Class: HrrRbSsh::Connection::Channel

Inherits:
Object
  • Object
show all
Includes:
Loggable
Defined in:
lib/hrr_rb_ssh/connection/channel.rb,
lib/hrr_rb_ssh/connection/channel/channel_type.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/channel/channel_type/session/request_type/exec.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/shell.rb,
lib/hrr_rb_ssh/connection/channel/channel_type/session/request_type/pty_req.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/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: ChannelType

Constant Summary collapse

INITIAL_WINDOW_SIZE = 
100000
MAXIMUM_PACKET_SIZE = 
100000

Instance Attribute Summary collapse

Attributes included from Loggable

#log_key, #logger

Instance Method Summary collapse

Methods included from Loggable

#log_debug, #log_error, #log_fatal, #log_info, #log_warn

Constructor Details

#initialize(connection, message, socket = nil, logger: nil) ⇒ Channel

Returns a new instance of Channel.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 29

def initialize connection, message, socket=nil, logger: nil
  self.logger = logger

  @connection = connection

  @channel_type = message[:'channel type']
  @local_channel  = connection.assign_channel
  @remote_channel = message[:'sender channel']
  @local_window_size          = INITIAL_WINDOW_SIZE
  @local_maximum_packet_size  = MAXIMUM_PACKET_SIZE
  @remote_window_size         = message[:'initial window size']
  @remote_maximum_packet_size = message[:'maximum packet size']

  @channel_type_instance = ChannelType[@channel_type].new connection, self, message, socket, logger: logger

  @receive_message_queue = Queue.new
  @receive_data_queue = Queue.new
  @receive_extended_data_queue = Queue.new

  @r_io_in,  @w_io_in  = IO.pipe
  @r_io_out, @w_io_out = IO.pipe
  @r_io_err, @w_io_err = IO.pipe

  @channel_closing_monitor = Monitor.new

  @closed = nil
  @exit_status = nil
end

Instance Attribute Details

#channel_type ⇒ Object (readonly)

Returns the value of attribute channel_type.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def channel_type
  @channel_type
end

#exit_status ⇒ Object (readonly)

Returns the value of attribute exit_status.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def exit_status
  @exit_status
end

#local_channel ⇒ Object (readonly)

Returns the value of attribute local_channel.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def local_channel
  @local_channel
end

#local_maximum_packet_size ⇒ Object (readonly)

Returns the value of attribute local_maximum_packet_size.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def local_maximum_packet_size
  @local_maximum_packet_size
end

#local_window_size ⇒ Object (readonly)

Returns the value of attribute local_window_size.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def local_window_size
  @local_window_size
end

#receive_message_queue ⇒ Object (readonly)

Returns the value of attribute receive_message_queue.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def receive_message_queue
  @receive_message_queue
end

#remote_channel ⇒ Object (readonly)

Returns the value of attribute remote_channel.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def remote_channel
  @remote_channel
end

#remote_maximum_packet_size ⇒ Object (readonly)

Returns the value of attribute remote_maximum_packet_size.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def remote_maximum_packet_size
  @remote_maximum_packet_size
end

#remote_window_size ⇒ Object (readonly)

Returns the value of attribute remote_window_size.



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 18

def remote_window_size
  @remote_window_size
end

Instance Method Details

#channel_loop_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 164

def channel_loop_thread
  Thread.start do
    log_info { "start channel loop thread" }
    begin
      loop do
        begin
          message = @receive_message_queue.deq
          if message.nil? && @receive_message_queue.closed?
            break
          end
          case message[:'message number']
          when Message::SSH_MSG_CHANNEL_EOF::VALUE
            @receive_data_queue.close
            @receive_extended_data_queue.close
          when Message::SSH_MSG_CHANNEL_REQUEST::VALUE
            log_info { "received channel request: #{message[:'request type']}" }
            case @connection.mode
            when Mode::SERVER
              begin
                @channel_type_instance.request message
              rescue => e
                log_warn { "request failed: #{e.message}" }
                send_channel_failure if message[:'want reply']
              else
                send_channel_success if message[:'want reply']
              end
            when Mode::CLIENT
              case message[:'request type']
              when "exit-status"
                log_info { "exit status: #{message[:'exit status']}" }
                @exit_status = message[:'exit status'].to_i
              end
            end
          when Message::SSH_MSG_CHANNEL_DATA::VALUE
            log_info { "received channel data" }
            local_channel = message[:'recipient channel']
            @receive_data_queue.enq message[:'data']
          when Message::SSH_MSG_CHANNEL_EXTENDED_DATA::VALUE
            log_info { "received channel extended data" }
            local_channel = message[:'recipient channel']
            @receive_extended_data_queue.enq message[:'data']
          when Message::SSH_MSG_CHANNEL_WINDOW_ADJUST::VALUE
            log_info { "received channel window adjust" }
            @remote_window_size = [@remote_window_size + message[:'bytes to add'], 0xffff_ffff].min
          else
            log_warn { "received unsupported message: #{message.inspect}" }
          end
        rescue => e
          log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
          close from=:channel_loop_thread
          break
        end
      end
    ensure
      log_info { "closing channel loop thread" }
      @receive_data_queue.close
      @receive_extended_data_queue.close
    end
    log_info { "channel loop thread closed" }
  end
end

