--- /dev/null
+/*
+ * wpa_supplicant - WNM
+ * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "common/ieee802_11_defs.h"
+#include "common/ieee802_11_common.h"
+#include "common/wpa_ctrl.h"
+#include "rsn_supp/wpa.h"
+#include "wpa_supplicant_i.h"
+#include "driver_i.h"
+#include "scan.h"
+#include "ctrl_iface.h"
+#include "bss.h"
+#include "wnm_sta.h"
+#include "hs20_supplicant.h"
+
+#define MAX_TFS_IE_LEN 1024
+#define WNM_MAX_NEIGHBOR_REPORT 10
+
+#define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */
+
+/* get the TFS IE from driver */
+static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
+ u16 *buf_len, enum wnm_oper oper)
+{
+ wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
+
+ return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
+}
+
+
+/* set the TFS IE to driver */
+static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
+ const u8 *addr, const u8 *buf, u16 buf_len,
+ enum wnm_oper oper)
+{
+ u16 len = buf_len;
+
+ wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
+
+ return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
+}
+
+
+/* MLME-SLEEPMODE.request */
+int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
+ u8 action, u16 intval, struct wpabuf *tfs_req)
+{
+ struct ieee80211_mgmt *mgmt;
+ int res;
+ size_t len;
+ struct wnm_sleep_element *wnmsleep_ie;
+ u8 *wnmtfs_ie;
+ u8 wnmsleep_ie_len;
+ u16 wnmtfs_ie_len; /* possibly multiple IE(s) */
+ enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
+ WNM_SLEEP_TFS_REQ_IE_NONE;
+
+ wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
+ "action=%s to " MACSTR,
+ action == 0 ? "enter" : "exit",
+ MAC2STR(wpa_s->bssid));
+
+ /* WNM-Sleep Mode IE */
+ wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
+ wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
+ if (wnmsleep_ie == NULL)
+ return -1;
+ wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
+ wnmsleep_ie->len = wnmsleep_ie_len - 2;
+ wnmsleep_ie->action_type = action;
+ wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
+ wnmsleep_ie->intval = host_to_le16(intval);
+ wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
+ (u8 *) wnmsleep_ie, wnmsleep_ie_len);
+
+ /* TFS IE(s) */
+ if (tfs_req) {
+ wnmtfs_ie_len = wpabuf_len(tfs_req);
+ wnmtfs_ie = os_malloc(wnmtfs_ie_len);
+ if (wnmtfs_ie == NULL) {
+ os_free(wnmsleep_ie);
+ return -1;
+ }
+ os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
+ } else {
+ wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
+ if (wnmtfs_ie == NULL) {
+ os_free(wnmsleep_ie);
+ return -1;
+ }
+ if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
+ tfs_oper)) {
+ wnmtfs_ie_len = 0;
+ os_free(wnmtfs_ie);
+ wnmtfs_ie = NULL;
+ }
+ }
+ wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
+ (u8 *) wnmtfs_ie, wnmtfs_ie_len);
+
+ mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
+ if (mgmt == NULL) {
+ wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
+ "WNM-Sleep Request action frame");
+ os_free(wnmsleep_ie);
+ os_free(wnmtfs_ie);
+ return -1;
+ }
+
+ os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
+ os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
+ os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
+ mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+ WLAN_FC_STYPE_ACTION);
+ mgmt->u.action.category = WLAN_ACTION_WNM;
+ mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
+ mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
+ os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
+ wnmsleep_ie_len);
+ /* copy TFS IE here */
+ if (wnmtfs_ie_len > 0) {
+ os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
+ wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
+ }
+
+ len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
+ wnmtfs_ie_len;
+
+ res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
+ wpa_s->own_addr, wpa_s->bssid,
+ &mgmt->u.action.category, len, 0);
+ if (res < 0)
+ wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
+ "(action=%d, intval=%d)", action, intval);
+ else
+ wpa_s->wnmsleep_used = 1;
+
+ os_free(wnmsleep_ie);
+ os_free(wnmtfs_ie);
+ os_free(mgmt);
+
+ return res;
+}
+
+
+static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
+ const u8 *tfsresp_ie_start,
+ const u8 *tfsresp_ie_end)
+{
+ wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
+ wpa_s->bssid, NULL, NULL);
+ /* remove GTK/IGTK ?? */
+
+ /* set the TFS Resp IE(s) */
+ if (tfsresp_ie_start && tfsresp_ie_end &&
+ tfsresp_ie_end - tfsresp_ie_start >= 0) {
+ u16 tfsresp_ie_len;
+ tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
+ tfsresp_ie_start;
+ wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
+ /* pass the TFS Resp IE(s) to driver for processing */
+ if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
+ tfsresp_ie_start,
+ tfsresp_ie_len,
+ WNM_SLEEP_TFS_RESP_IE_SET))
+ wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
+ }
+}
+
+
+static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
+ const u8 *frm, u16 key_len_total)
+{
+ u8 *ptr, *end;
+ u8 gtk_len;
+
+ wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM, wpa_s->bssid,
+ NULL, NULL);
+
+ /* Install GTK/IGTK */
+
+ /* point to key data field */
+ ptr = (u8 *) frm + 1 + 2;
+ end = ptr + key_len_total;
+ wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
+
+ if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
+ wpa_msg(wpa_s, MSG_INFO,
+ "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
+ return;
+ }
+
+ while (end - ptr > 1) {
+ if (2 + ptr[1] > end - ptr) {
+ wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
+ "length");
+ if (end > ptr) {
+ wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
+ ptr, end - ptr);
+ }
+ break;
+ }
+ if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
+ if (ptr[1] < 11 + 5) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
+ "subelem");
+ break;
+ }
+ gtk_len = *(ptr + 4);
+ if (ptr[1] < 11 + gtk_len ||
+ gtk_len < 5 || gtk_len > 32) {
+ wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
+ "subelem");
+ break;
+ }
+ wpa_wnmsleep_install_key(
+ wpa_s->wpa,
+ WNM_SLEEP_SUBELEM_GTK,
+ ptr);
+ ptr += 13 + gtk_len;
