diff options
author | Maria Matejka <mq@ucw.cz> | 2022-05-30 15:43:45 +0200 |
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committer | Maria Matejka <mq@ucw.cz> | 2022-05-30 15:43:45 +0200 |
commit | ba35b0f818cadc354aba3efe373f21939249c6ed (patch) | |
tree | 575ce2dae0801c765eec8a3ab2ec8f0dfb2cfcf0 /nest | |
parent | 54344f15f8a6a6f5f0388097a1825a9c08c17482 (diff) | |
parent | 0e1e632f70b74cf111f08175ab3634db2f962579 (diff) |
Merge commit '0e1e632f70b74cf111f08175ab3634db2f962579' into haugesund
Diffstat (limited to 'nest')
-rw-r--r-- | nest/route.h | 107 |
1 files changed, 1 insertions, 106 deletions
diff --git a/nest/route.h b/nest/route.h index 89eb32ff..33936635 100644 --- a/nest/route.h +++ b/nest/route.h @@ -15,6 +15,7 @@ #include "lib/resource.h" #include "lib/net.h" #include "lib/type.h" +#include "lib/fib.h" struct ea_list; struct protocol; @@ -23,118 +24,12 @@ struct channel; 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 * to given network (with the selected one at the head). |