#close(from = :outside, exitstatus = 0) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 111

def close from=:outside, exitstatus=0
  @channel_closing_monitor.synchronize {
    return if @closed
    log_info { "close channel" }
    @closed = true
  }
  unless from == :channel_type_instance
    @channel_type_instance.close
  end
  @receive_message_queue.close
  begin
    if from == :channel_type_instance
      send_channel_eof
      case exitstatus
      when Integer
        send_channel_request_exit_status exitstatus
      else
        log_warn { "skip sending exit-status because exitstatus is not an instance of Integer" }
      end
    elsif from == :sender_thread
      send_channel_eof
    end
    send_channel_close
  rescue Error::ClosedConnection => e
    Thread.pass
  rescue => e
    log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
  end
  log_info { "channel closed" }
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 160

def closed?
  @closed
end

#err_receiver_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 344

def err_receiver_thread
  Thread.start {
    log_info { "start err receiver thread" }
    loop do
      begin
        data = @receive_extended_data_queue.deq
        if data.nil? && @receive_extended_data_queue.closed?
          log_info { "closing err receiver thread" }
          log_info { "closing w_io_err" }
          @w_io_err.close
          log_info { "w_io_err closed" }
          break
        end
        @w_io_err.write data
        @local_window_size -= data.size
        if @local_window_size < INITIAL_WINDOW_SIZE/2
          log_info { "send channel window adjust" }
          send_channel_window_adjust
          @local_window_size += INITIAL_WINDOW_SIZE
        end
      rescue Error::EPIPE, IOError => e
        close
        break
      rescue => e
        log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
        close
        break
      end
    end
    log_info { "err receiver thread closed" }
  }
end

#err_sender_thread ⇒ Object 



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

def err_sender_thread
  Thread.start {
    log_info { "start err sender thread" }
    loop do
      if @r_io_err.closed?
        log_info { "closing err sender thread" }
        break
      end
      begin
        data = @r_io_err.readpartial(10240)
        sendable_size = [data.size, @remote_window_size].min
        sending_data = data[0, sendable_size]
        send_channel_extended_data sending_data if sendable_size > 0
        @remote_window_size -= sendable_size
      rescue EOFError, IOError => e
        @r_io_err.close rescue nil
      rescue => e
        log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
        @r_io_err.close rescue nil
        close
      end
    end
    log_info { "err sender thread closed" }
  }
end

#io ⇒ Object 



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

def io
  case @connection.mode
  when Mode::SERVER
    [@r_io_in, @w_io_out, @w_io_err]
  when Mode::CLIENT
    [@w_io_in, @r_io_out, @r_io_err]
  end
end

#out_receiver_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 311

def out_receiver_thread
  Thread.start {
    log_info { "start out receiver thread" }
    loop do
      begin
        data = @receive_data_queue.deq
        if data.nil? && @receive_data_queue.closed?
          log_info { "closing out receiver thread" }
          log_info { "closing w_io_out" }
          @w_io_out.close
          log_info { "w_io_out closed" }
          break
        end
        @w_io_out.write data
        @local_window_size -= data.size
        if @local_window_size < INITIAL_WINDOW_SIZE/2
          log_info { "send channel window adjust" }
          send_channel_window_adjust
          @local_window_size += INITIAL_WINDOW_SIZE
        end
      rescue Errno::EPIPE, IOError => e
        close
        break
      rescue => e
        log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
        close
        break
      end
    end
    log_info { "out receiver thread closed" }
  }
end

