From d7501edd91bcaed87673aaeb1b488f6680bf6431 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sun, 3 Oct 1999 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1999-10-03

---
 ip/ip.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/ip/ip.c b/ip/ip.c
index 778ec984f75e21dd36ab70c0ba72fd0d8087ca5d..97a49d72aa9ffc38c526ed1abccfc4a6730f762e 100644
--- a/ip/ip.c
+++ b/ip/ip.c
@@ -180,7 +180,16 @@ ipoput(Fs *f, Block *bp, int gating, int ttl, int tos)
 	else
 		gate = r->v4.gate;
 
-	if(!gating){
+	if(gating){
+		switch(eh->ttl){
+		case 0:
+		case 1:
+			goto free;
+		default:
+			eh->ttl--;
+			break;
+		}
+	} else {
 		eh->vihl = IP_VER|IP_HLEN;
 		eh->ttl = ttl;
 		eh->tos = tos;