753 lines
20 KiB
C
753 lines
20 KiB
C
/*
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* hostapd / Hardware feature query and different modes
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* Copyright 2002-2003, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright (c) 2008-2011, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "common/ieee802_11_defs.h"
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#include "common/ieee802_11_common.h"
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#include "drivers/driver.h"
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#include "hostapd.h"
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#include "ap_config.h"
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#include "ap_drv_ops.h"
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#include "hw_features.h"
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void hostapd_free_hw_features(struct hostapd_hw_modes *hw_features,
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size_t num_hw_features)
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{
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size_t i;
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if (hw_features == NULL)
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return;
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for (i = 0; i < num_hw_features; i++) {
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os_free(hw_features[i].channels);
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os_free(hw_features[i].rates);
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}
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os_free(hw_features);
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}
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int hostapd_get_hw_features(struct hostapd_iface *iface)
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{
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struct hostapd_data *hapd = iface->bss[0];
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int ret = 0, i, j;
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u16 num_modes, flags;
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struct hostapd_hw_modes *modes;
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if (hostapd_drv_none(hapd))
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return -1;
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modes = hostapd_get_hw_feature_data(hapd, &num_modes, &flags);
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if (modes == NULL) {
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hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
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HOSTAPD_LEVEL_DEBUG,
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"Fetching hardware channel/rate support not "
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"supported.");
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return -1;
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}
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iface->hw_flags = flags;
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hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
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iface->hw_features = modes;
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iface->num_hw_features = num_modes;
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for (i = 0; i < num_modes; i++) {
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struct hostapd_hw_modes *feature = &modes[i];
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/* set flag for channels we can use in current regulatory
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* domain */
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for (j = 0; j < feature->num_channels; j++) {
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/*
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* Disable all channels that are marked not to allow
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* IBSS operation or active scanning. In addition,
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* disable all channels that require radar detection,
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* since that (in addition to full DFS) is not yet
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* supported.
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*/
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if (feature->channels[j].flag &
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(HOSTAPD_CHAN_NO_IBSS |
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HOSTAPD_CHAN_PASSIVE_SCAN |
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HOSTAPD_CHAN_RADAR))
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feature->channels[j].flag |=
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HOSTAPD_CHAN_DISABLED;
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if (feature->channels[j].flag & HOSTAPD_CHAN_DISABLED)
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continue;
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wpa_printf(MSG_MSGDUMP, "Allowed channel: mode=%d "
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"chan=%d freq=%d MHz max_tx_power=%d dBm",
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feature->mode,
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feature->channels[j].chan,
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feature->channels[j].freq,
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feature->channels[j].max_tx_power);
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}
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}
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return ret;
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}
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int hostapd_prepare_rates(struct hostapd_iface *iface,
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struct hostapd_hw_modes *mode)
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{
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int i, num_basic_rates = 0;
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int basic_rates_a[] = { 60, 120, 240, -1 };
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int basic_rates_b[] = { 10, 20, -1 };
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int basic_rates_g[] = { 10, 20, 55, 110, -1 };
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int *basic_rates;
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if (iface->conf->basic_rates)
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basic_rates = iface->conf->basic_rates;
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else switch (mode->mode) {
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case HOSTAPD_MODE_IEEE80211A:
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basic_rates = basic_rates_a;
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break;
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case HOSTAPD_MODE_IEEE80211B:
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basic_rates = basic_rates_b;
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break;
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case HOSTAPD_MODE_IEEE80211G:
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basic_rates = basic_rates_g;
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break;
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default:
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return -1;
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}
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i = 0;
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while (basic_rates[i] >= 0)
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i++;
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os_free(iface->basic_rates);
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iface->basic_rates = os_malloc(i * sizeof(int));
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if (iface->basic_rates)
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os_memcpy(iface->basic_rates, basic_rates, i * sizeof(int));
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os_free(iface->current_rates);
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iface->num_rates = 0;
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iface->current_rates =
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os_zalloc(mode->num_rates * sizeof(struct hostapd_rate_data));
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if (!iface->current_rates) {
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wpa_printf(MSG_ERROR, "Failed to allocate memory for rate "
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"table.");
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return -1;
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}
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for (i = 0; i < mode->num_rates; i++) {
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struct hostapd_rate_data *rate;
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if (iface->conf->supported_rates &&
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!hostapd_rate_found(iface->conf->supported_rates,
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mode->rates[i]))
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continue;
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rate = &iface->current_rates[iface->num_rates];
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rate->rate = mode->rates[i];
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if (hostapd_rate_found(basic_rates, rate->rate)) {
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rate->flags |= HOSTAPD_RATE_BASIC;
