Andrew Thompson 7f87a57ca3 Add support for fragmenting ipv4 packets.
The packet filter may reassemble the ip fragments and return a packet that is
larger than the MTU of the sending interface. There is no check for DF or icmp
replies as we can only get a large packet to fragment by reassembling a
previous fragment, and this only happens after a call to pfil(9).

Obtained from:	OpenBSD (mostly)
Glanced at by:	mlaier
MFC after:	1 month
2006-04-29 05:37:25 +00:00
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