30 Dec
2022
30 Dec
'22
6:29 p.m.
Hi Brandon
Apologies if you have provided this but do you have a PCAP of the INVITE / 400 Bad Request
rather than the Pastebin of the INVITE
The last time I had this was because of a missing /r/n on the SDP granted it was not with
teams but still difficult to track down.
Also, what is the MTU Size, have you checked to see if the is causing packet fragmentation
and manifesting in a Bad Request.
Are there any clues in the Teams - Call Analytics.
Regards
Lewis
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Today's Topics:
1. Re: Direct Routing, SIP, INVITE TO TEAMS (400 BAD REQUEST)
(Brandon Armstead)
2. Re: Direct Routing, SIP, INVITE TO TEAMS (400 BAD REQUEST)
(Brandon Armstead)
----------------------------------------------------------------------
Message: 1
Date: Thu, 29 Dec 2022 12:15:16 -0800
From: Brandon Armstead <brandon(a)cryy.com>
Subject: [SR-Users] Re: Direct Routing, SIP, INVITE TO TEAMS (400 BAD
REQUEST)
To: Henning Westerholt <hw(a)gilawa.com>
Cc: "Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org>
Message-ID:
<CABAX3EoF+hfruLiV2Nh_g117_q8diaKxVEyp5hMFO=wyKbQidQ(a)mail.gmail.com>
Content-Type: multipart/alternative;
boundary="0000000000005692d905f0fd2538"
Henning,
There was no reply (reason) available in my case.
- Brandon
On Thu, Dec 29, 2022 at 11:48 AM Henning Westerholt <hw(a)gilawa.com> wrote:
Hello,
as mentioned before, have a look to the 400 reply reason phrase. This
was done quite good from their side, better than many other vendors.
Usually, Teams is not too bad if you are using a defined
infrastructure that do not introduce too many variables. We are
usually using a B2BUA in our customer projects for that purpose.
Cheers,
Henning
--
Henning Westerholt -
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fskal
atan.de%2Fblog%2F&data=05%7C01%7Clewis.hutchinson%40missionlabs.co.uk%
7Ce1670c8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%
7C0%7C0%7C638079553431377130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdat
a=QU%2BzOgPdbmRYh51a9PvptIvVjnTZrGxT8z1G7b2RRGQ%3D&reserved=0
Kamailio services -
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgila
wa.com%2F&data=05%7C01%7Clewis.hutchinson%40missionlabs.co.uk%7Ce1670c
8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%7C0%7C0%
7C638079553431377130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQI
joiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=PuDqkZ
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*From:* Brandon Armstead <brandon(a)cryy.com>
*Sent:* Thursday, December 29, 2022 7:52 PM
*To:* Kamailio (SER) - Users Mailing List
<sr-users(a)lists.kamailio.org>
*Subject:* [SR-Users] Re: Direct Routing, SIP, INVITE TO TEAMS (400
BAD
REQUEST)
Alex & Kaufman,
Appreciate the feedback. The pastebin is one example of about
1000+ iterations literally of changes. So I'm finally reaching out
:). I haven't tested the socket attribute in record-route change, I
will try this now. As for the angle brackets I've tried with and
without, etc (already) to no effect. The SDP unknown media type seems
to be a Poly thing, so I
*want* to rule this out as its not in my other SDP's and still receive
400 bad request.
One more iteration here we go... please feel free to let me know if
you have any other thoughts on the matter :).
Thanks!
- Brandon
On Thu, Dec 29, 2022 at 8:08 AM Alex Balashov
<abalashov(a)evaristesys.com>
wrote:
Yeah, the grammar says that rr-params are just generic-params, in
which case it's not. I didn't see that -- nicely spotted!
I think that may be the basis of the 400 Bad Request. I'd be shocked
if it weren't.
The broken clock of "Microsoft SIP" can still be right twice a day.
https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.e
varistesys.com%2F&data=05%7C01%7Clewis.hutchinson%40missionlabs.co.uk%
7Ce1670c8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%
7C0%7C0%7C638079553431377130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwM
DAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdat
a=hbww6wEEztE85YqxcN92bpMR%2BkiI9%2BE3jF1i6fQpjEk%3D&reserved=0,
https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.c
srpswitch.com%2F&data=05%7C01%7Clewis.hutchinson%40missionlabs.co.uk%7
Ce1670c8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%7
C0%7C0%7C638079553431377130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMD
AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata
=4E7a5ZxSvttBiMxl1VTtolmTvS4T5VGZHA00CsbPR2c%3D&reserved=0
On Dec 29, 2022, at 10:31 AM, Kaufman
<bkaufman(a)bcmone.com> wrote:
In your top Record-Route you have:
socket=;
Not sure if that is legal.
