again hopefully.
Rather than blindly removing a supposedly unused variable as reported by
the Clang Static Analyzer, inspect the code and hide them with proper
#ifdefs as they are used in certain conditional parts of the code.
This change adds few methods for net80211 channel table setup:
- ieee80211_add_channel()
- ieee80211_add_channel_ht40()
(primarily for drivers, that parse EEPROM to get channel list -
they will allow to hide implementation details).
- ieee80211_add_channel_list_2ghz()
- ieee80211_add_channel_list_5ghz()
(mostly as a replacement for ieee80211_init_channels() - they will allow
to specify non-default channel list; may be used in ic_getradiocaps()).
Tested with wpi(4) (add_channel) and rum(4) (add_channel_list_2ghz).
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D6124
We don't have a separate bss node; instead we dup the first node we saw
and turn that into the BSS node. This means that action frames from
that node would be rejected.
So, check that the node is the bss node /and/ the MAC doesn't match ni_macaddr.
That's the "right" way for now to verify it's an unknown node.
This fixes handling action frames in adhoc mode, which includes negotiating
11n aggregation via ADDBA/DELBA.
This by itself isn't enough to correctly create 11n adhoc networks; but
it is required for aggregation to be negotiated.
Tested:
* AR9380, 11n adhoc mode
* broadcom 11ac adhoc (vendor platform)
Sponsored by: Eva Automation, Inc.
This is in preparation for exposing configuring STBC flags up to ifconfig
so STBC TX/RX can be configured at runtime.
* Set the FHT_STBC flags for TX/RX if the HT capabilitiex exist
* Clear the RX STBC HT capability flag when creating a HTCAP IE, so
we only announce it if it's configured in the FHT flags.
Tested:
* AR9331 (carambola2), AP/STA modes
rounddown2 tends to produce longer lines than the original code
and when the code has a high indentation level it was not really
advantageous to do the replacement.
This tries to strike a balance between readability using the macros
and flexibility of having the expressions, so not everything is
converted.
ieee80211_scan_done().
Refresh comments that reference scan_next() method
(does not exist since r191746) + fix spelling of 'current'.
Differential Revision: https://reviews.freebsd.org/D5137
- Allow to enable/disable promiscuous mode when:
* interface is not a member of bridge, or;
* request was issued by user (ifconfig wlan0 promisc), or;
* interface is in MONITOR or AHDEMO mode.
- Drop local workarounds in mwl(4) and malo(4).
Tested with:
- Intel 3945BG, STA mode;
- RTL8188CUS, MONITOR mode;
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D5472
Hide subtype mask/shift (which is used for index calculation
in ieee80211_mgt_subtype_name[] array) in function call.
Tested with RTL8188CUS, STA mode.
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D5369
le*dec / le*enc functions.
Replace net80211 specific macros with system-wide bytestream
encoding/decoding functions:
- LE_READ_2 -> le16dec
- LE_READ_4 -> le32dec
- LE_WRITE_2 -> le16enc
- LE_WRITE_4 -> le32enc
+ drop ieee80211_input.h include, where it was included for these
operations only.
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D6030
Although we correctly (now!) calculate the right A-MPDU parameters, the
ioctl() has some faulty logic for choosing which to display. The BSS
params are what were advertised to us, and we would have chosen the
lower of theirs/ours when advertising the HT bits back at them.
So, we /should/ track and fix that so we display the correct A-MPDU
density and size.
However, since I'm a forgetful type, and I don't want to have to re-learn
that this is wrong, drop in a comment so I or someone else fixes it.
Or, when I discover this again in 4 years, I don't have to go digging
too much to remember.
I was seeing the stack constantly attempt to renegotiate A-MPDU TX
even after 3 failures. My hunch is that the direct ticks comparison
is failing around the ticks wrap-around point.
This failure shouldn't /really/ happen normally, but it turns out being
the IBSS master node on FreeBSD doesn't quite setup 11n right, so
negotiating A-MPDU TX fails.
It's 2016 and vendors (including us!) still have 802.11n TX/RX sequence
handling bugs. It's suboptimal, but I'd rather see us default to handling
things in a sensible way.
