K 10
svn:author
V 2
np
K 8
svn:date
V 27
2020-09-18T02:21:15.472066Z
K 7
svn:log
V 526
Add a knob to allow zero UDP checksums for UDP/IPv6 traffic on the given UDP port.

This will be used by some upcoming changes to if_vxlan(4).  RFC 7348 (VXLAN)
says that the UDP checksum "SHOULD be transmitted as zero.  When a packet is
received with a UDP checksum of zero, it MUST be accepted for decapsulation."
But the original IPv6 RFCs did not allow zero UDP checksum.  RFC 6935 attempts
to resolve this.

Reviewed by:	kib@
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D25873

END