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diff --git a/jni/ruby/lib/net/telnet.rb b/jni/ruby/lib/net/telnet.rb
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+# = net/telnet.rb - Simple Telnet Client Library
+#
+# Author:: Wakou Aoyama <wakou@ruby-lang.org>
+# Documentation:: William Webber and Wakou Aoyama
+#
+# This file holds the class Net::Telnet, which provides client-side
+# telnet functionality.
+#
+# For documentation, see Net::Telnet.
+#
+
+require "net/protocol"
+require "English"
+
+module Net
+
+  #
+  # == Net::Telnet
+  #
+  # Provides telnet client functionality.
+  #
+  # This class also has, through delegation, all the methods of a
+  # socket object (by default, a +TCPSocket+, but can be set by the
+  # +Proxy+ option to <tt>new()</tt>).  This provides methods such as
+  # <tt>close()</tt> to end the session and <tt>sysread()</tt> to read
+  # data directly from the host, instead of via the <tt>waitfor()</tt>
+  # mechanism.  Note that if you do use <tt>sysread()</tt> directly
+  # when in telnet mode, you should probably pass the output through
+  # <tt>preprocess()</tt> to extract telnet command sequences.
+  #
+  # == Overview
+  #
+  # The telnet protocol allows a client to login remotely to a user
+  # account on a server and execute commands via a shell.  The equivalent
+  # is done by creating a Net::Telnet class with the +Host+ option
+  # set to your host, calling #login() with your user and password,
+  # issuing one or more #cmd() calls, and then calling #close()
+  # to end the session.  The #waitfor(), #print(), #puts(), and
+  # #write() methods, which #cmd() is implemented on top of, are
+  # only needed if you are doing something more complicated.
+  #
+  # A Net::Telnet object can also be used to connect to non-telnet
+  # services, such as SMTP or HTTP.  In this case, you normally
+  # want to provide the +Port+ option to specify the port to
+  # connect to, and set the +Telnetmode+ option to false to prevent
+  # the client from attempting to interpret telnet command sequences.
+  # Generally, #login() will not work with other protocols, and you
+  # have to handle authentication yourself.
+  #
+  # For some protocols, it will be possible to specify the +Prompt+
+  # option once when you create the Telnet object and use #cmd() calls;
+  # for others, you will have to specify the response sequence to
+  # look for as the Match option to every #cmd() call, or call
+  # #puts() and #waitfor() directly; for yet others, you will have
+  # to use #sysread() instead of #waitfor() and parse server
+  # responses yourself.
+  #
+  # It is worth noting that when you create a new Net::Telnet object,
+  # you can supply a proxy IO channel via the Proxy option.  This
+  # can be used to attach the Telnet object to other Telnet objects,
+  # to already open sockets, or to any read-write IO object.  This
+  # can be useful, for instance, for setting up a test fixture for
+  # unit testing.
+  #
+  # == Examples
+  #
+  # === Log in and send a command, echoing all output to stdout
+  #
+  #   localhost = Net::Telnet::new("Host" => "localhost",
+  #                                "Timeout" => 10,
+  #                                "Prompt" => /[$%#>] \z/n)
+  #   localhost.login("username", "password") { |c| print c }
+  #   localhost.cmd("command") { |c| print c }
+  #   localhost.close
+  #
+  #
+  # === Check a POP server to see if you have mail
+  #
+  #   pop = Net::Telnet::new("Host" => "your_destination_host_here",
+  #                          "Port" => 110,
+  #                          "Telnetmode" => false,
+  #                          "Prompt" => /^\+OK/n)
+  #   pop.cmd("user " + "your_username_here") { |c| print c }
+  #   pop.cmd("pass " + "your_password_here") { |c| print c }
+  #   pop.cmd("list") { |c| print c }
+  #
+  # == References
+  #
+  # There are a large number of RFCs relevant to the Telnet protocol.
