Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: isdnl2.c,v 2.30.2.4 2004/02/11 13:21:34 keil Exp $ |
| 2 | * |
| 3 | * Author Karsten Keil |
| 4 | * based on the teles driver from Jan den Ouden |
| 5 | * Copyright by Karsten Keil <keil@isdn4linux.de> |
| 6 | * |
| 7 | * This software may be used and distributed according to the terms |
| 8 | * of the GNU General Public License, incorporated herein by reference. |
| 9 | * |
| 10 | * For changes and modifications please read |
| 11 | * Documentation/isdn/HiSax.cert |
| 12 | * |
| 13 | * Thanks to Jan den Ouden |
| 14 | * Fritz Elfert |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include "hisax.h" |
| 20 | #include "isdnl2.h" |
| 21 | |
| 22 | const char *l2_revision = "$Revision: 2.30.2.4 $"; |
| 23 | |
| 24 | static void l2m_debug(struct FsmInst *fi, char *fmt, ...); |
| 25 | |
| 26 | static struct Fsm l2fsm; |
| 27 | |
| 28 | enum { |
| 29 | ST_L2_1, |
| 30 | ST_L2_2, |
| 31 | ST_L2_3, |
| 32 | ST_L2_4, |
| 33 | ST_L2_5, |
| 34 | ST_L2_6, |
| 35 | ST_L2_7, |
| 36 | ST_L2_8, |
| 37 | }; |
| 38 | |
| 39 | #define L2_STATE_COUNT (ST_L2_8+1) |
| 40 | |
| 41 | static char *strL2State[] = |
| 42 | { |
| 43 | "ST_L2_1", |
| 44 | "ST_L2_2", |
| 45 | "ST_L2_3", |
| 46 | "ST_L2_4", |
| 47 | "ST_L2_5", |
| 48 | "ST_L2_6", |
| 49 | "ST_L2_7", |
| 50 | "ST_L2_8", |
| 51 | }; |
| 52 | |
| 53 | enum { |
| 54 | EV_L2_UI, |
| 55 | EV_L2_SABME, |
| 56 | EV_L2_DISC, |
| 57 | EV_L2_DM, |
| 58 | EV_L2_UA, |
| 59 | EV_L2_FRMR, |
| 60 | EV_L2_SUPER, |
| 61 | EV_L2_I, |
| 62 | EV_L2_DL_DATA, |
| 63 | EV_L2_ACK_PULL, |
| 64 | EV_L2_DL_UNIT_DATA, |
| 65 | EV_L2_DL_ESTABLISH_REQ, |
| 66 | EV_L2_DL_RELEASE_REQ, |
| 67 | EV_L2_MDL_ASSIGN, |
| 68 | EV_L2_MDL_REMOVE, |
| 69 | EV_L2_MDL_ERROR, |
| 70 | EV_L1_DEACTIVATE, |
| 71 | EV_L2_T200, |
| 72 | EV_L2_T203, |
| 73 | EV_L2_SET_OWN_BUSY, |
| 74 | EV_L2_CLEAR_OWN_BUSY, |
| 75 | EV_L2_FRAME_ERROR, |
| 76 | }; |
| 77 | |
| 78 | #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1) |
| 79 | |
| 80 | static char *strL2Event[] = |
| 81 | { |
| 82 | "EV_L2_UI", |
| 83 | "EV_L2_SABME", |
| 84 | "EV_L2_DISC", |
| 85 | "EV_L2_DM", |
| 86 | "EV_L2_UA", |
| 87 | "EV_L2_FRMR", |
| 88 | "EV_L2_SUPER", |
| 89 | "EV_L2_I", |
| 90 | "EV_L2_DL_DATA", |
| 91 | "EV_L2_ACK_PULL", |
| 92 | "EV_L2_DL_UNIT_DATA", |
| 93 | "EV_L2_DL_ESTABLISH_REQ", |
| 94 | "EV_L2_DL_RELEASE_REQ", |
| 95 | "EV_L2_MDL_ASSIGN", |
| 96 | "EV_L2_MDL_REMOVE", |
| 97 | "EV_L2_MDL_ERROR", |
| 98 | "EV_L1_DEACTIVATE", |
| 99 | "EV_L2_T200", |
| 100 | "EV_L2_T203", |
| 101 | "EV_L2_SET_OWN_BUSY", |
| 102 | "EV_L2_CLEAR_OWN_BUSY", |
| 103 | "EV_L2_FRAME_ERROR", |
| 104 | }; |
| 105 | |
| 106 | static int l2addrsize(struct Layer2 *l2); |
| 107 | |
| 108 | static void |
| 109 | set_peer_busy(struct Layer2 *l2) { |
| 110 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); |
| 111 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) |
| 112 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); |
| 113 | } |
| 114 | |
| 115 | static void |
| 116 | clear_peer_busy(struct Layer2 *l2) { |
| 117 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) |
| 118 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); |
| 119 | } |
| 120 | |
| 121 | static void |
| 122 | InitWin(struct Layer2 *l2) |
| 123 | { |
| 124 | int i; |
| 125 | |
| 126 | for (i = 0; i < MAX_WINDOW; i++) |
| 127 | l2->windowar[i] = NULL; |
| 128 | } |
| 129 | |
| 130 | static int |
| 131 | freewin1(struct Layer2 *l2) |
| 132 | { |
| 133 | int i, cnt = 0; |
| 134 | |
| 135 | for (i = 0; i < MAX_WINDOW; i++) { |
| 136 | if (l2->windowar[i]) { |
| 137 | cnt++; |
| 138 | dev_kfree_skb(l2->windowar[i]); |
| 139 | l2->windowar[i] = NULL; |
| 140 | } |
| 141 | } |
| 142 | return cnt; |
| 143 | } |
| 144 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 145 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | freewin(struct PStack *st) |
| 147 | { |
| 148 | freewin1(&st->l2); |
| 149 | } |
| 150 | |
| 151 | static void |
| 152 | ReleaseWin(struct Layer2 *l2) |
| 153 | { |
| 154 | int cnt; |
| 155 | |
| 156 | if((cnt = freewin1(l2))) |
| 157 | printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt); |
| 158 | } |
| 159 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 160 | static inline unsigned int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | cansend(struct PStack *st) |
| 162 | { |
| 163 | unsigned int p1; |
| 164 | |
| 165 | if(test_bit(FLG_MOD128, &st->l2.flag)) |
| 166 | p1 = (st->l2.vs - st->l2.va) % 128; |
| 167 | else |
| 168 | p1 = (st->l2.vs - st->l2.va) % 8; |
| 169 | return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag)); |
| 170 | } |
| 171 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 172 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | clear_exception(struct Layer2 *l2) |
| 174 | { |
| 175 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 176 | test_and_clear_bit(FLG_REJEXC, &l2->flag); |
| 177 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); |
| 178 | clear_peer_busy(l2); |
| 179 | } |
| 180 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 181 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | l2headersize(struct Layer2 *l2, int ui) |
| 183 | { |
| 184 | return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + |
| 185 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1)); |
| 186 | } |
| 187 | |
| 188 | inline int |
| 189 | l2addrsize(struct Layer2 *l2) |
| 190 | { |
| 191 | return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); |
| 192 | } |
| 193 | |
| 194 | static int |
| 195 | sethdraddr(struct Layer2 *l2, u_char * header, int rsp) |
| 196 | { |
| 197 | u_char *ptr = header; |
