1 /*********************************************************** 2 Copyright IBM Corporation 1987 3 4 All Rights Reserved 5 6 Permission to use, copy, modify, and distribute this software and its 7 documentation for any purpose and without fee is hereby granted, 8 provided that the above copyright notice appear in all copies and that 9 both that copyright notice and this permission notice appear in 10 supporting documentation, and that the name of IBM not be 11 used in advertising or publicity pertaining to distribution of the 12 software without specific, written prior permission. 13 14 IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 15 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 16 IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 17 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 18 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 19 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 20 SOFTWARE. 21 22 ******************************************************************/ 23 24 /* 25 * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison 26 */ 27 /* 28 * ARGO TP 29 * 30 * $Header: tp_tpdu.h,v 4.4 88/07/26 16:45:40 nhall Exp $ 31 * $Source: /usr/argo/sys/netiso/RCS/tp_tpdu.h,v $ 32 * 33 * This ghastly set of macros makes it possible to 34 * refer to tpdu structures without going mad. 35 */ 36 37 #ifndef __TP_TPDU__ 38 #define __TP_TPDU__ 39 40 #ifndef BYTE_ORDER 41 /* 42 * Definitions for byte order, 43 * according to byte significance from low address to high. 44 */ 45 #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ 46 #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ 47 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ 48 49 #ifdef vax 50 #define BYTE_ORDER LITTLE_ENDIAN 51 #else 52 #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */ 53 #endif 54 #endif BYTE_ORDER 55 56 /* This much of a tpdu is the same for all types of tpdus (except 57 * DT tpdus in class 0; their exceptions are handled by the data 58 * structure below 59 */ 60 struct tpdu_fixed { 61 unsigned _tpduf_li:8, /* length indicator */ 62 #if BYTE_ORDER == LITTLE_ENDIAN 63 _tpduf_cdt: 4, /* credit */ 64 _tpduf_type: 4, /* type of tpdu (DT, CR, etc.) */ 65 #endif 66 #if BYTE_ORDER == BIG_ENDIAN 67 _tpduf_type: 4, /* type of tpdu (DT, CR, etc.) */ 68 _tpduf_cdt: 4, /* credit */ 69 #endif 70 _tpduf_dref: 16; /* destination ref; not in DT in class 0 */ 71 }; 72 73 #define tpdu_li _tpduf._tpduf_li 74 #define tpdu_type _tpduf._tpduf_type 75 #define tpdu_cdt _tpduf._tpduf_cdt 76 #define tpdu_dref _tpduf._tpduf_dref 77 78 struct tp0du { 79 unsigned _tp0same:16, /* same as in tpdu_fixed */ 80 #if BYTE_ORDER == BIG_ENDIAN 81 _tp0_eot: 1, /* eot */ 82 _tp0_mbz: 7, /* must be zero */ 83 #endif 84 #if BYTE_ORDER == LITTLE_ENDIAN 85 _tp0_mbz: 7, /* must be zero */ 86 _tp0_eot: 1, /* eot */ 87 #endif 88 _tp0_notused: 8; /* data begins on this octet */ 89 }; 90 91 #define tp0du_eot _tp0_eot 92 #define tp0du_mbz _tp0_mbz 93 94 /* 95 * This is used when the extended format seqence numbers are 96 * being sent and received. 