mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-10-06 03:18:46 +02:00
373 lines
12 KiB
Plaintext
373 lines
12 KiB
Plaintext
Background
|
|
==========
|
|
|
|
- Priority scale: High, Medium and Low
|
|
|
|
- Complexity scale: C1, C2, C4 and C8. The complexity scale is exponential,
|
|
with complexity 1 being the lowest complexity. Complexity is a function
|
|
of both task 'complexity' and task 'scope'.
|
|
|
|
The general rule of thumb is that a complexity 1 task should take 1-2 weeks
|
|
for a person very familiar with the codebase. Higher complexity tasks
|
|
require more time and have higher uncertainty.
|
|
|
|
Higher complexity tasks should be refined into several lower complexity tasks
|
|
once the task is better understood.
|
|
|
|
|
|
mac80211_hwsim
|
|
==============
|
|
|
|
- Add support for HWSIM_CMD_SET_RADIO command
|
|
|
|
To allow modifying an existing radio, add the HWSIM_CMD_SET_RADIO. The
|
|
first possible feature should be to emulate the hardware RFKILL switch.
|
|
|
|
It might be required to add a HWSIM_ATTR_RADIO_HW_RFKILL attribute flag
|
|
to the HWSIM_CMD_NEW_RADIO to enable virtual radios with a hardware
|
|
level RFKILL switch.
|
|
|
|
Priority: Medium
|
|
Complexity: C1
|
|
|
|
- Allow configuration of MAC address or list of MAC addresses
|
|
|
|
The radios are auto-generating a fake MAC address. It would be useful
|
|
to allow specifying a MAC address to be used. In certain cases it might
|
|
be also useful to provide a list of MAC addresses so that for example
|
|
with secondary interfaces these can be used.
|
|
|
|
Priority: Low
|
|
Complexity: C2
|
|
|
|
- Move mac80211_hwsim.h header file to UAPI includes
|
|
|
|
The mac80211_hwsim.h is the public API description of this netlink
|
|
interface and thus it should be provided via UAPI includes.
|
|
|
|
For this work work the mac80211_hwsim.h header needs to be modified
|
|
so that it also compiles from userspace. At the moment it throws
|
|
errors. And it needs to become part of the UAPI headers of the
|
|
Linux kernel.
|
|
|
|
In addition it should provide HWSIM_GENL_NAME that provides the
|
|
generic netlink "MAC82011_HWSIM" family string.
|
|
|
|
Priority: Low
|
|
Complexity: C1
|
|
|
|
- Provide kernel option to allow defining the number of initial radios
|
|
|
|
By default the mac80211_hwsim modules creates 2 radios by default unless
|
|
it is overwritten with the radios=x module parameter.
|
|
|
|
To allow loading the mac80211_hwsim by default and even with accidental
|
|
loading of the module, it would be good to provide a kernel configuration
|
|
option that allows changing the default value here.
|
|
|
|
For our testing we want to load mac80211_hwsim without any radios. Maybe
|
|
this should be the default for the new kernel option.
|
|
|
|
If the default of initial radios can be changed to zero, then it is also
|
|
possible to add MODULE_ALIAS_GENL_FAMILY to support auto-loading of
|
|
the mac80211_hwsim kernel module.
|
|
|
|
Priority: Low
|
|
Complexity: C1
|
|
|
|
- New configuration options for radios
|
|
|
|
At the moment the radios created are all equal and feature rich. However
|
|
for testing we want to create radios with different emulated hardware
|
|
capabilities. Provide new attributes or flags that allow enabling or
|
|
disabling certain mac80211 features.
|
|
|
|
For example AP mode, P2P mode, number of interface combinations, TDLS
|
|
support, number of Scan SSIDs, supported ciphers and so on.
|
|
|
|
Priority: Low
|
|
Complexity: C2
|
|
|
|
|
|
Wireless monitor
|
|
================
|
|
|
|
- Add support for PACKET_RECV_OUTPUT socket option of AF_PACKET
|
|
|
|
Instead of having to switch every interface manually into promiscuous
|
|
mode, it would be useful to set PACKET_RECV_OUTPUT to receive also
|
|
the traffic that leaves the system.
|
|
|
|
This would make tracing PAE / EAPoL traffic easy and provides better
|
|
sniffing capabilities.
|
|
|
|
Unfortunately, PACKET_RECV_OUTPUT logic is not implemented at all in
|
|
the kernel. So, first implement it in the kernel, and then use it in
|
|
nlmon.c as a set_sockopt option.
|
|
|
|
Priority: Low
|
|
Complexity: C8
|
|
|
|
- Subscribe to all nl80211 multicast groups at startup
|
|
|
|
It seems the nlmon packets are limited to actual subscribed mutlicast
|
|
groups. To get a complete picture of all the nl80211 commands and
|
|
events, it is required that iwmon adds membership to all multicast
|
|
groups that the nl80211 lists.
