From patchwork Sun Nov 19 17:52:43 2017
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Subject: [1/2] fff-config: Provide options to permanently disable WiFi devices
From: Adrian Schmutzler <freifunk@adrianschmutzler.de>
X-Patchwork-Id: 694
Message-Id: <1511113964-30437-1-git-send-email-freifunk@adrianschmutzler.de>
To: franken-dev@freifunk.net
Date: Sun, 19 Nov 2017 18:52:43 +0100

By specifying wifi.disable24ghz, wifi.disable5ghz or
wifi.disablewifi in /etc/config/fff, one can permanently
(upgrade-safe) disable WiFi devices (e.g. 5 GHz on C25).

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

Tested-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
---
 src/packages/fff/fff-config/Makefile               |  2 +-
 .../files/etc/uci-defaults/98-configure-fff        | 21 +++++++++++++++++++++
 .../fff-wireless/files/lib/functions/fff/wireless  | 22 ++++++++++++++++++++++
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/src/packages/fff/fff-config/Makefile b/src/packages/fff/fff-config/Makefile
index fe4f5df..690719a 100644
--- a/src/packages/fff/fff-config/Makefile
+++ b/src/packages/fff/fff-config/Makefile
@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=fff-config
-PKG_VERSION:=1
+PKG_VERSION:=2
 PKG_RELEASE:=1
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)
diff --git a/src/packages/fff/fff-config/files/etc/uci-defaults/98-configure-fff b/src/packages/fff/fff-config/files/etc/uci-defaults/98-configure-fff
index aa6ac42..02d716c 100644
--- a/src/packages/fff/fff-config/files/etc/uci-defaults/98-configure-fff
+++ b/src/packages/fff/fff-config/files/etc/uci-defaults/98-configure-fff
@@ -28,3 +28,24 @@ poe_passthrough=$(uci -q get "fff.poe_passthrough.active")
 if [ "$poe_passthrough" = "1" ] && [ -s /usr/lib/fff-support/activate_poe_passthrough.sh ] ; then
 	/usr/lib/fff-support/activate_poe_passthrough.sh
 fi
+
+. /lib/functions/fff/wireless
+
+if [ "$(uci -q get 'fff.wifi.disable24ghz')" = "1" ] ; then
+	radio="$(wifiGetPhy "2")"
+	[ -n "$radio" ] && uci -q set "wireless.${radio}.disabled=1"
+fi
+
+if [ "$(uci -q get 'fff.wifi.disable5ghz')" = "1" ] ; then
+	radio="$(wifiGetPhy "5")"
+	[ -n "$radio" ] && uci -q set "wireless.${radio}.disabled=1"
+fi
+
+if [ "$(uci -q get 'fff.wifi.disablewifi')" = "1" ] ; then
+	for phy in $(iw phy | awk '/^Wiphy/{ print $2 }'); do
+		radio="radio$(echo "$phy" | tr -d -C "0-9")"
+		uci -q set "wireless.${radio}.disabled=1"
+	done
+fi
+
+uci -q commit wireless
diff --git a/src/packages/fff/fff-wireless/files/lib/functions/fff/wireless b/src/packages/fff/fff-wireless/files/lib/functions/fff/wireless
index 5b63397..8288703 100644
--- a/src/packages/fff/fff-wireless/files/lib/functions/fff/wireless
+++ b/src/packages/fff/fff-wireless/files/lib/functions/fff/wireless
@@ -228,4 +228,26 @@ wifiAddMesh() {
 	echo "${iface}"
 	return 0
 }
+
+wifiGetPhy() {
+	# Returns the wifi-device (radioX) for a given frequency (2 or 5)
+
+	if [ $# -ne "1" ]
+	then
+		return 1
+	fi
+
+	local freq=$1
+	local radio=""
+
+	for phy in $(iw phy | awk '/^Wiphy/{ print $2 }'); do
+		if iw phy "$phy" info | grep -q -m1 "${freq}... MHz"; then
+			radio="radio$(echo "$phy" | tr -d -C "0-9")"
+		fi
+	done
+	
+	echo "$radio"
+	return 0 # also returns success if outermost if is false
+}
+
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