### Description
We have 3 registrar servers storing location information in memory only. The
registrations are replicated between each other using DMQ/DMQ USRLOC. When one
of these registrars processes a registration it is saved and then replicated to
the remaining two nodes.
When nat pinging is enabled then all three of these registrars attempt to send
options pings to the endpoints. Ideally, only the registrar that serviced the
registration should be sending the ping out.
I see that there is a core parameter to set the server_id for each server, and
I also see that nathelper has a "filter_server_id" parameter as well, however,
this appears to only work in database mode, it does not work with in memory
mode. Would it be possible to extend this to work for in-memory mode too?
### Troubleshooting
Module definitions
registrar
```
modparam("registrar", "method_filtering", 1)
modparam("registrar", "case_sensitive", 1)
modparam("registrar", "append_branches", 0)
modparam("registrar", "use_path", 1)
modparam("registrar", "path_mode", 0)
modparam("registrar", "path_use_received", 1)
modparam("registrar", "path_check_local", 1)
modparam("registrar", "max_contacts", 1)
```
usrloc
```
modparam("usrloc", "db_mode", 0)
modparam("usrloc", "use_domain", 1)
modparam("usrloc", "timer_interval", 60)
modparam("usrloc", "timer_procs", 4)
modparam("usrloc", "nat_bflag", 6)
```
nathelper
NOTE: force_socket is set to match each registrar server
```
modparam("nathelper", "natping_interval", 20)
modparam("nathelper", "natping_processes", 4)
modparam("nathelper", "ping_nated_only", 0)
modparam("nathelper", "sipping_from", "sip:[email protected]")
modparam("nathelper", "sipping_method", "OPTIONS")
modparam("nathelper", "sipping_bflag", 6)
modparam("nathelper", "force_socket", "10.7.0.189:5060")
modparam("nathelper", "udpping_from_path", 1)
```
Kamailio listen directives:
NOTE: These are set to match the interfaces on each registrar
```
listen=udp:10.6.0.189:5060
listen=udp:10.7.0.189:5060
listen=tcp:10.6.0.189:80
```
dmq
```
modparam("dmq", "server_address", DMQ_ADDRESS)
modparam("dmq", "notification_address", DMQ_NOTIFY_ADDRESS)
modparam("dmq", "multi_notify", 1)
modparam("dmq", "num_workers", 4)
```
dmq_usrloc
```
modparam("dmq_usrloc", "enable", 1)
```
#### Reproduction
Using the settings above, when the location information is replicated to a
server, the servers that are replicated to should not send options messages for
that AOR, only the registrar that serviced the registration should send nat
keepalives out.
#### Log Messages
#### SIP Traffic
Here is the traffic from the registrar that serviced the registration, this is
expected and working:
```
U 2017/11/02 07:50:54.191717 10.7.0.190:5060 -> 10.7.0.186:5062
OPTIONS
sip:[email protected]:39808;rinstance=d74acdb581467154;transport=UDP
SIP/2.0.
Via: SIP/2.0/UDP 10.7.0.190:5060;branch=z9hG4bK5526436.
Route: <sip:10.7.0.186:5062;lr;received=sip:212.2.172.228:39808>.
From: sip:[email protected];tag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781.
To:
sip:[email protected]:39808;rinstance=d74acdb581467154;transport=UDP.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Content-Length: 0.
.
U 2017/11/02 07:50:54.192896 194.213.29.33:5062 -> 212.2.172.228:39808
OPTIONS
sip:[email protected]:39808;rinstance=d74acdb581467154;transport=UDP
SIP/2.0.
Max-Forwards: 10.
Record-Route:
<sip:194.213.29.33:5062;r2=on;lr;ftag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781>.
Record-Route:
<sip:10.7.0.186:5062;r2=on;lr;ftag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781>.
Via: SIP/2.0/UDP
194.213.29.33:5062;branch=z9hG4bK13ab.9ccb0733fcecc331893d95f2e09485ee.0.
Via: SIP/2.0/UDP 10.7.0.190:5060;rport=5060;branch=z9hG4bK5526436.
From: sip:[email protected];tag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781.
To:
sip:[email protected]:39808;rinstance=d74acdb581467154;transport=UDP.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Content-Length: 0.
.
U 2017/11/02 07:50:54.248234 212.2.172.228:39808 -> 194.213.29.33:5062
SIP/2.0 200 OK.
Via: SIP/2.0/UDP
194.213.29.33:5062;branch=z9hG4bK13ab.9ccb0733fcecc331893d95f2e09485ee.0.
