nl80211: DPP listen mode callback

Update frame processing registration for DPP Public Action frames to
include multicast reception when in DPP listen mode and the driver
indicates support for this type of explicit request.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

src/drivers/driver_nl80211.c

@@ -2165,7 +2165,8 @@ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
 
 static int nl80211_register_frame(struct i802_bss *bss,
 				  struct nl_sock *nl_handle,
-				  u16 type, const u8 *match, size_t match_len)
+				  u16 type, const u8 *match, size_t match_len,
+				  bool multicast)
 {
 	struct wpa_driver_nl80211_data *drv = bss->drv;
 	struct nl_msg *msg;
@@ -2174,10 +2175,12 @@ static int nl80211_register_frame(struct i802_bss *bss,
 
 	buf[0] = '\0';
 	wpa_snprintf_hex(buf, sizeof(buf), match, match_len);
-	wpa_printf(MSG_DEBUG, "nl80211: Register frame type=0x%x (%s) nl_handle=%p match=%s",
+	wpa_printf(MSG_DEBUG,
-		   type, fc2str(type), nl_handle, buf);
+		   "nl80211: Register frame type=0x%x (%s) nl_handle=%p match=%s multicast=%d",
+		   type, fc2str(type), nl_handle, buf, multicast);
 
 	if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_REGISTER_FRAME)) ||
+	    (multicast && nla_put_flag(msg, NL80211_ATTR_RECEIVE_MULTICAST)) ||
 	    nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE, type) ||
 	    nla_put(msg, NL80211_ATTR_FRAME_MATCH, match_len, match)) {
 		nlmsg_free(msg);
@@ -2225,7 +2228,7 @@ static int nl80211_register_action_frame(struct i802_bss *bss,
 {
 	u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
 	return nl80211_register_frame(bss, bss->nl_mgmt,
-				      type, match, match_len);
+				      type, match, match_len, false);
 }
 
 
@@ -2242,12 +2245,12 @@ static int nl80211_mgmt_subscribe_non_ap(struct i802_bss *bss)
 
 	if (drv->nlmode == NL80211_IFTYPE_ADHOC) {
 		/* register for any AUTH message */
-		nl80211_register_frame(bss, bss->nl_mgmt, type, NULL, 0);
+		nl80211_register_frame(bss, bss->nl_mgmt, type, NULL, 0, false);
 	} else if ((drv->capa.flags & WPA_DRIVER_FLAGS_SAE) &&
 		   !(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
 		/* register for SAE Authentication frames */
 		nl80211_register_frame(bss, bss->nl_mgmt, type,
-				       (u8 *) "\x03\x00", 2);
+				       (u8 *) "\x03\x00", 2, false);
 	}
 
 #ifdef CONFIG_INTERWORKING
@@ -2389,7 +2392,7 @@ static int nl80211_mgmt_subscribe_mesh(struct i802_bss *bss)
 	if (nl80211_register_frame(bss, bss->nl_mgmt,
 				   (WLAN_FC_TYPE_MGMT << 2) |
 				   (WLAN_FC_STYPE_AUTH << 4),
-				   NULL, 0) < 0)
+				   NULL, 0, false) < 0)
 		ret = -1;
 
 	/* Mesh peering open */
@@ -2495,7 +2498,7 @@ static int nl80211_mgmt_subscribe_ap(struct i802_bss *bss)
 		if (nl80211_register_frame(bss, bss->nl_mgmt,
 					   (WLAN_FC_TYPE_MGMT << 2) |
 					   (stypes[i] << 4),
-					   NULL, 0) < 0) {
+					   NULL, 0, false) < 0) {
 			goto out_err;
 		}
 	}
@@ -2529,8 +2532,8 @@ static int nl80211_mgmt_subscribe_ap_dev_sme(struct i802_bss *bss)
 		u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_AUTH << 4);
 
 		/* Register for all Authentication frames */
-		if (nl80211_register_frame(bss, bss->nl_mgmt, type, NULL, 0)
+		if (nl80211_register_frame(bss, bss->nl_mgmt, type, NULL, 0,
-		    < 0)
+					   false) < 0)
 			wpa_printf(MSG_DEBUG,
 				   "nl80211: Failed to subscribe to handle Authentication frames - SAE offload may not work");
 	}
@@ -7931,7 +7934,7 @@ static int wpa_driver_nl80211_probe_req_report(struct i802_bss *bss, int report)
 	if (nl80211_register_frame(bss, bss->nl_preq,
 				   (WLAN_FC_TYPE_MGMT << 2) |
 				   (WLAN_FC_STYPE_PROBE_REQ << 4),
-				   NULL, 0) < 0)
+				   NULL, 0, false) < 0)
 		goto out_err;
 
 	nl80211_register_eloop_read(&bss->nl_preq,
@@ -11433,6 +11436,28 @@ fail:
 }
 
 
+#ifdef CONFIG_DPP
+static int nl80211_dpp_listen(void *priv, bool enable)
+{
+	struct i802_bss *bss = priv;
+	struct wpa_driver_nl80211_data *drv = bss->drv;
+	u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
+	struct nl_sock *handle;
+
+	if (!drv->multicast_registrations || !bss->nl_mgmt)
+		return 0; /* cannot do more than hope broadcast RX works */
+
+	wpa_printf(MSG_DEBUG,
+		   "nl80211: Update DPP Public Action frame registration (%s multicast RX)",
+		   enable ? "enable" : "disable");
+	handle = (void *) (((intptr_t) bss->nl_mgmt) ^ ELOOP_SOCKET_INVALID);
+	return nl80211_register_frame(bss, handle, type,
+				      (u8 *) "\x04\x09\x50\x6f\x9a\x1a", 6,
+				      enable);
+}
+#endif /* CONFIG_DPP */
+
+
 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
 	.name = "nl80211",
 	.desc = "Linux nl80211/cfg80211",
@@ -11568,4 +11593,7 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
 	.update_connect_params = nl80211_update_connection_params,
 	.send_external_auth_status = nl80211_send_external_auth_status,
 	.set_4addr_mode = nl80211_set_4addr_mode,
+#ifdef CONFIG_DPP
+	.dpp_listen = nl80211_dpp_listen,
+#endif /* CONFIG_DPP */
 };

src/drivers/driver_nl80211.h

@@ -172,6 +172,7 @@ struct wpa_driver_nl80211_data {
 	unsigned int get_supported_akm_suites_avail:1;
 	unsigned int add_sta_node_vendor_cmd_avail:1;
 	unsigned int control_port_ap:1;
+	unsigned int multicast_registrations:1;
 
 	u64 vendor_scan_cookie;
 	u64 remain_on_chan_cookie;

src/drivers/driver_nl80211_capa.c

@@ -460,6 +460,10 @@ static void wiphy_info_ext_feature_flags(struct wiphy_info_data *info,
 	if (ext_feature_isset(ext_features, len,
 			      NL80211_EXT_FEATURE_EXT_KEY_ID))
 		capa->flags |= WPA_DRIVER_FLAGS_EXTENDED_KEY_ID;
+
+	if (ext_feature_isset(ext_features, len,
+			      NL80211_EXT_FEATURE_MULTICAST_REGISTRATIONS))
+		info->drv->multicast_registrations = 1;
 }