snmp_exporter does not parse InetAddressIPv4z correctly

[Nachtfalkeaw]

Host operating system: output of uname -a

Linux hostname 4.18.0-513.11.1.el8_9.x86_64 #1 SMP Thu Dec 7 03:06:13 EST 2023 x86_64 x86_64 x86_64 GNU/Linux
RHEL8

snmp_exporter version: output of snmp_exporter -version

snmp_exporter, version 0.25.0 (branch: HEAD, revision: 9c42d6c874d479314e612bca69558c81f8e26287)
  build user:       root@880115266f70
  build date:       20231210-10:05:18
  go version:       go1.21.5
  platform:         linux/amd64
  tags:             netgo

What device/snmpwalk OID are you using?

# HELP ltmNodeAddrAddr The IP address of a node - 1.3.6.1.4.1.3375.2.2.4.1.2.1.2
# TYPE ltmNodeAddrAddr gauge
# HELP ltmNodeAddrAddrType The IP address type of ltmNodeAddrAddr. - 1.3.6.1.4.1.3375.2.2.4.1.2.1.1
# TYPE ltmNodeAddrAddrType gauge

If this is a new device, please link to the MIB(s).

https://www.circitor.fr/Mibs/Html/F/F5-BIGIP-LOCAL-MIB.php

What did you do that produced an error?

I try to get IP-Addresses via snmp from an F5 BigIP LTM Loadbalancer. The different Nondes, members, Pools have IP-addresses and some of the have a trailing %0 or %1 or %2 which indicates the local separation on the system.
e.g.

10.10.10.10 # in the /Common/ partition without any suffix.
10.10.10.10%1 # in another partition which is not /Common/

What did you expect to see?

no hex as IP but real IP with suffix

What did you see instead?

# HELP ltmNodeAddrAddr The IP address of a node - 1.3.6.1.4.1.3375.2.2.4.1.2.1.2
# TYPE ltmNodeAddrAddr gauge
ltmNodeAddrAddr{ltmNodeAddrAddr="0x0101010100000001",ltmNodeAddrName="/gn-pr-pre-live-2134/linux001.sub.domain.de"} 1
ltmNodeAddrAddr{ltmNodeAddrAddr="0x0101010100000002",ltmNodeAddrName="/gn-pr-pre-live-2135/linux001.sub.domain.de"} 1
ltmNodeAddrAddr{ltmNodeAddrAddr="0x0202020200000001",ltmNodeAddrName="/gn-pr-pre-live-2134/linux002.sub.domain.de"} 1
ltmNodeAddrAddr{ltmNodeAddrAddr="0x0202020200000002",ltmNodeAddrName="/gn-pr-pre-live-2135/linux002.sub.domain.de"} 1
ltmNodeAddrAddr{ltmNodeAddrAddr="1.1.1.1",ltmNodeAddrName="/Common/linux001.sub.domain.de"} 1
ltmNodeAddrAddr{ltmNodeAddrAddr="2.2.2.2",ltmNodeAddrName="/Common/linux002.sub.domain.de"} 1
# HELP ltmNodeAddrAddrType The IP address type of ltmNodeAddrAddr. - 1.3.6.1.4.1.3375.2.2.4.1.2.1.1
# TYPE ltmNodeAddrAddrType gauge
ltmNodeAddrAddrType{ltmNodeAddrName="/Common/linux001.sub.domain.de"} 1
ltmNodeAddrAddrType{ltmNodeAddrName="/Common/linux002.sub.domain.de"} 1
ltmNodeAddrAddrType{ltmNodeAddrName="/gn-pr-pre-live-2134/linux001.sub.domain.de"} 3
ltmNodeAddrAddrType{ltmNodeAddrName="/gn-pr-pre-live-2134/linux002.sub.domain.de"} 3
ltmNodeAddrAddrType{ltmNodeAddrName="/gn-pr-pre-live-2135/linux001.sub.domain.de"} 3
ltmNodeAddrAddrType{ltmNodeAddrName="/gn-pr-pre-live-2135/linux002.sub.domain.de"} 3

Discussion on google groups:
https://groups.google.com/g/prometheus-users/c/391-yR4qdgk