diff options
Diffstat (limited to 'win/tclWinSock.c')
| -rw-r--r-- | win/tclWinSock.c | 146 |
1 files changed, 94 insertions, 52 deletions
diff --git a/win/tclWinSock.c b/win/tclWinSock.c index 7593396..dc67c4b 100644 --- a/win/tclWinSock.c +++ b/win/tclWinSock.c @@ -174,7 +174,9 @@ struct TcpState { struct addrinfo *myaddr; /* Iterator over myaddrlist. */ int connectError; /* Cache status of async socket. */ int cachedBlocking; /* Cache blocking mode of async socket. */ - volatile int connectError; /* Async connect error set by notifier thread. + 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 * list. */ @@ -185,19 +187,17 @@ struct TcpState { * structure. */ -#define TCP_ASYNC_SOCKET (1<<0) /* Asynchronous socket. */ +#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_CONNECT_REENTER_PENDING (1<<4) - /* TcpConnect was called to +#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_CONNECT_FAILED (1<<5) - /* An async connect finally failed */ +#define TCP_ASYNC_FAILED (1<<5) /* An async connect finally failed */ /* * The following structure is what is added to the Tcl event queue when a @@ -540,9 +540,9 @@ TcpBlockModeProc( TcpState *statePtr = instanceData; if (mode == TCL_MODE_NONBLOCKING) { - statePtr->flags |= TCP_ASYNC_SOCKET; + statePtr->flags |= TCP_NONBLOCKING; } else { - statePtr->flags &= ~(TCP_ASYNC_SOCKET); + statePtr->flags &= ~(TCP_NONBLOCKING); } return 0; } @@ -554,12 +554,19 @@ TcpBlockModeProc( * * 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. + * start the next attempt. If a connect error occures, it is saved + * in statePtr->connectError to be reported by 'fconfigure -error'. + * * There are two modes of operation, defined by errorCodePtr: * * non-NULL: Called by explicite read/write command. block if - * socket is blocking. Return a possible error and clear it. - * * Null: Called by a backround operation. Never block and - * save eventual error in statePtr->connectError. + * 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. * * Results: * 0 if the connection has completed, -1 if still in progress @@ -577,10 +584,6 @@ WaitForConnect( TcpState *statePtr, /* State of the socket. */ int *errorCodePtr) /* Where to store errors? * A passed null-pointer activates background mode. - * In this case, a possible error is stored in - * statePtr->connectError. - * In addition, we do never block and allow the next - * processing cycle to happen. */ { int result; @@ -588,21 +591,21 @@ WaitForConnect( ThreadSpecificData *tsdPtr; /* - * Check if an async connect error is not jet reported. - * If yes, report it now. + * Check if an async connect failed already and error reporting is demanded, + * return the error ENOTCONN */ - if ( errorCodePtr != NULL && statePtr->connectError != 0 ) { - *errorCodePtr = statePtr->connectError; - statePtr->connectError = 0; + if ( errorCodePtr != NULL && + (statePtr->flags & TCP_ASYNC_FAILED) ) { + *errorCodePtr = ENOTCONN; return -1; } /* * Check if an async connect is running. If not return ok */ - - if ( !(statePtr->flags & TCP_ASYNC_CONNECT_REENTER_PENDING) ) + + if ( !(statePtr->flags & TCP_ASYNC_PENDING) ) return 0; /* @@ -611,6 +614,10 @@ WaitForConnect( oldMode = Tcl_SetServiceMode(TCL_SERVICE_NONE); + /* + * Loop in the blocking case until the connect signal is present + */ + while (1) { /* get statePtr lock */ @@ -628,22 +635,32 @@ WaitForConnect( * disable async connect as we continue now synchoneously */ if ( errorCodePtr != NULL && - ! (statePtr->flags & TCP_ASYNC_SOCKET) ) { + ! (statePtr->flags & TCP_NONBLOCKING) ) { CLEAR_BITS(statePtr->flags, TCP_ASYNC_CONNECT); } /* Free list lock */ SetEvent(tsdPtr->socketListLock); - /* continue connect */ + /* + * Continue connect. + * If switched to synchroneous connect, the connect is terminated. + */ result = TcpConnect(NULL, statePtr); /* Restore event service mode */ (void) Tcl_SetServiceMode(oldMode); - /* Succesfully connected or async connect restarted */ + /* + * Check for Succesfull connect or async connect restart + */ + if (result == TCL_OK) { - if ( statePtr->flags & TCP_ASYNC_CONNECT_REENTER_PENDING ) { + /* + * Check for async connect restart + * (not possible for foreground blocking operation) + */ + if ( statePtr->flags & TCP_ASYNC_PENDING ) { if (errorCodePtr != NULL) { *errorCodePtr = EWOULDBLOCK; } @@ -651,11 +668,14 @@ WaitForConnect( } return 0; } - /* error case */ + + /* + * Connect finally failed. + * For foreground operation return ENOTCONN. + */ + if (errorCodePtr != NULL) { - *errorCodePtr = Tcl_GetErrno(); - } else { - statePtr->connectError = Tcl_GetErrno(); + *errorCodePtr = ENOTCONN; } return -1; } @@ -664,14 +684,20 @@ WaitForConnect( SetEvent(tsdPtr->socketListLock); /* - * A non blocking socket waiting for an asyncronous connect - * returns directly an error + * Background operation returns with no action as there