1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)tp_tpdu.h 7.4 (Berkeley) 05/06/91 8 */ 9 10 /*********************************************************** 11 Copyright IBM Corporation 1987 12 13 All Rights Reserved 14 15 Permission to use, copy, modify, and distribute this software and its 16 documentation for any purpose and without fee is hereby granted, 17 provided that the above copyright notice appear in all copies and that 18 both that copyright notice and this permission notice appear in 19 supporting documentation, and that the name of IBM not be 20 used in advertising or publicity pertaining to distribution of the 21 software without specific, written prior permission. 22 23 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 24 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 25 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 26 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 27 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 28 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 29 SOFTWARE. 30 31 ******************************************************************/ 32 33 /* 34 * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison 35 */ 36 /* 37 * ARGO TP 38 * 39 * $Header: tp_tpdu.h,v 4.4 88/07/26 16:45:40 nhall Exp $ 40 * $Source: /usr/argo/sys/netiso/RCS/tp_tpdu.h,v $ 41 * 42 * This ghastly set of macros makes it possible to 43 * refer to tpdu structures without going mad. 44 */ 45 46 #ifndef __TP_TPDU__ 47 #define __TP_TPDU__ 48 49 #ifndef BYTE_ORDER 50 /* 51 * Definitions for byte order, 52 * according to byte significance from low address to high. 53 */ 54 #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ 55 #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ 56 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ 57 58 #ifdef vax 59 #define BYTE_ORDER LITTLE_ENDIAN 60 #else 61 #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */ 62 #endif 63 #endif BYTE_ORDER 64 65 /* This much of a tpdu is the same for all types of tpdus (except 66 * DT tpdus in class 0; their exceptions are handled by the data 67 * structure below 68 */ 69 struct tpdu_fixed { 70 u_char _tpduf_li:8, /* length indicator */ 71 #if BYTE_ORDER == LITTLE_ENDIAN 72 _tpduf_cdt: 4, /* credit */ 73 _tpduf_type: 4; /* type of tpdu (DT, CR, etc.) */ 74 #endif 75 #if BYTE_ORDER == BIG_ENDIAN 76 _tpduf_type: 4, /* type of tpdu (DT, CR, etc.) */ 77 _tpduf_cdt: 4; /* credit */ 78 #endif 79 u_short _tpduf_dref; /* destination ref; not in DT in class 0 */ 80 }; 81 82 #define tpdu_li _tpduf._tpduf_li 83 #define tpdu_type _tpduf._tpduf_type 84 #define tpdu_cdt _tpduf._tpduf_cdt 85 #define tpdu_dref _tpduf._tpduf_dref 86 87 struct tp0du { 88 u_char _tp0_li, 89 _tp0_cdt_type, /* same as in tpdu_fixed */ 90 #if BYTE_ORDER == BIG_ENDIAN 91 _tp0_eot: 1, /* eot */ 92 _tp0_mbz: 7, /* must be zero */ 93 #endif 94 #if BYTE_ORDER == LITTLE_ENDIAN 95 _tp0_mbz: 7, /* must be zero */ 96 _tp0_eot: 1, /* eot */ 97 #endif 98 _tp0_notused: 8; /* data begins on this octet */ 99 }; 100 101 #define tp0du_eot _tp0_eot 102 #define tp0du_mbz _tp0_mbz 103 104 /* 105 * This is used when the extended format seqence numbers are 106 * being sent and received. 