linux-dev/net/mac80211/scan.c, branch linus/master

mac80211: upgrade passive scan to active scan on DFS channels after beacon rx

2022-05-04T20:49:38Z

In client mode, we can't connect to hidden SSID APs or SSIDs not advertised in beacons on DFS channels, since we're forced to passive scan. Fix this by sending out a probe request immediately after the first beacon, if active scan was requested by the user. Cc: stable@vger.kernel.org Reported-by: Catrinel Catrinescu Signed-off-by: Felix Fietkau Link: https://lore.kernel.org/r/20220420104907.36275-1-nbd@nbd.name Signed-off-by: Johannes Berg

mac80211: always allocate struct ieee802_11_elems

2021-09-23T14:27:07Z

As the 802.11 spec evolves, we need to parse more and more elements. This is causing the struct to grow, and we can no longer get away with putting it on the stack. Change the API to always dynamically allocate and return an allocated pointer that must be kfree()d later. As an alternative, I contemplated a scheme whereby we'd say in the code which elements we needed, e.g. DECLARE_ELEMENT_PARSER(elems, SUPPORTED_CHANNELS, CHANNEL_SWITCH, EXT(KEY_DELIVERY)); ieee802_11_parse_elems(..., &elems, ...); and while I think this is possible and will save us a lot since most individual places only care about a small subset of the elements, it ended up being a bit more work since a lot of places do the parsing and then pass the struct to other functions, sometimes with multiple levels. Link: https://lore.kernel.org/r/20210920154009.26caff6b5998.I05ae58768e990e611aee8eca8abefd9d7bc15e05@changeid Signed-off-by: Johannes Berg

mac80211: fix skb length check in ieee80211_scan_rx()

2021-05-31T19:39:10Z

Replace hard-coded compile-time constants for header length check with dynamic determination based on the frame type. Otherwise, we hit a validation WARN_ON in cfg80211 later. Fixes: cd418ba63f0c ("mac80211: convert S1G beacon to scan results") Reported-by: syzbot+405843667e93b9790fc1@syzkaller.appspotmail.com Signed-off-by: Du Cheng Link: https://lore.kernel.org/r/20210510041649.589754-1-ducheng2@gmail.com [style fixes, reword commit message] Signed-off-by: Johannes Berg

mac80211: convert S1G beacon to scan results

2020-09-28T11:53:25Z

This commit finds the correct offset for Information Elements in S1G beacon frames so they can be reported in scan results. Signed-off-by: Thomas Pedersen Link: https://lore.kernel.org/r/20200922022818.15855-8-thomas@adapt-ip.com Signed-off-by: Johannes Berg

mac80211: s1g: choose scanning width based on frequency

2020-09-28T11:53:05Z

An S1G BSS can beacon at either 1 or 2 MHz and the channel width is unique to a given frequency. Ignore scan channel width for now and use the allowed channel width. Signed-off-by: Thomas Pedersen Link: https://lore.kernel.org/r/20200922022818.15855-3-thomas@adapt-ip.com Signed-off-by: Johannes Berg

nl80211/cfg80211: support 6 GHz scanning

2020-09-28T11:53:04Z

Support 6 GHz scanning, by * a new scan flag to scan for colocated BSSes advertised by (and found) APs on 2.4 & 5 GHz * doing the necessary reduced neighbor report parsing for this, to find them * adding the ability to split the scan request in case the device by itself cannot support this. Also add some necessary bits in mac80211 to not break with these changes. Signed-off-by: Tova Mussai Signed-off-by: Johannes Berg Link: https://lore.kernel.org/r/20200918113313.232917c93af9.Ida22f0212f9122f47094d81659e879a50434a6a2@changeid Signed-off-by: Johannes Berg

mac80211: remove unused flags argument in transmit functions

2020-07-31T07:27:01Z

The flags argument in transmit functions is no longer being used and can be removed. Signed-off-by: Mathy Vanhoef Link: https://lore.kernel.org/r/20200723100153.31631-5-Mathy.Vanhoef@kuleuven.be Signed-off-by: Johannes Berg

mac80211: use same flag everywhere to avoid sequence number overwrite

2020-07-31T07:27:01Z

Use the IEEE80211_TX_CTRL_NO_SEQNO flag in ieee80211_tx_info to mark probe requests whose sequence number must not be overwritten. This provides consistency with the radiotap flag that can be set to indicate that the sequence number of an injected frame should not be overwritten. Signed-off-by: Mathy Vanhoef Link: https://lore.kernel.org/r/20200723100153.31631-4-Mathy.Vanhoef@kuleuven.be Signed-off-by: Johannes Berg

nl80211: S1G band and channel definitions

2020-07-31T07:24:13Z

Gives drivers the definitions needed to advertise support for S1G bands. Signed-off-by: Thomas Pedersen Link: https://lore.kernel.org/r/20200602062247.23212-1-thomas@adapt-ip.com Link: https://lore.kernel.org/r/20200731055636.795173-1-thomas@adapt-ip.com Signed-off-by: Johannes Berg

mac80211: Add HE 6GHz capabilities element to probe request

2020-05-31T09:27:05Z

On 6 GHz, the 6 GHz capabilities element should be added, do that. Signed-off-by: Ilan Peer [add commit message] Link: https://lore.kernel.org/r/20200528213443.8ee764f0cde0.I2b0c66b60e11818c97c9803e04a6a197c6376243@changeid Signed-off-by: Johannes Berg