![Jouni Malinen](/assets/img/avatar_default.png)
This makes it easier to change the internal struct wpa_bss design for storing the variable length IE buffers. Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
1594 lines
42 KiB
C
1594 lines
42 KiB
C
/*
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* wpa_supplicant - Radio Measurements
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* Copyright (c) 2003-2016, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "common/ieee802_11_common.h"
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#include "wpa_supplicant_i.h"
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#include "driver_i.h"
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#include "bss.h"
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#include "scan.h"
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#include "p2p_supplicant.h"
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static void wpas_rrm_neighbor_rep_timeout_handler(void *data, void *user_ctx)
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{
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struct rrm_data *rrm = data;
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if (!rrm->notify_neighbor_rep) {
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wpa_printf(MSG_ERROR,
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"RRM: Unexpected neighbor report timeout");
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return;
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}
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wpa_printf(MSG_DEBUG, "RRM: Notifying neighbor report - NONE");
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rrm->notify_neighbor_rep(rrm->neighbor_rep_cb_ctx, NULL);
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rrm->notify_neighbor_rep = NULL;
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rrm->neighbor_rep_cb_ctx = NULL;
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}
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/*
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* wpas_rrm_reset - Clear and reset all RRM data in wpa_supplicant
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* @wpa_s: Pointer to wpa_supplicant
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*/
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void wpas_rrm_reset(struct wpa_supplicant *wpa_s)
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{
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wpa_s->rrm.rrm_used = 0;
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eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm,
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NULL);
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if (wpa_s->rrm.notify_neighbor_rep)
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wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
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wpa_s->rrm.next_neighbor_rep_token = 1;
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wpas_clear_beacon_rep_data(wpa_s);
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}
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/*
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* wpas_rrm_process_neighbor_rep - Handle incoming neighbor report
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* @wpa_s: Pointer to wpa_supplicant
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* @report: Neighbor report buffer, prefixed by a 1-byte dialog token
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* @report_len: Length of neighbor report buffer
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*/
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void wpas_rrm_process_neighbor_rep(struct wpa_supplicant *wpa_s,
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const u8 *report, size_t report_len)
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{
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struct wpabuf *neighbor_rep;
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wpa_hexdump(MSG_DEBUG, "RRM: New Neighbor Report", report, report_len);
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if (report_len < 1)
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return;
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if (report[0] != wpa_s->rrm.next_neighbor_rep_token - 1) {
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wpa_printf(MSG_DEBUG,
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"RRM: Discarding neighbor report with token %d (expected %d)",
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report[0], wpa_s->rrm.next_neighbor_rep_token - 1);
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return;
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}
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eloop_cancel_timeout(wpas_rrm_neighbor_rep_timeout_handler, &wpa_s->rrm,
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NULL);
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if (!wpa_s->rrm.notify_neighbor_rep) {
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wpa_msg(wpa_s, MSG_INFO, "RRM: Unexpected neighbor report");
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return;
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}
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/* skipping the first byte, which is only an id (dialog token) */
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neighbor_rep = wpabuf_alloc(report_len - 1);
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if (!neighbor_rep) {
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wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
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return;
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}
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wpabuf_put_data(neighbor_rep, report + 1, report_len - 1);
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wpa_dbg(wpa_s, MSG_DEBUG, "RRM: Notifying neighbor report (token = %d)",
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report[0]);
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wpa_s->rrm.notify_neighbor_rep(wpa_s->rrm.neighbor_rep_cb_ctx,
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neighbor_rep);
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wpa_s->rrm.notify_neighbor_rep = NULL;
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wpa_s->rrm.neighbor_rep_cb_ctx = NULL;
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}
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#if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
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/* Workaround different, undefined for Windows, error codes used here */
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#ifndef ENOTCONN
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#define ENOTCONN -1
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#endif
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#ifndef EOPNOTSUPP
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#define EOPNOTSUPP -1
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#endif
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#ifndef ECANCELED
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#define ECANCELED -1
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#endif
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#endif
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/* Measurement Request element + Location Subject + Maximum Age subelement */
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#define MEASURE_REQUEST_LCI_LEN (3 + 1 + 4)
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/* Measurement Request element + Location Civic Request */
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#define MEASURE_REQUEST_CIVIC_LEN (3 + 5)
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/**
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* wpas_rrm_send_neighbor_rep_request - Request a neighbor report from our AP
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* @wpa_s: Pointer to wpa_supplicant
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* @ssid: if not null, this is sent in the request. Otherwise, no SSID IE
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* is sent in the request.
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* @lci: if set, neighbor request will include LCI request
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* @civic: if set, neighbor request will include civic location request
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* @cb: Callback function to be called once the requested report arrives, or
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* timed out after RRM_NEIGHBOR_REPORT_TIMEOUT seconds.
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* In the former case, 'neighbor_rep' is a newly allocated wpabuf, and it's
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* the requester's responsibility to free it.
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* In the latter case NULL will be sent in 'neighbor_rep'.
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* @cb_ctx: Context value to send the callback function
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* Returns: 0 in case of success, negative error code otherwise
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*
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* In case there is a previous request which has not been answered yet, the
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* new request fails. The caller may retry after RRM_NEIGHBOR_REPORT_TIMEOUT.
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* Request must contain a callback function.
