Commit Graph

178 Commits

Author SHA1 Message Date
Sam Leffler
5463c4a485 Overhaul monitor mode handling:
o replace DLT_IEEE802_11 support in net80211 with DLT_IEEE802_11_RADIO
  and remove explicit bpf support from wireless drivers; drivers now
  use ieee80211_radiotap_attach to setup shared data structures that
  hold the radiotap header for each packet tx/rx
o remove rx timestamp from the rx path; it was used only by the tdma support
  for debugging and was mostly useless due to it being 32-bits and mostly
  unavailable
o track DLT_IEEE80211_RADIO bpf attachments and maintain per-vap and
  per-com state when there are active taps
o track the number of monitor mode vaps
o use bpf tap and monitor mode vap state to decide when to collect radiotap
  state and dispatch frames; drivers no longer explicitly directly check
  bpf state or use bpf calls to tap frames
o handle radiotap state updates on channel change in net80211; drivers
  should not do this (unless they bypass net80211 which is almost always
  a mistake)
o update various drivers to be more consistent/correct in handling radiotap
o update ral to include TSF in radiotap'd frames
o add promisc mode callback to wi

Reviewed by:	cbzimmer, rpaulo, thompsa
2009-05-20 20:00:40 +00:00
Sam Leffler
70ca3d6a9f correct handling of ctl frames: the sender's address is always i_addr2 for
frames we should expect to process (old code was trying to handle frames
we should never see--like ACK)

Reviewed by:	thompsa, cbzimmer
2009-05-14 16:23:24 +00:00
Andrew Thompson
5efea30f03 Create a taskqueue for each wireless interface which provides a serialised
sleepable context for net80211 driver callbacks. This removes the need for USB
and firmware based drivers to roll their own code to defer the chip programming
for state changes, scan requests, channel changes and mcast/promisc updates.
When a driver callback completes the hardware state is now guaranteed to have
been updated and is in sync with net80211 layer.

This nukes around 1300 lines of code from the wireless device drivers making
them more readable and less race prone.

The net80211 layer has been updated as follows
 - all state/channel changes are serialised on the taskqueue.
 - ieee80211_new_state() always queues and can now be called from any context
 - scanning runs from a single taskq function and executes to completion. driver
   callbacks are synchronous so the channel, phy mode and rx filters are
   guaranteed to be set in hardware before probe request frames are
   transmitted.

Help and contributions from Sam Leffler.

Reviewed by:	sam
2009-05-02 15:14:18 +00:00
Sam Leffler
c5262b82e6 fix txparms setup for 108G sta's: ieee80211_iserp_rateset does not
identify a station operating in turbo-boost mode because it has a
pure ofdm rate set; add an explicit check for the channel type
instead of depending on IEEE80211_NODE_ERP being set
2009-04-13 20:45:29 +00:00
Sam Leffler
339ccfb391 Hoist 802.11 encapsulation up into net80211:
o call ieee80211_encap in ieee80211_start so frames passed down to drivers
  are already encapsulated
o remove ieee80211_encap calls in drivers
o fixup wi so it recreates the 802.3 head it requires from the 802.11
  header contents
o move fast-frame aggregation from ath to net80211 (conditional on
  IEEE80211_SUPPORT_SUPERG):
  - aggregation is now done in ieee80211_start; it is enabled when the
    packets/sec exceeds ieee80211_ffppsmin (net.wlan.ffppsmin) and frames
    are held on a staging queue according to ieee80211_ffagemax
    (net.wlan.ffagemax) to wait for a frame to combine with
  - drivers must call back to age/flush the staging queue (ath does this
    on tx done, at swba, and on rx according to the state of the tx queues
    and/or the contents of the staging queue)
  - remove fast-frame-related data structures from ath
  - add ieee80211_ff_node_init and ieee80211_ff_node_cleanup to handle
    per-node fast-frames state (we reuse 11n tx ampdu state)
o change ieee80211_encap calling convention to include an explicit vap
  so frames coming through a WDS vap are recognized w/o setting M_WDS

With these changes any device able to tx/rx 3Kbyte+ frames can use fast-frames.

