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128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/*
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* IS-IS Rout(e)ing protocol - isis_adjacency.h
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* IS-IS adjacency handling
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*
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* Copyright (C) 2001,2002 Sampo Saaristo
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* Tampere University of Technology
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* Institute of Communications Engineering
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public Licenseas published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _ZEBRA_ISIS_ADJACENCY_H
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#define _ZEBRA_ISIS_ADJACENCY_H
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enum isis_adj_usage
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{
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ISIS_ADJ_NONE,
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ISIS_ADJ_LEVEL1,
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ISIS_ADJ_LEVEL2,
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ISIS_ADJ_LEVEL1AND2
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};
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enum isis_system_type
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{
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ISIS_SYSTYPE_UNKNOWN,
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ISIS_SYSTYPE_ES,
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ISIS_SYSTYPE_IS,
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ISIS_SYSTYPE_L1_IS,
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ISIS_SYSTYPE_L2_IS
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};
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enum isis_adj_state
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{
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ISIS_ADJ_INITIALIZING,
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ISIS_ADJ_UP,
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ISIS_ADJ_DOWN
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};
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/*
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* we use the following codes to give an indication _why_
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* a specific adjacency is up or down
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*/
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enum isis_adj_updown_reason
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{
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ISIS_ADJ_REASON_SEENSELF,
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ISIS_ADJ_REASON_AREA_MISMATCH,
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ISIS_ADJ_REASON_HOLDTIMER_EXPIRED,
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ISIS_ADJ_REASON_AUTH_FAILED,
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ISIS_ADJ_REASON_CHECKSUM_FAILED
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};
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#define DIS_RECORDS 8 /* keep the last 8 DIS state changes on record */
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struct isis_dis_record
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{
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int dis; /* is our neighbor the DIS ? */
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time_t last_dis_change; /* timestamp for last dis change */
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};
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struct isis_adjacency
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{
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u_char snpa[ETH_ALEN]; /* NeighbourSNPAAddress */
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u_char sysid[ISIS_SYS_ID_LEN]; /* neighbourSystemIdentifier */
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u_char lanid[ISIS_SYS_ID_LEN + 1]; /* LAN id on bcast circuits */
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int dischanges[ISIS_LEVELS]; /* how many DIS changes ? */
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/* an array of N levels for M records */
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struct isis_dis_record dis_record[DIS_RECORDS * ISIS_LEVELS];
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enum isis_adj_state adj_state; /* adjacencyState */
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enum isis_adj_usage adj_usage; /* adjacencyUsage */
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struct list *area_addrs; /* areaAdressesOfNeighbour */
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struct nlpids nlpids; /* protocols spoken ... */
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struct list *ipv4_addrs;
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#ifdef HAVE_IPV6
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struct list *ipv6_addrs;
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#endif /* HAVE_IPV6 */
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u_char prio[ISIS_LEVELS]; /* priorityOfNeighbour for DIS */
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int circuit_t; /* from hello PDU hdr */
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int level; /* level (1 or 2) */
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enum isis_system_type sys_type; /* neighbourSystemType */
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u_int16_t hold_time; /* entryRemainingTime */
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u_int32_t last_upd;
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u_int32_t last_flap; /* last time the adj flapped */
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int flaps; /* number of adjacency flaps */
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struct thread *t_expire; /* expire after hold_time */
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struct isis_circuit *circuit; /* back pointer */
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};
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struct isis_adjacency *isis_adj_lookup (u_char * sysid, struct list *adjdb);
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struct isis_adjacency *isis_adj_lookup_snpa (u_char * ssnpa,
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struct list *adjdb);
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struct isis_adjacency *isis_new_adj (u_char * id, u_char * snpa, int level,
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struct isis_circuit *circuit);
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void isis_delete_adj (struct isis_adjacency *adj, struct list *adjdb);
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void isis_adj_state_change (struct isis_adjacency *adj,
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enum isis_adj_state state, const char *reason);
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void isis_adj_print (struct isis_adjacency *adj);
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int isis_adj_expire (struct thread *thread);
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void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty);
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void isis_adj_print_vty_detail (struct isis_adjacency *adj, struct vty *vty);
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void isis_adj_print_vty_extensive (struct isis_adjacency *adj,
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struct vty *vty);
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void isis_adj_p2p_print_vty (struct isis_adjacency *adj, struct vty *vty);
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void isis_adj_p2p_print_vty_detail (struct isis_adjacency *adj,
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struct vty *vty);
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void isis_adj_p2p_print_vty_extensive (struct isis_adjacency *adj,
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struct vty *vty);
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void isis_adj_build_neigh_list (struct list *adjdb, struct list *list);
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void isis_adj_build_up_list (struct list *adjdb, struct list *list);
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void isis_adjdb_iterate (struct list *adjdb,
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void (*func) (struct isis_adjacency *,
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void *), void *arg);
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#endif /* ISIS_ADJACENCY_H */
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