UDP网络通信程序
//服务器端 #include "Winsock2.h" #include "stdio.h" #pragma comment(lib, "ws2_32.lib") int main() { ////////////////////////////////////////加载套接字//////////////////////////////////////////////////// WORD wVersionRequested;//套接字库版本号 WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2);//定义套接字的版本号 err = WSAStartup(wVersionRequested, &wsaData);//创建套接字 if (err != 0) { return 0; } ///创建套接字失败处理 if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 0; } SOCKET SrvSock = socket(AF_INET, SOCK_DGRAM, 0);//创建套接字 SOCKADDR_IN SrvAddr; SrvAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//绑定服务端IP地址 SrvAddr.sin_family = AF_INET;//服务端地址族 SrvAddr.sin_port = htons(6001);//绑定服务端端口号 bind(SrvSock, (SOCKADDR*)&SrvAddr, sizeof(SOCKADDR)); int len = sizeof(SOCKADDR); char buff[100]; SOCKADDR ClistAddr; recvfrom(SrvSock, buff, 100, 0, (SOCKADDR*)&ClistAddr, &len);//等待接收客户端的请求到来 printf("%s\n", buff);//把客户端发送来的buff信息打印出来 closesocket(SrvSock);//关闭套接字 WSACleanup(); system("pause"); return 0; }
//客户端程序 #include "Winsock2.h" #include "stdio.h" #pragma comment(lib, "ws2_32.lib") int main() { ////////////////////////////////////////加载套接字//////////////////////////////////////////////////// WORD wVersionRequested;//套接字库版本号 WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2);//定义套接字的版本号 err = WSAStartup(wVersionRequested, &wsaData);//创建套接字 if (err != 0) { return 0; } ///创建套接字失败处理 if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 0; } SOCKET ClistSock = socket(AF_INET, SOCK_DGRAM, 0);//创建套接字类型 SOCKADDR_IN SrvAddr; SrvAddr.sin_family = AF_INET;//选择地址族 SrvAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");//服务端的IP地址 SrvAddr.sin_port = htons(6001);//服务端的端口号 sendto(ClistSock, "hello", strlen("hello") + 1, 0, (SOCKADDR*)&SrvAddr, sizeof(SOCKADDR));//往服务端发送"hello"消息 closesocket(ClistSock);//关闭套接字 WSACleanup();// return 0; }