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#--
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# CyborgHood, a distributed system management software.
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# Copyright (c) 2009-2010 Marc Dequènes (Duck) <Duck@DuckCorp.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#++
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require 'eventmachine'
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require 'cyborghood/cyborg/interface'
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require 'shellwords'
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module CyborgHood
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class BotServer
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private_class_method :new
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def self.build(interface)
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case Config.instance.botnet.connection_type
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when 'unix_socket'
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return BotServerUNIXSocket.new(interface)
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else
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raise CyberError.new(:unrecoverable, "config", "Unknown botnet connection type")
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end
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end
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def initialize(interface)
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@interface = interface
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@config = Config.instance
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end
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def run
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EventMachine.run do
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yield
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end
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end
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def stop
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EventMachine.stop
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end
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end
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class BotServerUNIXSocket < BotServer
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public_class_method :new
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def initialize(interface)
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super(interface)
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@socket = File.join(Config::RUN_DIR, @config.bot_name.downcase + ".sock")
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at_exit { remove_socket_file }
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end
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def run
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super do
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EventMachine.start_unix_domain_server(@socket, ConversationUNIXSocket, @interface)
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end
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end
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private
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def remove_socket_file
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File.delete(@socket) if @socket && File.exist?(@socket)
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end
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end
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class Conversation < EventMachine::Protocols::LineAndTextProtocol
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private_class_method :new
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# don't rely on EventMachine's default, it may change one day
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MaxLineLength = 16*1024
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EOD = "\033[0J"
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COMMAND_PATTERN = "^#{CyborgServerInterfaceBase::NODE_PATTERN}(?: ([+?]+))?$"
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def initialize(interface)
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@interface = interface
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super
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@config = Config.instance
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@split_data_mode = false
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@split_data_cmd = nil
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@split_data = []
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end
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def send_line(msg)
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send_data "#{msg}\n"
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logger.debug "Sent data [#{identifier}]: #{msg}"
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end
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def post_init
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logger.debug "New conversation with #{identifier}"
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send_line "220 #{PRODUCT} #{VERSION} - #{@config.bot_name}"
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end
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def receive_line(data)
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return if data.empty?
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if data == EOD
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logger.debug "Received EOD [#{identifier}]"
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exit_split_mode
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else
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if @split_data_mode
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logger.debug "Received data (split mode) [#{identifier}]: #{data}"
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@split_data << data
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else
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logger.debug "Received data [#{identifier}]: #{data}"
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unless data =~ Regexp.new(COMMAND_PATTERN)
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logger.error "Error [#{identifier}]: syntax error"
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send_line "552 syntax error in command"
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return
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end
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cmd = $1
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flags = $2 || ""
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pp "GROK"
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pp cmd
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pp flags
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if flags.index '?'
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send_line "250+ ok"
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send_line({'exists?' => @interface.has_node?(cmd)}.to_yaml)
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return
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end
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if flags.index '+'
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enter_split_mode(cmd)
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else
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receive_command(cmd)
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end
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end
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end
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end
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def receive_command(cmd, data = nil)
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logger.debug "Executing command '#{cmd}' [#{identifier}]"
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send_line @interface.call(cmd, data)
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end
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def receive_error(msg)
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logger.error "Error [#{identifier}]: #{msg}"
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end
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def unbind
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logger.debug "Conversation finished with #{identifier}"
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end
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protected
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def enter_split_mode(cmd)
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if @split_data_mode
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logger.error "Error [#{identifier}]: already in split mode"
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send_line "551 protocol error"
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@split_data_mode = false
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@split_data_cmd = nil
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else
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logger.debug "Entered split mode for command '#{cmd}' [#{identifier}]"
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@split_data_mode = true
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@split_data_cmd = cmd
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end
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@split_data = []
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end
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def exit_split_mode
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if @split_data_mode
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logger.debug "Quit split mode for command '#{@split_data_cmd}' [#{identifier}]"
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receive_command(@split_data_cmd, @split_data.join("\n"))
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else
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logger.error "Error [#{identifier}]: not in split mode"
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send_line "551 protocol error"
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end
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@split_data_mode = false
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@split_data_cmd = nil
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@split_data = []
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end
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end
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class ConversationUNIXSocket < Conversation
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public_class_method :new
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def identifier
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"unix_socket/#{@signature}"
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end
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end
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class EmptyInterface
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include CyborgServerInterface
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include CyborgServerDefaultInterface
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end
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module SimpleServer
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def setup
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super
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@server = BotServer.build(self.interface)
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end
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def run
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super
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@server.run
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end
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def ask_to_stop
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@server.stop
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super
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end
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def interface
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EmptyInterface.instance
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end
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end
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end
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