Via: SIP/2.0/UDP 10.7.0.190:5060;rport=5060;branch=z9hG4bK5526436.
Record-Route:
<sip:194.213.29.33:5062;r2=on;lr;ftag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781>.
Record-Route:
<sip:10.7.0.186:5062;r2=on;lr;ftag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781>.
Contact: <sip:192.168.1.64:39808>.
To:
<sip:[email protected]:39808;rinstance=d74acdb581467154;transport=UDP>;tag=726ffa30.
From: sip:[email protected];tag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Accept: application/sdp, application/sdp.
Accept-Language: en.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO,
SUBSCRIBE.
Supported: replaces, norefersub, extended-refer, timer, outbound, path,
X-cisco-serviceuri.
User-Agent: Z 3.15.40006 rv2.8.20.
Allow-Events: presence, kpml, talk.
Content-Length: 0.
.
U 2017/11/02 07:50:54.248922 10.7.0.186:5062 -> 10.7.0.190:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.7.0.190:5060;rport=5060;branch=z9hG4bK5526436.
Record-Route:
<sip:194.213.29.33:5062;r2=on;lr;ftag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781>.
Record-Route:
<sip:10.7.0.186:5062;r2=on;lr;ftag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781>.
Contact: <sip:192.168.1.64:39808>.
To:
<sip:[email protected]:39808;rinstance=d74acdb581467154;transport=UDP>;tag=726ffa30.
From: sip:[email protected];tag=uloc-2-59fa1f9d-711-3-9968b2da-c2c36781.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Accept: application/sdp, application/sdp.
Accept-Language: en.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO,
SUBSCRIBE.
Supported: replaces, norefersub, extended-refer, timer, outbound, path,
X-cisco-serviceuri.
User-Agent: Z 3.15.40006 rv2.8.20.
Allow-Events: presence, kpml, talk.
Content-Length: 0.
.
```
Here is a ping attempt from a server replicated to (we should not be pinging
from this registrar)
```
U 2017/11/02 08:37:59.426608 10.6.0.189:5060 -> 10.7.0.186:5062
OPTIONS
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP
SIP/2.0.
Via: SIP/2.0/UDP 10.6.0.189:5060;branch=z9hG4bK8416926.
Route: <sip:10.7.0.186:5062;lr;received=sip:212.2.172.228:39808>.
From: sip:[email protected];tag=uloc-2-59fa1f9d-714-17-9968b2da-13812ff4.
To:
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Content-Length: 0.
.
U 2017/11/02 08:38:19.431937 10.6.0.189:5060 -> 10.7.0.186:5062
OPTIONS
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP
SIP/2.0.
Via: SIP/2.0/UDP 10.6.0.189:5060;branch=z9hG4bK8345318.
Route: <sip:10.7.0.186:5062;lr;received=sip:212.2.172.228:39808>.
From: sip:[email protected];tag=uloc-2-59fa1f9d-714-17-9968b2da-23812ff4.
To:
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Content-Length: 0.
.
```
Here is a ping attempt from the last server replicated to (we should not be
pinging from this registrar)
```
U 2017/11/02 08:53:06.927374 10.6.0.191:5060 -> 10.7.0.186:5062
OPTIONS
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP
SIP/2.0.
Via: SIP/2.0/UDP 10.6.0.191:5060;branch=z9hG4bK8539212.
Route: <sip:10.7.0.186:5062;lr;received=sip:212.2.172.228:39808>.
From: sip:[email protected];tag=uloc-2-59fa1f9d-714-17-9968b2da-a25dfc84.
To:
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Content-Length: 0.
.
U 2017/11/02 08:53:26.931991 10.6.0.191:5060 -> 10.7.0.186:5062
OPTIONS
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP
SIP/2.0.
Via: SIP/2.0/UDP 10.6.0.191:5060;branch=z9hG4bK7581592.
Route: <sip:10.7.0.186:5062;lr;received=sip:212.2.172.228:39808>.
From: sip:[email protected];tag=uloc-2-59fa1f9d-714-17-9968b2da-b25dfc84.
To:
sip:[email protected]:39808;rinstance=ed8aa63e90f53e97;transport=UDP.
Call-ID: [email protected].
CSeq: 1 OPTIONS.
Content-Length: 0.
.
```
### Possible Solutions
Unknown
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
version: kamailio 5.0.4 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC,
F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled on 10:57:22 Oct 26 2017 with gcc 4.8.5
```
* **Operating System**:
```
CentOS Linux release 7.4.1708 (Core)
Linux localhost 3.10.0-693.5.2.el7.x86_64 #1 SMP Fri Oct 20 20:32:50 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux
```
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