[Users] nathelper natping OPTIONS packets formated to not get reply?
Glenn Dalgliesh
glenn at routerboy.com
Fri Feb 10 00:26:18 CET 2006
Well sorry for the deal between post but wanted to find the time to run some
tests. Below is a table showing results of some tests I did related to which
clients response to options packets with and without username.
Overwhelmingly, UA's don't seem to respond to OPTIONS packets without
username. I have implemented a work around using AVP which is also below but
I thought you might want to see this based on my findings.
User_Agent No Username With Username
====================================================================
InstantVoice No Response OK
HT488 1.0.2.5 OK OK
Eyebeam 3004t No Response OK
X-Lite release 1103m No Response OK
X-Lite release 1105d No Response OK
20a/050106 No Response OK
Asterisk PBX OK OK
Cisco ATA 186 v3.1.0 Not Found OK
Cisco ATA 186 v3.2.0 Not Found OK
FXS_GW (1asipfxs.107b) OK OK
FXSO_GW No Response OK
Grandstream BT100 1.0.6.7 OK OK
Grandstream HT487 1.0.5.16 OK OK
Grandstream HT487 1.0.5.18 No Response OK
Grandstream HT487 1.0.6.7 No Response OK
Grandstream HT488 1.0.2.16 No Response Not Implemented
Grandstream HT496 1.0.0.8 No Response OK
Grandstream HT496 1.0.2.16 No Response OK & No Such Call
Linksys/PAP2-3.1.3(LS) No Response OK
SIP201 (lp201sip.101) OK OK
Sipura/SPA2000-2.0.13(g) Not Found OK
Sipura/SPA2002-3.1.2(a) Not Found OK
SJphone/1.50.271d (SJ Labs) No Response Method Not Allowed
SJphone/1.60.289a (SJ Labs) No Response Method Not Allowed
Welltech SipPhone V3.0 No Response OK
Welltech SipPhone V5809 No Response OK
I do the following before I save location to all registration packets. In
order to add username to the received field.
avp_subst("i:42","/(sip:)(.*)$/\1$fU@\2/");
-----Original Message-----
From: Bogdan-Andrei Iancu [mailto:bogdan at voice-system.ro]
Sent: Monday, January 23, 2006 7:00 AM
To: Glenn Dalgliesh
Cc: users at openser.org
Subject: Re: [Users] nathelper natping OPTIONS packets formated to not get
reply?
Hi,
indeed, if received uri is set, usrloc returns it received as contact
uri. Again, that's so due simplicity reasons.
On the other hand, an uri without username is a compliant SIP URI
(according to RFC).
I see no reasons for the TO to be rejected in this format.
Regards,
Bogdan
Glenn Dalgliesh wrote:
>Well actually the UA registers correctly and is reachable but natping seems
>to built the To hdr from the received field of the location table which
only
>has source ip and port of the registered packet and not the username
>
>
>Exmample of locations table entry:
>Username domain contact
>
>2120051099 sip:2120051099 at 172.16.1.1:5060
>received
>sip:111.16.187.102:5060
>
>The resulting natping packet from this would be
>
>U 2006/01/20 16:27:10.410848 111.15.13.67:5060 -> 111.16.187.102:5060
>
>/OPTIONS sip:111.16.187.102:5060 SIP/2.0./
>Via: SIP/2.0/UDP 111.15.13.67:5060;branch=0.
>From: sip:ping at intervoz.com.br;tag=ec30e9b7.
>To: sip:111.16.187.102:5060.
>Call-ID: b3fdcfa3-71a82db5-445151 at 111.15.13.67.
>CSeq: 1 OPTIONS.
>Content-Length: 0.
>
>As you can see if appears to use the received field.
>
>-----Original Message-----
>From: Bogdan-Andrei Iancu [mailto:bogdan at voice-system.ro]
>Sent: Friday, January 20, 2006 3:44 PM
>To: Glenn Dalgliesh
>Cc: users at openser.org
>Subject: Re: [Users] nathelper natping OPTIONS packets formated to not get
>reply?
>
>Hi Glenn,
>
>nathelper, when building the OPTIONS ping, for To hdr, the registered
>contact is used (due simplicity reasons). So the client seams to
>register contacts without username. interesting is why isn't it accept
>them back :).
>
>regards,
>bogdan
>
>Glenn Dalgliesh wrote:
>
>
>
>>I was looking at packet traces of the OPTIONS packets generated by
>>natping and it appears that at least in my implementation of OpenSer
>>1.0.0 the "To: sip" line has no username which causes many UA's
>>require in order to respond to the OPTIONS packet. I was wondering if
>>this was intentional or if it would be possible to change this
>>behavior or at least make it an configurable option. I think a lot
>>could be done/determined based on the results of the reply; including
>>determining if the packet is really reaching the UA. I realize that
>>some UA's may not support this feature but I think more do than not.
>>
>>Just my observations/thoughts. Please give me reasons for this being a
>>good or bad idea..
>>
>>*Current Packet:*
>>
>>U 2006/01/20 16:27:10.410848 111.15.13.67:5060 -> 111.16.187.102:5060
>>
>>/OPTIONS sip:111.16.187.102:5060 SIP/2.0./
>>
>>Via: SIP/2.0/UDP 111.15.13.67:5060;branch=0.
>>
>>From: sip:ping at intervoz.com.br;tag=ec30e9b7.
>>
>>To: sip:111.16.187.102:5060.
>>
>>Call-ID: b3fdcfa3-71a82db5-445151 at 111.15.13.67.
>>
>>CSeq: 1 OPTIONS.
>>
>>Content-Length: 0.
>>
>>*Suggested Packet:*
>>
>>U 2006/01/20 16:27:10.410848 111.15.13.67:5060 -> 111.16.187.102:5060
>>
>>/OPTIONS sip:*<username from location table>*@111.16.187.102:5060
>>SIP/2.0./
>>
>>Via: SIP/2.0/UDP 111.15.13.67:5060;branch=0.
>>
>>From: sip:ping at intervoz.com.br;tag=ec30e9b7.
>>
>>To: sip:111.16.187.102:5060.
>>
>>Call-ID: b3fdcfa3-71a82db5-445151 at 111.15.13.67.
>>
>>CSeq: 1 OPTIONS.
>>
>>Content-Length: 0.
>>
>>------------------------------------------------------------------------
>>
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>>
>>
>>
>>
>
>
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