00001 00002 /* 00003 * lms.h 00004 * Copyright (C) 2001 by the University of Southern California 00005 * $Id: lms.h,v 1.3 2005/08/25 18:58:07 johnh Exp $ 00006 * 00007 * This program is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU General Public License, 00009 * version 2, as published by the Free Software Foundation. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License along 00017 * with this program; if not, write to the Free Software Foundation, Inc., 00018 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 00019 * 00020 * 00021 * The copyright of this module includes the following 00022 * linking-with-specific-other-licenses addition: 00023 * 00024 * In addition, as a special exception, the copyright holders of 00025 * this module give you permission to combine (via static or 00026 * dynamic linking) this module with free software programs or 00027 * libraries that are released under the GNU LGPL and with code 00028 * included in the standard release of ns-2 under the Apache 2.0 00029 * license or under otherwise-compatible licenses with advertising 00030 * requirements (or modified versions of such code, with unchanged 00031 * license). You may copy and distribute such a system following the 00032 * terms of the GNU GPL for this module and the licenses of the 00033 * other code concerned, provided that you include the source code of 00034 * that other code when and as the GNU GPL requires distribution of 00035 * source code. 00036 * 00037 * Note that people who make modified versions of this module 00038 * are not obligated to grant this special exception for their 00039 * modified versions; it is their choice whether to do so. The GNU 00040 * General Public License gives permission to release a modified 00041 * version without this exception; this exception also makes it 00042 * possible to release a modified version which carries forward this 00043 * exception. 00044 * 00045 */ 00046 00047 /* 00048 * Light-Weight Multicast Services (LMS), Reliable Multicast 00049 * 00050 * lms.h 00051 * 00052 * This holds the packet header structures, and packet type constants for 00053 * the LMS implementation. 00054 * 00055 * Christos Papadopoulos. 00056 * christos@isi.edu 00057 */ 00058 00059 #ifndef lms_h 00060 #define lms_h 00061 00062 class LmsAgent; 00063 00064 #include "node.h" 00065 #include "packet.h" 00066 00067 00068 #define LMS_NOADDR -1 00069 #define LMS_NOPORT -1 00070 #define LMS_NOIFACE -99 00071 #define LMS_INFINITY 1000000 00072 00073 /* 00074 * PT_LMS packet types 00075 */ 00076 #define LMS_SRC_REFRESH 1 00077 #define LMS_REFRESH 2 00078 #define LMS_LEAVE 3 00079 #define LMS_REQ 4 00080 #define LMS_DMCAST 5 00081 #define LMS_SETUP 6 00082 #define LMS_SPM 7 00083 #define LMS_LINKS 8 00084 00085 /* 00086 * LMS header 00087 */ 00088 struct hdr_lms { 00089 int type_; // packet type 00090 int ttl_; // time-to-live 00091 int cost_; // cost advertisements for LMS_REFRESH 00092 nsaddr_t from_; // real source of packet for DMCASTs 00093 nsaddr_t src_; // original source of mcast packet 00094 nsaddr_t group_; // mcast group 00095 nsaddr_t tp_addr_; // turning point address 00096 int tp_port_; // turning point port id 00097 int tp_iface_; // turning point interface 00098 int lo_, hi_; // range of lost packets 00099 double ts_; // timestamp for RTT estimation 00100 00101 static int offset_; 00102 inline static int& offset() { return offset_; } 00103 inline static hdr_lms* access(Packet* p) { 00104 return (hdr_lms*)p->access(offset_); 00105 } 00106 00107 /* per-field member functions */ 00108 int& type () { return type_; } 00109 nsaddr_t& from () { return from_; } 00110 nsaddr_t& src () { return src_; } 00111 nsaddr_t& tp_addr () { return tp_addr_; } 00112 nsaddr_t& tp_port () { return (nsaddr_t&) tp_port_; } 00113 nsaddr_t& group () { return group_; } 00114 }; 00115 00116 struct lms_ctl { 00117 int hop_cnt_; // hop counter (similar to ttl) 00118 int cost_; // cost advertisements for LMS_REFRESH 00119 nsaddr_t tp_addr_; // turning point address 00120 nsaddr_t tp_port_; // turning point port id 00121 ns_addr_t downstream_lms_;// needed when in incrDeployment 00122 int tp_iface_; // turning point interface 00123 int nak_lo_; 00124 int nak_hi_; // range of lost packets 00125 double ts_; // timestamp 00126 }; 00127 00128 struct lms_nak { 00129 int nak_lo_; 00130 int nak_hi_; 00131 int nak_seqn_; 00132 int dup_cnt_; // num of dup requests for each NAK 00133 packet_t t; 00134 int datsize; 00135 }; 00136 00137 struct lms_rdl { 00138 int seqn_; 00139 double ts_; 00140 struct lms_rdl *next_; 00141 }; 00142 00143 struct lms_spm { 00144 int spm_seqno_; 00145 nsaddr_t spm_path_; 00146 double spm_ts_; 00147 }; 00148 00149 #endif /* end ifndef lms_h */