[SR-Users] is_in_subnet & Multiple CIDR subnets

[Daniel Tryba]

On Monday 13 January 2014 13:06:56 jay binks wrote:
> So Im looking at a way of implementing IP Network ACL's in kamailio..
> 
> block all except specific subnets etc..
> 
[multiple cidrs]
> 
> is there a benevolent kamailio developer on the list who is able to add
> this simple feature for me ?

I'm using mysql to do this, but a little math makes it work from any source. 
usr_preference contains stuff like 0.0.0.0/0 or something stricter, implicit 
denies for users without acl records.

route[ACL]
{
        if(!avp_db_query("select value from usr_preferences where 
username='$au' and attribute='acl' and 
inet_aton(substring_index(value,'/',1))&(1 << 32) - 1 & ~((1 << (32 - 
substring_index(value,'/',-1))) - 1)=inet_aton('$si')&(1 << 32) - 1 & ~((1 << 
(32 - substring_index(value,'/',-1))) - 1)"))
        {
                sl_send_reply("403", "Not Allowed by ACL");
                exit;
        }

        return;
}


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