server.cpp

socket通讯程序

#include"Winsock.h"
#include"Windows.h"
#include"stdio.h"
#pragma comment(lib,"wsock32.lib")
#define RECV_PORT 2000
#define SEND_PORT 3000

SOCKET sock,sock1;
SOCKADDR_IN ServerAddr;
SOCKADDR_IN ClientAddr;
int Addrlen;

DWORD StartSock()
{
   WSADATA WSAData;
   if(WSAStartup(MAKEWORD(2,2),&WSAData)!=0)  //初始化套接字
   {
	   printf("sock init fail!\n");
	   return(-1);
   }
   return(1);
}

DWORD CreateSocket()
{
	sock=socket(AF_INET,SOCK_STREAM,0);  //创建套接字
	if(sock==SOCKET_ERROR)
	{
		printf("sock create fail!\n");
		WSACleanup();
		return(-1);
	}
	ServerAddr.sin_family=AF_INET; //填充服务器地址及端口号
	ServerAddr.sin_addr.s_addr=htonl(INADDR_ANY);
	ServerAddr.sin_port=htons(RECV_PORT);
	if(bind(sock,(struct sockaddr FAR *)&ServerAddr,sizeof(ServerAddr))==SOCKET_ERROR)
	{
		printf("bind is the error");
		return(-1);
	}
	return(1);
}

DWORD ConnectProcess()
{
	char buff[80];
	Addrlen=sizeof(sockaddr_in);
	if(listen(sock,5)<0)
	{
		printf("listen error");
		return(-1);
	}
	printf("listening...\n");
	for(;;)
	{
		sock1=accept(sock,(struct sockaddr FAR *)&ClientAddr,&Addrlen);


	// int alen = sizeof(ServerAddr); 
      if(getpeername(sock1, (struct sockaddr *)&ClientAddr, &Addrlen )==0) 
	  {
      printf("对方IP：%s",inet_ntoa(ClientAddr.sin_addr));   

	  }

         for(;;)
		 {
			 memset(buff,0,80);
			 if(recv(sock1,buff,80,0)<=0)
			 {
				 break;
			 }
			 printf(buff);
			 printf("\n");
		 }
	}
}

int main()
{
	if(StartSock()==-1)
		return(-1);
    if(CreateSocket()==-1)
		return(-1);
    if(ConnectProcess()==-1)
		return(-1);

	return(1);
}