diff options
| -rw-r--r-- | share/man/man4/icmp.4 | 6 | ||||
| -rw-r--r-- | sys/netinet/ip_icmp.c | 6 |
2 files changed, 11 insertions, 1 deletions
diff --git a/share/man/man4/icmp.4 b/share/man/man4/icmp.4 index 6b7f78e..c0f51b3 100644 --- a/share/man/man4/icmp.4 +++ b/share/man/man4/icmp.4 @@ -28,7 +28,7 @@ .\" @(#)icmp.4 8.1 (Berkeley) 6/5/93 .\" $FreeBSD$ .\" -.Dd February 9, 2007 +.Dd September 30, 2014 .Dt ICMP 4 .Os .Sh NAME @@ -216,6 +216,10 @@ instead of the possibly different return path. Number of bytes from original packet to quote in ICMP reply. This number is internally enforced to be at least 8 bytes (per RFC792) and at most the maximal space left in the ICMP reply mbuf. +.It Va tstamprepl +.Pq Vt boolean +Enable/disable replies to ICMP Timestamp packets. +Defaults to true. .El .Sh ERRORS A socket operation may fail with one of the following errors returned: diff --git a/sys/netinet/ip_icmp.c b/sys/netinet/ip_icmp.c index 0073643..e5d32f0 100644 --- a/sys/netinet/ip_icmp.c +++ b/sys/netinet/ip_icmp.c @@ -149,6 +149,10 @@ SYSCTL_VNET_INT(_net_inet_icmp, OID_AUTO, bmcastecho, CTLFLAG_RW, &VNET_NAME(icmpbmcastecho), 0, ""); +static VNET_DEFINE(int, icmptstamprepl) = 1; +#define V_icmptstamprepl VNET(icmptstamprepl) +SYSCTL_INT(_net_inet_icmp, OID_AUTO, tstamprepl, CTLFLAG_RW, + &VNET_NAME(icmptstamprepl), 0, "Respond to ICMP Timestamp packets"); #ifdef ICMPPRINTFS int icmpprintfs = 0; @@ -545,6 +549,8 @@ icmp_input(struct mbuf **mp, int *offp, int proto) goto reflect; case ICMP_TSTAMP: + if (V_icmptstamprepl == 0) + break; if (!V_icmpbmcastecho && (m->m_flags & (M_MCAST | M_BCAST)) != 0) { ICMPSTAT_INC(icps_bmcasttstamp); |
