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   int                              dis; /* is our neighbor the DIS ? */          time_t               last_dis_change; /* timestamp for last dis change */
  69 };
  70
  71 struct isis_adjacency{
  72   u_char snpa[ETH_ALEN];           /* NeighbourSNPAAddress */
  73   u_char sysid[ISIS_SYS_ID_LEN];   /* neighbourSystemIdentifier */
  74   u_char lanid[ISIS_SYS_ID_LEN+1]; /* LAN id on bcast circuits */
  75   int dischanges[ISIS_LEVELS];     /* how many DIS changes ?*/
  76   /* an array of N levels for M records */
  77   struct isis_dis_record  dis_record[DIS_RECORDS * ISIS_LEVELS];
  78   enum isis_adj_state adj_state;  /* adjacencyState */
  79   enum isis_adj_usage adj_usage;  /* adjacencyUsage */
  80   struct list *area_addrs;        /* areaAdressesOfNeighbour */
  81   struct nlpids nlpids;           /* protocols spoken ... */
  82   struct list *ipv4_addrs;
  83 #ifdef HAVE_IPV6
  84   struct list *ipv6_addrs;
  85 #endif /* HAVE_IPV6 */
  86   u_char prio[ISIS_LEVELS];        /* priorityOfNeighbour for DIS*/
  87   int circuit_t;                   /* from hello PDU hdr */
  88   int level;                       /* level (1 or 2) */
  89   enum  isis_system_type sys_type; /* neighbourSystemType */
  90   u_int16_t hold_time;             /* entryRemainingTime */
  91   u_int32_t last_upd;
  92   u_int32_t last_flap;             /* last time the adj flapped */
  93   int flaps;                       /* number of adjacency flaps  */
  94   struct thread *t_expire;         /* expire after hold_time  */
  95   struct isis_circuit *circuit;    /* back pointer */
  96 };
  97
  98
  99 struct isis_adjacency *isis_adj_lookup (u_char *sysid, struct list *adjdb);
 100 struct isis_adjacency *isis_adj_lookup_snpa (u_char *ssnpa,
 101                                              struct list *adjdb);
 102 struct isis_adjacency *isis_new_adj (u_char *id, u_char *snpa, int level,
 103                                      struct isis_circuit *circuit);
 104 void isis_delete_adj (struct isis_adjacency *adj, struct list *adjdb);
 105 void isis_adj_state_change (struct isis_adjacency *adj,
 106                             enum isis_adj_state state, char *reason);
 107 void isis_adj_print (struct isis_adjacency *adj);
 108 int  isis_adj_expire (struct thread *thread);
 109 void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty);
 110 void isis_adj_print_vty_detail (struct isis_adjacency *adj, struct vty *vty);
 111 void isis_adj_print_vty_extensive (struct isis_adjacency *adj,
 112                                    struct vty *vty);
 113 void isis_adj_p2p_print_vty (struct isis_adjacency *adj, struct vty *vty);
 114 void isis_adj_p2p_print_vty_detail (struct isis_adjacency *adj,
 115                                     struct vty *vty);
 116 void isis_adj_p2p_print_vty_extensive (struct isis_adjacency *adj,
 117                                        struct vty *vty);
 118
 119 void isis_adj_build_neigh_list (struct list *adjdb, struct list *list);
 120 void isis_adj_build_up_list (struct list *adjdb, struct list *list);
 121 void isis_adjdb_iterate (struct list *adjdb,
 122                          void (*func)(struct isis_adjacency*,
 123                                       void *), void *arg);
 124
 125 #endif /* ISIS_ADJACENCY_H */
 126