Class: HrrRbSsh::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/hrr_rb_ssh/connection.rb,
lib/hrr_rb_ssh/connection/channel.rb,
lib/hrr_rb_ssh/connection/request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type.rb,
lib/hrr_rb_ssh/connection/global_request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/direct_tcpip.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/forwarded_tcpip.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/proc_chain.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/env.rb,
lib/hrr_rb_ssh/connection/request_handler/reference_env_request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/exec.rb,
lib/hrr_rb_ssh/connection/request_handler/reference_exec_request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/shell.rb,
lib/hrr_rb_ssh/connection/request_handler/reference_shell_request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/pty_req.rb,
lib/hrr_rb_ssh/connection/request_handler/reference_pty_req_request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/subsystem.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/proc_chain/chain_context.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/env/context.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/exec/context.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/shell/context.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/window_change.rb,
lib/hrr_rb_ssh/connection/request_handler/reference_window_change_request_handler.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/pty_req/context.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/subsystem/context.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/window_change/context.rb

Defined Under Namespace

Classes: Channel, GlobalRequestHandler, RequestHandler

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(authentication, mode, options = {}) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/hrr_rb_ssh/connection.rb', line 17

def initialize authentication, mode, options={}
  @logger = Logger.new self.class.name

  @authentication = authentication
  @mode = mode
  @options = options

  @global_request_handler = GlobalRequestHandler.new self
  @channels = Hash.new
  @username = nil
  @variables = nil
  @closed = nil
end

Instance Attribute Details

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/hrr_rb_ssh/connection.rb', line 11

def mode
  @mode
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/hrr_rb_ssh/connection.rb', line 11

def options
  @options
end

#username ⇒ Object (readonly)

Returns the value of attribute username.



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# File 'lib/hrr_rb_ssh/connection.rb', line 11

def username
  @username
end

#variables ⇒ Object (readonly)

Returns the value of attribute variables.



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# File 'lib/hrr_rb_ssh/connection.rb', line 11

def variables
  @variables
end

Instance Method Details

#assign_channel ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 40

def assign_channel
  i = 0
  res = nil
  while true
    break unless @channels.keys.include?(i)
    i += 1
  end
  i
end

#channel_close(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 252

def channel_close payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_CLOSE::ID }
  message = Message::SSH_MSG_CHANNEL_CLOSE.decode payload
  local_channel = message[:'recipient channel']
  channel = @channels[local_channel]
  channel.close
  @logger.info { "wait until threads closed in channel" }
  channel.wait_until_closed
  @logger.info { "channel closed" }
  @logger.info { "deleting channel" }
  @channels.delete local_channel
  @logger.info { "channel deleted" }
end

#channel_data(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 231

def channel_data payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_DATA::ID }
  message = Message::SSH_MSG_CHANNEL_DATA.decode payload
  local_channel = message[:'recipient channel']
  @channels[local_channel].receive_message_queue.enq message
end

#channel_eof(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 245

def channel_eof payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_EOF::ID }
  message = Message::SSH_MSG_CHANNEL_EOF.decode payload
  local_channel = message[:'recipient channel']
  @channels[local_channel].receive_message_queue.enq message
end

#channel_extended_data(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 238

def channel_extended_data payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_EXTENDED_DATA::ID }
  message = Message::SSH_MSG_CHANNEL_EXTENDED_DATA.decode payload
  local_channel = message[:'recipient channel']
  @channels[local_channel].receive_message_queue.enq message
end

#channel_open(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 166

def channel_open payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_OPEN::ID }
  message = Message::SSH_MSG_CHANNEL_OPEN.decode payload
  begin
    channel = Channel.new self, message
    @channels[channel.local_channel] = channel
    channel.start
    send_channel_open_confirmation channel
  rescue => e
    @logger.error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
    recipient_channel = message[:'sender channel']
    send_channel_open_failure recipient_channel, Message::SSH_MSG_CHANNEL_OPEN_FAILURE::ReasonCode::SSH_OPEN_CONNECT_FAILED, e.message
  end
end

