mirror of
https://github.com/matrix-construct/construct
synced 2024-11-25 16:22:35 +01:00
147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/*
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* Dave Plonka <plonka@doit.wisc.edu>
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*
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* This product includes software developed by the University of Michigan,
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* Merit Network, Inc., and their contributors.
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*
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* This file had been called "radix.h" in the MRT sources.
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*
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* I renamed it to "patricia.h" since it's not an implementation of a general
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* radix trie. Also, pulled in various requirements from "mrt.h" and added
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* some other things it could be used as a standalone API.
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*/
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#ifndef _RB_PATRICIA_H
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#define _RB_PATRICIA_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE !(FALSE)
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#endif
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#ifndef INET6_ADDRSTRLEN
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#define INET6_ADDRSTRLEN 46
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#endif
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#define rb_prefix_touchar(prefix) ((unsigned char *)&(prefix)->add.sin)
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#define MAXLINE 1024
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#define BIT_TEST(f, b) ((f) & (b))
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typedef struct _rb_prefix_t
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{
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unsigned short family; /* AF_INET | AF_INET6 */
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unsigned short bitlen; /* same as mask? */
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int ref_count; /* reference count */
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union
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{
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struct in_addr sin;
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#ifdef RB_IPV6
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struct in6_addr sin6;
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#endif /* RB_IPV6 */
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}
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add;
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}
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rb_prefix_t;
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typedef struct _rb_patricia_node_t
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{
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unsigned int bit; /* flag if this node used */
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rb_prefix_t *prefix; /* who we are in patricia tree */
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struct _rb_patricia_node_t *l, *r; /* left and right children */
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struct _rb_patricia_node_t *parent; /* may be used */
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void *data;
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}
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rb_patricia_node_t;
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typedef struct _rb_patricia_tree_t
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{
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rb_patricia_node_t *head;
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unsigned int maxbits; /* for IP, 32 bit addresses */
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int num_active_node; /* for debug purpose */
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}
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rb_patricia_tree_t;
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rb_patricia_node_t *rb_match_ip(rb_patricia_tree_t *tree, struct sockaddr *ip);
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rb_patricia_node_t *rb_match_ip_exact(rb_patricia_tree_t *tree, struct sockaddr *ip,
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unsigned int len);
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rb_patricia_node_t *rb_match_string(rb_patricia_tree_t *tree, const char *string);
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rb_patricia_node_t *rb_match_exact_string(rb_patricia_tree_t *tree, const char *string);
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rb_patricia_node_t *rb_patricia_search_exact(rb_patricia_tree_t *patricia, rb_prefix_t *prefix);
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rb_patricia_node_t *rb_patricia_search_best(rb_patricia_tree_t *patricia, rb_prefix_t *prefix);
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rb_patricia_node_t *rb_patricia_search_best2(rb_patricia_tree_t *patricia,
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rb_prefix_t *prefix, int inclusive);
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rb_patricia_node_t *rb_patricia_lookup(rb_patricia_tree_t *patricia, rb_prefix_t *prefix);
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void rb_patricia_remove(rb_patricia_tree_t *patricia, rb_patricia_node_t *node);
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rb_patricia_tree_t *rb_new_patricia(int maxbits);
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void rb_clear_patricia(rb_patricia_tree_t *patricia, void (*func) (void *));
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void rb_destroy_patricia(rb_patricia_tree_t *patricia, void (*func) (void *));
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void rb_patricia_process(rb_patricia_tree_t *patricia, void (*func) (rb_prefix_t *, void *));
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void rb_init_patricia(void);
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#if 0
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rb_prefix_t *ascii2prefix(int family, char *string);
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#endif
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rb_patricia_node_t *make_and_lookup(rb_patricia_tree_t *tree, const char *string);
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rb_patricia_node_t *make_and_lookup_ip(rb_patricia_tree_t *tree, struct sockaddr *, int bitlen);
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#define RB_PATRICIA_MAXBITS 128
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#define RB_PATRICIA_NBIT(x) (0x80 >> ((x) & 0x7f))
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#define RB_PATRICIA_NBYTE(x) ((x) >> 3)
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#define RB_PATRICIA_DATA_GET(node, type) (type *)((node)->data)
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#define RB_PATRICIA_DATA_SET(node, value) ((node)->data = (void *)(value))
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#define RB_PATRICIA_WALK(Xhead, Xnode) \
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do { \
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rb_patricia_node_t *Xstack[RB_PATRICIA_MAXBITS+1]; \
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rb_patricia_node_t **Xsp = Xstack; \
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rb_patricia_node_t *Xrn = (Xhead); \
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while ((Xnode = Xrn)) { \
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if (Xnode->prefix)
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#define RB_PATRICIA_WALK_ALL(Xhead, Xnode) \
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do { \
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rb_patricia_node_t *Xstack[RB_PATRICIA_MAXBITS+1]; \
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rb_patricia_node_t **Xsp = Xstack; \
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rb_patricia_node_t *Xrn = (Xhead); \
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while ((Xnode = Xrn)) { \
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if (1)
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#define RB_PATRICIA_WALK_BREAK { \
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if (Xsp != Xstack) { \
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Xrn = *(--Xsp); \
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} else { \
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Xrn = (rb_patricia_node_t *) 0; \
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} \
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continue; }
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#define RB_PATRICIA_WALK_END \
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if (Xrn->l) { \
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if (Xrn->r) { \
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*Xsp++ = Xrn->r; \
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} \
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Xrn = Xrn->l; \
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} else if (Xrn->r) { \
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Xrn = Xrn->r; \
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} else if (Xsp != Xstack) { \
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Xrn = *(--Xsp); \
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} else { \
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Xrn = (rb_patricia_node_t *) 0; \
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} \
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} \
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} while (0)
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* _RB_PATRICIA_H */
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