[apple/xnu.git] / bsd / net / radix.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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 _RADIX_H_
#define	_RADIX_H_

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_RTABLE);
#endif

/*
 * 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 */
	short	rn_b;			/* bit offset; -1-index(netmask) */
	char	rn_bmask;		/* node: mask for bit test*/
	u_char	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: */
			caddr_t	rn_Key;		/* object of search */
			caddr_t	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
	int 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 {
	short	rm_b;			/* bit offset; -1-index(netmask) */
	char	rm_unused;		/* cf. rn_bmask */
	u_char	rm_flags;		/* cf. rn_flags */
	struct	radix_mask *rm_mklist;	/* more masks to try */
	union	{
		caddr_t	rmu_mask;		/* the mask */
		struct	radix_node *rmu_leaf;	/* for normal routes */
	}	rm_rmu;
	int	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 */

#define MKGet(m) {\
	if (rn_mkfreelist) {\
		m = rn_mkfreelist; \
		rn_mkfreelist = (m)->rm_mklist; \
	} else \
		R_Malloc(m, struct radix_mask *, sizeof (*(m))); }\

#define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);}

typedef int walktree_f_t __P((struct radix_node *, void *));

struct radix_node_head {
	struct	radix_node *rnh_treetop;
	int	rnh_addrsize;		/* permit, but not require fixed keys */
	int	rnh_pktsize;		/* permit, but not require fixed keys */
	struct	radix_node *(*rnh_addaddr)	/* add based on sockaddr */
		__P((void *v, void *mask,
		     struct radix_node_head *head, struct radix_node nodes[]));
	struct	radix_node *(*rnh_addpkt)	/* add based on packet hdr */
		__P((void *v, void *mask,
		     struct radix_node_head *head, struct radix_node nodes[]));
	struct	radix_node *(*rnh_deladdr)	/* remove based on sockaddr */
		__P((void *v, void *mask, struct radix_node_head *head));
	struct	radix_node *(*rnh_delpkt)	/* remove based on packet hdr */
		__P((void *v, void *mask, struct radix_node_head *head));
	struct	radix_node *(*rnh_matchaddr)	/* locate based on sockaddr */
		__P((void *v, struct radix_node_head *head));
	struct	radix_node *(*rnh_lookup)	/* locate based on sockaddr */
		__P((void *v, void *mask, struct radix_node_head *head));
	struct	radix_node *(*rnh_matchpkt)	/* locate based on packet hdr */
		__P((void *v, struct radix_node_head *head));
	int	(*rnh_walktree)			/* traverse tree */
		__P((struct radix_node_head *head, walktree_f_t *f, void *w));
	int	(*rnh_walktree_from)		/* traverse tree below a */
		__P((struct radix_node_head *head, void *a, void *m,
		     walktree_f_t *f, void *w));
	void	(*rnh_close)	/* do something when the last ref drops */
		__P((struct radix_node *rn, struct radix_node_head *head));
	struct	radix_node rnh_nodes[3];	/* empty tree for common case */
};

#ifndef KERNEL
#define Bcmp(a, b, n) bcmp(((char *)(a)), ((char *)(b)), (n))
#define Bcopy(a, b, n) bcopy(((char *)(a)), ((char *)(b)), (unsigned)(n))
#define Bzero(p, n) bzero((char *)(p), (int)(n));
#define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n)))
#define Free(p) free((char *)p);
#else
#define Bcmp(a, b, n) bcmp(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n))
#define Bcopy(a, b, n) bcopy(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n))
#define Bzero(p, n) bzero((caddr_t)(p), (unsigned)(n));
#define R_Malloc(p, t, n) (p = (t) _MALLOC((unsigned long)(n), M_RTABLE, M_DONTWAIT))
#define Free(p) FREE((caddr_t)p, M_RTABLE);
#endif /*KERNEL*/

void	 rn_init __P((void));
int	 rn_inithead __P((void **, int));
int	 rn_refines __P((void *, void *));
struct radix_node
	 *rn_addmask __P((void *, int, int)),
	 *rn_addroute __P((void *, void *, struct radix_node_head *,
			struct radix_node [2])),
	 *rn_delete __P((void *, void *, struct radix_node_head *)),
	 *rn_lookup __P((void *v_arg, void *m_arg,
		        struct radix_node_head *head)),
	 *rn_match __P((void *, struct radix_node_head *));


