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Diffstat (limited to 'contrib/wpa/src/ap/dfs.c')
-rw-r--r--contrib/wpa/src/ap/dfs.c330
1 files changed, 280 insertions, 50 deletions
diff --git a/contrib/wpa/src/ap/dfs.c b/contrib/wpa/src/ap/dfs.c
index ac23c2b1bc9f..03c99b175215 100644
--- a/contrib/wpa/src/ap/dfs.c
+++ b/contrib/wpa/src/ap/dfs.c
@@ -81,17 +81,17 @@ static int dfs_is_chan_allowed(struct hostapd_channel_data *chan, int n_chans)
* We will also choose this first channel as the control one.
*/
int allowed_40[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157,
- 184, 192 };
+ 165, 173, 184, 192 };
/*
* VHT80, valid channels based on center frequency:
- * 42, 58, 106, 122, 138, 155
+ * 42, 58, 106, 122, 138, 155, 171
*/
- int allowed_80[] = { 36, 52, 100, 116, 132, 149 };
+ int allowed_80[] = { 36, 52, 100, 116, 132, 149, 165 };
/*
* VHT160 valid channels based on center frequency:
- * 50, 114
+ * 50, 114, 163
*/
- int allowed_160[] = { 36, 100 };
+ int allowed_160[] = { 36, 100, 149 };
int *allowed = allowed_40;
unsigned int i, allowed_no = 0;
@@ -144,30 +144,44 @@ static int dfs_chan_range_available(struct hostapd_hw_modes *mode,
int i;
u32 bw = num_chan_to_bw(num_chans);
- if (first_chan_idx + num_chans > mode->num_channels)
+ if (first_chan_idx + num_chans > mode->num_channels) {
+ wpa_printf(MSG_DEBUG,
+ "DFS: some channels in range not defined");
return 0;
+ }
first_chan = &mode->channels[first_chan_idx];
/* hostapd DFS implementation assumes the first channel as primary.
* If it's not allowed to use the first channel as primary, decline the
* whole channel range. */
- if (!chan_pri_allowed(first_chan))
+ if (!chan_pri_allowed(first_chan)) {
+ wpa_printf(MSG_DEBUG, "DFS: primary chanenl not allowed");
return 0;
+ }
for (i = 0; i < num_chans; i++) {
chan = dfs_get_chan_data(mode, first_chan->freq + i * 20,
first_chan_idx);
- if (!chan)
+ if (!chan) {
+ wpa_printf(MSG_DEBUG, "DFS: no channel data for %d",
+ first_chan->freq + i * 20);
return 0;
+ }
/* HT 40 MHz secondary channel availability checked only for
* primary channel */
- if (!chan_bw_allowed(chan, bw, 1, !i))
+ if (!chan_bw_allowed(chan, bw, 1, !i)) {
+ wpa_printf(MSG_DEBUG, "DFS: bw now allowed for %d",
+ first_chan->freq + i * 20);
return 0;
+ }
- if (!dfs_channel_available(chan, skip_radar))
+ if (!dfs_channel_available(chan, skip_radar)) {
+ wpa_printf(MSG_DEBUG, "DFS: channel not available %d",
+ first_chan->freq + i * 20);
return 0;
+ }
}
return 1;
@@ -210,22 +224,36 @@ static int dfs_find_channel(struct hostapd_iface *iface,
if (iface->conf->ieee80211n &&
iface->conf->secondary_channel &&
(!dfs_is_chan_allowed(chan, n_chans) ||
- !(chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)))
+ !(chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P))) {
+ wpa_printf(MSG_DEBUG,
+ "DFS: channel %d (%d) is incompatible",
+ chan->freq, chan->chan);
continue;
+ }
/* Skip incompatible chandefs */
- if (!dfs_chan_range_available(mode, i, n_chans, skip_radar))
+ if (!dfs_chan_range_available(mode, i, n_chans, skip_radar)) {
