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From: Xin LI <delphij@FreeBSD.org>
Date: Mon, 28 Jul 2014 08:22:08 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r269180 - head/sbin/ping6
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Author: delphij
Date: Mon Jul 28 08:22:08 2014
New Revision: 269180
URL: http://svnweb.freebsd.org/changeset/base/269180

Log:
  When interval is set to very small value with limited amount of packets,
  ping6(8) would quit before the remote side gets a chance to respond.
  
  Solve this by resetting the itimer when we have reached the maximum packet
  number have reached, but let the other handling to continue.
  
  PR:		bin/151023
  Submitted by:	tjmao at tjmao.net
  MFC after:	2 weeks

Modified:
  head/sbin/ping6/ping6.c

Modified: head/sbin/ping6/ping6.c
==============================================================================
--- head/sbin/ping6/ping6.c	Mon Jul 28 07:20:22 2014	(r269179)
+++ head/sbin/ping6/ping6.c	Mon Jul 28 08:22:08 2014	(r269180)
@@ -1090,8 +1090,14 @@ main(int argc, char *argv[])
 		/* signal handling */
 		if (seenalrm) {
 			/* last packet sent, timeout reached? */
-			if (npackets && ntransmitted >= npackets)
-				break;
+			if (npackets && ntransmitted >= npackets) {
+				struct timeval zerotime = {0, 0};
+				itimer.it_value = zerotime;
+				itimer.it_interval = zerotime;
+				(void)setitimer(ITIMER_REAL, &itimer, NULL);
+				seenalrm = 0;   /* clear flag */
+				continue;
+			}
 			retransmit();
 			seenalrm = 0;
 			continue;