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; see the file COPYING; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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_UNKNOWN,
  48   ISIS_ADJ_INITIALIZING,
  49   ISIS_ADJ_UP,
  50   ISIS_ADJ_DOWN
  51 };
  52
  53 /*
  54  * we use the following codes to give an indication _why_
  55  * a specific adjacency is up or down
  56  */
  57 enum isis_adj_updown_reason
  58 {
  59   ISIS_ADJ_REASON_SEENSELF,
  60   ISIS_ADJ_REASON_AREA_MISMATCH,
  61   ISIS_ADJ_REASON_HOLDTIMER_EXPIRED,
  62   ISIS_ADJ_REASON_AUTH_FAILED,
  63   ISIS_ADJ_REASON_CHECKSUM_FAILED
  64 };
  65
  66 #define DIS_RECORDS 8   /* keep the last 8 DIS state changes on record */
  67
  68 struct isis_dis_record
  69 {
  70   int dis;                      /* is our neighbor the DIS ? */
  71   time_t last_dis_change;       /* timestamp for last dis change */
  72 };
  73
  74 struct isis_adjacency
  75 {
  76   u_char snpa[ETH_ALEN];                /* NeighbourSNPAAddress */
  77   u_char sysid[ISIS_SYS_ID_LEN];        /* neighbourSystemIdentifier */
  78   u_char lanid[ISIS_SYS_ID_LEN + 1];    /* LAN id on bcast circuits */
  79   int dischanges[ISIS_LEVELS];          /* how many DIS changes ? */
  80   /* an array of N levels for M records */
  81   struct isis_dis_record dis_record[DIS_RECORDS * ISIS_LEVELS];
  82   enum isis_adj_state adj_state;        /* adjacencyState */
  83   enum isis_adj_usage adj_usage;        /* adjacencyUsage */
  84   struct list *area_addrs;              /* areaAdressesOfNeighbour */
  85   struct nlpids nlpids;                 /* protocols spoken ... */
  86   struct list *ipv4_addrs;
  87   struct in_addr router_address;
  88   struct list *ipv6_addrs;
  89   struct in6_addr router_address6;
  90   u_char prio[ISIS_LEVELS];     /* priorityOfNeighbour for DIS */
  91   int circuit_t;                /* from hello PDU hdr */
  92   int level;                    /* level (1 or 2) */
  93   enum isis_system_type sys_type;       /* neighbourSystemType */
  94   u_int16_t hold_time;          /* entryRemainingTime */
  95   u_int32_t last_upd;
  96   u_int32_t last_flap;          /* last time the adj flapped */
  97   int flaps;                    /* number of adjacency flaps  */
  98   struct thread *t_expire;      /* expire after hold_time  */
  99   struct isis_circuit *circuit; /* back pointer */
 100   uint16_t *mt_set;             /* Topologies this adjacency is valid for */
 101   unsigned int mt_count;              /* Number of entries in mt_set */
 102 };
 103
 104 struct isis_adjacency *isis_adj_lookup (const u_char * sysid, struct list *adjdb);
 105 struct isis_adjacency *isis_adj_lookup_snpa (const u_char * ssnpa,
 106                                              struct list *adjdb);
 107 struct isis_adjacency *isis_new_adj (const u_char * id, const u_char * snpa, int level,
 108                                      struct isis_circuit *circuit);
 109 void isis_delete_adj (void *adj);
 110 void isis_adj_state_change (struct isis_adjacency *adj,
 111                             enum isis_adj_state state, const char *reason);
 112 void isis_adj_print (struct isis_adjacency *adj);
 113 int isis_adj_expire (struct thread *thread);
 114 void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty, char detail);
 115 void isis_adj_build_neigh_list (struct list *adjdb, struct list *list);
 116 void isis_adj_build_up_list (struct list *adjdb, struct list *list);
 117 int isis_adj_usage2levels(enum isis_adj_usage usage);
 118
 119 #endif /* ISIS_ADJACENCY_H */