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   1 /* $Id: l3dss1.c,v 2.32.2.3 2004/01/13 14:31:25 keil Exp $
   2  *
   3  * EURO/DSS1 D-channel protocol
   4  *
   5  * German 1TR6 D-channel protocol
   6  *
   7  * Author       Karsten Keil
   8  *              based on the teles driver from Jan den Ouden
   9  * Copyright    by Karsten Keil      <keil@isdn4linux.de>
  10  *
  11  * This software may be used and distributed according to the terms
  12  * of the GNU General Public License, incorporated herein by reference.
  13  *
  14  * For changes and modifications please read
  15  * Documentation/isdn/HiSax.cert
  16  *
  17  * Thanks to    Jan den Ouden
  18  *              Fritz Elfert
  19  *
  20  */
  21
  22 #include "hisax.h"
  23 #include "isdnl3.h"
  24 #include "l3dss1.h"
  25 #include <linux/ctype.h>
  26
  27 extern char *HiSax_getrev(const char *revision);
  28 static const char *dss1_revision = "$Revision: 2.32.2.3 $";
  29
  30 #define EXT_BEARER_CAPS 1
  31
  32 #define MsgHead(ptr, cref, mty) \
  33         *ptr++ = 0x8; \
  34         if (cref == -1) { \
  35                 *ptr++ = 0x0; \
  36         } else { \
  37                 *ptr++ = 0x1; \
  38                 *ptr++ = cref^0x80; \
  39         } \
  40         *ptr++ = mty
  41
  42
  43 /**********************************************/
  44 /* get a new invoke id for remote operations. */
  45 /* Only a return value != 0 is valid          */
  46 /**********************************************/
  47 static unsigned char new_invoke_id(struct PStack *p)
  48 {
  49         unsigned char retval;
  50         int i;
  51
  52         i = 32; /* maximum search depth */
  53
  54         retval = p->prot.dss1.last_invoke_id + 1; /* try new id */
  55         while ((i) && (p->prot.dss1.invoke_used[retval >> 3] == 0xFF)) {
  56                 p->prot.dss1.last_invoke_id = (retval & 0xF8) + 8;
  57                 i--;
  58         }
  59         if (i) {
  60                 while (p->prot.dss1.invoke_used[retval >> 3] & (1 << (retval & 7)))
  61                 retval++;
  62         } else
  63                 retval = 0;
  64         p->prot.dss1.last_invoke_id = retval;
  65         p->prot.dss1.invoke_used[retval >> 3] |= (1 << (retval & 7));
  66         return(retval);
  67 } /* new_invoke_id */
  68
  69 /*************************/
  70 /* free a used invoke id */
  71 /*************************/
  72 static void free_invoke_id(struct PStack *p, unsigned char id)
  73 {
  74
  75   if (!id) return; /* 0 = invalid value */
  76
  77   p->prot.dss1.invoke_used[id >> 3] &= ~(1 << (id & 7));
  78 } /* free_invoke_id */
  79
  80
  81 /**********************************************************/
  82 /* create a new l3 process and fill in dss1 specific data */
  83 /**********************************************************/
  84 static struct l3_process
  85 *dss1_new_l3_process(struct PStack *st, int cr)
  86 {  struct l3_process *proc;
  87
  88    if (!(proc = new_l3_process(st, cr)))
  89      return(NULL);
  90
  91    proc->prot.dss1.invoke_id = 0;
  92    proc->prot.dss1.remote_operation = 0;
  93    proc->prot.dss1.uus1_data[0] = '\0';
  94
  95    return(proc);
  96 } /* dss1_new_l3_process */
  97
  98 /************************************************/
  99 /* free a l3 process and all dss1 specific data */
 100 /************************************************/
 101 static void
 102 dss1_release_l3_process(struct l3_process *p)
 103 {
 104    free_invoke_id(p->st,p->prot.dss1.invoke_id);
 105    release_l3_process(p);
 106 } /* dss1_release_l3_process */
 107
 108 /********************************************************/
 109 /* search a process with invoke id id and dummy callref */
 110 /********************************************************/
 111 static struct l3_process *
 112 l3dss1_search_dummy_proc(struct PStack *st, int id)
 113 { struct l3_process *pc = st->l3.proc; /* start of processes */
 114
 115   if (!id) return(NULL);
 116
 117   while (pc)
 118    { if ((pc->callref == -1) && (pc->prot.dss1.invoke_id == id))
 119        return(pc);
 120      pc = pc->next;
 121    }
 122   return(NULL);
 123 } /* l3dss1_search_dummy_proc */
 124
 125 /*******************************************************************/
 126 /* called when a facility message with a dummy callref is received */
 127 /* and a return result is delivered. id specifies the invoke id.   */
 128 /*******************************************************************/
 129 static void
 130 l3dss1_dummy_return_result(struct PStack *st, int id, u_char *p, u_char nlen)
 131 { isdn_ctrl ic;
 132   struct IsdnCardState *cs;
 133   struct l3_process *pc = NULL;
 134
 135   if ((pc = l3dss1_search_dummy_proc(st, id)))
 136    { L3DelTimer(&pc->timer); /* remove timer */
 137
 138      cs = pc->st->l1.hardware;
 139      ic.driver = cs->myid;
 140      ic.command = ISDN_STAT_PROT;
 141      ic.arg = DSS1_STAT_INVOKE_RES;
 142      ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
 143      ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
 144      ic.parm.dss1_io.proc = pc->prot.dss1.proc;
 145      ic.parm.dss1_io.timeout= 0;
 146      ic.parm.dss1_io.datalen = nlen;
 147      ic.parm.dss1_io.data = p;
 148      free_invoke_id(pc->st, pc->prot.dss1.invoke_id);
 149      pc->prot.dss1.invoke_id = 0; /* reset id */
 150
 151      cs->iif.statcallb(&ic);
 152      dss1_release_l3_process(pc);
 153    }
 154   else
 155    l3_debug(st, "dummy return result id=0x%x result len=%d",id,nlen);
 156 } /* l3dss1_dummy_return_result */
 157
 158 /*******************************************************************/
 159 /* called when a facility message with a dummy callref is received */
 160 /* and a return error is delivered. id specifies the invoke id.    */
 161 /*******************************************************************/
 162 static void
 163 l3dss1_dummy_error_return(struct PStack *st, int id, ulong error)
 164 { isdn_ctrl ic;
 165   struct IsdnCardState *cs;
 166   struct l3_process *pc = NULL;
 167
 168   if ((pc = l3dss1_search_dummy_proc(st, id)))
 169    { L3DelTimer(&pc->timer); /* remove timer */
 170
 171      cs = pc->st->l1.hardware;
 172      ic.driver = cs->myid;
 173      ic.command = ISDN_STAT_PROT;
 174      ic.arg = DSS1_STAT_INVOKE_ERR;
 175      ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
 176      ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
 177      ic.parm.dss1_io.proc = pc->prot.dss1.proc;
 178      ic.parm.dss1_io.timeout= error;
 179      ic.parm.dss1_io.datalen = 0;
 180      ic.parm.dss1_io.data = NULL;
 181      free_invoke_id(pc->st, pc->prot.dss1.invoke_id);
 182      pc->prot.dss1.invoke_id = 0; /* reset id */
 183
 184      cs->iif.statcallb(&ic);
 185      dss1_release_l3_process(pc);
 186    }
 187   else
 188    l3_debug(st, "dummy return error id=0x%x error=0x%lx",id,error);
 189 } /* l3dss1_error_return */
 190
 191 /*******************************************************************/
 192 /* called when a facility message with a dummy callref is received */
 193 /* and a invoke is delivered. id specifies the invoke id.          */
 194 /*******************************************************************/
 195 static void
 196 l3dss1_dummy_invoke(struct PStack *st, int cr, int id,
 197                     int ident, u_char *p, u_char nlen)
 198 { isdn_ctrl ic;
 199   struct IsdnCardState *cs;
 200
 201   l3_debug(st, "dummy invoke %s id=0x%x ident=0x%x datalen=%d",
 202                (cr == -1) ? "local" : "broadcast",id,ident,nlen);
 203   if (cr >= -1) return; /* ignore local data */
 204
 205   cs = st->l1.hardware;
 206   ic.driver = cs->myid;
 207   ic.command = ISDN_STAT_PROT;
 208   ic.arg = DSS1_STAT_INVOKE_BRD;
 209   ic.parm.dss1_io.hl_id = id;
 210   ic.parm.dss1_io.ll_id = 0;
 211   ic.parm.dss1_io.proc = ident;
 212   ic.parm.dss1_io.timeout= 0;
 213   ic.parm.dss1_io.datalen = nlen;
 214   ic.parm.dss1_io.data = p;
 215
 216   cs->iif.statcallb(&ic);
 217 } /* l3dss1_dummy_invoke */
 218
 219 static void
 220 l3dss1_parse_facility(struct PStack *st, struct l3_process *pc,
 221                       int cr, u_char * p)
 222 {
 223         int qd_len = 0;
 224         unsigned char nlen = 0, ilen, cp_tag;
 225         int ident, id;
 226         ulong err_ret;
 227
 228         if (pc)
 229                 st = pc->st; /* valid Stack */
 230         else
 231                 if ((!st) || (cr >= 0)) return; /* neither pc nor st specified */
 232
 233         p++;
 234         qd_len = *p++;
 235         if (qd_len == 0) {
 236                 l3_debug(st, "qd_len == 0");
 237                 return;
 238         }
 239         if ((*p & 0x1F) != 0x11) {      /* Service discriminator, supplementary service */
 240                 l3_debug(st, "supplementary service != 0x11");
 241                 return;
 242         }
 243         while (qd_len > 0 && !(*p & 0x80)) {    /* extension ? */
 244                 p++;
 245                 qd_len--;
 246         }
 247         if (qd_len < 2) {
 248                 l3_debug(st, "qd_len < 2");
 249                 return;
 250         }
 251         p++;
 252         qd_len--;
 253         if ((*p & 0xE0) != 0xA0) {      /* class and form */
 254                 l3_debug(st, "class and form != 0xA0");
 255                 return;
 256         }
 257
 258         cp_tag = *p & 0x1F; /* remember tag value */
 259
 260         p++;
 261         qd_len--;
 262         if (qd_len < 1)
 263           { l3_debug(st, "qd_len < 1");
 264             return;
 265           }
 266         if (*p & 0x80)
 267           { /* length format indefinite or limited */
 268             nlen = *p++ & 0x7F; /* number of len bytes or indefinite */
 269             if ((qd_len-- < ((!nlen) ? 3 : (1 + nlen))) ||
 270                 (nlen > 1))
 271              { l3_debug(st, "length format error or not implemented");
 272                return;
 273              }
 274             if (nlen == 1)
 275              { nlen = *p++; /* complete length */
 276                qd_len--;
 277              }
 278             else
 279              { qd_len -= 2; /* trailing null bytes */
 280                if ((*(p+qd_len)) || (*(p+qd_len+1)))
 281                 { l3_debug(st,"length format indefinite error");
 282                   return;
 283                 }
 284                nlen = qd_len;
 285              }
 286           }
 287         else
 288           { nlen = *p++;
 289             qd_len--;
 290           }
 291         if (qd_len < nlen)
 292           { l3_debug(st, "qd_len < nlen");
 293             return;
 294           }
 295         qd_len -= nlen;
 296
 297         if (nlen < 2)
 298           { l3_debug(st, "nlen < 2");
 299             return;
 300           }
 301         if (*p != 0x02)
 302           {  /* invoke identifier tag */
 303              l3_debug(st, "invoke identifier tag !=0x02");
 304              return;
 305           }
 306         p++;
 307         nlen--;
 308         if (*p & 0x80)
 309           { /* length format */
 310             l3_debug(st, "invoke id length format 2");
 311             return;
 312           }
 313         ilen = *p++;
 314         nlen--;
 315         if (ilen > nlen || ilen == 0)
 316           { l3_debug(st, "ilen > nlen || ilen == 0");
 317             return;
 318           }
 319         nlen -= ilen;
 320         id = 0;
 321         while (ilen > 0)
 322           { id = (id << 8) | (*p++ & 0xFF);     /* invoke identifier */
 323             ilen--;
 324           }
 325
 326         switch (cp_tag) {       /* component tag */
 327                 case 1: /* invoke */
 328                                 if (nlen < 2) {
 329                                         l3_debug(st, "nlen < 2 22");
 330                                         return;
 331                                 }
 332                                 if (*p != 0x02) {       /* operation value */
 333                                         l3_debug(st, "operation value !=0x02");
 334                                         return;
 335                                 }
 336                                 p++;
 337                                 nlen--;
 338                                 ilen = *p++;
 339                                 nlen--;
 340                                 if (ilen > nlen || ilen == 0) {
 341                                         l3_debug(st, "ilen > nlen || ilen == 0 22");
 342                                         return;
 343                                 }
 344                                 nlen -= ilen;
 345                                 ident = 0;
 346                                 while (ilen > 0) {
 347                                         ident = (ident << 8) | (*p++ & 0xFF);
 348                                         ilen--;
 349                                 }
 350
 351                                 if (!pc)
 352                                  { l3dss1_dummy_invoke(st, cr, id, ident, p, nlen);
 353                                    return;
 354                                  }
 355 #ifdef HISAX_DE_AOC
 356                         {
 357
 358 #define FOO1(s,a,b) \
 359             while(nlen > 1) {           \
 360                     int ilen = p[1];    \
 361                     if(nlen < ilen+2) { \
 362                             l3_debug(st, "FOO1  nlen < ilen+2"); \
 363                             return;             \
 364                     }                   \
 365                     nlen -= ilen+2;             \
 366                     if((*p & 0xFF) == (a)) {    \
 367                             int nlen = ilen;    \
 368                             p += 2;             \
 369                             b;          \
 370                     } else {            \
 371                             p += ilen+2;        \
 372                     }                   \
 373             }
 374
 375                                 switch (ident) {
 376                                         case 0x22:      /* during */
 377                                                 FOO1("1A", 0x30, FOO1("1C", 0xA1, FOO1("1D", 0x30, FOO1("1E", 0x02, ( {
 378                                                                ident = 0;
 379                                                         nlen = (nlen)?nlen:0; /* Make gcc happy */
 380                                                         while (ilen > 0) {
 381                                                                                                                      ident = (ident << 8) | *p++;
 382                                                                   ilen--;
 383                                                                         }
 384                                                                                                                      if (ident > pc->para.chargeinfo) {
 385                                                                                                                      pc->para.chargeinfo = ident;
 386                                                                                                                      st->l3.l3l4(st, CC_CHARGE | INDICATION, pc);
 387                                                                         }
 388                                                                                                                      if (st->l3.debug & L3_DEB_CHARGE) {
 389                                                                                                                      if (*(p + 2) == 0) {
 390                                                                                                                      l3_debug(st, "charging info during %d", pc->para.chargeinfo);
 391                                                                         }
 392                                                                    else {
 393                                                                                                                      l3_debug(st, "charging info final %d", pc->para.chargeinfo);
 394                                                                         }
 395                                                                         }
 396                                                                         }
 397                                                                     )))))
 398                                                         break;
 399                                         case 0x24:      /* final */
 400                                                 FOO1("2A", 0x30, FOO1("2B", 0x30, FOO1("2C", 0xA1, FOO1("2D", 0x30, FOO1("2E", 0x02, ( {
 401                                                                ident = 0;
 402                                                         nlen = (nlen)?nlen:0; /* Make gcc happy */
 403                                                         while (ilen > 0) {
 404                                                                                                                                       ident = (ident << 8) | *p++;
 405                                                                   ilen--;
