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Commit Graph

3104 Commits

Author SHA1 Message Date
James Prestwood
997c54f185 wiphy: check SAE offload in wiphy_can_connect
This allows this wiphy_can_connect to pass for an SAE BSS
if the hardware does not support user space SAE, but does
support SAE offload.
2021-03-22 14:14:16 -05:00
James Prestwood
3e3ef284de wiphy: check SAE offload in wiphy_select_akm
This allows an SAE AKM to be selected if the hardware does not
support SAE in userspace, but does support SAE offload.
2021-03-22 14:12:50 -05:00
James Prestwood
af3d0d21a0 wiphy: add getter for 'supports_cmds_auth_assoc' 2021-03-22 14:12:32 -05:00
James Prestwood
5033b5a24d netdev: parse SIGNAL_AVG when building diagnostics object 2021-03-16 11:25:53 -05:00
James Prestwood
fb0a1fba2a diagnostic: include AverageRSSI in GetDiagnostics 2021-03-16 11:25:39 -05:00
James Prestwood
2b5e566c9d station: use network_bss_update
This fixes a dangling pointer in network where station was
freeing the scan_bss but network still had a pointer to it
in its own bss_list.
2021-03-15 14:47:42 -05:00
James Prestwood
4577ee01f2 network: replace l_queue_get_entries loop
After adding network_bss_update, network now has a match_addr
queue function which can be used to replace an unneeded
l_queue_get_entries loop with l_queue_find.
2021-03-15 14:47:30 -05:00
James Prestwood
88d0a6a7c0 network: add network_bss_update
This will swap out a scan_bss object with a duplicate that may
exist in a networks bss_list. The duplicate will be removed by
since the object is owned by station it is assumed that it will
be freed elsewhere.
2021-03-15 14:47:07 -05:00
James Prestwood
97de24e694 station: disable roaming logic for auto-roaming cards
If the hardware roams automatically we want to be sure to not
react to CQM events and attempt to roam/disconnect on our own.

Note: this is only important for very new kernels where CQM
events were recently added to brcmfmac.
2021-03-15 13:32:35 -05:00
James Prestwood
2a46ab3042 wiphy: parse NL80211_ATTR_ROAM_SUPPORT flag
This tells us if the hardware is going to automatically
roam. We need this to know if station roaming logic should
be disabled.
2021-03-15 13:32:08 -05:00
James Prestwood
133347440e netdev: station: support full mac roaming
Roaming on a full mac card is quite different than soft mac
and needs to be specially handled. The process starts with
the CMD_ROAM event, which tells us the driver is already
roamed and associated with a new AP. After this it expects
the 4-way handshake to be initiated. This in itself is quite
simple, the complexity comes with how this is piped into IWD.

After CMD_ROAM fires its assumed that a scan result is
available in the kernel, which is obtained using a newly
added scan API scan_get_firmware_scan. The only special
bit of this is that it does not 'schedule' a scan but simply
calls GET_SCAN. This is treated special and will not be
queued behind any other pending scan requests. This lets us
reuse some parsing code paths in scan and initialize a
scan_bss object which ultimately gets handed to station so
it can update connected_bss/bss_list.

For consistency station must also transition to a roaming state.
Since this roam is all handled by netdev two new events were
added, NETDEV_EVENT_ROAMING and NETDEV_EVENT_ROAMED. Both allow
station to transition between roaming/connected states, and ROAMED
provides station with the new scan_bss to replace connected_bss.
2021-03-15 13:14:39 -05:00
James Prestwood
e8c87c8b42 scan: add scan_get_firmware_scan
Adds support for getting firmware scan results from the kernel.
This is intended to be used after the firmware roamed automatically
and the scan result is require for handshake initialization.

The scan 'request' is competely separate from the normal scan
queue, though scan_results, scan_request, and the scan_context
are all used for consistency and code reuse.
2021-03-15 13:14:16 -05:00
Denis Kenzior
0c0d9e5696 iwd: Use test_bit from ell 2021-03-12 13:49:23 -06:00
Denis Kenzior
f51025e143 util: Remove unused util_bit_field 2021-03-11 22:35:13 -06:00
Denis Kenzior
74ec6530cb eap-pwd: Use bit_field from ell 2021-03-11 22:35:03 -06:00
Denis Kenzior
113c1086e2 fils: Use bit_field from ell 2021-03-11 22:34:26 -06:00
Denis Kenzior
d60c58f595 ie: Use bit_field from ell 2021-03-11 22:33:21 -06:00
Denis Kenzior
3dae0592b0 eapol: Use bit_field from ell 2021-03-11 22:33:06 -06:00
Denis Kenzior
a941d4169f util: Remove unused util_set_bit 2021-03-11 22:24:05 -06:00
Denis Kenzior
666402870e wiphy: Use ell's set_bit 2021-03-11 22:23:52 -06:00
Denis Kenzior
17cf4da726 build: Add useful.h to files that use minsize
Now that minsize has been moved out of ell/util.h to ell/minsize.h
2021-03-11 21:55:57 -06:00
Andrew Zaborowski
926ab2accf p2p: Build P2P and WFD IEs for group's management frames
Register P2P group's vendor IE writers using the new API to build and
attach the necessary P2P IE and WFD IEs to the (Re)Association Response,
Probe Response and Beacon frames sent by the GO.
2021-03-11 21:49:23 -06:00
Andrew Zaborowski
a6b7624033 p2p: Parse P2P IEs and WFD IEs in Association Requests
Roughly validate the IEs and save some information for use in our own
IEs. p2p_extract_wfd_properties and p2p_device_validate_conn_wfd are
being moved unchanged to be usable in p2p_group_event without forward
declarations and to be next to p2p_build_wfd_ie.
2021-03-11 21:48:43 -06:00
Andrew Zaborowski
f868c2989c ap: Handle most WSC IEs using ap_write_extra_ies
Make the WSC IE processing and writing more self-contained (i.e. so that
it can be more easily moved to a separate file if desired) by using the
new ap_write_extra_ies() mechanism.
2021-03-11 21:47:05 -06:00
Andrew Zaborowski
18a63f91fd ap: Write extra frame IEs from the user
Add an API for the ap.h users to add extra IEs to outgoing management
frames: beacons, etc.
2021-03-11 21:46:49 -06:00
Denis Kenzior
f7b5bd4a79 treewide: Use ell's useful.h header 2021-03-11 21:46:09 -06:00
Andrew Zaborowski
c19fd0ee78 ap: Pass frame IEs from clients to the ap_state user
Pass the string IEs from the incoming STA association frames to
the user in the AP event data.  I drop
ap_event_station_added_data.rsn_ie because that probably wasn't
going to ever be useful and the RSN IE is included in the .assoc_ies
array in any case.
2021-03-10 16:42:03 -06:00
Andrew Zaborowski
71ba94121d ap: Make ap_update_beacon public
Let users call ap_update_beacon when a value has changed which should be
reflected in the beacon IEs.
2021-03-10 16:42:01 -06:00
James Prestwood
bc3d285c5e netdev: use NL80211_STA_INFO_SIGNAL rather than average
Since GET_STATION (and in turn GetDiagnostics) gets the most
current station info this attribute serves as a better indication
of the current signal strength. In addition full mac cards don't
appear to always have the average attribute.
2021-03-10 15:10:41 -06:00
James Prestwood
f89270325f nl80211util: add WIPHY_FREQ to parse_attrs support 2021-03-10 15:08:19 -06:00
Denis Kenzior
0ba0418b53 iwd: remove uninitialized_var
No instances of this macro now exist.  If future instances crop up, the
better approach would be to use pragma directives to quiet such warnings
and allow static analysis to catch any issues.
2021-03-10 12:05:43 -06:00
Denis Kenzior
07eea03cca eap: Rework handle_response logic
Expanded packets with a 0 vendor id need to be treated just like
non-expanded ones.  This led to very nasty looking if statements
throughout this function.  Fix that by introducing a nested function
to take care of the response type normalization.  This also allows us to
drop uninitialized_var usage.
2021-03-10 12:03:49 -06:00
Denis Kenzior
a483ec7b68 eap: Fix Expanded Nak processing
Expanded Nak packet contains (possibly multiple) 8 byte chunks that
contain the type (1 byte, always '254') vendor-id (3 bytes) and
vendor-type (4) bytes.

