--- /dev/null
+/*
+ * BIRD Internet Routing Daemon -- Network prefix storage
+ *
+ * (c) 1998--2000 Martin Mares <mj@ucw.cz>
+ * (c) 2022 Maria Matejka <mq@jmq.cz>
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_LIB_FIB_H_
+#define _BIRD_LIB_FIB_H_
+
+/*
+ * BIRD FIBs are generic data structure for storing network prefixes.
+ * Also used for the master routing table. Currently implemented as
+ * a hash table.
+ *
+ * Available operations:
+ * - insertion of new entry
+ * - deletion of entry
+ * - searching for entry by network prefix
+ * - asynchronous retrieval of fib contents
+ */
+
+struct fib;
+
+struct fib_node {
+ struct fib_node *next; /* Next in hash chain */
+ struct fib_iterator *readers; /* List of readers of this node */
+ net_addr addr[0];
+};
+
+struct fib_iterator { /* See lib/slists.h for an explanation */
+ struct fib_iterator *prev, *next; /* Must be synced with struct fib_node! */
+ byte efef; /* 0xff to distinguish between iterator and node */
+ byte pad[3];
+ struct fib_node *node; /* Or NULL if freshly merged */
+ uint hash;
+};
+
+typedef void (*fib_init_fn)(struct fib *, void *);
+
+struct fib {
+ pool *fib_pool; /* Pool holding all our data */
+ slab *fib_slab; /* Slab holding all fib nodes */
+ struct fib_node **hash_table; /* Node hash table */
+ uint hash_size; /* Number of hash table entries (a power of two) */
+ uint hash_order; /* Binary logarithm of hash_size */
+ uint hash_shift; /* 32 - hash_order */
+ uint addr_type; /* Type of address data stored in fib (NET_*) */
+ uint node_size; /* FIB node size, 0 for nonuniform */
+ uint node_offset; /* Offset of fib_node struct inside of user data */
+ uint entries; /* Number of entries */
+ uint entries_min, entries_max; /* Entry count limits (else start rehashing) */
+ fib_init_fn init; /* Constructor */
+};
+
+static inline void * fib_node_to_user(struct fib *f, struct fib_node *e)
+{ return e ? (void *) ((char *) e - f->node_offset) : NULL; }
+
+static inline struct fib_node * fib_user_to_node(struct fib *f, void *e)
+{ return e ? (void *) ((char *) e + f->node_offset) : NULL; }
+
+void fib_init(struct fib *f, pool *p, uint addr_type, uint node_size, uint node_offset, uint hash_order, fib_init_fn init);
+void *fib_find(struct fib *, const net_addr *); /* Find or return NULL if doesn't exist */
+void *fib_get_chain(struct fib *f, const net_addr *a); /* Find first node in linked list from hash table */
+void *fib_get(struct fib *, const net_addr *); /* Find or create new if nonexistent */
+void *fib_route(struct fib *, const net_addr *); /* Longest-match routing lookup */
+void fib_delete(struct fib *, void *); /* Remove fib entry */
+void fib_free(struct fib *); /* Destroy the fib */
+void fib_check(struct fib *); /* Consistency check for debugging */
+
+void fit_init(struct fib_iterator *, struct fib *); /* Internal functions, don't call */
+struct fib_node *fit_get(struct fib *, struct fib_iterator *);
+void fit_put(struct fib_iterator *, struct fib_node *);
+void fit_put_next(struct fib *f, struct fib_iterator *i, struct fib_node *n, uint hpos);
+void fit_put_end(struct fib_iterator *i);
+void fit_copy(struct fib *f, struct fib_iterator *dst, struct fib_iterator *src);
+
+
+#define FIB_WALK(fib, type, z) do { \
+ struct fib_node *fn_, **ff_ = (fib)->hash_table; \
+ uint count_ = (fib)->hash_size; \
+ type *z; \
+ while (count_--) \
+ for (fn_ = *ff_++; z = fib_node_to_user(fib, fn_); fn_=fn_->next)
+
+#define FIB_WALK_END } while (0)
+
+#define FIB_ITERATE_INIT(it, fib) fit_init(it, fib)
+
+#define FIB_ITERATE_START(fib, it, type, z) do { \
+ struct fib_node *fn_ = fit_get(fib, it); \
+ uint count_ = (fib)->hash_size; \
+ uint hpos_ = (it)->hash; \
+ type *z; \
+ for(;;) { \
+ if (!fn_) \
+ { \
+ if (++hpos_ >= count_) \
+ break; \
+ fn_ = (fib)->hash_table[hpos_]; \
+ continue; \
+ } \
+ z = fib_node_to_user(fib, fn_);
+
+#define FIB_ITERATE_END fn_ = fn_->next; } } while(0)
+
+#define FIB_ITERATE_PUT(it) fit_put(it, fn_)
+
+#define FIB_ITERATE_PUT_NEXT(it, fib) fit_put_next(fib, it, fn_, hpos_)
+
+#define FIB_ITERATE_PUT_END(it) fit_put_end(it)
+
+#define FIB_ITERATE_UNLINK(it, fib) fit_get(fib, it)
+
+#define FIB_ITERATE_COPY(dst, src, fib) fit_copy(fib, dst, src)
+
+#endif
#include "lib/resource.h"
#include "lib/net.h"
#include "lib/type.h"
+#include "lib/fib.h"
struct ea_list;
struct protocol;
struct rte_src;
struct symbol;
struct timer;
-struct fib;
struct filter;
struct f_trie;
struct f_trie_walk_state;
struct cli;
-/*
- * Generic data structure for storing network prefixes. Also used
- * for the master routing table. Currently implemented as a hash
- * table.
