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/*
* IS-IS Rout(e)ing protocol - isis_adjacency.h
* IS-IS adjacency handling
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _ZEBRA_ISIS_ADJACENCY_H
#define _ZEBRA_ISIS_ADJACENCY_H
enum isis_adj_usage
{
ISIS_ADJ_NONE,
ISIS_ADJ_LEVEL1,
ISIS_ADJ_LEVEL2,
ISIS_ADJ_LEVEL1AND2
};
enum isis_system_type
{
ISIS_SYSTYPE_UNKNOWN,
ISIS_SYSTYPE_ES,
ISIS_SYSTYPE_IS,
ISIS_SYSTYPE_L1_IS,
ISIS_SYSTYPE_L2_IS
};
enum isis_adj_state
{
ISIS_ADJ_UNKNOWN,
ISIS_ADJ_INITIALIZING,
ISIS_ADJ_UP,
ISIS_ADJ_DOWN
};
/*
* we use the following codes to give an indication _why_
* a specific adjacency is up or down
*/
enum isis_adj_updown_reason
{
ISIS_ADJ_REASON_SEENSELF,
ISIS_ADJ_REASON_AREA_MISMATCH,
ISIS_ADJ_REASON_HOLDTIMER_EXPIRED,
ISIS_ADJ_REASON_AUTH_FAILED,
ISIS_ADJ_REASON_CHECKSUM_FAILED
};
#define DIS_RECORDS 8 /* keep the last 8 DIS state changes on record */
struct isis_dis_record
{
int dis; /* is our neighbor the DIS ? */
time_t last_dis_change; /* timestamp for last dis change */
};
struct isis_adjacency
{
u_char snpa[ETH_ALEN]; /* NeighbourSNPAAddress */
u_char sysid[ISIS_SYS_ID_LEN]; /* neighbourSystemIdentifier */
u_char lanid[ISIS_SYS_ID_LEN + 1]; /* LAN id on bcast circuits */
int dischanges[ISIS_LEVELS]; /* how many DIS changes ? */
/* an array of N levels for M records */
struct isis_dis_record dis_record[DIS_RECORDS * ISIS_LEVELS];
enum isis_adj_state adj_state; /* adjacencyState */
enum isis_adj_usage adj_usage; /* adjacencyUsage */
struct list *area_addrs; /* areaAdressesOfNeighbour */
struct nlpids nlpids; /* protocols spoken ... */
struct list *ipv4_addrs;
struct in_addr router_address;
#ifdef HAVE_IPV6
struct list *ipv6_addrs;
struct in6_addr router_address6;
#endif /* HAVE_IPV6 */
u_char prio[ISIS_LEVELS]; /* priorityOfNeighbour for DIS */
int circuit_t; /* from hello PDU hdr */
int level; /* level (1 or 2) */
enum isis_system_type sys_type; /* neighbourSystemType */
u_int16_t hold_time; /* entryRemainingTime */
u_int32_t last_upd;
u_int32_t last_flap; /* last time the adj flapped */
int flaps; /* number of adjacency flaps */
struct thread *t_expire; /* expire after hold_time */
struct isis_circuit *circuit; /* back pointer */
};
struct isis_adjacency *isis_adj_lookup (u_char * sysid, struct list *adjdb);
struct isis_adjacency *isis_adj_lookup_snpa (u_char * ssnpa,
struct list *adjdb);
struct isis_adjacency *isis_new_adj (u_char * id, u_char * snpa, int level,
struct isis_circuit *circuit);
void isis_delete_adj (void *adj);
void isis_adj_state_change (struct isis_adjacency *adj,
enum isis_adj_state state, const char *reason);
void isis_adj_print (struct isis_adjacency *adj);
int isis_adj_expire (struct thread *thread);
void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty, char detail);
void isis_adj_build_neigh_list (struct list *adjdb, struct list *list);
void isis_adj_build_up_list (struct list *adjdb, struct list *list);
#endif /* ISIS_ADJACENCY_H */
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