Reviewed by:	thompsa, rpaulo, avatar, imp, sephe
2009-03-30 21:53:27 +00:00
Sam Leffler
26d39e2c68 o add ic_rt to track the rate table for the current channel; this enables
calculation of packet transmit times to do things like check txop limits
o remove equivalent driver code and convert to use net80211 state
2009-03-29 21:17:08 +00:00
Sam Leffler
616190d079 split Atheros SuperG support out into it's own file that's included only
with a new IEEE80211_SUPPORT_SUPERG option
2009-03-24 20:39:08 +00:00
Sam Leffler
aa68c24fb7 mark nodes created by way of neighbor discovery need to be marked as ERP
so they get the correct tx parameters setup by node_settxparms
2009-02-20 23:05:05 +00:00
Sam Leffler
6a76ae216e Add modes for 1/2 and 1/4-width channels so we have separate roaming
and xmit parameters.  This makes it possible to use tdma on fractional
channels.
o add IEEE80211_MODE_HALF and IEEE80211_MODE_QUARTER; note these are
  band-agnostic (may need revisiting)
o setup all default rates in ic_sup_rates instead of doing it only
  for active modes; we need these to calculate the default tx parameters
  which are not recalculated after a regulatory update (can't just
  recalculate after installing a new channel list because we might
  clobber user settings)
o remove special case code in ieee80211_get_suprates; this is now
  a candidate for an inline or removal
o add various entries for new modes (roaming+tx params, wme, rate
  mapping, scan set setup, country ie construction, tdma, basic rates)

Note these modes are intentionally not visible through if_media.
2009-02-19 05:21:54 +00:00
Sam Leffler
47a7b0fa21 o replace ieee80211_node_reclaim by individual operations to release the
references to iv_bss and the sta table; this is equivalent and causes
  direct reclaim of the old bss node when any references in packets inflight
  are reclaimed (previously the old node would sit in the bss table until
  the inactivity processing reclaimed it)
o remove ieee80211_node_reclaim now that it's only use is gone

Reviewed by:	avatar, cbzimmer
2009-02-12 23:34:58 +00:00
Sam Leffler
73bac36f82 improve key index map reclaim debug msg 2009-02-11 18:40:09 +00:00
Sam Leffler
f76cde9515 set ni_txparms for static turbo mode 2009-01-29 23:11:18 +00:00
Sam Leffler
10ad9a77f3 TDMA support for long distance point-to-point links using ath devices:
o add net80211 support for a tdma vap that is built on top of the
  existing adhoc-demo support
o add tdma scheduling of frame transmission to the ath driver; it's
  conceivable other devices might be capable of this too in which case
  they can make use of the 802.11 protocol additions etc.
o add minor bits to user tools that need to know: ifconfig to setup and
  configure, new statistics in athstats, and new debug mask bits

While the architecture can support >2 slots in a TDMA BSS the current
design is intended (and tested) for only 2 slots.

Sponsored by:	Intel
2009-01-08 17:12:47 +00:00
Sam Leffler
6ca74c40de only mark an infrastructure node to require an associd for xmit; fixes adhoc
mode sta's that join an existing ibss
2009-01-07 18:17:36 +00:00
Sam Leffler
9094ffdfe3 mark discovered neighbors QoS capable if they advertise wme 2008-12-31 21:29:09 +00:00
Sam Leffler
e2126dec84 convert MALLOC/FREE to malloc/free 2008-12-18 23:00:09 +00:00
Sam Leffler
ca92652af7 Fix ucastkey teardown for drivers that plumb clear keys or similar
(e.g. ath): we must check the key index and not whether the key
points at a cipher other than "undef".  This looks like it's been
broken for a while.  Might be worth adding an explicit clear cipher
at some point though this would require changes to the usage of
IEEE80211_KEY_UNDEFINED.

PR:		125906
2008-12-15 22:50:50 +00:00
Sam Leffler
1b999d643c Replace adhoc checks in ieee80211_start with a per-node flag that
indicates if an association id is required before outbound traffic
is permitted.  This cleans up the previous change that broke mcast
traffic "to the stack" in ap mode as a side effect.

