From b56cf720833c4a9d7e6ed96cc9f5c1a1091ff3bc Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 20 Feb 2013 01:02:38 +0100 Subject: [PATCH] nl80211: conditionally add back TCP WoWLAN information 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 --- net/wireless/nl80211.c | 48 ++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 46 insertions(+), 2 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 7701538a0882..c73a4dd4e19f 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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) -- 2.39.2