+  # RFCs 854-861 define the base protocol.  For a complete listing
+  # of relevant RFCs, see
+  # http://www.omnifarious.org/~hopper/technical/telnet-rfc.html
+  #
+  class Telnet
+
+    # :stopdoc:
+    IAC   = 255.chr # "\377" # "\xff" # interpret as command
+    DONT  = 254.chr # "\376" # "\xfe" # you are not to use option
+    DO    = 253.chr # "\375" # "\xfd" # please, you use option
+    WONT  = 252.chr # "\374" # "\xfc" # I won't use option
+    WILL  = 251.chr # "\373" # "\xfb" # I will use option
+    SB    = 250.chr # "\372" # "\xfa" # interpret as subnegotiation
+    GA    = 249.chr # "\371" # "\xf9" # you may reverse the line
+    EL    = 248.chr # "\370" # "\xf8" # erase the current line
+    EC    = 247.chr # "\367" # "\xf7" # erase the current character
+    AYT   = 246.chr # "\366" # "\xf6" # are you there
+    AO    = 245.chr # "\365" # "\xf5" # abort output--but let prog finish
+    IP    = 244.chr # "\364" # "\xf4" # interrupt process--permanently
+    BREAK = 243.chr # "\363" # "\xf3" # break
+    DM    = 242.chr # "\362" # "\xf2" # data mark--for connect. cleaning
+    NOP   = 241.chr # "\361" # "\xf1" # nop
+    SE    = 240.chr # "\360" # "\xf0" # end sub negotiation
+    EOR   = 239.chr # "\357" # "\xef" # end of record (transparent mode)
+    ABORT = 238.chr # "\356" # "\xee" # Abort process
+    SUSP  = 237.chr # "\355" # "\xed" # Suspend process
+    EOF   = 236.chr # "\354" # "\xec" # End of file
+    SYNCH = 242.chr # "\362" # "\xf2" # for telfunc calls
+
+    OPT_BINARY         =   0.chr # "\000" # "\x00" # Binary Transmission
+    OPT_ECHO           =   1.chr # "\001" # "\x01" # Echo
+    OPT_RCP            =   2.chr # "\002" # "\x02" # Reconnection
+    OPT_SGA            =   3.chr # "\003" # "\x03" # Suppress Go Ahead
+    OPT_NAMS           =   4.chr # "\004" # "\x04" # Approx Message Size Negotiation
+    OPT_STATUS         =   5.chr # "\005" # "\x05" # Status
+    OPT_TM             =   6.chr # "\006" # "\x06" # Timing Mark
+    OPT_RCTE           =   7.chr # "\a"   # "\x07" # Remote Controlled Trans and Echo
+    OPT_NAOL           =   8.chr # "\010" # "\x08" # Output Line Width
+    OPT_NAOP           =   9.chr # "\t"   # "\x09" # Output Page Size
+    OPT_NAOCRD         =  10.chr # "\n"   # "\x0a" # Output Carriage-Return Disposition
+    OPT_NAOHTS         =  11.chr # "\v"   # "\x0b" # Output Horizontal Tab Stops
+    OPT_NAOHTD         =  12.chr # "\f"   # "\x0c" # Output Horizontal Tab Disposition
+    OPT_NAOFFD         =  13.chr # "\r"   # "\x0d" # Output Formfeed Disposition
+    OPT_NAOVTS         =  14.chr # "\016" # "\x0e" # Output Vertical Tabstops
+    OPT_NAOVTD         =  15.chr # "\017" # "\x0f" # Output Vertical Tab Disposition
+    OPT_NAOLFD         =  16.chr # "\020" # "\x10" # Output Linefeed Disposition
+    OPT_XASCII         =  17.chr # "\021" # "\x11" # Extended ASCII
+    OPT_LOGOUT         =  18.chr # "\022" # "\x12" # Logout
+    OPT_BM             =  19.chr # "\023" # "\x13" # Byte Macro
+    OPT_DET            =  20.chr # "\024" # "\x14" # Data Entry Terminal
+    OPT_SUPDUP         =  21.chr # "\025" # "\x15" # SUPDUP
+    OPT_SUPDUPOUTPUT   =  22.chr # "\026" # "\x16" # SUPDUP Output
+    OPT_SNDLOC         =  23.chr # "\027" # "\x17" # Send Location
+    OPT_TTYPE          =  24.chr # "\030" # "\x18" # Terminal Type
+    OPT_EOR            =  25.chr # "\031" # "\x19" # End of Record
+    OPT_TUID           =  26.chr # "\032" # "\x1a" # TACACS User Identification
+    OPT_OUTMRK         =  27.chr # "\e"   # "\x1b" # Output Marking
+    OPT_TTYLOC         =  28.chr # "\034" # "\x1c" # Terminal Location Number
+    OPT_3270REGIME     =  29.chr # "\035" # "\x1d" # Telnet 3270 Regime
+    OPT_X3PAD          =  30.chr # "\036" # "\x1e" # X.3 PAD
+    OPT_NAWS           =  31.chr # "\037" # "\x1f" # Negotiate About Window Size
