Re: [SR-Users] Trouble with 302 Redirect

Try doing this in a failure_route[]; onreply_route[] isn't really meant to transform replies, just to passively observe or drop them.

Also, you'll want to use append_to_reply():

https://kamailio.org/docs/modules/5.3.x/modules/textops.html#textops.f.appen...

Note that the conditions that give rise to the invocation of a failure_route are broader and somewhat more abstract than any given SIP reply -- e.g. transaction reply timeouts. So, you would want to structure your failure_route like this:

failure_route[REDIRECT_HANDLE] { if(t_is_canceled()) exit;

if(t_branch_timeout()) { # Handle the timeout case... exit; }

# Use $T_rpl to access reply code ($rs) and reply reason if needed # ($rs), per: # # https://www.kamailio.org/wiki/cookbooks/5.3.x/pseudovariables#t_rpl_pv

if($T_rpl($rs) == 486) { append_to_reply("Contact: sip:...\r\n"); t_reply("302", "Moved Temporarily"); exit; }

# Some other case. }

-- Alex

On Thu, Jan 16, 2020 at 03:54:54PM -0500, Jim Leahy wrote:

Hi All, I'm having some issues trying to properly send a '302 Moved Temporarily' reply to the calling UAC (UAC1) when the remote UAC (UAC2) returns a 486 status (Do Not Disturb). The goal is to redirect UAC1 to a voicemail server when UAC2 is in DND. Here are the pertinent parts of my config:

route { # drop some things right away route(DROP);

    # perform sanity check
    route(SANITYCHECK);

    # handle registrations
    if(is_method("REGISTER")) {
            route(REGISTRATION);
            exit;
    }

    # handle invites
    if(is_method("INVITE")) {
            route("INVITE");
            exit;
    }

    route(RELAY);

}

route[INVITE] { # add this proxy to the record-route so it stays in the loop record_route();

    # if we can find this user in the location DB...
    if(lookup("location")) {
            # relay the invite to the new dURI
            t_on_failure("FOURDIGITFAIL");
            t_on_reply("FOURDIGITREPLY");
            route(RELAY);
            # go back to the main route
            return;
    }

onreply_route[FOURDIGITREPLY] { if(t_check_status("4[0-9]{2}")) { t_reply("302", "Moved Temporarily"); } }

I'm having issues with the t_reply in the onreply_route. It successfully sends the reply, but I can't seem to set the Contact header properly. I'm trying to set it to the location of the user's mailbox on the voicemail sever (ie sip:1000@vmpbx.domain.com), but nothing I try works. I've tried: remove_hf("Contact"); insert_hf("Contact: sip:1000@vmpbx.domain.com"); t_reply("302", "Moved Temporarily");

But as I understand it, that just changes the header in the reply from UAC2, not the reply I'm sending to UAC1

Then I tried: append_to_reply("Contact: sip:1000@vmpbx.domain.com" ); t_reply("302", "Moved Temporarily");

But I can't use append_to_reply in an onreply block. How can I change the Contact header in the reply that's sent? Am I just going about this the wrong way? Any help would be appreciated. Thanks

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