1 /*- 2 * Copyright (c) 1998 Brian Somers <brian (at) 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 1.3.62.1 2010/12/21 17:10:29 kensmith Exp $ 27 */ 28 29 #ifdef __i386__ /* Do any other archs not care about alignment ? */ 30 31 # define ua_htonl(src, tgt) (*(u_int32_t *)(tgt) = htonl(*(u_int32_t *)(src))) 32 # define ua_ntohl(src, tgt) (*(u_int32_t *)(tgt) = ntohl(*(u_int32_t *)(src))) 33 # define ua_htons(src, tgt) (*(u_int16_t *)(tgt) = htons(*(u_int16_t *)(src))) 34 # define ua_ntohs(src, tgt) (*(u_int16_t *)(tgt) = ntohs(*(u_int16_t *)(src))) 35 36 #else /* We care about alignment (or else drop a core !) */ 37 38 # define ua_htonl(src, tgt) \ 39 do { \ 40 u_int32_t __oh; \ 41 memcpy(&__oh, (src), sizeof __oh); \ 42 *(u_char *)(tgt) = __oh >> 24; \ 43 *((u_char *)(tgt) + 1) = (__oh >> 16) & 0xff; \ 44 *((u_char *)(tgt) + 2) = (__oh >> 8) & 0xff; \ 45 *((u_char *)(tgt) + 3) = __oh & 0xff; \ 46 } while (0) 47 48 # define ua_ntohl(src, tgt) \ 49 do { \ 50 u_int32_t __nh; \ 51 __nh = ((u_int32_t)*(u_char *)(src) << 24) | \ 52 ((u_int32_t)*((u_char *)(src) + 1) << 16) | \ 53 ((u_int32_t)*((u_char *)(src) + 2) << 8) | \ 54 (u_int32_t)*((u_char *)(src) + 3); \ 55 memcpy((tgt), &__nh, sizeof __nh); \ 56 } while (0) 57 58 # define ua_htons(src, tgt) \ 59 do { \ 60 u_int16_t __oh; \ 61 memcpy(&__oh, (src), sizeof __oh); \ 62 *(u_char *)(tgt) = __oh >> 8; \ 63 *((u_char *)(tgt) + 1) = __oh & 0xff; \ 64 } while (0) 65 66 # define ua_ntohs(src, tgt) \ 67 do { \ 68 u_int16_t __nh; \ 69 __nh = ((u_int16_t)*(u_char *)(src) << 8) | \ 70 (u_int16_t)*((u_char *)(src) + 1); \ 71 memcpy((tgt), &__nh, sizeof __nh); \ 72 } while (0) 73 74 #endif 75
