[PATCH 4/9] hostapd: Add support for the 6 GHz band

[Michael Tremer <michael.tremer@ipfire.org>]

This is mainly adding any center frequencies when the user manually
choses a channel.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 config/hostapd/config            |   4 +-
 src/initscripts/packages/hostapd | 129 ++++++++++++++++++++++++++++---
 2 files changed, 120 insertions(+), 13 deletions(-)

diff --git a/config/hostapd/config b/config/hostapd/config
index 8bf19375b..7bda725a7 100644
--- a/config/hostapd/config
+++ b/config/hostapd/config
@@ -375,9 +375,9 @@ CONFIG_MBO=y
 CONFIG_TAXONOMY=y
 
 # Fast Initial Link Setup (FILS) (IEEE 802.11ai)
-#CONFIG_FILS=y
+CONFIG_FILS=y
 # FILS shared key authentication with PFS
-#CONFIG_FILS_SK_PFS=y
+CONFIG_FILS_SK_PFS=y
 
 # Include internal line edit mode in hostapd_cli. This can be used to provide
 # limited command line editing and history support.
diff --git a/src/initscripts/packages/hostapd b/src/initscripts/packages/hostapd
index 0bd90bda2..c8d3ffce1 100644
--- a/src/initscripts/packages/hostapd
+++ b/src/initscripts/packages/hostapd
@@ -125,6 +125,7 @@ write_config() {
 	local he_phy_flags=0
 	local eht_mac_flags=0
 	local eht_phy_flags=0
+	local channel_offset
 
 	# Set some default BAND if none is set
 	if [ -z "${CONFIG["BAND"]}" ]; then
@@ -332,6 +333,16 @@ write_config() {
 		esac
 	fi
 
+	# Set channel offset
+	case "${CONFIG["BAND"]}" in
+		6g)
+			channel_offset=1
+			;;
+		*)
+			channel_offset=0
+			;;
+	esac
+
 	# Header
 	echo "# Automatically generated configuration"
 	echo "# DO NOT EDIT"
@@ -391,7 +402,7 @@ write_config() {
 
 			# Compute the channel segment index
 			if [ "${CONFIG["CHANNEL"]}" -gt 0 ]; then
-				case "$(( (${CONFIG["CHANNEL"]} / 4) % 2 ))" in
+				case "$(( ((${CONFIG["CHANNEL"]} / 4) + channel_offset) % 2 ))" in
 					0)
 						vht_oper_centr_freq_seg0_idx="$(( ${CONFIG["CHANNEL"]} - 2 ))"
 						;;
@@ -409,7 +420,7 @@ write_config() {
 
 			# Compute the channel segment index
 			if [ "${CONFIG["CHANNEL"]}" -gt 0 ]; then
-				case "$(( (${CONFIG["CHANNEL"]} / 4) % 4 ))" in
+				case "$(( ((${CONFIG["CHANNEL"]} / 4) + channel_offset) % 4 ))" in
 					0)
 						vht_oper_centr_freq_seg0_idx="$(( ${CONFIG["CHANNEL"]} - 6 ))"
 						;;
@@ -433,15 +444,46 @@ write_config() {
 
