Пример #1
0
ANSC_STATUS
AnscBetoSendTask
    (
        ANSC_HANDLE                 hThisObject
    )
{
    ANSC_STATUS                     returnStatus = ANSC_STATUS_SUCCESS;
    PANSC_BROKER_ENGINE_TCP_OBJECT  pMyObject    = (PANSC_BROKER_ENGINE_TCP_OBJECT)hThisObject;
    ansc_fd_set*                    pSendSet1    = (ansc_fd_set*                  )pMyObject->SendSocketSet;
    xskt_fd_set*                    pSendSet2    = (xskt_fd_set*                  )pMyObject->SendSocketSet;
    PANSC_BROKER_SERVER_TCP_OBJECT  pServer      = (PANSC_BROKER_SERVER_TCP_OBJECT)pMyObject->hBrokerServer;
    PANSC_BSTO_WORKER_OBJECT        pWorker      = (PANSC_BSTO_WORKER_OBJECT      )pServer->hWorker;
    PANSC_BETO_PACKET_OBJECT        pPacket      = NULL;
    PANSC_BROKER_SOCKET_TCP_OBJECT  pSocket      = NULL;
    PSINGLE_LINK_ENTRY              pSLinkEntry  = NULL;
    BOOL                            bSendable    = FALSE;
    int                             s_result     = 0;
    int                             s_error      = 0;

    AnscTrace("AnscBetoSendTask is activated ...!\n");

    /*
     * As a scalable server implemention, we shall accept as many incoming client connections as
     * possible and can only be limited by the system resources. Once the listening socket becomes
     * readable, which means an incoming connection attempt has arrived. We create a new socket
     * object and associate it with the client. This is a repeated process until the socket owner
     * closes the socket.
     */
    while ( pMyObject->bStarted )
    {
        AnscAcquireLock(&pMyObject->PacketQueueLock);
        pSLinkEntry = AnscQueuePopEntry(&pMyObject->PacketQueue);
        AnscReleaseLock(&pMyObject->PacketQueueLock);

        if ( !pSLinkEntry )
        {
            continue;
        }
        else
        {
            pPacket = ACCESS_ANSC_BETO_PACKET_OBJECT(pSLinkEntry);
            pSocket = (PANSC_BROKER_SOCKET_TCP_OBJECT)pPacket->hSocket;
        }

	#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
        AnscAcquireLock(&pMyObject->SendSocketSetLock);
        bSendable = (pServer->Mode & ANSC_BSTO_MODE_XSOCKET)? XSKT_SOCKET_FD_ISSET(pSocket->Socket, pSendSet2) : ANSC_SOCKET_FD_ISSET(pSocket->Socket, pSendSet1);
        AnscReleaseLock(&pMyObject->SendSocketSetLock);

        if ( !bSendable )
        {
            returnStatus =
                pWorker->SendComplete
                    (
                        pWorker->hWorkerContext,
                        (ANSC_HANDLE)pSocket,
                        pPacket->hWorkerReserved,
                        ANSC_STATUS_FAILURE
                    );

            AnscFreeMemory(pPacket);

            continue;
        }
	#endif

        if ( pServer->Mode & ANSC_BSTO_MODE_XSOCKET )
        {
            s_result = _xskt_send(((XSKT_SOCKET)pSocket->Socket), pPacket->PacketBuffer, (int)pPacket->PacketSize, 0);
        }
        else
        {
            s_result = _ansc_send(pSocket->Socket, pPacket->PacketBuffer, (int)pPacket->PacketSize, 0);
        }

        if ( ((s_result == XSKT_SOCKET_ERROR) &&  (pServer->Mode & ANSC_BSTO_MODE_XSOCKET)) ||
             ((s_result == ANSC_SOCKET_ERROR) && !(pServer->Mode & ANSC_BSTO_MODE_XSOCKET)) )
        {
            s_error = (pServer->Mode & ANSC_BSTO_MODE_XSOCKET)? _xskt_get_last_error() : _ansc_get_last_error();

            returnStatus =
                pWorker->SendComplete
                    (
                        pWorker->hWorkerContext,
                        (ANSC_HANDLE)pSocket,
                        pPacket->hWorkerReserved,
                        ANSC_STATUS_FAILURE
                    );

            if ( pServer->Mode & ANSC_BSTO_MODE_AUTO_CLOSE )
            {
                pMyObject->DelSocket((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket);
            }
        }
        else
        {
            returnStatus =
                pWorker->SendComplete
                    (
                        pWorker->hWorkerContext,
                        (ANSC_HANDLE)pSocket,
                        pPacket->hWorkerReserved,
                        ANSC_STATUS_SUCCESS
                    );

            pSocket->SendBytesCount += pPacket->PacketSize;
            pSocket->LastSendAt      = AnscGetTickInSeconds();
        }
    }

    AnscSetEvent(&pMyObject->SendEvent);

    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;
}
ANSC_STATUS
AnscDsuoAcceptTask
    (
        ANSC_HANDLE                 hThisObject
    )
{
    ANSC_STATUS                     returnStatus  = ANSC_STATUS_SUCCESS;
    PANSC_DAEMON_SERVER_UDP_OBJECT  pMyObject     = (PANSC_DAEMON_SERVER_UDP_OBJECT)hThisObject;
    PANSC_DSUO_WORKER_OBJECT        pWorker       = (PANSC_DSUO_WORKER_OBJECT      )pMyObject->hWorker;
    PANSC_DAEMON_ENGINE_UDP_OBJECT  pCurEngine    = NULL;
    PANSC_DSUO_PACKET_OBJECT        pNewPacket    = NULL;
    int                             s_result      = 0;
    int                             s_error       = 0;
    char*                           recv_buffer   = NULL;
    int                             recv_size     = 0;
    ansc_fd_set                     read_fd_set;
    xskt_fd_set                     read_fd_set2;
    ansc_timeval                    timeval;
    xskt_timeval                    timeval2;
    ansc_socket_addr_in             client_addr;
    xskt_socket_addr_in             client_addr2;
    int                             addrlen;

    AnscTrace("AnscDsuoAcceptTask is activated ...!\n");

    /*
     * As a scalable server implemention, we shall accept as many incoming client connections as
     * possible and can only be limited by the system resources. Once the listening socket becomes
     * readable, which means an incoming connection attempt has arrived. We create a new socket
     * object and associate it with the client. This is a repeated process until the socket owner
     * closes the socket.
     */
    while ( pMyObject->bActive )
    {
        ANSC_COMMIT_TASK();
        
        /*
         * Since the original bsd compatible socket api doesn't support asynchronous operation, the
         * nonblocking status polling is the best we can get. As a matter of fact, the current unix
         * and linux actually still don't support asynchronous notification on any socket operation.
         */

