63e1940432
Signed-off-by: Shashidhar Lakkavalli <slakkavalli@datto.com> Signed-off-by: John Crispin <john@phrozen.org>
971 lines
25 KiB
C
971 lines
25 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) 2008-2012, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README 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 "common/wpa_ctrl.h"
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#include "common/hw_features_common.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 "acs.h"
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#include "ieee802_11.h"
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#include "beacon.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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#ifndef CONFIG_NO_STDOUT_DEBUG
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static char * dfs_info(struct hostapd_channel_data *chan)
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{
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static char info[256];
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char *state;
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switch (chan->flag & HOSTAPD_CHAN_DFS_MASK) {
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case HOSTAPD_CHAN_DFS_UNKNOWN:
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state = "unknown";
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break;
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case HOSTAPD_CHAN_DFS_USABLE:
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state = "usable";
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break;
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case HOSTAPD_CHAN_DFS_UNAVAILABLE:
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state = "unavailable";
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break;
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case HOSTAPD_CHAN_DFS_AVAILABLE:
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state = "available";
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break;
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default:
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return "";
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}
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os_snprintf(info, sizeof(info), " (DFS state = %s)", state);
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info[sizeof(info) - 1] = '\0';
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return info;
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}
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#endif /* CONFIG_NO_STDOUT_DEBUG */
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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 i, j;
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u16 num_modes, flags;
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struct hostapd_hw_modes *modes;
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u8 dfs_domain;
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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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&dfs_domain);
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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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iface->dfs_domain = dfs_domain;
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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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int dfs_enabled = hapd->iconf->ieee80211h &&
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(iface->drv_flags & WPA_DRIVER_FLAGS_RADAR);
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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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int dfs = 0;
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/*
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* Disable all channels that are marked not to allow
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* to initiate radiation (a.k.a. passive scan and no
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* IBSS).
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* Use radar channels only if the driver supports DFS.
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*/
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if ((feature->channels[j].flag &
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HOSTAPD_CHAN_RADAR) && dfs_enabled) {
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dfs = 1;
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} else if (((feature->channels[j].flag &
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HOSTAPD_CHAN_RADAR) &&
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!(iface->drv_flags &
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WPA_DRIVER_FLAGS_DFS_OFFLOAD)) ||
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(feature->channels[j].flag &
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HOSTAPD_CHAN_NO_IR)) {
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feature->channels[j].flag |=
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HOSTAPD_CHAN_DISABLED;
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}
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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%s",
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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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dfs ? dfs_info(&feature->channels[j]) : "");
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}
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}
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return 0;
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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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case HOSTAPD_MODE_IEEE80211AD:
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return 0; /* No basic rates for 11ad */
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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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if (i)
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i++; /* -1 termination */
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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_calloc(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 pri_chan, sec_chan;
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pri_chan = iface->conf->channel;
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sec_chan = pri_chan + iface->conf->secondary_channel * 4;
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return allowed_ht40_channel_pair(iface->current_mode, pri_chan,
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sec_chan);
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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 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;
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int res;
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pri_chan = iface->conf->channel;
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sec_chan = pri_chan + iface->conf->secondary_channel * 4;
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res = check_40mhz_5g(iface->current_mode, scan_res, pri_chan, sec_chan);
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if (res == 2) {
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if (iface->conf->no_pri_sec_switch) {
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wpa_printf(MSG_DEBUG,
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"Cannot switch PRI/SEC channels due to local constraint");
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} else {
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ieee80211n_switch_pri_sec(iface);
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}
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}
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return !!res;
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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_chan, sec_chan;
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pri_chan = iface->conf->channel;
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sec_chan = pri_chan + iface->conf->secondary_channel * 4;
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return check_40mhz_2g4(iface->current_mode, scan_res, pri_chan,
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sec_chan);
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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 Std 802.11-2012, 10.15.3.2 */
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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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iface->secondary_ch = iface->conf->secondary_channel;
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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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if (iface->drv_flags & WPA_DRIVER_FLAGS_HT_2040_COEX) {
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/*
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* TODO: Could consider scheduling another scan to check
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* if channel width can be changed if no coex reports
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* are received from associating stations.
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*/
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}
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}
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res = ieee80211n_allowed_ht40_channel_pair(iface);
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if (!res) {
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iface->conf->secondary_channel = 0;
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hostapd_set_oper_centr_freq_seg0_idx(iface->conf, 0);
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hostapd_set_oper_centr_freq_seg1_idx(iface->conf, 0);
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hostapd_set_oper_chwidth(iface->conf, CHANWIDTH_USE_HT);
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res = 1;
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wpa_printf(MSG_INFO, "Fallback to 20 MHz");
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}
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hostapd_setup_interface_complete(iface, !res);
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}
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static void ieee80211n_scan_channels_2g4(struct hostapd_iface *iface,
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struct wpa_driver_scan_params *params)
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{
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/* Scan only the affected frequency range */
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int pri_freq, sec_freq;
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int affected_start, affected_end;
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int i, pos;
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struct hostapd_hw_modes *mode;
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if (iface->current_mode == NULL)
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return;
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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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/*
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* Note: Need to find the PRI channel also in cases where the affected
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* channel is the SEC channel of a 40 MHz BSS, so need to include the
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* scanning coverage here to be 40 MHz from the center frequency.