 			# Compute the channel segment index
 			if [ "${CONFIG["CHANNEL"]}" -gt 0 ]; then
-				case "${CONFIG["CHANNEL"]}" in
-					36|40|44|48|52|56|60|64)
-						vht_oper_centr_freq_seg0_idx=50
-						;;
-					100|104|108|112|116|120|124|128)
-						vht_oper_centr_freq_seg0_idx=114
+				case "${CONFIG["BAND"]}" in
+					# 6 GHz
+					6g)
+						case "${CONFIG["CHANNEL"]}" in
+							1|5|9|13|17|21|25|29)
+								vht_oper_centr_freq_seg0_idx=15
+								;;
+							33|37|41|45|49|53|57|61)
+								vht_oper_centr_freq_seg0_idx=47
+								;;
+							65|69|73|77|81|85|89|93)
+								vht_oper_centr_freq_seg0_idx=79
+								;;
+							97|101|105|109|113|117|121|125)
+								vht_oper_centr_freq_seg0_idx=111
+								;;
+							129|133|137|141|145|149|153|157)
+								vht_oper_centr_freq_seg0_idx=143
+								;;
+							161|165|169|173|177|181|185|189)
+								vht_oper_centr_freq_seg0_idx=175
+								;;
+							193|197|201|205|209|213|217|221)
+								vht_oper_centr_freq_seg0_idx=207
+								;;
+						esac
 						;;
-					149|153|157|161|165|169|173|177)
-						vht_oper_centr_freq_seg0_idx=163
+					# 5 GHz
+					5g)
+						case "${CONFIG["CHANNEL"]}" in
+							36|40|44|48|52|56|60|64)
+								vht_oper_centr_freq_seg0_idx=50
+								;;
+							100|104|108|112|116|120|124|128)
+								vht_oper_centr_freq_seg0_idx=114
+								;;
+							149|153|157|161|165|169|173|177)
+								vht_oper_centr_freq_seg0_idx=163
+								;;
+						esac
 						;;
 				esac
 			fi
@@ -465,6 +507,31 @@ write_config() {
 	local eht_oper_centr_freq_seg0_idx="${he_oper_centr_freq_seg0_idx}"
 
 	case "${CONFIG["MODE"]}" in
+		EHT320)
+			enable_be=1
+			eht_oper_chwidth=9
+
+			# Compute the channel segment index
+			case "${CONFIG["BAND"]}" in
+				6g)
+					case "${CONFIG["CHANNEL"]}" in
+						1|5|9|13|17|21|25|29|33|37|41|45|49|53|57|61)
+							eht_oper_centr_freq_seg0_idx=31
+							;;
+						65|69|73|77|81|85|89|93|97|101|105|109|113|117|121|125)
+							eht_oper_centr_freq_seg0_idx=95
+							;;
+						129|133|137|141|145|149|153|157|161|165|169|173|177|181|185|189)
+							eht_oper_centr_freq_seg0_idx=159
+							;;
+						193|197|201|205|209|213|217|221)
+							eht_oper_centr_freq_seg0_idx=191
+							;;
+					esac
+					;;
+			esac
+			;;
+
 		EHT*)
 			enable_be=1
 			;;
@@ -472,7 +539,7 @@ write_config() {
 
 	# Set hardware mode
 	case "${CONFIG["BAND"]}" in
-		5g)
+		6g|5g)
 			echo "hw_mode=a"
 			;;
 		2g)
@@ -480,6 +547,46 @@ write_config() {
 			;;
 	esac
 
+	# Adjust settings for 6 GHz
+	case "${CONFIG["BAND"]}" in
+		6g)
+			# Disable 802.11ac
+			enable_ac=0
+
+			# Enable 802.11w management frame protection
+			CONFIG["IEEE80211W"]="on"
+
+			# Send FILS Discovery frames every 20 TUs (~20 ms)
+			# for faster AP detection by the clients
+			echo "fils_discovery_min_interval=20"
+			echo "fils_discovery_max_interval=20"
+			;;
+	esac
+
+	local op_class=
+
+	# Configure global operating class
+	case "${CONFIG["BAND"]}" in
+		6g)
+			case "${CONFIG["MODE"]}" in
+				EHT320)
+					op_class=137
+					;;
+				HE20|EHT20)
+					op_class=131
+					;;
+				HE*|EHT*)
+					op_class="$(( 132 + vht_oper_chwidth ))"
+					;;
+			esac
+			;;
+	esac
+
+	# Set global operating class
+	if [ -n "${op_class}" ]; then
+		echo "op_class=${op_class}"
+	fi
+
 	# Enable 802.11be?
 	if [ "${enable_be}" -eq 1 ]; then
 		echo "ieee80211be=1"
-- 
2.47.3