"481 Dialog/Transaction Does Not Exist" after sending SUBSCRIBE with Expires: 0 - sr-users

13 Apr 2019

When a client sends a SUBSCRIBE with Expires: 0, Kamailio responds correctly with a
"202 OK".

But then Kamailio sends a NOTIFY to the same client with "Subscription-State:
terminated;reason=timeout".
The client rejects this NOTIFY with a "481 Dialog/Transaction Does Not Exist".
Why does Kamailio send this NOTIFY, and is there any way to fix or disable it because
it's always rejected by the client?
The client is IMSDroid, and Kamailio is 5.2.2 with a default configuration.

Packet 1 = Client sending SUBSCRIBE with Expires: 0

SUBSCRIBE sip:X.X.X.X:443;transport=tcp SIP/2.0Via: SIP/2.0/TCP
192.168.0.21:45336;branch=z9hG4bK-670576127From:
<sip:username@domain.com>;tag=1372208921To:
<sip:kamailio.domain.com>;tag=c4eb72dabf44e7588b972bd3b454ea11-0cd6Contact:
<sip:username@192.168.0.21:45336;transport=tcp>Call-ID:
e8cffa8f-948d-eb99-69ca-c9f18bdf11a0CSeq: 1321654295 SUBSCRIBEExpires: 0Content-Length:
299Max-Forwards: 70Allow: INVITE, ACK, CANCEL, BYE, MESSAGE, OPTIONS, NOTIFY, PRACK,
UPDATE, REFERAccept: application/pidf+xmlEvent: presence

Packet 2 = Kamailio responding with 202 OK

SIP/2.0 202 OKVia: SIP/2.0/TCP 192.168.0.21:45336;branch=z9hG4bK-670576127From:
<sip:username@domain.com>;tag=1372208921To:
<sip:kamailio@domain.com>;tag=c4eb72dabf44e7588b972bd3b454ea11-0cd6Call-ID:
e8cffa8f-948d-eb99-69ca-c9f18bdf11a0CSeq: 1321654295 SUBSCRIBEExpires: 0Contact:
<sip:X.X.X.X:443;transport=tcp>Server: kamailio (5.2.2
(x86_64/linux))Content-Length: 0

Packet 3 = Kamailio sending a NOTIFY

NOTIFY sip:username@192.168.0.21:45336;transport=tcp SIP/2.0Via: SIP/2.0/TCP
X.X.X.X:443;branch=z9hG4bKefe7.5f8ec435000000000000000000000000.0To:
<sip:username@domain.com>;tag=1372208921From:
<sip:kamailio@domain.com>;tag=c4eb72dabf44e7588b972bd3b454ea11-0cd6CSeq: 3
NOTIFYCall-ID: e8cffa8f-948d-eb99-69ca-c9f18bdf11a0Content-Length: 0Max-Forwards: 70Event:
presenceContact: <sip:X.X.X.X:443;transport=tcp>Subscription-State:
terminated;reason=timeout

Packet 4 = Client responding to the NOTIFY with "481 Dialog/Transaction Does Not
Exist"

SIP/2.0 481 Dialog/Transaction Does Not ExistVia: SIP/2.0/TCP
X.X.X.X:443;branch=z9hG4bKefe7.5f8ec435000000000000000000000000.0From:
<sip:kamailio@domain.com>;tag=c4eb72dabf44e7588b972bd3b454ea11-0cd6To:
<sip:username@domain.com>;tag=1372208921Call-ID:
e8cffa8f-948d-eb99-69ca-c9f18bdf11a0CSeq: 3 NOTIFYContent-Length: 0

There are two entries in the Kamailio log:

INFO: {1 1321654295 SUBSCRIBE e8cffa8f-948d-eb99-69ca-c9f18bdf11a0} presence
[notify.c:1614]: send_notify_request(): NOTIFY sip:username@domain.com via
sip:Y.Y.Y.Y:45336;transport=tcp on behalf of sip:kamailio.domain.com for event presence :
e8cffa8f-948d-eb99-69ca-c9f18bdf11a0
ERROR: {2 3 NOTIFY e8cffa8f-948d-eb99-69ca-c9f18bdf11a0} presence [subscribe.c:497]:
delete_subs(): Failed to delete subscription from memory [slot: 174 ev:
sip:kamailio.domain.com pu: presence ci: e8cffa8f-948d-eb99-69ca-c9f18bdf11a0 ft:
1372208921 tt: c4eb72dabf44e7588b972bd3b454ea11-0cd6]

These are the presence settings in the Kamailio config file:

#!ifdef WITH_PRESENCE# ----- presence params -----modparam("presence",
"db_url", DBURL)modparam("presence", "send_fast_notify", 0)
# ----- presence_xml params -----modparam("presence_xml", "db_url",
DBURL)modparam("presence_xml", "force_active",
1)modparam("presence_xml", "force_dummy_presence", 0)#!endif

Appreciate your help.