simnet
Class IPFilter

java.lang.Object
  simnet.IPFilter

Direct Known Subclasses:

SimpleFilter

public abstract class IPFilter

extends java.lang.Object

Maintain a set of Rules and BPF Filters for a link.

Field Summary

int	id Filter ID

Constructor Summary

IPFilter()

Method Summary

abstract void	addBPF(BPF bpf) Adds the specified BPF rule to this IPFilter.
abstract void	addRule(int rule_id, int action, int protocol, int src_id, int dest_id, int dest_port) Adds a firewall rule matching the specified criterias to this IPFilter.
abstract void	addRule(Rule rule) Adds the specified firewall rule to this IPFilter.
protected void	finalize() For debugging
abstract boolean	in(IP_Packet ipp) Processes incoming IP packets from the IP stack This is an abstract class that must be implemented by every IPFilter.
abstract void	initialize(int filter_id) Initializes a new IPFilter by setting its ID.
abstract void	removeBPF(BPF bpf) Removes the specified BPF rule from this IPFilter.
abstract void	removeRule(int rid) Removes the firewall rule with the specified ID from this IPFilter.

Methods inherited from class java.lang.Object

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

Field Detail

id

public int id

Filter ID

Constructor Detail

IPFilter

public IPFilter()

Method Detail

initialize

public abstract void initialize(int filter_id)

Initializes a new IPFilter by setting its ID. This is an abstract class that must be implemented by every IPFilter.

Parameters:

filter_id - the filter' s ID

in

public abstract boolean in(IP_Packet ipp)

Processes incoming IP packets from the IP stack This is an abstract class that must be implemented by every IPFilter.

Parameters:

ipp - incoming data

addRule

public abstract void addRule(Rule rule)

Adds the specified firewall rule to this IPFilter. This is an abstract class that must be implemented by every IPFilter.

Parameters:

rule - the firewall rule to add

addRule

public abstract void addRule(int rule_id,
                             int action,
                             int protocol,
                             int src_id,
                             int dest_id,
                             int dest_port)

Adds a firewall rule matching the specified criterias to this IPFilter. This is an abstract class that must be implemented by every IPFilter.

Parameters:

rule_id - the ID of the firewall rule to add

action - the action to take on a matching packet. Either Simnet.DENY or Simnet.ALLOW

protocol - the protocol to match

src_id - the source ID to match

dest_id - the destination ID to match

dest_port - the destination port to match

removeRule

public abstract void removeRule(int rid)

Removes the firewall rule with the specified ID from this IPFilter. This is an abstract class that must be implemented by every IPFilter.

Parameters:

rid - ID of the firewall rulee to add

addBPF

public abstract void addBPF(BPF bpf)

Adds the specified BPF rule to this IPFilter. This is an abstract class that must be implemented by every IPFilter.

Parameters:

bpf - the bpf rule to add

removeBPF

public abstract void removeBPF(BPF bpf)

Removes the specified BPF rule from this IPFilter. This is an abstract class that must be implemented by every IPFilter.

Parameters:

bpf - the bpf rule to add

finalize

protected void finalize()

For debugging