arping: fix -f quit on first reply regressionbugfix-211

When arping runs together with -f 'quit on first reply' and -w <timeout>
'how long to wait for a reply' the command needs to exit if replies are not
received after wait period.  Notice that the exit in case of lost packages
will be 1 signifying failure.  Getting a reply results to 0 exit value.

Addresses: https://bugs.debian.org/935946
Reported-by: Lucas Nussbaum <lucas@debian.org>
Addresses: https://github.com/iputils/iputils/issues/211
Reported-by: Noah Meyerhans <noahm@debian.org>
Broken-since: 67e070d08dcbec990e1178360f82b3e2ca4f6d5f
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

1 files changed, 2 insertions, 1 deletions

diff --git a/arping.c b/arping.c
index 2c87c15..30884f6 100644
--- a/arping.c
+++ b/arping.c
@@ -764,7 +764,8 @@ static int event_loop(struct run_state *ctl)
 					continue;
 				}
 				total_expires += exp;
-				if (0 < ctl->count && (uint64_t)ctl->count < total_expires) {
+				if ((0 < ctl->count && (uint64_t)ctl->count < total_expires) ||
+				    (ctl->quit_on_reply && ctl->timeout < total_expires)) {
 					exit_loop = 1;
 					continue;
 				}