@@ -19,6 +19,236 @@
#include "sta_info.h"
#include "wme.h"
+static inline void
+wbcs_ie_to_chandef(const struct ieee80211_wide_bw_chansw_ie *wbcs_ie,
+ struct cfg80211_chan_def *chandef)
+{
+ u8 ccfs0 = wbcs_ie->new_center_freq_seg0;
+ u8 ccfs1 = wbcs_ie->new_center_freq_seg1;
+ u32 cf0 = ieee80211_channel_to_frequency(ccfs0, chandef->chan->band);
+ u32 cf1 = ieee80211_channel_to_frequency(ccfs1, chandef->chan->band);
+
+ switch (wbcs_ie->new_channel_width) {
+ case IEEE80211_VHT_CHANWIDTH_160MHZ:
+ chandef->width = NL80211_CHAN_WIDTH_160;
+ chandef->center_freq1 = cf0;
+ break;
+ case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+ chandef->width = NL80211_CHAN_WIDTH_80P80;
+ chandef->center_freq1 = cf0;
+ chandef->center_freq2 = cf1;
+ break;
+ case IEEE80211_VHT_CHANWIDTH_80MHZ:
+ chandef->width = NL80211_CHAN_WIDTH_80;
+ chandef->center_freq1 = cf0;
+
+ if (ccfs1) {
+ u8 diff = abs(ccfs0 - ccfs1);
+
+ if (diff == 8) {
+ chandef->width = NL80211_CHAN_WIDTH_160;
+ chandef->center_freq1 = cf1;
+ } else if (diff > 8) {
+ chandef->width = NL80211_CHAN_WIDTH_80P80;
+ chandef->center_freq2 = cf1;
+ }
+ }
+ break;
+ case IEEE80211_VHT_CHANWIDTH_USE_HT:
+ default:
+ /* If the WBCS Element is present, new channel bandwidth is
+ * at least 40 MHz.
+ */
+ chandef->width = NL80211_CHAN_WIDTH_40;
+ chandef->center_freq1 = cf0;
+ break;
+ }
+}
+
+static inline int
+validate_chandef_by_ht_vht_oper(struct ieee80211_sub_if_data *sdata,
+ ieee80211_conn_flags_t conn_flags,
+ u32 vht_cap_info,
+ struct cfg80211_chan_def *chandef)
+{
+ u32 control_freq, center_freq1, center_freq2;
+ enum nl80211_chan_width chan_width;
+ struct ieee80211_ht_operation *ht_oper = NULL;
+ struct ieee80211_vht_operation *vht_oper = NULL;
+
+ if (conn_flags & (IEEE80211_CONN_DISABLE_HT |
+ IEEE80211_CONN_DISABLE_40MHZ)) {
+ chandef->chan = NULL;
+ return 0;
+ }
+
+ control_freq = chandef->chan->center_freq;
+ center_freq1 = chandef->center_freq1;
+ center_freq2 = chandef->center_freq2;
+ chan_width = chandef->width;
+
+ ht_oper = kzalloc(sizeof(*ht_oper), GFP_KERNEL);
+ if (!ht_oper)
+ return -ENOMEM;
+
+ ht_oper->primary_chan = ieee80211_frequency_to_channel(control_freq);
+ if (control_freq != center_freq1)
+ ht_oper->ht_param = control_freq > center_freq1 ?
+ IEEE80211_HT_PARAM_CHA_SEC_BELOW :
+ IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+ else
+ ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
+
+ ieee80211_chandef_ht_oper(ht_oper, chandef);
+
+ if (conn_flags & IEEE80211_CONN_DISABLE_VHT) {
+ kfree(ht_oper);
+ return 0;
+ }
+
+ vht_oper = kzalloc(sizeof(*vht_oper), GFP_KERNEL);
+ if (!vht_oper) {
+ kfree(ht_oper);
+ return -ENOMEM;
+ }
+
+ vht_oper->center_freq_seg0_idx =
+ ieee80211_frequency_to_channel(center_freq1);
+ vht_oper->center_freq_seg1_idx = center_freq2 ?
