=== guest setup ===
 4    1 0xffffffff82600000   1cf000 pf.ko
pfctl: pf already enabled
ifconfig: interface pfsync0 already exists

=== before injection: netstat -s protocols ===
tcp:
udp:
ip:
icmp:
igmp:
carp:
ip6:
icmp6:

=== dmesg line count before ===
before=     132

=== inject proto-240 CLR packet (spoofed 10.0.2.99 -> 224.0.0.240) ===
sent 64 bytes: 10.0.2.99 -> 224.0.0.240  proto=240 ttl=255 act=CLR creatorid=0xdeadbeef

=== dmesg after (UNCHANGED = no kernel response) ===
after=     132
pid 889 (kgdb), uid 0: exited on signal 11 (core dumped)
vtnet0: promiscuous mode enabled
vtnet0: promiscuous mode disabled

=== netstat -s protocols after (still NO pfsync => handler not registered) ===
tcp:
udp:
ip:
icmp:
igmp:
carp:
ip6:
icmp6:

=== nm static kernel: pfsync_input present? ===
pfsync_input: ABSENT from static kernel