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/*
* 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
*
* 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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _ZEBRA_ISIS_SPF_H
#define _ZEBRA_ISIS_SPF_H
enum vertextype {
VTYPE_PSEUDO_IS = 1,
VTYPE_PSEUDO_TE_IS,
VTYPE_NONPSEUDO_IS,
VTYPE_NONPSEUDO_TE_IS,
VTYPE_ES,
VTYPE_IPREACH_INTERNAL,
VTYPE_IPREACH_EXTERNAL,
VTYPE_IPREACH_TE,
VTYPE_IP6REACH_INTERNAL,
VTYPE_IP6REACH_EXTERNAL
};
#define VTYPE_IS(t) ((t) >= VTYPE_PSEUDO_IS && (t) <= VTYPE_NONPSEUDO_TE_IS)
#define VTYPE_ES(t) ((t) == VTYPE_ES)
#define VTYPE_IP(t) ((t) >= VTYPE_IPREACH_INTERNAL && (t) <= VTYPE_IP6REACH_EXTERNAL)
/*
* Triple <N, d(N), {Adj(N)}>
*/
struct isis_vertex {
enum vertextype type;
union {
u_char id[ISIS_SYS_ID_LEN + 1];
struct prefix prefix;
} N;
u_int32_t d_N; /* d(N) Distance from this IS */
u_int16_t depth; /* The depth in the imaginary tree */
struct list *Adj_N; /* {Adj(N)} next hop or neighbor list */
struct list *parents; /* list of parents for ECMP */
struct list *children; /* list of children used for tree dump */
};
struct isis_spftree {
struct list *paths; /* the SPT */
struct list *tents; /* TENT */
struct isis_area *area; /* back pointer to area */
unsigned int runcount; /* number of runs since uptime */
time_t last_run_timestamp; /* last run timestamp for scheduling */
time_t last_run_duration; /* last run duration in msec */
uint16_t mtid;
int family;
int level;
};
struct isis_spftree *isis_spftree_new(struct isis_area *area);
void isis_spftree_del(struct isis_spftree *spftree);
void spftree_area_init(struct isis_area *area);
void spftree_area_del(struct isis_area *area);
void spftree_area_adj_del(struct isis_area *area, struct isis_adjacency *adj);
int isis_spf_schedule(struct isis_area *area, int level);
void isis_spf_cmds_init(void);
#endif /* _ZEBRA_ISIS_SPF_H */
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