DNS
Class ZoneData

java.lang.Object
  DNS.ZoneData

public class ZoneData

extends java.lang.Object

Data structure that holds information about zones. In particular, holds a list of RRGroups which hold ResourceRecords. RRGroups are stored in Canonical Order (see RFC 2673).

Field Summary

java.util.HashSet	authoritativeRRGroups List of all names we are authoritative for, as defined by the AUTH keywods in the .dns file.
java.util.LinkedList	names List of RRGroups stored in canonical order.
java.lang.String	zone The zone this ZoneData object applies to.

Constructor Summary

ZoneData(java.lang.String zone)
Constructor that specifies the zone and initializes the List for RRGroups.

Method Summary

void	addRR(java.lang.String name, ResourceRecord rr, boolean authoratativeKnowledge) Add a Resource Record to our database by finding the correct RRGroup and adding it to that group.
void	addRRGroup(java.lang.String name, boolean authoritativeKnowledge) Create and add an RRGroup that is defined by a certain name.
void	adjustSIGRecords()
boolean	authoritativeFor(java.lang.String name) Returns whether or not we are authoritative for this name.
int	getCannonicalIndex(java.lang.String name) Computes the Cannonical index of an RRGroup in our list of RRGroups.
RRGroup	getRRGroup(java.lang.String name) Method to retrieve an RRGroup with a certain name.
RRGroup	getRRGroup(java.lang.String type, java.lang.String name) Return the RRGropu that has a certain name and a Resource Record of a given type.
java.util.LinkedList	getRRGroups(java.lang.String type) Search for all RRGroups that have contain a ResourceRecord of a specified type.
boolean	isCannonicallyBefore(java.lang.String first, java.lang.String second) Determines if a record's name should come before another's according to Cannonical Ordering.
java.lang.String	toString() Standard toString method -- prints out each RRGroup (which prints out each RR)
void	updateDurations(long time)

Methods inherited from class java.lang.Object

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

Field Detail

names

public java.util.LinkedList names

List of RRGroups stored in canonical order.

zone

public java.lang.String zone

The zone this ZoneData object applies to.

authoritativeRRGroups

public java.util.HashSet authoritativeRRGroups

List of all names we are authoritative for, as defined by the AUTH keywods in the .dns file.

Constructor Detail

ZoneData

public ZoneData(java.lang.String zone)

Constructor that specifies the zone and initializes the List for RRGroups.

Parameters:

zone - The name of this zone

Method Detail

authoritativeFor

public boolean authoritativeFor(java.lang.String name)

Returns whether or not we are authoritative for this name. This is determined by our hashset, as specified in the dns file we read on init (AUTH).

addRRGroup

public void addRRGroup(java.lang.String name,
                       boolean authoritativeKnowledge)

Create and add an RRGroup that is defined by a certain name.

Parameters:

name - The name of the RRGroup to add.

getRRGroups

public java.util.LinkedList getRRGroups(java.lang.String type)

Search for all RRGroups that have contain a ResourceRecord of a specified type. Useful for extracting all of our Name Servers

Parameters:

type - The type of record the RRGroup must have.

getRRGroup

public RRGroup getRRGroup(java.lang.String type,
                          java.lang.String name)

Return the RRGropu that has a certain name and a Resource Record of a given type.

Parameters:

type - The type of the RR that the returned RRGroup must contain

name - The name of the RRGroup tha is returned.

Returns:

An RRGroup that has the name name and an RR of type type. Null if no such RRGroup exists.

getRRGroup

public RRGroup getRRGroup(java.lang.String name)

Method to retrieve an RRGroup with a certain name.

Parameters:

name - The name the RRGroup should have

Returns:

The given RRGroup, null if it does not exist.

getCannonicalIndex

public int getCannonicalIndex(java.lang.String name)

Computes the Cannonical index of an RRGroup in our list of RRGroups.

Parameters:

name - The name of the RRGroup.

Returns:

The index this RRGroup should be placed at within our list.

isCannonicallyBefore

public boolean isCannonicallyBefore(java.lang.String first,
                                    java.lang.String second)

Determines if a record's name should come before another's according to Cannonical Ordering. See draft-ietf-dnsext-dnssec-records-05 for definition of Cannonical Ordering.

Parameters:

first - the name of the frist RRGroup we are checking

second - the name of the second RRGroup we are checking

Returns:

whether or not first is cannonically before second

addRR

public void addRR(java.lang.String name,
                  ResourceRecord rr,
                  boolean authoratativeKnowledge)

Add a Resource Record to our database by finding the correct RRGroup and adding it to that group. If that group does not exist, create it.

Parameters:

name - The name of the RR

rr - The actual RR.

adjustSIGRecords

public void adjustSIGRecords()

updateDurations

public void updateDurations(long time)

toString

public java.lang.String toString()

Standard toString method -- prints out each RRGroup (which prints out each RR)