Because the code lacks all the GNU extensions to printf() format stuff,
the compiler doesn't helpfully tell us that I messed up in a previous
commit.
Pointy hat to: adrian, who likely only cares about this because he's the
only one who bothers flipping on net80211 debugging.
Currently, a channel width change updates the 802.11n HT info data in
net80211 but it doesn't trigger any device changes. So the device
driver may decide that HT40 frames can be transmitted but the last
device channel set only had HT20 set.
Now, a task is scheduled so a hardware reset or change isn't done
during any active ongoing RX. It also means that it's serialised
with the other task operations (eg channel change.)
This isn't the final incantation of this work, see below.
For now, any unmodified drivers will simply receive a channel
change log entry. A subsequent patch to ath(4) will introduce
some basic channel change handling (by resetting the NIC.)
Other NICs may need to update their rate control information.
TODO:
* There's still a small window at the present moment where the
channel width has been updated but the task hasn't been fired.
The final version of this should likely pass in a channel width
field to the driver and let the driver atomically do whatever
it needs to before changing the channel.
PR: kern/166286
* Added verify_mesh_*_len functions that verify the length
according to the amendment spec and return number of destination addresses
for allocation of appropriate struct size in memory;
* Modified hwmp_recv_action_meshpath to allocate HWMP ie instead of
storing them on the stack and store all available field according the flags;
* Modify hwmp_add_mesh* to work with all cases of HWMP according to amendment.
* Modify hwmp_send_* to calculate correct len of bytes for the HWMP ie.
* Added new M_80211_MESH_* malloc defines.
* Added macros with magic numbers for HWMP ie sizes according to amendment.
* Added the external address to all HWMP ie structs.
Submitted by: monthadar@gmail.com
* Change in mesh_input to validate that QoS is set and Mesh Control field
is present, also both bytes of the QoS are read;
* Moved defragmentation in mesh_input before we try to forward packet as
inferred from amendment spec, because Mesh Control field only present in first
fragment;
* Changed in ieee80211_encap to set QoS subtype and Mesh Control field present,
only first fragment have Mesh Control field present bit equal to 1;
Submitted by: monthadar@gmail.com
* Moved old categories as specified by D4.0 to be action fields of MESH category
as specified in amendment spec;
* Modified functions to use MESH category and its action fields:
+ ieee80211_send_action_register
+ ieee80211_send_action
+ ieee80211_recv_action_register
+ieee80211_recv_action;
* Modified ieee80211_hwmp_init and hwmp_send_action so they uses correct
action fields as specified in amendment spec;
* Modified ieee80211_parse_action so that it verifies MESH frames.
* Change Mesh Link Metric to use one information element as amendment spec.
Draft 4.0 defined two different information elements for request and response.
Submitted by: monthadar@gmail.com
The scan code unlocks the comlock and calls into the driver. It then
assumes the state hasn't changed from underneath it.
Although I haven't seen this particular condition trigger, I'd like to
be informed if I or anyone else sees it.
What I'm thinking may occur:
* A cancellation comes in during the scan_end call;
* the cancel flag is set;
* but it's never checked, so scandone isn't updated;
* .. and the interface stays in the STA power save mode.
It's a subtle race, if it even exists.
PR: kern/163318
It doesn't _really_ help all that much, I'll commit something to
sys/net/if.c at some point explaining why, but the lock should be held
when checking/manipulating/branching because of said lock.
comlock, I'd like to find and analyse these cases to see if they
really are valid.
So, throw in a lock here and wait for the (hopefully!) inevitable
complaints.
* Change the mesh IE size to be IEEE80211_MESH_CONF_SZ rather than the
size of the structure;
* conf_cap is now a uint8_t rather than a uint16_t (uint16_t in D3.0,
uint8_t in the amendment spec);
* Update mesh config capability bits - earlier bits were from draft X,
current is amendment spec;
* Update the following to be an enum rather than #define and added
a VENDOR entry too from the amendment spec;
IEEE80211_MESHCONF_PATH_*
IEEE80211_MESHCONF_METRIC_*
IEEE80211_MESHCONF_CC_*
IEEE80211_MESHCONF_SYNC_*
IEEE80211_MESHCONF_AUTH_*
* Kept IEEE80211_MESHCONF_FORM_* and IEEE80211_MESHCONF_CAP_* as
defines because they are defined in a way that we need to mask in/out
information;
* In IEEE80211_MESHCONF_CAP_* IEEE80211_MESHCONF_CAP_TBTTA is removed
and 0x80 is made reserved as defined in the amendment spec.
