test1.cpp

服务器和客户端通信1111111111111111111111111111

// UDP_Winsock_API_Server_5000.cpp : Defines the entry point for the console application.
//

//#include "stdafx.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include <winsock2.h>
#define socklen_t	int
#pragma comment(lib, "wsock32.lib")

//SOCKET sock；
sockaddr_in serv;
int addlen,s=1;
char buff[100];


int main(int argc, char* argv[])
{
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
 
	wVersionRequested = MAKEWORD( 2, 2 );
 
	err = WSAStartup( wVersionRequested, &wsaData );
	if ( err != 0 ) {
	    /* Tell the user that we could not find a usable */
	    /* WinSock DLL.                                  */
	    return 1;
	}
 
	/* Confirm that the WinSock DLL supports 2.2.*/
	/* Note that if the DLL supports versions greater    */
	/* than 2.2 in addition to 2.2, it will still return */
	/* 2.2 in wVersion since that is the version we      */
	/* requested.                                        */
 
	if ( LOBYTE( wsaData.wVersion ) != 2 ||
	        HIBYTE( wsaData.wVersion ) != 2 ) {
	    /* Tell the user that we could not find a usable */
	    /* WinSock DLL.                                  */
	    WSACleanup( );
	    return 1; 
	}
 
	/* The WinSock DLL is acceptable. Proceed. */
	SOCKET sock;
	char* buf="Client A speeking",buf1[1000];
	int len,flags = MSG_DONTROUTE,k=0;
	sock=socket(AF_INET,SOCK_DGRAM,0);
//	serv.sin_addr.s_addr=htonl(INADDR_ANY);
	serv.sin_addr.s_addr=inet_addr("127.0.0.1");
	serv.sin_family=AF_INET;
	serv.sin_port=3000;//htons(5000);
	addlen=sizeof(serv);
	while(k++<2 && (len=strlen(buf))>0){
		if(sendto( sock,  buf,  len,  flags,  (sockaddr*)&serv,  addlen)<0)
		{
			printf("\n发送错误:%d\n",WSAGetLastError());
			return 0;
		}
		printf("\n发送成功");
		if(recvfrom( sock,  buf1,  1000,  0,  (sockaddr*)&serv,  &addlen)<0)
		{
			printf("\n接收错误:%d\n",WSAGetLastError());
			//return 0;
		}
		printf("\nserver say:%s",buf1);
	//	scanf("%s",buf);
	}
//	if (bind(sock,(sockaddr*)&serv,addlen))
//	{
//		printf("\n绑定错误:%d\n",WSAGetLastError());
//	}else
//	{
//		printf("\n服务器创建成功\n");
//	//开始侦听	
//		while(s!=0)
//			{
//				s=recv(sock,buff,100,0);
//				printf("\n%s",buff);
//			}
//		send(dlg->msgsock[msgcount],"Disconnected",100,0);
//	}
	closesocket(sock);
	scanf("%s",buf);
	return 0;
}