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 * $DragonFly: src/sys/sys/mchain.h,v 1.4 2006/05/20 02:42:13 dillon Exp $ 34 */ 35 #ifndef _SYS_MCHAIN_H_ 36 #define _SYS_MCHAIN_H_ 37 38 #ifndef _SYS_TYPES_H_ 39 #include <sys/types.h> 40 #endif 41 #ifndef _MACHINE_ENDIAN_H_ 42 #include <machine/endian.h> 43 #endif 44 45 /* 46 * This macros probably belongs to the endian.h 47 */ 48 #if _BYTE_ORDER == _LITTLE_ENDIAN 49 50 #define htoles(x) ((u_int16_t)(x)) 51 #define letohs(x) ((u_int16_t)(x)) 52 #define htolel(x) ((u_int32_t)(x)) 53 #define letohl(x) ((u_int32_t)(x)) 54 #define htoleq(x) ((int64_t)(x)) 55 #define letohq(x) ((int64_t)(x)) 56 57 #define htobes(x) (__htons(x)) 58 #define betohs(x) (__ntohs(x)) 59 #define htobel(x) (__htonl(x)) 60 #define betohl(x) (__ntohl(x)) 61 62 static __inline int64_t 63 htobeq(int64_t x) 64 { 65 return (int64_t)__htonl((u_int32_t)(x >> 32)) | 66 (int64_t)__htonl((u_int32_t)(x & 0xffffffff)) << 32; 67 } 68 69 static __inline int64_t 70 betohq(int64_t x) 71 { 72 return (int64_t)__ntohl((u_int32_t)(x >> 32)) | 73 (int64_t)__ntohl((u_int32_t)(x & 0xffffffff)) << 32; 74 } 75 76 #else /* (BYTE_ORDER == LITTLE_ENDIAN) */ 77 78 #error "Macros for Big-Endians are incomplete" 79 80 /* 81 #define htoles(x) ((u_int16_t)(x)) 82 #define letohs(x) ((u_int16_t)(x)) 83 #define htolel(x) ((u_int32_t)(x)) 84 #define letohl(x) ((u_int32_t)(x)) 85 */ 86 #endif /* (BYTE_ORDER == LITTLE_ENDIAN) */ 87 88 89 #ifdef _KERNEL 90 91 /* 92 * Type of copy for mb_{put|get}_mem() 93 */ 94 #define MB_MSYSTEM 0 /* use bcopy() */ 95 #define MB_MUSER 1 /* use copyin()/copyout() */ 96 #define MB_MINLINE 2 /* use an inline copy loop */ 97 #define MB_MZERO 3 /* bzero(), mb_put_mem only */ 98 #define MB_MCUSTOM 4 /* use an user defined function */ 99 100 struct mbuf; 101 struct mbchain; 102 struct uio; 103 104 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, size_t len); 105 106 struct mbchain { 107 struct mbuf * mb_top; /* head of mbufs chain */ 108 struct mbuf * mb_cur; /* current mbuf */ 109 int mb_mleft; /* free space in the current mbuf */ 110 int mb_count; /* total number of bytes */ 111 mb_copy_t * mb_copy; /* user defined copy function */ 112 void * mb_udata; /* user data */ 113 }; 114 115 struct mdchain { 116 struct mbuf * md_top; /* head of mbufs chain */ 117 struct mbuf * md_cur; /* current mbuf */ 118 u_char * md_pos; /* offset in the current mbuf */ 119 }; 120 121 int m_fixhdr(struct mbuf *m); 122 123 int mb_init(struct mbchain *mbp); 124 void mb_initm(struct mbchain *mbp, struct mbuf *m); 125 void mb_done(struct mbchain *mbp); 126 struct mbuf *mb_detach(struct mbchain *mbp); 127 int mb_fixhdr(struct mbchain *mbp); 128 caddr_t mb_reserve(struct mbchain *mbp, int size); 129 130 int mb_put_uint8(struct mbchain *mbp, u_int8_t x); 131 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x); 132 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x); 133 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x); 134 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x); 135 int mb_put_int64be(struct mbchain *mbp, int64_t x); 136 int mb_put_int64le(struct mbchain *mbp, int64_t x); 137 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type); 138 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m); 139 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size); 140 141 int md_init(struct mdchain *mdp); 142 void md_initm(struct mdchain *mbp, struct mbuf *m); 143 void md_done(struct mdchain *mdp); 144 void md_append_record(struct mdchain *mdp, struct mbuf *top); 145 int md_next_record(struct mdchain *mdp); 146 int md_get_uint8(struct mdchain *mdp, u_int8_t *x); 147 int md_get_uint16(struct mdchain *mdp, u_int16_t *x); 148 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x); 149 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x); 150 int md_get_uint32(struct mdchain *mdp, u_int32_t *x); 151 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x); 152 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x); 153 int md_get_int64(struct mdchain *mdp, int64_t *x); 154 int md_get_int64be(struct mdchain *mdp, int64_t *x); 155 int md_get_int64le(struct mdchain *mdp, int64_t *x); 156 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type); 157 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m); 158 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size); 159 160 #endif /* ifdef _KERNEL */ 161 162 #endif /* !_SYS_MCHAIN_H_ */ 163