root/drivers/isdn/mISDN/tei.c

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DEFINITIONS

This source file includes following definitions.
  1. da_debug
  2. da_activate
  3. da_deactivate_ind
  4. da_deactivate
  5. da_ui
  6. da_timer
  7. tei_debug
  8. get_free_id
  9. get_free_tei
  10. teiup_create
  11. new_id
  12. do_send
  13. do_ack
  14. mgr_send_down
  15. dl_unit_data
  16. random_ri
  17. findtei
  18. put_tei_msg
  19. tei_id_request
  20. tei_id_assign
  21. tei_id_test_dup
  22. tei_id_denied
  23. tei_id_chk_req
  24. tei_id_remove
  25. tei_id_verify
  26. tei_id_req_tout
  27. tei_id_ver_tout
  28. tei_l2remove
  29. tei_assign_req
  30. tei_id_chk_req_net
  31. tei_id_chk_resp
  32. tei_id_verify_net
  33. tei_id_ver_tout_net
  34. tei_ph_data_ind
  35. create_new_tei
  36. new_tei_req
  37. ph_data_ind
  38. l2_tei
  39. TEIrelease
  40. create_teimgr
  41. mgr_send
  42. free_teimanager
  43. ctrl_teimanager
  44. check_data
  45. delete_teimanager
  46. mgr_ctrl
  47. mgr_bcast
  48. mgr_bcast_ctrl
  49. create_teimanager
  50. TEIInit
  51. TEIFree

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  * Author       Karsten Keil <kkeil@novell.com>
   5  *
   6  * Copyright 2008  by Karsten Keil <kkeil@novell.com>
   7  */
   8 #include "layer2.h"
   9 #include <linux/random.h>
  10 #include <linux/slab.h>
  11 #include "core.h"
  12 
  13 #define ID_REQUEST      1
  14 #define ID_ASSIGNED     2
  15 #define ID_DENIED       3
  16 #define ID_CHK_REQ      4
  17 #define ID_CHK_RES      5
  18 #define ID_REMOVE       6
  19 #define ID_VERIFY       7
  20 
  21 #define TEI_ENTITY_ID   0xf
  22 
  23 #define MGR_PH_ACTIVE   16
  24 #define MGR_PH_NOTREADY 17
  25 
  26 #define DATIMER_VAL     10000
  27 
  28 static  u_int   *debug;
  29 
  30 static struct Fsm deactfsm = {NULL, 0, 0, NULL, NULL};
  31 static struct Fsm teifsmu = {NULL, 0, 0, NULL, NULL};
  32 static struct Fsm teifsmn = {NULL, 0, 0, NULL, NULL};
  33 
  34 enum {
  35         ST_L1_DEACT,
  36         ST_L1_DEACT_PENDING,
  37         ST_L1_ACTIV,
  38 };
  39 #define DEACT_STATE_COUNT (ST_L1_ACTIV + 1)
  40 
  41 static char *strDeactState[] =
  42 {
  43         "ST_L1_DEACT",
  44         "ST_L1_DEACT_PENDING",
  45         "ST_L1_ACTIV",
  46 };
  47 
  48 enum {
  49         EV_ACTIVATE,
  50         EV_ACTIVATE_IND,
  51         EV_DEACTIVATE,
  52         EV_DEACTIVATE_IND,
  53         EV_UI,
  54         EV_DATIMER,
  55 };
  56 
  57 #define DEACT_EVENT_COUNT (EV_DATIMER + 1)
  58 
  59 static char *strDeactEvent[] =
  60 {
  61         "EV_ACTIVATE",
  62         "EV_ACTIVATE_IND",
  63         "EV_DEACTIVATE",
  64         "EV_DEACTIVATE_IND",
  65         "EV_UI",
  66         "EV_DATIMER",
  67 };
  68 
  69 static void
  70 da_debug(struct FsmInst *fi, char *fmt, ...)
  71 {
  72         struct manager  *mgr = fi->userdata;
  73         struct va_format vaf;
  74         va_list va;
  75 
  76         if (!(*debug & DEBUG_L2_TEIFSM))
  77                 return;
  78 
  79         va_start(va, fmt);
  80 
  81         vaf.fmt = fmt;
  82         vaf.va = &va;
  83 
  84         printk(KERN_DEBUG "mgr(%d): %pV\n", mgr->ch.st->dev->id, &vaf);
  85 
  86         va_end(va);
  87 }
  88 
  89 static void
  90 da_activate(struct FsmInst *fi, int event, void *arg)
  91 {
  92         struct manager  *mgr = fi->userdata;
  93 
  94         if (fi->state == ST_L1_DEACT_PENDING)
  95                 mISDN_FsmDelTimer(&mgr->datimer, 1);
  96         mISDN_FsmChangeState(fi, ST_L1_ACTIV);
  97 }
  98 
  99 static void
 100 da_deactivate_ind(struct FsmInst *fi, int event, void *arg)
 101 {
 102         mISDN_FsmChangeState(fi, ST_L1_DEACT);
 103 }
 104 
 105 static void
 106 da_deactivate(struct FsmInst *fi, int event, void *arg)
 107 {
 108         struct manager  *mgr = fi->userdata;
 109         struct layer2   *l2;
 110         u_long          flags;
 111 
 112         read_lock_irqsave(&mgr->lock, flags);
 113         list_for_each_entry(l2, &mgr->layer2, list) {
 114                 if (l2->l2m.state > ST_L2_4) {
 115                         /* have still activ TEI */
 116                         read_unlock_irqrestore(&mgr->lock, flags);
 117                         return;
 118                 }
 119         }
 120         read_unlock_irqrestore(&mgr->lock, flags);
 121         /* All TEI are inactiv */
 122         if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
 123                 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
 124                                   NULL, 1);
 125                 mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
 126         }
 127 }
 128 
 129 static void
 130 da_ui(struct FsmInst *fi, int event, void *arg)
 131 {
 132         struct manager  *mgr = fi->userdata;
 133 
 134         /* restart da timer */
 135         if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
 136                 mISDN_FsmDelTimer(&mgr->datimer, 2);
 137                 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
 138                                   NULL, 2);
 139         }
 140 }
 141 
 142 static void
 143 da_timer(struct FsmInst *fi, int event, void *arg)
 144 {
 145         struct manager  *mgr = fi->userdata;
 146         struct layer2   *l2;
 147         u_long          flags;
 148 
 149         /* check again */
 150         read_lock_irqsave(&mgr->lock, flags);
 151         list_for_each_entry(l2, &mgr->layer2, list) {
 152                 if (l2->l2m.state > ST_L2_4) {
 153                         /* have still activ TEI */
 154                         read_unlock_irqrestore(&mgr->lock, flags);
 155                         mISDN_FsmChangeState(fi, ST_L1_ACTIV);
 156                         return;
 157                 }
 158         }
 159         read_unlock_irqrestore(&mgr->lock, flags);
 160         /* All TEI are inactiv */
 161         mISDN_FsmChangeState(fi, ST_L1_DEACT);
 162         _queue_data(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL,
 163                     GFP_ATOMIC);
 164 }
 165 
 166 static struct FsmNode DeactFnList[] =
 167 {
 168         {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate},
 169         {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind},
 170         {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate},
 171         {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate},
 172         {ST_L1_DEACT_PENDING, EV_UI, da_ui},
 173         {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer},
 174 };
 175 
 176 enum {
 177         ST_TEI_NOP,
 178         ST_TEI_IDREQ,
 179         ST_TEI_IDVERIFY,
 180 };
 181 
 182 #define TEI_STATE_COUNT (ST_TEI_IDVERIFY + 1)
 183 
 184 static char *strTeiState[] =
 185 {
 186         "ST_TEI_NOP",
 187         "ST_TEI_IDREQ",
 188         "ST_TEI_IDVERIFY",
 189 };
 190 
 191 enum {
 192         EV_IDREQ,
 193         EV_ASSIGN,
