#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"
#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,
/* set the TFS IE to driver */
static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
- const u8 *addr, u8 *buf, u16 *buf_len,
+ 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, buf, buf_len);
+ return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
}
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);
static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
- u8 *tfsresp_ie_start,
- u8 *tfsresp_ie_end)
+ 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);
/* 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,
+ tfsresp_ie_len,
WNM_SLEEP_TFS_RESP_IE_SET))
wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
}
end = ptr + key_len_total;
wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
- while (ptr + 1 < end) {
- if (ptr + 2 + ptr[1] > end) {
+ 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) {
* Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
* WNM-Sleep Mode IE | TFS Response IE
*/
- u8 *pos = (u8 *) frm; /* point to payload after the action field */
+ 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) */
- u8 *tfsresp_ie_start = NULL;
- u8 *tfsresp_ie_end = NULL;
+ 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;
wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
frm[0], key_len_total);
- pos += 3 + key_len_total;
- if (pos > frm + len) {
+ left = len - 3;
+ if (key_len_total > left) {
wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
return;
}
- while (pos - frm < len) {
+ pos += 3 + key_len_total;
+ while (pos - frm + 1 < len) {
u8 ie_len = *(pos + 1);
- if (pos + 2 + ie_len > frm + len) {
+ 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)
+ 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)
int i;
for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
- os_free(wpa_s->wnm_neighbor_report_elements[i].tsf_info);
- os_free(wpa_s->wnm_neighbor_report_elements[i].con_coun_str);
- os_free(wpa_s->wnm_neighbor_report_elements[i].bss_tran_can);
- os_free(wpa_s->wnm_neighbor_report_elements[i].bss_term_dur);
- os_free(wpa_s->wnm_neighbor_report_elements[i].bearing);
os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
- os_free(wpa_s->wnm_neighbor_report_elements[i].rrm_cap);
os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
}
wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
break;
}
- os_free(rep->tsf_info);
- rep->tsf_info = os_zalloc(sizeof(struct tsf_info));
- if (rep->tsf_info == NULL)
- break;
- rep->tsf_info->present = 1;
- os_memcpy(rep->tsf_info->tsf_offset, pos, 2);
- os_memcpy(rep->tsf_info->beacon_interval, pos + 2, 2);
+ 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) {
"country string");
break;
}
- os_free(rep->con_coun_str);
- rep->con_coun_str =
- os_zalloc(sizeof(struct condensed_country_string));
- if (rep->con_coun_str == NULL)
- break;
- rep->con_coun_str->present = 1;
- os_memcpy(rep->con_coun_str->country_string, pos, 2);
+ os_memcpy(rep->country, pos, 2);
+ rep->country_present = 1;
break;
case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
if (elen < 1) {
"candidate");
break;
}
- os_free(rep->bss_tran_can);
- rep->bss_tran_can =
- os_zalloc(sizeof(struct bss_transition_candidate));
- if (rep->bss_tran_can == NULL)
- break;
- rep->bss_tran_can->present = 1;
- rep->bss_tran_can->preference = pos[0];
+ rep->preference = pos[0];
+ rep->preference_present = 1;
break;
case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
- if (elen < 12) {
- wpa_printf(MSG_DEBUG, "WNM: Too short BSS termination "
- "duration");
- break;
- }
- os_free(rep->bss_term_dur);
- rep->bss_term_dur =
- os_zalloc(sizeof(struct bss_termination_duration));
- if (rep->bss_term_dur == NULL)
- break;
- rep->bss_term_dur->present = 1;
- os_memcpy(rep->bss_term_dur->duration, pos, 12);
+ 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) {
"bearing");
break;
}
- os_free(rep->bearing);
- rep->bearing = os_zalloc(sizeof(struct bearing));
- if (rep->bearing == NULL)
- break;
- rep->bearing->present = 1;
- os_memcpy(rep->bearing->bearing, pos, 8);
+ 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 < 2) {
+ if (elen < 1) {
wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
"pilot");
break;
rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
if (rep->meas_pilot == NULL)
break;
- rep->meas_pilot->present = 1;
rep->meas_pilot->measurement_pilot = pos[0];
- rep->meas_pilot->num_vendor_specific = pos[1];
- os_memcpy(rep->meas_pilot->vendor_specific, pos + 2, elen - 2);
+ 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 < 4) {
+ if (elen < 5) {
wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
"capabilities");
break;
}
- os_free(rep->rrm_cap);
- rep->rrm_cap =
- os_zalloc(sizeof(struct rrm_enabled_capabilities));
- if (rep->rrm_cap == NULL)
- break;
- rep->rrm_cap->present = 1;
- os_memcpy(rep->rrm_cap->capabilities, pos, 4);
+ os_memcpy(rep->rm_capab, pos, 5);
+ rep->rm_capab_present = 1;
break;
case WNM_NEIGHBOR_MULTIPLE_BSSID:
- if (elen < 2) {
+ if (elen < 1) {
wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
break;
}
rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
if (rep->mul_bssid == NULL)
break;
- rep->mul_bssid->present = 1;
rep->mul_bssid->max_bssid_indicator = pos[0];
- rep->mul_bssid->num_vendor_specific = pos[1];
- os_memcpy(rep->mul_bssid->vendor_specific, pos + 2, elen - 2);
+ 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)
}
os_memcpy(rep->bssid, pos, ETH_ALEN);
- os_memcpy(rep->bssid_information, pos + ETH_ALEN, 4);
+ rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
rep->regulatory_class = *(pos + 10);
rep->channel_number = *(pos + 11);
rep->phy_type = *(pos + 12);
left -= elen;
pos += elen;
}
+
+ rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
+ rep->channel_number);
}
-static int compare_scan_neighbor_results(struct wpa_supplicant *wpa_s,
- struct wpa_scan_results *scan_res,
- struct neighbor_report *neigh_rep,
- u8 num_neigh_rep, u8 *bssid_to_connect)
+static struct wpa_bss *
+compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs)
{
- u8 i, j;
+ u8 i;
+ struct wpa_bss *bss = wpa_s->current_bss;
+ struct wpa_bss *target;
- if (scan_res == NULL || num_neigh_rep == 0 || !wpa_s->current_bss)
- return 0;
+ if (!bss)
+ return NULL;
wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
- MAC2STR(wpa_s->bssid), wpa_s->current_bss->level);
+ MAC2STR(wpa_s->bssid), bss->level);
- for (i = 0; i < num_neigh_rep; i++) {
- for (j = 0; j < scan_res->num; j++) {
- /* Check for a better RSSI AP */
- if (os_memcmp(scan_res->res[j]->bssid,
- neigh_rep[i].bssid, ETH_ALEN) == 0 &&
- scan_res->res[j]->level >
- wpa_s->current_bss->level) {
- /* Got a BSSID with better RSSI value */
- os_memcpy(bssid_to_connect, neigh_rep[i].bssid,
- ETH_ALEN);
- wpa_printf(MSG_DEBUG, "Found a BSS " MACSTR
- " with better scan RSSI %d",
- MAC2STR(scan_res->res[j]->bssid),
- scan_res->res[j]->level);
- return 1;
+ 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;
}
- wpa_printf(MSG_DEBUG, "scan_res[%d] " MACSTR
- " RSSI %d", j,
- MAC2STR(scan_res->res[j]->bssid),
- scan_res->res[j]->level);
}
+
+ 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 0;
+ 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;
}
enum bss_trans_mgmt_status_code status, u8 delay,
const u8 *target_bssid)
{
- u8 buf[1000], *pos;
+ 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));
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;
- 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);
+ 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");
+ }
}
-void wnm_scan_response(struct wpa_supplicant *wpa_s,
- struct wpa_scan_results *scan_res)
+static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
+ struct wpa_bss *bss, struct wpa_ssid *ssid,
+ int after_new_scan)
{
- u8 bssid[ETH_ALEN];
-
- if (scan_res == NULL) {
- wpa_printf(MSG_ERROR, "Scan result is NULL");
- goto send_bss_resp_fail;
- }
+ 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);
