tcp/ip 全双工会话(windows)

1.服务器端

#include "stdafx.h"
#include
using namespace std;

#include
#pragma  comment(lib,"WS2_32.lib")

#define MAX_BUFFER 256   //对于收发的数据有限  有必要考虑封装数据收发函数

int _tmain(int argc, _TCHAR* argv[])
{
 WSADATA wsaData;
 WORD sockVersion = MAKEWORD(2,2);  //设置版本号
 if(::WSAStartup(sockVersion,&wsaData))  //初始化网络资源
  exit(0);
 SOCKET sock = ::socket(AF_INET, SOCK_STREAM, 0);
 if(sock == SOCKET_ERROR)
 {
  cout<<"Fail socket()."<   return 0;
 }

 sockaddr_in addr;
 addr.sin_family = AF_INET;
 addr.sin_port = htons(6000);
 addr.sin_addr.S_un.S_addr = INADDR_ANY;

 if(::bind(sock,(SOCKADDR*)&addr, sizeof(addr)) == SOCKET_ERROR)  //绑定
 {
  cout<<"Failed bind()."<   return 0;
 }

 if(::listen(sock,5) == SOCKET_ERROR) //监听
 {
  cout<<"Failed listen()."<   return 0;
 }

 sockaddr_in clientAddr;
 SOCKET clientSock;
 int len = sizeof(clientAddr);
 char szTest[MAX_BUFFER]={0};

 clientSock = ::accept(sock,(SOCKADDR*)&clientAddr,&len);  //接受
 if(clientSock == INVALID_SOCKET)
 {
  cout<<"Failed accept()!"<   return 0;
 }
 else
 {
  cout<<"接受到一个连接:  "<  }

 while(true)
 {
  cout<<"请输入数据:   ";
  cin>>szTest;
  ::send(clientSock, szTest, strlen(szTest),0);
  char szBuf[256] = {0}; 
  int len = ::recv(clientSock, szBuf,256,0);
  if(len > 0)
  {
   szBuf[len] = 0;
   cout<<"客户端说:   "<   }
  Sleep(100);
 }

 ::closesocket(clientSock);
 ::closesocket(sock);   //关闭套接字
 ::WSACleanup();   //释放网络资源
 getchar();
 return 0;
}

//WSAStartup socket accept bing listen 等函数详见帮助文档

客户端:
#include "stdafx.h"
#include
using namespace std;

#include
#pragma  comment(lib,"WS2_32.lib")

#define MAX_BUFFER 256
int _tmain(int argc, _TCHAR* argv[])
{
 WSADATA wsaData;
 WORD sockVersion = MAKEWORD(2,2);
 if(::WSAStartup(sockVersion,&wsaData))
  exit(0);
 SOCKET sock = ::socket(AF_INET, SOCK_STREAM, 0);
 if(sock == SOCKET_ERROR)
 {
  cout<<"Fail socket()."<   return 0;
 }

 sockaddr_in addr;
 addr.sin_family = AF_INET;
 addr.sin_port = htons(6000);
 addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

 if(::connect(sock,(SOCKADDR*)&addr, sizeof(addr)) == -1)
 {
  cout<<"Failed connect()!"<   return 0;
 }

 char szTest[MAX_BUFFER]={0};
 while(true)
 {
  char szBuf[256] = {0}; 
  int len = ::recv(sock, szBuf,256,0);
  if(len > 0)
  {
   szBuf[len] = 0;
   cout<<"服务器说:   "<   }
  cout<<"请输入数据:   ";
  cin>>szTest;
  ::send(sock, szTest, strlen(szTest),0);
  Sleep(100);
 }
 
 ::closesocket(sock);
 ::WSACleanup();
 getchar();
 return 0;
}

由于:accept,recv,send等函数式阻塞式的，所指只能你一句，我一句那样通话