Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Author Karsten Keil <kkeil@novell.com> |
| 4 | * |
| 5 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | */ |
| 17 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 18 | #include <linux/mISDNif.h> |
| 19 | #include "core.h" |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 20 | #include "fsm.h" |
| 21 | #include "layer2.h" |
| 22 | |
Hannes Eder | dfa96ec | 2008-12-12 21:13:45 -0800 | [diff] [blame] | 23 | static u_int *debug; |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 24 | |
| 25 | static |
| 26 | struct Fsm l2fsm = {NULL, 0, 0, NULL, NULL}; |
| 27 | |
| 28 | static char *strL2State[] = |
| 29 | { |
| 30 | "ST_L2_1", |
| 31 | "ST_L2_2", |
| 32 | "ST_L2_3", |
| 33 | "ST_L2_4", |
| 34 | "ST_L2_5", |
| 35 | "ST_L2_6", |
| 36 | "ST_L2_7", |
| 37 | "ST_L2_8", |
| 38 | }; |
| 39 | |
| 40 | enum { |
| 41 | EV_L2_UI, |
| 42 | EV_L2_SABME, |
| 43 | EV_L2_DISC, |
| 44 | EV_L2_DM, |
| 45 | EV_L2_UA, |
| 46 | EV_L2_FRMR, |
| 47 | EV_L2_SUPER, |
| 48 | EV_L2_I, |
| 49 | EV_L2_DL_DATA, |
| 50 | EV_L2_ACK_PULL, |
| 51 | EV_L2_DL_UNITDATA, |
| 52 | EV_L2_DL_ESTABLISH_REQ, |
| 53 | EV_L2_DL_RELEASE_REQ, |
| 54 | EV_L2_MDL_ASSIGN, |
| 55 | EV_L2_MDL_REMOVE, |
| 56 | EV_L2_MDL_ERROR, |
| 57 | EV_L1_DEACTIVATE, |
| 58 | EV_L2_T200, |
| 59 | EV_L2_T203, |
| 60 | EV_L2_SET_OWN_BUSY, |
| 61 | EV_L2_CLEAR_OWN_BUSY, |
| 62 | EV_L2_FRAME_ERROR, |
| 63 | }; |
| 64 | |
| 65 | #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1) |
| 66 | |
| 67 | static char *strL2Event[] = |
| 68 | { |
| 69 | "EV_L2_UI", |
| 70 | "EV_L2_SABME", |
| 71 | "EV_L2_DISC", |
| 72 | "EV_L2_DM", |
| 73 | "EV_L2_UA", |
| 74 | "EV_L2_FRMR", |
| 75 | "EV_L2_SUPER", |
| 76 | "EV_L2_I", |
| 77 | "EV_L2_DL_DATA", |
| 78 | "EV_L2_ACK_PULL", |
| 79 | "EV_L2_DL_UNITDATA", |
| 80 | "EV_L2_DL_ESTABLISH_REQ", |
| 81 | "EV_L2_DL_RELEASE_REQ", |
| 82 | "EV_L2_MDL_ASSIGN", |
| 83 | "EV_L2_MDL_REMOVE", |
| 84 | "EV_L2_MDL_ERROR", |
| 85 | "EV_L1_DEACTIVATE", |
| 86 | "EV_L2_T200", |
| 87 | "EV_L2_T203", |
| 88 | "EV_L2_SET_OWN_BUSY", |
| 89 | "EV_L2_CLEAR_OWN_BUSY", |
| 90 | "EV_L2_FRAME_ERROR", |
| 91 | }; |
| 92 | |
| 93 | static void |
| 94 | l2m_debug(struct FsmInst *fi, char *fmt, ...) |
| 95 | { |
| 96 | struct layer2 *l2 = fi->userdata; |
| 97 | va_list va; |
| 98 | |
| 99 | if (!(*debug & DEBUG_L2_FSM)) |
| 100 | return; |
| 101 | va_start(va, fmt); |
| 102 | printk(KERN_DEBUG "l2 (tei %d): ", l2->tei); |
| 103 | vprintk(fmt, va); |
| 104 | printk("\n"); |
| 105 | va_end(va); |
| 106 | } |
| 107 | |
| 108 | inline u_int |
| 109 | l2headersize(struct layer2 *l2, int ui) |
| 110 | { |
| 111 | return ((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + |
| 112 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); |
| 113 | } |
| 114 | |
| 115 | inline u_int |
| 116 | l2addrsize(struct layer2 *l2) |
| 117 | { |
| 118 | return test_bit(FLG_LAPD, &l2->flag) ? 2 : 1; |
| 119 | } |
| 120 | |
| 121 | static u_int |
| 122 | l2_newid(struct layer2 *l2) |
| 123 | { |
| 124 | u_int id; |
| 125 | |
| 126 | id = l2->next_id++; |
| 127 | if (id == 0x7fff) |
| 128 | l2->next_id = 1; |
| 129 | id <<= 16; |
| 130 | id |= l2->tei << 8; |
| 131 | id |= l2->sapi; |
| 132 | return id; |
| 133 | } |
| 134 | |
| 135 | static void |
| 136 | l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb) |
| 137 | { |
| 138 | int err; |
| 139 | |
| 140 | if (!l2->up) |
| 141 | return; |
| 142 | mISDN_HEAD_PRIM(skb) = prim; |
| 143 | mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr; |
| 144 | err = l2->up->send(l2->up, skb); |
| 145 | if (err) { |
| 146 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); |
| 147 | dev_kfree_skb(skb); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | static void |
| 152 | l2up_create(struct layer2 *l2, u_int prim, int len, void *arg) |
| 153 | { |
| 154 | struct sk_buff *skb; |
| 155 | struct mISDNhead *hh; |
| 156 | int err; |
| 157 | |
| 158 | if (!l2->up) |
| 159 | return; |
| 160 | skb = mI_alloc_skb(len, GFP_ATOMIC); |
| 161 | if (!skb) |
| 162 | return; |
| 163 | hh = mISDN_HEAD_P(skb); |
| 164 | hh->prim = prim; |
| 165 | hh->id = (l2->ch.nr << 16) | l2->ch.addr; |
| 166 | if (len) |
| 167 | memcpy(skb_put(skb, len), arg, len); |
| 168 | err = l2->up->send(l2->up, skb); |
| 169 | if (err) { |
| 170 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); |
| 171 | dev_kfree_skb(skb); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | static int |
| 176 | l2down_skb(struct layer2 *l2, struct sk_buff *skb) { |
| 177 | int ret; |
| 178 | |
| 179 | ret = l2->ch.recv(l2->ch.peer, skb); |
| 180 | if (ret && (*debug & DEBUG_L2_RECV)) |
| 181 | printk(KERN_DEBUG "l2down_skb: ret(%d)\n", ret); |
| 182 | return ret; |
| 183 | } |
| 184 | |
| 185 | static int |
| 186 | l2down_raw(struct layer2 *l2, struct sk_buff *skb) |
| 187 | { |
| 188 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
| 189 | |
| 190 | if (hh->prim == PH_DATA_REQ) { |
| 191 | if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { |
| 192 | skb_queue_tail(&l2->down_queue, skb); |
| 193 | return 0; |
| 194 | } |
| 195 | l2->down_id = mISDN_HEAD_ID(skb); |
| 196 | } |
| 197 | return l2down_skb(l2, skb); |
| 198 | } |
| 199 | |
| 200 | static int |
| 201 | l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb) |
| 202 | { |
| 203 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
| 204 | |
| 205 | hh->prim = prim; |
| 206 | hh->id = id; |
| 207 | return l2down_raw(l2, skb); |
| 208 | } |
| 209 | |
| 210 | static int |
| 211 | l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg) |
| 212 | { |
| 213 | struct sk_buff *skb; |
| 214 | int err; |
| 215 | struct mISDNhead *hh; |
| 216 | |
| 217 | skb = mI_alloc_skb(len, GFP_ATOMIC); |
| 218 | if (!skb) |
| 219 | return -ENOMEM; |
| 220 | hh = mISDN_HEAD_P(skb); |
| 221 | hh->prim = prim; |
| 222 | hh->id = id; |
| 223 | if (len) |
| 224 | memcpy(skb_put(skb, len), arg, len); |
| 225 | err = l2down_raw(l2, skb); |
| 226 | if (err) |
| 227 | dev_kfree_skb(skb); |
| 228 | return err; |
| 229 | } |
| 230 | |
| 231 | static int |
| 232 | ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) { |
| 233 | struct sk_buff *nskb = skb; |
| 234 | int ret = -EAGAIN; |
| 235 | |
| 236 | if (test_bit(FLG_L1_NOTREADY, &l2->flag)) { |
| 237 | if (hh->id == l2->down_id) { |
| 238 | nskb = skb_dequeue(&l2->down_queue); |
| 239 | if (nskb) { |
| 240 | l2->down_id = mISDN_HEAD_ID(nskb); |
| 241 | if (l2down_skb(l2, nskb)) { |
| 242 | dev_kfree_skb(nskb); |
| 243 | l2->down_id = MISDN_ID_NONE; |
| 244 | } |
| 245 | } else |
| 246 | l2->down_id = MISDN_ID_NONE; |
| 247 | if (ret) { |
| 248 | dev_kfree_skb(skb); |
| 249 | ret = 0; |
| 250 | } |
| 251 | if (l2->down_id == MISDN_ID_NONE) { |
| 252 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); |
| 253 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { |
| 258 | nskb = skb_dequeue(&l2->down_queue); |
| 259 | if (nskb) { |
| 260 | l2->down_id = mISDN_HEAD_ID(nskb); |
| 261 | if (l2down_skb(l2, nskb)) { |
| 262 | dev_kfree_skb(nskb); |
| 263 | l2->down_id = MISDN_ID_NONE; |
| 264 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); |
| 265 | } |
| 266 | } else |
| 267 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); |
| 268 | } |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | static int |
| 273 | l2mgr(struct layer2 *l2, u_int prim, void *arg) { |
| 274 | long c = (long)arg; |
| 275 | |
| 276 | printk(KERN_WARNING |
| 277 | "l2mgr: addr:%x prim %x %c\n", l2->id, prim, (char)c); |
| 278 | if (test_bit(FLG_LAPD, &l2->flag) && |
| 279 | !test_bit(FLG_FIXED_TEI, &l2->flag)) { |
| 280 | switch (c) { |
| 281 | case 'C': |
| 282 | case 'D': |
| 283 | case 'G': |
| 284 | case 'H': |
| 285 | l2_tei(l2, prim, (u_long)arg); |
| 286 | break; |
| 287 | } |
| 288 | } |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | static void |
| 293 | set_peer_busy(struct layer2 *l2) { |
| 294 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); |
| 295 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) |
| 296 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); |
| 297 | } |
| 298 | |
| 299 | static void |
| 300 | clear_peer_busy(struct layer2 *l2) { |
| 301 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) |
| 302 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); |
| 303 | } |
| 304 | |
| 305 | static void |
| 306 | InitWin(struct layer2 *l2) |
| 307 | { |
| 308 | int i; |
| 309 | |
| 310 | for (i = 0; i < MAX_WINDOW; i++) |
| 311 | l2->windowar[i] = NULL; |
| 312 | } |
| 313 | |
| 314 | static int |
| 315 | freewin(struct layer2 *l2) |
| 316 | { |
| 317 | int i, cnt = 0; |
| 318 | |
| 319 | for (i = 0; i < MAX_WINDOW; i++) { |
| 320 | if (l2->windowar[i]) { |
| 321 | cnt++; |
| 322 | dev_kfree_skb(l2->windowar[i]); |
| 323 | l2->windowar[i] = NULL; |
| 324 | } |
| 325 | } |
| 326 | return cnt; |
| 327 | } |
| 328 | |
| 329 | static void |
| 330 | ReleaseWin(struct layer2 *l2) |
| 331 | { |
| 332 | int cnt = freewin(l2); |
| 333 | |
| 334 | if (cnt) |
| 335 | printk(KERN_WARNING |
| 336 | "isdnl2 freed %d skbuffs in release\n", cnt); |
| 337 | } |
| 338 | |
| 339 | inline unsigned int |
| 340 | cansend(struct layer2 *l2) |
| 341 | { |