 406                                                                         }
 407                                                                                                                                       if (ident > pc->para.chargeinfo) {
 408                                                                                                                                       pc->para.chargeinfo = ident;
 409                                                                                                                                       st->l3.l3l4(st, CC_CHARGE | INDICATION, pc);
 410                                                                         }
 411                                                                                                                                       if (st->l3.debug & L3_DEB_CHARGE) {
 412                                                                                                                                       l3_debug(st, "charging info final %d", pc->para.chargeinfo);
 413                                                                         }
 414                                                                         }
 415                                                                    ))))))
 416                                                         break;
 417                                         default:
 418                                                        l3_debug(st, "invoke break invalid ident %02x",ident);
 419                                                 break;
 420                                 }
 421 #undef FOO1
 422
 423                         }
 424 #else  /* not HISAX_DE_AOC */
 425                         l3_debug(st, "invoke break");
 426 #endif /* not HISAX_DE_AOC */
 427                         break;
 428                 case 2: /* return result */
 429                          /* if no process available handle separately */
 430                         if (!pc)
 431                          { if (cr == -1)
 432                              l3dss1_dummy_return_result(st, id, p, nlen);
 433                            return;
 434                          }
 435                         if ((pc->prot.dss1.invoke_id) && (pc->prot.dss1.invoke_id == id))
 436                           { /* Diversion successful */
 437                             free_invoke_id(st,pc->prot.dss1.invoke_id);
 438                             pc->prot.dss1.remote_result = 0; /* success */
 439                             pc->prot.dss1.invoke_id = 0;
 440                             pc->redir_result = pc->prot.dss1.remote_result;
 441                             st->l3.l3l4(st, CC_REDIR | INDICATION, pc);                                  } /* Diversion successful */
 442                         else
 443                           l3_debug(st,"return error unknown identifier");
 444                         break;
 445                 case 3: /* return error */
 446                             err_ret = 0;
 447                             if (nlen < 2)
 448                               { l3_debug(st, "return error nlen < 2");
 449                                 return;
 450                               }
 451                             if (*p != 0x02)
 452                               { /* result tag */
 453                                 l3_debug(st, "invoke error tag !=0x02");
 454                                 return;
 455                               }
 456                             p++;
 457                             nlen--;
 458                             if (*p > 4)
 459                               { /* length format */
 460                                 l3_debug(st, "invoke return errlen > 4 ");
 461                                 return;
 462                               }
 463                             ilen = *p++;
 464                             nlen--;
 465                             if (ilen > nlen || ilen == 0)
 466                               { l3_debug(st, "error return ilen > nlen || ilen == 0");
 467                                 return;
 468                                }
 469                             nlen -= ilen;
 470                             while (ilen > 0)
 471                              { err_ret = (err_ret << 8) | (*p++ & 0xFF);        /* error value */
 472                                ilen--;
 473                              }
 474                          /* if no process available handle separately */
 475                         if (!pc)
 476                          { if (cr == -1)
 477                              l3dss1_dummy_error_return(st, id, err_ret);
 478                            return;
 479                          }
 480                         if ((pc->prot.dss1.invoke_id) && (pc->prot.dss1.invoke_id == id))
 481                           { /* Deflection error */
 482                             free_invoke_id(st,pc->prot.dss1.invoke_id);
 483                             pc->prot.dss1.remote_result = err_ret; /* result */
 484                             pc->prot.dss1.invoke_id = 0;
 485                             pc->redir_result = pc->prot.dss1.remote_result;
 486                             st->l3.l3l4(st, CC_REDIR | INDICATION, pc);
 487                           } /* Deflection error */
 488                         else
 489                           l3_debug(st,"return result unknown identifier");
 490                         break;
 491                 default:
 492                         l3_debug(st, "facility default break tag=0x%02x",cp_tag);
 493                         break;
 494         }
 495 }
 496
 497 static void
 498 l3dss1_message(struct l3_process *pc, u_char mt)
 499 {
 500         struct sk_buff *skb;
 501         u_char *p;
 502
 503         if (!(skb = l3_alloc_skb(4)))
 504                 return;
 505         p = skb_put(skb, 4);
 506         MsgHead(p, pc->callref, mt);
 507         l3_msg(pc->st, DL_DATA | REQUEST, skb);
 508 }
 509
 510 static void
 511 l3dss1_message_cause(struct l3_process *pc, u_char mt, u_char cause)
 512 {
 513         struct sk_buff *skb;
 514         u_char tmp[16];
 515         u_char *p = tmp;
 516         int l;
 517
 518         MsgHead(p, pc->callref, mt);
 519         *p++ = IE_CAUSE;
 520         *p++ = 0x2;
 521         *p++ = 0x80;
 522         *p++ = cause | 0x80;
 523
 524         l = p - tmp;
 525         if (!(skb = l3_alloc_skb(l)))
 526                 return;
 527         memcpy(skb_put(skb, l), tmp, l);
 528         l3_msg(pc->st, DL_DATA | REQUEST, skb);
 529 }
 530
 531 static void
 532 l3dss1_status_send(struct l3_process *pc, u_char pr, void *arg)
 533 {
 534         u_char tmp[16];
 535         u_char *p = tmp;
 536         int l;
 537         struct sk_buff *skb;
 538
 539         MsgHead(p, pc->callref, MT_STATUS);
 540
 541         *p++ = IE_CAUSE;
 542         *p++ = 0x2;
 543         *p++ = 0x80;
 544         *p++ = pc->para.cause | 0x80;
 545
 546         *p++ = IE_CALL_STATE;
 547         *p++ = 0x1;
 548         *p++ = pc->state & 0x3f;
 549
 550         l = p - tmp;
 551         if (!(skb = l3_alloc_skb(l)))
 552                 return;
 553         memcpy(skb_put(skb, l), tmp, l);
 554         l3_msg(pc->st, DL_DATA | REQUEST, skb);
 555 }
 556
 557 static void
 558 l3dss1_msg_without_setup(struct l3_process *pc, u_char pr, void *arg)
 559 {
 560         /* This routine is called if here was no SETUP made (checks in dss1up and in
 561          * l3dss1_setup) and a RELEASE_COMPLETE have to be sent with an error code
 562          * MT_STATUS_ENQUIRE in the NULL state is handled too
 563          */
 564         u_char tmp[16];
 565         u_char *p = tmp;
 566         int l;
 567         struct sk_buff *skb;
 568
 569         switch (pc->para.cause) {
 570                 case 81:        /* invalid callreference */
 571                 case 88:        /* incomp destination */
 572                 case 96:        /* mandory IE missing */
 573                 case 100:       /* invalid IE contents */
 574                 case 101:       /* incompatible Callstate */
 575                         MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
 576                         *p++ = IE_CAUSE;
 577                         *p++ = 0x2;
 578                         *p++ = 0x80;
 579                         *p++ = pc->para.cause | 0x80;
 580                         break;
 581                 default:
 582                         printk(KERN_ERR "HiSax l3dss1_msg_without_setup wrong cause %d\n",
 583                                 pc->para.cause);
 584                         return;
 585         }
 586         l = p - tmp;
 587         if (!(skb = l3_alloc_skb(l)))
 588                 return;
 589         memcpy(skb_put(skb, l), tmp, l);
 590         l3_msg(pc->st, DL_DATA | REQUEST, skb);
 591         dss1_release_l3_process(pc);
 592 }
 593
 594 static int ie_ALERTING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
 595                 IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_HLC,
 596                 IE_USER_USER, -1};
 597 static int ie_CALL_PROCEEDING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
 598                 IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_HLC, -1};
 599 static int ie_CONNECT[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
 600                 IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_DATE, IE_SIGNAL,
 601                 IE_CONNECT_PN, IE_CONNECT_SUB, IE_LLC, IE_HLC, IE_USER_USER, -1};
 602 static int ie_CONNECT_ACKNOWLEDGE[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_SIGNAL, -1};
 603 static int ie_DISCONNECT[] = {IE_CAUSE | IE_MANDATORY, IE_FACILITY,
 604                 IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1};
 605 static int ie_INFORMATION[] = {IE_COMPLETE, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL,
 606                 IE_CALLED_PN, -1};
 607 static int ie_NOTIFY[] = {IE_BEARER, IE_NOTIFY | IE_MANDATORY, IE_DISPLAY, -1};
 608 static int ie_PROGRESS[] = {IE_BEARER, IE_CAUSE, IE_FACILITY, IE_PROGRESS |
 609                 IE_MANDATORY, IE_DISPLAY, IE_HLC, IE_USER_USER, -1};
 610 static int ie_RELEASE[] = {IE_CAUSE | IE_MANDATORY_1, IE_FACILITY, IE_DISPLAY,
 611                 IE_SIGNAL, IE_USER_USER, -1};
 612 /* a RELEASE_COMPLETE with errors don't require special actions
 613 static int ie_RELEASE_COMPLETE[] = {IE_CAUSE | IE_MANDATORY_1, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1};
 614 */
 615 static int ie_RESUME_ACKNOWLEDGE[] = {IE_CHANNEL_ID| IE_MANDATORY, IE_FACILITY,
 616                 IE_DISPLAY, -1};
 617 static int ie_RESUME_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
 618 static int ie_SETUP[] = {IE_COMPLETE, IE_BEARER  | IE_MANDATORY,
 619                 IE_CHANNEL_ID| IE_MANDATORY, IE_FACILITY, IE_PROGRESS,
 620                 IE_NET_FAC, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL, IE_CALLING_PN,
 621                 IE_CALLING_SUB, IE_CALLED_PN, IE_CALLED_SUB, IE_REDIR_NR,
 622                 IE_LLC, IE_HLC, IE_USER_USER, -1};
 623 static int ie_SETUP_ACKNOWLEDGE[] = {IE_CHANNEL_ID | IE_MANDATORY, IE_FACILITY,
 624                 IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, -1};
 625 static int ie_STATUS[] = {IE_CAUSE | IE_MANDATORY, IE_CALL_STATE |
 626                 IE_MANDATORY, IE_DISPLAY, -1};
 627 static int ie_STATUS_ENQUIRY[] = {IE_DISPLAY, -1};
 628 static int ie_SUSPEND_ACKNOWLEDGE[] = {IE_DISPLAY, IE_FACILITY, -1};
 629 static int ie_SUSPEND_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
 630 /* not used
 631  * static int ie_CONGESTION_CONTROL[] = {IE_CONGESTION | IE_MANDATORY,
 632  *              IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
 633  * static int ie_USER_INFORMATION[] = {IE_MORE_DATA, IE_USER_USER | IE_MANDATORY, -1};
 634  * static int ie_RESTART[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_RESTART_IND |
 635  *              IE_MANDATORY, -1};
 636  */
 637 static int ie_FACILITY[] = {IE_FACILITY | IE_MANDATORY, IE_DISPLAY, -1};
 638 static int comp_required[] = {1,2,3,5,6,7,9,10,11,14,15,-1};
 639 static int l3_valid_states[] = {0,1,2,3,4,6,7,8,9,10,11,12,15,17,19,25,-1};
 640
 641 struct ie_len {
 642         int ie;
 643         int len;
 644 };
 645
 646 static
 647 struct ie_len max_ie_len[] = {
 648         {IE_SEGMENT, 4},
 649         {IE_BEARER, 12},
 650         {IE_CAUSE, 32},
 651         {IE_CALL_ID, 10},
 652         {IE_CALL_STATE, 3},
 653         {IE_CHANNEL_ID, 34},
 654         {IE_FACILITY, 255},
 655         {IE_PROGRESS, 4},
 656         {IE_NET_FAC, 255},
 657         {IE_NOTIFY, 3},
 658         {IE_DISPLAY, 82},
 659         {IE_DATE, 8},
 660         {IE_KEYPAD, 34},
 661         {IE_SIGNAL, 3},
 662         {IE_INFORATE, 6},
 663         {IE_E2E_TDELAY, 11},
 664         {IE_TDELAY_SEL, 5},
 665         {IE_PACK_BINPARA, 3},
 666         {IE_PACK_WINSIZE, 4},
 667         {IE_PACK_SIZE, 4},
 668         {IE_CUG, 7},
 669         {IE_REV_CHARGE, 3},
 670         {IE_CALLING_PN, 24},
 671         {IE_CALLING_SUB, 23},
 672         {IE_CALLED_PN, 24},
 673         {IE_CALLED_SUB, 23},
 674         {IE_REDIR_NR, 255},
 675         {IE_TRANS_SEL, 255},
 676         {IE_RESTART_IND, 3},
 677         {IE_LLC, 18},
 678         {IE_HLC, 5},
 679         {IE_USER_USER, 131},
 680         {-1,0},
 681 };
 682
 683 static int
 684 getmax_ie_len(u_char ie) {
 685         int i = 0;
 686         while (max_ie_len[i].ie != -1) {
 687                 if (max_ie_len[i].ie == ie)
 688                         return(max_ie_len[i].len);
 689                 i++;
 690         }
 691         return(255);
 692 }
 693
 694 static int
 695 ie_in_set(struct l3_process *pc, u_char ie, int *checklist) {
 696         int ret = 1;
 697
 698         while (*checklist != -1) {
 699                 if ((*checklist & 0xff) == ie) {
 700                         if (ie & 0x80)
 701                                 return(-ret);
 702                         else
 703                                 return(ret);
 704                 }
 705                 ret++;
 706                 checklist++;
 707         }
 708         return(0);
 709 }
 710
 711 static int
 712 check_infoelements(struct l3_process *pc, struct sk_buff *skb, int *checklist)
 713 {
 714         int *cl = checklist;
 715         u_char mt;
 716         u_char *p, ie;
 717         int l, newpos, oldpos;
 718         int err_seq = 0, err_len = 0, err_compr = 0, err_ureg = 0;
 719         u_char codeset = 0;
 720         u_char old_codeset = 0;
 721         u_char codelock = 1;
 722
 723         p = skb->data;
 724         /* skip cr */
 725         p++;
 726         l = (*p++) & 0xf;
 727         p += l;
 728         mt = *p++;
 729         oldpos = 0;
 730         while ((p - skb->data) < skb->len) {
 731                 if ((*p & 0xf0) == 0x90) { /* shift codeset */
 732                         old_codeset = codeset;
 733                         codeset = *p & 7;
 734                         if (*p & 0x08)
 735                                 codelock = 0;
 736                         else
 737                                 codelock = 1;
 738                         if (pc->debug & L3_DEB_CHECK)
 739                                 l3_debug(pc->st, "check IE shift%scodeset %d->%d",
 740                                         codelock ? " locking ": " ", old_codeset, codeset);
 741                         p++;
 742                         continue;
 743                 }
 744                 if (!codeset) { /* only codeset 0 */
 745                         if ((newpos = ie_in_set(pc, *p, cl))) {
 746                                 if (newpos > 0) {
 747                                         if (newpos < oldpos)
 748                                                 err_seq++;
 749                                         else
 750                                                 oldpos = newpos;
 751                                 }
 752                         } else {
 753                                 if (ie_in_set(pc, *p, comp_required))
 754                                         err_compr++;
 755                                 else
 756                                         err_ureg++;
 757                         }
 758                 }
 759                 ie = *p++;
 760                 if (ie & 0x80) {
 761                         l = 1;
 762                 } else {
 763                         l = *p++;
 764                         p += l;
 765                         l += 2;
 766                 }
 767                 if (!codeset && (l > getmax_ie_len(ie)))
 768                         err_len++;
 769                 if (!codelock) {
 770                         if (pc->debug & L3_DEB_CHECK)
 771                                 l3_debug(pc->st, "check IE shift back codeset %d->%d",
 772                                         codeset, old_codeset);
 773                         codeset = old_codeset;
 774                         codelock = 1;
 775                 }
 776         }
 777         if (err_compr | err_ureg | err_len | err_seq) {
 778                 if (pc->debug & L3_DEB_CHECK)
