Commit Graph

40 Commits

Author SHA1 Message Date
Bernhard Schmidt
fcd9500f91 Fix some net80211 enum nits:
- ic_vap_create() uses an ieee80211_opmode argument
- ieee80211_rate2media() takes an ieee80211_phymode argument
- ieee80211_plcp2rate() takes an ieee80211_phytype argument
- cast to enum ieee80211_protmode and ieee80211_roamingmode to silence
  compiler warnings

Submitted by:	arundel@
2011-12-17 10:23:17 +00:00
Bernhard Schmidt
139127ce5e Don't hardcode assumptions about basic rates, similar to what the rt2661
support code does. While here remove an unnecessary loop.
2011-04-09 14:45:50 +00:00
Bernhard Schmidt
bd56e71b4b Pull ieee80211_ratectl_node_init() calls from drivers into net80211.
This fixes hostap mode for at least ral(4) and run(4), because there is
no sufficient call into drivers which could be used initialize the node
related ratectl variables.

MFC after:	3 days
2011-01-17 20:15:15 +00:00
Bernhard Schmidt
a7c6aabdc3 Instead of using the AMRR ratectl algo as default for drivers which have
the IEEE80211_C_RATECTL flag set, default to NONE for all drivers. Only if
a driver calls ieee80211_ratectl_init() check if the NONE algo is still
selected and try to use AMRR in that case. Drivers are still free to use
any other algo by calling ieee80211_ratectl_set() prior to the
ieee80211_ratectl_init() call.

After this change it is now safe to assume that a ratectl algo is always
available and selected, which renders the IEEE80211_C_RATECTL flag pretty
much useless. Therefore revert r211314 and 211546.

Reviewed by:	rpaulo
MFC after:	2 weeks
2010-11-06 18:17:20 +00:00
Bernhard Schmidt
ad8e331bf2 Introduce IEEE80211_C_RATECTL, drivers which use the ratectl framework
should set this capability.

MFC after:	2 weeks
2010-08-14 20:12:10 +00:00
Maxim Sobolev
e50d35e6c6 Add new tunable 'net.link.ifqmaxlen' to set default send interface
queue length. The default value for this parameter is 50, which is
quite low for many of today's uses and the only way to modify this
parameter right now is to edit if_var.h file. Also add read-only
sysctl with the same name, so that it's possible to retrieve the
current value.

MFC after:	1 month
2010-05-03 07:32:50 +00:00
Rui Paulo
e313b3e882 Avoid NULL deref.
Submitted by:	gavin
MFC after:	1 month
2010-04-07 17:51:06 +00:00
Rui Paulo
b6108616ac net80211 rate control framework (net80211 ratectl).
This framework allows drivers to abstract the rate control algorithm and
just feed the framework with the usable parameters. The rate control
framework will now deal with passing the parameters to the selected
algorithm. Right now we have AMRR (the default) and RSSADAPT but there's
no way to select one with ifconfig, yet.
The objective is to have more rate control algorithms in the net80211
stack so all drivers[0] can use it. Ideally, we'll have the well-known
sample rate control algorithm in the net80211 at some point so all
drivers can use it (not just ath).

[0] all drivers that do rate control in software, that is.

Reviewed by:	bschmidt, thompsa, weyongo
MFC after:	1 months
2010-04-07 15:29:13 +00:00
Rui Paulo
59aa14a91d Implementation of the upcoming Wireless Mesh standard, 802.11s, on the
net80211 wireless stack. This work is based on the March 2009 D3.0 draft
standard. This standard is expected to become final next year.
This includes two main net80211 modules, ieee80211_mesh.c
which deals with peer link management, link metric calculation,
routing table control and mesh configuration and ieee80211_hwmp.c
which deals with the actually routing process on the mesh network.
HWMP is the mandatory routing protocol on by the mesh standard, but
others, such as RA-OLSR, can be implemented.

Authentication and encryption are not implemented.

There are several scripts under tools/tools/net80211/scripts that can be
used to test different mesh network topologies and they also teach you
how to setup a mesh vap (for the impatient: ifconfig wlan0 create
wlandev ... wlanmode mesh).

A new build option is available: IEEE80211_SUPPORT_MESH and it's enabled
by default on GENERIC kernels for i386, amd64, sparc64 and pc98.

Drivers that support mesh networks right now are: ath, ral and mwl.

More information at: http://wiki.freebsd.org/WifiMesh

Please note that this work is experimental. Also, please note that
bridging a mesh vap with another network interface is not yet supported.

