From: Michael Tremer <michael.tremer@ipfire.org>
Date: Mon, 18 Mar 2019 19:50:44 +0000 (+0100)
Subject: wireless-ap: Add CLI to set channel bandwidth
X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fnetwork.git;a=commitdiff_plain;h=54094fc7ae1bc17e8d8361f7758d9404f1eeff02

wireless-ap: Add CLI to set channel bandwidth

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/functions/functions.wireless b/src/functions/functions.wireless
index 221866ec..0437d27b 100644
--- a/src/functions/functions.wireless
+++ b/src/functions/functions.wireless
@@ -29,6 +29,14 @@ WIRELESS_DEFAULT_ENCRYPTION_MODE="NONE"
 WIRELESS_VALID_ENCRYPTION_MODES="WPA2-PSK-SHA256 WPA2-PSK \
 	WPA-PSK-SHA256 WPA-PSK NONE"
 
+declare -A WIRELESS_CHANNEL_BANDWIDTHS=(
+	["802.11ac"]="20 40 80 160 80+80"
+	["802.11a/n"]="20 40"
+	["802.11a"]="20 40"
+	["802.11g/n"]="20 40"
+	["802.11g"]="20 40"
+)
+
 cli_wireless() {
 	local action=${1}
 	shift 1
@@ -309,6 +317,18 @@ wireless_channel_is_valid() {
 	return ${EXIT_FALSE}
 }
 
+wireless_channel_bandwidth_is_valid() {
+	local mode="${1}"
+	assert isset mode
+
+	local bandwidth="${2}"
+	assert isset bandwidth
+
+	local bandwidths="${WIRELESS_CHANNEL_BANDWIDTHS["${mode}"]}"
+
+	list_match "${bandwidth}" ${bandwidths}
+}
+
 wireless_channel_is_ht40_plus() {
 	local channel="${1}"
 	assert isinteger channel
diff --git a/src/hooks/ports/wireless-ap b/src/hooks/ports/wireless-ap
index 49c0a843..8b626bf3 100644
--- a/src/hooks/ports/wireless-ap
+++ b/src/hooks/ports/wireless-ap
@@ -29,6 +29,7 @@ HOOK_SETTINGS="${HOOK_SETTINGS} ENCRYPTION KEY"
 ADDRESS=$(mac_generate)
 BROADCAST_SSID=on
 CHANNEL=0
+CHANNEL_BANDWIDTH=
 ENCRYPTION=""
 KEY=""
 SSID=
@@ -67,6 +68,9 @@ hook_parse_cmdline() {
 			--channel=*)
 				CHANNEL=$(cli_get_val "${1}")
 				;;
+			--channel-bandwidth=*)
+				CHANNEL_BANDWIDTH="$(cli_get_val "${1}")"
+				;;
 			--dfs=*)
 				DFS="$(cli_get_val "${1}")"
 
@@ -121,6 +125,12 @@ hook_parse_cmdline() {
 		return ${EXIT_ERROR}
 	fi
 
+	# Channel bandwidth must match the mode
+	if isset CHANNEL_BANDWIDTH && ! wireless_channel_bandwidth_is_valid "${MODE}" "${CHANNEL_BANDWIDTH}"; then
+		error "Channel Bandwidth '${CHANNEL_BANDWIDTH}' is not supported"
+		return ${EXIT_ERROR}
+	fi
+
 	# Save address of phy do identify it again
 	PHY=$(phy_get ${PHY})
 	PHY=$(phy_get_address ${PHY})