ANSC_STATUS AnscSctoCancel ( ANSC_HANDLE hThisObject ) { PANSC_SIMPLE_CLIENT_TCP_OBJECT pMyObject = (PANSC_SIMPLE_CLIENT_TCP_OBJECT)hThisObject; if ( !pMyObject->bActive ) { return ANSC_STATUS_SUCCESS; } else { pMyObject->bShuttingDown = TRUE; pMyObject->bActive = FALSE; pMyObject->bClosed = TRUE; while ( pMyObject->EngineTaskCount != 0 ) { AnscSleep(500); } } #ifdef _ANSC_USE_OPENSSL_ if ( pMyObject->hTlsConnection ) { SSL *ssl = (SSL *) pMyObject->hTlsConnection; AnscTrace ("SSL connection %p is closed.\n", ssl); SSL_shutdown (ssl); SSL_free (ssl); } #else if ( pMyObject->bTlsEnabled && pMyObject->hTlsScsIf ) { PTLS_SCS_INTERFACE pTlsScsIf = (PTLS_SCS_INTERFACE )pMyObject->hTlsScsIf; AnscSetEvent(&pMyObject->TlsConnEvent); if ( pMyObject->hTlsConnection ) { if ( pMyObject->bTlsConnected ) { pTlsScsIf->CloseConnection ( pTlsScsIf->hOwnerContext, pMyObject->hTlsConnection ); } pTlsScsIf->RemoveConnection ( pTlsScsIf->hOwnerContext, pMyObject->hTlsConnection ); } pMyObject->bTlsConnected = FALSE; } #endif if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { if ( (XSKT_SOCKET)pMyObject->Socket != XSKT_SOCKET_INVALID_SOCKET ) { _xskt_shutdown (((XSKT_SOCKET)pMyObject->Socket), XSKT_SOCKET_SD_RECV); _xskt_closesocket(((XSKT_SOCKET)pMyObject->Socket)); pMyObject->Socket = (ANSC_SOCKET)XSKT_SOCKET_INVALID_SOCKET; } } else { if ( pMyObject->Socket != ANSC_SOCKET_INVALID_SOCKET ) { _ansc_shutdown (pMyObject->Socket, ANSC_SOCKET_SD_RECV); _ansc_closesocket(pMyObject->Socket); pMyObject->Socket = ANSC_SOCKET_INVALID_SOCKET; } } /* * The underlying socket wrapper may require an explicit cleanup() call, such is the case on * Microsoft windows platforms. The wrapper initialization has to done for each task. On most * real-time operating systems, this call is not required. */ if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { AnscCleanupXsocketWrapper((ANSC_HANDLE)pMyObject); } else { AnscCleanupSocketWrapper((ANSC_HANDLE)pMyObject); } pMyObject->Reset((ANSC_HANDLE)pMyObject); return ANSC_STATUS_SUCCESS; }
ANSC_STATUS AnscSctoEngage ( ANSC_HANDLE hThisObject ) { ANSC_STATUS returnStatus = ANSC_STATUS_SUCCESS; PANSC_SIMPLE_CLIENT_TCP_OBJECT pMyObject = (PANSC_SIMPLE_CLIENT_TCP_OBJECT)hThisObject; PANSC_SCTO_WORKER_OBJECT pWorker = (PANSC_SCTO_WORKER_OBJECT )pMyObject->hWorker; int s_error = 0; ansc_socket_addr_in ansc_client_addr; ansc_socket_addr_in ansc_server_addr; xskt_socket_addr_in xskt_client_addr; xskt_socket_addr_in xskt_server_addr; #ifdef _ANSC_IPV6_COMPATIBLE_ ansc_addrinfo ansc_hints = {0}; ansc_addrinfo* pansc_server_addrinfo = NULL; ansc_addrinfo* pansc_client_addrinfo = NULL; xskt_addrinfo xskt_hints = {0}; xskt_addrinfo* pxskt_server_addrinfo = NULL; xskt_addrinfo* pxskt_client_addrinfo = NULL; USHORT usPort = 0; char port[6] = {0}; #endif if ( pMyObject->bActive ) { return ANSC_STATUS_SUCCESS; } else if ( !pWorker ) { return ANSC_STATUS_UNAPPLICABLE; } else { /* * Just like any other socket-based ANSC object, we will create a separate async recv task * which is dedicated to receiving packets. This async recv task is controlled by 'bActive' * flag. What if at this moment right before we're about to enable the socket operation and * setting 'bActive' flag to TRUE, the