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nl80211/hostapd: Extend channel switch notify handling

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Adds support for VHT by parsing bandwidth and center_freq{1,2}.

Signed-hostap: Michal Kazior <michal.kazior@tieto.com>
Signed-hostap: Janusz Dziedzic <janusz.dziedzic@tieto.com>
This commit is contained in:
Janusz Dziedzic 2013-11-25 20:16:12 +01:00 committed by Jouni Malinen
parent 10e694a618
commit 8d1fdde7f0
7 changed files with 127 additions and 51 deletions
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46
src/ap/drv_callbacks.c
View file

@ -381,14 +381,15 @@ void hostapd_event_sta_low_ack(struct hostapd_data *hapd, const u8 *addr)
void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht,
int offset)
int offset, int width, int cf1, int cf2)
{
#ifdef NEED_AP_MLME
int channel;
int channel, chwidth, seg0_idx = 0, seg1_idx = 0;
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_INFO, "driver had channel switch: "
"freq=%d, ht=%d, offset=%d", freq, ht, offset);
"freq=%d, ht=%d, offset=%d, width=%d, cf1=%d, cf2=%d",
freq, ht, offset, width, cf1, cf2);
hapd->iface->freq = freq;
@ -400,9 +401,43 @@ void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht,
return;
}
switch (width) {
case CHAN_WIDTH_80:
chwidth = VHT_CHANWIDTH_80MHZ;
break;
case CHAN_WIDTH_80P80:
chwidth = VHT_CHANWIDTH_80P80MHZ;
break;
case CHAN_WIDTH_160:
chwidth = VHT_CHANWIDTH_160MHZ;
break;
case CHAN_WIDTH_20_NOHT:
case CHAN_WIDTH_20:
case CHAN_WIDTH_40:
default:
chwidth = VHT_CHANWIDTH_USE_HT;
break;
}
switch (hapd->iface->current_mode->mode) {
case HOSTAPD_MODE_IEEE80211A:
if (cf1 > 5000)
seg0_idx = (cf1 - 5000) / 5;
if (cf2 > 5000)
seg1_idx = (cf2 - 5000) / 5;
break;
default:
seg0_idx = hostapd_hw_get_channel(hapd, cf1);
seg1_idx = hostapd_hw_get_channel(hapd, cf2);
break;
}
hapd->iconf->channel = channel;
hapd->iconf->ieee80211n = ht;
hapd->iconf->secondary_channel = offset;
hapd->iconf->vht_oper_chwidth = chwidth;
hapd->iconf->vht_oper_centr_freq_seg0_idx = seg0_idx;
hapd->iconf->vht_oper_centr_freq_seg1_idx = seg1_idx;
if (hapd->iface->csa_in_progress && freq == hapd->iface->cs_freq) {
hostapd_cleanup_cs_params(hapd);
@ -976,7 +1011,10 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
break;
hostapd_event_ch_switch(hapd, data->ch_switch.freq,
data->ch_switch.ht_enabled,
data->ch_switch.ch_offset);
data->ch_switch.ch_offset,
data->ch_switch.ch_width,
data->ch_switch.cf1,
data->ch_switch.cf2);
break;
case EVENT_CONNECT_FAILED_REASON:
if (!data)

2
src/ap/hostapd.h
View file

@ -414,7 +414,7 @@ int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa, const u8 *da,
const u8 *bssid, const u8 *ie, size_t ie_len,
int ssi_signal);
void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht,
int offset);
int offset, int width, int cf1, int cf2);
const struct hostapd_eap_user *
hostapd_get_eap_user(struct hostapd_data *hapd, const u8 *identity,

6
src/drivers/driver.h
View file

@ -4028,11 +4028,17 @@ union wpa_event_data {
* @freq: Frequency of new channel in MHz
* @ht_enabled: Whether this is an HT channel
* @ch_offset: Secondary channel offset
* @ch_width: Channel width
* @cf1: Center frequency 1
* @cf2: Center frequency 2
*/
struct ch_switch {
int freq;
int ht_enabled;
int ch_offset;
enum chan_width ch_width;
int cf1;
int cf2;
} ch_switch;
/**

