pf tests: fix plfow:v6 after scapy-2.6.0 update

Avoid receiving ICMPv6 destination unreachable packets, because scapy will
attempt to parse the pflow information from those (partial) packets as well

pf tests: fix plfow:v6 after scapy-2.6.0 update

Avoid receiving ICMPv6 destination unreachable packets, because scapy will
attempt to parse the pflow information from those (partial) packets as well, and
then get confused.

MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")

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pf tests: test pflow NAT state information

pflow(4) now also exports NAT session creation/destruction information.
Test that this works as expected.

While here improve the parsing of ipfix (i.e. pf

pf tests: test pflow NAT state information

pflow(4) now also exports NAT session creation/destruction information.
Test that this works as expected.

While here improve the parsing of ipfix (i.e. pflowproto 10) a bit, and
check more information for the existing state information exports.

Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D43117

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pf tests: pflow functionality test

Test that we actually send netflow messages when configured to do so.
We do not yet inspect the generated netflow messages.

Sponsored by: Rubicon Communications,

pf tests: pflow functionality test

Test that we actually send netflow messages when configured to do so.
We do not yet inspect the generated netflow messages.

Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D43111

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