BSD: Use correct ifindex from route messages

Use the interface index from the correct structure according to the
message instead of assuming rtm_index is correct.

Signed-off-by: Roy Marples <roy@marples.name>

src/drivers/driver_bsd.c

@@ -773,12 +773,12 @@ bsd_wireless_event_receive(int sock, void *ctx, void *sock_ctx)
 			   rtm->rtm_version);
 		return;
 	}
-	drv = bsd_get_drvindex(global, rtm->rtm_index);
-	if (drv == NULL)
-		return;
 	switch (rtm->rtm_type) {
 	case RTM_IEEE80211:
 		ifan = (struct if_announcemsghdr *) rtm;
+		drv = bsd_get_drvindex(global, ifan->ifan_index);
+		if (drv == NULL)
+			return;
 		switch (ifan->ifan_what) {
 		case RTM_IEEE80211_ASSOC:
 		case RTM_IEEE80211_REASSOC:
@@ -1189,6 +1189,7 @@ wpa_driver_bsd_event_receive(int sock, void *ctx, void *sock_ctx)
 	struct bsd_driver_global *global = sock_ctx;
 	struct bsd_driver_data *drv;
 	struct if_announcemsghdr *ifan;
+	struct if_msghdr *ifm;
 	struct rt_msghdr *rtm;
 	union wpa_event_data event;
 	struct ieee80211_michael_event *mic;
@@ -1210,14 +1211,13 @@ wpa_driver_bsd_event_receive(int sock, void *ctx, void *sock_ctx)
 			   rtm->rtm_version);
 		return;
 	}
-	drv = bsd_get_drvindex(global, rtm->rtm_index);
-	if (drv == NULL)
-		return;
-	ctx = drv->ctx;
 	os_memset(&event, 0, sizeof(event));
 	switch (rtm->rtm_type) {
 	case RTM_IFANNOUNCE:
 		ifan = (struct if_announcemsghdr *) rtm;
+		drv = bsd_get_drvindex(global, ifan->ifan_index);
+		if (drv == NULL)
+			return;
 		os_strlcpy(event.interface_status.ifname, drv->ifname,
 			   sizeof(event.interface_status.ifname));
 		switch (ifan->ifan_what) {
@@ -1230,37 +1230,41 @@ wpa_driver_bsd_event_receive(int sock, void *ctx, void *sock_ctx)
 			   event.interface_status.ifname,
 			   ifan->ifan_what == IFAN_DEPARTURE ?
 				"removed" : "added");
-		wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
+		wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 		break;
 	case RTM_IEEE80211:
 		ifan = (struct if_announcemsghdr *) rtm;
+		drv = bsd_get_drvindex(global, ifan->ifan_index);
+		if (drv == NULL)
+			return;
 		switch (ifan->ifan_what) {
 		case RTM_IEEE80211_ASSOC:
 		case RTM_IEEE80211_REASSOC:
 			if (drv->is_ap)
 				break;
-			wpa_supplicant_event(ctx, EVENT_ASSOC, NULL);
+			wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 			break;
 		case RTM_IEEE80211_DISASSOC:
 			if (drv->is_ap)
 				break;
-			wpa_supplicant_event(ctx, EVENT_DISASSOC, NULL);
+			wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 			break;
 		case RTM_IEEE80211_SCAN:
 			if (drv->is_ap)
 				break;
-			wpa_supplicant_event(ctx, EVENT_SCAN_RESULTS, NULL);
+			wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS,
+					     NULL);
 			break;
 		case RTM_IEEE80211_LEAVE:
 			leave = (struct ieee80211_leave_event *) &ifan[1];
-			drv_event_disassoc(ctx, leave->iev_addr);
+			drv_event_disassoc(drv->ctx, leave->iev_addr);
 			break;
 		case RTM_IEEE80211_JOIN:
 #ifdef RTM_IEEE80211_REJOIN
 		case RTM_IEEE80211_REJOIN:
 #endif
 			join = (struct ieee80211_join_event *) &ifan[1];
-			bsd_new_sta(drv, ctx, join->iev_addr);
+			bsd_new_sta(drv, drv->ctx, join->iev_addr);
 			break;
 		case RTM_IEEE80211_REPLAY:
 			/* ignore */
@@ -1275,19 +1279,24 @@ wpa_driver_bsd_event_receive(int sock, void *ctx, void *sock_ctx)
 			os_memset(&event, 0, sizeof(event));
 			event.michael_mic_failure.unicast =
 				!IEEE80211_IS_MULTICAST(mic->iev_dst);
-			wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE,
-				&event);
+			wpa_supplicant_event(drv->ctx,
+					     EVENT_MICHAEL_MIC_FAILURE, &event);
 			break;
 		}
 		break;
 	case RTM_IFINFO:
+		ifm = (struct if_msghdr *) rtm;
+		drv = bsd_get_drvindex(global, ifm->ifm_index);
+		if (drv == NULL)
+			return;
 		if ((rtm->rtm_flags & RTF_UP) == 0) {
 			os_strlcpy(event.interface_status.ifname, drv->ifname,
 				   sizeof(event.interface_status.ifname));
 			event.interface_status.ievent = EVENT_INTERFACE_REMOVED;
 			wpa_printf(MSG_DEBUG, "RTM_IFINFO: Interface '%s' DOWN",
 				   event.interface_status.ifname);
-			wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
+			wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS,
+					     &event);
 		}
 		break;
 	}