); + if (sockname.sin_addr.s_addr == 0) { + hostEntPtr = NULL; + } else { + hostEntPtr = gethostbyaddr((char *) &(sockname.sin_addr), + sizeof(peername.sin_addr), AF_INET); } - - 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 statePtr 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; + if (hostEntPtr != NULL) { + Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name); + } else { + Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr)); + } + TclFormatInt(buf, ntohs(sockname.sin_port)); + Tcl_DStringAppendElement(dsPtr, buf); + if (len == 0) { + Tcl_DStringEndSublist(dsPtr); + } else { + return TCL_OK; + } + } else { + if (interp) { + TclWinConvertWSAError((DWORD) WSAGetLastError()); + Tcl_AppendResult(interp, "can't get sockname: ", + Tcl_PosixError(interp), NULL); + } + return TCL_ERROR; } - - /* 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. - */ - statePtr->acceptEventCount = 0; - statePtr->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. - */ - - events = statePtr->readyEvents & statePtr->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|TCL_WRITABLE; - } else if (events & FD_READ) { - - /* - * Throw the readable event if an async connect failed. - */ - - if ( statePtr->flags & TCP_ASYNC_FAILED ) { - - mask |= TCL_READABLE; +#ifdef TCL_FEATURE_KEEPALIVE_NAGLE + if (len == 0 || !strncmp(optionName, "-keepalive", len)) { + int optlen; + BOOL opt = FALSE; + if (len == 0) { + Tcl_DStringAppendElement(dsPtr, "-keepalive"); + } + optlen = sizeof(BOOL); + getsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (char *)&opt, &optlen); + if (opt) { + Tcl_DStringAppendElement(dsPtr, "1"); } else { - 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. - */ - - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) UNSELECT, (LPARAM) statePtr); - - FD_ZERO(&readFds); - FD_SET(statePtr->sockets->fd, &readFds); - timeout.tv_usec = 0; - timeout.tv_sec = 0; - - if (select(0, &readFds, NULL, NULL, &timeout) != 0) { - mask |= TCL_READABLE; - } else { - statePtr->readyEvents &= ~(FD_READ); - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) SELECT, (LPARAM) statePtr); - } + Tcl_DStringAppendElement(dsPtr, "0"); + } + if (len > 0) { + return TCL_OK; } } - /* - * writable event - */ + if (len == 0 || !strncmp(optionName, "-nagle", len)) { + int optlen; + BOOL opt = FALSE; - if (events & FD_WRITE) { - mask |= TCL_WRITABLE; + if (len == 0) { + Tcl_DStringAppendElement(dsPtr, "-nagle"); + } + optlen = sizeof(BOOL); + getsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&opt, + &optlen); + if (opt) { + Tcl_DStringAppendElement(dsPtr, "0"); + } else { + Tcl_DStringAppendElement(dsPtr, "1"); + } + if (len > 0) { + return TCL_OK; + } } +#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ - /* - * Call registered event procedures - */ - - if (mask) { - Tcl_NotifyChannel(statePtr->channel, mask); + if (len > 0) { +#ifdef TCL_FEATURE_KEEPALIVE_NAGLE + return Tcl_BadChannelOption(interp, optionName, + "peername sockname keepalive nagle"); +#else + return Tcl_BadChannelOption(interp, optionName, "peername sockname"); +#endif /*TCL_FEATURE_KEEPALIVE_NAGLE*/ } - return 1; + + return TCL_OK; } /* *---------------------------------------------------------------------- * - * AddSocketInfoFd -- + * TcpWatchProc -- * - * This function adds a SOCKET file descriptor to the 'sockets' linked - * list of a TcpState structure. + * Informs the channel driver of the events that the generic channel code + * wishes to receive on this socket. * * Results: * None. * * Side effects: - * None, except for allocation of memory. + * May cause the notifier to poll if any of the specified conditions are + * already true. * *---------------------------------------------------------------------- */ static void -AddSocketInfoFd( - TcpState *statePtr, - SOCKET socket) -{ - TcpFdList *fds = statePtr->sockets; - - if ( fds == NULL ) { - /* Add the first FD */ - statePtr->sockets = ckalloc(sizeof(TcpFdList)); - fds = statePtr->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->statePtr = statePtr; - fds->next = NULL; -} - - -/* - *---------------------------------------------------------------------- - * - * NewSocketInfo -- - * - * This function allocates and initializes a new TcpState structure. - * - * Results: - * Returns a newly allocated TcpState. - * - * Side effects: - * None, except for allocation of memory. - * - *---------------------------------------------------------------------- - */ - -static TcpState * -NewSocketInfo(SOCKET socket) +TcpWatchProc( + ClientData instanceData, /* The socket state. */ + int mask) /* Events of interest; an OR-ed combination of + * TCL_READABLE, TCL_WRITABLE and + * TCL_EXCEPTION. */ { - TcpState *statePtr = ckalloc(sizeof(TcpState)); - - memset(statePtr, 0, sizeof(TcpState)); + SocketInfo *infoPtr = (SocketInfo *) instanceData; /* - * TIP #218. Removed the code inserting the new structure into the global - * list. This is now handled in the thread action callbacks, and only - * there. + * Update the watch events mask. Only if the socket is not a server + * socket. Fix for SF Tcl Bug #557878. */ - AddSocketInfoFd(statePtr, socket); + if (!infoPtr->acceptProc) { + infoPtr->watchEvents = 0; + if (mask & TCL_READABLE) { + infoPtr->watchEvents |= (FD_READ|FD_CLOSE|FD_ACCEPT); + } + if (mask & TCL_WRITABLE) { + infoPtr->watchEvents |= (FD_WRITE|FD_CLOSE|FD_CONNECT); + } + + /* + * If there are any conditions already set, then tell the notifier to + * poll rather than block. + */ - return statePtr; + if (infoPtr->readyEvents & infoPtr->watchEvents) { + Tcl_Time blockTime = { 0, 0 }; + Tcl_SetMaxBlockTime(&blockTime); + } + } } /* *---------------------------------------------------------------------- * - * WaitForSocketEvent -- + * TcpGetProc -- * - * Waits until one of the specified events occurs on a socket. - * For event FD_CONNECT use WaitForConnect. + * Called from Tcl_GetChannelHandle to retrieve an OS handle from inside + * a TCP socket based channel. * * Results: - * Returns 1 on success or 0 on failure, with an error code in - * errorCodePtr. + * Returns TCL_OK with the socket in handlePtr. * * Side effects: - * Processes socket events off the system queue. + * None. * *---------------------------------------------------------------------- */ static int -WaitForSocketEvent( - TcpState *statePtr, /* Information about this socket. */ - int events, /* Events to look for. May be one of - * FD_READ or FD_WRITE. - */ - int *errorCodePtr) /* Where to store errors? */ +TcpGetHandleProc( + ClientData instanceData, /* The socket state. */ + int direction, /* Not used. */ + ClientData *handlePtr) /* Where to store the handle. */ { - int result = 1; - int oldMode; - ThreadSpecificData *tsdPtr = 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. - */ - - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) UNSELECT, - (LPARAM) statePtr); - SendMessage(tsdPtr->hwnd, SOCKET_SELECT, (WPARAM) SELECT, - (LPARAM) statePtr); - - while (1) { - int event_found; + SocketInfo *statePtr = (SocketInfo *) instanceData; - /* get statePtr lock */ - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - - /* Check if event occured */ - event_found = (statePtr->readyEvents & events); - - /* Free list lock */ - SetEvent(tsdPtr->socketListLock); - - /* exit loop if event occured */ - if (event_found) { - break; - } - - /* Exit loop if event did not occur but this is a non-blocking channel */ - if (statePtr->flags & TCP_NONBLOCKING) { - *errorCodePtr = EWOULDBLOCK; - result = 0; - break; - } - - /* - * Wait until something happens. - */ - - WaitForSingleObject(tsdPtr->readyEvent, INFINITE); - } - - (void) Tcl_SetServiceMode(oldMode); - return result; + *handlePtr = (ClientData) statePtr->socket; + return TCL_OK; } /* @@ -2992,14 +2224,14 @@ SocketThread( LPVOID arg) { MSG msg; - ThreadSpecificData *tsdPtr = arg; + ThreadSpecificData *tsdPtr = (ThreadSpecificData *)(arg); /* * 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("TclSocket", "TclSocket", + WS_TILED, 0, 0, 0, 0, NULL, NULL, windowClass.hInstance, arg); /* * Signalize thread creator that we are done creating the window. @@ -3062,9 +2294,8 @@ SocketProc( { int event, error; SOCKET socket; - TcpState *statePtr; + SocketInfo *infoPtr; int info_found = 0; - TcpFdList *fds = NULL; ThreadSpecificData *tsdPtr = (ThreadSpecificData *) #ifdef _WIN64 GetWindowLongPtr(hwnd, GWLP_USERDATA); @@ -3101,16 +2332,15 @@ SocketProc( error = WSAGETSELECTERROR(lParam); socket = (SOCKET) wParam; - WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - /* * Find the specified socket on the socket list and update its * eventState flag. */ - for (statePtr = tsdPtr->socketList; statePtr != NULL; - statePtr = statePtr->nextPtr) { - if ( FindFDInList(statePtr,socket) ) { + WaitForSingleObject(tsdPtr->socketListLock, INFINITE); + for (infoPtr = tsdPtr->socketList; infoPtr != NULL; + infoPtr = infoPtr->nextPtr) { + if (infoPtr->socket == socket) { info_found = 1; break; } @@ -3120,9 +2350,9 @@ SocketProc( * list */ if ( !info_found - && tsdPtr->pendingTcpState != NULL - && FindFDInList(tsdPtr->pendingTcpState,socket) ) { - statePtr = tsdPtr->pendingTcpState; + && tsdPtr->pendingSocketInfo != NULL + && tsdPtr->pendingSocketInfo->socket ==socket ) { + infoPtr = tsdPtr->pendingSocketInfo; info_found = 1; } if (info_found) { @@ -3136,29 +2366,44 @@ SocketProc( */ if (event & FD_CLOSE) { - statePtr->acceptEventCount = 0; - statePtr->readyEvents &= ~(FD_WRITE|FD_ACCEPT); + infoPtr->acceptEventCount = 0; + infoPtr->readyEvents &= ~(FD_WRITE|FD_ACCEPT); } else if (event & FD_ACCEPT) { - statePtr->acceptEventCount++; + infoPtr->acceptEventCount++; } 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) { - statePtr->notifierConnectError = error; + /* Async Connect error */ + TclWinConvertWSAError((DWORD) error); + infoPtr->lastError = Tcl_GetErrno(); + /* Fire also readable event on connect failure */ + infoPtr->readyEvents |= FD_READ; } + + /* fire writable event on connect */ + infoPtr->readyEvents |= FD_WRITE; + } - /* - * Inform main thread about signaled events - */ - statePtr->readyEvents |= event; + + infoPtr->readyEvents |= event; /* * Wake up the Main Thread. */ + SetEvent(tsdPtr->readyEvent); Tcl_ThreadAlert(tsdPtr->threadId); } @@ -3166,18 +2411,20 @@ SocketProc( break; case SOCKET_SELECT: - statePtr = (TcpState *) lParam; - for (fds = statePtr->sockets; fds != NULL; fds = fds->next) { - if (wParam == SELECT) { - WSAAsyncSelect(fds->fd, hwnd, - SOCKET_MESSAGE, statePtr->selectEvents); - } else { - /* - * Clear the selection mask - */ + infoPtr = (SocketInfo *) lParam; + if (wParam == SELECT) { + /* + * Start notification by windows messages on socket events + */ - WSAAsyncSelect(fds->fd, hwnd, 0, 0); - } + WSAAsyncSelect(infoPtr->socket, hwnd, + SOCKET_MESSAGE, infoPtr->selectEvents); + } else { + /* + * UNSELECT: Clear the selection mask + */ + + WSAAsyncSelect(infoPtr->socket, hwnd, 0, 0); } break; @@ -3192,31 +2439,83 @@ SocketProc( /* *---------------------------------------------------------------------- * - * FindFDInList -- + * Tcl_GetHostName -- * - * Return true, if the given file descriptior is contained in the - * file descriptor list. + * Returns the name of the local host. * * Results: - * true if found. + * A string containing the network name for this machine. The caller must + * not modify or free this string. * * Side effects: + * Caches the name to return for future calls. * *---------------------------------------------------------------------- */ -static int -FindFDInList( - TcpState *statePtr, - SOCKET socket) +const char * +Tcl_GetHostName(void) +{ + return Tcl_GetString(TclGetProcessGlobalValue(&hostName)); +} + +/* + *---------------------------------------------------------------------- + * + * InitializeHostName -- + * + * This