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*/
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int wpas_rrm_send_neighbor_rep_request(struct wpa_supplicant *wpa_s,
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const struct wpa_ssid_value *ssid,
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int lci, int civic,
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void (*cb)(void *ctx,
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struct wpabuf *neighbor_rep),
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void *cb_ctx)
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{
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struct wpabuf *buf;
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const u8 *rrm_ie;
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if (wpa_s->wpa_state != WPA_COMPLETED || wpa_s->current_ssid == NULL) {
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wpa_dbg(wpa_s, MSG_DEBUG, "RRM: No connection, no RRM.");
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return -ENOTCONN;
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}
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if (!wpa_s->rrm.rrm_used) {
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wpa_dbg(wpa_s, MSG_DEBUG, "RRM: No RRM in current connection.");
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return -EOPNOTSUPP;
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}
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rrm_ie = wpa_bss_get_ie(wpa_s->current_bss,
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WLAN_EID_RRM_ENABLED_CAPABILITIES);
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if (!rrm_ie || !(wpa_s->current_bss->caps & IEEE80211_CAP_RRM) ||
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!(rrm_ie[2] & WLAN_RRM_CAPS_NEIGHBOR_REPORT)) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"RRM: No network support for Neighbor Report.");
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return -EOPNOTSUPP;
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}
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/* Refuse if there's a live request */
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if (wpa_s->rrm.notify_neighbor_rep) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"RRM: Currently handling previous Neighbor Report.");
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return -EBUSY;
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}
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/* 3 = action category + action code + dialog token */
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buf = wpabuf_alloc(3 + (ssid ? 2 + ssid->ssid_len : 0) +
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(lci ? 2 + MEASURE_REQUEST_LCI_LEN : 0) +
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(civic ? 2 + MEASURE_REQUEST_CIVIC_LEN : 0));
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if (buf == NULL) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"RRM: Failed to allocate Neighbor Report Request");
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return -ENOMEM;
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}
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wpa_dbg(wpa_s, MSG_DEBUG,
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"RRM: Neighbor report request (for %s), token=%d",
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(ssid ? wpa_ssid_txt(ssid->ssid, ssid->ssid_len) : ""),
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wpa_s->rrm.next_neighbor_rep_token);
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wpabuf_put_u8(buf, WLAN_ACTION_RADIO_MEASUREMENT);
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wpabuf_put_u8(buf, WLAN_RRM_NEIGHBOR_REPORT_REQUEST);
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wpabuf_put_u8(buf, wpa_s->rrm.next_neighbor_rep_token);
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if (ssid) {
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wpabuf_put_u8(buf, WLAN_EID_SSID);
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wpabuf_put_u8(buf, ssid->ssid_len);
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wpabuf_put_data(buf, ssid->ssid, ssid->ssid_len);
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}
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if (lci) {
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/* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
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wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
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wpabuf_put_u8(buf, MEASURE_REQUEST_LCI_LEN);
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/*
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* Measurement token; nonzero number that is unique among the
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* Measurement Request elements in a particular frame.
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*/
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wpabuf_put_u8(buf, 1); /* Measurement Token */
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/*
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* Parallel, Enable, Request, and Report bits are 0, Duration is
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* reserved.
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*/
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wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
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wpabuf_put_u8(buf, MEASURE_TYPE_LCI); /* Measurement Type */
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/* IEEE P802.11-REVmc/D5.0 9.4.2.21.10 - LCI request */
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/* Location Subject */
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wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
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/* Optional Subelements */
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/*
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* IEEE P802.11-REVmc/D5.0 Figure 9-170
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* The Maximum Age subelement is required, otherwise the AP can
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* send only data that was determined after receiving the
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* request. Setting it here to unlimited age.
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*/
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wpabuf_put_u8(buf, LCI_REQ_SUBELEM_MAX_AGE);
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wpabuf_put_u8(buf, 2);
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wpabuf_put_le16(buf, 0xffff);
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}
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if (civic) {
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/* IEEE P802.11-REVmc/D5.0 9.4.2.21 */
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wpabuf_put_u8(buf, WLAN_EID_MEASURE_REQUEST);
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wpabuf_put_u8(buf, MEASURE_REQUEST_CIVIC_LEN);
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/*
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* Measurement token; nonzero number that is unique among the
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* Measurement Request elements in a particular frame.
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*/
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wpabuf_put_u8(buf, 2); /* Measurement Token */
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/*
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* Parallel, Enable, Request, and Report bits are 0, Duration is
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* reserved.
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*/
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wpabuf_put_u8(buf, 0); /* Measurement Request Mode */
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/* Measurement Type */
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wpabuf_put_u8(buf, MEASURE_TYPE_LOCATION_CIVIC);
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/* IEEE P802.11-REVmc/D5.0 9.4.2.21.14:
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* Location Civic request */
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/* Location Subject */
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wpabuf_put_u8(buf, LOCATION_SUBJECT_REMOTE);
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wpabuf_put_u8(buf, 0); /* Civic Location Type: IETF RFC 4776 */
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/* Location Service Interval Units: Seconds */
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wpabuf_put_u8(buf, 0);
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/* Location Service Interval: 0 - Only one report is requested
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*/
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wpabuf_put_le16(buf, 0);
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/* No optional subelements */
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}
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wpa_s->rrm.next_neighbor_rep_token++;
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if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"RRM: Failed to send Neighbor Report Request");
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wpabuf_free(buf);
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return -ECANCELED;
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}
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wpa_s->rrm.neighbor_rep_cb_ctx = cb_ctx;
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wpa_s->rrm.notify_neighbor_rep = cb;
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eloop_register_timeout(RRM_NEIGHBOR_REPORT_TIMEOUT, 0,
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wpas_rrm_neighbor_rep_timeout_handler,
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&wpa_s->rrm, NULL);
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wpabuf_free(buf);
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return 0;
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}
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static int wpas_rrm_report_elem(struct wpabuf **buf, u8 token, u8 mode, u8 type,
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const u8 *data, size_t data_len)
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{
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if (wpabuf_resize(buf, 5 + data_len))
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return -1;
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wpabuf_put_u8(*buf, WLAN_EID_MEASURE_REPORT);
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wpabuf_put_u8(*buf, 3 + data_len);
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wpabuf_put_u8(*buf, token);
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wpabuf_put_u8(*buf, mode);
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wpabuf_put_u8(*buf, type);
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if (data_len)
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wpabuf_put_data(*buf, data, data_len);
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return 0;
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}
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static int
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wpas_rrm_build_lci_report(struct wpa_supplicant *wpa_s,
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const struct rrm_measurement_request_element *req,
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struct wpabuf **buf)
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{
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u8 subject;
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u16 max_age = 0;
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struct os_reltime t, diff;
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unsigned long diff_l;
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const u8 *subelem;
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const u8 *request = req->variable;
