aredn/files/usr/local/bin/olsrd-namechange

#!/usr/bin/perl
=for commnet

  Part of BBHN Mesh -- Used for creating Amateur Radio friendly mesh networks
  Copyright (C) 2015 Conrad Lara
   See Contributors file for additional contributors

  Copyright (c) 2013 David Rivenburg et al. BroadBand-HamNet

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation version 3 of the License.

  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.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

=cut

# do nothing if olsrd is not running
exit if system "ps | grep -v grep | grep -q 'olsrd '";

($uptime) = `cat /proc/uptime` =~ /^(\d+)/;

# load the hosts file
foreach(`cat /var/run/hosts_olsr 2>/dev/null`)
{
    next unless /^\d/;
    ($ip, $name, $junk, $originator, $mid) = split /\s+/, $_;
    next unless $originator;
    next if $originator eq "myself";
    next unless ($ip eq $originator) or (defined $mid and $mid eq "(mid");
    if($hosts{$ip}) { $hosts{$ip} .= "/$name" }
    else            { $hosts{$ip}  = $name }
}

# find the current neighbors
foreach(`echo /links | nc 127.0.0.1 2006 2>/dev/null`)
{
    next unless /^\d/;
    ($my_ip, $ip) = split /\s+/, $_;
    $history{$ip}{age} = $uptime;
    $history{$ip}{name} = $hosts{$ip};
}

exit unless keys %history;

# load and strip the current history
foreach(`cat /tmp/node.history 2>/dev/null`)
{
    chomp;
    ($ip, $age, $name) = split / /, $_;
    next unless $age;
    next if $history{$ip};
    next if $uptime - $age > 86400;
    $name = "" unless $name;
    $history{$ip}{age} = $age;
    $history{$ip}{name} = $name;
}

# write the new history
open(FILE, ">/tmp/node.history") or exit;
foreach $ip (keys %history)
{
    printf FILE "%s %s %s\n", $ip, $history{$ip}{age}, $history{$ip}{name};
}
close(FILE);