usage of t_flush_flags() in event_route - sr-users

26 May 2015

Hi Daniel and others,
I'm having a problem with acc module if I'm using the event_route/
branch-failure:
say, the call comes from the app server and goes to the registered user.
We arm the the failure route and per-branch failure route for the 302
redirect from the UA. We explicitly reset the accounting flags because
we don't want to account the calls from the app server. The transaction
is created implicitly by the t_relay().

Now if the UA responds with the 302 response and we are going to process
that, we want to create an acc record for the new target from 302
message because this call may incur additional costs. I'm setting the
accounting flags and calling t_flush_flags() but that doesn't work (no
accounting record). Any idea if I'm doing something wrong or maybe
there's a bug when changing the flags and then calling t_flush_flags
from the event_route?

Here are the module parameters:

modparam("acc", "early_media", 0)
modparam("acc", "report_ack", 0)
modparam("acc", "report_cancels", 1)
modparam("acc", "detect_direction", 1)
modparam("acc", "db_flag", 1)
modparam("acc", "db_missed_flag", 2)
modparam("acc", "failed_transaction_flag", 3)
modparam("acc", "db_url", PAIR_URL)
modparam("acc", "db_extra",
"src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd")
modparam("acc", "multi_leg_info",
"src_leg=$avp(i:901);dst_leg=$avp(i:902)")
modparam("acc", "time_mode", 2)
modparam("acc", "time_attr", "time_hires")
modparam("acc", "cdr_log_enable", 0)

FTR, we tried 4.1.6 and 4.1.8.

And here is the event route (with flags defined like this:
 flags  FLAG_ACC_DB:1, FLAG_ACC_MISSED:2, FLAG_ACC_FAILED:3, ...):

event_route[tm:branch-failure:redirect]
{
    route(ROUTE_STOP_RTPPROXY_BRANCH);
    if($T_rpl($rs) == 301 || $T_rpl($rs) == 302)
    {
        # initialise variables when entering failure route
        route(ROUTE_INITVARS);

        # these need to be avps because we need it in reply/failure-route
        $(avp(s:from_faxserver)[*]) = 0;
        $(avp(s:to_faxserver)[*]) = 0;
        $(avp(s:cf_from_pstn)[*]) = 0;
        $(avp(s:from_pstn)[*]) = 0;
        $(avp(s:proxylu_from_pstn)[*]) = 0;
        $(avp(s:lcr_flags)[*]) = 0;
        $(avp(s:em_call)[*]) = 0;
        $(avp(s:from_pbx)[*]) = 0;
        $(avp(s:p_to_device)[*]) = 0;
        $(avp(s:p_to_group)[*]) = 0;
        $(avp(s:is_primary)[*]) = 0;

        # now let's process a 30x
        $(avp(s:acc_state)[*]) = "cfb";
        $(avp(s:orig_acc_caller_user)[*]) = $avp(s:acc_caller_user);
        $(avp(s:orig_acc_caller_domain)[*]) = $avp(s:acc_caller_domain);
        $(avp(s:acc_caller_user)[*]) = $avp(s:acc_callee_user);
        $(avp(s:acc_caller_domain)[*]) = $avp(s:acc_callee_domain);
        $(avp(s:caller_uuid)[*]) = $avp(s:callee_uuid);
        $(avp(s:callee_uuid)[*]) = $null;
        # the $var(no_acc) is 0 at this point but the flags may have
been reset
        # if this is a call from PBX user - we do want accounting for
the 302 redirect
        if(isflagset(FLAG_ACC_DB)) {
            xlog("L_NOTICE", "++++++ ACC flag is set - [% logreq
-%]\n");
        } else {
            xlog("L_NOTICE", "------ ACC flag is NOT set - [% logreq
-%]\n");
        }
        setflag(FLAG_ACC_FAILED);
        setflag(FLAG_ACC_DB);
        t_flush_flags();

        # get last URI from destination-set and set it as R-URI
        $var(contact) = $T_rpl($ct);
        $var(contact) = $(var(contact){nameaddr.uri});
        if($var(contact) == 0 || $var(contact) == $null)
        {

            xlog("L_ERROR", "Failed to fetch contact '$ct' from
301/302
- [% logreq -%]\n");
            acc_db_request("480", "acc");
            $var(announce_handle) = "callee_tmp_unavailable";
            $var(announce_set) = $xavp(callee_real_prefs[0]=>sound_set);
            $(avp(s:announce_code)[*]) = 480;
            $(avp(s:announce_reason)[*]) = "Temporarily Unavailable";
            route(ROUTE_EARLY_REJECT);
        }
        $ru = $var(contact);
        xlog("L_NOTICE", "Redirect from UAC intercepted - [% logreq
-%]\n");
        $(avp(s:forwarder_cli_userprov)[*]) = $T_rpl($tU);
        $(avp(s:forwarder_domain_userprov)[*]) = $T_rpl($td);
        $var(forward) = 1;
        $var(redirected_forward) = 1;
        route(ROUTE_LOAD_CALLER_PREF);
        route(ROUTE_FIND_CALLEE);
    }
}

Thanks.

Andrew