The scan code unlocks the comlock and calls into the driver. It then
assumes the state hasn't changed from underneath it.
Although I haven't seen this particular condition trigger, I'd like to
be informed if I or anyone else sees it.
What I'm thinking may occur:
* A cancellation comes in during the scan_end call;
* the cancel flag is set;
* but it's never checked, so scandone isn't updated;
* .. and the interface stays in the STA power save mode.
It's a subtle race, if it even exists.
PR: kern/163318
It doesn't _really_ help all that much, I'll commit something to
sys/net/if.c at some point explaining why, but the lock should be held
when checking/manipulating/branching because of said lock.
comlock, I'd like to find and analyse these cases to see if they
really are valid.
So, throw in a lock here and wait for the (hopefully!) inevitable
complaints.
* Change the mesh IE size to be IEEE80211_MESH_CONF_SZ rather than the
size of the structure;
* conf_cap is now a uint8_t rather than a uint16_t (uint16_t in D3.0,
uint8_t in the amendment spec);
* Update mesh config capability bits - earlier bits were from draft X,
current is amendment spec;
* Update the following to be an enum rather than #define and added
a VENDOR entry too from the amendment spec;
IEEE80211_MESHCONF_PATH_*
IEEE80211_MESHCONF_METRIC_*
IEEE80211_MESHCONF_CC_*
IEEE80211_MESHCONF_SYNC_*
IEEE80211_MESHCONF_AUTH_*
* Kept IEEE80211_MESHCONF_FORM_* and IEEE80211_MESHCONF_CAP_* as
defines because they are defined in a way that we need to mask in/out
information;
* In IEEE80211_MESHCONF_CAP_* IEEE80211_MESHCONF_CAP_TBTTA is removed
and 0x80 is made reserved as defined in the amendment spec.
Submitted by: monthadar@gmail.com
Reviewed by: rpaulo
compliance testing.
In order to allow for radar pattern matching to occur, the DFS CAC/NOL
handling needs to be made configurable. This commit introduces a new
sysctl, "net.wlan.dfs_debug", which controls which DFS debug mode
net80211 is in.
* 0 = default, CSA/NOL handling as per normal.
* 1 = announce a CSA, but don't add the channel to the non-occupy list
(NOL.)
* 2 = disable both CSA and NOL - only print that a radar event occured.
This code is not compiled/enabled by default as it breaks regulatory
handling. A user must enable IEEE80211_DFS_DEBUG in their kernel
configuration file for this option to become available.
Obtained from: Atheros
This makes it much easier to determine whether an event occurs in the
net80211 taskqueue (which was called "ath0 taskq") or the ath driver
taskqueue (which is also called "ath0 taskq".)
For example, this particular topology didn't work correctly from all
nodes:
[A] - [B] - [C] - [D]
Submitted by: Monthadar Al Jaberi <monthadar@gmail.com>
Reviewed by: bschmidt, adrian
This allows for multiple MAC addresses to be printed on the same
debugging line. ether_sprintf() uses a static char buffer and
thus isn't very useful here.
Submitted by: Monthadar Al Jaberi <monthadar@gmail.com>
is used.
Although the module _builds_, it fails to load because of a missing symbol from
ieee80211_tdma.c.
Specifics:
* Always build ieee80211_tdma.c in the module;
* only compile in the code if IEEE80211_SUPPORT_TDMA is defined.
* Call it before sending probe responses, so the ACL code has the
chance to reject sending them.
* Pass the whole frame to the ACL code now, rather than just the
destination MAC - that way the ACL module can look at the frame
contents to determine what the response should be.
This is part of some uncommitted work to support band steering.
Sponsored by: Hobnob, Inc.
Some hardware (eg the AR9160 in STA mode) seems to "leak" unicast FROMDS
frames which aren't destined to itself. This angers the net80211 stack -
the existing code would fail to find an address in the node table and try
passing the frame up to each vap BSS. It would then be accepted in the
input routine and its contents would update the local crypto and sequence
number state.
If the sequence number / crypto IV replay counters from the leaked frame
were greater than the "real" state, subsequent "real" frames would be
rejected due to out of sequence / IV replay conditions.
This is also likely helpful if/when multi-STA modes are added to net80211.
Sponsored by: Hobnob, Inc.