#channel_open_confirmation(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 209

def channel_open_confirmation payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_OPEN_CONFIRMATION::ID }
  message = Message::SSH_MSG_CHANNEL_OPEN_CONFIRMATION.decode payload
  channel = @channels[message[:'recipient channel']]
  channel.set_remote_parameters message
  channel.start
end

#channel_open_start(address, port, socket) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 147

def channel_open_start address, port, socket
  @logger.info { 'channel open start' }
  channel = Channel.new self, {:'channel type' => "forwarded-tcpip"}, socket
  @channels[channel.local_channel] = channel
  @logger.info { 'channel opened' }
  message = {
    :'message number'             => Message::SSH_MSG_CHANNEL_OPEN::VALUE,
    :'channel type'               => "forwarded-tcpip",
    :'sender channel'             => channel.local_channel,
    :'initial window size'        => channel.local_window_size,
    :'maximum packet size'        => channel.local_maximum_packet_size,
    :'address that was connected' => address,
    :'port that was connected'    => port,
    :'originator IP address'      => socket.remote_address.ip_address,
    :'originator port'            => socket.remote_address.ip_port,
  }
  send_channel_open message
end

#channel_request(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 217

def channel_request payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_REQUEST::ID }
  message = Message::SSH_MSG_CHANNEL_REQUEST.decode payload
  local_channel = message[:'recipient channel']
  @channels[local_channel].receive_message_queue.enq message
end

#channel_window_adjust(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 224

def channel_window_adjust payload
  @logger.info { 'received ' + Message::SSH_MSG_CHANNEL_WINDOW_ADJUST::ID }
  message = Message::SSH_MSG_CHANNEL_WINDOW_ADJUST.decode payload
  local_channel = message[:'recipient channel']
  @channels[local_channel].receive_message_queue.enq message
end

#close ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 64

def close
  @logger.info { "closing connection" }
  @closed = true
  @authentication.close
  @channels.values.each do |channel|
    begin
      channel.close
    rescue => e
      @logger.error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
    end
  end
  @channels.clear
  @global_request_handler.close
  @connection_loop_thread.join unless @connection_loop_thread == Thread.current
  @logger.info { "connection closed" }
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hrr_rb_ssh/connection.rb', line 81

def closed?
  @closed
end

#connection_loop_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 85

def connection_loop_thread
  @logger.info { "start connection loop" }
  Thread.new do
    begin
      while true
        begin
          payload = @authentication.receive
        rescue Error::ClosedAuthentication => e
          @logger.info { "authentication closed" }
          break
        end
        @username ||= @authentication.username
        @variables ||= @authentication.variables
        case payload[0,1].unpack("C")[0]
        when Message::SSH_MSG_GLOBAL_REQUEST::VALUE
          global_request payload
        when Message::SSH_MSG_CHANNEL_OPEN::VALUE
          channel_open payload
        when Message::SSH_MSG_CHANNEL_OPEN_CONFIRMATION::VALUE
          channel_open_confirmation payload
        when Message::SSH_MSG_CHANNEL_REQUEST::VALUE
          channel_request payload
        when Message::SSH_MSG_CHANNEL_WINDOW_ADJUST::VALUE
          channel_window_adjust payload
        when Message::SSH_MSG_CHANNEL_DATA::VALUE
          channel_data payload
        when Message::SSH_MSG_CHANNEL_EXTENDED_DATA::VALUE
          channel_extended_data payload
        when Message::SSH_MSG_CHANNEL_EOF::VALUE
          channel_eof payload
        when Message::SSH_MSG_CHANNEL_CLOSE::VALUE
          channel_close payload
        else
          @logger.warn { "received unsupported message: id: #{payload[0,1].unpack("C")[0]}" }
        end
      end
    rescue => e
      @logger.error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
    ensure
      @logger.info { "closing connection loop" }
      close
      @logger.info { "connection loop closed" }
    end
  end
end

