From b011f9fd8f882b7737f7d32d8c455ddcf13455ab Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Sat, 17 Aug 1996 10:37:28 +0000
Subject: [PATCH] Fixes from NetBSD:  - inet_ntoa() returns a pointer to a
 static buffer, dont use it twice    in the same printf().  - prevent the
 possibility of never timing out  - Report two more ICMP error types
 (prohibited nets etc) And some (commented out) enhancements that I use, but
 some don't like.

---
 usr.sbin/traceroute/Makefile     |  5 ++++
 usr.sbin/traceroute/traceroute.c | 39 ++++++++++++++++++++++++++++----
 2 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/usr.sbin/traceroute/Makefile b/usr.sbin/traceroute/Makefile
index b9d6c20c89f3..337f1294e64d 100644
--- a/usr.sbin/traceroute/Makefile
+++ b/usr.sbin/traceroute/Makefile
@@ -6,4 +6,9 @@ BINOWN=	root
 BINMODE=4555
 CFLAGS+=-DHAVE_BZERO=1 -DHAVE_SETLINEBUF=1
 
+# RTT Jitter on the internet these days means printing 3 decimal places on
+# > 1000ms times is plain useless.  Uncomment this to enable variable precision
+# reporting, ie: print a variable precision from 0.001ms through 1000ms
+# CFLAGS+=-DSANE_PRECISION
+
 .include <bsd.prog.mk>
diff --git a/usr.sbin/traceroute/traceroute.c b/usr.sbin/traceroute/traceroute.c
index e39be381b597..7df7b726fdba 100644
--- a/usr.sbin/traceroute/traceroute.c
+++ b/usr.sbin/traceroute/traceroute.c
@@ -1,6 +1,6 @@
 #ifndef lint
 static char *rcsid =
-    "@(#)$Header: /home/ncvs/src/usr.sbin/traceroute/traceroute.c,v 1.6 1996/08/09 06:00:53 fenner Exp $ (LBL)";
+    "@(#)$Header: /home/ncvs/src/usr.sbin/traceroute/traceroute.c,v 1.7 1996/08/13 16:28:59 fenner Exp $ (LBL)";
 #endif
 
 /*
@@ -564,12 +564,35 @@ main(int argc, char **argv)
 			send_probe(++seq, ttl, &t1);
 			while ((cc = wait_for_reply(s, &from, &t1)) != 0) {
 				(void) gettimeofday(&t2, &tz);
+				/*
+				 * Since we'll be receiving all ICMP
+				 * messages to this host above, we may
+				 * never end up with cc=0, so we need
+				 * an additional termination check.
+				 */
+				if (t2.tv_sec - t1.tv_sec > waittime) {
+					cc = 0;
+					break;
+				}
 				if ((i = packet_ok(packet, cc, &from, seq))) {
+					double T;
+					int precis;
 					if (from.sin_addr.s_addr != lastaddr) {
 						print(packet, cc, &from);
 						lastaddr = from.sin_addr.s_addr;
 					}
-					Printf("  %.3f ms", deltaT(&t1, &t2));
+					T = deltaT(&t1, &t2);
+#ifdef SANE_PRECISION
+					if (T >= 1000.0)
+						precis = 0;
+					else if (T >= 100.0)
+						precis = 1;
+					else if (T >= 10.0)
+						precis = 2;
+					else
+#endif
+						precis = 3;
+					Printf("  %.*f ms", precis, T);
 					switch(i - 1) {
 					case ICMP_UNREACH_PORT:
 #ifndef ARCHAIC
@@ -599,6 +622,14 @@ main(int argc, char **argv)
 						++unreachable;
 						Printf(" !S");
 						break;
+					case ICMP_UNREACH_NET_PROHIB:
+						++unreachable;
+						Printf(" !A");
+						break;
+					case ICMP_UNREACH_HOST_PROHIB:
+						++unreachable;
+						Printf(" !C");
+						break;
 					}
 					break;
 				}
@@ -737,8 +768,8 @@ packet_ok(u_char *buf, int cc, struct sockaddr_in *from, int seq)
 		int i;
 		u_long *lp = (u_long *)&icp->icmp_ip;
 
-		Printf("\n%d bytes from %s to %s", cc,
-			inet_ntoa(from->sin_addr), inet_ntoa(ip->ip_dst));
+		Printf("\n%d bytes from %s", cc, inet_ntoa(from->sin_addr));
+		Printf(" to %s", inet_ntoa(ip->ip_dst));
 		Printf(": icmp type %d (%s) code %d\n", type, pr_type(type),
 		       icp->icmp_code);
 		for (i = 4; i < cc ; i += sizeof(long))