        /*
         * Since only one socket is included in the fd_set, we only distinguish the result between
         * one and non-one values. If error is detected, we shall close the socket and notify the
         * socket owner immediately.
         */
        if ( pMyObject->Mode & ANSC_DSUO_MODE_XSOCKET )
        {
            XSKT_SOCKET_FD_ZERO(&read_fd_set2);
            XSKT_SOCKET_FD_SET ((XSKT_SOCKET)pMyObject->Socket, &read_fd_set2);
            timeval2.tv_sec  = (ANSC_DSUO_POLL_INTERVAL_MS / 1000);          /* number of seconds      */
            timeval2.tv_usec = (ANSC_DSUO_POLL_INTERVAL_MS % 1000) * 1000;   /* number of microseconds */

            s_result = _xskt_select(pMyObject->Socket + 1, &read_fd_set2, NULL, NULL, &timeval2);
        }
        else
        {
            ANSC_SOCKET_FD_ZERO(&read_fd_set);
            ANSC_SOCKET_FD_SET (pMyObject->Socket, &read_fd_set);
            timeval.tv_sec  = (ANSC_DSUO_POLL_INTERVAL_MS / 1000);          /* number of seconds      */
            timeval.tv_usec = (ANSC_DSUO_POLL_INTERVAL_MS % 1000) * 1000;   /* number of microseconds */

            s_result = _ansc_select(pMyObject->Socket + 1, &read_fd_set, NULL, NULL, &timeval);
        }

        if ( s_result == 0 )
        {
            continue;
        }
        else if ( s_result == ANSC_SOCKET_ERROR )
        {
            s_error = _ansc_get_last_error();

            continue;
        }

        /*
         * According to de facto standards of bsd compatible socket api, if the socket is currently
         * in the listen state, it will be marked as readable if an incoming connection request has
         * been received such that an accept is guaranteed to complete without blocking.
         */

        pNewPacket =
            (PANSC_DSUO_PACKET_OBJECT)pMyObject->AcquirePacket
                (
                    (ANSC_HANDLE)pMyObject
                );

        if ( !pNewPacket )
        {
            continue;
        }
        else
        {
            recv_buffer = pNewPacket->RecvBuffer;
            recv_size   = pNewPacket->RecvBufferSize;
        }

        if ( pMyObject->Mode & ANSC_DSUO_MODE_XSOCKET )
        {
            client_addr2.sin_family                                 = ANSC_SOCKET_AF_INET;
            ((pansc_socket_addr_in)&client_addr2)->sin_addr.s_addr  = 0;
            client_addr2.sin_port                                   = _xskt_htons(pMyObject->HostPort);
            addrlen                                                 = sizeof(client_addr2);
            s_result = _xskt_recvfrom(pMyObject->Socket, recv_buffer, recv_size, 0, (xskt_socket_addr*)&client_addr2, &addrlen);
        }
        else
        {
            client_addr.sin_family      = ANSC_SOCKET_AF_INET;
            client_addr.sin_addr.s_addr = 0;
            client_addr.sin_port        = _ansc_htons(pMyObject->HostPort);
            addrlen                     = sizeof(client_addr);
            s_result = _ansc_recvfrom(pMyObject->Socket, recv_buffer, recv_size, 0, (ansc_socket_addr*)&client_addr, &addrlen);
        }

        if ( s_result == ANSC_SOCKET_ERROR )
        {
            s_error = _ansc_get_last_error();

            returnStatus =
                pMyObject->ReleasePacket
                    (
                        (ANSC_HANDLE)pMyObject,
                        (ANSC_HANDLE)pNewPacket
                    );

            continue;
        }
        else if ( !pMyObject->bActive )
        {
            returnStatus =
                pMyObject->ReleasePacket
                    (
                        (ANSC_HANDLE)pMyObject,
                        (ANSC_HANDLE)pNewPacket
                    );

            break;
        }
        else
        {
            recv_size = s_result;
        }

        if ( pMyObject->Mode & ANSC_DSUO_MODE_XSOCKET )
        {
            pNewPacket->PeerAddress.Value = ((pansc_socket_addr_in)&client_addr2)->sin_addr.s_addr;
            pNewPacket->PeerPort          = _ansc_ntohs(client_addr2.sin_port);
        }
        else
        {
            pNewPacket->PeerPort          = _ansc_ntohs(client_addr.sin_port);
            pNewPacket->PeerAddress.Value = client_addr.sin_addr.s_addr;
        }
        pNewPacket->RecvPacketSize    = (ULONG)recv_size;
        pNewPacket->RecvAt            = AnscGetTickInSeconds();

        /*
         * We have to assign an engine object to this new packet object. The assignment is done by
         * address-hashing. However, we need to make sure that the assigned engine object is not
         * over-loaded. If it is, there're nothing we can do except throwing the packet away.
         */
        pCurEngine =
            (PANSC_DAEMON_ENGINE_UDP_OBJECT)pMyObject->AssignEngine
                (
                    (ANSC_HANDLE)pMyObject,
                    (ANSC_HANDLE)pNewPacket
                );

        if ( !pCurEngine )
        {
            returnStatus =
                pMyObject->ReleasePacket
                    (
                        (ANSC_HANDLE)pMyObject,
                        (ANSC_HANDLE)pNewPacket
                    );

            continue;
        }
        else
        {
            returnStatus =
                pCurEngine->AddPacket
                    (
                        (ANSC_HANDLE)pCurEngine,
                        (ANSC_HANDLE)pNewPacket
                    );
        }

        if ( returnStatus != ANSC_STATUS_SUCCESS )
        {
            returnStatus =
                pMyObject->ReleasePacket
                    (
                        (ANSC_HANDLE)pMyObject,
                        (ANSC_HANDLE)pNewPacket
                    );
        }
    }

    AnscSetEvent(&pMyObject->AcceptEvent);

    return  ANSC_STATUS_SUCCESS;
}
ANSC_STATUS
AnscDstoEngage
    (
        ANSC_HANDLE                 hThisObject
    )
{
    ANSC_STATUS                     returnStatus = ANSC_STATUS_SUCCESS;
    PANSC_DAEMON_SERVER_TCP_OBJECT  pMyObject    = (PANSC_DAEMON_SERVER_TCP_OBJECT)hThisObject;
    PANSC_DSTO_WORKER_OBJECT        pWorker      = (PANSC_DSTO_WORKER_OBJECT      )pMyObject->hWorker;
    int                             s_result     = 0;
#ifdef _ANSC_IPV6_COMPATIBLE_
    ansc_addrinfo                   ansc_hints           = {0};
    ansc_addrinfo*                  pansc_local_addrinfo = NULL;
    xskt_addrinfo                   xskt_hints           = {0};
    xskt_addrinfo*                  pxskt_local_addrinfo = NULL;
    USHORT                          usPort               = 0;
    char                            port[6]              = {0};
#else
    /*RDKB-6151, CID-24487,24794; initializing variable before use*/
    ansc_socket_addr_in             local_addr1 = {0};
    xskt_socket_addr_in             local_addr2 = {0};
#endif

    if ( pMyObject->bActive )
    {
        return  ANSC_STATUS_SUCCESS;
    }
    else if ( !pWorker )
    {
        return  ANSC_STATUS_UNAPPLICABLE;
    }
    else
    {
        pWorker->Init(pWorker->hWorkerContext);

        pMyObject->StartTime = AnscGetTickInSecondsAbs();
        pMyObject->bActive   = TRUE;
    }

