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/*
* Imported: Id: patricia.h 18598 2005-03-04 17:45:53Z androsyn
* Dave Plonka <plonka@doit.wisc.edu>
*
* This product includes software developed by the University of Michigan,
* Merit Network, Inc., and their contributors.
*
* This file had been called "radix.h" in the MRT sources.
*
* I renamed it to "patricia.h" since it's not an implementation of a general
* radix trie. Also, pulled in various requirements from "mrt.h" and added
* some other things it could be used as a standalone API.
*/
#ifndef PATRICIA_C
#define EXTERN extern
#else /* PATRICIA_C */
#define EXTERN
#endif /* PATRICIA_C */
#ifndef _PATRICIA_H
#define _PATRICIA_H
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE !(FALSE)
#endif
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
/* typedef unsigned int u_int; */
typedef void (*void_fn_t) ();
#define prefix_touchar(prefix) ((u_char *)&(prefix)->add.sin)
#define MAXLINE 1024
#define BIT_TEST(f, b) ((f) & (b))
#include <netinet/in.h>
#include <sys/socket.h>
typedef struct _prefix_t
{
u_short family; /* AF_INET | AF_INET6 */
u_short bitlen; /* same as mask? */
int ref_count; /* reference count */
union
{
struct in_addr sin;
#ifdef INET6
struct in6_addr sin6;
#endif /* IPV6 */
}
add;
}
prefix_t;
typedef struct _patricia_node_t
{
u_int bit; /* flag if this node used */
prefix_t *prefix; /* who we are in patricia tree */
struct _patricia_node_t *l, *r; /* left and right children */
struct _patricia_node_t *parent; /* may be used */
void *data;
}
patricia_node_t;
typedef struct _patricia_tree_t
{
patricia_node_t *head;
u_int maxbits; /* for IP, 32 bit addresses */
int num_active_node; /* for debug purpose */
}
patricia_tree_t;
EXTERN patricia_node_t *patricia_match_ip(patricia_tree_t *, struct IN_ADDR *);
patricia_node_t *patricia_match_string(patricia_tree_t *, const char *);
patricia_node_t *patricia_match_exact_string(patricia_tree_t *, const char *);
patricia_node_t *patricia_search_exact(patricia_tree_t *, prefix_t *);
patricia_node_t *patricia_search_best(patricia_tree_t *, prefix_t *);
patricia_node_t *patricia_search_best2(patricia_tree_t *, prefix_t *, int);
patricia_node_t *patricia_lookup(patricia_tree_t *, prefix_t *);
EXTERN void patricia_remove(patricia_tree_t *, patricia_node_t *);
EXTERN patricia_tree_t *patricia_new(int);
void patricia_clear(patricia_tree_t *, void_fn_t);
EXTERN void patricia_destroy(patricia_tree_t *, void_fn_t);
void patricia_process(patricia_tree_t *, void_fn_t);
void patricia_init(void);
#if 0
prefix_t *ascii2prefix(int family, char *string);
#endif
patricia_node_t *patricia_make_and_lookup(patricia_tree_t *, const char *);
EXTERN patricia_node_t *patricia_make_and_lookup_ip(patricia_tree_t *, struct IN_ADDR *, int);
#define PATRICIA_MAXBITS 128
#define PATRICIA_NBIT(x) (0x80 >> ((x) & 0x7f))
#define PATRICIA_NBYTE(x) ((x) >> 3)
#define PATRICIA_DATA_GET(node, type) (type *)((node)->data)
#define PATRICIA_DATA_SET(node, value) ((node)->data = (void *)(value))
#define PATRICIA_WALK(Xhead, Xnode) \
do { \
patricia_node_t *Xstack[PATRICIA_MAXBITS+1]; \
patricia_node_t **Xsp = Xstack; \
patricia_node_t *Xrn = (Xhead); \
while ((Xnode = Xrn)) { \
if (Xnode->prefix)
#define PATRICIA_WALK_ALL(Xhead, Xnode) \
do { \
patricia_node_t *Xstack[PATRICIA_MAXBITS+1]; \
patricia_node_t **Xsp = Xstack; \
patricia_node_t *Xrn = (Xhead); \
while ((Xnode = Xrn)) { \
if (1)
#define PATRICIA_WALK_BREAK { \
if (Xsp != Xstack) { \
Xrn = *(--Xsp); \
} else { \
Xrn = (patricia_node_t *) 0; \
} \
continue; }
#define PATRICIA_WALK_END \
if (Xrn->l) { \
if (Xrn->r) { \
*Xsp++ = Xrn->r; \
} \
Xrn = Xrn->l; \
} else if (Xrn->r) { \
Xrn = Xrn->r; \
} else if (Xsp != Xstack) { \
Xrn = *(--Xsp); \
} else { \
Xrn = (patricia_node_t *) 0; \
} \
} \
} while (0)
#endif /* _PATRICIA_H */
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