Class: Lib::DHCP::Option122::SubOption::Option3

Inherits:
Option show all
Defined in:
lib/lib/dhcp/options/option122.rb

Constant Summary

Constants inherited from Lib::DHCP::Option

Lib::DHCP::Option::ARP_TIMEOUT, Lib::DHCP::Option::ASSOCIATED_IP, Lib::DHCP::Option::BOOT_FILE_NAME, Lib::DHCP::Option::BOOT_FILE_SIZE, Lib::DHCP::Option::BROADCAST_ADDR, Lib::DHCP::Option::CLIENT_IDENTIFIER, Lib::DHCP::Option::CLIENT_LAST_TRANSACTION_TIME, Lib::DHCP::Option::COOKIE_SERVER, Lib::DHCP::Option::DNS_SERVER, Lib::DHCP::Option::DOMAIN_NAME, Lib::DHCP::Option::DO_MASK_DISCOVER, Lib::DHCP::Option::DO_ROUTE_DISCOVER, Lib::DHCP::Option::DUMP_FILE, Lib::DHCP::Option::END_OPTION, Lib::DHCP::Option::ETHERNET_ENCAPSULATION, Lib::DHCP::Option::EXTENSION_PATH, Lib::DHCP::Option::FINGER_SERVER, Lib::DHCP::Option::HOSTNAME, Lib::DHCP::Option::IMP_SERVER, Lib::DHCP::Option::IP_FORWARD, Lib::DHCP::Option::IP_TTL, Lib::DHCP::Option::IRC_SERVER, Lib::DHCP::Option::LEASE_TIME, Lib::DHCP::Option::LOCAL_SUBNETS, Lib::DHCP::Option::LOG_SERVER, Lib::DHCP::Option::LPR_SERVER, Lib::DHCP::Option::MASK_SUPPLY, Lib::DHCP::Option::MAX_MESSAGE_SIZE, Lib::DHCP::Option::MAX_REASSEMBLE_SIZE, Lib::DHCP::Option::MESSAGE, Lib::DHCP::Option::MESSAGE_TYPE, Lib::DHCP::Option::MOBILE_IP_AGENT, Lib::DHCP::Option::MTU_SIZE, Lib::DHCP::Option::MTU_TABLE, Lib::DHCP::Option::MTU_TIMEOUT, Lib::DHCP::Option::NAME, Lib::DHCP::Option::NAME_SERVER, Lib::DHCP::Option::NBDD, Lib::DHCP::Option::NBNS, Lib::DHCP::Option::NETBIOS_TCP_IP, Lib::DHCP::Option::NETBIOS_TCP_SCOPE, Lib::DHCP::Option::NIS_DOMAIN, Lib::DHCP::Option::NIS_DOMAIN_NAME, Lib::DHCP::Option::NIS_SERVER, Lib::DHCP::Option::NIS_SERVERS, Lib::DHCP::Option::NIS_TIME_SERVER, Lib::DHCP::Option::NNTP_SERVER, Lib::DHCP::Option::OPTION_OVERLOAD, Lib::DHCP::Option::PAD, Lib::DHCP::Option::PARAMETER_REQUEST, Lib::DHCP::Option::POLICY_FILTER, Lib::DHCP::Option::POP3_SERVER, Lib::DHCP::Option::PRIVATE, Lib::DHCP::Option::QUOTE_SERVER, Lib::DHCP::Option::REBIND_TIME, Lib::DHCP::Option::RELAY_AGENT, Lib::DHCP::Option::RENEW_TIME, Lib::DHCP::Option::REQUESTED_ADDRESS, Lib::DHCP::Option::RES_SERVER, Lib::DHCP::Option::ROOT_PATH, Lib::DHCP::Option::ROUTER, Lib::DHCP::Option::ROUTER_SOLICIT, Lib::DHCP::Option::SERVER_IDENTIFIER, Lib::DHCP::Option::SMTP_SERVER, Lib::DHCP::Option::SRC_ROUTE, Lib::DHCP::Option::STATIC_ROUTE, Lib::DHCP::Option::STREET_TALK_DIRECTORY_SERVER, Lib::DHCP::Option::STREET_TALK_SERVER, Lib::DHCP::Option::SUBNET_MASK, Lib::DHCP::Option::SWAP_SERVER, Lib::DHCP::Option::TCP_ALIVE_GARBAGE, Lib::DHCP::Option::TCP_KEEP_ALIVE, Lib::DHCP::Option::TCP_TTL, Lib::DHCP::Option::TFTP_SERVER, Lib::DHCP::Option::TIME_OFFSET, Lib::DHCP::Option::TIME_SERVER, Lib::DHCP::Option::TRAILER_ENCAPSULATION, Lib::DHCP::Option::USER_CLASS, Lib::DHCP::Option::VENDOR_CLASS_IDENTIFIER, Lib::DHCP::Option::VENDOR_SPECIFIC, Lib::DHCP::Option::WWW_SERVER, Lib::DHCP::Option::XDISPLAY_MANAGER, Lib::DHCP::Option::XFONT

Instance Attribute Summary collapse

Attributes inherited from Lib::DHCP::Option

#oid, #payload

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Lib::DHCP::Option

#<=>, #to_s

Constructor Details

#initialize(tsp_server_address) ⇒ Option3

Returns a new instance of Option3.



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# File 'lib/lib/dhcp/options/option122.rb', line 113

def initialize(tsp_server_address)
  @oid = 3

  case tsp_server_address
    when Net::Address::IPv4
      @type = 1
      @payload = tsp_server_address
    when String
      begin
        @payload = Net::Address::IPv4.new(tsp_server_address)
        @type = 1
      rescue ArgumentError
        @type = 0
        @payload = tsp_server_address
      end
    else
      raise ArgumentError, 'Unknown TSP Provisioning Server Address type'
  end
end

Instance Attribute Details

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/lib/dhcp/options/option122.rb', line 111

def type
  @type
end

Class Method Details

.unpack(oid, len, payload) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/lib/dhcp/options/option122.rb', line 157

def self.unpack(oid, len, payload)
  raise ArgumentError, "OID mismatch, require 3, #{oid} given" unless oid == 3
  type = payload.unpack('C').first.to_i
  if type == 1
    raise ArgumentError, "Wrong TSP's Provisioning Server Address Sub-Option length for type 1. Should by 5 but #{len} given" unless len == 5
    self.new Net::Address::IPv4.new(payload.unpack('@N').first)
  elsif type == 0
    self.new payload.unpack('@a*').first
  else
    raise ArgumentError, "Unknown TSP's Provisioning Server Address Sub-Option type #{type}"
  end
end

Instance Method Details

#len ⇒ Object 



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# File 'lib/lib/dhcp/options/option122.rb', line 137

def len
  if type == 1
    5
  else
    @payload.to_s.split('.').map{|label| [label.length, label.unpack('C*')]}.flatten.size + 2
    #@payload.size + 1
  end
end

#name ⇒ Object 



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# File 'lib/lib/dhcp/options/option122.rb', line 133

def name
  "TSP's Provisioning Server Address Sub-Option"
end

#pack ⇒ Object 



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# File 'lib/lib/dhcp/options/option122.rb', line 146

def pack
  if @type == 1
    [@oid.to_i, self.len.to_i, 1, @payload.to_i].pack('C3N')
  elsif @type == 0
    fqdn_encode = @payload.to_s.split('.').map{|label| [label.length, label.unpack('C*')]}.flatten
    [@oid.to_i, fqdn_encode.size + 2, 0, *fqdn_encode,0].pack('C*')
  else
    raise ArgumentError, 'Unknown TSP Provisioning Server Address type'
  end
end