On Mon, Jan 7, 2019 at 9:06 AM Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

there seems to be something wrong in your config with loading the nathelper module, can you check if you have proper #!ifdef ... #!endif blocks?

Try to run it with debug=3 and see if you can spot more hints via the DEBUG messages printed in the logs...

Cheers,
Daniel

On 07.01.19 14:44, Andrew Chen wrote:
Hi Daniel,

Here is all of it:

Jan 3 18:33:01 sjomainkama55 systemd[1]: Stopped Kamailio (OpenSER) - the Open Source SIP Server.

Jan 3 18:33:01 sjomainkama55 systemd[1]: Starting Kamailio (OpenSER) - the Open Source SIP Server...

Jan 3 18:33:01 sjomainkama55 kamailio: ERROR: <core> [core/cfg.y:3309]: yyparse(): cfg. parser: failed to find command nat_uac_test (params 1)

Jan 3 18:33:01 sjomainkama55 kamailio: CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 1093, column 28: unknown command, missing loadmodule?

Jan 3 18:33:01 sjomainkama55 kamailio: ERROR: <core> [core/cfg.y:3309]: yyparse(): cfg. parser: failed to find command add_contact_alias (params 0)

Jan 3 18:33:01 sjomainkama55 kamailio: CRITICAL: <core> [core/cfg.y:3449]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 1098, column 35: unknown command, missing loadmodule?

Jan 3 18:33:01 sjomainkama55 kamailio[12334]: ERROR: bad config file (2 errors)

I just realized it missed the add_contact_alias as well. This is the config in the Websocket module page which I copy and pasted:
onreply_route[WS_REPLY] {
        if (nat_uac_test(64)) {
                # Do NAT traversal stuff for replies to a WebSocket connection
                # - even if it is not behind a NAT!
                # This won't be needed in the future if Kamailio and the
                # WebSocket client support Outbound and Path.
                add_contact_alias();
        }
}
On Mon, Jan 7, 2019 at 3:42 AM Daniel-Constantin Mierla <miconda@gmail.com> wrote:
Hello,

nat_uac_test(...) is allowed in the reply route block. The error is not about using the function in an invalid route block, but that the function is not found by name and 1 parameter.

Were there other error messages before the one you pasted in your message?

Cheers,
Daniel

On 04.01.19 01:28, Andrew Chen wrote:
Yup. The default configuaration already have the nathelper.so loaded. Plus, there are other places in the config where nat_uac_test was called but never error out.

On Thu, Jan 3, 2019 at 5:39 PM Sergey Okhapkin <sos@sokhapkin.dyndns.org> wrote:

Did you load the module?

On Thursday, January 3, 2019 5:27:12 PM EST Andrew Chen wrote:

Hey it's me again.

So I'm following the instructions in the Kamailio 5.1.x wiki module page for websocket configuration and it specifically mention to set this block:

onreply_route[WS_REPLY] {

xlog("L_INFO", "[CSeq $cs] Is in WS_REPLY.");

xlog("L_INFO", "[CSeq $cs] Sending $rs $rr to $sel(via[2].host) via $sel(via[2].transport) len: $ml");

xlog("L_INFO", "[CSeq $cs] \n$mb \n");

if(nat_uac_test("64")) {

# Do NAT traversal stuff for replies to a WebSocket connection

# - even if it is not behind a NAT!

# This won't be needed in the future if Kamailio and the

# WebSocket client support Outbound and Path.

add_contact_alias();

}

}

When I did this and started up Kamailio, it gave me an error:

Jan 3 22:19:43 sjomainkama55 kamailio: ERROR: <core> [core/cfg.y:3309]: yyparse(): cfg. parser: failed to find command nat_uac_test (params 1)

I moved that if statement to a route block and I was able to start it up.

The wiki page for nathelper module specify this function can be run in onreply_route as well:

5.5. nat_uac_test(flags)

Tries to guess if client's request originated behind a nat. The parameter determines what heuristics is used.

Meaning of the flags is as follows:

1 - The “Contact” header field is searched for occurrence of RFC1918 or RFC6598 addresses.

2 - the "received" test is used: address in the “Via” header is compared against source IP address of signaling

4 - The Top Most “Via” is searched for occurrence of RFC1918 or RFC6598 addresses

8 - The SDP is searched for occurrence of RFC1918 or RFC6598 addresses

16 - Test if the source port is different from the port in the “Via” header

32 - Test if the source IP address of signaling is a RFC1918 or RFC6598 address

64 - Test if the source connection of signaling is a WebSocket

128 - Test if the “Contact” header URI port differs from the source port of the request (Warning: this is might be legal or even intended combination in non NATted scenarios)

All flags can be bitwise combined, the test returns true if any of the tests identified a NAT.

This function can be used from REQUEST_ROUTE, ONREPLY_ROUTE, FAILURE_ROUTE, BRANCH_ROUTE.

is this some known bug in 5.1.x?

Thanks

--

Andy Chen

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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference - May 6-8, 2019 -- www.kamailioworld.com
Kamailio Advanced Training - Mar 4-6, 2019 in Berlin; Mar 25-27, 2019, in Washington, DC, USA -- www.asipto.com
--

Andy Chen

Sr. Telephony Lead Engineer

415 516 5535 (M)

achen@fuze.com

*Confidentiality Notice: The information contained in this e-mail and any
attachments may be confidential. If you are not an intended recipient, you
are hereby notified that any dissemination, distribution or copying of this
e-mail is strictly prohibited. If you have received this e-mail in error,
please notify the sender and permanently delete the e-mail and any
attachments immediately. You should not retain, copy or use this e-mail or
any attachment for any purpose, nor disclose all or any part of the
contents to any other person. Thank you.*
-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference - May 6-8, 2019 -- www.kamailioworld.com
Kamailio Advanced Training - Mar 4-6, 2019 in Berlin; Mar 25-27, 2019, in Washington, DC, USA -- www.asipto.com