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1#!/usr/bin/perl -w
2
3# $Id: check_wins.pl 940 2004-11-25 04:46:16Z stanleyhopcroft $
4
5# Revision 1.3 2004/11/25 04:46:16 stanleyhopcroft
6# Non functional tidy ups to check_wins
7#
8# Revision 1.2 2003/08/20 08:31:49 tonvoon
9# Changed netsaint to nagios in use lib
10#
11# Revision 1.1 2003/02/09 14:16:28 sghosh
12# more contribs
13#
14
15use strict ;
16
17use Getopt::Long ;
18use vars qw($opt_H $opt_D $opt_W $opt_T $debug @my_dcs);
19
20use lib '/usr/local/nagios/libexec/' ;
21use utils qw($TIMEOUT %ERRORS &print_revision &support &usage);
22
23my $PROGNAME = 'check_wins' ;
24
25use constant SAMBA_DEBUG_LVL => 2 ;
26use constant MY_DCS => ('dc1','dc2') ;
27
28my $NMBLOOKUP_PATH = '/usr/bin/nmblookup' ;
29my $NMBLOOKUP = sub { return `$NMBLOOKUP_PATH $_[2] -R -U $_[0] $_[1]` } ;
30my $NMBLOOKUP_CMD = $NMBLOOKUP_PATH . ' -R -U' ;
31
32sub print_help ();
33sub print_usage ();
34sub help ();
35sub version ();
36
37delete @ENV{'PATH', 'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
38
39$SIG{"ALRM"} = sub { die "Alarm clock restart" } ;
40
41Getopt::Long::Configure('bundling', 'no_ignore_case');
42GetOptions
43 ("V|version" => \&version,
44 "h|help" => \&help,
45 "d|debug" => \$debug,
46 "C|controllers:s" => \@my_dcs,
47 "T|timeout:i" => \$opt_T,
48 "W|wins=s" => \$opt_W,
49 "D|domain=s" => \$opt_D);
50
51
52($opt_D) || usage("MS Domain name not specified\n");
53my $domain = $1 if $opt_D =~ m#(\w+)# ; # NetBIOS names allow __any__ characters (more than \w)
54($domain) || usage("Invalid MS D name: $opt_D\n");
55
56($opt_W) || usage("WINS hostname or address not specified\n");
57my $wins = $1 if $opt_W =~ m#((?:^\w+$)|(?:\d+(?:\.\d+){3,3}$))# ;
58($wins) || usage("Invalid WINS hostname or address: $opt_W\n");
59
60usage("You must provide the names of your domain controllers by updating MY_DCS in the text or use -C dc_name1 -C dc_name2 ..\n")
61 unless (@my_dcs or MY_DCS) ;
62
63@my_dcs = MY_DCS unless defined $my_dcs[0] ;
64$TIMEOUT = $opt_T if defined $opt_T ;
65
66my ($netbios_name, @dcs_of_domain, @dc_addresses) ;
67my (@addr_dcs_of_domain, @found_dcs, %address2dc) ;
68my (@dc_query) ;
69
70# tsitc> /usr/local/samba/bin/nmblookup -R -U wins ipa01
71# Sending queries to 192.168.1.29
72# 192.168.1.16 ipa01<00>
73
74eval {
75 alarm($TIMEOUT) ;
76 @dc_query = $debug ? map { $NMBLOOKUP->($wins, "$_#20", '-d ' . SAMBA_DEBUG_LVL) } @my_dcs :
77 map { ( $NMBLOOKUP->($wins, "$_#20", '') )[1] } @my_dcs ;
78 alarm(0) ;
79} ;
80
81if ($@ and $@ =~ /Alarm clock restart/) {
82 print qq(Failed. Timeout while waiting for response from (one of) "$NMBLOOKUP_CMD $wins @my_dcs"\n) ;
83 exit $ERRORS{"CRITICAL"} ;
84}
85
86if ($@ and $@ !~ /Alarm clock restart/) {
87 print qq(Failed. "$@" in response to "NMBLOOKUP_CMD $wins @my_dcs"\n) ;
88 exit $ERRORS{"UNKNOWN"} ;
89}
90
91chomp @dc_query ;
92if ( scalar grep(/name_query failed/, @dc_query) ) {
93 print qq(Failed. WINS "$wins" failed to resolve), scalar @my_dcs > 1 ? ' at least one of ' : ' ', qq("@my_dcs", the domain controller(s) of "$domain". Got "@dc_query"\n) ;
94 exit $ERRORS{"CRITICAL"} ;
95}
96
97=begin comment
98
99the results of looking up the DCs (by their name) in the WINS
100
101192.168.1.16 ipa01<20>
102192.168.1.1 ipa02<20>
103192.168.1.104 ipa03<20>
104
105=end comment
106
107=cut
108
109@dc_addresses = () ;
110foreach (@dc_query) {
111 next unless /^(\S+)\s+(\S+?)<\S+?>$/ ;
112 $address2dc{$1} = $2 ;
113 push @dc_addresses, $1 ;
114}
115
116$netbios_name = "$domain#1C" ;
117
118eval {
119 alarm($TIMEOUT) ;
120 @dcs_of_domain = $NMBLOOKUP->($wins, $netbios_name, defined $debug ? '-d ' . SAMBA_DEBUG_LVL : '') ;
121 alarm(0) ;
122
123} ;
124
125if ($@ and $@ =~ /Alarm clock restart/) {
126 print qq(Failed. Timeout while waiting for response from "$NMBLOOKUP_CMD $wins $netbios_name"\n) ;
127 exit $ERRORS{"CRITICAL"} ;
128}
129
130if ($@ and $@ !~ /Alarm clock restart/) {
131 print qq(Failed. "$@" in response to "$NMBLOOKUP_CMD $wins $netbios_name"\n) ;
132 exit $ERRORS{"UNKNOWN"} ;
133}
134
135shift @dcs_of_domain ;
136chomp @dcs_of_domain ;
137@addr_dcs_of_domain = map /^(\S+)/, @dcs_of_domain ;
138
139=begin comment
140
141tsitc> /usr/local/samba/bin/nmblookup -R -U wins ipaustralia#1c
142Sending queries to 192.168.1.29
143192.168.1.114 ipaustralia<1c>
144192.168.1.221 ipaustralia<1c>
145192.168.1.61 ipaustralia<1c>
146192.168.1.129 ipaustralia<1c>
147192.168.1.128 ipaustralia<1c>
148192.168.1.214 ipaustralia<1c>
149192.168.1.67 ipaustralia<1c>
150tsitc>
151
152=end comment
153
154=cut
155
156
157my %x ;
158@found_dcs = grep { ! $x{$_}++ } @address2dc{ grep exists $address2dc{$_}, @addr_dcs_of_domain} ;
159# @found_dcs = grep { defined $_} @address2dc{ grep exists $address2dc{$_}, @addr_dcs_of_domain} ;
160 # Gotcha.