| 198 | int crbit = rsp; |
| 199 | |
| 200 | if (test_bit(FLG_LAPD, &l2->flag)) { |
| 201 | *ptr++ = (l2->sap << 2) | (rsp ? 2 : 0); |
| 202 | *ptr++ = (l2->tei << 1) | 1; |
| 203 | return (2); |
| 204 | } else { |
| 205 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 206 | crbit = !crbit; |
| 207 | if (crbit) |
| 208 | *ptr++ = 1; |
| 209 | else |
| 210 | *ptr++ = 3; |
| 211 | return (1); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | inline static void |
| 216 | enqueue_super(struct PStack *st, |
| 217 | struct sk_buff *skb) |
| 218 | { |
| 219 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 220 | st->l1.bcs->tx_cnt += skb->len; |
| 221 | st->l2.l2l1(st, PH_DATA | REQUEST, skb); |
| 222 | } |
| 223 | |
| 224 | #define enqueue_ui(a, b) enqueue_super(a, b) |
| 225 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 226 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | IsUI(u_char * data) |
| 228 | { |
| 229 | return ((data[0] & 0xef) == UI); |
| 230 | } |
| 231 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 232 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | IsUA(u_char * data) |
| 234 | { |
| 235 | return ((data[0] & 0xef) == UA); |
| 236 | } |
| 237 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 238 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | IsDM(u_char * data) |
| 240 | { |
| 241 | return ((data[0] & 0xef) == DM); |
| 242 | } |
| 243 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 244 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | IsDISC(u_char * data) |
| 246 | { |
| 247 | return ((data[0] & 0xef) == DISC); |
| 248 | } |
| 249 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 250 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | IsSFrame(u_char * data, struct PStack *st) |
| 252 | { |
| 253 | register u_char d = *data; |
| 254 | |
| 255 | if (!test_bit(FLG_MOD128, &st->l2.flag)) |
| 256 | d &= 0xf; |
| 257 | return(((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c)); |
| 258 | } |
| 259 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 260 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | IsSABME(u_char * data, struct PStack *st) |
| 262 | { |
| 263 | u_char d = data[0] & ~0x10; |
| 264 | |
| 265 | return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM); |
| 266 | } |
| 267 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 268 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | IsREJ(u_char * data, struct PStack *st) |
| 270 | { |
| 271 | return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ); |
| 272 | } |
| 273 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 274 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | IsFRMR(u_char * data) |
| 276 | { |
| 277 | return ((data[0] & 0xef) == FRMR); |
| 278 | } |
| 279 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 280 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | IsRNR(u_char * data, struct PStack *st) |
| 282 | { |
| 283 | return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR); |
| 284 | } |
| 285 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 286 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | iframe_error(struct PStack *st, struct sk_buff *skb) |
| 288 | { |
| 289 | int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1); |
| 290 | int rsp = *skb->data & 0x2; |
| 291 | |
| 292 | if (test_bit(FLG_ORIG, &st->l2.flag)) |
| 293 | rsp = !rsp; |
| 294 | |
| 295 | if (rsp) |
| 296 | return 'L'; |
| 297 | |
| 298 | |
| 299 | if (skb->len < i) |
| 300 | return 'N'; |
| 301 | |
| 302 | if ((skb->len - i) > st->l2.maxlen) |
| 303 | return 'O'; |
| 304 | |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 309 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | super_error(struct PStack *st, struct sk_buff *skb) |
| 311 | { |
| 312 | if (skb->len != l2addrsize(&st->l2) + |
| 313 | (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1)) |
| 314 | return 'N'; |
| 315 | |
| 316 | return 0; |
| 317 | } |
| 318 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 319 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp) |
| 321 | { |
| 322 | int rsp = (*skb->data & 0x2) >> 1; |
| 323 | if (test_bit(FLG_ORIG, &st->l2.flag)) |
| 324 | rsp = !rsp; |
| 325 | |
| 326 | if (rsp != wantrsp) |
| 327 | return 'L'; |
| 328 | |
| 329 | if (skb->len != l2addrsize(&st->l2) + 1) |
| 330 | return 'N'; |
| 331 | |
| 332 | return 0; |
| 333 | } |
| 334 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 335 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | UI_error(struct PStack *st, struct sk_buff *skb) |
| 337 | { |
| 338 | int rsp = *skb->data & 0x2; |
| 339 | if (test_bit(FLG_ORIG, &st->l2.flag)) |
| 340 | rsp = !rsp; |
| 341 | |
| 342 | if (rsp) |
| 343 | return 'L'; |
| 344 | |
| 345 | if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1) |
| 346 | return 'O'; |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 351 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | FRMR_error(struct PStack *st, struct sk_buff *skb) |
| 353 | { |
| 354 | int headers = l2addrsize(&st->l2) + 1; |
| 355 | u_char *datap = skb->data + headers; |
| 356 | int rsp = *skb->data & 0x2; |
| 357 | |
| 358 | if (test_bit(FLG_ORIG, &st->l2.flag)) |
| 359 | rsp = !rsp; |
| 360 | |
| 361 | if (!rsp) |
| 362 | return 'L'; |
| 363 | |
| 364 | if (test_bit(FLG_MOD128, &st->l2.flag)) { |
| 365 | if (skb->len < headers + 5) |
| 366 | return 'N'; |
| 367 | else |
| 368 | l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x", |
| 369 | datap[0], datap[1], datap[2], |
| 370 | datap[3], datap[4]); |
| 371 | } else { |
| 372 | if (skb->len < headers + 3) |
| 373 | return 'N'; |