Submitted by: monthadar@gmail.com
Reviewed by: rpaulo
compliance testing.
In order to allow for radar pattern matching to occur, the DFS CAC/NOL
handling needs to be made configurable. This commit introduces a new
sysctl, "net.wlan.dfs_debug", which controls which DFS debug mode
net80211 is in.
* 0 = default, CSA/NOL handling as per normal.
* 1 = announce a CSA, but don't add the channel to the non-occupy list
(NOL.)
* 2 = disable both CSA and NOL - only print that a radar event occured.
This code is not compiled/enabled by default as it breaks regulatory
handling. A user must enable IEEE80211_DFS_DEBUG in their kernel
configuration file for this option to become available.
Obtained from: Atheros
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".)
For example, this particular topology didn't work correctly from all
nodes:
[A] - [B] - [C] - [D]
Submitted by: Monthadar Al Jaberi <monthadar@gmail.com>
Reviewed by: bschmidt, adrian
This allows for multiple MAC addresses to be printed on the same
debugging line. ether_sprintf() uses a static char buffer and
thus isn't very useful here.
Submitted by: Monthadar Al Jaberi <monthadar@gmail.com>
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.
* Call it before sending probe responses, so the ACL code has the
chance to reject sending them.
* Pass the whole frame to the ACL code now, rather than just the
destination MAC - that way the ACL module can look at the frame
contents to determine what the response should be.
This is part of some uncommitted work to support band steering.
Sponsored by: Hobnob, Inc.
Some hardware (eg the AR9160 in STA mode) seems to "leak" unicast FROMDS
frames which aren't destined to itself. This angers the net80211 stack -
the existing code would fail to find an address in the node table and try
passing the frame up to each vap BSS. It would then be accepted in the
input routine and its contents would update the local crypto and sequence
number state.
If the sequence number / crypto IV replay counters from the leaked frame
were greater than the "real" state, subsequent "real" frames would be
rejected due to out of sequence / IV replay conditions.
This is also likely helpful if/when multi-STA modes are added to net80211.
Sponsored by: Hobnob, Inc.
This supports both station and hostap modes:
* Station mode quiet time element support listens to quiet time
IE's and modifies the local quiet time configuration as appropriate;
* Hostap mode both obeys the locally configured quiet time period
and includes it in beacon frames so stations also can obey as needed.
Submitted by: Himali Patel <himali.patel@sibridgetech.com>
Sponsored by: Sibridge Technologies
The SYSCTL_NODE macro defines a list that stores all child-elements of
that node. If there's no SYSCTL_DECL macro anywhere else, there's no
reason why it shouldn't be static.
I found this useful when trying to debug the AR9160 STA RX filter issue -
I'd get crypto reply errors but it wasn't entirely clear which TID it
was for.
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
didn't set a sequence number; it didn't show up earlier because the
hardware most people use for hostap (ie, AR5212 series stuff) sets the
sequence numbers up in hardware. Later hardware (AR5416, etc) which
can do 11n and aggregation require sequence numbers to be generated in
software.
Submitted by: paradyse@gmail.com
Approved by: re (kib)
On a TX failure, ic_raw_xmit will still call ieee80211_node_free().
There's no need to call it here.
Submitted by: moonlightakkiy@yahoo.ca
Approved by: re (kib)
channel list ends up with 2 entries, the HT and the legacy channel.
The scan itself is currently always done at legacy rates so we end
up receiving scan results for legacy networks on the HT channel and
erroneously assigning the BSS to the 11n channel. As the channel's
capabilities are used to setup the adapter we might end up with
non-working settings and/or firmware crashes.
Fix this by ensuring that scan results received on a HT channel
are only assigned to that channel if the htcap IE is available,
else use the legacy channel equivalent.
Tested by: Pawel Worach, Raoul Megelas, Maciej Milewski,
Andrei <az at azsupport dot com>
Approved by: re (kib)
TX for the given TID needs to be paused during ADDBA requests (and unpaused
once the session is established.) Since net80211 currently doesn't implement
software aggregation, if this pause/unpause is done in the driver (as it
is in my development branch) then it will need to be unpaused both on
ADDBA response and on ADDBA timeout.
This callback allows the driver to unpause TX for the relevant TID.
