/* Radio Measurement capabilities (from RRM Capabilities IE) */
/* byte 1 (out of 5) */
+#define WLAN_RRM_CAPS_LINK_MEASUREMENT BIT(0)
#define WLAN_RRM_CAPS_NEIGHBOR_REPORT BIT(1)
/* Timeout Interval Type */
#define CHAN_SWITCH_MODE_ALLOW_TX 0
#define CHAN_SWITCH_MODE_BLOCK_TX 1
+struct tpc_report {
+ u8 eid;
+ u8 len;
+ u8 tx_power;
+ u8 link_margin;
+} STRUCT_PACKED;
+
+/* IEEE Std 802.11-2012, 8.5.7.4 - Link Measurement Request frame format */
+struct rrm_link_measurement_request {
+ u8 dialog_token;
+ s8 tx_power;
+ s8 max_tp;
+ u8 variable[0];
+} STRUCT_PACKED;
+
+/* IEEE Std 802.11-2012, 8.5.7.5 - Link Measurement Report frame format */
+struct rrm_link_measurement_report {
+ u8 dialog_token;
+ struct tpc_report tpc;
+ u8 rx_ant_id;
+ u8 tx_ant_id;
+ u8 rcpi;
+ u8 rsni;
+ u8 variable[0];
+} STRUCT_PACKED;
+
#endif /* IEEE802_11_DEFS_H */
static void wpas_event_rx_mgmt_action(struct wpa_supplicant *wpa_s,
- const u8 *frame, size_t len, int freq)
+ const u8 *frame, size_t len, int freq,
+ int rssi)
{
const struct ieee80211_mgmt *mgmt;
const u8 *payload;
return;
}
+ if (category == WLAN_ACTION_RADIO_MEASUREMENT &&
+ payload[0] == WLAN_RRM_LINK_MEASUREMENT_REQUEST) {
+ wpas_rrm_handle_link_measurement_request(wpa_s, mgmt->sa,
+ payload + 1, plen - 1,
+ rssi);
+ return;
+ }
+
wpas_p2p_rx_action(wpa_s, mgmt->da, mgmt->sa, mgmt->bssid,
category, payload, plen, freq);
if (wpa_s->ifmsh)
wpas_event_rx_mgmt_action(
wpa_s, data->rx_mgmt.frame,
data->rx_mgmt.frame_len,
- data->rx_mgmt.freq);
+ data->rx_mgmt.freq,
+ data->rx_mgmt.ssi_signal);
break;
}
wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
- /* IE body is made of bit flags, all initialized to 0 */
os_memset(pos, 0, 2 + rrm_ie_len);
*pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
*pos++ = rrm_ie_len;
+
+ /* Set supported capabilites flags */
+ if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
+ *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
+
wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
wpa_s->rrm.rrm_used = 1;
}
wpabuf_free(buf);
return 0;
}
+
+
+void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
+ const u8 *src,
+ const u8 *frame, size_t len,
+ int rssi)
+{
+ struct wpabuf *buf;
+ const struct rrm_link_measurement_request *req;
+ struct rrm_link_measurement_report report;
+
+ if (wpa_s->wpa_state != WPA_COMPLETED) {
+ wpa_printf(MSG_INFO,
+ "RRM: Ignoring link measurement request. Not associated");
+ return;
+ }
+
+ if (!wpa_s->rrm.rrm_used) {
+ wpa_printf(MSG_INFO,
+ "RRM: Ignoring link measurement request. Not RRM network");
+ return;
+ }
+
+ if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)) {
+ wpa_printf(MSG_INFO,
+ "RRM: Measurement report failed. TX power insertion not supported");
+ return;
+ }
+
+ req = (const struct rrm_link_measurement_request *) frame;
+ if (len < sizeof(*req)) {
+ wpa_printf(MSG_INFO,
+ "RRM: Link measurement report failed. Request too short");
+ return;
+ }
+
+ os_memset(&report, 0, sizeof(report));
+ report.tpc.eid = WLAN_EID_TPC_REPORT;
+ report.tpc.len = 2;
+ report.rsni = 255; /* 255 indicates that RSNI is not available */
+ report.dialog_token = req->dialog_token;
+
+ /*
+ * It's possible to estimate RCPI based on RSSI in dBm. This
+ * calculation will not reflect the correct value for high rates,
+ * but it's good enough for Action frames which are transmitted
+ * with up to 24 Mbps rates.
+ */
+ if (!rssi)
+ report.rcpi = 255; /* not available */
+ else if (rssi < -110)
+ report.rcpi = 0;
+ else if (rssi > 0)
+ report.rcpi = 220;
+ else
+ report.rcpi = (rssi + 110) * 2;
+
+ /* action_category + action_code */
+ buf = wpabuf_alloc(2 + sizeof(report));
+ if (buf == NULL) {
+ wpa_printf(MSG_ERROR,
+ "RRM: Link measurement report failed. Buffer allocation failed");
+ return;
+ }
+
+ wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
+ wpabuf_put_u8(buf, WLAN_RRM_LINK_MEASUREMENT_REPORT);
+ wpabuf_put_data(buf, &report, sizeof(report));
+ wpa_hexdump(MSG_DEBUG, "RRM: Link measurement report:",
+ wpabuf_head(buf), wpabuf_len(buf));
+
+ if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, src,
+ wpa_s->own_addr, wpa_s->bssid,
+ wpabuf_head(buf), wpabuf_len(buf), 0)) {
+ wpa_printf(MSG_ERROR,
+ "RRM: Link measurement report failed. Send action failed");
+ }
+ wpabuf_free(buf);
+}
void (*cb)(void *ctx,
struct wpabuf *neighbor_rep),
void *cb_ctx);
+void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
+ const u8 *src,
+ const u8 *frame, size_t len,
+ int rssi);
/**
* wpa_supplicant_ctrl_iface_ctrl_rsp_handle - Handle a control response