 194         EV_ASSIGN_REQ,
 195         EV_DENIED,
 196         EV_CHKREQ,
 197         EV_CHKRESP,
 198         EV_REMOVE,
 199         EV_VERIFY,
 200         EV_TIMER,
 201 };
 202 
 203 #define TEI_EVENT_COUNT (EV_TIMER + 1)
 204 
 205 static char *strTeiEvent[] =
 206 {
 207         "EV_IDREQ",
 208         "EV_ASSIGN",
 209         "EV_ASSIGN_REQ",
 210         "EV_DENIED",
 211         "EV_CHKREQ",
 212         "EV_CHKRESP",
 213         "EV_REMOVE",
 214         "EV_VERIFY",
 215         "EV_TIMER",
 216 };
 217 
 218 static void
 219 tei_debug(struct FsmInst *fi, char *fmt, ...)
 220 {
 221         struct teimgr   *tm = fi->userdata;
 222         struct va_format vaf;
 223         va_list va;
 224 
 225         if (!(*debug & DEBUG_L2_TEIFSM))
 226                 return;
 227 
 228         va_start(va, fmt);
 229 
 230         vaf.fmt = fmt;
 231         vaf.va = &va;
 232 
 233         printk(KERN_DEBUG "sapi(%d) tei(%d): %pV\n",
 234                tm->l2->sapi, tm->l2->tei, &vaf);
 235 
 236         va_end(va);
 237 }
 238 
 239 
 240 
 241 static int
 242 get_free_id(struct manager *mgr)
 243 {
 244         DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 };
 245         int             i;
 246         struct layer2   *l2;
 247 
 248         list_for_each_entry(l2, &mgr->layer2, list) {
 249                 if (l2->ch.nr > 63) {
 250                         printk(KERN_WARNING
 251                                "%s: more as 63 layer2 for one device\n",
 252                                __func__);
 253                         return -EBUSY;
 254                 }
 255                 __set_bit(l2->ch.nr, ids);
 256         }
 257         i = find_next_zero_bit(ids, 64, 1);
 258         if (i < 64)
 259                 return i;
 260         printk(KERN_WARNING "%s: more as 63 layer2 for one device\n",
 261                __func__);
 262         return -EBUSY;
 263 }
 264 
 265 static int
 266 get_free_tei(struct manager *mgr)
 267 {
 268         DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 };
 269         int             i;
 270         struct layer2   *l2;
 271 
 272         list_for_each_entry(l2, &mgr->layer2, list) {
 273                 if (l2->ch.nr == 0)
 274                         continue;
 275                 if ((l2->ch.addr & 0xff) != 0)
 276                         continue;
 277                 i = l2->ch.addr >> 8;
 278                 if (i < 64)
 279                         continue;
 280                 i -= 64;
 281 
 282                 __set_bit(i, ids);
 283         }
 284         i = find_first_zero_bit(ids, 64);
 285         if (i < 64)
 286                 return i + 64;
 287         printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n",
 288                __func__);
 289         return -1;
 290 }
 291 
 292 static void
 293 teiup_create(struct manager *mgr, u_int prim, int len, void *arg)
 294 {
 295         struct sk_buff  *skb;
 296         struct mISDNhead *hh;
 297         int             err;
 298 
 299         skb = mI_alloc_skb(len, GFP_ATOMIC);
 300         if (!skb)
 301                 return;
 302         hh = mISDN_HEAD_P(skb);
 303         hh->prim = prim;
 304         hh->id = (mgr->ch.nr << 16) | mgr->ch.addr;
 305         if (len)
 306                 skb_put_data(skb, arg, len);
 307         err = mgr->up->send(mgr->up, skb);
 308         if (err) {
 309                 printk(KERN_WARNING "%s: err=%d\n", __func__, err);
 310                 dev_kfree_skb(skb);
 311         }
 312 }
 313 
 314 static u_int
 315 new_id(struct manager *mgr)
 316 {
 317         u_int   id;
 318 
 319         id = mgr->nextid++;
 320         if (id == 0x7fff)
 321                 mgr->nextid = 1;
 322         id <<= 16;
 323         id |= GROUP_TEI << 8;
 324         id |= TEI_SAPI;
 325         return id;
 326 }
 327 
 328 static void
 329 do_send(struct manager *mgr)
 330 {
 331         if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
 332                 return;
 333 
 334         if (!test_and_set_bit(MGR_PH_NOTREADY, &mgr->options)) {
 335                 struct sk_buff  *skb = skb_dequeue(&mgr->sendq);
 336 
 337                 if (!skb) {
 338                         test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
 339                         return;
 340                 }
 341                 mgr->lastid = mISDN_HEAD_ID(skb);
 342                 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
 343                 if (mgr->ch.recv(mgr->ch.peer, skb)) {
 344                         dev_kfree_skb(skb);
 345                         test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
 346                         mgr->lastid = MISDN_ID_NONE;
 347                 }
 348         }
 349 }
 350 
 351 static void
 352 do_ack(struct manager *mgr, u_int id)
 353 {
 354         if (test_bit(MGR_PH_NOTREADY, &mgr->options)) {
 355                 if (id == mgr->lastid) {
 356                         if (test_bit(MGR_PH_ACTIVE, &mgr->options)) {
 357                                 struct sk_buff  *skb;
 358 
 359                                 skb = skb_dequeue(&mgr->sendq);
 360                                 if (skb) {
 361                                         mgr->lastid = mISDN_HEAD_ID(skb);
 362                                         if (!mgr->ch.recv(mgr->ch.peer, skb))
 363                                                 return;
 364                                         dev_kfree_skb(skb);
 365                                 }
 366                         }
 367                         mgr->lastid = MISDN_ID_NONE;
 368                         test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
 369                 }
 370         }
 371 }
 372 
 373 static void
 374 mgr_send_down(struct manager *mgr, struct sk_buff *skb)
 375 {
 376         skb_queue_tail(&mgr->sendq, skb);
 377         if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) {
 378                 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
 379                             NULL, GFP_KERNEL);
 380         } else {
 381                 do_send(mgr);
 382         }
 383 }
 384 
 385 static int
 386 dl_unit_data(struct manager *mgr, struct sk_buff *skb)
 387 {
 388         if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */
 389                 return -EINVAL;
 390         if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
 391                 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
 392                             NULL, GFP_KERNEL);
 393         skb_push(skb, 3);
 394         skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */
 395         skb->data[1] = 0xff; /* TEI 127 */
 396         skb->data[2] = UI;   /* UI frame */
 397         mISDN_HEAD_PRIM(skb) = PH_DATA_REQ;
 398         mISDN_HEAD_ID(skb) = new_id(mgr);
 399         skb_queue_tail(&mgr->sendq, skb);
 400         do_send(mgr);
 401         return 0;
 402 }
 403 
 404 static unsigned int
 405 random_ri(void)
 406 {
 407         u16 x;
 408 
 409         get_random_bytes(&x, sizeof(x));
 410         return x;
 411 }
 412 
 413 static struct layer2 *
 414 findtei(struct manager *mgr, int tei)
 415 {
 416         struct layer2   *l2;
 417         u_long          flags;
 418 
 419         read_lock_irqsave(&mgr->lock, flags);
 420         list_for_each_entry(l2, &mgr->layer2, list) {
 421                 if ((l2->sapi == 0) && (l2->tei > 0) &&
 422                     (l2->tei != GROUP_TEI) && (l2->tei == tei))
 423                         goto done;
 424         }
 425         l2 = NULL;
 426 done:
 427         read_unlock_irqrestore(&mgr->lock, flags);
 428         return l2;
 429 }
 430 
 431 static void
 432 put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei)
 433 {
 434         struct sk_buff *skb;
 435         u_char bp[8];
 436 
 437         bp[0] = (TEI_SAPI << 2);
 438         if (test_bit(MGR_OPT_NETWORK, &mgr->options))
 439                 bp[0] |= 2; /* CR:=1 for net command */
 440         bp[1] = (GROUP_TEI << 1) | 0x1;
 441         bp[2] = UI;
 442         bp[3] = TEI_ENTITY_ID;
 443         bp[4] = ri >> 8;
 444         bp[5] = ri & 0xff;
 445         bp[6] = m_id;
 446         bp[7] = ((tei << 1) & 0xff) | 1;
 447         skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC);
 448         if (!skb) {
 449                 printk(KERN_WARNING "%s: no skb for tei msg\n", __func__);
 450                 return;
 451         }
 452         mgr_send_down(mgr, skb);
 453 }
 454 
 455 static void
 456 tei_id_request(struct FsmInst *fi, int event, void *arg)
 457 {
 458         struct teimgr *tm = fi->userdata;
 459 
 460         if (tm->l2->tei != GROUP_TEI) {
 461                 tm->tei_m.printdebug(&tm->tei_m,
 462                                      "assign request for already assigned tei %d",
 463                                      tm->l2->tei);
 464                 return;
 465         }
 466         tm->ri = random_ri();
 467         if (*debug & DEBUG_L2_TEI)
 468                 tm->tei_m.printdebug(&tm->tei_m,
 469                                      "assign request ri %d", tm->ri);
 470         put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
 471         mISDN_FsmChangeState(fi, ST_TEI_IDREQ);
 472         mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1);
 473         tm->nval = 3;
 474 }
 475 
 476 static void
 477 tei_id_assign(struct FsmInst *fi, int event, void *arg)
 478 {
 479         struct teimgr   *tm = fi->userdata;
 480         struct layer2   *l2;
 481         u_char *dp = arg;
 482         int ri, tei;
 483 
 484         ri = ((unsigned int) *dp++ << 8);
 485         ri += *dp++;
 486         dp++;
 487         tei = *dp >> 1;
 488         if (*debug & DEBUG_L2_TEI)
 489                 tm->tei_m.printdebug(fi, "identity assign ri %d tei %d",
 490                                      ri, tei);
 491         l2 = findtei(tm->mgr, tei);
 492         if (l2) {       /* same tei is in use */
 493                 if (ri != l2->tm->ri) {
 494                         tm->tei_m.printdebug(fi,
 495                                              "possible duplicate assignment tei %d", tei);
 496                         tei_l2(l2, MDL_ERROR_RSP, 0);
 497                 }
 498         } else if (ri == tm->ri) {
 499                 mISDN_FsmDelTimer(&tm->timer, 1);
 500                 mISDN_FsmChangeState(fi, ST_TEI_NOP);
 501                 tei_l2(tm->l2, MDL_ASSIGN_REQ, tei);
 502         }
 503 }
 504 
 505 static void
 506 tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
 507 {
 508         struct teimgr   *tm = fi->userdata;
 509         struct layer2   *l2;
 510         u_char *dp = arg;
 511         int tei, ri;
 512 
 513         ri = ((unsigned int) *dp++ << 8);
 514         ri += *dp++;
 515         dp++;
 516         tei = *dp >> 1;
 517         if (*debug & DEBUG_L2_TEI)
 518                 tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d",
 519                                      ri, tei);
 520         l2 = findtei(tm->mgr, tei);
 521         if (l2) {       /* same tei is in use */
 522                 if (ri != l2->tm->ri) { /* and it wasn't our request */
 523                         tm->tei_m.printdebug(fi,
 524                                              "possible duplicate assignment tei %d", tei);
 525                         mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL);
 526                 }
 527         }
 528 }
 529 
 530 static void
 531 tei_id_denied(struct FsmInst *fi, int event, void *arg)
 532 {
 533         struct teimgr *tm = fi->userdata;
 534         u_char *dp = arg;
 535         int ri, tei;
 536 
 537         ri = ((unsigned int) *dp++ << 8);
 538         ri += *dp++;
 539         dp++;
 540         tei = *dp >> 1;
 541         if (*debug & DEBUG_L2_TEI)
 542                 tm->tei_m.printdebug(fi, "identity denied ri %d tei %d",
 543                                      ri, tei);
 544 }
 545 
 546 static void
 547 tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
 548 {
 549         struct teimgr *tm = fi->userdata;
 550         u_char *dp = arg;
 551         int tei;
 552 
 553         tei = *(dp + 3) >> 1;
 554         if (*debug & DEBUG_L2_TEI)
 555                 tm->tei_m.printdebug(fi, "identity check req tei %d", tei);
 556         if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) ||
 557                                            (tei == tm->l2->tei))) {
 558                 mISDN_FsmDelTimer(&tm->timer, 4);
 559                 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
 560                 put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), tm->l2->tei);
 561         }
 562 }
 563 
 564 static void
 565 tei_id_remove(struct FsmInst *fi, int event, void *arg)
 566 {
 567         struct teimgr *tm = fi->userdata;
 568         u_char *dp = arg;
 569         int tei;
 570 
 571         tei = *(dp + 3) >> 1;
 572         if (*debug & DEBUG_L2_TEI)
 573                 tm->tei_m.printdebug(fi, "identity remove tei %d", tei);
 574         if ((tm->l2->tei != GROUP_TEI) &&
 575             ((tei == GROUP_TEI) || (tei == tm->l2->tei))) {
 576                 mISDN_FsmDelTimer(&tm->timer, 5);
 577                 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
 578                 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
 579         }
 580 }
 581 
 582 static void
 583 tei_id_verify(struct FsmInst *fi, int event, void *arg)
 584 {
 585         struct teimgr *tm = fi->userdata;
 586 
 587         if (*debug & DEBUG_L2_TEI)
 588                 tm->tei_m.printdebug(fi, "id verify request for tei %d",
 589                                      tm->l2->tei);
 590         put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
 591         mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
