* hostapd / Hardware feature query and different modes
* Copyright 2002-2003, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
- * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
-#include "drivers/driver.h"
+#include "common/wpa_ctrl.h"
+#include "common/hw_features_common.h"
#include "hostapd.h"
#include "ap_config.h"
#include "ap_drv_ops.h"
+#include "acs.h"
+#include "ieee802_11.h"
+#include "beacon.h"
#include "hw_features.h"
}
+#ifndef CONFIG_NO_STDOUT_DEBUG
+static char * dfs_info(struct hostapd_channel_data *chan)
+{
+ static char info[256];
+ char *state;
+
+ switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) {
+ case HOSTAPD_CHAN_DFS_UNKNOWN:
+ state = "unknown";
+ break;
+ case HOSTAPD_CHAN_DFS_USABLE:
+ state = "usable";
+ break;
+ case HOSTAPD_CHAN_DFS_UNAVAILABLE:
+ state = "unavailable";
+ break;
+ case HOSTAPD_CHAN_DFS_AVAILABLE:
+ state = "available";
+ break;
+ default:
+ return "";
+ }
+ os_snprintf(info, sizeof(info), " (DFS state = %s)", state);
+ info[sizeof(info) - 1] = '\0';
+
+ return info;
+}
+#endif /* CONFIG_NO_STDOUT_DEBUG */
+
+
int hostapd_get_hw_features(struct hostapd_iface *iface)
{
struct hostapd_data *hapd = iface->bss[0];
- int ret = 0, i, j;
+ int i, j;
u16 num_modes, flags;
struct hostapd_hw_modes *modes;
for (i = 0; i < num_modes; i++) {
struct hostapd_hw_modes *feature = &modes[i];
+ int dfs_enabled = hapd->iconf->ieee80211h &&
+ (iface->drv_flags & WPA_DRIVER_FLAGS_RADAR);
+
/* set flag for channels we can use in current regulatory
* domain */
for (j = 0; j < feature->num_channels; j++) {
+ int dfs = 0;
+
/*
* Disable all channels that are marked not to allow
- * IBSS operation or active scanning. In addition,
- * disable all channels that require radar detection,
- * since that (in addition to full DFS) is not yet
- * supported.
+ * to initiate radiation (a.k.a. passive scan and no
+ * IBSS).
+ * Use radar channels only if the driver supports DFS.
*/
- if (feature->channels[j].flag &
- (HOSTAPD_CHAN_NO_IBSS |
- HOSTAPD_CHAN_PASSIVE_SCAN |
- HOSTAPD_CHAN_RADAR))
+ if ((feature->channels[j].flag &
+ HOSTAPD_CHAN_RADAR) && dfs_enabled) {
+ dfs = 1;
+ } else if (((feature->channels[j].flag &
+ HOSTAPD_CHAN_RADAR) &&
+ !(iface->drv_flags &
+ WPA_DRIVER_FLAGS_DFS_OFFLOAD)) ||
+ (feature->channels[j].flag &
+ HOSTAPD_CHAN_NO_IR)) {
feature->channels[j].flag |=
HOSTAPD_CHAN_DISABLED;
+ }
+
if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED)
continue;
+
wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d "
- "chan=%d freq=%d MHz max_tx_power=%d dBm",
+ "chan=%d freq=%d MHz max_tx_power=%d dBm%s",
feature->mode,
feature->channels[j].chan,
feature->channels[j].freq,
- feature->channels[j].max_tx_power);
+ feature->channels[j].max_tx_power,
+ dfs ? dfs_info(&feature->channels[j]) : "");
}
}
- return ret;
+ return 0;
}
-static int hostapd_prepare_rates(struct hostapd_data *hapd,
- struct hostapd_hw_modes *mode)
+int hostapd_prepare_rates(struct hostapd_iface *iface,
+ struct hostapd_hw_modes *mode)
{
int i, num_basic_rates = 0;
int basic_rates_a[] = { 60, 120, 240, -1 };
int basic_rates_g[] = { 10, 20, 55, 110, -1 };
int *basic_rates;
- if (hapd->iconf->basic_rates)
- basic_rates = hapd->iconf->basic_rates;
+ if (iface->conf->basic_rates)
+ basic_rates = iface->conf->basic_rates;
else switch (mode->mode) {
case HOSTAPD_MODE_IEEE80211A:
basic_rates = basic_rates_a;
case HOSTAPD_MODE_IEEE80211G:
basic_rates = basic_rates_g;
break;
+ case HOSTAPD_MODE_IEEE80211AD:
+ return 0; /* No basic rates for 11ad */
default:
return -1;
}
- if (hostapd_set_rate_sets(hapd, hapd->iconf->supported_rates,
- basic_rates, mode->mode)) {
- wpa_printf(MSG_ERROR, "Failed to update rate sets in kernel "
- "module");
- }
+ i = 0;
+ while (basic_rates[i] >= 0)
+ i++;
+ if (i)
+ i++; /* -1 termination */
+ os_free(iface->basic_rates);
+ iface->basic_rates = os_malloc(i * sizeof(int));
+ if (iface->basic_rates)
+ os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int));
- os_free(hapd->iface->current_rates);
- hapd->iface->num_rates = 0;
+ os_free(iface->current_rates);
+ iface->num_rates = 0;
- hapd->iface->current_rates =
- os_zalloc(mode->num_rates * sizeof(struct hostapd_rate_data));
- if (!hapd->iface->current_rates) {
+ iface->current_rates =
+ os_calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
+ if (!iface->current_rates) {
wpa_printf(MSG_ERROR, "Failed to allocate memory for rate "
"table.");
return -1;
for (i = 0; i < mode->num_rates; i++) {
struct hostapd_rate_data *rate;
- if (hapd->iconf->supported_rates &&
- !hostapd_rate_found(hapd->iconf->supported_rates,
+ if (iface->conf->supported_rates &&
+ !hostapd_rate_found(iface->conf->supported_rates,
mode->rates[i]))
continue;
- rate = &hapd->iface->current_rates[hapd->iface->num_rates];
+ rate = &iface->current_rates[iface->num_rates];
rate->rate = mode->rates[i];
if (hostapd_rate_found(basic_rates, rate->rate)) {
rate->flags |= HOSTAPD_RATE_BASIC;
num_basic_rates++;
}
wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x",
- hapd->iface->num_rates, rate->rate, rate->flags);
- hapd->iface->num_rates++;
+ iface->num_rates, rate->rate, rate->flags);
+ iface->num_rates++;
}
- if (hapd->iface->num_rates == 0 || num_basic_rates == 0) {
+ if ((iface->num_rates == 0 || num_basic_rates == 0) &&
+ (!iface->conf->ieee80211n || !iface->conf->require_ht)) {
wpa_printf(MSG_ERROR, "No rates remaining in supported/basic "
"rate sets (%d,%d).",
- hapd->iface->num_rates, num_basic_rates);
+ iface->num_rates, num_basic_rates);
return -1;
}
#ifdef CONFIG_IEEE80211N
static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface)
{
- int sec_chan, ok, j, first;
- int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157,
- 184, 192 };
- size_t k;
+ int pri_chan, sec_chan;
if (!iface->conf->secondary_channel)
return 1; /* HT40 not used */
- sec_chan = iface->conf->channel + iface->conf->secondary_channel * 4;
- wpa_printf(MSG_DEBUG, "HT40: control channel: %d "
- "secondary channel: %d",
- iface->conf->channel, sec_chan);
-
- /* Verify that HT40 secondary channel is an allowed 20 MHz
- * channel */
- ok = 0;
- for (j = 0; j < iface->current_mode->num_channels; j++) {
- struct hostapd_channel_data *chan =
- &iface->current_mode->channels[j];
- if (!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
- chan->chan == sec_chan) {
- ok = 1;
- break;
- }
- }
- if (!ok) {
- wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed",
- sec_chan);
- return 0;
- }
-
- /*
- * Verify that HT40 primary,secondary channel pair is allowed per
- * IEEE 802.11n Annex J. This is only needed for 5 GHz band since
- * 2.4 GHz rules allow all cases where the secondary channel fits into
- * the list of allowed channels (already checked above).
