1 /* $OpenBSD: ddp.h,v 1.1 1997/07/23 03:39:53 denny Exp $ */ 2 3 /* 4 * Copyright (c) 1990,1991 Regents of The University of Michigan. 5 * All Rights Reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software and 8 * its documentation for any purpose and without fee is hereby granted, 9 * provided that the above copyright notice appears in all copies and 10 * that both that copyright notice and this permission notice appear 11 * in supporting documentation, and that the name of The University 12 * of Michigan not be used in advertising or publicity pertaining to 13 * distribution of the software without specific, written prior 14 * permission. This software is supplied as is without expressed or 15 * implied warranties of any kind. 16 * 17 * Research Systems Unix Group 18 * The University of Michigan 19 * c/o Mike Clark 20 * 535 W. William Street 21 * Ann Arbor, Michigan 22 * +1-313-763-0525 23 * netatalk@itd.umich.edu 24 */ 25 26 /* 27 * The following is the contents of the COPYRIGHT file from the 28 * netatalk-1.4a2 distribution, from which this file is derived. 29 */ 30 /* 31 * Copyright (c) 1990,1996 Regents of The University of Michigan. 32 * 33 * All Rights Reserved. 34 * 35 * Permission to use, copy, modify, and distribute this software and 36 * its documentation for any purpose and without fee is hereby granted, 37 * provided that the above copyright notice appears in all copies and 38 * that both that copyright notice and this permission notice appear 39 * in supporting documentation, and that the name of The University 40 * of Michigan not be used in advertising or publicity pertaining to 41 * distribution of the software without specific, written prior 42 * permission. This software is supplied as is without expressed or 43 * implied warranties of any kind. 44 * 45 * This product includes software developed by the University of 46 * California, Berkeley and its contributors. 47 * 48 * Solaris code is encumbered by the following: 49 * 50 * Copyright (C) 1996 by Sun Microsystems Computer Co. 51 * 52 * Permission to use, copy, modify, and distribute this software and 53 * its documentation for any purpose and without fee is hereby 54 * granted, provided that the above copyright notice appear in all 55 * copies and that both that copyright notice and this permission 56 * notice appear in supporting documentation. This software is 57 * provided "as is" without express or implied warranty. 58 * 59 * Research Systems Unix Group 60 * The University of Michigan 61 * c/o Wesley Craig 62 * 535 W. William Street 63 * Ann Arbor, Michigan 64 * +1-313-764-2278 65 * netatalk@umich.edu 66 */ 67 /* 68 * None of the Solaris code mentioned is included in OpenBSD. 69 * This code also relies heavily on previous effort in FreeBSD and NetBSD. 70 */ 71 72 #ifndef _NETATALK_DDP_H_ 73 #define _NETATALK_DDP_H_ 1 74 75 /* 76 * <-1byte(8bits) -> 77 * +---------------+ 78 * | 0 | hopc |len| 79 * +---------------+ 80 * | len (cont) | 81 * +---------------+ 82 * | | 83 * +- DDP csum -+ 84 * | | 85 * +---------------+ 86 * | | 87 * +- Dest NET -+ 88 * | | 89 * +---------------+ 90 * | | 91 * +- Src NET -+ 92 * | | 93 * +---------------+ 94 * | Dest NODE | 95 * +---------------+ 96 * | Src NODE | 97 * +---------------+ 98 * | Dest PORT | 99 * +---------------+ 100 * | Src PORT | 101 * +---------------+ 102 * 103 * On Apples, there is also a ddp_type field, after src_port. However, 104 * under this unix implementation, user level processes need to be able 105 * to set the ddp_type. In later revisions, the ddp_type may only be 106 * available in a raw_appletalk interface. 107 */ 108 109 struct elaphdr { 110 u_char el_dnode; 111 u_char el_snode; 112 u_char el_type; 113 }; 114 115 #define SZ_ELAPHDR 3 116 117 #define ELAP_DDPSHORT 0x01 118 #define ELAP_DDPEXTEND 0x02 119 120 /* 121 * Extended DDP header. Includes sickness for dealing with arbitrary 122 * bitfields on a little-endian arch. 123 */ 124 struct ddpehdr { 125 union { 126 struct { 127 #if BYTE_ORDER == BIG_ENDIAN 128 unsigned dub_pad:2; 129 unsigned dub_hops:4; 130 unsigned dub_len:10; 131 unsigned dub_sum:16; 132 #endif 133 #if BYTE_ORDER == LITTLE_ENDIAN 134 unsigned dub_sum:16; 135 unsigned dub_len:10; 136 unsigned dub_hops:4; 137 unsigned dub_pad:2; 138 #endif 139 } du_bits; 140 unsigned du_bytes; 141 } deh_u; 142 #define deh_pad deh_u.du_bits.dub_pad 143 #define deh_hops deh_u.du_bits.dub_hops 144 #define deh_len deh_u.du_bits.dub_len 145 #define deh_sum deh_u.du_bits.dub_sum 146 #define deh_bytes deh_u.du_bytes 147 u_short deh_dnet; 148 u_short deh_snet; 149 u_char deh_dnode; 150 u_char deh_snode; 151 u_char deh_dport; 152 u_char deh_sport; 153 }; 154 155 #define DDP_MAXHOPS 15 156 157 struct ddpshdr { 158 union { 159 struct { 160 #if BYTE_ORDER == BIG_ENDIAN 161 unsigned dub_pad:6; 162 unsigned dub_len:10; 163 unsigned dub_dport:8; 164 unsigned dub_sport:8; 165 #endif 166 #if BYTE_ORDER == LITTLE_ENDIAN 167 unsigned dub_sport:8; 168 unsigned dub_dport:8; 169 unsigned dub_len:10; 170 unsigned dub_pad:6; 171 #endif 172 } du_bits; 173 unsigned du_bytes; 174 } dsh_u; 175 #define dsh_pad dsh_u.du_bits.dub_pad 176 #define dsh_len dsh_u.du_bits.dub_len 177 #define dsh_dport dsh_u.du_bits.dub_dport 178 #define dsh_sport dsh_u.du_bits.dub_sport 179 #define dsh_bytes dsh_u.du_bytes 180 }; 181 #endif /* _NETATALK_DDP_H_ */ 182