• Skip to main content
  • Skip to header right navigation
  • Skip to site footer
CDP Studio logo

CDP Studio

The no-code and full-code software development tool for distributed control systems and HMI

  • Doc
  • Why CDP
    • Software developers
    • Automation engineers
    • Managers
  • Products
    • Automation Designer
    • HMI Designer
    • Maritime HMIs
  • Services
  • Use cases
  • Pricing
  • Try CDP

CDP Studio Documentation

  • Framework - CDP Core
  • UDPTransport
  • 5.0.0

UDPTransport Class

(CDP::IO::UDPTransport)

The UDPTransport is a class used to simplify the handling of configurable UDP communication in an IOServer. More...

Header: #include <UDPTransport>
Inherits: NetworkTransport and UdpSendReceive
  • List of all members, including inherited members

Public Functions

UDPTransport(const std::function<unsigned int( Transport *, char *, unsigned int ) > readCallbackHandler)

Reimplemented Public Functions

virtual void Close() override
virtual std::string GetNodeTypeName() const override
virtual bool IsError() override
virtual bool IsOpen() const override
virtual bool Open(Transport::OpenMode mode) override
virtual unsigned int Read(char *data, unsigned int length, double timeout = 0.0) override
virtual unsigned int Write(const char *data, unsigned int length, double timeout = 0.0) override
  • 10 public functions inherited from CDP::IO::NetworkTransport
  • 28 public functions inherited from UdpSendReceive
  • 12 public functions inherited from CDP::IO::Transport
  • 27 public functions inherited from CDP::StudioAPI::CDPNode
  • 22 public functions inherited from CDP::StudioAPI::ICDPNode

Additional Inherited Members

  • 1 static public member inherited from CDP::IO::Transport
  • 3 protected functions inherited from UdpSendReceive
  • 1 protected function inherited from CDP::StudioAPI::CDPNode
  • 12 protected variables inherited from UdpSendReceive

Detailed Description

The UDPTransport is a class used to simplify the handling of configurable UDP communication in an IOServer.

See also NetworkTransport, Transport, and TCPTransport.

Member Function Documentation

UDPTransport::UDPTransport(const std::function<unsigned int( Transport *, char *, unsigned int ) > readCallbackHandler)

Constructs UDPTransport and sets callbackHandler

[override virtual] void UDPTransport::Close()

Reimplemented from Transport::Close().

Colses the socket

[override virtual] std::string UDPTransport::GetNodeTypeName() const

Reimplemented from ICDPNode::GetNodeTypeName().

Returns "UDPTransport"

[override virtual] bool UDPTransport::IsError()

Reimplemented from Transport::IsError().

Returns true if there is a socket error, false if not.

[override virtual] bool UDPTransport::IsOpen() const

Reimplemented from Transport::IsOpen().

Returns true if socket is open, false if not.

[override virtual] bool UDPTransport::Open(Transport::OpenMode mode)

Reimplemented from Transport::Open().

Opens the socket, depending on OpenMode.

[override virtual] unsigned int UDPTransport::Read(char *data, unsigned int length, double timeout = 0.0)

Reimplemented from Transport::Read().

Reads length bytes of data from the udp socket within timeout [seconds]. If timeout<=0.0, the timeout from the configuration is used. Returns Number of bytes read.

It is assumed that data is a buffer that the caller has allocated, and that it is at least length bytes long. Read will block for how long it takes to read the data, or for timeout seconds, whichever comes first.

As Read() is a blocking call, do not call it from a Process() function. See CDPComponent and OSAPIThread for more information about component threads.

[override virtual] unsigned int UDPTransport::Write(const char *data, unsigned int length, double timeout = 0.0)

Reimplemented from Transport::Write().

Writes the packet data to the configured ip/port. Returns number of bytes written.

It is assumed that data is a buffer that the caller has allocated, and that it is at least length bytes long. Write will block for up to timeout seconds for the output to be ready before attempting to write the data.

As Write() is a blocking call, do not call it from a Process() function. See CDPComponent and OSAPIThread for more information about component threads.

The content of this document is confidential information not to be published without the consent of CDP Technologies AS.

CDP Technologies AS, www.cdpstudio.com

Get started with CDP Studio today

Let us help you take your great ideas and turn them into the products your customer will love.

Try CDP Studio for free
Why CDP Studio?

CDP Technologies AS
Hundsværgata 8,
P.O. Box 144
6001 Ålesund, Norway

Tel: +47 990 80 900
E-mail: info@cdptech.com

Company

About CDP

Contact us

Services

Partners

Blog

Developers

Get started

User manuals

Support

Document download

Release notes

My account

Follow CDP

  • LinkedIn
  • YouTube
  • GitHub

© Copyright 2025 CDP Technologies. Privacy and cookie policy.

Return to top