hostapd: update mesh DFS patches and add mesh HE support

Drop outdated and by now broken patchset originally supplied by
Peter Oh in August 2018 but never merged upstream.
Instead add the more promissing rework recently submitted by
Markus Theil who picked up Peter's patchset, fixed and completed it
and added support for HE (802.11ax) in mesh mode.

This is only compile tested and needs some real-life testing.

Fixes: FS#3214
Fixes: 167028b750 ("hostapd: Update to version 2.9 (2019-08-08)")
Fixes: 0a3ec87a66 ("hostapd: update to latest Git hostap_2_9-1238-gdd2daf0848ed")
Fixes: 017320ead3 ("hostapd: bring back mesh patches")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 102 insertions, 0 deletions

diff --git a/package/network/services/hostapd/patches/003-wpa_supplicant-handle-HT40-and-mode-downgrade-in-AP-.patch b/package/network/services/hostapd/patches/003-wpa_supplicant-handle-HT40-and-mode-downgrade-in-AP-.patch
new file mode 100644
index 0000000000..f42620042d
--- /dev/null
+++ b/package/network/services/hostapd/patches/003-wpa_supplicant-handle-HT40-and-mode-downgrade-in-AP-.patch
@@ -0,0 +1,102 @@
+From 978a59514ccde994b5c06e1cbb49cc8cebe6381c Mon Sep 17 00:00:00 2001
+From: Markus Theil <markus.theil@tu-ilmenau.de>
+Date: Tue, 30 Jun 2020 13:53:19 +0200
+Subject: [PATCH 03/19] wpa_supplicant: handle HT40 and mode downgrade in AP
+ mode
+
+This patch adds some missing pieces to the interface configuration
+of AP/mesh mode in wpa_supplicant.
+ - check for secondary channel and HT40 capability
+ - try to downgrade to 11b if 11g is not available
+Especially with the HT40 check, this code now performs all settings,
+which the deleted/duplicated mesh code did.
+
+Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
+---
+ wpa_supplicant/ap.c | 49 ++++++++++++++++++++++++++++++++++++---------
+ 1 file changed, 40 insertions(+), 9 deletions(-)
+
+--- a/wpa_supplicant/ap.c
++++ b/wpa_supplicant/ap.c
+@@ -134,6 +134,23 @@ no_vht:
+ }
+ 
+ 
++static struct hostapd_hw_modes *wpa_supplicant_find_hw_mode(struct wpa_supplicant *wpa_s,
++							    enum hostapd_hw_mode hw_mode)
++{
++	struct hostapd_hw_modes *mode = NULL;
++	int i;
++
++	for (i = 0; i < wpa_s->hw.num_modes; i++) {
++		if (wpa_s->hw.modes[i].mode == hw_mode) {
++			mode = &wpa_s->hw.modes[i];
++			break;
++		}
++	}
++
++	return mode;
++}
++
++
+ int wpa_supplicant_conf_ap_ht(struct wpa_supplicant *wpa_s,
+ 			      struct wpa_ssid *ssid,
+ 			      struct hostapd_config *conf)
+@@ -147,9 +164,6 @@ int wpa_supplicant_conf_ap_ht(struct wpa
+ 		return -1;
+ 	}
+ 
+-	/* TODO: enable HT40 if driver supports it;
+-	 * drop to 11b if driver does not support 11g */
+-
+ 	/*
+ 	 * Enable HT20 if the driver supports it, by setting conf->ieee80211n
+ 	 * and a mask of allowed capabilities within conf->ht_capab.
+@@ -158,17 +172,27 @@ int wpa_supplicant_conf_ap_ht(struct wpa
+ 	 */
+ 	if (wpa_s->hw.modes) {
+ 		struct hostapd_hw_modes *mode = NULL;
+-		int i, no_ht = 0;
++		int no_ht = 0;
+ 
+ 		wpa_printf(MSG_DEBUG,
+ 			   "Determining HT/VHT options based on driver capabilities (freq=%u chan=%u)",
+ 			   ssid->frequency, conf->channel);
+ 
+-		for (i = 0; i < wpa_s->hw.num_modes; i++) {
+-			if (wpa_s->hw.modes[i].mode == conf->hw_mode) {
+-				mode = &wpa_s->hw.modes[i];
+-				break;
+-			}
++		mode = wpa_supplicant_find_hw_mode(wpa_s, conf->hw_mode);
++
++		/* may drop drop to 11b if driver does not support 11g */
++		if (!mode && conf->hw_mode == HOSTAPD_MODE_IEEE80211G) {
++			conf->hw_mode = HOSTAPD_MODE_IEEE80211B;
++			wpa_printf(MSG_INFO,
++			   "Try downgrade to IEEE 802.11b as 802.11g is not "
++			   "supported by the current hardware");
++			mode = wpa_supplicant_find_hw_mode(wpa_s, conf->hw_mode);
++		}
++
++		if (!mode) {
++			wpa_printf(MSG_ERROR,
++			   "No match between requested and supported hw modes found");
++			return -1;
+ 		}
+ 
+ #ifdef CONFIG_HT_OVERRIDES
+@@ -193,6 +217,13 @@ int wpa_supplicant_conf_ap_ht(struct wpa
+ 				      HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET),
+ 				   ssid->ht40);
+ 			conf->ieee80211n = 1;
++
++			if (ssid->ht40 &&
++			    mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)
++				conf->secondary_channel = ssid->ht40;
++			else
++				conf->secondary_channel = 0;
++
+ #ifdef CONFIG_P2P
+ 			if (ssid->p2p_group &&
+ 			    conf->hw_mode == HOSTAPD_MODE_IEEE80211A &&