Commit Graph

28 Commits

Author SHA1 Message Date
Andriy Voskoboinyk
1c4cb65153 net80211(4): do not setup Tx parameters for unsupported modes.
That should shorten 'ifconfig <wlan> list txparam' output since
unsupported modes will not be shown.

Checked with RTL8188EE, STA mode.

MFC after:	2 weeks
2019-02-03 04:31:50 +00:00
Pedro F. Giffuni
fe267a5590 sys: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:23:17 +00:00
Adrian Chadd
930dc01620 [net80211] Add default parameters for 11ac.
I doubt TDMA code will ever work for 11ac, but you never know, someone
may one day make it happen.
2017-01-10 07:24:29 +00:00
Andriy Voskoboinyk
7db788c66f net80211: switch from ieee80211_iterate_nodes() to
ieee80211_iterate_nodes_vap() where possible; this should
make the code a bit cleaner.
2016-11-14 23:51:28 +00:00
Andriy Voskoboinyk
4357a5d1ef net80211: hide subtype mask & shift in function call.
Hide subtype mask/shift (which is used for index calculation
in ieee80211_mgt_subtype_name[] array) in function call.

Tested with RTL8188CUS, STA mode.

Reviewed by:	adrian
Differential Revision:	https://reviews.freebsd.org/D5369
2016-04-20 21:15:55 +00:00
Adrian Chadd
b9b533891f Convert malloc/free back to #define's, as part of OS portability work.
DragonflyBSD uses the FreeBSD wireless stack and drivers.  Their malloc()
API is named differently, so they don't have userland/kernel symbol
clashes like we do (think libuinet.)

So, to make it easier for them and to port to other BSDs/other operating
systems, start hiding the malloc specific bits behind defines in
ieee80211_freebsd.h.

DragonflyBSD can now put these portability defines in their local
ieee80211_dragonflybsd.h.

This should be a great big no-op for everyone running wifi.

TODO:

* kill M_WAITOK - some platforms just don't want you to use it
* .. and/or handle it returning NULL rather than waiting forever.
* MALLOC_DEFINE() ?
* Migrate the well-known malloc names (eg M_TEMP) to net80211
  namespace defines.
2015-05-25 19:18:16 +00:00
Adrian Chadd
c79f192c09 Begin plumbing ieee80211_rx_stats through the receive path.
Smart NICs with firmware (eg wpi, iwn, the new atheros parts, the intel 7260
series, etc) support doing a lot of things in firmware.  This includes but
isn't limited to things like scanning, sending probe requests and receiving
probe responses.  However, net80211 doesn't know about any of this - it still
drives the whole scan/probe infrastructure itself.

In order to move towards suppoting smart NICs, the receive path needs to
know about the channel/details for each received packet.  In at least
the iwn and 7260 firmware (and I believe wpi, but I haven't tried it yet)
it will do the scanning, power-save and off-channel buffering for you -
all you need to do is handle receiving beacons and probe responses on
channels that aren't what you're currently on.  However the whole receive
path is peppered with ic->ic_curchan and manual scan/powersave handling.
The beacon parsing code also checks ic->ic_curchan to determine if the
received beacon is on the correct channel or not.[1]

So:

* add freq/ieee values to ieee80211_rx_stats;
* change ieee80211_parse_beacon() to accept the 'current' channel
  as an argument;
* modify the iv_input() and iv_recv_mgmt() methods to include the rx_stats;
* add a new method - ieee80211_lookup_channel_rxstats() - that looks up
  a channel based on the contents of ieee80211_rx_stats;
* if it exists, use it in the mgmt path to switch the current channel
  (which still defaults to ic->ic_curchan) over to something determined
  by rx_stats.

This is enough to kick-start scan offload support in the Intel 7260
driver that Rui/I are working on.  It also is a good start for scan
offload support for a handful of existing NICs (wpi, iwn, some USB
parts) and it'll very likely dramatically improve stability/performance
there.  It's not the whole thing - notably, we don't need to do powersave,
we should not scan all channels, and we should leave probe request sending
to the firmware and not do it ourselves.  But, this allows for continued
development on the above features whilst actually having a somewhat
working NIC.

TODO:

* Finish tidying up how the net80211 input path works.
  Right now ieee80211_input / ieee80211_input_all act as the top-level
  that everything feeds into; it should change so the MIMO input routines
  are those and the legacy routines are phased out.

* The band selection should be done by the driver, not by the net80211
  layer.

