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
used for s/w retransmit schemes that want to access this information
w/o the overhead of decoding the raw frame. Note this also allows
drivers to record this information w/o writing the frame when the seq#
is obtained through an out-of-band mechanism (e.g. when a h/w assigned
seq# is reported in a descriptor on tx done notification).
Reviewed by: sephe, avatar
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
to be encapsulated before dispatching to the driver
o eliminate M_WDS now that we call ieee80211_encap directly and can supply
the wds vap to indicate a 4-address frame should be created
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
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
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
When copying big structures, LLVM generates calls to memmove(), because
it may not be able to figure out whether structures overlap. This caused
linker errors to occur. memmove() is now implemented using bcopy().
Ideally it would be the other way around, but that can be solved in the
future. On ARM we don't do add anything, because it already has
memmove().
Discussed on: arch@
Reviewed by: rdivacky
net/route.h.
Remove the hidden include of opt_route.h and net/route.h from net/vnet.h.
We need to make sure that both opt_route.h and net/route.h are included
before net/vnet.h because of the way MRT figures out the number of FIBs
from the kernel option. If we do not, we end up with the default number
of 1 when including net/vnet.h and array sizes are wrong.
This does not change the list of files which depend on opt_route.h
but we can identify them now more easily.
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.
parameters for IEEE80211_IOC_ROAM and IEEE80211_IOC_TXPARAMS; this
lets us add more modes and still have old apps work
o consolidate loops to remote assumptions about mode ordering
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
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
IEEE80211_KEY_DEVKEY
o fix channel power printing (they are signed values)
o add show statab to dump a node table and automatically dump the sta
table of a com structure with /s
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.
channel, only accept a real 11g channel; this fixes a problem where we were
wrongly promoting 11b to a Dynamic Turbo G channel which broke scanning on
channel 6
o max antenna gain
o driver private opaque data
Note this grows the size of a channel to 16 bytes; which makes the
default channel table 4Kbytes (up from 3Kbytes).
o change ioctl's that pass channel lists in/out to handle variable-size
arrays instead of a fixed (compile-time) value; we do this in a way
that maintains binary compatibility
o change ifconfig so all channel list data structures are now allocated
to hold MAXCHAN entries (1536); this, for example, allows the kernel
to return > IEEE80211_CHAN_MAX entries for calls like IEEE80211_IOC_DEVCAPS
the ISO tables, mark them accordingly
o add sku's for handling 900MHz cards
o add opaque struct defs and change []'s to *'s so this file can be
included w/o requiring all of net80211 to be pulled in
o make CTRY_DEBUG and CTRY_DEFAULT public
the vap ioctl. This means that the parent interface should hopefully be up
before we return to userland, it does not depend on the parent init succeeding,
just that it was run.
This fixes wpa_supplicant with ndis and USB where the parent interfaces can be
slow to init.
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
(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
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
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
directly include only the header files needed. This reduces the
unneeded spamming of various headers into lots of files.
For now, this leaves us with very few modules including vnet.h
and thus needing to depend on opt_route.h.
Reviewed by: brooks, gnn, des, zec, imp
Sponsored by: The FreeBSD Foundation
capabilities reported by the ap. These need to be cross-checked
against the local configuration in the vap. Previously we were
only checking the ap capabilities which meant that if an ap reported
it was ff-capable but we were not setup to use them we'd try to do
ff aggregation and drop the frame.
There are a number of problems to be fixed here but applying this
fix immediately as the problem causes all traffic to stop (and has
not workaround).
Reported by: Ashish Shukla
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
(unless explicitly locked to mode 11b) so when we join the bss the
channel attached to the scan cache entry may need to be demoted.
o demote to 11b if the ap is advertising 11b rates
o skip the ap if it's 11b but we're locked to 11g (could consider this
advisory but for now treat it as mandatory)
o handle an odd edge case, if there is a fixed transmit rate for 11g
then the rate check against the 11b ap will fail, try to demote to
11b and retry the rate check
Reviewed by: sephe, thompsa
the net80211 layer has complete control over the handling of mgt frames
(in particular, the ac, tx rate, and retry count); this also allows us
to purge the M_LINK0 flag that was attached to mbufs to mark them as
needing encryption for shared key auth
o change ieee80211_send_setup to take a tid parameter so it can be used
to setup QoS frames
o correct BAR frame construction for AMPDU
o retransmit BAR frames until ACK'd or timeout (use tunables to
control behaviour, default is very aggressive)
o defer seq# update until BAR frame is ACK'd
o add BAR response handling callback for driver to interpose and
push new state to device or push pending aggregates
While here also:
o add backpointer to node in the per-tid tx aggregation data structure
o move ampdu tx state setup/teardown work to separate functions
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
from the vimage project, as per plan established at devsummit 08/08:
http://wiki.freebsd.org/Image/Notes200808DevSummit
Introduce INIT_VNET_*() initializer macros, VNET_FOREACH() iterator
macros, and CURVNET_SET() context setting macros, all currently
resolving to NOPs.
