From b9e34ee7304541b19b8027ce40ec32b7c82b6aa7 Mon Sep 17 00:00:00 2001
From: Valentin Gosu <valentin.gosu@gmail.com>
Date: Tue, 15 Oct 2024 15:25:15 +0000
Subject: [PATCH] Bug 1924631 - Fix Win MinGW build r=necko-reviewers,kershaw

Defines IN6_IS_ADDR_LINKLOCAL and IN6_IS_ADDR_LOOPBACK when the symbols
aren't known.

Differential Revision: https://phabricator.services.mozilla.com/D225630
---
 netwerk/system/win32/nsNotifyAddrListener.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/netwerk/system/win32/nsNotifyAddrListener.cpp b/netwerk/system/win32/nsNotifyAddrListener.cpp
index f098a65b1d59..2dc42c3d6a36 100644
--- a/netwerk/system/win32/nsNotifyAddrListener.cpp
+++ b/netwerk/system/win32/nsNotifyAddrListener.cpp
@@ -48,6 +48,21 @@
 #include <iptypes.h>
 #include <iphlpapi.h>
 
+#ifndef IN6_IS_ADDR_LOOPBACK
+int IN6_IS_ADDR_LOOPBACK(const struct in6_addr* a) {
+  auto words = a->s6_words;
+  return (words[0] == 0) && (words[1] == 0) && (words[2] == 0) &&
+         (words[3] == 0) && (words[4] == 0) && (words[5] == 0) &&
+         (words[6] == 0) && (words[7] == 0x0100);
+}
+#endif
+
+#ifndef IN6_IS_ADDR_LINKLOCAL
+#  define IN6_IS_ADDR_LINKLOCAL(_addr)         \
+    ((((const uint8_t*)(_addr))[0] == 0xfe) && \
+     ((((const uint8_t*)(_addr))[1] & 0xc0) == 0x80))
+#endif
+
 using namespace mozilla;
 
 static LazyLogModule gNotifyAddrLog("nsNotifyAddr");