    /*
     * 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_DSTO_MODE_XSOCKET )
    {
        AnscStartupXsocketWrapper((ANSC_HANDLE)pMyObject);
    }
    else
    {
        AnscStartupSocketWrapper((ANSC_HANDLE)pMyObject);
    }
    
#ifdef _ANSC_IPV6_COMPATIBLE_

    if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
        xskt_hints.ai_family   = AF_UNSPEC;
        xskt_hints.ai_socktype = XSKT_SOCKET_STREAM;
        xskt_hints.ai_flags    = AI_PASSIVE | AI_ADDRCONFIG;

        usPort = pMyObject->GetHostPort((ANSC_HANDLE)pMyObject);
        _ansc_sprintf(port, "%d", usPort);
        CcspTraceInfo(("!!! Host Name: %s, Host Port: %s !!!\n", pMyObject->HostName, port));

        if ( _xskt_getaddrinfo
                (
                    pMyObject->HostName[0] ? pMyObject->HostName : "::", 
                    port,
                    &xskt_hints,
                    &pxskt_local_addrinfo
                ) 
            )
        {
            CcspTraceError(("!!! error 1 !!!\n"));

            returnStatus = ANSC_STATUS_FAILURE;
            
            goto  EXIT1;
        }
        
        pMyObject->pHostAddr2 = pxskt_local_addrinfo;
    }
    else
    {
        ansc_hints.ai_family   = AF_UNSPEC;
        ansc_hints.ai_socktype = ANSC_SOCKET_STREAM;
        ansc_hints.ai_flags    = AI_PASSIVE | AI_ADDRCONFIG;

        usPort = pMyObject->GetHostPort((ANSC_HANDLE)pMyObject);
        _ansc_sprintf(port, "%d", usPort);
        CcspTraceInfo(("!!! Host Name: %s, Host Port: %s !!!\n", pMyObject->HostName, port));

        if ( _ansc_getaddrinfo
                (
                    pMyObject->HostName[0] ? pMyObject->HostName : "::",
                    port,
                    &ansc_hints,
                    &pansc_local_addrinfo
                ) 
            )
        {
            returnStatus = ANSC_STATUS_FAILURE;

            goto  EXIT1;
        }
        
        pMyObject->pHostAddr1 = pansc_local_addrinfo;
    }

#endif

    /*
     * To engage the Tcp Daemon, we need to perform following acts in the respective order:
     *
     *      (1) create the os-dependent socket
     *      (2) manufacture and start all the engines objects
     *      (3) manufacture the global socket object pool
     *      (4) bind to the socket and listen on it
     */
    if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
#ifdef _ANSC_IPV6_COMPATIBLE_
        pMyObject->Socket = _xskt_socket(pxskt_local_addrinfo->ai_family, pxskt_local_addrinfo->ai_socktype, 0);
#else
        pMyObject->Socket = _xskt_socket(XSKT_SOCKET_AF_INET, XSKT_SOCKET_STREAM, 0);
#endif
    }
    else
    {
#ifdef _ANSC_IPV6_COMPATIBLE_
        pMyObject->Socket = _ansc_socket(pansc_local_addrinfo->ai_family, pansc_local_addrinfo->ai_socktype, 0);
#else
        pMyObject->Socket = _ansc_socket(ANSC_SOCKET_AF_INET, ANSC_SOCKET_STREAM, 0);
#endif
    }

    if ( ((pMyObject->Socket == XSKT_SOCKET_INVALID_SOCKET) &&  (pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET)) ||
         ((pMyObject->Socket == ANSC_SOCKET_INVALID_SOCKET) && !(pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET)) )
    {
        returnStatus = ANSC_STATUS_FAILURE;

        goto  EXIT1;
    }

    _ansc_en_reuseaddr(pMyObject->Socket);

#ifndef _ANSC_IPV6_COMPATIBLE_
    if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
        local_addr2.sin_family = XSKT_SOCKET_AF_INET;
        local_addr2.sin_port   = _xskt_htons(pMyObject->HostPort);

        if ( pMyObject->HostAddress.Value == 0 )
        {
            ((pansc_socket_addr_in)&local_addr2)->sin_addr.s_addr = XSKT_SOCKET_ANY_ADDRESS;
        }
        else
        {
            ((pansc_socket_addr_in)&local_addr2)->sin_addr.s_addr = pMyObject->HostAddress.Value;
        }
    }
    else
    {
        local_addr1.sin_family = ANSC_SOCKET_AF_INET;
        local_addr1.sin_port   = _ansc_htons(pMyObject->HostPort);

        if ( pMyObject->HostAddress.Value == 0 )
        {
            local_addr1.sin_addr.s_addr = ANSC_SOCKET_ANY_ADDRESS;
        }
        else
        {
            local_addr1.sin_addr.s_addr = pMyObject->HostAddress.Value;
        }
    }
#endif

#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
    if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
#ifdef _ANSC_IPV6_COMPATIBLE_
        s_result = _xskt_bind(pMyObject->Socket, pxskt_local_addrinfo->ai_addr, pxskt_local_addrinfo->ai_addrlen);
#else
        AnscTrace("AnscDstoEngage -- the address is 0x%lX:%d, familty %d.\n", _ansc_ntohl(local_addr2.sin_addr.s_addr), _ansc_ntohs(local_addr2.sin_port), local_addr2.sin_family);
        s_result = _xskt_bind(pMyObject->Socket, (xskt_socket_addr*)&local_addr2, sizeof(local_addr2));
#endif
    }
    else
    {
#ifdef _ANSC_IPV6_COMPATIBLE_
        s_result = _ansc_bind(pMyObject->Socket, pansc_local_addrinfo->ai_addr, pansc_local_addrinfo->ai_addrlen);
#else
        s_result = _ansc_bind(pMyObject->Socket, (ansc_socket_addr*)&local_addr1, sizeof(local_addr1));
#endif
    }
#else
	if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
        while ( _xskt_bind(pMyObject->Socket, (ansc_socket_addr*)&local_addr2, sizeof(local_addr2)) != 0 )
        {
            AnscTrace
				(
					"AnscDstoEngage -- failure to bind try again !socket %d family %d port %d address %X \n",
					pMyObject->Socket,
					local_addr2.sin_family,
                    local_addr2.sin_port,
					((pansc_socket_addr_in)&local_addr2)->sin_addr.s_addr
				);

