tree 3027cf31e42f3f4fe95bb25f4700b12014802dc5
parent 1b016e53e01a38ed5a854e5a391f67e1be928f5a
author Paul Stewart <pstew@chromium.org> 1354067183 -0800
committer Gerrit <chrome-bot@google.com> 1354233951 -0800

autotest: WiFi: Enable multi-ssid on CrOS-based routers

Enable the "multi_interface" step config option to work correctly
on a ChromeOS based router/server.  This required a few changes:

 - Allow multiple DHCP server instances to run in parallel on
   CrOS routers.  Do this by looking up the interface in the
   local_server list to see which interface parameters to apply
   to the configuration.
 - Move code for stopping all DHCP servers to the initialization
   and final teardown, instead of during server startup.
 - Keep track of each hostapd instance created so the logs for
   each can be retrieved separately and each can be released
   when de-configuring hostapd.
 - Use the (already available) "ap" parameter in client_ping
   commands that are meant to address the secondary server,
   since in "local_server" configurations the server IP address
   is different for each AP.

BUG=chromium-os:36669
TEST=network_WiFiManager/040MutiAuth

Change-Id: I88e016086e0b8755bb9290ec964ee63d952acec1
Reviewed-on: https://gerrit.chromium.org/gerrit/38834
Reviewed-by: mukesh agrawal <quiche@chromium.org>
Commit-Ready: Paul Stewart <pstew@chromium.org>
Tested-by: Paul Stewart <pstew@chromium.org>