sys/netproto/atm/uni/qsaal1_sigaa.c

   1 /*
   2  *
   3  * ===================================
   4  * HARP  |  Host ATM Research Platform
   5  * ===================================
   6  *
   7  *
   8  * This Host ATM Research Platform ("HARP") file (the "Software") is
   9  * made available by Network Computing Services, Inc. ("NetworkCS")
  10  * "AS IS".  NetworkCS does not provide maintenance, improvements or
  11  * support of any kind.
  12  *
  13  * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
  14  * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
  15  * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
  16  * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
  17  * In no event shall NetworkCS be responsible for any damages, including
  18  * but not limited to consequential damages, arising from or relating to
  19  * any use of the Software or related support.
  20  *
  21  * Copyright 1994-1998 Network Computing Services, Inc.
  22  *
  23  * Copies of this Software may be made, however, the above copyright
  24  * notice must be reproduced on all copies.
  25  *
  26  *      @(#) $FreeBSD: src/sys/netatm/uni/qsaal1_sigaa.c,v 1.4 2000/01/17 20:49:49 mks Exp $
  27  *      @(#) $DragonFly: src/sys/netproto/atm/uni/qsaal1_sigaa.c,v 1.6 2006/01/14 13:36:39 swildner Exp $
  28  */
  29
  30 /*
  31  * ATM Forum UNI Support
  32  * ---------------------
  33  *
  34  * ITU-T Q.SAAL1 - Process AA-signals (SAP_SSCOP)
  35  *
  36  */
  37
  38 #include <netproto/atm/kern_include.h>
  39
  40 #include "sscop.h"
  41 #include "sscop_misc.h"
  42 #include "sscop_var.h"
  43
  44 /*
  45  * Local functions
  46  */
  47 static void     sscop_estreq_ready (struct sscop *, int, int);
  48 static void     sscop_datreq_outconn (struct sscop *, int, int);
  49 static void     sscop_resreq_ready (struct sscop *, int, int);
  50 static void     sscop_resrsp_inresyn (struct sscop *, int, int);
  51 static void     sscop_resrsp_conresyn (struct sscop *, int, int);
  52
  53
  54 /*
  55  * Stack command state lookup tables
  56  */
  57 /* SSCOP_INIT */
  58 static void     (*sscop_init_tab[SOS_NUMSTATES])
  59                                 (struct sscop *, int, int) = {
  60                         sscop_init_inst,        /* SOS_INST */
  61                         NULL,                   /* SOS_IDLE */
  62                         NULL,                   /* SOS_OUTCONN */
  63                         NULL,                   /* SOS_INCONN */
  64                         NULL,                   /* SOS_OUTDISC */
  65                         NULL,                   /* SOS_OUTRESYN */
  66                         NULL,                   /* SOS_INRESYN */
  67                         NULL,                   /* SOS_CONRESYN */
  68                         NULL,                   /* invalid */
  69                         NULL,                   /* invalid */
  70                         NULL,                   /* SOS_READY */
  71                         NULL                    /* SOS_TERM */
  72 };
  73
  74 /* SSCOP_TERM */
  75 static void     (*sscop_term_tab[SOS_NUMSTATES])
  76                                 (struct sscop *, int, int) = {
  77                         sscop_term_all,         /* SOS_INST */
  78                         sscop_term_all,         /* SOS_IDLE */
  79                         sscop_term_all,         /* SOS_OUTCONN */
  80                         sscop_term_all,         /* SOS_INCONN */
  81                         sscop_term_all,         /* SOS_OUTDISC */
  82                         sscop_term_all,         /* SOS_OUTRESYN */
  83                         sscop_term_all,         /* SOS_INRESYN */
  84                         sscop_term_all,         /* SOS_CONRESYN */
  85                         NULL,                   /* invalid */
  86                         NULL,                   /* invalid */
  87                         sscop_term_all,         /* SOS_READY */
  88                         sscop_term_all          /* SOS_TERM */
  89 };
  90
  91 /* SSCOP_ESTABLISH_REQ */
  92 static void     (*sscop_estreq_tab[SOS_NUMSTATES])
  93                                 (struct sscop *, int, int) = {
  94                         NULL,                   /* SOS_INST */
  95                         sscop_estreq_idle,      /* SOS_IDLE */
  96                         NULL,                   /* SOS_OUTCONN */
  97                         NULL,                   /* SOS_INCONN */
  98                         sscop_estreq_ready,     /* SOS_OUTDISC */
