isisd/isis_route.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * IS-IS Rout(e)ing protocol               - isis_route.h
   4  *
   5  * Copyright (C) 2001,2002   Sampo Saaristo
   6  *                           Tampere University of Technology
   7  *                           Institute of Communications Engineering
   8  *
   9  *                                         based on ../ospf6d/ospf6_route.[ch]
  10  *                                         by Yasuhiro Ohara
  11  */
  12 #ifndef _ZEBRA_ISIS_ROUTE_H
  13 #define _ZEBRA_ISIS_ROUTE_H
  14
  15 #include "lib/nexthop.h"
  16
  17 struct isis_nexthop {
  18         ifindex_t ifindex;
  19         int family;
  20         union g_addr ip;
  21         uint8_t sysid[ISIS_SYS_ID_LEN];
  22         struct isis_sr_psid_info sr;
  23         struct mpls_label_stack *label_stack;
  24 };
  25
  26 struct isis_route_info {
  27 #define ISIS_ROUTE_FLAG_ACTIVE       0x01  /* active route for the prefix */
  28 #define ISIS_ROUTE_FLAG_ZEBRA_SYNCED 0x02  /* set when route synced to zebra */
  29 #define ISIS_ROUTE_FLAG_ZEBRA_RESYNC 0x04  /* set when route needs to sync */
  30         uint8_t flag;
  31         uint32_t cost;
  32         uint32_t depth;
  33         struct isis_sr_psid_info sr;
  34         struct isis_sr_psid_info sr_previous;
  35         struct list *nexthops;
  36         struct isis_route_info *backup;
  37 };
  38
  39 DECLARE_HOOK(isis_route_update_hook,
  40              (struct isis_area * area, struct prefix *prefix,
  41               struct isis_route_info *route_info),
  42              (area, prefix, route_info));
  43
  44 void isis_nexthop_delete(struct isis_nexthop *nexthop);
  45 void adjinfo2nexthop(int family, struct list *nexthops,
  46                      struct isis_adjacency *adj, struct isis_sr_psid_info *sr,
  47                      struct mpls_label_stack *label_stack);
  48 struct isis_route_info *
  49 isis_route_create(struct prefix *prefix, struct prefix_ipv6 *src_p,
  50                   uint32_t cost, uint32_t depth, struct isis_sr_psid_info *sr,
  51                   struct list *adjacencies, bool allow_ecmp,
  52                   struct isis_area *area, struct route_table *table);
  53 void isis_route_delete(struct isis_area *area, struct route_node *rode,
  54                        struct route_table *table);
  55
  56 /* Walk the given table and install new routes to zebra and remove old ones.
  57  * route status is tracked using ISIS_ROUTE_FLAG_ACTIVE */
  58 void isis_route_verify_table(struct isis_area *area, struct route_table *table,
  59                              struct route_table *table_backup);
  60
  61 /* Same as isis_route_verify_table, but merge L1 and L2 routes before */
  62 void isis_route_verify_merge(struct isis_area *area,
  63                              struct route_table *level1_table,
  64                              struct route_table *level1_table_backup,
  65                              struct route_table *level2_table,
  66                              struct route_table *level2_table_backup);
  67
  68 /* Unset ISIS_ROUTE_FLAG_ACTIVE on all routes. Used before running spf. */
  69 void isis_route_invalidate_table(struct isis_area *area,
  70                                  struct route_table *table);
  71
  72 /* Cleanup route node when freeing routing table. */
  73 void isis_route_node_cleanup(struct route_table *table,
  74                              struct route_node *node);
  75
  76 void isis_route_switchover_nexthop(struct isis_area *area,
  77                                    struct route_table *table, int family,
  78                                    union g_addr *nexthop_addr,
  79                                    ifindex_t ifindex);
  80
  81 #endif /* _ZEBRA_ISIS_ROUTE_H */