[SR-Users] How to correctly answer a PnP-SUBSCRIBE message
Daniel-Constantin Mierla
miconda at gmail.com
Mon Mar 30 19:01:51 CEST 2020
Hello,
On 30.03.20 18:41, Jan-Hendrik Dörner wrote:
> Hello Daniel,
>
> thank you for your reply.
>
> I changed the line mentioned to
> t_uac_send("NOTIFY", "$(ct{s.substr,1,0}{s.striptail,1})", "$su",
> "192.168.1.156","Call-ID: $hdr(Call-ID)\r\nSubscription-State:
> terminated;reason=timeout\r\nEvent: $hdr(Event)\r\nContent-Type:
> application/url\r\nFrom: $fU\r\nTo: $hdr(From)",
> "http://server.conf/settings-{mac}
> <http://server.conf/settings-%7Bmac%7D>");
>
> the result is:
> 3) Call-ID is fine now ; Problem solved :-)
OK.
>
> 1) The Via IP is now changed to the IP and port of the server, but not
> to the IP of the phone.
Actually that is the correct value, Via is the address of the entity
sending out the request. It is used to route the replies, so Via in
Notify has to be the address of the kamailio server so the reply to it
is sent by the phone back to Kamailio.
>
> 2) The sending interface / IP is not correct: It now sends _only_
> from the wrong IP !!
Can you try with full specs for socket, like "upd:IP:port"?
Cheers,
Daniel
> As a result, it repeats sending the NOTIFY-message over and over again
> since the message does not get to the phone ...
> Please see the starting of the SIP-traffic below
>
> U 192.168.1.152:57283 -> 224.0.1.75:5060 #53
> SUBSCRIBE sip:MAC%3a0004137120D8 at lan SIP/2.0.
> Via: SIP/2.0/UDP 192.168.1.152:57283;rport.
> From: <sip:MAC%3a0004137120D8 at lan>;tag=176419003.
> To: <sip:MAC%3a0004137120D8 at lan>.
> Call-ID: 277773303 at 192.168.1.152 <mailto:277773303 at 192.168.1.152>.
> CSeq: 1 SUBSCRIBE.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Expires: 0.
> Accept: application/url.
> Contact: <sip:192.168.1.152:57283>.
> User-Agent: snom760/8.9.3.80.
> Content-Length: 0.
> .
>
> #
> U 192.168.1.156:5060 -> 192.168.1.152:57283 #54
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 192.168.1.152:57283;rport=57283;received=192.168.1.152.
> From: <sip:MAC%3a0004137120D8 at lan>;tag=176419003.
> To:
> <sip:MAC%3a0004137120D8 at lan>;tag=fb721cde02dffb6bb099728401306798.1182.
> Call-ID: 277773303 at 192.168.1.152 <mailto:277773303 at 192.168.1.152>.
> CSeq: 1 SUBSCRIBE.
> Server: kamailio (5.2.5 (x86_64/linux)).
> Content-Length: 0.
> .
>
> #
> U 172.23.56.1:5060 -> 192.168.1.152:57283 #55
> NOTIFY sip:192.168.1.152:57283 SIP/2.0.
> Via: SIP/2.0/UDP
> 192.168.1.156:5060;branch=z9hG4bKee8f.0ea476a1000000000000000000000000.0.
> To: <sip:MAC%3a0004137120D8 at lan>;tag=176419003.
> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-9700.
> CSeq: 10 NOTIFY.
> Call-ID: 277773303 at 192.168.1.152 <mailto:277773303 at 192.168.1.152>.
> Max-Forwards: 70.
> Content-Length: 33.
> User-Agent: kamailio (5.2.5 (x86_64/linux)).
> Subscription-State: terminated;reason=timeout.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Content-Type: application/url.
> .
> http://server.conf/settings-{mac} <http://server.conf/settings-%7Bmac%7D>
> #
> U 172.23.56.1:5060 -> 192.168.1.152:57283 #56
> NOTIFY sip:192.168.1.152:57283 SIP/2.0.
> Via: SIP/2.0/UDP
> 192.168.1.156:5060;branch=z9hG4bKee8f.0ea476a1000000000000000000000000.0.
> To: <sip:MAC%3a0004137120D8 at lan>;tag=176419003.
> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-9700.