So, just delete the #ifdef'ed code for now. I'll leave the option in
so it doesn't break existing configurations.
This all started because I've started getting reports about urtwn not
working after I enabled 802.11n support, and it's because the ARM kernel
configs don't include A-MPDU RX aging.
This makes it easier to track which node is having what done do it
during normal use.
This is likely the eighth time I've done this since I started doing
net80211 development, so I think it's about time I just committed it.
The ath(4) driver now sees beacons and management frames for different
BSSIDs in IBSS mode, which is a problem when you're in a very busy
IBSS environment.
So, expose this function so drivers can use it to check if the current
RX node is actually for a BSS we need to pay attention to or not.
PR: kern/208644
Sponsored by: Eva Automation. Inc.
This prevents nodes being created for peers on BSSes that are not our own.
(Ie, same channel, IBSS, but different BSS.)
The "IBSS merge" thing was fixed by me enabling "see all beacons" in
the ath(4) driver a few months ago. Trouble is, we now need the filtering
again.
Tested:
* ath(4), IBSS, on a very busy IBSS channel with lots (> 15) IBSS networks.
PR: kern/208643
Sponsored by: Eva Automation, Inc.
A-MSDU is another 11n aggregation mechanism where multiple ethernet
frames get LLC encapsulated (so they have a length field), padded,
and put in a single MPDU (802.11 MAC frame.) This means it gets sent
out as a single frame, with a single seqno, it's acked as one frame, etc.
It turns out that, hah, atheros fast frames is almost but not quite
like this, so I'm reusing all of the current superg/fast-frames stuff
in order to actually transmit A-MSDU. Yes, this means that A-MSDU
frames are also only aggregated two at a time, so it's not necessarily
a huge win, but it's better than nothing.
This doesn't do anything by default - the driver needs to say it does
A-MSDU as well as set the AMSDU software TX capability so this code path
gets exercised.
For now, the only driver that enables this is urtwn. I'll enable it
for rsu at some point soon.
Tested:
* Add an amsdu encap path to aggregate two frames, same as the
fast-frames path.
* Always do the superg init/teardown and node init/teardown stuff,
regardless of whether the nodes are doing fast-frames (the ATH
capability stuff.) That way we can reuse it for amsdu.
* Don't do AMSDU for multicast/broadcast and EAPOL frames.
* If we're doing A-MPDU, then don't bother doing FF/A-MSDU.
We can likely do both together, but I don't want to change
behaviour.
* Teach the fast frames approx txtime logic to support the 11n
rates. But, since we don't currently have a full "current rate"
support, assume it's HT20, long-gi, etc. That way we overshoot
on the TX time estimation, so we're always inside the requirements.
(And we only aggregate two frames for now, so we're not really
going to exceed that.)
* Drop the maximum FF age default down to 2ms, otherwise we end up
with some very annoyingly large latencies.
TODO:
* We only aggregate two ethernet frames, so I'm not checking the max
A-MSDU size. But when it comes time to support >2 frames, we should
obey that.
Tested:
* urtwn(4)
* begin moving the 11n macros out of ieee80211_phy.c and
into a header so they can be used elsewhere.
* rename some of them into the IEEE80211_* namespace.
* convert HT_RC_2_MCS() to work with three-stream rates.
do software A-MSDU encapsulation.
Right now there's AMSDU TX/RX capability bits and they're mostly
unused, however I'd like to maintain those as the general configuration,
not also "please software encap AMSDU." For platforms that can do
A-MSDU in firmware (iwn, iwm, etc) then their init paths can read
this flag to configure A-MSDU.
It turns out that these will clash very annoyingly with the linux
macros in the linuxkpi layer, so let the wookie^Wlinux win.
The only user that I can find is ath(4), so fix it there too.
It turns out that madwifi actually has the basics for uAPSD implemented
but it was never ported to FreeBSD. I may eventually port most of the
pieces; I'll see how it goes!
Obtained from: Madwifi
This is a subset of what's in the linux 802.11ac implementation.
I've verified that the bits that mention an 802.11ac draft are
still the same in 802.11ac-2013 and noted it accordingly.
This is for the most part one big no-op.
Obtained from: 802.11ac-2013.pdf