- */
- if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
- return 1;
-
- if (iface->conf->secondary_channel > 0)
- first = iface->conf->channel;
- else
- first = sec_chan;
-
- ok = 0;
- for (k = 0; k < sizeof(allowed) / sizeof(allowed[0]); k++) {
- if (first == allowed[k]) {
- ok = 1;
- break;
- }
- }
- if (!ok) {
- wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed",
- iface->conf->channel,
- iface->conf->secondary_channel);
- return 0;
- }
+ pri_chan = iface->conf->channel;
+ sec_chan = pri_chan + iface->conf->secondary_channel * 4;
- return 1;
+ return allowed_ht40_channel_pair(iface->current_mode, pri_chan,
+ sec_chan);
}
}
-static void ieee80211n_get_pri_sec_chan(struct wpa_scan_res *bss,
- int *pri_chan, int *sec_chan)
-{
- struct ieee80211_ht_operation *oper;
- struct ieee802_11_elems elems;
-
- *pri_chan = *sec_chan = 0;
-
- ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0);
- if (elems.ht_operation &&
- elems.ht_operation_len >= sizeof(*oper)) {
- oper = (struct ieee80211_ht_operation *) elems.ht_operation;
- *pri_chan = oper->control_chan;
- if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
- int sec = oper->ht_param &
- HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
- if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
- *sec_chan = *pri_chan + 4;
- else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
- *sec_chan = *pri_chan - 4;
- }
- }
-}
-
-
static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
struct wpa_scan_results *scan_res)
{
- int pri_chan, sec_chan, pri_freq, sec_freq, pri_bss, sec_bss;
- int bss_pri_chan, bss_sec_chan;
- size_t i;
- int match;
+ int pri_chan, sec_chan;
+ int res;
pri_chan = iface->conf->channel;
- sec_chan = iface->conf->secondary_channel * 4;
- pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan);
- if (iface->conf->secondary_channel > 0)
- sec_freq = pri_freq + 20;
- else
- sec_freq = pri_freq - 20;
+ sec_chan = pri_chan + iface->conf->secondary_channel * 4;
- /*
- * Switch PRI/SEC channels if Beacons were detected on selected SEC
- * channel, but not on selected PRI channel.
- */
- pri_bss = sec_bss = 0;
- for (i = 0; i < scan_res->num; i++) {
- struct wpa_scan_res *bss = scan_res->res[i];
- if (bss->freq == pri_freq)
- pri_bss++;
- else if (bss->freq == sec_freq)
- sec_bss++;
- }
- if (sec_bss && !pri_bss) {
- wpa_printf(MSG_INFO, "Switch own primary and secondary "
- "channel to get secondary channel with no Beacons "
- "from other BSSes");
- ieee80211n_switch_pri_sec(iface);
- }
+ res = check_40mhz_5g(iface->current_mode, scan_res, pri_chan, sec_chan);
- /*
- * Match PRI/SEC channel with any existing HT40 BSS on the same
- * channels that we are about to use (if already mixed order in
- * existing BSSes, use own preference).
- */
- match = 0;
- for (i = 0; i < scan_res->num; i++) {
- struct wpa_scan_res *bss = scan_res->res[i];
- ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
- if (pri_chan == bss_pri_chan &&
- sec_chan == bss_sec_chan) {
- match = 1;
- break;
- }
- }
- if (!match) {
- for (i = 0; i < scan_res->num; i++) {
- struct wpa_scan_res *bss = scan_res->res[i];
- ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan,
- &bss_sec_chan);
- if (pri_chan == bss_sec_chan &&
- sec_chan == bss_pri_chan) {
- wpa_printf(MSG_INFO, "Switch own primary and "
- "secondary channel due to BSS "
- "overlap with " MACSTR,
- MAC2STR(bss->bssid));
- ieee80211n_switch_pri_sec(iface);
- break;
- }
+ if (res == 2) {
+ if (iface->conf->no_pri_sec_switch) {
+ wpa_printf(MSG_DEBUG,
+ "Cannot switch PRI/SEC channels due to local constraint");
+ } else {
+ ieee80211n_switch_pri_sec(iface);
}
}
- return 1;
+ return !!res;
}
static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface,
struct wpa_scan_results *scan_res)
{
- int pri_freq, sec_freq;
- int affected_start, affected_end;
- size_t i;
-
- pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
- if (iface->conf->secondary_channel > 0)
- sec_freq = pri_freq + 20;
- else
- sec_freq = pri_freq - 20;
- affected_start = (pri_freq + sec_freq) / 2 - 25;
- affected_end = (pri_freq + sec_freq) / 2 + 25;
- wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
- affected_start, affected_end);
- for (i = 0; i < scan_res->num; i++) {
- struct wpa_scan_res *bss = scan_res->res[i];
- int pri = bss->freq;
- int sec = pri;
- int sec_chan, pri_chan;
-
- ieee80211n_get_pri_sec_chan(bss, &pri_chan, &sec_chan);
-
- if (sec_chan) {
- if (sec_chan < pri_chan)
- sec = pri - 20;
- else
- sec = pri + 20;
- }
-