+#ifdef CONFIG_IEEE80211W
+ } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
+ if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
+ "subelem");
+ break;
+ }
+ wpa_wnmsleep_install_key(wpa_s->wpa,
+ WNM_SLEEP_SUBELEM_IGTK, ptr);
+ ptr += 10 + WPA_IGTK_LEN;
+#endif /* CONFIG_IEEE80211W */
+ } else
+ break; /* skip the loop */
+ }
+}
+
+
+static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
+ const u8 *frm, int len)
+{
+ /*
+ * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
+ * WNM-Sleep Mode IE | TFS Response IE
+ */
+ const u8 *pos = frm; /* point to payload after the action field */
+ u16 key_len_total;
+ struct wnm_sleep_element *wnmsleep_ie = NULL;
+ /* multiple TFS Resp IE (assuming consecutive) */
+ const u8 *tfsresp_ie_start = NULL;
+ const u8 *tfsresp_ie_end = NULL;
+ size_t left;
+
+ if (!wpa_s->wnmsleep_used) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode has not been used in this association");
+ return;
+ }
+
+ if (len < 3)
+ return;
+ key_len_total = WPA_GET_LE16(frm + 1);
+
+ wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
+ frm[0], key_len_total);
+ left = len - 3;
+ if (key_len_total > left) {
+ wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
+ return;
+ }
+ pos += 3 + key_len_total;
+ while (pos - frm + 1 < len) {
+ u8 ie_len = *(pos + 1);
+ if (2 + ie_len > frm + len - pos) {
+ wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
+ break;
+ }
+ wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
+ if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
+ wnmsleep_ie = (struct wnm_sleep_element *) pos;
+ else if (*pos == WLAN_EID_TFS_RESP) {
+ if (!tfsresp_ie_start)
+ tfsresp_ie_start = pos;
+ tfsresp_ie_end = pos;
+ } else
+ wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
+ pos += ie_len + 2;
+ }
+
+ if (!wnmsleep_ie) {
+ wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
+ return;
+ }
+
+ if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
+ wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
+ wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
+ "frame (action=%d, intval=%d)",
+ wnmsleep_ie->action_type, wnmsleep_ie->intval);
+ if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
+ wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
+ tfsresp_ie_end);
+ } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
+ wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
+ }
+ } else {
+ wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
+ "(action=%d, intval=%d)",
+ wnmsleep_ie->action_type, wnmsleep_ie->intval);
+ if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
+ wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
+ wpa_s->bssid, NULL, NULL);
+ else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
+ wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
+ wpa_s->bssid, NULL, NULL);
+ }
+}
+
+
+void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
+{
+ int i;
+
+ for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
+ os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
+ os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
+ }
+
+ wpa_s->wnm_num_neighbor_report = 0;
+ os_free(wpa_s->wnm_neighbor_report_elements);
+ wpa_s->wnm_neighbor_report_elements = NULL;
+}
+
+
+static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
+ u8 id, u8 elen, const u8 *pos)
+{
+ switch (id) {
+ case WNM_NEIGHBOR_TSF:
+ if (elen < 2 + 2) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
+ break;
+ }
+ rep->tsf_offset = WPA_GET_LE16(pos);
+ rep->beacon_int = WPA_GET_LE16(pos + 2);
+ rep->tsf_present = 1;
+ break;
+ case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
+ if (elen < 2) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
+ "country string");
+ break;
+ }
+ os_memcpy(rep->country, pos, 2);
+ rep->country_present = 1;
+ break;
+ case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
+ if (elen < 1) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
+ "candidate");
+ break;
+ }
+ rep->preference = pos[0];
+ rep->preference_present = 1;
+ break;
+ case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
+ rep->bss_term_tsf = WPA_GET_LE64(pos);
+ rep->bss_term_dur = WPA_GET_LE16(pos + 8);
+ rep->bss_term_present = 1;
+ break;
+ case WNM_NEIGHBOR_BEARING:
+ if (elen < 8) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
+ "bearing");
+ break;
+ }
+ rep->bearing = WPA_GET_LE16(pos);
+ rep->distance = WPA_GET_LE32(pos + 2);
+ rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
+ rep->bearing_present = 1;
+ break;
+ case WNM_NEIGHBOR_MEASUREMENT_PILOT:
+ if (elen < 1) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
+ "pilot");
+ break;
+ }
+ os_free(rep->meas_pilot);
+ rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
+ if (rep->meas_pilot == NULL)
+ break;
+ rep->meas_pilot->measurement_pilot = pos[0];
+ rep->meas_pilot->subelem_len = elen - 1;
+ os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
+ break;
+ case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
+ if (elen < 5) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
+ "capabilities");
+ break;
+ }
+ os_memcpy(rep->rm_capab, pos, 5);
+ rep->rm_capab_present = 1;
+ break;
+ case WNM_NEIGHBOR_MULTIPLE_BSSID:
+ if (elen < 1) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
+ break;
+ }
+ os_free(rep->mul_bssid);
+ rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
+ if (rep->mul_bssid == NULL)
+ break;
+ rep->mul_bssid->max_bssid_indicator = pos[0];
+ rep->mul_bssid->subelem_len = elen - 1;
+ os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
+ break;
+ }
+}
+
+
+static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
+{
+ struct wpa_bss *bss = wpa_s->current_bss;
+ const char *country = NULL;
+ int freq;
+
+ if (bss) {
+ const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
+
+ if (elem && elem[1] >= 2)
+ country = (const char *) (elem + 2);
+ }
+
+ freq = ieee80211_chan_to_freq(country, op_class, chan);
+ if (freq <= 0 && op_class == 0) {
+ /*
+ * Some APs do not advertise correct operating class
+ * information. Try to determine the most likely operating
+ * frequency based on the channel number.
