[sr-dev] where is s proxy_challenge function?

[Jan Janak]

On Thu, Jul 1, 2010 at 3:30 PM, 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"?

Ohh, that is the syntax used by the xlog module. Behind the scenes,
the function append_to_reply calls a function from xlog module to
expand variable names in the string to corresponding values and then
the resulting string is appended to the reply.

Please load the xlog module and try again. I realize that requiring
xlog module for this type of stuff isn't particularly nice, but it is
a temporary solution until we have support for real "formatted"
strings, i.e., strings where occurrences of variables, PVs and selects
will be expanded transparently.

-Jan