#out_sender_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 226

def out_sender_thread
  Thread.start {
    log_info { "start out sender thread" }
    loop do
      if @r_io_out.closed?
        log_info { "closing out sender thread" }
        break
      end
      begin
        data = @r_io_out.readpartial(10240)
        sendable_size = [data.size, @remote_window_size].min
        sending_data = data[0, sendable_size]
        send_channel_data sending_data if sendable_size > 0
        @remote_window_size -= sendable_size
      rescue EOFError, IOError => e
        @r_io_out.close rescue nil
      rescue => e
        log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
        @r_io_out.close rescue nil
        close
      end
    end
    log_info { "out sender thread closed" }
  }
end

#receiver_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 278

def receiver_thread
  Thread.start {
    log_info { "start receiver thread" }
    loop do
      begin
        data = @receive_data_queue.deq
        if data.nil? && @receive_data_queue.closed?
          log_info { "closing receiver thread" }
          log_info { "closing w_io_in" }
          @w_io_in.close
          log_info { "w_io_in closed" }
          break
        end
        @w_io_in.write data
        @local_window_size -= data.size
        if @local_window_size < INITIAL_WINDOW_SIZE/2
          log_info { "send channel window adjust" }
          send_channel_window_adjust
          @local_window_size += INITIAL_WINDOW_SIZE
        end
      rescue Errno::EPIPE, IOError => e
        close
        break
      rescue => e
        log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
        close
        break
      end
    end
    log_info { "receiver thread closed" }
  }
end

#send_channel_close ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 565

def send_channel_close
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_CLOSE::VALUE,
    :'recipient channel' => @remote_channel,
  }
  payload = Message::SSH_MSG_CHANNEL_CLOSE.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_data(data) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 431

def send_channel_data data
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_DATA::VALUE,
    :'recipient channel' => @remote_channel,
    :'data'              => data,
  }
  payload = Message::SSH_MSG_CHANNEL_DATA.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_eof ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 556

def send_channel_eof
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_EOF::VALUE,
    :'recipient channel' => @remote_channel,
  }
  payload = Message::SSH_MSG_CHANNEL_EOF.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_extended_data(data, code = Message::SSH_MSG_CHANNEL_EXTENDED_DATA::DataTypeCode::SSH_EXTENDED_DATA_STDERR) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 441

def send_channel_extended_data data, code=Message::SSH_MSG_CHANNEL_EXTENDED_DATA::DataTypeCode::SSH_EXTENDED_DATA_STDERR
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_EXTENDED_DATA::VALUE,
    :'recipient channel' => @remote_channel,
    :'data type code'    => code,
    :'data'              => data,
  }
  payload = Message::SSH_MSG_CHANNEL_EXTENDED_DATA.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_failure ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 412

def send_channel_failure
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_FAILURE::VALUE,
    :'recipient channel' => @remote_channel,
  }
  payload = Message::SSH_MSG_CHANNEL_FAILURE.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_env(variable_name, variable_value) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 469

def send_channel_request_env variable_name, variable_value
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel' => @remote_channel,
    :'request type'      => "env",
    :'want reply'        => false,
    :'variable name'     => variable_name,
    :'variable value'    => variable_value,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_exec(command) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 493

def send_channel_request_exec command
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel' => @remote_channel,
    :'request type'      => "exec",
    :'want reply'        => false,
    :'command'           => command,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_exit_status(exitstatus) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 544

def send_channel_request_exit_status exitstatus
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel' => @remote_channel,
    :'request type'      => "exit-status",
    :'want reply'        => false,
    :'exit status'       => exitstatus,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_pty_req(term_env_var_val, term_width_chars, term_height_rows, term_width_pixel, term_height_pixel, encoded_term_modes) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 452

def send_channel_request_pty_req term_env_var_val, term_width_chars, term_height_rows, term_width_pixel, term_height_pixel, encoded_term_modes
  message = {
    :'message number'                  => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel'               => @remote_channel,
    :'request type'                    => "pty-req",
    :'want reply'                      => false,
    :'TERM environment variable value' => term_env_var_val,
    :'terminal width, characters'      => term_width_chars,
    :'terminal height, rows'           => term_height_rows,
    :'terminal width, pixels'          => term_width_pixel,
    :'terminal height, pixels'         => term_height_pixel,
    :'encoded terminal modes'          => encoded_term_modes,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_shell ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 482

def send_channel_request_shell
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel' => @remote_channel,
    :'request type'      => "shell",
    :'want reply'        => false,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_signal(signal_name) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 532

