[Serusers] use_dns_cache and call forwarding

[caio]

Hi Miklos,
This happens only when I try to do a call to a subcriber having
forwarding enabled.

Normal calls success ok. I'm not sure about the append_branch() usage
and how to work with 'on busy' and 'no answer' forwarding features.

Thanks your comments..

Claudio

On Thu, Jul 24, 2008 at 4:58 AM, Miklos Tirpak <miklos at iptel.org> wrote:
> Hi,
>
> On 07/23/2008 05:22 PM, caio wrote:
>>
>> Hi guys,
>> I have a problem with call forwarding (on busy or not answer).., the
>> call fall into the failure_route(1) block, and AVP checking and pushto
>> does its job.
>>
>> Here a snipped of code of failure_route(1) (flag 27 means call fwd if
>> no answer):
>>
>>        if (isflagset(27) && t_check_status("408")) { # if fwd no
>> answer is set and reply msg is 408
>>
>>                if (avp_pushto("$ruri", "s:fwdnoanswer")) {
>>                        avp_delete("s:fwdnoanswer");
>>                        resetflag(27);
>>
>>                        avp_print();
>>
>>                        log(1, "LOG: --> appending new branch...");
>>                        if (!append_branch()){
>>                                t_reply("500", "Too many branches?!");
>>                                drop;
>>                        }
>>
>>                        log(1, "LOG: --> Calling route_6...");
>>                        route(6);
>>                        break;
>>
>> Route(6) finally calls route(1), where t_relay is called.
>> But have a dns failure..and the call never is forwarded.
>>
>> == ser.log ==
>>
>> DEBUG: mk_proxy: doing DNS lookup...
>> get_record: lookup(_sip._udp.wsa.lab, 33) failed_
>> sip_resolvehost: no SRV record found for wsa.lab, trying 'normal'
>> lookup..._
>> check_via_address(190.244.33.5, 190.244.33.5, 0)_
>> ERROR: udp_send: sendto(sock,0x2ab32599c720,910,0,0x2ab325999e68,16):
>> Operation not permitted(1)_
>> msg_send: ERROR: udp_send failed_
>> ERROR: t_forward_nonack: sending request failed_
>> DEBUG: add_to_tail_of_timer[4]: 0x2ab325999e80_
>> DEBUG: add_to_tail_of_timer[0]: 0x2ab325999ea0_
>> ERROR: w_t_relay (failure mode): forwarding failed_
>>
>> A question regarding this trouble.....Can I disable use_dns_cache ?
>> SER version is 0.9.7.
>
> there is no DNS cache in version 0.9.x as I recall, but anyway, your problem
> does not seem to be related to DNS, but to the UDP message sending: SER
> fails to send out the UDP packet, "Operation not permitted". Is there no
> firewall or routing problem at the proxy side?
>
> Miklos
>
>> What do you recommend?
>> If you need my ser.cfg I can paste it...
>>
>> Thanks..
>>
>



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caio



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caio