UDP广播

来源：互联网发布：河南软件集成商编辑：程序博客网时间：2024/04/27 23:45

//客户端

#include <iostream>

#include <winsock2.h>
#pragma comment(lib ,"ws2_32")
int main()
{
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2),&wsaData);
SOCKET socketfd;
SOCKADDR_IN addr;
addr.sin_family=AF_INET;
addr.sin_addr.s_addr=htonl(0);////INADDR_BROADCAST//=inet_addr("127.0.0.1")//INADDR_ANY
addr.sin_port=htons(8080);
socketfd = socket(AF_INET, SOCK_DGRAM, 0);
char data[50];
int len = sizeof(sockaddr);
bind(socketfd,(sockaddr *)&addr,sizeof(sockaddr));
while(1)
{
recvfrom(socketfd, data, 50 , 0, (sockaddr *)&addr,&len);
std::cout<<data<<std::endl;
Sleep(100);
}
getchar();
WSACleanup();
return 0;

}

//服务端

#include <iostream>
#include <winsock2.h>
#pragma comment(lib ,"ws2_32")
int main()
{
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2),&wsaData);
SOCKET socketfd;
SOCKADDR_IN addr;
addr.sin_family=AF_INET;
addr.sin_addr.s_addr=htonl(INADDR_BROADCAST);//=inet_addr("255.255.255.255");
addr.sin_port=htons(8080);
socketfd = socket(AF_INET, SOCK_DGRAM, 0);
int so_broadcast = 1;
setsockopt(socketfd,SOL_SOCKET,SO_BROADCAST,(char *)&so_broadcast,sizeof(so_broadcast));
char data[] = "123456" ;
//char i = 1 + '0';
std::cin>>data;
while(1)
{
//*data = i;
sendto(socketfd, data, strlen(data) + 1, 0, (sockaddr *)&addr, sizeof(sockaddr));
//++i;
Sleep(100);
}
getchar();
WSACleanup();
return 0;
}