【socket编程】一个简单的基于TCP的客户/服务端例子(vs2008)

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************************Tcp_client.cpp************************

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#include <stdio.h>
#include "WinSock2.h"
#pragma comment(lib,"ws2_32.lib")

SOCKET tcp_socket;
SOCKADDR_IN tcpAddr;
const int BufLen=1024;
char SendBuf[BufLen];

int main(int argc,char* argv[])
{
 WSADATA wsd;
 long int Addr;
 int Port;
 if(argc!=3){printf("Usage:%s [<IP> <Port>]\n",argv[0]);return 0;}
 Addr=inet_addr(argv[1]);
 Port=atoi(argv[2]);
 WSAStartup(MAKEWORD(2,2),&wsd);
 tcp_socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
 printf("Running in client mode(TCP)...\n");
 tcpAddr.sin_family=AF_INET;
 tcpAddr.sin_port=htons(Port);
 tcpAddr.sin_addr.s_addr=Addr;
 
 connect(tcp_socket,(LPSOCKADDR)&tcpAddr,sizeof(tcpAddr));

 while (1)
 {
  ZeroMemory(SendBuf,BufLen);
  fgets(SendBuf,BufLen,stdin);/*
  gets_s(SendBuf,BufLen);
  strcpy(SendBuf+strlen(SendBuf),"\n");*/
  send(tcp_socket,SendBuf,BufLen,0);
 }
 closesocket(tcp_socket);
 WSACleanup();   //释放套接字资源;
 return 1;
}

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***********************Tcp_service.cpp***********************

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#include <stdio.h>
#include "winsock2.h"
#pragma comment(lib,"ws2_32.lib")

SOCKET tcp_service_socket=INVALID_SOCKET;
SOCKADDR_IN tcpServiceAddr;
const int BufLen=1024;
char RecvBuf[BufLen];
SOCKET tcp_client_socket=INVALID_SOCKET;
SOCKADDR_IN tcpClientAddr;

int main()
{
 WSADATA wsd;
 int Port=8000;
 WSAStartup(MAKEWORD(2,2),&wsd);
 tcp_service_socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
 tcpServiceAddr.sin_family=AF_INET;
 tcpServiceAddr.sin_port=htons(Port);
 printf("Running in service mode(TCP)...\n");
 bind(tcp_service_socket,(LPSOCKADDR)&tcpServiceAddr,sizeof(tcpServiceAddr));
 listen(tcp_service_socket,1);

 int size=sizeof(tcpClientAddr);
 tcp_client_socket=accept(tcp_service_socket,(sockaddr FAR*)&tcpClientAddr,&size);
 while (1)
 {
 /* if (tcp_client_socket==INVALID_SOCKET)
  {
   Sleep(1000);
   continue;
  }*/
  recv(tcp_client_socket,RecvBuf,BufLen,0);
  printf("Received:%s\n",RecvBuf);
 }
 closesocket(tcp_client_socket);
 closesocket(tcp_service_socket);
 WSACleanup();  //释放套接字资源
 return 1;
}

【点评】这是一个非常粗糙的例子，在实际应用中还需要做很多修改。