org.jvnet.hudson.proxy_dhcp
Class DHCPPacket

java.lang.Object
  org.jvnet.hudson.proxy_dhcp.DHCPPacket

public class DHCPPacket
extends java.lang.Object

Represents a DHCP packet.

Author:

Kohsuke Kawaguchi

See Also:

2131 (http://www.ietf.org/rfc/rfc2131.txt)

Field Summary

byte[]	chaddr
java.net.Inet4Address	ciaddr
java.lang.String	file
short	flags
java.net.Inet4Address	giaddr
byte	hlen
byte	hops
byte	htype
byte	op
static byte	OP_BOOTREPLY
static byte	OP_BOOTREQUEST
java.util.List<DHCPOption>	options
short	secs
java.net.Inet4Address	siaddr
java.lang.String	sname
int	xid
java.net.Inet4Address	yiaddr

Constructor Summary

DHCPPacket()
Creates an empty packet.

DHCPPacket(java.net.DatagramPacket p)
Populates a packet from DatagramPacket.

Method Summary

DHCPPacket	createResponse()
DHCPOption	getOption(byte tag) Finds a DHCP option of the given tag
java.lang.String	getVendorClassIdentifier()
boolean	is(DHCPMessageType type) Is this a DHCP message of the given type.
java.net.DatagramPacket	pack() Package a packet into DatagramPacket

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

op

public byte op

htype

public byte htype

hlen

public byte hlen

hops

public byte hops

xid

public int xid

secs

public short secs

flags

public short flags

ciaddr

public java.net.Inet4Address ciaddr

yiaddr

public java.net.Inet4Address yiaddr

siaddr

public java.net.Inet4Address siaddr

giaddr

public java.net.Inet4Address giaddr

chaddr

public byte[] chaddr

sname

public java.lang.String sname

file

public java.lang.String file

options

public java.util.List<DHCPOption> options

OP_BOOTREQUEST

public static final byte OP_BOOTREQUEST

See Also:

Constant Field Values

OP_BOOTREPLY

public static final byte OP_BOOTREPLY

See Also:

Constant Field Values

Constructor Detail

DHCPPacket

public DHCPPacket()

Creates an empty packet.

DHCPPacket

public DHCPPacket(java.net.DatagramPacket p)
           throws java.io.IOException

Populates a packet from DatagramPacket.

Throws:

java.lang.IllegalArgumentException - If the packet is not a DHCP packet.

java.io.IOException

Method Detail

getOption

public DHCPOption getOption(byte tag)

Finds a DHCP option of the given tag

is

public boolean is(DHCPMessageType type)

Is this a DHCP message of the given type.

getVendorClassIdentifier

public java.lang.String getVendorClassIdentifier()

createResponse

public DHCPPacket createResponse()

pack

public java.net.DatagramPacket pack()
                             throws java.io.IOException

Package a packet into DatagramPacket

Throws:

java.io.IOException