monitoring-plugins/plugins/check_dns.c, branch v3.0.0-rc3Monitoring Plugins
https://www.monitoring-plugins.org/repositories/monitoring-plugins/atom?h=v3.0.0-rc32025-09-15T10:59:37ZRun clang-format again2025-09-15T10:59:37ZLorenz Kästle12514511+RincewindsHat@users.noreply.github.com2025-09-15T10:59:37Zurn:sha1:802e46f8ea36c344f112d7e1dd8d64d17a4cc939ignore CNAMEs in RDNS-mode #14602025-03-09T14:43:06ZLorenz Kästle12514511+RincewindsHat@users.noreply.github.com2025-03-09T14:43:06Zurn:sha1:16cb24807db5b1bd20e2b31a15bda7940f1145bd
Suppose your provider uses RFC 2317 (or RFC 4183 for that matter). The output of nslookup could look like the following:
2.120.22.172.in-addr.arpa canonical name = 2.0/26.120.22.172.in-addr.arpa.
2.0/26.120.22.172.in-addr.arpa name = rajesh.intern.prauscher.de.
Without this filter, check_dns would check the string against "2.0/26.120.22.172.in-addr.arpa., rajesh.intern.prauscher.de." which will fail for obvious reasons.
In forward DNS, this is achieved in line 165, as nslookup will print the address separate from the CNAME-resolving.
Original commit by Patrick Rauscher (prauscher@prauscher.de), adapted
here.
Remove redundant NULL checks and replace deprecated index function2025-03-09T11:41:13ZLorenz Kästle12514511+RincewindsHat@users.noreply.github.com2025-03-09T11:41:13Zurn:sha1:8b8ce8a6055664b8db2156093fd6afa9cfa1c42fcheck_dns: some comments, small improvements2025-03-09T11:11:02ZLorenz Kästle12514511+RincewindsHat@users.noreply.github.com2025-03-09T11:11:02Zurn:sha1:c0d9580dac9779c40434c9b63a0ef4ef82b2e8baRefactor check_dns2025-03-09T11:04:40ZLorenz Kästle12514511+RincewindsHat@users.noreply.github.com2025-03-08T12:05:57Zurn:sha1:65794e31374b3aa6e1f2c03d090b52e137df13e6clang-format2025-03-08T09:55:21ZLorenz Kästle12514511+RincewindsHat@users.noreply.github.com2025-03-08T09:55:21Zurn:sha1:230054f94d8b6f90076c3cc25c9c36e7b3747c74check_dns: update copyright2024-10-31T02:33:51ZRincewindsHat12514511+RincewindsHat@users.noreply.github.com2024-10-31T02:33:51Zurn:sha1:078e9b96adce9a9ae10535e496a743288eb8c9f2check_dns: Linter fixes2024-10-31T02:33:10ZRincewindsHat12514511+RincewindsHat@users.noreply.github.com2024-10-31T02:33:10Zurn:sha1:4f34506c81484673bf3623d1c3a8100dc1761e8ccheck_dns: do not export local variables2024-10-31T02:30:42ZRincewindsHat12514511+RincewindsHat@users.noreply.github.com2024-10-31T02:30:42Zurn:sha1:702dc596a4a6ed124751c55cbd5c62f96ae8a157check_dns: clang-format2024-10-31T02:29:32ZRincewindsHat12514511+RincewindsHat@users.noreply.github.com2024-10-31T02:29:32Zurn:sha1:499c0a07ae42ef48b3a1f25031fb933c3c59e327