| 374 | else |
| 375 | l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x", |
| 376 | datap[0], datap[1], datap[2]); |
| 377 | } |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | static unsigned int |
| 383 | legalnr(struct PStack *st, unsigned int nr) |
| 384 | { |
| 385 | struct Layer2 *l2 = &st->l2; |
| 386 | |
| 387 | if(test_bit(FLG_MOD128, &l2->flag)) |
| 388 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); |
| 389 | else |
| 390 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); |
| 391 | } |
| 392 | |
| 393 | static void |
| 394 | setva(struct PStack *st, unsigned int nr) |
| 395 | { |
| 396 | struct Layer2 *l2 = &st->l2; |
| 397 | int len; |
| 398 | u_long flags; |
| 399 | |
| 400 | spin_lock_irqsave(&l2->lock, flags); |
| 401 | while (l2->va != nr) { |
| 402 | (l2->va)++; |
| 403 | if(test_bit(FLG_MOD128, &l2->flag)) |
| 404 | l2->va %= 128; |
| 405 | else |
| 406 | l2->va %= 8; |
| 407 | len = l2->windowar[l2->sow]->len; |
| 408 | if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type) |
| 409 | len = -1; |
| 410 | dev_kfree_skb(l2->windowar[l2->sow]); |
| 411 | l2->windowar[l2->sow] = NULL; |
| 412 | l2->sow = (l2->sow + 1) % l2->window; |
| 413 | spin_unlock_irqrestore(&l2->lock, flags); |
| 414 | if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >=0)) |
| 415 | lli_writewakeup(st, len); |
| 416 | spin_lock_irqsave(&l2->lock, flags); |
| 417 | } |
| 418 | spin_unlock_irqrestore(&l2->lock, flags); |
| 419 | } |
| 420 | |
| 421 | static void |
| 422 | send_uframe(struct PStack *st, u_char cmd, u_char cr) |
| 423 | { |
| 424 | struct sk_buff *skb; |
| 425 | u_char tmp[MAX_HEADER_LEN]; |
| 426 | int i; |
| 427 | |
| 428 | i = sethdraddr(&st->l2, tmp, cr); |
| 429 | tmp[i++] = cmd; |
| 430 | if (!(skb = alloc_skb(i, GFP_ATOMIC))) { |
| 431 | printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n"); |
| 432 | return; |
| 433 | } |
| 434 | memcpy(skb_put(skb, i), tmp, i); |
| 435 | enqueue_super(st, skb); |
| 436 | } |
| 437 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 438 | static inline u_char |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | get_PollFlag(struct PStack * st, struct sk_buff * skb) |
| 440 | { |
| 441 | return (skb->data[l2addrsize(&(st->l2))] & 0x10); |
| 442 | } |
| 443 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 444 | static inline u_char |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | get_PollFlagFree(struct PStack *st, struct sk_buff *skb) |
| 446 | { |
| 447 | u_char PF; |
| 448 | |
| 449 | PF = get_PollFlag(st, skb); |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 450 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | return (PF); |
| 452 | } |
| 453 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 454 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | start_t200(struct PStack *st, int i) |
| 456 | { |
| 457 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i); |
| 458 | test_and_set_bit(FLG_T200_RUN, &st->l2.flag); |
| 459 | } |
| 460 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 461 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | restart_t200(struct PStack *st, int i) |
| 463 | { |
| 464 | FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i); |
| 465 | test_and_set_bit(FLG_T200_RUN, &st->l2.flag); |
| 466 | } |
| 467 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 468 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | stop_t200(struct PStack *st, int i) |
| 470 | { |
| 471 | if(test_and_clear_bit(FLG_T200_RUN, &st->l2.flag)) |
| 472 | FsmDelTimer(&st->l2.t200, i); |
| 473 | } |
| 474 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 475 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | st5_dl_release_l2l3(struct PStack *st) |
| 477 | { |
| 478 | int pr; |
| 479 | |
| 480 | if(test_and_clear_bit(FLG_PEND_REL, &st->l2.flag)) |
| 481 | pr = DL_RELEASE | CONFIRM; |
| 482 | else |
| 483 | pr = DL_RELEASE | INDICATION; |
| 484 | |
| 485 | st->l2.l2l3(st, pr, NULL); |
| 486 | } |
| 487 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 488 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | lapb_dl_release_l2l3(struct PStack *st, int f) |
| 490 | { |
| 491 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 492 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); |
| 493 | st->l2.l2l3(st, DL_RELEASE | f, NULL); |
| 494 | } |
| 495 | |
| 496 | static void |
| 497 | establishlink(struct FsmInst *fi) |
| 498 | { |
| 499 | struct PStack *st = fi->userdata; |
| 500 | u_char cmd; |
| 501 | |
| 502 | clear_exception(&st->l2); |
| 503 | st->l2.rc = 0; |
| 504 | cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10; |
| 505 | send_uframe(st, cmd, CMD); |
| 506 | FsmDelTimer(&st->l2.t203, 1); |
| 507 | restart_t200(st, 1); |
| 508 | test_and_clear_bit(FLG_PEND_REL, &st->l2.flag); |
| 509 | freewin(st); |
| 510 | FsmChangeState(fi, ST_L2_5); |
| 511 | } |
| 512 | |
| 513 | static void |
| 514 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) |
| 515 | { |
| 516 | struct sk_buff *skb = arg; |
| 517 | struct PStack *st = fi->userdata; |
| 518 | |
| 519 | if (get_PollFlagFree(st, skb)) |
| 520 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C'); |
| 521 | else |
| 522 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D'); |
| 523 | } |
| 524 | |
| 525 | static void |
| 526 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) |
| 527 | { |
| 528 | struct sk_buff *skb = arg; |
| 529 | struct PStack *st = fi->userdata; |
| 530 | |
| 531 | if (get_PollFlagFree(st, skb)) |
| 532 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B'); |
| 533 | else { |
| 534 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E'); |