Many thanks to the FreeBSD Foundation for sponsoring this project and to
Sam Leffler for his support.
Also, I would like to thank Gateworks Corporation for sending me a
Cambria board which was used during the development of this project.

Reviewed by:	sam
Approved by:	re (kensmith)
Obtained from:	projects/mesh11s
2009-07-11 15:02:45 +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
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
29aca94080 Eliminate ic_myaddr so changing the mac address of a device works correctly:
o remove ic_myaddr from ieee80211com
o change ieee80211_ifattach to take the mac address of the physical device
  and use that to setup the lladdr.
o replace all references to ic_myaddr in drivers by IF_LLADDR
o related cleanups (e.g. kill dead code)

PR:		kern/133178
Reviewed by:	thompsa, rpaulo
2009-03-29 17:59:14 +00:00
Sam Leffler
e66b0905fc o use the new association callback to notify the driver when joining a bss
in sta and adhoc modes; this should've been done forever ago as most all
  drivers use this hook to set per-station transmit parameters such as for
  tx rate control
o adjust drivers to remove explicit calls to the driver newassoc method
2008-10-27 16:46:50 +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
8215d906ff Update PLCP<->rate mapping support:
o correct mapping of CCK rates to PLCP; was using nonstandard Ralink
  values which just happened to also be used by Zydas (so went unnoticed)
o change ieee80211_plcp2rate api to take a phy type instead of a flag
  that indicates ofdm/!ofdm
o update drivers to match (restore per-driver code to map rate->PLCP)

Reviewed by:	sephe, weongyo, thompsa
2008-05-12 00:32:52 +00:00
Sam Leffler
c43feede8b Minor cleanup of vap create work:
o add IEEE80211_C_STA capability to indicate sta mode is supported
  (was previously assumed) and mark drivers as capable
o add ieee80211_opcap array to map an opmode to the equivalent capability bit
o move IEEE80211_C_OPMODE definition to where capabilities are defined so it's
  clear it should be kept in sync (on future additions)
o check device capabilities in clone create before trying to create a vap;
  this makes driver checks unneeded
o make error codes return on failed clone request unique
o temporarily add console printfs on clone request failures to aid in
  debugging; these will move under DIAGNOSTIC or similar before release
2008-05-12 00:15:30 +00:00
Sam Leffler
6c5c43974e fix typo's that broke duration calculation on protection frames 2008-05-11 22:11:01 +00:00
Andrew Thompson
77197f9ce4 Only start the vaps if the init routine completed. 2008-05-10 20:25:59 +00:00
Andrew Thompson
31a8c1edd8 Unify all the wifi *_ioctl routines
- Limit grabbing the lock to SIOCSIFFLAGS.
 - Move ieee80211_start_all() to SIOCSIFFLAGS.
 - Remove SIOCSIFMEDIA as it is not useful.
 - Limit ether_ioctl to only SIOCGIFADDR. SIOCSIFADDR and SIOCSIFMTU have no
   affect as there is no input/output path in the vap parent.  The vap code
   will handle the reinit of the mac address changes.
 - Split off ndis_ioctl_80211 as it was getting too different to wired devices.

This fixes a copyout while locked and a lock recursion.

Reviewed by:		sam
2008-05-01 04:55:00 +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
c5876e1889 fix locking botch
MFC after:	1 week
2008-04-09 18:40:10 +00:00
Kevin Lo
02f0a39fed Check wep flag in *_tx_mgt since we need to encrypt some management frame
in case of shared authentification.

Obtained from: NetBSD
2007-11-06 07:30:12 +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
2b9411e29f Add missing bits that made bg scanning lame:
o update ic_lastdata to reflect time of last outbound frame
o outbound traffic must preempt/cancel bg scanning to avoid delays

This stuff was somehow missed in the initial import.

