2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2000, 2001 Boris Popov
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
30 #ifndef _SYS_MCHAIN_H_
31 #define _SYS_MCHAIN_H_
36 * Type of copy for mb_{put|get}_mem()
38 #define MB_MSYSTEM 0 /* use bcopy() */
39 #define MB_MUSER 1 /* use copyin()/copyout() */
40 #define MB_MINLINE 2 /* use an inline copy loop */
41 #define MB_MZERO 3 /* bzero(), mb_put_mem only */
42 #define MB_MCUSTOM 4 /* use an user defined function */
47 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
48 size_t *srclen, size_t *dstlen);
51 struct mbuf * mb_top; /* head of mbufs chain */
52 struct mbuf * mb_cur; /* current mbuf */
53 int mb_mleft; /* free space in the current mbuf */
54 int mb_count; /* total number of bytes */
55 mb_copy_t * mb_copy; /* user defined copy function */
56 void * mb_udata; /* user data */
60 struct mbuf * md_top; /* head of mbufs chain */
61 struct mbuf * md_cur; /* current mbuf */
62 u_char * md_pos; /* offset in the current mbuf */
65 int mb_init(struct mbchain *mbp);
66 void mb_initm(struct mbchain *mbp, struct mbuf *m);
67 void mb_done(struct mbchain *mbp);
68 struct mbuf *mb_detach(struct mbchain *mbp);
69 int mb_fixhdr(struct mbchain *mbp);
70 caddr_t mb_reserve(struct mbchain *mbp, int size);
72 int mb_put_padbyte(struct mbchain *mbp);
73 int mb_put_uint8(struct mbchain *mbp, u_int8_t x);
74 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x);
75 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x);
76 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x);
77 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x);
78 int mb_put_int64be(struct mbchain *mbp, int64_t x);
79 int mb_put_int64le(struct mbchain *mbp, int64_t x);
80 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type);
81 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m);
82 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size);
84 int md_init(struct mdchain *mdp);
85 void md_initm(struct mdchain *mbp, struct mbuf *m);
86 void md_done(struct mdchain *mdp);
87 void md_append_record(struct mdchain *mdp, struct mbuf *top);
88 int md_next_record(struct mdchain *mdp);
89 int md_get_uint8(struct mdchain *mdp, u_int8_t *x);
90 int md_get_uint16(struct mdchain *mdp, u_int16_t *x);
91 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x);
92 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x);
93 int md_get_uint32(struct mdchain *mdp, u_int32_t *x);
94 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x);
95 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x);
96 int md_get_int64(struct mdchain *mdp, int64_t *x);
97 int md_get_int64be(struct mdchain *mdp, int64_t *x);
98 int md_get_int64le(struct mdchain *mdp, int64_t *x);
99 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type);
100 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m);
101 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size);
103 #endif /* ifdef _KERNEL */
105 #endif /* !_SYS_MCHAIN_H_ */