  99                         sscop_estreq_ready,     /* SOS_OUTRESYN */
 100                         sscop_estreq_ready,     /* SOS_INRESYN */
 101                         sscop_estreq_ready,     /* SOS_CONRESYN */
 102                         NULL,                   /* invalid */
 103                         NULL,                   /* invalid */
 104                         sscop_estreq_ready,     /* SOS_READY */
 105                         sscop_aa_noop_1         /* SOS_TERM */
 106 };
 107
 108 /* SSCOP_ESTABLISH_RSP */
 109 static void     (*sscop_estrsp_tab[SOS_NUMSTATES])
 110                                 (struct sscop *, int, int) = {
 111                         NULL,                   /* SOS_INST */
 112                         NULL,                   /* SOS_IDLE */
 113                         NULL,                   /* SOS_OUTCONN */
 114                         sscop_estrsp_inconn,    /* SOS_INCONN */
 115                         NULL,                   /* SOS_OUTDISC */
 116                         NULL,                   /* SOS_OUTRESYN */
 117                         NULL,                   /* SOS_INRESYN */
 118                         NULL,                   /* SOS_CONRESYN */
 119                         NULL,                   /* invalid */
 120                         NULL,                   /* invalid */
 121                         sscop_aa_noop_1,        /* SOS_READY */
 122                         sscop_aa_noop_1         /* SOS_TERM */
 123 };
 124
 125 /* SSCOP_RELEASE_REQ */
 126 static void     (*sscop_relreq_tab[SOS_NUMSTATES])
 127                                 (struct sscop *, int, int) = {
 128                         NULL,                   /* SOS_INST */
 129                         NULL,                   /* SOS_IDLE */
 130                         sscop_relreq_outconn,   /* SOS_OUTCONN */
 131                         sscop_relreq_inconn,    /* SOS_INCONN */
 132                         NULL,                   /* SOS_OUTDISC */
 133                         sscop_relreq_outconn,   /* SOS_OUTRESYN */
 134                         sscop_relreq_ready,     /* SOS_INRESYN */
 135                         sscop_relreq_outconn,   /* SOS_CONRESYN */
 136                         NULL,                   /* invalid */
 137                         NULL,                   /* invalid */
 138                         sscop_relreq_ready,     /* SOS_READY */
 139                         sscop_aa_noop_1         /* SOS_TERM */
 140 };
 141
 142 /* SSCOP_DATA_REQ */
 143 static void     (*sscop_datreq_tab[SOS_NUMSTATES])
 144                                 (struct sscop *, int, int) = {
 145                         NULL,                   /* SOS_INST */
 146                         NULL,                   /* SOS_IDLE */
 147                         sscop_datreq_outconn,   /* SOS_OUTCONN */
 148                         NULL,                   /* SOS_INCONN */
 149                         NULL,                   /* SOS_OUTDISC */
 150                         NULL,                   /* SOS_OUTRESYN */
 151                         sscop_datreq_ready,     /* SOS_INRESYN */
 152                         NULL,                   /* SOS_CONRESYN */
 153                         NULL,                   /* invalid */
 154                         NULL,                   /* invalid */
 155                         sscop_datreq_ready,     /* SOS_READY */
 156                         sscop_aa_noop_1         /* SOS_TERM */
 157 };
 158
 159 /* SSCOP_RESYNC_REQ */
 160 static void     (*sscop_resreq_tab[SOS_NUMSTATES])
 161                                 (struct sscop *, int, int) = {
 162                         NULL,                   /* SOS_INST */
 163                         NULL,                   /* SOS_IDLE */
 164                         NULL,                   /* SOS_OUTCONN */
 165                         NULL,                   /* SOS_INCONN */
 166                         NULL,                   /* SOS_OUTDISC */
 167                         NULL,                   /* SOS_OUTRESYN */
 168                         NULL,                   /* SOS_INRESYN */
 169                         NULL,                   /* SOS_CONRESYN */
 170                         NULL,                   /* invalid */
 171                         NULL,                   /* invalid */
 172                         sscop_resreq_ready,     /* SOS_READY */
 173                         sscop_aa_noop_1         /* SOS_TERM */
 174 };
 175
 176 /* SSCOP_RESYNC_RSP */
 177 static void     (*sscop_resrsp_tab[SOS_NUMSTATES])