+ wpa_printf(MSG_DEBUG,
+ "DFS: range not available for %d (%d)",
+ chan->freq, chan->chan);
continue;
+ }
- if (!is_in_chanlist(iface, chan))
+ if (!is_in_chanlist(iface, chan)) {
+ wpa_printf(MSG_DEBUG,
+ "DFS: channel %d (%d) not in chanlist",
+ chan->freq, chan->chan);
continue;
+ }
if (ret_chan && idx == channel_idx) {
- wpa_printf(MSG_DEBUG, "Selected ch. #%d", chan->chan);
+ wpa_printf(MSG_DEBUG, "Selected channel %d (%d)",
+ chan->freq, chan->chan);
*ret_chan = chan;
return idx;
}
- wpa_printf(MSG_DEBUG, "Adding channel: %d", chan->chan);
+ wpa_printf(MSG_DEBUG, "Adding channel %d (%d)",
+ chan->freq, chan->chan);
channel_idx++;
}
return channel_idx;
@@ -235,6 +263,7 @@ static int dfs_find_channel(struct hostapd_iface *iface,
static void dfs_adjust_center_freq(struct hostapd_iface *iface,
struct hostapd_channel_data *chan,
int secondary_channel,
+ int sec_chan_idx_80p80,
u8 *oper_centr_freq_seg0_idx,
u8 *oper_centr_freq_seg1_idx)
{
@@ -261,8 +290,14 @@ static void dfs_adjust_center_freq(struct hostapd_iface *iface,
case CHANWIDTH_160MHZ:
*oper_centr_freq_seg0_idx = chan->chan + 14;
break;
+ case CHANWIDTH_80P80MHZ:
+ *oper_centr_freq_seg0_idx = chan->chan + 6;
+ *oper_centr_freq_seg1_idx = sec_chan_idx_80p80 + 6;
+ break;
+
default:
- wpa_printf(MSG_INFO, "DFS only VHT20/40/80/160 is supported now");
+ wpa_printf(MSG_INFO,
+ "DFS: Unsupported channel width configuration");
*oper_centr_freq_seg0_idx = 0;
break;
}
@@ -441,8 +476,11 @@ dfs_get_valid_channel(struct hostapd_iface *iface,
{
struct hostapd_hw_modes *mode;
struct hostapd_channel_data *chan = NULL;
+ struct hostapd_channel_data *chan2 = NULL;
int num_available_chandefs;
- int chan_idx;
+ int chan_idx, chan_idx2;
+ int sec_chan_idx_80p80 = -1;
+ int i;
u32 _rand;
wpa_printf(MSG_DEBUG, "DFS: Selecting random channel");
@@ -459,6 +497,8 @@ dfs_get_valid_channel(struct hostapd_iface *iface,
/* Get the count first */
num_available_chandefs = dfs_find_channel(iface, NULL, 0, skip_radar);
+ wpa_printf(MSG_DEBUG, "DFS: num_available_chandefs=%d",
+ num_available_chandefs);
if (num_available_chandefs == 0)
return NULL;
@@ -466,6 +506,12 @@ dfs_get_valid_channel(struct hostapd_iface *iface,
return NULL;
chan_idx = _rand % num_available_chandefs;
dfs_find_channel(iface, &chan, chan_idx, skip_radar);
+ if (!chan) {
+ wpa_printf(MSG_DEBUG, "DFS: no random channel found");
+ return NULL;
+ }
+ wpa_printf(MSG_DEBUG, "DFS: got random channel %d (%d)",
+ chan->freq, chan->chan);
/* dfs_find_channel() calculations assume HT40+ */
if (iface->conf->secondary_channel)
@@ -473,8 +519,45 @@ dfs_get_valid_channel(struct hostapd_iface *iface,
else
*secondary_channel = 0;
+ /* Get secondary channel for HT80P80 */
+ if (hostapd_get_oper_chwidth(iface->conf) == CHANWIDTH_80P80MHZ) {
+ if (num_available_chandefs <= 1) {
+ wpa_printf(MSG_ERROR,
+ "only 1 valid chan, can't support 80+80");
+ return NULL;
+ }
+
+ /*
+ * Loop all channels except channel1 to find a valid channel2
+ * that is not adjacent to channel1.
