So far, yes. But to be 100% you need to check via a pcap the
fragmentation flags in the IP packet(s) for the SIP INVITE. This will
tell you (1) if the packet is fragmented and (2) if all the IP packets
(UDP fragments) are present.
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 17.05.2016 20:07, Nabeel wrote:
In that case, the answer to your question seems to be that the UDP
packets did not reach the OpenSIPS server, because nothing was added
to the OpenSIPS logs using debug level 4. All of this seems to point
to the cause being UDP packet fragmentation. Is this correct?
On 17 May 2016 4:24 pm, "Bogdan-Andrei Iancu" <[email protected]
<mailto:[email protected]>> wrote:
The TCP/IP stack of your server may decide to drop an UDP packet
if it cannot re-assemble it correctly (like not all the IP
fragments were received).
In such a case, you see the IP packets (carrying the fragments) on
network level, but they are never delivered at application level.
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 17.05.2016 16:05, Nabeel wrote:
The next question - is this INVITE reaching your opensips
script ? to be sure that the OS delivers the UDP packet to
the opensips application.
I don't have any firewall on my server. Why would the UDP packet
get blocked between entering the server and reaching opensips
script? The opensips server is running without errors. Other
calls work fine.
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