Kaufman
-----Original Message-----
From: Alex Balashov <abalashov(a)evaristesys.com>
Sent: Thursday, December 29, 2022 9:02 AM
To: Kamailio (SER) - Users Mailing List
<sr-users(a)lists.kamailio.org>
Subject: [SR-Users] Re: Direct Routing, SIP, INVITE TO TEAMS (400
BAD
REQUEST)
Sorry to hear you're having to interoperate with Teams. It's a
unique
form of sadism I wouldn't wish upon anyone.
A few theories:
1) Microsoft doesn't like the "bare" Contact header-value here:
Contact:
sip:+MY_FROM_PHONE_NUMBER_HERE@MY_FQDN_WAS_HERE:5061;transport=tls
Unlike the careted one right above:
P-Asserted-Identity:
<sip:+MY_FROM_PHONE_NUMBER_HERE@MY_FQDN_WAS_HERE>
A bare URI absent other header-params is of course completely legal,
but
I'm really trying to get inside the imaginary world of antisocial
"Microsoft SIP" here.
2) Could it be that antisocial "Microsoft SIP" sends 400 as a way of
objecting to something in the SDP, e.g. where a non-demented SIP stack
would send "488 Not Acceptable Here" or "415 Unsupported Media
Type"?
I know you've said you tried multiple clients to rule that out, but
I
wonder if the thing it's objecting to hasn't been ruled out that way.
3) I saw this media line in the SDP:
m=application 41356 <unknown media type>
What's that?
-- Alex
> On Dec 29, 2022, at 9:51 AM, Brandon Armstead <brandon(a)cryy.com> wrote:
>
> Outbound calls from my SBC into Teams (Polycom -> SBC -> Teams)
> always
result in a 400 BAD REQUEST.
> Example invite below:
> https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fn
> am11.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%25
> 2Fpast&data=05%7C01%7Clewis.hutchinson%40missionlabs.co.uk%7Ce1670c
> 8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%7C0%7
> C0%7C638079553431377130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA
> iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sda
> ta=5v20CvNnmdiHwfWMBX6tgjMlE1i2aKpFgTnuVFfpyl0%3D&reserved=0
> ebin.com%2FF1G1Ce59&data=05%7C01%7Cbkaufman%40bcmone.com%7C55672dbf
> 739
> a4ff447f008dae9b0c9b2%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C
> 638
> 079242759152531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjo
> iV2
> luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Cbff6B4g
> Nr8
> A9zs89smJ129y8IyNM9%2B3zVkGhlzpa54%3D&reserved=0
> I've taken care to make sure numbers are all E.164 format in
From/To/Contact. I've also taken care to make sure that FQDN is used
in Contact and Record-Route header.
> I've tried many different variations and
have followed the SIP
information here:
>
https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fn
> am11.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%25
> 2Flear&data=05%7C01%7Clewis.hutchinson%40missionlabs.co.uk%7Ce1670c
> 8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%7C0%7
> C0%7C638079553431377130%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA
> iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sda
> ta=ELk0UD1Pleq%2FG9j1%2BT18tiuFe0yjflimR9ztnW%2F7oPM%3D&reserved=0
> n.microsoft.com%2Fen-us%2Fmicrosoftteams%2Fdirect-routing-protocols
> -si
> p&data=05%7C01%7Cbkaufman%40bcmone.com%7C55672dbf739a4ff447f008dae9
> b0c
> 9b2%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C638079242759152531
> %7C
> Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6I
> k1h
> aWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=GO26A9FOOoS42yMCWPPGo5PkKo
> 75c
> kjSJSkjAeYRsU0%3D&reserved=0 I've also tried several different
> clients (Bria, Polycom CCX 600, Grandstream, etc) to see if maybe
> it was
something in the SDP or otherwise causing an issue.
> SIP Transport is TLS, RTP is SRTP
> I might also add that OPTION pings are active and Direct Routing
Endpoint is
active, so this is successful. I also am able to receive
calls FROM teams to my IP phone(s) without issue. It is only when I
try and call INTO teams (INVITE -> Microsoft Teams) that I always
receive a 400 BAD REQUEST to my INVITE.
> Any help is appreciated, thank you!
>
> - Brandon
>
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Ce1670c8a21444edf0ed408dae9f91fac%7C97c26f550a7a4661bd8f7b43b50d3f2b%7
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Lewis Hutchinson