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#!/usr/bin/env perl
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#!/usr/bin/env perl
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use warnings;
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use warnings;
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use strict;
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use strict;
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# Description: Networking for Unix systems
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our $VERSION = '1.3';
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use version ; our $VERSION = '1.3';
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# Linux network module for sysinfo client
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# Linux network module for sysinfo client
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# Author: R. W. Rodolico
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# Author: R. W. Rodolico
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# Date:   2016-04-08
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# Date:   2016-04-08
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# module to get network interface information for Linux systems
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# module to get network interface information for Linux systems
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# assumes ifconfig is on the system and executable by the user
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# assumes ifconfig is on the system and executable by the user
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# NOTE: this takes the ifconfig output and parses it, so changes to
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# NOTE: this takes the ifconfig output and parses it, so changes to
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#       this output invalidates this module
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#       this output invalidates this module
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#
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#
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# Revision History
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# 2018-05-20 RWR
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# 2018-05-20 RWR
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# Modified to use ip vs ifconfig, and changed the regex's.
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# Modified to use ip vs ifconfig, and changed the regex's.
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# kept the original ifconfig code but commented it out
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# kept the original ifconfig code but commented it out
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# find our location and use it for searching for libraries
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# find our location and use it for searching for libraries. library.pm must be in the same directory as the calling script
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# or, if run interactively, in the parent of the modules
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BEGIN {
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BEGIN {
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   use FindBin;
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   use FindBin;
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   use File::Spec;
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   use File::Spec;
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   use lib File::Spec->catdir($FindBin::Bin);
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   # prepend the bin directory and its parent
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   eval( 'use library;' ); die "Could not find library.pm in the code directory\n" if $@;
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   use lib File::Spec->catdir($FindBin::Bin), File::Spec->catdir("$FindBin::Bin/..");
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   eval( 'use Data::Dumper;' );
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   eval( 'use library;' );
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   die sprintf( "Could not find library.pm in %s, INC is %s\n", __FILE__, join( "\n", @INC ) ) if $@;
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}
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}
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#####
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# check for valid OS.
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##### Change these to match your needs
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#####
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# Make this a list of all the modules we are going to use. You can replace undef with the version you need, if you like
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my $modulesList = {
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exit 1 unless &checkOS( { 'linux' => undef } );
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        'Data::Dumper'     => undef,
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   };
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# check for required commands, return 2 if they don't exist. Enter an full list of all commands required. If one doesn't exist
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# hash of commands that are needed for the system. key is the name of the command and, in some cases, the value will become
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# script returns a 2
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# the full path (from which or where)
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foreach my $command ( 'ip' ) {
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my $commandsList = {
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   exit 2 unless &validCommandOnSystem( $command );
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        'ip' => undef,
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   };
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}
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# list of operating systems this module can be used on.
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my $osList = {
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#         'mswin32' => undef,
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#         'freebsd' => undef,
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         'linux'   => undef,
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   };
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# the category the return data should go into. See sysinfo for a list
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my $CATEGORY = 'network';
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my $CATEGORY = 'network';
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#####
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##### End of required
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#####
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# some variables needed for our system
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my $errorPrepend = 'error: in ' . __FILE__; # this is prepended to any error messages
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my @out; # temporary location for each line of output
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# Try to load the modules we need. If we can not, then make a list of missing modules for error message.
