Commit Graph

44 Commits

Author SHA1 Message Date
Gleb Smirnoff
7a79cebfba Replay r286410. Change KPI of how device drivers that provide wireless
connectivity interact with the net80211 stack.

Historical background: originally wireless devices created an interface,
just like Ethernet devices do. Name of an interface matched the name of
the driver that created. Later, wlan(4) layer was introduced, and the
wlanX interfaces become the actual interface, leaving original ones as
"a parent interface" of wlanX. Kernelwise, the KPI between net80211 layer
and a driver became a mix of methods that pass a pointer to struct ifnet
as identifier and methods that pass pointer to struct ieee80211com. From
user point of view, the parent interface just hangs on in the ifconfig
list, and user can't do anything useful with it.

Now, the struct ifnet goes away. The struct ieee80211com is the only
KPI between a device driver and net80211. Details:

- The struct ieee80211com is embedded into drivers softc.
- Packets are sent via new ic_transmit method, which is very much like
  the previous if_transmit.
- Bringing parent up/down is done via new ic_parent method, which notifies
  driver about any changes: number of wlan(4) interfaces, number of them
  in promisc or allmulti state.
- Device specific ioctls (if any) are received on new ic_ioctl method.
- Packets/errors accounting are done by the stack. In certain cases, when
  driver experiences errors and can not attribute them to any specific
  interface, driver updates ic_oerrors or ic_ierrors counters.

Details on interface configuration with new world order:
- A sequence of commands needed to bring up wireless DOESN"T change.
- /etc/rc.conf parameters DON'T change.
- List of devices that can be used to create wlan(4) interfaces is
  now provided by net.wlan.devices sysctl.

Most drivers in this change were converted by me, except of wpi(4),
that was done by Andriy Voskoboinyk. Big thanks to Kevin Lo for testing
changes to at least 8 drivers. Thanks to pluknet@, Oliver Hartmann,
Olivier Cochard, gjb@, mmoll@, op@ and lev@, who also participated in
testing.

Reviewed by:	adrian
Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2015-08-27 08:56:39 +00:00
Adrian Chadd
ba2c1fbc03 Revert the wifi ifnet changes until things are more baked and tested.
* 286410
* 286413
* 286416

The initial commit broke a variety of debug and features that aren't
in the GENERIC kernels but are enabled in other platforms.
2015-08-08 01:10:17 +00:00
Gleb Smirnoff
79d2c5e857 Change KPI of how device drivers that provide wireless connectivity interact
with the net80211 stack.

Historical background: originally wireless devices created an interface,
just like Ethernet devices do. Name of an interface matched the name of
the driver that created. Later, wlan(4) layer was introduced, and the
wlanX interfaces become the actual interface, leaving original ones as
"a parent interface" of wlanX. Kernelwise, the KPI between net80211 layer
and a driver became a mix of methods that pass a pointer to struct ifnet
as identifier and methods that pass pointer to struct ieee80211com. From
user point of view, the parent interface just hangs on in the ifconfig
list, and user can't do anything useful with it.

Now, the struct ifnet goes away. The struct ieee80211com is the only
KPI between a device driver and net80211. Details:

- The struct ieee80211com is embedded into drivers softc.
- Packets are sent via new ic_transmit method, which is very much like
  the previous if_transmit.
- Bringing parent up/down is done via new ic_parent method, which notifies
  driver about any changes: number of wlan(4) interfaces, number of them
  in promisc or allmulti state.
- Device specific ioctls (if any) are received on new ic_ioctl method.
- Packets/errors accounting are done by the stack. In certain cases, when
  driver experiences errors and can not attribute them to any specific
  interface, driver updates ic_oerrors or ic_ierrors counters.

Details on interface configuration with new world order:
- A sequence of commands needed to bring up wireless DOESN"T change.
- /etc/rc.conf parameters DON'T change.
- List of devices that can be used to create wlan(4) interfaces is
  now provided by net.wlan.devices sysctl.

