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| -rwxr-xr-x | admin-tools/README | 1 | ||||
| -rw-r--r-- | admin-tools/dhcpremember.pl | 80 |
2 files changed, 81 insertions, 0 deletions
diff --git a/admin-tools/README b/admin-tools/README index e585704..7d72e55 100755 --- a/admin-tools/README +++ b/admin-tools/README @@ -2,5 +2,6 @@ This directory is for administration tools. Files: ravpnlist.pl Export remote-acces VPN user list to plain text or CSV. +dhcpremember.pl Generate static mapping commands from DHCP leases. diff --git a/admin-tools/dhcpremember.pl b/admin-tools/dhcpremember.pl new file mode 100644 index 0000000..1881078 --- /dev/null +++ b/admin-tools/dhcpremember.pl @@ -0,0 +1,80 @@ +#!/usr/bin/env perl +# +# Generates static mapping commands from the DHCP leases op mode command output +# +# On VyOS and Vyatta, invoke like "run show dhcp server leases | /config/scripts/dhcpremember.pl" +# On EdgeOS, invoke like "run show dhcp leases | /config/scripts/dhcpremember.pl" +# +# Copyright (C) 2014 Daniil Baturin +# +# Permission is hereby granted, free of charge, to any person obtaining a copy of +# this software and associated documentation files (the "Software"), to deal in +# the Software without restriction, including without limitation the rights to +# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +# of the Software, and to permit persons to whom the Software is furnished to do +# so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in all +# copies or substantial portions of the Software. + +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +# SOFTWARE. + +use lib "/opt/vyatta/share/perl5/"; + +use strict; +use warnings; +use Vyatta::Config; +use NetAddr::IP; + +my $config = new Vyatta::Config(); + +while(<>) +{ + # skip headers + if( $_ !~ /\d\.?/ ) + { + next; + } + + # Lease line format: <IPv4> <MAC> <Lease time> <Pool> <Client name> + my @values = split /\s+/, $_; + my $ip = $values[0]; + my $mac = $values[1]; + my $pool = $values[4]; + my $client = undef; + + # Client name may not be present + if( defined($values[5]) ) + { + $client = $values[5]; + } + else + { + $client = $ip; + } + my $subnet = "CHANGME"; # For the case it isn't detected from the config + + # Get subnet for the pool + my @subnets = $config->listNodes("service dhcp-server shared-network-name $pool subnet"); + my $ip_object = new NetAddr::IP("$ip/32"); + foreach my $subnet_str (@subnets) + { + my $subnet_object = new NetAddr::IP($subnet_str); + if( $ip_object->within($subnet_object) ) + { + $subnet = $subnet_str; + } + } + + $client = $ip unless defined($client); + + print "set service dhcp-server shared-network-name $pool subnet $subnet static-mapping $client ip-address $ip\n"; + print "set service dhcp-server shared-network-name $pool subnet $subnet static-mapping $client mac-address $mac\n"; +} + |