Unfortunately the current logic was reading the vendor-id at the wrong
offset (0 instead of 1) and so the extracted vendor-type was incorrect.

Fixes: 17c569ba4c ("eap: Add authenticator method logic and API")
2021-03-09 18:28:42 -06:00
Denis Kenzior
28e58887ec eap: Don't try to pass NAKs into eap_type_to_str
If we received a Nak or an Expanded Nak packet, the intent was to print
our own method type.  Instead we tried to print the Nak type contents.
Fix that by always passing in our method info to eap_type_to_str.

Fixes: 17c569ba4c ("eap: Add authenticator method logic and API")
2021-03-09 18:25:51 -06:00
Denis Kenzior
7de5b4adef treewide: replace util_mem_is_zero with l_memeqzero 2021-03-09 15:40:35 -06:00
Denis Kenzior
a2926bd3ed watchlist: Remove '__' prefix from static functions
The '__' prefix is meant for private, semi-private,
inner implementation or otherwise special APIs that
are typically exposed in a header.  In the case of watchlist, these
functions were static and do not fit the above description.  Remove the
__ prefix accordingly.
2021-03-09 15:28:36 -06:00
Andrew Zaborowski
3621e998c9 ap: Add missing ap_config_free() in error path 2021-03-05 16:20:30 -06:00
Andrew Zaborowski
e714e72e05 utils: Add util_netmask_from_prefix 2021-02-26 11:01:03 -06:00
Andrew Zaborowski
b689100c1c ap: Print error messages in dhcp_load_settings 2021-02-26 11:00:25 -06:00
Andrew Zaborowski
cdb2c2b3e3 ap: Fix an inet_aton error check
inet_aton returns 0 on error, not a negative number.
2021-02-26 10:59:35 -06:00
Andrew Zaborowski
fd934aa39e ap: Don't use L_AUTO_FREE_VAR with l_settings
L_AUTO_FREE_VAR only causes l_free to be called on the variable that is
freed and may leak the rest of the l_settings object's memory.
2021-02-26 10:59:22 -06:00
Marcel Holtmann
25ec652423 manager: If driver is not provided, then use default interfaces 2021-02-18 21:43:56 +01:00
Andrew Zaborowski
e8ad4f10b0 ap: Drop an outdated TODO comment 2021-02-18 14:00:30 -06:00
Alvin Šipraga
6b6d0de163 doc: describe InitialPeriodicScanInterval setting 2021-02-12 09:57:10 -06:00
Alvin Šipraga
ff82133050 scan: add InitialPeriodicScanInterval setting 2021-02-12 09:57:10 -06:00
Alvin Šipraga
2df581d1ff doc: describe MaximumPeriodicScanIntervalSetting 2021-02-12 09:57:10 -06:00
Alvin Šipraga
88f2b44bba scan: add MaximumPeriodicScanInterval setting 2021-02-12 09:57:10 -06:00
Daniel Lin
c68e9fc0a6 resolve: configure systemd-resolved's MulticastDNS= setting
When using iwd.conf:[General].EnableNetworkConfiguration=true, it is not
possible to configure systemd.network:[Network].MulticastDNS= as
systemd-networkd considers the link to be unmanaged. This patch allows
iwd to configure that setting on systemd-resolved directly.
2021-02-11 15:06:01 -06:00
James Prestwood
6421b3c5c1 netdev: always register for single CQM threshold
If the extended feature for CQM levels was not supported no CQM
registration would happen, not even for a single level. This
caused IWD to completely lose the ability to roam since it would
only get notified when the kernel was disconnecting, around -90
dBm, not giving IWD enough time to roam.

