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nl80211: add handling for BSS color 

This patch adds the attributes, policy and parsing code to allow userland
to send the info about the BSS coloring settings to the kernel.

Signed-off-by: John Crispin <john@phrozen.org>
Link: https://lore.kernel.org/r/20191217141921.8114-1-john@phrozen.org
[johannes: remove the strict policy parsing, that was a misunderstanding]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
John Crispin 2019-12-17 15:19:18 +01:00 committed by Johannes Berg
parent b18379d7aa
commit 5c5e52d1bb
3 changed files with 81 additions and 0 deletions
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15
include/net/cfg80211.h
View File

@ -259,6 +259,19 @@ struct ieee80211_he_obss_pd {
u8 max_offset;
};
/**
* struct cfg80211_he_bss_color - AP settings for BSS coloring
*
* @color: the current color.
* @disabled: is the feature disabled.
* @partial: define the AID equation.
*/
struct cfg80211_he_bss_color {
u8 color;
bool disabled;
bool partial;
};
/**
* struct ieee80211_sta_ht_cap - STA's HT capabilities
*
@ -990,6 +1003,7 @@ enum cfg80211_ap_settings_flags {
* @twt_responder: Enable Target Wait Time
* @flags: flags, as defined in enum cfg80211_ap_settings_flags
* @he_obss_pd: OBSS Packet Detection settings
* @he_bss_color: BSS Color settings
*/
struct cfg80211_ap_settings {
struct cfg80211_chan_def chandef;
@ -1018,6 +1032,7 @@ struct cfg80211_ap_settings {
bool twt_responder;
u32 flags;
struct ieee80211_he_obss_pd he_obss_pd;
struct cfg80211_he_bss_color he_bss_color;
};
/**

26
include/uapi/linux/nl80211.h
View File

@ -2400,6 +2400,8 @@ enum nl80211_commands {
* @NL80211_ATTR_VLAN_ID: VLAN ID (1..4094) for the station and VLAN group key
* (u16).
*
* @NL80211_ATTR_HE_BSS_COLOR: nested attribute for BSS Color Settings.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@ -2864,6 +2866,8 @@ enum nl80211_attrs {
NL80211_ATTR_VLAN_ID,
NL80211_ATTR_HE_BSS_COLOR,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@ -6587,5 +6591,27 @@ enum nl80211_obss_pd_attributes {
NL80211_HE_OBSS_PD_ATTR_MAX = __NL80211_HE_OBSS_PD_ATTR_LAST - 1,
};
/**
* enum nl80211_bss_color_attributes - BSS Color attributes
* @__NL80211_HE_BSS_COLOR_ATTR_INVALID: Invalid
*
* @NL80211_HE_BSS_COLOR_ATTR_COLOR: the current BSS Color.
* @NL80211_HE_BSS_COLOR_ATTR_DISABLED: is BSS coloring disabled.
* @NL80211_HE_BSS_COLOR_ATTR_PARTIAL: the AID equation to be used..
*
* @__NL80211_HE_BSS_COLOR_ATTR_LAST: Internal
* @NL80211_HE_BSS_COLOR_ATTR_MAX: highest BSS Color attribute.
*/
enum nl80211_bss_color_attributes {
__NL80211_HE_BSS_COLOR_ATTR_INVALID,
NL80211_HE_BSS_COLOR_ATTR_COLOR,
NL80211_HE_BSS_COLOR_ATTR_DISABLED,
NL80211_HE_BSS_COLOR_ATTR_PARTIAL,
/* keep last */
__NL80211_HE_BSS_COLOR_ATTR_LAST,
NL80211_HE_BSS_COLOR_ATTR_MAX = __NL80211_HE_BSS_COLOR_ATTR_LAST - 1,
};
#endif /* __LINUX_NL80211_H */

40
net/wireless/nl80211.c
View File

@ -321,6 +321,13 @@ he_obss_pd_policy[NL80211_HE_OBSS_PD_ATTR_MAX + 1] = {
NLA_POLICY_RANGE(NLA_U8, 1, 20),
};
static const struct nla_policy
he_bss_color_policy[NL80211_HE_BSS_COLOR_ATTR_MAX + 1] = {
[NL80211_HE_BSS_COLOR_ATTR_COLOR] = NLA_POLICY_RANGE(NLA_U8, 1, 63),
[NL80211_HE_BSS_COLOR_ATTR_DISABLED] = { .type = NLA_FLAG },
[NL80211_HE_BSS_COLOR_ATTR_PARTIAL] = { .type = NLA_FLAG },
};
const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD },
[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
@ -625,6 +632,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_TWT_RESPONDER] = { .type = NLA_FLAG },
[NL80211_ATTR_HE_OBSS_PD] = NLA_POLICY_NESTED(he_obss_pd_policy),
[NL80211_ATTR_VLAN_ID] = NLA_POLICY_RANGE(NLA_U16, 1, VLAN_N_VID - 2),
[NL80211_ATTR_HE_BSS_COLOR] = NLA_POLICY_NESTED(he_bss_color_policy),
};
/* policy for the key attributes */
@ -4511,6 +4519,30 @@ static int nl80211_parse_he_obss_pd(struct nlattr *attrs,
return 0;
}
static int nl80211_parse_he_bss_color(struct nlattr *attrs,
struct cfg80211_he_bss_color *he_bss_color)
{
struct nlattr *tb[NL80211_HE_BSS_COLOR_ATTR_MAX + 1];
int err;
err = nla_parse_nested(tb, NL80211_HE_BSS_COLOR_ATTR_MAX, attrs,
he_bss_color_policy, NULL);
if (err)
return err;
if (!tb[NL80211_HE_BSS_COLOR_ATTR_COLOR])
return -EINVAL;
he_bss_color->color =
nla_get_u8(tb[NL80211_HE_BSS_COLOR_ATTR_COLOR]);
he_bss_color->disabled =
nla_get_flag(tb[NL80211_HE_BSS_COLOR_ATTR_DISABLED]);
he_bss_color->partial =
nla_get_flag(tb[NL80211_HE_BSS_COLOR_ATTR_PARTIAL]);
return 0;
}
static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
const u8 *rates)
{
@ -4803,6 +4835,14 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
return err;
}
if (info->attrs[NL80211_ATTR_HE_BSS_COLOR]) {
err = nl80211_parse_he_bss_color(
info->attrs[NL80211_ATTR_HE_BSS_COLOR],
&params.he_bss_color);
if (err)
return err;
}
nl80211_calculate_ap_params(&params);
if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])