+ */
+ if (chan >= 1 && chan <= 13)
+ freq = 2407 + chan * 5;
+ else if (chan == 14)
+ freq = 2484;
+ else if (chan >= 36 && chan <= 169)
+ freq = 5000 + chan * 5;
+ }
+ return freq;
+}
+
+
+static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
+ const u8 *pos, u8 len,
+ struct neighbor_report *rep)
+{
+ u8 left = len;
+
+ if (left < 13) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
+ return;
+ }
+
+ os_memcpy(rep->bssid, pos, ETH_ALEN);
+ rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
+ rep->regulatory_class = *(pos + 10);
+ rep->channel_number = *(pos + 11);
+ rep->phy_type = *(pos + 12);
+
+ pos += 13;
+ left -= 13;
+
+ while (left >= 2) {
+ u8 id, elen;
+
+ id = *pos++;
+ elen = *pos++;
+ wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
+ left -= 2;
+ if (elen > left) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Truncated neighbor report subelement");
+ break;
+ }
+ wnm_parse_neighbor_report_elem(rep, id, elen, pos);
+ left -= elen;
+ pos += elen;
+ }
+
+ rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
+ rep->channel_number);
+}
+
+
+static struct wpa_bss *
+compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs)
+{
+
+ u8 i;
+ struct wpa_bss *bss = wpa_s->current_bss;
+ struct wpa_bss *target;
+
+ if (!bss)
+ return NULL;
+
+ wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
+ MAC2STR(wpa_s->bssid), bss->level);
+
+ for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
+ struct neighbor_report *nei;
+
+ nei = &wpa_s->wnm_neighbor_report_elements[i];
+ if (nei->preference_present && nei->preference == 0) {
+ wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
+ MAC2STR(nei->bssid));
+ continue;
+ }
+
+ target = wpa_bss_get_bssid(wpa_s, nei->bssid);
+ if (!target) {
+ wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
+ " (pref %d) not found in scan results",
+ MAC2STR(nei->bssid),
+ nei->preference_present ? nei->preference :
+ -1);
+ continue;
+ }
+
+ if (age_secs) {
+ struct os_reltime now;
+
+ if (os_get_reltime(&now) == 0 &&
+ os_reltime_expired(&now, &target->last_update,
+ age_secs)) {
+ wpa_printf(MSG_DEBUG,
+ "Candidate BSS is more than %ld seconds old",
+ age_secs);
+ continue;
+ }
+ }
+
+ if (bss->ssid_len != target->ssid_len ||
+ os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
+ /*
+ * TODO: Could consider allowing transition to another
+ * ESS if PMF was enabled for the association.
+ */
+ wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
+ " (pref %d) in different ESS",
+ MAC2STR(nei->bssid),
+ nei->preference_present ? nei->preference :
+ -1);
+ continue;
+ }
+
+ if (wpa_s->current_ssid &&
+ !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
+ 1)) {
+ wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
+ " (pref %d) does not match the current network profile",
+ MAC2STR(nei->bssid),
+ nei->preference_present ? nei->preference :
+ -1);
+ continue;
+ }
+
+ if (wpa_is_bss_tmp_disallowed(wpa_s, target->bssid)) {
+ wpa_printf(MSG_DEBUG,
+ "MBO: Candidate BSS " MACSTR
+ " retry delay is not over yet",
+ MAC2STR(nei->bssid));
+ continue;
+ }
+
+ if (target->level < bss->level && target->level < -80) {
+ wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
+ " (pref %d) does not have sufficient signal level (%d)",
+ MAC2STR(nei->bssid),
+ nei->preference_present ? nei->preference :
+ -1,
+ target->level);
+ continue;
+ }
+
+ wpa_printf(MSG_DEBUG,
+ "WNM: Found an acceptable preferred transition candidate BSS "
+ MACSTR " (RSSI %d)",
+ MAC2STR(nei->bssid), target->level);
+ return target;
+ }
+
+ return NULL;
+}
+
+
+static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
+{
+ const u8 *ie_a, *ie_b;
+
+ if (!a || !b)
+ return 0;
+
+ ie_a = wpa_bss_get_ie(a, eid);
+ ie_b = wpa_bss_get_ie(b, eid);
+
+ if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
+ return 0;
+
+ return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
+}
+
+
+static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
+{
+ u32 info = 0;
+
+ info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
+
+ /*
+ * Leave the security and key scope bits unset to indicate that the
+ * security information is not available.