> CSeq: 10 NOTIFY.
> Call-ID: 277773303 at 192.168.1.152 <mailto:277773303 at 192.168.1.152>.
> Max-Forwards: 70.
> Content-Length: 33.
> User-Agent: kamailio (5.2.5 (x86_64/linux)).
> Subscription-State: terminated;reason=timeout.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Content-Type: application/url.
> .
> http://server.conf/settings-{mac} <http://server.conf/settings-%7Bmac%7D>
> #
> U 172.23.56.1:5060 -> 192.168.1.152:57283 #57
> NOTIFY sip:192.168.1.152:57283 SIP/2.0.
> Via: SIP/2.0/UDP
> 192.168.1.156:5060;branch=z9hG4bKee8f.0ea476a1000000000000000000000000.0.
> To: <sip:MAC%3a0004137120D8 at lan>;tag=176419003.
> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-9700.
> CSeq: 10 NOTIFY.
> Call-ID: 277773303 at 192.168.1.152 <mailto:277773303 at 192.168.1.152>.
> Max-Forwards: 70.
> Content-Length: 33.
> User-Agent: kamailio (5.2.5 (x86_64/linux)).
> Subscription-State: terminated;reason=timeout.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Content-Type: application/url.
> .
> http://server.conf/settings-{mac} <http://server.conf/settings-%7Bmac%7D>
> #
> U 192.168.1.152:57283 -> 224.0.1.75:5060 #58
> SUBSCRIBE sip:MAC%3a0004137120D8 at lan SIP/2.0.
> Via: SIP/2.0/UDP 192.168.1.152:57283;rport.
> From: <sip:MAC%3a0004137120D8 at lan>;tag=1472545741.
> To: <sip:MAC%3a0004137120D8 at lan>.
> Call-ID: 1886698335 at 192.168.1.152 <mailto:1886698335 at 192.168.1.152>.
> CSeq: 1 SUBSCRIBE.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Expires: 0.
> Accept: application/url.
> Contact: <sip:192.168.1.152:57283>.
> User-Agent: snom760/8.9.3.80.
> Content-Length: 0.
> .
>
> #
> U 192.168.1.156:5060 -> 192.168.1.152:57283 #59
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 192.168.1.152:57283;rport=57283;received=192.168.1.152.
> From: <sip:MAC%3a0004137120D8 at lan>;tag=1472545741.
> To:
> <sip:MAC%3a0004137120D8 at lan>;tag=fb721cde02dffb6bb099728401306798.1182.
> Call-ID: 1886698335 at 192.168.1.152 <mailto:1886698335 at 192.168.1.152>.
> CSeq: 1 SUBSCRIBE.
> Server: kamailio (5.2.5 (x86_64/linux)).
> Content-Length: 0.
> .
>
> #
> U 172.23.56.1:5060 -> 192.168.1.152:57283 #60
> NOTIFY sip:192.168.1.152:57283 SIP/2.0.
> Via: SIP/2.0/UDP
> 192.168.1.156:5060;branch=z9hG4bKa0df.967a0433000000000000000000000000.0.
> To: <sip:MAC%3a0004137120D8 at lan>;tag=1472545741.
> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-d106.
> CSeq: 10 NOTIFY.
> Call-ID: 1886698335 at 192.168.1.152 <mailto:1886698335 at 192.168.1.152>.
> Max-Forwards: 70.
> Content-Length: 33.
> User-Agent: kamailio (5.2.5 (x86_64/linux)).
> Subscription-State: terminated;reason=timeout.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Content-Type: application/url.
> .
> http://server.conf/settings-{mac} <http://server.conf/settings-%7Bmac%7D>
> #
> U 172.23.56.1:5060 -> 192.168.1.152:57283 #61
> NOTIFY sip:192.168.1.152:57283 SIP/2.0.
> Via: SIP/2.0/UDP
> 192.168.1.156:5060;branch=z9hG4bKa0df.967a0433000000000000000000000000.0.
> To: <sip:MAC%3a0004137120D8 at lan>;tag=1472545741.
> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-d106.
> CSeq: 10 NOTIFY.
> Call-ID: 1886698335 at 192.168.1.152 <mailto:1886698335 at 192.168.1.152>.
> Max-Forwards: 70.
