PacketPeerUDP

    UDP packet peer.

    UDP packet peer. Can be used to send raw UDP packets as well as s.

    • void close ( )

    Closes the UDP socket the is currently listening on.

    Calling this method connects this UDP peer to the given host/port pair. UDP is in reality connectionless, so this option only means that incoming packets from different addresses are automatically discarded, and that outgoing packets are always sent to the connected address (future calls to set_dest_address are not allowed). This method does not send any data to the remote peer, to do that, use or PacketPeer.put_packet as usual. See also .

    Note: Connecting to the remote peer does not help to protect from malicious attacks like IP spoofing, etc. Think about using an encryption technique like SSL or DTLS if you feel like your application is transferring sensitive information.

    • String get_packet_ip ( ) const

    Returns the IP of the remote peer that sent the last packet(that was received with or PacketPeer.get_var).

    • get_packet_port ( ) const

    Returns the port of the remote peer that sent the last packet(that was received with PacketPeer.get_packet or ).

    • bool is_connected_to_host ( ) const
    • is_listening ( ) const

    Returns whether this PacketPeerUDP is listening.

    Joins the multicast group specified by multicast_address using the interface identified by interface_name.

    You can join the same multicast group with multiple interfaces. Use IP.get_local_interfaces to know which are available.

    Note: Some Android devices might require the CHANGE_WIFI_MULTICAST_STATE permission for multicast to work.

    • leave_multicast_group ( String multicast_address, interface_name )

    Removes the interface identified by from the multicast group specified by multicast_address.

    • Error listen ( port, String bind_address=”*“, recv_buf_size=65536 )

    Makes this PacketPeerUDP listen on the port binding to bind_address with a buffer size recv_buf_size.

    If bind_address is set to "*" (default), the peer will listen on all available addresses (both IPv4 and IPv6).

    If bind_address is set to any valid address (e.g. "192.168.1.101", "::1", etc), the peer will only listen on the interface with that addresses (or fail if no interface with the given address exists).

    • void set_broadcast_enabled ( bool enabled )

    Enable or disable sending of broadcast packets (e.g. set_dest_address("255.255.255.255", 4343). This option is disabled by default.

    Note: Some Android devices might require the CHANGE_WIFI_MULTICAST_STATE permission and this option to be enabled to receive broadcast packets too.

    • set_dest_address ( String host, port )

    Sets the destination address and port for sending packets and variables. A hostname will be resolved using DNS if needed.

    Note: set_broadcast_enabled must be enabled before sending packets to a broadcast address (e.g. ).

    Waits for a packet to arrive on the listening port. See .

    Note: wait can’t be interrupted once it has been called. This can be worked around by allowing the other party to send a specific “death pill” packet like this: