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[lwip-devel] RFC3542 ICMPv6 Checksum Computation for Raw Sockets

From: Grant Erickson
Subject: [lwip-devel] RFC3542 ICMPv6 Checksum Computation for Raw Sockets
Date: Wed, 19 Dec 2012 09:21:15 -0800

I am implementing a basic ping6 test application for LwIP using a:

        socket = lwip_socket(AF_INET6, SOCK_RAW, IP6_NEXTH_ICMP6); 

raw LWIP socket and it's mostly working, with checksum computation excepted. 
Per RFC3542 <http://www.ietf.org/rfc/rfc3542.txt>, "3.1. Checksums", outside of 
link-local addresses, for which a priori knowledge is fairly straightforward, 
the source address for pseudo-header checksum computation isn't easily derived 
from the application socket.

Have there been any strong opinions or directions toward supporting a raw IPv6 
checksum computation ala a socket option?



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