winsocket编程实例

#include <Winsock2.h>
#include <stdio.h>

void main()
{
  WORDwVersionRequested;
  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(6000);

  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);
     char sendBuf[100];
     sprint(sendBuf,"Welcome %s to http://www.sunxin.org",
           inet_ntoa(addrClient.sin_addr));
     send(sockConn,sendBuf,strlen(sendBuf)+1,0);
     char recvBuf[100];
     recv(sockConn,recvBuf);
     printf("%s/n",recvBuf);
     closesocket(sockConn);
     WSACleanup();
  } 

}
注：这是Server端；File->New->Win32 Console Application，工程名：TcpSrv；然后，File->New->C++ Source File，文件名：TcpSrv；在该工程的Setting的Link的Object/library modules项要加入ws2_32.lib

－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

#include <Winsock2.h>
#include <stdio.h>

void main()
{
  WORDwVersionRequested;
  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("127.0.0.1");
  addrSrv.sin_family=AF_INET;
  addrSrv.sin_porthtons(6000);
  connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
 
  char recvBuf[100];
  recv(sockClient,recvBuf,100,0);
  printf("%s/n",recvBuf);
  send(sockClient,"This is zhangsan",strlen("This is zhangsan")+1,0); 

  closesocket(sockClient);
  WSACleanup();

}

注：这是Client端；File->New->Win32 Console Application，工程名：TcpClient；然后，File->New->C++ Source File，文件名：TcpClient；同理，在该工程的Setting的Link的Object/library modules项要加入ws2_32.lib