5dabc10185
Commit 085a3fc76e ("EHT: Add 320 channel width support") added this in
various places, but it did not cover everything. Extend this support to
be more complete. In particular, this allows wpa_supplicant to report
the operating class 137 in the Supported Operating Classes element and
to use it when processing beacon requests.
Signed-off-by: Ainy Kumari <quic_ainykuma@quicinc.com>
595 lines
15 KiB
C
595 lines
15 KiB
C
/*
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* Operating classes
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* Copyright(c) 2015 Intel Deutschland GmbH
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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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 "common/ieee802_11_common.h"
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#include "wpa_supplicant_i.h"
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#include "bss.h"
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static enum chan_allowed allow_channel(struct hostapd_hw_modes *mode,
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u8 op_class, u8 chan,
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unsigned int *flags)
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{
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int i;
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bool is_6ghz = is_6ghz_op_class(op_class);
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for (i = 0; i < mode->num_channels; i++) {
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bool chan_is_6ghz;
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chan_is_6ghz = is_6ghz_freq(mode->channels[i].freq);
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if (is_6ghz == chan_is_6ghz && mode->channels[i].chan == chan)
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break;
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}
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if (i == mode->num_channels ||
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(mode->channels[i].flag & HOSTAPD_CHAN_DISABLED))
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return NOT_ALLOWED;
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if (flags)
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*flags = mode->channels[i].flag;
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if (mode->channels[i].flag & HOSTAPD_CHAN_NO_IR)
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return NO_IR;
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return ALLOWED;
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}
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static int get_center_80mhz(struct hostapd_hw_modes *mode, u8 channel,
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const u8 *center_channels, size_t num_chan)
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{
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size_t i;
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if (mode->mode != HOSTAPD_MODE_IEEE80211A)
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return 0;
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for (i = 0; i < num_chan; i++) {
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/*
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* In 80 MHz, the bandwidth "spans" 12 channels (e.g., 36-48),
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* so the center channel is 6 channels away from the start/end.
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*/
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if (channel >= center_channels[i] - 6 &&
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channel <= center_channels[i] + 6)
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return center_channels[i];
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}
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return 0;
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}
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static enum chan_allowed verify_80mhz(struct hostapd_hw_modes *mode,
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u8 op_class, u8 channel)
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{
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u8 center_chan;
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unsigned int i;
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unsigned int no_ir = 0;
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const u8 *center_channels;
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size_t num_chan;
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const u8 center_channels_5ghz[] = { 42, 58, 106, 122, 138, 155, 171 };
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const u8 center_channels_6ghz[] = { 7, 23, 39, 55, 71, 87, 103, 119,
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135, 151, 167, 183, 199, 215 };
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if (is_6ghz_op_class(op_class)) {
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center_channels = center_channels_6ghz;
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num_chan = ARRAY_SIZE(center_channels_6ghz);
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} else {
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center_channels = center_channels_5ghz;
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num_chan = ARRAY_SIZE(center_channels_5ghz);
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}
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center_chan = get_center_80mhz(mode, channel, center_channels,
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num_chan);
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if (!center_chan)
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return NOT_ALLOWED;
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/* check all the channels are available */
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for (i = 0; i < 4; i++) {
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unsigned int flags;
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u8 adj_chan = center_chan - 6 + i * 4;
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if (allow_channel(mode, op_class, adj_chan, &flags) ==
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NOT_ALLOWED)
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return NOT_ALLOWED;
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if (!(flags & HOSTAPD_CHAN_VHT_80MHZ_SUBCHANNEL))
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return NOT_ALLOWED;
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if (flags & HOSTAPD_CHAN_NO_IR)
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no_ir = 1;
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}
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if (no_ir)
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return NO_IR;
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return ALLOWED;
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}
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static int get_center_160mhz(struct hostapd_hw_modes *mode, u8 channel,
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const u8 *center_channels, size_t num_chan)
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{
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unsigned int i;
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if (mode->mode != HOSTAPD_MODE_IEEE80211A)
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return 0;
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for (i = 0; i < num_chan; i++) {
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/*
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* In 160 MHz, the bandwidth "spans" 28 channels (e.g., 36-64),
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* so the center channel is 14 channels away from the start/end.
