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 * @(#)tp_tpdu.h 7.3 (Berkeley) 08/29/89 * 33 * 34 * This ghastly set of macros makes it possible to 35 * refer to tpdu structures without going mad. 36 */ 37 38 #ifndef __TP_TPDU__ 39 #define __TP_TPDU__ 40 41 #ifndef BYTE_ORDER 42 /* 43 * Definitions for byte order, 44 * according to byte significance from low address to high. 45 */ 46 #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */ 47 #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */ 48 #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */ 49 50 #ifdef vax 51 #define BYTE_ORDER LITTLE_ENDIAN 52 #else 53 #define BYTE_ORDER BIG_ENDIAN /* mc68000, tahoe, most others */ 54 #endif 55 #endif BYTE_ORDER 56 57 /* This much of a tpdu is the same for all types of tpdus (except 58 * DT tpdus in class 0; their exceptions are handled by the data 59 * structure below 60 */ 61 struct tpdu_fixed { 62 u_char _tpduf_li:8, /* length indicator */ 63 #if BYTE_ORDER == LITTLE_ENDIAN 64 _tpduf_cdt: 4, /* credit */ 65 _tpduf_type: 4; /* type of tpdu (DT, CR, etc.) */ 66 #endif 67 #if BYTE_ORDER == BIG_ENDIAN 68 _tpduf_type: 4, /* type of tpdu (DT, CR, etc.) */ 69 _tpduf_cdt: 4; /* credit */ 70 #endif 71 u_short _tpduf_dref; /* destination ref; not in DT in class 0 */ 72 }; 73 74 #define tpdu_li _tpduf._tpduf_li 75 #define tpdu_type _tpduf._tpduf_type 76 #define tpdu_cdt _tpduf._tpduf_cdt 77 #define tpdu_dref _tpduf._tpduf_dref 78 79 struct tp0du { 80 u_char _tp0_li, 81 _tp0_cdt_type, /* same as in tpdu_fixed */ 82 #if BYTE_ORDER == BIG_ENDIAN 83 _tp0_eot: 1, /* eot */ 84 _tp0_mbz: 7, /* must be zero */ 85 #endif 86 #if BYTE_ORDER == LITTLE_ENDIAN 87 _tp0_mbz: 7, /* must be zero */ 88 _tp0_eot: 1, /* eot */ 89 #endif 90 _tp0_notused: 8; /* data begins on this octet */ 91 }; 92 93 #define tp0du_eot _tp0_eot 94 #define tp0du_mbz _tp0_mbz 95 96 /* 97 * This is used when the extended format seqence numbers are 98 * being sent and received. 99 */ 100 /* 101 * the seqeot field is an int that overlays the seq 102 * and eot fields, this allows the htonl operation 103 * to be applied to the entire 32 bit quantity, and 104 * simplifies the structure definitions. 105 */ 106 union seq_type { 107 struct { 108 #if BYTE_ORDER == BIG_ENDIAN 109 unsigned int st_eot:1, /* end-of-tsdu */ 110 st_seq:31; /* 31 bit sequence number */ 111 #endif 112 #if BYTE_ORDER == LITTLE_ENDIAN 113 unsigned int st_seq:31, /* 31 bit sequence number */ 114 st_eot:1; /* end-of-tsdu */ 115 #endif 116 } st; 117 unsigned int s_seqeot; 118 #define s_eot st.st_eot 119 #define s_seq st.st_seq 120 }; 121 122 /* Then most tpdu types have a portion that is always present but 123 * differs among the tpdu types : 124 */ 125 union tpdu_fixed_rest { 126 127 struct { 128 u_short _tpdufr_sref, /* source reference */ 129 #if BYTE_ORDER == BIG_ENDIAN 130 _tpdufr_class: 4, /* class [ ISO 8073 13.3.3.e ] */ 131 _tpdufr_opt: 4, /* options [ ISO 8073 13.3.3.e ] */ 132 #endif 133 #if BYTE_ORDER == LITTLE_ENDIAN 134 _tpdufr_opt: 4, /* options [ ISO 8073 13.3.3.e ] */ 135 _tpdufr_class: 4, /* class [ ISO 8073 13.3.3.e ] */ 136 #endif 137 _tpdufr_xx: 8; /* unused */ 138 } CRCC; 139 140 #define tpdu_CRli _tpduf._tpduf_li 141 #define tpdu_CRtype _tpduf._tpduf_type 142 #define tpdu_CRcdt _tpduf._tpduf_cdt 143 #define tpdu_CRdref_0 _tpduf._tpduf_dref 144 #define tpdu_CRsref _tpdufr.CRCC._tpdufr_sref 145 #define tpdu_sref _tpdufr.CRCC._tpdufr_sref 146 #define tpdu_CRclass _tpdufr.CRCC._tpdufr_class 147 #define tpdu_CRoptions _tpdufr.CRCC._tpdufr_opt 148 149 #define tpdu_CCli _tpduf._tpduf_li 150 #define tpdu_CCtype _tpduf._tpduf_type 151 #define tpdu_CCcdt _tpduf._tpduf_cdt 152 #define tpdu_CCdref _tpduf._tpduf_dref 153 #define tpdu_CCsref _tpdufr.CRCC._tpdufr_sref 154 #define tpdu_CCclass _tpdufr.CRCC._tpdufr_class 155 #define tpdu_CCoptions _tpdufr.CRCC._tpdufr_opt 156 157 /* OPTIONS and ADDL OPTIONS bits */ 158 #define TPO_USE_EFC 0x1 159 #define TPO_XTD_FMT 0x2 160 #define TPAO_USE_TXPD 0x1 161 #define TPAO_NO_CSUM 0x2 162 #define TPAO_USE_RCC 0x4 163 #define TPAO_USE_NXPD 0x8 164 165 struct { 166 unsigned short _tpdufr_sref; /* source reference */ 167 unsigned char _tpdufr_reason; /* [ ISO 8073 13.5.3.d ] */ 168 } DR; 169 #define tpdu_DRli _tpduf._tpduf_li 170 #define tpdu_DRtype _tpduf._tpduf_type 171 #define tpdu_DRdref _tpduf._tpduf_dref 172 #define tpdu_DRsref _tpdufr.DR._tpdufr_sref 173 #define tpdu_DRreason _tpdufr.DR._tpdufr_reason 174 175 unsigned short _tpdufr_sref; /* source reference */ 176 177 #define tpdu_DCli _tpduf._tpduf_li 178 #define tpdu_DCtype _tpduf._tpduf_type 179 #define tpdu_DCdref _tpduf._tpduf_dref 180 #define tpdu_DCsref _tpdufr._tpdufr_sref 181 182 struct { 183 #if BYTE_ORDER == BIG_ENDIAN 184 unsigned char _tpdufr_eot:1, /* end-of-tsdu */ 185 _tpdufr_seq:7; /* 7 bit sequence number */ 186 #endif 187 #if BYTE_ORDER == LITTLE_ENDIAN 188 unsigned char _tpdufr_seq:7, /* 7 bit sequence number */ 189 _tpdufr_eot:1; /* end-of-tsdu */ 190 #endif 191 }SEQEOT; 192 struct { 193 #if BYTE_ORDER == BIG_ENDIAN 194 unsigned int _tpdufr_Xeot:1, /* end-of-tsdu */ 195 _tpdufr_Xseq:31; /* 31 bit sequence number */ 196 #endif 197 #if BYTE_ORDER == LITTLE_ENDIAN 198 unsigned int _tpdufr_Xseq:31, /* 31 bit sequence number */ 199 _tpdufr_Xeot:1; /* end-of-tsdu */ 200 #endif 201 }SEQEOT31; 202 unsigned int _tpdufr_Xseqeot; 203 #define tpdu_seqeotX _tpdufr._tpdufr_Xseqeot 204 205 #define tpdu_DTli _tpduf._tpduf_li 206 #define tpdu_DTtype _tpduf._tpduf_type 207 #define tpdu_DTdref _tpduf._tpduf_dref 208 #define tpdu_DTseq _tpdufr.SEQEOT._tpdufr_seq 209 #define tpdu_DTeot _tpdufr.SEQEOT._tpdufr_eot 210 #define tpdu_DTseqX _tpdufr.SEQEOT31._tpdufr_Xseq 211 #define tpdu_DTeotX _tpdufr.SEQEOT31._tpdufr_Xeot 212 213 #define tpdu_XPDli _tpduf._tpduf_li 214 #define tpdu_XPDtype _tpduf._tpduf_type 215 #define tpdu_XPDdref _tpduf._tpduf_dref 216 #define tpdu_XPDseq _tpdufr.SEQEOT._tpdufr_seq 217 #define tpdu_XPDeot _tpdufr.SEQEOT._tpdufr_eot 218 #define tpdu_XPDseqX _tpdufr.SEQEOT31._tpdufr_Xseq 219 #define tpdu_XPDeotX _tpdufr.SEQEOT31._tpdufr_Xeot 220 221 struct { 222 #if BYTE_ORDER == BIG_ENDIAN 223 unsigned _tpdufr_yrseq0:1, /* always zero */ 224 _tpdufr_yrseq:31; /* [ ISO 8073 13.9.3.d ] */ 225 #endif 226 #if BYTE_ORDER == LITTLE_ENDIAN 227 unsigned _tpdufr_yrseq:31, /* [ ISO 8073 13.9.3.d ] */ 228 _tpdufr_yrseq0:1; /* always zero */ 229 #endif 230 unsigned short _tpdufr_cdt; /* [ ISO 8073 13.9.3.b ] */ 231 } AK31; 232 233 #define tpdu_AKli _tpduf._tpduf_li 234 #define tpdu_AKtype _tpduf._tpduf_type 235 #define tpdu_AKdref _tpduf._tpduf_dref 236 #define tpdu_AKseq _tpdufr.SEQEOT._tpdufr_seq 237 #define tpdu_AKseqX _tpdufr.AK31._tpdufr_yrseq 238 /* location of cdt depends on size of seq. numbers */ 239 #define tpdu_AKcdt _tpduf._tpduf_cdt 240 #define tpdu_AKcdtX _tpdufr.AK31._tpdufr_cdt 241 242 #define tpdu_XAKli _tpduf._tpduf_li 243 #define tpdu_XAKtype _tpduf._tpduf_type 244 #define tpdu_XAKdref _tpduf._tpduf_dref 245 #define tpdu_XAKseq _tpdufr.SEQEOT._tpdufr_seq 246 #define tpdu_XAKseqX _tpdufr.SEQEOT31._tpdufr_Xseq 247 248 unsigned char _tpdu_ERreason; /* [ ISO 8073 13.12.3.c ] */ 249 250 #define tpdu_ERli _tpduf._tpduf_li 251 #define tpdu_ERtype _tpduf._tpduf_type 252 #define tpdu_ERdref _tpduf._tpduf_dref 253 #define tpdu_ERreason _tpdufr._tpdu_ERreason 254 255 }; 256 257 struct tpdu { 258 struct tpdu_fixed _tpduf; 259 union tpdu_fixed_rest _tpdufr; 260 }; 261 262 #endif __TP_TPDU__ 263