WIN网络编程-UDPServer

//////////////////////////////////////////////////////////
// UDPServer.cpp文件

#include "../common/InitSock.h"
#include <stdio.h>
CInitSock initSock;//初始化Winsock库

int main()
{
// 创建套节字
SOCKET s = ::socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
if(s == INVALID_SOCKET)
{
printf("Failed socket()\n");
return 0;
}

// 填充sockaddr_in结构
sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(4567);
sin.sin_addr.S_un.S_addr = INADDR_ANY;

// 绑定这个套节字到一个本地地址
if(::bind(s, (LPSOCKADDR)&sin,sizeof(sin)) == SOCKET_ERROR)
{
printf("Failed bind()\n");
return 0;
}

// 接收数据
char buff[1024];
sockaddr_in addr;
int nLen = sizeof(addr);
while(TRUE)
{
int nRecv = ::recvfrom(s, buff,1024, 0, (sockaddr*)&addr,&nLen);
if(nRecv >0)
{
buff[nRecv] ='\0';
printf("接收到数据（%s）：%s", ::inet_ntoa(addr.sin_addr), buff);
}
}
::closesocket(s);
}