+ */
+
+ if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
+ info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
+ if (bss->caps & WLAN_CAPABILITY_QOS)
+ info |= NEI_REP_BSSID_INFO_QOS;
+ if (bss->caps & WLAN_CAPABILITY_APSD)
+ info |= NEI_REP_BSSID_INFO_APSD;
+ if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
+ info |= NEI_REP_BSSID_INFO_RM;
+ if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
+ info |= NEI_REP_BSSID_INFO_DELAYED_BA;
+ if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
+ info |= NEI_REP_BSSID_INFO_IMM_BA;
+ if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
+ info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
+ if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
+ info |= NEI_REP_BSSID_INFO_HT;
+
+ return info;
+}
+
+
+static int wnm_add_nei_rep(u8 *buf, size_t len, const u8 *bssid, u32 bss_info,
+ u8 op_class, u8 chan, u8 phy_type, u8 pref)
+{
+ u8 *pos = buf;
+
+ if (len < 18) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Not enough room for Neighbor Report element");
+ return -1;
+ }
+
+ *pos++ = WLAN_EID_NEIGHBOR_REPORT;
+ /* length: 13 for basic neighbor report + 3 for preference subelement */
+ *pos++ = 16;
+ os_memcpy(pos, bssid, ETH_ALEN);
+ pos += ETH_ALEN;
+ WPA_PUT_LE32(pos, bss_info);
+ pos += 4;
+ *pos++ = op_class;
+ *pos++ = chan;
+ *pos++ = phy_type;
+ *pos++ = WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE;
+ *pos++ = 1;
+ *pos++ = pref;
+ return pos - buf;
+}
+
+
+static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
+ struct wpa_bss *bss, u8 *buf, size_t len,
+ u8 pref)
+{
+ const u8 *ie;
+ u8 op_class, chan;
+ int sec_chan = 0, vht = 0;
+ enum phy_type phy_type;
+ u32 info;
+ struct ieee80211_ht_operation *ht_oper = NULL;
+ struct ieee80211_vht_operation *vht_oper = NULL;
+
+ ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
+ if (ie && ie[1] >= 2) {
+ ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
+
+ if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
+ sec_chan = 1;
+ else if (ht_oper->ht_param &
+ HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
+ sec_chan = -1;
+ }
+
+ ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
+ if (ie && ie[1] >= 1) {
+ vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
+
+ if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
+ vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
+ vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
+ vht = vht_oper->vht_op_info_chwidth;
+ }
+
+ if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
+ &chan) == NUM_HOSTAPD_MODES) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Cannot determine operating class and channel");
+ return -2;
+ }
+
+ phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
+ (vht_oper != NULL));
+ if (phy_type == PHY_TYPE_UNSPECIFIED) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Cannot determine BSS phy type for Neighbor Report");
+ return -2;
+ }
+
+ info = wnm_get_bss_info(wpa_s, bss);
+
+ return wnm_add_nei_rep(buf, len, bss->bssid, info, op_class, chan,
+ phy_type, pref);
+}
+
+
+static int wnm_add_cand_list(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
+{
+ u8 *pos = buf;
+ unsigned int i, pref = 255;
+ struct os_reltime now;
+ struct wpa_ssid *ssid = wpa_s->current_ssid;
+
+ if (!ssid)
+ return 0;
+
+ /*
+ * TODO: Define when scan results are no longer valid for the candidate
+ * list.
+ */
+ os_get_reltime(&now);
+ if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
+ return 0;
+
+ wpa_printf(MSG_DEBUG,
+ "WNM: Add candidate list to BSS Transition Management Response frame");
+ for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
+ struct wpa_bss *bss = wpa_s->last_scan_res[i];
+ int res;
+
+ if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1)) {
+ res = wnm_nei_rep_add_bss(wpa_s, bss, pos, len, pref--);
+ if (res == -2)
+ continue; /* could not build entry for BSS */
+ if (res < 0)
+ break; /* no more room for candidates */
+ if (pref == 1)
+ break;
+
+ pos += res;
+ len -= res;
+ }
+ }
+
+ wpa_hexdump(MSG_DEBUG,
+ "WNM: BSS Transition Management Response candidate list",
+ buf, pos - buf);
+
+ return pos - buf;
+}
+
+
+static void wnm_send_bss_transition_mgmt_resp(
+ struct wpa_supplicant *wpa_s, u8 dialog_token,
+ enum bss_trans_mgmt_status_code status, u8 delay,
+ const u8 *target_bssid)
+{
+ u8 buf[2000], *pos;
+ struct ieee80211_mgmt *mgmt;
+ size_t len;
+ int res;
+
+ wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
+ "to " MACSTR " dialog_token=%u status=%u delay=%d",
+ MAC2STR(wpa_s->bssid), dialog_token, status, delay);
+ if (!wpa_s->current_bss) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Current BSS not known - drop response");
+ return;
+ }
+
+ mgmt = (struct ieee80211_mgmt *) buf;
+ os_memset(&buf, 0, sizeof(buf));
+ os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
+ os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
+ os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
+ mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+ WLAN_FC_STYPE_ACTION);
+ mgmt->u.action.category = WLAN_ACTION_WNM;
+ mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
+ mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
+ mgmt->u.action.u.bss_tm_resp.status_code = status;
+ mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
+ pos = mgmt->u.action.u.bss_tm_resp.variable;
+ if (target_bssid) {
+ os_memcpy(pos, target_bssid, ETH_ALEN);
+ pos += ETH_ALEN;
+ } else if (status == WNM_BSS_TM_ACCEPT) {
+ /*
+ * P802.11-REVmc clarifies that the Target BSSID field is always
+ * present when status code is zero, so use a fake value here if
+ * no BSSID is yet known.
