qcacmn: RNR IE parsing support

Add RNR IE parsing support on scan module. Change-Id: I7a0685f16a61a45910212b2d8fe5cbc12b5bd92e CRs-Fixed: 2557271
2026-10-13 00:00:00 -04:00 · 2019-10-30 00:38:16 -07:00 · 2019-10-30 00:38:16 -07:00 · aba2b0c42b
commit aba2b0c42b
parent 90f0c5ed06
3 changed files with 204 additions and 0 deletions
--- a/umac/cmn_services/cmn_defs/inc/wlan_cmn_ieee80211.h
+++ b/umac/cmn_services/cmn_defs/inc/wlan_cmn_ieee80211.h
@ -121,6 +121,7 @@
 #define WLAN_IBSS_IE_MAX_LEN                     2
 #define WLAN_REQUEST_IE_MAX_LEN                  255
 #define WLAN_RM_CAPABILITY_IE_MAX_LEN            5
+#define WLAN_RNR_IE_MIN_LEN                      5

 /* HT capability flags */
 #define WLAN_HTCAP_C_ADVCODING             0x0001
@ -392,6 +393,7 @@ enum element_ie {
 	WLAN_ELEMID_AID              = 197,
 	WLAN_ELEMID_QUIET_CHANNEL    = 198,
 	WLAN_ELEMID_OP_MODE_NOTIFY   = 199,
+	WLAN_ELEMID_REDUCED_NEIGHBOR_REPORT = 201,
 	WLAN_ELEMID_VENDOR           = 221,
 	WLAN_ELEMID_FILS_INDICATION  = 240,
 	WLAN_ELEMID_EXTN_ELEM        = 255,
--- a/umac/scan/dispatcher/inc/wlan_scan_public_structs.h
+++ b/umac/scan/dispatcher/inc/wlan_scan_public_structs.h
@ -35,6 +35,7 @@ typedef uint32_t wlan_scan_id;

 #define WLAN_SCAN_MAX_NUM_SSID          16
 #define WLAN_SCAN_MAX_NUM_BSSID         4
+#define MAX_RNR_BSS 5

 #define SCM_CANCEL_SCAN_WAIT_TIME 50
 #define SCM_CANCEL_SCAN_WAIT_ITERATION 600
@ -154,6 +155,7 @@ struct element_info {
 * @fils_indication: pointer to FILS indication ie
 * @esp: pointer to ESP indication ie
 * @mbo_oce: pointer to mbo/oce indication ie
+ * @rnrie: reduced neighbor report IE
 * @adaptive_11r: pointer to adaptive 11r IE
 */
 struct ie_list {
@ -203,6 +205,7 @@ struct ie_list {
 	uint8_t *esp;
 	uint8_t *mbo_oce;
 	uint8_t *muedca;
+	uint8_t *rnrie;
 	uint8_t *extender;
 	uint8_t *adaptive_11r;
 };
@ -278,6 +281,82 @@ struct scan_mbssid_info {
 	uint8_t trans_bssid[QDF_MAC_ADDR_SIZE];
 };

