服务器客户端c程序出错：“连接：非套接字上的套接字 *** 作”

概述我正在研究套接字程序,编译时一切都很好.首先,我编译并运行服务器,然后编译并运行客户端.服务器运行正常,但是当客户端启动时,我在Connect()函数中收到一条错误消息.虽然套接字似乎没问题,但客户端将无法连接,服务器也看不到连接尝试. 错误消息是： Connect: Socket operation on non-socket 这是服务器端代码： if ((ListeningSocket = s 我正在研究套接字程序,编译时一切都很好.首先,我编译并运行服务器,然后编译并运行客户端.服务器运行正常,但是当客户端启动时,我在Connect()函数中收到一条错误消息.虽然套接字似乎没问题,但客户端将无法连接,服务器也看不到连接尝试.

错误消息是：

Connect: Socket operation on non-socket

这是服务器端代码：

if ((ListeningSocket = socket(AF_INET,SOCK_STREAM,0 )) == -1){        printf("socket Failed!\n");        exit(1);    }     else          printf("Server: socket() is OK!\n");     ServerAddr.sin_family = AF_INET;     ServerAddr.sin_port = htons(5000);     ServerAddr.sin_addr.s_addr = INADDR_ANY; // any one for any network can connect     memset(&(ServerAddr.sin_zero),'
if(SendingSocket = socket(AF_INET,0) == -1)     {          printf("ClIEnt: socket() Failed!");          exit (1);     }     else          printf("ClIEnt: socket() is OK!\n");     ClIEntAddr.sin_family = AF_INET;     ClIEntAddr.sin_port = htons(5000);       ClIEntAddr.sin_addr.s_addr = inet_addr("127.0.0.1");     memset(&(ClIEntAddr.sin_zero),8); if  ( connect (SendingSocket,sizeof(struct sockaddr)) == -1)         {            perror("Connect");            exit(1);        }     else     {          printf("ClIEnt: connect() is OK,got connected...\n");          printf("ClIEnt: Ready for sending and/or receiving data...\n");     }....
',8); //     if (bind (ListeningSocket,(struct sockaddr *)&ServerAddr,sizeof(struct sockaddr))==-1)     {          printf("Server: bind() Failed!\n");          exit (1);     }     else          printf("Server: bind() is OK!\n");     if (Listen(ListeningSocket,5)== -1){          printf("Server: Error Listening on socket\n");          exit (1);     }     else{     printf("Server: Listen() is OK,I'm waiting for connections...\n");     printf("Server: accept() is ready...\n");}         sin_size = sizeof(struct sockaddr_in);     NewConnection = accept(ListeningSocket,(struct sockaddr *)&ClIEntAddr,(socklen_t *)&sin_size);         printf("Server: accept() is OK...\n");         printf("Server: ClIEnt connected,ready for receiving and sending data...\n");............. //}

这是客户端代码：

if(SendingSocket = socket(AF_INET,0) == -1)

解决方法 你缺少一个括号.代码

if((SendingSocket = socket(AF_INET,0)) == -1)

应该读

if(SendingSocket = (socket(AF_INET,0) == -1))

你写它的方式,就意味着

这意味着：将socket()结果与-1进行比较,给出0或1,并将其分配给SendingSocket;然后测试它是真还是假.因此,假设socket()调用成功,则SendingSocket可能为0.

总结

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