Reviewed by: bschmidt
Intel 4965 devices for example have HT40 on 2GHz completely disabled
but it is still supported for 5GHz. To handle that in sta mode we
need to check if we can "upgrade" to a HT40 channel after the
association, if that is not possible but we are still announcing
support to the remote side we are left with a very flabby connection.
Reviewed by: adrian
too. In that case don't fiddle with the seqno as drivers are supposed
to handle that.
Currently only the powersave feature does sent QoS-null-data frames
before and after a background scan which must be handled correctly. Due
to this being quite rare we don't fiddle around with starting of aggr
sessions.
* revert a local path change that shouldn't have made it to the commit
* fix some indenting/wrapping
* Fix the ale data copy - i should be copying into the ale data pointer,
not over the ale entry itself.
handling.
The current sequence number code does a few things incorrectly:
* It didn't try eliminating duplications from HT nodes. I guess it's assumed
that out of order / retransmission handling would be handled by the AMPDU RX
routines. If a HT node isn't doing AMPDU RX, then retransmissions need to
be eliminated. Since most of my debugging is based on this (as AMPDU TX
software packet aggregation isn't yet handled), handle this corner case.
* When a sequence number of 4095 was received, any subsequent sequence number
is going to be (by definition) less than 4095. So if the following sequence
number (0) doesn't initially occur and the retransmit is received, it's
incorrectly eliminated by the IEEE80211_FC1_RETRY && SEQ_LEQ() check.
Try to handle this better.
This almost completely eliminates out of order TCP statistics showing up during
iperf testing for the 11a, 11g and non-aggregate 11n AMPDU RX case. The only
other packet loss conditions leading to this are due to baseband resets or
heavy interference.
defines struct in6_addr, which is needed by ip6_hdr used in here.
Reviewed by: gnn
Sponsored by: The FreeBSD Foundation
Sponsored by: iXsystems
MFC after: 5 days
This is destined to be a lightweight and optional set of ALQ
probes for debugging events which are just impossible to debug
with printf/log (eg packet TX/RX handling; AMPDU handling.)
The probes and operations themselves will appear in subsequent
commits.
This introduces struct ieee80211_rx_stats - which stores the various kinds
of RX statistics which a MIMO and non-MIMO 802.11 device can export.
It also fleshes out the mimo export to userland (node_getmimoinfo()).
It assumes that MIMO radios (for now) export both ctl and ext channels.
Non-11n MIMO radios are possible (and I believe Atheros made at least
one), so if that chipset support is added, extra flags to the
struct ieee80211_rx_stats can be added to extend this support.
Two new input functions have been added - ieee80211_input_mimo() and
ieee80211_input_mimo_all() - which MIMO-aware devices can call with
MIMO specific statistics.
802.11 devices calling the non-MIMO input functions will still function.
The symptom: sometimes 11n (and non-11n) throughput is great.
Sometimes it isn't. Much teeth gnashing occured, and much kernel
bisecting happened, until someone figured out it was the order
of which things were rebooted, not the kernel versions.
(Which was great news to me, it meant that I hadn't broken if_ath.)
What we found was that sometimes the WME parameters for the best-effort
queue had a burst window ("txop") in which the station would be allowed
to TX as many packets as it could fit inside that particular burst
window. This improved throughput.
After initially thinking it was a bug - the WME parameters for the
best-effort queue -should- have a txop of 0, Bernard and I discovered
"aggressive mode" in net80211 - where the WME BE queue parameters
are changed if there's not a lot of high priority traffic going on.
The WME parameters announced in the association response and beacon
frames just "change" based on what the current traffic levels are.
So in fact yes, the STA was acutally supposed to be doing this higher
throughput stuff as it's just meant to be configuring things based on
the WME parameters - but it wasn't.
What was eventually happening was this:
* at startup, the wme qosinfo count field would be 0;
* it'd be parsed in ieee80211_parse_wmeparams();
* and it would be bumped (to say 10);
* .. and the WME queue parameters would be correctly parsed and set.
But then, when you restarted the assocation (eg hostap goes away and
comes back with the same qosinfo count field of 10, or if you
destroy the sta VIF and re-create it), the WME qosinfo count field -
which is associated not to the VIF, but to the main interface -
wouldn't be cleared, so the queue default parameters would be used
(which include no burst setting for the BE queue) and would remain
that way until the hostap qosinfo count field changed, or the STA
was actually rebooted.
This fix simply cleares the wme capability field (which has the count
field) to 0, forcing it to be reset by the next received beacon.