This supports both station and hostap modes:
* Station mode quiet time element support listens to quiet time
IE's and modifies the local quiet time configuration as appropriate;
* Hostap mode both obeys the locally configured quiet time period
and includes it in beacon frames so stations also can obey as needed.
Submitted by: Himali Patel <himali.patel@sibridgetech.com>
Sponsored by: Sibridge Technologies
The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.
I found this useful when trying to debug the AR9160 STA RX filter issue -
I'd get crypto reply errors but it wasn't entirely clear which TID it
was for.
The ieee80211_swbmiss() callout is not called with the ic lock held, so it's
quite possible the scheduler will run the callout during a state change.
This patch:
* changes the swbmiss callout to be locked by the ic lock
* enforces the ic lock being held across the beacon vap functions
by grabbing it inside beacon_miss() and beacon_swmiss().
This ensures that the ic lock is held (and thus the VAP state
stays constant) during beacon miss and software miss processing.
Since the callout is removed whilst the ic lock is held, it also
ensures that the ic lock can't be called during a state change
or exhibit any race conditions seen above.
Both Edgar and Joel report that this patch fixes the crash and
doesn't introduce new issues.
Reported by: Edgar Martinez <emartinez@kbcnetworks.com>
Reported by: Joel Dahl <joel@vnode.se>
Reported by: emaste
didn't set a sequence number; it didn't show up earlier because the
hardware most people use for hostap (ie, AR5212 series stuff) sets the
sequence numbers up in hardware. Later hardware (AR5416, etc) which
can do 11n and aggregation require sequence numbers to be generated in
software.
Submitted by: paradyse@gmail.com
Approved by: re (kib)
On a TX failure, ic_raw_xmit will still call ieee80211_node_free().
There's no need to call it here.
Submitted by: moonlightakkiy@yahoo.ca
Approved by: re (kib)
channel list ends up with 2 entries, the HT and the legacy channel.
The scan itself is currently always done at legacy rates so we end
up receiving scan results for legacy networks on the HT channel and
erroneously assigning the BSS to the 11n channel. As the channel's
capabilities are used to setup the adapter we might end up with
non-working settings and/or firmware crashes.
Fix this by ensuring that scan results received on a HT channel
are only assigned to that channel if the htcap IE is available,
else use the legacy channel equivalent.
Tested by: Pawel Worach, Raoul Megelas, Maciej Milewski,
Andrei <az at azsupport dot com>
Approved by: re (kib)
TX for the given TID needs to be paused during ADDBA requests (and unpaused
once the session is established.) Since net80211 currently doesn't implement
software aggregation, if this pause/unpause is done in the driver (as it
is in my development branch) then it will need to be unpaused both on
ADDBA response and on ADDBA timeout.
This callback allows the driver to unpause TX for the relevant TID.
Reviewed by: bschmidt
Intel 4965 devices for example have HT40 on 2GHz completely disabled
but it is still supported for 5GHz. To handle that in sta mode we
need to check if we can "upgrade" to a HT40 channel after the
association, if that is not possible but we are still announcing
support to the remote side we are left with a very flabby connection.
Reviewed by: adrian
too. In that case don't fiddle with the seqno as drivers are supposed
to handle that.
Currently only the powersave feature does sent QoS-null-data frames
before and after a background scan which must be handled correctly. Due
to this being quite rare we don't fiddle around with starting of aggr
sessions.
* revert a local path change that shouldn't have made it to the commit
* fix some indenting/wrapping
* Fix the ale data copy - i should be copying into the ale data pointer,
not over the ale entry itself.
handling.
The current sequence number code does a few things incorrectly:
* It didn't try eliminating duplications from HT nodes. I guess it's assumed
that out of order / retransmission handling would be handled by the AMPDU RX
routines. If a HT node isn't doing AMPDU RX, then retransmissions need to
be eliminated. Since most of my debugging is based on this (as AMPDU TX
software packet aggregation isn't yet handled), handle this corner case.
* When a sequence number of 4095 was received, any subsequent sequence number
is going to be (by definition) less than 4095. So if the following sequence
number (0) doesn't initially occur and the retransmit is received, it's
incorrectly eliminated by the IEEE80211_FC1_RETRY && SEQ_LEQ() check.
Try to handle this better.
This almost completely eliminates out of order TCP statistics showing up during
iperf testing for the 11a, 11g and non-aggregate 11n AMPDU RX case. The only
other packet loss conditions leading to this are due to baseband resets or
heavy interference.
