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Annotation of embedaddon/quagga/isisd/isis_adjacency.h, revision 1.1.1.3

1.1       misho       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: {
1.1.1.2   misho      47:   ISIS_ADJ_UNKNOWN,
1.1       misho      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;
1.1.1.2   misho      87:   struct in_addr router_address;
1.1       misho      88: #ifdef HAVE_IPV6
                     89:   struct list *ipv6_addrs;
1.1.1.2   misho      90:   struct in6_addr router_address6;
1.1       misho      91: #endif                         /* HAVE_IPV6 */
                     92:   u_char prio[ISIS_LEVELS];    /* priorityOfNeighbour for DIS */
                     93:   int circuit_t;               /* from hello PDU hdr */
                     94:   int level;                   /* level (1 or 2) */
                     95:   enum isis_system_type sys_type;      /* neighbourSystemType */
                     96:   u_int16_t hold_time;         /* entryRemainingTime */
                     97:   u_int32_t last_upd;
                     98:   u_int32_t last_flap;         /* last time the adj flapped */
                     99:   int flaps;                   /* number of adjacency flaps  */
                    100:   struct thread *t_expire;     /* expire after hold_time  */
                    101:   struct isis_circuit *circuit;        /* back pointer */
                    102: };
                    103: 
1.1.1.3 ! misho     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,
1.1       misho     106:                                             struct list *adjdb);
1.1.1.3 ! misho     107: struct isis_adjacency *isis_new_adj (const u_char * id, const u_char * snpa, int level,
1.1       misho     108:                                     struct isis_circuit *circuit);
1.1.1.2   misho     109: void isis_delete_adj (void *adj);
1.1       misho     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);
1.1.1.2   misho     114: void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty, char detail);
1.1       misho     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: 
                    118: #endif /* ISIS_ADJACENCY_H */