# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1625275677 -7200
# Node ID aa119de5f6c72a066f6ccb541f21352c38c9cd15
# Parent  35e880501efdedd4758061f1707f585b083352c2
util.ip: Fix netmask for link-local address range

This may have mistakenly caused link-local addresses to be considered
global.  May have caused mod_s2s and prosodyctl check dns to behave
incorrectly on networks using link-local IPv4 addresses. By my
guesstimate, these are extremely rare.  Probably minimal impact beyond
a bit longer to establish s2s and some possible confusion from
prosodyctl check dns results.

Ref RFC 3927

diff -r 35e880501efd -r aa119de5f6c7 util/ip.lua
--- a/util/ip.lua	Thu May 27 12:35:55 2021 +0200
+++ b/util/ip.lua	Sat Jul 03 03:27:57 2021 +0200
@@ -100,7 +100,7 @@
 local function v4scope(ip)
 	if match(ip, loopback4, 8) then
 		return 0x2;
-	elseif match(ip, linklocal4) then
+	elseif match(ip, linklocal4, 16) then
 		return 0x2;
 	else -- Global unicast
 		return 0xE;