- /* Compare the Neighbor Report and scan results */
- if (compare_scan_neighbor_results(wpa_s, scan_res,
- wpa_s->wnm_neighbor_report_elements,
- wpa_s->wnm_num_neighbor_report,
- bssid) == 1) {
- /* Associate to the network */
- struct wpa_bss *bss;
- struct wpa_ssid *ssid = wpa_s->current_ssid;
-
- bss = wpa_bss_get_bssid(wpa_s, bssid);
- if (!bss) {
- wpa_printf(MSG_DEBUG, "WNM: Target AP not found from "
- "BSS table");
- goto send_bss_resp_fail;
- }
-
- /* Send the BSS Management Response - Accept */
- if (wpa_s->wnm_reply) {
- wnm_send_bss_transition_mgmt_resp(wpa_s,
+ /* 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, bssid);
- }
+ 0, bss->bssid);
+ }
- wpa_s->reassociate = 1;
- wpa_supplicant_connect(wpa_s, bss, ssid);
+ if (bss == wpa_s->current_bss) {
+ wpa_printf(MSG_DEBUG,
+ "WNM: Already associated with the preferred candidate");
wnm_deallocate_memory(wpa_s);
return;
}
- /* Send reject response for all the failures */
-send_bss_resp_fail:
+ 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,
- WNM_BSS_TM_REJECT_UNSPECIFIED,
- 0, NULL);
+ 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);
}
- return;
+
+ 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;
}
const u8 *pos, const u8 *end,
int reply)
{
- if (pos + 5 > end)
+ 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);
- wpa_s->wnm_validity_interval = pos[4];
+ 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, wpa_s->wnm_validity_interval);
+ wpa_s->wnm_dissoc_timer, valid_int);
pos += 5;
if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
- if (pos + 12 > end) {
+ if (end - pos < 12) {
wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
return;
}
if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
char url[256];
- unsigned int beacon_int;
- if (pos + 1 > end || pos + 1 + pos[0] > end) {
+ if (end - pos < 1 || 1 + pos[0] > end - pos) {
wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
"Management Request (URL)");
return;
url[pos[0]] = '\0';
pos += 1 + pos[0];
- if (wpa_s->current_bss)
- beacon_int = wpa_s->current_bss->beacon_int;
- else
- beacon_int = 100; /* best guess */
-
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);
}
}
+#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");
- wpa_s->wnm_num_neighbor_report = 0;
- os_free(wpa_s->wnm_neighbor_report_elements);
- wpa_s->wnm_neighbor_report_elements = os_zalloc(
- WNM_MAX_NEIGHBOR_REPORT *
+ 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 (pos + 2 <= end &&
+ while (end - pos >= 2 &&
wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
{
u8 tag = *pos++;
wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
tag);
- if (pos + len > end) {
+ if (len > end - pos) {
wpa_printf(MSG_DEBUG, "WNM: Truncated request");
return;
}
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;
- wpa_s->wnm_num_neighbor_report++;
}
- wpa_s->scan_res_handler = wnm_scan_response;
+ 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;
int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
- u8 query_reason)
+ u8 query_reason, int cand_list)
{
- u8 buf[1000], *pos;
+ 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",
- MAC2STR(wpa_s->bssid), query_reason);
+ 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));
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,
pos = data;
end = data + len;
- while (pos + 1 < end) {
+ while (end - pos > 1) {
ie = *pos++;
ie_len = *pos++;
wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
url = NULL;
osu_method = 1;
} else {
- if (pos + url_len + 1 > ie_end) {
+ 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));
"Imminent - Reason Code %u "
"Re-Auth Delay %u URL Length %u",
code, reauth_delay, url_len);
- if (pos + url_len > ie_end)
+ if (url_len > ie_end - pos)
break;
url = os_malloc(url_len + 1);
if (url == NULL)
if (len < IEEE80211_HDRLEN + 2)
return;
- pos = &mgmt->u.action.category;
- pos++;
+ pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
act = *pos++;
end = ((const u8 *) mgmt) + len;
projects / mech_eap.git / blobdiff