Reviewed by:	sephe, thompsa, weongyo
2008-12-15 00:47:24 +00:00
Sam Leffler
5d44f8c024 o re-enable a lock assert
o while here reformat a comment to sync w/ other repot's
2008-10-26 21:59:07 +00:00
Sam Leffler
63092fce49 New ap-side power save implementation; the main change is to allow drivers
to queue frames previously encapsulated on a separate high priority list
that is dispatched before the unencapsulated frames (to preserve order).
2008-10-26 01:04:46 +00:00
Sam Leffler
dfcd1f4d0e set erp flag and tx parameter state when joining a bss; this allows
drivers to use ni_txparms
2008-10-25 23:44:25 +00:00
Sam Leffler
be1054ed14 improve inactivity handling debug support 2008-10-25 23:40:48 +00:00
Sam Leffler
1095925656 change ieee80211_sta_join to take an explicit channel instead of
using the value in the scan parameters; this will be used to fix
issues with 11b operation
2008-10-25 23:32:24 +00:00
Dag-Erling Smørgrav
c5abbba314 Revert the removal of the MALLOC and FREE macros from the net80211 code.
Requested by:	sam
2008-10-23 19:57:13 +00:00
Dag-Erling Smørgrav
1ede983cc9 Retire the MALLOC and FREE macros. They are an abomination unto style(9).
MFC after:	3 months
2008-10-23 15:53:51 +00:00
Sam Leffler
b9b5f07d1c cleanup bss node setup; syncs w/ p4 state that's been in use for months 2008-09-22 00:22:09 +00:00
Sam Leffler
44f7a6edcf RIFS support; needs driver callback for dynamic state change 2008-09-22 00:10:22 +00:00
Sam Leffler
8c070d69c7 MIMO power save support; still needs callbacks for notifying drivers
of dynamic state change in station mode.
2008-09-21 23:59:14 +00:00
Sam Leffler
01a03542b1 Add current transmit parameters for fixed rate handling so drivers
don't duplicate this.  These are setup according to the role of the
node--the bss node for ap and adhoc modes need to use parameters
that are the least common denomimator of all nodes in the bss;
otherwise we are setting up params for a station joining a bss and
we select those according to the capabilities of the station.

This stuff needs more work as we do extra work due to having setup
in common code paths shared by nodes using both roles.
2008-09-21 23:25:33 +00:00
Sam Leffler
0f52b1c477 make all checks if ni_chw consistent 2008-09-06 17:51:02 +00:00
Sam Leffler
38c208f876 Change the calling convention for ic_node_alloc to deal with
some longstanding issues:
o pass the vap since it's now the "coin of the realm" and required
  to do things like set initial tx parameters in private node
  state for use prior to association
o pass the mac address as cards that maintain outboard station
  tables require this to create an entry (e.g. in ibss mode)
o remove the node table reference, we only have one node table
  and it's unlikely this will change so this is not needed to
  find the com structure
2008-06-07 18:38:02 +00:00
Sam Leffler
2dc4d8dc89 Split ieee80211_notify_erp into locked and unlocked variants
and use the locked version to handle the hostap input path
case where the com lock is not already held.

Noticed by:	Jared Go
2008-06-07 17:51:41 +00:00
Sam Leffler
37e9743a00 Fix node cleanup issues when the last reference is held by
the driver (e.g. in the tx q); ni_vap may not be valid, we
must carefully check before using it.
2008-06-07 17:50:24 +00:00
Sam Leffler
13f91245d2 correct code returned in AsssocResp; the previous code is spec'd for use
only in deauth+disassoc frames

Submitted by:	Chris Zimmermann
MFC after:	1 month
2008-06-07 17:43:41 +00:00
Sam Leffler
34c9a6c7f0 Don't override the txpower cap installed by ieee80211_alloc_node;
we use ic_txpowlimit (for now) to initialize all new sta entries.
2008-05-28 23:18:17 +00:00
Sam Leffler
a2cfa5b7ee special-case broadcast probe request in ieee80211_find_rxnode; we need
to spam all vaps and this won't happen if the frame comes from a station
that is associated to an ap vap (and so has an entry in the table)

Noticed by:	Jared Go
Reviewed by:	thompsa
2008-05-22 22:22:10 +00:00
Sam Leffler
92172ed85a fix build w/ IEEE80211_DEBUG_REFCNT enabled 2008-05-01 20:26:25 +00:00
Sam Leffler
b032f27c36 Multi-bss (aka vap) support for 802.11 devices.
Note this includes changes to all drivers and moves some device firmware
loading to use firmware(9) and a separate module (e.g. ral).  Also there
no longer are separate wlan_scan* modules; this functionality is now
bundled into the wlan module.

Supported by:	Hobnob and Marvell
Reviewed by:	many
Obtained from:	Atheros (some bits)
2008-04-20 20:35:46 +00:00
Sam Leffler
ce8977dff3 o correct re-association indicator dispatched in node join event
o remove misleading "reassociation" msg on sta join

MFC after:	3 days
2007-11-23 06:23:12 +00:00
Sam Leffler
cb42c5bba6 parse htcap ie early so ampdu density and max rx size are available
for constructing the AssocReq frame

MFC after:	3 days
2007-11-23 06:13:39 +00:00
Sam Leffler
1b6167d239 sync 11n support with vap code base; many changes based on interop
testing with all major vendors

MFC after:	1 week
2007-11-02 05:22:25 +00:00
Sam Leffler
5698ab1ad3 Close longstanding race dropping inactive stations; grab a reference
to the node before starting the work, otherwise the node may go
away before a reference is made in ieee80211_send_mgmt.

