2 * IS-IS Rout(e)ing protocol - isis_adjacency.h
3 * IS-IS adjacency handling
5 * Copyright (C) 2001,2002 Sampo Saaristo
6 * Tampere University of Technology
7 * Institute of Communications Engineering
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)
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
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.
25 #ifndef _ZEBRA_ISIS_ADJACENCY_H
26 #define _ZEBRA_ISIS_ADJACENCY_H
48 ISIS_ADJ_INITIALIZING,
54 * we use the following codes to give an indication _why_
55 * a specific adjacency is up or down
57 enum isis_adj_updown_reason
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
66 #define DIS_RECORDS 8 /* keep the last 8 DIS state changes on record */
68 struct isis_dis_record
70 int dis; /* is our neighbor the DIS ? */
71 time_t last_dis_change; /* timestamp for last dis change */
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;
89 struct list *ipv6_addrs;
90 struct in6_addr router_address6;
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 */
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 */
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,
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);
118 #endif /* ISIS_ADJACENCY_H */