ospf6d/ospf6_spf.h

   1 /*
   2  * Copyright (C) 2003 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #ifndef OSPF6_SPF_H
  23 #define OSPF6_SPF_H
  24
  25 #include "ospf6_top.h"
  26
  27 /* Debug option */
  28 extern unsigned char conf_debug_ospf6_spf;
  29 #define OSPF6_DEBUG_SPF_PROCESS   0x01
  30 #define OSPF6_DEBUG_SPF_TIME      0x02
  31 #define OSPF6_DEBUG_SPF_DATABASE  0x04
  32 #define OSPF6_DEBUG_SPF_ON(level) \
  33   (conf_debug_ospf6_spf |= (level))
  34 #define OSPF6_DEBUG_SPF_OFF(level) \
  35   (conf_debug_ospf6_spf &= ~(level))
  36 #define IS_OSPF6_DEBUG_SPF(level) \
  37   (conf_debug_ospf6_spf & OSPF6_DEBUG_SPF_ ## level)
  38
  39 /* Transit Vertex */
  40 struct ospf6_vertex
  41 {
  42   /* type of this vertex */
  43   u_int8_t type;
  44
  45   /* Vertex Identifier */
  46   struct prefix vertex_id;
  47
  48   /* Identifier String */
  49   char name[128];
  50
  51   /* Associated Area */
  52   struct ospf6_area *area;
  53
  54   /* Associated LSA */
  55   struct ospf6_lsa *lsa;
  56
  57   /* Distance from Root (i.e. Cost) */
  58   u_int32_t cost;
  59
  60   /* Router hops to this node */
  61   u_char hops;
  62
  63   /* nexthops to this node */
  64   struct ospf6_nexthop nexthop[OSPF6_MULTI_PATH_LIMIT];
  65
  66   /* capability bits */
  67   u_char capability;
  68
  69   /* Optional capabilities */
  70   u_char options[3];
  71
  72   /* For tree display */
  73   struct ospf6_vertex *parent;
  74   struct list *child_list;
  75 };
  76
  77 #define OSPF6_VERTEX_TYPE_ROUTER  0x01
  78 #define OSPF6_VERTEX_TYPE_NETWORK 0x02
  79 #define VERTEX_IS_TYPE(t, v) \
  80   ((v)->type == OSPF6_VERTEX_TYPE_ ## t ? 1 : 0)
  81
  82 /* What triggered the SPF? */
  83 #define OSPF6_SPF_FLAGS_ROUTER_LSA_ADDED         (1 << 0)
  84 #define OSPF6_SPF_FLAGS_ROUTER_LSA_REMOVED       (1 << 1)
  85 #define OSPF6_SPF_FLAGS_NETWORK_LSA_ADDED        (1 << 2)
  86 #define OSPF6_SPF_FLAGS_NETWORK_LSA_REMOVED      (1 << 3)
  87 #define OSPF6_SPF_FLAGS_LINK_LSA_ADDED           (1 << 4)
  88 #define OSPF6_SPF_FLAGS_LINK_LSA_REMOVED         (1 << 5)
  89 #define OSPF6_SPF_FLAGS_ROUTER_LSA_ORIGINATED    (1 << 6)
  90 #define OSPF6_SPF_FLAGS_NETWORK_LSA_ORIGINATED   (1 << 7)
  91
  92 static inline void
  93 ospf6_set_spf_reason (struct ospf6* ospf, unsigned int reason)
  94 {
  95   ospf->spf_reason |= reason;
  96 }
  97
  98 static inline void
  99 ospf6_reset_spf_reason (struct ospf6 *ospf)
 100 {
 101   ospf->spf_reason = 0;
 102 }
 103
 104 static inline unsigned int
 105 ospf6_lsadd_to_spf_reason (struct ospf6_lsa *lsa)
 106 {
 107   unsigned int reason = 0;
 108
 109   switch (ntohs (lsa->header->type))
 110     {
 111     case OSPF6_LSTYPE_ROUTER:
 112       reason = OSPF6_SPF_FLAGS_ROUTER_LSA_ADDED;
 113       break;
 114     case OSPF6_LSTYPE_NETWORK:
 115       reason = OSPF6_SPF_FLAGS_NETWORK_LSA_ADDED;
 116       break;
 117     case OSPF6_LSTYPE_LINK:
 118       reason = OSPF6_SPF_FLAGS_LINK_LSA_ADDED;
 119       break;
 120     default:
 121       break;
 122     }
 123   return (reason);
 124 }
 125
 126 static inline unsigned int
 127 ospf6_lsremove_to_spf_reason (struct ospf6_lsa *lsa)
 128 {
 129   unsigned int reason = 0;
 130
 131   switch (ntohs (lsa->header->type))
 132     {
 133     case OSPF6_LSTYPE_ROUTER:
 134       reason = OSPF6_SPF_FLAGS_ROUTER_LSA_REMOVED;
 135       break;
 136     case OSPF6_LSTYPE_NETWORK:
 137       reason = OSPF6_SPF_FLAGS_NETWORK_LSA_REMOVED;
 138       break;
 139     case OSPF6_LSTYPE_LINK:
 140       reason = OSPF6_SPF_FLAGS_LINK_LSA_REMOVED;
 141       break;
 142     default:
 143       break;
 144     }
 145   return (reason);
 146 }
 147
 148 extern void ospf6_spf_table_finish (struct ospf6_route_table *result_table);
 149 extern void ospf6_spf_calculation (u_int32_t router_id,
 150                                    struct ospf6_route_table *result_table,
 151                                    struct ospf6_area *oa);
 152 extern void ospf6_spf_schedule (struct ospf6 *ospf, unsigned int reason);
 153
 154 extern void ospf6_spf_display_subtree (struct vty *vty, const char *prefix,
 155                                        int rest, struct ospf6_vertex *v);
 156
 157 extern void ospf6_spf_config_write (struct vty *vty);
 158 extern int config_write_ospf6_debug_spf (struct vty *vty);
 159 extern void install_element_ospf6_debug_spf (void);
 160 extern void ospf6_spf_init (void);
 161 extern void ospf6_spf_reason_string (unsigned int reason, char *buf, int size);
 162
 163 #endif /* OSPF6_SPF_H */
 164