Instead if the extended feature is not supported we can still
register for the event, just without multiple signal levels.
2021-02-10 12:09:28 -06:00
Andrew Zaborowski
0b5e7ab7bb crypto: Check for l_cipher_decrypt error 2021-02-10 11:56:24 -06:00
Denis Kenzior
f0d811b79c backtrace: Avoid null-dereferencing strchr result 2021-02-09 10:30:48 -06:00
Denis Kenzior
fa9ae4acb7 scan: Put an upper bound on the scan interval 2021-02-09 09:31:05 -06:00
James Prestwood
6930987aa6 network: free psk on error 2021-02-08 16:10:21 -06:00
Denis Kenzior
0854592cc6 p2p: Do not leak 'str'
DeviceType setting is stored in 'str', but is never freed.  Fix that.
2021-02-08 16:02:42 -06:00
Denis Kenzior
2b2b6185e4 eap-tls: Fix potential memory leak
client-cert might be leaked if ClientKey loading fails
2021-02-08 15:56:30 -06:00
Denis Kenzior
f7df7939e6 eap-wsc: Fix possible memory leaks
While parsing WSC registrar settings, the variable 'str' which is used
in multiple areas can be leaked.  Fix that.
2021-02-08 15:46:45 -06:00
James Prestwood
9885568b47 adhoc: fix missing call to va_end
Since only one switch case uses this, va_start/end were just
moved into that case specifically.
2021-02-08 15:16:39 -06:00
Denis Kenzior
6ad50ac49b ap: Make sure strerror argument is positive 2021-02-08 15:05:54 -06:00
James Prestwood
f046bed225 ap: massage code to make static analysis happy
There is no functional change here but checking the return
value makes static analysis much happier. Checking the
return and setting the default inside the if clause is also
consistent with how IWD does it many other places.
2021-02-08 14:24:06 -06:00
James Prestwood
0ae3e1c59d ap: free passphrase on error 2021-02-08 14:23:54 -06:00
Denis Kenzior
fb217479d2 netdev: Scan & Retry CMD_AUTHENTICATE
Handle situations where the BSS we're trying to connect to is no longer
in the kernel scan result cache.  Normally, the kernel will re-scan the
target frequency if this happens on the CMD_CONNECT path, and retry the
connection.

Unfortunately, CMD_AUTHENTICATE path used for WPA3, OWE and FILS does
not have this scanning behavior.  CMD_AUTHENTICATE simply fails with
a -ENOENT error.  Work around this by trying a limited scan of the
target frequency and re-trying CMD_AUTHENTICATE once.
2021-02-08 11:53:29 -06:00
James Prestwood
c026337792 station: move scan cancelation to __station_connect_network
An earlier patch fixed a problem where a queued quick scan would
be triggered and fail once already connected, resulting in a state
transition from connected --> autoconnect_full. This fixed the
Connect() path but this could also happen via autoconnect. Starting
from a connected state, the sequence goes:

 - DBus scan is triggered
 - AP disconnects IWD
 - State transition from disconnected --> autoconnect_quick
 - Queue quick scan
 - DBus scan results come in and used to autoconnect
 - A connect work item is inserted ahead of all others, transition
   from autoconnect_quick --> connecting.
 - Connect completes, transition from connecting --> connected
 - Quick scan can finally get triggered, which the kernel fails to
   do since IWD is connected, transition from connected -->
   autoconnect_full.

This can be fixed by checking for a pending quick scan in the
autoconnect path.
2021-02-04 20:56:34 -06:00
Denis Kenzior
603988476a netdev: Ignore locally generated deauth frames
Fixes: 2bebb4bdc7 ("netdev: Handle deauth frames prior to
association")
2021-02-04 13:54:33 -06:00
Denis Kenzior
0c277e442e station: Remove unneeded logic from dbus_scan_done
Commit eac2410c83 ("station: Take scanned frequencies into account")
has made it unnecessary to explicitly invoke station_set_scan_results
with the expire to true in case a dbus scan finished prematurely or a
subset was not able to be started.  Remove this no-longer needed logic.

Fixes: eac2410c83 ("station: Take scanned frequencies into account")
2021-02-03 14:39:42 -06:00
James Prestwood
c3e160880f station: only add diagnostic interface when connected
The diagnostic interface returns an error anyways if station is
not connected so it makes more sense to only bring the interface
up when its actually usable. This also removes the interface
when station disconnects, which was never done before (the
interface stayed up indefinitely due to a forgotten remove call).
2021-02-03 13:37:19 -06:00
Denis Kenzior
6ced1ec9de station: Use active scan in autoconnect mode
When we're auto-connecting and have hidden networks configured, use
active scans regardless of whether we see any hidden BSSes in our
existing scan results.

This allows us to more effectively see/connect to hidden networks
when first powering up or after suspend.
2021-02-03 13:36:36 -06:00
Denis Kenzior
73309686bd station: Use flush flag for all scans 2021-02-03 13:36:27 -06:00
Denis Kenzior
ab5fd961c8 station: Also reset the SSID when hiding
Make the SSID all zeros when hiding a network.  This makes sure that the
BSS isn't inadvertently confused for a non-hidden one
2021-02-03 13:36:19 -06:00
Denis Kenzior
9af25d937d station: Make sure bss_match also matches the ssid
Kernel might report hidden BSSes that are reported from beacon frames
separately than ones reported due to probe responses.  This may confuse
the station network collation logic since the scan_bss generated by the
probe response might be removed erroneously when processing the scan_bss
that was generated due to a beacon.

Make sure that bss_match also takes the SSID into account and only
matches scan_bss structures that have the same BSSID and SSID contents.
2021-02-03 13:36:09 -06:00
Denis Kenzior
8fd6985214 station: move filtering of non-utf8 scan_bss entries
Instead of silently ignoring entries with non-utf8 SSIDs, drop them from
the new_bss_list entirely.
2021-02-03 13:35:58 -06:00
Denis Kenzior
454cee12d4 scan: Use kernel-reported time-stamp if provided 2021-02-03 13:35:46 -06:00
Denis Kenzior
eac2410c83 station: Take scanned frequencies into account
Instead of manually managing whether to expire BSSes or not, use the
scanned frequency set instead.  This makes the API slightly easier to
understand (dropping two boolean arguments in a row) and also a bit more
future-proof.
2021-02-03 13:35:03 -06:00
Denis Kenzior
ccbd32503b scan: Pass the frequencies scanned to notify cb 2021-02-03 13:34:44 -06:00
Denis Kenzior
4015222f89 scan: Reorganize scan.h to follow coding-style M9 2021-02-03 13:34:37 -06:00
Denis Kenzior
f0e0060ddc scan: Make scan_freq_set_contains const-correct 2021-02-03 13:34:28 -06:00
Denis Kenzior
79928e69cb Revert "scan: Drop unused frequency list parsing"
This reverts commit 520ad56f83.
2021-02-03 13:34:23 -06:00
James Prestwood
1c80672983 station: add Frequency to diagnostics dictionary 2021-02-03 12:54:59 -06:00
Denis Kenzior
c3f76cb5a5 station: Return NotHidden error
Commit d372d59bea checks whether a hidden network had a previous
connection attempt and re-tries.  However, it inadvertently dropped
handling of a condition where a non-hidden network SSID is provided to
ConnectHiddenNetwork.  Fix that.

