This patch fixes a bug in net80211/ieee80211_wireless.c preventing 
the user from setting a certain BSSID by 
"iwconfig athX ap XX:XX:XX:XX:XX:XX". 
It furthermore prevents merging to another IBSS in ad-hoc mode 
if a BSSID was set previously by the above command.
It was tested with the snapshot madwifi-ng-r1696-20060730.

Signed-off-by: Joerg Albert <jal2@gmx.de>

diff -ru madwifi-ng-r1696-20060730/ath/if_ath.c madwifi-ng-r1696-20060730.work/ath/if_ath.c
--- madwifi-ng-r1696-20060730/ath/if_ath.c	2006-07-08 08:47:19.000000000 +0200
+++ madwifi-ng-r1696-20060730.work/ath/if_ath.c	2006-08-03 20:38:12.000000000 +0200
@@ -5316,7 +5316,10 @@
 			 * ath_newstate as the state machine will go from
 			 * RUN -> RUN when this happens.
 			 */
-			if (le64_to_cpu(ni->ni_tstamp.tsf) >= tsf) {
+			/* jal: added: don't merge if we have a desired
+			   BSSID */
+			if (!(vap->iv_flags & IEEE80211_F_DESBSSID) &&
+				le64_to_cpu(ni->ni_tstamp.tsf) >= tsf) {
 				DPRINTF(sc, ATH_DEBUG_STATE,
 					"ibss merge, rstamp %u tsf %llu "
 					"tstamp %llu\n", rstamp, (long long) tsf,
diff -ru madwifi-ng-r1696-20060730/net80211/ieee80211_wireless.c madwifi-ng-r1696-20060730.work/net80211/ieee80211_wireless.c
--- madwifi-ng-r1696-20060730/net80211/ieee80211_wireless.c	2006-07-29 03:31:11.000000000 +0200
+++ madwifi-ng-r1696-20060730.work/net80211/ieee80211_wireless.c	2006-08-03 21:23:30.000000000 +0200
@@ -539,7 +539,7 @@
 	 *
 	 * anything else specifies a particular AP.
 	 */
-	if (IEEE80211_ADDR_EQ(vap->iv_des_bssid, zero_bssid)) 
+	if (IEEE80211_ADDR_EQ(&ap_addr->sa_data, zero_bssid)) 
 		vap->iv_flags &= ~IEEE80211_F_DESBSSID;
 	else {
 		IEEE80211_ADDR_COPY(vap->iv_des_bssid, &ap_addr->sa_data);