Add check_ifstatus option to ignore interfaces by name

Ignoring by index is not always an option, as the index can change on
chassis switches as blade configurations change.

1 files changed, 38 insertions, 19 deletions

diff --git a/plugins-scripts/check_ifstatus.pl b/plugins-scripts/check_ifstatus.pl
index 709ad17..9aa2515 100755
--- a/plugins-scripts/check_ifstatus.pl
+++ b/plugins-scripts/check_ifstatus.pl
@@ -9,6 +9,7 @@
 #  Added -u option (4/2003)
 #  Added -M option (10/2003)
 #  Added SNMPv3 support (10/2003)
+#  Added -n option (07/2014)
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -95,8 +96,10 @@ my $ifXTable;
 my $opt_h ;
 my $opt_V ;
 my $opt_u;
+my $opt_n;
 my $opt_x ;
 my %excluded ;
+my %unused_names ;
 my @unused_ports ;
 my %session_opts;
 
@@ -171,27 +174,30 @@ alarm(0);
 foreach $key (keys %ifStatus) {
 
         # skip unused interfaces
-        if (!defined($ifStatus{$key}{'notInUse'})) {
+        my $ifName = $ifStatus{$key}{$snmpIfDescr};
+
+        if (!defined($ifStatus{$key}{'notInUse'}) || !grep(/^${ifName}/, @unused_ports )) {
                 # check only if interface is administratively up
-    if ($ifStatus{$key}{$snmpIfAdminStatus} == 1 ) {
-    
-                        # check only if interface type is not listed in %excluded
-                        if (!defined $excluded{$ifStatus{$key}{$snmpIfType}} ) {
-                                if ($ifStatus{$key}{$snmpIfOperStatus} == 1 ) { $ifup++ ;}
-                                if ($ifStatus{$key}{$snmpIfOperStatus} == 2 ) {
-                                                                $ifdown++ ;
-                                                                if (defined $ifXTable) {
-                                                                        $ifmessage .= sprintf("%s: down -> %s<BR>",
-                                $ifStatus{$key}{$snmpIfName},
-                                                                                                                                $ifStatus{$key}{$snmpIfAlias});
-                                                                }else{
-                                                                        $ifmessage .= sprintf("%s: down <BR>",
-                                                                                                                                $ifStatus{$key}{$snmpIfDescr});
-                                                                }
+                if ($ifStatus{$key}{$snmpIfAdminStatus} == 1 ) {
+                        #check only if interface is not excluded
+                        if (!defined $unused_names{$ifStatus{$key}{$snmpIfDescr}} ) {
+                                # check only if interface type is not listed in %excluded
+                                if (!defined $excluded{$ifStatus{$key}{$snmpIfType}} ) {
+                                        if ($ifStatus{$key}{$snmpIfOperStatus} == 1 ) { $ifup++ ; }
+                                        if ($ifStatus{$key}{$snmpIfOperStatus} == 2 ) {
+                                                                        $ifdown++ ;
+                                                                        if (defined $ifXTable) {
+                                                                                $ifmessage .= sprintf("%s: down -> %s<BR>\n", $ifStatus{$key}{$snmpIfName}, $ifStatus{$key}{$snmpIfAlias});
+                                                                        }else{
+                                                                                $ifmessage .= sprintf("%s: down <BR>\n",$ifStatus{$key}{$snmpIfDescr});
+                                                                        }
+                                        }
+                                        if ($ifStatus{$key}{$snmpIfOperStatus} == 5 ) { $ifdormant++ ;}
+                                } else {
+                                        $ifexclude++;
                                 }
-                                if ($ifStatus{$key}{$snmpIfOperStatus} == 5 ) { $ifdormant++ ;}
-                        }else{
-                                $ifexclude++;
+                        } else {
+                                $ifunused++;
                         }
                 
                 }
@@ -259,6 +265,8 @@ sub print_help() {
         printf "                     the descriptive name.  Do not use if you don't know what this is. \n";
         printf "   -x (--exclude)    A comma separated list of ifType values that should be excluded \n";
         printf "                     from the report (default for an empty list is PPP(23).\n";
+        printf "   -n (--unused_ports_by_name) A comma separated list of ifDescr values that should be excluded \n";
+        printf "                     from the report (default is an empty exclusion list).\n";
         printf "   -u (--unused_ports) A comma separated list of ifIndex values that should be excluded \n";
         printf "                     from the report (default is an empty exclusion list).\n";
         printf "                     See the IANAifType-MIB for a list of interface types.\n";
@@ -299,6 +307,7 @@ sub process_arguments() {
                 "I"             => \$ifXTable, "ifmib" => \$ifXTable,
                 "x:s"           =>      \$opt_x,   "exclude:s" => \$opt_x,
                 "u=s" => \$opt_u,  "unused_ports=s" => \$opt_u,
+                "n=s" => \$opt_n, "unused_ports_by_name=s" => \$opt_n,
                 "M=i" => \$maxmsgsize, "maxmsgsize=i" => \$maxmsgsize,
                 "t=i" => \$timeout,    "timeout=i" => \$timeout,
                 );
@@ -406,6 +415,16 @@ sub process_arguments() {
                 }
         }
         
+        # Excluded interface descriptors
+        if (defined $opt_n) {
+                my @unused = split(/,/,$opt_n);
+                if ( @unused ) {
+                        foreach $key (@unused) {
+                                $unused_names{$key} = 1;
+                        }
+                }
+        }
+
         # Excluded interface ports (ifIndex) - management reasons
         if ($opt_u) {
                 @unused_ports = split(/,/,$opt_u);