CVS commit: src/sys/netinet

["Roy Marples" <roy%netbsd.org@localhost>]

Module Name:    src
Committed By:   roy
Date:           Mon Nov 14 09:32:21 UTC 2022

Modified Files:
        src/sys/netinet: if_arp.c

Log Message:
arp: Validate L2 sender hardware address matches ARP probe

RFC 5227 section 1.1 states that for a DaD ARP probe the sender hardware
address must match the hardware address of the interface sending the
packet.

We can now verify this by checking the mbuf packet header.

This fixes an obsure issue where an old router was sending out bogus
ARP probes.


To generate a diff of this commit:
cvs rdiff -u -r1.308 -r1.309 src/sys/netinet/if_arp.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.