118 lines
3.3 KiB
Perl
118 lines
3.3 KiB
Perl
package App::Netdisco::Worker::Plugin::Arpnip::Nodes;
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use Dancer ':syntax';
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use App::Netdisco::Worker::Plugin;
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use aliased 'App::Netdisco::Worker::Status';
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use App::Netdisco::Transport::SNMP ();
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use App::Netdisco::Util::Node 'check_mac';
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use App::Netdisco::Util::FastResolver 'hostnames_resolve_async';
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use Dancer::Plugin::DBIC 'schema';
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use Time::HiRes 'gettimeofday';
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use NetAddr::MAC ();
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register_worker({ stage => 'main', driver => 'snmp' }, sub {
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my ($job, $workerconf) = @_;
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my $device = $job->device;
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my $snmp = App::Netdisco::Transport::SNMP->reader_for($device)
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or return Status->defer("arpnip failed: could not SNMP connect to $device");
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# get v4 arp table
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my $v4 = get_arps($device, $snmp->at_paddr, $snmp->at_netaddr);
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# get v6 neighbor cache
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my $v6 = get_arps($device, $snmp->ipv6_n2p_mac, $snmp->ipv6_n2p_addr);
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# would be possible just to use now() on updated records, but by using this
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# same value for them all, we _can_ if we want add a job at the end to
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# select and do something with the updated set (no reason to yet, though)
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my $now = 'to_timestamp('. (join '.', gettimeofday) .')';
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# update node_ip with ARP and Neighbor Cache entries
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store_arp(\%$_, $now) for @$v4;
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debug sprintf ' [%s] arpnip - processed %s ARP Cache entries',
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$device->ip, scalar @$v4;
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store_arp(\%$_, $now) for @$v6;
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debug sprintf ' [%s] arpnip - processed %s IPv6 Neighbor Cache entries',
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$device->ip, scalar @$v6;
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$device->update({last_arpnip => \$now});
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return Status->done("Ended arpnip for $device");
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});
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# get an arp table (v4 or v6)
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sub get_arps {
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my ($device, $paddr, $netaddr) = @_;
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my @arps = ();
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while (my ($arp, $node) = each %$paddr) {
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my $ip = $netaddr->{$arp};
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next unless defined $ip;
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next unless check_mac($device, $node);
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push @arps, {
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node => $node,
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ip => $ip,
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dns => undef,
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};
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}
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debug sprintf ' resolving %d ARP entries with max %d outstanding requests',
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scalar @arps, $ENV{'PERL_ANYEVENT_MAX_OUTSTANDING_DNS'};
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my $resolved_ips = hostnames_resolve_async(\@arps);
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return $resolved_ips;
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}
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=head2 store_arp( \%host, $now? )
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Stores a new entry to the C<node_ip> table with the given MAC, IP (v4 or v6)
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and DNS host name. Host details are provided in a Hash ref:
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{
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ip => '192.0.2.1',
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node => '00:11:22:33:44:55',
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dns => 'myhost.example.com',
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}
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The C<dns> entry is optional. The update will mark old entries for this IP as
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no longer C<active>.
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Optionally a literal string can be passed in the second argument for the
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C<time_last> timestamp, otherwise the current timestamp (C<now()>) is used.
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=cut
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sub store_arp {
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my ($hash_ref, $now) = @_;
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$now ||= 'now()';
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my $ip = $hash_ref->{'ip'};
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my $mac = NetAddr::MAC->new($hash_ref->{'node'});
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my $name = $hash_ref->{'dns'};
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return if !defined $mac or $mac->errstr;
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schema('netdisco')->txn_do(sub {
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my $current = schema('netdisco')->resultset('NodeIp')
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->search(
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{ ip => $ip, -bool => 'active'},
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{ columns => [qw/mac ip/] })->update({active => \'false'});
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schema('netdisco')->resultset('NodeIp')
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->update_or_create(
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{
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mac => $mac->as_ieee,
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ip => $ip,
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dns => $name,
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active => \'true',
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time_last => \$now,
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},
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{
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key => 'primary',
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for => 'update',
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});
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});
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}
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true;
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