 178                                 (struct sscop *, int, int) = {
 179                         NULL,                   /* SOS_INST */
 180                         NULL,                   /* SOS_IDLE */
 181                         NULL,                   /* SOS_OUTCONN */
 182                         NULL,                   /* SOS_INCONN */
 183                         NULL,                   /* SOS_OUTDISC */
 184                         NULL,                   /* SOS_OUTRESYN */
 185                         sscop_resrsp_inresyn,   /* SOS_INRESYN */
 186                         sscop_resrsp_conresyn,  /* SOS_CONRESYN */
 187                         NULL,                   /* invalid */
 188                         NULL,                   /* invalid */
 189                         NULL,                   /* SOS_READY */
 190                         sscop_aa_noop_0         /* SOS_TERM */
 191 };
 192
 193 /* SSCOP_UNITDATA_REQ */
 194 static void     (*sscop_udtreq_tab[SOS_NUMSTATES])
 195                                 (struct sscop *, int, int) = {
 196                         NULL,                   /* SOS_INST */
 197                         sscop_udtreq_all,       /* SOS_IDLE */
 198                         sscop_udtreq_all,       /* SOS_OUTCONN */
 199                         sscop_udtreq_all,       /* SOS_INCONN */
 200                         sscop_udtreq_all,       /* SOS_OUTDISC */
 201                         sscop_udtreq_all,       /* SOS_OUTRESYN */
 202                         sscop_udtreq_all,       /* SOS_INRESYN */
 203                         sscop_udtreq_all,       /* SOS_CONRESYN */
 204                         NULL,                   /* invalid */
 205                         NULL,                   /* invalid */
 206                         sscop_udtreq_all,       /* SOS_READY */
 207                         sscop_aa_noop_1         /* SOS_TERM */
 208 };
 209
 210
 211 /*
 212  * Stack command lookup table
 213  */
 214 void    (*(*sscop_qsaal_aatab[SSCOP_CMD_SIZE]))
 215                                 (struct sscop *, int, int) = {
 216                 NULL,
 217                 sscop_init_tab,
 218                 sscop_term_tab,
 219                 NULL,
 220                 NULL,
 221                 NULL,
 222                 NULL,
 223                 NULL,
 224                 NULL,
 225                 NULL,
 226                 NULL,
 227                 NULL,
 228                 NULL,
 229                 NULL,
 230                 NULL,
 231                 NULL,
 232                 sscop_estreq_tab,
 233                 NULL,
 234                 sscop_estrsp_tab,
 235                 NULL,
 236                 sscop_relreq_tab,
 237                 NULL,
 238                 NULL,
 239                 sscop_datreq_tab,
 240                 NULL,
 241                 sscop_resreq_tab,
 242                 NULL,
 243                 sscop_resrsp_tab,
 244                 NULL,
 245                 NULL,
 246                 NULL,
 247                 sscop_udtreq_tab,
 248                 NULL,
 249                 NULL,
 250                 NULL,
 251                 NULL
 252 };
 253
 254
 255 /*
 256  * SSCOP_ESTABLISH_REQ / SOS_READY Command Processor
 257  *
 258  * Arguments:
 259  *      sop     pointer to sscop connection block
 260  *      arg1    pointer to buffer containing SSCOP-UU data
 261  *      arg2    buffer release parameter
 262  *
 263  * Returns:
 264  *      none
 265  *
 266  */
 267 static void
 268 sscop_estreq_ready(struct sscop *sop, int arg1, int arg2)
 269 {
 270
 271         /*
 272          * We don't support SSCOP-UU data
 273          */
 274         if (arg1 != SSCOP_UU_NULL)
 275                 KB_FREEALL((KBuffer *)arg1);
 276
 277         /*
 278          * We currently only support BR=YES
 279          */
 280         if (arg2 != SSCOP_BR_YES) {
 281                 sscop_abort(sop, "sscop: BR != YES\n");
 282                 return;
 283         }
 284
 285         /*
 286          * Stop poll timer
 287          */
 288         sop->so_timer[SSCOP_T_POLL] = 0;
 289         sop->so_flags &= ~SOF_KEEPALIVE;
 290
 291         /*
 292          * Stop lost poll/stat timer
 293          */
 294         sop->so_timer[SSCOP_T_NORESP] = 0;
 295
 296         /*
 297          * Initialize receiver window
 298          */
 299         SEQ_SET(sop->so_rcvmax, sop->so_parm.sp_rcvwin);
 300
 301         /*
 302          * Send first BGN PDU
 303          */
 304         sop->so_connctl = 1;
 305         sscop_send_bgn(sop, SSCOP_SOURCE_USER);
 306
 307         /*