> Content-Length: 33.
> User-Agent: kamailio (5.2.5 (x86_64/linux)).
> Subscription-State: terminated;reason=timeout.
> Event:
> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
> Content-Type: application/url.
> .
> http://server.conf/settings-{mac} <http://server.conf/settings-%7Bmac%7D>
> #
>
> (If I change the IP-parameter to "172.23.56.1" the resulting sending
> IP is unchanged!)
>
>
>
>> Am 30.03.2020 um 16:17 schrieb Daniel-Constantin Mierla
>> <miconda at gmail.com <mailto:miconda at gmail.com>>:
>>
>> Hello,
>>
>> On 30.03.20 12:07, Jan-Hendrik Dörner wrote:
>>> Hallo,
>>>
>>> several telephones send a SIP-multicast SUBSCRIBE message to address
>>> 224.0.1.75 if they have no settings-URL configured and receive none
>>> over DHCP.
>>>
>>> So I configure my kamailio server, to respond to that multicast-request.
>>> But: Although mine is working, I do feel it could be improved, since
>>> the NOTIFY packet send out is not quite as it should be …
>>>
>>> Here is what I did (the 172.23.56.1 is my voip-vlan-address)
>>>
>>> listen=udp:172.23.56.1:5060 advertise 192.168.1.156:5060
>>> listen=udp:192.168.1.156:5060 advertise 192.168.1.156:5060
>>> listen=tcp:127.0.0.1:5060
>>>
>>> mcast="eth0"
>>> listen=udp:224.0.1.75:5060
>>>
>>> ….
>>>
>>> if ($Ri == "224.0.1.75"){
>>> if(is_method("SUBSCRIBE")){
>>> xlog("L_INFO", "Received pnp-event from IP $si from
>>> User-Agent $hdr(User-Agent) und User $fU\r\n" );
>>>
>>> sl_send_reply("200", "OK");
>>>
>>> t_uac_send("NOTIFY", "$(ct{s.substr,1,0}{s.striptail,1})",
>>> "", "","Subscription-State: terminated;reason=timeout\r\nEvent:
>>> $hdr(Event)\r\nContent-Type: application/url\r\nFrom: $fU\r\nTo:
>>> $hdr(From)", "http://server.conf/settings-{mac}
>>> <http://server.conf/settings-%7Bmac%7D>");
>>> }else {
>>>
>>> xlog("L_INFO", "Drop message $rm from pnp-Interface \r\n" );
>>> }
>>> exit;
>>> }
>>>
>>>
>>> And here are the SIP-packets I see on my server (192.168.1.156)
>>> coming from my snom-phone (192.168.1.152).
>>> My problems with the NOTIFY -packets are:
>>> 1) How do I set the Via parameters to be the same as in the OK-reply?
>>
>> Try to set the next hop address to "$su" and combined with 2) maybe it
>> results in what you want to get.
>>
>>
>>> 2) How do I send out the NOTIFY only via the 192.168.1.156 network
>>> interface?
>>
>> Set the local socket parameter from where to send the NOTIFY.
>>
>>
>>> 3) May I send out the NOTIFY with the Call-ID from the SUBSCRIBE
>>> message? How?
>>
>>
>> Provide the Call-Id haeder as part of the headers parameter:
>>
>> -
>> https://www.kamailio.org/docs/modules/stable/modules/tm.html#tm.f.t_uac_send
>>
>> Cheers,
>> Daniel
>>
>>
>>>
>>> Any help is highly appreciated
>>> Jan-Hendrik
>>>
>>> #
>>> U 192.168.1.152:58714 -> 224.0.1.75:5060 #258
>>> SUBSCRIBE sip:MAC%3a0004137120D8 at lan SIP/2.0.
>>> Via: SIP/2.0/UDP 192.168.1.152:58714;rport.
>>> From: <sip:MAC%3a0004137120D8 at lan>;tag=1750588964.
>>> To: <sip:MAC%3a0004137120D8 at lan>.
>>> Call-ID: 1395386659 at 192.168.1.152 <mailto:1395386659 at 192.168.1.152>.
>>> CSeq: 1 SUBSCRIBE.
>>> Event:
>>> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
>>> Expires: 0.
>>> Accept: application/url.
>>> Contact: <sip:192.168.1.152:58714>.
