This function is meant to supercede a similar function in ie.c. The
current approach results in very optimistic data rate estimates since it
only takes into account the VHT/HT Capabilities IEs. It does not take
into account any local hardware limitations (such as no VHT/HT support),
limited RX MCS sets & number of spatial streams. It also does not take
into account that the AP might not be actually operating on higher
bandwidth channels.
This function is meant to address that by matching peer TX MCS sets with
the local hardware RX MCS set capability. It also takes into account
channel bandwidth capabilities of the local hardware, as well as whether
the AP is actually operating on a wider channel.
Move the band definition out of wiphy.c and into band.[ch]. This is
done to make certain utilities that depend on band information capable
of being tested from unit tests.
The band concept will most likely grow over time. For now, the only
user will be wiphy.c and unit tests, so the structures are kept public.
It is possible that the address set command succeeds just after a
netconfig object has been destroyed.
==6485== Invalid read of size 8
==6485== at 0x458A6D: netconfig_ipv4_routes_install (netconfig.c:629)
==6485== by 0x458D1C: netconfig_ipv4_ifaddr_add_cmd_cb (netconfig.c:689)
==6485== by 0x4A5E7B: process_message (netlink.c:181)
==6485== by 0x4A626A: can_read_data (netlink.c:289)
==6485== by 0x4A3E19: io_callback (io.c:120)
==6485== by 0x4A27B5: l_main_iterate (main.c:478)
==6485== by 0x4A28F6: l_main_run (main.c:525)
==6485== by 0x4A2C0E: l_main_run_with_signal (main.c:647)
==6485== by 0x404D27: main (main.c:542)
==6485== Address 0x4a47290 is 32 bytes inside a block of size 104 free'd
==6485== at 0x48399CB: free (vg_replace_malloc.c:538)
==6485== by 0x49998B: l_free (util.c:136)
==6485== by 0x457699: netconfig_free (netconfig.c:130)
==6485== by 0x45A038: netconfig_destroy (netconfig.c:1163)
==6485== by 0x41FD16: station_free (station.c:3613)
==6485== by 0x42020E: station_destroy_interface (station.c:3710)
==6485== by 0x4B990E: interface_instance_free (dbus-service.c:510)
==6485== by 0x4BC193: _dbus_object_tree_remove_interface (dbus-service.c:1694)
==6485== by 0x4BA22A: _dbus_object_tree_object_destroy (dbus-service.c:795)
==6485== by 0x4B078D: l_dbus_unregister_object (dbus.c:1537)
==6485== by 0x417ACB: device_netdev_notify (device.c:361)
==6485== by 0x4062B6: netdev_free (netdev.c:808)
==6485== Block was alloc'd at
==6485== at 0x483879F: malloc (vg_replace_malloc.c:307)
==6485== by 0x499857: l_malloc (util.c:62)
==6485== by 0x459DC0: netconfig_new (netconfig.c:1115)
==6485== by 0x41FC29: station_create (station.c:3592)
==6485== by 0x4207B3: station_netdev_watch (station.c:3864)
==6485== by 0x411A17: netdev_initial_up_cb (netdev.c:5588)
==6485== by 0x4A5E7B: process_message (netlink.c:181)
==6485== by 0x4A626A: can_read_data (netlink.c:289)
==6485== by 0x4A3E19: io_callback (io.c:120)
==6485== by 0x4A27B5: l_main_iterate (main.c:478)
==6485== by 0x4A28F6: l_main_run (main.c:525)
==6485== by 0x4A2C0E: l_main_run_with_signal (main.c:647)
==6485==
netdev_free relies on netdev->connected being set to detect whether a
connection is in progress. This variable is only set once the driver
has been connected however, so for situations where a CMD_CONNECT is
still 'in flight' or if the wiphy work is still pending, the ongoing
connection will not be canceled. Fix that by being more thorough when
trying to detect that a connection is in progress.
