[ nagiosplug-Patches-3515506 ] Add authoritative verification to check_dig

Patches item #3515506, was opened at 2012-04-06 07:50
Message generated for change (Tracker Item Submitted) made by bruce_p
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Category: Enhancement
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Bruce Pennypacker (bruce_p)
Assigned to: Nobody/Anonymous (nobody)
Summary: Add authoritative verification to check_dig

Initial Comment:
This patch adds the -e option to check_dig, which checks that the 'aa' flag is returned in the 'flags' stanza from dig.  This verifies that the responding name server is an authority for the for the domain being queried.

Patch against Plugin Version (-V output): check_dig v1.4.15 (nagios-plugins 1.4.15)
Plugin Name: check_dig
Example Plugin Commandline:
Tested on operating system: linux (RedHat 5.7)
Tested on architecture: x86, x86_64
Tested with compiler: gcc 4.1.2

Examples (demonstrates that ns-1.sourceforge.com is authoritative for sf.net):

[brucep@carbon:~/tmp] ./check_dig -H NS-1.SOURCEFORGE.COM -l sf.net -w 10 -c 20 -e
DNS OK - 0.012 seconds response time (sf.net.   3600 IN A 216.34.181.62)|time=0.012328s;10.000000;20.000000;0.000000
[brucep@carbon:~/tmp] echo $?
0
[brucep@carbon:~/tmp] ./check_dig -H 4.2.2.2 -l sf.net -w 10 -c 20 -e
DNS CRITICAL - 0.033 seconds response time (Non-authoritative answer when authoritative answer required.)|time=0.032638s;10.000000;20.000000;0.000000
[brucep@carbon:~/tmp] echo $?
2
[brucep@carbon:~/tmp] ./check_dig -H 4.2.2.2 -l sf.net -w 10 -c 20 
DNS OK - 0.010 seconds response time (sf.net.   3576 IN A 216.34.181.62)|time=0.010212s;10.000000;20.000000;0.000000
[brucep@carbon:~/tmp] echo $?
0

Note: Last test does not use -e to ensure an otherwise valid response from dig.

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