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num_basic_rates++;
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}
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wpa_printf(MSG_DEBUG, "RATE[%d] rate=%d flags=0x%x",
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iface->num_rates, rate->rate, rate->flags);
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iface->num_rates++;
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}
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if ((iface->num_rates == 0 || num_basic_rates == 0) &&
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(!iface->conf->ieee80211n || !iface->conf->require_ht)) {
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wpa_printf(MSG_ERROR, "No rates remaining in supported/basic "
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"rate sets (%d,%d).",
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iface->num_rates, num_basic_rates);
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return -1;
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}
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return 0;
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}
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#ifdef CONFIG_IEEE80211N
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static int ieee80211n_allowed_ht40_channel_pair(struct hostapd_iface *iface)
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{
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int sec_chan, ok, j, first;
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int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157,
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184, 192 };
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size_t k;
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if (!iface->conf->secondary_channel)
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return 1; /* HT40 not used */
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sec_chan = iface->conf->channel + iface->conf->secondary_channel * 4;
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wpa_printf(MSG_DEBUG, "HT40: control channel: %d "
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"secondary channel: %d",
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iface->conf->channel, sec_chan);
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/* Verify that HT40 secondary channel is an allowed 20 MHz
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* channel */
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ok = 0;
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for (j = 0; j < iface->current_mode->num_channels; j++) {
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struct hostapd_channel_data *chan =
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&iface->current_mode->channels[j];
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if (!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
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chan->chan == sec_chan) {
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ok = 1;
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break;
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}
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}
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if (!ok) {
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wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed",
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sec_chan);
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return 0;
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}
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/*
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* Verify that HT40 primary,secondary channel pair is allowed per
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* IEEE 802.11n Annex J. This is only needed for 5 GHz band since
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* 2.4 GHz rules allow all cases where the secondary channel fits into
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* the list of allowed channels (already checked above).
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*/
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if (iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
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return 1;
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if (iface->conf->secondary_channel > 0)
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first = iface->conf->channel;
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else
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first = sec_chan;
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ok = 0;
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for (k = 0; k < sizeof(allowed) / sizeof(allowed[0]); k++) {
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if (first == allowed[k]) {
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ok = 1;
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break;
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}
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}
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if (!ok) {
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wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed",
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iface->conf->channel,
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iface->conf->secondary_channel);
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return 0;
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}
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return 1;
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}
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static void ieee80211n_switch_pri_sec(struct hostapd_iface *iface)
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{
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if (iface->conf->secondary_channel > 0) {
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iface->conf->channel += 4;
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iface->conf->secondary_channel = -1;
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} else {
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iface->conf->channel -= 4;
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iface->conf->secondary_channel = 1;
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}
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}
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static void ieee80211n_get_pri_sec_chan(struct wpa_scan_res *bss,
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int *pri_chan, int *sec_chan)
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{
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struct ieee80211_ht_operation *oper;
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struct ieee802_11_elems elems;
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*pri_chan = *sec_chan = 0;
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ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0);
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if (elems.ht_operation &&
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elems.ht_operation_len >= sizeof(*oper)) {
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oper = (struct ieee80211_ht_operation *) elems.ht_operation;
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*pri_chan = oper->control_chan;
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if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
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int sec = oper->ht_param &
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HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
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if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
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*sec_chan = *pri_chan + 4;
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else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
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*sec_chan = *pri_chan - 4;
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}
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}
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}
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static int ieee80211n_check_40mhz_5g(struct hostapd_iface *iface,
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struct wpa_scan_results *scan_res)
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{
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int pri_chan, sec_chan, pri_freq, sec_freq, pri_bss, sec_bss;
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int bss_pri_chan, bss_sec_chan;
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size_t i;
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int match;
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pri_chan = iface->conf->channel;
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sec_chan = iface->conf->secondary_channel * 4;
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pri_freq = hostapd_hw_get_freq(iface->bss[0], pri_chan);
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if (iface->conf->secondary_channel > 0)
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sec_freq = pri_freq + 20;
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else
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sec_freq = pri_freq - 20;
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/*
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* Switch PRI/SEC channels if Beacons were detected on selected SEC
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* channel, but not on selected PRI channel.