Fixes: d372d59bea ("station: Allow ConnectHiddenNetwork to be retried")
2021-02-03 09:12:08 -06:00
James Prestwood
676ee1e4d2 ap: tie diagnostic interface to AP Start/Stop
The diagnostic interface serves no purpose until the AP has
been started. Any calls on it will return an error so instead
it makes more sense to bring it up when the AP is started, and
down when the AP is stopped.
2021-02-02 15:54:56 -06:00
James Prestwood
ec15ef1d34 ap: add Name property
Its useful being able to refer to the network Name/SSID once
an AP is started. For example opening an iwctl session with an
already started AP provides no way of obtaining the SSID.
2021-02-02 15:53:25 -06:00
Denis Kenzior
2bebb4bdc7 netdev: Handle deauth frames prior to association
In some cases the AP can send a deauthenticate frame right after
accepting our authentication.  In this case the kernel never properly
sends a CMD_CONNECT event with a failure, even though CMD_COONNECT was
used to initiate the connection.  Try to work around that by detecting
that a Deauthenticate event arrives prior to any Associte or Connect
events and handle this case as a connect failure.
2021-02-02 15:27:50 -06:00
Denis Kenzior
c319bca477 station: correctly set mac randomization hint
Now that ConnectHiddenNetwork can be invoked while we're connected, set
the mac randomization hint parameter properly.  The kernel will reject
requests if randomization is enabled while we're connected to a network.
2021-02-02 09:54:34 -06:00
Denis Kenzior
06ca8e20a9 station: Hide forgotten hidden networks
If we forget a hidden network, then make sure to remove it from the
network list completely.  Otherwise it would be possible to still
issue a Network.Connect to that particular object, but the fact that the
network is hidden would be lost.
2021-02-02 09:36:37 -06:00
Denis Kenzior
add3d43dad station: expire networks found by hidden scan sooner 2021-02-01 15:30:15 -06:00
Denis Kenzior
08a295c348 station: Fix leaking of roam_freqs on shutdown
==17639== 72 (16 direct, 56 indirect) bytes in 1 blocks are definitely
lost in loss record 3 of 3
==17639==    at 0x4C2F0CF: malloc (vg_replace_malloc.c:299)
==17639==    by 0x4670AD: l_malloc (util.c:61)
==17639==    by 0x4215AA: scan_freq_set_new (scan.c:1906)
==17639==    by 0x412A9C: parse_neighbor_report (station.c:1910)
==17639==    by 0x407335: netdev_neighbor_report_frame_event
(netdev.c:3522)
==17639==    by 0x44BBE6: frame_watch_unicast_notify (frame-xchg.c:233)
==17639==    by 0x470C04: dispatch_unicast_watches (genl.c:961)
==17639==    by 0x470C04: process_unicast (genl.c:980)
==17639==    by 0x470C04: received_data (genl.c:1101)
==17639==    by 0x46D9DB: io_callback (io.c:118)
==17639==    by 0x46CC0C: l_main_iterate (main.c:477)
==17639==    by 0x46CCDB: l_main_run (main.c:524)
==17639==    by 0x46CF01: l_main_run_with_signal (main.c:656)
==17639==    by 0x403EDE: main (main.c:490)
2021-02-01 15:12:17 -06:00
Denis Kenzior
d372d59bea station: Allow ConnectHiddenNetwork to be retried
In the case that ConnectHiddenNetwork scans successfully, but fails for
some other reason, the network object is left in the scan results until
it expires.  This will prevent subsequent attempts to use
ConnectHiddenNetwork with a .NotHidden error.  Fix that by checking
whether a found network is hidden, and if so, allow the request to
proceed.
2021-02-01 14:19:37 -06:00
Denis Kenzior
e04ae506a3 network: rework network_connect_new_hidden_network
Rework the logic slightly so that this function returns an error message
on error and NULL on success, just like other D-Bus method
implementations.  This also simplifies the code slightly.
2021-02-01 13:37:07 -06:00
Denis Kenzior
56538bf75b station: Allow ConnectHiddenNetwork while connected
We used to not allow to connect to a different network while already
connected.  One had to disconnect first.  This also applied to
ConnectHiddenNetwork calls.

This restriction can be dropped now.  station will intelligently
disconnect from the current AP when a station_connect_network() is
issued.
2021-02-01 13:37:07 -06:00
Denis Kenzior
fc10ee8745 station: Fix not cleaning up pending_connect
If the disconnect fails and station_disconnect_onconnect_cb is called
with an error, we reply to the original message accordingly.
Unfortunately pending_connect is not unrefed or cleared in this case.
Fix that.

Fixes: d0ee923dda ("station: Disconnect, if needed, on a new connection attempt")
2021-02-01 13:37:07 -06:00
Andrew Zaborowski
074bc52717 eapol,ap: Remove assumption of single cipher in authenticator IE
Allow the user of the eapol_sm & handshake_state APIs to have multiple
pairwise ciphers listed in the authenticator IE.
2021-02-01 10:06:21 -06:00
Andrew Zaborowski
436c5a45e4 ap: Set the group cipher when sending START_AP
Seems this was overlooked because an initial version of ap.c didn't have
group traffic support.
2021-02-01 10:05:55 -06:00
Andrew Zaborowski
065f19b479 ap: Fix cleanup on ap_parse_new_station_ies errors 2021-01-29 20:06:18 -06:00
James Prestwood
756158dfc9 knownnetworks: sanitize known_network.freq on load
An invalid known_network.freq file containing several UUID
groups which have the same 'name' key results in memory leaks
in IWD. This is because the file is loaded and the group's
are iterated without detecting duplicates. This leads to the
same network_info's known_frequencies being set/overridden
multiple times.

To fix this we just check if the network_info already has a
UUID set. If so remove the stale entry.