Approved by:	re (blanket wireless)
Obtained from:	Atheros
2007-09-18 21:01:04 +00:00
Sam Leffler
e5ac9e91bd Safeguard count of stations in power save; don't touch it unless we're
operating in a mode where it should be maintained.

Approved by:	re (blanket wireless)
MFC after:	2 weeks
2007-09-18 20:55:51 +00:00
Sam Leffler
b105a06908 Update beacon handling to sync w/ vap code base:
o add driver callback to handle notification of beacon changes;
  this is required for devices that manage beacon frames themselves
  (devices must override the default handler which does nothing)
o move beacon update-related flags from ieee80211com to the beacon
  offsets storage (or handle however a driver wants)
o expand beacon offsets structure with members needed for 11h/dfs
  and appie's
o change calling convention for ieee80211_beacon_alloc and
  ieee80211_beacon_update
o add overlapping bss support for 11g; requires driver to pass
  beacon frames from overlapping bss up to net80211 which is not
  presently done by any driver
o move HT beacon contents update to a routine in the HT code area

Reviewed by:	avatar, thompsa, sephe
Approved by:	re (blanket wireless)
2007-09-17 19:07:24 +00:00
Sam Leffler
7595008bb1 oops, add missing bit from last change
Approved by:	re (blanket wireless)
2007-09-06 00:08:02 +00:00
Sam Leffler
c066143c08 Fixup sta inactivity handling:
o reset ni_inact when ni_inact_reload is changed so we're
  assured a valid setting
o never let ni_inact go negative
o add a knob to disable hostap sta idle handling (e.g. so it can be done
  by a user application)
o remove bogus reload on associate

Reviewed by:	avatar
Approved by:	re (blanket wireless)
2007-09-06 00:04:36 +00:00
Sam Leffler
68e8e04e93 Update 802.11 wireless support:
o major overhaul of the way channels are handled: channels are now
  fully enumerated and uniquely identify the operating characteristics;
  these changes are visible to user applications which require changes
o make scanning support independent of the state machine to enable
  background scanning and roaming
o move scanning support into loadable modules based on the operating
  mode to enable different policies and reduce the memory footprint
  on systems w/ constrained resources
o add background scanning in station mode (no support for adhoc/ibss
  mode yet)
o significantly speedup sta mode scanning with a variety of techniques
o add roaming support when background scanning is supported; for now
  we use a simple algorithm to trigger a roam: we threshold the rssi
  and tx rate, if either drops too low we try to roam to a new ap
o add tx fragmentation support
o add first cut at 802.11n support: this code works with forthcoming
  drivers but is incomplete; it's included now to establish a baseline
  for other drivers to be developed and for user applications
o adjust max_linkhdr et. al. to reflect 802.11 requirements; this eliminates
  prepending mbufs for traffic generated locally
o add support for Atheros protocol extensions; mainly the fast frames
  encapsulation (note this can be used with any card that can tx+rx
  large frames correctly)
o add sta support for ap's that beacon both WPA1+2 support
o change all data types from bsd-style to posix-style
o propagate noise floor data from drivers to net80211 and on to user apps
o correct various issues in the sta mode state machine related to handling
  authentication and association failures
o enable the addition of sta mode power save support for drivers that need
  net80211 support (not in this commit)
o remove old WI compatibility ioctls (wicontrol is officially dead)
o change the data structures returned for get sta info and get scan
  results so future additions will not break user apps
o fixed tx rate is now maintained internally as an ieee rate and not an
  index into the rate set; this needs to be extended to deal with
  multi-mode operation
o add extended channel specifications to radiotap to enable 11n sniffing

Drivers:
o ath: add support for bg scanning, tx fragmentation, fast frames,
       dynamic turbo (lightly tested), 11n (sniffing only and needs
       new hal)
o awi: compile tested only
o ndis: lightly tested
o ipw: lightly tested
o iwi: add support for bg scanning (well tested but may have some
       rough edges)
o ral, ural, rum: add suppoort for bg scanning, calibrate rssi data
o wi: lightly tested

