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net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s

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This commit is contained in:
Kim Alvefur 2015-04-24 14:14:01 +02:00
parent 51bef3673c
commit 7dff400ed5
2 changed files with 8 additions and 15 deletions
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11
net/dns.lua
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@ -694,15 +694,20 @@ local function comp_mx(a, b) -- - - - - - - - - - - - - - - - - - - comp_mx
end
function resolver:peek (qname, qtype, qclass) -- - - - - - - - - - - - peek
function resolver:peek (qname, qtype, qclass, n) -- - - - - - - - - - - - peek
qname, qtype, qclass = standardize(qname, qtype, qclass);
local rrs = get(self.cache, qclass, qtype, qname);
if not rrs then return nil; end
if not rrs then
if n then if n <= 0 then return end else n = 3 end
rrs = get(self.cache, qclass, "CNAME", qname);
if not (rrs and rrs[1]) then return end
return self:peek(rrs[1].cname, qtype, qclass, n - 1);
end
if prune(rrs, socket.gettime()) and qtype == '*' or not next(rrs) then
set(self.cache, qclass, qtype, qname, nil);
return nil;
end
if self.unsorted[rrs] then table.sort (rrs, comp_mx); end
if self.unsorted[rrs] then table.sort (rrs, comp_mx); self.unsorted[rrs] = nil; end
return rrs;
end