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*/
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if (channel >= center_channels[i] - 14 &&
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channel <= center_channels[i] + 14)
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return center_channels[i];
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}
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return 0;
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}
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static enum chan_allowed verify_160mhz(struct hostapd_hw_modes *mode,
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u8 op_class, u8 channel)
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{
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u8 center_chan;
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unsigned int i;
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unsigned int no_ir = 0;
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const u8 *center_channels;
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size_t num_chan;
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const u8 center_channels_5ghz[] = { 50, 114, 163 };
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const u8 center_channels_6ghz[] = { 15, 47, 79, 111, 143, 175, 207 };
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if (is_6ghz_op_class(op_class)) {
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center_channels = center_channels_6ghz;
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num_chan = ARRAY_SIZE(center_channels_6ghz);
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} else {
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center_channels = center_channels_5ghz;
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num_chan = ARRAY_SIZE(center_channels_5ghz);
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}
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center_chan = get_center_160mhz(mode, channel, center_channels,
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num_chan);
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if (!center_chan)
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return NOT_ALLOWED;
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/* Check all the channels are available */
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for (i = 0; i < 8; i++) {
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unsigned int flags;
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u8 adj_chan = center_chan - 14 + i * 4;
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if (allow_channel(mode, op_class, adj_chan, &flags) ==
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NOT_ALLOWED)
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return NOT_ALLOWED;
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if (!(flags & HOSTAPD_CHAN_VHT_80MHZ_SUBCHANNEL) ||
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!(flags & HOSTAPD_CHAN_VHT_160MHZ_SUBCHANNEL))
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return NOT_ALLOWED;
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if (flags & HOSTAPD_CHAN_NO_IR)
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no_ir = 1;
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}
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if (no_ir)
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return NO_IR;
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return ALLOWED;
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}
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static int get_center_320mhz(struct hostapd_hw_modes *mode, u8 channel,
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const u8 *center_channels, size_t num_chan)
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{
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unsigned int i;
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if (mode->mode != HOSTAPD_MODE_IEEE80211A || !mode->is_6ghz)
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return 0;
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for (i = 0; i < num_chan; i++) {
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/*
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* In 320 MHz, the bandwidth "spans" 60 channels (e.g., 65-125),
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* so the center channel is 30 channels away from the start/end.
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*/
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if (channel >= center_channels[i] - 30 &&
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channel <= center_channels[i] + 30)
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return center_channels[i];
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}
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return 0;
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}
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static enum chan_allowed verify_320mhz(struct hostapd_hw_modes *mode,
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u8 op_class, u8 channel)
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{
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u8 center_chan;
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unsigned int i;
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bool no_ir = false;
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const u8 *center_channels;
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size_t num_chan;
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const u8 center_channels_6ghz[] = { 31, 63, 95, 127, 159, 191 };
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center_channels = center_channels_6ghz;
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num_chan = ARRAY_SIZE(center_channels_6ghz);
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center_chan = get_center_320mhz(mode, channel, center_channels,
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num_chan);
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if (!center_chan)
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return NOT_ALLOWED;
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/* Check all the channels are available */
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for (i = 0; i < 16; i++) {
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unsigned int flags;
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u8 adj_chan = center_chan - 30 + i * 4;
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if (allow_channel(mode, op_class, adj_chan, &flags) ==
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NOT_ALLOWED)
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return NOT_ALLOWED;
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if (!(flags & HOSTAPD_CHAN_EHT_320MHZ_SUBCHANNEL))
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return NOT_ALLOWED;
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if (flags & HOSTAPD_CHAN_NO_IR)
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no_ir = true;
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}
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if (no_ir)
