1 /*- 2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/ppp/ua.h,v 1.3 1999/08/28 01:18:49 peter Exp $ 27 * $DragonFly: src/usr.sbin/ppp/ua.h,v 1.2 2003/06/17 04:30:01 dillon Exp $ 28 */ 29 30 #ifdef __i386__ /* Do any other archs not care about alignment ? */ 31 32 # define ua_htonl(src, tgt) (*(u_int32_t *)(tgt) = htonl(*(u_int32_t *)(src))) 33 # define ua_ntohl(src, tgt) (*(u_int32_t *)(tgt) = ntohl(*(u_int32_t *)(src))) 34 # define ua_htons(src, tgt) (*(u_int16_t *)(tgt) = htons(*(u_int16_t *)(src))) 35 # define ua_ntohs(src, tgt) (*(u_int16_t *)(tgt) = ntohs(*(u_int16_t *)(src))) 36 37 #else /* We care about alignment (or else drop a core !) */ 38 39 # define ua_htonl(src, tgt) \ 40 do { \ 41 u_int32_t __oh; \ 42 memcpy(&__oh, (src), sizeof __oh); \ 43 *(u_char *)(tgt) = __oh >> 24; \ 44 *((u_char *)(tgt) + 1) = (__oh >> 16) & 0xff; \ 45 *((u_char *)(tgt) + 2) = (__oh >> 8) & 0xff; \ 46 *((u_char *)(tgt) + 3) = __oh & 0xff; \ 47 } while (0) 48 49 # define ua_ntohl(src, tgt) \ 50 do { \ 51 u_int32_t __nh; \ 52 __nh = ((u_int32_t)*(u_char *)(src) << 24) | \ 53 ((u_int32_t)*((u_char *)(src) + 1) << 16) | \ 54 ((u_int32_t)*((u_char *)(src) + 2) << 8) | \ 55 (u_int32_t)*((u_char *)(src) + 3); \ 56 memcpy((tgt), &__nh, sizeof __nh); \ 57 } while (0) 58 59 # define ua_htons(src, tgt) \ 60 do { \ 61 u_int16_t __oh; \ 62 memcpy(&__oh, (src), sizeof __oh); \ 63 *(u_char *)(tgt) = __oh >> 8; \ 64 *((u_char *)(tgt) + 1) = __oh & 0xff; \ 65 } while (0) 66 67 # define ua_ntohs(src, tgt) \ 68 do { \ 69 u_int16_t __nh; \ 70 __nh = ((u_int16_t)*(u_char *)(src) << 8) | \ 71 (u_int16_t)*((u_char *)(src) + 1); \ 72 memcpy((tgt), &__nh, sizeof __nh); \ 73 } while (0) 74 75 #endif 76