UDP通信

来源：互联网发布：一般数据保护条例编辑：程序博客网时间：2024/05/16 09:59

建立UDP通信，服务器的端的代码如下：

#include <Winsock2.h>#include <iostream>using namespace std;#include <stdio.h>#pragma   comment(lib,"Ws2_32.lib")  void GetIP(void) { char host_name[255]; gethostname(host_name, sizeof(host_name)); cout<<"本机主机名为："<<"  "<<host_name<<endl<<endl; struct hostent *phe = gethostbyname(host_name);struct in_addr addr;memcpy(&addr, phe->h_addr_list[0], sizeof(struct in_addr));char *ip=inet_ntoa(addr);//网络地址格式转换cout<<"本机IP地址为："<<"  "<<ip<<endl;} int main(){WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested=MAKEWORD(2,0);err=WSAStartup(wVersionRequested,&wsaData);if(0!=err){cout<<"Socket2.0 初始化失败"<<endl;return -1;}if(LOBYTE(wsaData.wVersion)!=2||HIBYTE(wsaData.wVersion)!=0){WSACleanup();return -1;}GetIP();SOCKET sockConn=socket(AF_INET,SOCK_DGRAM,0);SOCKADDR_IN addrSrv;addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);addrSrv.sin_family=AF_INET;addrSrv.sin_port=htons(6000);bind(sockConn,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));int len=sizeof(SOCKADDR);while(1){printf("客户端信息: ");char recvBuf[1000];recv(sockConn,recvBuf,1000,0);puts(recvBuf);}if(!closesocket(sockConn)){WSAGetLastError();return -1;}if(!WSACleanup()){WSAGetLastError();return -1;}return 0; }

客户端的代码：

#include <Winsock2.h>#include <iostream>using namespace std;#include <stdio.h>#pragma comment(lib,"ws2_32.lib") int main(){WORD wVersionRequested;WSADATA wsaData;int err;wVersionRequested=MAKEWORD(2,0);err=WSAStartup(wVersionRequested,&wsaData);if(0!=err){cout<<"Socket2.0 初始化失败"<<endl;return -1;}if(LOBYTE(wsaData.wVersion)!=2||HIBYTE(wsaData.wVersion)!=0){WSACleanup();return -1;}char str[100];cout<<"输入要连接的主机的IP地址："<<endl;gets(str);int m;cout<<"输入要连接的主机的端口号："<<endl;cin>>m;SOCKET sockClient=socket(AF_INET,SOCK_DGRAM,0);SOCKADDR_IN addrSrv;addrSrv.sin_addr.S_un.S_addr=inet_addr(str);addrSrv.sin_family=AF_INET;addrSrv.sin_port=htons(m);int len=sizeof(SOCKADDR);while(1){printf("要发送的信息请输入: ");char sendBuf[1000];gets(sendBuf);sendto(sockClient,sendBuf,strlen(sendBuf)+1,0,(SOCKADDR*)&addrSrv,len);}if(!closesocket(sockClient)){WSAGetLastError();return -1;}if(!WSACleanup()){WSAGetLastError();return -1;}return 0;}

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