- if ((pri < affected_start || pri > affected_end) &&
- (sec < affected_start || sec > affected_end))
- continue; /* not within affected channel range */
-
- wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR
- " freq=%d pri=%d sec=%d",
- MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan);
-
- if (sec_chan) {
- if (pri_freq != pri || sec_freq != sec) {
- wpa_printf(MSG_DEBUG, "40 MHz pri/sec "
- "mismatch with BSS " MACSTR
- " <%d,%d> (chan=%d%c) vs. <%d,%d>",
- MAC2STR(bss->bssid),
- pri, sec, pri_chan,
- sec > pri ? '+' : '-',
- pri_freq, sec_freq);
- return 0;
- }
- }
-
- /* TODO: 40 MHz intolerant */
- }
-
- return 1;
-}
-
-
-static void wpa_scan_results_free(struct wpa_scan_results *res)
-{
- size_t i;
+ int pri_chan, sec_chan;
- if (res == NULL)
- return;
+ pri_chan = iface->conf->channel;
+ sec_chan = pri_chan + iface->conf->secondary_channel * 4;
- for (i = 0; i < res->num; i++)
- os_free(res->res[i]);
- os_free(res->res);
- os_free(res);
+ return check_40mhz_2g4(iface->current_mode, scan_res, pri_chan,
+ sec_chan);
}
{
struct wpa_scan_results *scan_res;
int oper40;
+ int res;
/* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
- * allowed per IEEE 802.11n/D7.0, 11.14.3.2 */
+ * allowed per IEEE Std 802.11-2012, 10.15.3.2 */
iface->scan_cb = NULL;
oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
wpa_scan_results_free(scan_res);
+ iface->secondary_ch = iface->conf->secondary_channel;
if (!oper40) {
wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
"channel pri=%d sec=%d based on overlapping BSSes",
iface->conf->channel +
iface->conf->secondary_channel * 4);
iface->conf->secondary_channel = 0;
- iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
+ if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) {
+ /*
+ * TODO: Could consider scheduling another scan to check
+ * if channel width can be changed if no coex reports
+ * are received from associating stations.
+ */
+ }
+ }
+
+ res = ieee80211n_allowed_ht40_channel_pair(iface);
+ if (!res) {
+ iface->conf->secondary_channel = 0;
+ wpa_printf(MSG_INFO, "Fallback to 20 MHz");
}
+ hostapd_setup_interface_complete(iface, !res);
+}
+
+
+static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface,
+ struct wpa_driver_scan_params *params)
+{
+ /* Scan only the affected frequency range */
+ int pri_freq, sec_freq;
+ int affected_start, affected_end;
+ int i, pos;
+ struct hostapd_hw_modes *mode;
+
+ if (iface->current_mode == NULL)
+ return;
+
+ pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
+ if (iface->conf->secondary_channel > 0)
+ sec_freq = pri_freq + 20;
+ else
+ sec_freq = pri_freq - 20;
+ /*
+ * Note: Need to find the PRI channel also in cases where the affected
+ * channel is the SEC channel of a 40 MHz BSS, so need to include the
+ * scanning coverage here to be 40 MHz from the center frequency.
+ */
+ affected_start = (pri_freq + sec_freq) / 2 - 40;
+ affected_end = (pri_freq + sec_freq) / 2 + 40;
+ wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
+ affected_start, affected_end);
+
+ mode = iface->current_mode;
+ params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
+ if (params->freqs == NULL)
+ return;
+ pos = 0;
+
+ for (i = 0; i < mode->num_channels; i++) {
+ struct hostapd_channel_data *chan = &mode->channels[i];
+ if (chan->flag & HOSTAPD_CHAN_DISABLED)
+ continue;
+ if (chan->freq < affected_start ||
+ chan->freq > affected_end)
+ continue;
+ params->freqs[pos++] = chan->freq;
+ }
+}
+
+
+static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface,
+ struct wpa_driver_scan_params *params)
+{
+ /* Scan only the affected frequency range */
+ int pri_freq;
+ int affected_start, affected_end;
+ int i, pos;
+ struct hostapd_hw_modes *mode;
+
+ if (iface->current_mode == NULL)
+ return;
+
+ pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
+ if (iface->conf->secondary_channel > 0) {
+ affected_start = pri_freq - 10;
+ affected_end = pri_freq + 30;
+ } else {
+ affected_start = pri_freq - 30;
+ affected_end = pri_freq + 10;
+ }
+ wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
+ affected_start, affected_end);
+
+ mode = iface->current_mode;
+ params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
+ if (params->freqs == NULL)
+ return;
+ pos = 0;
+
+ for (i = 0; i < mode->num_channels; i++) {
+ struct hostapd_channel_data *chan = &mode->channels[i];
+ if (chan->flag & HOSTAPD_CHAN_DISABLED)
+ continue;
+ if (chan->freq < affected_start ||
+ chan->freq > affected_end)
+ continue;
