From 55a3a94065dea2fa3edb3ac73156a05bd1d47426 Mon Sep 17 00:00:00 2001
From: ValdikSS <iam@valdikss.org.ru>
Date: Sun, 6 Mar 2022 00:22:22 +0300
Subject: [PATCH] Handle "0" in domain names

---
 src/goodbyedpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/goodbyedpi.c b/src/goodbyedpi.c
index 8fa7313..cfa2ac8 100644
--- a/src/goodbyedpi.c
+++ b/src/goodbyedpi.c
@@ -415,7 +415,7 @@ static int extract_sni(const char *pktdata, unsigned int pktlen,
                 }
                 /* Validate that hostname has only ascii lowercase characters */
                 for (int i=0; i<hnlen; i++) {
-                    if (!( (hnaddr[i] >= '1' && hnaddr[i] <= '9') ||
+                    if (!( (hnaddr[i] >= '0' && hnaddr[i] <= '9') ||
                          (hnaddr[i] >= 'a' && hnaddr[i] <= 'z') ||
                          hnaddr[i] == '.' || hnaddr[i] == '-'))
                     {