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module Oxidized
require 'net/telnet'
require 'oxidized/input/cli'
class Telnet < Input
RescueFail = {}
include Input::CLI
attr_reader :telnet
def connect node
@node = node
@timeout = Oxidized.config.timeout
@node.model.cfg['telnet'].each { |cb| instance_exec(&cb) }
@log = File.open(Oxidized::Config::Log + "/#{@node.ip}-telnet", 'w') if Oxidized.config.input.debug?
port = vars(:telnet_port) || 23
telnet_opts = { 'Host' => @node.ip,
'Port' => port.to_i,
'Timeout' => @timeout,
'Model' => @node.model,
'Log' => @log }
@telnet = Net::Telnet.new telnet_opts
begin
login
rescue Timeout::Error
raise PromptUndetect, ['unable to detect prompt:', @node.prompt].join(' ')
end
end
def connected?
@telnet and not @telnet.sock.closed?
end
def cmd cmd, expect = @node.prompt
Oxidized.logger.debug "Telnet: #{cmd} @#{@node.name}"
args = { 'String' => cmd }
args.merge!({ 'Match' => expect, 'Timeout' => @timeout }) if expect
@telnet.cmd args
end
def send data
@telnet.write data
end
def output
@telnet.output
end
private
def expect re
@telnet.waitfor 'Match' => re, 'Timeout' => @timeout
end
def disconnect
begin
disconnect_cli
@telnet.close
rescue Errno::ECONNRESET
ensure
@log.close if Oxidized.config.input.debug?
(@telnet.close rescue true) unless @telnet.sock.closed?
end
end
end
end
class Net::Telnet
## FIXME: we just need 'line = model.expects line' to handle pager
## how to do this, without redefining the whole damn thing
## FIXME: we also need output (not sure I'm going to support this)
attr_reader :output
def waitfor(options) # :yield: recvdata
time_out = @options["Timeout"]
waittime = @options["Waittime"]
fail_eof = @options["FailEOF"]
model = @options["Model"]
@log = @options["Log"]
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 Timeout::Error, "timed out while waiting for more data"
end
begin
c = @sock.readpartial(1024 * 1024)
@output = c
@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
if Oxidized.config.input.debug?
@log.print buf
@log.flush
end
line += buf
line = model.expects line
line = yield line if block_given?
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
end
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