src/wiphy.c:wiphy_radio_work_next() Starting work item 2
Terminate
src/netdev.c:netdev_free() Freeing netdev wlan0[9]
src/device.c:device_free()
src/station.c:station_free()
src/netconfig.c:netconfig_destroy()
Removing scan context for wdev c
src/scan.c:scan_context_free() sc: 0x4a44c80
src/netdev.c:netdev_mlme_notify() MLME notification New Station(19)
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
==6356== Invalid write of size 4
==6356== at 0x40A253: netdev_cmd_connect_cb (netdev.c:2522)
==6356== by 0x4A8886: process_unicast (genl.c:986)
==6356== by 0x4A8C48: received_data (genl.c:1098)
==6356== by 0x4A3DFD: io_callback (io.c:120)
==6356== by 0x4A2799: l_main_iterate (main.c:478)
==6356== by 0x4A28DA: l_main_run (main.c:525)
==6356== by 0x4A2BF2: l_main_run_with_signal (main.c:647)
==6356== by 0x404D27: main (main.c:542)
==6356== Address 0x4a3e418 is 152 bytes inside a block of size 472 free'd
==6356== at 0x48399CB: free (vg_replace_malloc.c:538)
==6356== by 0x49996F: l_free (util.c:136)
==6356== by 0x406662: netdev_free (netdev.c:886)
==6356== by 0x4129C2: netdev_shutdown (netdev.c:5980)
==6356== by 0x403A14: iwd_shutdown (main.c:79)
==6356== by 0x403A7D: signal_handler (main.c:90)
==6356== by 0x4A2AFB: sigint_handler (main.c:612)
==6356== by 0x4A2F3B: handle_callback (signal.c:78)
==6356== by 0x4A3030: signalfd_read_cb (signal.c:104)
==6356== by 0x4A3DFD: io_callback (io.c:120)
==6356== by 0x4A2799: l_main_iterate (main.c:478)
==6356== by 0x4A28DA: l_main_run (main.c:525)
==6356== Block was alloc'd at
==6356== at 0x483879F: malloc (vg_replace_malloc.c:307)
==6356== by 0x49983B: l_malloc (util.c:62)
==6356== by 0x4121BD: netdev_create_from_genl (netdev.c:5776)
==6356== by 0x451F6F: manager_new_station_interface_cb (manager.c:173)
==6356== by 0x4A8886: process_unicast (genl.c:986)
==6356== by 0x4A8C48: received_data (genl.c:1098)
==6356== by 0x4A3DFD: io_callback (io.c:120)
==6356== by 0x4A2799: l_main_iterate (main.c:478)
==6356== by 0x4A28DA: l_main_run (main.c:525)
==6356== by 0x4A2BF2: l_main_run_with_signal (main.c:647)
==6356== by 0x404D27: main (main.c:542)
If the daemon is started and killed rapidly on startup, it is possible
for netdev_shutdown to be called prior to manager processing messages
that actually create the netdev itself. Since the netdev_list has
already been freed, the storage is lost. Fix that by destroying
netdev_list only when the module is unloaded.
If we're going down, make sure to notify any watches about EVENT_DEL
earlier. Not doing so might result in us not cleaning up requests that
might have been started as the result of this event.
station_free() is invoked when one of two possibilities happen:
- Device has been powered down, and EVENT_DOWN has been emitted
- Device has been removed, and EVENT_DEL has been emitted
In both cases there is not much point for netdev_disconnect to be
invoked as that tries to cleanly shut down an existing connection. The
only thing the ABORTED error accomplishes in this case is to send a
dbus_aborted_error for the pending_connect message, if it exists.
There's already code for doing this in station_free().
src/station.c:station_enter_state() Old State: autoconnect_quick, new state: connecting (auto)
src/scan.c:scan_cancel() Trying to cancel scan id 1 for wdev 7
src/wiphy.c:wiphy_radio_work_done() Work item 1 done
src/wiphy.c:wiphy_radio_work_next() Starting work item 2
Terminate
src/netdev.c:netdev_free() Freeing netdev wlan0[9]
src/device.c:device_free()
src/station.c:station_free()
src/wiphy.c:wiphy_radio_work_done() Work item 2 done
src/station.c:station_connect_cb() 9, result: 5
src/netconfig.c:netconfig_destroy()
Removing scan context for wdev 7
src/scan.c:scan_context_free() sc: 0x4a39490
src/netdev.c:netdev_mlme_notify() MLME notification New Station(19)
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/netdev.c:netdev_mlme_notify() MLME notification Authenticate(37)
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/netdev.c:netdev_mlme_notify() MLME notification Associate(38)
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/netdev.c:netdev_mlme_notify() MLME notification Connect(46)
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/wiphy.c:wiphy_reg_notify() Notification of command Reg Change(36)
src/wiphy.c:wiphy_update_reg_domain() New reg domain country code for (global) is US
src/netdev.c:netdev_link_notify() event 16 on ifindex 9
src/netdev.c:netdev_unicast_notify() Unicast notification 129
src/netdev.c:netdev_mlme_notify() MLME notification Del Station(20)
src/netdev.c:netdev_mlme_notify() MLME notification Deauthenticate(39)
src/netdev.c:netdev_mlme_notify() MLME notification Disconnect(48)
src/wiphy.c:wiphy_reg_notify() Notification of command Reg Change(36)
src/wiphy.c:wiphy_update_reg_domain() New reg domain country code for (global) is XX
==20311== Invalid write of size 4