+    OPT_TSPEED         =  32.chr # " "    # "\x20" # Terminal Speed
+    OPT_LFLOW          =  33.chr # "!"    # "\x21" # Remote Flow Control
+    OPT_LINEMODE       =  34.chr # "\""   # "\x22" # Linemode
+    OPT_XDISPLOC       =  35.chr # "#"    # "\x23" # X Display Location
+    OPT_OLD_ENVIRON    =  36.chr # "$"    # "\x24" # Environment Option
+    OPT_AUTHENTICATION =  37.chr # "%"    # "\x25" # Authentication Option
+    OPT_ENCRYPT        =  38.chr # "&"    # "\x26" # Encryption Option
+    OPT_NEW_ENVIRON    =  39.chr # "'"    # "\x27" # New Environment Option
+    OPT_EXOPL          = 255.chr # "\377" # "\xff" # Extended-Options-List
+
+    NULL = "\000"
+    CR   = "\015"
+    LF   = "\012"
+    EOL  = CR + LF
+    REVISION = '$Id: telnet.rb 47298 2014-08-27 12:10:21Z hsbt $'
+    # :startdoc:
+
+    #
+    # Creates a new Net::Telnet object.
+    #
+    # Attempts to connect to the host (unless the Proxy option is
+    # provided: see below).  If a block is provided, it is yielded
+    # status messages on the attempt to connect to the server, of
+    # the form:
+    #
+    #   Trying localhost...
+    #   Connected to localhost.
+    #
+    # +options+ is a hash of options.  The following example lists
+    # all options and their default values.
+    #
+    #   host = Net::Telnet::new(
+    #            "Host"       => "localhost",  # default: "localhost"
+    #            "Port"       => 23,           # default: 23
+    #            "Binmode"    => false,        # default: false
+    #            "Output_log" => "output_log", # default: nil (no output)
+    #            "Dump_log"   => "dump_log",   # default: nil (no output)
+    #            "Prompt"     => /[$%#>] \z/n, # default: /[$%#>] \z/n
+    #            "Telnetmode" => true,         # default: true
+    #            "Timeout"    => 10,           # default: 10
+    #              # if ignore timeout then set "Timeout" to false.
+    #            "Waittime"   => 0,            # default: 0
+    #            "Proxy"      => proxy         # default: nil
+    #                            # proxy is Net::Telnet or IO object
+    #          )
+    #
+    # The options have the following meanings:
+    #
+    # Host:: the hostname or IP address of the host to connect to, as a String.
+    #        Defaults to "localhost".
+    #
+    # Port:: the port to connect to.  Defaults to 23.
+    #
+    # Binmode:: if false (the default), newline substitution is performed.
+    #           Outgoing LF is
+    #           converted to CRLF, and incoming CRLF is converted to LF.  If
+    #           true, this substitution is not performed.  This value can
+    #           also be set with the #binmode() method.  The
+    #           outgoing conversion only applies to the #puts() and #print()
+    #           methods, not the #write() method.  The precise nature of
+    #           the newline conversion is also affected by the telnet options
+    #           SGA and BIN.
+    #
+    # Output_log:: the name of the file to write connection status messages
+    #              and all received traffic to.  In the case of a proper
+    #              Telnet session, this will include the client input as
+    #              echoed by the host; otherwise, it only includes server
+    #              responses.  Output is appended verbatim to this file.
+    #              By default, no output log is kept.
+    #
+    # Dump_log:: as for Output_log, except that output is written in hexdump
+    #            format (16 bytes per line as hex pairs, followed by their
+    #            printable equivalent), with connection status messages
+    #            preceded by '#', sent traffic preceded by '>', and
+    #            received traffic preceded by '<'.  By default, not dump log
+    #            is kept.