+ params->freqs[pos++] = chan->freq;
+ }
+}
+
+
+static void ap_ht40_scan_retry(void *eloop_data, void *user_data)
+{
+#define HT2040_COEX_SCAN_RETRY 15
+ struct hostapd_iface *iface = eloop_data;
+ struct wpa_driver_scan_params params;
+ int ret;
+
+ os_memset(¶ms, 0, sizeof(params));
+ if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
+ ieee80211n_scan_channels_2g4(iface, ¶ms);
+ else
+ ieee80211n_scan_channels_5g(iface, ¶ms);
+
+ ret = hostapd_driver_scan(iface->bss[0], ¶ms);
+ iface->num_ht40_scan_tries++;
+ os_free(params.freqs);
+
+ if (ret == -EBUSY &&
+ iface->num_ht40_scan_tries < HT2040_COEX_SCAN_RETRY) {
+ wpa_printf(MSG_ERROR,
+ "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again (attempt %d)",
+ ret, strerror(-ret), iface->num_ht40_scan_tries);
+ eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
+ return;
+ }
+
+ if (ret == 0) {
+ iface->scan_cb = ieee80211n_check_scan;
+ return;
+ }
+
+ wpa_printf(MSG_DEBUG,
+ "Failed to request a scan in device, bringing up in HT20 mode");
+ iface->conf->secondary_channel = 0;
+ iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
hostapd_setup_interface_complete(iface, 0);
}
+void hostapd_stop_setup_timers(struct hostapd_iface *iface)
+{
+ eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
+}
+
+
static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
{
struct wpa_driver_scan_params params;
+ int ret;
if (!iface->conf->secondary_channel)
return 0; /* HT40 not used */
+ hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "
"40 MHz channel");
os_memset(¶ms, 0, sizeof(params));
- /* TODO: scan only the needed frequency */
- if (hostapd_driver_scan(iface->bss[0], ¶ms) < 0) {
- wpa_printf(MSG_ERROR, "Failed to request a scan of "
- "neighboring BSSes");
+ if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
+ ieee80211n_scan_channels_2g4(iface, ¶ms);
+ else
+ ieee80211n_scan_channels_5g(iface, ¶ms);
+
+ ret = hostapd_driver_scan(iface->bss[0], ¶ms);
+ os_free(params.freqs);
+
+ if (ret == -EBUSY) {
+ wpa_printf(MSG_ERROR,
+ "Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again",
+ ret, strerror(-ret));
+ iface->num_ht40_scan_tries = 1;
+ eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
+ eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
+ return 1;
+ }
+
+ if (ret < 0) {
+ wpa_printf(MSG_ERROR,
+ "Failed to request a scan of neighboring BSSes ret=%d (%s)",
+ ret, strerror(-ret));
return -1;
}
u16 hw = iface->current_mode->ht_capab;
u16 conf = iface->conf->ht_capab;
- if (!iface->conf->ieee80211n)
- return 1;
-
if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) &&
!(hw & HT_CAP_INFO_LDPC_CODING_CAP)) {
wpa_printf(MSG_ERROR, "Driver does not support configured "
return 0;
}
- if ((conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
+ /*
+ * Driver ACS chosen channel may not be HT40 due to internal driver
+ * restrictions.
+ */
+ if (!iface->conf->acs && (conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
!(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
wpa_printf(MSG_ERROR, "Driver does not support configured "
"HT capability [HT40*]");
return 0;
}
- if ((conf & HT_CAP_INFO_SMPS_MASK) != (hw & HT_CAP_INFO_SMPS_MASK) &&
- (conf & HT_CAP_INFO_SMPS_MASK) != HT_CAP_INFO_SMPS_DISABLED) {
- wpa_printf(MSG_ERROR, "Driver does not support configured "
- "HT capability [SMPS-*]");
- return 0;
+ switch (conf & HT_CAP_INFO_SMPS_MASK) {
+ case HT_CAP_INFO_SMPS_STATIC:
+ if (!(iface->smps_modes & WPA_DRIVER_SMPS_MODE_STATIC)) {
+ wpa_printf(MSG_ERROR,
+ "Driver does not support configured HT capability [SMPS-STATIC]");
+ return 0;
+ }
+ break;
+ case HT_CAP_INFO_SMPS_DYNAMIC:
+ if (!(iface->smps_modes & WPA_DRIVER_SMPS_MODE_DYNAMIC)) {
+ wpa_printf(MSG_ERROR,
+ "Driver does not support configured HT capability [SMPS-DYNAMIC]");
+ return 0;
+ }
+ break;
+ case HT_CAP_INFO_SMPS_DISABLED:
+ default:
+ break;
}
if ((conf & HT_CAP_INFO_GREEN_FIELD) &&
return 0;
}
- if ((conf & HT_CAP_INFO_PSMP_SUPP) && !(hw & HT_CAP_INFO_PSMP_SUPP)) {
- wpa_printf(MSG_ERROR, "Driver does not support configured "
- "HT capability [PSMP]");
- return 0;
- }
-
if ((conf & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT) &&
!(hw & HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT)) {
wpa_printf(MSG_ERROR, "Driver does not support configured "
return 1;
}
+
+#ifdef CONFIG_IEEE80211AC
+
+static int ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap, const char *name)
+{
+ u32 req_cap = conf & cap;
+
+ /*
+ * Make sure we support all requested capabilities.