| 535 | establishlink(fi); |
| 536 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | static void |
| 541 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) |
| 542 | { |
| 543 | struct sk_buff *skb = arg; |
| 544 | struct PStack *st = fi->userdata; |
| 545 | |
| 546 | if (get_PollFlagFree(st, skb)) |
| 547 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B'); |
| 548 | else { |
| 549 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E'); |
| 550 | } |
| 551 | establishlink(fi); |
| 552 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); |
| 553 | } |
| 554 | |
| 555 | static void |
| 556 | l2_go_st3(struct FsmInst *fi, int event, void *arg) |
| 557 | { |
| 558 | FsmChangeState(fi, ST_L2_3); |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) |
| 563 | { |
| 564 | struct PStack *st = fi->userdata; |
| 565 | |
| 566 | FsmChangeState(fi, ST_L2_3); |
| 567 | st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL); |
| 568 | } |
| 569 | |
| 570 | static void |
| 571 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) |
| 572 | { |
| 573 | struct PStack *st = fi->userdata; |
| 574 | struct sk_buff *skb = arg; |
| 575 | |
| 576 | skb_queue_tail(&st->l2.ui_queue, skb); |
| 577 | FsmChangeState(fi, ST_L2_2); |
| 578 | st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL); |
| 579 | } |
| 580 | |
| 581 | static void |
| 582 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) |
| 583 | { |
| 584 | struct PStack *st = fi->userdata; |
| 585 | struct sk_buff *skb = arg; |
| 586 | |
| 587 | skb_queue_tail(&st->l2.ui_queue, skb); |
| 588 | } |
| 589 | |
| 590 | static void |
| 591 | tx_ui(struct PStack *st) |
| 592 | { |
| 593 | struct sk_buff *skb; |
| 594 | u_char header[MAX_HEADER_LEN]; |
| 595 | int i; |
| 596 | |
| 597 | i = sethdraddr(&(st->l2), header, CMD); |
| 598 | header[i++] = UI; |
| 599 | while ((skb = skb_dequeue(&st->l2.ui_queue))) { |
| 600 | memcpy(skb_push(skb, i), header, i); |
| 601 | enqueue_ui(st, skb); |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | static void |
| 606 | l2_send_ui(struct FsmInst *fi, int event, void *arg) |
| 607 | { |
| 608 | struct PStack *st = fi->userdata; |
| 609 | struct sk_buff *skb = arg; |
| 610 | |
| 611 | skb_queue_tail(&st->l2.ui_queue, skb); |
| 612 | tx_ui(st); |
| 613 | } |
| 614 | |
| 615 | static void |
| 616 | l2_got_ui(struct FsmInst *fi, int event, void *arg) |
| 617 | { |
| 618 | struct PStack *st = fi->userdata; |
| 619 | struct sk_buff *skb = arg; |
| 620 | |
| 621 | skb_pull(skb, l2headersize(&st->l2, 1)); |
| 622 | st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb); |
| 623 | /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| 624 | * in states 1-3 for broadcast |
| 625 | */ |
| 626 | |
| 627 | |
| 628 | } |
| 629 | |
| 630 | static void |
| 631 | l2_establish(struct FsmInst *fi, int event, void *arg) |
| 632 | { |
| 633 | struct PStack *st = fi->userdata; |
| 634 | |
| 635 | establishlink(fi); |
| 636 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); |
| 637 | } |
| 638 | |
| 639 | static void |
| 640 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) |
| 641 | { |
| 642 | struct PStack *st = fi->userdata; |
| 643 | |
| 644 | skb_queue_purge(&st->l2.i_queue); |
| 645 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); |
| 646 | test_and_clear_bit(FLG_PEND_REL, &st->l2.flag); |
| 647 | } |
| 648 | |
| 649 | static void |
| 650 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) |
| 651 | { |
| 652 | struct PStack *st = fi->userdata; |
| 653 | |
| 654 | skb_queue_purge(&st->l2.i_queue); |
| 655 | establishlink(fi); |
| 656 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); |
| 657 | } |
| 658 | |
| 659 | static void |
| 660 | l2_release(struct FsmInst *fi, int event, void *arg) |
| 661 | { |
| 662 | struct PStack *st = fi->userdata; |
| 663 | |
| 664 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); |
| 665 | } |
| 666 | |
| 667 | static void |
| 668 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) |
| 669 | { |
| 670 | struct PStack *st = fi->userdata; |
| 671 | |
| 672 | test_and_set_bit(FLG_PEND_REL, &st->l2.flag); |
| 673 | } |
| 674 | |
| 675 | static void |
| 676 | l2_disconnect(struct FsmInst *fi, int event, void *arg) |
| 677 | { |
| 678 | struct PStack *st = fi->userdata; |
| 679 | |
| 680 | skb_queue_purge(&st->l2.i_queue); |
| 681 | freewin(st); |
| 682 | FsmChangeState(fi, ST_L2_6); |
| 683 | st->l2.rc = 0; |
| 684 | send_uframe(st, DISC | 0x10, CMD); |
| 685 | FsmDelTimer(&st->l2.t203, 1); |
| 686 | restart_t200(st, 2); |
| 687 | } |
| 688 | |
| 689 | static void |
| 690 | l2_start_multi(struct FsmInst *fi, int event, void *arg) |
| 691 | { |
| 692 | struct PStack *st = fi->userdata; |
| 693 | struct sk_buff *skb = arg; |
| 694 | |
| 695 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); |
| 696 | |
| 697 | clear_exception(&st->l2); |
| 698 | st->l2.vs = 0; |
| 699 | st->l2.va = 0; |
| 700 | st->l2.vr = 0; |
| 701 | st->l2.sow = 0; |
| 702 | FsmChangeState(fi, ST_L2_7); |
| 703 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3); |
| 704 | |
| 705 | st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL); |
| 706 | } |
| 707 | |
| 708 | static void |
| 709 | l2_send_UA(struct FsmInst *fi, int event, void *arg) |
| 710 | { |
| 711 | struct PStack *st = fi->userdata; |
| 712 | struct sk_buff *skb = arg; |
| 713 | |
| 714 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); |
| 715 | } |
| 716 | |
| 717 | static void |
| 718 | l2_send_DM(struct FsmInst *fi, int event, void *arg) |
| 719 | { |
| 720 | struct PStack *st = fi->userdata; |
| 721 | struct sk_buff *skb = arg; |
| 722 | |
