提交 f44349f2 编写于 作者: J James Ketrenos 提交者: John W. Linville

[PATCH] ieee80211: Don't update network statistics from off-channel packets.

This patch fixes a problem in the ieee80211 probe response and beacon
reception code that would use the packet statistics for a network even
if they were received on a channel other than that which the network
exists on.

This causes a problem in overlapping channels where, for example, a
strong AP on channel 2 could have its beacons received on channels 1 and
3, but at much lower signal levels.  If scanning was done sequentially,
this means the beacon received on channel 3 would update the AP's signal
level as being much lower than it really is, which subsequently could
cause that AP to be passed over and an alternate AP selected.
Signed-off-by: NJames Ketrenos <jketreno@linux.intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
上级 7c567894
......@@ -1345,7 +1345,19 @@ static void update_network(struct ieee80211_network *dst,
ieee80211_network_reset(dst);
dst->ibss_dfs = src->ibss_dfs;
memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
/* We only update the statistics if they were created by receiving
* the network information on the actual channel the network is on.
*
* This keeps beacons received on neighbor channels from bringing
* down the signal level of an AP. */
if (dst->channel == src->stats.received_channel)
memcpy(&dst->stats, &src->stats,
sizeof(struct ieee80211_rx_stats));
else
IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
"off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
dst->channel, src->stats.received_channel);
dst->capability = src->capability;
memcpy(dst->rates, src->rates, src->rates_len);
dst->rates_len = src->rates_len;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册