 779                         l3_debug(pc->st, "check IE MT(%x) %d/%d/%d/%d",
 780                                 mt, err_compr, err_ureg, err_len, err_seq);
 781                 if (err_compr)
 782                         return(ERR_IE_COMPREHENSION);
 783                 if (err_ureg)
 784                         return(ERR_IE_UNRECOGNIZED);
 785                 if (err_len)
 786                         return(ERR_IE_LENGTH);
 787                 if (err_seq)
 788                         return(ERR_IE_SEQUENCE);
 789         }
 790         return(0);
 791 }
 792
 793 /* verify if a message type exists and contain no IE error */
 794 static int
 795 l3dss1_check_messagetype_validity(struct l3_process *pc, int mt, void *arg)
 796 {
 797         switch (mt) {
 798                 case MT_ALERTING:
 799                 case MT_CALL_PROCEEDING:
 800                 case MT_CONNECT:
 801                 case MT_CONNECT_ACKNOWLEDGE:
 802                 case MT_DISCONNECT:
 803                 case MT_INFORMATION:
 804                 case MT_FACILITY:
 805                 case MT_NOTIFY:
 806                 case MT_PROGRESS:
 807                 case MT_RELEASE:
 808                 case MT_RELEASE_COMPLETE:
 809                 case MT_SETUP:
 810                 case MT_SETUP_ACKNOWLEDGE:
 811                 case MT_RESUME_ACKNOWLEDGE:
 812                 case MT_RESUME_REJECT:
 813                 case MT_SUSPEND_ACKNOWLEDGE:
 814                 case MT_SUSPEND_REJECT:
 815                 case MT_USER_INFORMATION:
 816                 case MT_RESTART:
 817                 case MT_RESTART_ACKNOWLEDGE:
 818                 case MT_CONGESTION_CONTROL:
 819                 case MT_STATUS:
 820                 case MT_STATUS_ENQUIRY:
 821                         if (pc->debug & L3_DEB_CHECK)
 822                                 l3_debug(pc->st, "l3dss1_check_messagetype_validity mt(%x) OK", mt);
 823                         break;
 824                 case MT_RESUME: /* RESUME only in user->net */
 825                 case MT_SUSPEND: /* SUSPEND only in user->net */
 826                 default:
 827                         if (pc->debug & (L3_DEB_CHECK | L3_DEB_WARN))
 828                                 l3_debug(pc->st, "l3dss1_check_messagetype_validity mt(%x) fail", mt);
 829                         pc->para.cause = 97;
 830                         l3dss1_status_send(pc, 0, NULL);
 831                         return(1);
 832         }
 833         return(0);
 834 }
 835
 836 static void
 837 l3dss1_std_ie_err(struct l3_process *pc, int ret) {
 838
 839         if (pc->debug & L3_DEB_CHECK)
 840                 l3_debug(pc->st, "check_infoelements ret %d", ret);
 841         switch(ret) {
 842                 case 0:
 843                         break;
 844                 case ERR_IE_COMPREHENSION:
 845                         pc->para.cause = 96;
 846                         l3dss1_status_send(pc, 0, NULL);
 847                         break;
 848                 case ERR_IE_UNRECOGNIZED:
 849                         pc->para.cause = 99;
 850                         l3dss1_status_send(pc, 0, NULL);
 851                         break;
 852                 case ERR_IE_LENGTH:
 853                         pc->para.cause = 100;
 854                         l3dss1_status_send(pc, 0, NULL);
 855                         break;
 856                 case ERR_IE_SEQUENCE:
 857                 default:
 858                         break;
 859         }
 860 }
 861
 862 static int
 863 l3dss1_get_channel_id(struct l3_process *pc, struct sk_buff *skb) {
 864         u_char *p;
 865
 866         p = skb->data;
 867         if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) {
 868                 p++;
 869                 if (*p != 1) { /* len for BRI = 1 */
 870                         if (pc->debug & L3_DEB_WARN)
 871                                 l3_debug(pc->st, "wrong chid len %d", *p);
 872                         return (-2);
 873                 }
 874                 p++;
 875                 if (*p & 0x60) { /* only base rate interface */
 876                         if (pc->debug & L3_DEB_WARN)
 877                                 l3_debug(pc->st, "wrong chid %x", *p);
 878                         return (-3);
 879                 }
 880                 return(*p & 0x3);
 881         } else
 882                 return(-1);
 883 }
 884
 885 static int
 886 l3dss1_get_cause(struct l3_process *pc, struct sk_buff *skb) {
 887         u_char l, i=0;
 888         u_char *p;
 889
 890         p = skb->data;
 891         pc->para.cause = 31;
 892         pc->para.loc = 0;
 893         if ((p = findie(p, skb->len, IE_CAUSE, 0))) {
 894                 p++;
 895                 l = *p++;
 896                 if (l>30)
 897                         return(1);
 898                 if (l) {
 899                         pc->para.loc = *p++;
 900                         l--;
 901                 } else {
 902                         return(2);
 903                 }
 904                 if (l && !(pc->para.loc & 0x80)) {
 905                         l--;
 906                         p++; /* skip recommendation */
 907                 }
 908                 if (l) {
 909                         pc->para.cause = *p++;
 910                         l--;
 911                         if (!(pc->para.cause & 0x80))
 912                                 return(3);
 913                 } else
 914                         return(4);
 915                 while (l && (i<6)) {
 916                         pc->para.diag[i++] = *p++;
 917                         l--;
 918                 }
 919         } else
 920                 return(-1);
 921         return(0);
 922 }
 923
 924 static void
 925 l3dss1_msg_with_uus(struct l3_process *pc, u_char cmd)
 926 {
 927         struct sk_buff *skb;
 928         u_char tmp[16+40];
 929         u_char *p = tmp;
 930         int l;
 931
 932         MsgHead(p, pc->callref, cmd);
 933
 934         if (pc->prot.dss1.uus1_data[0])
 935          { *p++ = IE_USER_USER; /* UUS info element */
 936            *p++ = strlen(pc->prot.dss1.uus1_data) + 1;
 937            *p++ = 0x04; /* IA5 chars */
 938            strcpy(p,pc->prot.dss1.uus1_data);
 939            p += strlen(pc->prot.dss1.uus1_data);
 940            pc->prot.dss1.uus1_data[0] = '\0';
 941          }
 942
 943         l = p - tmp;
 944         if (!(skb = l3_alloc_skb(l)))
 945                 return;
 946         memcpy(skb_put(skb, l), tmp, l);
 947         l3_msg(pc->st, DL_DATA | REQUEST, skb);
 948 } /* l3dss1_msg_with_uus */
 949
 950 static void
 951 l3dss1_release_req(struct l3_process *pc, u_char pr, void *arg)
 952 {
 953         StopAllL3Timer(pc);
 954         newl3state(pc, 19);
 955         if (!pc->prot.dss1.uus1_data[0])
 956                 l3dss1_message(pc, MT_RELEASE);
 957         else
 958                 l3dss1_msg_with_uus(pc, MT_RELEASE);
 959         L3AddTimer(&pc->timer, T308, CC_T308_1);
 960 }
 961
 962 static void
 963 l3dss1_release_cmpl(struct l3_process *pc, u_char pr, void *arg)
 964 {
 965         struct sk_buff *skb = arg;
 966         int ret;
 967
 968         if ((ret = l3dss1_get_cause(pc, skb))>0) {
 969                 if (pc->debug & L3_DEB_WARN)
 970                         l3_debug(pc->st, "RELCMPL get_cause ret(%d)",ret);
 971         } else if (ret < 0)
 972                 pc->para.cause = NO_CAUSE;
 973         StopAllL3Timer(pc);
 974         newl3state(pc, 0);
 975         pc->st->l3.l3l4(pc->st, CC_RELEASE | CONFIRM, pc);
 976         dss1_release_l3_process(pc);
 977 }
 978
 979 #ifdef EXT_BEARER_CAPS
 980
 981 static u_char *
 982 EncodeASyncParams(u_char * p, u_char si2)
 983 {                               // 7c 06 88  90 21 42 00 bb
 984
 985         p[0] = 0;
 986         p[1] = 0x40;            // Intermediate rate: 16 kbit/s jj 2000.02.19
 987         p[2] = 0x80;
 988         if (si2 & 32)           // 7 data bits
 989
 990                 p[2] += 16;
 991         else                    // 8 data bits
 992
 993                 p[2] += 24;
 994
 995         if (si2 & 16)           // 2 stop bits
 996
 997                 p[2] += 96;
 998         else                    // 1 stop bit
 999
1000                 p[2] += 32;
1001
1002         if (si2 & 8)            // even parity
1003
1004                 p[2] += 2;
1005         else                    // no parity
1006
1007                 p[2] += 3;
1008
1009         switch (si2 & 0x07) {
1010                 case 0:
1011                         p[0] = 66;      // 1200 bit/s
1012
1013                         break;
1014                 case 1:
1015                         p[0] = 88;      // 1200/75 bit/s
1016
1017                         break;
1018                 case 2:
1019                         p[0] = 87;      // 75/1200 bit/s
1020
1021                         break;
1022                 case 3:
1023                         p[0] = 67;      // 2400 bit/s
1024
1025                         break;
1026                 case 4:
1027                         p[0] = 69;      // 4800 bit/s
1028
1029                         break;
1030                 case 5:
1031                         p[0] = 72;      // 9600 bit/s
1032
1033                         break;
1034                 case 6:
1035                         p[0] = 73;      // 14400 bit/s
1036
1037                         break;
1038                 case 7:
1039                         p[0] = 75;      // 19200 bit/s
1040
1041                         break;
1042         }
1043         return p + 3;
1044 }
1045
1046 static  u_char
1047 EncodeSyncParams(u_char si2, u_char ai)
1048 {
1049
1050         switch (si2) {
1051                 case 0:
1052                         return ai + 2;  // 1200 bit/s
1053
1054                 case 1:
1055                         return ai + 24;         // 1200/75 bit/s
1056
1057                 case 2:
1058                         return ai + 23;         // 75/1200 bit/s
1059
1060                 case 3:
1061                         return ai + 3;  // 2400 bit/s
1062
1063                 case 4:
1064                         return ai + 5;  // 4800 bit/s
1065
1066                 case 5:
1067                         return ai + 8;  // 9600 bit/s
1068
1069                 case 6:
1070                         return ai + 9;  // 14400 bit/s
1071
1072                 case 7:
1073                         return ai + 11;         // 19200 bit/s
1074
1075                 case 8:
1076                         return ai + 14;         // 48000 bit/s
1077
1078                 case 9:
1079                         return ai + 15;         // 56000 bit/s
1080
1081                 case 15:
1082                         return ai + 40;         // negotiate bit/s
1083
1084                 default:
1085                         break;
1086         }
1087         return ai;
1088 }
1089
1090
1091 static u_char
1092 DecodeASyncParams(u_char si2, u_char * p)
1093 {
1094         u_char info;
1095
1096         switch (p[5]) {
1097                 case 66:        // 1200 bit/s
1098
1099                         break;  // si2 don't change
1100
1101                 case 88:        // 1200/75 bit/s
1102
1103                         si2 += 1;
1104                         break;
1105                 case 87:        // 75/1200 bit/s
1106
1107                         si2 += 2;
1108                         break;
1109                 case 67:        // 2400 bit/s
1110
1111                         si2 += 3;
1112                         break;
1113                 case 69:        // 4800 bit/s
1114
1115                         si2 += 4;
1116                         break;
1117                 case 72:        // 9600 bit/s
1118
1119                         si2 += 5;
1120                         break;
1121                 case 73:        // 14400 bit/s
1122
1123                         si2 += 6;
1124                         break;
1125                 case 75:        // 19200 bit/s
1126
1127                         si2 += 7;
1128                         break;
1129         }
1130
1131         info = p[7] & 0x7f;
1132         if ((info & 16) && (!(info & 8)))       // 7 data bits
1133
1134                 si2 += 32;      // else 8 data bits
1135
1136         if ((info & 96) == 96)  // 2 stop bits
1137
1138                 si2 += 16;      // else 1 stop bit
1139
1140         if ((info & 2) && (!(info & 1)))        // even parity
1141
1142                 si2 += 8;       // else no parity
1143
1144         return si2;
1145 }
1146
1147
1148 static u_char
1149 DecodeSyncParams(u_char si2, u_char info)
1150 {
1151         info &= 0x7f;
1152         switch (info) {
1153                 case 40:        // bit/s negotiation failed  ai := 165 not 175!
1154
1155                         return si2 + 15;
1156                 case 15:        // 56000 bit/s failed, ai := 0 not 169 !
1157
1158                         return si2 + 9;
1159                 case 14:        // 48000 bit/s
1160
1161                         return si2 + 8;
1162                 case 11:        // 19200 bit/s
1163
1164                         return si2 + 7;
1165                 case 9: // 14400 bit/s
1166
1167                         return si2 + 6;
1168                 case 8: // 9600  bit/s
1169
1170                         return si2 + 5;
1171                 case 5: // 4800  bit/s
1172
1173                         return si2 + 4;
1174                 case 3: // 2400  bit/s
1175
1176                         return si2 + 3;
1177                 case 23:        // 75/1200 bit/s
1178
1179                         return si2 + 2;
1180                 case 24:        // 1200/75 bit/s
1181
1182                         return si2 + 1;
1183                 default:        // 1200 bit/s
1184
1185                         return si2;
1186         }
1187 }
1188
1189 static u_char
1190 DecodeSI2(struct sk_buff *skb)
1191 {
1192         u_char *p;              //, *pend=skb->data + skb->len;
1193
1194         if ((p = findie(skb->data, skb->len, 0x7c, 0))) {
1195                 switch (p[4] & 0x0f) {
1196                         case 0x01:
1197                                 if (p[1] == 0x04)       // sync. Bitratenadaption
1198
1199                                         return DecodeSyncParams(160, p[5]);     // V.110/X.30
1200
1201                                 else if (p[1] == 0x06)  // async. Bitratenadaption
1202
1203                                         return DecodeASyncParams(192, p);       // V.110/X.30
1204
1205                                 break;
1206                         case 0x08:      // if (p[5] == 0x02) // sync. Bitratenadaption
1207                                 if (p[1] > 3)
1208                                         return DecodeSyncParams(176, p[5]);     // V.120
1209                                 break;
1210                 }
1211         }
1212         return 0;
1213 }
1214
1215 #endif
1216
1217
1218 static void
1219 l3dss1_setup_req(struct l3_process *pc, u_char pr,
1220                  void *arg)
1221 {
1222         struct sk_buff *skb;
1223         u_char tmp[128];
1224         u_char *p = tmp;
1225         u_char channel = 0;
1226
1227         u_char send_keypad;
1228         u_char screen = 0x80;
1229         u_char *teln;
1230         u_char *msn;
1231         u_char *sub;
1232         u_char *sp;
1233         int l;
1234
1235         MsgHead(p, pc->callref, MT_SETUP);
1236
1237         teln = pc->para.setup.phone;
1238 #ifndef CONFIG_HISAX_NO_KEYPAD
1239         send_keypad = (strchr(teln,'*') || strchr(teln,'#')) ? 1 : 0;
1240 #else
1241         send_keypad = 0;
1242 #endif
1243 #ifndef CONFIG_HISAX_NO_SENDCOMPLETE
1244         if (!send_keypad)
1245                 *p++ = 0xa1;            /* complete indicator */
1246 #endif
1247         /*
1248          * Set Bearer Capability, Map info from 1TR6-convention to EDSS1
1249          */
1250         switch (pc->para.setup.si1) {
1251         case 1:                   /* Telephony                                */
1252                 *p++ = IE_BEARER;
1253                 *p++ = 0x3;       /* Length                                   */
1254                 *p++ = 0x90;      /* Coding Std. CCITT, 3.1 kHz audio         */
1255                 *p++ = 0x90;      /* Circuit-Mode 64kbps                      */
1256                 *p++ = 0xa3;      /* A-Law Audio                              */
1257                 break;
1258         case 5:                   /* Datatransmission 64k, BTX                */
1259         case 7:                   /* Datatransmission 64k                     */
1260         default:
1261                 *p++ = IE_BEARER;
1262                 *p++ = 0x2;       /* Length                                   */
1263                 *p++ = 0x88;      /* Coding Std. CCITT, unrestr. dig. Inform. */
1264                 *p++ = 0x90;      /* Circuit-Mode 64kbps                      */
1265                 break;
1266         }
1267
1268         if (send_keypad) {
1269                 *p++ = IE_KEYPAD;
1270                 *p++ = strlen(teln);
1271                 while (*teln)
1272                         *p++ = (*teln++) & 0x7F;
1273         }
1274
1275         /*
1276          * What about info2? Mapping to High-Layer-Compatibility?
