sys/net/i4b/layer4/i4b_l4mgmt.c

   1 /*
   2  * Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  *---------------------------------------------------------------------------
  26  *
  27  *      i4b_l4mgmt.c - layer 4 calldescriptor management utilites
  28  *      -----------------------------------------------------------
  29  *
  30  *      $Id: i4b_l4mgmt.c,v 1.34 2000/09/01 14:11:51 hm Exp $
  31  *
  32  * $FreeBSD: src/sys/i4b/layer4/i4b_l4mgmt.c,v 1.6.2.2 2001/08/10 14:08:43 obrien Exp $
  33  *
  34  *      last edit-date: [Fri Oct 13 15:58:34 2000]
  35  *
  36  *---------------------------------------------------------------------------*/
  37
  38 #include "i4b.h"
  39
  40 #if NI4B > 0
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45
  46 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
  47 #include <sys/callout.h>
  48 #endif
  49
  50 #ifdef __FreeBSD__
  51 #include <machine/i4b_debug.h>
  52 #include <machine/i4b_ioctl.h>
  53 #else
  54 #include <i4b/i4b_debug.h>
  55 #include <i4b/i4b_ioctl.h>
  56 #endif
  57
  58 #include <i4b/include/i4b_l3l4.h>
  59 #include <i4b/include/i4b_global.h>
  60
  61 #include <i4b/layer4/i4b_l4.h>
  62
  63 call_desc_t call_desc[N_CALL_DESC];     /* call descriptor array */
  64
  65 static unsigned int get_cdid(void);
  66
  67 int nctrl;                              /* number of attached controllers */
  68
  69 #if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
  70 void i4b_init_callout(call_desc_t *);
  71 #endif
  72
  73 /*---------------------------------------------------------------------------*
  74  *      return a new unique call descriptor id
  75  *      --------------------------------------
  76  *      returns a new calldescriptor id which is used to uniquely identyfy
  77  *      a single call in the communication between kernel and userland.
  78  *      this cdid is then used to associate a calldescriptor with an id.
  79  *---------------------------------------------------------------------------*/
  80 static unsigned int
  81 get_cdid(void)
  82 {
  83         static unsigned int cdid_count = 0;
  84         int i;
  85         int x;
  86
  87         x = SPLI4B();
  88
  89         /* get next id */
  90
  91         cdid_count++;
  92
  93 again:
  94         if(cdid_count == CDID_UNUSED)           /* zero is invalid */
  95                 cdid_count++;
  96         else if(cdid_count > CDID_MAX)          /* wraparound ? */
  97                 cdid_count = 1;
  98
  99         /* check if id already in use */
 100
 101         for(i=0; i < N_CALL_DESC; i++)
 102         {
 103                 if(call_desc[i].cdid == cdid_count)
 104                 {
 105                         cdid_count++;
 106                         goto again;
 107                 }
 108         }
 109
 110         splx(x);
 111
 112         return(cdid_count);
 113 }
 114
 115 /*---------------------------------------------------------------------------*
 116  *      reserve a calldescriptor for later usage
 117  *      ----------------------------------------
 118  *      searches the calldescriptor array until an unused
 119  *      descriptor is found, gets a new calldescriptor id
 120  *      and reserves it by putting the id into the cdid field.
 121  *      returns pointer to the calldescriptor.
 122  *---------------------------------------------------------------------------*/
 123 call_desc_t *
 124 reserve_cd(void)
 125 {
 126         call_desc_t *cd;
 127         int x;
 128         int i;
 129
 130         x = SPLI4B();
 131
 132         cd = NULL;
 133
 134         for(i=0; i < N_CALL_DESC; i++)
 135         {
 136                 if(call_desc[i].cdid == CDID_UNUSED)
 137                 {
 138                         bzero(&call_desc[i], sizeof(call_desc_t)); /* clear it */
 139                         call_desc[i].cdid = get_cdid(); /* fill in new cdid */
 140                         cd = &(call_desc[i]);   /* get pointer to descriptor */
 141                         NDBGL4(L4_MSG, "found free cd - index=%d cdid=%u",
 142                                  i, call_desc[i].cdid);
 143                         break;
 144                 }
 145         }
 146
 147         splx(x);
 148
 149         if(cd == NULL)
 150                 panic("reserve_cd: no free call descriptor available!");
 151
 152 #if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
 153         i4b_init_callout(cd);
 154 #endif
 155
 156         return(cd);
 157 }
 158
 159 /*---------------------------------------------------------------------------*
 160  *      free a calldescriptor
 161  *      ---------------------
 162  *      free a unused calldescriptor by giving address of calldescriptor
 163  *      and writing a 0 into the cdid field marking it as unused.
