[Bro] How to modify http.log

Vito Logrillo vitologrillo at gmail.com
Wed May 27 03:03:15 PDT 2015


Hi all,
i'm trying to modify http.log using the script written below

-----script.bro-----
redef record HTTP::Info += {
        host_ip: set[addr] &optional &log;
};

event connection_state_remove(c: connection) &priority=5
{
        local record_flag: bool = F;

        if  (/^[hH][tT][tT][pP]:/ in c$http$uri)
        {

                record_flag = T;

                when (local h = lookup_hostname(c$http$host))
                {
                        record_flag = F;
                        print(h);
                        if (|h|>0 && (0.0.0.0 !in h))
                        {
                                c$http$host_ip = h;
                                Log::write(HTTP::LOG, c$http);
                        }
                return;
                }
        }
        if (record_flag == T)
        {
                return;
        }
}

-----end script.bro----

I've added a new field in http.log (host_ip) in order to see the host
ip using the function lookup_hostname.
The script works well, but the same record is written twice (with and
without the host_ip field).
I've tried to use a state flag (record_flag) to avoid this, but the
result is the same.
How can avoid record duplicantion?
Thanks,
Vito


More information about the Bro mailing list