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isc::asiolink::UDPSocket< C > Class Template Reference

The `UDPSocket` class is a concrete derived class of `IOAsioSocket` that represents a UDP socket. More...

`#include <udp_socket.h>`

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## Public Types
enum | { MIN_SIZE = 4096 }
Public Types inherited from isc::asiolink::IOSocket
typedef boost::asio::socket_base::reuse_address | ReuseAddress
| Represents SO_REUSEADDR socket option.

## Public Member Functions
| UDPSocket (boost::asio::ip::udp::socket &socket)
| Constructor from an ASIO UDP socket.
| UDPSocket (const IOServicePtr &service)
| Constructor.
virtual | ~UDPSocket ()
| Destructor.
virtual void | asyncReceive (void *data, size_t length, size_t offset, IOEndpoint *endpoint, C &callback)
| Receive Asynchronously.
virtual void | asyncSend (const void *data, size_t length, const IOEndpoint *endpoint, C &callback)
| Send Asynchronously.
virtual void | cancel ()
| Cancel I/O On Socket.
virtual void | close ()
| Close socket.
virtual int | getNative () const
| Return file descriptor of underlying socket.
virtual int | getProtocol () const
| Return protocol of socket.
virtual bool | isOpenSynchronous () const
| Is "open()" synchronous?
virtual void | open (const IOEndpoint *endpoint, C &callback)
| Open Socket.
virtual bool | processReceivedData (const void *staging, size_t length, size_t &cumulative, size_t &offset, size_t &expected, isc::util::OutputBufferPtr &buff)
| Process received data.
virtual | ~IOAsioSocket ()=default
| The destructor.
virtual | ~IOSocket ()
| The destructor.

## Additional Inherited Members
static IOSocket & | getDummyUDPSocket ()
| Return a non-usable "dummy" UDP socket for testing.
static IOSocket & | getDummyTCPSocket ()
| Return a non-usable "dummy" TCP socket for testing.
| IOAsioSocket ()
| The default constructor.
| IOSocket ()
| The default constructor.

## Detailed Description

template<typename C>
class isc::asiolink::UDPSocket< C >

The `UDPSocket` class is a concrete derived class of `IOAsioSocket` that represents a UDP socket.

Parameters

  C | Callback type

Definition at line 35 of file udp_socket.h.

## Member Enumeration Documentation

## ◆ anonymous enum

template<typename C>

anonymous enum

Enumerator
MIN_SIZE |

Definition at line 42 of file udp_socket.h.

## Constructor & Destructor Documentation

## ◆ UDPSocket() [1/2]

template<typename C>

isc::asiolink::UDPSocket< C >::UDPSocket | ( | boost::asio::ip::udp::socket & | socket | ) |

Constructor from an ASIO UDP socket.

Parameters

  socket | The ASIO representation of the UDP socket. It is assumed that the caller will open and close the socket, so these operations are a no-op for that socket.

Definition at line 166 of file udp_socket.h.

## ◆ UDPSocket() [2/2]

template<typename C>

isc::asiolink::UDPSocket< C >::UDPSocket | ( | const IOServicePtr & | service | ) |

Constructor.

Used when the UDPSocket is being asked to manage its own internal socket. In this case, the open() and close() methods are used.

Parameters

  service | I/O Service object used to manage the socket.

Definition at line 173 of file udp_socket.h.

## ◆ ~UDPSocket()

template<typename C>

isc::asiolink::UDPSocket< C >::~UDPSocket | ( |  | ) |
| virtual

Destructor.

Definition at line 181 of file udp_socket.h.

References close().

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## Member Function Documentation

## ◆ asyncReceive()

template<typename C>

void isc::asiolink::UDPSocket< C >::asyncReceive | ( | void * | data,
|  | size_t | length,
|  | size_t | offset,
|  | IOEndpoint * | endpoint,
|  | C & | callback )
| virtual

Receive Asynchronously.

Calls the underlying socket's async_receive_from() method to read a packet of data from a remote endpoint. Arrival of the data is signalled via a call to the callback function.

Parameters

  data | Buffer to receive incoming message
  length | Length of the data buffer
  offset | Offset into buffer where data is to be put
  endpoint | Source of the communication
  callback | Callback object

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 250 of file udp_socket.h.

References isc::asiolink::UDPEndpoint::getASIOEndpoint(), isc::asiolink::IOEndpoint::getProtocol(), isc_throw, and isc_throw_assert.

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## ◆ asyncSend()

template<typename C>

void isc::asiolink::UDPSocket< C >::asyncSend | ( | const void * | data,
|  | size_t | length,
|  | const IOEndpoint * | endpoint,
|  | C & | callback )
| virtual

Send Asynchronously.

Calls the underlying socket's async_send_to() method to send a packet of data asynchronously to the remote endpoint. The callback will be called on completion.

Parameters

  data | Data to send
  length | Length of data to send
  endpoint | Target of the send
  callback | Callback object.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 224 of file udp_socket.h.

References isc::asiolink::UDPEndpoint::getASIOEndpoint(), isc::asiolink::IOEndpoint::getProtocol(), isc_throw, and isc_throw_assert.

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## ◆ cancel()

template<typename C>

void isc::asiolink::UDPSocket< C >::cancel | ( |  | ) |
| virtual

Cancel I/O On Socket.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 297 of file udp_socket.h.

## ◆ close()

template<typename C>

void isc::asiolink::UDPSocket< C >::close | ( |  | ) |
| virtual

Close socket.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 307 of file udp_socket.h.

Referenced by ~UDPSocket().

## ◆ getNative()

template<typename C>

virtual int isc::asiolink::UDPSocket< C >::getNative | ( |  | ) | const
| inline virtual

Return file descriptor of underlying socket.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 65 of file udp_socket.h.

## ◆ getProtocol()

template<typename C>

virtual int isc::asiolink::UDPSocket< C >::getProtocol | ( |  | ) | const
| inline virtual

Return protocol of socket.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 70 of file udp_socket.h.

## ◆ isOpenSynchronous()

template<typename C>

virtual bool isc::asiolink::UDPSocket< C >::isOpenSynchronous | ( |  | ) | const
| inline virtual

Is "open()" synchronous?

Indicates that the opening of a UDP socket is synchronous.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 77 of file udp_socket.h.

## ◆ open()

template<typename C>

void isc::asiolink::UDPSocket< C >::open | ( | const IOEndpoint * | endpoint,
|  | C & | callback )
| virtual

Open Socket.

Opens the UDP socket. This is a synchronous operation.

Parameters

  endpoint | Endpoint to which the socket will send data. This is used to determine the address family that should be used for the underlying socket.
  callback | Unused as the operation is synchronous.

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 188 of file udp_socket.h.

References isc::asiolink::IOEndpoint::getFamily(), and MIN_SIZE.

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## ◆ processReceivedData()

template<typename C>

bool isc::asiolink::UDPSocket< C >::processReceivedData | ( | const void * | staging,
|  | size_t | length,
|  | size_t & | cumulative,
|  | size_t & | offset,
|  | size_t & | expected,
|  | isc::util::OutputBufferPtr & | buff )
| virtual

Process received data.

See the description of IOAsioSocket::receiveComplete for a complete description of this method.

Parameters

  staging | Pointer to the start of the staging buffer.
  length | Amount of data in the staging buffer.
  cumulative | Amount of data received before the staging buffer is processed.
  offset | Unused.
  expected | unused.
  buff | Output buffer. Data in the staging buffer is be copied to this output buffer in the call.

Returns
  Always true

Implements isc::asiolink::IOAsioSocket< C >.

Definition at line 278 of file udp_socket.h.

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

- udp_socket.h