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authorDavid Gibson <david@gibson.dropbear.id.au>2022-10-19 11:43:52 +1100
committerStefano Brivio <sbrivio@redhat.com>2022-10-19 03:34:45 +0200
commitf616ca231e1c6dc9256f999f868bb973d744104a (patch)
treeabca6fe5dc318196eab6cdf1e4885d7d36a02754 /contrib
parentfb5d1c5d7d0b914a90aaeecf406c7092d9d55aeb (diff)
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Split tap_ip_send() into IPv4 and IPv6 specific functions
The IPv4 and IPv6 paths in tap_ip_send() have very little in common, and it turns out that every caller (statically) knows if it is using IPv4 or IPv6. So split into separate tap_ip4_send() and tap_ip6_send() functions. Use a new tap_l2_hdr() function for the very small common part. While we're there, make some minor cleanups: - We were double writing some fields in the IPv6 header, so that it temporary matched the pseudo-header for checksum calculation. With recent checksum reworks, this isn't neccessary any more. - We don't use any IPv4 header options, so use some sizeof() constructs instead of some open coded values for header length. - The comment used to say that the flow label was for TCP over IPv6, but in fact the only thing we used it for was DHCPv6 over UDP traffic Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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