jsocketpp::DatagramPacket Class Reference

Represents a UDP datagram packet, encapsulating both payload and addressing information. More...

#include <DatagramPacket.hpp>

Public Member Functions
	DatagramPacket (const size_t size=0)
	Construct an empty DatagramPacket with a specified buffer size.
	DatagramPacket (std::string_view data, std::string addr, const Port prt)
	Construct a DatagramPacket from a string_view and destination info.
	DatagramPacket (const char *data, const size_t len, std::string addr, const Port prt)
	Construct a DatagramPacket from a raw pointer/size and destination info.
	DatagramPacket (const DatagramPacket &)=default
	DatagramPacket (DatagramPacket &&) noexcept=default
DatagramPacket &	operator= (const DatagramPacket &)=default
DatagramPacket &	operator= (DatagramPacket &&) noexcept=default
void	resize (const size_t newSize)
	Resize the packet's internal buffer.
size_t	size () const noexcept
	Get the current size of the buffer (valid bytes for receive/send).
void	clear ()
	Reset the packet (clears buffer, address, and port).
bool	hasDestination () const noexcept
	Report whether this packet specifies an explicit destination (address + port).

Public Attributes
std::vector< char >	buffer
	Data buffer for the packet payload.
std::string	address {}
	Remote address (IPv4/IPv6) for the destination/source.
Port	port = 0
	Remote UDP port for the destination/source.

Detailed Description

Represents a UDP datagram packet, encapsulating both payload and addressing information.

The DatagramPacket class provides a convenient way to manage the data and addressing needed for sending or receiving UDP packets using the DatagramSocket class. Each datagram packet can hold a buffer for the payload, a remote IP address, and a port number.

Typical usage:

jsocketpp::DatagramPacket packetToSend("Hello, world!", "192.168.1.10", 12345);
socket.write(packetToSend);
 
jsocketpp::DatagramPacket receivedPacket(1024); // Prepare a buffer for receiving
socket.read(receivedPacket);
std::cout << "Received from: " << receivedPacket.address << ":" << receivedPacket.port << std::endl;
std::cout << "Data: " << std::string(receivedPacket.buffer.begin(), receivedPacket.buffer.end()) << std::endl;

Note

• For sending: set the buffer, address, and port before passing to DatagramSocket::write.
• For receiving: use an empty DatagramPacket with a pre-sized buffer; after read, the address/port will be filled in.

See also

jsocketpp::DatagramSocket

Author

MangaD

Date

2025

Version

1.0

Constructor & Destructor Documentation

DatagramPacket() [1/5]

jsocketpp::DatagramPacket::DatagramPacket ( const size_t size = 0 )

inlineexplicit

Construct an empty DatagramPacket with a specified buffer size.

Parameters

size	Initial size of the internal buffer (default: 0).

DatagramPacket() [2/5]

jsocketpp::DatagramPacket::DatagramPacket ( std::string_view data, std::string addr, const Port prt )

inline

Construct a DatagramPacket from a string_view and destination info.

Parameters

data	Data to be copied into the packet buffer.
addr	Destination address.
prt	Destination UDP port.

DatagramPacket() [3/5]

jsocketpp::DatagramPacket::DatagramPacket ( const char * data, const size_t len, std::string addr, const Port prt )

inline

Construct a DatagramPacket from a raw pointer/size and destination info.

Parameters

data	Pointer to data buffer.
len	Number of bytes to copy.
addr	Destination address.
prt	Destination UDP port.

DatagramPacket() [4/5]

jsocketpp::DatagramPacket::DatagramPacket ( const DatagramPacket & )

default

DatagramPacket() [5/5]

jsocketpp::DatagramPacket::DatagramPacket ( DatagramPacket && )

defaultnoexcept

Member Function Documentation

clear()

void jsocketpp::DatagramPacket::clear ( )

inline

Reset the packet (clears buffer, address, and port).

operator=() [1/2]

DatagramPacket & jsocketpp::DatagramPacket::operator= ( const DatagramPacket & )

default

operator=() [2/2]

DatagramPacket & jsocketpp::DatagramPacket::operator= ( DatagramPacket && )

defaultnoexcept

resize()

void jsocketpp::DatagramPacket::resize ( const size_t newSize )

inline

Resize the packet's internal buffer.

Parameters

newSize

The new size for the buffer.

size()

size_t jsocketpp::DatagramPacket::size ( ) const

inlinenodiscardnoexcept

Get the current size of the buffer (valid bytes for receive/send).

Returns

Size of buffer in bytes.

Member Data Documentation

address

std::string jsocketpp::DatagramPacket::address {}

Remote address (IPv4/IPv6) for the destination/source.

• On send: set to the destination address.
• On receive: will be filled with sender's address.

buffer

std::vector<char> jsocketpp::DatagramPacket::buffer

Data buffer for the packet payload.

• On sending: Contains the data to transmit.
• On receiving: Filled with received data (size indicates bytes received).

port

Port jsocketpp::DatagramPacket::port = 0

Remote UDP port for the destination/source.

• On send: set to the destination port.
• On receive: will be filled with sender's port.

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

• include/jsocketpp/DatagramPacket.hpp