| 342 | unsigned int p1; |
| 343 | |
| 344 | if (test_bit(FLG_MOD128, &l2->flag)) |
| 345 | p1 = (l2->vs - l2->va) % 128; |
| 346 | else |
| 347 | p1 = (l2->vs - l2->va) % 8; |
| 348 | return (p1 < l2->window) && !test_bit(FLG_PEER_BUSY, &l2->flag); |
| 349 | } |
| 350 | |
| 351 | inline void |
| 352 | clear_exception(struct layer2 *l2) |
| 353 | { |
| 354 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 355 | test_and_clear_bit(FLG_REJEXC, &l2->flag); |
| 356 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); |
| 357 | clear_peer_busy(l2); |
| 358 | } |
| 359 | |
| 360 | static int |
| 361 | sethdraddr(struct layer2 *l2, u_char *header, int rsp) |
| 362 | { |
| 363 | u_char *ptr = header; |
| 364 | int crbit = rsp; |
| 365 | |
| 366 | if (test_bit(FLG_LAPD, &l2->flag)) { |
| 367 | if (test_bit(FLG_LAPD_NET, &l2->flag)) |
| 368 | crbit = !crbit; |
| 369 | *ptr++ = (l2->sapi << 2) | (crbit ? 2 : 0); |
| 370 | *ptr++ = (l2->tei << 1) | 1; |
| 371 | return 2; |
| 372 | } else { |
| 373 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 374 | crbit = !crbit; |
| 375 | if (crbit) |
| 376 | *ptr++ = l2->addr.B; |
| 377 | else |
| 378 | *ptr++ = l2->addr.A; |
| 379 | return 1; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | static inline void |
| 384 | enqueue_super(struct layer2 *l2, struct sk_buff *skb) |
| 385 | { |
| 386 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) |
| 387 | dev_kfree_skb(skb); |
| 388 | } |
| 389 | |
| 390 | static inline void |
| 391 | enqueue_ui(struct layer2 *l2, struct sk_buff *skb) |
| 392 | { |
| 393 | if (l2->tm) |
| 394 | l2_tei(l2, MDL_STATUS_UI_IND, 0); |
| 395 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) |
| 396 | dev_kfree_skb(skb); |
| 397 | } |
| 398 | |
| 399 | inline int |
| 400 | IsUI(u_char *data) |
| 401 | { |
| 402 | return (data[0] & 0xef) == UI; |
| 403 | } |
| 404 | |
| 405 | inline int |
| 406 | IsUA(u_char *data) |
| 407 | { |
| 408 | return (data[0] & 0xef) == UA; |
| 409 | } |
| 410 | |
| 411 | inline int |
| 412 | IsDM(u_char *data) |
| 413 | { |
| 414 | return (data[0] & 0xef) == DM; |
| 415 | } |
| 416 | |
| 417 | inline int |
| 418 | IsDISC(u_char *data) |
| 419 | { |
| 420 | return (data[0] & 0xef) == DISC; |
| 421 | } |
| 422 | |
| 423 | inline int |
| 424 | IsRR(u_char *data, struct layer2 *l2) |
| 425 | { |
| 426 | if (test_bit(FLG_MOD128, &l2->flag)) |
| 427 | return data[0] == RR; |
| 428 | else |
| 429 | return (data[0] & 0xf) == 1; |
| 430 | } |
| 431 | |
| 432 | inline int |
| 433 | IsSFrame(u_char *data, struct layer2 *l2) |
| 434 | { |
| 435 | register u_char d = *data; |
| 436 | |
| 437 | if (!test_bit(FLG_MOD128, &l2->flag)) |
| 438 | d &= 0xf; |
| 439 | return ((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c); |
| 440 | } |
| 441 | |
| 442 | inline int |
| 443 | IsSABME(u_char *data, struct layer2 *l2) |
| 444 | { |
| 445 | u_char d = data[0] & ~0x10; |
| 446 | |
| 447 | return test_bit(FLG_MOD128, &l2->flag) ? d == SABME : d == SABM; |
| 448 | } |
| 449 | |
| 450 | inline int |
| 451 | IsREJ(u_char *data, struct layer2 *l2) |
| 452 | { |
| 453 | return test_bit(FLG_MOD128, &l2->flag) ? |
| 454 | data[0] == REJ : (data[0] & 0xf) == REJ; |
| 455 | } |
| 456 | |
| 457 | inline int |
| 458 | IsFRMR(u_char *data) |
| 459 | { |
| 460 | return (data[0] & 0xef) == FRMR; |
| 461 | } |
| 462 | |
| 463 | inline int |
| 464 | IsRNR(u_char *data, struct layer2 *l2) |
| 465 | { |
| 466 | return test_bit(FLG_MOD128, &l2->flag) ? |
| 467 | data[0] == RNR : (data[0] & 0xf) == RNR; |
| 468 | } |
| 469 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 470 | static int |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 471 | iframe_error(struct layer2 *l2, struct sk_buff *skb) |
| 472 | { |
| 473 | u_int i; |
| 474 | int rsp = *skb->data & 0x2; |
| 475 | |
| 476 | i = l2addrsize(l2) + (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1); |
| 477 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 478 | rsp = !rsp; |
| 479 | if (rsp) |
| 480 | return 'L'; |
| 481 | if (skb->len < i) |
| 482 | return 'N'; |
| 483 | if ((skb->len - i) > l2->maxlen) |
| 484 | return 'O'; |
| 485 | return 0; |
| 486 | } |
| 487 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 488 | static int |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 489 | super_error(struct layer2 *l2, struct sk_buff *skb) |
| 490 | { |
| 491 | if (skb->len != l2addrsize(l2) + |
| 492 | (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1)) |
| 493 | return 'N'; |
| 494 | return 0; |
| 495 | } |
| 496 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 497 | static int |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 498 | unnum_error(struct layer2 *l2, struct sk_buff *skb, int wantrsp) |
| 499 | { |
| 500 | int rsp = (*skb->data & 0x2) >> 1; |
| 501 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 502 | rsp = !rsp; |
| 503 | if (rsp != wantrsp) |
| 504 | return 'L'; |
| 505 | if (skb->len != l2addrsize(l2) + 1) |
| 506 | return 'N'; |
| 507 | return 0; |
| 508 | } |
| 509 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 510 | static int |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 511 | UI_error(struct layer2 *l2, struct sk_buff *skb) |
| 512 | { |
| 513 | int rsp = *skb->data & 0x2; |
| 514 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 515 | rsp = !rsp; |
| 516 | if (rsp) |
| 517 | return 'L'; |
| 518 | if (skb->len > l2->maxlen + l2addrsize(l2) + 1) |
| 519 | return 'O'; |
| 520 | return 0; |
| 521 | } |
| 522 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 523 | static int |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 524 | FRMR_error(struct layer2 *l2, struct sk_buff *skb) |
| 525 | { |
| 526 | u_int headers = l2addrsize(l2) + 1; |
| 527 | u_char *datap = skb->data + headers; |
| 528 | int rsp = *skb->data & 0x2; |
| 529 | |
| 530 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 531 | rsp = !rsp; |
| 532 | if (!rsp) |
| 533 | return 'L'; |
| 534 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 535 | if (skb->len < headers + 5) |
| 536 | return 'N'; |
| 537 | else if (*debug & DEBUG_L2) |
| 538 | l2m_debug(&l2->l2m, |
| 539 | "FRMR information %2x %2x %2x %2x %2x", |
| 540 | datap[0], datap[1], datap[2], datap[3], datap[4]); |
| 541 | } else { |
| 542 | if (skb->len < headers + 3) |
| 543 | return 'N'; |
| 544 | else if (*debug & DEBUG_L2) |
| 545 | l2m_debug(&l2->l2m, |
| 546 | "FRMR information %2x %2x %2x", |
| 547 | datap[0], datap[1], datap[2]); |
| 548 | } |
| 549 | return 0; |
| 550 | } |
| 551 | |
| 552 | static unsigned int |
| 553 | legalnr(struct layer2 *l2, unsigned int nr) |
| 554 | { |
| 555 | if (test_bit(FLG_MOD128, &l2->flag)) |
| 556 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); |
| 557 | else |
| 558 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | setva(struct layer2 *l2, unsigned int nr) |
| 563 | { |
| 564 | struct sk_buff *skb; |
| 565 | |
| 566 | while (l2->va != nr) { |
| 567 | l2->va++; |
| 568 | if (test_bit(FLG_MOD128, &l2->flag)) |
| 569 | l2->va %= 128; |
| 570 | else |
| 571 | l2->va %= 8; |
| 572 | if (l2->windowar[l2->sow]) { |
| 573 | skb_trim(l2->windowar[l2->sow], 0); |
| 574 | skb_queue_tail(&l2->tmp_queue, l2->windowar[l2->sow]); |
| 575 | l2->windowar[l2->sow] = NULL; |
| 576 | } |
| 577 | l2->sow = (l2->sow + 1) % l2->window; |
| 578 | } |
| 579 | skb = skb_dequeue(&l2->tmp_queue); |
| 580 | while (skb) { |
| 581 | dev_kfree_skb(skb); |
| 582 | skb = skb_dequeue(&l2->tmp_queue); |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | static void |
| 587 | send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr) |
| 588 | { |
| 589 | u_char tmp[MAX_L2HEADER_LEN]; |
| 590 | int i; |
| 591 | |
| 592 | i = sethdraddr(l2, tmp, cr); |
| 593 | tmp[i++] = cmd; |
| 594 | if (skb) |
| 595 | skb_trim(skb, 0); |
| 596 | else { |
| 597 | skb = mI_alloc_skb(i, GFP_ATOMIC); |
| 598 | if (!skb) { |
| 599 | printk(KERN_WARNING "%s: can't alloc skbuff\n", |
| 600 | __func__); |
| 601 | return; |
| 602 | } |
| 603 | } |
| 604 | memcpy(skb_put(skb, i), tmp, i); |
| 605 | enqueue_super(l2, skb); |
| 606 | } |
| 607 | |
| 608 | |
| 609 | inline u_char |
| 610 | get_PollFlag(struct layer2 *l2, struct sk_buff *skb) |
| 611 | { |
| 612 | return skb->data[l2addrsize(l2)] & 0x10; |
| 613 | } |
| 614 | |
| 615 | inline u_char |
| 616 | get_PollFlagFree(struct layer2 *l2, struct sk_buff *skb) |
| 617 | { |
| 618 | u_char PF; |
| 619 | |
| 620 | PF = get_PollFlag(l2, skb); |
| 621 | dev_kfree_skb(skb); |
| 622 | return PF; |
| 623 | } |
| 624 | |
| 625 | inline void |
| 626 | start_t200(struct layer2 *l2, int i) |
| 627 | { |
| 628 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); |
| 629 | test_and_set_bit(FLG_T200_RUN, &l2->flag); |
| 630 | } |
| 631 | |
| 632 | inline void |
| 633 | restart_t200(struct layer2 *l2, int i) |
| 634 | { |
| 635 | mISDN_FsmRestartTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); |
| 636 | test_and_set_bit(FLG_T200_RUN, &l2->flag); |
| 637 | } |
| 638 | |
| 639 | inline void |
| 640 | stop_t200(struct layer2 *l2, int i) |
| 641 | { |
| 642 | if (test_and_clear_bit(FLG_T200_RUN, &l2->flag)) |
| 643 | mISDN_FsmDelTimer(&l2->t200, i); |
| 644 | } |