This work is based on contributions by Atheros, kmacy, sephe, thompsa,
mlaier, kevlo, and others.  Much of the scanning work was supported by
Atheros.  The 11n work was supported by Marvell.
2007-06-11 03:36:55 +00:00
Sam Leffler
ae8b733312 copyright updates:
o update to include 2007
o switch back to a 2-clause bsd-only license

Reviewed by:	onoe
2007-06-06 04:56:04 +00:00
Sam Leffler
70e28b9a2d change ieee80211_fix_rate to take a rate set instead of using
ni_rates; this lets us re-use the code to check 11n HT rates

MFC after:	2 weeks
2007-03-11 07:22:21 +00:00
Sam Leffler
801df4a58c keep tx/rx seq #'s for non-QoS traffic separate from QoS; stations
aren't supposed mix traffic but if they did frames might be mis-handled

Obtained from:	Atheros
MFC after:	2 weeks
2007-03-11 07:06:08 +00:00
Sam Leffler
fe49f061b4 when starting up an ibss master use a random address for
the bssid; this is required for wifi alliance compliance

Obtained from:	Atheros
MFC after:	2 weeks
2007-03-07 04:31:49 +00:00
Sam Leffler
ca4ac7ae14 Add initial support for 900MHz cards like the Ubiquiti SR9:
o add channel flag to enable freq <-> ieee channel # mapping (can
  go away in the future when ieee number is precomputed)
o add mapping between 900mhz freq's and channel #'s that gives a
  unique channel # for each half/quarter/full width channel
o remove assumptions that half/quarter rate channels on happen in 11a
o remove assumptions that all 11g channels are full width
o ensure ic_curchan is reset on mode change so changing the channel
  list (e.g. on countrycode change) doesn't leave curchan set to an
  invalid channel

There is still an issue with switching rate sets; to be fixed separately.

MFC after:	1 month
2007-01-15 01:12:28 +00:00
Sam Leffler
79edaebfe4 Correct several issues with rate set negotiation:
o add IEEE80211_F_JOIN flag to ieee80211_fix_rate to indicate a station
  is joining a BSS; this is used to control whether or not we over-write
  the basic rate bit in the calculated rate set
o fix ieee80211_fix_rate to honor IEEE80211_F_DODEL when IEEE80211_F_DONEGO
  is not specified (e.g. when joining an ibss network)
o on sta join always delete unusable rates from the negotiated rate set,
  this was being done only ibss networks but is also needed for 11g bss
  with mixed stations
o on sta join delete unusable rates from the bss node's rate set, not the
  scan table entry's rate set
o when calculating a rate set for new neighbors in an ibss caculate a
  negotiated rate set so drivers are not presented with rates they should
  not use

Submitted by:	Sepherosa Ziehau (w/ modifications)
Obtained from:	DragonFly
MFC after:	1 month
2007-01-08 17:24:51 +00:00
Sam Leffler
41b3c790eb First cut at half/quarter-rate 11a channel support (e.g. for use
in the Public Safety Band):
o add channel flags to identify half/quarter-rate operation
o add rate sets (need to check spec on 4Mb/s in 1/4 rate)
o add if_media definitions for new rates
o split net80211 channel setup out into ieee80211_chan_init
o fixup ieee80211_mhz2ieee and ieee80211_ieee2mhz to understand half/quarter
  rate channels: note we temporarily use a nonstandard/hack numbering that
  avoids overlap with 2.4G channels because we don't (yet) have enough
  state to identify and/or map overlapping channel sets
o fixup ieee80211_ifmedia_init so it can be called post attach and will
  recalculate the channel list and associated state; this enables changing
  channel-related state like the regulatory domain after attach (will be
  needed for 802.11d support too)
o add ieee80211_get_suprates to return a reference to the supported rate
  set for a given channel
o add 3, 4.5, and 27 MB/s tx rates to rate <-> media conversion routines
o const-poison channel arg to ieee80211_chan2mode
2006-12-27 18:46:18 +00:00
Diomidis Spinellis
132142c572 Move conditional preprocessing out from the IEEE80211_DPRINTF macro
invocation.  Per C99 6.10.3 paragraph 11 preprocessing directives
appearing as macro arguments yield undefined behavior.
2006-06-01 14:06:32 +00:00
Sam Leffler
ee25b8df01 Ensure outbound data packets in hostap mode are delivered only to
stations that are associated by making ieee80211_find_txnode return
NULL when a unicast frame is to be delivered to an unassociated
station.  This will be handled differently in the future but for
now putting the check here allows all drivers to immediately do
the right thing.