old recv task created by the last call of Engage() * is still running? While it may not cause crash, but it certainly confuses the owner * object because all async recv tasks share the same worker interface. The most obvious * solution is to wait for previous recv task to exit before creating a new one. */ while ( pMyObject->EngineTaskCount != 0 ) { AnscSleep(50); } pMyObject->bActive = TRUE; pMyObject->bClosed = FALSE; } /* * The underlying socket wrapper may require an explicit startup() call, such is the case on * Microsoft windows platforms. The wrapper initialization has to done for each task. On most * real-time operating systems, this call is not required. */ if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { AnscStartupXsocketWrapper((ANSC_HANDLE)pMyObject); } else { AnscStartupSocketWrapper((ANSC_HANDLE)pMyObject); } #ifdef _ANSC_IPV6_COMPATIBLE_ if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { xskt_hints.ai_family = AF_UNSPEC; xskt_hints.ai_socktype = XSKT_SOCKET_STREAM; xskt_hints.ai_flags = AI_CANONNAME; usPort = pMyObject->GetPeerPort((ANSC_HANDLE)pMyObject); _ansc_sprintf(port, "%d", usPort); AnscTrace("!!! Peer Port: %s !!!\n", port); char * pPeerName = pMyObject->GetPeerName((ANSC_HANDLE)pMyObject); AnscTrace("Peer Name: %s!!!\n", pPeerName); /* struct addrinfo hints,*res=NULL; memset(&hints,0,sizeof(hints)); hints.ai_family=PF_UNSPEC; hints.ai_socktype=SOCK_DGRAM; hints.ai_protocol=IPPROTO_UDP; s_error=getaddrinfo("127.0.0.1","123",&hints,&res); */ /* s_error = _xskt_getaddrinfo ( "10.74.52.92", port, &xskt_hints, &pxskt_server_addrinfo ); AnscTrace("!!!!!! _xskt_getaddrinfo returns: %d %s !!!\n", s_error, gai_strerror(s_error)); */ if ( _xskt_getaddrinfo ( pMyObject->GetPeerName((ANSC_HANDLE)pMyObject), port, &xskt_hints, &pxskt_server_addrinfo ) || _xskt_getaddrinfo ( "localhost", NULL, &xskt_hints, &pxskt_client_addrinfo ) ) { AnscTrace("!!! error 1 !!!\n"); if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT1; } AnscTrace("!!! after getaddrinfo !!!\n"); } else { ansc_hints.ai_family = AF_UNSPEC; ansc_hints.ai_socktype = ANSC_SOCKET_STREAM; ansc_hints.ai_flags = AI_CANONNAME; usPort = pMyObject->GetPeerPort((ANSC_HANDLE)pMyObject); _ansc_sprintf(port, "%d", usPort); if ( _ansc_getaddrinfo ( pMyObject->GetPeerName((ANSC_HANDLE)pMyObject), port, &ansc_hints, &pansc_server_addrinfo ) || _ansc_getaddrinfo ( "localhost", NULL, &ansc_hints, &pansc_client_addrinfo ) ) { if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT1; } } #endif /* * To engage the Tcp Client, we need to perform following acts in the respective order: * * (1) create the os-dependent socket * (2) bind to the newly socket * (3) connect to the specified server address * (4) allocate a buffer for receiving * (5) spawn a separate thread and start receiving */ if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { #ifdef _ANSC_IPV6_COMPATIBLE_ pMyObject->Socket = (ANSC_SOCKET)_xskt_socket(pxskt_server_addrinfo->ai_family, pxskt_server_addrinfo->ai_socktype, 0); #else pMyObject->Socket = (ANSC_SOCKET)_xskt_socket(XSKT_SOCKET_AF_INET, XSKT_SOCKET_STREAM, 0); #endif if ( (XSKT_SOCKET)pMyObject->Socket == XSKT_SOCKET_INVALID_SOCKET ) { AnscTrace("!!!!!!!!!! _xskt_socket error !!!!!!!!!!