[SR-Users] detect tcp connection close using tcpops module

[Henning Westerholt]

Hello,

did not looked into the code yet, but it might be just a bug/limitation of the module. You could open an issue on our github tracker about it.

Cheers,

Henning

--
Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com<https://gilawa.com/>

From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of sthustfo
Sent: Tuesday, October 11, 2022 4:50 AM
To: sr-users at lists.kamailio.org
Subject: Re: [SR-Users] detect tcp connection close using tcpops module

Any pointers on what I am missing would be highly appreciated. The event routes are being called but the $conid does not contain the proper value.

------- Original Message -------
On Sunday, October 9th, 2022 at 20:55, sthustfo <sthustfo at proton.me<mailto:sthustfo at proton.me>> wrote:


Looking at the source code, it seems the extra_data is not set. But that does not explain why $conid is <null> when tcp:closed event route is triggered.


------- Original Message -------
On Sunday, October 9th, 2022 at 19:55, sthustfo <sthustfo at proton.me<mailto:sthustfo at proton.me>> wrote:


I am running latest kamailio 5.6.2 and attempting to detect tcp/tls connection being disconnected or closed using tcpops module. As suggested in tcpops documentation at https://www.kamailio.org/docs/modules/devel/modules/tcpops.html, registered event routes as below.

event_route[tcp:closed] {

  xlog("L_INFO", "$proto connection closed ($conid)\n");

}



event_route[tcp:timeout] {

  xlog("L_INFO", "$proto connection timed out ($conid)\n");

}



event_route[tcp:reset] {

  xlog("L_INFO", "$proto connection reset by peer ($conid)\n");

}
Now it is observed that the event route is being called but the $conid is not set. The logs show the below log statements and extra data is (nil).

24(4263) DEBUG: <core> [core/tcp_read.c:284]: tcp_read_data(): EOF on connection 0x7ffff2ff8b90 (state: 0, flags: 4018) - FD 7, bytes 0, rd-flags 10000 ([10.8.137.33]:51069 -> [10.8.137.33]:5060)24(4263) DEBUG: <core> [core/tcp_read.c:1500]: tcp_read_req(): EOF
24(4263) DEBUG: <core> [core/io_wait.h:600]: io_watch_del(): DBG: io_watch_del (0x555555ab6960, 7, -1, 0x10) fd_no=2 called
24(4263) DEBUG: <core> [core/tcp_read.c:1870]: handle_io(): removing from list 0x7ffff2ff8b90 id 1 fd 7, state 2, flags 4018, main fd 51, refcnt 2 ([10.8.137.33]:51069 -> [10.8.137.33]:5060)
24(4263) DEBUG: <core> [core/tcp_read.c:1653]: release_tcpconn(): releasing con 0x7ffff2ff8b90, state -1, fd=7, id=1 ([10.8.137.33]:51069 -> [10.8.137.33]:5060)
24(4263) DEBUG: <core> [core/tcp_read.c:1657]: release_tcpconn(): extra_data (nil)
32(4271) DEBUG: <core> [core/tcp_main.c:3651]: handle_tcp_child(): reader response= 7ffff2ff8b90, -1 from 0
32(4271) DEBUG: <core> [core/tcp_main.c:3576]: tcp_emit_closed_event(): TCP closed event creation triggered (reason: 0)
32(4271) DEBUG: tcpops [tcpops.c:295]: tcpops_handle_tcp_closed(): received TCP closed event
32(4271) DEBUG: tcpops [tcpops.c:249]: tcpops_tcp_closed_run_route(): event reason id: 0 rt: 1
32(4271) DEBUG: <core> [core/parser/parse_fline.c:249]: parse_first_line(): first line type 1 (request) flags 1
32(4271) DEBUG: <core> [core/parser/msg_parser.c:679]: parse_msg(): SIP Request:
32(4271) DEBUG: <core> [core/parser/msg_parser.c:681]: parse_msg():  method:  <OPTIONS>
32(4271) DEBUG: <core> [core/parser/msg_parser.c:683]: parse_msg():  uri:     <sip:you at kamailio.org<mailto:sip:you at kamailio.org>>
32(4271) DEBUG: <core> [core/parser/msg_parser.c:685]: parse_msg():  version: <SIP/2.0>
32(4271) DEBUG: <core> [core/parser/parse_hname2.c:301]: parse_sip_header_name(): parsed header name [Via] type 1
32(4271) DEBUG: <core> [core/parser/parse_via.c:2639]: parse_via(): end of header reached, state=2
32(4271) DEBUG: <core> [core/parser/msg_parser.c:555]: parse_headers(): Via found, flags=2
32(4271) DEBUG: <core> [core/parser/msg_parser.c:557]: parse_headers(): this is the first via
32(4271) exec: *** cfgtrace:dbg_cfg_trace(): unknown_route=[tcp:closed] c=[/usr/local/etc/kamailio/kamailio.cfg] l=976 a=26 n=xlog
32(4271) INFO: <script> tcp connection closed (<null>)

Can anyone provide any pointers on what I am missing?

Thanks in advance.


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