Commit Graph

98 Commits

Author SHA1 Message Date
adrian
00f15827a5 Mark the taskqueue as the _net80211_ taskqueue.
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".)
2012-01-22 05:30:29 +00:00
bschmidt
49344f6037 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
bschmidt
865ccb7c05 While determining the maxrate for ieee80211_media_setup() honor
the device capabilities.
2011-03-13 11:47:43 +00:00
bschmidt
41875be2d5 First step on removing the harcoded RX/TX stream and MCS0-15 assumptions.
Initialize ic_rxstream/ic_txstream with 2, for compatibility reasons.
Introduce 4 new HTC flags, which are used in addition to ic_rxstream
and ic_txstream to compute the hc_mcsset content and also for initializing
ni_htrates. The number of spatial streams is enough to determine support
for MCS0-31 but not for MCS32-76 as well as some TX parameters in the
hc_mcsset field.
2011-03-13 11:40:18 +00:00
bschmidt
3d57f75785 Complete the MCS rate table based on the final 802.11n std. While here
adjust the IEEE80211_HTRATE_MAXSIZE constant, only MCS0 - 76 are valid
the other bits in the mcsset IE (77 - 127) are either reserved or used
for TX parameters.
2011-03-10 18:17:24 +00:00
bschmidt
5fd0b74a4c 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
bschmidt
267bcceb3d 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
sobomax
213eac1f2c 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
rpaulo
69bf804b50 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
rpaulo
417d4c8dbb Add a new field for extended HT capabilities.
Submitted by:	Alexander Egorenkov <egorenar at gmail.com>
MFC after:	2 weeks
Sponsored by:	iXsystems, inc.
2010-03-23 12:03:09 +00:00
thompsa
e3e987d4d1 Use the iflladdr_event event to keep the mac address on the vap in sync with
the parent wirless interface. If the user passed in a mac address or it was
autogenerated then flag this to avoid trashing it on update.

This will fix wlan+lagg in a post vap world.
2010-01-19 05:00:57 +00:00
jhb
892fe839c4 Take a step towards removing if_watchdog/if_timer. Don't explicitly set
if_watchdog/if_timer to NULL/0 when initializing an ifnet.  if_alloc()
sets those members to NULL/0 already.
2009-11-06 14:55:01 +00:00
sam
3fb9b6abab Drain link state event changes posted during vap destroy. This is a
band-aid for the general problem that if_link_state_change can be
called between if_detach and if_free leaving a task queued that has
been free'd.

Spotted by:	thompsa
Reviewed by:	rwatson
Approved by:	re (rwatson)
2009-08-12 21:19:19 +00:00
sam
66463b10cc Filter setting IFF_PROMISC on tdma vaps; we don't want the underyling device
to be in promiscuous mode as we have a h/w bssid.

Approved by:	re (kib)
2009-07-31 19:12:19 +00:00
sam
671d3b45e2 correct handling of IFF_PROMISC; this should not be pushed to the parent
device except for monitor and ahdemo mode vaps

Reviewed by:	rpaulo
Approved by:	re (kensmith)
2009-07-24 15:28:29 +00:00
sam
a2c9681cf8 monitor mode vaps are meant to be read-only so they can operate on any
frequency w/o regulatory issues, do this by hooking if_transmit and
if_output with routines that discard all transmits

Reviewed by:	thompsa, cbzimmer (intent)
Approved by:	re (kensmith)
2009-07-24 15:27:02 +00:00
rpaulo
8424d74020 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
9f7eae50be Add ieee80211_ageq; a facility for staging packets that require
long-term work before they can be serviced.  Packets are tagged and
assigned an age (in seconds) at the point they are added to the
queue.  If a packet is not retrieved before it's age expires it is
reclaimed.  Tagging can take two forms: a reference to an ieee80211_node
(as happens in the tx path) or an opaque token in cases where there
is no reference or the node structure is not stable (i.e. it's going
to be destroyed).

o add ic_stageq to replace the per-node wds staging queue used for
  dynamic wds
o add ieee80211_mac_hash for building ageq tokens; this computes a
  32-bit hash from an 802.11 mac address (copied from the bridge)
o while here fix a stray ';' noticed in IEEE80211_PSQ_INIT

Reviewed by:	rpaulo
Approved by:	re (kensmith)
2009-07-05 18:17:37 +00:00
rwatson
c9ef486fe1 Modify most routines returning 'struct ifaddr *' to return references
rather than pointers, requiring callers to properly dispose of those
references.  The following routines now return references:

  ifaddr_byindex
  ifa_ifwithaddr
  ifa_ifwithbroadaddr
  ifa_ifwithdstaddr
  ifa_ifwithnet
  ifaof_ifpforaddr
  ifa_ifwithroute
  ifa_ifwithroute_fib
  rt_getifa
  rt_getifa_fib
  IFP_TO_IA
  ip_rtaddr
  in6_ifawithifp
  in6ifa_ifpforlinklocal
  in6ifa_ifpwithaddr
  in6_ifadd
  carp_iamatch6
  ip6_getdstifaddr

Remove unused macro which didn't have required referencing:

  IFP_TO_IA6

This closes many small races in which changes to interface
or address lists while an ifaddr was in use could lead to use of freed
memory (etc).  In a few cases, add missing if_addr_list locking
required to safely acquire references.

Because of a lack of deep copying support, we accept a race in which
an in6_ifaddr pointed to by mbuf tags and extracted with
ip6_getdstifaddr() doesn't hold a reference while in transmit.  Once
we have mbuf tag deep copy support, this can be fixed.

