From 5b7dc00335f81d96ba5e44d5cd10c4f4ed5371ba Mon Sep 17 00:00:00 2001
From: zhenwei pi <pizhenwei@bytedance.com>
Date: Mon, 6 Jan 2020 10:00:37 +0800
Subject: [PATCH] Exit program when invalid TTL option

Suggested by Jim, tcpping should exit when user input an invalid ttl.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
---
 tcpping.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tcpping.c b/tcpping.c
index dd2d3e1..12e5b39 100644
--- a/tcpping.c
+++ b/tcpping.c
@@ -790,6 +790,7 @@ int main(int argc, char *argv[])
 				ttl = atoi(optarg);
 				if (ttl < 1 || ttl > 255) {
 					fprintf(stderr, "Invalid TTL\n");
+					exit(1);
 				}
 				break;
 			case 'v':