| 723 | send_uframe(st, DM | get_PollFlagFree(st, skb), RSP); |
| 724 | } |
| 725 | |
| 726 | static void |
| 727 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) |
| 728 | { |
| 729 | struct PStack *st = fi->userdata; |
| 730 | struct sk_buff *skb = arg; |
| 731 | int est = 0, state; |
| 732 | |
| 733 | state = fi->state; |
| 734 | |
| 735 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); |
| 736 | |
| 737 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F'); |
| 738 | |
| 739 | if (st->l2.vs != st->l2.va) { |
| 740 | skb_queue_purge(&st->l2.i_queue); |
| 741 | est = 1; |
| 742 | } |
| 743 | |
| 744 | clear_exception(&st->l2); |
| 745 | st->l2.vs = 0; |
| 746 | st->l2.va = 0; |
| 747 | st->l2.vr = 0; |
| 748 | st->l2.sow = 0; |
| 749 | FsmChangeState(fi, ST_L2_7); |
| 750 | stop_t200(st, 3); |
| 751 | FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3); |
| 752 | |
| 753 | if (est) |
| 754 | st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL); |
| 755 | |
| 756 | if ((ST_L2_7==state) || (ST_L2_8 == state)) |
| 757 | if (skb_queue_len(&st->l2.i_queue) && cansend(st)) |
| 758 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 759 | } |
| 760 | |
| 761 | static void |
| 762 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) |
| 763 | { |
| 764 | struct PStack *st = fi->userdata; |
| 765 | struct sk_buff *skb = arg; |
| 766 | |
| 767 | FsmChangeState(fi, ST_L2_4); |
| 768 | FsmDelTimer(&st->l2.t203, 3); |
| 769 | stop_t200(st, 4); |
| 770 | |
| 771 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); |
| 772 | |
| 773 | skb_queue_purge(&st->l2.i_queue); |
| 774 | freewin(st); |
| 775 | lapb_dl_release_l2l3(st, INDICATION); |
| 776 | } |
| 777 | |
| 778 | static void |
| 779 | l2_connected(struct FsmInst *fi, int event, void *arg) |
| 780 | { |
| 781 | struct PStack *st = fi->userdata; |
| 782 | struct sk_buff *skb = arg; |
| 783 | int pr=-1; |
| 784 | |
| 785 | if (!get_PollFlag(st, skb)) { |
| 786 | l2_mdl_error_ua(fi, event, arg); |
| 787 | return; |
| 788 | } |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 789 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag)) |
| 792 | l2_disconnect(fi, event, arg); |
| 793 | |
| 794 | if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) { |
| 795 | pr = DL_ESTABLISH | CONFIRM; |
| 796 | } else if (st->l2.vs != st->l2.va) { |
| 797 | skb_queue_purge(&st->l2.i_queue); |
| 798 | pr = DL_ESTABLISH | INDICATION; |
| 799 | } |
| 800 | |
| 801 | stop_t200(st, 5); |
| 802 | |
| 803 | st->l2.vr = 0; |
| 804 | st->l2.vs = 0; |
| 805 | st->l2.va = 0; |
| 806 | st->l2.sow = 0; |
| 807 | FsmChangeState(fi, ST_L2_7); |
| 808 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4); |
| 809 | |
| 810 | if (pr != -1) |
| 811 | st->l2.l2l3(st, pr, NULL); |
| 812 | |
| 813 | if (skb_queue_len(&st->l2.i_queue) && cansend(st)) |
| 814 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 815 | } |
| 816 | |
| 817 | static void |
| 818 | l2_released(struct FsmInst *fi, int event, void *arg) |
| 819 | { |
| 820 | struct PStack *st = fi->userdata; |
| 821 | struct sk_buff *skb = arg; |
| 822 | |
| 823 | if (!get_PollFlag(st, skb)) { |
| 824 | l2_mdl_error_ua(fi, event, arg); |
| 825 | return; |
| 826 | } |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 827 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
| 829 | stop_t200(st, 6); |
| 830 | lapb_dl_release_l2l3(st, CONFIRM); |
| 831 | FsmChangeState(fi, ST_L2_4); |
| 832 | } |
| 833 | |
| 834 | static void |
| 835 | l2_reestablish(struct FsmInst *fi, int event, void *arg) |
| 836 | { |
| 837 | struct PStack *st = fi->userdata; |
| 838 | struct sk_buff *skb = arg; |
| 839 | |
| 840 | if (!get_PollFlagFree(st, skb)) { |
| 841 | establishlink(fi); |
| 842 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | static void |
| 847 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) |
| 848 | { |
| 849 | struct PStack *st = fi->userdata; |
| 850 | struct sk_buff *skb = arg; |
| 851 | |
| 852 | if (get_PollFlagFree(st, skb)) { |
| 853 | stop_t200(st, 7); |
| 854 | if (!test_bit(FLG_L3_INIT, &st->l2.flag)) |
| 855 | skb_queue_purge(&st->l2.i_queue); |
| 856 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 857 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); |
| 858 | st5_dl_release_l2l3(st); |
| 859 | FsmChangeState(fi, ST_L2_4); |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | static void |
| 864 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) |
| 865 | { |
| 866 | struct PStack *st = fi->userdata; |
| 867 | struct sk_buff *skb = arg; |
| 868 | |
| 869 | if (get_PollFlagFree(st, skb)) { |
| 870 | stop_t200(st, 8); |
| 871 | lapb_dl_release_l2l3(st, CONFIRM); |
| 872 | FsmChangeState(fi, ST_L2_4); |
| 873 | } |
| 874 | } |
| 875 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 876 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf) |
| 878 | { |
| 879 | struct sk_buff *skb; |
| 880 | struct Layer2 *l2; |
| 881 | u_char tmp[MAX_HEADER_LEN]; |
| 882 | int i; |
| 883 | |
| 884 | l2 = &st->l2; |
| 885 | i = sethdraddr(l2, tmp, cr); |
| 886 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 887 | tmp[i++] = typ; |
| 888 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); |
| 889 | } else |
| 890 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); |
| 891 | if (!(skb = alloc_skb(i, GFP_ATOMIC))) { |
| 892 | printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n"); |
| 893 | return; |
| 894 | } |
| 895 | memcpy(skb_put(skb, i), tmp, i); |
| 896 | enqueue_super(st, skb); |
| 897 | } |
| 898 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 899 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | enquiry_response(struct PStack *st) |
