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authorJohannes Berg <johannes.berg@intel.com>2010-11-24 08:10:05 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-11-24 16:19:36 -0500
commitc063dbf52b998b852122dff07a8b8dd430b38437 (patch)
treeb27cc73fa8a1d9ed8fb5b0a1306e8194e18662a9 /net/wireless/nl80211.c
parent79b1c460a0b55e55981c25c56597c4d5d2872de3 (diff)
cfg80211: allow using CQM event to notify packet loss
This adds the ability for drivers to use CQM events to notify about packet loss for specific stations (which could be the AP for the managed mode case). Since the threshold might be determined by the driver (it isn't passed in right now) it will be passed out of the driver to userspace in the event. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r--net/wireless/nl80211.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 8734efa663d1..67ff7e92cb99 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5715,6 +5715,51 @@ nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
nlmsg_free(msg);
}
+void
+nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, const u8 *peer,
+ u32 num_packets, gfp_t gfp)
+{
+ struct sk_buff *msg;
+ struct nlattr *pinfoattr;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
+
+ pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
+ if (!pinfoattr)
+ goto nla_put_failure;
+
+ NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
+
+ nla_nest_end(msg, pinfoattr);
+
+ if (genlmsg_end(msg, hdr) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+ nl80211_mlme_mcgrp.id, gfp);
+ return;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+}
+
static int nl80211_netlink_notify(struct notifier_block * nb,
unsigned long state,
void *_notify)