1277          */
1278         if ((*teln) && (!send_keypad)) {
1279                 /* parse number for special things */
1280                 if (!isdigit(*teln)) {
1281                         switch (0x5f & *teln) {
1282                                 case 'C':
1283                                         channel = 0x08;
1284                                 case 'P':
1285                                         channel |= 0x80;
1286                                         teln++;
1287                                         if (*teln == '1')
1288                                                 channel |= 0x01;
1289                                         else
1290                                                 channel |= 0x02;
1291                                         break;
1292                                 case 'R':
1293                                         screen = 0xA0;
1294                                         break;
1295                                 case 'D':
1296                                         screen = 0x80;
1297                                         break;
1298
1299                                 default:
1300                                         if (pc->debug & L3_DEB_WARN)
1301                                                 l3_debug(pc->st, "Wrong MSN Code");
1302                                         break;
1303                         }
1304                         teln++;
1305                 }
1306         }
1307         if (channel) {
1308                 *p++ = IE_CHANNEL_ID;
1309                 *p++ = 1;
1310                 *p++ = channel;
1311         }
1312         msn = pc->para.setup.eazmsn;
1313         sub = NULL;
1314         sp = msn;
1315         while (*sp) {
1316                 if ('.' == *sp) {
1317                         sub = sp;
1318                         *sp = 0;
1319                 } else
1320                         sp++;
1321         }
1322         if (*msn) {
1323                 *p++ = IE_CALLING_PN;
1324                 *p++ = strlen(msn) + (screen ? 2 : 1);
1325                 /* Classify as AnyPref. */
1326                 if (screen) {
1327                         *p++ = 0x01;    /* Ext = '0'B, Type = '000'B, Plan = '0001'B. */
1328                         *p++ = screen;
1329                 } else
1330                         *p++ = 0x81;    /* Ext = '1'B, Type = '000'B, Plan = '0001'B. */
1331                 while (*msn)
1332                         *p++ = *msn++ & 0x7f;
1333         }
1334         if (sub) {
1335                 *sub++ = '.';
1336                 *p++ = IE_CALLING_SUB;
1337                 *p++ = strlen(sub) + 2;
1338                 *p++ = 0x80;    /* NSAP coded */
1339                 *p++ = 0x50;    /* local IDI format */
1340                 while (*sub)
1341                         *p++ = *sub++ & 0x7f;
1342         }
1343         sub = NULL;
1344         sp = teln;
1345         while (*sp) {
1346                 if ('.' == *sp) {
1347                         sub = sp;
1348                         *sp = 0;
1349                 } else
1350                         sp++;
1351         }
1352
1353         if (!send_keypad) {
1354                 *p++ = IE_CALLED_PN;
1355                 *p++ = strlen(teln) + 1;
1356                 /* Classify as AnyPref. */
1357                 *p++ = 0x81;            /* Ext = '1'B, Type = '000'B, Plan = '0001'B. */
1358                 while (*teln)
1359                         *p++ = *teln++ & 0x7f;
1360
1361                 if (sub) {
1362                         *sub++ = '.';
1363                         *p++ = IE_CALLED_SUB;
1364                         *p++ = strlen(sub) + 2;
1365                         *p++ = 0x80;    /* NSAP coded */
1366                         *p++ = 0x50;    /* local IDI format */
1367                         while (*sub)
1368                                 *p++ = *sub++ & 0x7f;
1369                 }
1370         }
1371 #ifdef EXT_BEARER_CAPS
1372         if ((pc->para.setup.si2 >= 160) && (pc->para.setup.si2 <= 175)) {       // sync. Bitratenadaption, V.110/X.30
1373
1374                 *p++ = IE_LLC;
1375                 *p++ = 0x04;
1376                 *p++ = 0x88;
1377                 *p++ = 0x90;
1378                 *p++ = 0x21;
1379                 *p++ = EncodeSyncParams(pc->para.setup.si2 - 160, 0x80);
1380         } else if ((pc->para.setup.si2 >= 176) && (pc->para.setup.si2 <= 191)) {        // sync. Bitratenadaption, V.120
1381
1382                 *p++ = IE_LLC;
1383                 *p++ = 0x05;
1384                 *p++ = 0x88;
1385                 *p++ = 0x90;
1386                 *p++ = 0x28;
1387                 *p++ = EncodeSyncParams(pc->para.setup.si2 - 176, 0);
1388                 *p++ = 0x82;
1389         } else if (pc->para.setup.si2 >= 192) {         // async. Bitratenadaption, V.110/X.30
1390
1391                 *p++ = IE_LLC;
1392                 *p++ = 0x06;
1393                 *p++ = 0x88;
1394                 *p++ = 0x90;
1395                 *p++ = 0x21;
1396                 p = EncodeASyncParams(p, pc->para.setup.si2 - 192);
1397 #ifndef CONFIG_HISAX_NO_LLC
1398         } else {
1399           switch (pc->para.setup.si1) {
1400                 case 1:                 /* Telephony                                */
1401                         *p++ = IE_LLC;
1402                         *p++ = 0x3;     /* Length                                   */
1403                         *p++ = 0x90;    /* Coding Std. CCITT, 3.1 kHz audio         */
1404                         *p++ = 0x90;    /* Circuit-Mode 64kbps                      */
1405                         *p++ = 0xa3;    /* A-Law Audio                              */
1406                         break;
1407                 case 5:                 /* Datatransmission 64k, BTX                */
1408                 case 7:                 /* Datatransmission 64k                     */
1409                 default:
1410                         *p++ = IE_LLC;
1411                         *p++ = 0x2;     /* Length                                   */
1412                         *p++ = 0x88;    /* Coding Std. CCITT, unrestr. dig. Inform. */
1413                         *p++ = 0x90;    /* Circuit-Mode 64kbps                      */
1414                         break;
1415           }
1416 #endif
1417         }
1418 #endif
1419         l = p - tmp;
1420         if (!(skb = l3_alloc_skb(l)))
1421                 return;
1422         memcpy(skb_put(skb, l), tmp, l);
1423         L3DelTimer(&pc->timer);
1424         L3AddTimer(&pc->timer, T303, CC_T303);
1425         newl3state(pc, 1);
1426         l3_msg(pc->st, DL_DATA | REQUEST, skb);
1427 }
1428
1429 static void
1430 l3dss1_call_proc(struct l3_process *pc, u_char pr, void *arg)
1431 {
1432         struct sk_buff *skb = arg;
1433         int id, ret;
1434
1435         if ((id = l3dss1_get_channel_id(pc, skb)) >= 0) {
1436                 if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
1437                         if (pc->debug & L3_DEB_WARN)
1438                                 l3_debug(pc->st, "setup answer with wrong chid %x", id);
1439                         pc->para.cause = 100;
1440                         l3dss1_status_send(pc, pr, NULL);
1441                         return;
1442                 }
1443                 pc->para.bchannel = id;
1444         } else if (1 == pc->state) {
1445                 if (pc->debug & L3_DEB_WARN)
1446                         l3_debug(pc->st, "setup answer wrong chid (ret %d)", id);
1447                 if (id == -1)
1448                         pc->para.cause = 96;
1449                 else
1450                         pc->para.cause = 100;
1451                 l3dss1_status_send(pc, pr, NULL);
1452                 return;
1453         }
1454         /* Now we are on none mandatory IEs */
1455         ret = check_infoelements(pc, skb, ie_CALL_PROCEEDING);
1456         if (ERR_IE_COMPREHENSION == ret) {
1457                 l3dss1_std_ie_err(pc, ret);
1458                 return;
1459         }
1460         L3DelTimer(&pc->timer);
1461         newl3state(pc, 3);
1462         L3AddTimer(&pc->timer, T310, CC_T310);
1463         if (ret) /* STATUS for none mandatory IE errors after actions are taken */
1464                 l3dss1_std_ie_err(pc, ret);
1465         pc->st->l3.l3l4(pc->st, CC_PROCEEDING | INDICATION, pc);
1466 }
1467
1468 static void
1469 l3dss1_setup_ack(struct l3_process *pc, u_char pr, void *arg)
1470 {
1471         struct sk_buff *skb = arg;
1472         int id, ret;
1473
1474         if ((id = l3dss1_get_channel_id(pc, skb)) >= 0) {
1475                 if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
1476                         if (pc->debug & L3_DEB_WARN)
1477                                 l3_debug(pc->st, "setup answer with wrong chid %x", id);
1478                         pc->para.cause = 100;
1479                         l3dss1_status_send(pc, pr, NULL);
1480                         return;
1481                 }
1482                 pc->para.bchannel = id;
1483         } else {
1484                 if (pc->debug & L3_DEB_WARN)
1485                         l3_debug(pc->st, "setup answer wrong chid (ret %d)", id);
1486                 if (id == -1)
1487                         pc->para.cause = 96;
1488                 else
1489                         pc->para.cause = 100;
1490                 l3dss1_status_send(pc, pr, NULL);
1491                 return;
1492         }
1493         /* Now we are on none mandatory IEs */
1494         ret = check_infoelements(pc, skb, ie_SETUP_ACKNOWLEDGE);
1495         if (ERR_IE_COMPREHENSION == ret) {
1496                 l3dss1_std_ie_err(pc, ret);
1497                 return;
1498         }
1499         L3DelTimer(&pc->timer);
1500         newl3state(pc, 2);
1501         L3AddTimer(&pc->timer, T304, CC_T304);
1502         if (ret) /* STATUS for none mandatory IE errors after actions are taken */
1503                 l3dss1_std_ie_err(pc, ret);
1504         pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
1505 }
1506
1507 static void
1508 l3dss1_disconnect(struct l3_process *pc, u_char pr, void *arg)
1509 {
1510         struct sk_buff *skb = arg;
1511         u_char *p;
1512         int ret;
1513         u_char cause = 0;
1514
1515         StopAllL3Timer(pc);
1516         if ((ret = l3dss1_get_cause(pc, skb))) {
1517                 if (pc->debug & L3_DEB_WARN)
1518                         l3_debug(pc->st, "DISC get_cause ret(%d)", ret);
1519                 if (ret < 0)
1520                         cause = 96;
1521                 else if (ret > 0)
1522                         cause = 100;
1523         }
1524         if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
1525                 l3dss1_parse_facility(pc->st, pc, pc->callref, p);
1526         ret = check_infoelements(pc, skb, ie_DISCONNECT);
1527         if (ERR_IE_COMPREHENSION == ret)
1528                 cause = 96;
1529         else if ((!cause) && (ERR_IE_UNRECOGNIZED == ret))
1530                 cause = 99;
1531         ret = pc->state;
1532         newl3state(pc, 12);
1533         if (cause)
1534                 newl3state(pc, 19);
1535         if (11 != ret)
1536                 pc->st->l3.l3l4(pc->st, CC_DISCONNECT | INDICATION, pc);
1537         else if (!cause)
1538                    l3dss1_release_req(pc, pr, NULL);
1539         if (cause) {
1540                 l3dss1_message_cause(pc, MT_RELEASE, cause);
1541                 L3AddTimer(&pc->timer, T308, CC_T308_1);
1542         }
1543 }
1544
1545 static void
1546 l3dss1_connect(struct l3_process *pc, u_char pr, void *arg)
1547 {
1548         struct sk_buff *skb = arg;
1549         int ret;
1550
1551         ret = check_infoelements(pc, skb, ie_CONNECT);
1552         if (ERR_IE_COMPREHENSION == ret) {
1553                 l3dss1_std_ie_err(pc, ret);
1554                 return;
1555         }
1556         L3DelTimer(&pc->timer); /* T310 */
1557         newl3state(pc, 10);
1558         pc->para.chargeinfo = 0;
1559         /* here should inserted COLP handling KKe */
1560         if (ret)
1561                 l3dss1_std_ie_err(pc, ret);
1562         pc->st->l3.l3l4(pc->st, CC_SETUP | CONFIRM, pc);
1563 }
1564
1565 static void
1566 l3dss1_alerting(struct l3_process *pc, u_char pr, void *arg)
1567 {
1568         struct sk_buff *skb = arg;
1569         int ret;
1570
1571         ret = check_infoelements(pc, skb, ie_ALERTING);
1572         if (ERR_IE_COMPREHENSION == ret) {
1573                 l3dss1_std_ie_err(pc, ret);
1574                 return;
1575         }
1576         L3DelTimer(&pc->timer); /* T304 */
1577         newl3state(pc, 4);
1578         if (ret)
1579                 l3dss1_std_ie_err(pc, ret);
1580         pc->st->l3.l3l4(pc->st, CC_ALERTING | INDICATION, pc);
1581 }
1582
1583 static void
1584 l3dss1_setup(struct l3_process *pc, u_char pr, void *arg)
1585 {
1586         u_char *p;
1587         int bcfound = 0;
1588         char tmp[80];
1589         struct sk_buff *skb = arg;
1590         int id;
1591         int err = 0;
1592
1593         /*
1594          * Bearer Capabilities
1595          */
1596         p = skb->data;
1597         /* only the first occurence 'll be detected ! */
1598         if ((p = findie(p, skb->len, 0x04, 0))) {
1599                 if ((p[1] < 2) || (p[1] > 11))
1600                         err = 1;
1601                 else {
1602                         pc->para.setup.si2 = 0;
1603                         switch (p[2] & 0x7f) {
1604                                 case 0x00: /* Speech */
1605                                 case 0x10: /* 3.1 Khz audio */
1606                                         pc->para.setup.si1 = 1;
1607                                         break;
1608                                 case 0x08: /* Unrestricted digital information */
1609                                         pc->para.setup.si1 = 7;
1610 /* JIM, 05.11.97 I wanna set service indicator 2 */
1611 #ifdef EXT_BEARER_CAPS
1612                                         pc->para.setup.si2 = DecodeSI2(skb);
1613 #endif
1614                                         break;
1615                                 case 0x09: /* Restricted digital information */
1616                                         pc->para.setup.si1 = 2;
1617                                         break;
1618                                 case 0x11:
1619                                         /* Unrestr. digital information  with
1620                                          * tones/announcements ( or 7 kHz audio
1621                                          */
1622                                         pc->para.setup.si1 = 3;
1623                                         break;
1624                                 case 0x18: /* Video */
1625                                         pc->para.setup.si1 = 4;
1626                                         break;
1627                                 default:
1628                                         err = 2;
1629                                         break;
1630                         }
1631                         switch (p[3] & 0x7f) {
1632                                 case 0x40: /* packed mode */
1633                                         pc->para.setup.si1 = 8;
1634                                         break;
1635                                 case 0x10: /* 64 kbit */
1636                                 case 0x11: /* 2*64 kbit */
1637                                 case 0x13: /* 384 kbit */
1638                                 case 0x15: /* 1536 kbit */
1639                                 case 0x17: /* 1920 kbit */
1640                                         pc->para.moderate = p[3] & 0x7f;