+ */
+ os_memset(pos, 0, ETH_ALEN);
+ pos += ETH_ALEN;
+ }
+
+ if (status == WNM_BSS_TM_ACCEPT)
+ pos += wnm_add_cand_list(wpa_s, pos, buf + sizeof(buf) - pos);
+
+#ifdef CONFIG_MBO
+ if (status != WNM_BSS_TM_ACCEPT) {
+ pos += wpas_mbo_ie_bss_trans_reject(
+ wpa_s, pos, buf + sizeof(buf) - pos,
+ MBO_TRANSITION_REJECT_REASON_UNSPECIFIED);
+ }
+#endif /* CONFIG_MBO */
+
+ len = pos - (u8 *) &mgmt->u.action.category;
+
+ res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
+ wpa_s->own_addr, wpa_s->bssid,
+ &mgmt->u.action.category, len, 0);
+ if (res < 0) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Failed to send BSS Transition Management Response");
+ }
+}
+
+
+static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
+ struct wpa_bss *bss, struct wpa_ssid *ssid,
+ int after_new_scan)
+{
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "WNM: Transition to BSS " MACSTR
+ " based on BSS Transition Management Request (old BSSID "
+ MACSTR " after_new_scan=%d)",
+ MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
+
+ /* Send the BSS Management Response - Accept */
+ if (wpa_s->wnm_reply) {
+ wpa_s->wnm_reply = 0;
+ wpa_printf(MSG_DEBUG,
+ "WNM: Sending successful BSS Transition Management Response");
+ wnm_send_bss_transition_mgmt_resp(wpa_s,
+ wpa_s->wnm_dialog_token,
+ WNM_BSS_TM_ACCEPT,
+ 0, bss->bssid);
+ }
+
+ if (bss == wpa_s->current_bss) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Already associated with the preferred candidate");
+ wnm_deallocate_memory(wpa_s);
+ return;
+ }
+
+ wpa_s->reassociate = 1;
+ wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
+ wpa_supplicant_connect(wpa_s, bss, ssid);
+ wnm_deallocate_memory(wpa_s);
+}
+
+
+int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
+{
+ struct wpa_bss *bss;
+ struct wpa_ssid *ssid = wpa_s->current_ssid;
+ enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
+
+ if (!wpa_s->wnm_neighbor_report_elements)
+ return 0;
+
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "WNM: Process scan results for BSS Transition Management");
+ if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
+ &wpa_s->scan_trigger_time)) {
+ wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
+ wnm_deallocate_memory(wpa_s);
+ return 0;
+ }
+
+ if (!wpa_s->current_bss ||
+ os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
+ ETH_ALEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
+ return 0;
+ }
+
+ /* Compare the Neighbor Report and scan results */
+ bss = compare_scan_neighbor_results(wpa_s, 0);
+ if (!bss) {
+ wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
+ status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
+ goto send_bss_resp_fail;
+ }
+
+ /* Associate to the network */
+ wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
+ return 1;
+
+send_bss_resp_fail:
+ if (!reply_on_fail)
+ return 0;
+
+ /* Send reject response for all the failures */
+
+ if (wpa_s->wnm_reply) {
+ wpa_s->wnm_reply = 0;
+ wnm_send_bss_transition_mgmt_resp(wpa_s,
+ wpa_s->wnm_dialog_token,
+ status, 0, NULL);
+ }
+ wnm_deallocate_memory(wpa_s);
+
+ return 0;
+}
+
+
+static int cand_pref_compar(const void *a, const void *b)
+{
+ const struct neighbor_report *aa = a;
+ const struct neighbor_report *bb = b;
+
+ if (!aa->preference_present && !bb->preference_present)
+ return 0;
+ if (!aa->preference_present)
+ return 1;
+ if (!bb->preference_present)
+ return -1;
+ if (bb->preference > aa->preference)
+ return 1;
+ if (bb->preference < aa->preference)
+ return -1;
+ return 0;
+}
+
+
+static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
+{
+ if (!wpa_s->wnm_neighbor_report_elements)
+ return;
+ qsort(wpa_s->wnm_neighbor_report_elements,
+ wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
+ cand_pref_compar);
+}
+
+
+static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
+{
+ unsigned int i;
+
+ wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
+ if (!wpa_s->wnm_neighbor_report_elements)
+ return;
+ for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
+ struct neighbor_report *nei;
+
+ nei = &wpa_s->wnm_neighbor_report_elements[i];
+ wpa_printf(MSG_DEBUG, "%u: " MACSTR
+ " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
+ i, MAC2STR(nei->bssid), nei->bssid_info,
+ nei->regulatory_class,
+ nei->channel_number, nei->phy_type,
+ nei->preference_present ? nei->preference : -1,
+ nei->freq);
+ }
+}
+
+
+static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
+{
+ unsigned int i;
+
+ for (i = 0; i < wpa_s->hw.num_modes; i++) {
+ struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
+ int j;
+
+ for (j = 0; j < mode->num_channels; j++) {
+ struct hostapd_channel_data *chan;
+
+ chan = &mode->channels[j];
+ if (chan->freq == freq &&
