/************************************************************************* * (C) 2007 AITNET ltd - Sofia/Bulgaria - * by Michael Pounov * * $Author: misho $ * $Id: apatricia.h,v 1.4 2015/06/25 17:53:49 misho Exp $ * ************************************************************************** The ELWIX and AITNET software is distributed under the following terms: All of the documentation and software included in the ELWIX and AITNET Releases is copyrighted by ELWIX - Sofia/Bulgaria Copyright 2004 - 2015 by Michael Pounov . All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by Michael Pounov ELWIX - Embedded LightWeight unIX and its contributors. 4. Neither the name of AITNET nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * 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 "apatricia.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. * * Added and patched existing code by AITNET - Michael Pounov */ #ifndef __APATRICIA_H #define __APATRICIA_H #include /* for struct in_addr */ #include /* for AF_INET */ /* typedef unsigned int u_int; in most cases is NULL for functions parameter */ typedef void (*void_fn_t)(); /* { from mrt.h */ typedef struct _prefix4_t { u_short family; /* AF_INET | AF_INET6 */ u_short bitlen; /* same as mask? */ int ref_count; /* reference count */ struct in_addr sin; } prefix4_t; 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 HAVE_IPV6 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; /* pointer to data */ void *user1; /* pointer to usr data (ex. route flap info) */ } 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; patricia_tree_t *New_Patricia(int maxbits); void Destroy_Patricia(patricia_tree_t *patricia, void_fn_t func); void Clear_Patricia(patricia_tree_t *patricia, void_fn_t func); prefix_t *Ref_Prefix(prefix_t *prefix); void Deref_Prefix(prefix_t * prefix); patricia_node_t *patricia_lookup(patricia_tree_t *patricia, prefix_t *prefix); void patricia_remove(patricia_tree_t *patricia, patricia_node_t *node); void patricia_process(patricia_tree_t *patricia, void_fn_t func); patricia_node_t *patricia_search_exact(patricia_tree_t *patricia, prefix_t *prefix); patricia_node_t *patricia_search_best(patricia_tree_t *patricia, prefix_t *prefix); patricia_node_t *patricia_search_best2(patricia_tree_t *patricia, prefix_t *prefix, int inclusive); /* { from demo.c */ char *prefix_toa(prefix_t *prefix); prefix_t *ascii2prefix(int family, char *string); #define addroute make_and_lookup patricia_node_t *make_and_lookup(patricia_tree_t *tree, char *string); #define delroute lookup_then_remove void lookup_then_remove(patricia_tree_t *tree, char *string); patricia_node_t *try_search_exact(patricia_tree_t *tree, char *string); patricia_node_t *try_search_best(patricia_tree_t *tree, char *string); /* } */ /* { from defs.h */ #define prefix_touchar(prefix) ((u_char *) &(prefix)->add.sin) #define Delete free #define MAXLINE 1024 #define BIT_TEST(f, b) ((f) & (b)) /* } */ #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 (42) #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 /* __APATRICIA_H */