From c4c748a46516f34de7c94774388a4ffbbf7421da Mon Sep 17 00:00:00 2001
From: "Tristan B. Velloza Kildaire" <deavmi@redxen.eu>
Date: Thu, 19 Dec 2024 08:45:44 +0200
Subject: [PATCH] tncattach

- Only allow prefix length of between 0 to 128
---
 tncattach.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tncattach.c b/tncattach.c
index 04041eb..802ff74 100644
--- a/tncattach.c
+++ b/tncattach.c
@@ -508,6 +508,11 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
 								printf("Prefix length '%s' is not numeric\n", prefixPart_s);
 								exit(EXIT_FAILURE);
 						}
+						else if(!(prefixLen_l >= 0 && prefixLen_l <= 128))
+						{
+								printf("Prefix length '%s' is not within valid range of 0-128\n", prefixPart_s);
+								exit(EXIT_FAILURE);
+						}
 
             arguments->ipv6 = ipPart_s;