release/src/router/ebtables/ebtables-save

   1 #!/usr/bin/perl -w
   2 #
   3 #
   4 # A script that generates text output of the ebtables rules.
   5 # Similar to iptables-save.
   6 #
   7 # It can be used to store active configuration to /etc/sysconfig/ebtables
   8
   9 use strict;
  10 my $table;
  11 my $ebtables = "__EXEC_PATH__/ebtables";
  12 my $cnt = "";
  13 my $version = "1.0";
  14 my $table_name;
  15
  16 # ========================================================
  17 # Process filter table
  18 # ========================================================
  19 sub process_table {
  20     my $chain = "";
  21     my $rules = "";
  22     my $chains = "";
  23     my $line = "";
  24
  25     foreach $line (split("\n",$_[0])) {
  26         if ($line =~ m/Bridge table: (.*)/) {
  27             print "*$1\n";
  28             next;
  29         }
  30         if ($line =~ m/Bridge chain: (.*?), entries:.* policy: (.*)/) {
  31             $chains = $chains . ":$1 $2\n";
  32             $chain = $1;
  33             next;
  34         }
  35         if ($line =~ m/^$/) {
  36             next;
  37         }
  38         if ($cnt eq "--Lc") {
  39             $line =~ s/, pcnt = (.*) -- bcnt = (.*)/-c $1 $2/;
  40         } else {
  41             $line =~ s/ $//;
  42         }
  43         $rules = $rules . "-A $chain $line\n";
  44     }
  45
  46     print $chains;
  47     print $rules;
  48     print "\n";
  49 }
  50 # ========================================================
  51
  52 unless (-x $ebtables) { exit -1 };
  53 print "# Generated by ebtables-save v$version on " . `date`;
  54 if (defined($ENV{'EBTABLES_SAVE_COUNTER'}) && $ENV{'EBTABLES_SAVE_COUNTER'} eq "yes") {
  55     $cnt = "--Lc";
  56 }
  57 foreach $table_name (split("\n", `grep -E '^ebtable_' /proc/modules | cut -f1 -d' ' | sed s/ebtable_//`)) {
  58     $table =`$ebtables -t $table_name -L $cnt`;
  59     unless ($? == 0) { print $table; exit -1 };
  60     &process_table($table);
  61 }