This mispelling was present in the configuration, so I retained parsing
of the legacy BandModifier*Ghz options for compatibility. Without this
change anyone spelling GHz correctly in their configs would be very
confused.
The function wiphy_band_is_disabled() return was a bit misleading
because if the band was not supported it would return true which
could be misunderstood as the band is supported, but disabled.
There was only one call site and because of this behavior
wiphy_band_is_disabled needed to be paired with checking if the
band was supported.
To be more descriptive to the caller, wiphy_band_is_disabled() now
returns an int and if the band isn't supported -ENOTSUP will be
returned, otherwise 1 is returned if the band is disabled and 0
otherwise.
This is more or less copied from scan_get_allowed_freqs but is
going to be needed by station (basically just saves the need for
station to do the same clone/constrain sequence itself).
One slight alteration is now a band mask can be passed in which
provides more flexibility for additional filtering.
The loop iterating the frequency attributes list was not including
the entire channel set since it was stopping at i < band->freqs_len.
The freq_attrs array is allocated to include the last channel:
band->freq_attrs = l_new(struct band_freq_attrs, num_channels + 1);
band->freqs_len = num_channels;
So instead the for loop should use i <= band->freqs_len. (I also
changed this to start the loop at 1 since channel zero is invalid).
Certain drivers do not handle power save very well resulting in
missed frames, firmware crashes, or other bad behavior. Its easy
enough to disable power save via iw, iwconfig, etc but since IWD
removes and creates the interface on startup it blows away any
previous power save setting. The setting must be done *after* IWD
creates the interface which can be done, but needs to be via some
external daemon monitoring IWD's state. For minimal systems,
e.g. without NetworkManager, it becomes difficult and annoying to
persistently disable power save.
For this reason a new driver flag POWER_SAVE_DISABLE is being
added. This can then be referenced when creating the interfaces
and if set, disable power save.
The driver_infos list in wiphy.c is hard coded and, naturally,
not configurable from a user perspective. As drivers are updated
or added users may be left with their system being broken until the
driver is added, IWD released, and packaged.
This adds the ability to define driver flags inside main.conf under
the "DriverQuirks" group. Keys in this group correspond to values in
enum driver_flag and values are a list of glob matches for specific
drivers:
[DriverQuirks]
DefaultInterface=rtl81*,rtl87*,rtl88*,rtw_*,brcmfmac,bcmsdh_sdmmc
ForcePae=buggy_pae_*
Rather than keep a pointer to the driver_info entry copy the flags
into the wiphy object. This preps for supporting driver flags via
a configuration file, specifically allowing for entries that are a
subset of others. For example:
{ "rtl88*", DEFAULT_IF },
{ "rtl88x2bu", FORCE_PAE },
Before it was not possible to add entires like this since only the
last entry match would get set. Now DEFAULT_IF would get set to all
matches, and FORCE_PAE to only rtl88x2bu. This isn't especially
important for the static list since it could be modified to work
correctly, but will be needed when parsing flags from a
configuration file that may contain duplicates or subsets of the
static list.
In some situations its convenient for the same work item to be
inserted (rescheduled) while its in progress. FT for example does
this now if a roam fails. The same ft_work item gets re-inserted
which, currently, is not safe to do since the item is modified
and removed once completed.
Fix this by introducing wiphy_radio_work_reschedule which is an
explicit API for re-inserting work items from within the do_work
callback.
The wiphy work logic was changed around slightly to remove the item
at the head of the queue prior to starting and note the ID going
into do_work. If do_work signaled done and ID changed we know it
was re-inserted and can skip the destroy logic and move onto the
next item. If the item is not done continue as normal but set the
priority to INT_MIN, as usual, to prevent other items from getting
to the head of the queue.
Since channels numbers are used as indexes into the array, and given
that channel numbers start at '1' instead of 0, make sure to allocate a
buffer large enough to not overflow when the max channel number for a
given band is accessed.
src/manager.c:manager_wiphy_dump_callback() New wiphy phy1 added (1)
==22290== Invalid write of size 2
==22290== at 0x4624B2: nl80211_parse_supported_frequencies (nl80211util.c:570)
==22290== by 0x417CA5: parse_supported_bands (wiphy.c:1636)
==22290== by 0x418594: wiphy_parse_attributes (wiphy.c:1805)
==22290== by 0x418E20: wiphy_update_from_genl (wiphy.c:1991)
==22290== by 0x464589: manager_wiphy_dump_callback (manager.c:564)
==22290== by 0x4CBDDA: process_unicast (genl.c:944)
==22290== by 0x4CC19C: received_data (genl.c:1056)
==22290== by 0x4C7140: io_callback (io.c:120)
==22290== by 0x4C5A97: l_main_iterate (main.c:476)
==22290== by 0x4C5BDC: l_main_run (main.c:523)
==22290== by 0x4C5F0F: l_main_run_with_signal (main.c:645)
==22290== by 0x40503B: main (main.c:600)
==22290== Address 0x4aa76ec is 0 bytes after a block of size 28 alloc'd
==22290== at 0x48417B5: malloc (vg_replace_malloc.c:393)
==22290== by 0x4BC4D1: l_malloc (util.c:62)
==22290== by 0x417BE4: parse_supported_bands (wiphy.c:1619)
==22290== by 0x418594: wiphy_parse_attributes (wiphy.c:1805)
==22290== by 0x418E20: wiphy_update_from_genl (wiphy.c:1991)
==22290== by 0x464589: manager_wiphy_dump_callback (manager.c:564)
==22290== by 0x4CBDDA: process_unicast (genl.c:944)
==22290== by 0x4CC19C: received_data (genl.c:1056)
==22290== by 0x4C7140: io_callback (io.c:120)
==22290== by 0x4C5A97: l_main_iterate (main.c:476)
==22290== by 0x4C5BDC: l_main_run (main.c:523)
==22290== by 0x4C5F0F: l_main_run_with_signal (main.c:645)
==22290==
With really badly timed events a wiphy can be registered twice. This
happens when IWD starts and requests a wiphy dump. Immediately after
a NEW_WIPHY event comes in (presumably when the driver loads) which
starts another dump. The NEW_WIPHY event can't simply be ignored
since it could be a hotplug (e.g. USB card) so to fix this we can
instead just prevent it from being registered.
