isisd/isis_spf.h

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_spf.h
   3  *                             IS-IS Shortest Path First algorithm
   4  *
   5  * Copyright (C) 2001,2002   Sampo Saaristo
   6  *                           Tampere University of Technology
   7  *                           Institute of Communications Engineering
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public Licenseas published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; see the file COPYING; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #ifndef _ZEBRA_ISIS_SPF_H
  25 #define _ZEBRA_ISIS_SPF_H
  26
  27 #include "isisd/isis_lfa.h"
  28
  29 struct isis_spftree;
  30
  31 enum spf_type {
  32         SPF_TYPE_FORWARD = 1,
  33         SPF_TYPE_REVERSE,
  34         SPF_TYPE_TI_LFA,
  35 };
  36
  37 struct isis_spf_adj {
  38         uint8_t id[ISIS_SYS_ID_LEN + 1];
  39         struct isis_adjacency *adj;
  40         uint32_t metric;
  41         struct isis_ext_subtlvs *subtlvs;
  42         struct {
  43                 uint8_t desig_is_id[ISIS_SYS_ID_LEN + 1];
  44                 struct isis_lsp *lsp_pseudo;
  45         } lan;
  46         uint8_t flags;
  47 #define F_ISIS_SPF_ADJ_BROADCAST 0x01
  48 #define F_ISIS_SPF_ADJ_OLDMETRIC 0x02
  49 };
  50
  51 struct isis_spftree *isis_spftree_new(struct isis_area *area,
  52                                       struct lspdb_head *lspdb,
  53                                       const uint8_t *sysid, int level,
  54                                       enum spf_tree_id tree_id,
  55                                       enum spf_type type, uint8_t flags);
  56 void isis_spf_invalidate_routes(struct isis_spftree *tree);
  57 void isis_spf_verify_routes(struct isis_area *area,
  58                             struct isis_spftree **trees);
  59 void isis_spftree_del(struct isis_spftree *spftree);
  60 void spftree_area_init(struct isis_area *area);
  61 void spftree_area_del(struct isis_area *area);
  62 struct isis_lsp *isis_root_system_lsp(struct lspdb_head *lspdb,
  63                                       const uint8_t *sysid);
  64 #define isis_spf_schedule(area, level) \
  65         _isis_spf_schedule((area), (level), __func__, \
  66                            __FILE__, __LINE__)
  67 int _isis_spf_schedule(struct isis_area *area, int level,
  68                        const char *func, const char *file, int line);
  69 void isis_print_spftree(struct vty *vty, struct isis_spftree *spftree);
  70 void isis_print_routes(struct vty *vty, struct isis_spftree *spftree,
  71                        bool prefix_sid, bool backup);
  72 void isis_spf_init(void);
  73 void isis_spf_print(struct isis_spftree *spftree, struct vty *vty);
  74 void isis_run_spf(struct isis_spftree *spftree);
  75 struct isis_spftree *isis_run_hopcount_spf(struct isis_area *area,
  76                                            uint8_t *sysid,
  77                                            struct isis_spftree *spftree);
  78
  79 #endif /* _ZEBRA_ISIS_SPF_H */