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Diffstat (limited to 'src/vnet/util/radix.h')
| -rw-r--r-- | src/vnet/util/radix.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/vnet/util/radix.h b/src/vnet/util/radix.h new file mode 100644 index 00000000..d9ba6659 --- /dev/null +++ b/src/vnet/util/radix.h @@ -0,0 +1,147 @@ +/* $NetBSD: radix.h,v 1.23 2016/11/15 01:50:06 ozaki-r Exp $ */ + +/* + * Copyright (c) 1988, 1989, 1993 + * The Regents of the University of California. 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. Neither the name of the University 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 THE REGENTS 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. + * + * @(#)radix.h 8.2 (Berkeley) 10/31/94 + */ + +#ifndef _NET_RADIX_H_ +#define _NET_RADIX_H_ + +#include <vlib/vlib.h> + +/* + * Radix search tree node layout. + */ + +struct radix_node { + struct radix_mask *rn_mklist; /* list of masks contained in subtree */ + struct radix_node *rn_p; /* parent */ + i16 rn_b; /* bit offset; -1-index(netmask) */ + u8 rn_bmask; /* node: mask for bit test*/ + u8 rn_flags; /* enumerated next */ +#define RNF_NORMAL 1 /* leaf contains normal route */ +#define RNF_ROOT 2 /* leaf is root leaf for tree */ +#define RNF_ACTIVE 4 /* This node is alive (for rtfree) */ + union { + struct { /* leaf only data: */ + const char *rn_Key; /* object of search */ + const char *rn_Mask; /* netmask, if present */ + struct radix_node *rn_Dupedkey; + } rn_leaf; + struct { /* node only data: */ + int rn_Off; /* where to start compare */ + struct radix_node *rn_L;/* progeny */ + struct radix_node *rn_R;/* progeny */ + } rn_node; + } rn_u; +#ifdef RN_DEBUG + i32 rn_info; + struct radix_node *rn_twin; + struct radix_node *rn_ybro; +#endif +}; + +#define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey +#define rn_key rn_u.rn_leaf.rn_Key +#define rn_mask rn_u.rn_leaf.rn_Mask +#define rn_off rn_u.rn_node.rn_Off +#define rn_l rn_u.rn_node.rn_L +#define rn_r rn_u.rn_node.rn_R + +/* + * Annotations to tree concerning potential routes applying to subtrees. + */ + +struct radix_mask { + i16 rm_b; /* bit offset; -1-index(netmask) */ + i8 rm_unused; /* cf. rn_bmask */ + u8 rm_flags; /* cf. rn_flags */ + struct radix_mask *rm_mklist; /* more masks to try */ + union { + const char *rmu_mask; /* the mask */ + struct radix_node *rmu_leaf; /* for normal routes */ + } rm_rmu; + i32 rm_refs; /* # of references to this struct */ +}; + +#define rm_mask rm_rmu.rmu_mask +#define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */ + +struct radix_node_head { + struct radix_node *rnh_treetop; + i32 rnh_addrsize; /* permit, but not require fixed keys */ + i32 rnh_pktsize; /* permit, but not require fixed keys */ + struct radix_node *(*rnh_addaddr) /* add based on sockaddr */ + (const void *v, const void *mask, + struct radix_node_head *head, struct radix_node nodes[]); + struct radix_node *(*rnh_addpkt) /* add based on packet hdr */ + (const void *v, const void *mask, + struct radix_node_head *head, struct radix_node nodes[]); + struct radix_node *(*rnh_deladdr) /* remove based on sockaddr */ + (const void *v, const void *mask, struct radix_node_head *head); + struct radix_node *(*rnh_delpkt) /* remove based on packet hdr */ + (const void *v, const void *mask, struct radix_node_head *head); + struct radix_node *(*rnh_matchaddr) /* locate based on sockaddr */ + (const void *v, struct radix_node_head *head); + struct radix_node *(*rnh_lookup) /* locate based on sockaddr */ + (const void *v, const void *mask, struct radix_node_head *head); + struct radix_node *(*rnh_matchpkt) /* locate based on packet hdr */ + (const void *v, struct radix_node_head *head); + struct radix_node rnh_nodes[3]; /* empty tree for common case */ +}; + +void rn_init(void); +int rn_inithead(void **, int); +void rn_delayedinit(void **, int); +int rn_inithead0(struct radix_node_head *, int); +int rn_refines(const void *, const void *); +int rn_walktree(struct radix_node_head *, + int (*)(struct radix_node *, void *), + void *); +struct radix_node * + rn_search_matched(struct radix_node_head *, + int (*)(struct radix_node *, void *), + void *); +struct radix_node + *rn_addmask(const void *, int, int), + *rn_addroute(const void *, const void *, struct radix_node_head *, + struct radix_node [2]), + *rn_delete1(const void *, const void *, struct radix_node_head *, + struct radix_node *), + *rn_delete(const void *, const void *, struct radix_node_head *), + *rn_insert(const void *, struct radix_node_head *, int *, + struct radix_node [2]), + *rn_lookup(const void *, const void *, struct radix_node_head *), + *rn_match(const void *, struct radix_node_head *), + *rn_newpair(const void *, int, struct radix_node[2]), + *rn_search(const void *, struct radix_node *), + *rn_search_m(const void *, struct radix_node *, const void *); + +#endif /* !_NET_RADIX_H_ */ |