3 Apr
2020
3 Apr
'20
8:43 p.m.
Somehow I thought that the keepalive is not working and you look for
fixing it. Now I read the full thread and actually the routing of
requests within dialog doesn't work.
Can you send a pcap with such a call taken on Kamailio system? ACK and
BYE should be routed based on Contact of INVITE/200ok and record-route
headers, no longer related to REGISTER (only initial INVITE should rely
on registration data).
Cheers,
Daniel
On 02.04.20 22:11, Daniel W. Graham wrote:
Same behavior with add_contact_alias()
-dan
*From: *"miconda(a)gmail.com" <miconda(a)gmail.com>
*Reply-To: *"miconda(a)gmail.com" <miconda(a)gmail.com>
*Date: *Thursday, April 2, 2020 at 2:59 PM
*To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org>rg>, Daniel Graham <dan(a)cmsinter.net>
*Subject: *Re: [SR-Users] nathelper without usrloc
Hello,
can you try with add_contact_alias() instead of set_contact_alias()?
The second one updates the contact URI in a way that is visible for
the couple of local modules immediately, typically needed when having
dialog/presence module in that instance (still no changes to the
header itself, it uses some internal mechanism to signal contact value
should be taken from a special field). The first one uses the lumps
system that makes the changes over the contact URI not visible
immediately (unless msg_apply_changes() is used).
Maybe nat_keepalive() needs the original contact URI, not the one
updated by set_contact_alias().
Cheers,
Daniel
On 02.04.20 18:45, Daniel W. Graham wrote:
I was able to fix all issues, but have one partially lingering.
For register only, if I apply: set_contact_alias() with
nat_keepalive(), keepalives are not sent. Removing
set_contact_alias() fixes this.
I *shouldn’t need this if the pbx was saving received and rport
params as a result of add_path_received().
Can anyone explain why these two functions conflict?
Test scenario -
# Doesn’t result in register keepalive –
route[NATDETECT] {
force_rport();
set_contact_alias(); # removal of this enables keepalive
nat_keepalive();
return;
}
I’ve tested this with and without calls to handle_ruri_alias()
elsewhere in cfg script with same result.
-dan
*From: *sr-users <sr-users-bounces(a)lists.kamailio.org>
<mailto:sr-users-bounces@lists.kamailio.org> on behalf of Sergiu
Pojoga <pojogas(a)gmail.com> <mailto:pojogas@gmail.com>
*Reply-To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org> <mailto:sr-users@lists.kamailio.org>
*Date: *Wednesday, April 1, 2020 at 8:58 AM
*To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org> <mailto:sr-users@lists.kamailio.org>
*Subject: *Re: [SR-Users] nathelper without usrloc
Nothing else comes to mind based on info provided. May be you can
send some sip traffic captures and elaborate?
Regards,
--Sergiu
On Tue, Mar 31, 2020 at 10:29 PM Daniel W. Graham
<dan(a)cmsinter.net <mailto:dan@cmsinter.net>> wrote:
Thanks, yeah I had already changed that, but registration
works with either. I’m not asking for a solution, just looking
for suggestions on anything that needs attention, so I
appreciate your pointers.
-dan
On Mar 31, 2020, at 8:55 PM, Sergiu Pojoga <pojogas(a)gmail.com
<mailto:pojogas@gmail.com>> wrote:
Oh and almost forgot - try *add_path_received()* instead
of add_path()
Good luck!
On Tue, Mar 31, 2020 at 8:48 PM Sergiu Pojoga
<pojogas(a)gmail.com <mailto:pojogas@gmail.com>> wrote:
A lot of things may not be 'right' here, unfortunately
your question is too broad to answer and too little
info, the topology is indeed non-default and I doubt
someone will present you with a final solution
(there's business support, if you're looking for that).
Otherwise, if I were to just throw a guess:
- try fix_nated_register() (instead of
set_contact_alias) just for Register method on the way
to the registrar
- in the Registrar, make sure the Contact's Path
address is correct
Cheers,
--Sergiu
On Tue, Mar 31, 2020 at 7:34 PM Daniel W. Graham
<dan(a)cmsinter.net <mailto:dan@cmsinter.net>> wrote:
It did help, I read that a couple times already
but something is still not right, and its only
because of the decoupling of the registrar. I need
to do more debugging and see if Im loosing the
flag value. Hoping something sticks out that
someone sees and can point me in the right direction.