+    #
+    # Prompt:: a regular expression matching the host's command-line prompt
+    #          sequence.  This is needed by the Telnet class to determine
+    #          when the output from a command has finished and the host is
+    #          ready to receive a new command.  By default, this regular
+    #          expression is /[$%#>] \z/n.
+    #
+    # Telnetmode:: a boolean value, true by default.  In telnet mode,
+    #              traffic received from the host is parsed for special
+    #              command sequences, and these sequences are escaped
+    #              in outgoing traffic sent using #puts() or #print()
+    #              (but not #write()).  If you are using the Net::Telnet
+    #              object to connect to a non-telnet service (such as
+    #              SMTP or POP), this should be set to "false" to prevent
+    #              undesired data corruption.  This value can also be set
+    #              by the #telnetmode() method.
+    #
+    # Timeout:: the number of seconds to wait before timing out both the
+    #           initial attempt to connect to host (in this constructor),
+    #           which raises a Net::OpenTimeout, and all attempts to read data
+    #           from the host, which raises a Net::ReadTimeout (in #waitfor(),
+    #           #cmd(), and #login()).  The default value is 10 seconds.
+    #           You can disable the timeout by setting this value to false.
+    #           In this case, the connect attempt will eventually timeout
+    #           on the underlying connect(2) socket call with an
+    #           Errno::ETIMEDOUT error (but generally only after a few
+    #           minutes), but other attempts to read data from the host
+    #           will hang indefinitely if no data is forthcoming.
+    #
+    # Waittime:: the amount of time to wait after seeing what looks like a
+    #            prompt (that is, received data that matches the Prompt
+    #            option regular expression) to see if more data arrives.
+    #            If more data does arrive in this time, Net::Telnet assumes
+    #            that what it saw was not really a prompt.  This is to try to
+    #            avoid false matches, but it can also lead to missing real
+    #            prompts (if, for instance, a background process writes to
+    #            the terminal soon after the prompt is displayed).  By
+    #            default, set to 0, meaning not to wait for more data.
+    #
+    # Proxy:: a proxy object to used instead of opening a direct connection
+    #         to the host.  Must be either another Net::Telnet object or
+    #         an IO object.  If it is another Net::Telnet object, this
+    #         instance will use that one's socket for communication.  If an
+    #         IO object, it is used directly for communication.  Any other
+    #         kind of object will cause an error to be raised.
+    #
+    def initialize(options) # :yield: mesg
+      @options = options
+      @options["Host"]       = "localhost"   unless @options.has_key?("Host")
+      @options["Port"]       = 23            unless @options.has_key?("Port")
+      @options["Prompt"]     = /[$%#>] \z/n  unless @options.has_key?("Prompt")
+      @options["Timeout"]    = 10            unless @options.has_key?("Timeout")
+      @options["Waittime"]   = 0             unless @options.has_key?("Waittime")
+      unless @options.has_key?("Binmode")
+        @options["Binmode"]    = false
+      else
+        unless (true == @options["Binmode"] or false == @options["Binmode"])
+          raise ArgumentError, "Binmode option must be true or false"
+        end
+      end
+
+      unless @options.has_key?("Telnetmode")
+        @options["Telnetmode"] = true
+      else
+        unless (true == @options["Telnetmode"] or false == @options["Telnetmode"])
+          raise ArgumentError, "Telnetmode option must be true or false"
+        end
+      end
+
+      @telnet_option = { "SGA" => false, "BINARY" => false }
+
+      if @options.has_key?("Output_log")
+        @log = File.open(@options["Output_log"], 'a+')
+        @log.sync = true
+        @log.binmode
+      end
+
+      if @options.has_key?("Dump_log")
+        @dumplog = File.open(@options["Dump_log"], 'a+')
+        @dumplog.sync = true
+        @dumplog.binmode
+        def @dumplog.log_dump(dir, x)  # :nodoc:
+          len = x.length
+          addr = 0
+          offset = 0
+          while 0 < len
+            if len < 16
+              line = x[offset, len]
+            else
+              line = x[offset, 16]
+            end
+            hexvals = line.unpack('H*')[0]
+            hexvals += ' ' * (32 - hexvals.length)
+            hexvals = format("%s %s %s %s  " * 4, *hexvals.unpack('a2' * 16))
+            line = line.gsub(/[\000-\037\177-\377]/n, '.')