Reviewed by:	bz
Obtained from:	Apple, Inc. (portions)
MFC after:	6 weeks (portions)
2009-06-23 20:19:09 +00:00
sam
a81cc73a1b add missing calls to ieee80211_dfs_attach/detach 2009-06-09 17:11:41 +00:00
sam
33549e3857 iv_flags_ext is full, make room by moving HT-related flags to a new
iv_flags_ht word
2009-06-07 22:00:22 +00:00
sam
6e92f3bfaa partially fix mode setting; this no longer returns an error but still
needs to handle the case where the vap is up+running

Noticed by:	"Paul B. Mahol" <onemda@gmail.com>
2009-06-02 20:00:43 +00:00
sam
9bb9aeed7f move if_detach to the top of ieee80211_ifdetach to close various races
Reviewed by:	jhb
2009-06-02 18:55:27 +00:00
sam
879660c802 Remove hack used to deal with ifnet teardown now that if_detach and the
bridge do a better job.
o move ether_ifdetach to the top of ieee80211_detach
o do not clear if_softc at the top of ieee80211_detach; we no longer need
  this because we are safeguarded against calls coming back through if_ioctl
o simplify the bpf tracker now that we don't null if_softc

This also fixes an issue where having a bpf consumer active when a vap
is destroyed would cause a crash because bpf referenced free'd memory.

Reviewed by:	imp
2009-06-02 16:57:27 +00:00
sam
35d42ca22f Fix monitor mode vaps to work as intended:
o track # bpf taps on monitor mode vaps instead of # monitor mode vaps
o spam monitor mode taps on tx/rx
o fix ieee80211_radiotap_rx_all to dispatch frames only if the vap is up
o while here print radiotap (and superg) state in show com
2009-06-02 00:33:28 +00:00
sam
68f7a1034a 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
thompsa
ed7c3176b9 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
kmacy
24b38efdce Change if_output to take a struct route as its fourth argument in order
to allow passing a cached struct llentry * down to L2

Reviewed by:	rwatson
2009-04-16 20:30:28 +00:00
sam
f7c50ce1e4 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
7edd0aa8ef 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
88b91b235f 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
ac3671600d 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
396490ec3e check ptr against NULL 2009-02-19 04:34:22 +00:00
sam
8f46eec090 instead of special casing lookups for the 11na/g legacy rate set, just
install the rates once when creating the com structure
2009-02-19 04:33:36 +00:00
sam
9705c5de71 remove ic_stats; it was intended to accumulate stats from vaps as they
were reaped but was never used and is inaccessible
2009-02-13 05:31:18 +00:00
thompsa
251dd2ca41 Add a ieee80211_waitfor_parent() function that will wait for all deferred
parent interface tasks to complete. This had been added to the ioctl path but
it is also need elsewhere like detach so its safe to teardown.

Reported by:	Hans Petter Selasky
Submitted by:	sam
2009-02-12 18:57:18 +00:00
sam
a142097876 When crafting a media setting w/ an auto (non-fixed) rate mask out the
turbo option in addition to the mode bits; otherwise if the current
channel is a turbo mode channel we'll form an invalid media setting
and the ifmedia_set operation in vap_attach will panic.

While here use C99-style initialization for an array indexed by mode;
this makes it consistent w/ other usage and avoids breakage if we
should ever change the set of modes.
2009-02-03 22:32:26 +00:00
sam
5fee012a8e setup default rate set for static turbo mode 2009-01-29 23:09:12 +00:00
sam
189648aebe fill in ieee channel #'s and max tx power for drivers that work exclusively
with frequencies; this mimics how ieee80211_setregdomain works
2009-01-27 22:48:46 +00:00
sam
98ad45c3d3 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
dc256886cd Fix definition of IEEE80211_CHAN_MAX; it was defined as 255 but
really was meant to be 256.  Adjust usage accordingly and replace
bogus usage of this value in checking IEEE channel #'s.

NB: this causes an ABI change; ifconfig must be recompiled
2008-12-15 01:26:33 +00:00
sam
d513eda8c8 honor IEEE80211_CLONE_NOBEACONS for type of vap, not just a sta mode vap 2008-10-25 23:43:08 +00:00
sam
f6c797f987 o add support for ifconfig wlanX mode foo
o yank useless code for setting fixed rate through media opts: this
  mechanism didn't scale to HT rates and couldn't handle multiple bands;
  fixed tx rates are set with the IEEE80211_IOC_TXPARAMS ioctl
2008-10-25 23:31:20 +00:00
brooks
3cded34283 Replace a line matching /^ $/ with one matching /^$/.
Obtained from:	//depot/projects/vimage-commit2/...
2008-09-03 20:33:11 +00:00
weongyo
7ec33e687c free ifp allocated at ieee80211_vap_setup.
Reviewed by:	sam, thompsa
2008-09-02 04:49:35 +00:00
sam
24e6f87d1f Revise lock name handling:
o construct a name for the com lock as done for other locks
o pass the device name to IEEE80211_LOCK_INIT so the mtx name
  is constructed as foo_com_lock
o introduce *_LOCK_OBJ macro's to hide the lock contents and
  minimize redundant code
2008-05-28 23:10:53 +00:00
sam
f663b62128 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
7e908fb72f use c99-style initialization for ieee80211_phymode_name 2008-05-11 23:33:56 +00:00
sam
2aec73fe96 add DFS capability bit and use it to auto-enable DFS support 2008-05-11 23:32:07 +00:00
sam
baf49360e8 re-enable WME by default; after a full day of testing on iwi I see no
issues and the only way we'll identify them is for people to use it
2008-05-01 03:49:59 +00:00