Socket 服务端小程序

zhgw963852 2016-11-27 03:42:33

程序很简单就是想给客户端发送一点数据，这里发送的时时间字符串。
accept 函数不是阻塞的吗？程序到了accept不是应该停止等待连接吗？为什么我这个程序直接就过去了，得到了一个不正确的socket返回值。

#include <stdio.h>

#include <stdlib.h>

#include <WinSock2.h>

#define MAXSIZE  1024*2

#pragma comment(lib,"Ws2_32.lib")

int main()

{

	WSADATA wsaData;

	if (WSAStartup(MAKEWORD(2,2),&wsaData)!= 0)

	{

		printf("start error");

	}

	int len;

	SOCKADDR_IN serv_addr;

	SOCKADDR_IN l_addr;

	char recvmsg[MAXSIZE];

	SOCKET sServer,AcceptSocket;



	sServer = socket(PF_INET, SOCK_STREAM, 0);

	if (sServer < 0) {

		printf("socket error");

		return -1;

	}

	

	memset(&serv_addr,0,sizeof(serv_addr));

	serv_addr.sin_family = AF_INET;

	serv_addr.sin_port = htons(2016);

	serv_addr.sin_addr.s_addr =htonl(INADDR_ANY);



	if(bind(sServer, (SOCKADDR *)&serv_addr, sizeof(serv_addr))<0)

	{

		printf("bind err");

		return -1;

	}

	if(listen(sServer,5)==SOCKET_ERROR)

	{

		printf("Listen error!\n");

		return -1;

	}

	memset(&l_addr,0,sizeof(l_addr));

	AcceptSocket = accept(sServer,(SOCKADDR*)&l_addr,&len);

	while (1) {

	

		if(AcceptSocket >= 0 && AcceptSocket !=SOCKET_ERROR)

		{  

			printf("Now the link has been connected.\n");

			memset(recvmsg, 0, MAXSIZE);

			SYSTEMTIME sys;

			GetLocalTime(&sys);

			sprintf(recvmsg,"%4d%02d%02d-%02d%02d%02d",sys.wYear,sys.wMonth,sys.wDay,sys.wHour,sys.wMinute,sys.wSecond);

			if (!send(AcceptSocket,recvmsg,sizeof(recvmsg),0))

			{

				printf("send err!\n");

				break;

			}

		}

		else

		{

			printf("accept error!\n");

			continue;

		}

	

		Sleep(40);

	}

	closesocket(sServer);

	WSACleanup();

	return 0;

}