Reviewed by:	avatar
MFC after:	1 week
2006-04-28 19:06:15 +00:00
Sam Leffler
097131fffe when scanning channels marked passive defer probe request until
802.11 traffic is seen; fixes problems with ap's hiding their ssid

Obtained from:	atheros
MFC after:	1 week
2006-03-06 17:23:26 +00:00
Sam Leffler
a1a5050276 bump the scan generation number before iterating so we're guaranteed
to have a value that's not been used before; this fixes the problem
where the first traversal of the scan list did nothing because the
entries were initialized with the current generation number (a
separate issue)

MFC after:	1 week
2006-01-18 19:56:17 +00:00
Sam Leffler
0912bac9b3 update erp information element in the beacon frame to reflect
changes in the bss

Reviewed by:	avatar
Obtained from:	atheros
MFC after:	2 weeks
2006-01-02 16:57:20 +00:00
Sam Leffler
8e292e8ecd When creating neighbor entries for an ahdemo bss apply the local
settings.  In particular this allows us to use QoS frames in a
bss and in turn enables disabling ack's.
2005-12-14 01:18:36 +00:00
Sam Leffler
50d8b493e4 when creating an ahdemo bss use any requested bssid; otherwise use zero
Obtained from:	madwifi
2005-12-14 01:16:22 +00:00
Sam Leffler
1fd2349de8 propagate current bss state on sta join so, in particular, authmode
is set properly in the new bss node

MFC after:	2 weeks
2005-12-12 18:44:27 +00:00
Sam Leffler
1b49e12042 Bandaid ieee80211_set_chan to handle a channel parameter of "any";
this can happen under certain conditions when scanning.  This logic
will eventually go away with the new scanning code.

While here de-inline the routine.

MFC after:	1 week
2005-12-12 18:42:20 +00:00
Sam Leffler
be425a0f40 Adhoc mode fixups:
o plug memory leak in adhoc mode: on rx the sender may be the
  current master so simply checking against ic_bss is not enough
  to identify if the packet comes from an unknown sender; must
  also check the mac address
o split neighbor node creation into two routines and fillin state
  of nodes faked up on xmit when a beacon or probe response frame
  is later received; this ensures important state like the rate set
  and advertised capabilities are correct

Obtained from:	netbsd
MFC after:	1 week
2005-12-04 04:50:27 +00:00
Sam Leffler
5ff8092143 revert 1.64: we cannot use the channel characteristics to decide when to
do 11g erp sta accounting because b/g channels show up as false positives
when operating in 11b.

Noticed by:	Michal Mertl
2005-08-13 17:50:21 +00:00
Sam Leffler
efefac4077 Don't use ic_curmode to decide when to do 11g station accounting,
use the station channel properties.  Fixes assert failure/bogus
operation when an ap is operating in 11a and has associated stations
then switches to 11g.

Noticed by:	Michal Mertl
Reviewed by:	avatar
MFC after:	2 weeks
2005-08-10 17:42:13 +00:00
Sam Leffler
b5c9941514 Clarify/fix handling of the current channel:
o add ic_curchan and use it uniformly for specifying the current
  channel instead of overloading ic->ic_bss->ni_chan (or in some
  drivers ic_ibss_chan)
o add ieee80211_scanparams structure to encapsulate scanning-related
  state captured for rx frames
o move rx beacon+probe response frame handling into separate routines
o change beacon+probe response handling to treat the scan table
  more like a scan cache--look for an existing entry before adding
  a new one; this combined with ic_curchan use corrects handling of
  stations that were previously found at a different channel
o move adhoc neighbor discovery by beacon+probe response frames to
  a new ieee80211_add_neighbor routine

Reviewed by:	avatar
Tested by:	avatar, Michal Mertl
MFC after:	2 weeks
2005-08-10 16:22:30 +00:00
Sam Leffler
c1225b52f6 Split crypto tx+rx key indices and add a key index -> node mapping table:
Crypto changes:
o change driver/net80211 key_alloc api to return tx+rx key indices; a
  driver can leave the rx key index set to IEEE80211_KEYIX_NONE or set
  it to be the same as the tx key index (the former disables use of
  the key index in building the keyix->node mapping table and is the
  default setup for naive drivers by null_key_alloc)
o add cs_max_keyid to crypto state to specify the max h/w key index a
  driver will return; this is used to allocate the key index mapping
  table and to bounds check table loookups
o while here introduce ieee80211_keyix (finally) for the type of a h/w
  key index
o change crypto notifiers for rx failures to pass the rx key index up
  as appropriate (michael failure, replay, etc.)