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*/
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affected_start = (pri_freq + sec_freq) / 2 - 40;
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affected_end = (pri_freq + sec_freq) / 2 + 40;
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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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mode = iface->current_mode;
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params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
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if (params->freqs == NULL)
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return;
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pos = 0;
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for (i = 0; i < mode->num_channels; i++) {
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struct hostapd_channel_data *chan = &mode->channels[i];
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if (chan->flag & HOSTAPD_CHAN_DISABLED)
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continue;
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if (chan->freq < affected_start ||
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chan->freq > affected_end)
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continue;
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params->freqs[pos++] = chan->freq;
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}
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}
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static void ieee80211n_scan_channels_5g(struct hostapd_iface *iface,
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struct wpa_driver_scan_params *params)
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{
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/* Scan only the affected frequency range */
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int pri_freq;
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int affected_start, affected_end;
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int i, pos;
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struct hostapd_hw_modes *mode;
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if (iface->current_mode == NULL)
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return;
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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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affected_start = pri_freq - 10;
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affected_end = pri_freq + 30;
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} else {
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affected_start = pri_freq - 30;
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affected_end = pri_freq + 10;
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}
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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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mode = iface->current_mode;
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params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
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if (params->freqs == NULL)
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return;
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pos = 0;
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for (i = 0; i < mode->num_channels; i++) {
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struct hostapd_channel_data *chan = &mode->channels[i];
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if (chan->flag & HOSTAPD_CHAN_DISABLED)
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continue;
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if (chan->freq < affected_start ||
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chan->freq > affected_end)
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continue;
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params->freqs[pos++] = chan->freq;
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}
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}
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static void ap_ht40_scan_retry(void *eloop_data, void *user_data)
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{
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#define HT2040_COEX_SCAN_RETRY 15
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struct hostapd_iface *iface = eloop_data;
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struct wpa_driver_scan_params params;
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int ret;
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os_memset(¶ms, 0, sizeof(params));
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if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
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ieee80211n_scan_channels_2g4(iface, ¶ms);
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else
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ieee80211n_scan_channels_5g(iface, ¶ms);
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ret = hostapd_driver_scan(iface->bss[0], ¶ms);
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iface->num_ht40_scan_tries++;
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os_free(params.freqs);
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if (ret == -EBUSY &&
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iface->num_ht40_scan_tries < HT2040_COEX_SCAN_RETRY) {
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wpa_printf(MSG_ERROR,
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"Failed to request a scan of neighboring BSSes ret=%d (%s) - try to scan again (attempt %d)",
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ret, strerror(-ret), iface->num_ht40_scan_tries);
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eloop_register_timeout(1, 0, ap_ht40_scan_retry, iface, NULL);
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return;
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}
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if (ret == 0) {
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iface->scan_cb = ieee80211n_check_scan;
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return;
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}