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size_t len = req->len - 3;
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if (len < 1)
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return -1;
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if (!wpa_s->lci)
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goto reject;
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subject = *request++;
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len--;
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wpa_printf(MSG_DEBUG, "Measurement request location subject=%u",
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subject);
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if (subject != LOCATION_SUBJECT_REMOTE) {
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wpa_printf(MSG_INFO,
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"Not building LCI report - bad location subject");
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return 0;
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}
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/* Subelements are formatted exactly like elements */
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wpa_hexdump(MSG_DEBUG, "LCI request subelements", request, len);
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subelem = get_ie(request, len, LCI_REQ_SUBELEM_MAX_AGE);
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if (subelem && subelem[1] == 2)
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max_age = WPA_GET_LE16(subelem + 2);
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if (os_get_reltime(&t))
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goto reject;
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os_reltime_sub(&t, &wpa_s->lci_time, &diff);
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/* LCI age is calculated in 10th of a second units. */
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diff_l = diff.sec * 10 + diff.usec / 100000;
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if (max_age != 0xffff && max_age < diff_l)
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goto reject;
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if (wpas_rrm_report_elem(buf, req->token,
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MEASUREMENT_REPORT_MODE_ACCEPT, req->type,
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wpabuf_head_u8(wpa_s->lci),
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wpabuf_len(wpa_s->lci)) < 0) {
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wpa_printf(MSG_DEBUG, "Failed to add LCI report element");
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return -1;
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}
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return 0;
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reject:
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if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
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wpas_rrm_report_elem(buf, req->token,
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MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
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req->type, NULL, 0) < 0) {
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wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
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return -1;
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}
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return 0;
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}
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static void wpas_rrm_send_msr_report_mpdu(struct wpa_supplicant *wpa_s,
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const u8 *data, size_t len)
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{
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struct wpabuf *report = wpabuf_alloc(len + 3);
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if (!report)
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return;
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wpabuf_put_u8(report, WLAN_ACTION_RADIO_MEASUREMENT);
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wpabuf_put_u8(report, WLAN_RRM_RADIO_MEASUREMENT_REPORT);
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wpabuf_put_u8(report, wpa_s->rrm.token);
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wpabuf_put_data(report, data, len);
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if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
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wpa_s->own_addr, wpa_s->bssid,
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wpabuf_head(report), wpabuf_len(report), 0)) {
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wpa_printf(MSG_ERROR,
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"RRM: Radio measurement report failed: Sending Action frame failed");
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}
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wpabuf_free(report);
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}
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static int wpas_rrm_beacon_rep_update_last_frame(u8 *pos, size_t len)
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{
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struct rrm_measurement_report_element *msr_rep;
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u8 *end = pos + len;
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u8 *msr_rep_end;
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struct rrm_measurement_beacon_report *rep = NULL;
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u8 *subelem;
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/* Find the last beacon report element */
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while (end - pos >= (int) sizeof(*msr_rep)) {
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msr_rep = (struct rrm_measurement_report_element *) pos;
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msr_rep_end = pos + msr_rep->len + 2;
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if (msr_rep->eid != WLAN_EID_MEASURE_REPORT ||
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msr_rep_end > end) {
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/* Should not happen. This indicates a bug. */
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wpa_printf(MSG_ERROR,
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"RRM: non-measurement report element in measurement report frame");
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return -1;
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}
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if (msr_rep->type == MEASURE_TYPE_BEACON)
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rep = (struct rrm_measurement_beacon_report *)
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msr_rep->variable;
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pos += pos[1] + 2;
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}
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if (!rep)
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return 0;
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subelem = rep->variable;
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while (subelem + 2 < msr_rep_end &&
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subelem[0] != WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION)
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subelem += 2 + subelem[1];
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if (subelem + 2 < msr_rep_end &&
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subelem[0] == WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION &&
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subelem[1] == 1 &&
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subelem + BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN <= end)
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subelem[2] = 1;
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return 0;
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}
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|
|
|
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static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s,
|
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struct wpabuf *buf)
|
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{
|
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int len = wpabuf_len(buf);
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u8 *pos = wpabuf_mhead_u8(buf), *next = pos;
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|
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#define MPDU_REPORT_LEN (int) (IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN - 3)
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|
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while (len) {
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int send_len = (len > MPDU_REPORT_LEN) ? next - pos : len;
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|
|
if (send_len == len)
|
|
wpas_rrm_beacon_rep_update_last_frame(pos, len);
|
|
|
|
if (send_len == len ||
|
|
(send_len + next[1] + 2) > MPDU_REPORT_LEN) {
|
|
wpas_rrm_send_msr_report_mpdu(wpa_s, pos, send_len);
|
|
len -= send_len;
|
|
pos = next;
|
|
}
|
|
|
|
if (len)
|
|
next += next[1] + 2;
|
|
}
|
|
#undef MPDU_REPORT_LEN
|
|
}
|
|
|
|
|
|
static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels,
|
|
int *freqs)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < num_primary_channels; i++) {
|
|
u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4;
|
|
|
|
freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan);
|
|
/* ieee80211_chan_to_freq() is not really meant for this
|
|
* conversion of 20 MHz primary channel numbers for wider VHT
|
|
* channels, so handle those as special cases here for now. */
|
|
if (freqs[i] < 0 &&
|
|
(op_class == 128 || op_class == 129 || op_class == 130))
|
|
freqs[i] = 5000 + 5 * primary_chan;
|
|
if (freqs[i] < 0) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon Report: Invalid channel %u",
|
|
chan);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int * wpas_add_channels(const struct oper_class_map *op,
|
|
struct hostapd_hw_modes *mode, int active,
|
|
const u8 *channels, const u8 size)
|
|
{
|
|
int *freqs, *next_freq;
|
|
u8 num_primary_channels, i;
|
|
u8 num_chans;
|
|
|
|
num_chans = channels ? size :
|
|
(op->max_chan - op->min_chan) / op->inc + 1;
|
|
|
|
if (op->bw == BW80 || op->bw == BW80P80)
|
|
num_primary_channels = 4;
|
|
else if (op->bw == BW160)
|
|
num_primary_channels = 8;
|
|
else
|
|
num_primary_channels = 1;
|
|
|
|
/* one extra place for the zero-terminator */
|
|
freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs));
|
|
if (!freqs) {
|
|
wpa_printf(MSG_ERROR,
|
|
"Beacon Report: Failed to allocate freqs array");
|
|
return NULL;
|
|
}
|
|
|
|
next_freq = freqs;
|
|
for (i = 0; i < num_chans; i++) {
|
|
u8 chan = channels ? channels[i] : op->min_chan + i * op->inc;
|
|
enum chan_allowed res = verify_channel(mode, op->op_class, chan,
|
|
op->bw);
|
|
|
|
if (res == NOT_ALLOWED || (res == NO_IR && active))
|
|
continue;
|
|
|
|
if (wpas_add_channel(op->op_class, chan, num_primary_channels,
|
|
next_freq) < 0) {
|
|
os_free(freqs);
|
|
return NULL;
|
|
}
|
|
|
|
next_freq += num_primary_channels;
|
|
}
|
|
|
|
if (!freqs[0]) {
|
|
os_free(freqs);
|
|
return NULL;
|
|
}
|
|
|
|
return freqs;
|
|
}
|
|
|
|
|
|
static int * wpas_op_class_freqs(const struct oper_class_map *op,
|
|
struct hostapd_hw_modes *mode, int active)
|
|
{
|
|
u8 channels_80mhz_5ghz[] = { 42, 58, 106, 122, 138, 155 };
|
|
u8 channels_160mhz_5ghz[] = { 50, 114 };
|
|
u8 channels_80mhz_6ghz[] = { 7, 23, 39, 55, 71, 87, 103, 119, 135, 151,
|
|
167, 183, 199, 215 };
|
|
u8 channels_160mhz_6ghz[] = { 15, 47, 79, 111, 143, 175, 207 };
|
|
const u8 *channels = NULL;
|
|
size_t num_chan = 0;
|
|
int is_6ghz = is_6ghz_op_class(op->op_class);
|
|
|
|
/*
|
|
* When adding all channels in the operating class, 80 + 80 MHz
|
|
* operating classes are like 80 MHz channels because we add all valid
|
|
* channels anyway.