Node table changes:
o optionally allocate a h/w key index to node mapping table for the
  station table using the max key index setting supplied by drivers
  (note the scan table does not get a map)
o defer node table allocation to lateattach so the driver has a chance
  to set the max key id to size the key index map
o while here also defer the aid bitmap allocation
o add new ieee80211_find_rxnode_withkey api to find a sta/node entry
  on frame receive with an optional h/w key index to use in checking
  mapping table; also updates the map if it does a hash lookup and the
  found node has a rx key index set in the unicast key; note this work
  is separated from the old ieee80211_find_rxnode call so drivers do
  not need to be aware of the new mechanism
o move some node table manipulation under the node table lock to close
  a race on node delete
o add ieee80211_node_delucastkey to do the dirty work of deleting
  unicast key state for a node (deletes any key and handles key map
  references)

Ath driver:
o nuke private sc_keyixmap mechansim in favor of net80211 support
o update key alloc api

These changes close several race conditions for the ath driver operating
in ap mode.  Other drivers should see no change.  Station mode operation
for ath no longer uses the key index map but performance tests show no
noticeable change and this will be fixed when the scan table is eliminated
with the new scanning support.

Tested by:	Michal Mertl, avatar, others
Reviewed by:	avatar, others
MFC after:	2 weeks
2005-08-08 18:46:36 +00:00
Sam Leffler
d365f9c760 Cleanup beacon/listen interval handling:
o separate configured beacon interval from listen interval; this
  avoids potential use of one value for the other (e.g. setting
  powersavesleep to 0 clobbers the beacon interval used in hostap
  or ibss mode)
o bounds check the beacon interval received in probe response and
  beacon frames and drop frames with bogus settings; not clear
  if we should instead clamp the value as any alteration would
  result in mismatched sta+ap configuration and probably be more
  confusing (don't want to log to the console but perhaps ok with
  rate limiting)
o while here up max beacon interval to reflect WiFi standard

Noticed by:	Martin <nakal@nurfuerspam.de>
MFC after:	1 week
2005-08-08 03:30:57 +00:00
Sam Leffler
97c973adc4 Fix handling of frames sent prior to a station being authorized
when operating in ap mode.  Previously we allocated a node from the
station table, sent the frame (using the node), then released the
reference that "held the frame in the table".  But while the frame
was in flight the node might be reclaimed which could lead to
problems.  The solution is to add an ieee80211_tmp_node routine
that crafts a node that does exist in a table and so isn't ever
reclaimed; it exists only so long as the associated frame is in flight.

MFC after:	5 days
2005-08-06 04:56:49 +00:00
Sam Leffler
19ad2dd79a close a race between reclaiming a node when a station is inactive
and sending the null data frame used to probe inactive stations

MFC after:	5 days
2005-07-31 06:12:32 +00:00
Sam Leffler
936f15d221 bandaid ni_fails handling so ap's with association failures are
reconsidered after a bit; a proper fix involves more changes to
the scanning infrastructure

Reviewed by:	avatar, David Young
MFC after:	5 days
2005-07-27 02:53:09 +00:00
Sam Leffler
44b666cd0e the AREF flag is only meaningful in ap mode; adhoc neighbors now
are timed out of the sta/neighbor table
2005-07-23 00:16:46 +00:00
Sam Leffler
f66d97f6bc o move inactivity-related debug msgs under IEEE80211_MSG_INACT
o probe inactive neighbors in adhoc mode (they don't have an
  association id so previously were being timed out)

MFC after:	3 days
2005-07-22 23:25:46 +00:00
Sam Leffler
af8418dcb1 split xmit of probe request frame out into a separate routine that
takes explicit parameters; this will be needed when scanning is
decoupled from the state machine to do bg scanning

MFC after:	3 days
2005-07-22 21:11:26 +00:00
Sam Leffler
e996233220 simplify ic_newassoc callback
MFC after:	3 days
2005-07-22 17:57:16 +00:00
Sam Leffler
641b4d0b2d simplify ieee80211_ibss_merge api
MFC after:	3 days
2005-07-22 17:54:40 +00:00
Sam Leffler
edfa57d0f0 simplify tim callback api
MFC after:	3 days
2005-07-22 17:45:48 +00:00
Sam Leffler
e4918ecdb9 simplify ieee80211_node_authorize and ieee80211_node_unauthorize api's
MFC after:	3 days
2005-07-22 17:36:12 +00:00
Sam Leffler
f62121ce8e simplifiy ieee80211_send_nulldata api
MFC after:	3 days
2005-07-22 17:31:18 +00:00
Sam Leffler
7d77cd5381 simplify rate set api's by removing ic parameter (implicit in node reference)
MFC after:	3 days
2005-07-22 17:29:03 +00:00
Sam Leffler
ebdda46c84 Fix race condition in handling node reference counts for authenticating
stations in ap mode.  Track when a node's first auth frame is
received and use this to decide whether or not to bump the refcnt.
This insures we only ever bump the refcnt once.

