Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Handle RFC 5227 ARP probes properly, don't drop 0.0.0.0 source packets 

silently. (Patrik Lahti <plahti at qnx dot com>)
This commit is contained in:
christos 2009-11-03 00:57:42 +00:00
parent cef5c322c2
commit 6cd198d078
1 changed files with 10 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
sys/netinet/if_arp.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: if_arp.c,v 1.147 2009/09/16 15:23:04 pooka Exp $ */
/* $NetBSD: if_arp.c,v 1.148 2009/11/03 00:57:42 christos Exp $ */
/*-
* Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc.
@ -68,7 +68,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.147 2009/09/16 15:23:04 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.148 2009/11/03 00:57:42 christos Exp $");
#include "opt_ddb.h"
#include "opt_inet.h"
@ -968,15 +968,6 @@ in_arpinput(struct mbuf *m)
goto out;
}
/*
* If the source IP address is zero, this is most likely a
* confused host trying to use IP address zero. (Windoze?)
* XXX: Should we bother trying to reply to these?
*/
if (in_nullhost(isaddr)) {
ARP_STATINC(ARP_STAT_RCVZEROSPA);
goto out;
}
/*
* Search for a matching interface address
@ -1054,6 +1045,14 @@ in_arpinput(struct mbuf *m)
goto out;
}
/*
* If the source IP address is zero, this is an RFC 5227 ARP probe
*/
if (in_nullhost(isaddr)) {
ARP_STATINC(ARP_STAT_RCVZEROSPA);
goto reply;
}
if (in_hosteq(isaddr, myaddr)) {
ARP_STATINC(ARP_STAT_RCVLOCALSPA);
log(LOG_ERR,