lms.h
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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 */