 164  *---------------------------------------------------------------------------*/
 165 void
 166 freecd_by_cd(call_desc_t *cd)
 167 {
 168         int i;
 169         int x = SPLI4B();
 170
 171         for(i=0; i < N_CALL_DESC; i++)
 172         {
 173                 if( (call_desc[i].cdid != CDID_UNUSED) &&
 174                     (&(call_desc[i]) == cd) )
 175                 {
 176                         NDBGL4(L4_MSG, "releasing cd - index=%d cdid=%u cr=%d",
 177                                 i, call_desc[i].cdid, cd->cr);
 178                         call_desc[i].cdid = CDID_UNUSED;
 179                         break;
 180                 }
 181         }
 182
 183         if(i == N_CALL_DESC)
 184                 panic("freecd_by_cd: ERROR, cd not found, cr = %d\n", cd->cr);
 185
 186         splx(x);
 187 }
 188
 189 /*---------------------------------------------------------------------------*
 190  *      return pointer to calldescriptor by giving the calldescriptor id
 191  *      ----------------------------------------------------------------
 192  *      lookup a calldescriptor in the calldescriptor array by looking
 193  *      at the cdid field. return pointer to calldescriptor if found,
 194  *      else return NULL if not found.
 195  *---------------------------------------------------------------------------*/
 196 call_desc_t *
 197 cd_by_cdid(unsigned int cdid)
 198 {
 199         int i;
 200
 201         for(i=0; i < N_CALL_DESC; i++)
 202         {
 203                 if(call_desc[i].cdid == cdid)
 204                 {
 205                         NDBGL4(L4_MSG, "found cdid - index=%d cdid=%u cr=%d",
 206                                         i, call_desc[i].cdid, call_desc[i].cr);
 207 #if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
 208                         i4b_init_callout(&call_desc[i]);
 209 #endif
 210                         return(&(call_desc[i]));
 211                 }
 212         }
 213         return(NULL);
 214 }
 215
 216 /*---------------------------------------------------------------------------*
 217  *      search calldescriptor
 218  *      ---------------------
 219  *      This routine searches for the calldescriptor for a passive controller
 220  *      given by unit number, callreference and callreference flag.
 221  *      It returns a pointer to the calldescriptor if found, else a NULL.
 222  *---------------------------------------------------------------------------*/
 223 call_desc_t *
 224 cd_by_unitcr(int unit, int cr, int crf)
 225 {
 226         int i;
 227
 228         for(i=0; i < N_CALL_DESC; i++)
 229         {
 230           if((call_desc[i].cdid != CDID_UNUSED)                                       &&
 231              (ctrl_desc[call_desc[i].controller].ctrl_type == CTRL_PASSIVE) &&
 232              (ctrl_desc[call_desc[i].controller].unit == unit)              &&
 233              (call_desc[i].cr == cr)                                        &&
 234              (call_desc[i].crflag == crf) )
 235           {
 236             NDBGL4(L4_MSG, "found cd, index=%d cdid=%u cr=%d",
 237                         i, call_desc[i].cdid, call_desc[i].cr);
 238 #if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
 239             i4b_init_callout(&call_desc[i]);
 240 #endif
 241             return(&(call_desc[i]));
 242           }
 243         }
 244         return(NULL);
 245 }
 246
 247 /*---------------------------------------------------------------------------*
 248  *      generate 7 bit "random" number used for outgoing Call Reference
 249  *---------------------------------------------------------------------------*/
 250 unsigned char
 251 get_rand_cr(int unit)
 252 {
 253         register int i, j;
 254         static u_char val, retval;
 255         static int called = 42;
 256
 257         val += ++called;
 258
 259         for(i=0; i < 50 ; i++, val++)
 260         {
 261                 int found = 1;
 262
 263 #if defined(__FreeBSD__)
 264
 265 #ifdef RANDOMDEV
