1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000, 2001 Boris Popov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28#ifndef _SYS_MCHAIN_H_
29#define _SYS_MCHAIN_H_
30
31#ifdef _KERNEL
32
33/*
34 * Type of copy for mb_{put|get}_mem()
35 */
36#define MB_MSYSTEM 0 /* use bcopy() */
37#define MB_MUSER 1 /* use copyin()/copyout() */
38#define MB_MINLINE 2 /* use an inline copy loop */
39#define MB_MZERO 3 /* bzero(), mb_put_mem only */
40#define MB_MCUSTOM 4 /* use an user defined function */
41
42struct mbuf;
43struct mbchain;
44
45typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
46 size_t *srclen, size_t *dstlen);
47
48struct mbchain {
49 struct mbuf * mb_top; /* head of mbufs chain */
50 struct mbuf * mb_cur; /* current mbuf */
51 int mb_mleft; /* free space in the current mbuf */
52 int mb_count; /* total number of bytes */
53 mb_copy_t * mb_copy; /* user defined copy function */
54 void * mb_udata; /* user data */
55};
56
57struct mdchain {
58 struct mbuf * md_top; /* head of mbufs chain */
59 struct mbuf * md_cur; /* current mbuf */
60 u_char * md_pos; /* offset in the current mbuf */
61};
62
63int mb_init(struct mbchain *mbp);
64void mb_initm(struct mbchain *mbp, struct mbuf *m);
65void mb_done(struct mbchain *mbp);
66struct mbuf *mb_detach(struct mbchain *mbp);
67int mb_fixhdr(struct mbchain *mbp);
68caddr_t mb_reserve(struct mbchain *mbp, int size);
69
70int mb_put_padbyte(struct mbchain *mbp);
71int mb_put_uint8(struct mbchain *mbp, u_int8_t x);
72int mb_put_uint16be(struct mbchain *mbp, u_int16_t x);
73int mb_put_uint16le(struct mbchain *mbp, u_int16_t x);
74int mb_put_uint32be(struct mbchain *mbp, u_int32_t x);
75int mb_put_uint32le(struct mbchain *mbp, u_int32_t x);
76int mb_put_int64be(struct mbchain *mbp, int64_t x);
77int mb_put_int64le(struct mbchain *mbp, int64_t x);
78int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type);
79int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m);
80int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size);
81
82int md_init(struct mdchain *mdp);
83void md_initm(struct mdchain *mbp, struct mbuf *m);
84void md_done(struct mdchain *mdp);
85void md_append_record(struct mdchain *mdp, struct mbuf *top);
86int md_next_record(struct mdchain *mdp);
87int md_get_uint8(struct mdchain *mdp, u_int8_t *x);
88int md_get_uint16(struct mdchain *mdp, u_int16_t *x);
89int md_get_uint16le(struct mdchain *mdp, u_int16_t *x);
90int md_get_uint16be(struct mdchain *mdp, u_int16_t *x);
91int md_get_uint32(struct mdchain *mdp, u_int32_t *x);
92int md_get_uint32be(struct mdchain *mdp, u_int32_t *x);
93int md_get_uint32le(struct mdchain *mdp, u_int32_t *x);
94int md_get_int64(struct mdchain *mdp, int64_t *x);
95int md_get_int64be(struct mdchain *mdp, int64_t *x);
96int md_get_int64le(struct mdchain *mdp, int64_t *x);
97int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type);
98int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m);
99int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size);
100
101#endif /* ifdef _KERNEL */
102
103#endif /* !_SYS_MCHAIN_H_ */