            AnscSleep(10);
        }
    }
    else
    {
        while ( _ansc_bind(pMyObject->Socket, (ansc_socket_addr*)&local_addr1, sizeof(local_addr1)) != 0 )
        {
            AnscTrace
				(
					"AnscDstoEngage -- failure to bind try again !socket %d family %d port %d address %X \n",
					pMyObject->Socket,
					local_addr1.sin_family,
                    local_addr1.sin_port,
					local_addr1.sin_addr.s_addr
				);

            AnscSleep(10);
        }
    }
#endif

    if ( s_result != 0 )
    {
		AnscTrace
            (
                "AnscDstoEngage -- failed to bind to the socket, error code is %d!!!\n",
                (pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET) ? _xskt_get_last_error() : _ansc_get_last_error()
            );

        returnStatus = ANSC_STATUS_FAILURE;

        goto  EXIT2;
    }

    pMyObject->ManufactureEnginePool((ANSC_HANDLE)pMyObject);
    pMyObject->ManufactureSocketPool((ANSC_HANDLE)pMyObject);
    pMyObject->StartEngines         ((ANSC_HANDLE)pMyObject);

    if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
        s_result = _xskt_listen(pMyObject->Socket, ANSC_SOCKET_BACKLOG_VALUE);
    }
    else
    {
        s_result = _ansc_listen(pMyObject->Socket, ANSC_SOCKET_BACKLOG_VALUE);
    }

    if ( s_result != 0 )
    {
		AnscTrace("AnscDstoEngage -- failed to listen on the socket!\n");

        returnStatus = ANSC_STATUS_FAILURE;

        goto  EXIT2;
    }

    /*
     * 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_DSTO_MODE_TLS_ENABLED )
    {
#ifdef _ANSC_USE_OPENSSL_
        pMyObject->bTlsEnabled = TRUE;
        if ( !openssl_init(SSL_SERVER_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;
            pMyObject->bTlsReqCert = (pMyObject->Mode & ANSC_DSTO_MODE_TLS_REQ_CERT);
        }
        #endif
#endif
    }

    AnscResetEvent(&pMyObject->AcceptEvent);
    returnStatus =
        pMyObject->SpawnTask3
            (
                (ANSC_HANDLE)pMyObject,
                (void*      )pMyObject->AcceptTask,
                (ANSC_HANDLE)pMyObject,
                ANSC_DSTO_ACCEPT_TASK_NAME,
                USER_DEFAULT_TASK_PRIORITY,
                2*USER_DEFAULT_TASK_STACK_SIZE

            );

    return  ANSC_STATUS_SUCCESS;


    /******************************************************************
                GRACEFUL ROLLBACK PROCEDURES AND EXIT DOORS
    ******************************************************************/

EXIT2:

    if ( pMyObject->Mode & ANSC_DSTO_MODE_XSOCKET )
    {
        _xskt_closesocket(pMyObject->Socket);
    }
    else
    {
        _ansc_closesocket(pMyObject->Socket);
    }

EXIT1:

    if ( returnStatus != ANSC_STATUS_SUCCESS )
    {
        pMyObject->bActive = FALSE;
    }

    return  returnStatus;
}
Пример #5
0
ANSC_STATUS
AnscDetoRecvTask
    (
        ANSC_HANDLE                 hThisObject
    )
{
    ANSC_STATUS                     returnStatus  = ANSC_STATUS_SUCCESS;
    PANSC_DAEMON_ENGINE_TCP_OBJECT  pMyObject     = (PANSC_DAEMON_ENGINE_TCP_OBJECT)hThisObject;
    PANSC_DAEMON_SERVER_TCP_OBJECT  pServer       = (PANSC_DAEMON_SERVER_TCP_OBJECT)pMyObject->hDaemonServer;
    PANSC_DSTO_WORKER_OBJECT        pWorker       = (PANSC_DSTO_WORKER_OBJECT      )pServer->hWorker;
#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
    ansc_fd_set*                    pRecvSet1     = (ansc_fd_set*                  )pMyObject->RecvSocketSet;
    xskt_fd_set*                    pRecvSet2     = (xskt_fd_set*                  )pMyObject->RecvSocketSet;
#endif
    PANSC_DAEMON_SOCKET_TCP_OBJECT  pSocket       = NULL;
    ULONG                           ulLastCleanAt = AnscGetTickInSecondsAbs();
    ANSC_SOCKET                     s_socket      = ANSC_SOCKET_INVALID_SOCKET;
    int                             s_result      = 0;
    int                             s_result_excp = 0;
    int                             s_error       = 0;
    int                             i             = 0;
#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
    ansc_fd_set*                    read_fd_set1  = NULL;
    xskt_fd_set*                    read_fd_set2  = NULL;
    ansc_fd_set*                    excp_fd_set1  = NULL;
    xskt_fd_set*                    excp_fd_set2  = NULL;
    ansc_timeval                    timeval1;
    xskt_timeval                    timeval2;
#endif

    AnscTrace("AnscDetoRecvTask is activated ...!\n");

#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
    read_fd_set1 = (ansc_fd_set*)AnscAllocateMemory(sizeof(ansc_fd_set));
    read_fd_set2 = (xskt_fd_set*)AnscAllocateMemory(sizeof(xskt_fd_set));
    excp_fd_set1 = (ansc_fd_set*)AnscAllocateMemory(sizeof(ansc_fd_set));
    excp_fd_set2 = (xskt_fd_set*)AnscAllocateMemory(sizeof(xskt_fd_set));

    if ( !read_fd_set1 || !read_fd_set2 || !excp_fd_set1 || !excp_fd_set2 )
    {
        goto  EXIT1;
    }
#endif

    /*
     * As a scalable server implemention, we shall accept as many incoming client connections as
     * possible and can only be limited by the system resources. Once the listening socket becomes
     * readable, which means an incoming connection attempt has arrived. We create a new socket
     * object and associate it with the client. This is a repeated process until the socket owner
     * closes the socket.
     */
    while ( pMyObject->bStarted )
    {
        ANSC_COMMIT_TASK();

        /*
         * To avoid letting the old half-dead sockets hogging up the system resource, we need to
         * periodically invoke the cleaning routine. The default interval is 10 seconds, and the
         * idle timeout value is 90 seconds.
         */
	#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
        if ( pMyObject->bCleaningDemanded )
	#else
		if ( FALSE ) /*if ( pMyObject->bCleaningDemanded )*/
	#endif
        {
            pMyObject->Clean((ANSC_HANDLE)pMyObject);

            ulLastCleanAt                = AnscGetTickInSecondsAbs();
            pMyObject->bCleaningDemanded = FALSE;
        }
        else if ( (AnscGetTickInSecondsAbs() - ulLastCleanAt) >= ANSC_DETO_CLEAN_TASK_INTERVAL )
        {
            pMyObject->Clean((ANSC_HANDLE)pMyObject);

            ulLastCleanAt                = AnscGetTickInSecondsAbs();
            pMyObject->bCleaningDemanded = FALSE;
        }

