wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/ap/hw_features.c b/src/ap/hw_features.c
new file mode 100644
index 0000000..f3fffd7
--- /dev/null
+++ b/src/ap/hw_features.c
@@ -0,0 +1,751 @@
+/*
+ * 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>
+ *
+ * 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.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "utils/eloop.h"
+#include "common/ieee802_11_defs.h"
+#include "common/ieee802_11_common.h"
+#include "drivers/driver.h"
+#include "hostapd.h"
+#include "ap_config.h"
+#include "ap_drv_ops.h"
+#include "hw_features.h"
+
+
+void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features,
+ size_t num_hw_features)
+{
+ size_t i;
+
+ if (hw_features == NULL)
+ return;
+
+ for (i = 0; i < num_hw_features; i++) {
+ os_free(hw_features[i].channels);
+ os_free(hw_features[i].rates);
+ }
+
+ os_free(hw_features);
+}
+
+
+int hostapd_get_hw_features(struct hostapd_iface *iface)
+{
+ struct hostapd_data *hapd = iface->bss[0];
+ int ret = 0, i, j;
+ u16 num_modes, flags;
+ struct hostapd_hw_modes *modes;
+
+ if (hostapd_drv_none(hapd))
+ return -1;
+ modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags);
+ if (modes == NULL) {
+ hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_DEBUG,
+ "Fetching hardware channel/rate support not "
+ "supported.");
+ return -1;
+ }
+
+ iface->hw_flags = flags;
+
+ hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
+ iface->hw_features = modes;
+ iface->num_hw_features = num_modes;
+
+ for (i = 0; i < num_modes; i++) {
+ struct hostapd_hw_modes *feature = &modes[i];
+ /* set flag for channels we can use in current regulatory
+ * domain */
+ for (j = 0; j < feature->num_channels; j++) {
+ /*
+ * 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.
+ */
+ if (feature->channels[j].flag &
+ (HOSTAPD_CHAN_NO_IBSS |
+ HOSTAPD_CHAN_PASSIVE_SCAN |
+ HOSTAPD_CHAN_RADAR))
+ 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",
+ feature->mode,
+ feature->channels[j].chan,
+ feature->channels[j].freq,
+ feature->channels[j].max_tx_power);
+ }
+ }
+
+ return ret;
+}
+
+
+int hostapd_prepare_rates(struct hostapd_data *hapd,
+ struct hostapd_hw_modes *mode)
+{
+ int i, num_basic_rates = 0;
+ int basic_rates_a[] = { 60, 120, 240, -1 };
+ int basic_rates_b[] = { 10, 20, -1 };
+ int basic_rates_g[] = { 10, 20, 55, 110, -1 };
+ int *basic_rates;
+
+ if (hapd->iconf->basic_rates)
+ basic_rates = hapd->iconf->basic_rates;
+ else switch (mode->mode) {
+ case HOSTAPD_MODE_IEEE80211A:
+ basic_rates = basic_rates_a;
+ break;
+ case HOSTAPD_MODE_IEEE80211B:
+ basic_rates = basic_rates_b;
+ break;
+ case HOSTAPD_MODE_IEEE80211G:
+ basic_rates = basic_rates_g;
+ break;
+ 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");
+ }
+
+ os_free(hapd->iface->current_rates);
+ hapd->iface->num_rates = 0;
+
+ hapd->iface->current_rates =
+ os_zalloc(mode->num_rates * sizeof(struct hostapd_rate_data));
+ if (!hapd->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,
+ mode->rates[i]))
+ continue;
+
+ rate = &hapd->iface->current_rates[hapd->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++;
+ }
+
+ if ((hapd->iface->num_rates == 0 || num_basic_rates == 0) &&
+ (!hapd->iconf->ieee80211n || !hapd->iconf->require_ht)) {
+ wpa_printf(MSG_ERROR, "No rates remaining in supported/basic "
+ "rate sets (%d,%d).",
+ hapd->iface->num_rates, num_basic_rates);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+#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;
+
+ 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;
+ }
+
+ return 1;
+}
+
+
+static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
+{
+ if (iface->conf->secondary_channel > 0) {
+ iface->conf->channel += 4;
+ iface->conf->secondary_channel = -1;
+ } else {
+ iface->conf->channel -= 4;
+ iface->conf->secondary_channel = 1;
+ }
+}
+
+
+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;
+
+ 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;
+
+ /*
+ * 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);
+ }
+
+ /*
+ * 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;
+ }
+ }
+ }
+
+ return 1;
+}
+
+
+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;
+
+ if (res == NULL)
+ return;
+
+ for (i = 0; i < res->num; i++)
+ os_free(res->res[i]);
+ os_free(res->res);
+ os_free(res);
+}
+
+
+static void ieee80211n_check_scan(struct hostapd_iface *iface)
+{
+ 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 */
+
+ iface->scan_cb = NULL;
+
+ scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
+ if (scan_res == NULL) {
+ hostapd_setup_interface_complete(iface, 1);
+ return;
+ }
+
