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 1.3 2004/09/23 16:11:47 joerg Exp $ 34 */ 35 #ifndef _SYS_MCHAIN_H_ 36 #define _SYS_MCHAIN_H_ 37 38 #include <machine/endian.h> 39 40 /* 41 * This macros probably belongs to the endian.h 42 */ 43 #if _BYTE_ORDER == _LITTLE_ENDIAN 44 45 #define htoles(x) ((u_int16_t)(x)) 46 #define letohs(x) ((u_int16_t)(x)) 47 #define htolel(x) ((u_int32_t)(x)) 48 #define letohl(x) ((u_int32_t)(x)) 49 #define htoleq(x) ((int64_t)(x)) 50 #define letohq(x) ((int64_t)(x)) 51 52 #define htobes(x) (htons(x)) 53 #define betohs(x) (ntohs(x)) 54 #define htobel(x) (htonl(x)) 55 #define betohl(x) (ntohl(x)) 56 57 static __inline int64_t 58 htobeq(int64_t x) 59 { 60 return (int64_t)htonl((u_int32_t)(x >> 32)) | 61 (int64_t)htonl((u_int32_t)(x & 0xffffffff)) << 32; 62 } 63 64 static __inline int64_t 65 betohq(int64_t x) 66 { 67 return (int64_t)ntohl((u_int32_t)(x >> 32)) | 68 (int64_t)ntohl((u_int32_t)(x & 0xffffffff)) << 32; 69 } 70 71 #else /* (BYTE_ORDER == LITTLE_ENDIAN) */ 72 73 #error "Macros for Big-Endians are incomplete" 74 75 /* 76 #define htoles(x) ((u_int16_t)(x)) 77 #define letohs(x) ((u_int16_t)(x)) 78 #define htolel(x) ((u_int32_t)(x)) 79 #define letohl(x) ((u_int32_t)(x)) 80 */ 81 #endif /* (BYTE_ORDER == LITTLE_ENDIAN) */ 82 83 84 #ifdef _KERNEL 85 86 /* 87 * Type of copy for mb_{put|get}_mem() 88 */ 89 #define MB_MSYSTEM 0 /* use bcopy() */ 90 #define MB_MUSER 1 /* use copyin()/copyout() */ 91 #define MB_MINLINE 2 /* use an inline copy loop */ 92 #define MB_MZERO 3 /* bzero(), mb_put_mem only */ 93 #define MB_MCUSTOM 4 /* use an user defined function */ 94 95 struct mbuf; 96 struct mbchain; 97 98 typedef int mb_copy_t(struct mbchain *mbp, c_caddr_t src, caddr_t dst, int len); 99 100 struct mbchain { 101 struct mbuf * mb_top; /* head of mbufs chain */ 102 struct mbuf * mb_cur; /* current mbuf */ 103 int mb_mleft; /* free space in the current mbuf */ 104 int mb_count; /* total number of bytes */ 105 mb_copy_t * mb_copy; /* user defined copy function */ 106 void * mb_udata; /* user data */ 107 }; 108 109 struct mdchain { 110 struct mbuf * md_top; /* head of mbufs chain */ 111 struct mbuf * md_cur; /* current mbuf */ 112 u_char * md_pos; /* offset in the current mbuf */ 113 }; 114 115 int m_fixhdr(struct mbuf *m); 116 117 int mb_init(struct mbchain *mbp); 118 void mb_initm(struct mbchain *mbp, struct mbuf *m); 119 void mb_done(struct mbchain *mbp); 120 struct mbuf *mb_detach(struct mbchain *mbp); 121 int mb_fixhdr(struct mbchain *mbp); 122 caddr_t mb_reserve(struct mbchain *mbp, int size); 123 124 int mb_put_uint8(struct mbchain *mbp, u_int8_t x); 125 int mb_put_uint16be(struct mbchain *mbp, u_int16_t x); 126 int mb_put_uint16le(struct mbchain *mbp, u_int16_t x); 127 int mb_put_uint32be(struct mbchain *mbp, u_int32_t x); 128 int mb_put_uint32le(struct mbchain *mbp, u_int32_t x); 129 int mb_put_int64be(struct mbchain *mbp, int64_t x); 130 int mb_put_int64le(struct mbchain *mbp, int64_t x); 131 int mb_put_mem(struct mbchain *mbp, c_caddr_t source, int size, int type); 132 int mb_put_mbuf(struct mbchain *mbp, struct mbuf *m); 133 int mb_put_uio(struct mbchain *mbp, struct uio *uiop, int size); 134 135 int md_init(struct mdchain *mdp); 136 void md_initm(struct mdchain *mbp, struct mbuf *m); 137 void md_done(struct mdchain *mdp); 138 void md_append_record(struct mdchain *mdp, struct mbuf *top); 139 int md_next_record(struct mdchain *mdp); 140 int md_get_uint8(struct mdchain *mdp, u_int8_t *x); 141 int md_get_uint16(struct mdchain *mdp, u_int16_t *x); 142 int md_get_uint16le(struct mdchain *mdp, u_int16_t *x); 143 int md_get_uint16be(struct mdchain *mdp, u_int16_t *x); 144 int md_get_uint32(struct mdchain *mdp, u_int32_t *x); 145 int md_get_uint32be(struct mdchain *mdp, u_int32_t *x); 146 int md_get_uint32le(struct mdchain *mdp, u_int32_t *x); 147 int md_get_int64(struct mdchain *mdp, int64_t *x); 148 int md_get_int64be(struct mdchain *mdp, int64_t *x); 149 int md_get_int64le(struct mdchain *mdp, int64_t *x); 150 int md_get_mem(struct mdchain *mdp, caddr_t target, int size, int type); 151 int md_get_mbuf(struct mdchain *mdp, int size, struct mbuf **m); 152 int md_get_uio(struct mdchain *mdp, struct uio *uiop, int size); 153 154 #endif /* ifdef _KERNEL */ 155 156 #endif /* !_SYS_MCHAIN_H_ */ 157