If the operator did not configure a "desired BSSID," then we simply
adopt the BSS node's new BSSID. If the operator configured a
"desired BSSID," the new BSSID is (probably) not the desired one,
so start scanning for it.
Note that a change of BSSID will occur as two ad hoc networks merge.
node. It's the right thing to do, but it is of pressing importance
because SampleRate's ath_rate_ctl_reset() will convert an unsupported
rate to an invalid rate-index of 0xff, and pass the index to
ath_hal_computetxtime(). ath_hal_computetxtime() does not tolerate
an invalid index; the CPU traps a divide-by-zero fault in
ath_hal_computetxtime().
to 0x1 instead of 0xffff, so the kernel will trap accidental
dereferences. I don't set IEEE80211_CHAN_ANYC to NULL because it
may have a distinct meaning in net80211. Thanks to Steve Woodford
for pointing out that 0xffff may be a valid kernel memory address
on x86.
1 Complete initialization of "faked up" ieee80211_nodes,
whose capabilities and other fields are wrong, when we
first receive a beacon or probe response from the
corresponding neighbor. This entails factoring
ieee80211_init_neighbor out of ieee80211_add_neighbor.
2 In adhoc mode, ic->ic_bss is present in the neighbors
table, ic->ic_sta, and it is not necessarily the wrong
node on which to mark statistics for a rx'd packet. Do
not reject ic->ic_bss and fake-up a new node without
comparing its MAC address with the address of the sender
in the rx'd packet. This fixes a memory leak.
Thanks to dyoung@, scw@, and perry@ for help testing.
2005-08-30 15:27 avatar
Properly set ic_curchan before calling back to device driver to do channel
switching(ifconfig devX channel Y). This fix should make channel changing
works again in monitor mode.
Submitted by: sam
X-MFC-With: other ic_curchan changes
2005-08-13 18:50 sam
revert 1.64: we cannot use the channel characteristics to decide when to
do 11g erp sta accounting because b/g channels show up as false positives
when operating in 11b.
Noticed by: Michal Mertl
2005-08-13 18:31 sam
Extend acl support to pass ioctl requests through and use this to
add support for getting the current policy setting and collecting
the list of mac addresses in the acl table.
Submitted by: Michal Mertl (original version)
MFC after: 2 weeks
2005-08-10 18:42 sam
Don't use ic_curmode to decide when to do 11g station accounting,
use the station channel properties. Fixes assert failure/bogus
operation when an ap is operating in 11a and has associated stations
then switches to 11g.
Noticed by: Michal Mertl
Reviewed by: avatar
MFC after: 2 weeks
2005-08-10 17:22 sam
Clarify/fix handling of the current channel:
o add ic_curchan and use it uniformly for specifying the current
channel instead of overloading ic->ic_bss->ni_chan (or in some
drivers ic_ibss_chan)
o add ieee80211_scanparams structure to encapsulate scanning-related
state captured for rx frames
o move rx beacon+probe response frame handling into separate routines
o change beacon+probe response handling to treat the scan table
more like a scan cache--look for an existing entry before adding
a new one; this combined with ic_curchan use corrects handling of
stations that were previously found at a different channel
o move adhoc neighbor discovery by beacon+probe response frames to
a new ieee80211_add_neighbor routine
Reviewed by: avatar
Tested by: avatar, Michal Mertl
MFC after: 2 weeks
2005-08-09 11:19 rwatson
Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and
IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to
ifnet.if_drv_flags. Device drivers are now responsible for
synchronizing access to these flags, as they are in if_drv_flags. This
helps prevent races between the network stack and device driver in
maintaining the interface flags field.
Many __FreeBSD__ and __FreeBSD_version checks maintained and continued;
some less so.
Reviewed by: pjd, bz
MFC after: 7 days
2005-08-08 19:46 sam
Split crypto tx+rx key indices and add a key index -> node mapping table:
Crypto changes:
o change driver/net80211 key_alloc api to return tx+rx key indices; a
driver can leave the rx key index set to IEEE80211_KEYIX_NONE or set
it to be the same as the tx key index (the former disables use of
the key index in building the keyix->node mapping table and is the
default setup for naive drivers by null_key_alloc)
o add cs_max_keyid to crypto state to specify the max h/w key index a
driver will return; this is used to allocate the key index mapping
table and to bounds check table loookups
o while here introduce ieee80211_keyix (finally) for the type of a h/w
key index
o change crypto notifiers for rx failures to pass the rx key index up
as appropriate (michael failure, replay, etc.)
