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BACKPORT: wifi: nl80211/mac80211: clarify link ID in control port TX

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Clarify the link ID behaviour in control port TX, we need it
to select the link to transmit on for both MLD and non-MLD
receivers, but select the link address as the SA only if the
receiver is not an MLD.

Fixes: 67207bab9341 ("wifi: cfg80211/mac80211: Support control port TX from specific link")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Bug: 253289327
Change-Id: Ia0884899da06d0ed9109922b8f2144d261782b4c
(cherry picked from commit 9dd1953846c7cd58100a5c6bd90db54e2c60668a)
[Kiran Kumar Lokere: Skipped the changes in net/mac80211/tx.c]
Signed-off-by: Kiran Kumar Lokere <quic_klokere@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
This commit is contained in:
Johannes Berg
2022-07-19 10:26:50 +02:00
committed by Todd Kjos
parent dfdfc3041e
commit 6d81ebd631
1 changed files with 6 additions and 0 deletions
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6
include/uapi/linux/nl80211.h
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@@ -1127,6 +1127,12 @@
* has been received. %NL80211_ATTR_FRAME is used to specify the
* frame contents. The frame is the raw EAPoL data, without ethernet or
* 802.11 headers.
* For an MLD transmitter, the %NL80211_ATTR_MLO_LINK_ID may be given and
* its effect will depend on the destination: If the destination is known
* to be an MLD, this will be used as a hint to select the link to transmit
* the frame on. If the destination is not an MLD, this will select both
* the link to transmit on and the source address will be set to the link
* address of that link.
* When used as an event indication %NL80211_ATTR_CONTROL_PORT_ETHERTYPE,
* %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT and %NL80211_ATTR_MAC are added
* indicating the protocol type of the received frame; whether the frame