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Bartlomiej Grzesik authored
Discard and send ICMPv6 Packet Too Big to sender when we try to encapsulate and forward a packet which total length exceeds the PMTU. Logic is based on the IPv4 implementation. Common code was moved to a separate function. Differential revision: https://reviews.freebsd.org/D31771 Obtained from: Semihalf Sponsored by: Stormshield
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