1/* 2 * IS-IS Rout(e)ing protocol - isis_adjacency.h 3 * IS-IS adjacency handling 4 * 5 * Copyright (C) 2001,2002 Sampo Saaristo 6 * Tampere University of Technology 7 * Institute of Communications Engineering 8 * 9 * 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) 13 * any later version. 14 * 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 18 * more details. 19 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. 23 */ 24 25#ifndef _ZEBRA_ISIS_ADJACENCY_H 26#define _ZEBRA_ISIS_ADJACENCY_H 27 28enum isis_adj_usage 29{ 30 ISIS_ADJ_NONE, 31 ISIS_ADJ_LEVEL1, 32 ISIS_ADJ_LEVEL2, 33 ISIS_ADJ_LEVEL1AND2 34}; 35 36enum isis_system_type 37{ 38 ISIS_SYSTYPE_UNKNOWN, 39 ISIS_SYSTYPE_ES, 40 ISIS_SYSTYPE_IS, 41 ISIS_SYSTYPE_L1_IS, 42 ISIS_SYSTYPE_L2_IS 43}; 44 45enum isis_adj_state 46{ 47 ISIS_ADJ_UNKNOWN, 48 ISIS_ADJ_INITIALIZING, 49 ISIS_ADJ_UP, 50 ISIS_ADJ_DOWN 51}; 52 53/* 54 * we use the following codes to give an indication _why_ 55 * a specific adjacency is up or down 56 */ 57enum isis_adj_updown_reason 58{ 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 64}; 65 66#define DIS_RECORDS 8 /* keep the last 8 DIS state changes on record */ 67 68struct isis_dis_record 69{ 70 int dis; /* is our neighbor the DIS ? */ 71 time_t last_dis_change; /* timestamp for last dis change */ 72}; 73 74struct isis_adjacency 75{ 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; 88#ifdef HAVE_IPV6 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 */ 97 u_int32_t last_upd; 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 */ 102}; 103 104struct isis_adjacency *isis_adj_lookup (u_char * sysid, struct list *adjdb); 105struct isis_adjacency *isis_adj_lookup_snpa (u_char * ssnpa, 106 struct list *adjdb); 107struct isis_adjacency *isis_new_adj (u_char * id, u_char * snpa, int level, 108 struct isis_circuit *circuit); 109void isis_delete_adj (void *adj); 110void isis_adj_state_change (struct isis_adjacency *adj, 111 enum isis_adj_state state, const char *reason); 112void isis_adj_print (struct isis_adjacency *adj); 113int isis_adj_expire (struct thread *thread); 114void isis_adj_print_vty (struct isis_adjacency *adj, struct vty *vty, char detail); 115void isis_adj_build_neigh_list (struct list *adjdb, struct list *list); 116void isis_adj_build_up_list (struct list *adjdb, struct list *list); 117 118#endif /* ISIS_ADJACENCY_H */ 119