1 files changed, 92 insertions, 0 deletions
diff --git a/ospfd/ospf_spf.h b/ospfd/ospf_spf.h
new file mode 100644
index 0000000..0837748
--- /dev/null
+++ b/ospfd/ospf_spf.h
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * OSPF calculation.
+ * Copyright (C) 1999 Kunihiro Ishiguro
+ */
+
+#ifndef _QUAGGA_OSPF_SPF_H
+#define _QUAGGA_OSPF_SPF_H
+
+#include "typesafe.h"
+
+/* values for vertex->type */
+#define OSPF_VERTEX_ROUTER  1  /* for a Router-LSA */
+#define OSPF_VERTEX_NETWORK 2  /* for a Network-LSA */
+
+/* values for vertex->flags */
+#define OSPF_VERTEX_PROCESSED      0x01
+
+/* The "root" is the node running the SPF calculation */
+
+PREDECL_SKIPLIST_NONUNIQ(vertex_pqueue);
+/* A router or network in an area */
+struct vertex {
+	struct vertex_pqueue_item pqi;
+	uint8_t flags;
+	uint8_t type;		/* copied from LSA header */
+	struct in_addr id;      /* copied from LSA header */
+	struct ospf_lsa *lsa_p;
+	struct lsa_header *lsa; /* Router or Network LSA */
+	uint32_t distance;      /* from root to this vertex */
+	struct list *parents;   /* list of parents in SPF tree */
+	struct list *children;  /* list of children in SPF tree*/
+};
+
+struct vertex_nexthop {
+	struct in_addr router;     /* router address to send to */
+	int lsa_pos; /* LSA position for resolving the interface */
+};
+
+struct vertex_parent {
+	struct vertex_nexthop *nexthop; /* nexthop taken on the root node */
+	struct vertex_nexthop *local_nexthop; /* local nexthop of the parent */
+	struct vertex *parent;		      /* parent vertex */
+	int backlink; /* index back to parent for router-lsa's */
+};
+
+/* What triggered the SPF ? */
+typedef enum {
+	SPF_FLAG_ROUTER_LSA_INSTALL = 1,
+	SPF_FLAG_NETWORK_LSA_INSTALL,
+	SPF_FLAG_SUMMARY_LSA_INSTALL,
+	SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL,
+	SPF_FLAG_MAXAGE,
+	SPF_FLAG_ABR_STATUS_CHANGE,
+	SPF_FLAG_ASBR_STATUS_CHANGE,
+	SPF_FLAG_CONFIG_CHANGE,
+	SPF_FLAG_GR_FINISH,
+} ospf_spf_reason_t;
+
+extern void ospf_spf_calculate_schedule(struct ospf *, ospf_spf_reason_t);
+extern void ospf_spf_calculate(struct ospf_area *area,
+			       struct ospf_lsa *root_lsa,
+			       struct route_table *new_table,
+			       struct route_table *all_rtrs,
+			       struct route_table *new_rtrs, bool is_dry_run,
+			       bool is_root_node);
+extern void ospf_spf_calculate_area(struct ospf *ospf, struct ospf_area *area,
+				    struct route_table *new_table,
+				    struct route_table *all_rtrs,
+				    struct route_table *new_rtrs);
+extern void ospf_spf_calculate_areas(struct ospf *ospf,
+				     struct route_table *new_table,
+				     struct route_table *all_rtrs,
+				     struct route_table *new_rtrs);
+extern void ospf_rtrs_free(struct route_table *);
+extern void ospf_spf_cleanup(struct vertex *spf, struct list *vertex_list);
+extern void ospf_spf_copy(struct vertex *vertex, struct list *vertex_list);
+extern void ospf_spf_remove_resource(struct vertex *vertex,
+				     struct list *vertex_list,
+				     struct protected_resource *resource);
+extern struct vertex *ospf_spf_vertex_find(struct in_addr id,
+					   struct list *vertex_list);
+extern struct vertex *ospf_spf_vertex_by_nexthop(struct vertex *root,
+						 struct in_addr *nexthop);
+extern struct vertex_parent *ospf_spf_vertex_parent_find(struct in_addr id,
+							 struct vertex *vertex);
+extern int vertex_parent_cmp(void *aa, void *bb);
+
+extern void ospf_spf_print(struct vty *vty, struct vertex *v, int i);
+extern void ospf_restart_spf(struct ospf *ospf);
+/* void ospf_spf_calculate_timer_add (); */
+#endif /* _QUAGGA_OSPF_SPF_H */