+ * NOTE: We assume that 'cap' represents a capability mask,
+ * not a discrete value.
+ */
+ if ((hw & req_cap) != req_cap) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured VHT capability [%s]",
+ name);
+ return 0;
+ }
+ return 1;
+}
+
+
+static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 mask,
+ unsigned int shift,
+ const char *name)
+{
+ u32 hw_max = hw & mask;
+ u32 conf_val = conf & mask;
+
+ if (conf_val > hw_max) {
+ wpa_printf(MSG_ERROR, "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)",
+ name, conf_val >> shift, hw_max >> shift);
+ return 0;
+ }
+ return 1;
+}
+
+
+static int ieee80211ac_supported_vht_capab(struct hostapd_iface *iface)
+{
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ u32 hw = mode->vht_capab;
+ u32 conf = iface->conf->vht_capab;
+
+ wpa_printf(MSG_DEBUG, "hw vht capab: 0x%x, conf vht capab: 0x%x",
+ hw, conf);
+
+ if (mode->mode == HOSTAPD_MODE_IEEE80211G &&
+ iface->conf->bss[0]->vendor_vht &&
+ mode->vht_capab == 0 && iface->hw_features) {
+ int i;
+
+ for (i = 0; i < iface->num_hw_features; i++) {
+ if (iface->hw_features[i].mode ==
+ HOSTAPD_MODE_IEEE80211A) {
+ mode = &iface->hw_features[i];
+ hw = mode->vht_capab;
+ wpa_printf(MSG_DEBUG,
+ "update hw vht capab based on 5 GHz band: 0x%x",
+ hw);
+ break;
+ }
+ }
+ }
+
+#define VHT_CAP_CHECK(cap) \
+ do { \
+ if (!ieee80211ac_cap_check(hw, conf, cap, #cap)) \
+ return 0; \
+ } while (0)
+
+#define VHT_CAP_CHECK_MAX(cap) \
+ do { \
+ if (!ieee80211ac_cap_check_max(hw, conf, cap, cap ## _SHIFT, \
+ #cap)) \
+ return 0; \
+ } while (0)
+
+ VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK);
+ VHT_CAP_CHECK(VHT_CAP_SUPP_CHAN_WIDTH_160MHZ);
+ VHT_CAP_CHECK(VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ);
+ VHT_CAP_CHECK(VHT_CAP_RXLDPC);
+ VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80);
+ VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160);
+ VHT_CAP_CHECK(VHT_CAP_TXSTBC);
+ VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK);
+ VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE);
+ VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE);
+ VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX);
+ VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX);
+ VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE);
+ VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE);
+ VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS);
+ VHT_CAP_CHECK(VHT_CAP_HTC_VHT);
+ VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX);
+ VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB);
+ VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB);
+ VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN);
+ VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN);
+
+#undef VHT_CAP_CHECK
+#undef VHT_CAP_CHECK_MAX
+
+ return 1;
+}
+#endif /* CONFIG_IEEE80211AC */
+
#endif /* CONFIG_IEEE80211N */
{
#ifdef CONFIG_IEEE80211N
int ret;
+ if (!iface->conf->ieee80211n)
+ return 0;
+
+ if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211B &&
+ iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G &&
+ (iface->conf->ht_capab & HT_CAP_INFO_DSSS_CCK40MHZ)) {
+ wpa_printf(MSG_DEBUG,
+ "Disable HT capability [DSSS_CCK-40] on 5 GHz band");
+ iface->conf->ht_capab &= ~HT_CAP_INFO_DSSS_CCK40MHZ;
+ }
+
+ if (!ieee80211n_supported_ht_capab(iface))
+ return -1;
+#ifdef CONFIG_IEEE80211AC
+ if (!ieee80211ac_supported_vht_capab(iface))
+ return -1;
+#endif /* CONFIG_IEEE80211AC */
ret = ieee80211n_check_40mhz(iface);
if (ret)
return ret;
if (!ieee80211n_allowed_ht40_channel_pair(iface))
return -1;