| 901 | { |
| 902 | if (test_bit(FLG_OWN_BUSY, &st->l2.flag)) |
| 903 | enquiry_cr(st, RNR, RSP, 1); |
| 904 | else |
| 905 | enquiry_cr(st, RR, RSP, 1); |
| 906 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); |
| 907 | } |
| 908 | |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 909 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | transmit_enquiry(struct PStack *st) |
| 911 | { |
| 912 | if (test_bit(FLG_OWN_BUSY, &st->l2.flag)) |
| 913 | enquiry_cr(st, RNR, CMD, 1); |
| 914 | else |
| 915 | enquiry_cr(st, RR, CMD, 1); |
| 916 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); |
| 917 | start_t200(st, 9); |
| 918 | } |
| 919 | |
| 920 | |
| 921 | static void |
| 922 | nrerrorrecovery(struct FsmInst *fi) |
| 923 | { |
| 924 | struct PStack *st = fi->userdata; |
| 925 | |
| 926 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J'); |
| 927 | establishlink(fi); |
| 928 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); |
| 929 | } |
| 930 | |
| 931 | static void |
| 932 | invoke_retransmission(struct PStack *st, unsigned int nr) |
| 933 | { |
| 934 | struct Layer2 *l2 = &st->l2; |
| 935 | u_int p1; |
| 936 | u_long flags; |
| 937 | |
| 938 | spin_lock_irqsave(&l2->lock, flags); |
| 939 | if (l2->vs != nr) { |
| 940 | while (l2->vs != nr) { |
| 941 | (l2->vs)--; |
| 942 | if(test_bit(FLG_MOD128, &l2->flag)) { |
| 943 | l2->vs %= 128; |
| 944 | p1 = (l2->vs - l2->va) % 128; |
| 945 | } else { |
| 946 | l2->vs %= 8; |
| 947 | p1 = (l2->vs - l2->va) % 8; |
| 948 | } |
| 949 | p1 = (p1 + l2->sow) % l2->window; |
| 950 | if (test_bit(FLG_LAPB, &l2->flag)) |
| 951 | st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0); |
| 952 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); |
| 953 | l2->windowar[p1] = NULL; |
| 954 | } |
| 955 | spin_unlock_irqrestore(&l2->lock, flags); |
| 956 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 957 | return; |
| 958 | } |
| 959 | spin_unlock_irqrestore(&l2->lock, flags); |
| 960 | } |
| 961 | |
| 962 | static void |
| 963 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) |
| 964 | { |
| 965 | struct PStack *st = fi->userdata; |
| 966 | struct sk_buff *skb = arg; |
| 967 | int PollFlag, rsp, typ = RR; |
| 968 | unsigned int nr; |
| 969 | struct Layer2 *l2 = &st->l2; |
| 970 | |
| 971 | rsp = *skb->data & 0x2; |
| 972 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 973 | rsp = !rsp; |
| 974 | |
| 975 | skb_pull(skb, l2addrsize(l2)); |
| 976 | if (IsRNR(skb->data, st)) { |
| 977 | set_peer_busy(l2); |
| 978 | typ = RNR; |
| 979 | } else |
| 980 | clear_peer_busy(l2); |
| 981 | if (IsREJ(skb->data, st)) |
| 982 | typ = REJ; |
| 983 | |
| 984 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 985 | PollFlag = (skb->data[1] & 0x1) == 0x1; |
| 986 | nr = skb->data[1] >> 1; |
| 987 | } else { |
| 988 | PollFlag = (skb->data[0] & 0x10); |
| 989 | nr = (skb->data[0] >> 5) & 0x7; |
| 990 | } |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 991 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
| 993 | if (PollFlag) { |
| 994 | if (rsp) |
| 995 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A'); |
| 996 | else |
| 997 | enquiry_response(st); |
| 998 | } |
| 999 | if (legalnr(st, nr)) { |
| 1000 | if (typ == REJ) { |
| 1001 | setva(st, nr); |
| 1002 | invoke_retransmission(st, nr); |
| 1003 | stop_t200(st, 10); |
| 1004 | if (FsmAddTimer(&st->l2.t203, st->l2.T203, |
| 1005 | EV_L2_T203, NULL, 6)) |
| 1006 | l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ"); |
| 1007 | } else if ((nr == l2->vs) && (typ == RR)) { |
| 1008 | setva(st, nr); |
| 1009 | stop_t200(st, 11); |
| 1010 | FsmRestartTimer(&st->l2.t203, st->l2.T203, |
| 1011 | EV_L2_T203, NULL, 7); |
| 1012 | } else if ((l2->va != nr) || (typ == RNR)) { |
| 1013 | setva(st, nr); |
| 1014 | if(typ != RR) FsmDelTimer(&st->l2.t203, 9); |
| 1015 | restart_t200(st, 12); |
| 1016 | } |
| 1017 | if (skb_queue_len(&st->l2.i_queue) && (typ == RR)) |
| 1018 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 1019 | } else |
| 1020 | nrerrorrecovery(fi); |
| 1021 | } |
| 1022 | |
| 1023 | static void |
| 1024 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) |
| 1025 | { |
| 1026 | struct PStack *st = fi->userdata; |
| 1027 | struct sk_buff *skb = arg; |
| 1028 | |
| 1029 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 1030 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); |
| 1031 | if (!test_bit(FLG_L3_INIT, &st->l2.flag)) |
| 1032 | skb_queue_tail(&st->l2.i_queue, skb); |
| 1033 | else |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1034 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | } |
| 1036 | |
| 1037 | static void |
| 1038 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) |
| 1039 | { |
| 1040 | struct PStack *st = fi->userdata; |
| 1041 | struct sk_buff *skb = arg; |
| 1042 | |
| 1043 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 1044 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); |
| 1045 | skb_queue_tail(&st->l2.i_queue, skb); |
| 1046 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 1047 | } |
| 1048 | |
| 1049 | static void |
| 1050 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) |
| 1051 | { |
| 1052 | struct PStack *st = fi->userdata; |
| 1053 | struct sk_buff *skb = arg; |
| 1054 | |
| 1055 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 1056 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); |
| 1057 | skb_queue_tail(&st->l2.i_queue, skb); |
| 1058 | } |
| 1059 | |
| 1060 | static void |
| 1061 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) |
| 1062 | { |
| 1063 | struct PStack *st = fi->userdata; |