Reviewed by:	thompsa, avatar, sephe (earlier version)
Approved by:	re (blanket wireless)
2007-09-05 23:00:27 +00:00
Sam Leffler
14fb6b8fe2 o add 802.11 state machine states for DFS and client-side power save
o fixup drivers to ignore new states

Reviewed by:	avatar (?)
Approved by:	re (blanket wireless)
2007-09-05 21:31:32 +00:00
Kevin Lo
36ffd4ba6d Use bus_get_dma_tag() to obtain the parent DMA tag.
Reviewed by: sam, sephe, thompsa
Approved by: re (kensmith)
2007-07-22 06:44:10 +00:00
Kevin Lo
56083486d5 Don't use 64-byte header on each packet in radiotap.
Reviewed by: sam
Approved by: re(bmah)
2007-06-29 02:43:13 +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
fa393cd523 allow net80211 to fillin rate sets
MFC after:	2 weeks
2007-03-11 22:43:35 +00:00
Bruce M Simpson
8f435158a3 Remove dependency on deprecated if_watchdog ABI.
Tested with a Sitecom RT2661 based card.
2006-12-19 17:37:41 +00:00
Kevin Lo
f910c56c11 Add header files <sys/lock.h> and <sys/mutex.h> for mtx_init() and friends.
Approved by: cognet
2006-12-07 15:24:38 +00:00
Max Khon
3da2dc0763 Fix kernel panic in rt2661_tx_intr() if no frames has been sent.
Obtained from:	OpenBSD (sys/dev/ic/rt2661.c rev. 1.15)
2006-06-05 20:06:29 +00:00
Sam Leffler
ff046a6c6b add missed calls to bpf_peers_present 2006-06-02 23:14:40 +00:00
Christian S.J. Peron
16d878cc99 Fix the following bpf(4) race condition which can result in a panic:
(1) bpf peer attaches to interface netif0
	(2) Packet is received by netif0
	(3) ifp->if_bpf pointer is checked and handed off to bpf
	(4) bpf peer detaches from netif0 resulting in ifp->if_bpf being
	    initialized to NULL.
	(5) ifp->if_bpf is dereferenced by bpf machinery
	(6) Kaboom

This race condition likely explains the various different kernel panics
reported around sending SIGINT to tcpdump or dhclient processes. But really
this race can result in kernel panics anywhere you have frequent bpf attach
and detach operations with high packet per second load.

Summary of changes:

- Remove the bpf interface's "driverp" member
- When we attach bpf interfaces, we now set the ifp->if_bpf member to the
  bpf interface structure. Once this is done, ifp->if_bpf should never be
  NULL. [1]
- Introduce bpf_peers_present function, an inline operation which will do
  a lockless read bpf peer list associated with the interface. It should
  be noted that the bpf code will pickup the bpf_interface lock before adding
  or removing bpf peers. This should serialize the access to the bpf descriptor
  list, removing the race.
- Expose the bpf_if structure in bpf.h so that the bpf_peers_present function
  can use it. This also removes the struct bpf_if; hack that was there.
- Adjust all consumers of the raw if_bpf structure to use bpf_peers_present

Now what happens is:

	(1) Packet is received by netif0
	(2) Check to see if bpf descriptor list is empty
	(3) Pickup the bpf interface lock
	(4) Hand packet off to process

From the attach/detach side:

	(1) Pickup the bpf interface lock
	(2) Add/remove from bpf descriptor list

Now that we are storing the bpf interface structure with the ifnet, there is
is no need to walk the bpf interface list to locate the correct bpf interface.
We now simply look up the interface, and initialize the pointer. This has a
nice side effect of changing a bpf interface attach operation from O(N) (where
N is the number of bpf interfaces), to O(1).

[1] From now on, we can no longer check ifp->if_bpf to tell us whether or
    not we have any bpf peers that might be interested in receiving packets.

In collaboration with:	sam@
MFC after:	1 month
2006-06-02 19:59:33 +00:00
Poul-Henning Kamp
c40da00ca3 Since DELAY() was moved, most <machine/clock.h> #includes have been
unnecessary.
2006-05-16 14:37:58 +00:00
Damien Bergamini
d0934eb173 o fixes the locking of if_init().
o don't send management frames if the IFF_DRV_RUNNING flag is not set.
  this prevents the timeout watchdog from being potentially re-armed
  when the interface is brought down.

fixes a crash that occurs with RT2661 based adapters.
reported by Arnaud Lacombe.
2006-03-21 21:15:43 +00:00
Damien Bergamini
a6991cc704 Disable 802.11e support for now. Did some cleanup while I'm here. 2006-03-07 20:48:23 +00:00
Mike Silbersack
2017e1cbae Fix include paths to make this compile. 2006-03-05 23:27:51 +00:00
Damien Bergamini
9c6307b145 Add support for the second (RT2561/RT2561S) and third (RT2661 MIMO XR)
generations of 802.11abg chipsets from Ralink Technology.
Get rid of the pccard front-end while I'm here since all adapters are
cardbus ones.

Obtained from:	OpenBSD
2006-03-05 20:36:56 +00:00