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cfg80211: allow userspace to specify client P2P PS support

Browse source 
Legacy clients don't support P2P power save mechanisms, and thus
if a P2P GO has a legacy client connected to it, it has to make
some changes in the PS behavior.

To handle this, add an attribute to specify whether a station supports
P2P PS or not. If the attribute was not specified cfg80211 will assume
that station supports it for P2P GO interface, and does NOT support it
for AP interface, matching the current assumptions in the code.

Signed-off-by: Ayala Beker <[email protected]>
Signed-off-by: Emmanuel Grumbach <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Ayala Beker 2016-03-17 15:41:38 +02:00 • committed by Johannes Berg
commit 17b9424786
3 changed files with 55 additions and 0 deletions
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34
net/wireless/nl80211.c
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@ -403,6 +403,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
[NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
[NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
[NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
};
/* policy for the key attributes */
@ -4006,6 +4007,10 @@ int cfg80211_check_station_change(struct wiphy *wiphy,
statype != CFG80211_STA_AP_CLIENT_UNASSOC)
return -EINVAL;
if (params->support_p2p_ps != -1 &&
statype != CFG80211_STA_AP_CLIENT_UNASSOC)
return -EINVAL;
if (params->aid &&
!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
statype != CFG80211_STA_AP_CLIENT_UNASSOC)
@ -4299,6 +4304,18 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
else
params.listen_interval = -1;
if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
u8 tmp;
tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
if (tmp >= NUM_NL80211_P2P_PS_STATUS)
return -EINVAL;
params.support_p2p_ps = tmp;
} else {
params.support_p2p_ps = -1;
}
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
@ -4422,6 +4439,23 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
params.listen_interval =
nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
u8 tmp;
tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
if (tmp >= NUM_NL80211_P2P_PS_STATUS)
return -EINVAL;
params.support_p2p_ps = tmp;
} else {
/*
* if not specified, assume it's supported for P2P GO interface,
* and is NOT supported for AP interface
*/
params.support_p2p_ps =
dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
}
if (info->attrs[NL80211_ATTR_PEER_AID])
params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
else