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Diffstat (limited to 'net/mac80211/spectmgmt.c')
-rw-r--r--net/mac80211/spectmgmt.c337
1 files changed, 266 insertions, 71 deletions
diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c
index 55959b0b24c5..327c74e296e2 100644
--- a/net/mac80211/spectmgmt.c
+++ b/net/mac80211/spectmgmt.c
@@ -19,21 +19,222 @@
#include "sta_info.h"
#include "wme.h"
+static bool
+wbcs_elem_to_chandef(const struct ieee80211_wide_bw_chansw_ie *wbcs_elem,
+ struct cfg80211_chan_def *chandef)
+{
+ u8 ccfs0 = wbcs_elem->new_center_freq_seg0;
+ u8 ccfs1 = wbcs_elem->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_elem->new_channel_width) {
+ case IEEE80211_VHT_CHANWIDTH_160MHZ:
+ /* deprecated encoding */
+ chandef->width = NL80211_CHAN_WIDTH_160;
+ chandef->center_freq1 = cf0;
+ break;
+ case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+ /* deprecated encoding */
+ 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;
+ }
+
+ return cfg80211_chandef_valid(chandef);
+}
+
+static void
+validate_chandef_by_ht_vht_oper(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_conn_settings *conn,
+ 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;
+ struct ieee80211_vht_operation vht_oper;
+
+ if (conn->mode < IEEE80211_CONN_MODE_HT ||
+ conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
+ chandef->chan = NULL;
+ return;
+ }
+
+ control_freq = chandef->chan->center_freq;
+ center_freq1 = chandef->center_freq1;
+ center_freq2 = chandef->center_freq2;
+ chan_width = chandef->width;
+
+ 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->mode < IEEE80211_CONN_MODE_VHT)
+ return;
+
+ 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 =
+ le16_encode_bits(vht_oper.center_freq_seg1_idx,
+ IEEE80211_HT_OP_MODE_CCFS2_MASK);
+
+ if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
+ &vht_oper, &ht_oper, chandef))
+ chandef->chan = NULL;
+}
+
+static void
+validate_chandef_by_6ghz_he_eht_oper(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_conn_settings *conn,
+ struct cfg80211_chan_def *chandef)
+{
+ struct ieee80211_local *local = sdata->local;
+ u32 control_freq, center_freq1, center_freq2;
+ enum nl80211_chan_width chan_width;
+ struct {
+ struct ieee80211_he_operation _oper;
+ struct ieee80211_he_6ghz_oper _6ghz_oper;
+ } __packed he;
+ struct {
+ struct ieee80211_eht_operation _oper;
+ struct ieee80211_eht_operation_info _oper_info;
+ } __packed eht;
+
+ if (conn->mode < IEEE80211_CONN_MODE_HE) {
+ chandef->chan = NULL;
+ return;
+ }
+
+ control_freq = chandef->chan->center_freq;
+ center_freq1 = chandef->center_freq1;
+ center_freq2 = chandef->center_freq2;
+ chan_width = chandef->width;
+
+ he._oper.he_oper_params =
+ le32_encode_bits(1, IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
+ 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 (conn->mode < IEEE80211_CONN_MODE_EHT) {
+ if (!ieee80211_chandef_he_6ghz_oper(local, &he._oper,
+ NULL, chandef))
+ chandef->chan = NULL;
+ } else {
+ eht._oper.params = IEEE80211_EHT_OPER_INFO_PRESENT;
+ 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(local, &he._oper,
+ &eht._oper, chandef))
+ chandef->chan = NULL;
+ }
+}
+
int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems *elems,
enum nl80211_band current_band,
u32 vht_cap_info,
- ieee80211_conn_flags_t conn_flags, u8 *bssid,
+ struct ieee80211_conn_settings *conn,
+ u8 *bssid,
struct ieee80211_csa_ie *csa_ie)
{
enum nl80211_band new_band = current_band;
int new_freq;
- u8 new_chan_no;
+ 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_elem;
int secondary_channel_offset = -1;
memset(csa_ie, 0, sizeof(*csa_ie));
@@ -41,36 +242,41 @@ 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_elem = elems->ext_chansw_ie;
- if (conn_flags & (IEEE80211_CONN_DISABLE_HT |
- IEEE80211_CONN_DISABLE_40MHZ)) {
+ if (conn->mode < IEEE80211_CONN_MODE_HT ||
+ conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
sec_chan_offs = NULL;
wide_bw_chansw_ie = NULL;
}
- if (conn_flags & IEEE80211_CONN_DISABLE_VHT)
+ if (conn->mode < IEEE80211_CONN_MODE_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_elem) {
+ new_op_class = ext_chansw_elem->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_elem->new_operating_class);
+ } else {
+ new_chan_no = ext_chansw_elem->new_ch_num;
+ csa_ie->count = ext_chansw_elem->count;
+ csa_ie->mode = ext_chansw_elem->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;
@@ -95,7 +301,7 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
if (sec_chan_offs) {
secondary_channel_offset = sec_chan_offs->sec_chan_offs;
- } else if (!(conn_flags & IEEE80211_CONN_DISABLE_HT)) {
+ } else if (conn->mode >= IEEE80211_CONN_MODE_HT) {
/* If the secondary channel offset IE is not present,
* we can't know what's the post-CSA offset, so the
* best we can do is use 20MHz.
