[asterisk-users] Getting Asterisk to use the SIP Path header

Wed Jan 6 04:29:18 CST 2016

Hi,

How do I get asterisk to use the SIP Path header value from registrations
when calling devices?

I am trying to use opensips as a proxy for asterisk, when a client
registers I am adding the Path header before forwarding the REGISTER onto
asterisk. The problem is when asterisk recieves an INVITE it does not use
the value from the Path header, it is sending directly to the device. Can
anyone point me in the right direction as to why?

I am using asterisk 13.6.0 with the default configuration, the changes I
have made are:

In sip.conf I have uncommented:
supportpath=yes
rtsavepath=yes

In users.conf I have:

[6000]
secret =
host=dynamic
context = default

[6001]
secret =
host=dynamic
context = default

[6002]
secret =
host=dynamic
context = default

In extensions.conf I have made default like:
[default]
;include => demo
exten => 6000,1,Dial(SIP/6000,18)
exten => 6000,n,Hangup()

exten => 6002,1,Dial(SIP/6002,18)
exten => 6002,n,Hangup()

exten => 6001,1,Dial(SIP/6001,18)
exten => 6001,n,Hangup()

Below is the 6000 user REGISTER going from opensips (10.15.20.137:5060)
into asterisk (192.168.68.68:5070) with the Path header.

U 2016/01/06 10:04:23.399170 10.15.20.137:5060 -> 192.168.68.68:5070
REGISTER sip:10.15.20.137 SIP/2.0.
Via: SIP/2.0/UDP 10.15.20.137:5060;branch=z9hG4bKcc2c.b40fb511.0.
Via: SIP/2.0/UDP 10.15.20.53:52666
;received=10.15.20.53;branch=z9hG4bK-d8754z-91422161f08a7943-1---d8754z-;rport=52666.
Max-Forwards: 69.
Contact: <sip:6000 at 10.15.20.53:52666;rinstance=d4284982f7c18786>.
To: <sip:6000 at 10.15.20.137>.
From: <sip:6000 at 10.15.20.137>;tag=9e95da50.
Call-ID: OTQ1ZTdmZmE3OTM1ZWVkYzMzYWZiMDMzMDgyODhmOTU.
CSeq: 2 REGISTER.
Expires: 3600.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
SUBSCRIBE, INFO.
User-Agent: Bria 3 release 3.5.5 stamp 71243.
Content-Length: 0.

*Path: <sip:10.15.20.137;lr>.*
Below is the INVITE going from opensips to asterisk for 6000

U 2016/01/06 10:11:13.668929 10.15.20.137:5060 -> 192.168.68.68:5070
INVITE sip:6000 at 10.15.20.137;transport=UDP SIP/2.0.
Record-Route: <sip:10.15.20.137;lr;nat=yes>.
Via: SIP/2.0/UDP 10.15.20.137:5060;branch=z9hG4bK8f77.9d6ef7e7.0.
Via: SIP/2.0/UDP 188.39.51.2:35631
;rport=35631;received=10.15.20.53;branch=z9hG4bK-d8754z-d46f3a0333dc5d49-1---d8754z-.
Max-Forwards: 69.
Contact: <sip:6001 at 10.15.20.53:35631;transport=UDP>.
To: <sip:6000 at 10.15.20.137;transport=UDP>.
From: <sip:6001 at 10.15.20.137;transport=UDP>;tag=870fdf72.
Call-ID: YWVjN2VjMDZmYmZmNjg4MTE2MzJlZGU1ZDNjZGU2NDc..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO,
SUBSCRIBE.
Content-Type: application/sdp.
Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri.
User-Agent: Z 3.3.21933 r21903.
Allow-Events: presence, kpml.
Content-Length: 237.
.
v=0.
o=Z 0 0 IN IP4 188.39.51.2.
s=Z.
c=IN IP4 188.39.51.2.
t=0 0.
m=audio 8000 RTP/AVP 3 110 8 0 98 101.
a=rtpmap:110 speex/8000.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=sendrecv.

I would now expect asterisk to send the INVITE to the value of the Path
header in the registration (10.15.20.137:5060) however it is sending the
INVITE directly to the device (10.15.20.53:52666):

U 2016/01/06 10:11:13.671345 192.168.68.68:5070 -> *10.15.20.53:52666
<http://10.15.20.53:52666>*
INVITE sip:6000 at 10.15.20.53:52666;rinstance=d4284982f7c18786 SIP/2.0.
Via: SIP/2.0/UDP 192.168.68.68:5070;branch=z9hG4bK308a4ef5;rport.
Max-Forwards: 70.
Route: <sip:10.15.20.137;lr>.
From: "New User" <sip:6001 at 192.168.68.68:5070>;tag=as3daea415.
To: <sip:6000 at 10.15.20.53:52666;rinstance=d4284982f7c18786>.
Contact: <sip:6001 at 192.168.68.68:5070>.
Call-ID: 55202bc71f9e684d0b82c7cb2e8684ab at 192.168.68.68:5070.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 13.6.0.
Date: Wed, 06 Jan 2016 10:11:13 GMT.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
PUBLISH, MESSAGE.
Supported: replaces, timer, path.
Content-Type: application/sdp.
Content-Length: 286.
.
v=0.
o=root 887525354 887525354 IN IP4 192.168.68.68.
s=Asterisk PBX 13.6.0.
c=IN IP4 192.168.68.68.
t=0 0.
m=audio 12356 RTP/AVP 0 8 3 101.
a=rtpmap:0 PCMU/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:3 GSM/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=maxptime:150.
a=sendrecv.

Thanks,
Peter
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