97 */ 98 /* 99 * the seqeot field is an int that overlays the seq 100 * and eot fields, this allows the htonl operation 101 * to be applied to the entire 32 bit quantity, and 102 * simplifies the structure definitions. 103 */ 104 union seq_type { 105 struct { 106 #if BYTE_ORDER == BIG_ENDIAN 107 unsigned int st_eot:1, /* end-of-tsdu */ 108 st_seq:31; /* 31 bit sequence number */ 109 #endif 110 #if BYTE_ORDER == LITTLE_ENDIAN 111 unsigned int st_seq:31, /* 31 bit sequence number */ 112 st_eot:1; /* end-of-tsdu */ 113 #endif 114 } st; 115 unsigned int s_seqeot; 116 #define s_eot st.st_eot 117 #define s_seq st.st_seq 118 }; 119 120 /* Then most tpdu types have a portion that is always present but 121 * differs among the tpdu types : 122 */ 123 union tpdu_fixed_rest { 124 125 struct { 126 unsigned _tpdufr_sref:16, /* source reference */ 127 #if BYTE_ORDER == BIG_ENDIAN 128 _tpdufr_class: 4, /* class [ ISO 8073 13.3.3.e ] */ 129 _tpdufr_opt: 4, /* options [ ISO 8073 13.3.3.e ] */ 130 #endif 131 #if BYTE_ORDER == LITTLE_ENDIAN 132 _tpdufr_opt: 4, /* options [ ISO 8073 13.3.3.e ] */ 133 _tpdufr_class: 4, /* class [ ISO 8073 13.3.3.e ] */ 134 #endif 135 _tpdufr_xx: 8; /* unused */ 136 } CRCC; 137 138 #define tpdu_CRli _tpduf._tpduf_li 139 #define tpdu_CRtype _tpduf._tpduf_type 140 #define tpdu_CRcdt _tpduf._tpduf_cdt 141 #define tpdu_CRdref_0 _tpduf._tpduf_dref 142 #define tpdu_CRsref _tpdufr.CRCC._tpdufr_sref 143 #define tpdu_sref _tpdufr.CRCC._tpdufr_sref 144 #define tpdu_CRclass _tpdufr.CRCC._tpdufr_class 145 #define tpdu_CRoptions _tpdufr.CRCC._tpdufr_opt 146 147 #define tpdu_CCli _tpduf._tpduf_li 148 #define tpdu_CCtype _tpduf._tpduf_type 149 #define tpdu_CCcdt _tpduf._tpduf_cdt 150 #define tpdu_CCdref _tpduf._tpduf_dref 151 #define tpdu_CCsref _tpdufr.CRCC._tpdufr_sref 152 #define tpdu_CCclass _tpdufr.CRCC._tpdufr_class 153 #define tpdu_CCoptions _tpdufr.CRCC._tpdufr_opt 154 155 /* OPTIONS and ADDL OPTIONS bits */ 156 #define TPO_USE_EFC 0x1 157 #define TPO_XTD_FMT 0x2 158 #define TPAO_USE_TXPD 0x1 159 #define TPAO_NO_CSUM 0x2 160 #define TPAO_USE_RCC 0x4 161 #define TPAO_USE_NXPD 0x8 162 163 struct { 164 unsigned short _tpdufr_sref; /* source reference */ 165 unsigned char _tpdufr_reason; /* [ ISO 8073 13.5.3.d ] */ 166 } DR; 167 #define tpdu_DRli _tpduf._tpduf_li 168 #define tpdu_DRtype _tpduf._tpduf_type 169 #define tpdu_DRdref _tpduf._tpduf_dref 170 #define tpdu_DRsref _tpdufr.DR._tpdufr_sref 171 #define tpdu_DRreason _tpdufr.DR._tpdufr_reason 172 173 unsigned short _tpdufr_sref; /* source reference */ 174 175 #define tpdu_DCli _tpduf._tpduf_li 176 #define tpdu_DCtype _tpduf._tpduf_type 177 #define tpdu_DCdref _tpduf._tpduf_dref 178 #define tpdu_DCsref _tpdufr._tpdufr_sref 179 180 struct { 181 #if BYTE_ORDER == BIG_ENDIAN 182 unsigned char _tpdufr_eot:1, /* end-of-tsdu */ 183 _tpdufr_seq:7; /* 7 bit sequence number */ 184 #endif 185 #if BYTE_ORDER == LITTLE_ENDIAN 186 unsigned char _tpdufr_seq:7, /* 7 bit sequence number */ 187 _tpdufr_eot:1; /* end-of-tsdu */ 188 #endif 189 }SEQEOT; 190 struct { 191 #if BYTE_ORDER == BIG_ENDIAN 192 unsigned int _tpdufr_Xeot:1, /* end-of-tsdu */ 193 _tpdufr_Xseq:31; /* 31 bit sequence number */ 194 #endif 195 #if BYTE_ORDER == LITTLE_ENDIAN 196 unsigned int _tpdufr_Xseq:31, /* 31 bit sequence number */ 197 _tpdufr_Xeot:1; /* end-of-tsdu */ 198 #endif 199 }SEQEOT31; 200 unsigned int _tpdufr_Xseqeot; 201 #define tpdu_seqeotX _tpdufr._tpdufr_Xseqeot 202 203 #define tpdu_DTli _tpduf._tpduf_li 204 #define tpdu_DTtype _tpduf._tpduf_type 205 #define tpdu_DTdref _tpduf._tpduf_dref 206 #define tpdu_DTseq _tpdufr.SEQEOT._tpdufr_seq 207 #define tpdu_DTeot _tpdufr.SEQEOT._tpdufr_eot 208 #define tpdu_DTseqX _tpdufr.SEQEOT31._tpdufr_Xseq 209 #define tpdu_DTeotX _tpdufr.SEQEOT31._tpdufr_Xeot 210 211 #define tpdu_XPDli _tpduf._tpduf_li 212 #define tpdu_XPDtype _tpduf._tpduf_type 213 #define tpdu_XPDdref _tpduf._tpduf_dref 214 #define tpdu_XPDseq _tpdufr.SEQEOT._tpdufr_seq 215 #define tpdu_XPDeot _tpdufr.SEQEOT._tpdufr_eot 216 #define tpdu_XPDseqX _tpdufr.SEQEOT31._tpdufr_Xseq 217 #define tpdu_XPDeotX _tpdufr.SEQEOT31._tpdufr_Xeot 218 219 struct { 220 #if BYTE_ORDER == BIG_ENDIAN 221 unsigned _tpdufr_yrseq0:1, /* always zero */ 222 _tpdufr_yrseq:31; /* [ ISO 8073 13.9.3.d ] */ 223 #endif 224 #if BYTE_ORDER == LITTLE_ENDIAN 225 unsigned _tpdufr_yrseq:31, /* [ ISO 8073 13.9.3.d ] */ 226 _tpdufr_yrseq0:1; /* always zero */ 227 #endif 228 unsigned short _tpdufr_cdt; /* [ ISO 8073 13.9.3.b ] */ 229 } AK31; 230 231 #define tpdu_AKli _tpduf._tpduf_li 232 #define tpdu_AKtype _tpduf._tpduf_type 233 #define tpdu_AKdref _tpduf._tpduf_dref 234 #define tpdu_AKseq _tpdufr.SEQEOT._tpdufr_seq 235 #define tpdu_AKseqX _tpdufr.AK31._tpdufr_yrseq 236 /* location of cdt depends on size of seq. numbers */ 237 #define tpdu_AKcdt _tpduf._tpduf_cdt 238 #define tpdu_AKcdtX _tpdufr.AK31._tpdufr_cdt 239 240 #define tpdu_XAKli _tpduf._tpduf_li 241 #define tpdu_XAKtype _tpduf._tpduf_type 242 #define tpdu_XAKdref _tpduf._tpduf_dref 243 #define tpdu_XAKseq _tpdufr.SEQEOT._tpdufr_seq 244 #define tpdu_XAKseqX _tpdufr.SEQEOT31._tpdufr_Xseq 245 246 unsigned char _tpdu_ERreason; /* [ ISO 8073 13.12.3.c ] */ 247 248 #define tpdu_ERli _tpduf._tpduf_li 249 #define tpdu_ERtype _tpduf._tpduf_type 250 #define tpdu_ERdref _tpduf._tpduf_dref 251 #define tpdu_ERreason _tpdufr._tpdu_ERreason 252 253 }; 254 255 struct tpdu { 256 struct tpdu_fixed _tpduf; 257 union tpdu_fixed_rest _tpdufr; 258 }; 259 260 #endif __TP_TPDU__ 261