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juce::DatagramSocket Class Referencefinal

#include <juce_Socket.h>

Public Member Functions

 DatagramSocket (bool enableBroadcasting=false)
 
 ~DatagramSocket ()
 
bool bindToPort (int localPortNumber)
 
bool bindToPort (int localPortNumber, const String &localAddress)
 
int getBoundPort () const noexcept
 
int getRawSocketHandle () const noexcept
 
int waitUntilReady (bool readyForReading, int timeoutMsecs)
 
int read (void *destBuffer, int maxBytesToRead, bool blockUntilSpecifiedAmountHasArrived)
 
int read (void *destBuffer, int maxBytesToRead, bool blockUntilSpecifiedAmountHasArrived, String &senderIPAddress, int &senderPortNumber)
 
int write (const String &remoteHostname, int remotePortNumber, const void *sourceBuffer, int numBytesToWrite)
 
void shutdown ()
 
bool joinMulticast (const String &multicastIPAddress)
 
bool leaveMulticast (const String &multicastIPAddress)
 
bool setMulticastLoopbackEnabled (bool enableLoopback)
 
bool setEnablePortReuse (bool enabled)
 

Detailed Description

A wrapper for a datagram (UDP) socket.

This allows low-level use of sockets; for an easier-to-use messaging layer on top of sockets, you could also try the InterprocessConnection class.

See also
StreamingSocket, InterprocessConnection, InterprocessConnectionServer

Definition at line 203 of file juce_Socket.h.

Constructor & Destructor Documentation

◆ DatagramSocket()

juce::DatagramSocket::DatagramSocket ( bool  enableBroadcasting = false)

Creates a datagram socket.

You first need to bind this socket to a port with bindToPort if you intend to read from this socket.

If enableBroadcasting is true, the socket will be allowed to send broadcast messages (may require extra privileges on linux)

Definition at line 633 of file juce_Socket.cpp.

◆ ~DatagramSocket()

juce::DatagramSocket::~DatagramSocket ( )

Destructor.

Definition at line 646 of file juce_Socket.cpp.

Member Function Documentation

◆ bindToPort() [1/2]

bool juce::DatagramSocket::bindToPort ( int  localPortNumber)

Binds the socket to the specified local port.

The localPortNumber is the port on which to bind this socket. If this value is 0, the port number is assigned by the operating system.

Returns
true on success; false may indicate that another socket is already bound on the same port

Definition at line 668 of file juce_Socket.cpp.

Referenced by juce::NetworkServiceDiscovery::AvailableServiceList::AvailableServiceList(), and bindToPort().

◆ bindToPort() [2/2]

bool juce::DatagramSocket::bindToPort ( int  localPortNumber,
const String localAddress 
)

Binds the socket to the specified local port and local address.

If localAddress is not an empty string then the socket will be bound to localAddress as well. This is useful if you would like to bind your socket to a specific network adapter. Note that localAddress must be an IP address assigned to one of your network address otherwise this function will fail.

Returns
true on success; false may indicate that another socket is already bound on the same port
See also
bindToPort(int localPortNumber), IPAddress::getAllAddresses

Definition at line 673 of file juce_Socket.cpp.

◆ getBoundPort()

int juce::DatagramSocket::getBoundPort ( ) const
noexcept

Returns the local port number to which this socket is currently bound.

This is useful if you need to know to which port the OS has actually bound your socket when bindToPort was called with zero.

Returns
-1 if the socket didn't bind to any port yet or an error occurred

Definition at line 690 of file juce_Socket.cpp.

◆ getRawSocketHandle()

int juce::DatagramSocket::getRawSocketHandle ( ) const
inlinenoexcept

Returns the OS's socket handle that's currently open.

Definition at line 255 of file juce_Socket.h.

◆ joinMulticast()

bool juce::DatagramSocket::joinMulticast ( const String multicastIPAddress)

Join a multicast group.

Returns
true if it succeeds

Definition at line 752 of file juce_Socket.cpp.

◆ leaveMulticast()

bool juce::DatagramSocket::leaveMulticast ( const String multicastIPAddress)

Leave a multicast group.

Returns
true if it succeeds

Definition at line 760 of file juce_Socket.cpp.

◆ read() [1/2]

int juce::DatagramSocket::read ( void destBuffer,
int  maxBytesToRead,
bool  blockUntilSpecifiedAmountHasArrived 
)

Reads bytes from the socket.

If blockUntilSpecifiedAmountHasArrived is true, the method will block until maxBytesToRead bytes have been read, (or until an error occurs). If this flag is false, the method will return as much data as is currently available without blocking.

Returns
the number of bytes read, or -1 if there was an error
See also
waitUntilReady

Definition at line 704 of file juce_Socket.cpp.

◆ read() [2/2]

int juce::DatagramSocket::read ( void destBuffer,
int  maxBytesToRead,
bool  blockUntilSpecifiedAmountHasArrived,
String senderIPAddress,
int senderPortNumber 
)

Reads bytes from the socket and return the IP address of the sender.

If blockUntilSpecifiedAmountHasArrived is true, the method will block until maxBytesToRead bytes have been read, (or until an error occurs). If this flag is false, the method will return as much data as is currently available without blocking.

Returns
the number of bytes read, or -1 if there was an error. On a successful result, the senderIPAddress value will be set to the IP of the sender
See also
waitUntilReady

Definition at line 714 of file juce_Socket.cpp.

◆ setEnablePortReuse()

bool juce::DatagramSocket::setEnablePortReuse ( bool  enabled)

Allow other applications to re-use the port.

Allow any other application currently running to bind to the same port. Do not use this if your socket handles sensitive data as it could be read by any, possibly malicious, third-party apps.

Returns
true on success

Definition at line 776 of file juce_Socket.cpp.

◆ setMulticastLoopbackEnabled()

bool juce::DatagramSocket::setMulticastLoopbackEnabled ( bool  enableLoopback)

Enables or disables multicast loopback.

Returns
true if it succeeds

Definition at line 768 of file juce_Socket.cpp.

◆ shutdown()

void juce::DatagramSocket::shutdown ( )

Closes the underlying socket object.

Closes the underlying socket object and aborts any read or write operations. Note that all other methods will return an error after this call and the object cannot be re-used.

This method is useful if another thread is blocking in a read/write call and you would like to abort the read/write thread. Simply deleting the socket object without calling shutdown may cause a race-condition where the read/write returns just before the socket is deleted and the subsequent read/write would try to read from an invalid pointer. By calling shutdown first, the socket object remains valid but all current and subsequent calls to read/write will return immediately.

Definition at line 654 of file juce_Socket.cpp.

Referenced by ~DatagramSocket().

◆ waitUntilReady()

int juce::DatagramSocket::waitUntilReady ( bool  readyForReading,
int  timeoutMsecs 
)

Waits until the socket is ready for reading or writing.

If readyForReading is true, it will wait until the socket is ready for reading; if false, it will wait until it's ready for writing.

If the timeout is < 0, it will wait forever, or else will give up after the specified time.

Returns
1 if the socket is ready on return, 0 if it times-out before the socket becomes ready, or -1 if an error occurs

Definition at line 696 of file juce_Socket.cpp.

◆ write()

int juce::DatagramSocket::write ( const String remoteHostname,
int  remotePortNumber,
const void sourceBuffer,
int  numBytesToWrite 
)

Writes bytes to the socket from a buffer.

Note that this method will block unless you have checked the socket is ready for writing before calling it (see the waitUntilReady() method).

Returns
the number of bytes written, or -1 if there was an error

Definition at line 724 of file juce_Socket.cpp.


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