[Kamailio-Users] Rogue UAC: location database not updated

[Daniel-Constantin Mierla]

Hello,

On 10/15/08 11:27, CSB wrote:
>> Oct 14 15:59:58 beta /sbin/openser[32535]: ERROR:core:parse_from_header:
>>     
> bad from header
>   
>> Oct 14 15:59:58 beta /sbin/openser[32535]: ERROR:core:pv_get_from_attr:
>>     
> cannot parse From header
>   
>> Oct 14 15:59:58 beta /sbin/openser[32535]: ERROR:core:parse_from_header:
>>     
> bad from header
>   
>> Oct 14 15:59:58 beta /sbin/openser[32535]: ERROR:core:pv_get_from_attr:
>>     
> cannot parse From header
>   
>> This seems to have been caused by one rogue UAC and has the effect of
>>     
> preventing entries being written to the location database. 
>   
>> My question: could anyone suggest how to prevent a UAC which is sending
>>     
> some weird data from causing the server to choke?
>
> To replicate this issue, in a SPA2102 or similar enter the following data:
> in the Proxy field
>   
>> domain.com
>>     
> in the outbound proxy field
> domain.com
> i.e. prefix the domain with >
>
> The REGISTER message:
> REGISTER sip:>domain.com SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.112:5060;branch=z9hG4bK-a6a8f8f6
> From: $user <sip:12345678@>domain.com>;tag=51d182cf9ed176f3o0
> To: $user <sip:12345678@>domain.com>
> Call-ID: 363d0b66-60522e90 at 127.0.0.1
> CSeq: 22061 REGISTER
> Max-Forwards: 70
> Contact: $user <sip:12345678 at 192.168.1.112:5060>;expires=360
> User-Agent: Linksys/SPA3102-5.1.7(GW)
> Content-Length: 0
> Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
> Supported: x-sipura, replaces
>
> Could anyone suggest how to better handle this scenario
this should not prevent the other REGISTER messages to be processed 
properly, as I understood from your fist email.

Try to add

error_route {
    exit;
}

It should stop processing the sip message when the first parsing error 
happens. you can try sending a 400 Bad request before, but in this case 
might fail as well.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla
http://www.asipto.com