Support WPA in IBSS mode

Add 'wpa_supplicant_ibss.conf' to configure the IBSS network.
Add a check for the existence of the bssid parameter in
'vwifi_join_ibss' to support the system-generated BSSID.
Modify 'vw3' and 'vw4' in the test script 'verify.sh' to
enter 'ibss1' using WPA.

Author: jychen0611

scripts/verify.sh

@@ -160,21 +160,19 @@ if [ $final_ret -eq 0 ]; then
         final_ret=7
     fi
 
-    # vw3 becomes an IBSS and then joins the "ibss1" network (BSSID: 00:76:77:33:00:00).
+    # vw3 becomes an IBSS and then joins the "ibss1" network.
     echo 
-    echo "=================================="
-    echo "vw3 join ibss1 (00:76:77:33:00:00)"
-    echo "=================================="
-    sudo ip netns exec ns3 iw dev vw3 set type ibss
-    sudo ip netns exec ns3 iw dev vw3 ibss join ibss1 2412 NOHT fixed-freq 00:76:77:33:00:00 beacon-interval 200
+    echo "=============="
+    echo "vw3 join ibss1"
+    echo "=============="
+    sudo ip netns exec ns3 wpa_supplicant -i vw3 -B -c scripts/wpa_supplicant_ibss.conf
 
-    # vw4 becomes an IBSS and then joins the "ibss1" network (BSSID: 00:76:77:33:00:00).
+    # vw4 becomes an IBSS and then joins the "ibss1" network.
     echo 
-    echo "=================================="
-    echo "vw4 join ibss1 (00:76:77:33:00:00)"
-    echo "=================================="
-    sudo ip netns exec ns4 iw dev vw4 set type ibss
-    sudo ip netns exec ns4 iw dev vw4 ibss join ibss1 2412 NOHT fixed-freq 00:76:77:33:00:00 beacon-interval 200
+    echo "=============="
+    echo "vw4 join ibss1"
+    echo "=============="
+    sudo ip netns exec ns4 wpa_supplicant -i vw4 -B -c scripts/wpa_supplicant_ibss.conf
 
     # vw5 becomes an IBSS and then joins the "ibss2" network (BSSID: 00:76:77:35:00:00).
     echo 

scripts/wpa_supplicant_ibss.conf

@@ -0,0 +1,10 @@
+network={
+    ssid="ibss1"
+    mode=1
+    frequency=2412
+    key_mgmt=WPA-PSK
+    proto=RSN
+    pairwise=CCMP
+    group=CCMP
+    psk="12345678"
+}

vwifi.c

@@ -2074,7 +2074,8 @@ static int vwifi_join_ibss(struct wiphy *wiphy,
         return -ERESTARTSYS;
     /* Retrieve IBSS configuration parameters */
     memcpy(vif->ssid, params->ssid, params->ssid_len);
-    memcpy(vif->bssid, params->bssid, ETH_ALEN);
+    if (params->bssid)
+        memcpy(vif->bssid, params->bssid, ETH_ALEN);
     vif->ibss_chandef = params->chandef;
     vif->ssid_len = params->ssid_len;
     vif->beacon_ie_len = params->ie_len;