// // Copyright (C) 2000 Institut fuer Telematik, Universitaet Karlsruhe // Copyright (C) 2004,2005 Andras Varga // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // // UDP protocol implementation, for IPv4 and IPv6. // // The \UDP protocol header is represented by the class UDPPacket. // // <b>Communication with clients (applications)</b> // // The module can (should) be connected to several applications. // For sending an \UDP packet, the application should attach an UDPControlInfo // object to the payload, and send it to UDP. // UDP will also attach an UDPControlInfo object to any payload // message in sends up to the application. // // For receiving \UDP packets, the connected applications should first // "bind" to the given \UDP port. This can be done by sending an // arbitrary message with message kind UDP_C_BIND and an UDPControlInfo // attached with srcPort filled in. // // If there is only one app which doesn't bind to any port, it will // receive all packets. // // <b>Communication with the \IP (IPv4/IPv6) layer</b> // // The UDP model relies on sending and receiving IPControlInfo/IPv6ControlInfo // objects attached to UDPPacket objects as control info // (see cMessage::setControlInfo()). // // @see UDPPacket, UDPControlInfo, UDPCommandCode // simple UDP gates: in: from_app[]; in: from_ip; in: from_ipv6; out: to_app[]; out: to_ip; out: to_ipv6; endsimple