Class: Netconf::SSH

Inherits:
Transport show all
Defined in:
lib/net/netconf/ssh.rb

Constant Summary collapse

NETCONF_PORT = 
830
NETCONF_SUBSYSTEM = 
'netconf'

Instance Attribute Summary

Attributes inherited from Transport

#capabilities, #rpc, #session_id, #state, #timeout, #waitio

Instance Method Summary collapse

Methods inherited from Transport

#close, #closed?, #has_capability?, #open, #open?, #rpc_exec, #send_and_receive, #trans_receive_hello, #trans_send_hello

Constructor Details

#initialize(args_h, &block) ⇒ SSH

Returns a new instance of SSH.



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# File 'lib/net/netconf/ssh.rb', line 9

def initialize( args_h, &block )      
  @args = args_h.clone
  @args[:os_type] = args_h[:os_type] || Netconf::DEFAULT_OS_TYPE
  
  # extend this instance with the capabilities of the specific os_type
  begin
    extend Netconf::const_get( @args[:os_type] )::TransSSH        
  rescue NameError
    # no extensions available ...
  end     
  
  @trans = Hash.new   
  super( &block )
end

Instance Method Details

#scp ⇒ Object

accessor to create an Net::SCP object so the caller can perform secure-copy operations (see Net::SCP) for details



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# File 'lib/net/netconf/ssh.rb', line 87

def scp
  @scp ||= Net::SCP.start( @args[:target], @args[:username], :password => @args[:password] )
end

#trans_close ⇒ Object 



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# File 'lib/net/netconf/ssh.rb', line 44

def trans_close     
  @trans[:chan].close if @trans[:chan]
  @trans[:conn].close if @trans[:conn]
end

#trans_open(&block) ⇒ Object 



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# File 'lib/net/netconf/ssh.rb', line 24

def trans_open( &block )
  # open a connection to the NETCONF subsystem        
  start_args = Hash.new
  start_args[:password] ||= @args[:password]
  start_args[:passphrase] = @args[:passphrase] || nil
  start_args[:port] = @args[:port] || NETCONF_PORT
  start_args.merge!(@args[:ssh_args]) if @args[:ssh_args]
        
  begin
    @trans[:conn] = Net::SSH.start( @args[:target], @args[:username], start_args )     
    @trans[:chan] = @trans[:conn].open_channel{ |ch| ch.subsystem( NETCONF_SUBSYSTEM ) }
  rescue Errno::ECONNREFUSED => e
    if self.respond_to? 'trans_on_connect_refused'
      return trans_on_connect_refused( start_args )
    end
    return nil
  end
  @trans[:chan]
end

#trans_receive ⇒ Object 



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# File 'lib/net/netconf/ssh.rb', line 49

def trans_receive
  @trans[:rx_buf] = ''
  @trans[:more] = true
  
  # collect the response data as it comes back ...
  # the "on" functions must be set before calling
  # the #loop method
  
  @trans[:chan].on_data do |ch, data|
    if data.include?( RPC::MSG_END )
      data.slice!( RPC::MSG_END )
      @trans[:rx_buf] << data unless data.empty?
      @trans[:more] = false
    else
      @trans[:rx_buf] << data
    end
  end
  
  # ... if there are errors ... 
  @trans[:chan].on_extended_data do |ch, type, data|
    @trans[:rx_err] = data
    @trans[:more] = false
  end
  
  # the #loop method is what actually performs
  # ssh event processing ...
  
  @trans[:conn].loop { @trans[:more] }        
  
  return @trans[:rx_buf]      
end

#trans_send(cmd_str) ⇒ Object 



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# File 'lib/net/netconf/ssh.rb', line 81

def trans_send( cmd_str )
  @trans[:chan].send_data( cmd_str )  
end