+ ieee80211_frequency_to_channel(center_freq2) : 0;
+
+ switch (chan_width) {
+ case NL80211_CHAN_WIDTH_320:
+ WARN_ON(1);
+ break;
+ case NL80211_CHAN_WIDTH_160:
+ vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+ vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
+ vht_oper->center_freq_seg0_idx +=
+ control_freq < center_freq1 ? -8 : 8;
+ break;
+ case NL80211_CHAN_WIDTH_80P80:
+ vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_80:
+ vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
+ break;
+ default:
+ vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
+ break;
+ }
+
+ ht_oper->operation_mode =
+ cpu_to_le16(vht_oper->center_freq_seg1_idx <<
+ IEEE80211_HT_OP_MODE_CCFS2_SHIFT);
+
+ if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
+ vht_oper, ht_oper, chandef))
+ chandef->chan = NULL;
+
+ kfree(ht_oper);
+ kfree(vht_oper);
+
+ return 0;
+}
+
+static inline int
+validate_chandef_by_6ghz_he_eht_oper(struct ieee80211_sub_if_data *sdata,
+ ieee80211_conn_flags_t conn_flags,
+ struct cfg80211_chan_def *chandef)
+{
+ u32 size, control_freq, center_freq1, center_freq2;
+ enum nl80211_chan_width chan_width;
+ struct ieee80211_he_operation *he_oper = NULL;
+ struct ieee80211_he_6ghz_oper *he_6ghz_oper;
+ struct ieee80211_eht_operation *eht_oper = NULL;
+ struct ieee80211_eht_operation_info *eht_oper_info;
+
+ if (conn_flags & (IEEE80211_CONN_DISABLE_HE)) {
+ chandef->chan = NULL;
+ return 0;
+ }
+
+ control_freq = chandef->chan->center_freq;
+ center_freq1 = chandef->center_freq1;
+ center_freq2 = chandef->center_freq2;
+ chan_width = chandef->width;
+
+ size = sizeof(struct ieee80211_he_operation) +
+ sizeof(struct ieee80211_he_6ghz_oper);
+
+ he_oper = kzalloc(size, GFP_KERNEL);
+ if (!he_oper)
+ return -ENOMEM;
+
+ if (!(conn_flags & IEEE80211_CONN_DISABLE_EHT)) {
+ size = sizeof(struct ieee80211_eht_operation) +
+ sizeof(struct ieee80211_eht_operation_info);
+
+ eht_oper = kzalloc(size, GFP_KERNEL);
+ if (!eht_oper) {
+ kfree(he_oper);
+ return -ENOMEM;
+ }
+ }
+
+ he_oper->he_oper_params = cpu_to_le32(u32_encode_bits(1,
+ IEEE80211_HE_OPERATION_6GHZ_OP_INFO));
+
+ he_6ghz_oper = (struct ieee80211_he_6ghz_oper *)he_oper->optional;
+ he_6ghz_oper->primary =
+ ieee80211_frequency_to_channel(control_freq);
+ he_6ghz_oper->ccfs0 = ieee80211_frequency_to_channel(center_freq1);
+ he_6ghz_oper->ccfs1 = center_freq2 ?