+            printf "%s 0x%5.5x: %s%s\n", dir, addr, hexvals, line
+            addr += 16
+            offset += 16
+            len -= 16
+          end
+          print "\n"
+        end
+      end
+
+      if @options.has_key?("Proxy")
+        if @options["Proxy"].kind_of?(Net::Telnet)
+          @sock = @options["Proxy"].sock
+        elsif @options["Proxy"].kind_of?(IO)
+          @sock = @options["Proxy"]
+        else
+          raise "Error: Proxy must be an instance of Net::Telnet or IO."
+        end
+      else
+        message = "Trying " + @options["Host"] + "...\n"
+        yield(message) if block_given?
+        @log.write(message) if @options.has_key?("Output_log")
+        @dumplog.log_dump('#', message) if @options.has_key?("Dump_log")
+
+        begin
+          if @options["Timeout"] == false
+            @sock = TCPSocket.open(@options["Host"], @options["Port"])
+          else
+            Timeout.timeout(@options["Timeout"], Net::OpenTimeout) do
+              @sock = TCPSocket.open(@options["Host"], @options["Port"])
+            end
+          end
+        rescue Net::OpenTimeout
+          raise Net::OpenTimeout, "timed out while opening a connection to the host"
+        rescue
+          @log.write($ERROR_INFO.to_s + "\n") if @options.has_key?("Output_log")
+          @dumplog.log_dump('#', $ERROR_INFO.to_s + "\n") if @options.has_key?("Dump_log")
+          raise
+        end
+        @sock.sync = true
+        @sock.binmode
+
+        message = "Connected to " + @options["Host"] + ".\n"
+        yield(message) if block_given?
+        @log.write(message) if @options.has_key?("Output_log")
+        @dumplog.log_dump('#', message) if @options.has_key?("Dump_log")
+      end
+
+    end # initialize
+
+    # The socket the Telnet object is using.  Note that this object becomes
+    # a delegate of the Telnet object, so normally you invoke its methods
+    # directly on the Telnet object.
+    attr_reader :sock
+
+    # Set telnet command interpretation on (+mode+ == true) or off
+    # (+mode+ == false), or return the current value (+mode+ not
+    # provided).  It should be on for true telnet sessions, off if
+    # using Net::Telnet to connect to a non-telnet service such
+    # as SMTP.
+    def telnetmode(mode = nil)
+      case mode
+      when nil
+        @options["Telnetmode"]
+      when true, false
+        @options["Telnetmode"] = mode
+      else
+        raise ArgumentError, "argument must be true or false, or missing"
+      end
+    end
+
+    # Turn telnet command interpretation on (true) or off (false).  It
+    # should be on for true telnet sessions, off if using Net::Telnet
+    # to connect to a non-telnet service such as SMTP.
+    def telnetmode=(mode)
+      if (true == mode or false == mode)
+        @options["Telnetmode"] = mode
+      else
+        raise ArgumentError, "argument must be true or false"
+      end
+    end
+
+    # Turn newline conversion on (+mode+ == false) or off (+mode+ == true),
+    # or return the current value (+mode+ is not specified).
+    def binmode(mode = nil)
+      case mode
+      when nil
+        @options["Binmode"]
+      when true, false
+        @options["Binmode"] = mode
+      else
+        raise ArgumentError, "argument must be true or false"
+      end
+    end
+
+    # Turn newline conversion on (false) or off (true).
+    def binmode=(mode)
+      if (true == mode or false == mode)
+        @options["Binmode"] = mode
+      else
+        raise ArgumentError, "argument must be true or false"
+      end
+    end
+
+    # Preprocess received data from the host.
+    #
+    # Performs newline conversion and detects telnet command sequences.
+    # Called automatically by #waitfor().  You should only use this
+    # method yourself if you have read input directly using sysread()
+    # or similar, and even then only if in telnet mode.
