[openwrt/openwrt] hostapd: automatically calculate channel center freq on chan_switch

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/46e0eeb760c9d1da38660f9a02119a558d403625

commit 46e0eeb760c9d1da38660f9a02119a558d403625
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Mon Feb 7 13:11:01 2022 +0100

    hostapd: automatically calculate channel center freq on chan_switch
    
    Simplifies switching to different channels when on >= VHT80
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/network/services/hostapd/src/src/ap/ubus.c | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/package/network/services/hostapd/src/src/ap/ubus.c b/package/network/services/hostapd/src/src/ap/ubus.c
index 3c016124f9..5855b25794 100644
--- a/package/network/services/hostapd/src/src/ap/ubus.c
+++ b/package/network/services/hostapd/src/src/ap/ubus.c
@@ -11,6 +11,7 @@
 #include "utils/eloop.h"
 #include "utils/wpabuf.h"
 #include "common/ieee802_11_defs.h"
+#include "common/hw_features_common.h"
 #include "hostapd.h"
 #include "neighbor_db.h"
 #include "wps_hostapd.h"
@@ -22,6 +23,7 @@
 #include "wnm_ap.h"
 #include "taxonomy.h"
 #include "airtime_policy.h"
+#include "hw_features.h"
 
 static struct ubus_context *ctx;
 static struct blob_buf b;
@@ -801,6 +803,7 @@ hostapd_switch_chan(struct ubus_context *ctx, struct ubus_object *obj,
 	struct hostapd_data *hapd = get_hapd_from_object(obj);
 	struct hostapd_config *iconf = hapd->iface->conf;
 	struct hostapd_freq_params *freq_params;
+	struct hostapd_hw_modes *mode = hapd->iface->current_mode;
 	struct csa_settings css = {
 		.freq_params = {
 			.ht_enabled = iconf->ieee80211n,
@@ -809,6 +812,8 @@ hostapd_switch_chan(struct ubus_context *ctx, struct ubus_object *obj,
 			.sec_channel_offset = iconf->secondary_channel,
 		}
 	};
+	u8 chwidth = hostapd_get_oper_chwidth(iconf);
+	u8 seg0 = 0, seg1 = 0;
 	int ret = UBUS_STATUS_OK;
 	int i;
 
@@ -850,6 +855,35 @@ hostapd_switch_chan(struct ubus_context *ctx, struct ubus_object *obj,
 	SET_CSA_SETTING(CSA_HE, freq_params.he_enabled, bool);
 	SET_CSA_SETTING(CSA_BLOCK_TX, block_tx, bool);
 
+	css.freq_params.channel = hostapd_hw_get_channel(hapd, css.freq_params.freq);
+	if (!css.freq_params.channel)
+		return UBUS_STATUS_NOT_SUPPORTED;
+
+	switch (css.freq_params.bandwidth) {
+	case 160:
+		chwidth = CHANWIDTH_160MHZ;
+		break;
+	case 80:
+		chwidth = css.freq_params.center_freq2 ? CHANWIDTH_80P80MHZ : CHANWIDTH_80MHZ;
+		break;
+	default:
+		chwidth = CHANWIDTH_USE_HT;
+		break;
+	}
+
+	hostapd_set_freq_params(&css.freq_params, iconf->hw_mode,
+				css.freq_params.freq,
+				css.freq_params.channel, iconf->enable_edmg,
+				iconf->edmg_channel,
+				css.freq_params.ht_enabled,
+				css.freq_params.vht_enabled,
+				css.freq_params.he_enabled,
+				css.freq_params.sec_channel_offset,
+				chwidth, seg0, seg1,
+				iconf->vht_capab,
+				mode ? &mode->he_capab[IEEE80211_MODE_AP] :
+				NULL);
+
 	for (i = 0; i < hapd->iface->num_bss; i++) {
 		struct hostapd_data *bss = hapd->iface->bss[i];