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#--
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# CyborgHood, a distributed system management software.
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# Copyright (c) 2009-2011 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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module CyborgHood
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module DSL
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module BotnetTask
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def ask(peer, key, cmd, *args)
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action_name = ['ask', cmd, *args].hash
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_add_subtask_using_peer(action_name, key, peer, cmd, args) do |conv_thread, env, cmd, args, reply_cb|
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if peer == :self
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@bot.interface._call(nil, env, cmd, args, &reply_cb)
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else
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conv_thread.call(env, cmd, *args, &reply_cb)
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end
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end
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end
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def know?(peer, key, cmd)
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action_name = ['know', cmd].hash
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_add_subtask_using_peer(action_name, key, peer, cmd, args) do |conv_thread, env, cmd, args, reply_cb|
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if peer == :self
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@bot.interface._is_node?(nil, env, cmd, &reply_cb)
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else
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conv_thread.exists?(env, cmd, &reply_cb)
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end
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end
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end
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def _add_subtask_using_peer(action_name, key, peer, cmd, args = nil, &cmd_cb)
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subtask_name = "botnet/peer/#{peer}/#{action_name}/out"
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_add_subtask(subtask_name) do |subtask|
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if peer == :self
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logger.debug "Task '#{@name}': Talking to oneself"
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else
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logger.debug "Task '#{@name}': Trying to contact peer '#{peer}'"
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end
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# callback to end peer action and subtask
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# (used when shooting the task)
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defuse_peer_action_cb = Proc.new do
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logger.debug "Task '#{@name}': defusing subtask '#{subtask.name}'"
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subtask.finish unless subtask.finished?
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# we already own the mutex here
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registered_resources.delete(subtask_name)
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end
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# register peer action in the task
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tasks_info_mutex.synchronize do
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registered_resources[subtask_name] = defuse_peer_action_cb
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end
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cmd = cmd.call if cmd.is_a? Proc
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args.collect!{|a| a.is_a?(Proc) ? a.call : a }
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# catch current environment to transmit it
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env = {
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:preferred_locales => @preferred_locales,
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:user => @user
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}
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reply_cb = Proc.new do |reply|
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case reply[:status]
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when :ok
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subtask.results = {key => reply[:result]}
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when :decline
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# TODO: remove this case ???
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when :error
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subtask.errors += reply[:exceptions]
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end
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subtask.finish
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end
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if peer == :self
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_run_subtask_using_peer_local(subtask, env, cmd, args, cmd_cb, reply_cb)
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else
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_run_subtask_using_peer_remote(subtask, env, peer, cmd, args, cmd_cb, reply_cb)
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end
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end
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end
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def _run_subtask_using_peer_remote(subtask, env, peer, cmd, args, cmd_cb, reply_cb)
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@bot.contact_peer(peer) do |conv|
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if conv
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logger.debug "Task '#{@name}': subtask '#{subtask.name}': peer '#{peer}' contacted, starting conversation"
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@peer_contacted << peer
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# don't use the block call to leave the conversation thread open
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conv_thread = conv.thread(@notification_name)
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cmd_cb.call(conv_thread, env, cmd, args, reply_cb)
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else
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logger.debug "Task '#{@name}': Could not contact peer '#{peer}'"
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subtask.errors << CyberError.new(:unrecoverable, "botnet/client/dsl", "Task '#{@name}': could not contact peer '#{peer}'")
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subtask.finish
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end
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end
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end
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def _run_subtask_using_peer_local(subtask, env, cmd, args, cmd_cb, reply_cb)
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process_result_cb = Proc.new do |reply|
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# reformat reply
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new_reply = {
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:status => :ok,
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:result => reply[:results]
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}
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reply_cb.call new_reply
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end
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begin
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cmd_cb.call(nil, env, cmd, args, process_result_cb)
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rescue CyberError => e
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subtask.errors << e
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subtask.finish
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rescue
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subtask.errors << CyberError.new(:unrecoverable, 'unknown', $!.message)
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subtask.finish
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end
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end
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def _setup
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super
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@peer_contacted = Set.new
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end
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def _finished
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super
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# close opened thread
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cb = Proc.new do |conv|
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conv.close_thread(@notification_name)
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end
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# loop on all contacted peers to close the thread
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@peer_contacted.each do |peer|
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@bot.contact_peer(peer, true, &cb)
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end
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end
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end
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Task.class_eval("include BotnetTask")
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end
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end
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