Most drivers in this change were converted by me, except of wpi(4),
that was done by Andriy Voskoboinyk. Big thanks to Kevin Lo for testing
changes to at least 8 drivers. Thanks to Olivier Cochard, gjb@, mmoll@,
op@ and lev@, who also participated in testing. Details here:

https://wiki.freebsd.org/projects/ifnet/net80211

Still, drivers: ndis, wtap, mwl, ipw, bwn, wi, upgt, uath were not
tested. Changes to mwl, ipw, bwn, wi, upgt are trivial and chances
of problems are low. The wtap wasn't compilable even before this change.
But the ndis driver is complex, and it is likely to be broken with this
commit. Help with testing and debugging it is appreciated.

Differential Revision:	D2655, D2740
Sponsored by:	Nginx, Inc.
Sponsored by:	Netflix
2015-08-07 11:43:14 +00:00
Gleb Smirnoff
c8f5794e0a Use name from ieee80211com instead of parent ifnet, in debugging printfs.
Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2015-05-25 14:30:44 +00:00
Gleb Smirnoff
76039bc84f The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit pollution via if_var.h

Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2013-10-26 17:58:36 +00:00
Monthadar Al Jaberi
62f0748505 Update ddb to print mesh routing table.
* Modified _db_show_vap and _db_show_com to print mesh routing table
  if the 'm' modifier is specified;

Approved by:	adrian (mentor)
2013-02-07 21:29:48 +00:00
Monthadar Al Jaberi
b5df85a6fd Implemented so that Mesh forwarding information lifetime is dynamic.
* Introduced ieee80211_mesh_rt_update that updates a route with the
 maximum(lifetime left, new lifetime);
 * Modified ieee80211_mesh_route struct by adding a lock that will be used
 by both ieee80211_mesh_rt_update and precursor code (added in future commit);
 * Modified in ieee80211_hwmp.c HWMP code to use new ieee80211_mesh_rt_update;
 * Modified mesh_rt_flush_invalid to use new ieee80211_mesh_rt_update;
 * mesh_rt_flush also checks that lifetime == 0, this gives route discovery
 a change to complete;
 * Modified mesh_recv_mgmt case IEEE80211_FC0_SUBTYPE_BEACON:
 when ever we received a beacon from a neighbor we update route lifetime;

Approved by: adrian
2012-05-01 15:47:30 +00:00
Adrian Chadd
2aa563dfeb Migrate the net80211 TX aggregation state to be from per-AC to per-TID.
TODO:

* Test mwl(4) more thoroughly!

