isisd/isis_route.h

   1 /*
   2  * IS-IS Rout(e)ing protocol               - isis_route.h
   3  *
   4  * Copyright (C) 2001,2002   Sampo Saaristo
   5  *                           Tampere University of Technology
   6  *                           Institute of Communications Engineering
   7  *
   8  *                                         based on ../ospf6d/ospf6_route.[ch]
   9  *                                         by Yasuhiro Ohara
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public Licenseas published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  * more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; see the file COPYING; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24  */
  25 #ifndef _ZEBRA_ISIS_ROUTE_H
  26 #define _ZEBRA_ISIS_ROUTE_H
  27
  28 #include "lib/nexthop.h"
  29
  30 struct isis_nexthop {
  31         ifindex_t ifindex;
  32         int family;
  33         union g_addr ip;
  34         uint8_t sysid[ISIS_SYS_ID_LEN];
  35         struct isis_sr_psid_info sr;
  36         struct mpls_label_stack *label_stack;
  37 };
  38
  39 struct isis_route_info {
  40 #define ISIS_ROUTE_FLAG_ACTIVE       0x01  /* active route for the prefix */
  41 #define ISIS_ROUTE_FLAG_ZEBRA_SYNCED 0x02  /* set when route synced to zebra */
  42 #define ISIS_ROUTE_FLAG_ZEBRA_RESYNC 0x04  /* set when route needs to sync */
  43         uint8_t flag;
  44         uint32_t cost;
  45         uint32_t depth;
  46         struct isis_sr_psid_info sr;
  47         struct isis_sr_psid_info sr_previous;
  48         struct list *nexthops;
  49         struct isis_route_info *backup;
  50 };
  51
  52 DECLARE_HOOK(isis_route_update_hook,
  53              (struct isis_area * area, struct prefix *prefix,
  54               struct isis_route_info *route_info),
  55              (area, prefix, route_info));
  56
  57 void isis_nexthop_delete(struct isis_nexthop *nexthop);
  58 void adjinfo2nexthop(int family, struct list *nexthops,
  59                      struct isis_adjacency *adj, struct isis_sr_psid_info *sr,
  60                      struct mpls_label_stack *label_stack);
  61 struct isis_route_info *
  62 isis_route_create(struct prefix *prefix, struct prefix_ipv6 *src_p,
  63                   uint32_t cost, uint32_t depth, struct isis_sr_psid_info *sr,
  64                   struct list *adjacencies, bool allow_ecmp,
  65                   struct isis_area *area, struct route_table *table);
  66 void isis_route_delete(struct isis_area *area, struct route_node *rode,
  67                        struct route_table *table);
  68
  69 /* Walk the given table and install new routes to zebra and remove old ones.
  70  * route status is tracked using ISIS_ROUTE_FLAG_ACTIVE */
  71 void isis_route_verify_table(struct isis_area *area, struct route_table *table,
  72                              struct route_table *table_backup);
  73
  74 /* Same as isis_route_verify_table, but merge L1 and L2 routes before */
  75 void isis_route_verify_merge(struct isis_area *area,
  76                              struct route_table *level1_table,
  77                              struct route_table *level1_table_backup,
  78                              struct route_table *level2_table,
  79                              struct route_table *level2_table_backup);
  80
  81 /* Unset ISIS_ROUTE_FLAG_ACTIVE on all routes. Used before running spf. */
  82 void isis_route_invalidate_table(struct isis_area *area,
  83                                  struct route_table *table);
  84
  85 /* Cleanup route node when freeing routing table. */
  86 void isis_route_node_cleanup(struct route_table *table,
  87                              struct route_node *node);
  88
  89 #endif /* _ZEBRA_ISIS_ROUTE_H */