wpa_supplicant: Add LCI and civic request to Neighbor Report Request

Add an option to request LCI and Location Civic Measurement in Neighbor
Report Request frame, as described in IEEE P802.11-REVmc/D5.0, 9.6.7.6.

Note: This changes the encoding format of the NEIGHBOR_REP_REQUEST
ssid=<val> parameter. This used to be parsed as raw SSID data which is
problematic for accepting additional parameters. The new encoding allows
either a string within double-quotation marks or a hexdump of the raw
SSID.

Thew new format:
NEIGHBOR_REP_REQUEST [ssid=<SSID>] [lci] [civic]

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

wpa_supplicant/ctrl_iface.c

@@ -8222,19 +8222,37 @@ static void wpas_ctrl_neighbor_rep_cb(void *ctx, struct wpabuf *neighbor_rep)
 static int wpas_ctrl_iface_send_neigbor_rep(struct wpa_supplicant *wpa_s,
 					    char *cmd)
 {
-	struct wpa_ssid ssid;
+	struct wpa_ssid_value ssid, *ssid_p = NULL;
-	struct wpa_ssid *ssid_p = NULL;
+	int ret, lci = 0, civic = 0;
-	int ret = 0;
+	char *ssid_s;
 
-	if (os_strncmp(cmd, " ssid=", 6) == 0) {
+	ssid_s = os_strstr(cmd, "ssid=");
-		ssid.ssid_len = os_strlen(cmd + 6);
+	if (ssid_s) {
-		if (ssid.ssid_len > SSID_MAX_LEN)
+		if (ssid_parse(ssid_s + 5, &ssid)) {
+			wpa_printf(MSG_ERROR,
+				   "CTRL: Send Neighbor Report: bad SSID");
 			return -1;
-		ssid.ssid = (u8 *) (cmd + 6);
-		ssid_p = &ssid;
 		}
 
-	ret = wpas_rrm_send_neighbor_rep_request(wpa_s, ssid_p,
+		ssid_p = &ssid;
+
+		/*
+		 * Move cmd after the SSID text that may include "lci" or
+		 * "civic".
+		 */
+		cmd = os_strchr(ssid_s + 6, ssid_s[5] == '"' ? '"' : ' ');
+		if (cmd)
+			cmd++;
+
+	}
+
+	if (cmd && os_strstr(cmd, "lci"))
+		lci = 1;
+
+	if (cmd && os_strstr(cmd, "civic"))
+		civic = 1;
+
+	ret = wpas_rrm_send_neighbor_rep_request(wpa_s, ssid_p, lci, civic,
 						 wpas_ctrl_neighbor_rep_cb,
 						 wpa_s);
 

wpa_supplicant/wpa_cli.c

@@ -3455,8 +3455,7 @@ static const struct wpa_cli_cmd wpa_cli_commands[] = {
 	},
 	{ "neighbor_rep_request",
 	  wpa_cli_cmd_neighbor_rep_request, NULL, cli_cmd_flag_none,
-	  "[ssid=<SSID>] = Trigger request to AP for neighboring AP report "
+	  "[ssid=<SSID>] [lci] [civic] = Trigger request to AP for neighboring AP report (with optional given SSID in hex or enclosed in double quotes, default: current SSID; with optional LCI and location civic request)"
-	  "(with optional given SSID, default: current SSID)"
 	},
 	{ "erp_flush", wpa_cli_cmd_erp_flush, NULL, cli_cmd_flag_none,
 	  "= flush ERP keys" },

wpa_supplicant/wpa_supplicant.c

@@ -6162,11 +6162,19 @@ void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
 #define ECANCELED -1
 #endif
 
+/* Measurement Request element + Location Subject + Maximum Age subelement */
+#define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4)
+/* Measurement Request element + Location Civic Request */
+#define MEASURE_REQUEST_CIVIC_LEN (3 + 5)
+
+
 /**
  * wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP
  * @wpa_s: Pointer to wpa_supplicant
  * @ssid: if not null, this is sent in the request. Otherwise, no SSID IE
  *	  is sent in the request.
+ * @lci: if set, neighbor request will include LCI request
+ * @civic: if set, neighbor request will include civic location request
  * @cb: Callback function to be called once the requested report arrives, or
  *	timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds.
  *	In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's
@@ -6180,7 +6188,8 @@ void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
  * Request must contain a callback function.
  */
 int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
-				       const struct wpa_ssid *ssid,
+				       const struct wpa_ssid_value *ssid,
+				       int lci, int civic,
 				       void (*cb)(void *ctx,
 						  struct wpabuf *neighbor_rep),
 				       void *cb_ctx)
@@ -6221,7 +6230,9 @@ int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
 	}
 
 	/* 3 = action category + action code + dialog token */
-	buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0));
+	buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) +
+			   (lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) +
+			   (civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0));
 	if (buf == NULL) {
 		wpa_printf(MSG_DEBUG,
 			   "RRM: Failed to allocate Neighbor Report Request");
@@ -6241,6 +6252,72 @@ int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
 		wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len);
 	}
 
+	if (lci) {
+		/* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
+		wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
+		wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN);
+
+		/*
+		 * Measurement token; nonzero number that is unique among the
+		 * Measurement Request elements in a particular frame.
+		 */
+		wpabuf_put_u8(buf, 1); /* Measurement Token */
+
+		/*
+		 * Parallel, Enable, Request, and Report bits are 0, Duration is
+		 * reserved.
+		 */
+		wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
+		wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */
+
+		/* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */
+		/* Location Subject */
+		wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
+
+		/* Optional Subelements */
+		/*
+		 * IEEE P802.11-REVmc/D5.0 Figure 9-170
+		 * The Maximum Age subelement is required, otherwise the AP can
+		 * send only data that was determined after receiving the
+		 * request. Setting it here to unlimited age.
+		 */
+		wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE);
+		wpabuf_put_u8(buf, 2);
+		wpabuf_put_le16(buf, 0xffff);
+	}
+
+	if (civic) {
+		/* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
+		wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
+		wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN);
+
+		/*
+		 * Measurement token; nonzero number that is unique among the
+		 * Measurement Request elements in a particular frame.
+		 */
+		wpabuf_put_u8(buf, 2); /* Measurement Token */
+
+		/*
+		 * Parallel, Enable, Request, and Report bits are 0, Duration is
+		 * reserved.
+		 */
+		wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
+		/* Measurement Type */
+		wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC);
+
+		/* IEEE P802.11-REVmc/D5.0 9.4.2.21.14:
+		 * Location Civic request */
+		/* Location Subject */
+		wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
+		wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */
+		/* Location Service Interval Units: Seconds */
+		wpabuf_put_u8(buf, 0);
+		/* Location Service Interval: 0 - Only one report is requested
+		 */
+		wpabuf_put_le16(buf, 0);
+		/* No optional subelements */
+	}
+
 	wpa_s->rrm.next_neighbor_rep_token++;
 
 	if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,

wpa_supplicant/wpa_supplicant_i.h

@@ -1163,7 +1163,8 @@ void wpas_rrm_reset(struct wpa_supplicant *wpa_s);
 void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
 				   const u8 *report, size_t report_len);
 int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
-				       const struct wpa_ssid *ssid,
+				       const struct wpa_ssid_value *ssid,
+				       int lci, int civic,
 				       void (*cb)(void *ctx,
 						  struct wpabuf *neighbor_rep),
 				       void *cb_ctx);