16 Apr
2008
16 Apr
'08
2:58 p.m.
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.