| 645 | |
| 646 | inline void |
| 647 | st5_dl_release_l2l3(struct layer2 *l2) |
| 648 | { |
| 649 | int pr; |
| 650 | |
| 651 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) |
| 652 | pr = DL_RELEASE_CNF; |
| 653 | else |
| 654 | pr = DL_RELEASE_IND; |
| 655 | l2up_create(l2, pr, 0, NULL); |
| 656 | } |
| 657 | |
| 658 | inline void |
| 659 | lapb_dl_release_l2l3(struct layer2 *l2, int f) |
| 660 | { |
| 661 | if (test_bit(FLG_LAPB, &l2->flag)) |
| 662 | l2down_create(l2, PH_DEACTIVATE_REQ, l2_newid(l2), 0, NULL); |
| 663 | l2up_create(l2, f, 0, NULL); |
| 664 | } |
| 665 | |
| 666 | static void |
| 667 | establishlink(struct FsmInst *fi) |
| 668 | { |
| 669 | struct layer2 *l2 = fi->userdata; |
| 670 | u_char cmd; |
| 671 | |
| 672 | clear_exception(l2); |
| 673 | l2->rc = 0; |
| 674 | cmd = (test_bit(FLG_MOD128, &l2->flag) ? SABME : SABM) | 0x10; |
| 675 | send_uframe(l2, NULL, cmd, CMD); |
| 676 | mISDN_FsmDelTimer(&l2->t203, 1); |
| 677 | restart_t200(l2, 1); |
| 678 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); |
| 679 | freewin(l2); |
| 680 | mISDN_FsmChangeState(fi, ST_L2_5); |
| 681 | } |
| 682 | |
| 683 | static void |
| 684 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) |
| 685 | { |
| 686 | struct sk_buff *skb = arg; |
| 687 | struct layer2 *l2 = fi->userdata; |
| 688 | |
| 689 | if (get_PollFlagFree(l2, skb)) |
| 690 | l2mgr(l2, MDL_ERROR_IND, (void *) 'C'); |
| 691 | else |
| 692 | l2mgr(l2, MDL_ERROR_IND, (void *) 'D'); |
| 693 | |
| 694 | } |
| 695 | |
| 696 | static void |
| 697 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) |
| 698 | { |
| 699 | struct sk_buff *skb = arg; |
| 700 | struct layer2 *l2 = fi->userdata; |
| 701 | |
| 702 | if (get_PollFlagFree(l2, skb)) |
| 703 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); |
| 704 | else { |
| 705 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); |
| 706 | establishlink(fi); |
| 707 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | static void |
| 712 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) |
| 713 | { |
| 714 | struct sk_buff *skb = arg; |
| 715 | struct layer2 *l2 = fi->userdata; |
| 716 | |
| 717 | if (get_PollFlagFree(l2, skb)) |
| 718 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); |
| 719 | else |
| 720 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); |
| 721 | establishlink(fi); |
| 722 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); |
| 723 | } |
| 724 | |
| 725 | static void |
| 726 | l2_go_st3(struct FsmInst *fi, int event, void *arg) |
| 727 | { |
| 728 | dev_kfree_skb((struct sk_buff *)arg); |
| 729 | mISDN_FsmChangeState(fi, ST_L2_3); |
| 730 | } |
| 731 | |
| 732 | static void |
| 733 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) |
| 734 | { |
| 735 | struct layer2 *l2 = fi->userdata; |
| 736 | |
| 737 | mISDN_FsmChangeState(fi, ST_L2_3); |
| 738 | dev_kfree_skb((struct sk_buff *)arg); |
| 739 | l2_tei(l2, MDL_ASSIGN_IND, 0); |
| 740 | } |
| 741 | |
| 742 | static void |
| 743 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) |
| 744 | { |
| 745 | struct layer2 *l2 = fi->userdata; |
| 746 | struct sk_buff *skb = arg; |
| 747 | |
| 748 | skb_queue_tail(&l2->ui_queue, skb); |
| 749 | mISDN_FsmChangeState(fi, ST_L2_2); |
| 750 | l2_tei(l2, MDL_ASSIGN_IND, 0); |
| 751 | } |
| 752 | |
| 753 | static void |
| 754 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) |
| 755 | { |
| 756 | struct layer2 *l2 = fi->userdata; |
| 757 | struct sk_buff *skb = arg; |
| 758 | |
| 759 | skb_queue_tail(&l2->ui_queue, skb); |
| 760 | } |
| 761 | |
| 762 | static void |
| 763 | tx_ui(struct layer2 *l2) |
| 764 | { |
| 765 | struct sk_buff *skb; |
| 766 | u_char header[MAX_L2HEADER_LEN]; |
| 767 | int i; |
| 768 | |
| 769 | i = sethdraddr(l2, header, CMD); |
| 770 | if (test_bit(FLG_LAPD_NET, &l2->flag)) |
| 771 | header[1] = 0xff; /* tei 127 */ |
| 772 | header[i++] = UI; |
| 773 | while ((skb = skb_dequeue(&l2->ui_queue))) { |
| 774 | memcpy(skb_push(skb, i), header, i); |
| 775 | enqueue_ui(l2, skb); |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | static void |
| 780 | l2_send_ui(struct FsmInst *fi, int event, void *arg) |
| 781 | { |
| 782 | struct layer2 *l2 = fi->userdata; |
| 783 | struct sk_buff *skb = arg; |
| 784 | |
| 785 | skb_queue_tail(&l2->ui_queue, skb); |
| 786 | tx_ui(l2); |
| 787 | } |
| 788 | |
| 789 | static void |
| 790 | l2_got_ui(struct FsmInst *fi, int event, void *arg) |
| 791 | { |
| 792 | struct layer2 *l2 = fi->userdata; |
| 793 | struct sk_buff *skb = arg; |
| 794 | |
| 795 | skb_pull(skb, l2headersize(l2, 1)); |
| 796 | /* |
| 797 | * in states 1-3 for broadcast |
| 798 | */ |
| 799 | |
| 800 | if (l2->tm) |
| 801 | l2_tei(l2, MDL_STATUS_UI_IND, 0); |
| 802 | l2up(l2, DL_UNITDATA_IND, skb); |
| 803 | } |
| 804 | |
| 805 | static void |
| 806 | l2_establish(struct FsmInst *fi, int event, void *arg) |
| 807 | { |
| 808 | struct sk_buff *skb = arg; |
| 809 | struct layer2 *l2 = fi->userdata; |
| 810 | |
| 811 | establishlink(fi); |
| 812 | test_and_set_bit(FLG_L3_INIT, &l2->flag); |
| 813 | dev_kfree_skb(skb); |
| 814 | } |
| 815 | |
| 816 | static void |
| 817 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) |
| 818 | { |
| 819 | struct sk_buff *skb = arg; |
| 820 | struct layer2 *l2 = fi->userdata; |
| 821 | |
| 822 | skb_queue_purge(&l2->i_queue); |
| 823 | test_and_set_bit(FLG_L3_INIT, &l2->flag); |
| 824 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); |
| 825 | dev_kfree_skb(skb); |
| 826 | } |
| 827 | |
| 828 | static void |
| 829 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) |
| 830 | { |
| 831 | struct sk_buff *skb = arg; |
| 832 | struct layer2 *l2 = fi->userdata; |
| 833 | |
| 834 | skb_queue_purge(&l2->i_queue); |
| 835 | establishlink(fi); |
| 836 | test_and_set_bit(FLG_L3_INIT, &l2->flag); |
| 837 | dev_kfree_skb(skb); |
| 838 | } |
| 839 | |
| 840 | static void |
| 841 | l2_release(struct FsmInst *fi, int event, void *arg) |
| 842 | { |
| 843 | struct layer2 *l2 = fi->userdata; |
| 844 | struct sk_buff *skb = arg; |
| 845 | |
| 846 | skb_trim(skb, 0); |
| 847 | l2up(l2, DL_RELEASE_CNF, skb); |
| 848 | } |
| 849 | |
| 850 | static void |
| 851 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) |
| 852 | { |
| 853 | struct sk_buff *skb = arg; |
| 854 | struct layer2 *l2 = fi->userdata; |
| 855 | |
| 856 | test_and_set_bit(FLG_PEND_REL, &l2->flag); |
| 857 | dev_kfree_skb(skb); |
| 858 | } |
| 859 | |
| 860 | static void |
| 861 | l2_disconnect(struct FsmInst *fi, int event, void *arg) |
| 862 | { |
| 863 | struct layer2 *l2 = fi->userdata; |
| 864 | struct sk_buff *skb = arg; |
| 865 | |
| 866 | skb_queue_purge(&l2->i_queue); |
| 867 | freewin(l2); |
| 868 | mISDN_FsmChangeState(fi, ST_L2_6); |
| 869 | l2->rc = 0; |
| 870 | send_uframe(l2, NULL, DISC | 0x10, CMD); |
| 871 | mISDN_FsmDelTimer(&l2->t203, 1); |
| 872 | restart_t200(l2, 2); |
| 873 | if (skb) |
| 874 | dev_kfree_skb(skb); |
| 875 | } |
| 876 | |
| 877 | static void |
| 878 | l2_start_multi(struct FsmInst *fi, int event, void *arg) |
| 879 | { |
| 880 | struct layer2 *l2 = fi->userdata; |
| 881 | struct sk_buff *skb = arg; |
| 882 | |
| 883 | l2->vs = 0; |
| 884 | l2->va = 0; |
| 885 | l2->vr = 0; |
| 886 | l2->sow = 0; |
| 887 | clear_exception(l2); |
| 888 | send_uframe(l2, NULL, UA | get_PollFlag(l2, skb), RSP); |
| 889 | mISDN_FsmChangeState(fi, ST_L2_7); |
| 890 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); |
| 891 | skb_trim(skb, 0); |
| 892 | l2up(l2, DL_ESTABLISH_IND, skb); |
| 893 | if (l2->tm) |
| 894 | l2_tei(l2, MDL_STATUS_UP_IND, 0); |
| 895 | } |
| 896 | |
| 897 | static void |
| 898 | l2_send_UA(struct FsmInst *fi, int event, void *arg) |
| 899 | { |
| 900 | struct layer2 *l2 = fi->userdata; |
| 901 | struct sk_buff *skb = arg; |
| 902 | |
| 903 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); |
| 904 | } |
| 905 | |
| 906 | static void |
| 907 | l2_send_DM(struct FsmInst *fi, int event, void *arg) |
| 908 | { |
| 909 | struct layer2 *l2 = fi->userdata; |
| 910 | struct sk_buff *skb = arg; |
| 911 | |
| 912 | send_uframe(l2, skb, DM | get_PollFlag(l2, skb), RSP); |
| 913 | } |
| 914 | |
| 915 | static void |
| 916 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) |
| 917 | { |
| 918 | struct layer2 *l2 = fi->userdata; |
| 919 | struct sk_buff *skb = arg; |
| 920 | int est = 0; |
| 921 | |
| 922 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); |
| 923 | |
| 924 | l2mgr(l2, MDL_ERROR_IND, (void *) 'F'); |
| 925 | |
| 926 | if (l2->vs != l2->va) { |
| 927 | skb_queue_purge(&l2->i_queue); |
| 928 | est = 1; |
| 929 | } |
| 930 | |
| 931 | clear_exception(l2); |
| 932 | l2->vs = 0; |
| 933 | l2->va = 0; |
| 934 | l2->vr = 0; |
| 935 | l2->sow = 0; |
| 936 | mISDN_FsmChangeState(fi, ST_L2_7); |
| 937 | stop_t200(l2, 3); |
| 938 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); |
| 939 | |
| 940 | if (est) |
| 941 | l2up_create(l2, DL_ESTABLISH_IND, 0, NULL); |
| 942 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, |
| 943 | * MGR_SHORTSTATUS | INDICATION, SSTATUS_L2_ESTABLISHED, |
| 944 | * 0, NULL, 0); |
| 945 | */ |
| 946 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) |
