K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2021-12-12T18:12:21.135610Z
K 7
svn:log
V 967
if_pflog: fix packet length

There were two issues with the new pflog packet length.
The first is that the length is expected to be a multiple of
sizeof(long), but we'd assumed it had to be a multiple of
sizeof(uint32_t).

The second is that there's some broken software out there (such as
Wireshark) that makes incorrect assumptions about the amount of padding.
That is, Wireshark assumes there's always three bytes of padding, rather
than however much is needed to get to a multiple of sizeof(long).

Fix this by adding extra padding, and a fake field to maintain
Wireshark's assumption.

Reported by:	Ozkan KIRIK <ozkan.kirik@gmail.com>
Tested by:	Ozkan KIRIK <ozkan.kirik@gmail.com>
MFC after:	1 week
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D33236

(cherry picked from commit 6d4baa0d011cb3e78b4b08415568e71c0aab00fe)

Git Hash:   d41caea44ba9f676b72d9a27d53de520ef61e196
Git Author: kp@FreeBSD.org
END