C++ 簡單SOCKET 通信

    #include "stdafx.h"


#include <Winsock2.h>  
#include <stdio.h>  
#include <iostream>  
#include "SocketService.h"  
#pragma comment(lib, "WS2_32")  
using std::string;  
namespace SocketService  
{  
 //監聽端：   
void WINAPI StartToListen(void (*p)())  
{  
WORD wVersionRequested;  
WSADATA wsaData;  
int err;  
wVersionRequested = MAKEWORD(1,1);  
err = WSAStartup(wVersionRequested, &wsaData);  
if ( err != 0 )  
 {  
  return;  
 }  
 if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1 )   
 {  
  WSACleanup();  
  return;  
 }  
 SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);  
 SOCKADDR_IN addrSrv;  
 addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);  
 addrSrv.sin_family=AF_INET;  
 addrSrv.sin_port=htons(8000);  

 bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));  
 listen(sockSrv,5);  
 SOCKADDR_IN addrClient;  
 int len=sizeof(SOCKADDR);  
 while(1)  
 {  
  SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);  
  p();  
  char sendBuf[50];  
  send(sockConn,sendBuf,strlen(sendBuf)+1,0);  
  char recvBuf[50];  
  recv(sockConn,recvBuf,50,0);  
  p();  
  closesocket(sockConn);  
 }  
}  
//發送端  
void WINAPI Send(char* ipAddress,char* message)  
{  
WORD wVersionRequested;  
 WSADATA wsaData;  
 int err;  

 wVersionRequested = MAKEWORD(1,1);  

 err = WSAStartup( wVersionRequested, &wsaData );  
 if ( err != 0 ) {  
  return;  
 }  

 if ( LOBYTE( wsaData.wVersion ) != 1 ||  
         HIBYTE( wsaData.wVersion ) != 1 ) {  
   WSACleanup( );  
  return;  
 }  
 SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);  

 SOCKADDR_IN addrSrv;  
 addrSrv.sin_addr.S_un.S_addr=inet_addr(ipAddress);  
 addrSrv.sin_family=AF_INET;  
 addrSrv.sin_port=htons(8000);  
 connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));  
 send(sockClient,message,strlen(message)+1,0);  

 closesocket(sockClient);  
 WSACleanup();  
}  
}  </pre>