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//
// header.hh : Diffusion Datagram Header
// authors : Chalermek Intanagonwiwat and Fabio Silva
//
// Copyright (C) 2000-2002 by the University of Southern California
// $Id: header.hh,v 1.8 2006/02/21 15:20:18 mahrenho Exp $
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License,
// version 2, as published by the Free Software Foundation.
//
// 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.
//
// Linking this file statically or dynamically with other modules is making
// a combined work based on this file. Thus, the terms and conditions of
// the GNU General Public License cover the whole combination.
//
// In addition, as a special exception, the copyright holders of this file
// give you permission to combine this file with free software programs or
// libraries that are released under the GNU LGPL and with code included in
// the standard release of ns-2 under the Apache 2.0 license or under
// otherwise-compatible licenses with advertising requirements (or modified
// versions of such code, with unchanged license). You may copy and
// distribute such a system following the terms of the GNU GPL for this
// file and the licenses of the other code concerned, provided that you
// include the source code of that other code when and as the GNU GPL
// requires distribution of source code.
//
// Note that people who make modified versions of this file are not
// obligated to grant this special exception for their modified versions;
// it is their choice whether to do so. The GNU General Public License
// gives permission to release a modified version without this exception;
// this exception also makes it possible to release a modified version
// which carries forward this exception.
#ifndef _HEADER_HH_
#define _HEADER_HH_
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif // HAVE_CONFIG_H
#include "nr/nr.hh"
typedef int *DiffPacket;
#define MAX_PKT_SIZE 8192
#define BROADCAST_ADDR -1
#define LOCALHOST_ADDR -2
#define DIFFUSION_VERSION 3
#ifdef NS_DIFFUSION
#define DEFAULT_DIFFUSION_PORT 255
#else
#define DEFAULT_DIFFUSION_PORT 2000
#endif // NS_DIFFUSION
#define DIFFUSION_PORT DEFAULT_DIFFUSION_PORT
// For accessing fields in the diffusion header
#define LAST_HOP(x) (x)->last_hop
#define NEXT_HOP(x) (x)->next_hop
#define DIFF_VER(x) (x)->version
#define MSG_TYPE(x) (x)->msg_type
#define DATA_LEN(x) (x)->data_len
#define PKT_NUM(x) (x)->pkt_num
#define RDM_ID(x) (x)->rdm_id
#define NUM_ATTR(x) (x)->num_attr
#define SRC_PORT(x) (x)->src_port
// Message types
typedef enum msg_t_ {
INTEREST,
POSITIVE_REINFORCEMENT,
NEGATIVE_REINFORCEMENT,
DATA,
EXPLORATORY_DATA,
PUSH_EXPLORATORY_DATA,
CONTROL,
REDIRECT
} diff_msg_t;
// Header structure
struct hdr_diff {
int32_t last_hop; // forwarder node id
int32_t next_hop; // next hop node id
int8_t version; // protocol version
int8_t msg_type; // message type
int16_t data_len; // data length
int32_t pkt_num; // packet number
int32_t rdm_id; // random id
int16_t num_attr; // number of attributes
int16_t src_port; // sender port id
};
#define HDR_DIFF(x) (struct hdr_diff *)(x)
#endif // !_HEADER_HH_
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