sys/sys/mchain.h

   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: src/sys/sys/mchain.h,v 1.1.2.1 2001/05/18 11:01:23 bp Exp $
  33  */
  34 #ifndef _SYS_MCHAIN_H_
  35 #define _SYS_MCHAIN_H_
  36
  37 #ifndef _SYS_TYPES_H_
  38 #include <sys/types.h>
  39 #endif
  40
  41 #ifdef _KERNEL
  42
  43 /*
  44  * Type of copy for mb_{put|get}_mem()
  45  */
  46 #define MB_MSYSTEM      0               /* use bcopy() */
  47 #define MB_MUSER        1               /* use copyin()/copyout() */
  48 #define MB_MINLINE      2               /* use an inline copy loop */
  49 #define MB_MZERO        3               /* bzero(), mb_put_mem only */
  50 #define MB_MCUSTOM      4               /* use an user defined function */
  51
  52 struct mbuf;
  53 struct mbchain;
  54 struct uio;
  55
  56 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
  57     size_t *srclen, size_t *dstlen);
  58
  59 struct mbchain {
  60         struct mbuf *   mb_top;         /* head of mbufs chain */
  61         struct mbuf *   mb_cur;         /* current mbuf */
  62         int             mb_mleft;       /* free space in the current mbuf */
  63         int             mb_count;       /* total number of bytes */
  64         mb_copy_t *     mb_copy;        /* user defined copy function */
  65         void *          mb_udata;       /* user data */
  66 };
  67
  68 struct mdchain {
  69         struct mbuf *   md_top;         /* head of mbufs chain */
  70         struct mbuf *   md_cur;         /* current mbuf */
  71         u_char *        md_pos;         /* offset in the current mbuf */
  72 };
  73
  74 int  m_fixhdr(struct mbuf *m);
  75
  76 int  mb_init(struct mbchain *mbp);
  77 void mb_initm(struct mbchain *mbp, struct mbuf *m);
  78 void mb_done(struct mbchain *mbp);
  79 struct mbuf *mb_detach(struct mbchain *mbp);
  80 int  mb_fixhdr(struct mbchain *mbp);
  81 caddr_t mb_reserve(struct mbchain *mbp, int size);
  82
  83 int  mb_put_uint8(struct mbchain *mbp, u_int8_t x);
  84 int  mb_put_uint16be(struct mbchain *mbp, u_int16_t x);
  85 int  mb_put_uint16le(struct mbchain *mbp, u_int16_t x);
  86 int  mb_put_uint32be(struct mbchain *mbp, u_int32_t x);
  87 int  mb_put_uint32le(struct mbchain *mbp, u_int32_t x);
  88 int  mb_put_int64be(struct mbchain *mbp, int64_t x);
  89 int  mb_put_int64le(struct mbchain *mbp, int64_t x);
  90 int  mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type);
  91 int  mb_put_mbuf(struct mbchain *mbp, struct mbuf *m);
  92 int  mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size);
  93
  94 int  md_init(struct mdchain *mdp);
  95 void md_initm(struct mdchain *mbp, struct mbuf *m);
  96 void md_done(struct mdchain *mdp);
  97 void md_append_record(struct mdchain *mdp, struct mbuf *top);
  98 int  md_next_record(struct mdchain *mdp);
  99 int  md_get_uint8(struct mdchain *mdp, u_int8_t *x);
 100 int  md_get_uint16(struct mdchain *mdp, u_int16_t *x);
 101 int  md_get_uint16le(struct mdchain *mdp, u_int16_t *x);
 102 int  md_get_uint16be(struct mdchain *mdp, u_int16_t *x);
 103 int  md_get_uint32(struct mdchain *mdp, u_int32_t *x);
 104 int  md_get_uint32be(struct mdchain *mdp, u_int32_t *x);
 105 int  md_get_uint32le(struct mdchain *mdp, u_int32_t *x);
 106 int  md_get_int64(struct mdchain *mdp, int64_t *x);
 107 int  md_get_int64be(struct mdchain *mdp, int64_t *x);
 108 int  md_get_int64le(struct mdchain *mdp, int64_t *x);
 109 int  md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type);
 110 int  md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m);
 111 int  md_get_uio(struct mdchain *mdp, struct uio *uiop, int size);
 112
 113 #endif  /* ifdef _KERNEL */
 114
 115 #endif  /* !_SYS_MCHAIN_H_ */