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   1 /* @(#) $Header: /tcpdump/master/tcpdump/sctpHeader.h,v 1.4 2002-06-11 17:08:59 itojun Exp $ (LBL) */
   2
   3 /* SCTP reference Implementation Copyright (C) 1999 Cisco And Motorola
   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  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 4. Neither the name of Cisco nor of Motorola may be used
  17  *    to endorse or promote products derived from this software without
  18  *    specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * This file is part of the SCTP reference Implementation
  33  *
  34  *
  35  * Please send any bug reports or fixes you make to one of the following email
  36  * addresses:
  37  *
  38  * rstewar1@email.mot.com
  39  * kmorneau@cisco.com
  40  * qxie1@email.mot.com
  41  *
  42  * Any bugs reported given to us we will try to fix... any fixes shared will
  43  * be incorperated into the next SCTP release.
  44  */
  45
  46
  47 #ifndef __sctpHeader_h__
  48 #define __sctpHeader_h__
  49
  50 #include <sctpConstants.h>
  51
  52 #ifdef  __cplusplus
  53 extern "C" {
  54 #endif
  55
  56 /* the sctp common header */
  57
  58 #ifdef TRU64
  59  #define _64BITS 1
  60 #endif
  61
  62 struct sctpHeader{
  63   u_short source;
  64   u_short destination;
  65   u_int verificationTag;
  66   u_int adler32;
  67 };
  68
  69 /* various descriptor parsers */
  70
  71 struct sctpChunkDesc{
  72   u_char chunkID;
  73   u_char chunkFlg;
  74   u_short chunkLength;
  75 };
  76
  77 struct sctpParamDesc{
  78   u_short paramType;
  79   u_short paramLength;
  80 };
  81
  82
  83 struct sctpRelChunkDesc{
  84   struct sctpChunkDesc chk;
  85   u_int serialNumber;
  86 };
  87
  88 struct sctpVendorSpecificParam {
  89   struct sctpParamDesc p;  /* type must be 0xfffe */
  90   u_int vendorId;          /* vendor ID from RFC 1700 */
  91   u_short vendorSpecificType;
  92   u_short vendorSpecificLen;
  93 };
  94
  95
  96 /* Structures for the control parts */
  97
  98
  99
 100 /* Sctp association init request/ack */
 101
 102 /* this is used for init ack, too */
 103 struct sctpInitiation{
 104   u_int initTag;                /* tag of mine */
 105   u_int rcvWindowCredit;        /* rwnd */
 106   u_short NumPreopenStreams;    /* OS */
 107   u_short MaxInboundStreams;     /* MIS */
 108   u_int initialTSN;
 109   /* optional param's follow in sctpParamDesc form */
 110 };
 111
 112 struct sctpV4IpAddress{
 113   struct sctpParamDesc p;       /* type is set to SCTP_IPV4_PARAM_TYPE, len=10 */
 114   u_int  ipAddress;
 115 };
 116
 117
 118 struct sctpV6IpAddress{
 119   struct sctpParamDesc p;       /* type is set to SCTP_IPV6_PARAM_TYPE, len=22 */
 120   u_char  ipAddress[16];
 121 };
 122
 123 struct sctpDNSName{
 124   struct sctpParamDesc param;
 125   u_char name[1];
 126 };
 127
 128
 129 struct sctpCookiePreserve{
 130   struct sctpParamDesc p;       /* type is set to SCTP_COOKIE_PRESERVE, len=8 */
 131   u_int extraTime;
 132 };
 133
 134
 135 struct sctpTimeStamp{
 136   u_int ts_sec;
 137   u_int ts_usec;
 138 };
 139
 140 /* wire structure of my cookie */
 141 struct cookieMessage{
 142   u_int TieTag_curTag;                  /* copied from assoc if present */
 143   u_int TieTag_hisTag;          /* copied from assoc if present */
 144   int cookieLife;                       /* life I will award this cookie */
 145   struct sctpTimeStamp timeEnteringState; /* the time I built cookie */
 146   struct sctpInitiation initAckISent;   /* the INIT-ACK that I sent to my peer */
 147   u_int addressWhereISent[4];           /* I make this 4 ints so I get 128bits for future */
 148   int addrtype;                         /* address type */
 149   u_short locScope;                     /* V6 local scope flag */
 150   u_short siteScope;                    /* V6 site scope flag */
 151   /* at the end is tacked on the INIT chunk sent in
 152    * its entirety and of course our
 153    * signature.
 154    */
 155 };
 156
 157
 158 /* this guy is for use when
 159  * I have a initiate message gloming the
 160  * things together.