\n"); if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT1; } else AnscTrace("Opening IPv4 socket Ok\n"); } else { #ifdef _ANSC_IPV6_COMPATIBLE_ pMyObject->Socket = _ansc_socket(pansc_server_addrinfo->ai_family, pansc_server_addrinfo->ai_socktype, 0); #else pMyObject->Socket = _ansc_socket(ANSC_SOCKET_AF_INET, ANSC_SOCKET_STREAM, 0); #endif if ( pMyObject->Socket == ANSC_SOCKET_INVALID_SOCKET ) { if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT1; } } /* * Normally we don't need to know which local network interface we shall bind to, and the * underlying operating system usually supports such notation as "any address". */ #ifndef _ANSC_IPV6_COMPATIBLE_ if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { xskt_client_addr.sin_family = XSKT_SOCKET_AF_INET; xskt_client_addr.sin_port = _xskt_htons(pMyObject->HostPort); if (pMyObject->bSocketBindToDevice && *(pMyObject->SocketDeviceName)) { if (_xskt_setsocketopt ( pMyObject->Socket, XSKT_SOCKET_SOL_SOCKET, XSKT_SOCKET_SO_BINDTODEVICE, pMyObject->SocketDeviceName, _ansc_strlen(pMyObject->SocketDeviceName) + 1 ) < 0) { perror("setsockopt-SOL_SOCKET-SO_BINDTODEVICE"); returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } } // fprintf(stderr, "<RT XSKT> Binding socket to Device '%s'.\n", pMyObject->SocketDeviceName); if ( pMyObject->HostAddress.Value == 0 ) { ((pansc_socket_addr_in)&xskt_client_addr)->sin_addr.s_addr = XSKT_SOCKET_ANY_ADDRESS; } else { ((pansc_socket_addr_in)&xskt_client_addr)->sin_addr.s_addr = pMyObject->HostAddress.Value; } if ( _xskt_bind((XSKT_SOCKET)pMyObject->Socket, (xskt_socket_addr*)&xskt_client_addr, sizeof(xskt_client_addr)) != 0 ) { AnscTrace("!!!!!!!!!! _xskt_bind error: socket=%d, error=%d !!!!!!!!!!\n", (XSKT_SOCKET)pMyObject->Socket, errno); { int j; char s[256]; char *ptr1 = ((xskt_socket_addr*)(&xskt_client_addr))->sa_data; char stmp[16]; s[0] = '\0'; for(j=0; j<13; j++) { sprintf(stmp, "%.2x:", *(ptr1++)); strcat(s, stmp); } sprintf(stmp, "%.2x", *ptr1); strcat(s, stmp); AnscTrace("!!!!!!!!!! _xskt_bind error: client_addr=%s\n", s); } perror("_xskt_bind error"); if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } } else { ansc_client_addr.sin_family = ANSC_SOCKET_AF_INET; ansc_client_addr.sin_port = _ansc_htons(pMyObject->HostPort); if (pMyObject->bSocketBindToDevice && *(pMyObject->SocketDeviceName)) { if (_xskt_setsocketopt ( pMyObject->Socket, ANSC_SOCKET_SOL_SOCKET, ANSC_SOCKET_SO_BINDTODEVICE, pMyObject->SocketDeviceName, _ansc_strlen(pMyObject->SocketDeviceName) + 1 ) < 0) { perror("setsockopt-SOL_SOCKET-SO_BINDTODEVICE"); returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } } // fprintf(stderr, "<RT AnscSKT> Binding socket to Device '%s'.\n", pMyObject->SocketDeviceName); if ( pMyObject->HostAddress.Value == 0 ) { ansc_client_addr.sin_addr.s_addr = ANSC_SOCKET_ANY_ADDRESS; } else { ansc_client_addr.sin_addr.s_addr = pMyObject->HostAddress.Value; } if ( _ansc_bind(pMyObject->Socket, (ansc_socket_addr*)&ansc_client_addr, sizeof(ansc_client_addr)) != 0 ) { AnscTrace("!!!!!!!!!! _ansc_bind error: socket=%d, error=%d !!!!!!!!!!