There may be other old, invalid, or stale entries from previous
versions of IWD, or a user misconfiguring the file. These will
now also be removed during load.
2021-01-29 17:48:03 -06:00
James Prestwood
7b2ce98abd station: fix leak on parse_neighbor_report 2021-01-29 17:22:20 -06:00
James Prestwood
9f33740d41 ap: fix off by one error
The RSN element was not being allocated properly which caused
an invalid read in some cases.
2021-01-29 15:04:10 -06:00
Denis Kenzior
ed0f3e87ca netdev: Fix re-entrancy bug in netdev_shutdown
netdev_shutdown calls queue_destroy on the netdev_list, which in turn
calls netdev_free.  netdev_free invokes the watches to notify them about
the netdev being removed.  Those clients, or anything downstream can
still invoke netdev_find.  Unfortunately queue_destroy is not re-entrant
safe, so netdev_find might return stale data.  Fix that by using
l_queue_peek_head / l_queue_pop_head instead.

src/station.c:station_enter_state() Old State: connecting, new state:
connected
^CTerminate
src/netdev.c:netdev_free() Freeing netdev wlan1[6]
src/device.c:device_free()
Removing scan context for wdev 100000001
src/scan.c:scan_context_free() sc: 0x4ae9ca0
src/netdev.c:netdev_free() Freeing netdev wlan0[48]
src/device.c:device_free()
src/station.c:station_free()
src/netconfig.c:netconfig_destroy()
==103174== Invalid read of size 8
==103174==    at 0x467AA9: l_queue_find (queue.c:346)
==103174==    by 0x43ACFF: netconfig_reset (netconfig.c:1027)
==103174==    by 0x43AFFC: netconfig_destroy (netconfig.c:1123)
==103174==    by 0x414379: station_free (station.c:3369)
==103174==    by 0x414379: station_destroy_interface (station.c:3466)
==103174==    by 0x47C80C: interface_instance_free (dbus-service.c:510)
==103174==    by 0x47C80C: _dbus_object_tree_remove_interface
(dbus-service.c:1694)
==103174==    by 0x47C99C: _dbus_object_tree_object_destroy
(dbus-service.c:795)
==103174==    by 0x409A87: netdev_free (netdev.c:770)
==103174==    by 0x4677AE: l_queue_clear (queue.c:107)
==103174==    by 0x4677F8: l_queue_destroy (queue.c:82)
==103174==    by 0x40CDC1: netdev_shutdown (netdev.c:5089)
==103174==    by 0x404736: iwd_shutdown (main.c:78)
==103174==    by 0x404736: iwd_shutdown (main.c:65)
==103174==    by 0x46BD61: handle_callback (signal.c:78)
==103174==    by 0x46BD61: signalfd_read_cb (signal.c:104)
2021-01-29 15:02:19 -06:00
Denis Kenzior
bd6d19e084 netdev: Squash memory leak on module_init failure
In the case of module_init failing due to a module that comes after
netdev, the netdev module doesn't clean up netdev_list properly.

==6254== 24 bytes in 1 blocks are still reachable in loss record 1 of 1
==6254==    at 0x483777F: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==6254==    by 0x4675ED: l_malloc (util.c:61)
==6254==    by 0x46909D: l_queue_new (queue.c:63)
==6254==    by 0x406AE4: netdev_init (netdev.c:5038)
==6254==    by 0x44A7B3: iwd_modules_init (module.c:152)
==6254==    by 0x404713: nl80211_appeared (main.c:171)
==6254==    by 0x4713DE: process_unicast (genl.c:993)
==6254==    by 0x4713DE: received_data (genl.c:1101)
==6254==    by 0x46E00B: io_callback (io.c:118)
==6254==    by 0x46D20C: l_main_iterate (main.c:477)
==6254==    by 0x46D2DB: l_main_run (main.c:524)
==6254==    by 0x46D2DB: l_main_run (main.c:506)
==6254==    by 0x46D502: l_main_run_with_signal (main.c:656)
==6254==    by 0x403EDB: main (main.c:490)
2021-01-29 13:39:20 -06:00
James Prestwood
aefcaf8559 ap: handle GET_KEY error setting RSC to zero
Rather than the previous hack which disabled group traffic it
was found that the GTK RSC could be manually set to zero which
allows group traffic. This appears to fix AP mode on brcmfmac
along with the previous fixes. This is not documented in
nl80211, but appears to work with this driver.
2021-01-29 13:15:36 -06:00
James Prestwood
4635e095ba ap: rename ap_parse_ie to be more descriptive
This is only used for NEW_STATION parsing so name appropriately
2021-01-29 13:15:24 -06:00
James Prestwood
32028f6daf ap: add DEL_STATION path to fullmac AP handling
This is how a fullmac card tells userspace that a station has
left. This fixes the issue where the same client cannot re-connect
to the same AP multiple times. ap_new_station was renamed to
ap_handle_new_station for consistency.
2021-01-29 11:36:09 -06:00
James Prestwood
7429b2162d ap: allow no group traffic on GET_KEY error
Some fullmac cards were found to be buggy with getting the GTK
where it returns a BIP key for the GTK index, even after creating
a GTK with NEW_KEY explicitly. In an effort to get these cards
semi-working we can treat this just as a warning and continue with
the handshake without a GTK set which disables group traffic. A
warning is printed in this case so the user is not completely in
the dark.
2021-01-28 13:41:43 -06:00
Alvin Šipraga
a04b61ec77 netdev: preserve cur_rssi_low across reassociation
Fix an issue with the recent changes to signal monitoring from commit
f456501b ("station: retry roaming unless notified of a high RSSI"):

    1. driver sends NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW
    2. netdev->cur_rssi_low changes from FALSE to TRUE
    3. netdev sends NETDEV_EVENT_RSSI_THRESHOLD_LOW to station
    4. on roam reassociation, cur_rssi_low is reset to FALSE
    5. station still assumes RSSI is low, periodically roams
       until netdev sends NETDEV_EVENT_RSSI_THRESHOLD_HIGH
    6. driver sends NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH
    7. netdev->cur_rssi_low doesn't change (still FALSE)
    8. netdev never sends NETDEV_EVENT_RSSI_THRESHOLD_HIGH
    9. station remains stuck in an infinite roaming loop

