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(diagnostics) add list arp table action

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Ad Schellevis 2016-01-05 11:59:47 +01:00
parent 78d59ba50f
commit 08d11e0d7e
1 changed files with 87 additions and 0 deletions
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src/opnsense/scripts/interfaces/list_arp.py Executable file
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#!/usr/local/bin/python2.7
"""
Copyright (c) 2016 Ad Schellevis
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
--------------------------------------------------------------------------------------
list arp table
"""
import tempfile
import subprocess
import os
import os.path
import sys
import ujson
if __name__ == '__main__':
result = []
# import mac manufacturer mac address table (index by mac prefix)
mac_table = {}
if os.path.isfile('/usr/local/share/nmap/nmap-mac-prefixes'):
for mac in open('/usr/local/share/nmap/nmap-mac-prefixes').read().split('\n'):
if len(mac) > 8:
mac_table[mac[0:6]] = mac[7:]
# import dhcp_leases (index by ip address)
dhcp_leases = {}
dhcp_leases_filename = '/var/dhcpd/var/db/dhcpd.leases'
if os.path.isfile(dhcp_leases_filename):
leases = open(dhcp_leases_filename, 'r').read()
for lease in leases.split('}'):
if lease.find('{') > -1:
dhcp_ipv4_address = lease.split('{')[0].split('lease')[1].strip()
if lease.find('client-hostname') > -1:
dhcp_leases[dhcp_ipv4_address] = {'hostname': lease.split('client-hostname')[1].strip()[1:-2]}
# parse arp output
with tempfile.NamedTemporaryFile() as output_stream:
subprocess.call(['/usr/sbin/arp', '-an'], stdout=output_stream, stderr=open(os.devnull, 'wb'))
output_stream.seek(0)
data = output_stream.read().strip()
for line in data.split('\n'):
line_parts = line.split()
if len(line_parts) > 3 and line_parts[3] != '(incomplete)':
record = {'mac': line_parts[3],
'ip': line_parts[1][1:-1],
'intf': line_parts[5],
'manufacturer': '',
'hostname': ''
}
manufacturer_mac = record['mac'].replace(':' ,'')[:6].upper()
if manufacturer_mac in mac_table:
record['manufacturer'] = mac_table[manufacturer_mac]
if record['ip'] in dhcp_leases:
record['hostname'] = dhcp_leases[record['ip']]['hostname']
result.append(record)
# handle command line argument (type selection)
if len(sys.argv) > 1 and sys.argv[1] == 'json':
print(ujson.dumps(result))
else:
# output plain text (console)
print ('%-16s %-20s %-10s %-20s %s' % ('ip', 'mac', 'intf', 'hostname', 'manufacturer'))
for record in result:
print ('%(ip)-16s %(mac)-20s %(intf)-10s %(hostname)-20s %(manufacturer)s' % record)