 266                 read_random((char *)&val, sizeof(val));
 267 #else
 268                 val = (u_char)random();
 269 #endif /* RANDOMDEV */
 270
 271 #else
 272                 val |= unit+i;
 273                 val <<= i;
 274                 val ^= (time.tv_sec >> 8) ^ time.tv_usec;
 275                 val <<= i;
 276                 val ^= time.tv_sec ^ (time.tv_usec >> 8);
 277 #endif
 278
 279                 retval = val & 0x7f;
 280
 281                 if(retval == 0 || retval == 0x7f)
 282                         continue;
 283
 284                 for(j=0; j < N_CALL_DESC; j++)
 285                 {
 286                         if( (call_desc[j].cdid != CDID_UNUSED) &&
 287                             (call_desc[j].cr == retval) )
 288                         {
 289                                 found = 0;
 290                                 break;
 291                         }
 292                 }
 293
 294                 if(found)
 295                         return(retval);
 296         }
 297         return(0);      /* XXX */
 298 }
 299
 300 /*---------------------------------------------------------------------------*
 301  *      initialize the callout handles for FreeBSD
 302  *---------------------------------------------------------------------------*/
 303 #if (defined(__NetBSD__) && __NetBSD_Version__ >= 104230000) || defined(__FreeBSD__)
 304 void
 305 i4b_init_callout(call_desc_t *cd)
 306 {
 307         if(cd->callouts_inited == 0)
 308         {
 309 #ifdef __FreeBSD__
 310                 callout_handle_init(&cd->idle_timeout_handle);
 311                 callout_handle_init(&cd->T303_callout);
 312                 callout_handle_init(&cd->T305_callout);
 313                 callout_handle_init(&cd->T308_callout);
 314                 callout_handle_init(&cd->T309_callout);
 315                 callout_handle_init(&cd->T310_callout);
 316                 callout_handle_init(&cd->T313_callout);
 317                 callout_handle_init(&cd->T400_callout);
 318 #else
 319                 callout_init(&cd->idle_timeout_handle);
 320                 callout_init(&cd->T303_callout);
 321                 callout_init(&cd->T305_callout);
 322                 callout_init(&cd->T308_callout);
 323                 callout_init(&cd->T309_callout);
 324                 callout_init(&cd->T310_callout);
 325                 callout_init(&cd->T313_callout);
 326                 callout_init(&cd->T400_callout);
 327 #endif
 328                 cd->callouts_inited = 1;
 329         }
 330 }
 331 #endif
 332
 333 /*---------------------------------------------------------------------------*
 334  *      daemon is attached
 335  *---------------------------------------------------------------------------*/
 336 void
 337 i4b_l4_daemon_attached(void)
 338 {
 339         int i;
 340
 341         int x = SPLI4B();
 342
 343         for(i=0; i < nctrl; i++)
 344         {
 345 /*XXX*/         if(ctrl_desc[i].ctrl_type == CTRL_PASSIVE)
 346                 {
 347                         NDBGL4(L4_MSG, "CMR_DOPEN sent to unit %d", ctrl_desc[i].unit);
 348                         (*ctrl_desc[i].N_MGMT_COMMAND)(ctrl_desc[i].unit, CMR_DOPEN, 0);
 349                 }
 350         }
 351         splx(x);
 352 }
 353
 354 /*---------------------------------------------------------------------------*
 355  *      daemon is detached
 356  *---------------------------------------------------------------------------*/
 357 void
 358 i4b_l4_daemon_detached(void)
 359 {
 360         int i;
 361
 362         int x = SPLI4B();
 363
 364         for(i=0; i < nctrl; i++)
 365         {
 366 /*XXX*/         if(ctrl_desc[i].ctrl_type == CTRL_PASSIVE)
 367                 {
 368                         NDBGL4(L4_MSG, "CMR_DCLOSE sent to unit %d", ctrl_desc[i].unit);
 369                         (*ctrl_desc[i].N_MGMT_COMMAND)(ctrl_desc[i].unit, CMR_DCLOSE, 0);
 370                 }
 371         }
 372         splx(x);
 373 }
 374
 375 #ifdef I4B_CD_DEBUG_PRINT
