commit 66b793822d475bb40aa370c9ef7fc0499b22a5e2
Author: Jan Synacek <jsynacek@redhat.com>
Date:   Thu Feb 23 12:59:46 2017 +0100

    arping: exit if network disappears while running
    
    Originally reported at https://bugzilla.redhat.com/show_bug.cgi?id=1387542

diff --git a/arping.c b/arping.c
index 1a3f40b..dce8f7b 100644
--- a/arping.c
+++ b/arping.c
@@ -1227,6 +1227,8 @@ main(int argc, char **argv)
 		if ((cc = recvfrom(s, packet, sizeof(packet), 0,
 				   (struct sockaddr *)&from, &alen)) < 0) {
 			perror("arping: recvfrom");
+			if (errno == ENETDOWN)
+				exit(2);
 			continue;
 		}