+    def preprocess(string)
+      # combine CR+NULL into CR
+      string = string.gsub(/#{CR}#{NULL}/no, CR) if @options["Telnetmode"]
+
+      # combine EOL into "\n"
+      string = string.gsub(/#{EOL}/no, "\n") unless @options["Binmode"]
+
+      # remove NULL
+      string = string.gsub(/#{NULL}/no, '') unless @options["Binmode"]
+
+      string.gsub(/#{IAC}(
+                   [#{IAC}#{AO}#{AYT}#{DM}#{IP}#{NOP}]|
+                   [#{DO}#{DONT}#{WILL}#{WONT}]
+                     [#{OPT_BINARY}-#{OPT_NEW_ENVIRON}#{OPT_EXOPL}]|
+                   #{SB}[^#{IAC}]*#{IAC}#{SE}
+                 )/xno) do
+        if    IAC == $1  # handle escaped IAC characters
+          IAC
+        elsif AYT == $1  # respond to "IAC AYT" (are you there)
+          self.write("nobody here but us pigeons" + EOL)
+          ''
+        elsif DO[0] == $1[0]  # respond to "IAC DO x"
+          if OPT_BINARY[0] == $1[1]
+            @telnet_option["BINARY"] = true
+            self.write(IAC + WILL + OPT_BINARY)
+          else
+            self.write(IAC + WONT + $1[1..1])
+          end
+          ''
+        elsif DONT[0] == $1[0]  # respond to "IAC DON'T x" with "IAC WON'T x"
+          self.write(IAC + WONT + $1[1..1])
+          ''
+        elsif WILL[0] == $1[0]  # respond to "IAC WILL x"
+          if    OPT_BINARY[0] == $1[1]
+            self.write(IAC + DO + OPT_BINARY)
+          elsif OPT_ECHO[0] == $1[1]
+            self.write(IAC + DO + OPT_ECHO)
+          elsif OPT_SGA[0]  == $1[1]
+            @telnet_option["SGA"] = true
+            self.write(IAC + DO + OPT_SGA)
+          else
+            self.write(IAC + DONT + $1[1..1])
+          end
+          ''
+        elsif WONT[0] == $1[0]  # respond to "IAC WON'T x"
+          if    OPT_ECHO[0] == $1[1]
+            self.write(IAC + DONT + OPT_ECHO)
+          elsif OPT_SGA[0]  == $1[1]
+            @telnet_option["SGA"] = false
+            self.write(IAC + DONT + OPT_SGA)
+          else
+            self.write(IAC + DONT + $1[1..1])
+          end
+          ''
+        else
+          ''
+        end
+      end
+    end # preprocess
+
+    # Read data from the host until a certain sequence is matched.
+    #
+    # If a block is given, the received data will be yielded as it
+    # is read in (not necessarily all in one go), or nil if EOF
+    # occurs before any data is received.  Whether a block is given
+    # or not, all data read will be returned in a single string, or again
+    # nil if EOF occurs before any data is received.  Note that
+    # received data includes the matched sequence we were looking for.
+    #
+    # +options+ can be either a regular expression or a hash of options.
+    # If a regular expression, this specifies the data to wait for.
+    # If a hash, this can specify the following options:
+    #
+    # Match:: a regular expression, specifying the data to wait for.
+    # Prompt:: as for Match; used only if Match is not specified.
+    # String:: as for Match, except a string that will be converted
+    #          into a regular expression.  Used only if Match and
+    #          Prompt are not specified.
+    # Timeout:: the number of seconds to wait for data from the host
+    #           before raising a Timeout::Error.  If set to false,
+    #           no timeout will occur.  If not specified, the
+    #           Timeout option value specified when this instance
+    #           was created will be used, or, failing that, the
+    #           default value of 10 seconds.
+    # Waittime:: the number of seconds to wait after matching against
+    #            the input data to see if more data arrives.  If more
+    #            data arrives within this time, we will judge ourselves
+    #            not to have matched successfully, and will continue
+    #            trying to match.  If not specified, the Waittime option
+    #            value specified when this instance was created will be
+    #            used, or, failing that, the default value of 0 seconds,
+    #            which means not to wait for more input.
+    # FailEOF:: if true, when the remote end closes the connection then an
+    #           EOFError will be raised. Otherwise, defaults to the old
+    #           behaviour that the function will return whatever data
+    #           has been received already, or nil if nothing was received.
+    #
+    def waitfor(options) # :yield: recvdata
+      time_out = @options["Timeout"]
+      waittime = @options["Waittime"]
+      fail_eof = @options["FailEOF"]
+
+      if options.kind_of?(Hash)
+        prompt   = if options.has_key?("Match")
+                     options["Match"]
+                   elsif options.has_key?("Prompt")
+                     options["Prompt"]
+                   elsif options.has_key?("String")
+                     Regexp.new( Regexp.quote(options["String"]) )
+                   end
+        time_out = options["Timeout"]  if options.has_key?("Timeout")
+        waittime = options["Waittime"] if options.has_key?("Waittime")
+        fail_eof = options["FailEOF"]  if options.has_key?("FailEOF")
+      else
+        prompt = options
+      end
+
+      if time_out == false
+        time_out = nil
+      end
+
+      line = ''
+      buf = ''
+      rest = ''
+      until(prompt === line and not IO::select([@sock], nil, nil, waittime))
+        unless IO::select([@sock], nil, nil, time_out)
+          raise Net::ReadTimeout, "timed out while waiting for more data"
+        end
+        begin
+          c = @sock.readpartial(1024 * 1024)
+          @dumplog.log_dump('<', c) if @options.has_key?("Dump_log")
+          if @options["Telnetmode"]
+            c = rest + c
+            if Integer(c.rindex(/#{IAC}#{SE}/no) || 0) <
+               Integer(c.rindex(/#{IAC}#{SB}/no) || 0)
+              buf = preprocess(c[0 ... c.rindex(/#{IAC}#{SB}/no)])
+              rest = c[c.rindex(/#{IAC}#{SB}/no) .. -1]
+            elsif pt = c.rindex(/#{IAC}[^#{IAC}#{AO}#{AYT}#{DM}#{IP}#{NOP}]?\z/no) ||
+                       c.rindex(/\r\z/no)
+              buf = preprocess(c[0 ... pt])
+              rest = c[pt .. -1]
+            else
+              buf = preprocess(c)
+              rest = ''
+            end
+         else
+           # Not Telnetmode.
+           #
+           # We cannot use preprocess() on this data, because that
+           # method makes some Telnetmode-specific assumptions.
+           buf = rest + c
+           rest = ''
+           unless @options["Binmode"]
+             if pt = buf.rindex(/\r\z/no)
+               buf = buf[0 ... pt]
+               rest = buf[pt .. -1]
+             end
+             buf.gsub!(/#{EOL}/no, "\n")
+           end
+          end
+          @log.print(buf) if @options.has_key?("Output_log")
+          line += buf
+          yield buf if block_given?
+        rescue EOFError # End of file reached
+          raise if fail_eof
+          if line == ''
+            line = nil
+            yield nil if block_given?
+          end
+          break
+        end
+      end
+      line
+    end
+
+    # Write +string+ to the host.
+    #
+    # Does not perform any conversions on +string+.  Will log +string+ to the
+    # dumplog, if the Dump_log option is set.
+    def write(string)
+      length = string.length
+      while 0 < length
+        IO::select(nil, [@sock])
+        @dumplog.log_dump('>', string[-length..-1]) if @options.has_key?("Dump_log")
+        length -= @sock.syswrite(string[-length..-1])
+      end
+    end
+
+    # Sends a string to the host.
+    #
+    # This does _not_ automatically append a newline to the string.  Embedded
+    # newlines may be converted and telnet command sequences escaped
+    # depending upon the values of telnetmode, binmode, and telnet options
+    # set by the host.
+    def print(string)
+      string = string.gsub(/#{IAC}/no, IAC + IAC) if @options["Telnetmode"]
+
+      if @options["Binmode"]
+        self.write(string)
+      else
+        if @telnet_option["BINARY"] and @telnet_option["SGA"]
+          # IAC WILL SGA IAC DO BIN send EOL --> CR
+          self.write(string.gsub(/\n/n, CR))
+        elsif @telnet_option["SGA"]
+          # IAC WILL SGA send EOL --> CR+NULL
+          self.write(string.gsub(/\n/n, CR + NULL))
+        else
+          # NONE send EOL --> CR+LF
+          self.write(string.gsub(/\n/n, EOL))
+        end
+      end
+    end
+
+    # Sends a string to the host.