113
src/drivers/driver_nl80211.c
View file

@ -504,6 +504,27 @@ static const char * nl80211_command_to_string(enum nl80211_commands cmd)
}
/* Converts nl80211_chan_width to a common format */
static enum chan_width convert2width(int width)
{
switch (width) {
case NL80211_CHAN_WIDTH_20_NOHT:
return CHAN_WIDTH_20_NOHT;
case NL80211_CHAN_WIDTH_20:
return CHAN_WIDTH_20;
case NL80211_CHAN_WIDTH_40:
return CHAN_WIDTH_40;
case NL80211_CHAN_WIDTH_80:
return CHAN_WIDTH_80;
case NL80211_CHAN_WIDTH_80P80:
return CHAN_WIDTH_80P80;
case NL80211_CHAN_WIDTH_160:
return CHAN_WIDTH_160;
}
return CHAN_WIDTH_UNKNOWN;
}
static int is_ap_interface(enum nl80211_iftype nlmode)
{
return (nlmode == NL80211_IFTYPE_AP ||
@ -1484,36 +1505,60 @@ static void mlme_event_disconnect(struct wpa_driver_nl80211_data *drv,
static void mlme_event_ch_switch(struct wpa_driver_nl80211_data *drv,
struct nlattr *freq, struct nlattr *type)
struct nlattr *ifindex, struct nlattr *freq,
struct nlattr *type, struct nlattr *bw,
struct nlattr *cf1, struct nlattr *cf2)
{
struct i802_bss *bss;
union wpa_event_data data;
int ht_enabled = 1;
int chan_offset = 0;
int ifidx;
wpa_printf(MSG_DEBUG, "nl80211: Channel switch event");
if (!freq || !type)
if (!freq)
return;
switch (nla_get_u32(type)) {
case NL80211_CHAN_NO_HT:
ht_enabled = 0;
break;
case NL80211_CHAN_HT20:
break;
case NL80211_CHAN_HT40PLUS:
chan_offset = 1;
break;
case NL80211_CHAN_HT40MINUS:
chan_offset = -1;
break;
ifidx = nla_get_u32(ifindex);
for (bss = drv->first_bss; bss; bss = bss->next)
if (bss->ifindex == ifidx)
break;
if (bss == NULL) {
wpa_printf(MSG_WARNING, "nl80211: Unknown ifindex (%d) for channel switch, ignoring",
ifidx);
return;
}
if (type) {
switch (nla_get_u32(type)) {
case NL80211_CHAN_NO_HT:
ht_enabled = 0;
break;
case NL80211_CHAN_HT20:
break;
case NL80211_CHAN_HT40PLUS:
chan_offset = 1;
break;
case NL80211_CHAN_HT40MINUS:
chan_offset = -1;
break;
}
}
os_memset(&data, 0, sizeof(data));
data.ch_switch.freq = nla_get_u32(freq);
data.ch_switch.ht_enabled = ht_enabled;
data.ch_switch.ch_offset = chan_offset;
if (bw)
data.ch_switch.ch_width = convert2width(nla_get_u32(bw));
if (cf1)
data.ch_switch.cf1 = nla_get_u32(cf1);
if (cf2)
data.ch_switch.cf2 = nla_get_u32(cf2);
drv->first_bss->freq = data.ch_switch.freq;
bss->freq = data.ch_switch.freq;
wpa_supplicant_event(drv->ctx, EVENT_CH_SWITCH, &data);
}
@ -2534,8 +2579,6 @@ static void nl80211_connect_failed_event(struct wpa_driver_nl80211_data *drv,
}
static enum chan_width convert2width(int width);
static void nl80211_radar_event(struct wpa_driver_nl80211_data *drv,
struct nlattr **tb)
{
@ -2702,8 +2745,13 @@ static void do_process_drv_event(struct i802_bss *bss, int cmd,
tb[NL80211_ATTR_RESP_IE]);
break;
case NL80211_CMD_CH_SWITCH_NOTIFY:
mlme_event_ch_switch(drv, tb[NL80211_ATTR_WIPHY_FREQ],
tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
mlme_event_ch_switch(drv,
tb[NL80211_ATTR_IFINDEX],
tb[NL80211_ATTR_WIPHY_FREQ],
tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE],
tb[NL80211_ATTR_CHANNEL_WIDTH],
tb[NL80211_ATTR_CENTER_FREQ1],
tb[NL80211_ATTR_CENTER_FREQ2]);
break;
case NL80211_CMD_DISCONNECT:
mlme_event_disconnect(drv, tb[NL80211_ATTR_REASON_CODE],
@ -10020,27 +10068,6 @@ nla_put_failure:
}
/* Converts nl80211_chan_width to a common format */
static enum chan_width convert2width(int width)
{
switch (width) {
case NL80211_CHAN_WIDTH_20_NOHT:
return CHAN_WIDTH_20_NOHT;
case NL80211_CHAN_WIDTH_20:
return CHAN_WIDTH_20;
case NL80211_CHAN_WIDTH_40:
return CHAN_WIDTH_40;
case NL80211_CHAN_WIDTH_80:
return CHAN_WIDTH_80;
case NL80211_CHAN_WIDTH_80P80:
return CHAN_WIDTH_80P80;
case NL80211_CHAN_WIDTH_160:
return CHAN_WIDTH_160;
}
return CHAN_WIDTH_UNKNOWN;
}
static int get_channel_width(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
@ -11288,9 +11315,11 @@ static int nl80211_switch_channel(void *priv, struct csa_settings *settings)
struct nlattr *beacon_csa;
int ret = -ENOBUFS;
wpa_printf(MSG_DEBUG, "nl80211: Channel switch request (cs_count=%u block_tx=%u freq=%d)",
wpa_printf(MSG_DEBUG, "nl80211: Channel switch request (cs_count=%u block_tx=%u freq=%d width=%d cf1=%d cf2=%d)",
settings->cs_count, settings->block_tx,
settings->freq_params.freq);
settings->freq_params.freq, settings->freq_params.bandwidth,
settings->freq_params.center_freq1,
settings->freq_params.center_freq2);
if (!drv->channel_switch_supported) {
wpa_printf(MSG_DEBUG, "nl80211: Driver does not support channel switch command");

