diff options
Diffstat (limited to 'lib/resolv.rb')
| -rw-r--r-- | lib/resolv.rb | 92 |
1 files changed, 59 insertions, 33 deletions
diff --git a/lib/resolv.rb b/lib/resolv.rb index b9bb536c2e..ffced98052 100644 --- a/lib/resolv.rb +++ b/lib/resolv.rb @@ -520,10 +520,11 @@ class Resolv end def make_requester # :nodoc: - if nameserver_port = @config.single? - Requester::ConnectedUDP.new(*nameserver_port) + nameserver_port = @config.nameserver_port + if nameserver_port.length == 1 + Requester::ConnectedUDP.new(*nameserver_port[0]) else - Requester::UnconnectedUDP.new + Requester::UnconnectedUDP.new(*nameserver_port) end end @@ -609,10 +610,10 @@ class Resolv } end - def self.bind_random_port(udpsock, is_ipv6=false) # :nodoc: + def self.bind_random_port(udpsock, bind_host="0.0.0.0") # :nodoc: begin port = rangerand(1024..65535) - udpsock.bind(is_ipv6 ? "::" : "", port) + udpsock.bind(bind_host, port) rescue Errno::EADDRINUSE retry end @@ -621,7 +622,7 @@ class Resolv class Requester # :nodoc: def initialize @senders = {} - @sock = nil + @socks = nil end def request(sender, tout) @@ -629,10 +630,11 @@ class Resolv sender.send while (now = Time.now) < timelimit timeout = timelimit - now - if !IO.select([@sock], nil, nil, timeout) + select_result = IO.select(@socks, nil, nil, timeout) + if !select_result raise ResolvTimeout end - reply, from = recv_reply + reply, from = recv_reply(select_result[0]) begin msg = Message.decode(reply) rescue DecodeError @@ -648,9 +650,11 @@ class Resolv end def close - sock = @sock - @sock = nil - sock.close if sock + socks = @socks + @socks = nil + if socks + socks.each {|sock| sock.close } + end end class Sender # :nodoc: @@ -662,16 +666,31 @@ class Resolv end class UnconnectedUDP < Requester # :nodoc: - def initialize + def initialize(*nameserver_port) super() - @sock = UDPSocket.new - @sock.do_not_reverse_lookup = true - @sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD - DNS.bind_random_port(@sock) + @nameserver_port = nameserver_port + @socks_hash = {} + @socks = [] + nameserver_port.each {|host, port| + if host.index(':') + bind_host = "::" + af = Socket::AF_INET6 + else + bind_host = "0.0.0.0" + af = Socket::AF_INET + end + next if @socks_hash[bind_host] + sock = UDPSocket.new(af) + sock.do_not_reverse_lookup = true + sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD + DNS.bind_random_port(sock, bind_host) + @socks << sock + @socks_hash[bind_host] = sock + } end - def recv_reply - reply, from = @sock.recvfrom(UDPSize) + def recv_reply(readable_socks) + reply, from = readable_socks[0].recvfrom(UDPSize) return reply, [from[3],from[1]] end @@ -680,8 +699,9 @@ class Resolv id = DNS.allocate_request_id(host, port) request = msg.encode request[0,2] = [id].pack('n') + sock = @socks_hash[host.index(':') ? "::" : "0.0.0.0"] return @senders[[service, id]] = - Sender.new(request, data, @sock, host, port) + Sender.new(request, data, sock, host, port) end def close @@ -711,15 +731,16 @@ class Resolv @host = host @port = port is_ipv6 = host.index(':') - @sock = UDPSocket.new(is_ipv6 ? Socket::AF_INET6 : Socket::AF_INET) - @sock.do_not_reverse_lookup = true - @sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD - DNS.bind_random_port(@sock, is_ipv6) - @sock.connect(host, port) + sock = UDPSocket.new(is_ipv6 ? Socket::AF_INET6 : Socket::AF_INET) + @socks = [sock] + sock.do_not_reverse_lookup = true + sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD + DNS.bind_random_port(sock, is_ipv6 ? "::" : "0.0.0.0") + sock.connect(host, port) end - def recv_reply - reply = @sock.recv(UDPSize) + def recv_reply(readable_socks) + reply = readable_socks[0].recv(UDPSize) return reply, nil end @@ -730,7 +751,7 @@ class Resolv id = DNS.allocate_request_id(@host, @port) request = msg.encode request[0,2] = [id].pack('n') - return @senders[[nil,id]] = Sender.new(request, data, @sock) + return @senders[[nil,id]] = Sender.new(request, data, @socks[0]) end def close @@ -753,14 +774,15 @@ class Resolv super() @host = host @port = port - @sock = TCPSocket.new(@host, @port) - @sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD + sock = TCPSocket.new(@host, @port) + @socks = [sock] + sock.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC) if defined? Fcntl::F_SETFD @senders = {} end - def recv_reply - len = @sock.read(2).unpack('n')[0] - reply = @sock.read(len) + def recv_reply(readable_socks) + len = readable_socks[0].read(2).unpack('n')[0] + reply = @socks[0].read(len) return reply, nil end @@ -771,7 +793,7 @@ class Resolv id = DNS.allocate_request_id(@host, @port) request = msg.encode request[0,2] = [request.length, id].pack('nn') - return @senders[[nil,id]] = Sender.new(request, data, @sock) + return @senders[[nil,id]] = Sender.new(request, data, @socks[0]) end class Sender < Requester::Sender # :nodoc: @@ -932,6 +954,10 @@ class Resolv end end + def nameserver_port + @nameserver_port + end + def generate_candidates(name) candidates = nil name = Name.create(name) |