+ ieee80211_frequency_to_channel(center_freq2) : 0;
+
+ switch (chan_width) {
+ case NL80211_CHAN_WIDTH_320:
+ he_6ghz_oper->ccfs1 = he_6ghz_oper->ccfs0;
+ he_6ghz_oper->ccfs0 += control_freq < center_freq1 ? -16 : 16;
+ he_6ghz_oper->control = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_160:
+ he_6ghz_oper->ccfs1 = he_6ghz_oper->ccfs0;
+ he_6ghz_oper->ccfs0 += control_freq < center_freq1 ? -8 : 8;
+ fallthrough;
+ case NL80211_CHAN_WIDTH_80P80:
+ he_6ghz_oper->control =
+ IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_80:
+ he_6ghz_oper->control =
+ IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
+ break;
+ case NL80211_CHAN_WIDTH_40:
+ he_6ghz_oper->control =
+ IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
+ break;
+ default:
+ he_6ghz_oper->control =
+ IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
+ break;
+ }
+
+ if (eht_oper) {
+ eht_oper->params = IEEE80211_EHT_OPER_INFO_PRESENT;
+
+ eht_oper_info =
+ (struct ieee80211_eht_operation_info *)eht_oper->optional;
+ eht_oper_info->control = he_6ghz_oper->control;
+ eht_oper_info->ccfs0 = he_6ghz_oper->ccfs0;
+ eht_oper_info->ccfs1 = he_6ghz_oper->ccfs1;
+ }
+
+ if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper, chandef))
+ chandef->chan = NULL;
+
+ kfree(he_oper);
+ kfree(eht_oper);
+
+ return 0;
+}
+
int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems,
enum nl80211_band current_band,
@@ -27,13 +257,14 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
struct ieee80211_csa_ie *csa_ie)
{
enum nl80211_band new_band = current_band;
- int new_freq;
- u8 new_chan_no;
+ int new_freq, ret;
+ u8 new_chan_no = 0, new_op_class = 0;
struct ieee80211_channel *new_chan;
- struct cfg80211_chan_def new_vht_chandef = {};
+ struct cfg80211_chan_def new_chandef = {};
const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
const struct ieee80211_bandwidth_indication *bwi;
+ const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
int secondary_channel_offset = -1;
memset(csa_ie, 0, sizeof(*csa_ie));
@@ -41,6 +272,7 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
sec_chan_offs = elems->sec_chan_offs;
wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
bwi = elems->bandwidth_indication;
+ ext_chansw_ie = elems->ext_chansw_ie;
if (conn_flags & (IEEE80211_CONN_DISABLE_HT |
IEEE80211_CONN_DISABLE_40MHZ)) {
@@ -51,26 +283,30 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
if (conn_flags & IEEE80211_CONN_DISABLE_VHT)
wide_bw_chansw_ie = NULL;
- if (elems->ext_chansw_ie) {
- if (!ieee80211_operating_class_to_band(
- elems->ext_chansw_ie->new_operating_class,
- &new_band)) {
- sdata_info(sdata,
- "cannot understand ECSA IE operating class, %d, ignoring\n",
- elems->ext_chansw_ie->new_operating_class);
+ if (ext_chansw_ie) {
+ new_op_class = ext_chansw_ie->new_operating_class;
+ if (!ieee80211_operating_class_to_band(new_op_class, &new_band)) {
+ new_op_class = 0;
+ sdata_info(sdata, "cannot understand ECSA IE "
+ "operating class, %d, ignoring\n",
+ ext_chansw_ie->new_operating_class);
+ } else {
+ new_chan_no = ext_chansw_ie->new_ch_num;
+ csa_ie->count = ext_chansw_ie->count;
+ csa_ie->mode = ext_chansw_ie->mode;
}
- new_chan_no = elems->ext_chansw_ie->new_ch_num;
- csa_ie->count = elems->ext_chansw_ie->count;
- csa_ie->mode = elems->ext_chansw_ie->mode;
- } else if (elems->ch_switch_ie) {
+ }
+
+ if (!new_op_class && elems->ch_switch_ie) {
new_chan_no = elems->ch_switch_ie->new_ch_num;
csa_ie->count = elems->ch_switch_ie->count;
csa_ie->mode = elems->ch_switch_ie->mode;