| 947 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); |
| 948 | } |
| 949 | |
| 950 | static void |
| 951 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) |
| 952 | { |
| 953 | struct layer2 *l2 = fi->userdata; |
| 954 | struct sk_buff *skb = arg; |
| 955 | |
| 956 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 957 | mISDN_FsmDelTimer(&l2->t203, 3); |
| 958 | stop_t200(l2, 4); |
| 959 | |
| 960 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); |
| 961 | skb_queue_purge(&l2->i_queue); |
| 962 | freewin(l2); |
| 963 | lapb_dl_release_l2l3(l2, DL_RELEASE_IND); |
| 964 | if (l2->tm) |
| 965 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 966 | } |
| 967 | |
| 968 | static void |
| 969 | l2_connected(struct FsmInst *fi, int event, void *arg) |
| 970 | { |
| 971 | struct layer2 *l2 = fi->userdata; |
| 972 | struct sk_buff *skb = arg; |
| 973 | int pr = -1; |
| 974 | |
| 975 | if (!get_PollFlag(l2, skb)) { |
| 976 | l2_mdl_error_ua(fi, event, arg); |
| 977 | return; |
| 978 | } |
| 979 | dev_kfree_skb(skb); |
| 980 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) |
| 981 | l2_disconnect(fi, event, NULL); |
| 982 | if (test_and_clear_bit(FLG_L3_INIT, &l2->flag)) { |
| 983 | pr = DL_ESTABLISH_CNF; |
| 984 | } else if (l2->vs != l2->va) { |
| 985 | skb_queue_purge(&l2->i_queue); |
| 986 | pr = DL_ESTABLISH_IND; |
| 987 | } |
| 988 | stop_t200(l2, 5); |
| 989 | l2->vr = 0; |
| 990 | l2->vs = 0; |
| 991 | l2->va = 0; |
| 992 | l2->sow = 0; |
| 993 | mISDN_FsmChangeState(fi, ST_L2_7); |
| 994 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 4); |
| 995 | if (pr != -1) |
| 996 | l2up_create(l2, pr, 0, NULL); |
| 997 | |
| 998 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) |
| 999 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); |
| 1000 | |
| 1001 | if (l2->tm) |
| 1002 | l2_tei(l2, MDL_STATUS_UP_IND, 0); |
| 1003 | } |
| 1004 | |
| 1005 | static void |
| 1006 | l2_released(struct FsmInst *fi, int event, void *arg) |
| 1007 | { |
| 1008 | struct layer2 *l2 = fi->userdata; |
| 1009 | struct sk_buff *skb = arg; |
| 1010 | |
| 1011 | if (!get_PollFlag(l2, skb)) { |
| 1012 | l2_mdl_error_ua(fi, event, arg); |
| 1013 | return; |
| 1014 | } |
| 1015 | dev_kfree_skb(skb); |
| 1016 | stop_t200(l2, 6); |
| 1017 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); |
| 1018 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1019 | if (l2->tm) |
| 1020 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1021 | } |
| 1022 | |
| 1023 | static void |
| 1024 | l2_reestablish(struct FsmInst *fi, int event, void *arg) |
| 1025 | { |
| 1026 | struct layer2 *l2 = fi->userdata; |
| 1027 | struct sk_buff *skb = arg; |
| 1028 | |
| 1029 | if (!get_PollFlagFree(l2, skb)) { |
| 1030 | establishlink(fi); |
| 1031 | test_and_set_bit(FLG_L3_INIT, &l2->flag); |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | static void |
| 1036 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) |
| 1037 | { |
| 1038 | struct layer2 *l2 = fi->userdata; |
| 1039 | struct sk_buff *skb = arg; |
| 1040 | |
| 1041 | if (get_PollFlagFree(l2, skb)) { |
| 1042 | stop_t200(l2, 7); |
| 1043 | if (!test_bit(FLG_L3_INIT, &l2->flag)) |
| 1044 | skb_queue_purge(&l2->i_queue); |
| 1045 | if (test_bit(FLG_LAPB, &l2->flag)) |
| 1046 | l2down_create(l2, PH_DEACTIVATE_REQ, |
| 1047 | l2_newid(l2), 0, NULL); |
| 1048 | st5_dl_release_l2l3(l2); |
| 1049 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1050 | if (l2->tm) |
| 1051 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | static void |
| 1056 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) |
| 1057 | { |
| 1058 | struct layer2 *l2 = fi->userdata; |
| 1059 | struct sk_buff *skb = arg; |
| 1060 | |
| 1061 | if (get_PollFlagFree(l2, skb)) { |
| 1062 | stop_t200(l2, 8); |
| 1063 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); |
| 1064 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1065 | if (l2->tm) |
| 1066 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1067 | } |
| 1068 | } |
| 1069 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 1070 | static void |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 1071 | enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf) |
| 1072 | { |
| 1073 | struct sk_buff *skb; |
| 1074 | u_char tmp[MAX_L2HEADER_LEN]; |
| 1075 | int i; |
| 1076 | |
| 1077 | i = sethdraddr(l2, tmp, cr); |
| 1078 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1079 | tmp[i++] = typ; |
| 1080 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); |
| 1081 | } else |
| 1082 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); |
| 1083 | skb = mI_alloc_skb(i, GFP_ATOMIC); |
| 1084 | if (!skb) { |
| 1085 | printk(KERN_WARNING |
| 1086 | "isdnl2 can't alloc sbbuff for enquiry_cr\n"); |
| 1087 | return; |
| 1088 | } |
| 1089 | memcpy(skb_put(skb, i), tmp, i); |
| 1090 | enqueue_super(l2, skb); |
| 1091 | } |
| 1092 | |
| 1093 | inline void |
| 1094 | enquiry_response(struct layer2 *l2) |
| 1095 | { |
| 1096 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) |
| 1097 | enquiry_cr(l2, RNR, RSP, 1); |
| 1098 | else |
| 1099 | enquiry_cr(l2, RR, RSP, 1); |
| 1100 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1101 | } |
| 1102 | |
| 1103 | inline void |
| 1104 | transmit_enquiry(struct layer2 *l2) |
| 1105 | { |
| 1106 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) |
| 1107 | enquiry_cr(l2, RNR, CMD, 1); |
| 1108 | else |
| 1109 | enquiry_cr(l2, RR, CMD, 1); |
| 1110 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1111 | start_t200(l2, 9); |
| 1112 | } |
| 1113 | |
| 1114 | |
| 1115 | static void |
| 1116 | nrerrorrecovery(struct FsmInst *fi) |
| 1117 | { |
| 1118 | struct layer2 *l2 = fi->userdata; |
| 1119 | |
| 1120 | l2mgr(l2, MDL_ERROR_IND, (void *) 'J'); |
| 1121 | establishlink(fi); |
| 1122 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); |
| 1123 | } |
| 1124 | |
| 1125 | static void |
| 1126 | invoke_retransmission(struct layer2 *l2, unsigned int nr) |
| 1127 | { |
| 1128 | u_int p1; |
| 1129 | |
| 1130 | if (l2->vs != nr) { |
| 1131 | while (l2->vs != nr) { |
| 1132 | (l2->vs)--; |
| 1133 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1134 | l2->vs %= 128; |
| 1135 | p1 = (l2->vs - l2->va) % 128; |
| 1136 | } else { |
| 1137 | l2->vs %= 8; |
| 1138 | p1 = (l2->vs - l2->va) % 8; |
| 1139 | } |
| 1140 | p1 = (p1 + l2->sow) % l2->window; |
| 1141 | if (l2->windowar[p1]) |
| 1142 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); |
| 1143 | else |
| 1144 | printk(KERN_WARNING |
| 1145 | "%s: windowar[%d] is NULL\n", |
| 1146 | __func__, p1); |
| 1147 | l2->windowar[p1] = NULL; |
| 1148 | } |
| 1149 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); |
| 1150 | } |
| 1151 | } |
| 1152 | |
| 1153 | static void |
| 1154 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) |
| 1155 | { |
| 1156 | struct layer2 *l2 = fi->userdata; |
| 1157 | struct sk_buff *skb = arg; |
| 1158 | int PollFlag, rsp, typ = RR; |
| 1159 | unsigned int nr; |
| 1160 | |
| 1161 | rsp = *skb->data & 0x2; |
| 1162 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 1163 | rsp = !rsp; |
| 1164 | |
| 1165 | skb_pull(skb, l2addrsize(l2)); |
| 1166 | if (IsRNR(skb->data, l2)) { |
| 1167 | set_peer_busy(l2); |
| 1168 | typ = RNR; |
| 1169 | } else |
| 1170 | clear_peer_busy(l2); |
| 1171 | if (IsREJ(skb->data, l2)) |
| 1172 | typ = REJ; |
| 1173 | |
| 1174 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1175 | PollFlag = (skb->data[1] & 0x1) == 0x1; |
| 1176 | nr = skb->data[1] >> 1; |
| 1177 | } else { |
| 1178 | PollFlag = (skb->data[0] & 0x10); |
| 1179 | nr = (skb->data[0] >> 5) & 0x7; |
| 1180 | } |
| 1181 | dev_kfree_skb(skb); |
| 1182 | |
| 1183 | if (PollFlag) { |
| 1184 | if (rsp) |
| 1185 | l2mgr(l2, MDL_ERROR_IND, (void *) 'A'); |
| 1186 | else |
| 1187 | enquiry_response(l2); |
| 1188 | } |
| 1189 | if (legalnr(l2, nr)) { |
| 1190 | if (typ == REJ) { |
| 1191 | setva(l2, nr); |
| 1192 | invoke_retransmission(l2, nr); |
| 1193 | stop_t200(l2, 10); |
| 1194 | if (mISDN_FsmAddTimer(&l2->t203, l2->T203, |
| 1195 | EV_L2_T203, NULL, 6)) |
| 1196 | l2m_debug(&l2->l2m, "Restart T203 ST7 REJ"); |
| 1197 | } else if ((nr == l2->vs) && (typ == RR)) { |
| 1198 | setva(l2, nr); |
| 1199 | stop_t200(l2, 11); |
| 1200 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, |
| 1201 | EV_L2_T203, NULL, 7); |
| 1202 | } else if ((l2->va != nr) || (typ == RNR)) { |
| 1203 | setva(l2, nr); |
| 1204 | if (typ != RR) |
| 1205 | mISDN_FsmDelTimer(&l2->t203, 9); |
| 1206 | restart_t200(l2, 12); |
| 1207 | } |
| 1208 | if (skb_queue_len(&l2->i_queue) && (typ == RR)) |
| 1209 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); |
| 1210 | } else |
| 1211 | nrerrorrecovery(fi); |
| 1212 | } |
| 1213 | |
| 1214 | static void |
| 1215 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) |
| 1216 | { |
| 1217 | struct layer2 *l2 = fi->userdata; |
| 1218 | struct sk_buff *skb = arg; |
| 1219 | |
| 1220 | if (!test_bit(FLG_L3_INIT, &l2->flag)) |
| 1221 | skb_queue_tail(&l2->i_queue, skb); |
| 1222 | else |
| 1223 | dev_kfree_skb(skb); |
| 1224 | } |
| 1225 | |
| 1226 | static void |
| 1227 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) |
| 1228 | { |
