Add BSSID assignment under WPA setting

Search the IBSS list for a network with matching WPA settings
(compare the SSID and the frequency band). If found, use its
BSSID. If not, use the device's MAC address as the BSSID.

Author: jychen0611

vwifi.c

@@ -2074,12 +2074,26 @@ static int vwifi_join_ibss(struct wiphy *wiphy,
         return -ERESTARTSYS;
     /* Retrieve IBSS configuration parameters */
     memcpy(vif->ssid, params->ssid, params->ssid_len);
+    vif->ibss_chandef = params->chandef;
+    vif->ssid_len = params->ssid_len;
     /* When the BSSID is automatically generated by the system, it will not be
      * passed as a parameter to the join function. */
     if (params->bssid)
         memcpy(vif->bssid, params->bssid, ETH_ALEN);
-    vif->ibss_chandef = params->chandef;
-    vif->ssid_len = params->ssid_len;
+    else {
+        /* Search for IBSS networks with WPA settings in the IBSS list. If a
+         * matching network exists, join it. Otherwise, create one. */
+        memcpy(vif->bssid, ndev->dev_addr, ETH_ALEN);
+        struct vwifi_vif *ibss_vif = NULL;
+        list_for_each_entry (ibss_vif, &vwifi->ibss_list, ibss_list) {
+            if (!memcmp(ibss_vif->ssid, vif->ssid, vif->ssid_len) &&
+                ibss_vif->ibss_chandef.center_freq1 ==
+                    vif->ibss_chandef.center_freq1) {
+                memcpy(vif->bssid, ibss_vif->bssid, ETH_ALEN);
+                break;
+            }
+        }
+    }
     vif->beacon_ie_len = params->ie_len;
     memcpy(vif->beacon_ie, params->ie, params->ie_len);
     vif->ibss_beacon_int = params->beacon_interval;