Class: Scriptroute::ICMPecho

Inherits:
ICMP show all
Defined in:
lib/scriptroute/packets.rb

Overview

Class for ping packets (echo and echo reply)

Constant Summary

Constants inherited from ICMP

Scriptroute::ICMP::ICMP_ECHO, Scriptroute::ICMP::ICMP_ECHOREPLY, Scriptroute::ICMP::ICMP_MASKREPLY, Scriptroute::ICMP::ICMP_MASKREQ, Scriptroute::ICMP::ICMP_PARAMETERPROB, Scriptroute::ICMP::ICMP_TIMESTAMP, Scriptroute::ICMP::ICMP_TIMESTAMPREPLY, Scriptroute::ICMP::ICMP_TIMXCEED, Scriptroute::ICMP::ICMP_UNREACH, Scriptroute::ICMP::ICMP_UNREACH_FILTER_PROHIB, Scriptroute::ICMP::ICMP_UNREACH_HOST, Scriptroute::ICMP::ICMP_UNREACH_HOST_PRECEDENCE, Scriptroute::ICMP::ICMP_UNREACH_HOST_PROHIB, Scriptroute::ICMP::ICMP_UNREACH_HOST_UNKNOWN, Scriptroute::ICMP::ICMP_UNREACH_ISOLATED, Scriptroute::ICMP::ICMP_UNREACH_NEEDFRAG, Scriptroute::ICMP::ICMP_UNREACH_NET, Scriptroute::ICMP::ICMP_UNREACH_NET_PROHIB, Scriptroute::ICMP::ICMP_UNREACH_NET_UNKNOWN, Scriptroute::ICMP::ICMP_UNREACH_PORT, Scriptroute::ICMP::ICMP_UNREACH_PRECEDENCE_CUTOFF, Scriptroute::ICMP::ICMP_UNREACH_PROTOCOL, Scriptroute::ICMP::ICMP_UNREACH_SRCFAIL, Scriptroute::ICMP::ICMP_UNREACH_TOSHOST, Scriptroute::ICMP::ICMP_UNREACH_TOSNET

Constants inherited from IPv4

Scriptroute::IPv4::IPPROTO_ICMP

Constants inherited from IP

Scriptroute::IP::IPPROTO_TCP, Scriptroute::IP::IPPROTO_UDP

Instance Attribute Summary collapse

Attributes inherited from ICMP

#icmp_cksum, #icmp_code, #icmp_type, #ip_p, #ip_payload_len

Attributes inherited from IPv4

#ip_dst, #ip_hl, #ip_id, #ip_len, #ip_off, #ip_options, #ip_p, #ip_src, #ip_sum, #ip_tos, #ip_ttl, #ip_v

Instance Method Summary collapse

Methods inherited from IPv4

#add_option, #calculate_header_len, #calculate_packet_len, creator, #ip_payload_len, #ipv4_unmarshal

Methods inherited from IP

creator, #to_bytes

Constructor Details

#initialize(paylen_or_str = 0) ⇒ ICMPecho

Returns a new instance of ICMPecho.



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# File 'lib/scriptroute/packets.rb', line 714

def initialize(paylen_or_str = 0)
  if(paylen_or_str.is_a?(Fixnum)) then
    if( paylen_or_str < 0) then raise "payload length must be >= 0" end
    @ip_payload_len = paylen_or_str + 4 + 4
    @icmp_id = 666
    @icmp_seq = 1
    super(ICMP_ECHO)
  else
    # x is skip forward a character.
    @ip_payload_len = paylen_or_str.length - 8
    @icmp_id, @icmp_seq = paylen_or_str.unpack("xxxxnn")
    super(paylen_or_str)
  end
end

Instance Attribute Details

#icmp_id ⇒ Fixnum (readonly)

Returns:

  • (Fixnum) 


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# File 'lib/scriptroute/packets.rb', line 708

def icmp_id
  @icmp_id
end

#icmp_seq ⇒ Fixnum

Returns:

  • (Fixnum) 


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# File 'lib/scriptroute/packets.rb', line 708

def icmp_seq
  @icmp_seq
end

Instance Method Details

#marshal ⇒ String

Returns The packet in string form.

Returns:

  • (String) —

    The packet in string form



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# File 'lib/scriptroute/packets.rb', line 729

def marshal
  super + [ @icmp_id, @icmp_seq ].pack("nn") + "\0" * ( @ip_payload_len - 4 - 4 )
end

#to_s ⇒ String

Returns:

  • (String) 


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# File 'lib/scriptroute/packets.rb', line 733

def to_s
  super + ": ECHO: id %d seq %d len %d" % [ @icmp_id, @icmp_seq, @ip_payload_len ] 
end