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623
lib/net/telnet.rb
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@ -1,164 +1,71 @@
=begin
== NAME
net/telnet.rb - simple telnet client library
Wakou Aoyama <wakou@ruby-lang.org>
=== MAKE NEW TELNET OBJECT
host = Net::Telnet::new({
"Binmode" => false, # default: false
"Host" => "localhost", # default: "localhost"
"Output_log" => "output_log", # default: nil (no output)
"Dump_log" => "dump_log", # default: nil (no output)
"Port" => 23, # default: 23
"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
})
Telnet object has socket class methods.
if set "Telnetmode" option to false. not telnet command interpretation.
"Waittime" is time to confirm "Prompt". There is a possibility that
the same character as "Prompt" is included in the data, and, when
the network or the host is very heavy, the value is enlarged.
=== STATUS OUTPUT
host = Net::Telnet::new({"Host" => "localhost"}){|c| print c }
connection status output.
example:
Trying localhost...
Connected to localhost.
=== WAIT FOR MATCH
line = host.waitfor(/match/)
line = host.waitfor({"Match" => /match/,
"String" => "string",
"Timeout" => secs})
# if ignore timeout then set "Timeout" to false.
if set "String" option, then Match == Regexp.new(quote("string"))
==== REALTIME OUTPUT
host.waitfor(/match/){|c| print c }
host.waitfor({"Match" => /match/,
"String" => "string",
"Timeout" => secs}){|c| print c}
of cource, set sync=true or flush is necessary.
=== SEND STRING AND WAIT PROMPT
line = host.cmd("string")
line = host.cmd({"String" => "string",
"Match" => /[$%#>] \z/n,
"Timeout" => 10})
==== REALTIME OUTPUT
host.cmd("string"){|c| print c }
host.cmd({"String" => "string",
"Match" => /[$%#>] \z/n,
"Timeout" => 10}){|c| print c }
of cource, set sync=true or flush is necessary.
=== SEND STRING
host.print("string")
host.puts("string")
Telnet#puts() adds "\n" to the last of "string".
CAUTION: Telnet#print() NOT adds "\n" to the last of "string".
If "Telnetmode" option is true, then escape IAC code ("\xFF"). If
"Binmode" option is false, then convert "\n" to EOL(end of line) code.
If "WILL SGA" and "DO BIN", then EOL is CR. If "WILL SGA", then EOL is
CR + NULL. If the other cases, EOL is CR + LF.
=== TOGGLE TELNET COMMAND INTERPRETATION
host.telnetmode # return the current status (true or false)
host.telnetmode = true # do telnet command interpretation (default)
host.telnetmode = false # don't telnet command interpretation
=== TOGGLE NEWLINE TRANSLATION
host.binmode # return the current status (true or false)
host.binmode = true # no translate newline
host.binmode = false # translate newline (default)
=== LOGIN
host.login("username", "password")
host.login({"Name" => "username",
"Password" => "password"})
if no password prompt:
host.login("username")
host.login({"Name" => "username"})
==== REALTIME OUTPUT
host.login("username", "password"){|c| print c }
host.login({"Name" => "username",
"Password" => "password"}){|c| print c }
of cource, set sync=true or flush is necessary.
== EXAMPLE
=== LOGIN AND SEND COMMAND
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
=== CHECKS 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}
=end
# = net/telnet.rb - simple telnet client library
#
# Wakou Aoyama <wakou@ruby-lang.org>
#
# == Overview
#
# This file holds the class Net::Telnet, which provides client-side
# telnet functionality.
#
# 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 of use.
#
# === 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
require "socket"
@ -166,80 +73,200 @@ require "delegate"
require "timeout"
require "English"
module Net
module Net # :nodoc:
# 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 new()). This provides methods
# such as #close() to end the session and #sysread() to
# read data directly from the host, instead of via the
# #waitfor() mechanism. Note that if you do use #sysread()
# directly when in telnet mode, you should probably pass
# the output through #preprocess() to extract telnet command
# sequences.
#
# See the documentation to the telnet.rb file for an overview
# and examples of usage.
class Telnet < SimpleDelegator
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
# :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
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
NULL = "\000"
CR = "\015"
LF = "\012"
EOL = CR + LF
REVISION = '$Id$'
# :startdoc:
def initialize(options)
# 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),
# and all attempts to read data from the host (in #waitfor(),
# #cmd(), and #login()). Exceding this timeout causes a
# TimeoutError to be raised. 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 hand 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")
@ -274,7 +301,7 @@ module Net
@dumplog = File.open(@options["Dump_log"], 'a+')
@dumplog.sync = true
@dumplog.binmode
def @dumplog.log_dump(dir, x)
def @dumplog.log_dump(dir, x) # :nodoc:
len = x.length
addr = 0
offset = 0
@ -338,8 +365,16 @@ module Net
super(@sock)
end # initialize
attr :sock
# 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 :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
@ -351,6 +386,9 @@ module Net
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
@ -359,6 +397,8 @@ module Net
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
@ -370,6 +410,7 @@ module Net
end
end
# Turn newline conversion on (false) or off (true).
def binmode=(mode)
if (true == mode or false == mode)
@options["Binmode"] = mode
@ -378,6 +419,12 @@ module Net
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"]
@ -435,7 +482,40 @@ module Net
end
end # preprocess
def waitfor(options)
# 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 TimeoutError. 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.
#
def waitfor(options) # :yield: recvdata
time_out = @options["Timeout"]
waittime = @options["Waittime"]
@ -503,6 +583,10 @@ module Net
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
@ -512,6 +596,12 @@ module Net
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"]
@ -531,11 +621,41 @@ module Net
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
def cmd(options)
# 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"]
@ -555,7 +675,29 @@ module Net
end
end
def login(options, password = nil)
# 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
if options.kind_of?(Hash)
username = options["Name"]
password = options["Password"]
@ -585,15 +727,6 @@ module Net
line
end
end
end
end # class Telnet
end # module Net
=begin
== HISTORY
delete. see cvs log.
=end