+ if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
+ oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
+ else
+ oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
+ wpa_scan_results_free(scan_res);
+
+ 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->channel +
+ iface->conf->secondary_channel * 4);
+ iface->conf->secondary_channel = 0;
+ iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
+ }
+
+ res = ieee80211n_allowed_ht40_channel_pair(iface);
+ hostapd_setup_interface_complete(iface, !res);
+}
+
+
+static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
+{
+ struct wpa_driver_scan_params params;
+
+ if (!iface->conf->secondary_channel)
+ return 0; /* HT40 not used */
+
+ 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");
+ return -1;
+ }
+
+ iface->scan_cb = ieee80211n_check_scan;
+ return 1;
+}
+
+
+static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface)
+{
+ u16 hw = iface->current_mode->ht_capab;
+ u16 conf = iface->conf->ht_capab;
+
+ if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) &&
+ !(hw & HT_CAP_INFO_LDPC_CODING_CAP)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [LDPC]");
+ return 0;
+ }
+
+ if ((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;
+ }
+
+ if ((conf & HT_CAP_INFO_GREEN_FIELD) &&
+ !(hw & HT_CAP_INFO_GREEN_FIELD)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [GF]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_SHORT_GI20MHZ) &&
+ !(hw & HT_CAP_INFO_SHORT_GI20MHZ)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [SHORT-GI-20]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_SHORT_GI40MHZ) &&
+ !(hw & HT_CAP_INFO_SHORT_GI40MHZ)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [SHORT-GI-40]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_TX_STBC) && !(hw & HT_CAP_INFO_TX_STBC)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [TX-STBC]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_RX_STBC_MASK) >
+ (hw & HT_CAP_INFO_RX_STBC_MASK)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [RX-STBC*]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_DELAYED_BA) &&
+ !(hw & HT_CAP_INFO_DELAYED_BA)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [DELAYED-BA]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_MAX_AMSDU_SIZE) &&
+ !(hw & HT_CAP_INFO_MAX_AMSDU_SIZE)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [MAX-AMSDU-7935]");
+ return 0;
+ }
+
+ if ((conf & HT_CAP_INFO_DSSS_CCK40MHZ) &&
+ !(hw & HT_CAP_INFO_DSSS_CCK40MHZ)) {
+ wpa_printf(MSG_ERROR, "Driver does not support configured "
+ "HT capability [DSSS_CCK-40]");
+ 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 "
+ "HT capability [LSIG-TXOP-PROT]");
+ return 0;
+ }
+
+ return 1;
+}
+
+#endif /* CONFIG_IEEE80211N */
+
+
+int hostapd_check_ht_capab(struct hostapd_iface *iface)
+{
+#ifdef CONFIG_IEEE80211N
+ int ret;
+ if (!iface->conf->ieee80211n)
+ return 0;
+ if (!ieee80211n_supported_ht_capab(iface))
+ return -1;
+ ret = ieee80211n_check_40mhz(iface);
+ if (ret)
+ return ret;
+ if (!ieee80211n_allowed_ht40_channel_pair(iface))
+ return -1;
+#endif /* CONFIG_IEEE80211N */
+
+ return 0;
+}
+
+
+/**
+ * hostapd_select_hw_mode - Select the hardware mode
+ * @iface: Pointer to interface data.
+ * Returns: 0 on success, -1 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;
+
+ if (iface->num_hw_features < 1)
+ return -1;
+
+ iface->current_mode = NULL;
+ for (i = 0; i < iface->num_hw_features; i++) {
+ struct hostapd_hw_modes *mode = &iface->hw_features[i];
+ if (mode->mode == iface->conf->hw_mode) {
+ iface->current_mode = mode;
+ break;
+ }
+ }
+
+ 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 (ok && iface->conf->secondary_channel) {
+ int sec_ok = 0;
+ int sec_chan = iface->conf->channel +
+ iface->conf->secondary_channel * 4;
+ 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)) {
+ sec_ok = 1;
+ break;
+ }
+ }
+ if (!sec_ok) {
+ hostapd_logger(iface->bss[0], NULL,
+ HOSTAPD_MODULE_IEEE80211,
+ HOSTAPD_LEVEL_WARNING,
+ "Configured HT40 secondary channel "
+ "(%d) not found from the channel list "
+ "of current mode (%d) %s",
+ sec_chan, iface->current_mode->mode,
+ hostapd_hw_mode_txt(
+ iface->current_mode->mode));
+ ok = 0;
+ }
+ }
+ 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;
+ }
+
+ return 0;
+}
+
+
+const char * hostapd_hw_mode_txt(int mode)
+{
+ switch (mode) {
+ case HOSTAPD_MODE_IEEE80211A:
+ return "IEEE 802.11a";
+ case HOSTAPD_MODE_IEEE80211B:
+ return "IEEE 802.11b";
+ case HOSTAPD_MODE_IEEE80211G:
+ return "IEEE 802.11g";
+ 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;
+}
+
+
+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;
+}