#endif /* _RADIX_H_ */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1988, 1989, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the above copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* This product includes software developed by the University of
	37	* California, Berkeley and its contributors.
	38	* 4. Neither the name of the University nor the names of its contributors
	39	* may be used to endorse or promote products derived from this software
	40	* without specific prior written permission.
	41	*
	42	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	43	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	44	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	45	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	46	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	47	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	48	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	49	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	50	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	51	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	52	* SUCH DAMAGE.
	53	*
	54	* @(#)radix.h 8.2 (Berkeley) 10/31/94
	55	*/
	56
	57	#ifndef _RADIX_H_
	58	#define _RADIX_H_
	59
	60	#ifdef MALLOC_DECLARE
	61	MALLOC_DECLARE(M_RTABLE);
	62	#endif
	63
	64	/*
65	* Radix search tree node layout.
66	*/
67
68	struct radix_node {
69	struct radix_mask rn_mklist; / list of masks contained in subtree */
70	struct radix_node rn_p; / parent */
71	short rn_b; /* bit offset; -1-index(netmask) */
72	char rn_bmask; /* node: mask for bit test*/
73	u_char rn_flags; /* enumerated next */
74	#define RNF_NORMAL 1 /* leaf contains normal route */
75	#define RNF_ROOT 2 /* leaf is root leaf for tree */
76	#define RNF_ACTIVE 4 /* This node is alive (for rtfree) */
77	union {
78	struct { /* leaf only data: */
79	caddr_t rn_Key; /* object of search */
80	caddr_t rn_Mask; /* netmask, if present */
81	struct radix_node *rn_Dupedkey;
82	} rn_leaf;
83	struct { /* node only data: */
84	int rn_Off; /* where to start compare */
85	struct radix_node rn_L;/ progeny */
86	struct radix_node rn_R;/ progeny */
87	} rn_node;
88	} rn_u;
89	#ifdef RN_DEBUG
90	int rn_info;
91	struct radix_node *rn_twin;
92	struct radix_node *rn_ybro;
93	#endif
94	};
95
96	#define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey
97	#define rn_key rn_u.rn_leaf.rn_Key
98	#define rn_mask rn_u.rn_leaf.rn_Mask
99	#define rn_off rn_u.rn_node.rn_Off
100	#define rn_l rn_u.rn_node.rn_L
101	#define rn_r rn_u.rn_node.rn_R
102
103	/*
104	* Annotations to tree concerning potential routes applying to subtrees.
105	*/
106
107	struct radix_mask {
108	short rm_b; /* bit offset; -1-index(netmask) */
109	char rm_unused; /* cf. rn_bmask */
110	u_char rm_flags; /* cf. rn_flags */
111	struct radix_mask rm_mklist; / more masks to try */
112	union {
113	caddr_t rmu_mask; /* the mask */
114	struct radix_node rmu_leaf; / for normal routes */
115	} rm_rmu;
116	int rm_refs; /* # of references to this struct */
117	};
118
119	#define rm_mask rm_rmu.rmu_mask
120	#define rm_leaf rm_rmu.rmu_leaf /* extra field would make 32 bytes */
121
122	#define MKGet(m) {\
123	if (rn_mkfreelist) {\
124	m = rn_mkfreelist; \
125	rn_mkfreelist = (m)->rm_mklist; \
126	} else \
127	R_Malloc(m, struct radix_mask , sizeof ((m))); }\
128
129	#define MKFree(m) { (m)->rm_mklist = rn_mkfreelist; rn_mkfreelist = (m);}
130
131	typedef int walktree_f_t __P((struct radix_node , void ));
132
133	struct radix_node_head {
134	struct radix_node *rnh_treetop;
135	int rnh_addrsize; /* permit, but not require fixed keys */
136	int rnh_pktsize; /* permit, but not require fixed keys */
137	struct radix_node (rnh_addaddr) /* add based on sockaddr */
138	__P((void v, void mask,
139	struct radix_node_head *head, struct radix_node nodes[]));
140	struct radix_node (rnh_addpkt) /* add based on packet hdr */
141	__P((void v, void mask,
142	struct radix_node_head *head, struct radix_node nodes[]));
143	struct radix_node (rnh_deladdr) /* remove based on sockaddr */
144	__P((void v, void mask, struct radix_node_head *head));
145	struct radix_node (rnh_delpkt) /* remove based on packet hdr */
146	__P((void v, void mask, struct radix_node_head *head));
147	struct radix_node (rnh_matchaddr) /* locate based on sockaddr */
148	__P((void v, struct radix_node_head head));
149	struct radix_node (rnh_lookup) /* locate based on sockaddr */
150	__P((void v, void mask, struct radix_node_head *head));
151	struct radix_node (rnh_matchpkt) /* locate based on packet hdr */
152	__P((void v, struct radix_node_head head));
153	int (rnh_walktree) / traverse tree */
154	__P((struct radix_node_head head, walktree_f_t f, void *w));
155	int (rnh_walktree_from) / traverse tree below a */
156	__P((struct radix_node_head head, void a, void *m,
157	walktree_f_t f, void w));
158	void (rnh_close) / do something when the last ref drops */
159	__P((struct radix_node rn, struct radix_node_head head));
160	struct radix_node rnh_nodes[3]; /* empty tree for common case */
161	};
162
163	#ifndef KERNEL
164	#define Bcmp(a, b, n) bcmp(((char )(a)), ((char )(b)), (n))
165	#define Bcopy(a, b, n) bcopy(((char )(a)), ((char )(b)), (unsigned)(n))
166	#define Bzero(p, n) bzero((char *)(p), (int)(n));
167	#define R_Malloc(p, t, n) (p = (t) malloc((unsigned int)(n)))
168	#define Free(p) free((char *)p);
169	#else
170	#define Bcmp(a, b, n) bcmp(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n))
171	#define Bcopy(a, b, n) bcopy(((caddr_t)(a)), ((caddr_t)(b)), (unsigned)(n))
172	#define Bzero(p, n) bzero((caddr_t)(p), (unsigned)(n));
173	#define R_Malloc(p, t, n) (p = (t) _MALLOC((unsigned long)(n), M_RTABLE, M_DONTWAIT))
174	#define Free(p) FREE((caddr_t)p, M_RTABLE);
175	#endif /KERNEL/
176
177	void rn_init __P((void));
178	int rn_inithead __P((void **, int));
179	int rn_refines __P((void , void ));
180	struct radix_node
181	rn_addmask __P((void , int, int)),
182	rn_addroute __P((void , void , struct radix_node_head ,
183	struct radix_node [2])),
184	rn_delete __P((void , void , struct radix_node_head )),
185	rn_lookup __P((void v_arg, void *m_arg,
186	struct radix_node_head *head)),
187	rn_match __P((void , struct radix_node_head *));
188
189
190	#endif /* _RADIX_H_ */