Thanks go to Milu for finding it and helping me track down what was
going on, and Bernard Schmidt for working through the net80211 and
WME specific magic.
uses of ic_curchan occur. Due to the nature of a scan, switching
channels constantly and all this happening without any kind of locks
held, it might happen that ic_curchan points to nowhere leading to
panics. Fix this by not allowing frame injections while in SCAN state.
Tested by: Paul B. Mahol <onemda at gmail.com>
If multiple networks are available the max bandwidth is one
condition used for selecting the "best" BSS. To achieve that
we should consider all parameters which affect the max RX rate.
This includes 20/40MHz, SGI and the of course the MCS set.
If the TX MCS parameters are available we should use those,
because an AP announcing support for receiving frames at 450Mbps
might only be able to transmit at 150Mbps (1T3R). I haven't seen
devices with support for transmitting at higher rates then
receiving, so prefering TX over RX information should be safe.
While here, remove the hardcoded assumption that MCS15 is the max
possible MCS rate, use MCS31 instead which really is the highest
rate (according to the 802.11n std). Also, fix a mismatch of an
40MHz/SGI check.
Contrary to the rateset information in legacy frames the MCS Set
field also contains TX capability information in cases where the
number of available TX and RX spartial streams differ. Because a
rateset doesn't contain that information we have to pull the
those directly from the hardware capabilities.
Get rid of the assumption that every device is capable of 40MHz,
SGI and 2 spartial streams. Instead of printing, in the worst case,
8 times 76 MCS rates, print logically connect ranges and the
support RX/TX streams.
A device without 40MHz and SGI support looks like:
ath0: 2T2R
ath0: 11na MCS 20Mhz
ath0: MCS 0-7: 6.5Mbps - 65Mbps
ath0: MCS 8-15: 13Mbps - 130Mbps
ath0: 11ng MCS 20Mhz
ath0: MCS 0-7: 6.5Mbps - 65Mbps
ath0: MCS 8-15: 13Mbps - 130Mbps
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.
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.
clean up parts of the *_recv_mgmt() functions.
- make sure appropriate counters are bumped and debug messages are printed
- order the unhandled subtypes by value and add a few missing ones
- fix some whitespace nits
- remove duplicate code in adhoc_recv_mgmt()
- remove a useless comment, probably left in while c&p
The current code transmits management and multicast frames at MCS 0.
What it should do is check whether the negotiated basic set is zero (and
the MCS set is not) before making this decision.
For now, simply default to the lowest negotiated rate, rather than
MCS 0. This fixes the behaviour with at least the DLINK DIR-825, which
ACKs but silently ignores block-ack (BA) response frames.
if a scan is running, report if a scan has been started. The return value
itself is not (yet) used anywhere in the tree and it is also not exported
to userspace.
MFC after: 1 month
the element's data length, frm[2] is the first byte of the element's data.
Submitted by: Monthadar Al Jaberi <monthadar at gmail.com>
MFC after: 1 week
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
beacon or probe-response frames. Fix the condition by checking for the
the array's content instead of the always existing array itself.
Reviewed by: rpaulo, stefanf
MFC after: 3 days
its internal data. This has been used to bypass missing calls in drivers
which do not use the ratectl framework correctly. Issue is, not all algos
use that variable, or even have internal data, therefore valid calls are
not done. Fix this by removing the checks, all driver issues should be
resolved.
MFC after: 1 week
the currently selected rate. The calculations of course need a valid
rate. To make that possible before any call to node_rate() is done,
initialize ni_txrate on none_node_init() calls.
MFC after: 1 week
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
This can happen if the algos are built as modules but are not loaded. If
the selected ratectl algo is not available, try to load it (The load
module functions does nothing currently). Add a dummy ratectl algo which
always selects the first available rate. Use that one if the desired algo
is not available.
MFC after: 1 week
802.11 duplicate detection. Upon looking at the standard, we discover
that 802.11-2007 says:
"A receiving QoS STA is also required to keep only the most recent
cache entry per<Address 2, TID, sequence-number> triple, storing only
the most recently received fragment number for that triple. A receiving
STA may omit tuples obtained from broadcast/multicast or ATIM frames
from the cache."
To fix this, we just disable duplicate detection for multicast/broadcast
frames.
Reviewed by: sam
MFC after: 4 weeks
Obtained from: DragonFly
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
ratectl_node_init() functions and since ni_rtctls was already
malloc'ed() we will panic. Fix this by using the already malloc'ed
pointer.
