ieee80211_input():
* Do not discard management frames in station mode just because they have
the wrong BSSID.
* Do not discard beacons in station and host-AP mode when not scanning.
* Some minor rearrangement. Update node statistics even if the packet is
rejected.
ieee80211_recv_mgmt():
* Accept probe responses and beacons in station and host-AP even when not
scanning.
* Do not immediately free the node created by a beacon or probe response.
XXX Should I check BSSIDs more carefully in ieee80211_recv_mgmt() --
specifically for ASSOC_RESP, REASSOC_RESP, AUTH, DEAUTH and DISASSOC?
Fix a problem with APs that advertise multiple SSIDs:
Change the footprint of ieee80211_find_node_with_channel() to take a SSID as
well, and, if not empty, compared it with the existing nodes. This causes
us to allocate multiple nodes for the same AP. Without this we were only
leaving one SSID in the node table, which might not be the desired one, and
so the interface would fail to fully initialize. (Reported by he@ with a
Cisco 350 AP.)
Responses. Ad hoc mode uses these entries to track network peers.
This provides passive-scan information for the current channel in
infrastructure mode (XXX really should keep it in a different
table). Host APs will someday use these entries to track APs in
the same ESS for AP-to-AP bridging.
must use a full node for received management frames, or we are unable to
complete association and talk to the client. I could add an
"if mode == HOSTAP" to fix this, but instead I am reverting the change and
remanding it to the person who broke it.
IBSS nodes. Do not send an EXPIRE-type DEAUTH message when IBSS
nodes time-out. This ends the panic that rev 1.25 fixed, but
without a dual-use ieee80211_node_leave.
will eventually share it.
In the IBSS merge logic, check conditions in a different order so
that they run faster in the common case---no merge. Fix the
rate-limiting on the debug outputs (enabled by IFF_LINK0).
Abstract some of the node management code into separate functions, and use them
throughout, plugging memory leaks.
Allocate the AID allocation map dynamically.
Change the signature of IEEE80211_DPRINTF() so that it uses a bitmask, and
convert some of the if_printf()s to IEEE80211_DPRINTF()s. XXX I'm using a
global variable at the moment rather than per-interface.
that we create the network with the BSSID preferred by the operator.
[Say the operator set the desired BSSID with 'ifconfig atw0 bssid
02:25:25:75:75:75'. If no such network is found during scanning,
then create the network with that BSSID.]
Instead, change *_set11gbasicrate() to *_setbasicrates(), have it operate on
all modes, and call it from *_ifattach(). Also, fix obvious bugs in it (it
had an off-by-one error, at least).
beacon-sender's ieee80211_node, if ni->ni_esslen == 0. This fixes
WEP for Matthew. I think that it also will save us from IBSS
splits.
Thanks again, Matthew Gream.
peer, we have to copy the "master" rate table to the faked-up node's
rate table, or else ath0 will complain, "ath0: bogus xmit rate
0x0". Thank you Konstantin KABASSANOV for reporting this problem.
peer, we have to copy the "master" rate table to the faked-up node's
rate table, or else ath0 will complain, "ath0: bogus xmit rate
0x0". Thank you Konstantin KABASSANOV for reporting this problem.
net.link.ieee80211. The convention is that nodes directly under
net are protocol families (PF_*).
Also, simplify the sysctl setup for net80211 and rssadapt, following
another suggestion by Andrew.
and off.
Add a sysctl, net.ieee80211.maxinact, for adjusting the node time-out
interval. After net.ieee80211.maxinact seconds of inactivity, an
AP will purge a peer/client-record. Now the client has to reassociate.
independently from net80211 debug messages. Create a new sysctl,
net.ieee80211.rssadapt.debug, for turning the debug messages on
and off.
Create a new sysctl, net.ieee80211.rssadapt.expavgctl, to control
the rate of decay for the exponential averages used by rssadapt(9).
Fix authentication where I had botched it with the FreeBSD import.
(In FreeBSD, net80211 is strangely subroutine-averse, so where we
have ieee80211_auth_open and ieee80211_auth_shared, they incorporate
all of ieee80211_auth_open into ieee80211_recv_mgmt. I had not
realized that was why the 20 lines of new code.)