>>> User-Agent: snom760/8.9.3.80.
>>> Content-Length: 0.
>>> .
>>>
>>> #
>>> U 192.168.1.156:5060 -> 192.168.1.152:58714 #259
>>> SIP/2.0 200 OK.
>>> Via: SIP/2.0/UDP 192.168.1.152:58714;rport=58714;received=192.168.1.152.
>>> From: <sip:MAC%3a0004137120D8 at lan>;tag=1750588964.
>>> To:
>>> <sip:MAC%3a0004137120D8 at lan>;tag=fb721cde02dffb6bb099728401306798.2f00.
>>> Call-ID: 1395386659 at 192.168.1.152 <mailto:1395386659 at 192.168.1.152>.
>>> CSeq: 1 SUBSCRIBE.
>>> Server: kamailio (5.2.5 (x86_64/linux)).
>>> Content-Length: 0.
>>> .
>>>
>>> #
>>> U 192.168.1.156:5060 -> 192.168.1.152:58714 #260
>>> NOTIFY sip:192.168.1.152:58714 SIP/2.0.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bKf21c.917eaf36000000000000000000000000.0.
>>> To: <sip:MAC%3a0004137120D8 at lan>;tag=1750588964.
>>> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-8cfb.
>>> CSeq: 10 NOTIFY.
>>> Call-ID: 24eaa8de01be1768-70960 at 172.23.56.1
>>> <mailto:24eaa8de01be1768-70960 at 172.23.56.1>.
>>> Max-Forwards: 70.
>>> Content-Length: 33.
>>> User-Agent: kamailio (5.2.5 (x86_64/linux)).
>>> Subscription-State: terminated;reason=timeout.
>>> Event:
>>> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
>>> Content-Type: application/url.
>>> .
>>> http://server.conf/settings-{mac}
>>> <http://server.conf/settings-%7Bmac%7D>
>>> #
>>> U 172.23.56.1:5060 -> 192.168.1.152:58714 #261
>>> NOTIFY sip:192.168.1.152:58714 SIP/2.0.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bKf21c.917eaf36000000000000000000000000.0.
>>> To: <sip:MAC%3a0004137120D8 at lan>;tag=1750588964.
>>> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-8cfb.
>>> CSeq: 10 NOTIFY.
>>> Call-ID: 24eaa8de01be1768-70960 at 172.23.56.1
>>> <mailto:24eaa8de01be1768-70960 at 172.23.56.1>.
>>> Max-Forwards: 70.
>>> Content-Length: 33.
>>> User-Agent: kamailio (5.2.5 (x86_64/linux)).
>>> Subscription-State: terminated;reason=timeout.
>>> Event:
>>> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
>>> Content-Type: application/url.
>>> .
>>> http://server.conf/settings-{mac}
>>> #
>>> U 172.23.56.1:5060 -> 192.168.1.152:58714 #262
>>> NOTIFY sip:192.168.1.152:58714 SIP/2.0.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bKf21c.917eaf36000000000000000000000000.0.
>>> To: <sip:MAC%3a0004137120D8 at lan>;tag=1750588964.
>>> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-8cfb.
>>> CSeq: 10 NOTIFY.
>>> Call-ID: 24eaa8de01be1768-70960 at 172.23.56.1.
>>> Max-Forwards: 70.
>>> Content-Length: 33.
>>> User-Agent: kamailio (5.2.5 (x86_64/linux)).
>>> Subscription-State: terminated;reason=timeout.
>>> Event:
>>> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
>>> Content-Type: application/url.
>>> .
>>> http://server.conf/settings-{mac}
>>> #
>>> U 192.168.1.152:58714 -> 224.0.1.75:5060 #263
>>> SUBSCRIBE sip:MAC%3a0004137120D8 at lan SIP/2.0.
>>> Via: SIP/2.0/UDP 192.168.1.152:58714;rport.
>>> From: <sip:MAC%3a0004137120D8 at lan>;tag=1971605806.
>>> To: <sip:MAC%3a0004137120D8 at lan>.
>>> Call-ID: 1846532696 at 192.168.1.152.
>>> CSeq: 1 SUBSCRIBE.
>>> Event:
>>> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
>>> Expires: 0.
>>> Accept: application/url.