The commit in question introduced the logic in (5). Previously the
assumption in station was - like in netdev - that if the signal was
still low, the driver would send a duplicate LOW event after
reassociation. This change makes netdev follow the same new logic as
station, i.e. assume the same signal state (LOW/HIGH) until told
otherwise by the driver.
2021-01-28 13:40:10 -06:00
James Prestwood
63c8df78a3 ap: handle NEW_STATION for fullmac cards
Since fullmac cards handle auth/assoc in firmware IWD must
react differently while in AP mode just as it does in station.
For fullmac cards a NEW_STATION event is emitted post association
and from here the 4-way handshake can begin. In this NEW_STATION
handler a new sta_state is created and the needed members are
set in order to inject us back into the normal code execution
for softmac post association (i.e. creating group keys and
starting the 4-way handshake). From here everything works the
same as softmac.
2021-01-28 13:25:18 -06:00
Denis Kenzior
6db352a82d manager: UseDefaultInterface for bcmsdh_sdmmc
This driver is used on some ARM based devices
2021-01-27 09:58:34 -06:00
Andrew Zaborowski
6f62056fcf eap-tls: Use the right variable in settings check 2021-01-27 09:52:47 -06:00
James Prestwood
a9c32d85ea station: cancel quick scans on Connect()
At some point the non-interactive client tests began failing.
This was due to a bug in station where it would transition from
'connected' to 'autoconnect' due to a failed scan request. This
happened because a quick scan got scheduled during an ongoing
scan, then a Connect() gets issued. The work queue treats the
Connect as a priority so it delays the quick scan until after the
connection succeeds. This results in a failed quick scan which
IWD does not expect to happen when in a 'connected' state. This
failed scan actually triggers a state transition which then
gets IWD into a strange state where its connected from the
kernel point of view but does not think it is:

src/station.c:station_connect_cb() 13, result: 0
src/station.c:station_enter_state() Old State: connecting, new state: connected
src/wiphy.c:wiphy_radio_work_done() Work item 6 done
src/wiphy.c:wiphy_radio_work_next() Starting work item 5
src/station.c:station_quick_scan_triggered() Quick scan trigger failed: -95
src/station.c:station_enter_state() Old State: connected, new state: autoconnect_full

To fix this IWD should simply cancel any pending quick scans
if/when a Connect() call comes in.
2021-01-26 14:45:00 -06:00
Andrew Zaborowski
5c95c5cc16 netconfig: Set more correct buffer length
Use INET_ADDRSTRLEN as the IPv4 address buffer size to avoid confusion.
2021-01-25 14:01:58 -06:00
Andrew Zaborowski
54e3bb385a doc: Specify the DNS format as string lists 2021-01-25 14:01:58 -06:00
Andrew Zaborowski
d6e99c1197 doc: Update EAP-TLS client key setting information 2021-01-25 14:01:58 -06:00
Andrew Zaborowski
84cae48c1b eap-tls: Make use of l_cert_load_container_file
Switch EAP-TLS-ClientCert and EAP-TLS-ClientKey to use
l_cert_load_container_file for file loading so that the file format is
autodetected.  Add new setting EAP-TLS-ClientKeyBundle for loading both
the client certificate and private key from one file.
2021-01-25 14:01:58 -06:00
Andrew Zaborowski
b0aa1e4e88 eap-tls: Drop EAP-{TTLS,PEAP}-Client{Cert,Key}
As requested move the client certificate and private key loading from
eap-tls-common.c to eap-tls.c.  No man page change needed because those
two settings weren't documented in it in the first place.
2021-01-25 14:01:58 -06:00
James Prestwood
9c33572aee ap: add AP diagnostic interface
This adds a new AccessPointDiagnostic interface. This interface
provides similar low level functionality as StationDiagnostic, but
for when IWD is in AP mode. This uses netdev_get_all_stations
which will dump all stations, parse, and return each station in
an individual callback. Once the dump is complete the destroy is
called and all data is packaged as an array of dictionaries.
2021-01-22 15:00:48 -06:00
James Prestwood
158dc40340 station: refactor to use diagnostic_info_to_dict 2021-01-22 14:59:47 -06:00
James Prestwood
b5d927ec3b diagnostic: commonize the building of diagnostic dict
AP mode will use the same structure for its diagnostic interface
and mostly the same dictionary keys. Apart from ConnectedBss and
Address being different, the remainder are the same so the
diagnostic_station_info to DBus dictionary conversion has been made
common so both station and AP can use it to build its diagnostic
dictionaries.
2021-01-22 14:41:20 -06:00
James Prestwood
5a6b474a14 netdev: move netdev_station_info to diagnostic.h
With AP now getting its own diagnostic interface it made sense
to move the netdev_station_info struct definition into its own
header which eventually can be accompanied by utilities in
diagnostic.c. These utilities can then be shared with AP and
station as needed.
2021-01-22 14:40:45 -06:00
Alvin Šipraga
e03b1e263d build: add After=network-pre.target to service files
systemd specifies a special passive target unit 'network-pre.target'
which may be pulled in by services that want to run before any network
interface is brought up or configured. Correspondingly, network
management services such as iwd and ead should specify
After=network-pre.target to ensure a proper ordering with respect to
this special target. For more information on network-pre.target, see
systemd.special(7).

Two examples to explain the rationale of this change:

1. On one of our embedded systems running iwd, a oneshot service is
   run on startup to configure - among other things - the MAC address of
   the wireless network interface based on some data in an EEPROM.
   Following the systemd documentation, the oneshot service specifies:

        Before=network-pre.target
        Wants=network-pre.target

   ... to ensure that it is run before any network management software
   starts. In practice, before this change, iwd was starting up and
   connecting to an AP before the service had finished. iwd would then
   get kicked off by the AP when the MAC address got changed. By
   specifying After=network-pre.target, systemd will take care to avoid
   this situation.

2. An administrator may wish to use network-pre.target to ensure
   firewall rules are applied before any network management software is
   started. This use-case is described in the systemd documentation[1].
   Since iwd can be used for IP configuration, it should also respect
   the After=network-pre.target convention.

Note that network-pre.target is a passive unit that is only pulled in if
another unit specifies e.g. Wants=network-pre.target. If no such unit
exists, this change will have no effect on the order in which systemd
starts iwd or ead.

[1] https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
2021-01-22 14:17:16 -06:00
Alvin Šipraga
947d7c611b doc: describe RoamRetryInterval setting 2021-01-22 13:48:02 -06:00
Alvin Šipraga
4266b88658 station: add RoamRetryInterval setting 2021-01-22 13:46:25 -06:00
Alvin Šipraga
f456501b9e station: retry roaming unless notified of a high RSSI
Following a successful roaming sequence, schedule another attempt unless
the driver has sent a high RSSI notification. This makes the behaviour
analogous to a failed roaming attempt where we remained connected to the
same BSS.