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*/
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pri_bss = sec_bss = 0;
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for (i = 0; i < scan_res->num; i++) {
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struct wpa_scan_res *bss = scan_res->res[i];
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if (bss->freq == pri_freq)
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pri_bss++;
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else if (bss->freq == sec_freq)
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sec_bss++;
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}
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if (sec_bss && !pri_bss) {
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wpa_printf(MSG_INFO, "Switch own primary and secondary "
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"channel to get secondary channel with no Beacons "
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"from other BSSes");
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ieee80211n_switch_pri_sec(iface);
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}
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/*
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* Match PRI/SEC channel with any existing HT40 BSS on the same
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* channels that we are about to use (if already mixed order in
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* existing BSSes, use own preference).
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*/
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match = 0;
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for (i = 0; i < scan_res->num; i++) {
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struct wpa_scan_res *bss = scan_res->res[i];
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ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan);
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if (pri_chan == bss_pri_chan &&
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sec_chan == bss_sec_chan) {
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match = 1;
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break;
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}
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}
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if (!match) {
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for (i = 0; i < scan_res->num; i++) {
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struct wpa_scan_res *bss = scan_res->res[i];
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ieee80211n_get_pri_sec_chan(bss, &bss_pri_chan,
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&bss_sec_chan);
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if (pri_chan == bss_sec_chan &&
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sec_chan == bss_pri_chan) {
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wpa_printf(MSG_INFO, "Switch own primary and "
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"secondary channel due to BSS "
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"overlap with " MACSTR,
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MAC2STR(bss->bssid));
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ieee80211n_switch_pri_sec(iface);
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break;
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}
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}
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}
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return 1;
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}
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static int ieee80211n_check_40mhz_2g4(struct hostapd_iface *iface,
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struct wpa_scan_results *scan_res)
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{
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int pri_freq, sec_freq;
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int affected_start, affected_end;
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size_t i;
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pri_freq = hostapd_hw_get_freq(iface->bss[0], iface->conf->channel);
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if (iface->conf->secondary_channel > 0)
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sec_freq = pri_freq + 20;
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else
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sec_freq = pri_freq - 20;
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affected_start = (pri_freq + sec_freq) / 2 - 25;
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affected_end = (pri_freq + sec_freq) / 2 + 25;
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wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz",
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affected_start, affected_end);
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for (i = 0; i < scan_res->num; i++) {
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struct wpa_scan_res *bss = scan_res->res[i];
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int pri = bss->freq;
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int sec = pri;
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int sec_chan, pri_chan;
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ieee80211n_get_pri_sec_chan(bss, &pri_chan, &sec_chan);
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if (sec_chan) {
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if (sec_chan < pri_chan)
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sec = pri - 20;
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else
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sec = pri + 20;
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}
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if ((pri < affected_start || pri > affected_end) &&
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(sec < affected_start || sec > affected_end))
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continue; /* not within affected channel range */
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wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR
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" freq=%d pri=%d sec=%d",
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MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan);
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if (sec_chan) {
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if (pri_freq != pri || sec_freq != sec) {
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wpa_printf(MSG_DEBUG, "40 MHz pri/sec "
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"mismatch with BSS " MACSTR
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" <%d,%d> (chan=%d%c) vs. <%d,%d>",
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MAC2STR(bss->bssid),
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pri, sec, pri_chan,
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sec > pri ? '+' : '-',
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pri_freq, sec_freq);
