6 Mar
2023
6 Mar
'23
8:42 a.m.
### Description
I have faced with an issue in Kamailio 5.6 when tcp closed reset by peer on remote side
but Kamailio dont executing route block "event_route[websocket:closed]".
### Kamailio minimal config file
####### Global Parameters #########
listen=udp:192.168.31.81:5060
listen=tcp:192.168.31.81:5060
listen=tcp:192.168.31.81:7000
tcp_accept_no_cl=yes
######## Kamailio control connector module ########
loadmodule "tm.so"
loadmodule "ctl.so"
modparam("ctl", "binrpc_buffer_size", 4096)
loadmodule "pv.so"
loadmodule "sl.so"
loadmodule "xlog.so"
loadmodule "nathelper.so"
loadmodule "xhttp.so"
loadmodule "websocket.so"
loadmodule "ipops.so"
loadmodule "siputils.so"
loadmodule "rr.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
request_route {
if(method=="REGISTER"){
save("location");
exit;
}
}
event_route[xhttp:request] {
set_reply_close();
set_reply_no_connect();
xlog("L_WARN", "websocket|log|connection from $si
received!\n");
if ($hdr(Upgrade)=~"websocket"
&& $hdr(Connection)=~"Upgrade"
&& $rm=~"GET") {
if (ws_handle_handshake())
{
exit;
}
}
xhttp_reply("404", "Not found", "", "");
}
event_route[websocket:closed]
{
xlog("L_WARN", "websocket|log|connection from $si closed!\n");
}
#### Reproduction
###Kamailio started and client sipml5 connected
[root@centos8 kamailio]# sh /root/run_kamailio.sh
Listening on
udp: 192.168.31.81:5060
tcp: 192.168.31.81:5060
tcp: 192.168.31.81:7000
Aliases:
tcp: centos8.local.tst:7000
tcp: centos8.local.tst:5060
udp: centos8.local.tst:5060
15(29286) WARNING: <script>: websocket|log|connection from 192.168.31.100 received!
### closing tcp connection by remote side
C:\Users\Alex>netstat -ano | findstr :7000
TCP 192.168.31.100:51688 192.168.31.81:7000 ESTABLISHED 9624
C:\Users\Alex>taskkill /pid 9624 /F
SUCCESS: The process with PID 9624 has been terminated.
### issue reproduced
17(29288) ERROR: <core> [core/tcp_read.c:272]: tcp_read_data(): error reading:
Connection reset by peer (104) ([192.168.31.100]:51688 ->17(29288) ERROR: <core>
[core/tcp_read.c:274]: tcp_read_data(): -> [192.168.31.81]:7000)
17(29288) ERROR: <core> [core/tcp_read.c:1478]: tcp_read_req(): ERROR: tcp_read_req:
error reading - c: 0x7f47d5134ad0 r: 0x7f47d5134bf8 (-1)
And nothing else but I am expecting something like that:
this is output from Kamailio 5.5 where the issue not reproduced.
13(39207) WARNING: websocket [ws_frame.c:227]: encode_and_send_ws_frame(): TCP/TLS
connection get failed
13(39207) ERROR: websocket [ws_frame.c:761]: ping_pong(): sending keepalive
14(39208) WARNING: <script>: websocket|log|connection from 192.168.31.100 closed!
Also additional output ws.dump
[root@centos8 kamailio]# kamcmd ws.dump
{
connections: {
}
info: {
wscounter: 0
truncated: no
}
}
### Possible Solutions
I found a commit which called this behavior
https://github.com/kamailio/kamailio/commit/3033b7681b4240fd64c9f1ff446b529…
If I was built Kamailo without this commit, the issue not reproduced, also the issue not
reproduced in Kamailio 5.5 or older.
### Additional Information
```
[root@centos8 kamailio-5.6]# kamailio -v
version: kamailio 5.6.4 (x86_64/linux) a004cf
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, 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_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
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: a004cf
compiled on 11:09:28 Mar 6 2023 with gcc 8.5.0
```
* **Operating System**:
```
[root@centos8 kamailio-5.6]# cat /etc/centos-release
CentOS Stream release 8
```
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