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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* IS-IS Rout(e)ing protocol - isis_spf.h
* IS-IS Shortest Path First algorithm
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*/
#ifndef _ZEBRA_ISIS_SPF_H
#define _ZEBRA_ISIS_SPF_H
#include "isisd/isis_lfa.h"
struct isis_spftree;
enum spf_type {
SPF_TYPE_FORWARD = 1,
SPF_TYPE_REVERSE,
SPF_TYPE_RLFA,
SPF_TYPE_TI_LFA,
};
struct isis_spf_adj {
uint8_t id[ISIS_SYS_ID_LEN + 1];
struct isis_adjacency *adj;
uint32_t metric;
struct isis_ext_subtlvs *subtlvs;
struct isis_lsp *lsp;
struct {
uint8_t desig_is_id[ISIS_SYS_ID_LEN + 1];
} lan;
uint8_t flags;
#define F_ISIS_SPF_ADJ_BROADCAST 0x01
#define F_ISIS_SPF_ADJ_OLDMETRIC 0x02
#define F_ISIS_SPF_ADJ_METRIC_INFINITY 0x04
};
struct isis_spftree *isis_spftree_new(struct isis_area *area,
struct lspdb_head *lspdb,
const uint8_t *sysid, int level,
enum spf_tree_id tree_id,
enum spf_type type, uint8_t flags);
struct isis_vertex *isis_spf_prefix_sid_lookup(struct isis_spftree *spftree,
struct isis_prefix_sid *psid);
void isis_spf_invalidate_routes(struct isis_spftree *tree);
void isis_spf_verify_routes(struct isis_area *area,
struct isis_spftree **trees);
void isis_spf_switchover_routes(struct isis_area *area,
struct isis_spftree **trees, int family,
union g_addr *nexthop_ip, ifindex_t ifindex,
int level);
void isis_spftree_del(struct isis_spftree *spftree);
void spftree_area_init(struct isis_area *area);
void spftree_area_del(struct isis_area *area);
struct isis_lsp *isis_root_system_lsp(struct lspdb_head *lspdb,
const uint8_t *sysid);
#define isis_spf_schedule(area, level) \
_isis_spf_schedule((area), (level), __func__, \
__FILE__, __LINE__)
int _isis_spf_schedule(struct isis_area *area, int level,
const char *func, const char *file, int line);
void isis_print_spftree(struct vty *vty, struct isis_spftree *spftree);
void isis_print_routes(struct vty *vty, struct isis_spftree *spftree,
bool prefix_sid, bool backup);
void isis_spf_init(void);
void isis_spf_print(struct isis_spftree *spftree, struct vty *vty);
void isis_spf_print_json(struct isis_spftree *spftree,
struct json_object *json);
void isis_run_spf(struct isis_spftree *spftree);
struct isis_spftree *isis_run_hopcount_spf(struct isis_area *area,
uint8_t *sysid,
struct isis_spftree *spftree);
void isis_spf_timer_free(void *run);
#endif /* _ZEBRA_ISIS_SPF_H */
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