From 10aed80b29d9e22f08f22398f33f9723aa999607 Mon Sep 17 00:00:00 2001
From: Peter Brottveit Bock <post@peterbb.net>
Date: Tue, 30 May 2023 00:25:28 +0200
Subject: [PATCH] AK: Define IPv6Address::loopback(), the IPv6 loopback address
 '::1'

---
 AK/IPv6Address.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/AK/IPv6Address.h b/AK/IPv6Address.h
index e2e59dd6f94..34bcb646e6b 100644
--- a/AK/IPv6Address.h
+++ b/AK/IPv6Address.h
@@ -251,6 +251,12 @@ public:
         return {};
     }
 
+    // https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.3
+    [[nodiscard]] static IPv6Address loopback()
+    {
+        return IPv6Address({ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 });
+    }
+
 private:
     constexpr u16 group(unsigned i) const
     {