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Re: [lwip-users] why NA message is sent to upper layer by raw_input


From: Simon Goldschmidt
Subject: Re: [lwip-users] why NA message is sent to upper layer by raw_input
Date: Tue, 4 Jun 2019 08:58:29 +0200

"Grace" wrote:
> I'm using lwip2.1.2 to implement ping ipv6 feature,
> [..]
> So why NA in IPv6 is passed to IP layer?

In the IPv4, ARP has its own ethtype, so ARP packets are of course
not sent to IP.

In contrast, in IPv6 world, address resolution is implemented on
top of IPv6 instead of having its own ethtype, so naturally,
raw IP access gets those frames, too.

Regards,
Simon



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