|
|
*/
|
|
if (op->bw == BW80 || op->bw == BW80P80) {
|
|
channels = is_6ghz ? channels_80mhz_6ghz : channels_80mhz_5ghz;
|
|
num_chan = is_6ghz ? ARRAY_SIZE(channels_80mhz_6ghz) :
|
|
ARRAY_SIZE(channels_80mhz_5ghz);
|
|
} else if (op->bw == BW160) {
|
|
channels = is_6ghz ? channels_160mhz_6ghz :
|
|
channels_160mhz_5ghz;
|
|
num_chan = is_6ghz ? ARRAY_SIZE(channels_160mhz_6ghz) :
|
|
ARRAY_SIZE(channels_160mhz_5ghz);
|
|
}
|
|
|
|
return wpas_add_channels(op, mode, active, channels, num_chan);
|
|
}
|
|
|
|
|
|
static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active,
|
|
const char *country, const u8 *subelems,
|
|
size_t len)
|
|
{
|
|
int *freqs = NULL, *new_freqs;
|
|
const u8 *end = subelems + len;
|
|
|
|
while (end - subelems > 2) {
|
|
const struct oper_class_map *op;
|
|
const u8 *ap_chan_elem, *pos;
|
|
u8 left;
|
|
struct hostapd_hw_modes *mode;
|
|
|
|
ap_chan_elem = get_ie(subelems, end - subelems,
|
|
WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL);
|
|
if (!ap_chan_elem)
|
|
break;
|
|
pos = ap_chan_elem + 2;
|
|
left = ap_chan_elem[1];
|
|
if (left < 1)
|
|
break;
|
|
subelems = ap_chan_elem + 2 + left;
|
|
|
|
op = get_oper_class(country, *pos);
|
|
if (!op) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon request: unknown operating class in AP Channel Report subelement %u",
|
|
*pos);
|
|
goto out;
|
|
}
|
|
pos++;
|
|
left--;
|
|
|
|
mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode,
|
|
is_6ghz_op_class(op->op_class));
|
|
if (!mode)
|
|
continue;
|
|
|
|
/*
|
|
* For 80 + 80 MHz operating classes, this AP Channel Report
|
|
* element should be followed by another element specifying
|
|
* the second 80 MHz channel. For now just add this 80 MHz
|
|
* channel, the second 80 MHz channel will be added when the
|
|
* next element is parsed.
|
|
* TODO: Verify that this AP Channel Report element is followed
|
|
* by a corresponding AP Channel Report element as specified in
|
|
* IEEE Std 802.11-2016, 11.11.9.1.
|
|
*/
|
|
new_freqs = wpas_add_channels(op, mode, active, pos, left);
|
|
if (new_freqs)
|
|
int_array_concat(&freqs, new_freqs);
|
|
|
|
os_free(new_freqs);
|
|
}
|
|
|
|
return freqs;
|
|
out:
|
|
os_free(freqs);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
|
|
u8 op_class, u8 chan, int active,
|
|
const u8 *subelems, size_t len)
|
|
{
|
|
int *freqs = NULL, *ext_freqs = NULL;
|
|
struct hostapd_hw_modes *mode;
|
|
const char *country = NULL;
|
|
const struct oper_class_map *op;
|
|
const u8 *elem;
|
|
|
|
if (!wpa_s->current_bss)
|
|
return NULL;
|
|
elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
|
|
if (elem && elem[1] >= 2)
|
|
country = (const char *) (elem + 2);
|
|
|
|
op = get_oper_class(country, op_class);
|
|
if (!op) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon request: invalid operating class %d",
|
|
op_class);
|
|
return NULL;
|
|
}
|
|
|
|
mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode,
|
|
is_6ghz_op_class(op->op_class));
|
|
if (!mode)
|
|
return NULL;
|
|
|
|
switch (chan) {
|
|
case 0:
|
|
freqs = wpas_op_class_freqs(op, mode, active);
|
|
if (!freqs)
|
|
return NULL;
|
|
break;
|
|
case 255:
|
|
/* freqs will be added from AP channel subelements */
|
|
break;
|
|
default:
|
|
freqs = wpas_add_channels(op, mode, active, &chan, 1);
|
|
if (!freqs)
|
|
return NULL;
|
|
break;
|
|
}
|
|
|
|
ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems,
|
|
len);
|
|
if (ext_freqs) {
|
|
int_array_concat(&freqs, ext_freqs);
|
|
os_free(ext_freqs);
|
|
int_array_sort_unique(freqs);
|
|
}
|
|
|
|
return freqs;
|
|
}
|
|
|
|
|
|
int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
|
|
u8 *op_class, u8 *chan, u8 *phy_type)
|
|
{
|
|
const u8 *ie;
|
|
int sec_chan = 0, vht = 0;
|
|
struct ieee80211_ht_operation *ht_oper = NULL;
|
|
struct ieee80211_vht_operation *vht_oper = NULL;
|
|
u8 seg0, seg1;
|
|
|
|
ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
|
|
if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
|
|
u8 sec_chan_offset;
|
|
|
|
ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
|
|
sec_chan_offset = ht_oper->ht_param &
|
|
HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
|
|
if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
|
|
sec_chan = 1;
|
|
else if (sec_chan_offset ==
|
|
HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
|
|
sec_chan = -1;
|
|
}
|
|
|
|
ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
|
|
if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
|
|
vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
|
|
|
|
switch (vht_oper->vht_op_info_chwidth) {
|
|
case 1:
|
|
seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
|
|
seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
|
|
if (seg1 && abs(seg1 - seg0) == 8)
|
|
vht = CHANWIDTH_160MHZ;
|
|
else if (seg1)
|
|
vht = CHANWIDTH_80P80MHZ;
|
|
else
|
|
vht = CHANWIDTH_80MHZ;
|
|
break;
|
|
case 2:
|
|
vht = CHANWIDTH_160MHZ;
|
|
break;
|
|
case 3:
|
|
vht = CHANWIDTH_80P80MHZ;
|
|
break;
|
|
default:
|
|
vht = CHANWIDTH_USE_HT;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
|
|
chan) == NUM_HOSTAPD_MODES) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Cannot determine operating class and channel");
|
|
return -1;
|
|
}
|
|
|
|
*phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
|
|
vht_oper != NULL);
|
|
if (*phy_type == PHY_TYPE_UNSPECIFIED) {
|
|
wpa_printf(MSG_DEBUG, "Cannot determine phy type");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
|
|
enum beacon_report_detail detail,
|
|
struct wpa_bss *bss, u8 *buf,
|
|
size_t buf_len, const u8 **ies_buf,
|
|
size_t *ie_len, int add_fixed)
|
|
{
|
|
const u8 *ies = *ies_buf;
|
|
size_t ies_len = *ie_len;
|
|
u8 *pos = buf;
|
|
int rem_len;
|
|
|
|
rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
|
|
sizeof(struct rrm_measurement_report_element) - 2 -
|
|
REPORTED_FRAME_BODY_SUBELEM_LEN;
|
|
|
|
if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon Request: Invalid reporting detail: %d",
|
|
detail);
|
|
return -1;
|
|
}
|
|
|
|
if (detail == BEACON_REPORT_DETAIL_NONE)
|
|
return 0;
|
|
|
|
/*
|
|
* Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
|
|
* beacon interval(2) + capabilities(2) = 14 bytes
|
|
*/
|
|
if (add_fixed && buf_len < 14)
|
|
return -1;
|
|
|
|
*pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
|
|
/* The length will be filled later */
|
|
pos++;
|
|
|
|
if (add_fixed) {
|
|
WPA_PUT_LE64(pos, bss->tsf);
|
|
pos += sizeof(bss->tsf);
|
|
WPA_PUT_LE16(pos, bss->beacon_int);
|
|
pos += 2;
|
|
WPA_PUT_LE16(pos, bss->caps);
|
|
pos += 2;
|
|
}
|
|
|
|
rem_len -= pos - buf;
|
|
|
|
/*
|
|
* According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
|
|
* body subelement causes the element to exceed the maximum element
|
|
* size, the subelement is truncated so that the last IE is a complete
|
|
* IE. So even when required to report all IEs, add elements one after
|
|
* the other and stop once there is no more room in the measurement
|
|
* element.
|
|
*/
|
|
while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
|
|
if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
|
|
(eids && bitfield_is_set(eids, ies[0]))) {
|
|
u8 elen = ies[1];
|
|
|
|
if (2 + elen > buf + buf_len - pos ||
|
|
2 + elen > rem_len)
|
|
break;
|
|
|
|
*pos++ = ies[0];
|
|
*pos++ = elen;
|
|
os_memcpy(pos, ies + 2, elen);
|
|
pos += elen;
|
|
rem_len -= 2 + elen;
|
|
}
|
|
|
|
ies_len -= 2 + ies[1];
|
|
ies += 2 + ies[1];
|
|
}
|
|
|
|
*ie_len = ies_len;
|
|
*ies_buf = ies;
|
|
|
|
/* Now the length is known */
|
|
buf[1] = pos - buf - 2;
|
|
return pos - buf;
|
|
}
|
|
|
|
|
|
static int wpas_add_beacon_rep_elem(struct beacon_rep_data *data,
|
|
struct wpa_bss *bss,
|
|
struct wpabuf **wpa_buf,
|
|
struct rrm_measurement_beacon_report *rep,
|
|
const u8 **ie, size_t *ie_len, u8 idx)
|
|
{
|
|
int ret;
|
|
u8 *buf, *pos;
|
|
u32 subelems_len = REPORTED_FRAME_BODY_SUBELEM_LEN +
|
|
(data->last_indication ?
|
|
BEACON_REPORT_LAST_INDICATION_SUBELEM_LEN : 0);
|
|
|
|
/* Maximum element length: Beacon Report element + Reported Frame Body
|
|
* subelement + all IEs of the reported Beacon frame + Reported Frame
|
|
* Body Fragment ID subelement */
|
|
buf = os_malloc(sizeof(*rep) + 14 + *ie_len + subelems_len);
|
|
if (!buf)
|
|
return -1;
|
|
|
|
os_memcpy(buf, rep, sizeof(*rep));
|
|
|
|
ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
|
|
bss, buf + sizeof(*rep),
|
|
14 + *ie_len, ie, ie_len,
|
|
idx == 0);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
pos = buf + ret + sizeof(*rep);
|
|
pos[0] = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY_FRAGMENT_ID;
|
|
pos[1] = 2;
|
|
|
|
/*
|
|
* Only one Beacon Report Measurement is supported at a time, so
|
|
* the Beacon Report ID can always be set to 1.
