1 /*- 2 * Copyright (c) 2000, 2001 Boris Popov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Boris Popov. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 #ifndef _SYS_MCHAIN_H_ 35 #define _SYS_MCHAIN_H_ 36 37 #ifdef _KERNEL 38 39 /* 40 * Type of copy for mb_{put|get}_mem() 41 */ 42 #define MB_MSYSTEM 0 /* use bcopy() */ 43 #define MB_MUSER 1 /* use copyin()/copyout() */ 44 #define MB_MINLINE 2 /* use an inline copy loop */ 45 #define MB_MZERO 3 /* bzero(), mb_put_mem only */ 46 #define MB_MCUSTOM 4 /* use an user defined function */ 47 48 struct mbuf; 49 struct mbchain; 50 51 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, 52 size_t *srclen, size_t *dstlen); 53 54 struct mbchain { 55 struct mbuf * mb_top; /* head of mbufs chain */ 56 struct mbuf * mb_cur; /* current mbuf */ 57 int mb_mleft; /* free space in the current mbuf */ 58 int mb_count; /* total number of bytes */ 59 mb_copy_t * mb_copy; /* user defined copy function */ 60 void * mb_udata; /* user data */ 61 }; 62 63 struct mdchain { 64 struct mbuf * md_top; /* head of mbufs chain */ 65 struct mbuf * md_cur; /* current mbuf */ 66 u_char * md_pos; /* offset in the current mbuf */ 67 }; 68 69 int mb_init(struct mbchain *mbp); 70 void mb_initm(struct mbchain *mbp, struct mbuf *m); 71 void mb_done(struct mbchain *mbp); 72 struct mbuf *mb_detach(struct mbchain *mbp); 73 int mb_fixhdr(struct mbchain *mbp); 74 caddr_t mb_reserve(struct mbchain *mbp, int size); 75 76 int mb_put_uint8(struct mbchain *mbp, u_int8_t x); 77 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x); 78 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x); 79 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x); 80 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x); 81 int mb_put_int64be(struct mbchain *mbp, int64_t x); 82 int mb_put_int64le(struct mbchain *mbp, int64_t x); 83 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type); 84 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m); 85 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size); 86 87 int md_init(struct mdchain *mdp); 88 void md_initm(struct mdchain *mbp, struct mbuf *m); 89 void md_done(struct mdchain *mdp); 90 void md_append_record(struct mdchain *mdp, struct mbuf *top); 91 int md_next_record(struct mdchain *mdp); 92 int md_get_uint8(struct mdchain *mdp, u_int8_t *x); 93 int md_get_uint16(struct mdchain *mdp, u_int16_t *x); 94 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x); 95 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x); 96 int md_get_uint32(struct mdchain *mdp, u_int32_t *x); 97 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x); 98 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x); 99 int md_get_int64(struct mdchain *mdp, int64_t *x); 100 int md_get_int64be(struct mdchain *mdp, int64_t *x); 101 int md_get_int64le(struct mdchain *mdp, int64_t *x); 102 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type); 103 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m); 104 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size); 105 106 #endif /* ifdef _KERNEL */ 107 108 #endif /* !_SYS_MCHAIN_H_ */ 109