I have pulled that code into the function ieee80211_rssadapt_choose
so that I can re-use it in ath(4), atw(4), and in other drivers.
In rssadapt(9), I have also created a struct ieee80211_rssadapt_expavgctl
that contains parameters for rate adaptation. When IEEE80211_RSSADAPT_DEBUG
is enabled, I will using sysctl to expose an ieee80211_rssadapt_expavgctl
for each wireless device.
Also in rssadapt(9), I have introduced an interpolate() macro which
makes the exponential-averaging code more compact.
denote a signed dBm Rx power, so rename them to _DBM_ and change
the signedness. Add new _DB_ flags for unsigned Rx power measured
from an arbitrary reference.
Try to synchronize net80211/ieee80211_radiotap.h with my tcpdump
sources (which public tcpdump has not seen, yet) and with FreeBSD.
802.11 drivers will use ieee80211_find_rxnode to match each received
packet with the ieee80211_node belonging to the sender. The driver
will use the ieee80211_node to track the sender's RSSI and other
statistics for, e.g., rate adaptation.
ieee80211_find_rxnode "fakes-up" missing ieee80211_nodes in IBSS
mode and in ad-hoc demo mode when it is appropriate. See the comments
in the source.
Also add ieee80211_find_txnode, which looks up the ieee80211_node
belonging to a MAC destination. ieee80211_find_txnode will also
fake-up missing nodes in IBSS/ad-hoc demo mode.
In ieee80211_encap, use ieee80211_find_txnode. This fixes the bug
in ad hoc packet-transmission reported by Greg Troxel, Urban Boquist,
and Kurt Schreiner.
Adaptation Strategy for IEEE 802.11 WLAN via Received Signal Strength
Measurement" by Javier del Prado Pavon and Sunghyun Choi. This
module should provide faster adaptation and higher throughput than
Lucent's rate-adaptation scheme.
Individual drivers need to be modified to use this module. Patches
for wi(4) are forthcoming.
a different BSS, because that keeps drivers like atw from detecting
ad hoc beacons with the same SSID but different BSSID for the
purpose of IBSS merges.
This should be revisited: maybe drivers should check for beacons
before handing packets up with ieee80211_input(). However, this
restores the atw(4) to working like it did with the old 802.11
layer, and it *is* nice to re-use the 802.11 layer's packet-decode
& -dispatch code (i.e., the ic_recv_mgmt callback).
* Add Kevin Lahey's power-saving support from the old 802.11 layer
* Support for frequency-hopping PHYs
* Add support frequency-hopping PHY mode, IFM_IEEE80211_FH
* Add channel flags for frequency-hopping
* Add mode<->media mappings in for FH PHY in ieee80211_media2rate
and ieee80211_rate2media
* Stop using IFM_MAKEMODE macro since the mode constants
(e.g., IFM_IEEE80211_11A) are pre-shifted in sys/net/if_media.h
* Add some PLCP constants.
* Add Kevin Lahey's power-saving support from the old 802.11 layer
* Add a FHPARMS or DSPARMS info element to probe responses and beacons
as appropriate.
* Add Kevin Lahey's power-saving support from the old 802.11 layer
* Add my stop-gap rate-selection routine, ieee80211_get_rate,
from the old 802.11 layer
* Also from the old 802.11 layer: factor ieee80211_match_bss out
of ieee80211_end_scan, since atw(4) uses it for IBSS merges.
#ifdef __FreeBSD__
/* FreeBSDism */
#else
/* NetBSDism */
#endif
An important and non-obvious change is in ieee80211_mgmt_output,
#ifdef __FreeBSD__
KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
#endif
Because NetBSD mbufs are not bzero'd like FreeBSD's, we cannot
count on rcvif == NULL.
striving to keep the diffs short and simple.
* Replace FreeBSDisms (e.g. struct arpcom) with conditionally-compiled
NetBSDism (struct ethercom).
* Add compatibility shims in ieee80211_compat.*: provide NetBSD with
if_printf, for example.
* Convert FreeBSD node mutex uses to generic node critical-section
protection (ieee80211_node_critsect_begin, _end), replace
FreeBSD atomic arithmetic with generic alternative, and implement
generics in NetBSD
* Provide NetBSD-style 802.11 ioctls
* Style nits