def send_channel_request_signal signal_name
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel' => @remote_channel,
    :'request type'      => "signal",
    :'want reply'        => false,
    :'signal name'       => signal_name,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_subsystem(subsystem_name) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 505

def send_channel_request_subsystem subsystem_name
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel' => @remote_channel,
    :'request type'      => "subsystem",
    :'want reply'        => false,
    :'subsystem name'    => subsystem_name,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_request_window_change(term_width_cols, term_height_rows, term_width_pixel, term_height_pixel) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 517

def send_channel_request_window_change term_width_cols, term_height_rows, term_width_pixel, term_height_pixel
  message = {
    :'message number'          => Message::SSH_MSG_CHANNEL_REQUEST::VALUE,
    :'recipient channel'       => @remote_channel,
    :'request type'            => "window-change",
    :'want reply'              => false,
    :'terminal width, columns' => term_width_cols,
    :'terminal height, rows'   => term_height_rows,
    :'terminal width, pixels'  => term_width_pixel,
    :'terminal height, pixels' => term_height_pixel,
  }
  payload = Message::SSH_MSG_CHANNEL_REQUEST.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_success ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 403

def send_channel_success
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_SUCCESS::VALUE,
    :'recipient channel' => @remote_channel,
  }
  payload = Message::SSH_MSG_CHANNEL_SUCCESS.new(logger: logger).encode message
  @connection.send payload
end

#send_channel_window_adjust ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 421

def send_channel_window_adjust
  message = {
    :'message number'    => Message::SSH_MSG_CHANNEL_WINDOW_ADJUST::VALUE,
    :'recipient channel' => @remote_channel,
    :'bytes to add'      => INITIAL_WINDOW_SIZE,
  }
  payload = Message::SSH_MSG_CHANNEL_WINDOW_ADJUST.new(logger: logger).encode message
  @connection.send payload
end

#sender_thread ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 377

def sender_thread
  Thread.start {
    log_info { "start sender thread" }
    loop do
      if @r_io_in.closed?
        log_info { "closing sender thread" }
        break
      end
      begin
        data = @r_io_in.readpartial(10240)
        sendable_size = [data.size, @remote_window_size].min
        sending_data = data[0, sendable_size]
        send_channel_data sending_data if sendable_size > 0
        @remote_window_size -= sendable_size
      rescue EOFError, IOError => e
        @r_io_in.close rescue nil
      rescue => e
        log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
        @r_io_in.close rescue nil
      end
    end
    close from=:sender_thread
    log_info { "sender thread closed" }
  }
end

#set_remote_parameters(message) ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 58

def set_remote_parameters message
  @remote_channel = message[:'sender channel']
  @remote_window_size = message[:'initial window size']
  @remote_maximum_packet_size = message[:'maximum packet size']
end

#start ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 73

def start
  @channel_loop_thread = channel_loop_thread
  case @connection.mode
  when Mode::SERVER
    @out_sender_thread   = out_sender_thread
    @err_sender_thread   = err_sender_thread
    @receiver_thread     = receiver_thread
    @channel_type_instance.start
  when Mode::CLIENT
    @out_receiver_thread = out_receiver_thread
    @err_receiver_thread = err_receiver_thread
    @sender_thread       = sender_thread
    @channel_type_instance.start
  end
  @closed = false
  log_debug { "in start: #{@waiting_thread.inspect}" }
  @waiting_thread.wakeup if @waiting_thread
end

#wait_until_closed ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 142

def wait_until_closed
  [
    @out_sender_thread,
    @err_sender_thread,
    @receiver_thread,
    @out_receiver_thread,
    @err_receiver_thread,
    @sender_thread,
    @channel_loop_thread
  ].each{ |t|
    begin
      t.join if t.instance_of? Thread
    rescue => e
      log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
    end
  }
end

#wait_until_senders_closed ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 98

def wait_until_senders_closed
  [
    @out_sender_thread,
    @err_sender_thread,
  ].each{ |t|
    begin
      t.join if t.instance_of? Thread
    rescue => e
      log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
    end
  }
end

#wait_until_started ⇒ Object 



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# File 'lib/hrr_rb_ssh/connection/channel.rb', line 92

def wait_until_started
  @waiting_thread = Thread.current
  log_debug { "in wait_until_started: #{@waiting_thread.inspect}" }
  Thread.stop
end