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// server.cpp : Defines the entry point for the console application. 
// 
 
 
#include "stdafx.h" 
#include "winsock.h" 
#include "stdlib.h" 
#include "stdio.h" 
 
void usage(char *name) 
{ 
	fprintf(stderr, "usage: %s [port]\n", name); 
} 
 
int main(int argc,char *argv[]) 
{ 
	SOCKET servsock,clisock; 
	struct sockaddr_in sa; 
	struct sockaddr_in cliaddr; /* 存放返回的客户地址信息 */ 
	int len; 
	int err; 
	int servport = 5555; /* 默认服务端口 */ 
	char buff[256]; /* 存放时间/日期信息的缓冲区 */ 
	SYSTEMTIME st; 
	WSADATA wsd; 
	printf("************************************************************\n"); 
	printf("*time server sample,written by suyu,chenyu\n"); 
	printf("*mail:webants@163.com                    \n"); 
	printf("************************************************************\n"); 
    /* 处理命令行参数 */ 
	if (argc > 2) { 
		usage(argv[0]); 
		return -1; 
	} 
 
	if (argc == 2) { 
		servport = atoi(argv[1]); 
		if (servport > 65535 || servport < 1) { 
			usage(argv[0]); 
			return -2; 
		} 
	} 
 
	/* 初始化Winsock1.1 */ 
	if (WSAStartup(MAKEWORD(1,1), &wsd) != 0) { 
		printf("WSAStartup() failed !\n"); 
		return -3; 
	} 
 
	/* 创建套接字 */ 
printf("create socket ...\n"); 
	servsock = socket(AF_INET, SOCK_STREAM, 0); 
	if (servsock == INVALID_SOCKET) { 
		fprintf(stderr, "socket() failed: %d\n", WSAGetLastError()); 
		return -4; 
	} 
	printf("[OK]\n"); 
 
	/* 填充服务器地址结构 */ 
memset(&sa, 0, sizeof(sa)); 
	sa.sin_family			= AF_INET; 
	sa.sin_port				= htons(servport); 
	sa.sin_addr.S_un.S_addr	= htonl(INADDR_ANY); 
 
	/* 绑定套接字到服务器地址结构 */ 
printf("bind ...\n"); 
	err = bind(servsock, (const sockaddr *)&sa,sizeof(sa)); 
	if (err != 0) { 
		fprintf(stderr, "bind() failed: %d\n", WSAGetLastError()); 
		return -5; 
	} 
	printf("[OK]\n"); 
 
	/* 监听套接字 */ 
	printf("listen ...\n"); 
	err = listen(servsock,5); 
	if (err != 0) { 
		fprintf(stderr, "listen() failed: %d\n", WSAGetLastError()); 
		return -6; 
	} 
	printf("[OK]\n"); 
 
	/* 循环接受连接请求 */ 
	while(1) { 
		printf("wait request ...\n"); 
		len = sizeof(cliaddr); 
		clisock = accept(servsock, (struct sockaddr *)&cliaddr, &len); 
		if (clisock == INVALID_SOCKET) { 
			fprintf(stderr, "accept() failed: %d\n", WSAGetLastError()); 
			closesocket(servsock); 
			return -7; 
		} 
		 
		printf("accept client: %s:%d\n", inet_ntoa(cliaddr.sin_addr), ntohs(cliaddr.sin_port)); 
		GetLocalTime(&st); /* 得到本地时间/日期 */ 
		/* 为返回给客户整理时间/日期信息格式 */ 
		sprintf(buff,"YEAR : %u \nMONTH : %u \nDAY : %u \nHOUR: %u \nMINUTE : %u \nSECOND : %u \n", st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond); 
		send(clisock, buff, strlen(buff), 0); /* 发送给客户 */ 
		closesocket(clisock); /* 关闭与客户的连接 */ 
		printf("[server OK]\n"); 
	} 
	 
	closesocket(servsock); /* 关闭服务套接字 */ 
	WSACleanup(); /* 释放资源 */ 
	return 0; 
}