9 Feb
2024
9 Feb
'24
9:48 p.m.
### Description
After installing kamailio on Ubuntu (20.04 and 22.04) using normal kamailio.org
instructions, things work fine. However, a developer is working on a large project as
root, and occasionally restarts kamailio with the command "kamctl
<start|stop|restart>", rather than the OS command "systemctl
<stop|start|restart> kamailio". After that, any attempt to restart or check
status using systmectl fails, and rebooting the server occasionally fails to restart
kamailio.
### Troubleshooting
#### Reproduction
Install ubuntu 22.04 or 20.04. When up and running, try this:
`systemctl status kamailio` (everything looks good)
`ps -C kamailio -o comm,uid,euid,pid,ppid` (all happy, Kamailio running as user kamailio)
`kamctl restart`
`ps -C kamailio -o comm,uid,euid,pid,ppid` (Yes it's running, but as root, not
kamailio)
`systemctl status kamailio` (FAILS, 20.04 reports "Failed to start", 22.04
reports "kamailio.service: Deactivated successfully")
`systemctl restart kamailio` (FAILS - same reports as preceding "status"
command)
#### Debugging Data
<!--
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local variables and the list of the code at the issue location.
gdb /path/to/kamailio /path/to/corefile
bt full
info locals
list
If you are familiar with gdb, feel free to attach more of what you consider to
be relevant.
-->
#### Log Messages
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Check the syslog file and if there are relevant log messages printed by Kamailio, add them
next, or attach to issue, or provide a link to download them (e.g., to a pastebin site).
-->
After command systemctl restart kamailio:
```
Feb 9 18:30:02 usdc2-lab-drproxy02 kamailio: INFO: <core> [core/sctp_core.c:74]:
sctp_core_check_support(): SCTP API not enabled - if you want to use it, load sctp module
Feb 9 18:30:02 usdc2-lab-drproxy02 kamailio: INFO: <core> [core/tcp_main.c:5042]:
init_tcp(): using epoll_lt as the io watch method (auto detected)
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: rr
[../outbound/api.h:52]: ob_load_api(): unable to import bind_ob - maybe module is not
loaded
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: rr [rr_mod.c:177]:
mod_init(): outbound module not available
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: auth [auth_mod.c:345]:
mod_init(): qop set, but nonce-count (nc_enabled) support disabled
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: <core>
[main.c:2779]: main(): processes (at least): 32 - shm size: 67108864 - pkg size: 8388608
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: <core>
[core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: <core>
[core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: <core>
[core/udp_server.c:154]: probe_max_receive_buffer(): SO_RCVBUF is initially 212992
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: <core>
[core/udp_server.c:206]: probe_max_receive_buffer(): SO_RCVBUF is finally 425984
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: ERROR: <core>
[core/tcp_main.c:3162]: tcp_init(): bind(c, 0x7f49b0475c74, 16) on 127.0.0.1:5060 :
Address already in use
Feb 9 18:30:02 usdc2-lab-drproxy02 /usr/sbin/kamailio[2388]: INFO: <core>
[core/sctp_core.c:53]: sctp_core_destroy(): SCTP API not initialized
```
#### SIP Traffic
<!--
If the issue is exposed by processing specific SIP messages, grab them with ngrep or save
in a pcap file, then add them next, or attach to issue, or provide a link to download them
(e.g., to a pastebin site).
-->
```
(paste your sip traffic here)
```
### Possible Solutions
Modify kamctl et. al. to call systemctl for start, stop, restart commands. Alternatively
have kamctl call setuid() before start, restart, stop commands.
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
On ubuntu 20.04:
```
version: kamailio 5.3.2 (x86_64/linux)
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_BLACKLIST, 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: unknown
compiled with gcc 9.2.1
```
For ubuntu 22.04:
```
version: kamailio 5.6.5 (x86_64/linux)
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: unknown
compiled with gcc 11.4.0
```
* **Operating System**:
For ubuntu 22.04:
```
root@my_22.04_ubuntu:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy
root@my_22.04_ubuntu:~# uname -a
Linux my_22.04_ubuntu 5.15.0-94-generic #104-Ubuntu SMP Tue Jan 9 15:25:40 UTC 2024 x86_64
x86_64 x86_64 GNU/Linux
root@my_22.04_ubuntu:~#
```
For ubuntu 20.04
```
root@my_20.04_ubuntu:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal
root@my_20.04_ubuntu:~# uname -a
Linux my_20.04_ubuntu 5.4.0-171-generic #189-Ubuntu SMP Fri Jan 5 14:23:02 UTC 2024 x86_64
x86_64 x86_64 GNU/Linux
root@my_20.04_ubuntu:~#
```
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