        /*
         * Since the original bsd compatible socket api doesn't support asynchronous operation, the
         * nonblocking status polling is the best we can get. As a matter of fact, the current unix
         * and linux actually still don't support asynchronous notification on any socket operation.
         */
    #if defined(_ANSC_KERNEL) && defined(_ANSC_LINUX)
        if ( !pMyObject->CurSocketCount)
        {
            if ( pServer->Mode & ANSC_DSTO_MODE_EVENT_SYNC )
            {
                AnscWaitEvent (&pMyObject->NewSocketEvent, ANSC_DETO_WAIT_EVENT_INTERVAL);
                AnscResetEvent(&pMyObject->NewSocketEvent);

                if (!pMyObject->CurSocketCount)
                {
                    AnscTaskRelinquish();

                    continue;
                }
            }
            else
            {
                AnscSleep(ANSC_DETO_TASK_BREAK_INTERVAL);

                continue;
            }
        }
    #else
        if ( pServer->Mode & ANSC_DSTO_MODE_XSOCKET )
        {
            AnscAcquireLock(&pMyObject->RecvSocketSetLock);
            *read_fd_set2 = *pRecvSet2;
            AnscReleaseLock(&pMyObject->RecvSocketSetLock);
        }
        else
        {
            AnscAcquireLock(&pMyObject->RecvSocketSetLock);
            *read_fd_set1 = *pRecvSet1;
            AnscReleaseLock(&pMyObject->RecvSocketSetLock);
        }

        if ( ( (pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && XSKT_SOCKET_FD_ISNUL(read_fd_set2)) ||
             (!(pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && ANSC_SOCKET_FD_ISNUL(read_fd_set1)) )
        {
            if ( pServer->Mode & ANSC_DSTO_MODE_EVENT_SYNC )
            {
                AnscWaitEvent (&pMyObject->NewSocketEvent, ANSC_DETO_WAIT_EVENT_INTERVAL);
                AnscResetEvent(&pMyObject->NewSocketEvent);

                if ( pServer->Mode & ANSC_DSTO_MODE_XSOCKET )
                {
                    AnscAcquireLock(&pMyObject->RecvSocketSetLock);
                    *read_fd_set2 = *pRecvSet2;
                    AnscReleaseLock(&pMyObject->RecvSocketSetLock);
                }
                else
                {
                    AnscAcquireLock(&pMyObject->RecvSocketSetLock);
                    *read_fd_set1 = *pRecvSet1;
                    AnscReleaseLock(&pMyObject->RecvSocketSetLock);
                }

                if ( ( (pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && XSKT_SOCKET_FD_ISNUL(read_fd_set2)) ||
                     (!(pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && ANSC_SOCKET_FD_ISNUL(read_fd_set1)) )
                {
                    AnscTaskRelinquish();

                    continue;
                }
            }
            else
            {
                AnscSleep(ANSC_DETO_TASK_BREAK_INTERVAL);

                continue;
            }
        }

        if ( pServer->Mode & ANSC_DSTO_MODE_XSOCKET )
        {
            timeval2.tv_sec  = (ANSC_DETO_POLL_INTERVAL_MS / 1000);          /* number of seconds      */
            timeval2.tv_usec = (ANSC_DETO_POLL_INTERVAL_MS % 1000) * 1000;   /* number of microseconds */
        }
        else
        {
            timeval1.tv_sec  = (ANSC_DETO_POLL_INTERVAL_MS / 1000);          /* number of seconds      */
            timeval1.tv_usec = (ANSC_DETO_POLL_INTERVAL_MS % 1000) * 1000;   /* number of microseconds */
        }

        /*
         * The _ansc_select() function returns the total number of socket handles that are ready
         * and contained in the fd_set structures, zero if the time limit expired, or SOCKET_ERROR
         * if an error occurred. Upon return, the structures are updated to reflect the subset of
         * these sockets that meet the specified condition.
         */
        if ( pServer->Mode & ANSC_DSTO_MODE_XSOCKET )
        {
            s_result = _xskt_select(XSKT_SOCKET_FD_SETSIZE, read_fd_set2, NULL, NULL, &timeval2);
        }
        else
        {
            s_result = _ansc_select(ANSC_SOCKET_FD_SETSIZE, read_fd_set1, NULL, NULL, &timeval1);
        }

        if ( s_result == 0 )
        {
            continue;
        }
        else if ( ( (pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && (s_result == XSKT_SOCKET_ERROR)) ||
                  (!(pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && (s_result == ANSC_SOCKET_ERROR)) )
        {
            s_error = (pServer->Mode & ANSC_DSTO_MODE_XSOCKET)? _xskt_get_last_error() : _ansc_get_last_error();

            /*
             * Previously we simply reset everything when _ansc_select() fails, which is not a good
             * solution: we shall notify the worker module and gracefully shutdown the socket(s)
             * that caused the error.
             */
            /*
            pMyObject->Reset((ANSC_HANDLE)pMyObject);
            */
            pMyObject->ExpAllSockets((ANSC_HANDLE)pMyObject);

            continue;
        }
        else if ( !pMyObject->bStarted )
        {
            break;
        }
	#endif

        /*
         * If there're multiple sockets are receiving data, we loop through the returned fd_set
         * structure and process them one-by-one. However, we have a slight problem: the resulted
         * fd_set consists of only the native socket handles, not the associated Socket Objects.
         * We have to first retrieve the peer's IP address from the socket, and use it to find
         * the associated socket object.
         */
	#if defined(_ANSC_KERNEL) && defined(_ANSC_LINUX)
        if (TRUE)
        {
            int                             i; 
            PSINGLE_LINK_ENTRY              pSLinkEntry;

            for ( i = 0; i < ANSC_DETO_SOCKET_TABLE_SIZE ; i++)
            {
                if (!AnscSListQueryDepth(&pMyObject->SocketTable[i]))
                {
                    continue;
                }

                AnscAcquireLock(&pMyObject->SocketTableLock);

                pSLinkEntry = AnscSListGetFirstEntry(&pMyObject->SocketTable[i]);

                AnscReleaseLock(&pMyObject->SocketTableLock);

                while ( pSLinkEntry )
                {
                    pSocket     = ACCESS_ANSC_DAEMON_SOCKET_TCP_OBJECT(pSLinkEntry);
                    pSLinkEntry = AnscSListGetNextEntry(pSLinkEntry);

					if ( pSocket->bTlsEnabled )
					{
                        pMyObject->bBusy = TRUE;

                        returnStatus =
                            pMyObject->Recv2
                                (
                                    (ANSC_HANDLE)pMyObject,
                                    (ANSC_HANDLE)pSocket
                                );

                        pMyObject->bBusy = FALSE;
					}
                    else
                    {
                        pMyObject->bBusy = TRUE;

						returnStatus =
							pMyObject->Recv
								(
									(ANSC_HANDLE)pMyObject,
									(ANSC_HANDLE)pSocket
								);

                        pMyObject->bBusy = FALSE;
                    }
                }

                if ( !pMyObject->bStarted )
                {
                    break;
                }
            }

