rules.c

在linux下的网络嗅探器 使用的是GTK2.0+GLADE做的前台 具体的后台是ANSI C 编译器 GCC

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include "rules.h"

char filter_app[1024] ;
FILE* fp = NULL;		//a pointer stick to ./rules/rule
char msg[1000] = {0};		//save the rules from ./rules/rule
int check_rules_from_file(char * rule_file)
{
	return 1 ;//check rules
}
int read_rules_from_file()
{
	

	fp = fopen("./rules/rule", "r+");
    	if(fp == NULL){
        	perror("fopen return error\n");
        	exit(1);
   	}	
	while(fgets(msg, sizeof(msg), fp)){
        if(msg[0] == '#' || msg[0] == '\n')
            continue;
        if(strlen(msg) <1)
            continue;
        if(msg[strlen(msg)-1] == '\n'){
            msg[strlen(msg)-1] = '\0';
        }
        if(msg[strlen(msg)-2] == '\r'){
            msg[strlen(msg)-1] = '\0';
        }
	}
	return 1 ;//read rules from file
}
/*
	int init_filter_app()
	{
		filter_app[1024]="" ;
	}
*/
int set_filter_app()
{
	strncpy(filter_app,msg,strlen(msg)) ;
	//just for test 
	//printf("\n\n%s\n\n",filter_app) ;
	return (filter_app == NULL)? 0:1;
}
int  read_statment_from_rules(void)
{
	//strncpy(filter_app,"++++++++++++++++++++++++",sizeof("++++++++++++++++++++++++")) ;
	
	return  (filter_app == NULL)? 0:1;//compile rules
}