161 # 'exists' is necessary to prevent autovivificatiton
162 # of keys in %address2dc
163
164if ( &set_eq( \@found_dcs, [ values %address2dc ] ) ) {
165 print $debug ? qq(Ok. WINS named "$wins" resolved addresses of "@my_dcs" as "@dc_query" and controllers of domain "$domain" as "@dcs_of_domain"\n) :
166 qq(Ok. Found controllers named "@my_dcs" in response to "$domain#1C" name query from WINS named "$wins".\n) ;
167 exit $ERRORS{"OK"} ;
168} elsif ( scalar @found_dcs == 0 ) {
169 print qq(Failed. Found __no__ controllers named "@my_dcs" in response to "$domain#1C" query from WINS named "$wins". Got "@dcs_of_domain"\n) ;
170 exit $ERRORS{"CRITICAL"} ;
171} elsif ( scalar @found_dcs < scalar keys %address2dc ) {
172 print qq(Warning. Not all domain controllers found in response to "$domain#1C" query from WINS named "$wins". Expected "@my_dcs", got "@found_dcs"\n) ;
173 exit $ERRORS{"WARNING"} ;
174}
175
176sub set_eq {
177
178 return 0 unless scalar @{$_[0]} == scalar @{$_[1]} ;
179 foreach my $a ( @{$_[0]} ) {
180 return 0 unless scalar grep { $a eq $_ } @{$_[1]} ;
181 }
182 return 1 ;
183
184}
185
186
187sub print_usage () {
188 print "Usage: $PROGNAME -W <wins> -D <domain>\n";
189}
190
191sub print_help () {
192 print_revision($PROGNAME,'$Revision: 940 $ ');
193 print "Copyright (c) 2001 Karl DeBisschop/S Hopcroft
194
195Perl Check WINS plugin for NetSaint.
196
197Returns OK if the addresses of domain controllers are found in the list of domain controllers returned in the WINS response to a 'domain controllers query'
198
199Why would you want to do this ?
200
201MS File server clients insist on connecting to file servers using NetBIOS names.
202If they __don't__ resolve NetBIOS names with a WINS (NBNS) then they'll either fail to logon and connect to shares or they will
203broadcast requsts for names.
204Both problems are eliminated by a healthy WINS.
205Also, you may have a MS domain spanning a number of WAN connected sites, with domain controllers far away from powerful local
206domain controllers.
207In this case, you want your local clients to have their logon requests validated by the local controllers.
208
209The plugin works by
210 asking the WINS to resolve the addresses of the domain controllers (supplied by -C or from the constant MY_DCS)
211 asking the WINS to return the list of addresses of the domain controllers able to validate requests for the domain
212 whose name is given by -D
213 returning Ok if all controller addresses are in that list (of addresses of domain controllers) or
214 returning WARNING if not all the controller addresses are in the list or
215 returning CRITICAL if there is no reply from the WINS or the list contains none of the contoller addresses
216
217";
218 print_usage();
219 print '
220-W, --wins=STRING
221 Hostname or address of the WINS (Either Samba/nmbd or MS product)
222-D, --domain=STRING
223 MS Domain name to find the Domain controllers of.
224-C, --controllers:STRING
225 Optional __name(s)__ of domain controller that __must__ be found in the response to a domain controller name query.
226 If not defined, then use the constant value MY_DCS. You must use either -C or make sure that MY_DCS contains the names
227 of __your__ domain controllers.
228-T, --timeout:INTEGER
229-d, --debug
230 Debugging output.
231-h, --help
232 This stuff.
233
234';
235 support();
236}
237
238sub version () {
239 print_revision($PROGNAME,'$Revision: 940 $ ');
240 exit $ERRORS{'OK'};
241}
242
243sub help () {
244 print_help();
245 exit $ERRORS{'OK'};
246}
247