+ */
+ for (i = 0; i < num_available_chandefs - 1; i++) {
+ /* start from chan_idx + 1, end when chan_idx - 1 */
+ chan_idx2 = (chan_idx + 1 + i) % num_available_chandefs;
+ dfs_find_channel(iface, &chan2, chan_idx2, skip_radar);
+ if (chan2 && abs(chan2->chan - chan->chan) > 12) {
+ /* two channels are not adjacent */
+ sec_chan_idx_80p80 = chan2->chan;
+ wpa_printf(MSG_DEBUG,
+ "DFS: got second chan: %d (%d)",
+ chan2->freq, chan2->chan);
+ break;
+ }
+ }
+
+ /* Check if we got a valid secondary channel which is not
+ * adjacent to the first channel.
+ */
+ if (sec_chan_idx_80p80 == -1) {
+ wpa_printf(MSG_INFO,
+ "DFS: failed to get chan2 for 80+80");
+ return NULL;
+ }
+ }
+
dfs_adjust_center_freq(iface, chan,
*secondary_channel,
+ sec_chan_idx_80p80,
oper_centr_freq_seg0_idx,
oper_centr_freq_seg1_idx);
@@ -515,6 +598,7 @@ static int set_dfs_state(struct hostapd_iface *iface, int freq, int ht_enabled,
int n_chans = 1, i;
struct hostapd_hw_modes *mode;
int frequency = freq;
+ int frequency2 = 0;
int ret = 0;
mode = iface->current_mode;
@@ -542,6 +626,11 @@ static int set_dfs_state(struct hostapd_iface *iface, int freq, int ht_enabled,
n_chans = 4;
frequency = cf1 - 30;
break;
+ case CHAN_WIDTH_80P80:
+ n_chans = 4;
+ frequency = cf1 - 30;
+ frequency2 = cf2 - 30;
+ break;
case CHAN_WIDTH_160:
n_chans = 8;
frequency = cf1 - 70;
@@ -557,6 +646,11 @@ static int set_dfs_state(struct hostapd_iface *iface, int freq, int ht_enabled,
for (i = 0; i < n_chans; i++) {
ret += set_dfs_state_freq(iface, frequency, state);
frequency = frequency + 20;
+
+ if (chan_width == CHAN_WIDTH_80P80) {
+ ret += set_dfs_state_freq(iface, frequency2, state);
+ frequency2 = frequency2 + 20;
+ }
}
return ret;
@@ -662,6 +756,9 @@ int hostapd_handle_dfs(struct hostapd_iface *iface)
int res, n_chans, n_chans1, start_chan_idx, start_chan_idx1;
int skip_radar = 0;
+ if (is_6ghz_freq(iface->freq))
+ return 1;
+
if (!iface->current_mode) {
/*
* This can happen with drivers that do not provide mode
@@ -759,7 +856,7 @@ int hostapd_handle_dfs(struct hostapd_iface *iface)
}
-static int hostapd_config_dfs_chan_available(struct hostapd_iface *iface)
+int hostapd_is_dfs_chan_available(struct hostapd_iface *iface)
{
int n_chans, n_chans1, start_chan_idx, start_chan_idx1;
@@ -807,7 +904,7 @@ int hostapd_dfs_complete_cac(struct hostapd_iface *iface, int success, int freq,
* another radio.
