Class: Relp::RelpServer

Inherits:
RelpProtocol show all
Defined in:
lib/relp/server.rb

Instance Method Summary collapse

Methods inherited from RelpProtocol

#create_frame, #frame_read, #frame_write

Constructor Details

#initialize(port, callback, host = '0.0.0.0', tls_context = nil, logger = nil) ⇒ RelpServer

Returns a new instance of RelpServer.



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# File 'lib/relp/server.rb', line 8

def initialize(port, callback, host = '0.0.0.0' , tls_context = nil, logger = nil)
  @logger = logger
  @logger = Logger.new(STDOUT) if logger.nil?
  @socket_list = Array.new
  @callback = callback
  @required_command = 'syslog'

  begin
    @server = TCPServer.new host, port
    if tls_context
      @logger.info "Starting #{self.class} with SSL enabled on %s:%i" % @server.local_address.ip_unpack
      @server = OpenSSL::SSL::SSLServer.new(@server, tls_context)
    else
      @logger.info "Starting #{self.class} on %s:%i" % @server.local_address.ip_unpack
    end
  rescue Errno::EADDRINUSE
    @logger.error  "ERROR Could not start relp server: Port #{port} in use"
    raise Errno::EADDRINUSE
  end
end

Instance Method Details

#ack_frame(socket, txnr) ⇒ Object 



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# File 'lib/relp/server.rb', line 76

def ack_frame(socket, txnr)
  frame = {:txnr => txnr,
           :command => 'rsp',
           :message => "6 200 OK\n"
  }
  frame_write(socket, frame)
end

#return_message(message, callback) ⇒ Object 



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# File 'lib/relp/server.rb', line 67

def return_message(message, callback)
  list_of_messages = message.split(/\n+/)
  list_of_messages.each do |msg|
    remove = msg.split(": ").first + ": "
    msg.slice! remove
    callback.call(msg)
  end
end

#run ⇒ Object 



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# File 'lib/relp/server.rb', line 29

def run
  loop do
    client_socket = @server.accept
    Thread.start(client_socket) do |client_socket|
      begin
        @socket_list.push client_socket
        remote_ip = client_socket.peeraddr[3]
        @logger.info "New client connection coming from ip #{remote_ip}"
        @logger.debug "New client started with object id=#{client_socket.object_id}"
        connection_setup(client_socket)
        while Thread.current.alive? do
          ready = IO.select([client_socket], nil, nil, 10)
          if ready
            frame = communication_processing(client_socket)
            return_message(frame[:message], (@callback))
            ack_frame(client_socket,frame[:txnr])
          end
        end
      rescue Relp::ConnectionClosed
        @logger.info "Connection closed"
      rescue Relp::RelpProtocolError => err
        @logger.warn 'Relp error: ' + err.class.to_s + ' ' + err.message
      rescue OpenSSL::SSL::SSLError => ssl_error
        @logger.error "SSL Error", :exception => ssl_error
      rescue Exception => e
        @logger.debug e
      ensure
        server_close_message(client_socket) rescue nil
        @logger.debug "Closing client socket=#{client_socket.object_id}"
        @logger.info "Client from ip #{remote_ip} closed"
      end
    end
  end
rescue Errno::EINVAL
  # Swallowing exception here because it results even from properly closed socket
  @logger.info "Socket close."
end

#server_close_message(socket) ⇒ Object 



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# File 'lib/relp/server.rb', line 84

def server_close_message(socket)
  Hash.new frame = {:txnr => 0,
           :command => 'close',
           :message => '0'
  }
  begin
    frame_write(socket,frame)
    @logger.debug 'Server close message send'
    socket.close
    @socket_list.delete socket
  rescue Relp::ConnectionClosed
  end
end

#server_shutdown ⇒ Object 



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# File 'lib/relp/server.rb', line 98

def server_shutdown
  @socket_list.each do |client_socket|
    if client_socket != nil
     server_close_message(client_socket)
   end
  end
  @logger.info 'Server shutdown'
  @server.shutdown
  @server = nil
end