 308          * Reset transmitter state
 309          */
 310         qsaal1_reset_xmit(sop);
 311
 312         /*
 313          * Set retransmit timer
 314          */
 315         sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
 316
 317         /*
 318          * Wait for BGAK
 319          */
 320         sop->so_state = SOS_OUTCONN;
 321
 322         return;
 323 }
 324
 325
 326 /*
 327  * SSCOP_DATA_REQ / SOS_OUTCONN Command Processor
 328  *
 329  * Arguments:
 330  *      sop     pointer to sscop connection block
 331  *      arg1    pointer to buffer containing assured user data
 332  *      arg2    unused
 333  *
 334  * Returns:
 335  *      none
 336  *
 337  */
 338 static void
 339 sscop_datreq_outconn(struct sscop *sop, int arg1, int arg2)
 340 {
 341         KBuffer         *m = (KBuffer *)arg1;
 342
 343         /*
 344          * We must have a buffer (even if it contains no data)
 345          */
 346         if (m == NULL) {
 347                 sscop_abort(sop, "sscop_datreq_outconn: no buffer\n");
 348                 return;
 349         }
 350
 351         /*
 352          * Only accept data here if in the middle of an SSCOP-initiated
 353          * session reestablishment
 354          */
 355         if ((sop->so_flags & SOF_REESTAB) == 0) {
 356                 KB_FREEALL(m);
 357                 sscop_abort(sop, "sscop_datreq_outconn: data not allowed\n");
 358                 return;
 359         }
 360
 361         /*
 362          * Place data at end of transmission queue
 363          */
 364         KB_QNEXT(m) = NULL;
 365         if (sop->so_xmit_hd == NULL)
 366                 sop->so_xmit_hd = m;
 367         else
 368                 KB_QNEXT(sop->so_xmit_tl) = m;
 369         sop->so_xmit_tl = m;
 370
 371         /*
 372          * Note that the transmit queues need to be serviced
 373          */
 374         sop->so_flags |= SOF_XMITSRVC;
 375
 376         return;
 377 }
 378
 379
 380 /*
 381  * SSCOP_RESYNC_REQ / SOS_READY Command Processor
 382  *
 383  * Arguments:
 384  *      sop     pointer to sscop connection block
 385  *      arg1    pointer to buffer containing SSCOP-UU data
 386  *      arg2    unused
 387  *
 388  * Returns:
 389  *      none
 390  *
 391  */
 392 static void
 393 sscop_resreq_ready(struct sscop *sop, int arg1, int arg2)
 394 {
 395
 396         /*
 397          * We don't support SSCOP-UU data
 398          */
 399         if (arg1 != SSCOP_UU_NULL)
 400                 KB_FREEALL((KBuffer *)arg1);
 401
 402         /*
 403          * Stop poll timer
 404          */
 405         sop->so_timer[SSCOP_T_POLL] = 0;
 406         sop->so_flags &= ~SOF_KEEPALIVE;
 407
 408         /*
 409          * Stop lost poll/stat timer
 410          */
 411         sop->so_timer[SSCOP_T_NORESP] = 0;
 412
 413         /*
 414          * Send first RS PDU
 415          */
 416         sop->so_connctl = 1;
 417         sscop_send_rs(sop);
 418
 419         /*
 420          * Reset transmitter state
 421          */
 422         qsaal1_reset_xmit(sop);
 423
 424         /*
 425          * Set retransmit timer
 426          */
 427         sop->so_timer[SSCOP_T_CC] = sop->so_parm.sp_timecc;
 428
 429         /*
 430          * Wait for RSAK
 431          */
 432         sop->so_state = SOS_OUTRESYN;
 433
 434         return;
 435 }
 436
 437
 438 /*
 439  * SSCOP_RESYNC_RSP / SOS_INRESYN Command Processor
 440  *
 441  * Arguments:
 442  *      sop     pointer to sscop connection block
 443  *      arg1    unused
 444  *      arg2    unused
 445  *
 446  * Returns:
 447  *      none
 448  *
 449  */
 450 static void
 451 sscop_resrsp_inresyn(struct sscop *sop, int arg1, int arg2)
 452 {
 453
 454         /*
 455          * Send RSAK PDU
 456          */
 457         sscop_send_rsak(sop);
 458
 459         /*
 460          * Back to data transfer state
 461          */
 462         sop->so_state = SOS_READY;
 463
 464         return;
 465 }
 466
 467
 468 /*
 469  * SSCOP_RESYNC_RSP / SOS_CONRESYN Command Processor
 470  *
 471  * Arguments:
 472  *      sop     pointer to sscop connection block
 473  *      arg1    unused
 474  *      arg2    unused
 475  *
 476  * Returns:
 477  *      none
 478  *
 479  */
 480 static void
 481 sscop_resrsp_conresyn(struct sscop *sop, int arg1, int arg2)
 482 {
 483
 484         /*
 485          * Send RSAK PDU
 486          */
 487         sscop_send_rsak(sop);
 488
 489         /*
 490          * Back to waiting for peer's RSAK
 491          */
 492         sop->so_state = SOS_OUTRESYN;
 493
 494         return;
 495 }
 496