From 94778280fabdb6bc76db5509bd95859f1141385b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 10 Oct 2008 13:21:59 +0200 Subject: mac80211: provide sequence numbers I've come to think that not providing sequence numbers for the normal STA mode case was a mistake, at least two drivers now had to implement code they wouldn't otherwise need, and I believe at76_usb and adm8211 might be broken. This patch makes mac80211 assign a sequence number to all those frames that need one except beacons. That means that if a driver only implements modes that do not do beaconing it need not worry about the sequence number. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/ieee80211_i.h | 2 ++ net/mac80211/tx.c | 10 ++++++++++ 2 files changed, 12 insertions(+) (limited to 'net/mac80211') diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 1deb787ff8dc..819844726dd4 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -438,6 +438,8 @@ struct ieee80211_sub_if_data { struct ieee80211_key *keys[NUM_DEFAULT_KEYS]; struct ieee80211_key *default_key; + u16 sequence_number; + /* BSS configuration for this interface. */ struct ieee80211_bss_conf bss_conf; diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 22494bcf488a..8bcabefa86e0 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -600,8 +600,18 @@ ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) if (ieee80211_hdrlen(hdr->frame_control) < 24) return TX_CONTINUE; + /* + * Anything but QoS data that has a sequence number field + * (is long enough) gets a sequence number from the global + * counter. + */ if (!ieee80211_is_data_qos(hdr->frame_control)) { + /* driver should assign sequence number */ info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; + /* for pure STA mode without beacons, we can do it */ + hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); + tx->sdata->sequence_number += 0x10; + tx->sdata->sequence_number &= IEEE80211_SCTL_SEQ; return TX_CONTINUE; } -- cgit v1.2.3