+/**
+ * struct rnr_bss_info - Reduced Neighbor Report BSS information
+ * @neighbor_ap_tbtt_offset: Neighbor AP TBTT offset
+ * @channel_number: channel number
+ * @operating_class: operting class
+ * @bssid: BSS MAC address
+ * @short_ssid: short ssid
+ * @bss_params: BSS parameters
+ */
+struct rnr_bss_info {
+	uint8_t neighbor_ap_tbtt_offset;
+	uint32_t channel_number;
+	uint32_t operating_class;
+	struct qdf_mac_addr bssid;
+	uint32_t short_ssid;
+	uint8_t bss_params;
+};
+
+/**
+ * struct tbtt_information_header - TBTT information header
+ * @tbbt_info_fieldtype: TBTT information field type
+ * @filter_neighbor_ap: filtered neighbor ap
+ * @tbbt_info_count: TBTT information count
+ * @tbtt_info_length: TBTT informaiton length
+ */
+struct tbtt_information_header {
+	uint16_t tbbt_info_fieldtype:2;
+	uint16_t filtered_neighbor_ap:1;
+	uint16_t reserved:1;
+	uint16_t tbtt_info_count:4;
+	uint16_t tbtt_info_length:8;
+};
+
+/**
+ * struct neighbor_ap_info_field - Neighbor information field
+ * @tbtt_info_header: TBTT information header
+ * @operting_class: operating class
+ * @channel_number: channel number
+ */
+struct neighbor_ap_info_field {
+	struct tbtt_information_header tbtt_header;
+	uint8_t operting_class;
+	uint8_t channel_number;
+};
+
+/**
+ * enum tbtt_information_field - TBTT information field
+ * @TBTT_NEIGHBOR_AP_OFFSET_ONLY: TBTT information field type
+ * @TBTT_NEIGHBOR_AP_BSS_PARAM: neighbor AP and bss param
+ * @TBTT_NEIGHBOR_AP_SHORTSSID: neighbor AP and Short ssid
+ * @TBTT_NEIGHBOR_AP_S_SSID_BSS_PARAM: neighbor AP, short ssid and bss param
+ * @TBTT_NEIGHBOR_AP_BSSID: neighbor AP and bssid
+ * @TBTT_NEIGHBOR_AP_BSSID_BSS_PARAM: neighbor AP, bssid and bss param
+ * @TBTT_NEIGHBOR_AP_BSSSID_S_SSID: neighbor AP, bssid and short ssid
+ * @TBTT_NEIGHBOR_AP_BSSID_S_SSID_BSS_PARAM: neighbor AP, bssid, short ssid
+ * and bss params
+ */
+enum tbtt_information_field {
+	TBTT_NEIGHBOR_AP_OFFSET_ONLY = 1,
+	TBTT_NEIGHBOR_AP_BSS_PARAM = 2,
+	TBTT_NEIGHBOR_AP_SHORTSSID = 5,
+	TBTT_NEIGHBOR_AP_S_SSID_BSS_PARAM = 6,
+	TBTT_NEIGHBOR_AP_BSSID = 7,
+	TBTT_NEIGHBOR_AP_BSSID_BSS_PARAM = 8,
+	TBTT_NEIGHBOR_AP_BSSSID_S_SSID = 11,
+	TBTT_NEIGHBOR_AP_BSSID_S_SSID_BSS_PARAM = 12
+};
+
+/**
+ * struct reduced_neighbor_report - Reduced Neighbor Report
+ * @bss_info: RNR BSS Information
+ */
+struct reduced_neighbor_report {
+	struct rnr_bss_info bss_info[MAX_RNR_BSS];
+};
+
 /**
 * struct scan_cache_entry: structure containing scan entry
 * @frm_subtype: updated from beacon/probe
@ -306,6 +385,7 @@ struct scan_mbssid_info {
 * @hidden_ssid_timestamp: boottime in microsec when hidden
 *                         ssid was received
 * @mbssid_info: Multi bssid information
+ * @rnr: Reduced neighbor report information
 * @channel: channel info on which AP is present
 * @channel_mismatch: if channel received in metadata
 *                    doesnot match the one in beacon
@ -350,6 +430,7 @@ struct scan_cache_entry {
 	qdf_time_t rssi_timestamp;
 	qdf_time_t hidden_ssid_timestamp;
 	struct scan_mbssid_info mbssid_info;
+	struct reduced_neighbor_report rnr;
 	struct channel_info channel;
 	bool channel_mismatch;
 	struct mlme_info mlme_info;
--- a/umac/scan/dispatcher/src/wlan_scan_utils_api.c
+++ b/umac/scan/dispatcher/src/wlan_scan_utils_api.c
@ -28,6 +28,9 @@
 #include <wlan_reg_services_api.h>

 #define MAX_IE_LEN 1024
+#define SHORT_SSID_LEN 4
+#define NEIGHBOR_AP_LEN 1
+#define BSS_PARAMS_LEN 1

 const char*
 util_scan_get_ev_type_name(enum scan_event_type type)
@ -559,6 +562,116 @@ util_scan_is_hidden_ssid(struct ie_ssid *ssid)
 	return true;
 }