\n", (XSKT_SOCKET)pMyObject->Socket, errno); { int j; char s[256]; char *ptr1 = ((ansc_socket_addr*)(&ansc_client_addr))->sa_data; char stmp[16]; s[0] = '\0'; for(j=0; j<13; j++) { sprintf(stmp, "%.2x:", *(ptr1++)); strcat(s, stmp); } sprintf(stmp, "%.2x", *ptr1); strcat(s, stmp); AnscTrace("!!!!!!!!!! _ansc_bind error: client_addr=%s\n", s); } perror("_ansc_bind error"); if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } } #endif /* * As a Tcp client application, we now try to connect the network server, whose address is * specified by the "peer address" and "peer port" fields. */ if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { #ifdef _ANSC_IPV6_COMPATIBLE_ BOOL bNoConn = TRUE; #endif _ansc_memset(&xskt_server_addr, 0, sizeof(xskt_server_addr)); xskt_server_addr.sin_family = XSKT_SOCKET_AF_INET; xskt_server_addr.sin_addr.s_addr = pMyObject->PeerAddress.Value; xskt_server_addr.sin_port = _xskt_htons(pMyObject->PeerPort); #ifdef _ANSC_IPV6_COMPATIBLE_ while ( bNoConn && pxskt_server_addrinfo ) { if ( _xskt_connect((XSKT_SOCKET)pMyObject->Socket, pxskt_server_addrinfo->ai_addr, pxskt_server_addrinfo->ai_addrlen) != 0 ) { pxskt_server_addrinfo = pxskt_server_addrinfo->ai_next; /* try next ip address */ } else { bNoConn = FALSE; break; } } if ( bNoConn ) #else if ( _xskt_connect((XSKT_SOCKET)pMyObject->Socket, (xskt_socket_addr*)&xskt_server_addr, sizeof(xskt_server_addr)) != 0 ) #endif { AnscTrace("!!!!!!!!!! _xskt_connect error: socket=%d, error=%d !!!!!!!!!!\n", (XSKT_SOCKET)pMyObject->Socket, errno); { int j; char s[256]; char *ptr1 = ((xskt_socket_addr*)(&xskt_server_addr))->sa_data; char stmp[16]; s[0] = '\0'; for(j=0; j<13; j++) { sprintf(stmp, "%.2x:", *(ptr1++)); strcat(s, stmp); } sprintf(stmp, "%.2x", *ptr1); strcat(s, stmp); AnscTrace("!!!!!!!!!! _xskt_connect error: server_addr=%s\n", s); } perror("_xskt_connect error"); s_error = _xskt_get_last_error(); if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_TIMEOUT, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } } else { _ansc_memset(&ansc_server_addr, 0, sizeof(ansc_server_addr)); ansc_server_addr.sin_family = ANSC_SOCKET_AF_INET; ansc_server_addr.sin_addr.s_addr = pMyObject->PeerAddress.Value; ansc_server_addr.sin_port = _ansc_htons(pMyObject->PeerPort); #ifdef _ANSC_IPV6_COMPATIBLE_ if ( _ansc_connect(pMyObject->Socket, pansc_server_addrinfo->ai_addr, pansc_server_addrinfo->ai_addrlen) != 0 ) #else if ( _ansc_connect(pMyObject->Socket, (ansc_socket_addr*)&ansc_server_addr, sizeof(ansc_server_addr)) != 0 ) #endif { s_error = _ansc_get_last_error(); AnscTrace("!!! Connect error: %d, %s !!!\n", s_error, strerror(s_error)); if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_SOCKET_TIMEOUT, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } } /* * We have gone so far that all socket operations succeeded, we want to allocate a buffer that * is big enough for any incoming message. */ if ( !pMyObject->RecvBuffer && !