Question

int acceptSocket;
char buf[100];
long sentbytes;
socklen_t len;
int port = 18227;

int CreateSocket()
{
    long rc;
    struct sockaddr_in addr, client;

       // Socket creation for UDP
       acceptSocket=socket(AF_INET,SOCK_DGRAM,0);

       if(acceptSocket==-1)
       {
         printf("Failure: socket creation is failed, failure code\n");
         return 1;
       }
       else
       {
         printf("Socket started!\n");
       }

     memset(&addr, 0, sizeof(struct sockaddr_in));
     addr.sin_family=AF_INET;
     addr.sin_port=htons(port);
     addr.sin_addr.s_addr=htonl(INADDR_ANY);
     rc=bind(acceptSocket,(struct sockaddr*)&addr,sizeof(addr));

     if(rc== -1)
     {
       printf("Failure: listen, failure code:\n");
       return 1;
     }
     else
     {
       printf("Socket an port %d \n",port);
     }

     while(rc!=-1)
         {
         len =sizeof(client);
         rc=recvfrom(acceptSocket,buf, sizeof(buf), 0, (struct sockaddr*) &client, &len);
         if(rc==0)
         {
           printf("Server has no connection..\n");
           break;
         }
         if(rc==-1)
         {
             printf("something went wrong with data %s", strerror(errno));
           break;
         }

         XcpIp_RxCallback( (uint16) rc, (uint8*) buf, (uint16) port );

            makeTimer("First Timer", &firstTimerID, 2, 2);   //2ms
                makeTimer("Second Timer", &secondTimerID, 10, 10);    //10ms
                makeTimer("Third Timer", &thirdTimerID, 100, 100);  //100ms
          }

       close(acceptSocket);
       return 0;
     }

int main()
{
     Xcp_Initialize();
     CreateSocket();
     return 0;
}

//API for sending the data to the client.
void XcpApp_IpTransmit( uint16 XcpPort,  Xcp_StatePtr8 pBytes, uint16 numBytes )
{
    struct sockaddr_in client;

        if ((long)XcpPort==port){
                sentbytes = sendto(acceptSocket,(char*)pBytes,(long)numBytes,0, (struct sockaddr*)&client, sizeof(client));
        }
        XcpIp_TxCallback(port,(uint16)sentbytes);
}

我创建了一个服务器端程序，用于从客户端接收数据并将响应发送回客户端。我不知道上述程序中的错误在哪里，我无法从客户端接收数据，也没有回复客户端的响应。客户端是一种将数据发送到指定端口和IP地址的工具。

注意：客户将继续发送数据。有人可以帮我吗？

用于linux的udp socket程序

0 个答案: