ospf_spf.h 2.5 KB

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  1. /*
  2. * OSPF calculation.
  3. * Copyright (C) 1999 Kunihiro Ishiguro
  4. *
  5. * This file is part of GNU Zebra.
  6. *
  7. * GNU Zebra is free software; you can redistribute it and/or modify it
  8. * under the terms of the GNU General Public License as published by the
  9. * Free Software Foundation; either version 2, or (at your option) any
  10. * later version.
  11. *
  12. * GNU Zebra is distributed in the hope that it will be useful, but
  13. * WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15. * General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU General Public License
  18. * along with GNU Zebra; see the file COPYING. If not, write to the Free
  19. * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  20. * 02111-1307, USA.
  21. */
  22. #ifndef _QUAGGA_OSPF_SPF_H
  23. #define _QUAGGA_OSPF_SPF_H
  24. /* values for vertex->type */
  25. #define OSPF_VERTEX_ROUTER 1 /* for a Router-LSA */
  26. #define OSPF_VERTEX_NETWORK 2 /* for a Network-LSA */
  27. /* values for vertex->flags */
  28. #define OSPF_VERTEX_PROCESSED 0x01
  29. /* The "root" is the node running the SPF calculation */
  30. /* A router or network in an area */
  31. struct vertex
  32. {
  33. u_char flags;
  34. u_char type; /* copied from LSA header */
  35. struct in_addr id; /* copied from LSA header */
  36. struct lsa_header *lsa; /* Router or Network LSA */
  37. int *stat; /* Link to LSA status. */
  38. u_int32_t distance; /* from root to this vertex */
  39. struct list *parents; /* list of parents in SPF tree */
  40. struct list *children; /* list of children in SPF tree*/
  41. };
  42. /* A nexthop taken on the root node to get to this (parent) vertex */
  43. struct vertex_nexthop
  44. {
  45. struct ospf_interface *oi; /* output intf on root node */
  46. struct in_addr router; /* router address to send to */
  47. };
  48. struct vertex_parent
  49. {
  50. struct vertex_nexthop *nexthop; /* link to nexthop info for this parent */
  51. struct vertex *parent; /* parent vertex */
  52. int backlink; /* index back to parent for router-lsa's */
  53. };
  54. /* What triggered the SPF ? */
  55. typedef enum {
  56. SPF_FLAG_ROUTER_LSA_INSTALL = 1,
  57. SPF_FLAG_NETWORK_LSA_INSTALL,
  58. SPF_FLAG_SUMMARY_LSA_INSTALL,
  59. SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL,
  60. SPF_FLAG_MAXAGE,
  61. SPF_FLAG_ABR_STATUS_CHANGE,
  62. SPF_FLAG_ASBR_STATUS_CHANGE,
  63. SPF_FLAG_CONFIG_CHANGE,
  64. } ospf_spf_reason_t;
  65. extern void ospf_spf_calculate_schedule (struct ospf *, ospf_spf_reason_t);
  66. extern void ospf_rtrs_free (struct route_table *);
  67. /* void ospf_spf_calculate_timer_add (); */
  68. #endif /* _QUAGGA_OSPF_SPF_H */