+static QDF_STATUS
+util_scan_update_rnr(struct rnr_bss_info *rnr,
+		     struct neighbor_ap_info_field *ap_info,
+		     uint8_t **data)
+{
+	uint16_t fieldtype;
+	uint8_t *tmp = *data;
+
+	fieldtype = ap_info->tbtt_header.tbbt_info_fieldtype;
+
+	switch (fieldtype) {
+	case TBTT_NEIGHBOR_AP_OFFSET_ONLY:
+		/* Dont store it skip*/
+		*data = tmp + NEIGHBOR_AP_LEN;
+		break;
+
+	case TBTT_NEIGHBOR_AP_BSS_PARAM:
+		/* Dont store it skip*/
+		break;
+
+	case TBTT_NEIGHBOR_AP_SHORTSSID:
+		rnr->channel_number = ap_info->channel_number;
+		rnr->operating_class = ap_info->operting_class;
+		qdf_mem_copy(&rnr->short_ssid, &tmp[1], SHORT_SSID_LEN);
+		*data = tmp + NEIGHBOR_AP_LEN + SHORT_SSID_LEN;
+		break;
+
+	case TBTT_NEIGHBOR_AP_S_SSID_BSS_PARAM:
+		rnr->channel_number = ap_info->channel_number;
+		rnr->operating_class = ap_info->operting_class;
+		qdf_mem_copy(&rnr->short_ssid, &tmp[1], SHORT_SSID_LEN);
+		rnr->bss_params = tmp[5];
+		*data = tmp + NEIGHBOR_AP_LEN + SHORT_SSID_LEN + BSS_PARAMS_LEN;
+		break;
+
+	case TBTT_NEIGHBOR_AP_BSSID:
+		rnr->channel_number = ap_info->channel_number;
+		rnr->operating_class = ap_info->operting_class;
+		qdf_mem_copy(&rnr->bssid, &tmp[1], QDF_MAC_ADDR_SIZE);
+		*data = tmp + NEIGHBOR_AP_LEN + QDF_MAC_ADDR_SIZE;
+		break;
+
+	case TBTT_NEIGHBOR_AP_BSSID_BSS_PARAM:
+		rnr->channel_number = ap_info->channel_number;
+		rnr->operating_class = ap_info->operting_class;
+		qdf_mem_copy(&rnr->bssid, &tmp[1], QDF_MAC_ADDR_SIZE);
+		rnr->bss_params = tmp[7];
+		*data = tmp + NEIGHBOR_AP_LEN + QDF_MAC_ADDR_SIZE
+			+ BSS_PARAMS_LEN;
+		break;
+
+	case TBTT_NEIGHBOR_AP_BSSSID_S_SSID:
+		rnr->channel_number = ap_info->channel_number;
+		rnr->operating_class = ap_info->operting_class;
+		qdf_mem_copy(&rnr->bssid, &tmp[1], QDF_MAC_ADDR_SIZE);
+		qdf_mem_copy(&rnr->short_ssid, &tmp[7], SHORT_SSID_LEN);
+		*data = tmp + NEIGHBOR_AP_LEN + QDF_MAC_ADDR_SIZE
+			+ SHORT_SSID_LEN;
+		break;
+
+	case TBTT_NEIGHBOR_AP_BSSID_S_SSID_BSS_PARAM:
+		rnr->channel_number = ap_info->channel_number;
+		rnr->operating_class = ap_info->operting_class;
+		qdf_mem_copy(&rnr->bssid, &tmp[1], QDF_MAC_ADDR_SIZE);
+		qdf_mem_copy(&rnr->short_ssid, &tmp[7], SHORT_SSID_LEN);
+		rnr->bss_params = tmp[11];
+		*data = tmp + NEIGHBOR_AP_LEN + QDF_MAC_ADDR_SIZE
+			+ SHORT_SSID_LEN + BSS_PARAMS_LEN;
+		break;
+
+	default:
+		scm_debug("Wrong fieldtype");
+	}
+
+	return QDF_STATUS_SUCCESS;
+}
+
+static QDF_STATUS
+util_scan_parse_rnr_ie(struct scan_cache_entry *scan_entry,
+		       struct ie_header *ie)
+{
+	uint32_t rnr_ie_len;
+	uint16_t tbtt_count, tbtt_length, i, fieldtype;
+	uint8_t *data;
+	struct neighbor_ap_info_field *neighbor_ap_info;
+
+	rnr_ie_len = ie->ie_len;
+	data = (uint8_t *)ie + sizeof(struct ie_header);
+
+	while (data < (uint8_t *)ie + rnr_ie_len + 2) {
+		neighbor_ap_info = (struct neighbor_ap_info_field *)data;
+		tbtt_count = neighbor_ap_info->tbtt_header.tbtt_info_count;
+		tbtt_length = neighbor_ap_info->tbtt_header.tbtt_info_length;
+		fieldtype = neighbor_ap_info->tbtt_header.tbbt_info_fieldtype;
+		scm_debug("channel number %d, op class %d",
+			  neighbor_ap_info->channel_number,
+			  neighbor_ap_info->operting_class);
+		scm_debug("tbtt_count %d, tbtt_length %d, fieldtype %d",
+			  tbtt_count, tbtt_length, fieldtype);
+		for (i = 0; i < tbtt_count && i < MAX_RNR_BSS; i++) {
+			data = data + sizeof(struct neighbor_ap_info_field);
+			util_scan_update_rnr(&scan_entry->rnr.bss_info[i],
+					     neighbor_ap_info,
+					     &data);
+		}
+	}
+
+	return QDF_STATUS_SUCCESS;
+}
+
 static QDF_STATUS
 util_scan_parse_extn_ie(struct scan_cache_entry *scan_params,
 	struct ie_header *ie)
@ -877,6 +990,14 @@ util_scan_populate_bcn_ie_list(struct scan_cache_entry *scan_params,
 			if (QDF_IS_STATUS_ERROR(status))
 				goto err_status;
 			break;
+		case WLAN_ELEMID_REDUCED_NEIGHBOR_REPORT:
+			if (ie->ie_len < WLAN_RNR_IE_MIN_LEN)
+				goto err;
+			scan_params->ie_list.rnrie = (uint8_t *)ie;
+			status = util_scan_parse_rnr_ie(scan_params, ie);
+			if (QDF_IS_STATUS_ERROR(status))
+				goto err_status;
+			break;
 		default:
 			break;
 		}