(pMyObject->Mode & ANSC_SCTO_MODE_FOREIGN_BUFFER) ) { pMyObject->RecvBuffer = AnscAllocateMemory(pMyObject->RecvBufferSize); pMyObject->RecvPacketSize = 0; pMyObject->RecvOffset = 0; if ( !pMyObject->RecvBuffer ) { returnStatus = ANSC_STATUS_RESOURCES; goto EXIT2; } } pMyObject->RecvBytesCount = 0; pMyObject->SendBytesCount = 0; pMyObject->LastRecvAt = AnscGetTickInSeconds(); pMyObject->LastSendAt = AnscGetTickInSeconds(); /* * If the compilation option '_ANSC_SOCKET_TLS_LAYER_' is enabled, we can simply let the ANSC * socket layer to perform the SSL/TLS functionality; otherwise, we need to prepare for doing * SSL/TLS internally. */ if ( pMyObject->Mode & ANSC_SCTO_MODE_TLS_ENABLED ) { #ifdef _ANSC_USE_OPENSSL_ pMyObject->bTlsEnabled = TRUE; if ( !openssl_init(SSL_CLIENT_CALLS) ) { AnscTrace("AnscSctoEngage - openssl_init() failed!\n"); returnStatus = ANSC_STATUS_FAILURE; goto EXIT2; } #else #ifdef _ANSC_SOCKET_TLS_LAYER_ { _ansc_en_usetls(pMyObject->Socket); pMyObject->bTlsEnabled = FALSE; } #else { pMyObject->hTlsScsIf = (pMyObject->hTlsScsIf != NULL)? pMyObject->hTlsScsIf : AnscSocketTlsGetScsIf(); pMyObject->bTlsEnabled = TRUE; } #endif #endif } /* * To save the worker object from having to deal with blocking/non-blocking/async receiving * functions provided by underlying socket layer, we create a separate task to do that. */ returnStatus = pMyObject->SpawnTask3 ( (ANSC_HANDLE)pMyObject, (void* )pMyObject->RecvTask, (ANSC_HANDLE)pMyObject, ANSC_SCTO_RECV_TASK_NAME, USER_DEFAULT_TASK_PRIORITY, 11*USER_DEFAULT_TASK_STACK_SIZE ); #ifdef _ANSC_USE_OPENSSL_ if ( pMyObject->bTlsEnabled ) { SSL *ssl = NULL; ssl = openssl_connect (pMyObject->Socket); if ( !ssl ) { pMyObject->bTlsConnected = FALSE; returnStatus = ANSC_STATUS_FAILURE; //PANSC_SCTO_WORKER_OBJECT pWorker = (PANSC_SCTO_WORKER_OBJECT)pMyObject->hWorker; if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_TLS_ERROR, (ANSC_HANDLE)0L ); } } else { s_error = openssl_validate_certificate (pMyObject->Socket, pMyObject->HostName, ssl, SSL_CLIENT_CALLS); if ( s_error == 0 ) { AnscTrace("AnscSctoEngage - openssl_validate_certificate() failed %p.\n", ssl); //PANSC_SCTO_WORKER_OBJECT pWorker = (PANSC_SCTO_WORKER_OBJECT )pMyObject->hWorker; if ( pMyObject->Mode & ANSC_SCTO_MODE_NO_BSP_NOTIFY_CONN_ERR == 0 ) { pWorker->Notify ( pWorker->hWorkerContext, ANSC_SCTOWO_EVENT_TLS_ERROR, (ANSC_HANDLE)NULL ); } returnStatus = ANSC_STATUS_FAILURE; } pMyObject->hTlsConnection = ssl; pMyObject->bTlsConnected = TRUE; } } #else /* * If SSL/TLS is enabled, we should complete TLS handshake before returning from Engage(). This * behavior allows a single consistent API to used between this object and the worker object. * Since the handshake will take multiple messages to complete, we need to block the current * task until being notified by the TLS module. */ if ( pMyObject->bTlsEnabled && pMyObject->hTlsScsIf ) { pMyObject->bTlsConnected = FALSE; pMyObject->InitTlsClient((ANSC_HANDLE)pMyObject); } #endif if ( returnStatus != ANSC_STATUS_SUCCESS ) { goto EXIT2; } return ANSC_STATUS_SUCCESS; /****************************************************************** GRACEFUL ROLLBACK PROCEDURES AND EXIT DOORS ******************************************************************/ EXIT2: AnscTrace("AnscSctoEngage - failed with status %lu, socket error %d!\n", returnStatus, s_error); if ( pMyObject->Mode & ANSC_SCTO_MODE_XSOCKET ) { _xskt_closesocket((XSKT_SOCKET)pMyObject->Socket); } else { _ansc_closesocket(pMyObject->Socket); } EXIT1: if ( returnStatus != ANSC_STATUS_SUCCESS ) { pMyObject->bActive = FALSE; pMyObject->Reset((ANSC_HANDLE)pMyObject); } return returnStatus; }