[Pkg-nagios-devel] Bug#895558: monitoring-plugins-basic: check_ping cannot be used with puny-code domains

[Uwe Kleine-König]

Package: monitoring-plugins-basic
Version: 2.2-3
Severity: normal

Hello,

I want to monitor a host called www.xn--kleine-knig-yfb.de (or
www.kleine-könig.de). Both ways to write this hostname are incompatible with
check_ping:

	$ /usr/lib/nagios/plugins/check_ping -H www.xn--kleine-knig-yfb.de -w 5,5% -c 10,10% -vvv
	CMD: /bin/ping6 -n -U -w 10 -c 5 www.xn--kleine-knig-yfb.de
	Got stderr: ping: www.xn--kleine-knig-yfb.de: Parameter string not correctly encoded
	/bin/ping6 -n -U -w 10 -c 5 www.xn--kleine-knig-yfb.de
	CRITICAL - Could not interpret output from ping command

	$ /usr/lib/nagios/plugins/check_ping -H www.kleine-könig.de -w 5,5% -c 10,10% -vvv
	check_ping: Invalid hostname/address - www.kleine-könig.de
	Usage:
	check_ping -H <host_address> -w <wrta>,<wpl>% -c <crta>,<cpl>%
	 [-p packets] [-t timeout] [-4|-6]

"funny" enough, ping6 supports both variants:

	$ /bin/ping6 -n -U -w 10 -c 5 www.xn--kleine-knig-yfb.de
	PING www.xn--kleine-knig-yfb.de(2a01:4f8:c0c:3a97::2) 56 data bytes
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=1 ttl=64 time=0.092 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=2 ttl=64 time=0.039 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=3 ttl=64 time=0.068 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=4 ttl=64 time=0.046 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=5 ttl=64 time=0.061 ms

	--- www.xn--kleine-knig-yfb.de ping statistics ---
	5 packets transmitted, 5 received, 0% packet loss, time 4092ms
	rtt min/avg/max/mdev = 0.039/0.061/0.092/0.019 ms

	$ /bin/ping6 -n -U -w 10 -c 5 www.kleine-könig.de
	PING www.kleine-könig.de(2a01:4f8:c0c:3a97::2) 56 data bytes
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=1 ttl=64 time=0.031 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=2 ttl=64 time=0.059 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=3 ttl=64 time=0.053 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=4 ttl=64 time=0.058 ms
	64 bytes from 2a01:4f8:c0c:3a97::2: icmp_seq=5 ttl=64 time=0.047 ms

	--- www.kleine-könig.de ping statistics ---
	5 packets transmitted, 5 received, 0% packet loss, time 4079ms
	rtt min/avg/max/mdev = 0.031/0.049/0.059/0.012 ms

Best regards
Uwe

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (700, 'testing'), (600, 'unstable'), (500, 'unstable-debug'), (500, 'stable'), (499, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.15.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages monitoring-plugins-basic depends on:
ii  iputils-ping               3:20161105-1
ii  libc6                      2.27-3
ii  libssl1.1                  1.1.0h-2
pn  monitoring-plugins-common  <none>
ii  procps                     2:3.3.12-4
ii  ucf                        3.0038

Versions of packages monitoring-plugins-basic recommends:
ii  libcap2-bin  1:2.25-1.2

Versions of packages monitoring-plugins-basic suggests:
pn  icinga | icinga2  <none>