public final class Dns
extends java.lang.Object
Example Usage:
// create new instance Dns dns = new Dns(); // creates DNS request with nameserver and domain as arguments DnsRequest request = new DnsRequest("ns.myserver.com","myserver.com"); // retrieve only MX (mail exchanger) records request.setRecordType(Dns.TYPE_MX); // gets DNS response DnsResponse response = dns.getResponse(request); // print out records for response to console Enumeration e = response.getAnswers(); while(e.hasMoreElements()) { DnsRecord record = (DnsRecord) e.nextElement(); System.out.println(record); }
Modifier and Type | Field and Description |
---|---|
static int |
CLASS_ANY
Indicates any Domain Records.
|
static int |
CLASS_CH
Indicates CHAOS domain records.
|
static int |
CLASS_CS
Indicates CSNET domain records.
|
static int |
CLASS_HS
Indicates HESIOD domain records.
|
static int |
CLASS_IN
Indicates Internet domain records.
|
static int |
DEFAULT_PORT
Default Dns port.
|
static int |
OPCODE_IQUERY
Indicates an Internet Query operation.
|
static int |
OPCODE_QUERY
Indicates a Query operation.
|
static int |
OPCODE_STATUS
Indicates a Status Query operation.
|
static int |
SHIFT_AUTHORITATIVE
Indicates that response is an authoritative answer.
|
static int |
SHIFT_OPCODE |
static int |
SHIFT_QUERY |
static int |
SHIFT_RECURSE_AVAILABLE
Indicates that recursion is available.
|
static int |
SHIFT_RECURSE_PLEASE
Indicates that recursion is requested.
|
static int |
SHIFT_RESERVED |
static int |
SHIFT_RESPONSE_CODE
Indicates that no error occured in query.
|
static int |
SHIFT_TRUNCATED
Indicates that response is truncated.
|
static int |
TYPE_A
Indicates a host address record.
|
static int |
TYPE_ANY
Indicates Any record.
|
static int |
TYPE_AXFR
Indicates a request for zone transfer record.
|
static int |
TYPE_CNAME
Indicates a canonical name for an alias record.
|
static int |
TYPE_HINFO
Indicates a host information record.
|
static int |
TYPE_IXFR
Indicates a request for incremental zone transfer record.
|
static int |
TYPE_MAILA
Indicates a request for mail agent record.
|
static int |
TYPE_MAILB
Indicates a request for mailbox-related records record.
|
static int |
TYPE_MB
Indicates a mailbox domain record.
|
static int |
TYPE_MD
Indicates a mail destination record.
|
static int |
TYPE_MF
Indicates a mail forwarder record.
|
static int |
TYPE_MG
Indicates a mail group member record.
|
static int |
TYPE_MINFO
Indicates a mailbox or list information record.
|
static int |
TYPE_MR
Indicates a mail rename domain name record.
|
static int |
TYPE_MX
Indicates a mail exchange record.
|
static int |
TYPE_NS
Indicates an authoritative name server record.
|
static int |
TYPE_NULL
Indicates a null record.
|
static int |
TYPE_PTR
Indicates a domain name pointer record.
|
static int |
TYPE_SOA
Indicates a start of authority record.
|
static int |
TYPE_TXT
Indicates a text record.
|
static int |
TYPE_WKS
Indicates a well known service description record.
|
Constructor and Description |
---|
Dns()
Constructs a new
Dns instance. |
Modifier and Type | Method and Description |
---|---|
void |
clearProxySettings()
Clears proxy server values.
|
DnsResponse |
getResponse(DnsRequest request)
Gets response from a DNS server based on arguments defined in
request . |
DnsResponse |
getResponse(DnsRequest request,
boolean ignoreLength)
Gets response from a DNS server based on arguments defined in
request . |
void |
setProxyAuthentication(java.lang.String proxyUsername,
java.lang.String proxyPassword)
Sets the username and password to use when for authentication with
proxy server.
|
void |
setProxyHost(java.lang.String proxyHostname,
int proxyPort)
Sets the proxy hostname and port for this connection.
|
void |
setProxyType(java.lang.String proxyType)
Sets the proxy type will be used for this connection.
|
static java.lang.Class |
typeName(int type)
Gets descriptive name for a given Dns record
type . |
public static final int DEFAULT_PORT
public static final int TYPE_A
public static final int TYPE_NS
public static final int TYPE_MD
Dns.TYPE_MX
.public static final int TYPE_MF
Dns.TYPE_MX
.public static final int TYPE_CNAME
public static final int TYPE_SOA
public static final int TYPE_MB
public static final int TYPE_MG
public static final int TYPE_MR
public static final int TYPE_NULL
public static final int TYPE_WKS
public static final int TYPE_PTR
public static final int TYPE_HINFO
public static final int TYPE_MINFO
public static final int TYPE_MX
public static final int TYPE_TXT
public static final int TYPE_IXFR
public static final int TYPE_AXFR
public static final int TYPE_MAILB
public static final int TYPE_MAILA
Dns.TYPE_MX
.public static final int TYPE_ANY
public static final int CLASS_IN
public static final int CLASS_CS
public static final int CLASS_CH
public static final int CLASS_HS
public static final int CLASS_ANY
public static final int SHIFT_QUERY
public static final int SHIFT_OPCODE
public static final int SHIFT_AUTHORITATIVE
public static final int SHIFT_TRUNCATED
public static final int SHIFT_RECURSE_PLEASE
public static final int SHIFT_RECURSE_AVAILABLE
public static final int SHIFT_RESERVED
public static final int SHIFT_RESPONSE_CODE
public static final int OPCODE_QUERY
public static final int OPCODE_IQUERY
public static final int OPCODE_STATUS
public static java.lang.Class typeName(int type)
type
.type
- a DNS record typeDnsRecord
DnsRecord
public void setProxyAuthentication(java.lang.String proxyUsername, java.lang.String proxyPassword)
#clearProxySettings
method.proxyUsername
- the proxy usernameproxyPassword
- the proxy passwordclearProxySettings()
public void setProxyHost(java.lang.String proxyHostname, int proxyPort)
#clearProxySettings
method.proxyHostname
- the hostname or ip address of the proxy serverproxyPort
- the port of the proxy serverclearProxySettings()
public void setProxyType(java.lang.String proxyType)
proxyType
- The proxy type. Valid values: HTTP, SOCKS5public void clearProxySettings()
public DnsResponse getResponse(DnsRequest request, boolean ignoreLength) throws DnsException
request
.request
- a DnsRequest
ignoreLength
- true
if length field of DnsResponse should be ignored and read until EOF, false
otherwise, for performance reasons
this parameter should be set to true only when returning very large DNS responses.DnsResponse
DnsException
- if an I/O or DNS related error occursDnsResponse
,
DnsRequest
public DnsResponse getResponse(DnsRequest request) throws DnsException
request
.request
- a DnsRequest
DnsResponse
DnsException
- if an I/O or DNS related error occursDnsResponse
,
DnsRequest
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