Public bug reported:
The comparison used in provisioningserver/utils/__init__.py:
find_ip_via_arp(mac) compares MAC addresses to the output of an "arp -n"
command using case sensitive comparison. This MAC address may be entered
by a user in a web UI and often is NOT cut/pasted from ARP but rather
from the IPMI vendor's display, which may display the MAC address in
uppercase.
For a fix, I strongly recommend doing these things to make this more
friendly:
1. Trim all whitespace from the supplied MAC address before comparison.
2. Trim all delimiters too - both on the supplied MAC address and from
the output column of the "arp -n" it's being compared with.
3. Translate both the supplied MAC address and the "arp -n" column data
to lowercase or uppercase for comparison or use a case-insensitive match
in the "for" loop.
- DIFF -
diff /usr/lib/python2.7/dist-packages/provisioningserver/utils/__init__.py
__init__.py
46a47
> import re
824a826,827
> mac = mac.lower()
> mac = re.sub('[^0-9a-f]', '', mac)
829c832,833
< if len(columns) == 5 and columns[2] == mac:
---
> col = re.sub('[^0-9a-f]', '', columns[2])
> if len(columns) == 5 and col == mac:
** Affects: maas (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1367455
Title:
MAC address for node's IPMI is reversed looked up to yield IP address
using case sensitive comparison
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