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/*
* lms.h
* Copyright (C) 2001 by the University of Southern California
* $Id: lms.h,v 1.3 2005/08/25 18:58:07 johnh 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.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module 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 module 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 module
* 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.
*
*/
/*
* Light-Weight Multicast Services (LMS), Reliable Multicast
*
* lms.h
*
* This holds the packet header structures, and packet type constants for
* the LMS implementation.
*
* Christos Papadopoulos.
* christos@isi.edu
*/
#ifndef lms_h
#define lms_h
class LmsAgent;
#include "node.h"
#include "packet.h"
#define LMS_NOADDR -1
#define LMS_NOPORT -1
#define LMS_NOIFACE -99
#define LMS_INFINITY 1000000
/*
* PT_LMS packet types
*/
#define LMS_SRC_REFRESH 1
#define LMS_REFRESH 2
#define LMS_LEAVE 3
#define LMS_REQ 4
#define LMS_DMCAST 5
#define LMS_SETUP 6
#define LMS_SPM 7
#define LMS_LINKS 8
/*
* LMS header
*/
struct hdr_lms {
int type_; // packet type
int ttl_; // time-to-live
int cost_; // cost advertisements for LMS_REFRESH
nsaddr_t from_; // real source of packet for DMCASTs
nsaddr_t src_; // original source of mcast packet
nsaddr_t group_; // mcast group
nsaddr_t tp_addr_; // turning point address
int tp_port_; // turning point port id
int tp_iface_; // turning point interface
int lo_, hi_; // range of lost packets
double ts_; // timestamp for RTT estimation
static int offset_;
inline static int& offset() { return offset_; }
inline static hdr_lms* access(Packet* p) {
return (hdr_lms*)p->access(offset_);
}
/* per-field member functions */
int& type () { return type_; }
nsaddr_t& from () { return from_; }
nsaddr_t& src () { return src_; }
nsaddr_t& tp_addr () { return tp_addr_; }
nsaddr_t& tp_port () { return (nsaddr_t&) tp_port_; }
nsaddr_t& group () { return group_; }
};
struct lms_ctl {
int hop_cnt_; // hop counter (similar to ttl)
int cost_; // cost advertisements for LMS_REFRESH
nsaddr_t tp_addr_; // turning point address
nsaddr_t tp_port_; // turning point port id
ns_addr_t downstream_lms_;// needed when in incrDeployment
int tp_iface_; // turning point interface
int nak_lo_;
int nak_hi_; // range of lost packets
double ts_; // timestamp
};
struct lms_nak {
int nak_lo_;
int nak_hi_;
int nak_seqn_;
int dup_cnt_; // num of dup requests for each NAK
packet_t t;
int datsize;
};
struct lms_rdl {
int seqn_;
double ts_;
struct lms_rdl *next_;
};
struct lms_spm {
int spm_seqno_;
nsaddr_t spm_path_;
double spm_ts_;
};
#endif /* end ifndef lms_h */
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