|
|
*/
|
|
pos[2] = 1;
|
|
|
|
/* Fragment ID Number (bits 0..6) and More Frame Body Fragments (bit 7)
|
|
*/
|
|
pos[3] = idx;
|
|
if (data->report_detail != BEACON_REPORT_DETAIL_NONE && *ie_len)
|
|
pos[3] |= REPORTED_FRAME_BODY_MORE_FRAGMENTS;
|
|
else
|
|
pos[3] &= ~REPORTED_FRAME_BODY_MORE_FRAGMENTS;
|
|
|
|
pos += REPORTED_FRAME_BODY_SUBELEM_LEN;
|
|
|
|
if (data->last_indication) {
|
|
pos[0] = WLAN_BEACON_REPORT_SUBELEM_LAST_INDICATION;
|
|
pos[1] = 1;
|
|
|
|
/* This field will be updated later if this is the last frame */
|
|
pos[2] = 0;
|
|
}
|
|
|
|
ret = wpas_rrm_report_elem(wpa_buf, data->token,
|
|
MEASUREMENT_REPORT_MODE_ACCEPT,
|
|
MEASURE_TYPE_BEACON, buf,
|
|
ret + sizeof(*rep) + subelems_len);
|
|
out:
|
|
os_free(buf);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
|
|
struct wpabuf **wpa_buf, struct wpa_bss *bss,
|
|
u64 start, u64 parent_tsf)
|
|
{
|
|
struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
|
|
const u8 *ies = wpa_bss_ie_ptr(bss);
|
|
const u8 *pos = ies;
|
|
size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
|
|
struct rrm_measurement_beacon_report rep;
|
|
u8 idx = 0;
|
|
|
|
if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
|
|
os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
|
|
return 0;
|
|
|
|
if (data->ssid_len &&
|
|
(data->ssid_len != bss->ssid_len ||
|
|
os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
|
|
return 0;
|
|
|
|
if (wpas_get_op_chan_phy(bss->freq, ies, ies_len, &rep.op_class,
|
|
&rep.channel, &rep.report_info) < 0)
|
|
return 0;
|
|
|
|
rep.start_time = host_to_le64(start);
|
|
rep.duration = host_to_le16(data->scan_params.duration);
|
|
rep.rcpi = rssi_to_rcpi(bss->level);
|
|
rep.rsni = 255; /* 255 indicates that RSNI is not available */
|
|
os_memcpy(rep.bssid, bss->bssid, ETH_ALEN);
|
|
rep.antenna_id = 0; /* unknown */
|
|
rep.parent_tsf = host_to_le32(parent_tsf);
|
|
|
|
do {
|
|
int ret;
|
|
|
|
ret = wpas_add_beacon_rep_elem(data, bss, wpa_buf, &rep,
|
|
&pos, &ies_len, idx++);
|
|
if (ret)
|
|
return ret;
|
|
} while (data->report_detail != BEACON_REPORT_DETAIL_NONE &&
|
|
ies_len >= 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
|
|
struct wpabuf **buf)
|
|
{
|
|
return wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
|
|
MEASUREMENT_REPORT_MODE_ACCEPT,
|
|
MEASURE_TYPE_BEACON, NULL, 0);
|
|
}
|
|
|
|
|
|
static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
|
|
struct wpabuf **buf)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < wpa_s->last_scan_res_used; i++) {
|
|
if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
|
|
0, 0) < 0)
|
|
break;
|
|
}
|
|
|
|
if (!(*buf))
|
|
wpas_beacon_rep_no_results(wpa_s, buf);
|
|
|
|
wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
|
|
}
|
|
|
|
|
|
void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
|
|
{
|
|
if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) {
|
|
struct wpabuf *buf = NULL;
|
|
|
|
if (wpas_rrm_report_elem(&buf, wpa_s->beacon_rep_data.token,
|
|
MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
|
|
MEASURE_TYPE_BEACON, NULL, 0)) {
|
|
wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
|
|
wpabuf_free(buf);
|
|
return;
|
|
}
|
|
|
|
wpas_rrm_send_msr_report(wpa_s, buf);
|
|
wpabuf_free(buf);
|
|
}
|
|
|
|
wpas_clear_beacon_rep_data(wpa_s);
|
|
}
|
|
|
|
|
|
static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
|
|
{
|
|
struct wpa_supplicant *wpa_s = eloop_ctx;
|
|
struct wpa_driver_scan_params *params =
|
|
&wpa_s->beacon_rep_data.scan_params;
|
|
u16 prev_duration = params->duration;
|
|
|
|
if (!wpa_s->current_bss)
|
|
return;
|
|
|
|
if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL) &&
|
|
params->duration) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Cannot set scan duration due to missing driver support");
|
|
params->duration = 0;
|
|
}
|
|
os_get_reltime(&wpa_s->beacon_rep_scan);
|
|
if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
|
|
wpa_supplicant_trigger_scan(wpa_s, params))
|
|
wpas_rrm_refuse_request(wpa_s);
|
|
params->duration = prev_duration;
|
|
}
|
|
|
|
|
|
static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
|
|
struct beacon_rep_data *data,
|
|
u8 sid, u8 slen, const u8 *subelem)
|
|
{
|
|
u8 report_info, i;
|
|
|
|
switch (sid) {
|
|
case WLAN_BEACON_REQUEST_SUBELEM_SSID:
|
|
if (!slen) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"SSID subelement with zero length - wildcard SSID");
|
|
break;
|
|
}
|
|
|
|
if (slen > SSID_MAX_LEN) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Invalid SSID subelement length: %u", slen);
|
|
return -1;
|
|
}
|
|
|
|
data->ssid_len = slen;
|
|
os_memcpy(data->ssid, subelem, data->ssid_len);
|
|
break;
|
|
case WLAN_BEACON_REQUEST_SUBELEM_INFO:
|
|
if (slen != 2) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Invalid reporting information subelement length: %u",
|
|
slen);
|
|
return -1;
|
|
}
|
|
|
|
report_info = subelem[0];
|
|
if (report_info != 0) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"reporting information=%u is not supported",
|
|
report_info);
|
|
return 0;
|
|
}
|
|
break;
|
|
case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
|
|
if (slen != 1) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Invalid reporting detail subelement length: %u",
|
|
slen);
|
|
return -1;
|
|
}
|
|
|
|
data->report_detail = subelem[0];
|
|
if (data->report_detail >
|
|
BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
|
|
wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
|
|
subelem[0]);
|
|
return -1;
|
|
}
|
|
|
|
break;
|
|
case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
|
|
if (data->report_detail !=
|
|
BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon request: request subelement is present but report detail is %u",
|
|
data->report_detail);
|
|
return -1;
|
|
}
|
|
|
|
if (!slen) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Invalid request subelement length: %u",
|
|
slen);
|
|
return -1;
|
|
}
|
|
|
|
if (data->eids) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon Request: Request subelement appears more than once");
|
|
return -1;
|
|
}
|
|
|
|
data->eids = bitfield_alloc(255);
|
|
if (!data->eids) {
|
|
wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < slen; i++)
|
|
bitfield_set(data->eids, subelem[i]);
|
|
break;
|
|
case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
|
|
/* Skip - it will be processed when freqs are added */
|
|
break;
|
|
case WLAN_BEACON_REQUEST_SUBELEM_LAST_INDICATION:
|
|
if (slen != 1) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon request: Invalid last indication request subelement length: %u",
|
|
slen);
|
|
return -1;
|
|
}
|
|
|
|
data->last_indication = subelem[0];
|
|
break;
|
|
default:
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon request: Unknown subelement id %u", sid);
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns 0 if the next element can be processed, 1 if some operation was
|
|
* triggered, and -1 if processing failed (i.e., the element is in invalid
|
|
* format or an internal error occurred).