107 */ 108 /* 109 * the seqeot field is an int that overlays the seq 110 * and eot fields, this allows the htonl operation 111 * to be applied to the entire 32 bit quantity, and 112 * simplifies the structure definitions. 113 */ 114 union seq_type { 115 struct { 116 #if BYTE_ORDER == BIG_ENDIAN 117 unsigned int st_eot:1, /* end-of-tsdu */ 118 st_seq:31; /* 31 bit sequence number */ 119 #endif 120 #if BYTE_ORDER == LITTLE_ENDIAN 121 unsigned int st_seq:31, /* 31 bit sequence number */ 122 st_eot:1; /* end-of-tsdu */ 123 #endif 124 } st; 125 unsigned int s_seqeot; 126 #define s_eot st.st_eot 127 #define s_seq st.st_seq 128 }; 129 130 /* Then most tpdu types have a portion that is always present but 131 * differs among the tpdu types : 132 */ 133 union tpdu_fixed_rest { 134 135 struct { 136 u_short _tpdufr_sref, /* source reference */ 137 #if BYTE_ORDER == BIG_ENDIAN 138 _tpdufr_class: 4, /* class [ ISO 8073 13.3.3.e ] */ 139 _tpdufr_opt: 4, /* options [ ISO 8073 13.3.3.e ] */ 140 #endif 141 #if BYTE_ORDER == LITTLE_ENDIAN 142 _tpdufr_opt: 4, /* options [ ISO 8073 13.3.3.e ] */ 143 _tpdufr_class: 4, /* class [ ISO 8073 13.3.3.e ] */ 144 #endif 145 _tpdufr_xx: 8; /* unused */ 146 } CRCC; 147 148 #define tpdu_CRli _tpduf._tpduf_li 149 #define tpdu_CRtype _tpduf._tpduf_type 150 #define tpdu_CRcdt _tpduf._tpduf_cdt 151 #define tpdu_CRdref_0 _tpduf._tpduf_dref 152 #define tpdu_CRsref _tpdufr.CRCC._tpdufr_sref 153 #define tpdu_sref _tpdufr.CRCC._tpdufr_sref 154 #define tpdu_CRclass _tpdufr.CRCC._tpdufr_class 155 #define tpdu_CRoptions _tpdufr.CRCC._tpdufr_opt 156 157 #define tpdu_CCli _tpduf._tpduf_li 158 #define tpdu_CCtype _tpduf._tpduf_type 159 #define tpdu_CCcdt _tpduf._tpduf_cdt 160 #define tpdu_CCdref _tpduf._tpduf_dref 161 #define tpdu_CCsref _tpdufr.CRCC._tpdufr_sref 162 #define tpdu_CCclass _tpdufr.CRCC._tpdufr_class 163 #define tpdu_CCoptions _tpdufr.CRCC._tpdufr_opt 164 165 /* OPTIONS and ADDL OPTIONS bits */ 166 #define TPO_USE_EFC 0x1 167 #define TPO_XTD_FMT 0x2 168 #define TPAO_USE_TXPD 0x1 169 #define TPAO_NO_CSUM 0x2 170 #define TPAO_USE_RCC 0x4 171 #define TPAO_USE_NXPD 0x8 172 173 struct { 174 unsigned short _tpdufr_sref; /* source reference */ 175 unsigned char _tpdufr_reason; /* [ ISO 8073 13.5.3.d ] */ 176 } DR; 177 #define tpdu_DRli _tpduf._tpduf_li 178 #define tpdu_DRtype _tpduf._tpduf_type 179 #define tpdu_DRdref _tpduf._tpduf_dref 180 #define tpdu_DRsref _tpdufr.DR._tpdufr_sref 181 #define tpdu_DRreason _tpdufr.DR._tpdufr_reason 182 183 unsigned short _tpdufr_sref; /* source reference */ 184 185 #define tpdu_DCli _tpduf._tpduf_li 186 #define tpdu_DCtype _tpduf._tpduf_type 187 #define tpdu_DCdref _tpduf._tpduf_dref 188 #define tpdu_DCsref _tpdufr._tpdufr_sref 189 190 struct { 191 #if BYTE_ORDER == BIG_ENDIAN 192 unsigned char _tpdufr_eot:1, /* end-of-tsdu */ 193 _tpdufr_seq:7; /* 7 bit sequence number */ 194 #endif 195 #if BYTE_ORDER == LITTLE_ENDIAN 196 unsigned char _tpdufr_seq:7, /* 7 bit sequence number */ 197 _tpdufr_eot:1; /* end-of-tsdu */ 198 #endif 199 }SEQEOT; 200 struct { 201 #if BYTE_ORDER == BIG_ENDIAN 202 unsigned int _tpdufr_Xeot:1, /* end-of-tsdu */ 203 _tpdufr_Xseq:31; /* 31 bit sequence number */ 204 #endif 205 #if BYTE_ORDER == LITTLE_ENDIAN 206 unsigned int _tpdufr_Xseq:31, /* 31 bit sequence number */ 207 _tpdufr_Xeot:1; /* end-of-tsdu */ 208 #endif 209 }SEQEOT31; 210 unsigned int _tpdufr_Xseqeot; 211 #define tpdu_seqeotX _tpdufr._tpdufr_Xseqeot 212 213 #define tpdu_DTli _tpduf._tpduf_li 214 #define tpdu_DTtype _tpduf._tpduf_type 215 #define tpdu_DTdref _tpduf._tpduf_dref 216 #define tpdu_DTseq _tpdufr.SEQEOT._tpdufr_seq 217 #define tpdu_DTeot _tpdufr.SEQEOT._tpdufr_eot 218 #define tpdu_DTseqX _tpdufr.SEQEOT31._tpdufr_Xseq 219 #define tpdu_DTeotX _tpdufr.SEQEOT31._tpdufr_Xeot 220 221 #define tpdu_XPDli _tpduf._tpduf_li 222 #define tpdu_XPDtype _tpduf._tpduf_type 223 #define tpdu_XPDdref _tpduf._tpduf_dref 224 #define tpdu_XPDseq _tpdufr.SEQEOT._tpdufr_seq 225 #define tpdu_XPDeot _tpdufr.SEQEOT._tpdufr_eot 226 #define tpdu_XPDseqX _tpdufr.SEQEOT31._tpdufr_Xseq 227 #define tpdu_XPDeotX _tpdufr.SEQEOT31._tpdufr_Xeot 228 229 struct { 230 #if BYTE_ORDER == BIG_ENDIAN 231 unsigned _tpdufr_yrseq0:1, /* always zero */ 232 _tpdufr_yrseq:31; /* [ ISO 8073 13.9.3.d ] */ 233 #endif 234 #if BYTE_ORDER == LITTLE_ENDIAN 235 unsigned _tpdufr_yrseq:31, /* [ ISO 8073 13.9.3.d ] */ 236 _tpdufr_yrseq0:1; /* always zero */ 237 #endif 238 unsigned short _tpdufr_cdt; /* [ ISO 8073 13.9.3.b ] */ 239 } AK31; 240 241 #define tpdu_AKli _tpduf._tpduf_li 242 #define tpdu_AKtype _tpduf._tpduf_type 243 #define tpdu_AKdref _tpduf._tpduf_dref 244 #define tpdu_AKseq _tpdufr.SEQEOT._tpdufr_seq 245 #define tpdu_AKseqX _tpdufr.AK31._tpdufr_yrseq 246 /* location of cdt depends on size of seq. numbers */ 247 #define tpdu_AKcdt _tpduf._tpduf_cdt 248 #define tpdu_AKcdtX _tpdufr.AK31._tpdufr_cdt 249 250 #define tpdu_XAKli _tpduf._tpduf_li 251 #define tpdu_XAKtype _tpduf._tpduf_type 252 #define tpdu_XAKdref _tpduf._tpduf_dref 253 #define tpdu_XAKseq _tpdufr.SEQEOT._tpdufr_seq 254 #define tpdu_XAKseqX _tpdufr.SEQEOT31._tpdufr_Xseq 255 256 unsigned char _tpdu_ERreason; /* [ ISO 8073 13.12.3.c ] */ 257 258 #define tpdu_ERli _tpduf._tpduf_li 259 #define tpdu_ERtype _tpduf._tpduf_type 260 #define tpdu_ERdref _tpduf._tpduf_dref 261 #define tpdu_ERreason _tpdufr._tpdu_ERreason 262 263 }; 264 265 struct tpdu { 266 struct tpdu_fixed _tpduf; 267 union tpdu_fixed_rest _tpdufr; 268 }; 269 270 #endif __TP_TPDU__ 271