netdev - Re: [PATCH net-next] netlink: add igmp join/leave notifications

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Message-ID: <CADXeF1HMvDnKNSNCh1ULsspC+gR+S0eTE40MRhA+OH16zJKM6A@mail.gmail.com>
Date: Wed, 13 Nov 2024 09:56:17 +0900
From: Yuyang Huang <yuyanghuang@...gle.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Hangbin Liu <liuhangbin@...il.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Simon Horman <horms@...nel.org>, David Ahern <dsahern@...nel.org>, roopa@...ulusnetworks.com, 
	jiri@...nulli.us, stephen@...workplumber.org, netdev@...r.kernel.org, 
	Maciej Żenczykowski <maze@...gle.com>, 
	Lorenzo Colitti <lorenzo@...gle.com>
Subject: Re: [PATCH net-next] netlink: add igmp join/leave notifications

> Please could you say more about programming hardware offload filters?
> How is this done?

Sure,  please let me explain a little bit further on how Android
Packet Filter (APF) works here.

The Android Packet Filter (APF) has two parts:
* APF Interpreter: Runs on the Wi-Fi chipset and executes APF
programs(bytecodes) to decide whether to accept, drop, or reply to
incoming packets.
* APF program generator: Resides in the Android Framework within the
Network Stack process. It creates and updates APF programs based on
network conditions and device state, allowing for dynamic adjustments
to the filtering rules.
APF program generator is part of the Network Stack module, which can
be updated with monthly mainline releases.

Feel free to let me know if the above explanation is still unclear.

I will include a more detailed explanation in the commit message in patch v2.

Thanks,
Yuyang

On Wed, Nov 13, 2024 at 4:34 AM Andrew Lunn <andrew@...n.ch> wrote:
>
> > > This enhancement allows user-space components to efficiently track
> > > multicast group memberships and program hardware offload filters
> > > accordingly.
>
> Sorry, i missed the original posting.
>
> Please could you say more about programming hardware offload filters?
> How is this done?
>
>         Andrew