isisd/isis_adjacency.h

   1 /*
   2  * IS-IS Rout(e)ing protocol - isis_adjacency.h
   3  *                             IS-IS adjacency handling
   4  *
   5  * Copyright (C) 2001,2002   Sampo Saaristo
   6  *                           Tampere University of Technology
   7  *                           Institute of Communications Engineering
   8  *
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public Licenseas published by the Free
  12  * Software Foundation; either version 2 of the License, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18  * more details.
  19
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24
  25 #ifndef _ZEBRA_ISIS_ADJACENCY_H
  26 #define _ZEBRA_ISIS_ADJACENCY_H
  27
  28 enum isis_adj_usage
  29 {
  30   ISIS_ADJ_NONE,
  31   ISIS_ADJ_LEVEL1,
  32   ISIS_ADJ_LEVEL2,
  33   ISIS_ADJ_LEVEL1AND2
  34 };
  35
  36 enum isis_system_type
  37 {
  38   ISIS_SYSTYPE_UNKNOWN,
  39   ISIS_SYSTYPE_ES,
  40   ISIS_SYSTYPE_IS,
  41   ISIS_SYSTYPE_L1_IS,
  42   ISIS_SYSTYPE_L2_IS
  43 };
  44
  45 enum isis_adj_state
  46 {
  47   ISIS_ADJ_INITIALIZING,
  48   ISIS_ADJ_UP,
  49   ISIS_ADJ_DOWN
  50 };
  51
  52 /*
  53  * we use the following codes to give an indication _why_
  54  * a specific adjacency is up or down
  55  */
  56 enum isis_adj_updown_reason
  57 {
  58   ISIS_ADJ_REASON_SEENSELF,
  59   ISIS_ADJ_REASON_AREA_MISMATCH,
  60   ISIS_ADJ_REASON_HOLDTIMER_EXPIRED,
  61   ISIS_ADJ_REASON_AUTH_FAILED,
  62   ISIS_ADJ_REASON_CHECKSUM_FAILED
  63 };
  64
  65 #define DIS_RECORDS 8   /* keep the last 8 DIS state changes on record */
  66
  67 struct isis_dis_record
  68 {
  69   int dis;                      /* is our neighbor the DIS ? */
  70   time_t last_dis_change;       /* timestamp for last dis change */
  71 };
  72
  73 struct isis_adjacency
  74 {
  75   u_char snpa[ETH_ALEN];                /* NeighbourSNPAAddress */
  76   u_char sysid[ISIS_SYS_ID_LEN];        /* neighbourSystemIdentifier */
  77   u_char lanid[ISIS_SYS_ID_LEN + 1];    /* LAN id on bcast circuits */
  78   int dischanges[ISIS_LEVELS];          /* how many DIS changes ? */
  79   /* an array of N levels for M records */
  80   struct isis_dis_record dis_record[DIS_RECORDS * ISIS_LEVELS];
  81   enum isis_adj_state adj_state;        /* adjacencyState */
  82   enum isis_adj_usage adj_usage;        /* adjacencyUsage */
  83   struct list *area_addrs;              /* areaAdressesOfNeighbour */
  84   struct nlpids nlpids;                 /* protocols spoken ... */
  85   struct list *ipv4_addrs;
  86 #ifdef HAVE_IPV6
  87   struct list *ipv6_addrs;
  88 #endif                          /* HAVE_IPV6 */
  89   u_char prio[ISIS_LEVELS];     /* priorityOfNeighbour for DIS */
  90   int circuit_t;                /* from hello PDU hdr */
  91   int level;                    /* level (1 or 2) */
  92   enum isis_system_type sys_type;       /* neighbourSystemType */
  93   u_int16_t hold_time;          /* entryRemainingTime */
  94   u_int32_t last_upd;
  95   u_int32_t last_flap;          /* last time the adj flapped */
  96   int flaps;                    /* number of adjacency flaps  */
  97   struct thread *t_expire;      /* expire after hold_time  */
  98   struct isis_circuit *circuit; /* back pointer */
  99 };
 100
 101 struct isis_adjacency *isis_adj_lookup (u_char * sysid, struct list *adjdb);
 102 struct isis_adjacency *isis_adj_lookup_snpa (u_char * ssnpa,
 103                                              struct list *adjdb);
 104 struct isis_adjacency *isis_new_adj (u_char * id, u_char * snpa, int level,
 105                                      struct isis_circuit *circuit);
 106 void isis_delete_adj (struct isis_adjacency *adj, struct list *adjdb);
 107 void isis_adj_state_change (struct isis_adjacency *adj,
 108                             enum isis_adj_state state, const char *reason);
 109 void isis_adj_print (struct isis_adjacency *adj);
 110 int isis_adj_expire (struct thread *thread);
 111 void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty);
 112 void isis_adj_print_vty_detail (struct isis_adjacency *adj, struct vty *vty);
 113 void isis_adj_print_vty_extensive (struct isis_adjacency *adj,
 114                                    struct vty *vty);
 115 void isis_adj_p2p_print_vty (struct isis_adjacency *adj, struct vty *vty);
 116 void isis_adj_p2p_print_vty_detail (struct isis_adjacency *adj,
 117                                     struct vty *vty);
 118 void isis_adj_p2p_print_vty_extensive (struct isis_adjacency *adj,
 119                                        struct vty *vty);
 120
 121 void isis_adj_build_neigh_list (struct list *adjdb, struct list *list);
 122 void isis_adj_build_up_list (struct list *adjdb, struct list *list);
 123 void isis_adjdb_iterate (struct list *adjdb,
 124                          void (*func) (struct isis_adjacency *,
 125                                        void *), void *arg);
 126
 127 #endif /* ISIS_ADJACENCY_H */