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gen-interface-templates.pl
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gen-interface-templates.pl
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#!/usr/bin/perl
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2009 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Stephen Hemminger
# Date: March 2009
# Description: Script to automatically generate per-interface arp options
# templates.
#
# **** End License ****
use strict;
use warnings;
# set DEBUG in environment to test script
my $debug = $ENV{'DEBUG'};
# Mapping from configuration level to ifname used AT THAT LEVEL
my %interface_hash = (
'ethernet/node.tag' => '$VAR(@)',
'ethernet/node.tag/vif/node.tag' => '$VAR(../@).$VAR(@)',
'ethernet/node.tag/vif-s/node.tag' => '$VAR(../@).$VAR(@)',
'ethernet/node.tag/vif-s/node.tag/vif-c/node.tag' => '$VAR(../../@).$VAR(../@).$VAR(@)',
'wireless/node.tag' => '$VAR(@)',
'wireless/node.tag/vif/node.tag' => '$VAR(../@).$VAR(@)',
'pseudo-ethernet/node.tag' => '$VAR(@)',
'pseudo-ethernet/node.tag/vif/node.tag' => '$VAR(../@).$VAR(@)',
'pseudo-ethernet/node.tag/vif-s/node.tag' => '$VAR(../@).$VAR(@)',
'pseudo-ethernet/node.tag/vif-s/node.tag/vif-c/node.tag' => '$VAR(../../@).$VAR(../@).$VAR(@)',
'bonding/node.tag' => '$VAR(@)',
'bonding/node.tag/vif/node.tag' => '$VAR(../@).$VAR(@)',
'bonding/node.tag/vif-s/node.tag' => '$VAR(../@).$VAR(@)',
'bonding/node.tag/vif-s/node.tag/vif-c/node.tag' => '$VAR(../../@).$VAR(../@).$VAR(@)',
'tunnel/node.tag' => '$VAR(@)',
'bridge/node.tag' => '$VAR(@)',
'vxlan/node.tag' => '$VAR(@)',
);
# Hash table to check if the priority needs to set @ root
# of the node.def which is generated.
my %interface_prio = ();
sub gen_template {
my ( $inpath, $outpath, $ifname, $gen_prio, $prio, $depth ) = @_;
print $outpath, "\n" if ($debug);
opendir my $d, $inpath
or die "Can't open: $inpath:$!";
# walk through sample templates
foreach my $name ( grep { !/^\./ } readdir $d ) {
my $in = "$inpath/$name";
my $out = "$outpath/$name";
# recurse into subdirectory
if ( -d $in ) {
my $subif = $ifname;
$subif =~ s#@\)#../@)#g if ($name ne 'node.tag');
( -d $out )
or mkdir($out)
or die "Can't create $out: $!";
gen_template( $in, $out, $subif, $gen_prio, $prio, $depth+1);
next;
}
print "in: $in out: $out\n" if ($debug);
open my $inf, '<', $in or die "Can't open $in: $!";
open my $outf, '>', $out or die "Can't open $out: $!";
# For the top node.tag create the priority tag.
if ($name eq 'node.def' && $gen_prio == 1 && $depth <= 1) {
print $outf "priority: $prio\n";
}
while ( my $line = <$inf> ) {
$line =~ s#\$IFNAME#$ifname#;
print $outf $line;
}
close $inf;
close $outf or die "Close error $out:$!";
}
closedir $d;
}
sub mkdir_p {
my $path = shift;
return 1 if ( mkdir($path) );
my $pos = rindex( $path, "/" );
return unless $pos != -1;
return unless mkdir_p( substr( $path, 0, $pos ) );
return mkdir($path);
}
die "Usage: $0 output_directory\n" if ($#ARGV < 0);
my $outdir = $ARGV[0];
foreach my $if_tree ( keys %interface_hash ) {
my $inpath = "interface-templates";
my $outpath = "$outdir/interfaces/$if_tree";
( -d $outpath )
or mkdir_p($outpath)
or die "Can't create $outpath:$!";
my $gen_prio = 0;
my $prio = 0;
$gen_prio = 1 if (exists $interface_prio{ $if_tree });
if ($gen_prio == 1) {
$prio = $interface_prio{ $if_tree };
}
gen_template( $inpath, $outpath, $interface_hash{$if_tree},
$gen_prio, $prio, 0 );
}