#global_request(payload) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 131

def global_request payload
  @logger.info { 'received ' + Message::SSH_MSG_GLOBAL_REQUEST::ID }
  message = Message::SSH_MSG_GLOBAL_REQUEST.decode payload
  begin
    @global_request_handler.request message
  rescue
    if message[:'want reply']
      send_request_failure
    end
  else
    if message[:'want reply']
      send_request_success
    end
  end
end

#loop ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 60

def loop
  @connection_loop_thread.join
end

#request_channel_open(channel_type, channel_specific_message = {}, wait_response = true) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 181

def request_channel_open channel_type, channel_specific_message={}, wait_response=true
  @logger.info { 'request channel open' }
  case channel_type
  when "session"
    channel = Channel.new self, {:'channel type' => channel_type}
    @channels[channel.local_channel] = channel
  end
  message = {
    :'message number'             => Message::SSH_MSG_CHANNEL_OPEN::VALUE,
    :'channel type'               => channel_type,
    :'sender channel'             => channel.local_channel,
    :'initial window size'        => channel.local_window_size,
    :'maximum packet size'        => channel.local_maximum_packet_size,
  }
  send_channel_open message.merge(channel_specific_message)
  @logger.info { 'sent channel open' }
  if wait_response
    @logger.info { 'wait response' }
    channel.wait_until_started
  end
  unless channel.closed?
    @logger.info { 'channel opened' }
    channel
  else
    raise "Faild opening channel"
  end
end

#send(payload) ⇒ Object

Raises:



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# File 'lib/hrr_rb_ssh/connection.rb', line 31

def send payload
  raise Error::ClosedConnection if @closed
  begin
    @authentication.send payload
  rescue Error::ClosedAuthentication
    raise Error::ClosedConnection
  end
end

#send_channel_open(message) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 282

def send_channel_open message
  payload = Message::SSH_MSG_CHANNEL_OPEN.encode message
  @authentication.send payload
end

#send_channel_open_confirmation(channel) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 287

def send_channel_open_confirmation channel
  message = {
    :'message number'      => Message::SSH_MSG_CHANNEL_OPEN_CONFIRMATION::VALUE,
    :'channel type'        => channel.channel_type,
    :'recipient channel'   => channel.remote_channel,
    :'sender channel'      => channel.local_channel,
    :'initial window size' => channel.local_window_size,
    :'maximum packet size' => channel.local_maximum_packet_size,
  }
  payload = Message::SSH_MSG_CHANNEL_OPEN_CONFIRMATION.encode message
  @authentication.send payload
end

#send_channel_open_failure(recipient_channel, reason_code, description) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 300

def send_channel_open_failure recipient_channel, reason_code, description
  message = {
    :'message number'      => Message::SSH_MSG_CHANNEL_OPEN_FAILURE::VALUE,
    :'recipient channel'   => recipient_channel,
    :'reason code'         => reason_code,
    :'description'         => description,
    :'language tag'        => "",
  }
  payload = Message::SSH_MSG_CHANNEL_OPEN_FAILURE.encode message
  @authentication.send payload
end

#send_request_failure ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 274

def send_request_failure
  message = {
    :'message number' => Message::SSH_MSG_REQUEST_FAILURE::VALUE,
  }
  payload = Message::SSH_MSG_REQUEST_FAILURE.encode message
  @authentication.send payload
end

#send_request_success ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 266

def send_request_success
  message = {
    :'message number' => Message::SSH_MSG_REQUEST_SUCCESS::VALUE,
  }
  payload = Message::SSH_MSG_REQUEST_SUCCESS.encode message
  @authentication.send payload
end

#start(foreground: true) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection.rb', line 50

def start foreground: true
  @logger.info { "start connection" }
  @authentication.start
  @closed = false
  @connection_loop_thread = connection_loop_thread
  if foreground
    @connection_loop_thread.join
  end
end