|
|
*/
|
|
static int
|
|
wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
|
|
u8 elem_token, int duration_mandatory,
|
|
const struct rrm_measurement_beacon_request *req,
|
|
size_t len, struct wpabuf **buf)
|
|
{
|
|
struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
|
|
struct wpa_driver_scan_params *params = &data->scan_params;
|
|
const u8 *subelems;
|
|
size_t elems_len;
|
|
u16 rand_interval;
|
|
u32 interval_usec;
|
|
u32 _rand;
|
|
int ret = 0, res;
|
|
u8 reject_mode;
|
|
|
|
if (len < sizeof(*req))
|
|
return -1;
|
|
|
|
if (req->mode != BEACON_REPORT_MODE_PASSIVE &&
|
|
req->mode != BEACON_REPORT_MODE_ACTIVE &&
|
|
req->mode != BEACON_REPORT_MODE_TABLE)
|
|
return 0;
|
|
|
|
subelems = req->variable;
|
|
elems_len = len - sizeof(*req);
|
|
rand_interval = le_to_host16(req->rand_interval);
|
|
|
|
os_free(params->freqs);
|
|
os_memset(params, 0, sizeof(*params));
|
|
|
|
data->token = elem_token;
|
|
|
|
/* default reporting detail is all fixed length fields and all
|
|
* elements */
|
|
data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
|
|
os_memcpy(data->bssid, req->bssid, ETH_ALEN);
|
|
|
|
while (elems_len >= 2) {
|
|
if (subelems[1] > elems_len - 2) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"Beacon Request: Truncated subelement");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
res = wpas_rm_handle_beacon_req_subelem(
|
|
wpa_s, data, subelems[0], subelems[1], &subelems[2]);
|
|
if (res < 0) {
|
|
ret = res;
|
|
goto out;
|
|
} else if (!res) {
|
|
reject_mode = MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE;
|
|
goto out_reject;
|
|
}
|
|
|
|
elems_len -= 2 + subelems[1];
|
|
subelems += 2 + subelems[1];
|
|
}
|
|
|
|
if (req->mode == BEACON_REPORT_MODE_TABLE) {
|
|
wpas_beacon_rep_table(wpa_s, buf);
|
|
goto out;
|
|
}
|
|
|
|
params->freqs = wpas_beacon_request_freqs(
|
|
wpa_s, req->oper_class, req->channel,
|
|
req->mode == BEACON_REPORT_MODE_ACTIVE,
|
|
req->variable, len - sizeof(*req));
|
|
if (!params->freqs) {
|
|
wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
|
|
reject_mode = MEASUREMENT_REPORT_MODE_REJECT_REFUSED;
|
|
goto out_reject;
|
|
}
|
|
|
|
params->duration = le_to_host16(req->duration);
|
|
params->duration_mandatory = duration_mandatory;
|
|
if (!params->duration) {
|
|
wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
params->only_new_results = 1;
|
|
|
|
if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
|
|
params->ssids[params->num_ssids].ssid = data->ssid;
|
|
params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
|
|
}
|
|
|
|
if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
|
|
_rand = os_random();
|
|
interval_usec = (_rand % (rand_interval + 1)) * 1024;
|
|
eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
|
|
NULL);
|
|
return 1;
|
|
out_reject:
|
|
if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
|
|
wpas_rrm_report_elem(buf, elem_token, reject_mode,
|
|
MEASURE_TYPE_BEACON, NULL, 0) < 0) {
|
|
wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
|
|
ret = -1;
|
|
}
|
|
out:
|
|
wpas_clear_beacon_rep_data(wpa_s);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int
|
|
wpas_rrm_handle_msr_req_element(
|
|
struct wpa_supplicant *wpa_s,
|
|
const struct rrm_measurement_request_element *req,
|
|
struct wpabuf **buf)
|
|
{
|
|
int duration_mandatory;
|
|
|
|
wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
|
|
req->type, req->token);
|
|
|
|
if (req->mode & MEASUREMENT_REQUEST_MODE_ENABLE) {
|
|
/* Enable bit is not supported for now */
|
|
wpa_printf(MSG_DEBUG, "RRM: Enable bit not supported, ignore");
|
|
return 0;
|
|
}
|
|
|
|
if ((req->mode & MEASUREMENT_REQUEST_MODE_PARALLEL) &&
|
|
req->type > MEASURE_TYPE_RPI_HIST) {
|
|
/* Parallel measurements are not supported for now */
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Parallel measurements are not supported, reject");
|
|
goto reject;
|
|
}
|
|
|
|
duration_mandatory =
|
|
!!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);
|
|
|
|
switch (req->type) {
|
|
case MEASURE_TYPE_LCI:
|
|
return wpas_rrm_build_lci_report(wpa_s, req, buf);
|
|
case MEASURE_TYPE_BEACON:
|
|
if (duration_mandatory &&
|
|
!(wpa_s->drv_rrm_flags &
|
|
WPA_DRIVER_FLAGS_SUPPORT_SET_SCAN_DWELL)) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Driver does not support dwell time configuration - reject beacon report with mandatory duration");
|
|
goto reject;
|
|
}
|
|
return wpas_rm_handle_beacon_req(wpa_s, req->token,
|
|
duration_mandatory,
|
|
(const void *) req->variable,
|
|
req->len - 3, buf);
|
|
default:
|
|
wpa_printf(MSG_INFO,
|
|
"RRM: Unsupported radio measurement type %u",
|
|
req->type);
|
|
break;
|
|
}
|
|
|
|
reject:
|
|
if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr) &&
|
|
wpas_rrm_report_elem(buf, req->token,
|
|
MEASUREMENT_REPORT_MODE_REJECT_INCAPABLE,
|
|
req->type, NULL, 0) < 0) {
|
|
wpa_printf(MSG_DEBUG, "RRM: Failed to add report element");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct wpabuf *
|
|
wpas_rrm_process_msr_req_elems(struct wpa_supplicant *wpa_s, const u8 *pos,
|
|
size_t len)
|
|
{
|
|
struct wpabuf *buf = NULL;
|
|
|
|
while (len) {
|
|
const struct rrm_measurement_request_element *req;
|
|
int res;
|
|
|
|
if (len < 2) {
|
|
wpa_printf(MSG_DEBUG, "RRM: Truncated element");
|
|
goto out;
|
|
}
|
|
|
|
req = (const struct rrm_measurement_request_element *) pos;
|
|
if (req->eid != WLAN_EID_MEASURE_REQUEST) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Expected Measurement Request element, but EID is %u",