|
|
|
|
This means that the netlink socket used for resolving nl80211 family
|
|
name needs to be kept open and actively processed since it will also
|
|
receive these multicast events. However the event itself can be dropped
|
|
since the one from nlmon with the proper kernel level timestamps should
|
|
be taken into account.
|
|
|
|
An alternative is to fix the netlink_deliver_tap() function in the
|
|
kernel netlink layer to not be affected by the broadcast filtering.
|
|
|
|
Priority: Medium
|
|
Complexity: C1
|
|
|
|
- Print the 'group' of the decoded message
|
|
|
|
Whenever an event / message is received, iwmon should print the genl
|
|
group of the message (e.g. mlme, scan, config, regulatory). This will
|
|
make it easier to add handling of such events / commands inside iwd.
|
|
|
|
Priority: Medium
|
|
Complexity: C1
|
|
|
|
|
|
Wireless simulator
|
|
==================
|
|
|
|
- Add support for builtin wireless access point emulator
|
|
|
|
When creating a pair of mac80211_hwsim radios, allow one to operate as
|
|
access point. The hwsim utility will emulate the access point on the
|
|
second interface for as long as it is running. Which means that from
|
|
the first interface it is possible to scan and connect to this access
|
|
point using standard wireless tools (including iwd and iwctl).
|
|
|
|
Code for the AP mode can be shared from iwd feature for access point
|
|
operation once that has been implemented.
|
|
|
|
Priority: Medium
|
|
Complexity: C8
|
|
|
|
|
|
Wireless daemon
|
|
===============
|
|
|
|
- Add unit test data with 2nd RSNE in Authenticator 3/4 message
|
|
|
|
The specification allows the AP to send a second RSN element in its 4-way
|
|
handshake message 3/4. Find some test data for this case and create a unit
|
|
test case.
|
|
|
|
Priority: Low
|
|
Complexity: C1
|
|
|
|
- Handle "Use group cipher suite" option for pairwise ciphers
|
|
|
|
If the AP specifies "Use group cipher suite" as its only pairwise suite, then
|
|
handle this appropriately inside EAPoL handshaking code. The install_gtk
|
|
callback might need to be modified to handle this case.
|
|
|
|
Priority: Low
|
|
Complexity: C1
|
|
|
|
- Add support for PMK Caching from 802.11-2007. This is sometimes referred to
|
|
as "fast, secure roam back". Essentially the client caches PMKIDs generated
|
|
when connecting to various APs. If the client roams back to an AP that has
|
|
already been connected to, and the PMK is cached by both, then the 802.1X
|
|
exchange can be skipped.
|
|
|
|
Priority: Low
|
|
Complexity: C4
|
|
|
|
- Add support for Opportunistic Key Caching (OKC). This is not defined by
|
|
any 802.11 standards, but is made available by major vendors such as Cisco
|
|
and Microsoft.
|
|
|
|
Priority: Low
|
|
Complexity: C4
|
|
|
|
- Add support for Automatic Power Save Delivery (APSD). This includes
|
|
scheduled (s-APSD) and unscheduled (u-APSD). This will require rudimentary
|
|
support of WMM protocol. This feature was introduced in 802.11e.
|
|
|
|
Priority: Low
|
|
Complexity: C4
|
|
|
|
- Add support for 802.11u. This is required for Passpoint 2.0 support.
|
|
|
|
Priority: Low
|
|
Complexity: C8
|
|
|
|
- Add support for Wireless Network Management (WNM) from 802.11v. Parts of
|
|
this are needed for Passpoint support.
|
|
|
|
Priority: Low
|
|
Complexity: C8
|
|
|
|
- Add support for Tunneled Direct Link Setup (TDLS) from 802.11z.
|
|
|
|
Priority: Medium
|
|
Complexity: C8
|
|
|
|
- Add support for WiFi P2P.
|
|
|
|
iwd will require a new P2P D-Bus API to be exposed in order for clients to
|
|
manage P2P connections. P2P specific logic for device management and
|
|
switching between P2P and STA/AP modes for a particular interface will be
|
|
required.
|
|
|
|
Priority: Medium
|
|
Complexity: C8
|
|
|
|
- Add support for EAP-LEAP. This is a Cisco proprietary EAP method that is
|
|
quite widespread.
|
|
|
|
Priority: Medium
|
|
Complexity: C4
|
|
|
|
- Add support for EAP-OTP. OTP stands for 'One Time Password' and can be
|
|
found in RFC3784.
|
|
|
|
Priority: Low
|
|
Complexity: C4
|
|
|
|
- Take EAP MSK size into consideration.
|
|
|
|
MSK is mandated to be 64 bytes long, and depending on the AKM, different parts
|
|
of the MSK are used to generate keys. Some EAP methods produce MSKs with less
|
|
than 64 bytes of useable data. For example, LEAP produces only 16 bytes and
|
|
MSCHAPv2 produces 32 bytes. If the AKM requires MSK of a certain size, and
|
|
the EAP method does not provide enough data, then the handshake should be
|
|
aborted.