Node table changes:
o optionally allocate a h/w key index to node mapping table for the
station table using the max key index setting supplied by drivers
(note the scan table does not get a map)
o defer node table allocation to lateattach so the driver has a chance
to set the max key id to size the key index map
o while here also defer the aid bitmap allocation
o add new ieee80211_find_rxnode_withkey api to find a sta/node entry
on frame receive with an optional h/w key index to use in checking
mapping table; also updates the map if it does a hash lookup and the
found node has a rx key index set in the unicast key; note this work
is separated from the old ieee80211_find_rxnode call so drivers do
not need to be aware of the new mechanism
o move some node table manipulation under the node table lock to close
a race on node delete
o add ieee80211_node_delucastkey to do the dirty work of deleting
unicast key state for a node (deletes any key and handles key map
references)
Ath driver:
o nuke private sc_keyixmap mechansim in favor of net80211 support
o update key alloc api
These changes close several race conditions for the ath driver operating
in ap mode. Other drivers should see no change. Station mode operation
for ath no longer uses the key index map but performance tests show no
noticeable change and this will be fixed when the scan table is eliminated
with the new scanning support.
Tested by: Michal Mertl, avatar, others
Reviewed by: avatar, others
MFC after: 2 weeks
2005-08-08 06:49 sam
use ieee80211_iterate_nodes to retrieve station data; the previous
code walked the list w/o locking
MFC after: 1 week
2005-08-08 04:30 sam
Cleanup beacon/listen interval handling:
o separate configured beacon interval from listen interval; this
avoids potential use of one value for the other (e.g. setting
powersavesleep to 0 clobbers the beacon interval used in hostap
or ibss mode)
o bounds check the beacon interval received in probe response and
beacon frames and drop frames with bogus settings; not clear
if we should instead clamp the value as any alteration would
result in mismatched sta+ap configuration and probably be more
confusing (don't want to log to the console but perhaps ok with
rate limiting)
o while here up max beacon interval to reflect WiFi standard
Noticed by: Martin <nakal@nurfuerspam.de>
MFC after: 1 week
2005-08-06 05:57 sam
fix debug msg typo
MFC after: 3 days
2005-08-06 05:56 sam
Fix handling of frames sent prior to a station being authorized
when operating in ap mode. Previously we allocated a node from the
station table, sent the frame (using the node), then released the
reference that "held the frame in the table". But while the frame
was in flight the node might be reclaimed which could lead to
problems. The solution is to add an ieee80211_tmp_node routine
that crafts a node that does exist in a table and so isn't ever
reclaimed; it exists only so long as the associated frame is in flight.
MFC after: 5 days
2005-07-31 07:12 sam
close a race between reclaiming a node when a station is inactive
and sending the null data frame used to probe inactive stations
MFC after: 5 days
2005-07-27 05:41 sam
when bridging internally bypass the bss node as traffic to it
must follow the normal input path
Submitted by: Michal Mertl
MFC after: 5 days
2005-07-27 03:53 sam
bandaid ni_fails handling so ap's with association failures are
reconsidered after a bit; a proper fix involves more changes to
the scanning infrastructure
Reviewed by: avatar, David Young
MFC after: 5 days
2005-07-23 01:16 sam
the AREF flag is only meaningful in ap mode; adhoc neighbors now
are timed out of the sta/neighbor table
2005-07-23 00:25 sam
o move inactivity-related debug msgs under IEEE80211_MSG_INACT
o probe inactive neighbors in adhoc mode (they don't have an
association id so previously were being timed out)
MFC after: 3 days
2005-07-22 22:11 sam
split xmit of probe request frame out into a separate routine that
takes explicit parameters; this will be needed when scanning is
decoupled from the state machine to do bg scanning
MFC after: 3 days
2005-07-22 21:48 sam
split 802.11 frame xmit setup code into ieee80211_send_setup
MFC after: 3 days
2005-07-22 18:57 sam
simplify ic_newassoc callback
MFC after: 3 days
2005-07-22 18:54 sam
simplify ieee80211_ibss_merge api
MFC after: 3 days
2005-07-22 18:50 sam
add stats we know we'll need soon and some spare fields for future expansion
MFC after: 3 days
2005-07-22 18:45 sam
simplify tim callback api
MFC after: 3 days
2005-07-22 18:42 sam
don't include 802.3 header in min frame length calculation as it may
not be present for a frag; fixes problem with small (fragmented) frames
being dropped
Obtained from: Atheros
MFC after: 3 days
2005-07-22 18:36 sam
simplify ieee80211_node_authorize and ieee80211_node_unauthorize api's
MFC after: 3 days
2005-07-22 18:31 sam
simplifiy ieee80211_send_nulldata api
MFC after: 3 days
2005-07-22 18:29 sam
simplify rate set api's by removing ic parameter (implicit in node reference)
MFC after: 3 days
2005-07-22 18:21 sam
reject association requests with a wpa/rsn ie when wpa/rsn is not
configured on the ap; previously we either ignored the ie or (possibly)
failed an assertion
Obtained from: Atheros
MFC after: 3 days
2005-07-22 18:16 sam
missed one in last commit; add device name to discard msgs
2005-07-22 18:13 sam
include device name in discard msgs
2005-07-22 18:12 sam
add diag msgs for frames discarded because the direction field is wrong
2005-07-22 18:08 sam
split data frame delivery out to a new function ieee80211_deliver_data
2005-07-22 18:00 sam
o add IEEE80211_IOC_FRAGTHRESHOLD for getting+setting the
tx fragmentation threshold
o fix bounds checking on IEEE80211_IOC_RTSTHRESHOLD
MFC after: 3 days
2005-07-22 17:55 sam
o add IEEE80211_FRAG_DEFAULT
o move default settings for RTS and frag thresholds to ieee80211_var.h
2005-07-22 17:50 sam
diff reduction against p4: define IEEE80211_FIXED_RATE_NONE and use
it instead of -1
2005-07-22 17:37 sam
add flags missed in last merge
2005-07-22 17:36 sam
Diff reduction against p4:
o add ic_flags_ext for eventual extention of ic_flags
o define/reserve flag+capabilities bits for superg,
bg scan, and roaming support
o refactor debug msg macros
MFC after: 3 days
2005-07-22 06:17 sam
send a response when an auth request is denied due to an acl;
might be better to silently ignore the frame but this way we
give stations a chance of figuring out what's wrong
2005-07-22 06:15 sam
remove excess whitespace
2005-07-22 05:55 sam
use IF_HANDOFF when bridging frames internally so if_start gets
called; fixes communication between associated sta's
MFC after: 3 days
2005-07-11 04:06 sam
Handle encrypt of arbitarily fragmented mbuf chains: previously
we bailed if we couldn't collect the 16-bytes of data required
for an aes block cipher in 2 mbufs; now we deal with it. While
here make space accounting signed so a sanity check does the
right thing for malformed mbuf chains.
