[sr-dev] [kamailio/kamailio] kazoo: wrong BLF when used application/dialog-info+xml (#1489)

[sergey-safarov]

Hello Luis @lazedo 
I found that kamailio is send BLF events to already disconnected Call-ID `bafd2f3d-d3a9-4c7d-be75-10fca3f358ca`.
Please looks packets 123, 125, 127, 196, 198.
And relevant CDR from kazoo
```
[root at node0 ~]# curl -s -S  'https://cust.ai.co.uk/v2/accounts/a9f80a9e89baec870641c904b45e8bdd/cdrs/201804-bafd2f3d-d3a9-4c7d-be75-10fca3f358ca'  -H 'X-Auth-Token: XXXXX' | jq -j '.data'
{
  "custom_channel_vars": {
    "account_id": "a9f80a9e89baec870641c904b45e8bdd",
    "authorizing_id": "dfa492e672c1c67d9c84d27415507a9f",
    "authorizing_type": "device",
    "bridge_id": "cad39f1f-be0f-1236-dba9-0242ac110006",
    "ecallmgr_node": "ecallmgr at kazoo-app02.cloudpbx.ai.co.uk",
    "inception": "442030263206 at cust.ai.co.uk",
    "owner_id": "1ac8f140e6bf1662ca0c901a04e93b07",
    "realm": "ai.cust.ai.co.uk",
    "username": "user_x4a5hv"
  },
  "to": "201 at ai.cust.ai.co.uk",
  "timestamp": 63691318804,
  "switch_url": "sip:mod_sofia at 31.28.75.195:11000",
  "switch_uri": "sip:31.28.75.195:11000",
  "switch_nodename": "freeswitch at freeswitch01.cloudpbx.ai.co.uk",
  "ringing_seconds": "0",
  "request": "user_x4a5hv at ai.cust.ai.co.uk",
  "presence_id": "201 at ai.cust.ai.co.uk",
  "other_leg_direction": "inbound",
  "other_leg_destination_number": "442030263206",
  "other_leg_caller_id_number": "03333444466",
  "other_leg_caller_id_name": "03333444466",
  "other_leg_call_id": "cad39f1f-be0f-1236-dba9-0242ac110006",
  "media_server": "freeswitch01.cloudpbx.ai.co.uk",
  "local_sdp": "v=0\r\no=FreeSWITCH 1524078566 1524078567 IN IP4 31.28.75.195\r\ns=FreeSWITCH\r\nc=IN IP4 31.28.75.195\r\nt=0 0\r\nm=audio 21038 RTP/AVP 0 101 13\r\na=rtpmap:0 PCMU/8000\r\na=rtpmap:101 telephone-event/8000\r\na=fmtp:101 0-16\r\na=rtcp:21039 IN IP4 31.28.75.195\r\na=rtpmap:13 CN/8000\r\na=ptime:20\r\na=sendrecv\r\n",
  "hangup_code": "sip:900",
  "hangup_cause": "NORMAL_UNSPECIFIED",
  "from": "03333444466 at ai.cust.ai.co.uk",
  "duration_seconds": "0",
  "custom_sip_headers": {
    "x_kazoo_invite_format": "username",
    "x_kazoo_aor": "sip:user_x4a5hv at ai.cust.ai.co.uk"
  },
  "channel_state": "REPORTING",
  "channel_name": "sofia/sipinterface_1/user_x4a5hv at ai.cust.ai.co.uk",
  "channel_created_time": 1524099604028605,
  "channel_call_state": "HANGUP",
  "caller_id_number": "03333444466",
  "caller_id_name": "03333444466",
  "callee_id_number": "+442030263201",
  "callee_id_name": "Henry Merrett",
  "call_direction": "outbound",
  "billing_seconds": "0",
  "call_id": "bafd2f3d-d3a9-4c7d-be75-10fca3f358ca",
  "node": "ecallmgr at kazoo-app01.cloudpbx.ai.co.uk",
  "msg_id": "1524099604028605",
  "event_name": "CHANNEL_DESTROY",
  "event_category": "call_event",
  "app_version": "4.0.0",
  "app_name": "ecallmgr",
  "interaction_id": "63691318785-9b1a9e0e",
  "interaction_key": "9b1a9e0e",
  "interaction_time": 63691318785,
  "id": "201804-bafd2f3d-d3a9-4c7d-be75-10fca3f358ca"
}
```
This call is `outbound` (b-leg) and disconnected with error `NORMAL_UNSPECIFIED` finished about 3 weeks ago. Call `billing_seconds` and `duration_seconds` is 0.

As you can see in this pcap kamailio not get any events from `ecallmgr` related to Call-ID `bafd2f3d-d3a9-4c7d-be75-10fca3f358ca` this is mean dialog state is maintained inside kamailio.
I will try locate Call-ID `bafd2f3d-d3a9-4c7d-be75-10fca3f358ca` in sqlite dump file.


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