Feature #3835 » resolv-1.9.2-tcp-fallback.diff
| resolv-1.9.2.rb 2010-09-15 20:42:19.035523123 +0000 | ||
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def each_resource(name, typeclass, &proc)
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lazy_initialize
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requester = make_requester
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requester = make_udp_requester
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senders = {}
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begin
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@config.resolv(name) {|candidate, tout, nameserver, port|
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| ... | ... | |
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reply, reply_name = requester.request(sender, tout)
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case reply.rcode
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when RCode::NoError
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extract_resources(reply, reply_name, typeclass, &proc)
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if reply.tc and not Requester::TCP === requester
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# Retry via TCP:
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requester = make_tcp_requester
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senders = {}
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# This will use TCP for all remaining candidates (assuming the
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# current candidate does not already respond successfully via
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# TCP). This makes sense because we already know the full
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# response will not fit in an untruncated UDP packet.
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redo
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else
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extract_resources(reply, reply_name, typeclass, &proc)
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end
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return
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when RCode::NXDomain
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raise Config::NXDomain.new(reply_name.to_s)
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| ... | ... | |
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end
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end
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def make_requester # :nodoc:
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def make_udp_requester # :nodoc:
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nameserver_port = @config.nameserver_port
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if nameserver_port.length == 1
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Requester::ConnectedUDP.new(*nameserver_port[0])
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| ... | ... | |
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end
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end
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def make_tcp_requester # :nodoc:
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nameserver_port = @config.nameserver_port
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return Requester::TCP.new(*nameserver_port[0])
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end
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def extract_resources(msg, name, typeclass) # :nodoc:
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if typeclass < Resource::ANY
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n0 = Name.create(name)
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