Description

When setting listen with advertise in the configuration file the advertise section cannot contain an address that has the string dns within it. If at any point the domain used in advertise contains the three letters consecutively without being broken by a hypen or a dot it causes the parser to fail, see logging below.

I tried quoting the string but it didn't seam to parse properly. It interpenetrated the full thing as the listen address portion.

Troubleshooting

Reproduction

Add any advertise address to the config file with the string dns.
e.g.

listen=tcp:127.0.0.1:5060 advertise sip.dns.example.com:5060

Also using it in the advertised_address section without quotes causes the error.

advertised_address=sip.dns.example.com:5060

Log Messages

 0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 62, column 43-45: syntax error                              
 0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 62, column 43-45: invalid host or interface name            
 0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 62, column 43-45: ip address, interface name or hostname expected
 0(98) CRITICAL: <core> [core/cfg.y:3507]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 62, column 47-54:                                           
ERROR: bad config file (4 errors)
```

### Possible Solutions

A solution could be to use the a `advertised_address` though the cookbook states that this could be deprecated in future and that the `listen` config parameter is preferred.

### Additional Information

  * **Kamailio Version** - output of `kamailio -v`

```
version: kamailio 5.2.1 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, 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                                                  
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 6.3.0
```

* **Operating System**:



Running in Debian container image.
```
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
Linux 1498e1ef835d 4.20.6-arch1-1-ARCH #1 SMP PREEMPT Thu Jan 31 08:22:01 UTC 2019 x86_64 GNU/Linux
```

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