ospf6d/ospf6_asbr.h

   1 /*
   2  * Copyright (C) 2001 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 along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef OSPF6_ASBR_H
  22 #define OSPF6_ASBR_H
  23
  24 /* for struct ospf6_prefix */
  25 #include "ospf6_proto.h"
  26 /* for struct ospf6_lsa */
  27 #include "ospf6_lsa.h"
  28 /* for struct ospf6_route */
  29 #include "ospf6_route.h"
  30
  31 /* Debug option */
  32 extern unsigned char conf_debug_ospf6_asbr;
  33 #define OSPF6_DEBUG_ASBR_ON() (conf_debug_ospf6_asbr = 1)
  34 #define OSPF6_DEBUG_ASBR_OFF() (conf_debug_ospf6_asbr = 0)
  35 #define IS_OSPF6_DEBUG_ASBR (conf_debug_ospf6_asbr)
  36
  37 struct ospf6_external_info {
  38         /* External route type */
  39         int type;
  40
  41         /* Originating Link State ID */
  42         uint32_t id;
  43
  44         struct in6_addr forwarding;
  45
  46         route_tag_t tag;
  47
  48         ifindex_t ifindex;
  49
  50 };
  51
  52 /* OSPF6 ASBR Summarisation */
  53 typedef enum {
  54         OSPF6_ROUTE_AGGR_NONE = 0,
  55         OSPF6_ROUTE_AGGR_ADD,
  56         OSPF6_ROUTE_AGGR_DEL,
  57         OSPF6_ROUTE_AGGR_MODIFY
  58 } ospf6_aggr_action_t;
  59
  60 #define OSPF6_EXTERNAL_AGGRT_NO_ADVERTISE 0x1
  61 #define OSPF6_EXTERNAL_AGGRT_ORIGINATED 0x2
  62
  63 #define OSPF6_EXTERNAL_RT_COUNT(aggr)    \
  64         (((struct ospf6_external_aggr_rt *)aggr)->match_extnl_hash->count)
  65
  66 struct ospf6_external_aggr_rt {
  67         /* range address and masklen */
  68         struct prefix p;
  69
  70         /* use bits for OSPF6_EXTERNAL_AGGRT_NO_ADVERTISE and
  71          * OSPF6_EXTERNAL_AGGRT_ORIGINATED
  72          */
  73         uint16_t aggrflags;
  74
  75         /* To store external metric-type */
  76         uint8_t mtype;
  77
  78         /* Route tag for summary address */
  79         route_tag_t tag;
  80
  81         /* To store aggregated metric config */
  82         int metric;
  83
  84         /* To Store the LS ID when LSA is originated */
  85         uint32_t id;
  86
  87         /* Action to be done after delay timer expiry */
  88         int action;
  89
  90         /* OSPFv3 route generated by summary address. */
  91         struct ospf6_route *route;
  92
  93         /* Hash table of matching external routes */
  94         struct hash *match_extnl_hash;
  95 };
  96
  97 /* AS-External-LSA */
  98 #define OSPF6_AS_EXTERNAL_LSA_MIN_SIZE         4U /* w/o IPv6 prefix */
  99 struct ospf6_as_external_lsa {
 100         uint32_t bits_metric;
 101
 102         struct ospf6_prefix prefix;
 103         /* followed by none or one forwarding address */
 104         /* followed by none or one external route tag */
 105         /* followed by none or one referenced LS-ID */
 106 };
 107
 108 #define OSPF6_ASBR_BIT_T  ntohl (0x01000000)
 109 #define OSPF6_ASBR_BIT_F  ntohl (0x02000000)
 110 #define OSPF6_ASBR_BIT_E  ntohl (0x04000000)
 111
 112 #define OSPF6_ASBR_METRIC(E) (ntohl ((E)->bits_metric & htonl (0x00ffffff)))
 113 #define OSPF6_ASBR_METRIC_SET(E, C)                                            \
 114         {                                                                      \
 115                 (E)->bits_metric &= htonl(0xff000000);                         \
 116                 (E)->bits_metric |= htonl(0x00ffffff) & htonl(C);              \
 117         }
 118
 119 extern void ospf6_asbr_lsa_add(struct ospf6_lsa *lsa);
 120
 121 extern void ospf6_asbr_lsa_remove(struct ospf6_lsa *lsa,
 122                                   struct ospf6_route *asbr_entry);
 123 extern void ospf6_asbr_lsentry_add(struct ospf6_route *asbr_entry,
