+++ /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