17 Jul
2019
17 Jul
'19
12:23 a.m.
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### Description
When using the PATH header option to keep track of original Kamailio node that received
the REGISTER, if nathelper is also used with SIP ping enabled, the SIP OPTIONS is sent to
itself following the PATH header and not sent directly to the destination.
The nathelper/user location modules should have a flag similar to the
"path_check_local" of the registrar module, which is meant to avoid looping the
message to itself in case the next hop pointed by the PATH header is "myself".
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Explain what you did, what you expected to happen, and what actually happened.
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### Troubleshooting
#### Reproduction
Configure the registrar module to support PATH and before saving the contact info add the
PATH header with the local Kamailio information. Also make sure to have the nathelper and
usrloc modules configured to send the keepalive SIP OPTIONS to the registered extensions.
By the time the SIP OPTIONS is sent, Kamailio sends to itself, then the message has to be
loose_route'd to the final destination.
This could be avoided by having the nathelper module to identify the next hop is Kamailio
itself skipping this destination as a call to "lookup()" does for the registrar
module when the flag path_check_local is true.
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-->
#### SIP Traffic
<!--
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in a pcap file, then add them next, or attach to issue, or provide a link to download them
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172.128.128.10 is the Kamailio IP and 172.128.128.20 is the extension IP
```
11:51:07.224713 IP (tos 0x60, ttl 64, id 64497, offset 0, flags [none], proto UDP (17),
length 518)
172.128.128.10.5060 > 172.128.128.10.5060: SIP, length: 490
OPTIONS sip:345671002@172.128.128.20:5060;rinstance=d1eb3444a5cec5a1;transport=UDP
SIP/2.0
Via: SIP/2.0/UDP 172.128.128.10:5060;branch=z9hG4bK2540713
Route:
<sip:172.128.128.10:5060;received=sip:172.128.128.20:5060;lr;cluster_node=192.168.156.10:5060>
From: sip:sbc@mydomain.com;tag=uloc-5d2e6499-2fb5-1-0-c15309d2
To: sip:345671002@172.128.128.20:5060;rinstance=d1eb3444a5cec5a1;transport=UDP
Call-ID: 40ee1573-7506bba3-5e30c05(a)172.128.128.10
CSeq: 1 OPTIONS
Content-Length: 0
11:51:07.226132 IP (tos 0x60, ttl 64, id 44359, offset 0, flags [none], proto UDP (17),
length 502)
172.128.128.10.5060 > 172.128.128.20.5060: SIP, length: 474
OPTIONS sip:345671002@172.128.128.20:5060;rinstance=d1eb3444a5cec5a1;transport=UDP
SIP/2.0
Via: SIP/2.0/UDP 172.128.128.10;branch=z9hG4bKb958.b807e80b742db62504a45220d8f0e974.0
Via: SIP/2.0/UDP 172.128.128.10:5060;branch=z9hG4bK2540713
From: sip:sbc@mydomain.com;tag=uloc-5d2e6499-2fb5-1-0-c15309d2
To: sip:345671002@172.128.128.20:5060;rinstance=d1eb3444a5cec5a1;transport=UDP
Call-ID: 40ee1573-7506bba3-5e30c05(a)172.128.128.10
CSeq: 1 OPTIONS
Content-Length: 0
11:51:07.303474 IP (tos 0x0, ttl 128, id 10816, offset 0, flags [none], proto UDP (17),
length 786)
172.128.128.20.5060 > 172.128.128.10.5060: SIP, length: 758
SIP/2.0 200 OK
Via: SIP/2.0/UDP 172.128.128.10;branch=z9hG4bKb958.b807e80b742db62504a45220d8f0e974.0
Via: SIP/2.0/UDP 172.128.128.10:5060;branch=z9hG4bK2540713
Contact: <sip:172.128.128.20:5060>
To:
<sip:345671002@172.128.128.20:5060;rinstance=d1eb3444a5cec5a1;transport=UDP>;tag=bb0c1f2d
From: sip:sbc@mydomain.com;tag=uloc-5d2e6499-2fb5-1-0-c15309d2
Call-ID: 40ee1573-7506bba3-5e30c05(a)172.128.128.10
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
11:51:07.306821 IP (tos 0x60, ttl 64, id 64570, offset 0, flags [none], proto UDP (17),
length 727)
172.128.128.10.5060 > 172.128.128.10.5060: SIP, length: 699
SIP/2.0 200 OK
Via: SIP/2.0/UDP 172.128.128.10:5060;branch=z9hG4bK2540713
Contact: <sip:172.128.128.20:5060;alias=172.128.128.20~5060~1>
To:
<sip:345671002@172.128.128.20:5060;rinstance=d1eb3444a5cec5a1;transport=UDP>;tag=bb0c1f2d
From: sip:sbc@mydomain.com;tag=uloc-5d2e6499-2fb5-1-0-c15309d2
Call-ID: 40ee1573-7506bba3-5e30c05(a)172.128.128.10
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
```
### Possible Solutions
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If you found a solution or workaround for the issue, describe it. Ideally, provide a pull
request with a fix.
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Not found.
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
# kamailio -v
version: kamailio 5.2.2 (x86_64/linux) 67f967
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_URI_SIZE 1024, BUF_SIZE 65535,
DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 67f967
compiled on 11:40:41 Mar 11 2019 with gcc 4.8.5
```
* **Operating System**:
<!--
Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04,
CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
Kernel details (output of `uname -a`)
-->
```
# uname -a
Linux kamailio-1 3.10.0-514.21.2.el7.x86_64 #1 SMP Tue Jun 20 12:24:47 UTC 2017 x86_64
x86_64 x86_64 GNU/Linux
```
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19 Jul
19 Jul
5:29 a.m.
Thank you for the report. Just to clarify - the current routing works, but is of course
not optimal because of the local loop? So basically you are suggesting to add a
path_check_local functionality also to the nathelper module.
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21 Jul
21 Jul
8:24 p.m.
Yes. As long as the script actually expects OPTIONS to an external domain, calling a
loose_route() will route it properly.
I usually do not allow OPTIONS passing through my Kamailio to external users but had to
add this exception for this case, reason why I think a flag can be added to avoid this
local loop and the extra logic in the script.
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8 Nov
8 Nov
3:20 a.m.
This issue is stale because it has been open 6 weeks with no activity. Remove stale label
or comment or this will be closed in 2 weeks.
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16 Nov
16 Nov
12:05 a.m.
This change is a very nice to have and shouldn't be closed.
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2:08 a.m.
If an item on tracker is wanted to stay open, the `Stale` label has to be removed.
On the other hand, this is a free collaboration project. If nobody has time or financial
resources to support the development of the new features, then it does not seem worth
enough. This particular request is more than 4 years old.
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29 Dec
29 Dec
9:38 p.m.
This issue is stale because it has been open 6 weeks with no activity. Remove stale label
or comment or this will be closed in 2 weeks.
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12 Jan
12 Jan
9:41 p.m.
Closed #2011 as not planned.
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353
days inactive
1994
days old
7 comments
4 participants
participants (4)
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Daniel-Constantin Mierla -
github-actions[bot]
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Henning Westerholt
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pwakano