1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28/* All Rights Reserved */ 29 30/* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40#ifndef _SYS_BYTEORDER_H 41#define _SYS_BYTEORDER_H 42 43#if defined(__GNUC__) && defined(_ASM_INLINES) && \ 44 (defined(__i386) || defined(__amd64)) 45#include <asm/byteorder.h> 46#endif 47 48#include <sys/isa_defs.h> 49#include <inttypes.h> 50 51#ifdef __cplusplus 52extern "C" { 53#endif 54 55/* 56 * macros for conversion between host and (internet) network byte order 57 */ 58 59#if defined(_ZFS_BIG_ENDIAN) && !defined(ntohl) && !defined(__lint) 60/* big-endian */ 61#define ntohl(x) (x) 62#define ntohs(x) (x) 63#define htonl(x) (x) 64#define htons(x) (x) 65 66#elif !defined(ntohl) /* little-endian */ 67 68#ifndef _IN_PORT_T 69#define _IN_PORT_T 70typedef uint16_t in_port_t; 71#endif 72 73#ifndef _IN_ADDR_T 74#define _IN_ADDR_T 75typedef uint32_t in_addr_t; 76#endif 77 78#if !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) 79extern uint32_t htonl(uint32_t); 80extern uint16_t htons(uint16_t); 81extern uint32_t ntohl(uint32_t); 82extern uint16_t ntohs(uint16_t); 83#else 84extern in_addr_t htonl(in_addr_t); 85extern in_port_t htons(in_port_t); 86extern in_addr_t ntohl(in_addr_t); 87extern in_port_t ntohs(in_port_t); 88#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) || defined(_XPG5) */ 89#endif 90 91#if !defined(_XPG4_2) || defined(__EXTENSIONS__) 92 93#ifdef __COVERITY__ 94/* 95 * Coverity's taint warnings from byteswapping are false positives for us. 96 * Suppress them by hiding byteswapping from Coverity. 97 */ 98#define BSWAP_8(x) ((x) & 0xff) 99#define BSWAP_16(x) ((x) & 0xffff) 100#define BSWAP_32(x) ((x) & 0xffffffff) 101#define BSWAP_64(x) (x) 102 103#else /* __COVERITY__ */ 104 105/* 106 * Macros to reverse byte order 107 */ 108#define BSWAP_8(x) ((x) & 0xff) 109#define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8)) 110#define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16)) 111#define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32)) 112 113#endif /* __COVERITY__ */ 114 115#define BMASK_8(x) ((x) & 0xff) 116#define BMASK_16(x) ((x) & 0xffff) 117#define BMASK_32(x) ((x) & 0xffffffff) 118#define BMASK_64(x) (x) 119 120/* 121 * Macros to convert from a specific byte order to/from native byte order 122 */ 123#ifdef _ZFS_BIG_ENDIAN 124#define BE_8(x) BMASK_8(x) 125#define BE_16(x) BMASK_16(x) 126#define BE_32(x) BMASK_32(x) 127#define BE_64(x) BMASK_64(x) 128#define LE_8(x) BSWAP_8(x) 129#define LE_16(x) BSWAP_16(x) 130#define LE_32(x) BSWAP_32(x) 131#define LE_64(x) BSWAP_64(x) 132#else 133#define LE_8(x) BMASK_8(x) 134#define LE_16(x) BMASK_16(x) 135#define LE_32(x) BMASK_32(x) 136#define LE_64(x) BMASK_64(x) 137#define BE_8(x) BSWAP_8(x) 138#define BE_16(x) BSWAP_16(x) 139#define BE_32(x) BSWAP_32(x) 140#define BE_64(x) BSWAP_64(x) 141#endif 142 143#ifdef _ZFS_BIG_ENDIAN 144static __inline__ uint64_t 145htonll(uint64_t n) 146{ 147 return (n); 148} 149 150static __inline__ uint64_t 151ntohll(uint64_t n) 152{ 153 return (n); 154} 155#else 156static __inline__ uint64_t 157htonll(uint64_t n) 158{ 159 return ((((uint64_t)htonl(n)) << 32) + htonl(n >> 32)); 160} 161 162static __inline__ uint64_t 163ntohll(uint64_t n) 164{ 165 return ((((uint64_t)ntohl(n)) << 32) + ntohl(n >> 32)); 166} 167#endif 168 169/* 170 * Macros to read unaligned values from a specific byte order to 171 * native byte order 172 */ 173 174#define BE_IN8(xa) \ 175 *((uint8_t *)(xa)) 176 177#define BE_IN16(xa) \ 178 (((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa)+1)) 179 180#define BE_IN32(xa) \ 181 (((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa)+2)) 182 183#define BE_IN64(xa) \ 184 (((uint64_t)BE_IN32(xa) << 32) | BE_IN32((uint8_t *)(xa)+4)) 185 186#define LE_IN8(xa) \ 187 *((uint8_t *)(xa)) 188 189#define LE_IN16(xa) \ 190 (((uint16_t)LE_IN8((uint8_t *)(xa) + 1) << 8) | LE_IN8(xa)) 191 192#define LE_IN32(xa) \ 193 (((uint32_t)LE_IN16((uint8_t *)(xa) + 2) << 16) | LE_IN16(xa)) 194 195#define LE_IN64(xa) \ 196 (((uint64_t)LE_IN32((uint8_t *)(xa) + 4) << 32) | LE_IN32(xa)) 197 198/* 199 * Macros to write unaligned values from native byte order to a specific byte 200 * order. 201 */ 202 203#define BE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv); 204 205#define BE_OUT16(xa, yv) \ 206 BE_OUT8((uint8_t *)(xa) + 1, yv); \ 207 BE_OUT8((uint8_t *)(xa), (yv) >> 8); 208 209#define BE_OUT32(xa, yv) \ 210 BE_OUT16((uint8_t *)(xa) + 2, yv); \ 211 BE_OUT16((uint8_t *)(xa), (yv) >> 16); 212 213#define BE_OUT64(xa, yv) \ 214 BE_OUT32((uint8_t *)(xa) + 4, yv); \ 215 BE_OUT32((uint8_t *)(xa), (yv) >> 32); 216 217#define LE_OUT8(xa, yv) *((uint8_t *)(xa)) = (uint8_t)(yv); 218 219#define LE_OUT16(xa, yv) \ 220 LE_OUT8((uint8_t *)(xa), yv); \ 221 LE_OUT8((uint8_t *)(xa) + 1, (yv) >> 8); 222 223#define LE_OUT32(xa, yv) \ 224 LE_OUT16((uint8_t *)(xa), yv); \ 225 LE_OUT16((uint8_t *)(xa) + 2, (yv) >> 16); 226 227#define LE_OUT64(xa, yv) \ 228 LE_OUT32((uint8_t *)(xa), yv); \ 229 LE_OUT32((uint8_t *)(xa) + 4, (yv) >> 32); 230 231#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 232 233#ifdef __cplusplus 234} 235#endif 236 237#endif /* _SYS_BYTEORDER_H */ 238