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util.dns: Fix returning read position after zero-length name

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Doesn't affect normal usage by Prosody since neither A nor AAAA records
use this and SRV records has the host name last so the position is not
needed.
This commit is contained in:
Kim Alvefur 2020-10-04 21:27:20 +02:00
parent c0be07a6b6
commit 29238183e9
1 changed files with 1 additions and 1 deletions
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2
util/dns.lua
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@ -40,7 +40,7 @@ local parsers = {};
-- No support for pointers, but libunbound appears to take care of that.
local function readDnsName(packet, pos)
if s_byte(packet, pos) == 0 then return "."; end
if s_byte(packet, pos) == 0 then return ".", pos+1; end
local pack_len, r, len = #packet, {};
pos = pos or 1;
repeat