This makes iwd compatible with wireless drivers which do not necessarily
send out a duplicate low RSSI notification upon reassociation. Without
this change, iwd risks getting indefinitely stuck to a BSS with low
signal strength, even though a better BSS might later become available.

In the case of a high RSSI notification, the minimum roam time will also
be reset to zero. This preserves the original behaviour in the case
where a high RSSI notification is processed after station_roamed().
Doing so also gives a chance for faster roaming action in the following
example scenario:

    1. RSSI LOW
    2. schedule roam in 5 seconds
        (5 seconds pass)
    3. try roaming
    4. roaming fails, same BSS
    5. schedule roam in 60 seconds
        (20 seconds pass)
    6. RSSI HIGH
    7. cancel scheduled roam
        (20 seconds pass)
    8. RSSI LOW
    9. schedule roam in 5 seconds or 20 seconds?

By resetting the minimum roam time, we can avoid waiting 20 seconds when
the station may have moved considerably. And since the high/low RSSI
notifications are configured with a hysteresis, we should still be
protected against too frequent spurious roaming attempts.
2021-01-22 13:41:07 -06:00
James Prestwood
8e03d56688 netdev: add netdev_get_all_stations
This is a nl80211 dump version of netdev_get_station aimed at
AP mode. This will dump all stations, parse into
netdev_station_info structs, and call the callback for each
individual station found. Once the dump is completed the destroy
callback is called.
2021-01-20 14:01:15 -06:00
James Prestwood
8620698b66 dbus: add AccessPointDiagnostic interface 2021-01-20 14:01:10 -06:00
Alvin Šipraga
9edd941bc2 station: remove unused roam_no_orig_ap state variable
Since commit 836beb1276 removed beacon
loss handling, the roam_no_orig_ap variable has no use and is always set
to false. This commit removes it.
2021-01-20 11:14:06 -06:00
James Prestwood
a17e5e0f7f station: create StationDiagnostic interface
This interface sits aside the regular station interface but
provides low level connection details for diagnostic and
testing purposes.
2021-01-14 15:02:13 -06:00
James Prestwood
93b5a5a4ae netdev: parse expected throughput in netdev_get_station 2021-01-14 14:58:33 -06:00
James Prestwood
0ba73ec139 netdev: parse rates in netdev_get_station 2021-01-14 14:57:19 -06:00
James Prestwood
08de8186c6 netdev: update RSSI polling to use station info parser 2021-01-12 13:39:14 -06:00
James Prestwood
cf17d42972 netdev: add netdev_get_station/current_station
This adds a generalized API for GET_STATION. This API handles
calling and parsing the results into a new structure,
netdev_station_info. This results structure will hold any
data needed by consumers of netdev_get_station. A helper API
(netdev_get_current_station) was added as a convenience which
automatically passes handshake->aa as the MAC.

For now only the RSSI is parsed as this is already being
done for RSSI polling/events. Looking further more info will
be added such as rx/tx rates and estimated throughput.
2021-01-12 13:39:07 -06:00
James Prestwood
09b124f073 dbus: add helper for appending a dictionary
Arrays of dictionaries are quite common, and for basic
types this API makes things much more convenient by
putting all the enter/append/leave calls in one place.
2021-01-12 13:19:38 -06:00
James Prestwood
668b61ff3a dbus: add diagnostic interface definition 2021-01-11 14:51:48 -06:00
Andrew Zaborowski
9ef3d51f87 crypto: Update l_pkcs5_pbkdf2 call after rename 2021-01-07 14:05:40 -06:00
Andrew Zaborowski
047b0e71a1 eap-tls: Dump server certificate when IWD_TLS_DEBUG set 2021-01-04 12:17:00 -06:00
Carlo Abelli
d3606cd255 doc: move EnableIPv6 under Network
The EnableIPv6 option is incorrectly documented under General but should
be documented under Network instead.
2020-12-22 09:35:48 -06:00
Andrew Zaborowski
f5a30a1cfc station: Don't expire BSSes between freq subset scans
Add a parameter to station_set_scan_results to allow skipping the
removal of old BSSes.  In the DBus-triggered scan only expire BSSes
after having gone through the full supported frequency set.

It should be safe to pass partial scan results to
station_set_scan_results() when not expiring BSSes so using this new
parameter I guess we could also call it for roam scan results.
2020-12-17 20:22:47 -06:00
Andrew Zaborowski
e3bece76f9 station: Split DBus scans into 3 frequency subsets
A scan normally takes about 2 seconds on my dual-band wifi adapter when
connected.  The drivers will normally probe on each supported channel in
some unspecified order and will have new partial results after each step
but the kernel sends NL80211_CMD_NEW_SCAN_RESULTS only when the full
scan request finishes, and for segmented scans we will wait for all
segments to finish before calling back from scan_active() or
scan_passive().

To improve user experience define our own channel order favouring the
2.4 channels 1, 6 and 11 and probe those as an individual scan request
so we can update most our DBus org.connman.iwd.Network objects more
quickly, before continuing with 5GHz band channels, updating DBus
objects again and finally the other 2.4GHz band channels.

The overall DBus-triggered scan on my wifi adapter takes about the same
time but my measurements were not very strict, and were not very
consistent with and without this change.  With the change most Network
objects are updated after about 200ms though, meaning that I get most
of the network updates in the nm-applet UI 200ms from opening the
network list.  The 5GHz band channels take another 1 to 1.5s to scan and
remaining 2.4GHz band channels another ~300ms.

