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nl80211: Add FILS discovery support

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FILS discovery attribute, NL80211_ATTR_FILS_DISCOVERY, is nested which
supports following parameters as given in IEEE Std 802.11ai-2016,
Annex C.3 MIB detail:
(1) NL80211_FILS_DISCOVERY_ATTR_INT_MIN - Minimum packet interval
(2) NL80211_FILS_DISCOVERY_ATTR_INT_MAX - Maximum packet interval
(3) NL80211_FILS_DISCOVERY_ATTR_TMPL - Template data

Signed-off-by: Aloka Dixit <alokad@codeaurora.org>
Link: https://lore.kernel.org/r/20200805011838.28166-2-alokad@codeaurora.org
[fix attribute and other names, use NLA_RANGE(), use policy only once]
Link: https://lore.kernel.org/r/010101747a7b38a8-306f06b2-9061-4baf-81c1-054a42a18e22-000000@us-west-2.amazonses.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Aloka Dixit
2020-09-11 00:05:29 +00:00
committed by Johannes Berg
parent 5595870f77
commit 291c49ded2
3 changed files with 112 additions and 0 deletions
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49
net/wireless/nl80211.c
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@@ -376,6 +376,15 @@ nl80211_tid_config_attr_policy[NL80211_TID_CONFIG_ATTR_MAX + 1] = {
NLA_POLICY_NESTED(nl80211_txattr_policy),
};
static const struct nla_policy
nl80211_fils_discovery_policy[NL80211_FILS_DISCOVERY_ATTR_MAX + 1] = {
[NL80211_FILS_DISCOVERY_ATTR_INT_MIN] = NLA_POLICY_MAX(NLA_U32, 10000),
[NL80211_FILS_DISCOVERY_ATTR_INT_MAX] = NLA_POLICY_MAX(NLA_U32, 10000),
NLA_POLICY_RANGE(NLA_BINARY,
NL80211_FILS_DISCOVERY_TMPL_MIN_LEN,
IEEE80211_MAX_DATA_LEN),
};
static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD },
[NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
@@ -684,6 +693,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_SCAN_FREQ_KHZ] = { .type = NLA_NESTED },
[NL80211_ATTR_HE_6GHZ_CAPABILITY] =
NLA_POLICY_EXACT_LEN(sizeof(struct ieee80211_he_6ghz_capa)),
[NL80211_ATTR_FILS_DISCOVERY] =
NLA_POLICY_NESTED(nl80211_fils_discovery_policy),
};
/* policy for the key attributes */
@@ -4874,6 +4885,36 @@ static int nl80211_parse_he_bss_color(struct nlattr *attrs,
return 0;
}
static int nl80211_parse_fils_discovery(struct cfg80211_registered_device *rdev,
struct nlattr *attrs,
struct cfg80211_ap_settings *params)
{
struct nlattr *tb[NL80211_FILS_DISCOVERY_ATTR_MAX + 1];
int ret;
struct cfg80211_fils_discovery *fd = &params->fils_discovery;
if (!wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_FILS_DISCOVERY))
return -EINVAL;
ret = nla_parse_nested(tb, NL80211_FILS_DISCOVERY_ATTR_MAX, attrs,
NULL, NULL);
if (ret)
return ret;
if (!tb[NL80211_FILS_DISCOVERY_ATTR_INT_MIN] ||
!tb[NL80211_FILS_DISCOVERY_ATTR_INT_MAX] ||
!tb[NL80211_FILS_DISCOVERY_ATTR_TMPL])
return -EINVAL;
fd->tmpl_len = nla_len(tb[NL80211_FILS_DISCOVERY_ATTR_TMPL]);
fd->tmpl = nla_data(tb[NL80211_FILS_DISCOVERY_ATTR_TMPL]);
fd->min_interval = nla_get_u32(tb[NL80211_FILS_DISCOVERY_ATTR_INT_MIN]);
fd->max_interval = nla_get_u32(tb[NL80211_FILS_DISCOVERY_ATTR_INT_MAX]);
return 0;
}
static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
const u8 *rates)
{
@@ -5182,6 +5223,14 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
goto out;
}
if (info->attrs[NL80211_ATTR_FILS_DISCOVERY]) {
err = nl80211_parse_fils_discovery(rdev,
info->attrs[NL80211_ATTR_FILS_DISCOVERY],
&params);
if (err)
goto out;
}
nl80211_calculate_ap_params(&params);
if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])