-dan
On Mar 31, 2020, at 7:15 PM, Alex Balashov
<abalashov(a)evaristesys.com
<mailto:abalashov@evaristesys.com>> wrote:
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
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--
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www.twitter.com/miconda <http://www.twitter.com/miconda> --
www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
--
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Daniel,
Might this article be of aid?
http://www.evaristesys.com/blog/server-side-nat-traversal-with-kamailio-the…
-- Alex
> On Tue, Mar 31, 2020 at 11:12:23PM +0000,
Daniel W. Graham
wrote:
>
> It does but doesn't work as well as kamailio,
and
since the proxy is the entry point.
>
> The biggest issue here isnt the keepalive, as I
did have
that working. The main issue is the
routing of messages, utilizing set_contact_alias
and handle_ruri_alias, as Ive been unable to get
ack and bye messages to make it past the proxy.
I’m assuming these functions are not being used at
the right locations or I need to rely on another
mechanism to accomplish it. I also question my use
of the PBX flag and the natmanage logic.
>
> -dan
>
> On Mar 31, 2020, at 7:01 PM, Sergiu Pojoga
<pojogas(a)gmail.com <mailto:pojogas@gmail.com>> wrote:
>
>
> Hi Daniel,
>
> From what you are describing, my understanding
is that the
Registrar is the PBX, kamailio is
acting as an edge proxy. If so, doesn't the
PBX/registrar have NAT traversal/keepalive
mechanisms of its own?
>
> Regards,
> --Sergiu
>
> On Tue, Mar 31, 2020 at 1:55 PM Daniel W.
Graham
<dan(a)cmsinter.net
<mailto:dan@cmsinter.net><mailto:dan@cmsinter.net
<mailto:dan@cmsinter.net>>> wrote:
> I’ve been missing with this for a while and
seem to be missing something. Any suggestions on
what is missing here?
>
> Trying to use set_contact_alias() and
handle_ruri_alias()
from nathelper module and
nat_keepalive from nat_traversal module, without
registrar.
>
> I had register keepalive working, that has
since broke.
When register keepalive was working,
I was able to place call in either direction but
ACK and BYE was not being routed past kamailio.
>
> Registrations are forwarded to the PBX using
add_path()
and is working.
>
> Also not included below is the routing to the
PBX, that is
just setting $du and t_relay, and is
also working.
>
> Topology is: UA1 -> NAT -> kamailio -> PBX -> UA2
>
> Using default config file as the example,
modified with
above changes. I also removed RTP
config as that is a non-issue.
>
> request_route {
> ……
> # FLAG MESSAGES FROM PBX
> setflag(FLT_PBX);
> route(NATDETECT);
> ……
>
> route[NATDETECT] {
> if (nat_uac_test("19")) {
> force_rport();
> set_contact_alias();
> nat_keepalive();
> }
> return;
> }
>
> route[WITHINDLG] {
> if (!has_totag()) return;
> if (loose_route()) {
> route(DLGURI);
> } else if (
is_method("ACK") ) {
>
route(NATMANAGE);
> } else if (
is_method("NOTIFY") ) {
>
record_route();
> }
> route(RELAY);
> exit;
> }
>
> if (is_method("SUBSCRIBE") && uri ==
myself) {
> route(PRESENCE);
> exit;
> }
> if ( is_method("ACK") ) {
> if ( t_check_trans() ) {
> route(RELAY);
> exit;
> } else {
> exit;
> }
> }
> sl_send_reply("404","Not here");
> exit;
> }
>
> route[NATMANAGE] {
> if(isflagset(FLT_PBX)) {
> handle_ruri_alias();
> }
> if(!isflagset(FLT_PBX)) {
> set_contact_alias();
> } return;
> }
>
> route[DLGURI] {
> if(!isdsturiset()) {
> handle_ruri_alias();
> }
> return;
> }
>
> branch_route[MANAGE_BRANCH] {
> route(NATMANAGE);
> }
>
> onreply_route[MANAGE_REPLY] {
> if(status=~"[12][0-9][0-9]") {
> route(NATMANAGE);
> }
> }
> failure_route[MANAGE_FAILURE] {
> route(NATMANAGE);
>
> if (t_is_canceled()) exit;
>
>
> -dan
>
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--
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Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/,
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