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net.dns: Avoid duplicate cache entries

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This commit is contained in:
Florian Zeitz 2014-10-05 14:28:40 +02:00
parent 74cbb01e3a
commit 2b53ced362
1 changed files with 9 additions and 4 deletions
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13
net/dns.lua
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@ -134,17 +134,19 @@ end
local function prune(rrs, time, soft) -- - - - - - - - - - - - - - - prune
time = time or socket.gettime();
for i,rr in pairs(rrs) do
for i,rr in ipairs(rrs) do
if rr.tod then
-- rr.tod = rr.tod - 50 -- accelerated decripitude
rr.ttl = math.floor(rr.tod - time);
if rr.ttl <= 0 then
rrs[rr[rr.type:lower()]] = nil;
table.remove(rrs, i);
return prune(rrs, time, soft); -- Re-iterate
end
elseif soft == 'soft' then -- What is this? I forget!
assert(rr.ttl == 0);
rrs[i] = nil;
rrs[rr[rr.type:lower()]] = nil;
table.remove(rrs, i);
end
end
end
@ -187,7 +189,7 @@ end
local rrs_metatable = {}; -- - - - - - - - - - - - - - - - - - rrs_metatable
function rrs_metatable.__tostring(rrs)
local t = {};
for i,rr in pairs(rrs) do
for i,rr in ipairs(rrs) do
append(t, tostring(rr)..'\n');
end
return table.concat(t);
@ -674,7 +676,10 @@ function resolver:remember(rr, type) -- - - - - - - - - - - - - - remember
self.cache = self.cache or setmetatable({}, cache_metatable);
local rrs = get(self.cache, qclass, type, qname) or
set(self.cache, qclass, type, qname, setmetatable({}, rrs_metatable));
append(rrs, rr);
if not rrs[rr[qtype:lower()]] then
rrs[rr[qtype:lower()]] = true;
append(rrs, rr);
end
if type == 'MX' then self.unsorted[rrs] = true; end
end