 124                                    struct ospf6 *ospf6);
 125 extern void ospf6_asbr_lsentry_remove(struct ospf6_route *asbr_entry,
 126                                       struct ospf6 *ospf6);
 127
 128 extern int ospf6_asbr_is_asbr(struct ospf6 *o);
 129 extern void ospf6_asbr_redistribute_add(int type, ifindex_t ifindex,
 130                                         struct prefix *prefix,
 131                                         unsigned int nexthop_num,
 132                                         struct in6_addr *nexthop,
 133                                         route_tag_t tag, struct ospf6 *ospf6);
 134 extern void ospf6_asbr_redistribute_remove(int type, ifindex_t ifindex,
 135                                            struct prefix *prefix,
 136                                            struct ospf6 *ospf6);
 137
 138 extern int ospf6_redistribute_config_write(struct vty *vty,
 139                                            struct ospf6 *ospf6);
 140
 141 extern void ospf6_asbr_init(void);
 142 extern void ospf6_asbr_redistribute_disable(struct ospf6 *ospf6);
 143 extern void ospf6_asbr_redistribute_reset(struct ospf6 *ospf6);
 144 extern void ospf6_asbr_terminate(void);
 145 extern void ospf6_asbr_send_externals_to_area(struct ospf6_area *);
 146 extern void ospf6_asbr_remove_externals_from_area(struct ospf6_area *oa);
 147
 148 extern int config_write_ospf6_debug_asbr(struct vty *vty);
 149 extern int ospf6_distribute_config_write(struct vty *vty, struct ospf6 *ospf6);
 150 extern void install_element_ospf6_debug_asbr(void);
 151 extern void ospf6_asbr_update_route_ecmp_path(struct ospf6_route *old,
 152                                               struct ospf6_route *route,
 153                                               struct ospf6 *ospf6);
 154 extern void ospf6_asbr_distribute_list_update(struct ospf6 *ospf6,
 155                                               struct ospf6_redist *red);
 156 struct ospf6_redist *ospf6_redist_lookup(struct ospf6 *ospf6, int type,
 157                                          unsigned short instance);
 158 extern void ospf6_asbr_routemap_update(const char *mapname);
 159 extern struct ospf6_lsa *
 160 ospf6_as_external_lsa_originate(struct ospf6_route *route,
 161                                 struct ospf6 *ospf6);
 162 extern void ospf6_asbr_status_update(struct ospf6 *ospf6, int status);
 163
 164 int ospf6_asbr_external_rt_advertise(struct ospf6 *ospf6,
 165                                      struct prefix *p);
 166 int ospf6_external_aggr_delay_timer_set(struct ospf6 *ospf6, uint16_t interval);
 167 int ospf6_asbr_external_rt_no_advertise(struct ospf6 *ospf6,
 168                                                 struct prefix *p);
 169
 170 struct ospf6_external_aggr_rt *
 171 ospf6_external_aggr_config_lookup(struct ospf6 *ospf6, struct prefix *p);
 172
 173 int ospf6_external_aggr_config_set(struct ospf6 *ospf6, struct prefix *p,
 174                                    route_tag_t tag, int metric, int mtype);
 175
 176 int ospf6_external_aggr_config_unset(struct ospf6 *ospf6,
 177                                         struct prefix *p);
 178 void ospf6_handle_external_lsa_origination(struct ospf6 *ospf6,
 179                                                struct ospf6_route *rt,
 180                                                struct prefix *p);
 181 void ospf6_external_aggregator_free(struct ospf6_external_aggr_rt *aggr);
 182 void ospf6_unset_all_aggr_flag(struct ospf6 *ospf6);
 183 void ospf6_fill_aggr_route_details(struct ospf6 *ospf6,
 184                                    struct ospf6_external_aggr_rt *aggr);
 185 #endif /* OSPF6_ASBR_H */