|
|
req->eid);
|
|
goto out;
|
|
}
|
|
|
|
if (req->len < 3) {
|
|
wpa_printf(MSG_DEBUG, "RRM: Element length too short");
|
|
goto out;
|
|
}
|
|
|
|
if (req->len > len - 2) {
|
|
wpa_printf(MSG_DEBUG, "RRM: Element length too long");
|
|
goto out;
|
|
}
|
|
|
|
res = wpas_rrm_handle_msr_req_element(wpa_s, req, &buf);
|
|
if (res < 0)
|
|
goto out;
|
|
|
|
pos += req->len + 2;
|
|
len -= req->len + 2;
|
|
}
|
|
|
|
return buf;
|
|
|
|
out:
|
|
wpabuf_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void wpas_rrm_handle_radio_measurement_request(struct wpa_supplicant *wpa_s,
|
|
const u8 *src, const u8 *dst,
|
|
const u8 *frame, size_t len)
|
|
{
|
|
struct wpabuf *report;
|
|
|
|
if (wpa_s->wpa_state != WPA_COMPLETED) {
|
|
wpa_printf(MSG_INFO,
|
|
"RRM: Ignoring radio measurement request: Not associated");
|
|
return;
|
|
}
|
|
|
|
if (!wpa_s->rrm.rrm_used) {
|
|
wpa_printf(MSG_INFO,
|
|
"RRM: Ignoring radio measurement request: Not RRM network");
|
|
return;
|
|
}
|
|
|
|
if (len < 3) {
|
|
wpa_printf(MSG_INFO,
|
|
"RRM: Ignoring too short radio measurement request");
|
|
return;
|
|
}
|
|
|
|
wpa_s->rrm.token = *frame;
|
|
os_memcpy(wpa_s->rrm.dst_addr, dst, ETH_ALEN);
|
|
|
|
/* Number of repetitions is not supported */
|
|
|
|
report = wpas_rrm_process_msr_req_elems(wpa_s, frame + 3, len - 3);
|
|
if (!report)
|
|
return;
|
|
|
|
wpas_rrm_send_msr_report(wpa_s, report);
|
|
wpabuf_free(report);
|
|
}
|
|
|
|
|
|
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.dialog_token = req->dialog_token;
|
|
report.tpc.eid = WLAN_EID_TPC_REPORT;
|
|
report.tpc.len = 2;
|
|
/* Note: The driver is expected to update report.tpc.tx_power and
|
|
* report.tpc.link_margin subfields when sending out this frame.
|
|
* Similarly, the driver would need to update report.rx_ant_id and
|
|
* report.tx_ant_id subfields. */
|
|
report.rsni = 255; /* 255 indicates that RSNI is not available */
|
|
report.rcpi = rssi_to_rcpi(rssi);
|
|
|
|
/* 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_buf(MSG_DEBUG, "RRM: Link measurement report", 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);
|
|
}
|
|
|
|
|
|
int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
|
|
struct wpa_scan_results *scan_res,
|
|
struct scan_info *info)
|
|
{
|
|
size_t i = 0;
|
|
struct wpabuf *buf = NULL;
|
|
|
|
if (!wpa_s->beacon_rep_data.token)
|
|
return 0;
|
|
|
|
if (!wpa_s->current_bss)
|
|
goto out;
|
|
|
|
/* If the measurement was aborted, don't report partial results */
|
|
if (info->aborted)
|
|
goto out;
|
|
|
|
wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
|
|
MAC2STR(info->scan_start_tsf_bssid),
|
|
MAC2STR(wpa_s->current_bss->bssid));
|
|
if ((wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
|
|
os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
|
|
ETH_ALEN) != 0) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Ignore scan results due to mismatching TSF BSSID");
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < scan_res->num; i++) {
|
|
struct wpa_bss *bss =
|
|
wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);
|
|
|
|
if (!bss)
|
|
continue;
|
|
|
|
if ((wpa_s->drv_rrm_flags &
|
|
WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT) &&
|
|
os_memcmp(scan_res->res[i]->tsf_bssid,
|
|
wpa_s->current_bss->bssid, ETH_ALEN) != 0) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Ignore scan result for " MACSTR
|
|
" due to mismatching TSF BSSID" MACSTR,
|
|
MAC2STR(scan_res->res[i]->bssid),
|
|
MAC2STR(scan_res->res[i]->tsf_bssid));
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Don't report results that were not received during the
|
|
* current measurement.
|
|
*/
|
|
if (!(wpa_s->drv_rrm_flags &
|
|
WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)) {
|
|
struct os_reltime update_time, diff;
|
|
|
|
/* For now, allow 8 ms older results due to some
|
|
* unknown issue with cfg80211 BSS table updates during
|
|
* a scan with the current BSS.
|
|
* TODO: Fix this more properly to avoid having to have
|
|
* this type of hacks in place. */
|
|
calculate_update_time(&scan_res->fetch_time,
|
|
scan_res->res[i]->age,
|
|
&update_time);
|
|
os_reltime_sub(&wpa_s->beacon_rep_scan,
|
|
&update_time, &diff);
|
|
if (os_reltime_before(&update_time,
|
|
&wpa_s->beacon_rep_scan) &&
|
|
(diff.sec || diff.usec >= 8000)) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"RRM: Ignore scan result for " MACSTR
|
|
" due to old update (age(ms) %u, calculated age %u.%06u seconds)",
|
|
MAC2STR(scan_res->res[i]->bssid),
|
|
scan_res->res[i]->age,
|
|
(unsigned int) diff.sec,
|
|
(unsigned int) diff.usec);
|
|
continue;
|
|
}
|
|
} else if (info->scan_start_tsf >
|
|
scan_res->res[i]->parent_tsf) {
|
|
continue;
|
|
}
|
|
|
|
if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
|
|
scan_res->res[i]->parent_tsf) < 0)
|
|
break;
|
|
}
|
|
|
|
if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
|
|
goto out;
|
|
|
|
wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);
|
|
|
|
wpas_rrm_send_msr_report(wpa_s, buf);
|
|
wpabuf_free(buf);
|
|
|
|
out:
|
|
wpas_clear_beacon_rep_data(wpa_s);
|
|
return 1;
|
|
}
|
|
|
|
|
|
void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
|
|
{
|
|
struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
|
|
|
|
eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
|
|
bitfield_free(data->eids);
|
|
os_free(data->scan_params.freqs);
|
|
os_memset(data, 0, sizeof(*data));
|
|
}
|