#!/bin/sh
#
# "ANI-thing is better than no WiFi"-Workaround
#
# In order to avoid further WiFi-Blackouts that *might* be caused by a buggy
# ANI feature in the ath9k kernel module, we disable ANI for nodes using the
# "stable" firmware branch until it got fixed in OpenWRT completely.

# Don't need to do anything, unless the script gets triggered by an "ifup"
# event.
[[ "$ACTION" != "ifup" ]] && exit 0;
[[ "$INTERFACE" != "mesh_radio0" && "$INTERFACE" != "client" ]] && exit 0;

# Test whether disabling ANI is applicable or not
if [ ! -e "/sys/kernel/debug/ieee80211/phy0/ath9k/ani" ] ; then
	logger -s -t ath9k-disable-ani -p local0.notice \
		"Not an ath9k device with ANI. Aborting."
	exit 0
fi

# Load helper functions and determine the current branch
. /lib/functions.sh

config_load autoupdater

# Test whether this devices has the stable or the testing firmware
config_get fw_branch "settings" "branch"

new_ani_state=1
log_msg="Current firmware branch is: ${fw_branch}"
if [ "$fw_branch" == "stable" ] ; then
	new_ani_state=0
	log_msg="${log_msg} (disabling ANI)"
else
	log_msg="${log_msg} (enabling ANI)"
fi

# enable/disable feature
logger -s -t ath9k-disable-ani -p local0.info $log_msg
/bin/echo ${new_ani_state} > /sys/kernel/debug/ieee80211/phy0/ath9k/ani