1641                                         break;
1642                                 default:
1643                                         err = 3;
1644                                         break;
1645                         }
1646                 }
1647                 if (pc->debug & L3_DEB_SI)
1648                         l3_debug(pc->st, "SI=%d, AI=%d",
1649                                 pc->para.setup.si1, pc->para.setup.si2);
1650                 if (err) {
1651                         if (pc->debug & L3_DEB_WARN)
1652                                 l3_debug(pc->st, "setup with wrong bearer(l=%d:%x,%x)",
1653                                         p[1], p[2], p[3]);
1654                         pc->para.cause = 100;
1655                         l3dss1_msg_without_setup(pc, pr, NULL);
1656                         return;
1657                 }
1658         } else {
1659                 if (pc->debug & L3_DEB_WARN)
1660                         l3_debug(pc->st, "setup without bearer capabilities");
1661                 /* ETS 300-104 1.3.3 */
1662                 pc->para.cause = 96;
1663                 l3dss1_msg_without_setup(pc, pr, NULL);
1664                 return;
1665         }
1666         /*
1667          * Channel Identification
1668          */
1669         if ((id = l3dss1_get_channel_id(pc, skb)) >= 0) {
1670                 if ((pc->para.bchannel = id)) {
1671                         if ((3 == id) && (0x10 == pc->para.moderate)) {
1672                                 if (pc->debug & L3_DEB_WARN)
1673                                         l3_debug(pc->st, "setup with wrong chid %x",
1674                                                 id);
1675                                 pc->para.cause = 100;
1676                                 l3dss1_msg_without_setup(pc, pr, NULL);
1677                                 return;
1678                         }
1679                         bcfound++;
1680                 } else
1681                    { if (pc->debug & L3_DEB_WARN)
1682                          l3_debug(pc->st, "setup without bchannel, call waiting");
1683                      bcfound++;
1684                    }
1685         } else {
1686                 if (pc->debug & L3_DEB_WARN)
1687                         l3_debug(pc->st, "setup with wrong chid ret %d", id);
1688                 if (id == -1)
1689                         pc->para.cause = 96;
1690                 else
1691                         pc->para.cause = 100;
1692                 l3dss1_msg_without_setup(pc, pr, NULL);
1693                 return;
1694         }
1695         /* Now we are on none mandatory IEs */
1696         err = check_infoelements(pc, skb, ie_SETUP);
1697         if (ERR_IE_COMPREHENSION == err) {
1698                 pc->para.cause = 96;
1699                 l3dss1_msg_without_setup(pc, pr, NULL);
1700                 return;
1701         }
1702         p = skb->data;
1703         if ((p = findie(p, skb->len, 0x70, 0)))
1704                 iecpy(pc->para.setup.eazmsn, p, 1);
1705         else
1706                 pc->para.setup.eazmsn[0] = 0;
1707
1708         p = skb->data;
1709         if ((p = findie(p, skb->len, 0x71, 0))) {
1710                 /* Called party subaddress */
1711                 if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) {
1712                         tmp[0] = '.';
1713                         iecpy(&tmp[1], p, 2);
1714                         strcat(pc->para.setup.eazmsn, tmp);
1715                 } else if (pc->debug & L3_DEB_WARN)
1716                         l3_debug(pc->st, "wrong called subaddress");
1717         }
1718         p = skb->data;
1719         if ((p = findie(p, skb->len, 0x6c, 0))) {
1720                 pc->para.setup.plan = p[2];
1721                 if (p[2] & 0x80) {
1722                         iecpy(pc->para.setup.phone, p, 1);
1723                         pc->para.setup.screen = 0;
1724                 } else {
1725                         iecpy(pc->para.setup.phone, p, 2);
1726                         pc->para.setup.screen = p[3];
1727                 }
1728         } else {
1729                 pc->para.setup.phone[0] = 0;
1730                 pc->para.setup.plan = 0;
1731                 pc->para.setup.screen = 0;
1732         }
1733         p = skb->data;
1734         if ((p = findie(p, skb->len, 0x6d, 0))) {
1735                 /* Calling party subaddress */
1736                 if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) {
1737                         tmp[0] = '.';
1738                         iecpy(&tmp[1], p, 2);
1739                         strcat(pc->para.setup.phone, tmp);
1740                 } else if (pc->debug & L3_DEB_WARN)
1741                         l3_debug(pc->st, "wrong calling subaddress");
1742         }
1743         newl3state(pc, 6);
1744         if (err) /* STATUS for none mandatory IE errors after actions are taken */
1745                 l3dss1_std_ie_err(pc, err);
1746         pc->st->l3.l3l4(pc->st, CC_SETUP | INDICATION, pc);
1747 }
1748
1749 static void
1750 l3dss1_reset(struct l3_process *pc, u_char pr, void *arg)
1751 {
1752         dss1_release_l3_process(pc);
1753 }
1754
1755 static void
1756 l3dss1_disconnect_req(struct l3_process *pc, u_char pr, void *arg)
1757 {
1758         struct sk_buff *skb;
1759         u_char tmp[16+40];
1760         u_char *p = tmp;
1761         int l;
1762         u_char cause = 16;
1763
1764         if (pc->para.cause != NO_CAUSE)
1765                 cause = pc->para.cause;
1766
1767         StopAllL3Timer(pc);
1768
1769         MsgHead(p, pc->callref, MT_DISCONNECT);
1770
1771         *p++ = IE_CAUSE;
1772         *p++ = 0x2;
1773         *p++ = 0x80;
1774         *p++ = cause | 0x80;
1775
1776         if (pc->prot.dss1.uus1_data[0])
1777          { *p++ = IE_USER_USER; /* UUS info element */
1778            *p++ = strlen(pc->prot.dss1.uus1_data) + 1;
1779            *p++ = 0x04; /* IA5 chars */
1780            strcpy(p,pc->prot.dss1.uus1_data);
1781            p += strlen(pc->prot.dss1.uus1_data);
1782            pc->prot.dss1.uus1_data[0] = '\0';
1783          }
1784
1785         l = p - tmp;
1786         if (!(skb = l3_alloc_skb(l)))
1787                 return;
1788         memcpy(skb_put(skb, l), tmp, l);
1789         newl3state(pc, 11);
1790         l3_msg(pc->st, DL_DATA | REQUEST, skb);
1791         L3AddTimer(&pc->timer, T305, CC_T305);
1792 }
1793
1794 static void
1795 l3dss1_setup_rsp(struct l3_process *pc, u_char pr,
1796                  void *arg)
1797 {
1798         if (!pc->para.bchannel)
1799          { if (pc->debug & L3_DEB_WARN)
1800                l3_debug(pc->st, "D-chan connect for waiting call");
1801            l3dss1_disconnect_req(pc, pr, arg);
1802            return;
1803          }
1804         newl3state(pc, 8);
1805         l3dss1_message(pc, MT_CONNECT);
1806         L3DelTimer(&pc->timer);
1807         L3AddTimer(&pc->timer, T313, CC_T313);
1808 }
1809
1810 static void
1811 l3dss1_connect_ack(struct l3_process *pc, u_char pr, void *arg)
1812 {
1813         struct sk_buff *skb = arg;
1814         int ret;
1815
1816         ret = check_infoelements(pc, skb, ie_CONNECT_ACKNOWLEDGE);
1817         if (ERR_IE_COMPREHENSION == ret) {
1818                 l3dss1_std_ie_err(pc, ret);
1819                 return;
1820         }
1821         newl3state(pc, 10);
1822         L3DelTimer(&pc->timer);
1823         if (ret)
1824                 l3dss1_std_ie_err(pc, ret);
1825         pc->st->l3.l3l4(pc->st, CC_SETUP_COMPL | INDICATION, pc);
1826 }
1827
1828 static void
1829 l3dss1_reject_req(struct l3_process *pc, u_char pr, void *arg)
1830 {
1831         struct sk_buff *skb;
1832         u_char tmp[16];
1833         u_char *p = tmp;
1834         int l;
1835         u_char cause = 21;
1836
1837         if (pc->para.cause != NO_CAUSE)
1838                 cause = pc->para.cause;
1839
1840         MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
1841
1842         *p++ = IE_CAUSE;
1843         *p++ = 0x2;
1844         *p++ = 0x80;
1845         *p++ = cause | 0x80;
1846
1847         l = p - tmp;
1848         if (!(skb = l3_alloc_skb(l)))
1849                 return;
1850         memcpy(skb_put(skb, l), tmp, l);
1851         l3_msg(pc->st, DL_DATA | REQUEST, skb);
1852         pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
1853         newl3state(pc, 0);
1854         dss1_release_l3_process(pc);
1855 }
1856
1857 static void
1858 l3dss1_release(struct l3_process *pc, u_char pr, void *arg)
1859 {
1860         struct sk_buff *skb = arg;
1861         u_char *p;
1862         int ret, cause=0;
1863
1864         StopAllL3Timer(pc);
1865         if ((ret = l3dss1_get_cause(pc, skb))>0) {
1866                 if (pc->debug & L3_DEB_WARN)
1867                         l3_debug(pc->st, "REL get_cause ret(%d)", ret);
1868         } else if (ret<0)
1869                 pc->para.cause = NO_CAUSE;
1870         if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
1871                 l3dss1_parse_facility(pc->st, pc, pc->callref, p);
1872         }
1873         if ((ret<0) && (pc->state != 11))
1874                 cause = 96;
1875         else if (ret>0)
1876                 cause = 100;
1877         ret = check_infoelements(pc, skb, ie_RELEASE);
1878         if (ERR_IE_COMPREHENSION == ret)
1879                 cause = 96;
1880         else if ((ERR_IE_UNRECOGNIZED == ret) && (!cause))
1881                 cause = 99;
1882         if (cause)
1883                 l3dss1_message_cause(pc, MT_RELEASE_COMPLETE, cause);
1884         else
1885                 l3dss1_message(pc, MT_RELEASE_COMPLETE);
1886         pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
1887         newl3state(pc, 0);
1888         dss1_release_l3_process(pc);
1889 }
1890
1891 static void
1892 l3dss1_alert_req(struct l3_process *pc, u_char pr,
1893                  void *arg)
1894 {
1895         newl3state(pc, 7);
1896         if (!pc->prot.dss1.uus1_data[0])
1897                 l3dss1_message(pc, MT_ALERTING);
1898         else
1899                 l3dss1_msg_with_uus(pc, MT_ALERTING);
1900 }
1901
1902 static void
1903 l3dss1_proceed_req(struct l3_process *pc, u_char pr,
1904                    void *arg)
1905 {
1906         newl3state(pc, 9);
1907         l3dss1_message(pc, MT_CALL_PROCEEDING);
1908         pc->st->l3.l3l4(pc->st, CC_PROCEED_SEND | INDICATION, pc);
1909 }
1910
1911 static void
1912 l3dss1_setup_ack_req(struct l3_process *pc, u_char pr,
1913                    void *arg)
1914 {
1915         newl3state(pc, 25);
1916         L3DelTimer(&pc->timer);
1917         L3AddTimer(&pc->timer, T302, CC_T302);
1918         l3dss1_message(pc, MT_SETUP_ACKNOWLEDGE);
1919 }
1920
1921 /********************************************/
1922 /* deliver a incoming display message to HL */
1923 /********************************************/
1924 static void
1925 l3dss1_deliver_display(struct l3_process *pc, int pr, u_char *infp)
1926 {       u_char len;
1927         isdn_ctrl ic;
1928         struct IsdnCardState *cs;
1929         char *p;
1930
1931         if (*infp++ != IE_DISPLAY) return;
1932         if ((len = *infp++) > 80) return; /* total length <= 82 */
1933         if (!pc->chan) return;
1934
1935         p = ic.parm.display;
1936         while (len--)
1937           *p++ = *infp++;
1938         *p = '\0';
1939         ic.command = ISDN_STAT_DISPLAY;
1940         cs = pc->st->l1.hardware;
1941         ic.driver = cs->myid;
1942         ic.arg = pc->chan->chan;
1943         cs->iif.statcallb(&ic);
1944 } /* l3dss1_deliver_display */
1945
1946
1947 static void
1948 l3dss1_progress(struct l3_process *pc, u_char pr, void *arg)
1949 {
1950         struct sk_buff *skb = arg;
1951         int err = 0;
1952         u_char *p;
1953
1954         if ((p = findie(skb->data, skb->len, IE_PROGRESS, 0))) {
1955                 if (p[1] != 2) {
1956                         err = 1;
1957                         pc->para.cause = 100;
1958                 } else if (!(p[2] & 0x70)) {
1959                         switch (p[2]) {
1960                                 case 0x80:
1961                                 case 0x81:
1962                                 case 0x82:
1963                                 case 0x84:
1964                                 case 0x85:
1965                                 case 0x87:
1966                                 case 0x8a:
1967                                         switch (p[3]) {
1968                                                 case 0x81:
1969                                                 case 0x82:
1970                                                 case 0x83:
1971                                                 case 0x84:
1972                                                 case 0x88:
1973                                                         break;
1974                                                 default:
1975                                                         err = 2;
1976                                                         pc->para.cause = 100;
1977                                                         break;
1978                                         }
1979                                         break;
1980                                 default:
1981                                         err = 3;
1982                                         pc->para.cause = 100;
1983                                         break;
1984                         }
1985                 }
1986         } else {
1987                 pc->para.cause = 96;
1988                 err = 4;
1989         }
1990         if (err) {
1991                 if (pc->debug & L3_DEB_WARN)
1992                         l3_debug(pc->st, "progress error %d", err);
1993                 l3dss1_status_send(pc, pr, NULL);
1994                 return;
1995         }
1996         /* Now we are on none mandatory IEs */
1997         err = check_infoelements(pc, skb, ie_PROGRESS);
1998         if (err)
1999                 l3dss1_std_ie_err(pc, err);
2000         if (ERR_IE_COMPREHENSION != err)
2001                 pc->st->l3.l3l4(pc->st, CC_PROGRESS | INDICATION, pc);
2002 }
2003
2004 static void
2005 l3dss1_notify(struct l3_process *pc, u_char pr, void *arg)
2006 {
2007         struct sk_buff *skb = arg;
2008         int err = 0;
2009         u_char *p;
2010
2011         if ((p = findie(skb->data, skb->len, IE_NOTIFY, 0))) {
2012                 if (p[1] != 1) {
2013                         err = 1;
2014                         pc->para.cause = 100;
2015                 } else {
2016                         switch (p[2]) {
2017                                 case 0x80:
2018                                 case 0x81:
2019                                 case 0x82:
2020                                         break;
2021                                 default:
2022                                         pc->para.cause = 100;
2023                                         err = 2;
2024                                         break;
2025                         }
2026                 }
2027         } else {
2028                 pc->para.cause = 96;
2029                 err = 3;
2030         }
2031         if (err) {
2032                 if (pc->debug & L3_DEB_WARN)
2033                         l3_debug(pc->st, "notify error %d", err);
2034                 l3dss1_status_send(pc, pr, NULL);
2035                 return;
2036         }
2037         /* Now we are on none mandatory IEs */
2038         err = check_infoelements(pc, skb, ie_NOTIFY);
2039         if (err)
2040                 l3dss1_std_ie_err(pc, err);
2041         if (ERR_IE_COMPREHENSION != err)
2042                 pc->st->l3.l3l4(pc->st, CC_NOTIFY | INDICATION, pc);
2043 }
2044