+ !(chan->flag & HOSTAPD_CHAN_DISABLED))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+
+static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
+{
+ int *freqs;
+ int num_freqs = 0;
+ unsigned int i;
+
+ if (!wpa_s->wnm_neighbor_report_elements)
+ return;
+
+ if (wpa_s->hw.modes == NULL)
+ return;
+
+ os_free(wpa_s->next_scan_freqs);
+ wpa_s->next_scan_freqs = NULL;
+
+ freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
+ if (freqs == NULL)
+ return;
+
+ for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
+ struct neighbor_report *nei;
+
+ nei = &wpa_s->wnm_neighbor_report_elements[i];
+ if (nei->freq <= 0) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Unknown neighbor operating frequency for "
+ MACSTR " - scan all channels",
+ MAC2STR(nei->bssid));
+ os_free(freqs);
+ return;
+ }
+ if (chan_supported(wpa_s, nei->freq))
+ add_freq(freqs, &num_freqs, nei->freq);
+ }
+
+ if (num_freqs == 0) {
+ os_free(freqs);
+ return;
+ }
+
+ wpa_printf(MSG_DEBUG,
+ "WNM: Scan %d frequencies based on transition candidate list",
+ num_freqs);
+ wpa_s->next_scan_freqs = freqs;
+}
+
+
+static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
+{
+ struct wpa_scan_results *scan_res;
+ struct wpa_bss *bss;
+ struct wpa_ssid *ssid = wpa_s->current_ssid;
+ u8 i, found = 0;
+ size_t j;
+
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "WNM: Fetch current scan results from the driver for checking transition candidates");
+ scan_res = wpa_drv_get_scan_results2(wpa_s);
+ if (!scan_res) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
+ return 0;
+ }
+
+ if (scan_res->fetch_time.sec == 0)
+ os_get_reltime(&scan_res->fetch_time);
+
+ filter_scan_res(wpa_s, scan_res);
+
+ for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
+ struct neighbor_report *nei;
+
+ nei = &wpa_s->wnm_neighbor_report_elements[i];
+ if (nei->preference_present && nei->preference == 0)
+ continue;
+
+ for (j = 0; j < scan_res->num; j++) {
+ struct wpa_scan_res *res;
+ const u8 *ssid_ie;
+
+ res = scan_res->res[j];
+ if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
+ res->age > WNM_SCAN_RESULT_AGE * 1000)
+ continue;
+ bss = wpa_s->current_bss;
+ ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
+ if (bss && ssid_ie &&
+ (bss->ssid_len != ssid_ie[1] ||
+ os_memcmp(bss->ssid, ssid_ie + 2,
+ bss->ssid_len) != 0))
+ continue;
+
+ /* Potential candidate found */
+ found = 1;
+ scan_snr(res);
+ scan_est_throughput(wpa_s, res);
+ wpa_bss_update_scan_res(wpa_s, res,
+ &scan_res->fetch_time);
+ }
+ }
+
+ wpa_scan_results_free(scan_res);
+ if (!found) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "WNM: No transition candidate matches existing scan results");
+ return 0;
+ }
+
+ bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE);
+ if (!bss) {
+ wpa_dbg(wpa_s, MSG_DEBUG,
+ "WNM: Comparison of scan results against transition candidates did not find matches");
+ return 0;
+ }
+
+ /* Associate to the network */
+ wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
+ return 1;
+}
+
+
+static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
+ const u8 *pos, const u8 *end,
+ int reply)
+{
+ unsigned int beacon_int;
+ u8 valid_int;
+#ifdef CONFIG_MBO
+ const u8 *vendor;
+#endif /* CONFIG_MBO */
+
+ if (end - pos < 5)
+ return;
+
+ if (wpa_s->current_bss)
+ beacon_int = wpa_s->current_bss->beacon_int;
+ else
+ beacon_int = 100; /* best guess */
+
+ wpa_s->wnm_dialog_token = pos[0];
+ wpa_s->wnm_mode = pos[1];
+ wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
+ valid_int = pos[4];
+ wpa_s->wnm_reply = reply;
+
+ wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
+ "dialog_token=%u request_mode=0x%x "
+ "disassoc_timer=%u validity_interval=%u",
+ wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
+ wpa_s->wnm_dissoc_timer, valid_int);
+
+#if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
+ if (wpa_s->reject_btm_req_reason) {
+ wpa_printf(MSG_INFO,
+ "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
+ wpa_s->reject_btm_req_reason);
+ wnm_send_bss_transition_mgmt_resp(wpa_s,
+ wpa_s->wnm_dialog_token,
+ wpa_s->reject_btm_req_reason,
+ 0, NULL);
+ return;
+ }
+#endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
+
+ pos += 5;
+
+ if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
+ if (end - pos < 12) {
+ wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
+ return;
+ }
+ os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
+ pos += 12; /* BSS Termination Duration */
+ }
+
+ if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
+ char url[256];
+
+ if (end - pos < 1 || 1 + pos[0] > end - pos) {
+ wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
+ "Management Request (URL)");
+ return;
+ }
+ os_memcpy(url, pos + 1, pos[0]);