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wpa_printf(MSG_DEBUG,
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"Failed to request a scan in device, bringing up in HT20 mode");
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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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hostapd_setup_interface_complete(iface, 0);
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}
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void hostapd_stop_setup_timers(struct hostapd_iface *iface)
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{
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eloop_cancel_timeout(ap_ht40_scan_retry, iface, NULL);
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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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int ret;
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/* Check that HT40 is used and PRI / SEC switch is allowed */
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if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch)
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return 0;
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hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
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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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if (iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
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ieee80211n_scan_channels_2g4(iface, ¶ms);
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else
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ieee80211n_scan_channels_5g(iface, ¶ms);
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ret = hostapd_driver_scan(iface->bss[0], ¶ms);
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os_free(params.freqs);
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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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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) &&
|
|
!(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_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;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_IEEE80211AC
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ieee80211ac_cap_check(hw, conf);
|
|
}
|
|
#endif /* CONFIG_IEEE80211AC */
|
|
|
|
|
|
#ifdef CONFIG_IEEE80211AX
|
|
static int ieee80211ax_supported_he_capab(struct hostapd_iface *iface)
|
|
{
|
|
return 1;
|
|
}
|
|
#endif /* CONFIG_IEEE80211AX */
|
|
|
|
#endif /* CONFIG_IEEE80211N */
|
|
|
|
|
|
int hostapd_check_ht_capab(struct hostapd_iface *iface)
|
|
{
|
|
#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_IEEE80211AX
|
|
if (iface->conf->ieee80211ax &&
|
|
!ieee80211ax_supported_he_capab(iface))
|
|
return -1;
|
|
#endif /* CONFIG_IEEE80211AX */
|
|
#ifdef CONFIG_IEEE80211AC
|
|
if (iface->conf->ieee80211ac &&
|
|
!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;
|
|
#endif /* CONFIG_IEEE80211N */
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int hostapd_is_usable_chan(struct hostapd_iface *iface,
|
|
int channel, int primary)
|
|
{
|
|
struct hostapd_channel_data *chan;
|
|
|
|
if (!iface->current_mode)
|
|
return 0;
|
|
|
|
chan = hw_get_channel_chan(iface->current_mode, channel, NULL);
|
|
if (!chan)
|
|
return 0;
|
|
|
|
if ((primary && chan_pri_allowed(chan)) ||
|
|
(!primary && !(chan->flag & HOSTAPD_CHAN_DISABLED)))
|
|
return 1;
|
|
|
|
wpa_printf(MSG_INFO,
|
|
"Channel %d (%s) not allowed for AP mode, flags: 0x%x%s%s",
|
|
channel, primary ? "primary" : "secondary",
|
|
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)
|
|
{
|
|
int secondary_chan;
|
|
struct hostapd_channel_data *pri_chan;
|
|
|
|
pri_chan = hw_get_channel_chan(iface->current_mode,
|
|
iface->conf->channel, NULL);
|
|
if (!pri_chan)
|
|
return 0;
|
|
|
|
if (!hostapd_is_usable_chan(iface, iface->conf->channel, 1))
|
|
return 0;
|
|
|
|
if (!iface->conf->secondary_channel)
|
|
return 1;
|
|
|
|
if (!iface->conf->ht40_plus_minus_allowed)
|
|
return hostapd_is_usable_chan(
|
|
iface, iface->conf->channel +
|
|
iface->conf->secondary_channel * 4, 0);
|
|
|
|
/* Both HT40+ and HT40- are set, pick a valid secondary channel */
|
|
secondary_chan = iface->conf->channel + 4;
|
|
if (hostapd_is_usable_chan(iface, secondary_chan, 0) &&
|
|
(pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) {
|
|
iface->conf->secondary_channel = 1;
|
|
return 1;
|
|
}
|
|
|
|
secondary_chan = iface->conf->channel - 4;
|
|
if (hostapd_is_usable_chan(iface, secondary_chan, 0) &&
|
|
(pri_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M)) {
|
|
iface->conf->secondary_channel = -1;
|
|
return 1;
|
|
}
|
|
|
|
return 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, < 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;
|
|
|
|
if (iface->num_hw_features < 1)
|
|
return -1;
|
|
|
|
if ((iface->conf->hw_mode == HOSTAPD_MODE_IEEE80211G ||
|
|
iface->conf->ieee80211n || iface->conf->ieee80211ac ||
|
|
iface->conf->ieee80211ax) &&
|
|
iface->conf->channel == 14) {
|
|
wpa_printf(MSG_INFO, "Disable OFDM/HT/VHT/HE on channel 14");
|
|
iface->conf->hw_mode = HOSTAPD_MODE_IEEE80211B;
|
|
iface->conf->ieee80211n = 0;
|
|
iface->conf->ieee80211ac = 0;
|
|
iface->conf->ieee80211ax = 0;
|
|
}
|
|
|
|
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) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
|
|
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";
|
|
case HOSTAPD_MODE_IEEE80211AD:
|
|
return "IEEE 802.11ad";
|
|
default:
|
|
return "UNKNOWN";
|
|
}
|
|
}
|
|
|
|
|
|
int hostapd_hw_get_freq(struct hostapd_data *hapd, int chan)
|
|
{
|
|
return hw_get_freq(hapd->iface->current_mode, chan);
|
|
}
|
|
|
|
|
|
int hostapd_hw_get_channel(struct hostapd_data *hapd, int freq)
|
|
{
|
|
int i, channel;
|
|
struct hostapd_hw_modes *mode;
|
|
|
|
if (hapd->iface->current_mode) {
|
|
channel = hw_get_chan(hapd->iface->current_mode, freq);
|
|
if (channel)
|
|
return channel;
|
|
}
|
|
|
|
/* Check other available modes since the channel list for the current
|
|
* mode did not include the specified frequency. */
|
|
if (!hapd->iface->hw_features)
|
|
return 0;
|
|
for (i = 0; i < hapd->iface->num_hw_features; i++) {
|
|
mode = &hapd->iface->hw_features[i];
|
|
channel = hw_get_chan(mode, freq);
|
|
if (channel)
|
|
return channel;
|
|
}
|
|
return 0;
|
|
}
|