| 1064 | struct sk_buff *skb = arg; |
| 1065 | struct Layer2 *l2 = &(st->l2); |
| 1066 | int PollFlag, ns, i; |
| 1067 | unsigned int nr; |
| 1068 | |
| 1069 | i = l2addrsize(l2); |
| 1070 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1071 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); |
| 1072 | ns = skb->data[i] >> 1; |
| 1073 | nr = (skb->data[i + 1] >> 1) & 0x7f; |
| 1074 | } else { |
| 1075 | PollFlag = (skb->data[i] & 0x10); |
| 1076 | ns = (skb->data[i] >> 1) & 0x7; |
| 1077 | nr = (skb->data[i] >> 5) & 0x7; |
| 1078 | } |
| 1079 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1080 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | if(PollFlag) enquiry_response(st); |
| 1082 | } else if (l2->vr == ns) { |
| 1083 | (l2->vr)++; |
| 1084 | if(test_bit(FLG_MOD128, &l2->flag)) |
| 1085 | l2->vr %= 128; |
| 1086 | else |
| 1087 | l2->vr %= 8; |
| 1088 | test_and_clear_bit(FLG_REJEXC, &l2->flag); |
| 1089 | |
| 1090 | if (PollFlag) |
| 1091 | enquiry_response(st); |
| 1092 | else |
| 1093 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); |
| 1094 | skb_pull(skb, l2headersize(l2, 0)); |
| 1095 | st->l2.l2l3(st, DL_DATA | INDICATION, skb); |
| 1096 | } else { |
| 1097 | /* n(s)!=v(r) */ |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1098 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { |
| 1100 | if (PollFlag) |
| 1101 | enquiry_response(st); |
| 1102 | } else { |
| 1103 | enquiry_cr(st, REJ, RSP, PollFlag); |
| 1104 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | if (legalnr(st, nr)) { |
| 1109 | if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) { |
| 1110 | if (nr == st->l2.vs) { |
| 1111 | stop_t200(st, 13); |
| 1112 | FsmRestartTimer(&st->l2.t203, st->l2.T203, |
| 1113 | EV_L2_T203, NULL, 7); |
| 1114 | } else if (nr != st->l2.va) |
| 1115 | restart_t200(st, 14); |
| 1116 | } |
| 1117 | setva(st, nr); |
| 1118 | } else { |
| 1119 | nrerrorrecovery(fi); |
| 1120 | return; |
| 1121 | } |
| 1122 | |
| 1123 | if (skb_queue_len(&st->l2.i_queue) && (fi->state == ST_L2_7)) |
| 1124 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 1125 | if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag)) |
| 1126 | enquiry_cr(st, RR, RSP, 0); |
| 1127 | } |
| 1128 | |
| 1129 | static void |
| 1130 | l2_got_tei(struct FsmInst *fi, int event, void *arg) |
| 1131 | { |
| 1132 | struct PStack *st = fi->userdata; |
| 1133 | |
| 1134 | st->l2.tei = (long) arg; |
| 1135 | |
| 1136 | if (fi->state == ST_L2_3) { |
| 1137 | establishlink(fi); |
| 1138 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); |
| 1139 | } else |
| 1140 | FsmChangeState(fi, ST_L2_4); |
| 1141 | if (skb_queue_len(&st->l2.ui_queue)) |
| 1142 | tx_ui(st); |
| 1143 | } |
| 1144 | |
| 1145 | static void |
| 1146 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1147 | { |
| 1148 | struct PStack *st = fi->userdata; |
| 1149 | |
| 1150 | if (test_bit(FLG_LAPD, &st->l2.flag) && |
| 1151 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { |
| 1152 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); |
| 1153 | } else if (st->l2.rc == st->l2.N200) { |
| 1154 | FsmChangeState(fi, ST_L2_4); |
| 1155 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); |
| 1156 | skb_queue_purge(&st->l2.i_queue); |
| 1157 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G'); |
| 1158 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 1159 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); |
| 1160 | st5_dl_release_l2l3(st); |
| 1161 | } else { |
| 1162 | st->l2.rc++; |
| 1163 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); |
| 1164 | send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) |
| 1165 | | 0x10, CMD); |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | static void |
| 1170 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1171 | { |
| 1172 | struct PStack *st = fi->userdata; |
| 1173 | |
| 1174 | if (test_bit(FLG_LAPD, &st->l2.flag) && |
| 1175 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { |
| 1176 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); |
| 1177 | } else if (st->l2.rc == st->l2.N200) { |
| 1178 | FsmChangeState(fi, ST_L2_4); |
| 1179 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); |
| 1180 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H'); |
| 1181 | lapb_dl_release_l2l3(st, CONFIRM); |
| 1182 | } else { |
| 1183 | st->l2.rc++; |
| 1184 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, |
| 1185 | NULL, 9); |
| 1186 | send_uframe(st, DISC | 0x10, CMD); |
| 1187 | } |
| 1188 | } |
| 1189 | |
| 1190 | static void |
| 1191 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1192 | { |
| 1193 | struct PStack *st = fi->userdata; |
| 1194 | |
| 1195 | if (test_bit(FLG_LAPD, &st->l2.flag) && |
| 1196 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { |
| 1197 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); |
| 1198 | return; |
| 1199 | } |
| 1200 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); |
| 1201 | st->l2.rc = 0; |
| 1202 | FsmChangeState(fi, ST_L2_8); |
| 1203 | |
| 1204 | transmit_enquiry(st); |
| 1205 | st->l2.rc++; |
| 1206 | } |
| 1207 | |
| 1208 | static void |
| 1209 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) |
| 1210 | { |
| 1211 | struct PStack *st = fi->userdata; |
| 1212 | |
| 1213 | if (test_bit(FLG_LAPD, &st->l2.flag) && |
| 1214 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { |
| 1215 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); |
| 1216 | return; |
| 1217 | } |
| 1218 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); |
| 1219 | if (st->l2.rc == st->l2.N200) { |
| 1220 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I'); |