2045 static void
2046 l3dss1_status_enq(struct l3_process *pc, u_char pr, void *arg)
2047 {
2048         int ret;
2049         struct sk_buff *skb = arg;
2050
2051         ret = check_infoelements(pc, skb, ie_STATUS_ENQUIRY);
2052         l3dss1_std_ie_err(pc, ret);
2053         pc->para.cause = 30; /* response to STATUS_ENQUIRY */
2054         l3dss1_status_send(pc, pr, NULL);
2055 }
2056
2057 static void
2058 l3dss1_information(struct l3_process *pc, u_char pr, void *arg)
2059 {
2060         int ret;
2061         struct sk_buff *skb = arg;
2062         u_char *p;
2063         char tmp[32];
2064
2065         ret = check_infoelements(pc, skb, ie_INFORMATION);
2066         if (ret)
2067                 l3dss1_std_ie_err(pc, ret);
2068         if (pc->state == 25) { /* overlap receiving */
2069                 L3DelTimer(&pc->timer);
2070                 p = skb->data;
2071                 if ((p = findie(p, skb->len, 0x70, 0))) {
2072                         iecpy(tmp, p, 1);
2073                         strcat(pc->para.setup.eazmsn, tmp);
2074                         pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
2075                 }
2076                 L3AddTimer(&pc->timer, T302, CC_T302);
2077         }
2078 }
2079
2080 /******************************/
2081 /* handle deflection requests */
2082 /******************************/
2083 static void l3dss1_redir_req(struct l3_process *pc, u_char pr, void *arg)
2084 {
2085         struct sk_buff *skb;
2086         u_char tmp[128];
2087         u_char *p = tmp;
2088         u_char *subp;
2089         u_char len_phone = 0;
2090         u_char len_sub = 0;
2091         int l;
2092
2093
2094         strcpy(pc->prot.dss1.uus1_data,pc->chan->setup.eazmsn); /* copy uus element if available */
2095         if (!pc->chan->setup.phone[0])
2096           { pc->para.cause = -1;
2097             l3dss1_disconnect_req(pc,pr,arg); /* disconnect immediately */
2098             return;
2099           } /* only uus */
2100
2101         if (pc->prot.dss1.invoke_id)
2102           free_invoke_id(pc->st,pc->prot.dss1.invoke_id);
2103
2104         if (!(pc->prot.dss1.invoke_id = new_invoke_id(pc->st)))
2105           return;
2106
2107         MsgHead(p, pc->callref, MT_FACILITY);
2108
2109         for (subp = pc->chan->setup.phone; (*subp) && (*subp != '.'); subp++) len_phone++; /* len of phone number */
2110         if (*subp++ == '.') len_sub = strlen(subp) + 2; /* length including info subaddress element */
2111
2112         *p++ = 0x1c;   /* Facility info element */
2113         *p++ = len_phone + len_sub + 2 + 2 + 8 + 3 + 3; /* length of element */
2114         *p++ = 0x91;  /* remote operations protocol */
2115         *p++ = 0xa1;  /* invoke component */
2116
2117         *p++ = len_phone + len_sub + 2 + 2 + 8 + 3; /* length of data */
2118         *p++ = 0x02;  /* invoke id tag, integer */
2119         *p++ = 0x01;  /* length */
2120         *p++ = pc->prot.dss1.invoke_id;  /* invoke id */
2121         *p++ = 0x02;  /* operation value tag, integer */
2122         *p++ = 0x01;  /* length */
2123         *p++ = 0x0D;  /* Call Deflect */
2124
2125         *p++ = 0x30;  /* sequence phone number */
2126         *p++ = len_phone + 2 + 2 + 3 + len_sub; /* length */
2127
2128         *p++ = 0x30;  /* Deflected to UserNumber */
2129         *p++ = len_phone+2+len_sub; /* length */
2130         *p++ = 0x80; /* NumberDigits */
2131         *p++ = len_phone; /* length */
2132         for (l = 0; l < len_phone; l++)
2133          *p++ = pc->chan->setup.phone[l];
2134
2135         if (len_sub)
2136           { *p++ = 0x04; /* called party subaddress */
2137             *p++ = len_sub - 2;
2138             while (*subp) *p++ = *subp++;
2139           }
2140
2141         *p++ = 0x01; /* screening identifier */
2142         *p++ = 0x01;
2143         *p++ = pc->chan->setup.screen;
2144
2145         l = p - tmp;
2146         if (!(skb = l3_alloc_skb(l))) return;
2147         memcpy(skb_put(skb, l), tmp, l);
2148
2149         l3_msg(pc->st, DL_DATA | REQUEST, skb);
2150 } /* l3dss1_redir_req */
2151
2152 /********************************************/
2153 /* handle deflection request in early state */
2154 /********************************************/
2155 static void l3dss1_redir_req_early(struct l3_process *pc, u_char pr, void *arg)
2156 {
2157   l3dss1_proceed_req(pc,pr,arg);
2158   l3dss1_redir_req(pc,pr,arg);
2159 } /* l3dss1_redir_req_early */
2160
2161 /***********************************************/
2162 /* handle special commands for this protocol.  */
2163 /* Examples are call independant services like */
2164 /* remote operations with dummy  callref.      */
2165 /***********************************************/
2166 static int l3dss1_cmd_global(struct PStack *st, isdn_ctrl *ic)
2167 { u_char id;
2168   u_char temp[265];
2169   u_char *p = temp;
2170   int i, l, proc_len;
2171   struct sk_buff *skb;
2172   struct l3_process *pc = NULL;
2173
2174   switch (ic->arg)
2175    { case DSS1_CMD_INVOKE:
2176        if (ic->parm.dss1_io.datalen < 0) return(-2); /* invalid parameter */
2177
2178        for (proc_len = 1, i = ic->parm.dss1_io.proc >> 8; i; i++)
2179          i = i >> 8; /* add one byte */
2180        l = ic->parm.dss1_io.datalen + proc_len + 8; /* length excluding ie header */
2181        if (l > 255)
2182          return(-2); /* too long */
2183
2184        if (!(id = new_invoke_id(st)))
2185          return(0); /* first get a invoke id -> return if no available */
2186
2187        i = -1;
2188        MsgHead(p, i, MT_FACILITY); /* build message head */
2189        *p++ = 0x1C; /* Facility IE */
2190        *p++ = l; /* length of ie */
2191        *p++ = 0x91; /* remote operations */
2192        *p++ = 0xA1; /* invoke */
2193        *p++ = l - 3; /* length of invoke */
2194        *p++ = 0x02; /* invoke id tag */
2195        *p++ = 0x01; /* length is 1 */
2196        *p++ = id; /* invoke id */
2197        *p++ = 0x02; /* operation */
2198        *p++ = proc_len; /* length of operation */
2199
2200        for (i = proc_len; i; i--)
2201          *p++ = (ic->parm.dss1_io.proc >> (i-1)) & 0xFF;
2202        memcpy(p, ic->parm.dss1_io.data, ic->parm.dss1_io.datalen); /* copy data */
2203        l = (p - temp) + ic->parm.dss1_io.datalen; /* total length */
2204
2205        if (ic->parm.dss1_io.timeout > 0)
2206         if (!(pc = dss1_new_l3_process(st, -1)))
2207           { free_invoke_id(st, id);
2208             return(-2);
2209           }
2210        pc->prot.dss1.ll_id = ic->parm.dss1_io.ll_id; /* remember id */
2211        pc->prot.dss1.proc = ic->parm.dss1_io.proc; /* and procedure */
2212
2213        if (!(skb = l3_alloc_skb(l)))
2214          { free_invoke_id(st, id);
2215            if (pc) dss1_release_l3_process(pc);
2216            return(-2);
2217          }
2218        memcpy(skb_put(skb, l), temp, l);
2219
2220        if (pc)
2221         { pc->prot.dss1.invoke_id = id; /* remember id */
2222           L3AddTimer(&pc->timer, ic->parm.dss1_io.timeout, CC_TDSS1_IO | REQUEST);
2223         }
2224
2225        l3_msg(st, DL_DATA | REQUEST, skb);
2226        ic->parm.dss1_io.hl_id = id; /* return id */
2227        return(0);
2228
2229      case DSS1_CMD_INVOKE_ABORT:
2230        if ((pc = l3dss1_search_dummy_proc(st, ic->parm.dss1_io.hl_id)))
2231         { L3DelTimer(&pc->timer); /* remove timer */
2232           dss1_release_l3_process(pc);
2233           return(0);
2234         }
2235        else
2236         { l3_debug(st, "l3dss1_cmd_global abort unknown id");
2237           return(-2);
2238         }
2239        break;
2240
2241      default:
2242        l3_debug(st, "l3dss1_cmd_global unknown cmd 0x%lx", ic->arg);
2243        return(-1);
2244    } /* switch ic-> arg */
2245   return(-1);
2246 } /* l3dss1_cmd_global */
2247
2248 static void
2249 l3dss1_io_timer(struct l3_process *pc)
2250 { isdn_ctrl ic;
2251   struct IsdnCardState *cs = pc->st->l1.hardware;
2252
2253   L3DelTimer(&pc->timer); /* remove timer */
2254
2255   ic.driver = cs->myid;
2256   ic.command = ISDN_STAT_PROT;
2257   ic.arg = DSS1_STAT_INVOKE_ERR;
2258   ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
2259   ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
2260   ic.parm.dss1_io.proc = pc->prot.dss1.proc;
2261   ic.parm.dss1_io.timeout= -1;
2262   ic.parm.dss1_io.datalen = 0;
2263   ic.parm.dss1_io.data = NULL;
2264   free_invoke_id(pc->st, pc->prot.dss1.invoke_id);
2265   pc->prot.dss1.invoke_id = 0; /* reset id */
2266
2267   cs->iif.statcallb(&ic);
2268
2269   dss1_release_l3_process(pc);
2270 } /* l3dss1_io_timer */
2271
2272 static void
2273 l3dss1_release_ind(struct l3_process *pc, u_char pr, void *arg)
2274 {
2275         u_char *p;
2276         struct sk_buff *skb = arg;
2277         int callState = 0;
2278         p = skb->data;
2279
2280         if ((p = findie(p, skb->len, IE_CALL_STATE, 0))) {
2281                 p++;
2282                 if (1 == *p++)
2283                         callState = *p;
2284         }
2285         if (callState == 0) {
2286                 /* ETS 300-104 7.6.1, 8.6.1, 10.6.1... and 16.1
2287                  * set down layer 3 without sending any message
2288                  */
2289                 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2290                 newl3state(pc, 0);
2291                 dss1_release_l3_process(pc);
2292         } else {
2293                 pc->st->l3.l3l4(pc->st, CC_IGNORE | INDICATION, pc);
2294         }
2295 }
2296
2297 static void
2298 l3dss1_dummy(struct l3_process *pc, u_char pr, void *arg)
2299 {
2300 }
2301
2302 static void
2303 l3dss1_t302(struct l3_process *pc, u_char pr, void *arg)
2304 {
2305         L3DelTimer(&pc->timer);
2306         pc->para.loc = 0;
2307         pc->para.cause = 28; /* invalid number */
2308         l3dss1_disconnect_req(pc, pr, NULL);
2309         pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2310 }
2311
2312 static void
2313 l3dss1_t303(struct l3_process *pc, u_char pr, void *arg)
2314 {
2315         if (pc->N303 > 0) {
2316                 pc->N303--;
2317                 L3DelTimer(&pc->timer);
2318                 l3dss1_setup_req(pc, pr, arg);
2319         } else {
2320                 L3DelTimer(&pc->timer);
2321                 l3dss1_message_cause(pc, MT_RELEASE_COMPLETE, 102);
2322                 pc->st->l3.l3l4(pc->st, CC_NOSETUP_RSP, pc);
2323                 dss1_release_l3_process(pc);
2324         }
2325 }
2326
2327 static void
2328 l3dss1_t304(struct l3_process *pc, u_char pr, void *arg)
2329 {
2330         L3DelTimer(&pc->timer);
2331         pc->para.loc = 0;
2332         pc->para.cause = 102;
2333         l3dss1_disconnect_req(pc, pr, NULL);
2334         pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2335
2336 }
2337
2338 static void
2339 l3dss1_t305(struct l3_process *pc, u_char pr, void *arg)
2340 {
2341         u_char tmp[16];
2342         u_char *p = tmp;
2343         int l;
2344         struct sk_buff *skb;
2345         u_char cause = 16;
2346
2347         L3DelTimer(&pc->timer);
2348         if (pc->para.cause != NO_CAUSE)
2349                 cause = pc->para.cause;
2350
2351         MsgHead(p, pc->callref, MT_RELEASE);
2352
2353         *p++ = IE_CAUSE;
2354         *p++ = 0x2;
2355         *p++ = 0x80;
2356         *p++ = cause | 0x80;
2357
2358         l = p - tmp;
2359         if (!(skb = l3_alloc_skb(l)))
2360                 return;
2361         memcpy(skb_put(skb, l), tmp, l);
2362         newl3state(pc, 19);
2363         l3_msg(pc->st, DL_DATA | REQUEST, skb);
2364         L3AddTimer(&pc->timer, T308, CC_T308_1);
2365 }
2366
2367 static void
2368 l3dss1_t310(struct l3_process *pc, u_char pr, void *arg)
2369 {
2370         L3DelTimer(&pc->timer);
2371         pc->para.loc = 0;
2372         pc->para.cause = 102;
2373         l3dss1_disconnect_req(pc, pr, NULL);
2374         pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2375 }
2376
2377 static void
2378 l3dss1_t313(struct l3_process *pc, u_char pr, void *arg)
2379 {
2380         L3DelTimer(&pc->timer);
2381         pc->para.loc = 0;
2382         pc->para.cause = 102;
2383         l3dss1_disconnect_req(pc, pr, NULL);
2384         pc->st->l3.l3l4(pc->st, CC_CONNECT_ERR, pc);
2385 }
2386
2387 static void
2388 l3dss1_t308_1(struct l3_process *pc, u_char pr, void *arg)
2389 {
2390         newl3state(pc, 19);
2391         L3DelTimer(&pc->timer);
2392         l3dss1_message(pc, MT_RELEASE);
2393         L3AddTimer(&pc->timer, T308, CC_T308_2);
2394 }
2395
2396 static void
2397 l3dss1_t308_2(struct l3_process *pc, u_char pr, void *arg)
2398 {
2399         L3DelTimer(&pc->timer);
2400         pc->st->l3.l3l4(pc->st, CC_RELEASE_ERR, pc);
2401         dss1_release_l3_process(pc);
2402 }
2403
2404 static void
2405 l3dss1_t318(struct l3_process *pc, u_char pr, void *arg)
2406 {
2407         L3DelTimer(&pc->timer);
2408         pc->para.cause = 102;   /* Timer expiry */
2409         pc->para.loc = 0;       /* local */
2410         pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc);
2411         newl3state(pc, 19);
2412         l3dss1_message(pc, MT_RELEASE);
2413         L3AddTimer(&pc->timer, T308, CC_T308_1);
2414 }
2415
2416 static void
2417 l3dss1_t319(struct l3_process *pc, u_char pr, void *arg)
2418 {
2419         L3DelTimer(&pc->timer);
2420         pc->para.cause = 102;   /* Timer expiry */
2421         pc->para.loc = 0;       /* local */
2422         pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc);
2423         newl3state(pc, 10);
2424 }
2425
2426 static void
2427 l3dss1_restart(struct l3_process *pc, u_char pr, void *arg)
2428 {
2429         L3DelTimer(&pc->timer);
2430         pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2431         dss1_release_l3_process(pc);
2432 }
2433
2434 static void
2435 l3dss1_status(struct l3_process *pc, u_char pr, void *arg)
2436 {
2437         u_char *p;
2438         struct sk_buff *skb = arg;
2439         int ret;
2440         u_char cause = 0, callState = 0;
2441
2442         if ((ret = l3dss1_get_cause(pc, skb))) {
2443                 if (pc->debug & L3_DEB_WARN)
2444                         l3_debug(pc->st, "STATUS get_cause ret(%d)",ret);
2445                 if (ret < 0)
2446                         cause = 96;
2447                 else if (ret > 0)
2448                         cause = 100;
2449         }
2450         if ((p = findie(skb->data, skb->len, IE_CALL_STATE, 0))) {
2451                 p++;
2452                 if (1 == *p++) {
2453                         callState = *p;
2454                         if (!ie_in_set(pc, *p, l3_valid_states))
2455                                 cause = 100;
2456                 } else
2457                         cause = 100;
2458         } else
2459                 cause = 96;
2460         if (!cause) { /*  no error before */
2461                 ret = check_infoelements(pc, skb, ie_STATUS);
2462                 if (ERR_IE_COMPREHENSION == ret)
2463                         cause = 96;
2464                 else if (ERR_IE_UNRECOGNIZED == ret)
2465                         cause = 99;
2466         }
2467         if (cause) {
2468                 u_char tmp;
2469
2470                 if (pc->debug & L3_DEB_WARN)
2471                         l3_debug(pc->st, "STATUS error(%d/%d)",ret,cause);
2472                 tmp = pc->para.cause;
2473                 pc->para.cause = cause;
2474                 l3dss1_status_send(pc, 0, NULL);
2475                 if (cause == 99)
2476                         pc->para.cause = tmp;
2477                 else
2478                         return;
2479         }
2480         cause = pc->para.cause;
2481         if (((cause & 0x7f) == 111) && (callState == 0)) {
2482                 /* ETS 300-104 7.6.1, 8.6.1, 10.6.1...
2483                  * if received MT_STATUS with cause == 111 and call
2484                  * state == 0, then we must set down layer 3
2485                  */
2486                 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2487                 newl3state(pc, 0);
2488                 dss1_release_l3_process(pc);
2489         }
2490 }
2491
2492 static void
2493 l3dss1_facility(struct l3_process *pc, u_char pr, void *arg)
2494 {
2495         struct sk_buff *skb = arg;
2496         int ret;
2497
2498         ret = check_infoelements(pc, skb, ie_FACILITY);
2499         l3dss1_std_ie_err(pc, ret);
2500           {
2501                 u_char *p;
2502                 if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
2503                         l3dss1_parse_facility(pc->st, pc, pc->callref, p);
2504         }
2505 }
2506
2507 static void
2508 l3dss1_suspend_req(struct l3_process *pc, u_char pr, void *arg)
2509 {
2510         struct sk_buff *skb;
2511         u_char tmp[32];
2512         u_char *p = tmp;
2513         u_char i, l;
2514         u_char *msg = pc->chan->setup.phone;
2515
2516         MsgHead(p, pc->callref, MT_SUSPEND);
2517         l = *msg++;
2518         if (l && (l <= 10)) {   /* Max length 10 octets */
2519                 *p++ = IE_CALL_ID;
2520                 *p++ = l;
2521                 for (i = 0; i < l; i++)
2522                         *p++ = *msg++;
2523         } else if (l) {
2524                 l3_debug(pc->st, "SUS wrong CALL_ID len %d", l);
2525                 return;
2526         }
2527         l = p - tmp;
2528         if (!(skb = l3_alloc_skb(l)))
2529                 return;
2530         memcpy(skb_put(skb, l), tmp, l);
2531         l3_msg(pc->st, DL_DATA | REQUEST, skb);
2532         newl3state(pc, 15);
2533         L3AddTimer(&pc->timer, T319, CC_T319);
2534 }
2535
2536 static void
2537 l3dss1_suspend_ack(struct l3_process *pc, u_char pr, void *arg)
2538 {
2539         struct sk_buff *skb = arg;
2540         int ret;
2541
2542         L3DelTimer(&pc->timer);
2543         newl3state(pc, 0);
2544         pc->para.cause = NO_CAUSE;
2545         pc->st->l3.l3l4(pc->st, CC_SUSPEND | CONFIRM, pc);
2546         /* We don't handle suspend_ack for IE errors now */
2547         if ((ret = check_infoelements(pc, skb, ie_SUSPEND_ACKNOWLEDGE)))
2548                 if (pc->debug & L3_DEB_WARN)
2549                         l3_debug(pc->st, "SUSPACK check ie(%d)",ret);
2550         dss1_release_l3_process(pc);
2551 }
2552
2553 static void
2554 l3dss1_suspend_rej(struct l3_process *pc, u_char pr, void *arg)
2555 {
2556         struct sk_buff *skb = arg;
2557         int ret;
2558
2559         if ((ret = l3dss1_get_cause(pc, skb))) {
2560                 if (pc->debug & L3_DEB_WARN)
2561                         l3_debug(pc->st, "SUSP_REJ get_cause ret(%d)",ret);
2562                 if (ret < 0)
2563                         pc->para.cause = 96;
2564                 else
2565                         pc->para.cause = 100;
2566                 l3dss1_status_send(pc, pr, NULL);
2567                 return;
2568         }
2569         ret = check_infoelements(pc, skb, ie_SUSPEND_REJECT);
2570         if (ERR_IE_COMPREHENSION == ret) {
2571                 l3dss1_std_ie_err(pc, ret);
2572                 return;
2573         }
2574         L3DelTimer(&pc->timer);
2575         pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc);
2576         newl3state(pc, 10);
2577         if (ret) /* STATUS for none mandatory IE errors after actions are taken */
2578                 l3dss1_std_ie_err(pc, ret);
2579 }
2580
2581 static void
2582 l3dss1_resume_req(struct l3_process *pc, u_char pr, void *arg)
2583 {
2584         struct sk_buff *skb;
2585         u_char tmp[32];
2586         u_char *p = tmp;
2587         u_char i, l;
2588         u_char *msg = pc->para.setup.phone;
2589
2590         MsgHead(p, pc->callref, MT_RESUME);
2591
2592         l = *msg++;
2593         if (l && (l <= 10)) {   /* Max length 10 octets */
2594                 *p++ = IE_CALL_ID;
2595                 *p++ = l;
2596                 for (i = 0; i < l; i++)
2597                         *p++ = *msg++;
2598         } else if (l) {
2599                 l3_debug(pc->st, "RES wrong CALL_ID len %d", l);
2600                 return;
2601         }
2602         l = p - tmp;
2603         if (!(skb = l3_alloc_skb(l)))
2604                 return;
2605         memcpy(skb_put(skb, l), tmp, l);
2606         l3_msg(pc->st, DL_DATA | REQUEST, skb);
2607         newl3state(pc, 17);
2608         L3AddTimer(&pc->timer, T318, CC_T318);
2609 }
2610
2611 static void
2612 l3dss1_resume_ack(struct l3_process *pc, u_char pr, void *arg)
2613 {
2614         struct sk_buff *skb = arg;
2615         int id, ret;
2616
2617         if ((id = l3dss1_get_channel_id(pc, skb)) > 0) {
2618                 if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
2619                         if (pc->debug & L3_DEB_WARN)
2620                                 l3_debug(pc->st, "resume ack with wrong chid %x", id);
2621                         pc->para.cause = 100;
2622                         l3dss1_status_send(pc, pr, NULL);
2623                         return;
2624                 }
2625                 pc->para.bchannel = id;
2626         } else if (1 == pc->state) {
2627                 if (pc->debug & L3_DEB_WARN)
2628                         l3_debug(pc->st, "resume ack without chid (ret %d)", id);
2629                 pc->para.cause = 96;
2630                 l3dss1_status_send(pc, pr, NULL);
2631                 return;
2632         }
2633         ret = check_infoelements(pc, skb, ie_RESUME_ACKNOWLEDGE);
2634         if (ERR_IE_COMPREHENSION == ret) {
2635                 l3dss1_std_ie_err(pc, ret);
2636                 return;
2637         }
2638         L3DelTimer(&pc->timer);
2639         pc->st->l3.l3l4(pc->st, CC_RESUME | CONFIRM, pc);
2640         newl3state(pc, 10);
2641         if (ret) /* STATUS for none mandatory IE errors after actions are taken */
2642                 l3dss1_std_ie_err(pc, ret);
2643 }
2644
2645 static void
2646 l3dss1_resume_rej(struct l3_process *pc, u_char pr, void *arg)
2647 {
2648         struct sk_buff *skb = arg;
2649         int ret;
2650
2651         if ((ret = l3dss1_get_cause(pc, skb))) {
2652                 if (pc->debug & L3_DEB_WARN)
2653                         l3_debug(pc->st, "RES_REJ get_cause ret(%d)",ret);
2654                 if (ret < 0)
2655                         pc->para.cause = 96;
2656                 else
2657                         pc->para.cause = 100;
2658                 l3dss1_status_send(pc, pr, NULL);
2659                 return;
2660         }
2661         ret = check_infoelements(pc, skb, ie_RESUME_REJECT);
2662         if (ERR_IE_COMPREHENSION == ret) {
2663                 l3dss1_std_ie_err(pc, ret);
2664                 return;
2665         }
2666         L3DelTimer(&pc->timer);
2667         pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc);
2668         newl3state(pc, 0);
2669         if (ret) /* STATUS for none mandatory IE errors after actions are taken */
2670                 l3dss1_std_ie_err(pc, ret);
2671         dss1_release_l3_process(pc);
2672 }
2673
2674 static void
2675 l3dss1_global_restart(struct l3_process *pc, u_char pr, void *arg)
2676 {
2677         u_char tmp[32];
2678         u_char *p;
2679         u_char ri, ch = 0, chan = 0;
2680         int l;
2681         struct sk_buff *skb = arg;
2682         struct l3_process *up;
2683
2684         newl3state(pc, 2);
2685         L3DelTimer(&pc->timer);
2686         p = skb->data;
2687         if ((p = findie(p, skb->len, IE_RESTART_IND, 0))) {
2688                 ri = p[2];
2689                 l3_debug(pc->st, "Restart %x", ri);
2690         } else {
2691                 l3_debug(pc->st, "Restart without restart IE");
2692                 ri = 0x86;
2693         }
2694         p = skb->data;
2695         if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) {
2696                 chan = p[2] & 3;
2697                 ch = p[2];
2698                 if (pc->st->l3.debug)
2699                         l3_debug(pc->st, "Restart for channel %d", chan);
2700         }
2701         newl3state(pc, 2);
2702         up = pc->st->l3.proc;
2703         while (up) {
2704                 if ((ri & 7) == 7)
2705                         up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up);
2706                 else if (up->para.bchannel == chan)
2707                         up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up);
2708                 up = up->next;
2709         }
2710         p = tmp;
2711         MsgHead(p, pc->callref, MT_RESTART_ACKNOWLEDGE);
2712         if (chan) {
2713                 *p++ = IE_CHANNEL_ID;
2714                 *p++ = 1;
2715                 *p++ = ch | 0x80;
2716         }
2717         *p++ = 0x79;            /* RESTART Ind */
2718         *p++ = 1;
2719         *p++ = ri;
2720         l = p - tmp;
2721         if (!(skb = l3_alloc_skb(l)))
2722                 return;
2723         memcpy(skb_put(skb, l), tmp, l);
2724         newl3state(pc, 0);
2725         l3_msg(pc->st, DL_DATA | REQUEST, skb);
2726 }
2727
2728 static void
2729 l3dss1_dl_reset(struct l3_process *pc, u_char pr, void *arg)
2730 {
2731         pc->para.cause = 0x29;          /* Temporary failure */
2732         pc->para.loc = 0;
2733         l3dss1_disconnect_req(pc, pr, NULL);
2734         pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2735 }
2736
2737 static void
2738 l3dss1_dl_release(struct l3_process *pc, u_char pr, void *arg)
2739 {
2740         newl3state(pc, 0);
2741         pc->para.cause = 0x1b;          /* Destination out of order */
2742         pc->para.loc = 0;
2743         pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2744         release_l3_process(pc);
2745 }
2746
2747 static void
2748 l3dss1_dl_reestablish(struct l3_process *pc, u_char pr, void *arg)
2749 {
2750         L3DelTimer(&pc->timer);
2751         L3AddTimer(&pc->timer, T309, CC_T309);
2752         l3_msg(pc->st, DL_ESTABLISH | REQUEST, NULL);
2753 }
2754
2755 static void
2756 l3dss1_dl_reest_status(struct l3_process *pc, u_char pr, void *arg)
2757 {
2758         L3DelTimer(&pc->timer);
2759
2760         pc->para.cause = 0x1F; /* normal, unspecified */
2761         l3dss1_status_send(pc, 0, NULL);
2762 }
2763
2764 /* *INDENT-OFF* */
2765 static struct stateentry downstatelist[] =
2766 {
2767         {SBIT(0),
2768          CC_SETUP | REQUEST, l3dss1_setup_req},
2769         {SBIT(0),
2770          CC_RESUME | REQUEST, l3dss1_resume_req},
2771         {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(25),
2772          CC_DISCONNECT | REQUEST, l3dss1_disconnect_req},
2773         {SBIT(12),
2774          CC_RELEASE | REQUEST, l3dss1_release_req},
2775         {ALL_STATES,
2776          CC_RESTART | REQUEST, l3dss1_restart},
2777         {SBIT(6) | SBIT(25),
2778          CC_IGNORE | REQUEST, l3dss1_reset},
2779         {SBIT(6) | SBIT(25),
2780          CC_REJECT | REQUEST, l3dss1_reject_req},
2781         {SBIT(6) | SBIT(25),
2782          CC_PROCEED_SEND | REQUEST, l3dss1_proceed_req},
2783         {SBIT(6),
2784          CC_MORE_INFO | REQUEST, l3dss1_setup_ack_req},
2785         {SBIT(25),
2786          CC_MORE_INFO | REQUEST, l3dss1_dummy},
2787         {SBIT(6) | SBIT(9) | SBIT(25),
2788          CC_ALERTING | REQUEST, l3dss1_alert_req},
2789         {SBIT(6) | SBIT(7) | SBIT(9) | SBIT(25),
2790          CC_SETUP | RESPONSE, l3dss1_setup_rsp},
2791         {SBIT(10),
2792          CC_SUSPEND | REQUEST, l3dss1_suspend_req},
2793         {SBIT(7) | SBIT(9) | SBIT(25),
2794          CC_REDIR | REQUEST, l3dss1_redir_req},
2795         {SBIT(6),
2796          CC_REDIR | REQUEST, l3dss1_redir_req_early},
2797         {SBIT(9) | SBIT(25),
2798          CC_DISCONNECT | REQUEST, l3dss1_disconnect_req},
2799         {SBIT(25),
2800          CC_T302, l3dss1_t302},
2801         {SBIT(1),
2802          CC_T303, l3dss1_t303},
2803         {SBIT(2),
2804          CC_T304, l3dss1_t304},
2805         {SBIT(3),
2806          CC_T310, l3dss1_t310},
2807         {SBIT(8),
2808          CC_T313, l3dss1_t313},
2809         {SBIT(11),
2810          CC_T305, l3dss1_t305},
2811         {SBIT(15),
2812          CC_T319, l3dss1_t319},
2813         {SBIT(17),
2814          CC_T318, l3dss1_t318},
2815         {SBIT(19),
2816          CC_T308_1, l3dss1_t308_1},
2817         {SBIT(19),
2818          CC_T308_2, l3dss1_t308_2},
2819         {SBIT(10),
2820          CC_T309, l3dss1_dl_release},
2821 };
2822
2823 #define DOWNSLLEN \
2824         (sizeof(downstatelist) / sizeof(struct stateentry))
2825
2826 static struct stateentry datastatelist[] =
2827 {
2828         {ALL_STATES,
2829          MT_STATUS_ENQUIRY, l3dss1_status_enq},
2830         {ALL_STATES,
2831          MT_FACILITY, l3dss1_facility},
2832         {SBIT(19),
2833          MT_STATUS, l3dss1_release_ind},
2834         {ALL_STATES,
2835          MT_STATUS, l3dss1_status},
2836         {SBIT(0),
2837          MT_SETUP, l3dss1_setup},
2838         {SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) |
2839          SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
2840          MT_SETUP, l3dss1_dummy},
2841         {SBIT(1) | SBIT(2),
2842          MT_CALL_PROCEEDING, l3dss1_call_proc},
2843         {SBIT(1),
2844          MT_SETUP_ACKNOWLEDGE, l3dss1_setup_ack},
2845         {SBIT(2) | SBIT(3),
2846          MT_ALERTING, l3dss1_alerting},
2847         {SBIT(2) | SBIT(3),
2848          MT_PROGRESS, l3dss1_progress},
2849         {SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) |
2850          SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
2851          MT_INFORMATION, l3dss1_information},
2852         {SBIT(10) | SBIT(11) | SBIT(15),
2853          MT_NOTIFY, l3dss1_notify},
2854         {SBIT(0) | SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(10) |
2855          SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
2856          MT_RELEASE_COMPLETE, l3dss1_release_cmpl},
2857         {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(25),
2858          MT_RELEASE, l3dss1_release},
2859         {SBIT(19),  MT_RELEASE, l3dss1_release_ind},
2860         {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(15) | SBIT(17) | SBIT(25),
2861          MT_DISCONNECT, l3dss1_disconnect},
2862         {SBIT(19),
2863          MT_DISCONNECT, l3dss1_dummy},
2864         {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4),
2865          MT_CONNECT, l3dss1_connect},
2866         {SBIT(8),
2867          MT_CONNECT_ACKNOWLEDGE, l3dss1_connect_ack},
2868         {SBIT(15),
2869          MT_SUSPEND_ACKNOWLEDGE, l3dss1_suspend_ack},
2870         {SBIT(15),
2871          MT_SUSPEND_REJECT, l3dss1_suspend_rej},
2872         {SBIT(17),
2873          MT_RESUME_ACKNOWLEDGE, l3dss1_resume_ack},
2874         {SBIT(17),
2875          MT_RESUME_REJECT, l3dss1_resume_rej},
2876 };
2877
2878 #define DATASLLEN \
2879         (sizeof(datastatelist) / sizeof(struct stateentry))
2880
2881 static struct stateentry globalmes_list[] =
2882 {
2883         {ALL_STATES,
2884          MT_STATUS, l3dss1_status},
2885         {SBIT(0),
2886          MT_RESTART, l3dss1_global_restart},
2887 /*      {SBIT(1),
2888          MT_RESTART_ACKNOWLEDGE, l3dss1_restart_ack},
2889 */
2890 };
2891 #define GLOBALM_LEN \
2892         (sizeof(globalmes_list) / sizeof(struct stateentry))