 161
 162  */
 163 struct sctpUnifiedInit{
 164   struct sctpChunkDesc uh;
 165   struct sctpInitiation initm;
 166 };
 167
 168 struct sctpSendableInit{
 169   struct sctpHeader mh;
 170   struct sctpUnifiedInit msg;
 171 };
 172
 173
 174 /* Selective Acknowledgement
 175  * has the following structure with
 176  * a optional ammount of trailing int's
 177  * on the last part (based on the numberOfDesc
 178  * field).
 179  */
 180
 181 struct sctpSelectiveAck{
 182   u_int highestConseqTSN;
 183   u_int updatedRwnd;
 184   u_short numberOfdesc;
 185   u_short numDupTsns;
 186 };
 187
 188 struct sctpSelectiveFrag{
 189   u_short fragmentStart;
 190   u_short fragmentEnd;
 191 };
 192
 193
 194 struct sctpUnifiedSack{
 195   struct sctpChunkDesc uh;
 196   struct sctpSelectiveAck sack;
 197 };
 198
 199 /* for both RTT request/response the
 200  * following is sent
 201  */
 202
 203 struct sctpHBrequest {
 204   u_int time_value_1;
 205   u_int time_value_2;
 206 };
 207
 208 /* here is what I read and respond with to. */
 209 struct sctpHBunified{
 210   struct sctpChunkDesc hdr;
 211   struct sctpParamDesc hb;
 212 };
 213
 214
 215 /* here is what I send */
 216 struct sctpHBsender{
 217   struct sctpChunkDesc hdr;
 218   struct sctpParamDesc hb;
 219   struct sctpHBrequest rtt;
 220   char addrFmt[SCTP_ADDRMAX];
 221   unsigned short userreq;
 222 };
 223
 224
 225
 226 /* for the abort and shutdown ACK
 227  * we must carry the init tag in the common header. Just the
 228  * common header is all that is needed with a chunk descriptor.
 229  */
 230 struct sctpUnifiedAbort{
 231   struct sctpChunkDesc uh;
 232 };
 233
 234 struct sctpUnifiedAbortLight{
 235   struct sctpHeader mh;
 236   struct sctpChunkDesc uh;
 237 };
 238
 239 struct sctpUnifiedAbortHeavy{
 240   struct sctpHeader mh;
 241   struct sctpChunkDesc uh;
 242   unsigned short causeCode;
 243   unsigned short causeLen;
 244 };
 245
 246 /* For the graceful shutdown we must carry
 247  * the tag (in common header)  and the highest consequitive acking value
 248  */
 249 struct sctpShutdown {
 250   u_int TSN_Seen;
 251 };
 252
 253 struct sctpUnifiedShutdown{
 254   struct sctpChunkDesc uh;
 255   struct sctpShutdown shut;
 256 };
 257
 258 /* in the unified message we add the trailing
 259  * stream id since it is the only message
 260  * that is defined as a operation error.
 261  */
 262 struct sctpOpErrorCause{
 263   u_short cause;
 264   u_short causeLen;
 265 };
 266
 267 struct sctpUnifiedOpError{
 268   struct sctpChunkDesc uh;
 269   struct sctpOpErrorCause c;
 270 };
 271
 272 struct sctpUnifiedStreamError{
 273   struct sctpHeader mh;
 274   struct sctpChunkDesc uh;
 275   struct sctpOpErrorCause c;
 276   u_short strmNum;
 277   u_short reserved;
 278 };
 279
 280 struct staleCookieMsg{
 281   struct sctpHeader mh;
 282   struct sctpChunkDesc uh;
 283   struct sctpOpErrorCause c;
 284   u_int moretime;
 285 };
 286
 287 /* the following is used in all sends
 288  * where nothing is needed except the
 289  * chunk/type i.e. shutdownAck Abort */
 290
 291 struct sctpUnifiedSingleMsg{
 292   struct sctpHeader mh;
 293   struct sctpChunkDesc uh;
 294 };
 295
 296 struct sctpDataPart{
 297   u_int TSN;
 298   u_short streamId;
 299   u_short sequence;
 300   u_int payloadtype;
 301 };
 302
 303 struct sctpUnifiedDatagram{
 304   struct sctpChunkDesc uh;
 305   struct sctpDataPart dp;
 306 };
 307
 308 struct sctpECN_echo{
 309   struct sctpChunkDesc uh;
 310   u_int Lowest_TSN;
 311 };
 312
 313
 314 struct sctpCWR{
 315   struct sctpChunkDesc uh;
 316   u_int TSN_reduced_at;
 317 };
 318
 319 #ifdef  __cplusplus
 320 }
 321 #endif
 322
 323 #endif