This does mean both dumps will happen but the information will just
be added to the same wiphy object.
This adds some additional parsing to obtain the AMPDU parameter
byte as well as wiphy_get_ht_capabilities() which returns the
complete IE (combining the 3 separate kernel attributes).
The disabled_freqs list is being removed and replaced with a new
list in the band object. This completely removes the need for
the pending_freqs list as well since any regdom related dumps
can just overwrite the existing frequency list.
This adds two new APIs:
wiphy_get_frequency_info(): Used to get information about a given
frequency such as disabled/no-IR. This can also be used to check
if the frequency is supported (NULL return is unsupported).
wiphy_band_is_disabled(): Checks if a band is disabled. Note that
an unsupported band will also return true. Checking support should
be done with wiphy_get_supported_bands()
As additional frequency info is needed it doesn't make sense to
store a full list of frequencies for every attribute (i.e.
supported, disabled, no-IR, etc).
This changes nl80211_parse_supported_frequencies to take a list
of frequency attributes where each index corresponds to a channel,
and each value can be filled with flag bits to signal any
limitations on that frequency.
wiphy.c then had to be updated to use this rather than the existing
scan_freq_set lists. This, as-is, will break anything using
wiphy_get_disabled_freqs().
wiphy_get_supported_rates expected an enum defined in the nl80211
header but the argument type was an unsigned int, not exactly
intuitive to anyone using the API. Since the nl80211 enum value
was only used in a switch statement it could just as well be IWD's
internal enum band_freq.
This also allows modules which do not reference nl80211.h to use
wiphy_get_supported_rates().
Parse the AP probe response offload attribute during the dump. If
set this indicates the driver expects the probe response attribute
to be included with START_AP.
For whatever reason the kernel will send regdom updates even if
the regdom didn't change. This ends up causing wiphy to dump
which isn't needed since there should be no changes in disabled
frequencies.
Now the previous country is checked against the new one, and if
they match the wiphy is not dumped again.
A change in regulatory domain can result in frequencies being
enabled or disabled depending on the domain. This effects the
frequencies stored in wiphy which other modules depend on
such as scanning, offchannel work etc.
When the regulatory domain changes re-dump the wiphy in order
to update any frequency restrictions.
A helper to check whether the country code corresponds to a
real country, or some special code indicating the country isn't
yet set. For now, the special codes are OO (world roaming) and
XX (unknown entity).
The compiler treated the '1' as an int type which was not big enough
to hold a bit shift of 31:
runtime error: left shift of 1 by 31 places cannot be represented in
type 'int'
Instead of doing the iftype check manually, refactor
wiphy_get_supported_iftypes by adding a subroutine which just parses
out iftypes from a mask into a char** list. This removes the need to
case each iftype into a string.
If a frequency is disabled IWD should keep track and disallow any
operations on that channel such as scanning. A new list has been added
which contains only disabled frequencies.
There appears to be a compiler bug with gcc 11.2 which thinks the vht_mcs_set
is a zero length array, and the memset of size 8 is out of bounds. This is only
seen once an element is added to 'struct band'.
In file included from /usr/include/string.h:519,
from src/wiphy.c:34:
In function ‘memset’,
inlined from ‘band_new_from_message’ at src/wiphy.c:1300:2,
inlined from ‘parse_supported_bands’ at src/wiphy.c:1423:11,
inlined from ‘wiphy_parse_attributes’ at src/wiphy.c:1596:5,
inlined from ‘wiphy_update_from_genl’ at src/wiphy.c:1773:2:
/usr/include/bits/string_fortified.h:59:10: error: ‘__builtin_memset’ offset [0, 7] is out of the bounds [0, 0] [-Werror=array-bounds]
59 | return __builtin___memset_chk (__dest, __ch, __len,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
60 | __glibc_objsize0 (__dest));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~
The HE capabilities information is contained in
NL80211_BAND_ATTR_IFTYPE_DATA where each entry is a set of attributes
which define the rules for one or more interface types. This patch
specifically parses the HE PHY and HE MCS data which will be used for
data rate estimation.
Since the set of info is per-iftype(s) the data is stored in a queue
where each entry contains the PHY/MCS info, and a uint32 bit mask where
each bit index signifies an interface type.
With the addition of HE, the print function for MCS sets needs to change
slightly. The maps themselves are the same format, but the values indicate
different MCS ranges. Now the three MCS max values are passed in.
Ronan Pigott