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return NO_IR;
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return ALLOWED;
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}
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enum chan_allowed verify_channel(struct hostapd_hw_modes *mode, u8 op_class,
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u8 channel, u8 bw)
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{
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unsigned int flag = 0;
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enum chan_allowed res, res2;
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res2 = res = allow_channel(mode, op_class, channel, &flag);
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if (bw == BW40MINUS || (bw == BW40 && (((channel - 1) / 4) % 2))) {
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if (!(flag & HOSTAPD_CHAN_HT40MINUS))
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return NOT_ALLOWED;
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res2 = allow_channel(mode, op_class, channel - 4, NULL);
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} else if (bw == BW40PLUS) {
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if (!(flag & HOSTAPD_CHAN_HT40PLUS))
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return NOT_ALLOWED;
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res2 = allow_channel(mode, op_class, channel + 4, NULL);
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} else if (is_6ghz_op_class(op_class) && bw == BW40) {
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if (get_6ghz_sec_channel(channel) < 0)
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res2 = allow_channel(mode, op_class, channel - 4, NULL);
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else
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res2 = allow_channel(mode, op_class, channel + 4, NULL);
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} else if (bw == BW80) {
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/*
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* channel is a center channel and as such, not necessarily a
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* valid 20 MHz channels. Override earlier allow_channel()
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* result and use only the 80 MHz specific version.
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*/
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res2 = res = verify_80mhz(mode, op_class, channel);
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} else if (bw == BW160) {
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/*
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* channel is a center channel and as such, not necessarily a
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* valid 20 MHz channels. Override earlier allow_channel()
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* result and use only the 160 MHz specific version.
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*/
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res2 = res = verify_160mhz(mode, op_class, channel);
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} else if (bw == BW80P80) {
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/*
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* channel is a center channel and as such, not necessarily a
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* valid 20 MHz channels. Override earlier allow_channel()
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* result and use only the 80 MHz specific version.
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*/
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res2 = res = verify_80mhz(mode, op_class, channel);
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} else if (bw == BW320) {
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/*
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* channel is a center channel and as such, not necessarily a
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* valid 20 MHz channels. Override earlier allow_channel()
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* result and use only the 320 MHz specific version.
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*/
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res2= res = verify_320mhz(mode, op_class, channel);
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}
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if (res == NOT_ALLOWED || res2 == NOT_ALLOWED)
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return NOT_ALLOWED;
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if (res == NO_IR || res2 == NO_IR)
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return NO_IR;
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return ALLOWED;
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}
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static int wpas_op_class_supported(struct wpa_supplicant *wpa_s,
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struct wpa_ssid *ssid,
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const struct oper_class_map *op_class)
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{
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int chan;
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size_t i;
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struct hostapd_hw_modes *mode;
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int found;
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int z;
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int freq2 = 0;
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int freq5 = 0;
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mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op_class->mode,
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is_6ghz_op_class(op_class->op_class));
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if (!mode)
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return 0;
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/* If we are configured to disable certain things, take that into
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* account here. */
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if (ssid && ssid->freq_list && ssid->freq_list[0]) {
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for (z = 0; ; z++) {
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int f = ssid->freq_list[z];
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if (f == 0)
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break; /* end of list */
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if (f > 4000 && f < 6000)
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freq5 = 1;
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else if (f > 2400 && f < 2500)
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freq2 = 1;
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}
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} else {
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/* No frequencies specified, can use anything hardware supports.