==20311== at 0x406E74: netdev_cmd_disconnect_cb (netdev.c:1130)
==20311== by 0x4A78A8: process_unicast (genl.c:986)
==20311== by 0x4A7C6A: received_data (genl.c:1098)
==20311== by 0x4A2E1F: io_callback (io.c:120)
==20311== by 0x4A17BB: l_main_iterate (main.c:478)
==20311== by 0x4A18FC: l_main_run (main.c:525)
==20311== by 0x4A1C14: l_main_run_with_signal (main.c:647)
==20311== by 0x404D27: main (main.c:542)
==20311== Address 0x4a37a0c is 156 bytes inside a block of size 472 free'd
==20311== at 0x48399CB: free (vg_replace_malloc.c:538)
==20311== by 0x498991: l_free (util.c:136)
==20311== by 0x406651: netdev_free (netdev.c:883)
==20311== by 0x412976: netdev_shutdown (netdev.c:5970)
==20311== by 0x403A14: iwd_shutdown (main.c:79)
==20311== by 0x403A7D: signal_handler (main.c:90)
==20311== by 0x4A1B1D: sigint_handler (main.c:612)
==20311== by 0x4A1F5D: handle_callback (signal.c:78)
==20311== by 0x4A2052: signalfd_read_cb (signal.c:104)
==20311== by 0x4A2E1F: io_callback (io.c:120)
==20311== by 0x4A17BB: l_main_iterate (main.c:478)
==20311== by 0x4A18FC: l_main_run (main.c:525)
The data rate estimation belongs in wiphy since it should take hardware
capabilities into account. Right now the data rate calculation simply
assumes the hardware is as capable as the AP. scan.c will be ported to
use this utility and the data rate estimation will be expanded to take
wiphy capabilities into account.
scan_parse_result used to parse the wdev and return this to the caller
where it was compared against the expected wdev. Simplify this by
extract the wdev first, and proceeding with the bss parsing afterwards.
Right now a very limited set of band parameters are parsed into wiphy.
This includes the supported rates and the supported frequencies.
However, there is much more information that is given for each band.
Introduce a new band object that will store this information and can be
extended for future use.
Change the char *addr_str and uint8_t prefix_len pair to an
l_rtnl_address object and use ell/rtnl.h utilities that use that
directly. Extend broadcast_from_ip to handle prefix_len.
We generate the DBus error reply type from the errno only when
ap_start() was failing synchronously, now also send the errno through
the callbacks so that we can also return a specific DBus reply when
failing asynchronously. Thea AP autotest relies on receiving the
AlreadyExists DBus error.
Deprecate the global [General].APRanges setting in favour of
[IPv4].APAddressPool with an extended (but backwards-compatible) syntax.
Drop the existing address pool creation code.
The new APAddressPool setting has the same syntax as the profile-local
[IPv4].Address setting and the subnet selection code will fall back
to the global setting if it's missing, this way we use common code to
handle both settings.
Extend the [IPv4].Address setting's syntax to allow a new format: a list
of <IP>/<prefix_len> -form strings that define the address space from
which a subnet is selected. Rewrite the DHCP settings loading with
other notable changes:
* validate some of the settings more thoroughly,
* name all netconfig-related ap_state members with the netconfig_
prefix,
* make sure we always call l_dhcp_server_set_netmask(),
* allow netmasks other than 24-bit and change the default to 28 bits,
* as requested avoid using the l_net_ ioctl-based functions although
l_dhcp still uses them internally,
* as requested avoid touching the ap_state members until the end of
some functions so that on error they're basically a no-op (for
readability).
Add the ip_pool_select_addr4 function to select a random subnet of requested
size from an address space defined by a string list (for use with the
AP profile [IPv4].Address and the global [IPv4].APAddressPool settings),
avoiding those subnets that conflict with subnets in use. We take care
to give a similar weight to all subnets contained in the specified
ranges regardless of how many ranges contain each, basically so that
overlapping ranges don't affect the probabilities (debatable.)
Add the ip-pool submodule that tracks IPv4 addresses in use on the
system for use when selecting the address for a new AP. l_rtnl_address
is used internally because if we're going to return l_rtnl_address
objects it would be misleading if we didn't fill in all of their
properties like flags etc.
If the connected BSS changes channel, netdev will emit an event with the
new channel's frequency. In response, have station change the frequency
of the connected scan_bss struct and inform network about the update.
If the connected BSS announces that it is switching operating channel,
the kernel may emit the NL80211_CMD_CH_SWTICH_NOTIFY event when the
switch is complete. Add a new netdev event NETDEV_EVENT_CHANNEL_SWITCHED
to signal to interested modules that the connected BSS has changed
channel. The event carries a pointer to the new channel's frequency.
