From 442c17d972c6e9f9b9e8f0c7f70c59c73ae46cae Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 3 Jul 2001 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2001-07-03

---
 ip/icmp.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/ip/icmp.c b/ip/icmp.c
index 14125ef9429852ecd0ccc0c7acf59054d74124ee..b1c90c49e5b3935c1107226d0a8abaaaade9f0d5 100644
--- a/ip/icmp.c
+++ b/ip/icmp.c
@@ -44,6 +44,11 @@ enum {			/* Packet Types */
 	Maxtype		= 18,
 };
 
+enum
+{
+	MinAdvise	= 24,	/* minimum needed for us to advise another protocol */ 
+};
+
 char *icmpnames[Maxtype+1] =
 {
 [EchoReply]		"EchoReply",
@@ -345,7 +350,7 @@ icmpiput(Proto *icmp, Ipifc*, Block *bp)
 			msg = unreachcode[p->code];
 
 		bp->rp += ICMP_IPSIZE+ICMP_HDRSIZE;
-		if(blocklen(bp) < 8){
+		if(blocklen(bp) < MinAdvise){
 			ipriv->stats[LenErrs]++;
 			goto raise;
 		}
@@ -364,7 +369,7 @@ icmpiput(Proto *icmp, Ipifc*, Block *bp)
 			sprint(m2, "ttl exceeded at %V", p->src);
 
 			bp->rp += ICMP_IPSIZE+ICMP_HDRSIZE;
-			if(blocklen(bp) < 8){
+			if(blocklen(bp) < MinAdvise){
 				ipriv->stats[LenErrs]++;
 				goto raise;
 			}