*/
if (iface->state != HAPD_IFACE_ENABLED &&
- hostapd_config_dfs_chan_available(iface)) {
+ hostapd_is_dfs_chan_available(iface)) {
hostapd_setup_interface_complete(iface, 0);
iface->cac_started = 0;
}
@@ -837,6 +934,44 @@ int hostapd_dfs_pre_cac_expired(struct hostapd_iface *iface, int freq,
}
+static struct hostapd_channel_data *
+dfs_downgrade_bandwidth(struct hostapd_iface *iface, int *secondary_channel,
+ u8 *oper_centr_freq_seg0_idx,
+ u8 *oper_centr_freq_seg1_idx, int *skip_radar)
+{
+ struct hostapd_channel_data *channel;
+
+ for (;;) {
+ channel = dfs_get_valid_channel(iface, secondary_channel,
+ oper_centr_freq_seg0_idx,
+ oper_centr_freq_seg1_idx,
+ *skip_radar);
+ if (channel) {
+ wpa_printf(MSG_DEBUG, "DFS: Selected channel: %d",
+ channel->chan);
+ return channel;
+ }
+
+ if (*skip_radar) {
+ *skip_radar = 0;
+ } else {
+ int oper_chwidth;
+
+ oper_chwidth = hostapd_get_oper_chwidth(iface->conf);
+ if (oper_chwidth == CHANWIDTH_USE_HT)
+ break;
+ *skip_radar = 1;
+ hostapd_set_oper_chwidth(iface->conf, oper_chwidth - 1);
+ }
+ }
+
+ wpa_printf(MSG_INFO,
+ "%s: no DFS channels left, waiting for NOP to finish",
+ __func__);
+ return NULL;
+}
+
+
static int hostapd_dfs_start_channel_switch_cac(struct hostapd_iface *iface)
{
struct hostapd_channel_data *channel;
@@ -854,8 +989,14 @@ static int hostapd_dfs_start_channel_switch_cac(struct hostapd_iface *iface)
skip_radar);
if (!channel) {
- wpa_printf(MSG_ERROR, "No valid channel available");
- return err;
+ channel = dfs_downgrade_bandwidth(iface, &secondary_channel,
+ &oper_centr_freq_seg0_idx,
+ &oper_centr_freq_seg1_idx,
+ &skip_radar);
+ if (!channel) {
+ wpa_printf(MSG_ERROR, "No valid channel available");
+ return err;
+ }
}
wpa_printf(MSG_DEBUG, "DFS will switch to a new channel %d",
@@ -884,11 +1025,14 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
int secondary_channel;
u8 oper_centr_freq_seg0_idx;
u8 oper_centr_freq_seg1_idx;
+ u8 new_vht_oper_chwidth;
int skip_radar = 1;
struct csa_settings csa_settings;
unsigned int i;
int err = 1;
struct hostapd_hw_modes *cmode = iface->current_mode;
+ u8 current_vht_oper_chwidth = hostapd_get_oper_chwidth(iface->conf);
+ int ieee80211_mode = IEEE80211_MODE_AP;
wpa_printf(MSG_DEBUG, "%s called (CAC active: %s, CSA active: %s)",
__func__, iface->cac_started ? "yes" : "no",
@@ -922,28 +1066,33 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
* requires to perform a CAC first.
*/
skip_radar = 0;
- channel = dfs_get_valid_channel(iface, &secondary_channel,
- &oper_centr_freq_seg0_idx,
- &oper_centr_freq_seg1_idx,
- skip_radar);
+ channel = dfs_downgrade_bandwidth(iface, &secondary_channel,
+ &oper_centr_freq_seg0_idx,
+ &oper_centr_freq_seg1_idx,
+ &skip_radar);
if (!channel) {
- wpa_printf(MSG_INFO,
- "%s: no DFS channels left, waiting for NOP to finish",
- __func__);
- return err;
+ /*
+ * Toggle interface state to enter DFS state
+ * until NOP is finished.
