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mac80211: retransmit TDLS teardown packet through AP if not ACKed

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Since the TDLS peer station might not receive the teardown
packet (e.g., when in PS), this makes sure the packet is
retransmitted - this time through the AP - if the TDLS peer
didn't ACK the packet.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Liad Kaufman 2014-11-09 18:50:08 +02:00 • committed by Johannes Berg
parent 24d342c514
commit 1277b4a9f5
5 changed files with 142 additions and 13 deletions
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25
include/linux/ieee80211.h
View file

@ -19,6 +19,7 @@
#include <linux/types.h>
#include <linux/if_ether.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
/*
* DS bit usage
@ -2418,6 +2419,30 @@ static inline bool ieee80211_check_tim(const struct ieee80211_tim_ie *tim,
return !!(tim->virtual_map[index] & mask);
}
/**
* ieee80211_get_tdls_action - get tdls packet action (or -1, if not tdls packet)
* @skb: the skb containing the frame, length will not be checked
* @hdr_size: the size of the ieee80211_hdr that starts at skb->data
*
* This function assumes the frame is a data frame, and that the network header
* is in the correct place.
*/
static inline int ieee80211_get_tdls_action(struct sk_buff *skb, u32 hdr_size)
{
if (!skb_is_nonlinear(skb) &&
skb->len > (skb_network_offset(skb) + 2)) {
/* Point to where the indication of TDLS should start */
const u8 *tdls_data = skb_network_header(skb) - 2;
if (get_unaligned_be16(tdls_data) == ETH_P_TDLS &&
tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE &&
tdls_data[3] == WLAN_CATEGORY_TDLS)
return tdls_data[4];
}
return -1;
}
/* convert time units */
#define TU_TO_JIFFIES(x) (usecs_to_jiffies((x) * 1024))
#define TU_TO_EXP_TIME(x) (jiffies + TU_TO_JIFFIES(x))