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nl80211: conditionally add back TCP WoWLAN information

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Add back the previously removed TCP WoWLAN information,
but only if userspace is prepared to deal with large
wiphy capability data dumps.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-02-20 01:02:38 +01:00
parent cdc89b97bf
commit b56cf72083
1 changed files with 46 additions and 2 deletions
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48
net/wireless/nl80211.c
View file

@ -913,8 +913,49 @@ nla_put_failure:
}
#ifdef CONFIG_PM
static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
struct sk_buff *msg)
{
const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
struct nlattr *nl_tcp;
if (!tcp)
return 0;
nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
if (!nl_tcp)
return -ENOBUFS;
if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
tcp->data_payload_max))
return -ENOBUFS;
if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
tcp->data_payload_max))
return -ENOBUFS;
if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
return -ENOBUFS;
if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
sizeof(*tcp->tok), tcp->tok))
return -ENOBUFS;
if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
tcp->data_interval_max))
return -ENOBUFS;
if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
tcp->wake_payload_max))
return -ENOBUFS;
nla_nest_end(msg, nl_tcp);
return 0;
}
static int nl80211_send_wowlan(struct sk_buff *msg,
struct cfg80211_registered_device *dev)
struct cfg80211_registered_device *dev,
bool large)
{
struct nlattr *nl_wowlan;
@ -956,6 +997,9 @@ static int nl80211_send_wowlan(struct sk_buff *msg,
return -ENOBUFS;
}
if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
return -ENOBUFS;
nla_nest_end(msg, nl_wowlan);
return 0;
@ -1392,7 +1436,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
break;
case 6:
#ifdef CONFIG_PM
if (nl80211_send_wowlan(msg, dev))
if (nl80211_send_wowlan(msg, dev, split))
goto nla_put_failure;
(*split_start)++;
if (split)