system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-10-06 00:20:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add a knob to suppress logging of attempts to modify

Browse source 
permanent ARP entries.

Submitted by:	Andrew Alcheyev <buddy telenet.ru>
This commit is contained in:
Gleb Smirnoff 2005-12-18 19:11:56 +00:00
parent d147662cd3
commit 3939390679
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=153513
2 changed files with 19 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
sys/netinet/if_ether.c
View file

@ -570,6 +570,7 @@ arpintr(struct mbuf *m)
*/
static int log_arp_wrong_iface = 1;
static int log_arp_movements = 1;
static int log_arp_permanent_modify = 1;
SYSCTL_INT(_net_link_ether_inet, OID_AUTO, log_arp_wrong_iface, CTLFLAG_RW,
&log_arp_wrong_iface, 0,
@ -577,6 +578,9 @@ SYSCTL_INT(_net_link_ether_inet, OID_AUTO, log_arp_wrong_iface, CTLFLAG_RW,
SYSCTL_INT(_net_link_ether_inet, OID_AUTO, log_arp_movements, CTLFLAG_RW,
&log_arp_movements, 0,
"log arp replies from MACs different than the one in the cache");
SYSCTL_INT(_net_link_ether_inet, OID_AUTO, log_arp_permanent_modify, CTLFLAG_RW,
&log_arp_permanent_modify, 0,
"log arp replies from MACs different than the one in the permanent arp entry");
static void
@ -721,12 +725,13 @@ in_arpinput(m)
ifp->if_addrlen, (u_char *)ar_sha(ah), ":",
ifp->if_xname);
} else {
log(LOG_ERR,
"arp: %*D attempts to modify permanent entry for %s on %s\n",
ifp->if_addrlen, (u_char *)ar_sha(ah), ":",
inet_ntoa(isaddr), ifp->if_xname);
RT_UNLOCK(rt);
goto reply;
RT_UNLOCK(rt);
if (log_arp_permanent_modify)
log(LOG_ERR, "arp: %*D attempts to modify "
"permanent entry for %s on %s\n",
ifp->if_addrlen, (u_char *)ar_sha(ah), ":",
inet_ntoa(isaddr), ifp->if_xname);
goto reply;
}
}
/*

9
usr.sbin/arp/arp.4
View file

@ -28,7 +28,7 @@
.\" @(#)arp4.4 6.5 (Berkeley) 4/18/94
.\" $FreeBSD$
.\"
.Dd November 24, 2005
.Dd December 18, 2005
.Dt ARP 4
.Os
.Sh NAME
@ -169,6 +169,13 @@ to if1.
This message can only be issued if the sysctl
.Va net.link.ether.inet.log_arp_wrong_iface
is set to 1, which is the system's default behaviour.
.Pp
.Em "arp: %x:%x:%x:%x:%x:%x attempts to modify permanent entry for %d.%d.%d.%d on %s" :
ARP has received an ARP reply that attempts to overwrite a permanent
antry in the local ARP table.
This error will be only logged, if the sysctl
.Va net.link.ether.inet.log_arp_permanent_modify
is set to 1, which is the system's default behaviour.
.Sh SEE ALSO
.Xr inet 4 ,
.Xr route 4 ,