FT: Do not deliver RRB messages locally without matching FT/SSID

For FT protocol to work, the BSSs need to be operating an FT AKM with
the same SSID and mobility domain. The previous commit covered the
mobility domain, this covers the other prerequisites. This reduces
unnecessary load from having to allocate queued messages for interfaces
that cannot have valid data.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/ap/wpa_auth_glue.c

@@ -718,20 +718,26 @@ static int hostapd_wpa_auth_oui_iter(struct hostapd_iface *iface, void *ctx)
 {
 	struct wpa_auth_oui_iface_iter_data *idata = ctx;
 	struct oui_deliver_later_data *data;
-	struct hostapd_data *hapd;
+	struct hostapd_data *hapd, *src_hapd = idata->src_hapd;
 	size_t j;
 
 	for (j = 0; j < iface->num_bss; j++) {
 		hapd = iface->bss[j];
-		if (hapd == idata->src_hapd)
-			continue;
-		if (os_memcmp(hapd->conf->mobility_domain,
-			      idata->src_hapd->conf->mobility_domain,
+		if (hapd == src_hapd)
+			continue; /* don't deliver back to same interface */
+		if (!wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) ||
+		    hapd->conf->ssid.ssid_len !=
+		    src_hapd->conf->ssid.ssid_len ||
+		    os_memcmp(hapd->conf->ssid.ssid,
+			      src_hapd->conf->ssid.ssid,
+			      hapd->conf->ssid.ssid_len) != 0 ||
+		    os_memcmp(hapd->conf->mobility_domain,
+			      src_hapd->conf->mobility_domain,
 			      MOBILITY_DOMAIN_ID_LEN) != 0)
-			continue;
+			continue; /* no matching FT SSID/mobility domain */
 		if (!is_multicast_ether_addr(idata->dst_addr) &&
 		    os_memcmp(hapd->own_addr, idata->dst_addr, ETH_ALEN) != 0)
-			continue;
+			continue; /* destination address does not match */
 
 		/* defer eth_p_oui_deliver until next eloop step as this is
 		 * when it would be triggerd from reading from sock
@@ -746,11 +752,11 @@ static int hostapd_wpa_auth_oui_iter(struct hostapd_iface *iface, void *ctx)
 		wpa_printf(MSG_DEBUG,
 			   "RRB(%s): local delivery to %s dst=" MACSTR
 			   " oui_suffix=%u data_len=%u data=%p",
-			   idata->src_hapd->conf->iface, hapd->conf->iface,
+			   src_hapd->conf->iface, hapd->conf->iface,
 			   MAC2STR(idata->dst_addr), idata->oui_suffix,
 			   (unsigned int) idata->data_len, data);
 
-		os_memcpy(data->src_addr, idata->src_hapd->own_addr, ETH_ALEN);
+		os_memcpy(data->src_addr, src_hapd->own_addr, ETH_ALEN);
 		os_memcpy(data->dst_addr, idata->dst_addr, ETH_ALEN);
 		os_memcpy(data + 1, idata->data, idata->data_len);
 		data->data_len = idata->data_len;