            AnscSleep(10);
        }
	#else
        for ( i = 0; i < s_result; i++ )
        {
            if ( pServer->Mode & ANSC_DSTO_MODE_XSOCKET )
            {
                XSKT_SOCKET_FD_GET(read_fd_set2, s_socket, (ULONG)i);
            }
            else
            {
                ANSC_SOCKET_FD_GET(read_fd_set1, s_socket, (ULONG)i);
            }

            if ( ( (pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && (s_socket == XSKT_SOCKET_INVALID_SOCKET)) ||
                 (!(pServer->Mode & ANSC_DSTO_MODE_XSOCKET) && (s_socket == ANSC_SOCKET_INVALID_SOCKET)) )
            {
                break;
            }
            else
            {
                pSocket =
                    (PANSC_DAEMON_SOCKET_TCP_OBJECT)pMyObject->GetSocketByOsocket
                        (
                            (ANSC_HANDLE)pMyObject,
                            s_socket
                        );
                /*
                 * We should make sure this socket is still valid before proceeding with the socket
                 * receive operations. For example, the peer may have already closed or reset the
                 * TCP connection while we're serving the previous socket request.
                 *
                 * 10/06/04 - It's believed this modification is slowing down the GUI and we're not
                 * seeing tangible evidence that GUI responsivenss has been improved. So we disable
                 * it for now.
                 */
                /*
                if ( pServer->Mode & ANSC_DSTO_MODE_XSOCKET )
                {
                    XSKT_SOCKET_FD_ZERO(excp_fd_set2);
                    XSKT_SOCKET_FD_SET ((XSKT_SOCKET)s_socket, excp_fd_set2);

                    timeval2.tv_sec  = 0;
                    timeval2.tv_usec = 0;

                    s_result_excp = _xskt_select(XSKT_SOCKET_FD_SETSIZE, NULL, NULL, excp_fd_set2, &timeval2);
                }
                else
                {
                    ANSC_SOCKET_FD_ZERO(excp_fd_set1);
                    ANSC_SOCKET_FD_SET (s_socket, excp_fd_set1);

                    timeval1.tv_sec  = 0;
                    timeval1.tv_usec = 0;

                    s_result_excp = _ansc_select(ANSC_SOCKET_FD_SETSIZE, NULL, NULL, excp_fd_set1, &timeval1);
                }
                */
            }

            /*
            if ( ((s_result_excp == 1                )                                             ) ||
                 ((s_result_excp == XSKT_SOCKET_ERROR) &&  (pServer->Mode & ANSC_DSTO_MODE_XSOCKET)) ||
                 ((s_result_excp == ANSC_SOCKET_ERROR) && !(pServer->Mode & ANSC_DSTO_MODE_XSOCKET)) )
            {
                if ( TRUE )
                {
                    pSocket->bBroken = TRUE;

                    pMyObject->EnableRecv((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket, FALSE);
                    pMyObject->EnableSend((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket, FALSE);
                }

                if ( pSocket->bTlsEnabled )
                {
                    if ( pSocket->bTlsEnabled && pSocket->bTlsConnected && !pSocket->bTlsInitializing )
                    {
                        returnStatus =
                            pWorker->Notify
                                (
                                    pWorker->hWorkerContext,
                                    (ANSC_HANDLE)pSocket,
                                    ANSC_DSTOWO_EVENT_SOCKET_ERROR,
                                    (ANSC_HANDLE)NULL
                                );
                    }
                    else
                    {
                        AnscSetEvent(&pSocket->TlsConnEvent);
                    }
                }
                else
                {
                    returnStatus =
                        pWorker->Notify
                            (
                                pWorker->hWorkerContext,
                                (ANSC_HANDLE)pSocket,
                                ANSC_DSTOWO_EVENT_SOCKET_ERROR,
                                (ANSC_HANDLE)NULL
                            );
                }

                if ( pServer->Mode & ANSC_DSTO_MODE_AUTO_CLOSE )
                {
                    pMyObject->DelSocket((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket);
                }

                pMyObject->TrcCount++;

                continue;
            }
            else
            {
                pSocket =
                    (PANSC_DAEMON_SOCKET_TCP_OBJECT)pMyObject->GetSocketByOsocket
                        (
                            (ANSC_HANDLE)pMyObject,
                            s_socket
                        );
            }
            */

            if ( !pSocket )
            {
                continue;
            }
            else if ( pSocket->bTlsEnabled )
            {
#ifdef _ANSC_USE_OPENSSL_
                pMyObject->bBusy = TRUE;

                returnStatus =
                    pMyObject->Recv
                        (
                            (ANSC_HANDLE)pMyObject,
                            (ANSC_HANDLE)pSocket
                        );

                pMyObject->bBusy = FALSE;
#else
                pMyObject->bBusy = TRUE;

                returnStatus =
                    pMyObject->Recv2
                        (
                            (ANSC_HANDLE)pMyObject,
                            (ANSC_HANDLE)pSocket
                        );

                pMyObject->bBusy = FALSE;
#endif
            }
            else
            {
                pMyObject->bBusy = TRUE;

                returnStatus =
                    pMyObject->Recv
                        (
                            (ANSC_HANDLE)pMyObject,
                            (ANSC_HANDLE)pSocket
                        );

                pMyObject->bBusy = FALSE;
            }

            /*
             * Check whether 'bToBeCleaned' flag is set for this socket: if it is, we should close
             * this socket right away; otherwise, we continue the processing. WARNING!!! This new
             * change seems to incur instability in SLAP, we have to roll back to the initial
             * approach.
             */
            /*
            if ( pSocket->bToBeCleaned )
            {
                returnStatus =
                    pMyObject->DelSocket
                        (
                            (ANSC_HANDLE)pMyObject,
                            (ANSC_HANDLE)pSocket
                        );
            }
            */

            if ( !pMyObject->bStarted )
            {
                break;
            }
        }
	#endif
    }


    /******************************************************************
                GRACEFUL ROLLBACK PROCEDURES AND EXIT DOORS
    ******************************************************************/

EXIT1:

    AnscSetEvent(&pMyObject->RecvEvent);