>>> Contact: <sip:192.168.1.152:58714>.
>>> User-Agent: snom760/8.9.3.80.
>>> Content-Length: 0.
>>> .
>>>
>>> #
>>> U 192.168.1.156:5060 -> 192.168.1.152:58714 #264
>>> SIP/2.0 200 OK.
>>> Via: SIP/2.0/UDP 192.168.1.152:58714;rport=58714;received=192.168.1.152.
>>> From: <sip:MAC%3a0004137120D8 at lan>;tag=1971605806.
>>> To:
>>> <sip:MAC%3a0004137120D8 at lan>;tag=fb721cde02dffb6bb099728401306798.2f00.
>>> Call-ID: 1846532696 at 192.168.1.152.
>>> CSeq: 1 SUBSCRIBE.
>>> Server: kamailio (5.2.5 (x86_64/linux)).
>>> Content-Length: 0.
>>> .
>>>
>>> #
>>> U 192.168.1.156:5060 -> 192.168.1.152:58714 #265
>>> NOTIFY sip:192.168.1.152:58714 SIP/2.0.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bK201a.063839a4000000000000000000000000.0.
>>> To: <sip:MAC%3a0004137120D8 at lan>;tag=1971605806.
>>> From: <MAC%3a0004137120D8>;tag=da567df9df3ac234e43969a051db4641-f31b.
>>> CSeq: 10 NOTIFY.
>>> Call-ID: 24eaa8de01be1768-70963 at 172.23.56.1.
>>> Max-Forwards: 70.
>>> Content-Length: 33.
>>> User-Agent: kamailio (5.2.5 (x86_64/linux)).
>>> Subscription-State: terminated;reason=timeout.
>>> Event:
>>> ua-profile;profile-type="device";vendor="snom";model="snom760";version="8.9.3.80".
>>> Content-Type: application/url.
>>> .
>>> http://server.conf/settings-{mac}
>>> #
>>> U 192.168.1.152:58714 -> 192.168.1.156:5060 #266
>>> SIP/2.0 200 Ok.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bKf21c.917eaf36000000000000000000000000.0;received=192.168.1.156.
>>> From: <MAC:0004137120D8>;tag=da567df9df3ac234e43969a051db4641-8cfb.
>>> To: <sip:MAC%3A0004137120D8 at lan>;tag=1750588964.
>>> Call-ID: 24eaa8de01be1768-70960 at 172.23.56.1.
>>> CSeq: 10 NOTIFY.
>>> User-Agent: snom760/8.9.3.80.
>>> Content-Length: 0.
>>> .
>>>
>>> #
>>> U 192.168.1.152:58714 -> 192.168.1.156:5060 #267
>>> SIP/2.0 200 Ok.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bKf21c.917eaf36000000000000000000000000.0;received=192.168.1.156.
>>> From: <MAC:0004137120D8>;tag=da567df9df3ac234e43969a051db4641-8cfb.
>>> To: <sip:MAC%3A0004137120D8 at lan>;tag=1750588964.
>>> Call-ID: 24eaa8de01be1768-70960 at 172.23.56.1.
>>> CSeq: 10 NOTIFY.
>>> User-Agent: snom760/8.9.3.80.
>>> Content-Length: 0.
>>> .
>>>
>>> #
>>> U 192.168.1.152:58714 -> 192.168.1.156:5060 #268
>>> SIP/2.0 200 Ok.
>>> Via: SIP/2.0/UDP
>>> 224.0.1.75;branch=z9hG4bK201a.063839a4000000000000000000000000.0;received=192.168.1.156.
>>> From: <MAC:0004137120D8>;tag=da567df9df3ac234e43969a051db4641-f31b.
>>> To: <sip:MAC%3A0004137120D8 at lan>;tag=1971605806.
>>> Call-ID: 24eaa8de01be1768-70963 at 172.23.56.1.
>>> CSeq: 10 NOTIFY.
>>> User-Agent: snom760/8.9.3.80.
>>> Content-Length: 0.
>>> .
>>>
>>>
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing List
>>> sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>> --
>> Daniel-Constantin Mierla -- www.asipto.com <http://www.asipto.com/>
>> www.twitter.com/miconda
>> <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda
>> <http://www.linkedin.com/in/miconda>
>
>
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
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