wlan-ap-Telecominfraproject/feeds/qca/hostapd/patches/q003-001-hostapd-Add-config-to-truncate-ext-capabilities.patch

From 234aa775f8046dc823a0ce72267f62045d81ee08 Mon Sep 17 00:00:00 2001
From: Harshitha Prem <quic_hprem@quicinc.com>
Date: Wed, 6 Jul 2022 17:03:52 +0530
Subject: [PATCH] hostapd: Add config to truncate ext capabilities

Certain legacy clients are not able to scan 11ax vaps due to
extended capabilities which are more than 8bytes in length.
Hence added a work around to trucate the ext caps to 8bytes
based on the hostapd config ext_cap_len.
Legacy clients are able to scan and connect if hostapd config
as ext_cap_len=8, ieee80211ac=1, ieee80211ax=0

Signed-off-by: Harshitha Prem <quic_hprem@quicinc.com>
---
 hostapd/config_file.c      | 2 ++
 src/ap/ap_config.h         | 1 +
 src/ap/ieee802_11_shared.c | 3 +++
 3 files changed, 6 insertions(+)

diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index ea44ce0..a6334b1 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -2371,6 +2371,8 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 		conf->country[2] = strtol(pos, NULL, 16);
 	} else if (os_strcmp(buf, "ieee80211d") == 0) {
 		conf->ieee80211d = atoi(pos);
+	 } else if (os_strcmp(buf, "ext_cap_len") == 0) {
+		 conf->ext_cap_len = atoi(pos);
 	} else if (os_strcmp(buf, "ieee80211h") == 0) {
 		conf->ieee80211h = atoi(pos);
         } else if (os_strcmp(buf, "dfs_test_mode") == 0) {
diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
index 1f083c4..4e7108a 100644
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -1104,6 +1104,7 @@ struct hostapd_config {
 	/* Use driver-generated interface addresses when adding multiple BSSs */
 	u8 use_driver_iface_addr;
 	u8 skip_unii1_dfs_switch;
+	u8 ext_cap_len;
 
 #ifdef CONFIG_FST
 	struct fst_iface_cfg fst_cfg;
diff --git a/src/ap/ieee802_11_shared.c b/src/ap/ieee802_11_shared.c
index 8d6b89d..ff68256 100644
--- a/src/ap/ieee802_11_shared.c
+++ b/src/ap/ieee802_11_shared.c
@@ -465,6 +465,9 @@ u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid,
 	if (len < hapd->iface->extended_capa_len)
 		len = hapd->iface->extended_capa_len;
 
+	 if (hapd->iconf->ext_cap_len > 0 && hapd->iconf->ext_cap_len < len)
+		 len = hapd->iconf->ext_cap_len;
+
 	*pos++ = WLAN_EID_EXT_CAPAB;
 	*pos++ = len;
 	for (i = 0; i < len; i++, pos++) {