AW: [Serusers] Setting maxfwd to 1 in single SER env?

Daniel-Constantin Mierla daniel at voice-system.ro
Mon Sep 12 22:13:21 CEST 2005


On 09/12/05 22:41, Frank Fischer wrote:

>Hi Daniel
>
>Thanks for your answer. But i don't undestand why i would need the avp
>module to do that - couldn't i just set something like 
>
>if (!mf_process_maxfwd_header("1")) {
>...
>};
>
>As far as i understood, the mf_process_maxfwd_header() method compairs the
>given value (i.e. 1) to theactual value in the request?
>
No, please see the readme file of the module. It adds a maxfwd header 
with the value given as parameter, if there is no maxfwd header. If the 
header already exists, it compares the value decremented with one against 0.

> So my question is,
>in my setup with only one SER Proxy with some UAs and a PSTN Gateway and no
>forwaring or receiving from other SIP Proxies, would it make sense to set
>there parameter for max_hops to 1 or am I missing something and this might
>cause probles?
>  
>
Be sure you do not do local loops. Otherwise, besides doing extra 
processing  (remove+add header) to change the value of maxfwd to 1, 
there should not be any harm.

Daniel

>Greetings
>Frank
>
>
>
>  
>
>>-----Ursprüngliche Nachricht-----
>>Von: Daniel-Constantin Mierla [mailto:daniel at voice-system.ro] 
>>Gesendet: Montag, 12. September 2005 18:14
>>An: Frank Fischer
>>Cc: serusers at lists.iptel.org
>>Betreff: Re: [Serusers] Setting maxfwd to 1 in single SER env?
>>
>>Hello,
>>
>>depending on what version of proxy do you have, you can use 
>>avpops (write the value of the maxfwd header in an avp and 
>>then compare). See: 
>>http://www.voice-system.ro/docs/avpops/
>>
>>Daniel
>>
>>
>>On 09/12/05 15:38, Frank Fischer wrote:
>>
>>    
>>
>>>Hi
>>>
>>>I have a single SER wiht some clients and a PSTN gateway. Forwarding 
>>>calls over the internet to other SIP proxies is not 
>>>      
>>>
>>possible/allowed. 
>>    
>>
>>>Now i wonder, if i could compare the 
>>>      
>>>
>>mf_process_maxfwd_header() with 1 
>>    
>>
>>>since - if i understand that concept right - there will 
>>>      
>>>
>>always only be 
>>    
>>
>>>one hop needed (eihter client to client or client to pstn gateway).
>>>
>>>Do i get this right or am i missing anything important?
>>>
>>>Greetings
>>>Frank
>>>
>>>
>>>_______________________________________________
>>>Serusers mailing list
>>>serusers at lists.iptel.org
>>>http://lists.iptel.org/mailman/listinfo/serusers
>>>
>>> 
>>>
>>>      
>>>
>
>
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>
>  
>




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