c/c++语言开发共享C中的WinSock程序仅适用于本地计算机

我是网络编程的新手，开始学习如何在C中使用WinSock。

我现在对网络没有任何了解。

无论如何，我使用WinSock为Client和Server编写了以下代码。

服务器：

#include  #include  #include  #include  #define MY_ERROR 1 #define PORT 7777 #define MAX_NUM_CLIENTS 1 /* I don't know how to thread right now. */ #define MAX_CLIENT_MSG_LEN 1000 int main() { WSADATA wsa; SOCKET mySocket, acceptSocket; struct sockaddr_in server, client; int sockAddrInLength = sizeof(struct sockaddr_in); char clientMessage[MAX_CLIENT_MSG_LEN]; int clientMessageLength; char* message; int running = 1; if(WSAStartup(MAKEWORD(2,2), &wsa) != 0) { fprintf(stderr, "WSAStartup failed.n"); return MY_ERROR; } printf("WSAStartup succeded.n"); mySocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (mySocket == INVALID_SOCKET) { fprintf(stderr, "Socket creation failed.n"); return MY_ERROR; } printf("Socket creation succeeded.n"); server.sin_addr.s_addr = INADDR_ANY; server.sin_family = AF_INET; server.sin_port = htons(PORT); if (bind(mySocket, (struct sockaddr*) &server, sizeof server) == SOCKET_ERROR) { fprintf(stderr, "Binding socket on port %d failed.n", PORT); return MY_ERROR; } printf("Binding socket on port %d successfully.n", PORT); while (running) { listen(mySocket, MAX_NUM_CLIENTS); printf("Waiting for a connection...n"); acceptSocket = accept(mySocket, (struct sockaddr*) &client, &sockAddrInLength); if (acceptSocket == INVALID_SOCKET) { fprintf(stderr, "Accept failed.n"); return MY_ERROR; } printf("Accept succeeded.n"); if ((clientMessageLength = recv(acceptSocket, clientMessage, sizeof clientMessage, 0)) == SOCKET_ERROR) { fprintf(stderr, "Recv failed.n"); return MY_ERROR; } printf("Recv succeeded.n"); printf("Data:n"); clientMessage[clientMessageLength] = NULL; /* Null terminator */ printf("Client: %sn", clientMessage); message = "Hello client, I'm the server. Bye bye. :-)n"; if (send(acceptSocket, message, strlen(message), 0) < 0) { fprintf(stderr, "Send failed.n"); return MY_ERROR; } printf("Send succeded.n"); } closesocket(mySocket); WSACleanup(); getchar(); return 0; } 

这是客户的代码：

 #include  #include  #include  #include  #define IP /* My IP */ #define MY_ERROR 1 #define PORT 7777 #define MAX_SERVER_MSG_LEN 1000 int main() { WSADATA wsa; SOCKET mySocket; struct sockaddr_in server; char* message; char serverMessage[MAX_SERVER_MSG_LEN]; int serverMessageLength; if(WSAStartup(MAKEWORD(2,2), &wsa) != 0) { fprintf(stderr, "WSAStartup failed.n"); getchar(); return MY_ERROR; } printf("WSASucceeded.n"); mySocket = socket(AF_INET,SOCK_STREAM, IPPROTO_TCP); if (mySocket == INVALID_SOCKET) { fprintf(stderr, "Socket creation failed.n"); getchar(); return MY_ERROR; } server.sin_addr.s_addr = inet_addr(IP); server.sin_family = AF_INET; server.sin_port = htons(PORT); if (connect(mySocket, (struct sockaddr*) &server, sizeof server) < 0) { fprintf(stderr, "Connection failed. error: %sn",WSAGetLastError()); getchar(); return MY_ERROR; } printf("Connection established.n"); message = "Hello server, I'm the sweet client. :-)n"; if (send(mySocket, message, strlen(message), 0) < 0) { fprintf(stderr, "Sending failed.n"); return MY_ERROR; } printf("Sending succeeded.n"); if ((serverMessageLength = recv(mySocket, serverMessage, sizeof serverMessage, 0)) == SOCKET_ERROR) { fprintf(stderr, "Recv failed.n"); return MY_ERROR; } printf("Recv succeeded.n"); printf("Data:n"); serverMessage[serverMessageLength] = NULL; printf("Server: %s", serverMessage); closesocket(mySocket); getchar(); return 0; } 

好。

当我在我的comupter上运行服务器和客户端，并将IP（在客户端代码中）定义为我的内部IP（我认为，因为它是192.168.xx的forms）它工作正常。

当我将IP定义为我的外部IP时，它在我的计算机上不起作用（当我在我的计算机上运行两个程序时）。 连接失败。

另外 – 当我试图在任何其他计算机上运行客户端时，它不起作用（当IP被定义为我的内部或我的外部IP）时，连接失败。

我的问题是：

如果您有任何文章/类似的东西，以便让我更好地了解问题，它也可能有所帮助。

非常感谢你！ ?

以上就是c/c++开发分享C中的WinSock程序仅适用于本地计算机相关内容,想了解更多C/C++开发(异常处理)及C/C++游戏开发关注计算机技术网(www.ctvol.com)!)。