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hostapd: Extend Country element to support 6 GHz band

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Add support for the Country element for the 6 GHz band per IEEE Std
802.11ax-2021, 9.4.2.8 (Country element).

Signed-off-by: Pradeep Kumar Chitrapu <quic_pradeepc@quicinc.com>
This commit is contained in:
Pradeep Kumar Chitrapu 2022-04-07 16:56:51 -07:00 committed by Jouni Malinen
parent f5ad972455
commit ee06165e96
1 changed files with 51 additions and 17 deletions
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66
src/ap/beacon.c
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@ -186,7 +186,8 @@ static u8 * hostapd_eid_pwr_constraint(struct hostapd_data *hapd, u8 *eid)
} }
static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing, static u8 * hostapd_eid_country_add(struct hostapd_data *hapd, u8 *pos,
u8 *end, int chan_spacing,
struct hostapd_channel_data *start, struct hostapd_channel_data *start,
struct hostapd_channel_data *prev) struct hostapd_channel_data *prev)
{ {
@ -198,31 +199,23 @@ static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
/* number of channels */ /* number of channels */
*pos++ = (prev->chan - start->chan) / chan_spacing + 1; *pos++ = (prev->chan - start->chan) / chan_spacing + 1;
/* maximum transmit power level */ /* maximum transmit power level */
if (!is_6ghz_op_class(hapd->iconf->op_class))
*pos++ = start->max_tx_power; *pos++ = start->max_tx_power;
else
*pos++ = 0; /* Reserved when operating on the 6 GHz band */
return pos; return pos;
} }
static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid, static u8 * hostapd_fill_subband_triplets(struct hostapd_data *hapd, u8 *pos,
int max_len) u8 *end)
{ {
u8 *pos = eid;
u8 *end = eid + max_len;
int i; int i;
struct hostapd_hw_modes *mode; struct hostapd_hw_modes *mode;
struct hostapd_channel_data *start, *prev; struct hostapd_channel_data *start, *prev;
int chan_spacing = 1; int chan_spacing = 1;
if (!hapd->iconf->ieee80211d || max_len < 6 ||
hapd->iface->current_mode == NULL)
return eid;
*pos++ = WLAN_EID_COUNTRY;
pos++; /* length will be set later */
os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
pos += 3;
mode = hapd->iface->current_mode; mode = hapd->iface->current_mode;
if (mode->mode == HOSTAPD_MODE_IEEE80211A) if (mode->mode == HOSTAPD_MODE_IEEE80211A)
chan_spacing = 4; chan_spacing = 4;
@ -240,7 +233,8 @@ static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
} }
if (start && prev) { if (start && prev) {
pos = hostapd_eid_country_add(pos, end, chan_spacing, pos = hostapd_eid_country_add(hapd, pos, end,
chan_spacing,
start, prev); start, prev);
start = NULL; start = NULL;
} }
@ -250,10 +244,50 @@ static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
} }
if (start) { if (start) {
pos = hostapd_eid_country_add(pos, end, chan_spacing, pos = hostapd_eid_country_add(hapd, pos, end, chan_spacing,
start, prev); start, prev);
} }
return pos;
}
static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
int max_len)
{
u8 *pos = eid;
u8 *end = eid + max_len;
if (!hapd->iconf->ieee80211d || max_len < 6 ||
hapd->iface->current_mode == NULL)
return eid;
*pos++ = WLAN_EID_COUNTRY;
pos++; /* length will be set later */
os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
pos += 3;
if (is_6ghz_op_class(hapd->iconf->op_class)) {
/* Force the third octet of the country string to indicate
* Global Operating Class (Table E-4) */
eid[4] = 0x04;
/* Operating Triplet field */
/* Operating Extension Identifier (>= 201 to indicate this is
* not a Subband Triplet field) */
*pos++ = 201;
/* Operating Class */
*pos++ = hapd->iconf->op_class;
/* Coverage Class */
*pos++ = 0;
/* Subband Triplets are required only for the 20 MHz case */
if (hapd->iconf->op_class == 131 ||
hapd->iconf->op_class == 136)
pos = hostapd_fill_subband_triplets(hapd, pos, end);
} else {
pos = hostapd_fill_subband_triplets(hapd, pos, end);
}
if ((pos - eid) & 1) { if ((pos - eid) & 1) {
if (end - pos < 1) if (end - pos < 1)
return eid; return eid;