+ url[pos[0]] = '\0';
+ pos += 1 + pos[0];
+
+ wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
+ wpa_sm_pmf_enabled(wpa_s->wpa),
+ wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
+ }
+
+ if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
+ wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
+ "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
+ if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
+ /* TODO: mark current BSS less preferred for
+ * selection */
+ wpa_printf(MSG_DEBUG, "Trying to find another BSS");
+ wpa_supplicant_req_scan(wpa_s, 0, 0);
+ }
+ }
+
+#ifdef CONFIG_MBO
+ vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
+ if (vendor)
+ wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
+#endif /* CONFIG_MBO */
+
+ if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
+ unsigned int valid_ms;
+
+ wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
+ wnm_deallocate_memory(wpa_s);
+ wpa_s->wnm_neighbor_report_elements = os_calloc(
+ WNM_MAX_NEIGHBOR_REPORT,
+ sizeof(struct neighbor_report));
+ if (wpa_s->wnm_neighbor_report_elements == NULL)
+ return;
+
+ while (end - pos >= 2 &&
+ wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
+ {
+ u8 tag = *pos++;
+ u8 len = *pos++;
+
+ wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
+ tag);
+ if (len > end - pos) {
+ wpa_printf(MSG_DEBUG, "WNM: Truncated request");
+ return;
+ }
+ if (tag == WLAN_EID_NEIGHBOR_REPORT) {
+ struct neighbor_report *rep;
+ rep = &wpa_s->wnm_neighbor_report_elements[
+ wpa_s->wnm_num_neighbor_report];
+ wnm_parse_neighbor_report(wpa_s, pos, len, rep);
+ wpa_s->wnm_num_neighbor_report++;
+ }
+
+ pos += len;
+ }
+
+ if (!wpa_s->wnm_num_neighbor_report) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Candidate list included bit is set, but no candidates found");
+ wnm_send_bss_transition_mgmt_resp(
+ wpa_s, wpa_s->wnm_dialog_token,
+ WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
+ 0, NULL);
+ return;
+ }
+
+ wnm_sort_cand_list(wpa_s);
+ wnm_dump_cand_list(wpa_s);
+ valid_ms = valid_int * beacon_int * 128 / 125;
+ wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
+ valid_ms);
+ os_get_reltime(&wpa_s->wnm_cand_valid_until);
+ wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
+ wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
+ wpa_s->wnm_cand_valid_until.sec +=
+ wpa_s->wnm_cand_valid_until.usec / 1000000;
+ wpa_s->wnm_cand_valid_until.usec %= 1000000;
+ os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
+
+ /*
+ * Fetch the latest scan results from the kernel and check for
+ * candidates based on those results first. This can help in
+ * finding more up-to-date information should the driver has
+ * done some internal scanning operations after the last scan
+ * result update in wpa_supplicant.
+ */
+ if (wnm_fetch_scan_results(wpa_s) > 0)
+ return;
+
+ /*
+ * Try to use previously received scan results, if they are
+ * recent enough to use for a connection.
+ */
+ if (wpa_s->last_scan_res_used > 0) {
+ struct os_reltime now;
+
+ os_get_reltime(&now);
+ if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Try to use recent scan results");
+ if (wnm_scan_process(wpa_s, 0) > 0)
+ return;
+ wpa_printf(MSG_DEBUG,
+ "WNM: No match in previous scan results - try a new scan");
+ }
+ }
+
+ wnm_set_scan_freqs(wpa_s);
+ if (wpa_s->wnm_num_neighbor_report == 1) {
+ os_memcpy(wpa_s->next_scan_bssid,
+ wpa_s->wnm_neighbor_report_elements[0].bssid,
+ ETH_ALEN);
+ wpa_printf(MSG_DEBUG,
+ "WNM: Scan only for a specific BSSID since there is only a single candidate "
+ MACSTR, MAC2STR(wpa_s->next_scan_bssid));
+ }
+ wpa_supplicant_req_scan(wpa_s, 0, 0);
+ } else if (reply) {
+ enum bss_trans_mgmt_status_code status;
+ if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
+ status = WNM_BSS_TM_ACCEPT;
+ else {
+ wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
+ status = WNM_BSS_TM_REJECT_UNSPECIFIED;
+ }
+ wnm_send_bss_transition_mgmt_resp(wpa_s,
+ wpa_s->wnm_dialog_token,
+ status, 0, NULL);
+ }
+}
+
+
+int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
+ u8 query_reason, int cand_list)
+{
+ u8 buf[2000], *pos;
+ struct ieee80211_mgmt *mgmt;
+ size_t len;
+ int ret;
+
+ wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
+ MACSTR " query_reason=%u%s",
+ MAC2STR(wpa_s->bssid), query_reason,
+ cand_list ? " candidate list" : "");
+
+ mgmt = (struct ieee80211_mgmt *) buf;
+ os_memset(&buf, 0, sizeof(buf));
+ os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
+ os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
+ os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
+ mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+ WLAN_FC_STYPE_ACTION);
+ mgmt->u.action.category = WLAN_ACTION_WNM;
+ mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
+ mgmt->u.action.u.bss_tm_query.dialog_token = 1;
+ mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
+ pos = mgmt->u.action.u.bss_tm_query.variable;
+
+ if (cand_list)
+ pos += wnm_add_cand_list(wpa_s, pos, buf + sizeof(buf) - pos);
+
+ len = pos - (u8 *) &mgmt->u.action.category;
+
+ ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
+ wpa_s->own_addr, wpa_s->bssid,
+ &mgmt->u.action.category, len, 0);
+
+ return ret;
+}
+
+
+static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
+ const u8 *sa, const u8 *data,
+ int len)
+{
+ const u8 *pos, *end, *next;
+ u8 ie, ie_len;
+
+ pos = data;
+ end = data + len;
+
+ while (end - pos > 1) {
+ ie = *pos++;
+ ie_len = *pos++;
+ wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
+ ie, ie_len);
+ if (ie_len > end - pos) {
+ wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
+ "subelement");
+ break;
+ }
+ next = pos + ie_len;
+ if (ie_len < 4) {
+ pos = next;
+ continue;
+ }
+ wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
+ WPA_GET_BE24(pos), pos[3]);
+
+#ifdef CONFIG_HS20
+ if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
+ WPA_GET_BE24(pos) == OUI_WFA &&
+ pos[3] == HS20_WNM_SUB_REM_NEEDED) {
+ /* Subscription Remediation subelement */
+ const u8 *ie_end;
+ u8 url_len;
+ char *url;
+ u8 osu_method;
+
+ wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
+ "subelement");
+ ie_end = pos + ie_len;
+ pos += 4;
+ url_len = *pos++;
+ if (url_len == 0) {
+ wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
+ url = NULL;
+ osu_method = 1;
+ } else {
+ if (url_len + 1 > ie_end - pos) {
+ wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
+ url_len,
+ (int) (ie_end - pos));
+ break;
+ }
+ url = os_malloc(url_len + 1);
+ if (url == NULL)
+ break;
+ os_memcpy(url, pos, url_len);
+ url[url_len] = '\0';
+ osu_method = pos[url_len];
+ }
+ hs20_rx_subscription_remediation(wpa_s, url,
+ osu_method);
+ os_free(url);
+ pos = next;
+ continue;
+ }
+
+ if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
+ WPA_GET_BE24(pos) == OUI_WFA &&
+ pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
+ const u8 *ie_end;
+ u8 url_len;
+ char *url;
+ u8 code;
+ u16 reauth_delay;
+
+ ie_end = pos + ie_len;
+ pos += 4;
+ code = *pos++;
+ reauth_delay = WPA_GET_LE16(pos);
+ pos += 2;
+ url_len = *pos++;
+ wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
+ "Imminent - Reason Code %u "
+ "Re-Auth Delay %u URL Length %u",
+ code, reauth_delay, url_len);
+ if (url_len > ie_end - pos)
+ break;
+ url = os_malloc(url_len + 1);
+ if (url == NULL)
+ break;
+ os_memcpy(url, pos, url_len);
+ url[url_len] = '\0';
+ hs20_rx_deauth_imminent_notice(wpa_s, code,
+ reauth_delay, url);
+ os_free(url);
+ pos = next;
+ continue;
+ }
+#endif /* CONFIG_HS20 */
+
+ pos = next;
+ }
+}
+
+
+static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
+ const u8 *sa, const u8 *frm, int len)
+{
+ const u8 *pos, *end;
+ u8 dialog_token, type;
+
+ /* Dialog Token [1] | Type [1] | Subelements */
+
+ if (len < 2 || sa == NULL)
+ return;
+ end = frm + len;
+ pos = frm;
+ dialog_token = *pos++;
+ type = *pos++;
+
+ wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
+ "(dialog_token %u type %u sa " MACSTR ")",
+ dialog_token, type, MAC2STR(sa));
+ wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
+ pos, end - pos);
+
+ if (wpa_s->wpa_state != WPA_COMPLETED ||
+ os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
+ "from our AP - ignore it");
+ return;
+ }
+
+ switch (type) {
+ case 1:
+ ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
+ break;
+ default:
+ wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
+ "WNM-Notification type %u", type);
+ break;
+ }
+}
+
+
+void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
+ const struct ieee80211_mgmt *mgmt, size_t len)
+{
+ const u8 *pos, *end;
+ u8 act;
+
+ if (len < IEEE80211_HDRLEN + 2)
+ return;
+
+ pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
+ act = *pos++;
+ end = ((const u8 *) mgmt) + len;
+
+ wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
+ act, MAC2STR(mgmt->sa));
+ if (wpa_s->wpa_state < WPA_ASSOCIATED ||
+ os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
+ wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
+ "frame");
+ return;
+ }
+
+ switch (act) {
+ case WNM_BSS_TRANS_MGMT_REQ:
+ ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
+ !(mgmt->da[0] & 0x01));
+ break;
+ case WNM_SLEEP_MODE_RESP:
+ ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
+ break;
+ case WNM_NOTIFICATION_REQ:
+ ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
+ break;
+ default:
+ wpa_printf(MSG_ERROR, "WNM: Unknown request");
+ break;
+ }
+}
projects / mech_eap.git / blobdiff