tree 6350c77123763ee5e46c848d04a31665fe5d03a2
parent 88b56ad3962dcb75f4cff6d019b2882176b8f74f
author Dan Shi <dshi@google.com> 1460158766 -0700
committer chrome-bot <chrome-bot@chromium.org> 1460205998 -0700

[autotest] Make get_wireless_ssid return the most strict match

There could be a change that multiple ssid config matches the subnet setting.
For example, for config:
wireless_ssid_1.2.3.0/24: ssid1
wireless_ssid_1.2.3.4/32: ssid2

Host with IP 1.2.3.4 matches both of the subnets. However, subnet
1.2.3.4/32 is more restrictive than 1.2.3.0/24. The method should return ssid2,
rather than ssid1.

BUG=None
TEST=unittest

Change-Id: Ie5ebfaeec4c177c29284c216bc35bfc7584fb073
Reviewed-on: https://chromium-review.googlesource.com/338032
Commit-Ready: Dan Shi <dshi@google.com>
Tested-by: Dan Shi <dshi@google.com>
Reviewed-by: Ralph Nathan <ralphnathan@chromium.org>