Provides the ability to send NameChangeRequests via UDP socket. More...

#include <ncr_udp.h>

Inheritance diagram for isc::dhcp_ddns::NameChangeUDPSender:

Public Member Functions
	NameChangeUDPSender (const isc::asiolink::IOAddress &ip_address, const uint32_t port, const isc::asiolink::IOAddress &server_address, const uint32_t server_port, const NameChangeFormat format, RequestSendHandler &ncr_send_handler, const size_t send_que_max=NameChangeSender::MAX_QUEUE_DEFAULT, const bool reuse_address=false)
	Constructor. More...

virtual	~NameChangeUDPSender ()
	Destructor. More...

virtual void	close ()
	Closes the UDPSocket. More...

virtual void	doSend (NameChangeRequestPtr &ncr)
	Sends a given request asynchronously over the socket. More...

virtual int	getSelectFd ()
	Returns a file descriptor suitable for use with select. More...

virtual bool	ioReady ()
	Returns whether or not the sender has IO ready to process. More...

virtual void	open (isc::asiolink::IOService &io_service)
	Opens a UDP socket using the given IOService. More...

void	sendCompletionHandler (const bool successful, const UDPCallback *send_callback)
	Implements the NameChangeRequest level send completion handler. More...

Public Member Functions inherited from isc::dhcp_ddns::NameChangeSender
	NameChangeSender (RequestSendHandler &send_handler, size_t send_queue_max=MAX_QUEUE_DEFAULT)
	Constructor. More...

virtual	~NameChangeSender ()
	Destructor. More...

bool	amSending () const
	Returns true if the sender is in send mode, false otherwise. More...

void	assumeQueue (NameChangeSender &source_sender)
	Move all queued requests from a given sender into the send queue. More...

void	clearSendQueue ()
	Flushes all entries in the send queue. More...

size_t	getQueueMaxSize () const
	Returns the maximum number of entries allowed in the send queue. More...

size_t	getQueueSize () const
	Returns the number of entries currently in the send queue. More...

bool	isSendInProgress () const
	Returns true when a send is in progress. More...

const NameChangeRequestPtr &	peekAt (const size_t index) const
	Returns the entry at a given position in the queue. More...

virtual void	runReadyIO ()
	Processes sender IO events. More...

void	sendRequest (NameChangeRequestPtr &ncr)
	Queues the given request to be sent. More...

void	setQueueMaxSize (const size_t new_max)
	Sets the maximum queue size to the given value. More...

void	skipNext ()
	Removes the request at the front of the send queue. More...

void	startSending (isc::asiolink::IOService &io_service)
	Prepares the IO for transmission. More...

void	stopSending ()
	Closes the IO sink and stops send logic. More...

Static Public Attributes
static const size_t	SEND_BUF_MAX = NameChangeUDPListener::RECV_BUF_MAX
	Defines the maximum size packet that can be sent. More...

Static Public Attributes inherited from isc::dhcp_ddns::NameChangeSender
static const size_t	MAX_QUEUE_DEFAULT = 1024
	Defines a default maximum number of entries in the send queue. More...

Additional Inherited Members
Public Types inherited from isc::dhcp_ddns::NameChangeSender
enum	Result { SUCCESS, TIME_OUT, STOPPED, ERROR }
	Defines the outcome of an asynchronous NCR send. More...

typedef std::deque< NameChangeRequestPtr >	SendQueue
	Defines the type used for the request send queue. More...

Protected Member Functions inherited from isc::dhcp_ddns::NameChangeSender
SendQueue &	getSendQueue ()
	Returns a reference to the send queue. More...

void	invokeSendHandler (const NameChangeSender::Result result)
	Calls the NCR send completion handler registered with the sender. More...

void	sendNext ()
	Dequeues and sends the next request on the send queue in a thread safe context. More...

Detailed Description

Provides the ability to send NameChangeRequests via UDP socket.

This class is a derivation of the NameChangeSender which is capable of sending NameChangeRequests through a UDP socket. The caller need only supply network addressing and a RequestSendHandler instance to send NameChangeRequests asynchronously.

Definition at line 441 of file ncr_udp.h.

Constructor & Destructor Documentation

isc::dhcp_ddns::NameChangeUDPSender::NameChangeUDPSender	(	const isc::asiolink::IOAddress &	ip_address,
		const uint32_t	port,
		const isc::asiolink::IOAddress &	server_address,
		const uint32_t	server_port,
		const NameChangeFormat	format,
		RequestSendHandler &	ncr_send_handler,
		const size_t	send_que_max = `NameChangeSender::MAX_QUEUE_DEFAULT`,
		const bool	reuse_address = `false`
	)

Constructor.

Parameters

ip_address	the IP address from which to send
port	the port from which to send
server_address	the IP address of the target listener
server_port	is the IP port of the target listener
format	is the wire format of the outbound requests.
ncr_send_handler	the send handler object to notify when when a send completes.
send_que_max	sets the maximum number of entries allowed in the send queue. It defaults to NameChangeSender::MAX_QUEUE_DEFAULT
reuse_address	enables IP address sharing when true It defaults to false.