Found by: bschmidt
Reviewed by: bschmidt
* WPA-None requires ap_scan=2:
The major difference between ap_scan=1 (default) and 2 is, that no
IEEE80211_IOC_SCAN* ioctls/functions are called, though, there is a
dependency on those. For example the call to wpa_driver_bsd_scan()
sets the interface UP, this never happens, therefore the interface
must be marked up in wpa_driver_bsd_associate(). IEEE80211_IOC_SSID
also is not called, which means that the SSID has not been set prior
to the IEEE80211_MLME_ASSOC call.
* WPA-None has no support for sequence number updates, it doesn't make
sense to check for replay violations..
* I had some crashes right after the switch to RUN state, issue is
that sc->sc_lastrs was not yet defined.
Approved by: rpaulo (mentor)
MFC after: 3 weeks
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
iv_recv_mgmt(). iv_recv_mgmt() will generate management frame responses
and pass them to bpf before the management frame that triggered the
response.
PR: 144323
Submitted by: Alexander Egorenkov <egorenar at gmail.com>
MFC after: 2 weeks
Sponsored by: iXsystems, inc.
o Process the BAR frame on the adhoc, mesh and sta modes
o Fix the format of the ADDBA reply frame
o Fix references to the spec section numbers
Also, print the all the MCS rates in bootverbose.
Sponsored by: iXsystems, Inc.
Obtained from: //depot/user/rpaulo/80211n/...
ifmultiaddr structures' reference to the parent interface, unless the parent
interface is really detaching. While here, program only link layer multicast
filters to a wlan's hardware parent interface.
PR: kern/142391, kern/142392
Reviewed by: sam, rpaolo, bms
MFC after: 1 week
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.
This makes ifconfig list scan display the correct beacon interval
(previously it would int overflow). As a side effect, this makes the
ieee80211req_scan_result word aligned.
Submitted by: Paul B Mahol <onemda at gmail.com>
* fix the processing of RANN frames
* the originator and target addresses were swapped and while it worked
fine, it was not spec compliant.
MFC after: 3 days
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)
vnet.h, we now use jails (rather than vimages) as the abstraction
for virtualization management, and what remained was specific to
virtual network stacks. Minor cleanups are done in the process,
and comments updated to reflect these changes.
Reviewed by: bz
Approved by: re (vimage blanket)
* don't clobber proxy entries
* HWMP seq number processing, including discard of old frames
* flush routing table entries based on nexthop
* print route flags in ifconfig
* more debugging messages and comments
Proxy changes submitted by sam.
Approved by: re (kib)
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)
this was broken in r183248 when the check of wk_keyix was replaced by
a check of IEEE80211_KEY_DEVKEY (because the flag was clobbered). Define
IEEE80211_KEY_DEVICE to specify flags that are owned by net80211/driver
and use this to preserve IEEE80211_KEY_DEVKEY so we don't ask the driver
for another key index when we already have one.
Testing by: Daniel Thiele, Wes Morgan
Reviewed by: rpaulo
Approved by: re (kib)
* bridge support (sam)
* handling of errors (sam)
* deletion of inactive routing entries
* more debug msgs (sam)
* fixed some inconsistencies with the spec.
* decap is now specific to mesh (sam)
* print mesh seq. no. on ifconfig list mesh
* small perf. improvements
Reviewed by: sam
Approved by: re (kib)
(DPCPU), as suggested by Peter Wemm, and implement a new per-virtual
network stack memory allocator. Modify vnet to use the allocator
instead of monolithic global container structures (vinet, ...). This
change solves many binary compatibility problems associated with
VIMAGE, and restores ELF symbols for virtualized global variables.
Each virtualized global variable exists as a "reference copy", and also
once per virtual network stack. Virtualized global variables are
tagged at compile-time, placing the in a special linker set, which is
loaded into a contiguous region of kernel memory. Virtualized global
variables in the base kernel are linked as normal, but those in modules
are copied and relocated to a reserved portion of the kernel's vnet
region with the help of a the kernel linker.
Virtualized global variables exist in per-vnet memory set up when the
network stack instance is created, and are initialized statically from
the reference copy. Run-time access occurs via an accessor macro, which
converts from the current vnet and requested symbol to a per-vnet
address. When "options VIMAGE" is not compiled into the kernel, normal
global ELF symbols will be used instead and indirection is avoided.