 592         mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
 593         tm->nval = 2;
 594 }
 595 
 596 static void
 597 tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
 598 {
 599         struct teimgr *tm = fi->userdata;
 600 
 601         if (--tm->nval) {
 602                 tm->ri = random_ri();
 603                 if (*debug & DEBUG_L2_TEI)
 604                         tm->tei_m.printdebug(fi, "assign req(%d) ri %d",
 605                                              4 - tm->nval, tm->ri);
 606                 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
 607                 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3);
 608         } else {
 609                 tm->tei_m.printdebug(fi, "assign req failed");
 610                 tei_l2(tm->l2, MDL_ERROR_RSP, 0);
 611                 mISDN_FsmChangeState(fi, ST_TEI_NOP);
 612         }
 613 }
 614 
 615 static void
 616 tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
 617 {
 618         struct teimgr *tm = fi->userdata;
 619 
 620         if (--tm->nval) {
 621                 if (*debug & DEBUG_L2_TEI)
 622                         tm->tei_m.printdebug(fi,
 623                                              "id verify req(%d) for tei %d",
 624                                              3 - tm->nval, tm->l2->tei);
 625                 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
 626                 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
 627         } else {
 628                 tm->tei_m.printdebug(fi, "verify req for tei %d failed",
 629                                      tm->l2->tei);
 630                 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
 631                 mISDN_FsmChangeState(fi, ST_TEI_NOP);
 632         }
 633 }
 634 
 635 static struct FsmNode TeiFnListUser[] =
 636 {
 637         {ST_TEI_NOP, EV_IDREQ, tei_id_request},
 638         {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
 639         {ST_TEI_NOP, EV_VERIFY, tei_id_verify},
 640         {ST_TEI_NOP, EV_REMOVE, tei_id_remove},
 641         {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
 642         {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout},
 643         {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
 644         {ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
 645         {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout},
 646         {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
 647         {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
 648 };
 649 
 650 static void
 651 tei_l2remove(struct layer2 *l2)
 652 {
 653         put_tei_msg(l2->tm->mgr, ID_REMOVE, 0, l2->tei);
 654         tei_l2(l2, MDL_REMOVE_REQ, 0);
 655         list_del(&l2->ch.list);
 656         l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
 657 }
 658 
 659 static void
 660 tei_assign_req(struct FsmInst *fi, int event, void *arg)
 661 {
 662         struct teimgr *tm = fi->userdata;
 663         u_char *dp = arg;
 664 
 665         if (tm->l2->tei == GROUP_TEI) {
 666                 tm->tei_m.printdebug(&tm->tei_m,
 667                                      "net tei assign request without tei");
 668                 return;
 669         }
 670         tm->ri = ((unsigned int) *dp++ << 8);
 671         tm->ri += *dp++;
 672         if (*debug & DEBUG_L2_TEI)
 673                 tm->tei_m.printdebug(&tm->tei_m,
 674                                      "net assign request ri %d teim %d", tm->ri, *dp);
 675         put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, tm->l2->tei);
 676         mISDN_FsmChangeState(fi, ST_TEI_NOP);
 677 }
 678 
 679 static void
 680 tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg)
 681 {
 682         struct teimgr   *tm = fi->userdata;
 683 
 684         if (*debug & DEBUG_L2_TEI)
 685                 tm->tei_m.printdebug(fi, "id check request for tei %d",
 686                                      tm->l2->tei);
 687         tm->rcnt = 0;
 688         put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
 689         mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
 690         mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
 691         tm->nval = 2;
 692 }
 693 
 694 static void
 695 tei_id_chk_resp(struct FsmInst *fi, int event, void *arg)
 696 {
 697         struct teimgr *tm = fi->userdata;
 698         u_char *dp = arg;
 699         int tei;
 700 
 701         tei = dp[3] >> 1;
 702         if (*debug & DEBUG_L2_TEI)
 703                 tm->tei_m.printdebug(fi, "identity check resp tei %d", tei);
 704         if (tei == tm->l2->tei)
 705                 tm->rcnt++;
 706 }
 707 
 708 static void
 709 tei_id_verify_net(struct FsmInst *fi, int event, void *arg)
 710 {
 711         struct teimgr *tm = fi->userdata;
 712         u_char *dp = arg;
 713         int tei;
 714 
 715         tei = dp[3] >> 1;
 716         if (*debug & DEBUG_L2_TEI)
 717                 tm->tei_m.printdebug(fi, "identity verify req tei %d/%d",
 718                                      tei, tm->l2->tei);
 719         if (tei == tm->l2->tei)
 720                 tei_id_chk_req_net(fi, event, arg);
 721 }
 722 
 723 static void
 724 tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg)
 725 {
 726         struct teimgr *tm = fi->userdata;
 727 
 728         if (tm->rcnt == 1) {
 729                 if (*debug & DEBUG_L2_TEI)
 730                         tm->tei_m.printdebug(fi,
 731                                              "check req for tei %d successful\n", tm->l2->tei);
 732                 mISDN_FsmChangeState(fi, ST_TEI_NOP);
 733         } else if (tm->rcnt > 1) {
 734                 /* duplicate assignment; remove */
 735                 tei_l2remove(tm->l2);
 736         } else if (--tm->nval) {
 737                 if (*debug & DEBUG_L2_TEI)
 738                         tm->tei_m.printdebug(fi,
 739                                              "id check req(%d) for tei %d",
 740                                              3 - tm->nval, tm->l2->tei);
 741                 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
 742                 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
 743         } else {
 744                 tm->tei_m.printdebug(fi, "check req for tei %d failed",
 745                                      tm->l2->tei);
 746                 mISDN_FsmChangeState(fi, ST_TEI_NOP);
 747                 tei_l2remove(tm->l2);
 748         }
 749 }
 750 
 751 static struct FsmNode TeiFnListNet[] =
 752 {
 753         {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req},
 754         {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net},
 755         {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net},
 756         {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net},
 757         {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp},
 758 };
 759 
 760 static void
 761 tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len)
 762 {
 763         if (test_bit(FLG_FIXED_TEI, &tm->l2->flag))
 764                 return;
 765         if (*debug & DEBUG_L2_TEI)
 766                 tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x", mt);
 767         if (mt == ID_ASSIGNED)
 768                 mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp);
 769         else if (mt == ID_DENIED)
 770                 mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp);
 771         else if (mt == ID_CHK_REQ)
 772                 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp);
 773         else if (mt == ID_REMOVE)
 774                 mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp);
 775         else if (mt == ID_VERIFY)
 776                 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp);
 777         else if (mt == ID_CHK_RES)
 778                 mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp);
 779 }
 780 
 781 static struct layer2 *
 782 create_new_tei(struct manager *mgr, int tei, int sapi)
 783 {
 784         unsigned long           opt = 0;
 785         unsigned long           flags;
 786         int                     id;
 787         struct layer2           *l2;
 788         struct channel_req      rq;
 789 
 790         if (!mgr->up)
 791                 return NULL;
 792         if ((tei >= 0) && (tei < 64))
 793                 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
 794         if (mgr->ch.st->dev->Dprotocols & ((1 << ISDN_P_TE_E1) |
 795             (1 << ISDN_P_NT_E1))) {
 796                 test_and_set_bit(OPTION_L2_PMX, &opt);
 797                 rq.protocol = ISDN_P_NT_E1;
 798         } else {
 799                 rq.protocol = ISDN_P_NT_S0;
 800         }
 801         l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi);
 802         if (!l2) {
 803                 printk(KERN_WARNING "%s:no memory for layer2\n", __func__);
 804                 return NULL;
 805         }
 806         l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
 807         if (!l2->tm) {
 808                 kfree(l2);
 809                 printk(KERN_WARNING "%s:no memory for teimgr\n", __func__);
 810                 return NULL;
 811         }
 812         l2->tm->mgr = mgr;
 813         l2->tm->l2 = l2;
 814         l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
 815         l2->tm->tei_m.userdata = l2->tm;
 816         l2->tm->tei_m.printdebug = tei_debug;
 817         l2->tm->tei_m.fsm = &teifsmn;
 818         l2->tm->tei_m.state = ST_TEI_NOP;
 819         l2->tm->tval = 2000; /* T202  2 sec */
 820         mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
 821         write_lock_irqsave(&mgr->lock, flags);
 822         id = get_free_id(mgr);
 823         list_add_tail(&l2->list, &mgr->layer2);
 824         write_unlock_irqrestore(&mgr->lock, flags);
 825         if (id < 0) {
 826                 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
 827                 printk(KERN_WARNING "%s:no free id\n", __func__);
 828                 return NULL;
 829         } else {
 830                 l2->ch.nr = id;
 831                 __add_layer2(&l2->ch, mgr->ch.st);
 832                 l2->ch.recv = mgr->ch.recv;
 833                 l2->ch.peer = mgr->ch.peer;
 834                 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
 835                 /* We need open here L1 for the manager as well (refcounting) */
 836                 rq.adr.dev = mgr->ch.st->dev->id;
 837                 id = mgr->ch.st->own.ctrl(&mgr->ch.st->own, OPEN_CHANNEL, &rq);
 838                 if (id < 0) {
 839                         printk(KERN_WARNING "%s: cannot open L1\n", __func__);
 840                         l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
 841                         l2 = NULL;
 842                 }
 843         }
 844         return l2;
 845 }
 846 
 847 static void
 848 new_tei_req(struct manager *mgr, u_char *dp)
 849 {
 850         int             tei, ri;
 851         struct layer2   *l2;
 852 
 853         ri = dp[0] << 8;
 854         ri += dp[1];
 855         if (!mgr->up)
 856                 goto denied;
 857         if (!(dp[3] & 1)) /* Extension bit != 1 */
 858                 goto denied;
 859         if (dp[3] != 0xff)
 860                 tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */
 861         else
 862                 tei = get_free_tei(mgr);
 863         if (tei < 0) {
 864                 printk(KERN_WARNING "%s:No free tei\n", __func__);
 865                 goto denied;
 866         }
 867         l2 = create_new_tei(mgr, tei, CTRL_SAPI);
 868         if (!l2)
 869                 goto denied;
 870         else
 871                 mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp);
 872         return;
 873 denied:
 874         put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI);
 875 }
 876 
 877 static int
 878 ph_data_ind(struct manager *mgr, struct sk_buff *skb)
 879 {
 880         int             ret = -EINVAL;
 881         struct layer2   *l2, *nl2;
 882         u_char          mt;
 883 
 884         if (skb->len < 8) {
 885                 if (*debug  & DEBUG_L2_TEI)
 886                         printk(KERN_DEBUG "%s: short mgr frame %d/8\n",
 887                                __func__, skb->len);
 888                 goto done;
 889         }
 890 
 891         if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */
 892                 goto done;
 893         if (skb->data[0] & 1) /* EA0 formal error */
 894                 goto done;
 895         if (!(skb->data[1] & 1)) /* EA1 formal error */
 896                 goto done;
 897         if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */
 898                 goto done;
 899         if ((skb->data[2] & 0xef) != UI) /* not UI */
 900                 goto done;
 901         if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */
 902                 goto done;
 903         mt = skb->data[6];
 904         switch (mt) {
 905         case ID_REQUEST:
 906         case ID_CHK_RES:
 907         case ID_VERIFY:
 908                 if (!test_bit(MGR_OPT_NETWORK, &mgr->options))
 909                         goto done;
 910                 break;
 911         case ID_ASSIGNED:
 912         case ID_DENIED:
 913         case ID_CHK_REQ:
 914         case ID_REMOVE:
 915                 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
 916                         goto done;
 917                 break;
 918         default:
 919                 goto done;
 920         }
 921         ret = 0;
 922         if (mt == ID_REQUEST) {
 923                 new_tei_req(mgr, &skb->data[4]);
 924                 goto done;
 925         }
 926         list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