Reviewed by:	bschmidt (for iwn)
2012-04-15 20:29:39 +00:00
Robert Watson
530c006014 Merge the remainder of kern_vimage.c and vimage.h into vnet.c and
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)
2009-08-01 19:26:27 +00:00
Robert Watson
eddfbb763d Build on Jeff Roberson's linker-set based dynamic per-CPU allocator
(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)
2009-07-14 22:48:30 +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
Bjoern A. Zeeb
5736e6fb9d After cleaning up rt_tables from vnet.h and cleaning up opt_route.h
a lot of files no longer need route.h either. Garbage collect them.
While here remove now unneeded vnet.h #includes as well.
2009-06-23 17:03:45 +00:00
Bjoern A. Zeeb
8d8bc0182e After r193232 rt_tables in vnet.h are no longer indirectly dependent on
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.
2009-06-08 19:57:35 +00:00
Sam Leffler
ee5cf10652 add iv_flags_ht and ic_flags_ht 2009-06-07 22:03:25 +00:00
Sam Leffler
e1cfcbcb4e 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 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
86629111ea don't say "ac WME_AC_BE"; remove "ac" 2009-05-02 20:28:55 +00:00
Sam Leffler
43049c4828 o dump tx/rx seq#'s for qos tid's
o improve check for when to dump rx ampdu state
2009-05-02 20:21:21 +00:00
Sam Leffler
ce7fa847ac revert wip 2009-05-01 21:31:39 +00:00
Sam Leffler
7f6a5468a6 improvements:
o formatting
o more rx ampdu state
o tdma state
o show ifnet names
o show auth policy name
2009-04-26 22:49:25 +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
Bjoern A. Zeeb
33553d6e99 For all files including net/vnet.h directly include opt_route.h and
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.
2009-02-27 14:12:05 +00:00
Sam Leffler
d3f5f855e8 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
Sam Leffler
30a4e0680d o change _db_show_key to always dump the contents instead of checking
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
2009-02-05 20:26:53 +00:00
Sam Leffler
f2ce0f5181 o add IEEE80211_KEY_BITS for %b printing of wk_flags
o replace hand-rolled code to print wk_flags
o add display of ni_ucastkey in show sta
o fix \n in _db_show_key
2009-02-05 19:20:34 +00:00
Sam Leffler
3d13a95516 o make %b msg bit defines public (to user apps too)
o rename IEEE80211_C_CRYPTO_BITS to IEEE80211_CRYPTO_BITS
2009-01-27 23:00:38 +00:00
Sam Leffler
10ad9a77f3 TDMA support for long distance point-to-point links using ath devices:
o add net80211 support for a tdma vap that is built on top of the
  existing adhoc-demo support
o add tdma scheduling of frame transmission to the ath driver; it's
  conceivable other devices might be capable of this too in which case
  they can make use of the 802.11 protocol additions etc.
o add minor bits to user tools that need to know: ifconfig to setup and
  configure, new statistics in athstats, and new debug mask bits

While the architecture can support >2 slots in a TDMA BSS the current
design is intended (and tested) for only 2 slots.

Sponsored by:	Intel
2009-01-08 17:12:47 +00:00
Sam Leffler
31378b1c87 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 Leffler
1b999d643c Replace adhoc checks in ieee80211_start with a per-node flag that
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
2008-12-15 00:47:24 +00:00
Bjoern A. Zeeb
4b79449e2f Rather than using hidden includes (with cicular dependencies),
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
2008-12-02 21:37:28 +00:00
Marko Zec
8b615593fc Step 1.5 of importing the network stack virtualization infrastructure
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
2008-10-02 15:37:58 +00:00
Andrew Thompson
4ea219803e Use db_printsym to lookup and print the function pointers. 2008-09-25 16:46:36 +00:00
Sam Leffler
49942a9784 Fix handling of shortgi: use the local configuration (and implicitly
device capabilities) to decide whether to use short gi.  Drivers
inspect ni_flags to decide whether to send a frame w/ short sgi.
2008-09-22 00:14:50 +00:00
Sam Leffler
44f7a6edcf RIFS support; needs driver callback for dynamic state change 2008-09-22 00:10:22 +00:00
Sam Leffler
8c070d69c7 MIMO power save support; still needs callbacks for notifying drivers
of dynamic state change in station mode.
2008-09-21 23:59:14 +00:00
Sam Leffler
e6e547d57b Crypto api changes:
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)
2008-09-21 23:16:19 +00:00
Sam Leffler
c5f9511e91 Cleanup starting seq# for tx ampdu:
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)
2008-09-21 22:22:28 +00:00
Sam Leffler
9d365d36cc o show key indices w/o adjustment
o display all key flags symbolically
2008-09-06 17:18:38 +00:00
Sam Leffler
1cc8822ed7 purge ni_reqcw; not used and never will be 2008-09-06 17:15:55 +00:00
Julian Elischer
7a5ecde3f7 This instance of ifnet got forgotten. 2008-08-25 05:20:29 +00:00
Sam Leffler
c4810a1bff missing piece of last commit; add RESUME flag bit definition 2008-05-28 23:20:27 +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
82fd2577a8 add DFS capability bit and use it to auto-enable DFS support 2008-05-11 23:32:07 +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