| 1229 | struct layer2 *l2 = fi->userdata; |
| 1230 | struct sk_buff *skb = arg; |
| 1231 | |
| 1232 | skb_queue_tail(&l2->i_queue, skb); |
| 1233 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); |
| 1234 | } |
| 1235 | |
| 1236 | static void |
| 1237 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) |
| 1238 | { |
| 1239 | struct layer2 *l2 = fi->userdata; |
| 1240 | struct sk_buff *skb = arg; |
| 1241 | |
| 1242 | skb_queue_tail(&l2->i_queue, skb); |
| 1243 | } |
| 1244 | |
| 1245 | static void |
| 1246 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) |
| 1247 | { |
| 1248 | struct layer2 *l2 = fi->userdata; |
| 1249 | struct sk_buff *skb = arg; |
| 1250 | int PollFlag, i; |
| 1251 | u_int ns, nr; |
| 1252 | |
| 1253 | i = l2addrsize(l2); |
| 1254 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1255 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); |
| 1256 | ns = skb->data[i] >> 1; |
| 1257 | nr = (skb->data[i + 1] >> 1) & 0x7f; |
| 1258 | } else { |
| 1259 | PollFlag = (skb->data[i] & 0x10); |
| 1260 | ns = (skb->data[i] >> 1) & 0x7; |
| 1261 | nr = (skb->data[i] >> 5) & 0x7; |
| 1262 | } |
| 1263 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { |
| 1264 | dev_kfree_skb(skb); |
| 1265 | if (PollFlag) |
| 1266 | enquiry_response(l2); |
| 1267 | } else { |
| 1268 | if (l2->vr == ns) { |
| 1269 | l2->vr++; |
| 1270 | if (test_bit(FLG_MOD128, &l2->flag)) |
| 1271 | l2->vr %= 128; |
| 1272 | else |
| 1273 | l2->vr %= 8; |
| 1274 | test_and_clear_bit(FLG_REJEXC, &l2->flag); |
| 1275 | if (PollFlag) |
| 1276 | enquiry_response(l2); |
| 1277 | else |
| 1278 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); |
| 1279 | skb_pull(skb, l2headersize(l2, 0)); |
| 1280 | l2up(l2, DL_DATA_IND, skb); |
| 1281 | } else { |
| 1282 | /* n(s)!=v(r) */ |
| 1283 | dev_kfree_skb(skb); |
| 1284 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { |
| 1285 | if (PollFlag) |
| 1286 | enquiry_response(l2); |
| 1287 | } else { |
| 1288 | enquiry_cr(l2, REJ, RSP, PollFlag); |
| 1289 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1290 | } |
| 1291 | } |
| 1292 | } |
| 1293 | if (legalnr(l2, nr)) { |
| 1294 | if (!test_bit(FLG_PEER_BUSY, &l2->flag) && |
| 1295 | (fi->state == ST_L2_7)) { |
| 1296 | if (nr == l2->vs) { |
| 1297 | stop_t200(l2, 13); |
| 1298 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, |
| 1299 | EV_L2_T203, NULL, 7); |
| 1300 | } else if (nr != l2->va) |
| 1301 | restart_t200(l2, 14); |
| 1302 | } |
| 1303 | setva(l2, nr); |
| 1304 | } else { |
| 1305 | nrerrorrecovery(fi); |
| 1306 | return; |
| 1307 | } |
| 1308 | if (skb_queue_len(&l2->i_queue) && (fi->state == ST_L2_7)) |
| 1309 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); |
| 1310 | if (test_and_clear_bit(FLG_ACK_PEND, &l2->flag)) |
| 1311 | enquiry_cr(l2, RR, RSP, 0); |
| 1312 | } |
| 1313 | |
| 1314 | static void |
| 1315 | l2_got_tei(struct FsmInst *fi, int event, void *arg) |
| 1316 | { |
| 1317 | struct layer2 *l2 = fi->userdata; |
| 1318 | u_int info; |
| 1319 | |
| 1320 | l2->tei = (signed char)(long)arg; |
| 1321 | set_channel_address(&l2->ch, l2->sapi, l2->tei); |
| 1322 | info = DL_INFO_L2_CONNECT; |
| 1323 | l2up_create(l2, DL_INFORMATION_IND, sizeof(info), &info); |
| 1324 | if (fi->state == ST_L2_3) { |
| 1325 | establishlink(fi); |
| 1326 | test_and_set_bit(FLG_L3_INIT, &l2->flag); |
| 1327 | } else |
| 1328 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1329 | if (skb_queue_len(&l2->ui_queue)) |
| 1330 | tx_ui(l2); |
| 1331 | } |
| 1332 | |
| 1333 | static void |
| 1334 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1335 | { |
| 1336 | struct layer2 *l2 = fi->userdata; |
| 1337 | |
| 1338 | if (test_bit(FLG_LAPD, &l2->flag) && |
| 1339 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
| 1340 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
| 1341 | } else if (l2->rc == l2->N200) { |
| 1342 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1343 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); |
| 1344 | skb_queue_purge(&l2->i_queue); |
| 1345 | l2mgr(l2, MDL_ERROR_IND, (void *) 'G'); |
| 1346 | if (test_bit(FLG_LAPB, &l2->flag)) |
| 1347 | l2down_create(l2, PH_DEACTIVATE_REQ, |
| 1348 | l2_newid(l2), 0, NULL); |
| 1349 | st5_dl_release_l2l3(l2); |
| 1350 | if (l2->tm) |
| 1351 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1352 | } else { |
| 1353 | l2->rc++; |
| 1354 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
| 1355 | send_uframe(l2, NULL, (test_bit(FLG_MOD128, &l2->flag) ? |
| 1356 | SABME : SABM) | 0x10, CMD); |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | static void |
| 1361 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1362 | { |
| 1363 | struct layer2 *l2 = fi->userdata; |
| 1364 | |
| 1365 | if (test_bit(FLG_LAPD, &l2->flag) && |
| 1366 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
| 1367 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
| 1368 | } else if (l2->rc == l2->N200) { |
| 1369 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1370 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); |
| 1371 | l2mgr(l2, MDL_ERROR_IND, (void *) 'H'); |
| 1372 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); |
| 1373 | if (l2->tm) |
| 1374 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1375 | } else { |
| 1376 | l2->rc++; |
| 1377 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, |
| 1378 | NULL, 9); |
| 1379 | send_uframe(l2, NULL, DISC | 0x10, CMD); |
| 1380 | } |
| 1381 | } |
| 1382 | |
| 1383 | static void |
| 1384 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1385 | { |
| 1386 | struct layer2 *l2 = fi->userdata; |
| 1387 | |
| 1388 | if (test_bit(FLG_LAPD, &l2->flag) && |
| 1389 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
| 1390 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
| 1391 | return; |
| 1392 | } |
| 1393 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); |
| 1394 | l2->rc = 0; |
| 1395 | mISDN_FsmChangeState(fi, ST_L2_8); |
| 1396 | transmit_enquiry(l2); |
| 1397 | l2->rc++; |
| 1398 | } |
| 1399 | |
| 1400 | static void |
| 1401 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1402 | { |
| 1403 | struct layer2 *l2 = fi->userdata; |
| 1404 | |
| 1405 | if (test_bit(FLG_LAPD, &l2->flag) && |
| 1406 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
| 1407 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
| 1408 | return; |
| 1409 | } |
| 1410 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); |
| 1411 | if (l2->rc == l2->N200) { |
| 1412 | l2mgr(l2, MDL_ERROR_IND, (void *) 'I'); |
| 1413 | establishlink(fi); |
| 1414 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); |
| 1415 | } else { |
| 1416 | transmit_enquiry(l2); |
| 1417 | l2->rc++; |
| 1418 | } |
| 1419 | } |
| 1420 | |
| 1421 | static void |
| 1422 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) |
| 1423 | { |
| 1424 | struct layer2 *l2 = fi->userdata; |
| 1425 | |
| 1426 | if (test_bit(FLG_LAPD, &l2->flag) && |
| 1427 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
| 1428 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 9); |
| 1429 | return; |
| 1430 | } |
| 1431 | mISDN_FsmChangeState(fi, ST_L2_8); |
| 1432 | transmit_enquiry(l2); |
| 1433 | l2->rc = 0; |
| 1434 | } |
| 1435 | |
| 1436 | static void |
| 1437 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) |
| 1438 | { |
| 1439 | struct layer2 *l2 = fi->userdata; |
| 1440 | struct sk_buff *skb, *nskb, *oskb; |
| 1441 | u_char header[MAX_L2HEADER_LEN]; |
| 1442 | u_int i, p1; |
| 1443 | |
| 1444 | if (!cansend(l2)) |
| 1445 | return; |
| 1446 | |
| 1447 | skb = skb_dequeue(&l2->i_queue); |
| 1448 | if (!skb) |
| 1449 | return; |
| 1450 | |
| 1451 | if (test_bit(FLG_MOD128, &l2->flag)) |
| 1452 | p1 = (l2->vs - l2->va) % 128; |
| 1453 | else |
| 1454 | p1 = (l2->vs - l2->va) % 8; |
| 1455 | p1 = (p1 + l2->sow) % l2->window; |
| 1456 | if (l2->windowar[p1]) { |
| 1457 | printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n", |
| 1458 | p1); |
| 1459 | dev_kfree_skb(l2->windowar[p1]); |
| 1460 | } |
| 1461 | l2->windowar[p1] = skb; |
| 1462 | i = sethdraddr(l2, header, CMD); |
| 1463 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1464 | header[i++] = l2->vs << 1; |
| 1465 | header[i++] = l2->vr << 1; |
| 1466 | l2->vs = (l2->vs + 1) % 128; |
| 1467 | } else { |
| 1468 | header[i++] = (l2->vr << 5) | (l2->vs << 1); |
| 1469 | l2->vs = (l2->vs + 1) % 8; |
| 1470 | } |
| 1471 | |
| 1472 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 1473 | p1 = skb_headroom(nskb); |
| 1474 | if (p1 >= i) |
| 1475 | memcpy(skb_push(nskb, i), header, i); |
| 1476 | else { |
| 1477 | printk(KERN_WARNING |
| 1478 | "isdnl2 pull_iqueue skb header(%d/%d) too short\n", i, p1); |
| 1479 | oskb = nskb; |
| 1480 | nskb = mI_alloc_skb(oskb->len + i, GFP_ATOMIC); |
| 1481 | if (!nskb) { |
| 1482 | dev_kfree_skb(oskb); |
| 1483 | printk(KERN_WARNING "%s: no skb mem\n", __func__); |
| 1484 | return; |
| 1485 | } |
| 1486 | memcpy(skb_put(nskb, i), header, i); |
| 1487 | memcpy(skb_put(nskb, oskb->len), oskb->data, oskb->len); |
| 1488 | dev_kfree_skb(oskb); |
| 1489 | } |
| 1490 | l2down(l2, PH_DATA_REQ, l2_newid(l2), nskb); |
