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LANforge/Utils: gains mac_add() routine; requires Math::BigInt. Tested on F24

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This commit is contained in:
Jed Reynolds
2020-04-29 00:44:58 -07:00
parent 845bbf6ba9
commit da4d6cbe3a
1 changed files with 13 additions and 7 deletions
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20
LANforge/Utils.pm
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@@ -3,7 +3,8 @@ use strict;
use warnings; use warnings;
use Carp; use Carp;
use Net::Telnet; use Net::Telnet;
use bigint; #use bigint;
use Math::BigInt;
$| = 1; $| = 1;
#$SIG{ __DIE__ } = sub { Carp::confess( @_ ) }; #$SIG{ __DIE__ } = sub { Carp::confess( @_ ) };
#$SIG{ __WARN__ } = sub { Carp::confess( @_ ) }; #$SIG{ __WARN__ } = sub { Carp::confess( @_ ) };
@@ -1160,18 +1161,23 @@ sub expand_unit_str {
} }
sub mac_add { sub mac_add {
my ($first_mac, $second_dec) = @_; my ($self, $first_mac, $second_dec) = @_;
$first_mac =~ s/[:]//g if ($first_mac =~ /[:]/); $first_mac =~ s/[:]//g if ($first_mac =~ /[:]/);
$first_mac = "0x".$first_mac if ($first_mac !~ /^0x/); $first_mac = "0x".$first_mac if ($first_mac !~ /^0x/);
my $newdec = Math::BigInt->new($first_mac);
my $newdec = (0+$second_dec) + hex($first_mac); $newdec->badd(0+$second_dec);
my $newhex = sprintf("%x", $newdec); my $pad = Math::BigInt->new('0x1000000000000');
$newdec->badd($pad);
my $newhex = "".$newdec->as_hex();
my $rv = ""; my $rv = "";
$newhex = substr($newhex, -12); # we begin 0x100...much bigger than we need
for (my $i = length($newhex); $i > 0; $i-=2) { for (my $i = length($newhex); $i > 0; $i-=2) {
$rv = substr($newhex, $i-2, 2).":$rv"; $rv = substr($newhex, $i-2, 2).":$rv";
} }
return substr($newhex, 0, -1); $rv =substr($rv, 0, -1);
undef($newdec);
undef($pad);
return $rv;
} }