routine sets the process global value of the name of the local + * host on which the process is running. + * + * Results: + * None. + * + *---------------------------------------------------------------------- + */ + +void +InitializeHostName( + char **valuePtr, + int *lengthPtr, + Tcl_Encoding *encodingPtr) { - TcpFdList *fds; - for (fds = statePtr->sockets; fds != NULL; fds = fds->next) { - if (fds->fd == socket) { - return 1; + WCHAR wbuf[MAX_COMPUTERNAME_LENGTH + 1]; + DWORD length = sizeof(wbuf) / sizeof(WCHAR); + Tcl_DString ds; + + if ((*tclWinProcs->getComputerNameProc)(wbuf, &length) != 0) { + /* + * Convert string from native to UTF then change to lowercase. + */ + + Tcl_UtfToLower(Tcl_WinTCharToUtf((TCHAR *) wbuf, -1, &ds)); + + } else { + Tcl_DStringInit(&ds); + if (TclpHasSockets(NULL) == TCL_OK) { + /* + * 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, 256); + if (gethostname(Tcl_DStringValue(&inDs), + Tcl_DStringLength(&inDs)) == 0) { + Tcl_ExternalToUtfDString(NULL, Tcl_DStringValue(&inDs), -1, + &ds); + } + Tcl_DStringFree(&inDs); } } - return 0; + + *encodingPtr = Tcl_GetEncoding(NULL, "utf-8"); + *lengthPtr = Tcl_DStringLength(&ds); + *valuePtr = ckalloc((unsigned int) (*lengthPtr)+1); + memcpy(*valuePtr, Tcl_DStringValue(&ds), (size_t)(*lengthPtr)+1); + Tcl_DStringFree(&ds); } /* @@ -3224,11 +2523,10 @@ FindFDInList( * * TclWinGetSockOpt, et al. -- * - * Those functions are historically exported by the stubs table and - * just use the original system calls now. - * - * Warning: - * Those functions are depreciated and will be removed with TCL 9.0. + * 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. @@ -3241,35 +2539,26 @@ FindFDInList( #undef TclWinGetSockOpt int -TclWinGetSockOpt( - SOCKET s, - int level, - int optname, - char *optval, - int *optlen) +TclWinGetSockOpt(SOCKET s, int level, int optname, char *optval, + int *optlen) { - return getsockopt(s, level, optname, optval, optlen); } + #undef TclWinSetSockOpt int -TclWinSetSockOpt( - SOCKET s, - int level, - int optname, - const char *optval, +TclWinSetSockOpt(SOCKET s, int level, int optname, const char *optval, int optlen) { return setsockopt(s, level, optname, optval, optlen); } -#undef TclpInetNtoa char * -TclpInetNtoa( - struct in_addr addr) +TclpInetNtoa(struct in_addr addr) { return inet_ntoa(addr); } + #undef TclWinGetServByName struct servent * TclWinGetServByName( @@ -3301,7 +2590,7 @@ TcpThreadActionProc( int action) { ThreadSpecificData *tsdPtr; - TcpState *statePtr = instanceData; + SocketInfo *infoPtr = (SocketInfo *) instanceData; int notifyCmd; if (action == TCL_CHANNEL_THREAD_INSERT) { @@ -3317,18 +2606,18 @@ TcpThreadActionProc( tsdPtr = TCL_TSD_INIT(&dataKey); WaitForSingleObject(tsdPtr->socketListLock, INFINITE); - statePtr->nextPtr = tsdPtr->socketList; - tsdPtr->socketList = statePtr; - - if (statePtr == tsdPtr->pendingTcpState) { - tsdPtr->pendingTcpState = NULL; + infoPtr->nextPtr = tsdPtr->socketList; + tsdPtr->socketList = infoPtr; + + if (infoPtr == tsdPtr->pendingSocketInfo) { + tsdPtr->pendingSocketInfo = NULL; } - + SetEvent(tsdPtr->socketListLock); notifyCmd = SELECT; } else { - TcpState **nextPtrPtr; + SocketInfo **nextPtrPtr; int removed = 0; tsdPtr = TCL_TSD_INIT(&dataKey); @@ -3341,8 +2630,8 @@ TcpThreadActionProc( WaitForSingleObject(tsdPtr->socketListLock, INFINITE); for (nextPtrPtr = &(tsdPtr->socketList); (*nextPtrPtr) != NULL; nextPtrPtr = &((*nextPtrPtr)->nextPtr)) { - if ((*nextPtrPtr) == statePtr) { - (*nextPtrPtr) = statePtr->nextPtr; + if ((*nextPtrPtr) == infoPtr) { + (*nextPtrPtr) = infoPtr->nextPtr; removed = 1; break; } @@ -3368,7 +2657,7 @@ TcpThreadActionProc( */ SendMessage(tsdPtr->hwnd, SOCKET_SELECT, - (WPARAM) notifyCmd, (LPARAM) statePtr); + (WPARAM) notifyCmd, (LPARAM) infoPtr); } /* @@ -3376,7 +2665,5 @@ TcpThreadActionProc( * mode: c * c-basic-offset: 4 * fill-column: 78 - * tab-width: 8 - * indent-tabs-mode: nil * End: */ |