4
wpa_supplicant/ap.c
View file

@ -1085,13 +1085,13 @@ int ap_ctrl_iface_chanswitch(struct wpa_supplicant *wpa_s, const char *pos)
void wpas_ap_ch_switch(struct wpa_supplicant *wpa_s, int freq, int ht,
int offset)
int offset, int width, int cf1, int cf2)
{
if (!wpa_s->ap_iface)
return;
wpa_s->assoc_freq = freq;
hostapd_event_ch_switch(wpa_s->ap_iface->bss[0], freq, ht, offset);
hostapd_event_ch_switch(wpa_s->ap_iface->bss[0], freq, ht, offset, width, cf1, cf1);
}

2
wpa_supplicant/ap.h
View file

@ -54,7 +54,7 @@ int ap_switch_channel(struct wpa_supplicant *wpa_s,
struct csa_settings *settings);
int ap_ctrl_iface_chanswitch(struct wpa_supplicant *wpa_s, const char *txtaddr);
void wpas_ap_ch_switch(struct wpa_supplicant *wpa_s, int freq, int ht,
int offset);
int offset, int width, int cf1, int cf2);
struct wpabuf * wpas_ap_wps_nfc_config_token(struct wpa_supplicant *wpa_s,
int ndef);
#ifdef CONFIG_AP

5
wpa_supplicant/events.c
View file

@ -2891,7 +2891,10 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
wpas_ap_ch_switch(wpa_s, data->ch_switch.freq,
data->ch_switch.ht_enabled,
data->ch_switch.ch_offset);
data->ch_switch.ch_offset,
data->ch_switch.ch_width,
data->ch_switch.cf1,
data->ch_switch.cf2);
break;
#endif /* CONFIG_AP */
#if defined(CONFIG_AP) || defined(CONFIG_IBSS_RSN)