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Fix VNET - DAD detected duplicate IPv6 address

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Assign a hopefully unique, locally administered etheraddr. - for
epairNa & epairNb

Submitted by:	Catalin <sslevil@users.noreply.github.com>
Pull Request:	https://github.com/freebsd/freebsd/pull/92
This commit is contained in:
Warner Losh 2017-03-01 04:47:22 +00:00
parent 62f32e06bc
commit 7d85b06ecf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=314471
1 changed files with 2 additions and 0 deletions
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2
sys/net/if_epair.c
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@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$");
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/libkern.h>
#include <net/bpf.h>
#include <net/ethernet.h>
@ -724,6 +725,7 @@ epair_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params)
ifp = scb->ifp;
/* Assign a hopefully unique, locally administered etheraddr. */
eaddr[0] = 0x02;
eaddr[1] = arc4random() & 0xff;
eaddr[3] = (ifp->if_index >> 8) & 0xff;
eaddr[4] = ifp->if_index & 0xff;
eaddr[5] = 0x0b;