Prepare for virtualization of selected SYSCTL objects by introducing a
family of SYSCTL_V_*() macros, currently resolving to their global
counterparts, i.e. SYSCTL_V_INT() == SYSCTL_INT().
Move selected #defines from sys/sys/vimage.h to newly introduced header
files specific to virtualized subsystems (sys/net/vnet.h,
sys/netinet/vinet.h etc.).
All the changes are verified to have zero functional impact at this
point in time by doing MD5 comparision between pre- and post-change
object files(*).
(*) netipsec/keysock.c did not validate depending on compile time options.
Implemented by: julian, bz, brooks, zec
Reviewed by: julian, bz, brooks, kris, rwatson, ...
Approved by: julian (mentor)
Obtained from: //depot/projects/vimage-commit2/...
X-MFC after: never
Sponsored by: NLnet Foundation, The FreeBSD Foundation
o change ieee80211_parse_htcap and ieee80211_parse_htinfo to save only
internal state obtained from the ie's; no dynamic state such as
ni_chw is altered
o add ieee80211_ht_updateparams to parse ht cap+info ie's and update
dynamic node state
o change ieee80211_ht_node_init to not take an htcap ie that is parsed;
instead have the caller make a separate call as one caller wants to
parse the ie while another wants to parse both cap+info ie's and
update state so can better do this with ieee80211_ht_updateparams
These changes fix sta mode state handling where the node's channel
width was shifted to ht20/ht40 prematurely.
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.
o don't use the key index to identify when the driver has been
asked to allocate a key slot, use an explicit flag; allows
drivers to force s/w fallback for entries in the global table
o change callback api to allocate driver resources for a crypto key:
- de-const the key parameter so drivers can muck with the flags
- on callback failure don't automatically try to setup s/w crypto;
instead the driver must now mark the key entry for s/w crypto and
the caller will re-attach the cipher module
NB: api change permits drivers more control over fallback to s/w
crypto (e.g. based on a limited number of h/w key slots)
For receive:
o explicitly tag rx frames w/ M_AMPDU instead of passing frames through
the reorder processing according to the node having HT and the frame
being QoS data
o relax ieee80211_ampdu_reorder asserts to allow any frame to be passed
in, unsuitable frames are returned to the caller for normal processing;
this permits drivers that cannot inspect the PLCP to mark all data
frames as potential ampdu candidates with only a small penalty
o add M_AMPDU_MPDU to identify frames resubmitted from the reorder q
For transmit:
o tag aggregation candidates with M_AMPDU_MPDU
o fix the QoS ack policy set in ampdu subframes; we only support immediate
BA streams which should be marked for "normal ack" to get implicit block
ack behaviour; interestingly certain vendor parts BA'd frames with the
11e BA ack policy set
o do not assign a sequence # to aggregation candidates; this must be done
when frames are submitted for transmit (NB: this can/will be handled
better when aggregation is pulled up to net80211)
properly; was doing this only on a change in the protection mode
so the advertised protection mode in the beacon would oscillate.
Submitted by: Chris Zimmermann
o use txa_start to form the addba request and purge txa_seqstart
o fill txa_start before calling ic_addba_request to permit drivers
to override when they handle seq# generation (e.g. mwl)
it's unclear if this can happen on freebsd but does appear on netbsd.
Identified by Matthias Drochner who came up with an initial change
that we then revised together.
Reviewed by: thompsa, sephe, avatar
MFC after: 2 weeks
turns out some devices do this and since we otherwise validate the station
is associated and don't use the aid for anything being lenient here allows
them to function
Submitted by: Chris Zimmermann
MFC after: 2 weeks
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
address specified in the ioctl and for drivers that need the address
to locate a key (e.g. for delete).
Note this changes net80211-private api's but not the driver callback;
may want to change that in the future.
Reviewed by: sephe, thompsa
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
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
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
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
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)
while still restricting auto-channel select to only those channels
permitted by regulatory constraints (sorta, we're still missing the
checks to honor radar and noadhoc status on channels). This somehow
got lost in the initial merge of the revised scanning code.
Reviewed by: jhay
MFC after: 2 weeks
sends frames up the stack after changing the current channel then
the lookup by ieee channel number may fail leaving a null ptr in
se_chan; if this happens fallback to the channel recorded when the
frame is processed (curchan). Since the frame doesn't contribute
to scan results for the sta this is acceptable.
Reviewed by: thompsa
MFC after: 3 days
o do not override the home channel recorded for the sta when the frame is
received off-channel; this fixes a problem where we might think the sta
was operating on the channel the frame was received on causing association
requests to be ignored/rejected (likely cause of kern/99036)
o don't include rssi of off-channel frames in the avg rssi used to select
a bss; this gives us a better estimate of the signal we will see for the
station when on-channel
PR: kern/99036
Found by: Yubin Gong
Reviewed by: sephe
MFC after: 1 week
don't do this right; instead go to the scan cache so we pass through
auth state (if the cache is warm we can do this w/o an actual scan)
MFC after: 1 week
