tora_dest.h

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00001 /* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
00002 /*
00003  * Copyright (c) 1997 Regents of the University of California.
00004  * All rights reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  * 1. Redistributions of source code must retain the above copyright
00010  *    notice, this list of conditions and the following disclaimer.
00011  * 2. Redistributions in binary form must reproduce the above copyright
00012  *    notice, this list of conditions and the following disclaimer in the
00013  *    documentation and/or other materials provided with the distribution.
00014  * 3. All advertising materials mentioning features or use of this software
00015  *    must display the following acknowledgement:
00016  *      This product includes software developed by the Computer Systems
00017  *      Engineering Group at Lawrence Berkeley Laboratory.
00018  * 4. Neither the name of the University nor of the Laboratory may be used
00019  *    to endorse or promote products derived from this software without
00020  *    specific prior written permission.
00021  *
00022  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
00023  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00024  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00025  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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00027  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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00031  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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00033  */
00034 /* Ported from CMU/Monarch's code*/
00035 
00036 #ifndef __tora_dest_h__
00037 #define __tora_dest_h__
00038 
00039 class TORANeighbor;
00040 class toraAgent;
00041 
00042 LIST_HEAD(tn_head, TORANeighbor);
00043 
00044 class TORADest {
00045     friend class toraAgent;
00046 public:
00047     TORADest(nsaddr_t id, Agent *a);
00048 
00049     TORANeighbor*   nb_add(nsaddr_t id);
00050     int     nb_del(nsaddr_t id);
00051     TORANeighbor*   nb_find(nsaddr_t id);
00052 
00053     void        update_height_nb(TORANeighbor* tn,
00054                      struct hdr_tora_upd *uh);
00055     void        update_height(double TAU, nsaddr_t OID,
00056                     int R, int DELTA, nsaddr_t ID);
00057 
00058     int     nb_check_same_ref(void);
00059 
00060     /*
00061      *  Finds the minimum height neighbor whose lnk_stat is DN.
00062      */
00063     TORANeighbor*   nb_find_next_hop();
00064 
00065     TORANeighbor*   nb_find_height(int R);
00066     TORANeighbor*   nb_find_max_height(void);
00067     TORANeighbor*   nb_find_min_height(int R);
00068     TORANeighbor*   nb_find_min_nonnull_height(Height *h);
00069 
00070     void        dump(void);
00071 
00072 private:
00073     LIST_ENTRY(TORADest) link;
00074 
00075     nsaddr_t    index;      // IP address of destination
00076     Height      height;     // 5-tuple height of this node
00077     int     rt_req;     // route required flag
00078     double      time_upd;   // time last UPD packet was sent
00079 
00080     double      time_tx_qry;    // time sent last QUERY
00081     double      time_rt_req;    // time rt_req last set - JGB 
00082 
00083     tn_head     nblist;     // List of neighbors.
00084     int     num_active; // # active links
00085     int     num_down;   // # down stream links
00086     int     num_up;     // # up stream links
00087 
00088         toraAgent     *agent;
00089 };
00090 
00091 #endif // __tora_dest_h__
00092 

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