tcp/ip 全双工会话(windows)

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1.服务器端

#include "stdafx.h"
#include <iostream>
using namespace std;

#include <WinSock2.h>
#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()."<<endl;
  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()."<<endl;
return 0;
}

if(::listen(sock,5) == SOCKET_ERROR) //监听
{
cout<<"Failed listen()."<<endl;
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()!"<<endl;
  return 0;
}
else
{
  cout<<"接受到一个连接: "<<inet_ntoa(clientAddr.sin_addr)<<endl;
}

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:   "<<szBuf<<endl;
  }
  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 <iostream>
using namespace std;

#include <WinSock2.h>
#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()."<<endl;
  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()!"<<endl;
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:   "<<szBuf<<endl;
  }
  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

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