| 1491 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1492 | if (!test_and_set_bit(FLG_T200_RUN, &l2->flag)) { |
| 1493 | mISDN_FsmDelTimer(&l2->t203, 13); |
| 1494 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 11); |
| 1495 | } |
| 1496 | } |
| 1497 | |
| 1498 | static void |
| 1499 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) |
| 1500 | { |
| 1501 | struct layer2 *l2 = fi->userdata; |
| 1502 | struct sk_buff *skb = arg; |
| 1503 | int PollFlag, rsp, rnr = 0; |
| 1504 | unsigned int nr; |
| 1505 | |
| 1506 | rsp = *skb->data & 0x2; |
| 1507 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 1508 | rsp = !rsp; |
| 1509 | |
| 1510 | skb_pull(skb, l2addrsize(l2)); |
| 1511 | |
| 1512 | if (IsRNR(skb->data, l2)) { |
| 1513 | set_peer_busy(l2); |
| 1514 | rnr = 1; |
| 1515 | } else |
| 1516 | clear_peer_busy(l2); |
| 1517 | |
| 1518 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1519 | PollFlag = (skb->data[1] & 0x1) == 0x1; |
| 1520 | nr = skb->data[1] >> 1; |
| 1521 | } else { |
| 1522 | PollFlag = (skb->data[0] & 0x10); |
| 1523 | nr = (skb->data[0] >> 5) & 0x7; |
| 1524 | } |
| 1525 | dev_kfree_skb(skb); |
| 1526 | if (rsp && PollFlag) { |
| 1527 | if (legalnr(l2, nr)) { |
| 1528 | if (rnr) { |
| 1529 | restart_t200(l2, 15); |
| 1530 | } else { |
| 1531 | stop_t200(l2, 16); |
| 1532 | mISDN_FsmAddTimer(&l2->t203, l2->T203, |
| 1533 | EV_L2_T203, NULL, 5); |
| 1534 | setva(l2, nr); |
| 1535 | } |
| 1536 | invoke_retransmission(l2, nr); |
| 1537 | mISDN_FsmChangeState(fi, ST_L2_7); |
| 1538 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) |
| 1539 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); |
| 1540 | } else |
| 1541 | nrerrorrecovery(fi); |
| 1542 | } else { |
| 1543 | if (!rsp && PollFlag) |
| 1544 | enquiry_response(l2); |
| 1545 | if (legalnr(l2, nr)) |
| 1546 | setva(l2, nr); |
| 1547 | else |
| 1548 | nrerrorrecovery(fi); |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | static void |
| 1553 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) |
| 1554 | { |
| 1555 | struct layer2 *l2 = fi->userdata; |
| 1556 | struct sk_buff *skb = arg; |
| 1557 | |
| 1558 | skb_pull(skb, l2addrsize(l2) + 1); |
| 1559 | |
| 1560 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ |
| 1561 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { |
| 1562 | l2mgr(l2, MDL_ERROR_IND, (void *) 'K'); |
| 1563 | establishlink(fi); |
| 1564 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); |
| 1565 | } |
| 1566 | dev_kfree_skb(skb); |
| 1567 | } |
| 1568 | |
| 1569 | static void |
| 1570 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1571 | { |
| 1572 | struct layer2 *l2 = fi->userdata; |
| 1573 | |
| 1574 | skb_queue_purge(&l2->ui_queue); |
| 1575 | l2->tei = GROUP_TEI; |
| 1576 | mISDN_FsmChangeState(fi, ST_L2_1); |
| 1577 | } |
| 1578 | |
| 1579 | static void |
| 1580 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1581 | { |
| 1582 | struct layer2 *l2 = fi->userdata; |
| 1583 | |
| 1584 | skb_queue_purge(&l2->ui_queue); |
| 1585 | l2->tei = GROUP_TEI; |
| 1586 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); |
| 1587 | mISDN_FsmChangeState(fi, ST_L2_1); |
| 1588 | } |
| 1589 | |
| 1590 | static void |
| 1591 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1592 | { |
| 1593 | struct layer2 *l2 = fi->userdata; |
| 1594 | |
| 1595 | skb_queue_purge(&l2->i_queue); |
| 1596 | skb_queue_purge(&l2->ui_queue); |
| 1597 | freewin(l2); |
| 1598 | l2->tei = GROUP_TEI; |
| 1599 | stop_t200(l2, 17); |
| 1600 | st5_dl_release_l2l3(l2); |
| 1601 | mISDN_FsmChangeState(fi, ST_L2_1); |
| 1602 | } |
| 1603 | |
| 1604 | static void |
| 1605 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1606 | { |
| 1607 | struct layer2 *l2 = fi->userdata; |
| 1608 | |
| 1609 | skb_queue_purge(&l2->ui_queue); |
| 1610 | l2->tei = GROUP_TEI; |
| 1611 | stop_t200(l2, 18); |
| 1612 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); |
| 1613 | mISDN_FsmChangeState(fi, ST_L2_1); |
| 1614 | } |
| 1615 | |
| 1616 | static void |
| 1617 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1618 | { |
| 1619 | struct layer2 *l2 = fi->userdata; |
| 1620 | |
| 1621 | skb_queue_purge(&l2->i_queue); |
| 1622 | skb_queue_purge(&l2->ui_queue); |
| 1623 | freewin(l2); |
| 1624 | l2->tei = GROUP_TEI; |
| 1625 | stop_t200(l2, 17); |
| 1626 | mISDN_FsmDelTimer(&l2->t203, 19); |
| 1627 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); |
| 1628 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, |
| 1629 | * MGR_SHORTSTATUS_IND, SSTATUS_L2_RELEASED, |
| 1630 | * 0, NULL, 0); |
| 1631 | */ |
| 1632 | mISDN_FsmChangeState(fi, ST_L2_1); |
| 1633 | } |
| 1634 | |
| 1635 | static void |
| 1636 | l2_st14_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1637 | { |
| 1638 | struct layer2 *l2 = fi->userdata; |
| 1639 | struct sk_buff *skb = arg; |
| 1640 | |
| 1641 | skb_queue_purge(&l2->i_queue); |
| 1642 | skb_queue_purge(&l2->ui_queue); |
| 1643 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) |
| 1644 | l2up(l2, DL_RELEASE_IND, skb); |
| 1645 | else |
| 1646 | dev_kfree_skb(skb); |
| 1647 | } |
| 1648 | |
| 1649 | static void |
| 1650 | l2_st5_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1651 | { |
| 1652 | struct layer2 *l2 = fi->userdata; |
| 1653 | struct sk_buff *skb = arg; |
| 1654 | |
| 1655 | skb_queue_purge(&l2->i_queue); |
| 1656 | skb_queue_purge(&l2->ui_queue); |
| 1657 | freewin(l2); |
| 1658 | stop_t200(l2, 19); |
| 1659 | st5_dl_release_l2l3(l2); |
| 1660 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1661 | if (l2->tm) |
| 1662 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1663 | dev_kfree_skb(skb); |
| 1664 | } |
| 1665 | |
| 1666 | static void |
| 1667 | l2_st6_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1668 | { |
| 1669 | struct layer2 *l2 = fi->userdata; |
| 1670 | struct sk_buff *skb = arg; |
| 1671 | |
| 1672 | skb_queue_purge(&l2->ui_queue); |
| 1673 | stop_t200(l2, 20); |
| 1674 | l2up(l2, DL_RELEASE_CNF, skb); |
| 1675 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1676 | if (l2->tm) |
| 1677 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1678 | } |
| 1679 | |
| 1680 | static void |
| 1681 | l2_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1682 | { |
| 1683 | struct layer2 *l2 = fi->userdata; |
| 1684 | struct sk_buff *skb = arg; |
| 1685 | |
| 1686 | skb_queue_purge(&l2->i_queue); |
| 1687 | skb_queue_purge(&l2->ui_queue); |
| 1688 | freewin(l2); |
| 1689 | stop_t200(l2, 19); |
| 1690 | mISDN_FsmDelTimer(&l2->t203, 19); |
| 1691 | l2up(l2, DL_RELEASE_IND, skb); |
| 1692 | mISDN_FsmChangeState(fi, ST_L2_4); |
| 1693 | if (l2->tm) |
| 1694 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); |
| 1695 | } |
| 1696 | |
| 1697 | static void |
| 1698 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) |
| 1699 | { |
| 1700 | struct layer2 *l2 = fi->userdata; |
| 1701 | struct sk_buff *skb = arg; |
| 1702 | |
| 1703 | if (!test_and_set_bit(FLG_OWN_BUSY, &l2->flag)) { |
| 1704 | enquiry_cr(l2, RNR, RSP, 0); |
| 1705 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1706 | } |
| 1707 | if (skb) |
| 1708 | dev_kfree_skb(skb); |
| 1709 | } |
| 1710 | |
| 1711 | static void |
| 1712 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) |
| 1713 | { |
| 1714 | struct layer2 *l2 = fi->userdata; |
| 1715 | struct sk_buff *skb = arg; |
| 1716 | |
| 1717 | if (!test_and_clear_bit(FLG_OWN_BUSY, &l2->flag)) { |
| 1718 | enquiry_cr(l2, RR, RSP, 0); |
| 1719 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1720 | } |
| 1721 | if (skb) |
| 1722 | dev_kfree_skb(skb); |
| 1723 | } |
| 1724 | |
| 1725 | static void |
| 1726 | l2_frame_error(struct FsmInst *fi, int event, void *arg) |
| 1727 | { |
| 1728 | struct layer2 *l2 = fi->userdata; |
| 1729 | |
| 1730 | l2mgr(l2, MDL_ERROR_IND, arg); |
| 1731 | } |
| 1732 | |
| 1733 | static void |
| 1734 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) |
| 1735 | { |
| 1736 | struct layer2 *l2 = fi->userdata; |
| 1737 | |
| 1738 | l2mgr(l2, MDL_ERROR_IND, arg); |
| 1739 | establishlink(fi); |
| 1740 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); |
| 1741 | } |
| 1742 | |
| 1743 | static struct FsmNode L2FnList[] = |
| 1744 | { |
| 1745 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, |
| 1746 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, |
| 1747 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, |
| 1748 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, |
| 1749 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, |
| 1750 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, |
| 1751 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, |
| 1752 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, |
| 1753 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, |
| 1754 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, |
| 1755 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, |
| 1756 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, |
| 1757 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, |
| 1758 | {ST_L2_1, EV_L2_DL_UNITDATA, l2_queue_ui_assign}, |
| 1759 | {ST_L2_2, EV_L2_DL_UNITDATA, l2_queue_ui}, |
| 1760 | {ST_L2_3, EV_L2_DL_UNITDATA, l2_queue_ui}, |
