package App::Netdisco::SSHCollector::Platform::ACE;
# vim: set expandtab tabstop=8 softtabstop=4 shiftwidth=4:
=head1 NAME
App::Netdisco::SSHCollector::Platform::ACE
=head1 DESCRIPTION
Collect ARP entries from Cisco ACE load balancers. ACEs have multiple
virtual contexts with individual ARP tables. Contexts are enumerated
with C<show context>, afterwards the commands C<changeto CONTEXTNAME> and
C<show arp> must be executed for every context.
The IOS shell does not permit to combine mulitple commands in a single
line, and Net::OpenSSH uses individual connections for individual commands,
so we need to use Expect to execute the changeto and show commands in
the same context.
=cut
use strict;
use warnings;
use Dancer ':script';
use Expect;
use Moo;
=head1 PUBLIC METHODS
=over 4
=item B<arpnip($host, $ssh)>
Retrieve ARP entries from device. C<$host> is the hostname or IP address
of the device. C<$ssh> is a Net::OpenSSH connection to the device.
Returns a list of hashrefs in the format C<{ mac => MACADDR, ip => IPADDR }>.
=cut
sub arpnip{
my ($self, $hostlabel, $ssh, $args) = @_;
debug "$hostlabel $$ arpnip()";
my ($pty, $pid) = $ssh->open2pty or die "unable to run remote command";
my $expect = Expect->init($pty);
my ($pos, $error, $match, $before, $after);
my $prompt = qr/#/;
($pos, $error, $match, $before, $after) = $expect->expect(10, -re, $prompt);
$expect->send("terminal length 0\n");
($pos, $error, $match, $before, $after) = $expect->expect(5, -re, $prompt);
$expect->send("show context | include Name\n");
($pos, $error, $match, $before, $after) = $expect->expect(5, -re, $prompt);
my @ctx;
my @arpentries;
for (split(/\n/, $before)){
if (m/Name: (\S+)/){
push(@ctx, $1);
$expect->send("changeto $1\n");
($pos, $error, $match, $before, $after) = $expect->expect(5, -re, $prompt);
$expect->send("show arp\n");
($pos, $error, $match, $before, $after) = $expect->expect(5, -re, $prompt);
for (split(/\n/, $before)){
my ($ip, $mac) = split(/\s+/);
if ($ip =~ m/(\d{1,3}\.){3}\d{1,3}/ && $mac =~ m/[0-9a-f.]+/i) {
push(@arpentries, { ip => $ip, mac => $mac });
}
}
}
}
$expect->send("exit\n");
$expect->soft_close();
return @arpentries;
}
1;