 927                 tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4);
 928         }
 929 done:
 930         return ret;
 931 }
 932 
 933 int
 934 l2_tei(struct layer2 *l2, u_int cmd, u_long arg)
 935 {
 936         struct teimgr   *tm = l2->tm;
 937 
 938         if (test_bit(FLG_FIXED_TEI, &l2->flag))
 939                 return 0;
 940         if (*debug & DEBUG_L2_TEI)
 941                 printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
 942         switch (cmd) {
 943         case MDL_ASSIGN_IND:
 944                 mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL);
 945                 break;
 946         case MDL_ERROR_IND:
 947                 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
 948                         mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei);
 949                 if (test_bit(MGR_OPT_USER, &tm->mgr->options))
 950                         mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL);
 951                 break;
 952         case MDL_STATUS_UP_IND:
 953                 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
 954                         mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL);
 955                 break;
 956         case MDL_STATUS_DOWN_IND:
 957                 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
 958                         mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL);
 959                 break;
 960         case MDL_STATUS_UI_IND:
 961                 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
 962                         mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL);
 963                 break;
 964         }
 965         return 0;
 966 }
 967 
 968 void
 969 TEIrelease(struct layer2 *l2)
 970 {
 971         struct teimgr   *tm = l2->tm;
 972         u_long          flags;
 973 
 974         mISDN_FsmDelTimer(&tm->timer, 1);
 975         write_lock_irqsave(&tm->mgr->lock, flags);
 976         list_del(&l2->list);
 977         write_unlock_irqrestore(&tm->mgr->lock, flags);
 978         l2->tm = NULL;
 979         kfree(tm);
 980 }
 981 
 982 static int
 983 create_teimgr(struct manager *mgr, struct channel_req *crq)
 984 {
 985         struct layer2           *l2;
 986         unsigned long           opt = 0;
 987         unsigned long           flags;
 988         int                     id;
 989         struct channel_req      l1rq;
 990 
 991         if (*debug & DEBUG_L2_TEI)
 992                 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
 993                        __func__, dev_name(&mgr->ch.st->dev->dev),
 994                        crq->protocol, crq->adr.dev, crq->adr.channel,
 995                        crq->adr.sapi, crq->adr.tei);
 996         if (crq->adr.tei > GROUP_TEI)
 997                 return -EINVAL;
 998         if (crq->adr.tei < 64)
 999                 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
1000         if (crq->adr.tei == 0)
1001                 test_and_set_bit(OPTION_L2_PTP, &opt);
1002         if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1003                 if (crq->protocol == ISDN_P_LAPD_TE)
1004                         return -EPROTONOSUPPORT;
1005                 if ((crq->adr.tei != 0) && (crq->adr.tei != 127))
1006                         return -EINVAL;
1007                 if (mgr->up) {
1008                         printk(KERN_WARNING
1009                                "%s: only one network manager is allowed\n",
1010                                __func__);
1011                         return -EBUSY;
1012                 }
1013         } else if (test_bit(MGR_OPT_USER, &mgr->options)) {
1014                 if (crq->protocol == ISDN_P_LAPD_NT)
1015                         return -EPROTONOSUPPORT;
1016                 if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI))
1017                         return -EINVAL; /* dyn tei */
1018         } else {
1019                 if (crq->protocol == ISDN_P_LAPD_NT)
1020                         test_and_set_bit(MGR_OPT_NETWORK, &mgr->options);
1021                 if (crq->protocol == ISDN_P_LAPD_TE)
1022                         test_and_set_bit(MGR_OPT_USER, &mgr->options);
1023         }
1024         l1rq.adr = crq->adr;
1025         if (mgr->ch.st->dev->Dprotocols
1026             & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
1027                 test_and_set_bit(OPTION_L2_PMX, &opt);
1028         if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) {
1029                 mgr->up = crq->ch;
1030                 id = DL_INFO_L2_CONNECT;
1031                 teiup_create(mgr, DL_INFORMATION_IND, sizeof(id), &id);
1032                 if (test_bit(MGR_PH_ACTIVE, &mgr->options))
1033                         teiup_create(mgr, PH_ACTIVATE_IND, 0, NULL);
1034                 crq->ch = NULL;
1035                 if (!list_empty(&mgr->layer2)) {
1036                         read_lock_irqsave(&mgr->lock, flags);
1037                         list_for_each_entry(l2, &mgr->layer2, list) {
1038                                 l2->up = mgr->up;
1039                                 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
1040                         }
1041                         read_unlock_irqrestore(&mgr->lock, flags);
1042                 }
1043                 return 0;
1044         }
1045         l2 = create_l2(crq->ch, crq->protocol, opt,
1046                        crq->adr.tei, crq->adr.sapi);
1047         if (!l2)
1048                 return -ENOMEM;
1049         l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
1050         if (!l2->tm) {
1051                 kfree(l2);
1052                 printk(KERN_ERR "kmalloc teimgr failed\n");
1053                 return -ENOMEM;
1054         }
1055         l2->tm->mgr = mgr;
1056         l2->tm->l2 = l2;
1057         l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
1058         l2->tm->tei_m.userdata = l2->tm;
1059         l2->tm->tei_m.printdebug = tei_debug;
1060         if (crq->protocol == ISDN_P_LAPD_TE) {
1061                 l2->tm->tei_m.fsm = &teifsmu;
1062                 l2->tm->tei_m.state = ST_TEI_NOP;
1063                 l2->tm->tval = 1000; /* T201  1 sec */
1064                 if (test_bit(OPTION_L2_PMX, &opt))
1065                         l1rq.protocol = ISDN_P_TE_E1;
1066                 else
1067                         l1rq.protocol = ISDN_P_TE_S0;
1068         } else {
1069                 l2->tm->tei_m.fsm = &teifsmn;
1070                 l2->tm->tei_m.state = ST_TEI_NOP;
1071                 l2->tm->tval = 2000; /* T202  2 sec */
1072                 if (test_bit(OPTION_L2_PMX, &opt))
1073                         l1rq.protocol = ISDN_P_NT_E1;
1074                 else
1075                         l1rq.protocol = ISDN_P_NT_S0;
1076         }
1077         mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