+    #
+    # Same as #print(), but appends a newline to the string.
+    def puts(string)
+      self.print(string + "\n")
+    end
+
+    # Send a command to the host.
+    #
+    # More exactly, sends a string to the host, and reads in all received
+    # data until is sees the prompt or other matched sequence.
+    #
+    # If a block is given, the received data will be yielded to it as
+    # it is read in.  Whether a block is given or not, the received data
+    # will be return as a string.  Note that the received data includes
+    # the prompt and in most cases the host's echo of our command.
+    #
+    # +options+ is either a String, specified the string or command to
+    # send to the host; or it is a hash of options.  If a hash, the
+    # following options can be specified:
+    #
+    # String:: the command or other string to send to the host.
+    # Match:: a regular expression, the sequence to look for in
+    #         the received data before returning.  If not specified,
+    #         the Prompt option value specified when this instance
+    #         was created will be used, or, failing that, the default
+    #         prompt of /[$%#>] \z/n.
+    # Timeout:: the seconds to wait for data from the host before raising
+    #           a Timeout error.  If not specified, the Timeout option
+    #           value specified when this instance was created will be
+    #           used, or, failing that, the default value of 10 seconds.
+    #
+    # The command or other string will have the newline sequence appended
+    # to it.
+    def cmd(options) # :yield: recvdata
+      match    = @options["Prompt"]
+      time_out = @options["Timeout"]
+      fail_eof = @options["FailEOF"]
+
+      if options.kind_of?(Hash)
+        string   = options["String"]
+        match    = options["Match"]   if options.has_key?("Match")
+        time_out = options["Timeout"] if options.has_key?("Timeout")
+        fail_eof = options["FailEOF"] if options.has_key?("FailEOF")
+      else
+        string = options
+      end
+
+      self.puts(string)
+      if block_given?
+        waitfor({"Prompt" => match, "Timeout" => time_out, "FailEOF" => fail_eof}){|c| yield c }
+      else
+        waitfor({"Prompt" => match, "Timeout" => time_out, "FailEOF" => fail_eof})
+      end
+    end
+
+    # Login to the host with a given username and password.
+    #
+    # The username and password can either be provided as two string
+    # arguments in that order, or as a hash with keys "Name" and
+    # "Password".
+    #
+    # This method looks for the strings "login" and "Password" from the
+    # host to determine when to send the username and password.  If the
+    # login sequence does not follow this pattern (for instance, you
+    # are connecting to a service other than telnet), you will need
+    # to handle login yourself.
+    #
+    # The password can be omitted, either by only
+    # provided one String argument, which will be used as the username,
+    # or by providing a has that has no "Password" key.  In this case,
+    # the method will not look for the "Password:" prompt; if it is
+    # sent, it will have to be dealt with by later calls.
+    #
+    # The method returns all data received during the login process from
+    # the host, including the echoed username but not the password (which
+    # the host should not echo).  If a block is passed in, this received
+    # data is also yielded to the block as it is received.
+    def login(options, password = nil) # :yield: recvdata
+      login_prompt = /[Ll]ogin[: ]*\z/n
+      password_prompt = /[Pp]ass(?:word|phrase)[: ]*\z/n
+      if options.kind_of?(Hash)
+        username = options["Name"]
+        password = options["Password"]
+        login_prompt = options["LoginPrompt"] if options["LoginPrompt"]
+        password_prompt = options["PasswordPrompt"] if options["PasswordPrompt"]
+      else
+        username = options
+      end
+
+      if block_given?
+        line = waitfor(login_prompt){|c| yield c }
+        if password
+          line += cmd({"String" => username,
+                       "Match" => password_prompt}){|c| yield c }
+          line += cmd(password){|c| yield c }
+        else
+          line += cmd(username){|c| yield c }
+        end
+      else
+        line = waitfor(login_prompt)
+        if password
+          line += cmd({"String" => username,
+                       "Match" => password_prompt})
+          line += cmd(password)
+        else
+          line += cmd(username)
+        end
+      end
+      line
+    end
+
+    # Closes the connection
+    def close
+      @sock.close
+    end
+
+  end  # class Telnet
+end  # module Net
+