Mike Karels 184291b0a5 genet: pullup minimum header amount for IPv4 ... The genet driver (RPi4 Ethernet) had code to pull headers into the first mbuf if there was only an Ethernet header there. This was originally needed for ICMPv6 replies, then for forwarded IPv6/TCP. Now a situation has been found where it is needed for IPv4, when using NAT with IPFW. Generalize to do this for all protocols. Rather than using an IPv6-related definition for the length, move the length to a variable that can be set with sysctl (hw.genet.tx_hdr_min). Move an old tunable to a new RDTUN variable with a better name. PR: 25607 MFC after: 3 days Reviewers: emaste Differential Revision: https://reviews.freebsd.org/D30831		2021-06-26 11:04:02 -05:00
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genet	genet: pullup minimum header amount for IPv4	2021-06-26 11:04:02 -05:00