Package org.minidns

Class DnsClient

java.lang.Object

org.minidns.AbstractDnsClient

org.minidns.DnsClient

public class DnsClient
extends AbstractDnsClient

A minimal DNS client for SRV/A/AAAA/NS and CNAME lookups, with IDN support. This circumvents the missing javax.naming package on android.

Nested Class Summary

Nested classes/interfaces inherited from class org.minidns.AbstractDnsClient

AbstractDnsClient.IpVersionSetting

Field Summary

Fields inherited from class org.minidns.AbstractDnsClient

cache, dataSource, DEFAULT_CACHE, DEFAULT_IP_VERSION_SETTING, insecureRandom, ipVersionSetting, LOGGER, random

Constructor Summary

Constructors

Constructor	Description
DnsClient()	Create a new DNS client using the global default cache.
DnsClient(DnsCache dnsCache)

Method Summary

Modifier and Type	Method	Description
static boolean	addBlacklistedDnsServer(String dnsServer)
static void	addDnsServerLookupMechanism(DnsServerLookupMechanism dnsServerLookup)
static List<String>	findDNS()	Retrieve a list of currently configured DNS servers IP addresses.
static List<InetAddress>	findDnsAddresses()	Retrieve a list of currently configured DNS server addresses.
InetAddress	getRandomHarcodedIpv6DnsServer()
InetAddress	getRandomHardcodedIpv4DnsServer()
static Question	getReverseIpLookupQuestionFor(Inet4Address inet4Address)
static Question	getReverseIpLookupQuestionFor(Inet6Address inet6Address)
static Question	getReverseIpLookupQuestionFor(InetAddress inetAddress)
boolean	isAskForDnssec()
boolean	isDisableResultFilter()
boolean	isUseHardcodedDnsServersEnabled()
protected DnsMessage.Builder	newQuestion(DnsMessage.Builder message)
DnsQueryResult	query(DnsMessage.Builder queryBuilder)	Send a query request to the DNS system.
protected MiniDnsFuture<DnsQueryResult,IOException>	queryAsync(DnsMessage.Builder queryBuilder)	Default implementation of an asynchronous DNS query which just wraps the synchronous case.
static boolean	removeBlacklistedDnsServer(String dnsServer)
static boolean	removeDNSServerLookupMechanism(DnsServerLookupMechanism dnsServerLookup)
void	setAskForDnssec(boolean askForDnssec)
void	setDisableResultFilter(boolean disableResultFilter)
void	setUseHardcodedDnsServers(boolean useHardcodedDnsServers)

Methods inherited from class org.minidns.AbstractDnsClient

getCache, getCachedIPv4AddressesFor, getCachedIPv4NameserverAddressesFor, getCachedIPv6AddressesFor, getCachedIPv6NameserverAddressesFor, getCachedNameserverRecordsFor, getDataSource, getPreferedIpVersion, getQueryFor, isResponseCacheable, query, query, query, query, query, query, query, query, query, query, query, queryAsync, queryAsync, queryAsync, queryAsync, setDataSource, setDefaultIpVersion, setPreferedIpVersion

Methods inherited from class java.lang.Object

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

Constructor Details

DnsClient

public DnsClient()

Create a new DNS client using the global default cache.

DnsClient

public DnsClient(DnsCache dnsCache)

Method Details

newQuestion

protected DnsMessage.Builder newQuestion(DnsMessage.Builder message)

Specified by:

newQuestion in class AbstractDnsClient

query

public DnsQueryResult query(DnsMessage.Builder queryBuilder)
                     throws IOException

Description copied from class: AbstractDnsClient

Send a query request to the DNS system.

Specified by:

query in class AbstractDnsClient

Parameters:

queryBuilder - The query to send to the server.

Returns:

The response (or null).

Throws:

IOException - if an IO error occurs.

queryAsync

protected MiniDnsFuture<DnsQueryResult,IOException> queryAsync(DnsMessage.Builder queryBuilder)

Description copied from class: AbstractDnsClient

Default implementation of an asynchronous DNS query which just wraps the synchronous case.

Subclasses override this method to support true asynchronous queries.

Overrides:

queryAsync in class AbstractDnsClient

Parameters:

queryBuilder - the query.

Returns:

a future for this query.

findDNS

public static List<String> findDNS()

Retrieve a list of currently configured DNS servers IP addresses. This method does verify that only IP addresses are returned and nothing else (e.g. DNS names).

The addresses are discovered by using one (or more) of the configured DnsServerLookupMechanisms.

Returns:

A list of DNS server IP addresses configured for this system.

findDnsAddresses

public static List<InetAddress> findDnsAddresses()

Retrieve a list of currently configured DNS server addresses.

Note that unlike findDNS(), the list returned by this method will take the IP version setting into account, and order the list by the preferred address types (IPv4/v6). The returned list is modifiable.

Returns:

A list of DNS server addresses.

See Also:

• findDNS()

addDnsServerLookupMechanism

public static void addDnsServerLookupMechanism(DnsServerLookupMechanism dnsServerLookup)

removeDNSServerLookupMechanism

public static boolean removeDNSServerLookupMechanism(DnsServerLookupMechanism dnsServerLookup)

addBlacklistedDnsServer

public static boolean addBlacklistedDnsServer(String dnsServer)

removeBlacklistedDnsServer

public static boolean removeBlacklistedDnsServer(String dnsServer)

isAskForDnssec

public boolean isAskForDnssec()

setAskForDnssec

public void setAskForDnssec(boolean askForDnssec)

isDisableResultFilter

public boolean isDisableResultFilter()

setDisableResultFilter

public void setDisableResultFilter(boolean disableResultFilter)

isUseHardcodedDnsServersEnabled

public boolean isUseHardcodedDnsServersEnabled()

setUseHardcodedDnsServers

public void setUseHardcodedDnsServers(boolean useHardcodedDnsServers)

getRandomHardcodedIpv4DnsServer

public InetAddress getRandomHardcodedIpv4DnsServer()

getRandomHarcodedIpv6DnsServer

public InetAddress getRandomHarcodedIpv6DnsServer()

getReverseIpLookupQuestionFor

public static Question getReverseIpLookupQuestionFor(Inet4Address inet4Address)

getReverseIpLookupQuestionFor

public static Question getReverseIpLookupQuestionFor(Inet6Address inet6Address)

getReverseIpLookupQuestionFor

public static Question getReverseIpLookupQuestionFor(InetAddress inetAddress)