NL80211_BSS_LAST_SEEN_BOOTTIME is expressed in nanoseconds, while BSS
timestamps are expressed in microseconds internally. Convert the
attribute to microseconds when using it to timestamp a BSS. This makes
iwd expire absent BSSes within 30 seconds as intended.
Fixes: 454cee12d4 ("scan: Use kernel-reported time-stamp if provided")
Right now, if a connection to a network selected by auto-connect fails,
the entire autoconnect process is restarted. This means that scans are
kicked off again, auto-connect list is rebuilt, etc. This was due to
auto-connect reusing the same failure path as connections triggered via
D-Bus.
The above behavior can lead to weird situations in certain corner cases.
For example, a highly preferred network configured with the wrong
password would result in auto-connect entering an infinite loop.
Fix this by making sure that all auto-connect entries are tried and
exhausted prior to re-scanning again.
The temporary ban list is cleared when a network is connected to
successfully, and also in network_connect_failed. Unfortunately,
network_connect_failed is not called in all paths (i.e. during
autoconnect) since it messes with the state of secrets and passphrases.
Clear the list in network_disconnected() instead, since it is guaranteed
to be called in every circumstance.
This will be effectively the same as the CONNECTING state, but can be
used to enable differing behavior, depending on whether connection was
triggered by autoconnect or via D-Bus.
Code that walked the VHT TX/RX MCS maps seemed to assume that bit_field
operated on bits that start at '1'. But this utility actually operates
on bits that start at '0'. I.e. the least significant bit is at
position 0.
While we're at it, rename the mcs variable into bitoffset to make it
clearer how the maps are being iterated over. Supported MCS is actually
the value found in the map.
This option has not been used in a very long time, and is of limited
utility since the only thing D-Bus debugging does is hexdumps the
content of D-Bus messages to the terminal.
The current calculation was giving erroneous results when it came to VHT
MCS index 4 and VHT MCS index 8 & 9.
Switch to a precomputed look up table and add a multiplication factor
for short GI.
ap_reset() seems to be called whenever the AP is stopped or removed due
to interface shutdown. For some reason ap_reset did not remove the DHCP
server object, resulting in leaks:
==211== at 0x483879F: malloc (vg_replace_malloc.c:307)
==211== by 0x46B5AD: l_malloc (util.c:62)
==211== by 0x49B0E2: l_dhcp_server_new (dhcp-server.c:715)
==211== by 0x433AA3: ap_setup_dhcp (ap.c:2615)
==211== by 0x433AA3: ap_load_dhcp (ap.c:2645)
==211== by 0x433AA3: ap_load_config (ap.c:2753)
==211== by 0x433AA3: ap_start (ap.c:2885)
==211== by 0x434A96: ap_dbus_start_profile (ap.c:3329)
==211== by 0x482DA9: _dbus_object_tree_dispatch (dbus-service.c:1815)
==211== by 0x47A4D9: message_read_handler (dbus.c:285)
==211== by 0x4720EB: io_callback (io.c:120)
==211== by 0x47130C: l_main_iterate (main.c:478)
==211== by 0x4713DB: l_main_run (main.c:525)
==211== by 0x4713DB: l_main_run (main.c:507)
==211== by 0x4715EB: l_main_run_with_signal (main.c:647)
==211== by 0x403EE1: main (main.c:550)
==209== by 0x43E48A: netconfig_ipv4_select_and_install (netconfig.c:887)
==209== by 0x43E48A: netconfig_configure (netconfig.c:1025)
==209== by 0x41743C: station_connect_cb (station.c:2556)
==209== by 0x408E0D: netdev_connect_ok (netdev.c:1311)
==209== by 0x47549E: process_unicast (genl.c:994)
==209== by 0x47549E: received_data (genl.c:1102)
==209== by 0x4720EB: io_callback (io.c:120)
==209== by 0x47130C: l_main_iterate (main.c:478)
==209== by 0x4713DB: l_main_run (main.c:525)
==209== by 0x4713DB: l_main_run (main.c:507)
==209== by 0x4715EB: l_main_run_with_signal (main.c:647)
==209== by 0x403EE1: main (main.c:550)
Prior to the BSS blacklist a BSS based autoconnect list made
the most sense, but now station actually retries all BSS's upon
failure. This means that for each BSS in the autoconnect list
every other BSS under that SSID will be attempted to connect to
if there is a failure. Essentially this is a network based
autoconnect list, just an indirect way of doing it.
Intead the autoconnect list can be purely network based, using
the network rank for sorting. This avoids the need for a special
autoconnect_entry struct as well as ensures the last connected
network is chosen first (simply based on existing network ranking
logic).