- if (!ieee80211n_supported_ht_capab(iface))
- return -1;
#endif /* CONFIG_IEEE80211N */
return 0;
}
+static int hostapd_is_usable_chan(struct hostapd_iface *iface,
+ int channel, int primary)
+{
+ int i;
+ struct hostapd_channel_data *chan;
+
+ if (!iface->current_mode)
+ return 0;
+
+ for (i = 0; i < iface->current_mode->num_channels; i++) {
+ chan = &iface->current_mode->channels[i];
+ if (chan->chan != channel)
+ continue;
+
+ if (!(chan->flag & HOSTAPD_CHAN_DISABLED))
+ return 1;
+
+ wpa_printf(MSG_DEBUG,
+ "%schannel [%i] (%i) is disabled for use in AP mode, flags: 0x%x%s%s",
+ primary ? "" : "Configured HT40 secondary ",
+ i, chan->chan, chan->flag,
+ chan->flag & HOSTAPD_CHAN_NO_IR ? " NO-IR" : "",
+ chan->flag & HOSTAPD_CHAN_RADAR ? " RADAR" : "");
+ }
+
+ return 0;
+}
+
+
+static int hostapd_is_usable_chans(struct hostapd_iface *iface)
+{
+ if (!hostapd_is_usable_chan(iface, iface->conf->channel, 1))
+ return 0;
+
+ if (!iface->conf->secondary_channel)
+ return 1;
+
+ return hostapd_is_usable_chan(iface, iface->conf->channel +
+ iface->conf->secondary_channel * 4, 0);
+}
+
+
+static enum hostapd_chan_status
+hostapd_check_chans(struct hostapd_iface *iface)
+{
+ if (iface->conf->channel) {
+ if (hostapd_is_usable_chans(iface))
+ return HOSTAPD_CHAN_VALID;
+ else
+ return HOSTAPD_CHAN_INVALID;
+ }
+
+ /*
+ * The user set channel=0 or channel=acs_survey
+ * which is used to trigger ACS.
+ */
+
+ switch (acs_init(iface)) {
+ case HOSTAPD_CHAN_ACS:
+ return HOSTAPD_CHAN_ACS;
+ case HOSTAPD_CHAN_VALID:
+ case HOSTAPD_CHAN_INVALID:
+ default:
+ return HOSTAPD_CHAN_INVALID;
+ }
+}
+
+
+static void hostapd_notify_bad_chans(struct hostapd_iface *iface)
+{
+ if (!iface->current_mode) {
+ hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_WARNING,
+ "Hardware does not support configured mode");
+ return;
+ }
+ hostapd_logger(iface->bss[0], NULL,
+ HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_WARNING,
+ "Configured channel (%d) not found from the "
+ "channel list of current mode (%d) %s",
+ iface->conf->channel,
+ iface->current_mode->mode,
+ hostapd_hw_mode_txt(iface->current_mode->mode));
+ hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_WARNING,
+ "Hardware does not support configured channel");
+}
+
+
+int hostapd_acs_completed(struct hostapd_iface *iface, int err)
+{
+ int ret = -1;
+
+ if (err)
+ goto out;
+
+ switch (hostapd_check_chans(iface)) {
+ case HOSTAPD_CHAN_VALID:
+ wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO,
+ ACS_EVENT_COMPLETED "freq=%d channel=%d",
+ hostapd_hw_get_freq(iface->bss[0],
+ iface->conf->channel),
+ iface->conf->channel);
+ break;
+ case HOSTAPD_CHAN_ACS:
+ wpa_printf(MSG_ERROR, "ACS error - reported complete, but no result available");
+ wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
+ hostapd_notify_bad_chans(iface);
+ goto out;
+ case HOSTAPD_CHAN_INVALID:
+ default:
+ wpa_printf(MSG_ERROR, "ACS picked unusable channels");
+ wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_FAILED);
+ hostapd_notify_bad_chans(iface);
+ goto out;
+ }
+
+ ret = hostapd_check_ht_capab(iface);
+ if (ret < 0)
+ goto out;
+ if (ret == 1) {
+ wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback");
+ return 0;
+ }
+
+ ret = 0;
+out:
+ return hostapd_setup_interface_complete(iface, ret);
+}
+
+
/**
* hostapd_select_hw_mode - Select the hardware mode
* @iface: Pointer to interface data.
- * Returns: 0 on success, -1 on failure
+ * Returns: 0 on success, < 0 on failure
*
* Sets up the hardware mode, channel, rates, and passive scanning
* based on the configuration.