 376
 377 extern char *print_l3state(call_desc_t *cd);
 378
 379 void i4b_print_cdp(call_desc_t *cdp);
 380 void i4b_print_cdx(int index);
 381 void i4b_print_cda(void);
 382 void i4b_print_cdaa(void);
 383
 384 /*---------------------------------------------------------------------------*
 385  *      print a call descriptor by cd-pointer
 386  *---------------------------------------------------------------------------*/
 387 void
 388 i4b_print_cdp(call_desc_t *cdp)
 389 {
 390         if((cdp > &(call_desc[N_CALL_DESC])) || (cdp < &(call_desc[0])))
 391         {
 392                 printf("i4b_print_cd: cdp out of range!\n");
 393                 return;
 394         }
 395
 396         printf("i4b_print_cd: printing call descriptor %d at 0x%lx:\n", cdp - (&(call_desc[0])), (unsigned long)cdp);
 397
 398         printf("         cdid = %d\n", cdp->cdid);
 399         printf("   controller = %d (u=%d, dl=%d, b1=%d, b2=%d)\n",
 400                         cdp->controller,
 401                         ctrl_desc[cdp->controller].unit,
 402                         ctrl_desc[cdp->controller].dl_est,
 403                         ctrl_desc[cdp->controller].bch_state[CHAN_B1],
 404                         ctrl_desc[cdp->controller].bch_state[CHAN_B2]);
 405         printf("           cr = 0x%02x\n", cdp->cr);
 406         printf("       crflag = %d\n", cdp->crflag);
 407         printf("    channelid = %d\n", cdp->channelid);
 408         printf("        bprot = %d\n", cdp->bprot);
 409         printf("       driver = %d\n", cdp->driver);
 410         printf("  driver_unit = %d\n", cdp->driver_unit);
 411         printf("   call_state = %d\n", cdp->call_state);
 412         printf("    Q931state = %s\n", print_l3state(cdp));
 413         printf("        event = %d\n", cdp->event);
 414         printf("     response = %d\n", cdp->response);
 415         printf("         T303 = %d\n", cdp->T303);
 416         printf("T303_first_to = %d\n", cdp->T303_first_to);
 417         printf("         T305 = %d\n", cdp->T305);
 418         printf("         T308 = %d\n", cdp->T308);
 419         printf("T308_first_to = %d\n", cdp->T308_first_to);
 420         printf("         T309 = %d\n", cdp->T309);
 421         printf("         T310 = %d\n", cdp->T310);
 422         printf("         T313 = %d\n", cdp->T313);
 423         printf("         T400 = %d\n", cdp->T400);
 424         printf("          dir = %s\n", cdp->dir == DIR_OUTGOING ? "out" : "in");
 425 }
 426
 427 /*---------------------------------------------------------------------------*
 428  *      print a call descriptor by index
 429  *---------------------------------------------------------------------------*/
 430 void
 431 i4b_print_cdx(int index)
 432 {
 433         if(index >= N_CALL_DESC)
 434         {
 435                 printf("i4b_print_cdx: index %d >= N_CALL_DESC %d\n", index, N_CALL_DESC);
 436                 return;
 437         }
 438         i4b_print_cdp(&(call_desc[index]));
 439 }
 440
 441 /*---------------------------------------------------------------------------*
 442  *      print all call descriptors
 443  *---------------------------------------------------------------------------*/
 444 void
 445 i4b_print_cda(void)
 446 {
 447         int i;
 448
 449         for(i=0; i < N_CALL_DESC; i++)
 450         {
 451                 i4b_print_cdp(&(call_desc[i]));
 452         }
 453 }
 454
 455 /*---------------------------------------------------------------------------*
 456  *      print all active call descriptors
 457  *---------------------------------------------------------------------------*/
 458 void
 459 i4b_print_cdaa(void)
 460 {
 461         int i;
 462
 463         for(i=0; i < N_CALL_DESC; i++)
 464         {
 465                 if(call_desc[i].cdid != CDID_UNUSED)
 466                 {
 467                         i4b_print_cdp(&(call_desc[i]));
 468                 }
 469         }
 470 }
 471
 472 #endif /* I4B_CD_DEBUG_PRINT */
 473
 474 #endif /* NI4BQ931 > 0 */