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nat64: Get the IPv4 address from a NAT64 address when comparing addresses in a ICMP translate
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Authored by neel_neelc.org on Feb 17 2020, 9:43 PM.

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ae
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nat64: Get the IPv4 address from an IPv6 NAT64 address when comparing a source address with a destination address in an ICMP translate.

Submitted by: Neel Chauhan <neel AT neelc DOT org>

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ae requested changes to this revision.Feb 18 2020, 8:15 AM

The patch is not correct. IPv4 address can be embedded in different places depending from configuration.

This revision now requires changes to proceed.Feb 18 2020, 8:15 AM
neel_neelc.org edited the summary of this revision. (Show Details)

Here, I also compare the destination addresses. Is this what you want?

Here, I also compare the destination addresses. Is this what you want?

No, take a look at RFC 6052 p2.2..

Also, how did test your changes? :)
NAT64 currently is not widely used, thus changes here can break something and you will know about breakage when it will be not so easy to fix, e.g. after release.

I decided to use the existing function nat64_extract_ip4() to extract the IPv4 and removed my nat64_get_ip4().

I'm new to the FreeBSD TCP/IP stack, sorry.