#if !defined(_ANSC_KERNEL) || !defined(_ANSC_LINUX)
    if ( read_fd_set1 )
    {
        AnscFreeMemory(read_fd_set1);
    }

    if ( read_fd_set2 )
    {
        AnscFreeMemory(read_fd_set2);
    }

    if ( excp_fd_set1 )
    {
        AnscFreeMemory(excp_fd_set1);
    }

    if ( excp_fd_set2 )
    {
        AnscFreeMemory(excp_fd_set2);
    }
#endif

    return  ANSC_STATUS_SUCCESS;
}
Пример #6
0
ANSC_STATUS
AnscBetoRecvTask
    (
        ANSC_HANDLE                 hThisObject
    )
{
    ANSC_STATUS                     returnStatus  = ANSC_STATUS_SUCCESS;
    PANSC_BROKER_ENGINE_TCP_OBJECT  pMyObject     = (PANSC_BROKER_ENGINE_TCP_OBJECT)hThisObject;
    PANSC_BROKER_SERVER_TCP_OBJECT  pServer       = (PANSC_BROKER_SERVER_TCP_OBJECT)pMyObject->hBrokerServer;
    ansc_fd_set*                    pRecvSet1     = (ansc_fd_set*                  )pMyObject->RecvSocketSet;
    xskt_fd_set*                    pRecvSet2     = (xskt_fd_set*                  )pMyObject->RecvSocketSet;
    PANSC_BROKER_SOCKET_TCP_OBJECT  pSocket       = NULL;
    ULONG                           ulLastCleanAt = AnscGetTickInSeconds();
    ANSC_SOCKET                     s_socket      = ANSC_SOCKET_INVALID_SOCKET;
    int                             s_result      = 0;
    int                             s_result_excp = 0;
    int                             s_error       = 0;
    int                             i             = 0;
    uni_fd_set                      read_fd_set;
    /*uni_fd_set                      excp_fd_set;*/
    uni_timeval                     timeval;

    AnscTrace("AnscBetoRecvTask is activated ...!\n");

    /*
     * As a scalable server implemention, we shall accept as many incoming client connections as
     * possible and can only be limited by the system resources. Once the listening socket becomes
     * readable, which means an incoming connection attempt has arrived. We create a new socket
     * object and associate it with the client. This is a repeated process until the socket owner
     * closes the socket.
     */
    while ( pMyObject->bStarted )
    {
        ANSC_COMMIT_TASK();

        /*
         * To avoid letting the old half-dead sockets hogging up the system resource, we need to
         * periodically invoke the cleaning routine. The default interval is 10 seconds, and the
         * idle timeout value is 90 seconds.
         */
        if ( pMyObject->bCleaningDemanded  || 
             (AnscGetTickInSeconds() - ulLastCleanAt) >= ANSC_BETO_CLEAN_TASK_INTERVAL )
        {
            pMyObject->Clean((ANSC_HANDLE)pMyObject);

            ulLastCleanAt                = AnscGetTickInSeconds();
            pMyObject->bCleaningDemanded = FALSE;
        }

        /*
         * The _ansc_select() function returns the total number of socket handles that are ready
         * and contained in the fd_set structures, zero if the time limit expired, or SOCKET_ERROR
         * if an error occurred. Upon return, the structures are updated to reflect the subset of
         * these sockets that meet the specified condition.
         */
    
        if ( pServer->Mode & ANSC_BSTO_MODE_XSOCKET )
        {
            /*
             * no need to use lock for read_fd_set here, dirty read does not matter.
             */
            read_fd_set.xset = *pRecvSet2;

            if( XSKT_SOCKET_FD_ISNUL(&read_fd_set.xset) )
            {
                if ( pServer->Mode & ANSC_BSTO_MODE_EVENT_SYNC )
                {
                    AnscWaitEvent (&pMyObject->NewSocketEvent, ANSC_BETO_WAIT_EVENT_INTERVAL);
                    AnscResetEvent(&pMyObject->NewSocketEvent);
                }
                else
                {
                    AnscSleep(ANSC_BETO_TASK_BREAK_INTERVAL);
                }

                continue;
            }

            timeval.xtv.tv_sec  = (ANSC_BETO_POLL_INTERVAL_MS / 1000);          /* number of seconds      */
            timeval.xtv.tv_usec = (ANSC_BETO_POLL_INTERVAL_MS % 1000) * 1000;   /* number of microseconds */

            s_result = _xskt_select(XSKT_SOCKET_FD_SETSIZE, &read_fd_set.xset, NULL, NULL, &timeval.xtv);

            if ( s_result == 0 )
            {
                continue;
            }

            if ( s_result == XSKT_SOCKET_ERROR )
            {
                s_error = _xskt_get_last_error();
                pMyObject->Reset((ANSC_HANDLE)pMyObject);
                continue;
            }
            
        }
        else
        {
            /*
             * no need to use lock for read_fd_set here, dirty read does not matter.
             */
            read_fd_set.aset = *pRecvSet1;

            if( ANSC_SOCKET_FD_ISNUL(&read_fd_set.aset) )
            {

                if ( pServer->Mode & ANSC_BSTO_MODE_EVENT_SYNC )
                {
                    AnscWaitEvent (&pMyObject->NewSocketEvent, ANSC_BETO_WAIT_EVENT_INTERVAL);
                    AnscResetEvent(&pMyObject->NewSocketEvent);
                }
                else
                {
                    AnscSleep(ANSC_BETO_TASK_BREAK_INTERVAL);
                }

                continue;
            }

            timeval.atv.tv_sec  = (ANSC_BETO_POLL_INTERVAL_MS / 1000);          /* number of seconds      */
            timeval.atv.tv_usec = (ANSC_BETO_POLL_INTERVAL_MS % 1000) * 1000;   /* number of microseconds */

            s_result = _ansc_select(ANSC_SOCKET_FD_SETSIZE, &read_fd_set.aset, NULL, NULL, &timeval.atv);

            if ( s_result == 0 )
            {
                continue;
            }

            if ( s_result == ANSC_SOCKET_ERROR )
            {
                s_error = _ansc_get_last_error();
                pMyObject->Reset((ANSC_HANDLE)pMyObject);
                continue;
            }
            
        }

        /*
         * If there're multiple sockets are receiving data, we loop through the returned fd_set
         * structure and process them one-by-one. However, we have a slight problem: the resulted
         * fd_set consists of only the native socket handles, not the associated Socket Objects.
         * We have to first retrieve the peer's IP address from the socket, and use it to find
         * the associated socket object.
         */
        for ( i = 0; i < s_result; i++ )
        {
            if ( !pMyObject->bStarted )
            {
                break;
            }

            if ( pServer->Mode & ANSC_BSTO_MODE_XSOCKET )
            {
                XSKT_SOCKET_FD_GET(&read_fd_set.xset, s_socket, (ULONG)i);
                if( s_socket == XSKT_SOCKET_INVALID_SOCKET )
                {
                    break;
                }

                if( ! XSKT_SOCKET_FD_ISSET(s_socket, pRecvSet2) )
                {
                    AnscTraceError(("AnscBetoRecvTask: XSKT_SOCKET_FD_ISSET returned FALSE.\n"));
                    continue;
                }
            }
            else
            {
                ANSC_SOCKET_FD_GET(&read_fd_set.aset, s_socket, (ULONG)i);
                if( s_socket == ANSC_SOCKET_INVALID_SOCKET )
                {
                    break;
                }

                if( ! ANSC_SOCKET_FD_ISSET(s_socket, pRecvSet1) )
                {
                    AnscTraceError(("AnscBetoRecvTask: XSKT_SOCKET_FD_ISSET returned FALSE.\n"));
                    continue;
                }
            }