|
|
|
|
Priority: Medium
|
|
Complexity: C2
|
|
|
|
- Implement Enrollee Session Overlap Detection after WSC Protocol Run
|
|
|
|
WSC Best Practices v2.0.1, Section 3.15 describes an enhacement to detect
|
|
PBC session overlaps. The Enrollee is asked to perform an extra scan without
|
|
the PBC request in the ProbeRequest frames after EAP-WSC completes
|
|
successfully. If another AP in PBC mode is found, then a SessionOverlap
|
|
error should be reported to the user.
|
|
|
|
Priority: Low
|
|
Complexity: C2
|
|
|
|
- DPP Support
|
|
|
|
Device Provisioning Protocol is a new specification from WiFi Alliance.
|
|
This allows devices to be provisioned, typically via a QR code.
|
|
|
|
Priority: Low
|
|
Complexity: C8
|
|
|
|
- Support receiving OCE FILS Discovery Frames
|
|
|
|
When operating in station mode, we should support receiving of FILS
|
|
Discovery frames.
|
|
|
|
Priority: Medium
|
|
Complexity: C2
|
|
|
|
- Support OCE Reduced Neighbor Reports
|
|
|
|
OCE specifies that the AP can send Reduced Neighbor Reports if the STA sets
|
|
the FILS Capability bit to true. Reduced Neighbor Reports can be used to
|
|
replace the need to scan, particularly if the AP reports RNR Completeness
|
|
attribute. RNRs can be sent in Probe Responses, Beacons and FILS Discovery
|
|
frames.
|
|
|
|
Priority: Medium
|
|
Complexity: C2
|
|
|
|
- Support OCE Scanning
|
|
|
|
OCE Specifies various scanning optimizations. When OCE scanning is enabled,
|
|
(e.g. when OCE APs are detected, or via some other means), enable the
|
|
relevant optimizations if driver support is present:
|
|
NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME
|
|
NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP
|
|
NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE
|
|
NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION
|
|
|
|
Priority: Medium
|
|
Complexity: C2
|
|
|
|
- Support OCE mutually non-overlapping channels optimization.
|
|
|
|
OCE Section 3.10 mandates that the STA should scan channels 1, 6 and 11 in
|
|
the 2.4Ghz band first, unless it expects to find an AP on a different
|
|
channel.
|
|
|
|
Priority: Low
|
|
Complexity: C1
|
|
|
|
- Support OCE RSSI-based Association Rejection attribute
|
|
|
|
OCE APs can reject a Re(Association) request with Status Code 34 and
|
|
optionally include RSSI-based Association Rejection attribute. This
|
|
attribute can either contain a time delay information or an RSSI delta
|
|
value. If the time delay info is included, make sure that this particular
|
|
BSS is blacklisted only for the duration of the delay. If RSSI delta
|
|
is included, make sure to handle that as well.
|
|
|
|
Priority: Low
|
|
Complexity: C1
|
|
|
|
- Support additional metrics sent by OCE APs
|
|
|
|
OCE APs can send BSS Load and Extended BSS Load IEs. iwd already takes the
|
|
BSS Load IE into account for ranking purposes. If Extended BSS Load IE is
|
|
present, it should be taken into account as well.
|
|
|
|
Additionally, Estimated Service Parameter (ESP) and Reduced WAN Metrics
|
|
should be taken into account if available.
|
|
|
|
Priority: Low
|
|
Complexity: C4
|
|
|
|
- Support OCE FILS Indication element
|
|
|
|
OCE APs that support FILS authentication can notify which domains they
|
|
support. This information is made available using the FILS Indication
|
|
element as part of the Probe Response and Beacon frames.
|
|
|
|
Priority: Low
|
|
Complexity: C4
|
|
|
|
- Support OCE Higher Layer Protocol Encapsulation
|
|
|
|
This can be used to obtain DHCPv4 address faster.
|
|
|
|
Priority: Medium
|
|
Complexity: C4
|
|
|
|
- Support Diagnostics interface
|
|
|
|
The diagnostic interface for a particular Device would contain information
|
|
(and possibly operations) that would be meant for diagnostics applications
|
|
or other applications that require access to very low level details. Such
|
|
applications would be expected how to interpret this information
|
|
appropriately.
|
|
|
|
This interface would also be heavily utilized by the Auto-Test framework
|
|
in order to more easily ascertain the internal state of the hardware & the
|
|
daemon itself.
|
|
|
|
The list of possible information exposed via this interface includes:
|
|
- MAC address of the currently connected AP (in a Station)
|
|
- MAC addresses of currently connected clients (Adhoc, AP, etc)
|
|
- packet error rates or signal strength
|
|
- Throughput statistics
|
|
- FTM / direction finding operations
|
|
|
|
Priority: Medium
|
|
Complexity: C4
|