Class: OSPFv2::LinkStateUpdate

Inherits:
OspfPacket show all
Defined in:
lib/packet/link_state_update.rb

Constant Summary

Constants inherited from OspfPacket

OspfPacket::DATABASE_DESCRIPTION, OspfPacket::HELLO, OspfPacket::LINK_STATE_ACKNOWLEDGMENT, OspfPacket::LINK_STATE_REQUEST, OspfPacket::LINK_STATE_UPDATE

Constants included from OSPFv2

ASBR_SUMMMARY_LSA, AllDRouters, AllSPFRouters, AreaId, CheckAge, DefaultDestination, EXTERNAL_BASE_ADDRESS, EXTERNAL_LSA, IPPROTO_OSPF, InitialSequenceNumber, LINK_BASE_ADDRESS, LSA_HEADER_LEN, LSInfinity, LSRefreshTime, MaxAge, MaxAgeDiff, MaxSequenceNumber, MinLSArrival, MinLSInterval, N, NETWORK_BASE_ADDRESS, NETWORK_LSA, NSSA_LSA, Netmask, PACKET_HEADER_LEN, ROUTER_LINK_P2P, ROUTER_LINK_STUB, ROUTER_LINK_TRANSIT, ROUTER_LINK_VL, ROUTER_LSA, RouterId, SUMMARY_BASE_ADDRESS, SUMMARY_LSA, VERSION

Instance Attribute Summary collapse

Attributes inherited from OspfPacket

#area_id, #au_type, #ospf_version, #packet_type, #router_id, #version

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from OspfPacket

factory, #method_missing, #packet_name, #to_hash, #to_s_brief, #to_s_default

Methods included from Common

#ivar_to_klassname, #ivars, #set, #to_hash

Constructor Details

#initialize(_arg = {}) ⇒ LinkStateUpdate

Returns a new instance of LinkStateUpdate.



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# File 'lib/packet/link_state_update.rb', line 87

def initialize(_arg={})
  arg = _arg.dup
  @lsas=[]
  if arg.is_a?(Hash)
    arg.merge!({:packet_type=>4})
    super arg
  elsif arg.is_a?(String)
    parse arg
  elsif arg.is_a?(self)
    parse arg.encode
  else
    raise ArgumentError, "Invalid argument", caller
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class OSPFv2::OspfPacket

Instance Attribute Details

#lsas ⇒ Object (readonly)

Returns the value of attribute lsas.



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# File 'lib/packet/link_state_update.rb', line 85

def lsas
  @lsas
end

Class Method Details

.new_lsas(arg = {}) ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 164

def new_lsas(arg={})
  lsus=[]
  len=0
  lsas = arg[:lsas]
  arg.delete(:lsas)
  lsu = new(arg)
  [lsas].flatten.compact.each do |lsa|
    lsa_len = lsa.encode.size
    if (len + lsa_len) > (1476-56-20)
      lsus << lsu
      lsu = new(arg)
      len = 0
    end
    lsu.lsas << lsa
    len += lsa_len
  end
  lsus << lsu
  lsus
end

Instance Method Details

#[](val) ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 127

def [](val)
  lsas[val] 
end

#ack_lsu(router_id) ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 156

def ack_lsu(router_id)
  ls_ack = LinkStateAck.new(:router_id => router_id, :area => area = @aread_id)
  each { |lsa| ls_ack.lsa_headers << lsa  }
  ls_ack
end

#each ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 148

def each
  lsas.each { |ls| yield ls }
end

#encode ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 106

def encode
  headers = []
  headers << [lsas.size].pack('N')
  headers << lsas.collect { |x| x.encode }.join
  super headers.join
end

#keys ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 152

def keys
  lsas.collect { |ls| ls.key }
end

#number_of_lsa ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 102

def number_of_lsa
  lsas.size
end

#parse(s) ⇒ Object 



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# File 'lib/packet/link_state_update.rb', line 113

def parse(s)
  n, lsas = super(s).unpack('Na*')
  while lsas.size>0
    len = lsas[18..19].unpack('n')[0]
    lsa = lsas.slice!(0,len)
    lsa = Lsa.factory lsa
    if lsa
      @lsas << lsa
    else
      puts "COULD NOT BUILD LSA OUT OF #{lsa.unpack('H*')}"
    end
  end
end

#to_s ⇒ Object

def to_s

s = []
s << super
s << lsas.collect { |x| x.to_s_junos }.join("\n ")
s.join("\n ")

end



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# File 'lib/packet/link_state_update.rb', line 138

def to_s
  s = []
  s << super(:brief)
  s << "\# LSAs #{@lsas.size}"
  s << "Age  Options  Type    Link-State ID   Advr Router     Sequence   Checksum  Length"
  s << @lsas.collect { |x| x.to_s }.join("\n ")
  s.join("\n ")
end