[Users] choosing transport according to message size

[Bogdan-Andrei Iancu]

If the package exceeds the MTU limit should be a problem - the TCP/IP 
stack must take care of UDP fragmentation. Of course, there are some 
crappy hardphones that never heard of such think :(.

regards,
bogdan

JF wrote:

> Thanks for your answer.
>
> This is a real problem when there are several SIP hops adding Vias and
> Record-Routes, especially with INVITEs carrying SDPs as large as 700
> bytes... Messages easily grow bigger than the MTU.
> Is there a recommended way of handling this using openser? Anyone else
> facing this kind of problems? The safest way is to use always TCP...
>
> JF
>
> On 5/10/06, Bogdan-Andrei Iancu <bogdan at voice-system.ro> wrote:
>
>> Hi,
>>
>> no, there is no way to figure out the size of the outgoing package. The
>> only automatic protocol selection is via NSPTR records (if the target
>> has such records) - please see the SIP location for this.
>>
>> also you can choose the proto via the script.
>>
>> regards,
>> bogdan
>>
>> JF wrote:
>>
>> > Hi all,
>> >
>> > Is there any function in openser that selects the transport protocol
>> > (TCP or UDP) according to the message size? E.g. if the message going
>> > out is bigger than MTU, use TCP... or does the script writer have to
>> > take this into account every time a relaying function is called?
>> > Also, in this second case, is the actual outgoing message size
>> > available in the script (i.e. after lumps are applied)?
>> >
>> > Thanks in advance,
>> >
>> > JF
>> >
>> > _______________________________________________
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>> > Users at openser.org
>> > http://openser.org/cgi-bin/mailman/listinfo/users
>> >
>> >
>>
>>