[OpenSER-Users] OpenSer closes TCP connection if receives wrong data

[Bogdan-Andrei Iancu]

Hi Iñaki,

This is more a question for the devel list :).  Well, as TCP is stream 
oriented, you need a way to separate the SIP messages from the stream 
(in UDP this is simple as each package caries only one message); so, in 
TCP, you heavily relay on Content-Len hdr which tells you the len of the 
package; and if there is a parse error and the current message could not 
be properly delimited, it will quite difficult to synchronize back and 
delimit the following messages. So, the beset way to re-synchronize is 
to close the connection :).

Regards,
Bogdan


Iñaki Baz Castillo wrote:
> Hi, if OpenSer receives a request via TCP with wrong data (for example Via 
> missing) it closed automatically the connection. I'm just experimenting with 
> SIP TCP and I'd like to know the reason for this behaviour, I know that many 
> SIP TCP UAS's have not this behaviour.
> I also know that other UAS's dissallow empty lines before the message (so 
> disracrd the message) while OpenSer do allow them.
>
> Any explanation/recomendation is welcome. Are those recommendation for a SIP 
> TCP stack written in some RFC?
>
> Thanks a lot.
>
>
>