2893
2894 static struct stateentry manstatelist[] =
2895 {
2896         {SBIT(2),
2897          DL_ESTABLISH | INDICATION, l3dss1_dl_reset},
2898         {SBIT(10),
2899          DL_ESTABLISH | CONFIRM, l3dss1_dl_reest_status},
2900         {SBIT(10),
2901          DL_RELEASE | INDICATION, l3dss1_dl_reestablish},
2902         {ALL_STATES,
2903          DL_RELEASE | INDICATION, l3dss1_dl_release},
2904 };
2905
2906 #define MANSLLEN \
2907         (sizeof(manstatelist) / sizeof(struct stateentry))
2908 /* *INDENT-ON* */
2909
2910
2911 static void
2912 global_handler(struct PStack *st, int mt, struct sk_buff *skb)
2913 {
2914         u_char tmp[16];
2915         u_char *p = tmp;
2916         int l;
2917         int i;
2918         struct l3_process *proc = st->l3.global;
2919
2920         proc->callref = skb->data[2]; /* cr flag */
2921         for (i = 0; i < GLOBALM_LEN; i++)
2922                 if ((mt == globalmes_list[i].primitive) &&
2923                     ((1 << proc->state) & globalmes_list[i].state))
2924                         break;
2925         if (i == GLOBALM_LEN) {
2926                 if (st->l3.debug & L3_DEB_STATE) {
2927                         l3_debug(st, "dss1 global state %d mt %x unhandled",
2928                                 proc->state, mt);
2929                 }
2930                 MsgHead(p, proc->callref, MT_STATUS);
2931                 *p++ = IE_CAUSE;
2932                 *p++ = 0x2;
2933                 *p++ = 0x80;
2934                 *p++ = 81 |0x80;        /* invalid cr */
2935                 *p++ = 0x14;            /* CallState */
2936                 *p++ = 0x1;
2937                 *p++ = proc->state & 0x3f;
2938                 l = p - tmp;
2939                 if (!(skb = l3_alloc_skb(l)))
2940                         return;
2941                 memcpy(skb_put(skb, l), tmp, l);
2942                 l3_msg(proc->st, DL_DATA | REQUEST, skb);
2943         } else {
2944                 if (st->l3.debug & L3_DEB_STATE) {
2945                         l3_debug(st, "dss1 global %d mt %x",
2946                                 proc->state, mt);
2947                 }
2948                 globalmes_list[i].rout(proc, mt, skb);
2949         }
2950 }
2951
2952 static void
2953 dss1up(struct PStack *st, int pr, void *arg)
2954 {
2955         int i, mt, cr, cause, callState;
2956         char *ptr;
2957         u_char *p;
2958         struct sk_buff *skb = arg;
2959         struct l3_process *proc;
2960
2961         switch (pr) {
2962                 case (DL_DATA | INDICATION):
2963                 case (DL_UNIT_DATA | INDICATION):
2964                         break;
2965                 case (DL_ESTABLISH | CONFIRM):
2966                 case (DL_ESTABLISH | INDICATION):
2967                 case (DL_RELEASE | INDICATION):
2968                 case (DL_RELEASE | CONFIRM):
2969                         l3_msg(st, pr, arg);
2970                         return;
2971                         break;
2972                 default:
2973                         printk(KERN_ERR "HiSax dss1up unknown pr=%04x\n", pr);
2974                         return;
2975         }
2976         if (skb->len < 3) {
2977                 l3_debug(st, "dss1up frame too short(%d)", skb->len);
2978                 dev_kfree_skb(skb);
2979                 return;
2980         }
2981
2982         if (skb->data[0] != PROTO_DIS_EURO) {
2983                 if (st->l3.debug & L3_DEB_PROTERR) {
2984                         l3_debug(st, "dss1up%sunexpected discriminator %x message len %d",
2985                                  (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
2986                                  skb->data[0], skb->len);
2987                 }
2988                 dev_kfree_skb(skb);
2989                 return;
2990         }
2991         cr = getcallref(skb->data);
2992         if (skb->len < ((skb->data[1] & 0x0f) + 3)) {
2993                 l3_debug(st, "dss1up frame too short(%d)", skb->len);
2994                 dev_kfree_skb(skb);
2995                 return;
2996         }
2997         mt = skb->data[skb->data[1] + 2];
2998         if (st->l3.debug & L3_DEB_STATE)
2999                 l3_debug(st, "dss1up cr %d", cr);
3000         if (cr == -2) {  /* wrong Callref */
3001                 if (st->l3.debug & L3_DEB_WARN)
3002                         l3_debug(st, "dss1up wrong Callref");
3003                 dev_kfree_skb(skb);
3004                 return;
3005         } else if (cr == -1) {  /* Dummy Callref */
3006                 if (mt == MT_FACILITY)
3007                         if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
3008                                 l3dss1_parse_facility(st, NULL,
3009                                         (pr == (DL_DATA | INDICATION)) ? -1 : -2, p);
3010                                 dev_kfree_skb(skb);
3011                                 return;
3012                         }
3013                 if (st->l3.debug & L3_DEB_WARN)
3014                         l3_debug(st, "dss1up dummy Callref (no facility msg or ie)");
3015                 dev_kfree_skb(skb);
3016                 return;
3017         } else if ((((skb->data[1] & 0x0f) == 1) && (0==(cr & 0x7f))) ||
3018                 (((skb->data[1] & 0x0f) == 2) && (0==(cr & 0x7fff)))) { /* Global CallRef */
3019                 if (st->l3.debug & L3_DEB_STATE)
3020                         l3_debug(st, "dss1up Global CallRef");
3021                 global_handler(st, mt, skb);
3022                 dev_kfree_skb(skb);
3023                 return;
3024         } else if (!(proc = getl3proc(st, cr))) {
3025                 /* No transaction process exist, that means no call with
3026                  * this callreference is active
3027                  */
3028                 if (mt == MT_SETUP) {
3029                         /* Setup creates a new transaction process */
3030                         if (skb->data[2] & 0x80) {
3031                                 /* Setup with wrong CREF flag */
3032                                 if (st->l3.debug & L3_DEB_STATE)
3033                                         l3_debug(st, "dss1up wrong CRef flag");
3034                                 dev_kfree_skb(skb);
3035                                 return;
3036                         }
3037                         if (!(proc = dss1_new_l3_process(st, cr))) {
3038                                 /* May be to answer with RELEASE_COMPLETE and
3039                                  * CAUSE 0x2f "Resource unavailable", but this
3040                                  * need a new_l3_process too ... arghh
3041                                  */
3042                                 dev_kfree_skb(skb);
3043                                 return;
3044                         }
3045                 } else if (mt == MT_STATUS) {
3046                         cause = 0;
3047                         if ((ptr = findie(skb->data, skb->len, IE_CAUSE, 0)) != NULL) {
3048                                 ptr++;
3049                                 if (*ptr++ == 2)
3050                                         ptr++;
3051                                 cause = *ptr & 0x7f;
3052                         }
3053                         callState = 0;
3054                         if ((ptr = findie(skb->data, skb->len, IE_CALL_STATE, 0)) != NULL) {
3055                                 ptr++;
3056                                 if (*ptr++ == 2)
3057                                         ptr++;
3058                                 callState = *ptr;
3059                         }
3060                         /* ETS 300-104 part 2.4.1
3061                          * if setup has not been made and a message type
3062                          * MT_STATUS is received with call state == 0,
3063                          * we must send nothing
3064                          */
3065                         if (callState != 0) {
3066                                 /* ETS 300-104 part 2.4.2
3067                                  * if setup has not been made and a message type
3068                                  * MT_STATUS is received with call state != 0,
3069                                  * we must send MT_RELEASE_COMPLETE cause 101
3070                                  */
3071                                 if ((proc = dss1_new_l3_process(st, cr))) {
3072                                         proc->para.cause = 101;
3073                                         l3dss1_msg_without_setup(proc, 0, NULL);
3074                                 }
3075                         }
3076                         dev_kfree_skb(skb);
3077                         return;
3078                 } else if (mt == MT_RELEASE_COMPLETE) {
3079                         dev_kfree_skb(skb);
3080                         return;
3081                 } else {
3082                         /* ETS 300-104 part 2
3083                          * if setup has not been made and a message type
3084                          * (except MT_SETUP and RELEASE_COMPLETE) is received,
3085                          * we must send MT_RELEASE_COMPLETE cause 81 */
3086                         dev_kfree_skb(skb);
3087                         if ((proc = dss1_new_l3_process(st, cr))) {
3088                                 proc->para.cause = 81;
3089                                 l3dss1_msg_without_setup(proc, 0, NULL);
3090                         }
3091                         return;
3092                 }
3093         }
3094         if (l3dss1_check_messagetype_validity(proc, mt, skb)) {
3095                 dev_kfree_skb(skb);
3096                 return;
3097         }
3098         if ((p = findie(skb->data, skb->len, IE_DISPLAY, 0)) != NULL)
3099           l3dss1_deliver_display(proc, pr, p); /* Display IE included */
3100         for (i = 0; i < DATASLLEN; i++)
3101                 if ((mt == datastatelist[i].primitive) &&
3102                     ((1 << proc->state) & datastatelist[i].state))
3103                         break;
3104         if (i == DATASLLEN) {
3105                 if (st->l3.debug & L3_DEB_STATE) {
3106                         l3_debug(st, "dss1up%sstate %d mt %#x unhandled",
3107                                 (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
3108                                 proc->state, mt);
3109                 }
3110                 if ((MT_RELEASE_COMPLETE != mt) && (MT_RELEASE != mt)) {
3111                         proc->para.cause = 101;
3112                         l3dss1_status_send(proc, pr, skb);
3113                 }
3114         } else {
3115                 if (st->l3.debug & L3_DEB_STATE) {
3116                         l3_debug(st, "dss1up%sstate %d mt %x",
3117                                 (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
3118                                 proc->state, mt);
3119                 }
3120                 datastatelist[i].rout(proc, pr, skb);
3121         }
3122         dev_kfree_skb(skb);
3123         return;
3124 }
3125
3126 static void
3127 dss1down(struct PStack *st, int pr, void *arg)
3128 {
3129         int i, cr;
3130         struct l3_process *proc;
3131         struct Channel *chan;
3132
3133         if ((DL_ESTABLISH | REQUEST) == pr) {
3134                 l3_msg(st, pr, NULL);
3135                 return;
3136         } else if (((CC_SETUP | REQUEST) == pr) || ((CC_RESUME | REQUEST) == pr)) {
3137                 chan = arg;
3138                 cr = newcallref();
3139                 cr |= 0x80;
3140                 if ((proc = dss1_new_l3_process(st, cr))) {
3141                         proc->chan = chan;
3142                         chan->proc = proc;
3143                         memcpy(&proc->para.setup, &chan->setup, sizeof(setup_parm));
3144                         proc->callref = cr;
3145                 }
3146         } else {
3147                 proc = arg;
3148         }
3149         if (!proc) {
3150                 printk(KERN_ERR "HiSax dss1down without proc pr=%04x\n", pr);
3151                 return;
3152         }
3153
3154         if ( pr == (CC_TDSS1_IO | REQUEST)) {
3155                 l3dss1_io_timer(proc); /* timer expires */
3156                 return;
3157         }
3158
3159         for (i = 0; i < DOWNSLLEN; i++)
3160                 if ((pr == downstatelist[i].primitive) &&
3161                     ((1 << proc->state) & downstatelist[i].state))
3162                         break;
3163         if (i == DOWNSLLEN) {
3164                 if (st->l3.debug & L3_DEB_STATE) {
3165                         l3_debug(st, "dss1down state %d prim %#x unhandled",
3166                                 proc->state, pr);
3167                 }
3168         } else {
3169                 if (st->l3.debug & L3_DEB_STATE) {
3170                         l3_debug(st, "dss1down state %d prim %#x",
3171                                 proc->state, pr);
3172                 }
3173                 downstatelist[i].rout(proc, pr, arg);
3174         }
3175 }
3176
3177 static void
3178 dss1man(struct PStack *st, int pr, void *arg)
3179 {
3180         int i;
3181         struct l3_process *proc = arg;
3182
3183         if (!proc) {
3184                 printk(KERN_ERR "HiSax dss1man without proc pr=%04x\n", pr);
3185                 return;
3186         }
3187         for (i = 0; i < MANSLLEN; i++)
3188                 if ((pr == manstatelist[i].primitive) &&
3189                     ((1 << proc->state) & manstatelist[i].state))
3190                         break;
3191         if (i == MANSLLEN) {
3192                 if (st->l3.debug & L3_DEB_STATE) {
3193                         l3_debug(st, "cr %d dss1man state %d prim %#x unhandled",
3194                                 proc->callref & 0x7f, proc->state, pr);
3195                 }
3196         } else {
3197                 if (st->l3.debug & L3_DEB_STATE) {
3198                         l3_debug(st, "cr %d dss1man state %d prim %#x",
3199                                 proc->callref & 0x7f, proc->state, pr);
3200                 }
3201                 manstatelist[i].rout(proc, pr, arg);
3202         }
3203 }
3204
3205 void
3206 setstack_dss1(struct PStack *st)
3207 {
3208         char tmp[64];
3209         int i;
3210
3211         st->lli.l4l3 = dss1down;
3212         st->lli.l4l3_proto = l3dss1_cmd_global;
3213         st->l2.l2l3 = dss1up;
3214         st->l3.l3ml3 = dss1man;
3215         st->l3.N303 = 1;
3216         st->prot.dss1.last_invoke_id = 0;
3217         st->prot.dss1.invoke_used[0] = 1; /* Bit 0 must always be set to 1 */
3218         i = 1;
3219         while (i < 32)
3220                 st->prot.dss1.invoke_used[i++] = 0;
3221
3222         if (!(st->l3.global = kmalloc(sizeof(struct l3_process), GFP_ATOMIC))) {
3223                 printk(KERN_ERR "HiSax can't get memory for dss1 global CR\n");
3224         } else {
3225                 st->l3.global->state = 0;
3226                 st->l3.global->callref = 0;
3227                 st->l3.global->next = NULL;
3228                 st->l3.global->debug = L3_DEB_WARN;
3229                 st->l3.global->st = st;
3230                 st->l3.global->N303 = 1;
3231                 st->l3.global->prot.dss1.invoke_id = 0;
3232
3233                 L3InitTimer(st->l3.global, &st->l3.global->timer);
3234         }
3235         strcpy(tmp, dss1_revision);
3236         printk(KERN_INFO "HiSax: DSS1 Rev. %s\n", HiSax_getrev(tmp));
3237 }