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*/
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freq2 = freq5 = 1;
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}
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if (op_class->op_class >= 115 && op_class->op_class <= 130 && !freq5)
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return 0;
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if (op_class->op_class >= 81 && op_class->op_class <= 84 && !freq2)
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return 0;
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#ifdef CONFIG_HT_OVERRIDES
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if (ssid && ssid->disable_ht) {
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switch (op_class->op_class) {
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case 83:
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case 84:
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case 104:
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case 105:
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case 116:
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case 117:
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case 119:
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case 120:
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case 122:
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case 123:
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case 126:
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case 127:
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case 128:
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case 129:
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case 130:
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/* Disable >= 40 MHz channels if HT is disabled */
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return 0;
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}
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}
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#endif /* CONFIG_HT_OVERRIDES */
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#ifdef CONFIG_VHT_OVERRIDES
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if (ssid && ssid->disable_vht) {
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if (op_class->op_class >= 128 && op_class->op_class <= 130) {
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/* Disable >= 80 MHz channels if VHT is disabled */
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return 0;
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}
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}
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#endif /* CONFIG_VHT_OVERRIDES */
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if (op_class->op_class == 128) {
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u8 channels[] = { 42, 58, 106, 122, 138, 155, 171 };
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for (i = 0; i < ARRAY_SIZE(channels); i++) {
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if (verify_channel(mode, op_class->op_class,
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channels[i], op_class->bw) !=
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NOT_ALLOWED)
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return 1;
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}
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return 0;
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}
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if (op_class->op_class == 129) {
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/* Check if either 160 MHz channels is allowed */
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return verify_channel(mode, op_class->op_class, 50,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 114,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 163,
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op_class->bw) != NOT_ALLOWED;
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}
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if (op_class->op_class == 130) {
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/* Need at least two non-contiguous 80 MHz segments */
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found = 0;
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if (verify_channel(mode, op_class->op_class, 42,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 58,
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op_class->bw) != NOT_ALLOWED)
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found++;
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if (verify_channel(mode, op_class->op_class, 106,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 122,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 138,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 155,
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op_class->bw) != NOT_ALLOWED ||
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verify_channel(mode, op_class->op_class, 171,
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op_class->bw) != NOT_ALLOWED)
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found++;
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if (verify_channel(mode, op_class->op_class, 106,
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op_class->bw) != NOT_ALLOWED &&
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verify_channel(mode, op_class->op_class, 138,
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op_class->bw) != NOT_ALLOWED)
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found++;
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if (verify_channel(mode, op_class->op_class, 122,
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op_class->bw) != NOT_ALLOWED &&
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verify_channel(mode, op_class->op_class, 155,
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op_class->bw) != NOT_ALLOWED)
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found++;
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if (verify_channel(mode, op_class->op_class, 138,
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op_class->bw) != NOT_ALLOWED &&
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verify_channel(mode, op_class->op_class, 171,
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op_class->bw) != NOT_ALLOWED)
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found++;
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if (found >= 2)
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return 1;
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return 0;
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}
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if (op_class->op_class == 135) {
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/* Need at least two 80 MHz segments which do not fall under the
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* same 160 MHz segment to support 80+80 in 6 GHz.
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*/
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int first_seg = 0;
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int curr_seg = 0;
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for (chan = op_class->min_chan; chan <= op_class->max_chan;
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chan += op_class->inc) {
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curr_seg++;
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if (verify_channel(mode, op_class->op_class, chan,
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op_class->bw) != NOT_ALLOWED) {
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if (!first_seg) {
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first_seg = curr_seg;
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continue;
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}
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/* Supported if at least two non-consecutive 80
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* MHz segments allowed.
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*/
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if ((curr_seg - first_seg) > 1)
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return 1;
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/* Supported even if the 80 MHz segments are
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* consecutive when they do not fall under the
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* same 160 MHz segment.