This change restores static initialization for network stack global
variables, restores support for non-global symbols and types, eliminates
the need for many subsystem constructors, eliminates large per-subsystem
structures that caused many binary compatibility issues both for
monitoring applications (netstat) and kernel modules, removes the
per-function INIT_VNET_*() macros throughout the stack, eliminates the
need for vnet_symmap ksym(2) munging, and eliminates duplicate
definitions of virtualized globals under VIMAGE_GLOBALS.
Bump __FreeBSD_version and update UPDATING.
Portions submitted by: bz
Reviewed by: bz, zec
Discussed with: gnn, jamie, jeff, jhb, julian, sam
Suggested by: peter
Approved by: re (kensmith)
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
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)
o add a new facility for components to register send+recv handlers
o ieee80211_send_action and ieee80211_recv_action now use the registered
handlers to dispatch operations
o rev ieee80211_send_action api to enable passing arbitrary data
o rev ieee80211_recv_action api to pass the 802.11 frame header as it may
be difficult to locate
o update existing IEEE80211_ACTION_CAT_BA and IEEE80211_ACTION_CAT_HT handling
o update mwl for api rev
Reviewed by: rpaulo
Approved by: re (kensmith)
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)
bits but isi_state did not follow; expand it to 32 bits and pad to
maintain alignment. Note this is an incompatible change that
requires rebuilding of user applications.
Submitted by: rpaulo, cbzimmer, avatar
we receive the AssocResp, so we can only set ni_txparms properly
at that point. To make this possible make node_setuptxparms public
as ieee80211_node_setuptxparms.
o don't increment extracted tid, this was a vestige of IEEE80211_NONQOS_TID
being defined as 0 (w/ real tid's +1)
o handle 4-address frames (add IEEE80211_IS_DSTODS to check if an 802.11
header is DSTODS)
Submitted by: cbzimmer
Reviewed by: avatar
the ROUTETABLES kernel option thus there is no need to include opt_route.h
anymore in all consumers of vnet.h and no longer depend on it for module
builds.
Remove the hidden include in flowtable.h as well and leave the two
explicit #includes in ip_input.c and ip_output.c.
frames coming out of the ps q may have this set and removing it
causes the 802.11 header to not indicate more frames follow which can
result in the sta going to sleep and missing them
o IEEE80211_IOC_CHANSWITCH fixups:
- restrict to hostap vaps
- return EOPNOTSUPP instead of EINVAL when applied to !hostap vap
or to a vap w/o 11h enabled
- interpret count of 0 to mean cancel the current CSA
Reviewed by: rpaulo, avatar
characteristics force the stations to re-associate so protocol state
is re-initialized. Note that for 11h/DFS this is irrelevant as channel
changes are never cross-band.
Reviewed by: ctlaw
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
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
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:
o do not attach DLT_IEEE802_11_RADIO unless both tx and rx headers are
present; this is assumed in the capture code paths
o verify the above with asserts in ieee80211_radiotap_{rx,tx}
o add missing checks for active taps before calling ieee80211_radiotap_rx
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
previously always pointing to the default vnet context, to a
dynamically changing thread-local one. The currvnet context
should be set on entry to networking code via CURVNET_SET() macros,
and reverted to previous state via CURVNET_RESTORE(). Recursions
on curvnet are permitted, though strongly discuouraged.
This change should have no functional impact on nooptions VIMAGE
kernel builds, where CURVNET_* macros expand to whitespace.
The curthread->td_vnet (aka curvnet) variable's purpose is to be an
indicator of the vnet context in which the current network-related
operation takes place, in case we cannot deduce the current vnet
context from any other source, such as by looking at mbuf's
m->m_pkthdr.rcvif->if_vnet, sockets's so->so_vnet etc. Moreover, so
far curvnet has turned out to be an invaluable consistency checking
aid: it helps to catch cases when sockets, ifnets or any other
vnet-aware structures may have leaked from one vnet to another.
The exact placement of the CURVNET_SET() / CURVNET_RESTORE() macros
was a result of an empirical iterative process, whith an aim to
reduce recursions on CURVNET_SET() to a minimum, while still reducing
the scope of CURVNET_SET() to networking only operations - the
alternative would be calling CURVNET_SET() on each system call entry.
In general, curvnet has to be set in three typicall cases: when
processing socket-related requests from userspace or from within the
kernel; when processing inbound traffic flowing from device drivers
to upper layers of the networking stack, and when executing
timer-driven networking functions.
This change also introduces a DDB subcommand to show the list of all
vnet instances.
Approved by: julian (mentor)
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
