Align with recent cfg80211 header

Starting from kernel version 6.7, several significant
changes have been made to the cfg80211 subsystem.
1.
The scan_width field is no longer present in the
cfg80211_inform_bss structure.
There really isn't any support for scanning at different
channel widths than 20 MHz since there's no way to set it.
2.
The parameters in the change_beacon function have been
updated to cfg80211_ap_update.
The change_beacon function now includes two additional
parameters, fils_discovery and unsol_bcast_probe_resp,
which arepart of the cfg80211_ap_update structure.

Author: jychen0611

vwifi.c

@@ -454,7 +454,9 @@ static void inform_bss(struct vwifi_vif *vif)
         struct cfg80211_inform_bss data = {
             /* the only channel */
             .chan = &ap->wdev.wiphy->bands[NL80211_BAND_2GHZ]->channels[0],
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
             .scan_width = NL80211_BSS_CHAN_WIDTH_20,
+#endif
             .signal = DBM_TO_MBM(rand_int_smooth(-100, -30, jiffies)),
         };
         int capability = WLAN_CAPABILITY_ESS;
@@ -529,7 +531,7 @@ static enum hrtimer_restart vwifi_beacon(struct hrtimer *timer)
         .boottime_ns = ktime_get_boottime_ns(),
         .chan = vif->channel,
     };
-
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
     switch (vif->bw) {
     case NL80211_CHAN_WIDTH_5:
         bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_5;
@@ -541,7 +543,7 @@ static enum hrtimer_restart vwifi_beacon(struct hrtimer *timer)
         bss_meta.scan_width = NL80211_BSS_CHAN_WIDTH_20;
         break;
     }
-
+#endif
     int capability = WLAN_CAPABILITY_ESS;
 
     if (vif->privacy)
@@ -1577,7 +1579,7 @@ static int vwifi_stop_ap(struct wiphy *wiphy, struct net_device *ndev)
 
     return 0;
 }
-
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
 static int vwifi_change_beacon(struct wiphy *wiphy,
                                struct net_device *ndev,
                                struct cfg80211_beacon_data *info)
@@ -1611,7 +1613,41 @@ static int vwifi_change_beacon(struct wiphy *wiphy,
 
     return 0;
 }
+#else
+static int vwifi_change_beacon(struct wiphy *wiphy,
+                               struct net_device *ndev,
+                               struct cfg80211_ap_update *info)
+{
+    struct vwifi_vif *vif = ndev_get_vwifi_vif(ndev);
+    int ie_offset = DOT11_MGMT_HDR_LEN + DOT11_BCN_PRB_FIXED_LEN;
+    int head_ie_len, tail_ie_len;
+
+    /* cfg80211 and some user-space programs treat IEs as two-part:
+     * 1. head: 802.11 beacon frame header + beacon IEs before TIM IE
+     * 2. tail: beacon IEs after TIM IE
+     * We combine them and store them in vif->beacon_ie.
+     */
+    head_ie_len = info->beacon.head_len - ie_offset;
+    tail_ie_len = info->beacon.tail_len;
 
+    if (likely(head_ie_len + tail_ie_len <= IE_MAX_LEN)) {
+        vif->beacon_ie_len = head_ie_len + tail_ie_len;
+        memset(vif->beacon_ie, 0, IE_MAX_LEN);
+        memcpy(vif->beacon_ie, &info->beacon.head[ie_offset], head_ie_len);
+        memcpy(vif->beacon_ie + head_ie_len, info->beacon.tail, tail_ie_len);
+
+        pr_info(
+            "%s: head_ie_len (before TIM IE) = %d, tail_ie_len = "
+            "%d",
+            __func__, head_ie_len, tail_ie_len);
+    } else {
+        pr_info("%s: IE exceed %d bytes!\n", __func__, IE_MAX_LEN);
+        return 1;
+    }
+
+    return 0;
+}
+#endif
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
 static int vwifi_add_key(struct wiphy *wiphy,
                          struct net_device *ndev,
@@ -2550,7 +2586,9 @@ static void vwifi_virtio_mgmt_rx_scan_response(
     };
     struct cfg80211_inform_bss data = {
         .chan = &rx_channel,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
         .scan_width = NL80211_BSS_CHAN_WIDTH_20,
+#endif
         .signal = DBM_TO_MBM(rand_int_smooth(-100, -30, jiffies)),
     };