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*/
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if ((first_seg % 2) == 0)
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return 1;
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}
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}
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return 0;
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}
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found = 0;
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for (chan = op_class->min_chan; chan <= op_class->max_chan;
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chan += op_class->inc) {
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if (verify_channel(mode, op_class->op_class, chan,
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op_class->bw) != NOT_ALLOWED) {
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found = 1;
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break;
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}
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}
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return found;
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}
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static int wpas_sta_secondary_channel_offset(struct wpa_bss *bss, u8 *current,
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u8 *channel)
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{
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const u8 *ies;
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u8 phy_type;
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size_t ies_len;
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if (!bss)
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return -1;
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ies = wpa_bss_ie_ptr(bss);
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ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
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return wpas_get_op_chan_phy(bss->freq, ies, ies_len, current,
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|
channel, &phy_type);
|
|
}
|
|
|
|
|
|
size_t wpas_supp_op_class_ie(struct wpa_supplicant *wpa_s,
|
|
struct wpa_ssid *ssid,
|
|
struct wpa_bss *bss, u8 *pos, size_t len)
|
|
{
|
|
struct wpabuf *buf;
|
|
u8 op, current, chan;
|
|
u8 *ie_len;
|
|
size_t res;
|
|
|
|
/*
|
|
* Determine the current operating class correct mode based on
|
|
* advertised BSS capabilities, if available. Fall back to a less
|
|
* accurate guess based on frequency if the needed IEs are not available
|
|
* or used.
|
|
*/
|
|
if (wpas_sta_secondary_channel_offset(bss, ¤t, &chan) < 0 &&
|
|
ieee80211_freq_to_channel_ext(bss->freq, 0,
|
|
CONF_OPER_CHWIDTH_USE_HT, ¤t,
|
|
&chan) == NUM_HOSTAPD_MODES)
|
|
return 0;
|
|
|
|
/*
|
|
* Need 3 bytes for EID, length, and current operating class, plus
|
|
* 1 byte for every other supported operating class.
|
|
*/
|
|
buf = wpabuf_alloc(global_op_class_size + 3);
|
|
if (!buf)
|
|
return 0;
|
|
|
|
wpabuf_put_u8(buf, WLAN_EID_SUPPORTED_OPERATING_CLASSES);
|
|
/* Will set the length later, putting a placeholder */
|
|
ie_len = wpabuf_put(buf, 1);
|
|
wpabuf_put_u8(buf, current);
|
|
|
|
for (op = 0; global_op_class[op].op_class; op++) {
|
|
if (wpas_op_class_supported(wpa_s, ssid, &global_op_class[op]))
|
|
wpabuf_put_u8(buf, global_op_class[op].op_class);
|
|
}
|
|
|
|
*ie_len = wpabuf_len(buf) - 2;
|
|
if (*ie_len < 2) {
|
|
wpa_printf(MSG_DEBUG,
|
|
"No supported operating classes IE to add");
|
|
res = 0;
|
|
} else if (wpabuf_len(buf) > len) {
|
|
wpa_printf(MSG_ERROR,
|
|
"Supported operating classes IE exceeds maximum buffer length");
|
|
res = 0;
|
|
} else {
|
|
os_memcpy(pos, wpabuf_head(buf), wpabuf_len(buf));
|
|
res = wpabuf_len(buf);
|
|
wpa_hexdump_buf(MSG_DEBUG,
|
|
"Added supported operating classes IE", buf);
|
|
}
|
|
|
|
wpabuf_free(buf);
|
|
return res;
|
|
}
|
|
|
|
|
|
int * wpas_supp_op_classes(struct wpa_supplicant *wpa_s)
|
|
{
|
|
int op;
|
|
unsigned int pos, max_num = 0;
|
|
int *classes;
|
|
|
|
for (op = 0; global_op_class[op].op_class; op++)
|
|
max_num++;
|
|
classes = os_zalloc((max_num + 1) * sizeof(int));
|
|
if (!classes)
|
|
return NULL;
|
|
|
|
for (op = 0, pos = 0; global_op_class[op].op_class; op++) {
|
|
if (wpas_op_class_supported(wpa_s, NULL, &global_op_class[op]))
|
|
classes[pos++] = global_op_class[op].op_class;
|
|
}
|
|
|
|
return classes;
|
|
}
|