* ieee80211_lookup_channel_rxstats() only determines 11b or 11g channels
  for now - this is enough for scanning, but not 100% true in all cases.
  If we ever need to handle off-channel scan support for things like
  static-40MHz or static-80MHz, or turbo-G, or half/quarter rates,
  then we should extend this.

[1] This is a side effect of frequency-hopping and CCK modes - you
    can receive beacons when you think you're on a different channel.
    In particular, CCK (which is used by the low 11b rates, eg beacons!)
    is decodable from adjacent channels - just at a low SNR.
    FH is a side effect of having the hardware/firmware do the frequency
    hopping - it may pick up beacons transmitted from other FH networks
    that are in a different phase of hopping frequencies.
2015-05-25 16:37:41 +00:00
Adrian Chadd
bfd3bbdb11 Don't return ENOTSUPP here - the net80211 pluggable ioctl API will treat
this as the final item in the linker set and not try others.

This stopped the fast frames IOCTLs from being called.
2013-08-18 23:40:30 +00:00
Adrian Chadd
4aecc339cf Fix the situation where net80211 is built with IEEE80211_SUPPORT_TDMA but a module
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.
2012-01-15 19:45:23 +00:00
Adrian Chadd
eb29e5f70d Fix an unused variable warning/error when invariants isn't enabled.
Reported by:	bz
2011-10-12 10:19:55 +00:00
Adrian Chadd
23401900d3 Fix a panic in the wifi stack when a software beacon miss occurs in the wrong state.
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
2011-10-02 02:42:31 +00:00
Weongyo Jeong
7e62e45f53 fixes a broken software beacon miss handler. There is a race to check
vap->iv_bmiss_count == 0 in ieee80211_swbmiss because iv_swbmiss_task is
enqueued by taskqueue.

Reviewed by:	rpaulo
2010-03-14 01:57:32 +00:00
Sam Leffler
39c3faaf70 o assert TDMA_MAXSLOTS is 2 so noone tries to blindly increase it
o add safety belt in vdetach for failed state block allocation
o fix dynamic change to tdma config; ERESTART may not result in
  kicking the state machine so we need to explicitly mark the
  beacon for update

Sponsored by:
2009-05-30 19:57:31 +00:00
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
5434ed5af3 setup turboA/G fixed rate parameters too; this is needed, in particular,
for turboG operation
2009-04-13 20:53:12 +00:00
Sam Leffler
baa55e71d4 correct debug printf 2009-04-13 20:50:51 +00:00
Sam Leffler
4477b68344 check correct address for a bssid mtch 2009-04-13 20:50:07 +00:00
Sam Leffler
9d90db9307 o move tdma+superg protocol defs out of public view
o add #ifdef _KERNEL to superg+tdma include files so they can be used
  by user code to get the protocol defs
2009-03-26 21:29:03 +00:00
Sam Leffler
8c4e758a8b add linker sets for get/set ioctl handlers so optional net80211
code is isolated
2009-03-24 17:57:48 +00:00
Sam Leffler
fffcc698c7 use IEEE80211_SUPPORT_TDMA option to control whether code is
configured; this allows us to remove an #ifdef
2009-03-24 17:22:10 +00:00
Sam Leffler
f9b5a72f15 rate limit printfs for invalid tdma ie contents; probably want this to
be less than 1/sec
2009-03-18 19:38:39 +00:00
Sam Leffler
2bc3ce7732 Minor cleanups of tdma protocol handling:
o break out version-related code to simplify rev'ing the protocol
o add parameter validation macros so checks that appear multiple places
  are consistent (and easy to change)
o add protocol version check when looking for a scan candidate
o improve scan debug output format
o rewrite beacon update handling to calculate a bitmask of changed values
  and pass that down through the driver callback so drivers can optimize work
o do slot bounds check before use when parsing received beacons
2009-03-18 19:28:17 +00:00
Sam Leffler
cc3e9fe79c change tdma slave behaviour: if the channel is locked don't do bmiss handling
(so no scanning/roaming)

Reviewed by:	Chris Anderson
2009-02-22 18:48:54 +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
577a7bcce8 remove bogus reference reclaim on the slave-side bss node on beacon miss 2009-02-11 17:30:36 +00:00
Sam Leffler
60d5654464 when operating as a slave, clear neighbor entries and the peer bss node
on beacon miss

while here, remove a stray pointless write of iv_bmiss_count
2009-02-10 23:52:28 +00:00
Sam Leffler
800e5ab76a setup default fixed rates for static turbo and 11n;
the 11n rates are pure guess
2009-01-29 23:12:06 +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