[Users] choosing transport according to message size

[Bogdan-Andrei Iancu]

Hi,

t_relay should stick only to relaying, without any intelligence for 
where and how - this should be in the script.

regards,
bogdan

JF wrote:

> Thanks, this did the trick! I had to add msg:len checks whenever
> t_relay is called. When incoming request is larger than X (e.g. 1300)
> bytes we force sending over TCP so that no UDP fragmentation occurs.
> Wouldn't it make sense to handle this automatically inside t_relay? or
> via a modparam such as "force_tcp_size_limit"...
>
> JF
>
> On 5/11/06, Bogdan-Andrei Iancu <bogdan at voice-system.ro> wrote:
>
>> an alternative will be just to append the "transport=tcp" parameter to
>> RURI or DST_URI  if you do not want to change the RURI.
>>     see http://openser.org/docs/modules/1.1.x/uri.html#AEN118
>>
>> regards,
>> bogdan
>>
>> JF wrote:
>>
>> > Also, we cannot use the t_relay() function with no params if we want
>> > to force transport proto, we have to use
>> > t_relay("[proto:]host[:port]"), and specify a host in the script. Am I
>> > right? Is there another way to force the proto?
>> >
>> > Thanks in advance.
>> >
>> > JF
>> >
>> > On 5/11/06, JF <jfkavaka at gmail.com> 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
>> >> > >
>> >> > > _______________________________________________
>> >> > > Users mailing list
>> >> > > Users at openser.org
>> >> > > http://openser.org/cgi-bin/mailman/listinfo/users
>> >> > >
>> >> > >
>> >> >
>> >> >
>> >>
>>
>>