[Freeswitch-users] Delay in Options Packets

[Mike Jerris]

Our code to handle options couldn’t be much simpler.  If you are seeing massive delays the only thing I would guess would be that there is some sort of massive ddos type attack causing significant queuing of inbound requests or a register storm and your registrations handlers are getting behind.  Take a look at logging and sip traffic around the same time for clues on what else might be happening on this sip profile at the same time.

> On Nov 25, 2019, at 12:22 PM, Jai Rangi <jprangi at gmail.com> wrote:
> 
> Hello,
> 
> Every now and then we see long delay in response for options. Example in the trace below free-switch took 44 seconds before it send 200 OK. 
> 
> What will be best way to troubleshoot this?
> 
> U 2019/11/25 10:49:27.185325 192.168.1.1:49020 <http://192.168.1.1:49020/> -> 192.168.1.5:5060 <http://192.168.1.5:5060/>
> OPTIONS sip:100000 at 192.168.1.5 <mailto:sip%3A100000 at 192.168.1.5> SIP/2.0.
> Via: SIP/2.0/UDP 192.168.2.1:49020;branch=z9hG4bKhjhs8ass877.
> Max-Forwards: 70.
> To: sip:100000 at 192.168.1.5 <mailto:sip%3A100000 at 192.168.1.5>.
> From: sip:1000 at 192.168.2.1:49020;tag=cbzxq0.
> Call-ID: hcrtfi at 192.168.2.1 <mailto:hcrtfi at 192.168.2.1>.
> CSeq: 1 OPTIONS.
> Accept: application/sdp.
> Content-Length: 0.
> .
> 
> U 2019/11/25 10:49:51.819959 192.168.1.5:5060 <http://192.168.1.5:5060/> -> 192.168.1.1:49020 <http://192.168.1.1:49020/>
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 192.168.2.1:49020;branch=z9hG4bKhjhs8ass877;received=192.168.1.1.
> From: <sip:1000 at 192.168.2.1:49020 <http://sip:1000@192.168.2.1:49020/>>;tag=cbzxq0.
> To: <sip:100000 at 192.168.1.5 <mailto:sip%3A100000 at 192.168.1.5>>;tag=aUUQj55rcetma.
> Call-ID: hcrtfi at 192.168.2.1 <mailto:hcrtfi at 192.168.2.1>.
> CSeq: 1 OPTIONS.
> Contact: <sip:192.168.1.5:5660 <http://192.168.1.5:5660/>>.
> User-Agent: Monitor.
> Accept: application/sdp.
> Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE.
> Supported: path, replaces.
> Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer.
> Content-Length: 0.
> 
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