Question

我有两个程序Node-A和Node-B，其中Node-A正在向Node-B发送一些char *数据，而Node-B正在向Node-A发送ack（char *数据）。即，clientNodeA_thread正在向Node-B的serverNodeB_thread发送数据。代码如下：

NodeA上

Object o = hmap.get(key);
String stringVal = (o == null) ? null : o.toString()

节点B

int main()
    {
      pthread_t clientNodeA, serverNodeA;

      usleep(3000000);
      pthread_create(&clientNodeA, NULL, clientNodeA_thread, "clientNodeA");
      pthread_create(&serverNodeA, NULL, serverNodeA_thread, "serverNodeA");
      usleep(100000000);

      pthread_join(clientNodeA, NULL);
      pthread_join(serverNodeA, NULL);
      return 0;
    }

    void* clientNodeA_thread(void* pString)
    {
        int connSock, in, i, ret, flags;
        struct sockaddr_in servaddr, NodeAaddr;
        struct sctp_status status;
        char buffer[MAX_BUFFER+1];
        /* Sample input*/
         strncpy(buffer, "FrmNodeAClt", 12);
         buffer[12]='\0';

         connSock = socket( AF_INET, SOCK_STREAM, IPPROTO_SCTP );

         if(connSock == -1)
           die("socket()");
         #if 0
         bzero( (void *)&NodeAaddr, sizeof(NodeAaddr) );
         NodeAaddr.sin_family = AF_INET;
         NodeAaddr.sin_port = htons(MY_PORT_NUM_NodeA2);
         NodeAaddr.sin_addr.s_addr = inet_addr( "127.0.0.1" );
         #endif

         bzero( (void *)&servaddr, sizeof(servaddr) );
         servaddr.sin_family = AF_INET;
         servaddr.sin_port = htons(MY_PORT_NUM_NodeB);
         servaddr.sin_addr.s_addr = inet_addr( "127.0.0.1" );



    ret = connect( connSock, (struct sockaddr *)&servaddr, sizeof(servaddr) );

         if(ret == -1)
            die("connect()");

           ret = sctp_sendmsg( connSock, (void *)buffer, (size_t)strlen(buffer),
                              NULL, 0, 0, 0, 0, 0, 0 );
        return 0;
    }

    void* serverNodeA_thread(void* pString)
    {
      int listenSock, connSock, ret, in , flags, i;
      struct sockaddr_in servaddr;
      struct sockaddr_in src_addr;
      struct sctp_initmsg initmsg;
      int addr_len = 0;

      listenSock = socket( AF_INET, SOCK_STREAM, IPPROTO_SCTP );
      bzero( (void *)&servaddr, sizeof(servaddr) );
      servaddr.sin_family = AF_INET;
      servaddr.sin_addr.s_addr = inet_addr( "127.0.0.1" );
      servaddr.sin_port = htons(MY_PORT_NUM_ENB2);

  ret = bind( listenSock, (struct sockaddr *)&servaddr, sizeof(servaddr) );

      /* Specify that a maximum of 5 streams will be available per socket */
      memset( &initmsg, 0, sizeof(initmsg) );
      initmsg.sinit_num_ostreams = 5;
      initmsg.sinit_max_instreams = 5;
      initmsg.sinit_max_attempts = 4;
      ret = setsockopt( listenSock, IPPROTO_SCTP, SCTP_INITMSG, 
                         &initmsg, sizeof(initmsg) );

      listen( listenSock, 5 );

      while( 1 ) {

      char buffer[MAX_BUFFER + 1];
      int len ;  

      bzero(buffer, MAX_BUFFER + 1);

      printf("Awaiting a new connection\n");

      connSock = accept( listenSock, (struct sockaddr *)NULL, (int *)NULL );
      if(connSock == -1)
          die("accept()");
        else
          printf("New client connected....\n");
          addr_len = sizeof (src_addr);
          recvfrom(connSock, buffer, sizeof(buffer), 0, &src_addr, &addr_len);
          printf("Received data from NodeB : %s\n", (char*)buffer);
      }
    }

我能够将数据从Node-A客户端发送到Node-B服务器，Node-B也能够发送Ack数据（在Wireshark中验证），但它没有到达Node-A接收代码。

这方面的任何帮助都会非常有帮助。

Answer 1

问题解决了！我刚刚移动了NodeA的套接字创建并将部分绑定到main函数，以便客户端和服务器线程共享它，客户端和服务器线程只会执行发送和接收功能。

谢谢@Joachim Pileborg

客户端通过套接字未收到数据[传输端点已连接]

1 个答案: