diff options
| author | Helmut Schaa <helmut.schaa@googlemail.com> | 2009-07-23 13:18:01 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-07-27 15:24:17 -0400 |
| commit | 142b9f5074dc0d09dc0025739ad437723d7bf527 (patch) | |
| tree | 07173ed0ffae8956c1f8938bc41695b1d19cebb0 /net/mac80211/rx.c | |
| parent | fbe9c429f195111bbf7f1630efa19aee295fd8e7 (diff) | |
mac80211: implement basic background scanning
Introduce a new scan flag "SCAN_OFF_CHANNEL" which basically tells us
that we are currently on a different channel for scanning and cannot
RX/TX. "SCAN_SW_SCANNING" tells us that we are currently running a
software scan but we might as well be on the operating channel to RX/TX.
While "SCAN_SW_SCANNING" is set during the whole scan "SCAN_OFF_CHANNEL"
is set when leaving the operating channel and unset when coming back.
Introduce two new scan states "SCAN_LEAVE_OPER_CHANNEL" and
"SCAN_ENTER_OPER_CHANNEL" which basically implement the functionality we
need to leave the operating channel (send a nullfunc to the AP and stop
the queues) and enter it again (send a nullfunc to the AP and start the
queues again).
Enhance the scan state "SCAN_DECISION" to switch back to the operating
channel after each scanned channel. In the future it sould be simple
to enhance the decision state to scan as much channels in a row as the
qos latency allows us.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/rx.c')
| -rw-r--r-- | net/mac80211/rx.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 9c1679d124ba..cb95a3116034 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -421,7 +421,8 @@ ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx) if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning))) return ieee80211_scan_rx(rx->sdata, skb); - if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning))) { + if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning) && + (rx->flags & IEEE80211_RX_IN_SCAN))) { /* drop all the other packets during a software scan anyway */ if (ieee80211_scan_rx(rx->sdata, skb) != RX_QUEUED) dev_kfree_skb(skb); @@ -2136,7 +2137,8 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, return; } - if (unlikely(local->scanning)) + if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) || + test_bit(SCAN_OFF_CHANNEL, &local->scanning))) rx.flags |= IEEE80211_RX_IN_SCAN; ieee80211_parse_qos(&rx); |