Reviewed by:	avatar
Approved by:	re (scottl)
2005-07-06 01:51:44 +00:00
Sam Leffler
7268fa6483 move AID implementation defines from the protocol definitions to
where they are used
2005-06-10 04:42:34 +00:00
Sam Leffler
f02a0bd2ac Change the MLME ASSOCIATE ioctl to accept either a ssid, a bssid,
or a bssid+ssid. This is needed for later versions of wpa_supplicant
and for forthcoming addons to wpa_supplicant.

Note this is an api change and applications must be rebuilt.
2005-06-07 23:37:49 +00:00
Sam Leffler
6edf09a6e9 avoid potential array index by -1
Noticed by:	Coverity Prevent analysis tool
2005-03-16 20:40:48 +00:00
Sam Leffler
48b0a5be74 honor any desired bssid when creating an ibss
Prodded by:	David Young
Obtained from:	netbsd
2005-03-08 17:04:14 +00:00
Sam Leffler
f9cd9174fa propagate state kept in the bss node when re-creating the node
on state transitions; this is a stopgap measure, need to rethink
how we do management of this state

Identified by:	Divy Le Ray
2005-02-10 16:59:04 +00:00
Sam Leffler
49a152366e update node reference count debug msgs to include the node address
since the mac address may not be sufficient to uniquely identify a node
2005-01-24 20:50:20 +00:00
Sam Leffler
acc4f7f50c statically allocate the station/neighbor node table; the deferred
allocation scheme introduced a race condition during device state
transitions
2005-01-24 19:32:10 +00:00
Sam Leffler
44acc00dda when a station is timed out for inactivity, remove it from the table
so it isn't considered again
2005-01-20 02:59:21 +00:00
Sam Leffler
ce64703289 explicitly avoid timing out ourself due to inactivity; it
can easily happen if the bss is quiet
2005-01-20 02:54:18 +00:00
Sam Leffler
90d0d0366b fix refcnt leak in adhoc mode: entries in the neighbor table
created due to rx'd frames had an extra reference
2005-01-20 02:53:11 +00:00
Sam Leffler
a84679cd18 remove debug msg from ieee80211_iterate_nodes; it makes logs very noisy
as onoe rate control invokes this once a second
2005-01-18 20:35:39 +00:00
Sam Leffler
29d368a780 avoid possible null pointer deref when refcnt debugging is enabled; the
node may be orphaned

Submitted by:	Tai-hwa Liang
2005-01-18 20:34:22 +00:00
Sam Leffler
96acc1b61c Explicitly ignore ibss merge requests when the node is ic_bss. This can
happen on the first management frame received from a neighbor; we assume
any merge candidate will send more frames and those should be processed
with a suitable table entry.

Stepped on by:	Tai-hwa Liang
2005-01-18 20:30:16 +00:00
Sam Leffler
3fcfbbfa76 Simplify the logic for checking the scan candidates at the end of a scan.
Hold a lock on the table instead of futzing with reference counts which
was potentially dangerous except drivers were quiescent while we did this
so the table contents never changed.  Disable the hack logic for removing
scan candidates with multiple association failures; it's never done the
right thing and will be fixed correctly with background scanning goes in.
2005-01-18 20:21:29 +00:00
Sam Leffler
c75ac46947 when scanning is interrupted reset state so table entries go in the station
table and not the scan table

Noticed by:	Tai-hwa Liang
2005-01-18 19:59:40 +00:00
Sam Leffler
98ff62638d do fixed rate check when considering if a scan candidate is suitable so when
it's time to join the bss we can't get an error
2005-01-18 19:52:36 +00:00
Sam Leffler
ef92bcdc97 Correct scan candidate selection logic for dual-band devices: prefer
candidate on 5Ghz channel to candidate on 2Ghz channel only when the
rssi are comparable (wasn't considering rssi).
2005-01-01 17:48:27 +00:00
Sam Leffler
1f1d781074 bump copyright for 2005 2004-12-31 22:42:38 +00:00