*/
int hostapd_select_hw_mode(struct hostapd_iface *iface)
{
- int i, j, ok;
+ int i;
if (iface->num_hw_features < 1)
return -1;
+ if ((iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211G ||
+ iface->conf->ieee80211n || iface->conf->ieee80211ac) &&
+ iface->conf->channel == 14) {
+ wpa_printf(MSG_INFO, "Disable OFDM/HT/VHT on channel 14");
+ iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211B;
+ iface->conf->ieee80211n = 0;
+ iface->conf->ieee80211ac = 0;
+ }
+
iface->current_mode = NULL;
for (i = 0; i < iface->num_hw_features; i++) {
struct hostapd_hw_modes *mode = &iface->hw_features[i];
}
if (iface->current_mode == NULL) {
- wpa_printf(MSG_ERROR, "Hardware does not support configured "
- "mode");
- hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
- HOSTAPD_LEVEL_WARNING,
- "Hardware does not support configured mode "
- "(%d)", (int) iface->conf->hw_mode);
- return -1;
- }
-
- ok = 0;
- for (j = 0; j < iface->current_mode->num_channels; j++) {
- struct hostapd_channel_data *chan =
- &iface->current_mode->channels[j];
- if (!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
- (chan->chan == iface->conf->channel)) {
- ok = 1;
- break;
+ if (!(iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) ||
+ !(iface->drv_flags & WPA_DRIVER_FLAGS_SUPPORT_HW_MODE_ANY))
+ {
+ wpa_printf(MSG_ERROR,
+ "Hardware does not support configured mode");
+ hostapd_logger(iface->bss[0], NULL,
+ HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_WARNING,
+ "Hardware does not support configured mode (%d) (hw_mode in hostapd.conf)",
+ (int) iface->conf->hw_mode);
+ return -2;
}
}
- if (iface->conf->channel == 0) {
- /* TODO: could request a scan of neighboring BSSes and select
- * the channel automatically */
- wpa_printf(MSG_ERROR, "Channel not configured "
- "(hw_mode/channel in hostapd.conf)");
- return -1;
- }
- if (ok == 0 && iface->conf->channel != 0) {
- hostapd_logger(iface->bss[0], NULL,
- HOSTAPD_MODULE_IEEE80211,
- HOSTAPD_LEVEL_WARNING,
- "Configured channel (%d) not found from the "
- "channel list of current mode (%d) %s",
- iface->conf->channel,
- iface->current_mode->mode,
- hostapd_hw_mode_txt(iface->current_mode->mode));
- iface->current_mode = NULL;
- }
-
- if (iface->current_mode == NULL) {
- hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
- HOSTAPD_LEVEL_WARNING,
- "Hardware does not support configured channel");
- return -1;
- }
- if (hostapd_prepare_rates(iface->bss[0], iface->current_mode)) {
- wpa_printf(MSG_ERROR, "Failed to prepare rates table.");
- hostapd_logger(iface->bss[0], NULL, HOSTAPD_MODULE_IEEE80211,
- HOSTAPD_LEVEL_WARNING,
- "Failed to prepare rates table.");
- return -1;
+ switch (hostapd_check_chans(iface)) {
+ case HOSTAPD_CHAN_VALID:
+ return 0;
+ case HOSTAPD_CHAN_ACS: /* ACS will run and later complete */
+ return 1;
+ case HOSTAPD_CHAN_INVALID:
+ default:
+ hostapd_notify_bad_chans(iface);
+ return -3;
}
-
- return 0;
}
return "IEEE 802.11b";
case HOSTAPD_MODE_IEEE80211G:
return "IEEE 802.11g";
+ case HOSTAPD_MODE_IEEE80211AD:
+ return "IEEE 802.11ad";
default:
return "UNKNOWN";
}
int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan)
{
- int i;
-
- if (!hapd->iface->current_mode)
- return 0;
-
- for (i = 0; i < hapd->iface->current_mode->num_channels; i++) {
- struct hostapd_channel_data *ch =
- &hapd->iface->current_mode->channels[i];
- if (ch->chan == chan)
- return ch->freq;
- }
-
- return 0;
+ return hw_get_freq(hapd->iface->current_mode, chan);
}
int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq)
{
- int i;
-
- if (!hapd->iface->current_mode)
- return 0;
-
- for (i = 0; i < hapd->iface->current_mode->num_channels; i++) {
- struct hostapd_channel_data *ch =
- &hapd->iface->current_mode->channels[i];
- if (ch->freq == freq)
- return ch->chan;
- }
-
- return 0;
+ return hw_get_chan(hapd->iface->current_mode, freq);
}
projects / mech_eap.git / blobdiff