1078         write_lock_irqsave(&mgr->lock, flags);
1079         id = get_free_id(mgr);
1080         list_add_tail(&l2->list, &mgr->layer2);
1081         write_unlock_irqrestore(&mgr->lock, flags);
1082         if (id >= 0) {
1083                 l2->ch.nr = id;
1084                 l2->up->nr = id;
1085                 crq->ch = &l2->ch;
1086                 /* We need open here L1 for the manager as well (refcounting) */
1087                 id = mgr->ch.st->own.ctrl(&mgr->ch.st->own, OPEN_CHANNEL,
1088                                           &l1rq);
1089         }
1090         if (id < 0)
1091                 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1092         return id;
1093 }
1094 
1095 static int
1096 mgr_send(struct mISDNchannel *ch, struct sk_buff *skb)
1097 {
1098         struct manager  *mgr;
1099         struct mISDNhead        *hh =  mISDN_HEAD_P(skb);
1100         int                     ret = -EINVAL;
1101 
1102         mgr = container_of(ch, struct manager, ch);
1103         if (*debug & DEBUG_L2_RECV)
1104                 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1105                        __func__, hh->prim, hh->id);
1106         switch (hh->prim) {
1107         case PH_DATA_IND:
1108                 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
1109                 ret = ph_data_ind(mgr, skb);
1110                 break;
1111         case PH_DATA_CNF:
1112                 do_ack(mgr, hh->id);
1113                 ret = 0;
1114                 break;
1115         case PH_ACTIVATE_IND:
1116                 test_and_set_bit(MGR_PH_ACTIVE, &mgr->options);
1117                 if (mgr->up)
1118                         teiup_create(mgr, PH_ACTIVATE_IND, 0, NULL);
1119                 mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL);
1120                 do_send(mgr);
1121                 ret = 0;
1122                 break;
1123         case PH_DEACTIVATE_IND:
1124                 test_and_clear_bit(MGR_PH_ACTIVE, &mgr->options);
1125                 if (mgr->up)
1126                         teiup_create(mgr, PH_DEACTIVATE_IND, 0, NULL);
1127                 mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL);
1128                 ret = 0;
1129                 break;
1130         case DL_UNITDATA_REQ:
1131                 return dl_unit_data(mgr, skb);
1132         }
1133         if (!ret)
1134                 dev_kfree_skb(skb);
1135         return ret;
1136 }
1137 
1138 static int
1139 free_teimanager(struct manager *mgr)
1140 {
1141         struct layer2   *l2, *nl2;
1142 
1143         test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1144         if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1145                 /* not locked lock is taken in release tei */
1146                 mgr->up = NULL;
1147                 if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) {
1148                         list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1149                                 put_tei_msg(mgr, ID_REMOVE, 0, l2->tei);
1150                                 mutex_lock(&mgr->ch.st->lmutex);
1151                                 list_del(&l2->ch.list);
1152                                 mutex_unlock(&mgr->ch.st->lmutex);
1153                                 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1154                         }
1155                         test_and_clear_bit(MGR_OPT_NETWORK, &mgr->options);
1156                 } else {
1157                         list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1158                                 l2->up = NULL;
1159                         }
1160                 }
1161         }
1162         if (test_bit(MGR_OPT_USER, &mgr->options)) {
1163                 if (list_empty(&mgr->layer2))
1164                         test_and_clear_bit(MGR_OPT_USER, &mgr->options);
1165         }
1166         mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL);
1167         return 0;
1168 }
1169 
1170 static int
1171 ctrl_teimanager(struct manager *mgr, void *arg)
1172 {
1173         /* currently we only have one option */
1174         unsigned int *val = (unsigned int *)arg;
1175 
1176         switch (val[0]) {
1177         case IMCLEAR_L2:
1178                 if (val[1])
1179                         test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
1180                 else
1181                         test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
1182                 break;
1183         case IMHOLD_L1:
1184                 if (val[1])
1185                         test_and_set_bit(OPTION_L1_HOLD, &mgr->options);
1186                 else
1187                         test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1188                 break;
1189         default:
1190                 return -EINVAL;
1191         }
1192         return 0;
1193 }
1194 
1195 /* This function does create a L2 for fixed TEI in NT Mode */
1196 static int
1197 check_data(struct manager *mgr, struct sk_buff *skb)
1198 {
1199         struct mISDNhead        *hh =  mISDN_HEAD_P(skb);
1200         int                     ret, tei, sapi;
1201         struct layer2           *l2;
1202 
1203         if (*debug & DEBUG_L2_CTRL)
1204                 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1205                        __func__, hh->prim, hh->id);
1206         if (test_bit(MGR_OPT_USER, &mgr->options))
1207                 return -ENOTCONN;
1208         if (hh->prim != PH_DATA_IND)
1209                 return -ENOTCONN;
1210         if (skb->len != 3)
1211                 return -ENOTCONN;
1212         if (skb->data[0] & 3) /* EA0 and CR must be  0 */
1213                 return -EINVAL;
1214         sapi = skb->data[0] >> 2;
1215         if (!(skb->data[1] & 1)) /* invalid EA1 */
1216                 return -EINVAL;
1217         tei = skb->data[1] >> 1;
1218         if (tei > 63) /* not a fixed tei */
1219                 return -ENOTCONN;
1220         if ((skb->data[2] & ~0x10) != SABME)
1221                 return -ENOTCONN;
1222         /* We got a SABME for a fixed TEI */
1223         if (*debug & DEBUG_L2_CTRL)
1224                 printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n",
1225                        __func__, sapi, tei);
1226         l2 = create_new_tei(mgr, tei, sapi);
1227         if (!l2) {
1228                 if (*debug & DEBUG_L2_CTRL)
1229                         printk(KERN_DEBUG "%s: failed to create new tei\n",
1230                                __func__);
1231                 return -ENOMEM;
1232         }
1233         ret = l2->ch.send(&l2->ch, skb);
1234         return ret;
1235 }
1236 
1237 void
1238 delete_teimanager(struct mISDNchannel *ch)
1239 {
1240         struct manager  *mgr;
1241         struct layer2   *l2, *nl2;
1242 
1243         mgr = container_of(ch, struct manager, ch);