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return 0;
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}
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}
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/* TODO: 40 MHz intolerant */
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}
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return 1;
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}
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static void ieee80211n_check_scan(struct hostapd_iface *iface)
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{
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struct wpa_scan_results *scan_res;
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int oper40;
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int res;
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/* Check list of neighboring BSSes (from scan) to see whether 40 MHz is
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* allowed per IEEE 802.11n/D7.0, 11.14.3.2 */
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iface->scan_cb = NULL;
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scan_res = hostapd_driver_get_scan_results(iface->bss[0]);
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if (scan_res == NULL) {
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hostapd_setup_interface_complete(iface, 1);
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return;
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}
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if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A)
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oper40 = ieee80211n_check_40mhz_5g(iface, scan_res);
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else
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oper40 = ieee80211n_check_40mhz_2g4(iface, scan_res);
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wpa_scan_results_free(scan_res);
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if (!oper40) {
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wpa_printf(MSG_INFO, "20/40 MHz operation not permitted on "
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"channel pri=%d sec=%d based on overlapping BSSes",
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iface->conf->channel,
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iface->conf->channel +
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iface->conf->secondary_channel * 4);
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iface->conf->secondary_channel = 0;
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iface->conf->ht_capab &= ~HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET;
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}
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res = ieee80211n_allowed_ht40_channel_pair(iface);
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hostapd_setup_interface_complete(iface, !res);
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}
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static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
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{
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struct wpa_driver_scan_params params;
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if (!iface->conf->secondary_channel)
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return 0; /* HT40 not used */
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wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "
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"40 MHz channel");
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os_memset(¶ms, 0, sizeof(params));
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/* TODO: scan only the needed frequency */
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if (hostapd_driver_scan(iface->bss[0], ¶ms) < 0) {
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wpa_printf(MSG_ERROR, "Failed to request a scan of "
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"neighboring BSSes");
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return -1;
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}
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iface->scan_cb = ieee80211n_check_scan;
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return 1;
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}
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static int ieee80211n_supported_ht_capab(struct hostapd_iface *iface)
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{
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u16 hw = iface->current_mode->ht_capab;
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u16 conf = iface->conf->ht_capab;
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if ((conf & HT_CAP_INFO_LDPC_CODING_CAP) &&
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!(hw & HT_CAP_INFO_LDPC_CODING_CAP)) {
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wpa_printf(MSG_ERROR, "Driver does not support configured "
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"HT capability [LDPC]");
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return 0;
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}
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if ((conf & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET) &&
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!(hw & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
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wpa_printf(MSG_ERROR, "Driver does not support configured "
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"HT capability [HT40*]");
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return 0;
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}
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if ((conf & HT_CAP_INFO_SMPS_MASK) != (hw & HT_CAP_INFO_SMPS_MASK) &&
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(conf & HT_CAP_INFO_SMPS_MASK) != HT_CAP_INFO_SMPS_DISABLED) {
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wpa_printf(MSG_ERROR, "Driver does not support configured "
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"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, < 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;
|
|
|
|
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) (hw_mode in hostapd.conf)",
|
|
(int) iface->conf->hw_mode);
|
|
return -2;
|
|
}
|
|
|
|
ok = 0;
|
|
for (j = 0; j < iface->current_mode->num_channels; j++) {
|
|
struct hostapd_channel_data *chan =
|
|
&iface->current_mode->channels[j];
|
|
if (chan->chan == iface->conf->channel) {
|
|
if (chan->flag & HOSTAPD_CHAN_DISABLED) {
|
|
wpa_printf(MSG_ERROR,
|
|
"channel [%i] (%i) is disabled for "
|
|
"use in AP mode, flags: 0x%x%s%s%s",
|
|
j, chan->chan, chan->flag,
|
|
chan->flag & HOSTAPD_CHAN_NO_IBSS ?
|
|
" NO-IBSS" : "",
|
|
chan->flag &
|
|
HOSTAPD_CHAN_PASSIVE_SCAN ?
|
|
" PASSIVE-SCAN" : "",
|
|
chan->flag & HOSTAPD_CHAN_RADAR ?
|
|
" RADAR" : "");
|
|
} else {
|
|
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 -3;
|
|
}
|
|
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 -4;
|
|
}
|
|
|
|
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;
|
|
}
|