hostapd: Add a configuration to set an AP as stationary

Add a configuration option in hostapd.conf and in neighbor report that
sets an AP as stationary. To enable this option on the current AP set
the config option stationary_ap to 1. To set a neighbor entry to be
marked as stationary add the word stat to the SET_NEIGHBOR command. This
option tells hostapd to send LCI data even if it is older than requested
by max age subelement in RRM request.

Signed-off-by: David Spinadel <david.spinadel@intel.com>

hostapd/config_file.c

@@ -3510,6 +3510,8 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 				WLAN_RRM_CAPS_NEIGHBOR_REPORT;
 	} else if (os_strcmp(buf, "gas_address3") == 0) {
 		bss->gas_address3 = atoi(pos);
+	} else if (os_strcmp(buf, "stationary_ap") == 0) {
+		conf->stationary_ap = atoi(pos);
 	} else if (os_strcmp(buf, "ftm_responder") == 0) {
 		bss->ftm_responder = atoi(pos);
 	} else if (os_strcmp(buf, "ftm_initiator") == 0) {

hostapd/ctrl_iface.c

@@ -2174,6 +2174,7 @@ static int hostapd_ctrl_iface_set_neighbor(struct hostapd_data *hapd, char *buf)
 	struct wpa_ssid_value ssid;
 	u8 bssid[ETH_ALEN];
 	struct wpabuf *nr, *lci = NULL, *civic = NULL;
+	int stationary = 0;
 	char *tmp;
 	int ret;
 
@@ -2252,8 +2253,15 @@ static int hostapd_ctrl_iface_set_neighbor(struct hostapd_data *hapd, char *buf)
 		}
 	}
 
+	if (!buf)
+		goto set;
+
+	if (os_strstr(buf, "stat"))
+		stationary = 1;
+
 set:
-	ret = hostapd_neighbor_set(hapd, bssid, &ssid, nr, lci, civic);
+	ret = hostapd_neighbor_set(hapd, bssid, &ssid, nr, lci, civic,
+				   stationary);
 
 	wpabuf_free(nr);
 	wpabuf_free(lci);

hostapd/hostapd.conf

@@ -1940,6 +1940,12 @@ own_ip_addr=127.0.0.1
 # This parameter only controls publishing via Extended Capabilities element.
 # Actual functionality is managed outside hostapd.
 #ftm_initiator=0
+#
+# Stationary AP config indicates that the AP doesn't move hence location data
+# can be considered as always up to date. If configured, LCI data will be sent
+# as a radio measurement even if the request doesn't contain a max age element
+# that allows sending of such data. Default: 0.
+#stationary_ap=0
 
 ##### TESTING OPTIONS #########################################################
 #

hostapd/hostapd_cli.c

@@ -1255,14 +1255,14 @@ static int hostapd_cli_cmd_set_neighbor(struct wpa_ctrl *ctrl, int argc,
 	char cmd[2048];
 	int res;
 
-	if (argc < 3 || argc > 5) {
+	if (argc < 3 || argc > 6) {
-		printf("Invalid set_neighbor command: needs 3-5 arguments\n");
+		printf("Invalid set_neighbor command: needs 3-6 arguments\n");
 		return -1;
 	}
 
-	res = os_snprintf(cmd, sizeof(cmd), "SET_NEIGHBOR %s %s %s %s %s",
+	res = os_snprintf(cmd, sizeof(cmd), "SET_NEIGHBOR %s %s %s %s %s %s",
 			  argv[0], argv[1], argv[2], argc >= 4 ? argv[3] : "",
-			  argc == 5 ? argv[4] : "");
+			  argc >= 5 ? argv[4] : "", argc == 6 ? argv[5] : "");
 	if (os_snprintf_error(sizeof(cmd), res)) {
 		printf("Too long SET_NEIGHBOR command.\n");
 		return -1;

src/ap/ap_config.h

@@ -713,6 +713,7 @@ struct hostapd_config {
 
 	struct wpabuf *lci;
 	struct wpabuf *civic;
+	int stationary_ap;
 };
 
 

src/ap/hostapd.c

@@ -1645,7 +1645,7 @@ static void hostapd_set_own_neighbor_report(struct hostapd_data *hapd)
 	wpabuf_put_u8(nr, center_freq2);
 
 	hostapd_neighbor_set(hapd, hapd->own_addr, &ssid, nr, hapd->iconf->lci,
-			     hapd->iconf->civic);
+			     hapd->iconf->civic, hapd->iconf->stationary_ap);
 
 	wpabuf_free(nr);
 #endif /* NEED_AP_MLME */

src/ap/hostapd.h

@@ -109,6 +109,7 @@ struct hostapd_neighbor_entry {
 	struct wpabuf *civic;
 	/* LCI update time */
 	struct os_time lci_date;
+	int stationary;
 };
 
 /**

src/ap/neighbor_db.c

@@ -43,6 +43,7 @@ static void hostapd_neighbor_clear_entry(struct hostapd_neighbor_entry *nr)
 	nr->civic = NULL;
 	os_memset(nr->bssid, 0, sizeof(nr->bssid));
 	os_memset(&nr->ssid, 0, sizeof(nr->ssid));
+	nr->stationary = 0;
 }
 
 
@@ -64,7 +65,7 @@ hostapd_neighbor_add(struct hostapd_data *hapd)
 int hostapd_neighbor_set(struct hostapd_data *hapd, const u8 *bssid,
 			 const struct wpa_ssid_value *ssid,
 			 const struct wpabuf *nr, const struct wpabuf *lci,
-			 const struct wpabuf *civic)
+			 const struct wpabuf *civic, int stationary)
 {
 	struct hostapd_neighbor_entry *entry;
 
@@ -95,6 +96,8 @@ int hostapd_neighbor_set(struct hostapd_data *hapd, const u8 *bssid,
 			goto fail;
 	}
 
+	entry->stationary = stationary;
+
 	return 0;
 
 fail:

src/ap/neighbor_db.h

@@ -16,7 +16,7 @@ hostapd_neighbor_get(struct hostapd_data *hapd, const u8 *bssid,
 int hostapd_neighbor_set(struct hostapd_data *hapd, const u8 *bssid,
 			 const struct wpa_ssid_value *ssid,
 			 const struct wpabuf *nr, const struct wpabuf *lci,
-			 const struct wpabuf *civic);
+			 const struct wpabuf *civic, int stationary);
 int hostapd_neighbor_remove(struct hostapd_data *hapd, const u8 *bssid,
 			    const struct wpa_ssid_value *ssid);
 void hostpad_free_neighbor_db(struct hostapd_data *hapd);

src/ap/rrm.c

@@ -129,12 +129,12 @@ static int hostapd_check_lci_age(struct hostapd_neighbor_entry *nr, u16 max_age)
 	struct os_time curr, diff;
 	unsigned long diff_l;
 
+	if (nr->stationary || max_age == 0xffff)
+		return 1;
+
 	if (!max_age)
 		return 0;
 
-	if (max_age == 0xffff)
-		return 1;
-
 	if (os_get_time(&curr))
 		return 0;