| 1761 | {ST_L2_4, EV_L2_DL_UNITDATA, l2_send_ui}, |
| 1762 | {ST_L2_5, EV_L2_DL_UNITDATA, l2_send_ui}, |
| 1763 | {ST_L2_6, EV_L2_DL_UNITDATA, l2_send_ui}, |
| 1764 | {ST_L2_7, EV_L2_DL_UNITDATA, l2_send_ui}, |
| 1765 | {ST_L2_8, EV_L2_DL_UNITDATA, l2_send_ui}, |
| 1766 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, |
| 1767 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, |
| 1768 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, |
| 1769 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, |
| 1770 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, |
| 1771 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, |
| 1772 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, |
| 1773 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, |
| 1774 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, |
| 1775 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, |
| 1776 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, |
| 1777 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, |
| 1778 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, |
| 1779 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, |
| 1780 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, |
| 1781 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, |
| 1782 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, |
| 1783 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, |
| 1784 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, |
| 1785 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, |
| 1786 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, |
| 1787 | {ST_L2_5, EV_L2_UA, l2_connected}, |
| 1788 | {ST_L2_6, EV_L2_UA, l2_released}, |
| 1789 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, |
| 1790 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, |
| 1791 | {ST_L2_4, EV_L2_DM, l2_reestablish}, |
| 1792 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, |
| 1793 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, |
| 1794 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, |
| 1795 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, |
| 1796 | {ST_L2_1, EV_L2_UI, l2_got_ui}, |
| 1797 | {ST_L2_2, EV_L2_UI, l2_got_ui}, |
| 1798 | {ST_L2_3, EV_L2_UI, l2_got_ui}, |
| 1799 | {ST_L2_4, EV_L2_UI, l2_got_ui}, |
| 1800 | {ST_L2_5, EV_L2_UI, l2_got_ui}, |
| 1801 | {ST_L2_6, EV_L2_UI, l2_got_ui}, |
| 1802 | {ST_L2_7, EV_L2_UI, l2_got_ui}, |
| 1803 | {ST_L2_8, EV_L2_UI, l2_got_ui}, |
| 1804 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, |
| 1805 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, |
| 1806 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, |
| 1807 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, |
| 1808 | {ST_L2_7, EV_L2_I, l2_got_iframe}, |
| 1809 | {ST_L2_8, EV_L2_I, l2_got_iframe}, |
| 1810 | {ST_L2_5, EV_L2_T200, l2_st5_tout_200}, |
| 1811 | {ST_L2_6, EV_L2_T200, l2_st6_tout_200}, |
| 1812 | {ST_L2_7, EV_L2_T200, l2_st7_tout_200}, |
| 1813 | {ST_L2_8, EV_L2_T200, l2_st8_tout_200}, |
| 1814 | {ST_L2_7, EV_L2_T203, l2_st7_tout_203}, |
| 1815 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, |
| 1816 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, |
| 1817 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, |
| 1818 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, |
| 1819 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, |
| 1820 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, |
| 1821 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, |
| 1822 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, |
| 1823 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, |
| 1824 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, |
| 1825 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistant_da}, |
| 1826 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, |
| 1827 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, |
| 1828 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistant_da}, |
| 1829 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistant_da}, |
| 1830 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistant_da}, |
| 1831 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistant_da}, |
| 1832 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistant_da}, |
| 1833 | }; |
| 1834 | |
| 1835 | #define L2_FN_COUNT (sizeof(L2FnList)/sizeof(struct FsmNode)) |
| 1836 | |
| 1837 | static int |
| 1838 | ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) |
| 1839 | { |
| 1840 | u_char *datap = skb->data; |
| 1841 | int ret = -EINVAL; |
| 1842 | int psapi, ptei; |
| 1843 | u_int l; |
| 1844 | int c = 0; |
| 1845 | |
| 1846 | l = l2addrsize(l2); |
| 1847 | if (skb->len <= l) { |
| 1848 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *) 'N'); |
| 1849 | return ret; |
| 1850 | } |
| 1851 | if (test_bit(FLG_LAPD, &l2->flag)) { /* Maybe not needed */ |
| 1852 | psapi = *datap++; |
| 1853 | ptei = *datap++; |
| 1854 | if ((psapi & 1) || !(ptei & 1)) { |
| 1855 | printk(KERN_WARNING |
| 1856 | "l2 D-channel frame wrong EA0/EA1\n"); |
| 1857 | return ret; |
| 1858 | } |
| 1859 | psapi >>= 2; |
| 1860 | ptei >>= 1; |
| 1861 | if (psapi != l2->sapi) { |
| 1862 | /* not our bussiness |
| 1863 | * printk(KERN_DEBUG "%s: sapi %d/%d sapi mismatch\n", |
| 1864 | * __func__, |
| 1865 | * psapi, l2->sapi); |
| 1866 | */ |
| 1867 | dev_kfree_skb(skb); |
| 1868 | return 0; |
| 1869 | } |
| 1870 | if ((ptei != l2->tei) && (ptei != GROUP_TEI)) { |
| 1871 | /* not our bussiness |
| 1872 | * printk(KERN_DEBUG "%s: tei %d/%d sapi %d mismatch\n", |
| 1873 | * __func__, |
| 1874 | * ptei, l2->tei, psapi); |
| 1875 | */ |
| 1876 | dev_kfree_skb(skb); |
| 1877 | return 0; |
| 1878 | } |
| 1879 | } else |
| 1880 | datap += l; |
| 1881 | if (!(*datap & 1)) { /* I-Frame */ |
| 1882 | c = iframe_error(l2, skb); |
| 1883 | if (!c) |
| 1884 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_I, skb); |
| 1885 | } else if (IsSFrame(datap, l2)) { /* S-Frame */ |
| 1886 | c = super_error(l2, skb); |
| 1887 | if (!c) |
| 1888 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SUPER, skb); |
| 1889 | } else if (IsUI(datap)) { |
| 1890 | c = UI_error(l2, skb); |
| 1891 | if (!c) |
| 1892 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UI, skb); |
| 1893 | } else if (IsSABME(datap, l2)) { |
| 1894 | c = unnum_error(l2, skb, CMD); |
| 1895 | if (!c) |
| 1896 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SABME, skb); |
| 1897 | } else if (IsUA(datap)) { |
| 1898 | c = unnum_error(l2, skb, RSP); |
| 1899 | if (!c) |
| 1900 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UA, skb); |
| 1901 | } else if (IsDISC(datap)) { |
| 1902 | c = unnum_error(l2, skb, CMD); |
| 1903 | if (!c) |
| 1904 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DISC, skb); |
| 1905 | } else if (IsDM(datap)) { |
| 1906 | c = unnum_error(l2, skb, RSP); |
| 1907 | if (!c) |
| 1908 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DM, skb); |
| 1909 | } else if (IsFRMR(datap)) { |
| 1910 | c = FRMR_error(l2, skb); |
| 1911 | if (!c) |
| 1912 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_FRMR, skb); |
| 1913 | } else |
| 1914 | c = 'L'; |
| 1915 | if (c) { |
| 1916 | printk(KERN_WARNING "l2 D-channel frame error %c\n", c); |
| 1917 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c); |
| 1918 | } |
| 1919 | return ret; |
| 1920 | } |
| 1921 | |
| 1922 | static int |
| 1923 | l2_send(struct mISDNchannel *ch, struct sk_buff *skb) |
| 1924 | { |
| 1925 | struct layer2 *l2 = container_of(ch, struct layer2, ch); |
| 1926 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
| 1927 | int ret = -EINVAL; |
| 1928 | |
| 1929 | if (*debug & DEBUG_L2_RECV) |
| 1930 | printk(KERN_DEBUG "%s: prim(%x) id(%x) tei(%d)\n", |
| 1931 | __func__, hh->prim, hh->id, l2->tei); |
| 1932 | switch (hh->prim) { |
| 1933 | case PH_DATA_IND: |
| 1934 | ret = ph_data_indication(l2, hh, skb); |
| 1935 | break; |
| 1936 | case PH_DATA_CNF: |
| 1937 | ret = ph_data_confirm(l2, hh, skb); |
| 1938 | break; |
| 1939 | case PH_ACTIVATE_IND: |
| 1940 | test_and_set_bit(FLG_L1_ACTIV, &l2->flag); |
| 1941 | l2up_create(l2, MPH_ACTIVATE_IND, 0, NULL); |
| 1942 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) |
| 1943 | ret = mISDN_FsmEvent(&l2->l2m, |
| 1944 | EV_L2_DL_ESTABLISH_REQ, skb); |
| 1945 | break; |
| 1946 | case PH_DEACTIVATE_IND: |
| 1947 | test_and_clear_bit(FLG_L1_ACTIV, &l2->flag); |
| 1948 | l2up_create(l2, MPH_DEACTIVATE_IND, 0, NULL); |
| 1949 | ret = mISDN_FsmEvent(&l2->l2m, EV_L1_DEACTIVATE, skb); |
| 1950 | break; |
| 1951 | case MPH_INFORMATION_IND: |
| 1952 | if (!l2->up) |
| 1953 | break; |
| 1954 | ret = l2->up->send(l2->up, skb); |
| 1955 | break; |
| 1956 | case DL_DATA_REQ: |
| 1957 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_DATA, skb); |
| 1958 | break; |
| 1959 | case DL_UNITDATA_REQ: |
| 1960 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_UNITDATA, skb); |
| 1961 | break; |
| 1962 | case DL_ESTABLISH_REQ: |
| 1963 | if (test_bit(FLG_LAPB, &l2->flag)) |
| 1964 | test_and_set_bit(FLG_ORIG, &l2->flag); |
| 1965 | if (test_bit(FLG_L1_ACTIV, &l2->flag)) { |
| 1966 | if (test_bit(FLG_LAPD, &l2->flag) || |
| 1967 | test_bit(FLG_ORIG, &l2->flag)) |