+ */
+ hostapd_disable_iface(iface);
+ hostapd_enable_iface(iface);
+ return 0;
}
- iface->freq = channel->freq;
- iface->conf->channel = channel->chan;
- iface->conf->secondary_channel = secondary_channel;
- hostapd_set_oper_centr_freq_seg0_idx(iface->conf,
- oper_centr_freq_seg0_idx);
- hostapd_set_oper_centr_freq_seg1_idx(iface->conf,
- oper_centr_freq_seg1_idx);
-
- hostapd_disable_iface(iface);
- hostapd_enable_iface(iface);
- return 0;
+ if (!skip_radar) {
+ iface->freq = channel->freq;
+ iface->conf->channel = channel->chan;
+ iface->conf->secondary_channel = secondary_channel;
+ hostapd_set_oper_centr_freq_seg0_idx(
+ iface->conf, oper_centr_freq_seg0_idx);
+ hostapd_set_oper_centr_freq_seg1_idx(
+ iface->conf, oper_centr_freq_seg1_idx);
+
+ hostapd_disable_iface(iface);
+ hostapd_enable_iface(iface);
+ return 0;
+ }
}
wpa_printf(MSG_DEBUG, "DFS will switch to a new channel %d",
@@ -952,23 +1101,32 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
"freq=%d chan=%d sec_chan=%d", channel->freq,
channel->chan, secondary_channel);
+ new_vht_oper_chwidth = hostapd_get_oper_chwidth(iface->conf);
+ hostapd_set_oper_chwidth(iface->conf, current_vht_oper_chwidth);
+
/* Setup CSA request */
os_memset(&csa_settings, 0, sizeof(csa_settings));
csa_settings.cs_count = 5;
csa_settings.block_tx = 1;
+#ifdef CONFIG_MESH
+ if (iface->mconf)
+ ieee80211_mode = IEEE80211_MODE_MESH;
+#endif /* CONFIG_MESH */
err = hostapd_set_freq_params(&csa_settings.freq_params,
iface->conf->hw_mode,
channel->freq,
channel->chan,
+ iface->conf->enable_edmg,
+ iface->conf->edmg_channel,
iface->conf->ieee80211n,
iface->conf->ieee80211ac,
iface->conf->ieee80211ax,
secondary_channel,
- hostapd_get_oper_chwidth(iface->conf),
+ new_vht_oper_chwidth,
oper_centr_freq_seg0_idx,
oper_centr_freq_seg1_idx,
cmode->vht_capab,
- &cmode->he_capab[IEEE80211_MODE_AP]);
+ &cmode->he_capab[ieee80211_mode]);
if (err) {
wpa_printf(MSG_ERROR, "DFS failed to calculate CSA freq params");
@@ -988,6 +1146,7 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface)
iface->freq = channel->freq;
iface->conf->channel = channel->chan;
iface->conf->secondary_channel = secondary_channel;
+ hostapd_set_oper_chwidth(iface->conf, new_vht_oper_chwidth);
hostapd_set_oper_centr_freq_seg0_idx(iface->conf,
oper_centr_freq_seg0_idx);
hostapd_set_oper_centr_freq_seg1_idx(iface->conf,
@@ -1024,8 +1183,10 @@ int hostapd_dfs_radar_detected(struct hostapd_iface *iface, int freq,
return 0;
/* mark radar frequency as invalid */
- set_dfs_state(iface, freq, ht_enabled, chan_offset, chan_width,
- cf1, cf2, HOSTAPD_CHAN_DFS_UNAVAILABLE);
+ res = set_dfs_state(iface, freq, ht_enabled, chan_offset, chan_width,
+ cf1, cf2, HOSTAPD_CHAN_DFS_UNAVAILABLE);
+ if (!res)
+ return 0;
/* Skip if reported radar event not overlapped our channels */
res = dfs_are_channels_overlapped(iface, freq, chan_width, cf1, cf2);
@@ -1067,7 +1228,9 @@ int hostapd_is_dfs_required(struct hostapd_iface *iface)
{
int n_chans, n_chans1, start_chan_idx, start_chan_idx1, res;
- if (!iface->conf->ieee80211h || !iface->current_mode ||
+ if ((!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
+ !iface->conf->ieee80211h) ||
+ !iface->current_mode ||
iface->current_mode->mode != HOSTAPD_MODE_IEEE80211A)
return 0;
@@ -1093,11 +1256,18 @@ int hostapd_dfs_start_cac(struct hostapd_iface *iface, int freq,
int ht_enabled, int chan_offset, int chan_width,
int cf1, int cf2)
{
+ /* This is called when the driver indicates that an offloaded DFS has
+ * started CAC. */
+ hostapd_set_state(iface, HAPD_IFACE_DFS);
+ /* TODO: How to check CAC time for ETSI weather channels? */
+ iface->dfs_cac_ms = 60000;
wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, DFS_EVENT_CAC_START
"freq=%d chan=%d chan_offset=%d width=%d seg0=%d "
"seg1=%d cac_time=%ds",
- freq, (freq - 5000) / 5, chan_offset, chan_width, cf1, cf2, 60);
+ freq, (freq - 5000) / 5, chan_offset, chan_width, cf1, cf2,
+ iface->dfs_cac_ms / 1000);
iface->cac_started = 1;
+ os_get_reltime(&iface->dfs_cac_start);
return 0;
}
@@ -1111,6 +1281,8 @@ int hostapd_dfs_start_cac(struct hostapd_iface *iface, int freq,
*/
int hostapd_handle_dfs_offload(struct hostapd_iface *iface)
{
+ int dfs_res;
+
wpa_printf(MSG_DEBUG, "%s: iface->cac_started: %d",
__func__, iface->cac_started);
@@ -1126,10 +1298,11 @@ int hostapd_handle_dfs_offload(struct hostapd_iface *iface)
return 1;
}
- if (ieee80211_is_dfs(iface->freq, iface->hw_features,
- iface->num_hw_features)) {
- wpa_printf(MSG_DEBUG, "%s: freq %d MHz requires DFS",
- __func__, iface->freq);
+ dfs_res = hostapd_is_dfs_required(iface);
+ if (dfs_res > 0) {
+ wpa_printf(MSG_DEBUG,
+ "%s: freq %d MHz requires DFS for %d chans",
+ __func__, iface->freq, dfs_res);
return 0;
}
@@ -1138,3 +1311,60 @@ int hostapd_handle_dfs_offload(struct hostapd_iface *iface)
__func__, iface->freq);
return 2;
}
+
+
+int hostapd_is_dfs_overlap(struct hostapd_iface *iface, enum chan_width width,
+ int center_freq)
+{
+ struct hostapd_channel_data *chan;
+ struct hostapd_hw_modes *mode = iface->current_mode;
+ int half_width;
+ int res = 0;
+ int i;
+
+ if (!iface->conf->ieee80211h || !mode ||
+ mode->mode != HOSTAPD_MODE_IEEE80211A)
+ return 0;
+
+ switch (width) {
+ case CHAN_WIDTH_20_NOHT:
+ case CHAN_WIDTH_20:
+ half_width = 10;
+ break;
+ case CHAN_WIDTH_40:
+ half_width = 20;
+ break;
+ case CHAN_WIDTH_80:
+ case CHAN_WIDTH_80P80:
+ half_width = 40;
+ break;
+ case CHAN_WIDTH_160:
+ half_width = 80;
+ break;
+ default:
+ wpa_printf(MSG_WARNING, "DFS chanwidth %d not supported",
+ width);
+ return 0;
+ }
+
+ for (i = 0; i < mode->num_channels; i++) {
+ chan = &mode->channels[i];
+
+ if (!(chan->flag & HOSTAPD_CHAN_RADAR))
+ continue;
+
+ if ((chan->flag & HOSTAPD_CHAN_DFS_MASK) ==
+ HOSTAPD_CHAN_DFS_AVAILABLE)
+ continue;
+
+ if (center_freq - chan->freq < half_width &&
+ chan->freq - center_freq < half_width)
+ res++;
+ }
+
+ wpa_printf(MSG_DEBUG, "DFS CAC required: (%d, %d): in range: %s",
+ center_freq - half_width, center_freq + half_width,
+ res ? "yes" : "no");
+
+ return res;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-10 19:23:16 +0000