Definition at line 196 of file ncr_udp.cc.

References SEND_BUF_MAX, and sendCompletionHandler().

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isc::dhcp_ddns::NameChangeUDPSender::~NameChangeUDPSender ( )

virtual

Destructor.

Definition at line 216 of file ncr_udp.cc.

References isc::dhcp_ddns::NameChangeSender::stopSending().

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Member Function Documentation

void isc::dhcp_ddns::NameChangeUDPSender::close ( )

virtual

Closes the UDPSocket.

It first invokes the socket's cancel method which should stop any pending send and remove the socket callback from the IOService. It then calls the socket's close method to actually close the socket.

Exceptions

NcrUDPError if the open fails.

Implements isc::dhcp_ddns::NameChangeSender.

Definition at line 258 of file ncr_udp.cc.

References isc_throw.

void isc::dhcp_ddns::NameChangeUDPSender::doSend ( NameChangeRequestPtr & ncr )

virtual

Sends a given request asynchronously over the socket.

The given NameChangeRequest is converted to wire format and copied into the send callback's transfer buffer. Then the socket's asyncSend() method is called, passing in send_callback_ member's transfer buffer as the send buffer and the send_callback_ itself as the callback object.

Parameters

ncr	NameChangeRequest to send.

Implements isc::dhcp_ddns::NameChangeSender.

Definition at line 287 of file ncr_udp.cc.

References isc::util::OutputBuffer::getData(), isc::util::OutputBuffer::getLength(), and SEND_BUF_MAX.

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int isc::dhcp_ddns::NameChangeUDPSender::getSelectFd ( )

virtual

Returns a file descriptor suitable for use with select.

The value returned is an open file descriptor which can be used with select() system call to monitor the sender for IO events. This allows NameChangeUDPSenders to be used in applications which use select, rather than IOService to wait for IO events to occur.

Warning: Attempting other use of this value may lead to unpredictable behavior in the sender.

Returns: Returns an "open" file descriptor

Exceptions

NcrSenderError if the sender is not in send mode,

Implements isc::dhcp_ddns::NameChangeSender.

Definition at line 349 of file ncr_udp.cc.

References isc::dhcp_ddns::NameChangeSender::amSending(), and isc_throw.

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bool isc::dhcp_ddns::NameChangeUDPSender::ioReady ( )

virtual

Returns whether or not the sender has IO ready to process.

Returns: true if the sender has at IO ready, false otherwise.

Implements isc::dhcp_ddns::NameChangeSender.

Definition at line 359 of file ncr_udp.cc.

void isc::dhcp_ddns::NameChangeUDPSender::open ( isc::asiolink::IOService & io_service )

virtual

Opens a UDP socket using the given IOService.

Creates a NameChangeUDPSocket bound to the sender's IP address and port, that is monitored by the given IOService instance.

Parameters

io_service the IOService which will monitor the socket.

Exceptions

NcrUDPError if the open fails.

Implements isc::dhcp_ddns::NameChangeSender.

Definition at line 222 of file ncr_udp.cc.

References isc::asiolink::IOService::get_io_service(), isc::asiolink::UDPEndpoint::getASIOEndpoint(), isc_throw, and isc::asiolink::IOAddress::isV4().

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void isc::dhcp_ddns::NameChangeUDPSender::sendCompletionHandler	(	const bool	successful,
		const UDPCallback *	send_callback
	)

Implements the NameChangeRequest level send completion handler.

This method is invoked by the UDPCallback operator() implementation, passing in the boolean success indicator and pointer to itself.

If the indicator denotes success, then the method will notify the application layer by calling invokeSendHandler() with a success status.

If the indicator denotes failure the method will log the failure and notify the application layer by calling invokeRecvHandler() with an error status.

Parameters

successful	boolean indicator that should be true if the socket send completed without error, false otherwise.
send_callback	pointer to the callback instance which handled the socket receive completion.

Definition at line 310 of file ncr_udp.cc.

References isc::dhcp_ddns::dhcp_ddns_logger, isc::dhcp_ddns::DHCP_DDNS_NCR_UDP_CLEAR_READY_ERROR, isc::dhcp_ddns::DHCP_DDNS_NCR_UDP_SEND_CANCELED, isc::dhcp_ddns::DHCP_DDNS_NCR_UDP_SEND_ERROR, isc::dhcp_ddns::NameChangeSender::ERROR, isc::dhcp_ddns::UDPCallback::getErrorCode(), isc::dhcp_ddns::NameChangeSender::invokeSendHandler(), LOG_ERROR, isc::dhcp_ddns::NameChangeSender::STOPPED, and isc::dhcp_ddns::NameChangeSender::SUCCESS.

Referenced by NameChangeUDPSender().

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Member Data Documentation

const size_t isc::dhcp_ddns::NameChangeUDPSender::SEND_BUF_MAX = NameChangeUDPListener::RECV_BUF_MAX

static

Defines the maximum size packet that can be sent.

Definition at line 445 of file ncr_udp.h.

Referenced by doSend(), and NameChangeUDPSender().

The documentation for this class was generated from the following files:

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation