diff options
| -rw-r--r-- | net/dns.lua | 11 | ||||
| -rw-r--r-- | plugins/mod_s2s/s2sout.lib.lua | 12 |
2 files changed, 8 insertions, 15 deletions
diff --git a/net/dns.lua b/net/dns.lua index 13417cee..28cb4419 100644 --- a/net/dns.lua +++ b/net/dns.lua @@ -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 diff --git a/plugins/mod_s2s/s2sout.lib.lua b/plugins/mod_s2s/s2sout.lib.lua index b24faf85..67b8fd0f 100644 --- a/plugins/mod_s2s/s2sout.lib.lua +++ b/plugins/mod_s2s/s2sout.lib.lua @@ -169,18 +169,6 @@ function s2sout.try_connect(host_session, connect_host, connect_port, err) handle4 = adns.lookup(function (reply, err) handle4 = nil; - -- COMPAT: This is a compromise for all you CNAME-(ab)users :) - if not (reply and reply[#reply] and reply[#reply].a) then - local count = max_dns_depth; - reply = dns.peek(connect_host, "CNAME", "IN"); - while count > 0 and reply and reply[#reply] and not reply[#reply].a and reply[#reply].cname do - log("debug", "Looking up %s (DNS depth is %d)", tostring(reply[#reply].cname), count); - reply = dns.peek(reply[#reply].cname, "A", "IN") or dns.peek(reply[#reply].cname, "CNAME", "IN"); - count = count - 1; - end - end - -- end of CNAME resolving - if reply and reply[#reply] and reply[#reply].a then for _, ip in ipairs(reply) do log("debug", "DNS reply for %s gives us %s", connect_host, ip.a); |