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; see the file COPYING; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #ifndef _ZEBRA_ISIS_ADJACENCY_H
26 #define _ZEBRA_ISIS_ADJACENCY_H
28 #include "isisd/isis_tlvs.h"
37 enum isis_system_type
{
47 ISIS_ADJ_INITIALIZING
,
53 * we use the following codes to give an indication _why_
54 * a specific adjacency is up or down
56 enum isis_adj_updown_reason
{
57 ISIS_ADJ_REASON_SEENSELF
,
58 ISIS_ADJ_REASON_AREA_MISMATCH
,
59 ISIS_ADJ_REASON_HOLDTIMER_EXPIRED
,
60 ISIS_ADJ_REASON_AUTH_FAILED
,
61 ISIS_ADJ_REASON_CHECKSUM_FAILED
64 #define DIS_RECORDS 8 /* keep the last 8 DIS state changes on record */
66 struct isis_dis_record
{
67 int dis
; /* is our neighbor the DIS ? */
68 time_t last_dis_change
; /* timestamp for last dis change */
73 struct isis_adjacency
{
74 uint8_t snpa
[ETH_ALEN
]; /* NeighbourSNPAAddress */
75 uint8_t sysid
[ISIS_SYS_ID_LEN
]; /* neighbourSystemIdentifier */
76 uint8_t lanid
[ISIS_SYS_ID_LEN
+ 1]; /* LAN id on bcast circuits */
77 int dischanges
[ISIS_LEVELS
]; /* how many DIS changes ? */
78 /* an array of N levels for M records */
79 struct isis_dis_record dis_record
[DIS_RECORDS
* ISIS_LEVELS
];
80 enum isis_adj_state adj_state
; /* adjacencyState */
81 enum isis_adj_usage adj_usage
; /* adjacencyUsage */
82 struct area_addr
*area_addresses
; /* areaAdressesOfNeighbour */
83 unsigned int area_address_count
;
84 struct nlpids nlpids
; /* protocols spoken ... */
85 struct in_addr
*ipv4_addresses
;
86 unsigned int ipv4_address_count
;
87 struct in_addr router_address
;
88 struct in6_addr
*ipv6_addresses
;
89 unsigned int ipv6_address_count
;
90 struct in6_addr router_address6
;
91 uint8_t prio
[ISIS_LEVELS
]; /* priorityOfNeighbour for DIS */
92 int circuit_t
; /* from hello PDU hdr */
93 int level
; /* level (1 or 2) */
94 enum isis_system_type sys_type
; /* neighbourSystemType */
95 uint16_t hold_time
; /* entryRemainingTime */
97 uint32_t last_flap
; /* last time the adj flapped */
98 enum isis_threeway_state threeway_state
;
99 uint32_t ext_circuit_id
;
100 int flaps
; /* number of adjacency flaps */
101 struct thread
*t_expire
; /* expire after hold_time */
102 struct isis_circuit
*circuit
; /* back pointer */
103 uint16_t *mt_set
; /* Topologies this adjacency is valid for */
104 unsigned int mt_count
; /* Number of entries in mt_set */
105 struct bfd_session
*bfd_session
;
108 struct isis_threeway_adj
;
110 struct isis_adjacency
*isis_adj_lookup(const uint8_t *sysid
,
112 struct isis_adjacency
*isis_adj_lookup_snpa(const uint8_t *ssnpa
,
114 struct isis_adjacency
*isis_new_adj(const uint8_t *id
, const uint8_t *snpa
,
115 int level
, struct isis_circuit
*circuit
);
116 void isis_delete_adj(void *adj
);
117 void isis_adj_process_threeway(struct isis_adjacency
*adj
,
118 struct isis_threeway_adj
*tw_adj
,
119 enum isis_adj_usage adj_usage
);
120 DECLARE_HOOK(isis_adj_state_change_hook
, (struct isis_adjacency
*adj
), (adj
))
121 void isis_adj_state_change(struct isis_adjacency
*adj
,
122 enum isis_adj_state state
, const char *reason
);
123 void isis_adj_print(struct isis_adjacency
*adj
);
124 int isis_adj_expire(struct thread
*thread
);
125 void isis_adj_print_vty(struct isis_adjacency
*adj
, struct vty
*vty
,
127 void isis_adj_build_neigh_list(struct list
*adjdb
, struct list
*list
);
128 void isis_adj_build_up_list(struct list
*adjdb
, struct list
*list
);
129 int isis_adj_usage2levels(enum isis_adj_usage usage
);
131 #endif /* ISIS_ADJACENCY_H */