sockclient.c

这是一个用c语言和MiniGUI工具编写的数据采集服务器程序

#include "sockclient.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>


extern serv_addr[16];
extern struct sockaddr_in addr;
extern int sockfd;
extern int serv_port;
extern HWND hclient;


void initsocket(void)
{

	struct hostent *host;

	if((host=gethostbyname(serv_addr))==NULL)
	{
		MessageBox(NULL, "gethostbyname error", "aa", MB_OK);
		return;
	}

	if((sockfd=socket(AF_INET, SOCK_STREAM, 0))==-1)
	{
		
		MessageBox(NULL, "socket error", "aa", MB_OK);
		return;
	}

	fcntl(sockfd, F_SETFL, O_NONBLOCK);

	addr.sin_family=AF_INET;
	addr.sin_port=htons(serv_port);
	addr.sin_addr=*((struct in_addr*)host->h_addr);
	bzero(&(addr.sin_zero), 8);

	connect(sockfd, (struct sockaddr*)&addr, sizeof(struct sockaddr)); 
	
		int file = open("addrname", O_CREAT | O_RDONLY, 0600);
		char name[18];
		memset(name, 0, 18);	
		int n = read(file, name, 18);
		if( n != 18 ) 
			send(sockfd, STR_NAME, 14, 0 ); 
		else 
			send(sockfd, name, 18, 0 );
		close(file);

		char *buf=(char*)malloc(50);
		memset(buf, '\0', 50);

		fd_set fdset;
		struct timeval tv;
		tv.tv_sec=4;
		tv.tv_usec=0;
		
		FD_ZERO(&fdset);
		FD_SET(sockfd, &fdset);
		while(FD_ISSET(sockfd, &fdset))
			{
			if(select(sockfd+1, &fdset, NULL, NULL, &tv)<0)
				perror("select");
			else
				{
				if(FD_ISSET(sockfd, &fdset))
					{
					if(7 == recv(sockfd, buf, 7, MSG_WAITALL)) perror("recv");
		
					SetDlgItemText(hclient, 2, "connected");
					free(buf);
					return;
					}
				else
					SetDlgItemText(hclient, 2, "no connect");
					return;
				}	
			}
		


	

	return;

}