jist.swans.net
Class NetIp

java.lang.Object
  jist.swans.net.NetIp

All Implemented Interfaces:

JistAPI.Proxiable, JistAPI.Timeless, NetInterface

public class NetIp
extends java.lang.Object
implements NetInterface

IPv4 implementation based on RFC 791. Performs protocol multiplexing, and prioritized packet queuing, but no RED or packet fragmentation.

Since:

SWANS1.0

Version:

$Id: NetIp.java,v 1.45 2004/11/03 23:53:22 barr Exp $

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

static class

NetIp.NicInfo Information about each network interface.

Nested classes/interfaces inherited from interface jist.swans.net.NetInterface

NetInterface.NetHandler

Field Summary

protected PacketLoss	incomingLoss packet loss models.
protected NetAddress	localAddr local network address.
static org.apache.log4j.Logger	log IP logger.
static byte	MAX_QUEUE_LENGTH Maximum packet queue length.
protected NetIp.NicInfo[]	nics network interfaces.
protected PacketLoss	outgoingLoss packet loss models.
protected NetInterface.NetHandler[]	protocolHandlers protocol handlers.
protected Mapper	protocolMap protocol number mapping.
protected RouteInterface	routing routing protocol.
protected NetInterface	self self-referencing proxy entity.
static int	THRESHOLD_FRAGMENT Packet fragmentation threshold.

Constructor Summary

NetIp(NetAddress addr, Mapper protocolMap, PacketLoss in, PacketLoss out)
Initialize IP implementation with given address and protocol mapping.

Method Summary

byte	addInterface(MacInterface macEntity) Add network interface with default queue.
byte	addInterface(MacInterface macEntity, MessageQueue q) Add network interface.
NetAddress	getAddress() Return local network address.
private NetInterface.NetHandler	getProtocolHandler(int protocolId) Return network protocol handler.
NetInterface	getProxy() Return self-referencing proxy entity.
private boolean	isForMe(NetMessage.Ip msg) Whether packet is for local consumption.
void	pump(int interfaceId) Request next packet to send, if one exists; indicate that interface has completed processing previous request.
void	receive(Message msg, MacAddress lastHop, byte macId, boolean promisc) Receive a message from the link layer.
void	send(Message msg, NetAddress dst, short protocol, byte priority, byte ttl) Route, if necessary, and send a message (from TRANSPORT).
void	send(NetMessage.Ip msg, int interfaceId, MacAddress nextHop) Send a message along given interface (usually from ROUTING).
private void	sendIp(NetMessage.Ip msg) Send an IP packet.
void	setAddress(NetAddress addr) Set local network address.
void	setProtocolHandler(int protocolId, NetInterface.NetHandler handler) Set network protocol handler.
void	setRouting(RouteInterface routingEntity) Set routing implementation.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

log

public static final org.apache.log4j.Logger log

IP logger.

THRESHOLD_FRAGMENT

public static final int THRESHOLD_FRAGMENT

Packet fragmentation threshold.

See Also:

Constant Field Values

MAX_QUEUE_LENGTH

public static final byte MAX_QUEUE_LENGTH

Maximum packet queue length.

See Also:

Constant Field Values

self

protected NetInterface self

self-referencing proxy entity.

localAddr

protected NetAddress localAddr

local network address.

routing

protected RouteInterface routing

routing protocol.

protocolMap

protected Mapper protocolMap

protocol number mapping.

protocolHandlers

protected NetInterface.NetHandler[] protocolHandlers

protocol handlers.

nics

protected NetIp.NicInfo[] nics

network interfaces.

incomingLoss

protected PacketLoss incomingLoss

packet loss models.

outgoingLoss

protected PacketLoss outgoingLoss

packet loss models.

Constructor Detail

NetIp

public NetIp(NetAddress addr,
             Mapper protocolMap,
             PacketLoss in,
             PacketLoss out)

Initialize IP implementation with given address and protocol mapping.

Parameters:

addr - local network address

protocolMap - protocol number mapping

in - incoming packet loss model

out - outgoing packet loss model

Method Detail

getProxy

public NetInterface getProxy()

Return self-referencing proxy entity.

Returns:

self-referencing proxy entity

setAddress

public void setAddress(NetAddress addr)

Set local network address.

Parameters:

addr - local network address

isForMe

private boolean isForMe(NetMessage.Ip msg)

Whether packet is for local consumption.

Parameters:

msg - packet to inspect

Returns:

whether packet is for local consumption

setRouting

public void setRouting(RouteInterface routingEntity)

Set routing implementation.

Parameters:

routingEntity - routing entity

addInterface

public byte addInterface(MacInterface macEntity)

Add network interface with default queue.

Parameters:

macEntity - link layer entity

Returns:

network interface identifier

addInterface

public byte addInterface(MacInterface macEntity,
                         MessageQueue q)

Add network interface.

Parameters:

macEntity - link layer entity

Returns:

network interface identifier

setProtocolHandler

public void setProtocolHandler(int protocolId,
                               NetInterface.NetHandler handler)

Set network protocol handler.

Parameters:

protocolId - protocol identifier

handler - protocol handler

getProtocolHandler

private NetInterface.NetHandler getProtocolHandler(int protocolId)

Return network protocol handler.

Parameters:

protocolId - protocol identifier

Returns:

procotol handler

getAddress

public NetAddress getAddress()
                      throws JistAPI.Continuation

Return local network address.

Specified by:

getAddress in interface NetInterface

Returns:

local network address

Throws:

JistAPI.Continuation - never (blocking event)

receive

public void receive(Message msg,
                    MacAddress lastHop,
                    byte macId,
                    boolean promisc)

Receive a message from the link layer.

Specified by:

receive in interface NetInterface

Parameters:

msg - incoming network packet

lastHop - link-level source of incoming packet

macId - incoming interface

promisc - whether network interface is in promisc. mode

send

public void send(Message msg,
                 NetAddress dst,
                 short protocol,
                 byte priority,
                 byte ttl)

Route, if necessary, and send a message (from TRANSPORT).

Specified by:

send in interface NetInterface

Parameters:

msg - packet payload (usually from transport or routing layers)

dst - packet destination address

protocol - packet protocol identifier

priority - packet priority

ttl - packet time-to-live value

send

public void send(NetMessage.Ip msg,
                 int interfaceId,
                 MacAddress nextHop)

Send a message along given interface (usually from ROUTING).

Specified by:

send in interface NetInterface

Parameters:

msg - packet (usually from routing layer)

interfaceId - interface along which to send packet

nextHop - packet next hop address

sendIp

private void sendIp(NetMessage.Ip msg)

Send an IP packet. Knows how to broadcast, to deal with loopback. Will call routing for all other destinations.

Parameters:

msg - ip packet

pump

public void pump(int interfaceId)

Request next packet to send, if one exists; indicate that interface has completed processing previous request.

Specified by:

pump in interface NetInterface

Parameters:

interfaceId - interface identifier

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object