was no connect + * event */ + if ( errorCodePtr == NULL ) { - /* Backround operation */ return -1; - } else if (statePtr->flags & TCP_ASYNC_SOCKET) { - /* foreground operation but non blocking socket */ + } + + /* + * A non blocking socket waiting for an asyncronous connect + * returns directly the error EWOULDBLOCK + */ + + if (statePtr->flags & TCP_NONBLOCKING) { *errorCodePtr = EWOULDBLOCK; return -1; } @@ -803,7 +829,7 @@ TcpInputProc( * Check for error condition or underflow in non-blocking case. */ - if ((statePtr->flags & TCP_ASYNC_SOCKET) || (error != WSAEWOULDBLOCK)) { + if ((statePtr->flags & TCP_NONBLOCKING) || (error != WSAEWOULDBLOCK)) { TclWinConvertError(error); *errorCodePtr = Tcl_GetErrno(); bytesRead = -1; @@ -908,7 +934,7 @@ TcpOutputProc( error = WSAGetLastError(); if (error == WSAEWOULDBLOCK) { statePtr->readyEvents &= ~(FD_WRITE); - if (statePtr->flags & TCP_ASYNC_SOCKET) { + if (statePtr->flags & TCP_NONBLOCKING) { *errorCodePtr = EWOULDBLOCK; written = -1; break; @@ -1249,10 +1275,10 @@ TcpGetOptionProc( /* * Do not return any errors if async connect is running */ - if ( ! (statePtr->flags & TCP_ASYNC_CONNECT_REENTER_PENDING) ) { + if ( ! (statePtr->flags & TCP_ASYNC_PENDING) ) { - if ( statePtr->flags & TCP_ASYNC_CONNECT_FAILED ) { + if ( statePtr->flags & TCP_ASYNC_FAILED ) { /* * In case of a failed async connect, eventually report the @@ -1280,7 +1306,7 @@ TcpGetOptionProc( * Populater the err Variable with a possix error */ optlen = sizeof(int); - ret = TclWinGetSockOpt(sock, SOL_SOCKET, SO_ERROR, + ret = getsockopt(sock, SOL_SOCKET, SO_ERROR, (char *)&err, &optlen); /* * The error was not returned directly but should be @@ -1305,7 +1331,7 @@ TcpGetOptionProc( (strncmp(optionName, "-connecting", len) == 0)) { Tcl_DStringAppend(dsPtr, - (statePtr->flags & TCP_ASYNC_CONNECT_REENTER_PENDING) + (statePtr->flags & TCP_ASYNC_PENDING) ? "1" : "0", -1); return TCL_OK; } @@ -1645,7 +1671,7 @@ TcpConnect( /* * Reset last error from last try */ - statePtr->connectError = 0; + statePtr->notifierConnectError = 0; Tcl_SetErrno(0); statePtr->sockets->fd = socket(statePtr->myaddr->ai_family, SOCK_STREAM, 0); @@ -1747,7 +1773,7 @@ TcpConnect( /* * Remember that we jump back behind this next round */ - statePtr->flags |= TCP_ASYNC_CONNECT_REENTER_PENDING; + statePtr->flags |= TCP_ASYNC_PENDING; return TCL_OK; reenter: @@ -1757,11 +1783,11 @@ TcpConnect( * * Clear the reenter flag */ - statePtr->flags &= ~(TCP_ASYNC_CONNECT_REENTER_PENDING); + statePtr->flags &= ~(TCP_ASYNC_PENDING); /* get statePtr lock */ WaitForSingleObject(tsdPtr->socketListLock, INFINITE); /* Get signaled connect error */ - Tcl_SetErrno(statePtr->connectError); + TclWinConvertError((DWORD) statePtr->notifierConnectError); /* Clear eventual connect flag */ statePtr->selectEvents &= ~(FD_CONNECT); /* Free list lock */ @@ -1819,7 +1845,9 @@ out: /* Signal ready readable and writable events */ statePtr->readyEvents |= FD_WRITE | FD_READ; /* Flag error to event routine */ - statePtr->flags |= TCP_ASYNC_CONNECT_FAILED; + statePtr->flags |= TCP_ASYNC_FAILED; + /* Save connect error to be reported by 'fconfigure -error' */ + statePtr->connectError = Tcl_GetErrno(); /* Free list lock */ SetEvent(tsdPtr->socketListLock); } @@ -2260,6 +2288,12 @@ TcpAccept( * * Assumes socketMutex is held. * + * 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. + * Any failures may be reported as panics. + * * Results: * None. * @@ -2393,6 +2427,11 @@ InitSockets(void) * * Check that the WinSock was successfully initialized. * + * 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 + * * Results: * 1 if it is. * @@ -2622,7 +2661,7 @@ SocketEventProc( */ if ( statePtr->readyEvents & FD_CONNECT ) { - if ( statePtr->flags & TCP_ASYNC_CONNECT_REENTER_PENDING ) { + if ( statePtr->flags & TCP_ASYNC_PENDING ) { /* * Do one step and save eventual connect error @@ -2735,7 +2774,7 @@ SocketEventProc( * Throw the readable event if an async connect failed. */ - if ( statePtr->flags & TCP_ASYNC_CONNECT_FAILED ) { + if ( statePtr->flags & TCP_ASYNC_FAILED ) { mask |= TCL_READABLE; @@ -2928,7 +2967,7 @@ WaitForSocketEvent( } /* Exit loop if event did not occur but this is a non-blocking channel */ - if (statePtr->flags & TCP_ASYNC_SOCKET) { + if (statePtr->flags & TCP_NONBLOCKING) { *errorCodePtr = EWOULDBLOCK; result = 0; break; @@ -3122,8 +3161,7 @@ SocketProc( * connection failures. */ if (error != ERROR_SUCCESS) { - TclWinConvertError((DWORD) error); - statePtr->connectError = Tcl_GetErrno(); + statePtr->notifierConnectError = error; } } /* @@ -3203,6 +3241,10 @@ FindFDInList( * 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. + * Those functions are exported by the stubs table. + * + * Warning: + * Those functions are depreciated and will be removed with TCL 9.0. * * Results: * As defined for each function. |