            pSocket =
                (PANSC_BROKER_SOCKET_TCP_OBJECT)pMyObject->GetSocketByOsocket
                    (
                        (ANSC_HANDLE)pMyObject,
                        s_socket
                    );
 
            if ( !pSocket )
            {
                continue;
            }

            /*
             * We should make sure this socket is still valid before proceeding with the socket
             * receive operations. For example, the peer may have already closed or reset the
             * TCP connection while we're serving the previous socket request.
             *
             * 10/06/04 - It's believed this modification is slowing down the GUI and we're not
             * seeing tangible evidence that GUI responsivenss has been improved. So we disable
             * it for now.
             *
             * 11/20/09 - Re-activate the following code segment to validate the socket before
             * proceeding.
             */
            /*
            if ( pServer->Mode & ANSC_BSTO_MODE_XSOCKET )
            {
                XSKT_SOCKET_FD_ZERO((&excp_fd_set.xset));
                XSKT_SOCKET_FD_SET ((XSKT_SOCKET)s_socket, (&excp_fd_set.xset));

                timeval.xtv.tv_sec  = 0;
                timeval.xtv.tv_usec = 0;

                s_result_excp = _xskt_select(XSKT_SOCKET_FD_SETSIZE, NULL, NULL, &excp_fd_set.xset, &timeval.xtv);
            }
            else
            {
                ANSC_SOCKET_FD_ZERO((&excp_fd_set.aset));
                ANSC_SOCKET_FD_SET (s_socket, (&excp_fd_set.aset));

                timeval.atv.tv_sec  = 0;
                timeval.atv.tv_usec = 0;

                s_result_excp = _ansc_select(ANSC_SOCKET_FD_SETSIZE, NULL, NULL, &excp_fd_set.aset, &timeval.atv);
            }

            if ( ((s_result_excp == 1                )                                             ) ||
                 ((s_result_excp == XSKT_SOCKET_ERROR) &&  (pServer->Mode & ANSC_BSTO_MODE_XSOCKET)) ||
                 ((s_result_excp == ANSC_SOCKET_ERROR) && !(pServer->Mode & ANSC_BSTO_MODE_XSOCKET)) )
            {
                if ( TRUE )
                {
                    pSocket->bBroken      = TRUE;
                    pSocket->bToBeCleaned = TRUE;

                    pMyObject->EnableRecv((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket, FALSE);
                    pMyObject->EnableSend((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket, FALSE);
                }

                if ( pServer->Mode & ANSC_BSTO_MODE_AUTO_CLOSE )
                {
                    pMyObject->DelSocket((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket);
                }

                continue;
            }
            */

            returnStatus = 
                pMyObject->Recv
                    (
                        (ANSC_HANDLE)pMyObject,
                        (ANSC_HANDLE)pSocket
                    );
 
        }
    }

    AnscSetEvent(&pMyObject->RecvEvent);

    return  ANSC_STATUS_SUCCESS;
}
ANSC_STATUS
AnscDeuoSend
    (
        ANSC_HANDLE                 hThisObject,
        ANSC_HANDLE                 hSocket,
        PVOID                       buffer,
        ULONG                       ulSize,
        ANSC_HANDLE                 hReserved
    )
{
    ANSC_STATUS                     returnStatus = ANSC_STATUS_SUCCESS;
    PANSC_DAEMON_ENGINE_UDP_OBJECT  pMyObject    = (PANSC_DAEMON_ENGINE_UDP_OBJECT)hThisObject;
    PANSC_DAEMON_SERVER_UDP_OBJECT  pServer      = (PANSC_DAEMON_SERVER_UDP_OBJECT)pMyObject->hDaemonServer;
    PANSC_DSUO_WORKER_OBJECT        pWorker      = (PANSC_DSUO_WORKER_OBJECT      )pServer->hWorker;
    PANSC_DAEMON_SOCKET_UDP_OBJECT  pSocket      = (PANSC_DAEMON_SOCKET_UDP_OBJECT)hSocket;
    int                             s_result     = 0;
    int                             s_error      = 0;
    ansc_socket_addr_in             to_addr;
    xskt_socket_addr_in             xskt_to_addr;

    if ( pSocket->bClosed )
    {
        return  ANSC_STATUS_UNAPPLICABLE;
    }
    else
    {
        if ( pServer->Mode & ANSC_DSUO_MODE_XSOCKET )
        {
            xskt_to_addr.sin_family                                 = XSKT_SOCKET_AF_INET;
            ((pansc_socket_addr_in)&xskt_to_addr)->sin_addr.s_addr  = pSocket->PeerAddress.Value;
            xskt_to_addr.sin_port                                   = _xskt_htons(pSocket->PeerPort);
        }
        else
        {
            to_addr.sin_family      = ANSC_SOCKET_AF_INET;
            to_addr.sin_addr.s_addr = pSocket->PeerAddress.Value;
            to_addr.sin_port        = _ansc_htons(pSocket->PeerPort);
        }
    }

    if ( pMyObject->ControlFlags & ANSC_DEUO_FLAG_ASYNC_SEND )
    {
        returnStatus = ANSC_STATUS_UNAPPLICABLE;
    }
    else
    {
        if ( pServer->Mode & ANSC_DSUO_MODE_XSOCKET )
        {
            s_result = _xskt_sendto(pSocket->Socket, buffer, (int)ulSize, 0, (xskt_socket_addr*)&xskt_to_addr, sizeof(xskt_to_addr));
        }
        else
        {
            s_result = _ansc_sendto(pSocket->Socket, buffer, (int)ulSize, 0, (ansc_socket_addr*)&to_addr, sizeof(to_addr));
        }

        if ( s_result == ANSC_SOCKET_ERROR )
        {
            s_error = _ansc_get_last_error();

            returnStatus =
                pWorker->SendComplete
                    (
                        pWorker->hWorkerContext,
                        (ANSC_HANDLE)pSocket,
                        hReserved,
                        ANSC_STATUS_FAILURE
                    );

            returnStatus =
                pWorker->Notify
                    (
                        pWorker->hWorkerContext,
                        (ANSC_HANDLE)pSocket,
                        ANSC_DSUOWO_EVENT_SOCKET_ERROR,
                        hReserved
                    );

            if ( pServer->Mode & ANSC_DSUO_MODE_AUTO_CLOSE )
            {
                pMyObject->DelSocket((ANSC_HANDLE)pMyObject, (ANSC_HANDLE)pSocket);
            }

            returnStatus = ANSC_STATUS_FAILURE;
        }
        else
        {
            returnStatus =
                pWorker->SendComplete
                    (
                        pWorker->hWorkerContext,
                        (ANSC_HANDLE)pSocket,
                        hReserved,
                        ANSC_STATUS_SUCCESS
                    );

            pSocket->SendBytesCount += ulSize;
            pSocket->LastSendAt      = AnscGetTickInSeconds();

            returnStatus = ANSC_STATUS_SUCCESS;
        }
    }

    return  returnStatus;
}