[sr-dev] where is s proxy_challenge function?

[Andrei Pelinescu-Onciul]

On Jul 01, 2010 at 22:30, Juha Heinanen <jh at tutpro.com> wrote:
> Juha Heinanen writes:
> 
> > i see that this thing in the code builds the challenge (p-a header):
> > 
> > 	if (ret < 0) {
> > 	    if (auth_api.build_challenge(msg, (cred ? cred->stale : 0), realm, NULL, NULL, hftype) < 0) {
> > 		ERR("Error while creating challenge\n");
> > 		ret = -2;
> > 	    }
> > 
> > is there a way to prevent p-a header from being added to reply in case
> > after proxy_authorize failure i want to reply with "403 Forbidden"
> > instead of "407 Proxy Authentication Required"?
> 
> jan,
> 
> i was able to figure this out.  auth_api.build_challenge stores the
> header in a variable that defaults to $digest_challenge.  however, when
> i write in config file as you suggested:
> 
>             if (defined $digest_challenge && $digest_challenge != "") {
>                 append_to_reply("%$digest_challenge");
>             };
>             send_reply("407", "Proxy Authentication Required");
> 
> i get these errors to syslog:
> 
> Jul  1 22:24:54 localhost /usr/sbin/sip-proxy[26750]: ERROR: <core> [mod_fix.c:246]: Cannot convert function parameter 1 to0
> Jul  1 22:24:54 localhost /usr/sbin/sip-proxy[26750]: ERROR: <core> [route.c:1088]: fixing failed (code=-1) at cfg:/etc/sip-proxy/sip-proxy.cfg:1019
> Jul  1 22:24:54 localhost /usr/sbin/sip-proxy[26750]: ERROR: <core> [route.c:1088]: fixing failed (code=-1) at cfg:/etc/sip-proxy/sip-proxy.cfg:1020
> Jul  1 22:24:54 localhost /usr/sbin/sip-proxy[26750]: ERROR: <core> [route.c:1088]: fixing failed (code=-1) at cfg:/etc/sip-proxy/sip-proxy.cfg:1023
> Jul  1 22:24:54 localhost /usr/sbin/sip-proxy[26750]: ERROR: <core> [route.c:1088]: fixing failed (code=-1) at cfg:/etc/sip-proxy/sip-proxy.cfg:1042
> 
> what does % mean in "%$digest_challenge"?


That's used for passing format string to ser textops/append_to_reply. It
means what follows should be interpreted in a special way (avp, select,
xlog format). E.g.: append_to_reply("Foo: %$my_var \n\r");

If you use k textops skip the "%" (you should be able to use directly
 $digest_challenge).


Andrei