- *
- * Available operations:
- * - insertion of new entry
- * - deletion of entry
- * - searching for entry by network prefix
- * - asynchronous retrieval of fib contents
- */
-
-struct fib_node {
- struct fib_node *next; /* Next in hash chain */
- struct fib_iterator *readers; /* List of readers of this node */
- net_addr addr[0];
-};
-
-struct fib_iterator { /* See lib/slists.h for an explanation */
- struct fib_iterator *prev, *next; /* Must be synced with struct fib_node! */
- byte efef; /* 0xff to distinguish between iterator and node */
- byte pad[3];
- struct fib_node *node; /* Or NULL if freshly merged */
- uint hash;
-};
-
-typedef void (*fib_init_fn)(struct fib *, void *);
-
-struct fib {
- pool *fib_pool; /* Pool holding all our data */
- slab *fib_slab; /* Slab holding all fib nodes */
- struct fib_node **hash_table; /* Node hash table */
- uint hash_size; /* Number of hash table entries (a power of two) */
- uint hash_order; /* Binary logarithm of hash_size */
- uint hash_shift; /* 32 - hash_order */
- uint addr_type; /* Type of address data stored in fib (NET_*) */
- uint node_size; /* FIB node size, 0 for nonuniform */
- uint node_offset; /* Offset of fib_node struct inside of user data */
- uint entries; /* Number of entries */
- uint entries_min, entries_max; /* Entry count limits (else start rehashing) */
- fib_init_fn init; /* Constructor */
-};
-
-static inline void * fib_node_to_user(struct fib *f, struct fib_node *e)
-{ return e ? (void *) ((char *) e - f->node_offset) : NULL; }
-
-static inline struct fib_node * fib_user_to_node(struct fib *f, void *e)
-{ return e ? (void *) ((char *) e + f->node_offset) : NULL; }
-
-void fib_init(struct fib *f, pool *p, uint addr_type, uint node_size, uint node_offset, uint hash_order, fib_init_fn init);
-void *fib_find(struct fib *, const net_addr *); /* Find or return NULL if doesn't exist */
-void *fib_get_chain(struct fib *f, const net_addr *a); /* Find first node in linked list from hash table */
-void *fib_get(struct fib *, const net_addr *); /* Find or create new if nonexistent */
-void *fib_route(struct fib *, const net_addr *); /* Longest-match routing lookup */
-void fib_delete(struct fib *, void *); /* Remove fib entry */
-void fib_free(struct fib *); /* Destroy the fib */
-void fib_check(struct fib *); /* Consistency check for debugging */
-
-void fit_init(struct fib_iterator *, struct fib *); /* Internal functions, don't call */
-struct fib_node *fit_get(struct fib *, struct fib_iterator *);
-void fit_put(struct fib_iterator *, struct fib_node *);
-void fit_put_next(struct fib *f, struct fib_iterator *i, struct fib_node *n, uint hpos);
-void fit_put_end(struct fib_iterator *i);
-void fit_copy(struct fib *f, struct fib_iterator *dst, struct fib_iterator *src);
-
-
-#define FIB_WALK(fib, type, z) do { \
- struct fib_node *fn_, **ff_ = (fib)->hash_table; \
- uint count_ = (fib)->hash_size; \
- type *z; \
- while (count_--) \
- for (fn_ = *ff_++; z = fib_node_to_user(fib, fn_); fn_=fn_->next)
-
-#define FIB_WALK_END } while (0)
-
-#define FIB_ITERATE_INIT(it, fib) fit_init(it, fib)
-
-#define FIB_ITERATE_START(fib, it, type, z) do { \
- struct fib_node *fn_ = fit_get(fib, it); \
- uint count_ = (fib)->hash_size; \
- uint hpos_ = (it)->hash; \
- type *z; \
- for(;;) { \
- if (!fn_) \
- { \
- if (++hpos_ >= count_) \
- break; \
- fn_ = (fib)->hash_table[hpos_]; \
- continue; \
- } \
- z = fib_node_to_user(fib, fn_);
-
-#define FIB_ITERATE_END fn_ = fn_->next; } } while(0)
-
-#define FIB_ITERATE_PUT(it) fit_put(it, fn_)
-
-#define FIB_ITERATE_PUT_NEXT(it, fib) fit_put_next(fib, it, fn_, hpos_)
-
-#define FIB_ITERATE_PUT_END(it) fit_put_end(it)
-
-#define FIB_ITERATE_UNLINK(it, fib) fit_get(fib, it)
-
-#define FIB_ITERATE_COPY(dst, src, fib) fit_copy(fib, dst, src)
-
-
/*
* Master Routing Tables. Generally speaking, each of them contains a FIB
* with each entry pointing to a list of route entries representing routes
projects / thirdparty / bird.git / commitdiff