@@ -107,26 +313,26 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
default:
/* secondary_channel_offset was present but is invalid */
case IEEE80211_HT_PARAM_CHA_SEC_NONE:
- cfg80211_chandef_create(&csa_ie->chandef, new_chan,
+ cfg80211_chandef_create(&csa_ie->chanreq.oper, new_chan,
NL80211_CHAN_HT20);
break;
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
- cfg80211_chandef_create(&csa_ie->chandef, new_chan,
+ cfg80211_chandef_create(&csa_ie->chanreq.oper, new_chan,
NL80211_CHAN_HT40PLUS);
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
- cfg80211_chandef_create(&csa_ie->chandef, new_chan,
+ cfg80211_chandef_create(&csa_ie->chanreq.oper, new_chan,
NL80211_CHAN_HT40MINUS);
break;
case -1:
- cfg80211_chandef_create(&csa_ie->chandef, new_chan,
+ cfg80211_chandef_create(&csa_ie->chanreq.oper, new_chan,
NL80211_CHAN_NO_HT);
/* keep width for 5/10 MHz channels */
- switch (sdata->vif.bss_conf.chandef.width) {
+ switch (sdata->vif.bss_conf.chanreq.oper.width) {
case NL80211_CHAN_WIDTH_5:
case NL80211_CHAN_WIDTH_10:
- csa_ie->chandef.width =
- sdata->vif.bss_conf.chandef.width;
+ csa_ie->chanreq.oper.width =
+ sdata->vif.bss_conf.chanreq.oper.width;
break;
default:
break;
@@ -134,59 +340,48 @@ 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->chanreq.oper;
/* 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;
-
- /* 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;
-
- if (conn_flags & IEEE80211_CONN_DISABLE_80P80MHZ &&
- new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
- ieee80211_chandef_downgrade(&new_vht_chandef);
- if (conn_flags & IEEE80211_CONN_DISABLE_160MHZ &&
- new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
- ieee80211_chandef_downgrade(&new_vht_chandef);
+ ieee80211_chandef_eht_oper(&bwi->info, &new_chandef);
+ } else if (!wide_bw_chansw_ie || !wbcs_elem_to_chandef(wide_bw_chansw_ie,
+ &new_chandef)) {
+ if (!ieee80211_operating_class_to_chandef(new_op_class, new_chan,
+ &new_chandef))
+ new_chandef = csa_ie->chanreq.oper;
}
- /* if VHT data is there validate & use it */
- if (new_vht_chandef.chan) {
- if (!cfg80211_chandef_compatible(&new_vht_chandef,
- &csa_ie->chandef)) {
+ /* check if the new chandef fits the capabilities */
+ if (new_band == NL80211_BAND_6GHZ)
+ validate_chandef_by_6ghz_he_eht_oper(sdata, conn, &new_chandef);
+ else
+ validate_chandef_by_ht_vht_oper(sdata, conn, vht_cap_info,
+ &new_chandef);
+
+ /* if data is there validate the bandwidth & use it */
+ if (new_chandef.chan) {
+ if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320 &&
+ new_chandef.width == NL80211_CHAN_WIDTH_320)
+ ieee80211_chandef_downgrade(&new_chandef, NULL);
+
+ if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160 &&
+ (new_chandef.width == NL80211_CHAN_WIDTH_80P80 ||
+ new_chandef.width == NL80211_CHAN_WIDTH_160))
+ ieee80211_chandef_downgrade(&new_chandef, NULL);
+
+ if (!cfg80211_chandef_compatible(&new_chandef,
+ &csa_ie->chanreq.oper)) {
sdata_info(sdata,
"BSS %pM: CSA has inconsistent channel data, disconnecting\n",
bssid);
return -EINVAL;
}
- csa_ie->chandef = new_vht_chandef;
+
+ csa_ie->chanreq.oper = new_chandef;
}
if (elems->max_channel_switch_time)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.