简单的UDP协议实现

最新推荐文章于 2024-07-29 18:04:39 发布

原创最新推荐文章于 2024-07-29 18:04:39 发布 · 624 阅读

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文章标签：

#socket #server #服务器 #网络

服务器端：

#include <winsock2.h> #include <stdio.h> int main() { //1.启动Winsock WORD wVersionRequested; WSADATA wsaData; wVersionRequested = MAKEWORD(2,2); if(WSAStartup(wVersionRequested,&wsaData)){ printf("Startup fail! Can not find a usable WinSock DLL./n"); return 0; } //2.创建数据报套接字 SOCKET fd_Server = socket(AF_INET,SOCK_DGRAM,0); if(INVALID_SOCKET == fd_Server){ printf("socket error!/n"); } //3.本地地址绑定套接字，以使在网络上标识该套接字 SOCKADDR_IN serverAddr; serverAddr.sin_family = AF_INET; serverAddr.sin_port = htons(11111); serverAddr.sin_addr.S_un.S_addr = inet_addr("0.0.0.0"); if(bind(fd_Server,(SOCKADDR*)&serverAddr,sizeof(SOCKADDR_IN))){ printf("bind error!/n"); } /*******************************************************************************/ //4.接收客户端数据 SOCKADDR_IN clientAddr; ZeroMemory(&clientAddr, sizeof(clientAddr)); char data[100]; memset(data,0,100); int size = sizeof(SOCKADDR_IN); recvfrom(fd_Server,data,100,0,(SOCKADDR*)&clientAddr,&size); printf("服务器接收到数据: %s/n",data); printf("客户端IP:Port为: %s:%d/n",inet_ntoa(clientAddr.sin_addr),clientAddr.sin_port); //5.发送数据到客户端 if(SOCKET_ERROR == sendto(fd_Server,data,100,0,(SOCKADDR*)&clientAddr,size)){ printf("sendto函数错误代码：%d/n",WSAGetLastError()); } /*******************************************************************************/ //6.洗洗睡吧 closesocket(fd_Server);//关闭套接字 WSACleanup();//终止Winsock return 0; }

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客户端：

#include <WINSOCK2.H> #include <stdio.h> int main() { //1.启动Winsock WORD wVersionRequested; WSADATA wsaData; wVersionRequested = MAKEWORD(2,2); if(WSAStartup(wVersionRequested,&wsaData)){ printf("Startup fail! Can not find a usable WinSock DLL./n"); return 0; } //2.创建数据报套接字 SOCKET fd_client = socket(AF_INET,SOCK_DGRAM,0); //3.设定服务器地址 SOCKADDR_IN serverAddr; serverAddr.sin_family = AF_INET; serverAddr.sin_port = htons(11111); serverAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); /********************************************************************************/ //4.向服务器发送数据 char data[100] = "客户端发送数据！"; int size = sizeof(SOCKADDR_IN); sendto(fd_client,data,100,0,(SOCKADDR*)&serverAddr,size); //5.接收服务器数据 char content[100]; memset(content,0,100); recvfrom(fd_client,content,100,0,(SOCKADDR*)&serverAddr,&size); printf("client receive: %s/n",content); /********************************************************************************/ closesocket(fd_client); WSACleanup(); return 0; }