| 1968 | ret = mISDN_FsmEvent(&l2->l2m, |
| 1969 | EV_L2_DL_ESTABLISH_REQ, skb); |
| 1970 | } else { |
| 1971 | if (test_bit(FLG_LAPD, &l2->flag) || |
| 1972 | test_bit(FLG_ORIG, &l2->flag)) { |
| 1973 | test_and_set_bit(FLG_ESTAB_PEND, |
| 1974 | &l2->flag); |
| 1975 | } |
| 1976 | ret = l2down(l2, PH_ACTIVATE_REQ, l2_newid(l2), |
| 1977 | skb); |
| 1978 | } |
| 1979 | break; |
| 1980 | case DL_RELEASE_REQ: |
| 1981 | if (test_bit(FLG_LAPB, &l2->flag)) |
| 1982 | l2down_create(l2, PH_DEACTIVATE_REQ, |
| 1983 | l2_newid(l2), 0, NULL); |
| 1984 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_RELEASE_REQ, |
| 1985 | skb); |
| 1986 | break; |
| 1987 | default: |
| 1988 | if (*debug & DEBUG_L2) |
| 1989 | l2m_debug(&l2->l2m, "l2 unknown pr %04x", |
| 1990 | hh->prim); |
| 1991 | } |
| 1992 | if (ret) { |
| 1993 | dev_kfree_skb(skb); |
| 1994 | ret = 0; |
| 1995 | } |
| 1996 | return ret; |
| 1997 | } |
| 1998 | |
| 1999 | int |
| 2000 | tei_l2(struct layer2 *l2, u_int cmd, u_long arg) |
| 2001 | { |
| 2002 | int ret = -EINVAL; |
| 2003 | |
| 2004 | if (*debug & DEBUG_L2_TEI) |
| 2005 | printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd); |
| 2006 | switch (cmd) { |
| 2007 | case (MDL_ASSIGN_REQ): |
| 2008 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg); |
| 2009 | break; |
| 2010 | case (MDL_REMOVE_REQ): |
| 2011 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_REMOVE, NULL); |
| 2012 | break; |
| 2013 | case (MDL_ERROR_IND): |
| 2014 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); |
| 2015 | break; |
| 2016 | case (MDL_ERROR_RSP): |
| 2017 | /* ETS 300-125 5.3.2.1 Test: TC13010 */ |
| 2018 | printk(KERN_NOTICE "MDL_ERROR|REQ (tei_l2)\n"); |
| 2019 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); |
| 2020 | break; |
| 2021 | } |
| 2022 | return ret; |
| 2023 | } |
| 2024 | |
| 2025 | static void |
| 2026 | release_l2(struct layer2 *l2) |
| 2027 | { |
| 2028 | mISDN_FsmDelTimer(&l2->t200, 21); |
| 2029 | mISDN_FsmDelTimer(&l2->t203, 16); |
| 2030 | skb_queue_purge(&l2->i_queue); |
| 2031 | skb_queue_purge(&l2->ui_queue); |
| 2032 | skb_queue_purge(&l2->down_queue); |
| 2033 | ReleaseWin(l2); |
| 2034 | if (test_bit(FLG_LAPD, &l2->flag)) { |
Karsten Keil | c5b61d5 | 2008-07-27 18:32:50 +0200 | [diff] [blame] | 2035 | TEIrelease(l2); |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2036 | if (l2->ch.st) |
| 2037 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, |
| 2038 | CLOSE_CHANNEL, NULL); |
| 2039 | } |
| 2040 | kfree(l2); |
| 2041 | } |
| 2042 | |
| 2043 | static int |
| 2044 | l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) |
| 2045 | { |
| 2046 | struct layer2 *l2 = container_of(ch, struct layer2, ch); |
| 2047 | u_int info; |
| 2048 | |
| 2049 | if (*debug & DEBUG_L2_CTRL) |
| 2050 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); |
| 2051 | |
| 2052 | switch (cmd) { |
| 2053 | case OPEN_CHANNEL: |
| 2054 | if (test_bit(FLG_LAPD, &l2->flag)) { |
| 2055 | set_channel_address(&l2->ch, l2->sapi, l2->tei); |
| 2056 | info = DL_INFO_L2_CONNECT; |
| 2057 | l2up_create(l2, DL_INFORMATION_IND, |
| 2058 | sizeof(info), &info); |
| 2059 | } |
| 2060 | break; |
| 2061 | case CLOSE_CHANNEL: |
| 2062 | if (l2->ch.peer) |
| 2063 | l2->ch.peer->ctrl(l2->ch.peer, CLOSE_CHANNEL, NULL); |
| 2064 | release_l2(l2); |
| 2065 | break; |
| 2066 | } |
| 2067 | return 0; |
| 2068 | } |
| 2069 | |
| 2070 | struct layer2 * |
Andreas Eversberg | 5b277b8 | 2009-05-25 00:50:02 -0700 | [diff] [blame^] | 2071 | create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei, |
| 2072 | int sapi) |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2073 | { |
| 2074 | struct layer2 *l2; |
| 2075 | struct channel_req rq; |
| 2076 | |
| 2077 | l2 = kzalloc(sizeof(struct layer2), GFP_KERNEL); |
| 2078 | if (!l2) { |
| 2079 | printk(KERN_ERR "kzalloc layer2 failed\n"); |
| 2080 | return NULL; |
| 2081 | } |
| 2082 | l2->next_id = 1; |
| 2083 | l2->down_id = MISDN_ID_NONE; |
| 2084 | l2->up = ch; |
| 2085 | l2->ch.st = ch->st; |
| 2086 | l2->ch.send = l2_send; |
| 2087 | l2->ch.ctrl = l2_ctrl; |
| 2088 | switch (protocol) { |
| 2089 | case ISDN_P_LAPD_NT: |
| 2090 | test_and_set_bit(FLG_LAPD, &l2->flag); |
| 2091 | test_and_set_bit(FLG_LAPD_NET, &l2->flag); |
| 2092 | test_and_set_bit(FLG_MOD128, &l2->flag); |
Andreas Eversberg | 5b277b8 | 2009-05-25 00:50:02 -0700 | [diff] [blame^] | 2093 | l2->sapi = sapi; |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2094 | l2->maxlen = MAX_DFRAME_LEN; |
| 2095 | if (test_bit(OPTION_L2_PMX, &options)) |
| 2096 | l2->window = 7; |
| 2097 | else |
| 2098 | l2->window = 1; |
| 2099 | if (test_bit(OPTION_L2_PTP, &options)) |
| 2100 | test_and_set_bit(FLG_PTP, &l2->flag); |
| 2101 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) |
| 2102 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); |
Andreas Eversberg | 5b277b8 | 2009-05-25 00:50:02 -0700 | [diff] [blame^] | 2103 | l2->tei = tei; |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2104 | l2->T200 = 1000; |
| 2105 | l2->N200 = 3; |
| 2106 | l2->T203 = 10000; |
| 2107 | if (test_bit(OPTION_L2_PMX, &options)) |
| 2108 | rq.protocol = ISDN_P_NT_E1; |
| 2109 | else |
| 2110 | rq.protocol = ISDN_P_NT_S0; |
| 2111 | rq.adr.channel = 0; |
| 2112 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); |
| 2113 | break; |
| 2114 | case ISDN_P_LAPD_TE: |
| 2115 | test_and_set_bit(FLG_LAPD, &l2->flag); |
| 2116 | test_and_set_bit(FLG_MOD128, &l2->flag); |
| 2117 | test_and_set_bit(FLG_ORIG, &l2->flag); |
Andreas Eversberg | 5b277b8 | 2009-05-25 00:50:02 -0700 | [diff] [blame^] | 2118 | l2->sapi = sapi; |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2119 | l2->maxlen = MAX_DFRAME_LEN; |
| 2120 | if (test_bit(OPTION_L2_PMX, &options)) |
| 2121 | l2->window = 7; |
| 2122 | else |
| 2123 | l2->window = 1; |
| 2124 | if (test_bit(OPTION_L2_PTP, &options)) |
| 2125 | test_and_set_bit(FLG_PTP, &l2->flag); |
| 2126 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) |
| 2127 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); |
Andreas Eversberg | 5b277b8 | 2009-05-25 00:50:02 -0700 | [diff] [blame^] | 2128 | l2->tei = tei; |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2129 | l2->T200 = 1000; |
| 2130 | l2->N200 = 3; |
| 2131 | l2->T203 = 10000; |
| 2132 | if (test_bit(OPTION_L2_PMX, &options)) |
| 2133 | rq.protocol = ISDN_P_TE_E1; |
| 2134 | else |
| 2135 | rq.protocol = ISDN_P_TE_S0; |
| 2136 | rq.adr.channel = 0; |
| 2137 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); |
| 2138 | break; |
| 2139 | case ISDN_P_B_X75SLP: |
| 2140 | test_and_set_bit(FLG_LAPB, &l2->flag); |
| 2141 | l2->window = 7; |
| 2142 | l2->maxlen = MAX_DATA_SIZE; |
| 2143 | l2->T200 = 1000; |
| 2144 | l2->N200 = 4; |
| 2145 | l2->T203 = 5000; |
| 2146 | l2->addr.A = 3; |
| 2147 | l2->addr.B = 1; |
| 2148 | break; |
| 2149 | default: |
| 2150 | printk(KERN_ERR "layer2 create failed prt %x\n", |
| 2151 | protocol); |
| 2152 | kfree(l2); |
| 2153 | return NULL; |
| 2154 | } |
| 2155 | skb_queue_head_init(&l2->i_queue); |
| 2156 | skb_queue_head_init(&l2->ui_queue); |
| 2157 | skb_queue_head_init(&l2->down_queue); |
| 2158 | skb_queue_head_init(&l2->tmp_queue); |
| 2159 | InitWin(l2); |
| 2160 | l2->l2m.fsm = &l2fsm; |
| 2161 | if (test_bit(FLG_LAPB, &l2->flag) || |
| 2162 | test_bit(FLG_PTP, &l2->flag) || |
| 2163 | test_bit(FLG_LAPD_NET, &l2->flag)) |
| 2164 | l2->l2m.state = ST_L2_4; |
| 2165 | else |
| 2166 | l2->l2m.state = ST_L2_1; |
| 2167 | l2->l2m.debug = *debug; |
| 2168 | l2->l2m.userdata = l2; |
| 2169 | l2->l2m.userint = 0; |
| 2170 | l2->l2m.printdebug = l2m_debug; |
| 2171 | |
| 2172 | mISDN_FsmInitTimer(&l2->l2m, &l2->t200); |
| 2173 | mISDN_FsmInitTimer(&l2->l2m, &l2->t203); |
| 2174 | return l2; |
| 2175 | } |
| 2176 | |
| 2177 | static int |
| 2178 | x75create(struct channel_req *crq) |
| 2179 | { |
| 2180 | struct layer2 *l2; |
| 2181 | |
| 2182 | if (crq->protocol != ISDN_P_B_X75SLP) |
| 2183 | return -EPROTONOSUPPORT; |
Andreas Eversberg | 5b277b8 | 2009-05-25 00:50:02 -0700 | [diff] [blame^] | 2184 | l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0); |
Karsten Keil | 1b2b03f | 2008-07-27 01:54:58 +0200 | [diff] [blame] | 2185 | if (!l2) |
| 2186 | return -ENOMEM; |
| 2187 | crq->ch = &l2->ch; |
| 2188 | crq->protocol = ISDN_P_B_HDLC; |
| 2189 | return 0; |
| 2190 | } |
| 2191 | |
| 2192 | static struct Bprotocol X75SLP = { |
| 2193 | .Bprotocols = (1 << (ISDN_P_B_X75SLP & ISDN_P_B_MASK)), |
| 2194 | .name = "X75SLP", |
| 2195 | .create = x75create |
| 2196 | }; |
| 2197 | |
| 2198 | int |
| 2199 | Isdnl2_Init(u_int *deb) |
| 2200 | { |
| 2201 | debug = deb; |
| 2202 | mISDN_register_Bprotocol(&X75SLP); |
| 2203 | l2fsm.state_count = L2_STATE_COUNT; |
| 2204 | l2fsm.event_count = L2_EVENT_COUNT; |
| 2205 | l2fsm.strEvent = strL2Event; |
| 2206 | l2fsm.strState = strL2State; |
| 2207 | mISDN_FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList)); |
| 2208 | TEIInit(deb); |
| 2209 | return 0; |
| 2210 | } |
| 2211 | |
| 2212 | void |
| 2213 | Isdnl2_cleanup(void) |
| 2214 | { |
| 2215 | mISDN_unregister_Bprotocol(&X75SLP); |
| 2216 | TEIFree(); |
| 2217 | mISDN_FsmFree(&l2fsm); |
| 2218 | } |
| 2219 | |