c++ UDP

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c++ UDP

2008年11月7日

server端

#include <Winsock2.h>
#include <iostream>
#pragma comment(lib,"ws2_32.lib")
using namespace std;
int main()
{

WSADATA wsaData;
if( WSAStartup( MAKEWORD( 2, 2 ), &wsaData )!=0)
{
  return 0;
}
SOCKET sockSrv = 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(1986);
bind(sockSrv, (SOCKADDR *)&addrSrv,sizeof(SOCKADDR));
    SOCKADDR_IN addrClient;
int len=sizeof(SOCKADDR);
char recvBuf[100];
recvfrom(sockSrv,recvBuf,100,0,(SOCKADDR*)&addrClient,&len);
    cout<<recvBuf<<endl;
closesocket(sockSrv);
WSACleanup();
}

client端

#include <Winsock2.h>
#include <iostream>
#pragma comment(lib,"ws2_32.lib")
using namespace std;
int main()
{
WSADATA wsaData;
if( WSAStartup(MAKEWORD( 2, 2 ), &wsaData )!=0);
SOCKET sockClient = socket(AF_INET,SOCK_DGRAM,0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(1986);
sendto(sockClient,"客户端发送到服务端",strlen("客户端发送到服务端")+1,0,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
closesocket(sockClient);
WSACleanup();
return 0;
}
在VC++2005下调试通过