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 */