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 #include <machine/endian.h> 41 42 /* 43 * This macros probably belongs to the endian.h 44 */ 45 #if _BYTE_ORDER == _LITTLE_ENDIAN 46 47 #define htoles(x) ((u_int16_t)(x)) 48 #define letohs(x) ((u_int16_t)(x)) 49 #define htolel(x) ((u_int32_t)(x)) 50 #define letohl(x) ((u_int32_t)(x)) 51 #define htoleq(x) ((int64_t)(x)) 52 #define letohq(x) ((int64_t)(x)) 53 54 #define htobes(x) (__htons(x)) 55 #define betohs(x) (__ntohs(x)) 56 #define htobel(x) (__htonl(x)) 57 #define betohl(x) (__ntohl(x)) 58 59 static __inline int64_t 60 htobeq(int64_t x) 61 { 62 return (int64_t)__htonl((u_int32_t)(x >> 32)) | 63 (int64_t)__htonl((u_int32_t)(x & 0xffffffff)) << 32; 64 } 65 66 static __inline int64_t 67 betohq(int64_t x) 68 { 69 return (int64_t)__ntohl((u_int32_t)(x >> 32)) | 70 (int64_t)__ntohl((u_int32_t)(x & 0xffffffff)) << 32; 71 } 72 73 #else /* (BYTE_ORDER == LITTLE_ENDIAN) */ 74 75 #error "Macros for Big-Endians are incomplete" 76 77 /* 78 #define htoles(x) ((u_int16_t)(x)) 79 #define letohs(x) ((u_int16_t)(x)) 80 #define htolel(x) ((u_int32_t)(x)) 81 #define letohl(x) ((u_int32_t)(x)) 82 */ 83 #endif /* (BYTE_ORDER == LITTLE_ENDIAN) */ 84 85 86 #ifdef _KERNEL 87 88 /* 89 * Type of copy for mb_{put|get}_mem() 90 */ 91 #define MB_MSYSTEM 0 /* use bcopy() */ 92 #define MB_MUSER 1 /* use copyin()/copyout() */ 93 #define MB_MINLINE 2 /* use an inline copy loop */ 94 #define MB_MZERO 3 /* bzero(), mb_put_mem only */ 95 #define MB_MCUSTOM 4 /* use an user defined function */ 96 97 struct mbuf; 98 struct mbchain; 99 struct uio; 100 101 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, size_t len); 102 103 struct mbchain { 104 struct mbuf * mb_top; /* head of mbufs chain */ 105 struct mbuf * mb_cur; /* current mbuf */ 106 int mb_mleft; /* free space in the current mbuf */ 107 int mb_count; /* total number of bytes */ 108 mb_copy_t * mb_copy; /* user defined copy function */ 109 void * mb_udata; /* user data */ 110 }; 111 112 struct mdchain { 113 struct mbuf * md_top; /* head of mbufs chain */ 114 struct mbuf * md_cur; /* current mbuf */ 115 u_char * md_pos; /* offset in the current mbuf */ 116 }; 117 118 int m_fixhdr(struct mbuf *m); 119 120 int mb_init(struct mbchain *mbp); 121 void mb_initm(struct mbchain *mbp, struct mbuf *m); 122 void mb_done(struct mbchain *mbp); 123 struct mbuf *mb_detach(struct mbchain *mbp); 124 int mb_fixhdr(struct mbchain *mbp); 125 caddr_t mb_reserve(struct mbchain *mbp, int size); 126 127 int mb_put_uint8(struct mbchain *mbp, u_int8_t x); 128 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x); 129 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x); 130 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x); 131 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x); 132 int mb_put_int64be(struct mbchain *mbp, int64_t x); 133 int mb_put_int64le(struct mbchain *mbp, int64_t x); 134 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type); 135 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m); 136 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size); 137 138 int md_init(struct mdchain *mdp); 139 void md_initm(struct mdchain *mbp, struct mbuf *m); 140 void md_done(struct mdchain *mdp); 141 void md_append_record(struct mdchain *mdp, struct mbuf *top); 142 int md_next_record(struct mdchain *mdp); 143 int md_get_uint8(struct mdchain *mdp, u_int8_t *x); 144 int md_get_uint16(struct mdchain *mdp, u_int16_t *x); 145 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x); 146 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x); 147 int md_get_uint32(struct mdchain *mdp, u_int32_t *x); 148 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x); 149 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x); 150 int md_get_int64(struct mdchain *mdp, int64_t *x); 151 int md_get_int64be(struct mdchain *mdp, int64_t *x); 152 int md_get_int64le(struct mdchain *mdp, int64_t *x); 153 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type); 154 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m); 155 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size); 156 157 #endif /* ifdef _KERNEL */ 158 159 #endif /* !_SYS_MCHAIN_H_ */ 160