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for my $module ( keys %$modulesList ) {
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   eval ( "use $module;" );
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   push @out, "$errorPrepend Could not load $module" if $@;
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}
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if ( ! @out && ! checkOS ( $osList ) ) { # check if we are on an acceptible operating system
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    push @out, "$errorPrepend Invalid Operating System";
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}
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if ( !@out && ! validCommandOnSystem ( $commandsList ) ) {
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   push @out, "$errorPrepend Can not find some commands needed";
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}
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if ( !@out ) { # we made it, we have everything, so do the processing
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   #####
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   ##### Your code starts here. Remember to push all output onto @out
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   #####
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# get list of all interfaces except lo
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   # get list of all interfaces except lo
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my @interfaces = `ip -o a s | cut -d' ' -f2 | sort | uniq | grep -v 'lo'`;
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   my @interfaces = `ip -o a s | cut -d' ' -f2 | sort | uniq | grep -v 'lo'`;
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chomp @interfaces;
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   chomp @interfaces;
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my $ipv4Regex = '\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b';
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   my $ipv4Regex = '\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b';
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my $ipv6Regex = '(([a-f0-9]+):{1,2})+[a-z0-9]+';
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   my $ipv6Regex = '(([a-f0-9]+):{1,2})+[a-z0-9]+';
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foreach my $if ( @interfaces ) {
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   foreach my $if ( @interfaces ) {
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   foreach my $line ( `ip address show $if` ) {
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      foreach my $line ( `ip address show $if` ) {
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      # mtu
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         # mtu
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      if ( $line =~ m/mtu\s+(\d+)/i ) {
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         if ( $line =~ m/mtu\s+(\d+)/i ) {
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         print "$CATEGORY\t$if\tmtu\t$1\n";
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            push @out, "$CATEGORY\t$if\tmtu\t$1";
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      # MAC
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         # MAC
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      } elsif ( $line =~ m/((([a-f0-9]{2}):){5}[a-f0-9]+)/i ) {
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         } elsif ( $line =~ m/((([a-f0-9]{2}):){5}[a-f0-9]+)/i ) {
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         print "$CATEGORY\t$if\tmac\t$1\n";
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            push @out, "$CATEGORY\t$if\tmac\t$1";
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      # inet 6
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         # inet 6
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      } elsif ( $line =~ m"inet6\s*((([a-f0-9]+):{1,2})+[a-z0-9]+)/(\d{1,2})"i ) {
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         } elsif ( $line =~ m"inet6\s*((([a-f0-9]+):{1,2})+[a-z0-9]+)/(\d{1,2})"i ) {
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         print "$CATEGORY\t$if\tip6address\t$1\n";
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            push @out, "$CATEGORY\t$if\tip6address\t$1";
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         print "$CATEGORY\t$if\tip6networkbits\t$4\n";
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            push @out, "$CATEGORY\t$if\tip6networkbits\t$4";
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      # inet 4
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         # inet 4
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      } elsif ( $line =~ m"inet.*($ipv4Regex)/(\d{2})" ) {
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         } elsif ( $line =~ m"inet.*($ipv4Regex)/(\d{2})" ) {
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         print "$CATEGORY\t$if\taddress\t$1\n";
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            push @out, "$CATEGORY\t$if\taddress\t$1";
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         print "$CATEGORY\t$if\tnetmask\t$2\n";
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            push @out, "$CATEGORY\t$if\tnetmask\t$2";
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         }
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      }
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      }
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   }
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   }
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   #####
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   ##### Your code ends here.
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   #####
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}
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}
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# this is the original code, in case we ever need it again
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# If we are testing from the command line (caller is undef), print the results for debugging
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print join( "\n", @out ) . "\n" unless caller;
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# called by do, which has a value of the last assignment made, so make the assignment. The equivilent of a return
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my $return = join( "\n", @out );
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## eth1      Link encap:Ethernet  HWaddr 00:16:3E:1F:EF:4F
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#my $regexHWADDR = 'hwaddr[^0-9a-f:]+([0-9a-f:]+)[^0-9a-f:]';
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## inet addr:10.110.110.2  Bcast:10.110.110.255  Mask:255.255.255.0
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#my $regexINET = 'inet addr:\s*([0-9.]+)[^0-9].*mask:([0-9.]+)';
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## inet6 addr: fe80::216:3eff:fe1f:ef4f/64 Scope:Link
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#my $regexINET6 = 'inet6 addr: ([0-9a-f:]+)\/([0-9]+)[^0-9]';
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## UP LOOPBACK RUNNING  MTU:16436  Metric:1
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#my $regexMTU = 'mtu:([0-9]+)[^0-9]';
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#my $temp = qx/$command/;
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#my @temp = split( "\n", $temp );
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#my $currentIF;
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#while ( @temp ) {
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#   my $line = shift @temp;
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#   next unless $line;
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#   if ( $line =~ m/^([^ ]+) /) { # if the first character is not a space, starting new entry
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#      $currentIF = $1;
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#      if ( $line =~ m/$regexHWADDR/i ) {
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#         print "$CATEGORY\t$currentIF\tmac\t$1\n";
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#      } else {
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#         print "$CATEGORY\t$currentIF\tmac\tunknown\n";
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#      }
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#   } elsif ( $line =~ m/$regexINET/i ) {
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#      print "$CATEGORY\t$currentIF\taddress\t$1\n";
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#      print "$CATEGORY\t$currentIF\tnetmask\t$2\n";
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#   } elsif ( $line =~ m/$regexINET6/i )  {
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#      print "$CATEGORY\t$currentIF\tip6address\t$1\n";
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#      print "$CATEGORY\t$currentIF\tip6networkbits\t$2\n";
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#   } elsif ( $line =~ m/$regexMTU/i )  {
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#      print "$CATEGORY\t$currentIF\tmtu\t$1\n";
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#   }
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#}
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#
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