Approved by: re (scottl)
2005-07-11 04:00 sam
nuke assert that duplicates real check
Reviewed by: avatar
Approved by: re (scottl)
802.11 header + opt(crypto header) + LLC writable, regardless of
crypto state. If s/w crypto is enabled, still make the entire
chain writable, as before.
Reviewed by: Nick Hudson
before testing the key flags.
XXX Problems remain. Nick Hudson points out my questionable
XXX M_COPY_PKTHDR usage. Also, it seems to me that we may not be
XXX protected against writing a read-only mbuf during the crypto
XXX encapsulation stage, even if hardware does the actual crypto.
as I thought. The latter actually sets the station listen interval.
We cannot get/set "drop-unencrypted" and "privacy" properties
independently with SIOCS80211NWKEY, so put back IEEE80211_IOC_PRIVACY
and IEEE80211_IOC_DROPUNENCRYPTED.
Thanks Sam Leffler for pointing out my mistakes.
compile support for the duplicate ioctls from FreeBSD if it is a
COMPAT_FREEBSD kernel:
IEEE80211_IOC_SSID
IEEE80211_IOC_WEPTXKEY
IEEE80211_IOC_CHANNEL
IEEE80211_IOC_PRIVACY
IEEE80211_IOC_DROPUNENCRYPTED
IEEE80211_IOC_BSSID
IEEE80211_IOC_BEACON_INTERVAL
IEEE80211_IOC_WEPKEY
in NetBSD 2.0:
* If 2.x compatibility is enabled (#ifdef COMPAT_20),
compile support for OSIOCG80211STATS and OSIOCG80211ZSTATS,
with the same ioctl numbers as SIOCG80211STATS and
SIOCG80211ZSTATS in 2.x. OSIOCG80211STATS and
OSIOCG80211ZSTATS return an ieee80211_ostats struct,
which has the same layout as ieee80211_stats in 2.x.
* Add new ioctl numbers for SIOCG80211STATS and SIOCG80211ZSTATS.
Both these ioctls will copy at most ifr_buflen bytes of
the new ieee80211_stats to ifr_buf.
back out my change to ieee80211_crypto_encap that made it free its
mbuf argument on error. I had thought it was a bug. It was not.
It's the drivers that are broken. Make an(4), atw(4), ipw(4),
iwi(4), ral(4), rtw(4), ural(4), and wi(4) free the mbuf when
ieee80211_crypto_encap returns NULL. Also, return ath(4) to the
way it was---i.e., free the mbuf.
Thanks to Sam Leffler to pointing out my mistake.
count on the node that is passed in, because it belongs to the
driver. Also, do not increase the reference count on the refined
node, because ieee80211_refine_node_for_beacon's caller (ieee80211_input)
will never decrease the reference count.
As a general rule, reference counts are used for driver code to
assert ownership of ieee80211_nodes that are shared by the driver
and net80211 layer.
the RX direction, but not in the TX direction. The
net80211 crypto framework doesn't seem to cope very well
with the assymetry (I'm probably missing something), so
I will use software WEP for now.
net80211: In ieee80211_compute_duration, figure out whether to add
the WEP header to the packet overhead by checking the
WEP bit in the Frame Control field of the 802.11 header,
instead of checking the IEEE80211_F_PRIVACY flag.
Also, if the WEP bit is present, assume that the frame
described by (wh, len) has already already been WEP
encapsulated, and adjust the payload length accordingly.
XXX that's a grotty hack that I will have to revisit,
later.
Change the way we walk 802.11 peers/clients: for each eligible
interface, walk the ic_sta (peers/clients) table, first; walk the
ic_scan (scan results) table, second; then visit the ic_bss (node
for the network joined/created by the interface).
