diff options
Diffstat (limited to 'isisd/isis_adjacency.h')
| -rw-r--r-- | isisd/isis_adjacency.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/isisd/isis_adjacency.h b/isisd/isis_adjacency.h new file mode 100644 index 0000000..dc18105 --- /dev/null +++ b/isisd/isis_adjacency.h @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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 + * + */ + +#ifndef _ZEBRA_ISIS_ADJACENCY_H +#define _ZEBRA_ISIS_ADJACENCY_H + +#include "isisd/isis_tlvs.h" + +DECLARE_MTYPE(ISIS_ADJACENCY_INFO); + +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 bfd_session; +struct isis_area; + +struct isis_adjacency { + uint8_t snpa[ETH_ALEN]; /* NeighbourSNPAAddress */ + uint8_t sysid[ISIS_SYS_ID_LEN]; /* neighbourSystemIdentifier */ + uint8_t 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 iso_address *area_addresses; /* areaAdressesOfNeighbour */ + unsigned int area_address_count; + struct nlpids nlpids; /* protocols spoken ... */ + struct in_addr *ipv4_addresses; + unsigned int ipv4_address_count; + struct in_addr router_address; + struct in6_addr *ll_ipv6_addrs; /* Link local IPv6 neighbor address */ + unsigned int ll_ipv6_count; + struct in6_addr *global_ipv6_addrs; /* Global IPv6 neighbor address */ + unsigned int global_ipv6_count; + struct in6_addr router_address6; + uint8_t 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 */ + uint16_t hold_time; /* entryRemainingTime */ + time_t last_upd; + time_t last_flap; /* last time the adj flapped */ + enum isis_threeway_state threeway_state; + uint32_t ext_circuit_id; + int flaps; /* number of adjacency flaps */ + struct event *t_expire; /* expire after hold_time */ + struct isis_circuit *circuit; /* back pointer */ + uint16_t *mt_set; /* Topologies this adjacency is valid for */ + unsigned int mt_count; /* Number of entries in mt_set */ + struct bfd_session_params *bfd_session; + struct list *adj_sids; /* Segment Routing Adj-SIDs. */ + uint32_t snmp_idx; + struct listnode *snmp_list_node; + + struct list *srv6_endx_sids; /* SRv6 End.X SIDs. */ +}; + +struct isis_threeway_adj; + +struct isis_adjacency *isis_adj_lookup(const uint8_t *sysid, + struct list *adjdb); +struct isis_adjacency *isis_adj_lookup_snpa(const uint8_t *ssnpa, + struct list *adjdb); +struct isis_adjacency *isis_adj_find(const struct isis_area *area, int level, + const uint8_t *sysid); +struct isis_adjacency *isis_new_adj(const uint8_t *id, const uint8_t *snpa, + int level, struct isis_circuit *circuit); +void isis_delete_adj(void *adj); +void isis_adj_process_threeway(struct isis_adjacency *adj, + struct isis_threeway_adj *tw_adj, + enum isis_adj_usage adj_usage); +DECLARE_HOOK(isis_adj_state_change_hook, (struct isis_adjacency *adj), (adj)); +DECLARE_HOOK(isis_adj_ip_enabled_hook, + (struct isis_adjacency * adj, int family, bool global), + (adj, family, global)); +DECLARE_HOOK(isis_adj_ip_disabled_hook, + (struct isis_adjacency * adj, int family, bool global), + (adj, family, global)); +void isis_log_adj_change(struct isis_adjacency *adj, + enum isis_adj_state old_state, + enum isis_adj_state new_state, const char *reason); +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); +const char *isis_adj_yang_state(enum isis_adj_state state); +void isis_adj_expire(struct event *thread); +void isis_adj_print_vty(struct isis_adjacency *adj, struct vty *vty, + char detail); +void isis_adj_print_json(struct isis_adjacency *adj, struct json_object *json, + 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); +int isis_adj_usage2levels(enum isis_adj_usage usage); +void isis_bfd_startup_timer(struct event *thread); +const char *isis_adj_name(const struct isis_adjacency *adj); +#endif /* ISIS_ADJACENCY_H */ |