From 7f1c098728529b206e9118dcbccfd2611f8a70e4 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 7 May 2020 12:24:27 +0200
Subject: urlapi: accept :: as a valid IPv6 address

Text 1560 is extended to verify.

Reported-by: Pavel Volgarev
Fixes #5344
Closes #5351
---
 lib/urlapi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/urlapi.c b/lib/urlapi.c
index 506e244dc..37937fbca 100644
--- a/lib/urlapi.c
+++ b/lib/urlapi.c
@@ -606,7 +606,7 @@ static CURLUcode hostname_check(struct Curl_URL *u, char *hostname)
     char dest[16]; /* fits a binary IPv6 address */
 #endif
     const char *l = "0123456789abcdefABCDEF:.";
-    if(hlen < 5) /* '[::1]' is the shortest possible valid string */
+    if(hlen < 4) /* '[::]' is the shortest possible valid string */
       return CURLUE_MALFORMED_INPUT;
     hostname++;
     hlen -= 2;
-- 
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