set.c

这是一个 在S3C44B0板子,基于UClinux的网络传输程序,send.c是发送AD采集的数据(SEND.C带有AD采集程序).SET.C是设置程序比如采集时间等等.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>

#define SERVER_PORT  20000
#define QUEUE_LENGTH   20
#define MAXLEN 100

typedef struct 
{
	char ip[16];
	char netmask[16];
	char gateway[16];
	char SeverIP[16];
	int DelayTime;
	char id[21];
	char localserverip[16];
} eth0_set;
	
//全局变量定义
eth0_set netset;

//把接收过来的配置参数写如文件
void  writefile()
{
		char wbuf[150];
	   FILE *fp;
	   char *dir;
		char fpathname[MAXLEN];
		char strdelaytime[10];
		memset(wbuf,0,sizeof(wbuf));
		dir="/mnt/";
		
		strcpy(wbuf,netset.ip);
		strcat(wbuf,"\n");
		strcat(wbuf,netset.netmask);
		strcat(wbuf,"\n");
		strcat(wbuf,netset.gateway);
		strcat(wbuf,"\n");
		strcat(wbuf,netset.SeverIP);
		strcat(wbuf,"\n");
		sprintf(strdelaytime,"%d",netset.DelayTime);
		strcat(wbuf,strdelaytime);
		strcat(wbuf,"\n");
		strcat(wbuf,netset.localserverip);
		strcat(wbuf,"\n");
		strcat(wbuf,netset.id);
		strcat(wbuf,"\n");
		strcpy(fpathname,dir);
		strcat(fpathname,"temp");
		fp=fopen(fpathname,"w");
		if(fp!=NULL){
			fwrite(wbuf,strlen(wbuf),1,fp);
			printf("write set-file success\n");
			fclose(fp);
		}
		else {
			printf("cannot open set-file\n");
		}	
}

void set()
{
	int newfd;
	struct sockaddr_in setaddr;	
	int length=sizeof(setaddr);
	int sockset;

	setaddr.sin_family=AF_INET;
	setaddr.sin_port=htons(SERVER_PORT);
	setaddr.sin_addr.s_addr=INADDR_ANY;
	bzero(&(setaddr.sin_zero),8);

	sockset=socket(AF_INET,SOCK_STREAM,0);
	if(bind(sockset,(struct sockaddr *)&setaddr,length)<0){
		perror("bind");
		exit(1);
		
	}
	if((listen(sockset,QUEUE_LENGTH))<0){
		perror("listening");
		exit(1);
	}	
	while(1){
		if((newfd=accept(sockset,(struct sockaddr*)&setaddr,&length))<0){
			if(errno==EINTR)
				continue;	
			else
				perror("accept");			
		} 
		memset(&netset,0,sizeof(eth0_set)); 		
	   recv(newfd,(char *)&netset,sizeof(eth0_set),0);
		writefile();
		close(newfd);
	}
}

//main begin
int main(int argc,char **argv)
{			
		set();
		return 0;
}
//main end