- } else {
- /* nothing here we understand */
- return 1;
}
+ /* nothing here we understand */
+ if (!new_chan_no)
+ return 1;
+
/* Mesh Channel Switch Parameters Element */
if (elems->mesh_chansw_params_ie) {
csa_ie->ttl = elems->mesh_chansw_params_ie->mesh_ttl;
@@ -134,65 +370,68 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
break;
}
+ /* parse one of the Elements to build a new chandef */
+ memset(&new_chandef, 0, sizeof(new_chandef));
+ new_chandef.chan = new_chan;
if (bwi) {
/* start with the CSA one */
- new_vht_chandef = csa_ie->chandef;
+ new_chandef = csa_ie->chandef;
/* and update the width accordingly */
/* FIXME: support 160/320 */
ieee80211_chandef_eht_oper(&bwi->info, true, true,
- &new_vht_chandef);
- } else if (wide_bw_chansw_ie) {
- u8 new_seg1 = wide_bw_chansw_ie->new_center_freq_seg1;
- struct ieee80211_vht_operation vht_oper = {
- .chan_width =
- wide_bw_chansw_ie->new_channel_width,
- .center_freq_seg0_idx =
- wide_bw_chansw_ie->new_center_freq_seg0,
- .center_freq_seg1_idx = new_seg1,
- /* .basic_mcs_set doesn't matter */
- };
- struct ieee80211_ht_operation ht_oper = {
- .operation_mode =
- cpu_to_le16(new_seg1 <<
- IEEE80211_HT_OP_MODE_CCFS2_SHIFT),
- };
-
- /* default, for the case of IEEE80211_VHT_CHANWIDTH_USE_HT,
- * to the previously parsed chandef
- */
- new_vht_chandef = csa_ie->chandef;
+ &new_chandef);
+ } else if (!ieee80211_operating_class_to_chandef(new_op_class, new_chan,
+ &new_chandef)) {
+ if (wide_bw_chansw_ie)
+ wbcs_ie_to_chandef(wide_bw_chansw_ie, &new_chandef);
+ else
+ new_chandef = csa_ie->chandef;
+ }
+
+ if (!cfg80211_chandef_valid(&new_chandef))
+ new_chandef = csa_ie->chandef;
- /* ignore if parsing fails */
- if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
- vht_cap_info,
- &vht_oper, &ht_oper,
- &new_vht_chandef))
- new_vht_chandef.chan = NULL;
+ /* check if the new chandef fits the capabilities */
+ if (new_band == NL80211_BAND_6GHZ) {
+ ret = validate_chandef_by_6ghz_he_eht_oper(sdata, conn_flags,
+ &new_chandef);
+ if (ret)
+ return ret;
+ } else {
+ ret = validate_chandef_by_ht_vht_oper(sdata, conn_flags,
+ vht_cap_info, &new_chandef);
+ if (ret)
+ return ret;
+ }
+
+ /* if data is there validate the bandwidth & use it */
+ if (new_chandef.chan) {
+ if (conn_flags & IEEE80211_CONN_DISABLE_320MHZ &&
+ new_chandef.width == NL80211_CHAN_WIDTH_320)
+ ieee80211_chandef_downgrade(&new_chandef);
if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
- new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
- ieee80211_chandef_downgrade(&new_vht_chandef);
+ new_chandef.width == NL80211_CHAN_WIDTH_80P80)
+ ieee80211_chandef_downgrade(&new_chandef);
+
if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
- new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
- ieee80211_chandef_downgrade(&new_vht_chandef);
- }
+ new_chandef.width == NL80211_CHAN_WIDTH_160)
+ ieee80211_chandef_downgrade(&new_chandef);
- /* if VHT data is there validate & use it */
- if (new_vht_chandef.chan) {
- if (!cfg80211_chandef_compatible(&new_vht_chandef,
+ if (!cfg80211_chandef_compatible(&new_chandef,
&csa_ie->chandef)) {
sdata_info(sdata,
"BSS %pM: CSA has inconsistent channel data, disconnecting\n",
bssid);
return -EINVAL;
}
- csa_ie->chandef = new_vht_chandef;
+ csa_ie->chandef = new_chandef;
}
if (elems->max_channel_switch_time)
csa_ie->max_switch_time =
(elems->max_channel_switch_time[0] << 0) |
- (elems->max_channel_switch_time[1] << 8) |
+ (elems->max_channel_switch_time[1] << 8) |
(elems->max_channel_switch_time[2] << 16);
return 0;