1244         /* not locked lock is taken in release tei */
1245         list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1246                 mutex_lock(&mgr->ch.st->lmutex);
1247                 list_del(&l2->ch.list);
1248                 mutex_unlock(&mgr->ch.st->lmutex);
1249                 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1250         }
1251         list_del(&mgr->ch.list);
1252         list_del(&mgr->bcast.list);
1253         skb_queue_purge(&mgr->sendq);
1254         kfree(mgr);
1255 }
1256 
1257 static int
1258 mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1259 {
1260         struct manager  *mgr;
1261         int             ret = -EINVAL;
1262 
1263         mgr = container_of(ch, struct manager, ch);
1264         if (*debug & DEBUG_L2_CTRL)
1265                 printk(KERN_DEBUG "%s(%x, %p)\n", __func__, cmd, arg);
1266         switch (cmd) {
1267         case OPEN_CHANNEL:
1268                 ret = create_teimgr(mgr, arg);
1269                 break;
1270         case CLOSE_CHANNEL:
1271                 ret = free_teimanager(mgr);
1272                 break;
1273         case CONTROL_CHANNEL:
1274                 ret = ctrl_teimanager(mgr, arg);
1275                 break;
1276         case CHECK_DATA:
1277                 ret = check_data(mgr, arg);
1278                 break;
1279         }
1280         return ret;
1281 }
1282 
1283 static int
1284 mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb)
1285 {
1286         struct manager          *mgr = container_of(ch, struct manager, bcast);
1287         struct mISDNhead        *hhc, *hh = mISDN_HEAD_P(skb);
1288         struct sk_buff          *cskb = NULL;
1289         struct layer2           *l2;
1290         u_long                  flags;
1291         int                     ret;
1292 
1293         read_lock_irqsave(&mgr->lock, flags);
1294         list_for_each_entry(l2, &mgr->layer2, list) {
1295                 if ((hh->id & MISDN_ID_SAPI_MASK) ==
1296                     (l2->ch.addr & MISDN_ID_SAPI_MASK)) {
1297                         if (list_is_last(&l2->list, &mgr->layer2)) {
1298                                 cskb = skb;
1299                                 skb = NULL;
1300                         } else {
1301                                 if (!cskb)
1302                                         cskb = skb_copy(skb, GFP_ATOMIC);
1303                         }
1304                         if (cskb) {
1305                                 hhc = mISDN_HEAD_P(cskb);
1306                                 /* save original header behind normal header */
1307                                 hhc++;
1308                                 *hhc = *hh;
1309                                 hhc--;
1310                                 hhc->prim = DL_INTERN_MSG;
1311                                 hhc->id = l2->ch.nr;
1312                                 ret = ch->st->own.recv(&ch->st->own, cskb);
1313                                 if (ret) {
1314                                         if (*debug & DEBUG_SEND_ERR)
1315                                                 printk(KERN_DEBUG
1316                                                        "%s ch%d prim(%x) addr(%x)"
1317                                                        " err %d\n",
1318                                                        __func__, l2->ch.nr,
1319                                                        hh->prim, l2->ch.addr, ret);
1320                                 } else
1321                                         cskb = NULL;
1322                         } else {
1323                                 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
1324                                        __func__, ch->nr, ch->addr);
1325                                 goto out;
1326                         }
1327                 }
1328         }
1329 out:
1330         read_unlock_irqrestore(&mgr->lock, flags);
1331         dev_kfree_skb(cskb);
1332         dev_kfree_skb(skb);
1333         return 0;
1334 }
1335 
1336 static int
1337 mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1338 {
1339 
1340         return -EINVAL;
1341 }
1342 
1343 int
1344 create_teimanager(struct mISDNdevice *dev)
1345 {
1346         struct manager *mgr;
1347 
1348         mgr = kzalloc(sizeof(struct manager), GFP_KERNEL);
1349         if (!mgr)
1350                 return -ENOMEM;
1351         INIT_LIST_HEAD(&mgr->layer2);
1352         rwlock_init(&mgr->lock);
1353         skb_queue_head_init(&mgr->sendq);
1354         mgr->nextid = 1;
1355         mgr->lastid = MISDN_ID_NONE;
1356         mgr->ch.send = mgr_send;
1357         mgr->ch.ctrl = mgr_ctrl;
1358         mgr->ch.st = dev->D.st;
1359         set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI);
1360         add_layer2(&mgr->ch, dev->D.st);
1361         mgr->bcast.send = mgr_bcast;
1362         mgr->bcast.ctrl = mgr_bcast_ctrl;
1363         mgr->bcast.st = dev->D.st;
1364         set_channel_address(&mgr->bcast, 0, GROUP_TEI);
1365         add_layer2(&mgr->bcast, dev->D.st);
1366         mgr->deact.debug = *debug & DEBUG_MANAGER;
1367         mgr->deact.userdata = mgr;
1368         mgr->deact.printdebug = da_debug;
1369         mgr->deact.fsm = &deactfsm;
1370         mgr->deact.state = ST_L1_DEACT;
1371         mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer);
1372         dev->teimgr = &mgr->ch;
1373         return 0;
1374 }
1375 
1376 int TEIInit(u_int *deb)
1377 {
1378         int res;
1379         debug = deb;
1380         teifsmu.state_count = TEI_STATE_COUNT;
1381         teifsmu.event_count = TEI_EVENT_COUNT;
1382         teifsmu.strEvent = strTeiEvent;
1383         teifsmu.strState = strTeiState;
1384         res = mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser));
1385         if (res)
1386                 goto error;
1387         teifsmn.state_count = TEI_STATE_COUNT;
1388         teifsmn.event_count = TEI_EVENT_COUNT;
1389         teifsmn.strEvent = strTeiEvent;
1390         teifsmn.strState = strTeiState;
1391         res = mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet));
1392         if (res)
1393                 goto error_smn;
1394         deactfsm.state_count =  DEACT_STATE_COUNT;
1395         deactfsm.event_count = DEACT_EVENT_COUNT;
1396         deactfsm.strEvent = strDeactEvent;
1397         deactfsm.strState = strDeactState;
1398         res = mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList));
1399         if (res)
1400                 goto error_deact;
1401         return 0;
1402 
1403 error_deact:
1404         mISDN_FsmFree(&teifsmn);
1405 error_smn:
1406         mISDN_FsmFree(&teifsmu);
1407 error:
1408         return res;
1409 }
1410 
1411 void TEIFree(void)
1412 {
1413         mISDN_FsmFree(&teifsmu);
1414         mISDN_FsmFree(&teifsmn);
1415         mISDN_FsmFree(&deactfsm);
1416 }

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