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Sample script for mac to ipv6 translation

Useful for some generic applications where nodediscover
does not have full support, but must be used with care
as it doesn't guarantee the mac address is what we expect
it to be.
This commit is contained in:
Jarrod Johnson 2018-05-17 15:35:52 -04:00
parent 39e9bf0be5
commit db1ae03415

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#!/usr/bin/env python
# This is a sample python script for going through all observed mac addresses
# and assuming they are BMC related and printing nodeattrib commands
# for each node to access the bmc using the interface specified on the command
# line
# Not necessarily as useful if there may be mistakes in the
# net.switch/net.switchport attributes, but a handy utility in a pinch when
# you really know
import confluent.client as cl
import socket
import struct
c = cl.Command()
macs = []
interface = sys.argv[1]
for mac in c.read('/networking/macs/by-mac/'):
macs.append(mac['item']['href'])
for mac in macs:
macinfo = list(c.read('/networking/macs/by-mac/{0}'.format(mac)))[0]
if 'possiblenode' in macinfo and macinfo['possiblenode']:
if macinfo['macsonport'] > 1:
print('Ambiguous set of macs on port for ' + macinfo[
'possiblenode'])
prefix = int(mac.replace('-', '')[:6], 16) ^ 0b100000000000000000
prefix = prefix << 8
prefix |= 0xff
suffix = int(mac.replace('-', '')[6:], 16)
suffix |= 0xfe000000
rawn = struct.pack('!QLL', 0xfe80000000000000, prefix, suffix)
bmc = socket.inet_ntop(socket.AF_INET6, rawn)
print('nodeattrib {0} bmc={1}%{2}'.format(macinfo['possiblenode'],
bmc, interface))