简单的 C++ SOCKET编程 ---基于TCP/IP协议(转)

server端：
 
#include <WINSOCK2.H>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")
void main()
{
 //创建套接字
 WORD myVersionRequest;
 WSADATA wsaData;
 myVersionRequest=MAKEWORD(1,1);
 int err;
 err=WSAStartup(myVersionRequest,&wsaData);
 if (!err)
 {
  printf("已打开套接字\n");
 } 
 else
 {
  //进一步绑定套接字
  printf("嵌套字未打开!");
  return;
 }
 SOCKET serSocket=socket(AF_INET,SOCK_STREAM,0);//创建了可识别套接字
 //需要绑定的参数
 SOCKADDR_IN addr;
 addr.sin_family=AF_INET;
 addr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);//ip地址
 addr.sin_port=htons(6000);//绑定端口
 
 bind(serSocket,(SOCKADDR*)&addr,sizeof(SOCKADDR));//绑定完成
 listen(serSocket,5);//其中第二个参数代表能够接收的最多的连接数
 
 //////////////////////////////////////////////////////////////////////////
 //开始进行监听
 //////////////////////////////////////////////////////////////////////////
 SOCKADDR_IN clientsocket;
 int len=sizeof(SOCKADDR);
 while (1)
 {
  SOCKET serConn=accept(serSocket,(SOCKADDR*)&clientsocket,&len);//如果这里不是accept而是conection的话。。就会不断的监听
  char sendBuf[100];
  
  sprintf(sendBuf,"welcome %s to bejing",inet_ntoa(clientsocket.sin_addr));//找对对应的IP并且将这行字打印到那里
  send(serConn,sendBuf,strlen(sendBuf)+1,0);
  char receiveBuf[100];//接收
  recv(serConn,receiveBuf,strlen(receiveBuf)+1,0);
  printf("%s\n",receiveBuf);
  closesocket(serConn);//关闭
 WSACleanup();//释放资源的操作
 }
}
 
 
 
client端：
 

#include <WINSOCK2.H>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")
void main()
{
 int err;
 WORD versionRequired;
 WSADATA wsaData;
 versionRequired=MAKEWORD(1,1);
 err=WSAStartup(versionRequired,&wsaData);//协议库的版本信息
 if (!err)
 {
  printf("客户端嵌套字已经打开!\n");
 }
 else
 {
  printf("客户端的嵌套字打开失败!\n");
  return;//结束
 }
 SOCKET clientSocket=socket(AF_INET,SOCK_STREAM,0);
 SOCKADDR_IN clientsock_in;
 clientsock_in.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
 clientsock_in.sin_family=AF_INET;
 clientsock_in.sin_port=htons(6000);
 //bind(clientSocket,(SOCKADDR*)&clientsock_in,strlen(SOCKADDR));//注意第三个参数
 //listen(clientSocket,5);
 connect(clientSocket,(SOCKADDR*)&clientsock_in,sizeof(SOCKADDR));//开始连接
 char receiveBuf[100];
 recv(clientSocket,receiveBuf,101,0);
 printf("%s\n",receiveBuf);
 send(clientSocket,"hello,this is client",strlen("hello,this is client")+1,0);
 closesocket(clientSocket);
 WSACleanup();
}