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_algo[SR_ALGORITHM_COUNT];
  34         struct isis_sr_psid_info sr_algo_previous[SR_ALGORITHM_COUNT];
  35         struct list *nexthops;
  36         struct isis_route_info *backup;
  37 };
  38
  39 struct isis_route_table_info {
  40         uint8_t algorithm;
  41 };
  42
  43 DECLARE_HOOK(isis_route_update_hook,
  44              (struct isis_area * area, struct prefix *prefix,
  45               struct isis_route_info *route_info),
  46              (area, prefix, route_info));
  47
  48 void isis_nexthop_delete(struct isis_nexthop *nexthop);
  49 void adjinfo2nexthop(int family, struct list *nexthops,
  50                      struct isis_adjacency *adj, struct isis_sr_psid_info *sr,
  51                      struct mpls_label_stack *label_stack);
  52 struct isis_route_info *
  53 isis_route_create(struct prefix *prefix, struct prefix_ipv6 *src_p,
  54                   uint32_t cost, uint32_t depth, struct isis_sr_psid_info *sr,
  55                   struct list *adjacencies, bool allow_ecmp,
  56                   struct isis_area *area, struct route_table *table);
  57 void isis_route_delete(struct isis_area *area, struct route_node *rode,
  58                        struct route_table *table);
  59
  60 /* Walk the given table and install new routes to zebra and remove old ones.
  61  * route status is tracked using ISIS_ROUTE_FLAG_ACTIVE */
  62 void isis_route_verify_table(struct isis_area *area, struct route_table *table,
  63                              struct route_table *table_backup, int tree);
  64
  65 /* Same as isis_route_verify_table, but merge L1 and L2 routes before */
  66 void isis_route_verify_merge(struct isis_area *area,
  67                              struct route_table *level1_table,
  68                              struct route_table *level1_table_backup,
  69                              struct route_table *level2_table,
  70                              struct route_table *level2_table_backup, int tree);
  71
  72 /* Unset ISIS_ROUTE_FLAG_ACTIVE on all routes. Used before running spf. */
  73 void isis_route_invalidate_table(struct isis_area *area,
  74                                  struct route_table *table);
  75
  76 /* Cleanup route node when freeing routing table. */
  77 void isis_route_node_cleanup(struct route_table *table,
  78                              struct route_node *node);
  79
  80
  81 void isis_route_switchover_nexthop(struct isis_area *area,
  82                                    struct route_table *table, int family,
  83                                    union g_addr *nexthop_addr,
  84                                    ifindex_t ifindex);
  85
  86 struct isis_route_table_info *isis_route_table_info_alloc(uint8_t algorithm);
  87 void isis_route_table_info_free(void *info);
  88 uint8_t isis_route_table_algorithm(const struct route_table *table);
  89
  90 #endif /* _ZEBRA_ISIS_ROUTE_H */