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 */
71 struct isis_adjacency
{
72 uint8_t snpa
[ETH_ALEN
]; /* NeighbourSNPAAddress */
73 uint8_t sysid
[ISIS_SYS_ID_LEN
]; /* neighbourSystemIdentifier */
74 uint8_t lanid
[ISIS_SYS_ID_LEN
+ 1]; /* LAN id on bcast circuits */
75 int dischanges
[ISIS_LEVELS
]; /* how many DIS changes ? */
76 /* an array of N levels for M records */
77 struct isis_dis_record dis_record
[DIS_RECORDS
* ISIS_LEVELS
];
78 enum isis_adj_state adj_state
; /* adjacencyState */
79 enum isis_adj_usage adj_usage
; /* adjacencyUsage */
80 struct area_addr
*area_addresses
; /* areaAdressesOfNeighbour */
81 unsigned int area_address_count
;
82 struct nlpids nlpids
; /* protocols spoken ... */
83 struct in_addr
*ipv4_addresses
;
84 unsigned int ipv4_address_count
;
85 struct in_addr router_address
;
86 struct in6_addr
*ipv6_addresses
;
87 unsigned int ipv6_address_count
;
88 struct in6_addr router_address6
;
89 uint8_t prio
[ISIS_LEVELS
]; /* priorityOfNeighbour for DIS */
90 int circuit_t
; /* from hello PDU hdr */
91 int level
; /* level (1 or 2) */
92 enum isis_system_type sys_type
; /* neighbourSystemType */
93 uint16_t hold_time
; /* entryRemainingTime */
95 uint32_t last_flap
; /* last time the adj flapped */
96 enum isis_threeway_state threeway_state
;
97 uint32_t ext_circuit_id
;
98 int flaps
; /* number of adjacency flaps */
99 struct thread
*t_expire
; /* expire after hold_time */
100 struct isis_circuit
*circuit
; /* back pointer */
101 uint16_t *mt_set
; /* Topologies this adjacency is valid for */
102 unsigned int mt_count
; /* Number of entries in mt_set */
105 struct isis_threeway_adj
;
107 struct isis_adjacency
*isis_adj_lookup(const uint8_t *sysid
,
109 struct isis_adjacency
*isis_adj_lookup_snpa(const uint8_t *ssnpa
,
111 struct isis_adjacency
*isis_new_adj(const uint8_t *id
, const uint8_t *snpa
,
112 int level
, struct isis_circuit
*circuit
);
113 void isis_delete_adj(void *adj
);
114 void isis_adj_process_threeway(struct isis_adjacency
*adj
,
115 struct isis_threeway_adj
*tw_adj
,
116 enum isis_adj_usage adj_usage
);
117 void isis_adj_state_change(struct isis_adjacency
*adj
,
118 enum isis_adj_state state
, const char *reason
);
119 void isis_adj_print(struct isis_adjacency
*adj
);
120 int isis_adj_expire(struct thread
*thread
);
121 void isis_adj_print_vty(struct isis_adjacency
*adj
, struct vty
*vty
,
123 void isis_adj_build_neigh_list(struct list
*adjdb
, struct list
*list
);
124 void isis_adj_build_up_list(struct list
*adjdb
, struct list
*list
);
125 int isis_adj_usage2levels(enum isis_adj_usage usage
);
127 #endif /* ISIS_ADJACENCY_H */