#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>

struct authfree_configure
{
    char name[32]; //免认证规则名称
    uint32_t sip;  //免认证规则源ip
    uint32_t dip;  //免认证规则目的ip
    int dport;     //免认证规则目的端口号
    time_t begin_time; //有效时间范围的起始时间
    time_t over_time;  //有效时间范围内的结束时间
};
 
//判断IPv4格式是否正确
int isIpV4Addr(const char *ipAddr)
{
    int ip_part_1 = 0;
    int ip_part_2 = 0;
    int ip_part_3 = 0;
    int ip_part_4 = 0;
    char end_char = 0;  
    if((NULL == ipAddr) || (0 == strlen(ipAddr)))
    {
        return -1;
    }  
    if(4 == sscanf(ipAddr,"%d.%d.%d.%d%c",&ip_part_1,&ip_part_2,&ip_part_3,&ip_part_4,&end_char))
    {
        if((ip_part_1 >= 0) && (ip_part_1 <= 255) &&
           (ip_part_2 >= 0) && (ip_part_2 <= 255) &&
           (ip_part_3 >= 0) && (ip_part_3 <= 255) &&
           (ip_part_4 >= 0) && (ip_part_4 <= 255) 
        )
        {
            return 0;
        }
    }  
    return -1;
}


//判断免认证规则是否有效,所有条件有效则返回值为0，其中一项条件无效则返回值为1
int _valid_authfreerule(struct authfree_configure *s)
{
    char sstr[32];
    inet_ntop(AF_INET, (void *)&s->sip, sstr, 32);
    char *sip_addr = sstr;
    if(!isIpV4Addr(sip_addr))
    {    
        char dstr[32];
        inet_ntop(AF_INET, (void *)&s->dip, dstr, 32);
        char *dip_addr = dstr;
        if(!isIpV4Addr(dip_addr))
         {
            time_t lt;
            lt = time(NULL);
            if( (memcmp(&s->sip, &s->dip, 32) < 0)  & (lt >= s->begin_time) & (lt <= s->over_time))
            {  
                return 0;   
            }
            else
            {
                return -1;
            }     
        }
        else
        {
            return -1;
        }
    }
    else
    {
        return -1;
    }    
}