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util.ip: Fix netmask for link-local address range

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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
This commit is contained in:
Kim Alvefur 2021-07-03 03:27:57 +02:00
parent 13c5a2359d
commit 59d820880f
1 changed files with 1 additions and 1 deletions
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2
util/ip.lua
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@ -100,7 +100,7 @@ local ipv6mapped = new_ip("::ffff:0:0");
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;