Package google.registry.dns.writer.dnsupdate

Class DnsMessageTransport

java.lang.Object

google.registry.dns.writer.dnsupdate.DnsMessageTransport

public class DnsMessageTransport
extends Object

A transport for DNS messages. Sends/receives DNS messages over TCP using old-style Socket s and the message framing defined in RFC 1035. We would like use the dnsjava library's SimpleResolver class for this, but it requires SocketChannel which is not supported on AppEngine.

Constructor Summary

Constructors

Constructor	Description
DnsMessageTransport(SocketFactory factory, String updateHost, org.joda.time.Duration updateTimeout)	Class constructor.

Method Summary

Modifier and Type	Method	Description
org.xbill.DNS.Message	send(org.xbill.DNS.Message query)	Sends a DNS "query" message (most likely an UPDATE) and returns the response.

Methods inherited from class java.lang.Object

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

Constructor Details

DnsMessageTransport

@Inject
public DnsMessageTransport(SocketFactory factory,
 @Config("dnsUpdateHost")
 String updateHost,
 @Config("dnsUpdateTimeout")
 org.joda.time.Duration updateTimeout)

Class constructor.

Parameters:

factory - a factory for TCP sockets

updateHost - host name of the DNS server

updateTimeout - update I/O timeout

Method Details

send

public org.xbill.DNS.Message send(org.xbill.DNS.Message query)
                           throws IOException

Sends a DNS "query" message (most likely an UPDATE) and returns the response. The response is checked for matching ID and opcode.

Parameters:

query - a message to send

Returns:

the response received from the server

Throws:

IOException - if the Socket input/output streams throws one

IllegalArgumentException - if the query is too large to be sent (> 65535 bytes)