Hopefully this is similar when using other drivers although I can easily
imagine a driver that parallelizes 2.4GHz and 5GHz channel probing using
two radios, or uses 2, 4 or another number of dual-band radios to probe
2, 4, ... channels simultanously.  We'd then lose some of the
performance benefit.  The faster scan results may be worth the longer
overall scan time anyway.
I'm also assuming that the wiphy's supported frequency list is exactly
what was scanned when we passed no frequency list to
NL80211_CMD_TRIGGER_SCAN and we won't get errors for passing some
frequency that shouldn't have been scanned.
2020-12-17 20:15:37 -06:00
James Prestwood
f39d1b4ac2 netconfig: add ACD client for static configuration
When the IP is configured to be static we can now use ACD in
order to check that the IP is available and not already in
use. If a conflict is found netconfig will be reset and no IP
will be set on the interface. The ACD client is left with
the default 'defend once' policy, and probes are not turned
off. This will increase connection time, but for static IP's
it is the best approach.
2020-12-08 16:29:09 -06:00
James Prestwood
4353110684 doc: use real example for APRanges
The docs just specified what a IP prefix looks like, not an
actual example. Though its not recommended to just copy paste
blindly, its still useful to have some value in the man pages
that actually works if someone just wants to get a DHCP server
working.
2020-12-02 16:12:56 -06:00
Denis Kenzior
278abc66be netconfig: Also set the domains obtained from IPv6 2020-12-02 10:55:05 -06:00
Denis Kenzior
967b7e75e3 resolve: Handle empty dns/domain lists
In the strange case that the dns list or the domain list are empty and
openresolv is being used, delete the openresolv entry instance instead
of trying to set it to an empty value
2020-12-02 10:55:05 -06:00
Alvin Šipraga
b647f8e1f0 network: clear info of removed known network before disconnect
Make sure to erase the network_info of a known network that has been
removed before disconnecting any stations connected to it. This fixes
the following warning observed when forgetting a connected network:

  WARNING: ../git/src/network.c:network_rank_update() condition n < 0 failed

This also fixes a bug where such a forgotten network would incorrectly
appear as the first element in the response to GetOrderedNetworks().  By
clearing the network_info, network_rank_update() properly negates the
rank of the now-unknown network.
2020-12-01 09:54:52 -06:00
James Prestwood
ccf265b943 netconfig: fix freeing invalid pointer
If l_rtnl_ifaddr4_extract does not set the values they would
get freed. Instead initialize to NULL so the cleanup free is
a no op.
2020-11-23 23:29:54 -06:00
Denis Kenzior
ebc42ccecf netconfig: Don't re-create address on RENEWAL
==5279== 104 bytes in 2 blocks are definitely lost in loss record 1 of 1
==5279==    at 0x4C2F0CF: malloc (vg_replace_malloc.c:299)
==5279==    by 0x4655CD: l_malloc (util.c:61)
==5279==    by 0x47116B: l_rtnl_address_new (rtnl.c:136)
==5279==    by 0x438F4B: netconfig_get_dhcp4_address (netconfig.c:429)
==5279==    by 0x438F4B: netconfig_ipv4_dhcp_event_handler
(netconfig.c:735)
==5279==    by 0x491C77: dhcp_client_event_notify (dhcp.c:332)
==5279==    by 0x491C77: dhcp_client_rx_message (dhcp.c:810)
==5279==    by 0x492A88: _dhcp_default_transport_read_handler
(dhcp-transport.c:151)
==5279==    by 0x46BECB: io_callback (io.c:118)
==5279==    by 0x46B10C: l_main_iterate (main.c:477)
==5279==    by 0x46B1DB: l_main_run (main.c:524)
==5279==    by 0x46B3EA: l_main_run_with_signal (main.c:646)
==5279==    by 0x403ECE: main (main.c:490)
2020-11-23 14:59:20 -06:00
Andrew Zaborowski
7c7831b53d doc: Update iwd.network.5 with changes from wiki
Fix the AlwaysRandomizeAddress setting name.

Add the stricter specification of the extension syntax.

Clarify that GTC and MD5 can't be used as outer EAP methods with wifi.
2020-11-19 14:21:42 -06:00
Denis Kenzior
69e86f4d21 netconfig: Remove tracking of addresses
Tracking of addresses that weren't set by us seemed a bit questionable.
Take this out for now.  If this is ever needed, then a queue with
l_rtnl_address objects should be used.
2020-11-19 14:19:17 -06:00
Denis Kenzior
6f5ec005e9 netconfig: Rework IPv4 address handling
Introduce a new v4_address member which will hold the currently
configured IPV4 address (static or obtained via DHCP).  Use the new
l_rtnl_address class for this.

As a side-effect, lease expiration will now properly remove the
configured address.
2020-11-19 14:19:13 -06:00
Denis Kenzior
eb151efc81 netconfig: Rework static IPv6 address handling
This patch converts the code to use the new l_rtnl_address class.  The
settings parsing code will now return an l_rtnl_address object which
can be installed directly.

Also, address removal path for static addresses has been removed, since
netconfig_reset() sets disable_ipv6 setting to '1', which will remove
all IPV6 addresses for the interface.
2020-11-19 13:28:38 -06:00
Denis Kenzior
b6cf9ef866 netconfig: Rework static IPv6 route handling
This patch converts the code to use the new l_rtnl_route class instead
of using l_rtnl_route6* utilities.  The settings parsing code will now
return an l_rtnl_route object which can be installed directly.

Also, the route removal path has been removed since netconfig_reset()
sets disable_ipv6 setting to '1' which will remove all IPV6 routes and
addresses for the interface.
2020-11-19 13:08:51 -06:00
Denis Kenzior
3890431090 netconfig: Install search domains obtained from DHCPv6 2020-11-18 12:00:17 -06:00
Denis Kenzior
dcaf0150b9 netconfig: Re-start DHCPv6 client
If lease expired or was not obtained initially, re-start the DHCPv6
client.
2020-11-18 10:39:29 -06:00
Denis Kenzior
c46a5d7c84 netconfig: Install DNS addresses obtained from DHCPv6
This also changes the resolve API a little bit to act as a 'set' API
instead of an incremental 'add' API.  This is actually easier to manage
in the resolve module since both systemd and resolvconf want changes
wholesale and not incrementally.
2020-11-18 10:39:16 -06:00
James Prestwood
845658bd32 station: get neighbor reports early
Waiting to request neighbor reports until we are in need of a roam
delays the roam time, and probably isn't as reliable since we are
most likely in a low RSSI state. Instead the neighbor report can
be requested immediately after connecting, saved, and used if/when
a roam is needed. The existing behavior is maintained if the early
neighbor report fails where a neighbor report is requested at the
time of the roam.

The code which parses the reports was factored out and shared
between the existing (late) neighbor report callback and the early
neighbor report callback.
2020-11-16 18:14:07 -06:00