| 1221 | establishlink(fi); |
| 1222 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); |
| 1223 | } else { |
| 1224 | transmit_enquiry(st); |
| 1225 | st->l2.rc++; |
| 1226 | } |
| 1227 | } |
| 1228 | |
| 1229 | static void |
| 1230 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) |
| 1231 | { |
| 1232 | struct PStack *st = fi->userdata; |
| 1233 | |
| 1234 | if (test_bit(FLG_LAPD, &st->l2.flag) && |
| 1235 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { |
| 1236 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9); |
| 1237 | return; |
| 1238 | } |
| 1239 | FsmChangeState(fi, ST_L2_8); |
| 1240 | transmit_enquiry(st); |
| 1241 | st->l2.rc = 0; |
| 1242 | } |
| 1243 | |
| 1244 | static void |
| 1245 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) |
| 1246 | { |
| 1247 | struct PStack *st = fi->userdata; |
| 1248 | struct sk_buff *skb, *oskb; |
| 1249 | struct Layer2 *l2 = &st->l2; |
| 1250 | u_char header[MAX_HEADER_LEN]; |
| 1251 | int i; |
| 1252 | int unsigned p1; |
| 1253 | u_long flags; |
| 1254 | |
| 1255 | if (!cansend(st)) |
| 1256 | return; |
| 1257 | |
| 1258 | skb = skb_dequeue(&l2->i_queue); |
| 1259 | if (!skb) |
| 1260 | return; |
| 1261 | |
| 1262 | spin_lock_irqsave(&l2->lock, flags); |
| 1263 | if(test_bit(FLG_MOD128, &l2->flag)) |
| 1264 | p1 = (l2->vs - l2->va) % 128; |
| 1265 | else |
| 1266 | p1 = (l2->vs - l2->va) % 8; |
| 1267 | p1 = (p1 + l2->sow) % l2->window; |
| 1268 | if (l2->windowar[p1]) { |
| 1269 | printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n", |
| 1270 | p1); |
| 1271 | dev_kfree_skb(l2->windowar[p1]); |
| 1272 | } |
| 1273 | l2->windowar[p1] = skb_clone(skb, GFP_ATOMIC); |
| 1274 | |
| 1275 | i = sethdraddr(&st->l2, header, CMD); |
| 1276 | |
| 1277 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1278 | header[i++] = l2->vs << 1; |
| 1279 | header[i++] = l2->vr << 1; |
| 1280 | l2->vs = (l2->vs + 1) % 128; |
| 1281 | } else { |
| 1282 | header[i++] = (l2->vr << 5) | (l2->vs << 1); |
| 1283 | l2->vs = (l2->vs + 1) % 8; |
| 1284 | } |
| 1285 | spin_unlock_irqrestore(&l2->lock, flags); |
| 1286 | p1 = skb->data - skb->head; |
| 1287 | if (p1 >= i) |
| 1288 | memcpy(skb_push(skb, i), header, i); |
| 1289 | else { |
| 1290 | printk(KERN_WARNING |
| 1291 | "isdl2 pull_iqueue skb header(%d/%d) too short\n", i, p1); |
| 1292 | oskb = skb; |
| 1293 | skb = alloc_skb(oskb->len + i, GFP_ATOMIC); |
| 1294 | memcpy(skb_put(skb, i), header, i); |
| 1295 | memcpy(skb_put(skb, oskb->len), oskb->data, oskb->len); |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1296 | dev_kfree_skb(oskb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | } |
| 1298 | st->l2.l2l1(st, PH_PULL | INDICATION, skb); |
| 1299 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); |
| 1300 | if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) { |
| 1301 | FsmDelTimer(&st->l2.t203, 13); |
| 1302 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11); |
| 1303 | } |
| 1304 | if (skb_queue_len(&l2->i_queue) && cansend(st)) |
| 1305 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 1306 | } |
| 1307 | |
| 1308 | static void |
| 1309 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) |
| 1310 | { |
| 1311 | struct PStack *st = fi->userdata; |
| 1312 | struct sk_buff *skb = arg; |
| 1313 | int PollFlag, rsp, rnr = 0; |
| 1314 | unsigned int nr; |
| 1315 | struct Layer2 *l2 = &st->l2; |
| 1316 | |
| 1317 | rsp = *skb->data & 0x2; |
| 1318 | if (test_bit(FLG_ORIG, &l2->flag)) |
| 1319 | rsp = !rsp; |
| 1320 | |
| 1321 | skb_pull(skb, l2addrsize(l2)); |
| 1322 | |
| 1323 | if (IsRNR(skb->data, st)) { |
| 1324 | set_peer_busy(l2); |
| 1325 | rnr = 1; |
| 1326 | } else |
| 1327 | clear_peer_busy(l2); |
| 1328 | |
| 1329 | if (test_bit(FLG_MOD128, &l2->flag)) { |
| 1330 | PollFlag = (skb->data[1] & 0x1) == 0x1; |
| 1331 | nr = skb->data[1] >> 1; |
| 1332 | } else { |
| 1333 | PollFlag = (skb->data[0] & 0x10); |
| 1334 | nr = (skb->data[0] >> 5) & 0x7; |
| 1335 | } |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1336 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | |
| 1338 | if (rsp && PollFlag) { |
| 1339 | if (legalnr(st, nr)) { |
| 1340 | if (rnr) { |
| 1341 | restart_t200(st, 15); |
| 1342 | } else { |
| 1343 | stop_t200(st, 16); |
| 1344 | FsmAddTimer(&l2->t203, l2->T203, |
| 1345 | EV_L2_T203, NULL, 5); |
| 1346 | setva(st, nr); |
| 1347 | } |
| 1348 | invoke_retransmission(st, nr); |
| 1349 | FsmChangeState(fi, ST_L2_7); |
| 1350 | if (skb_queue_len(&l2->i_queue) && cansend(st)) |
| 1351 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
| 1352 | } else |
| 1353 | nrerrorrecovery(fi); |
| 1354 | } else { |
| 1355 | if (!rsp && PollFlag) |
| 1356 | enquiry_response(st); |
| 1357 | if (legalnr(st, nr)) { |
| 1358 | setva(st, nr); |
| 1359 | } else |
| 1360 | nrerrorrecovery(fi); |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | static void |
| 1365 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) |
| 1366 | { |
| 1367 | struct PStack *st = fi->userdata; |
| 1368 | struct sk_buff *skb = arg; |
| 1369 | |
| 1370 | skb_pull(skb, l2addrsize(&st->l2) + 1); |
| 1371 | |
| 1372 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ |
| 1373 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { |
| 1374 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K'); |
| 1375 | establishlink(fi); |
| 1376 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); |
| 1377 | } |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1378 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | } |
| 1380 | |
| 1381 | static void |
| 1382 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1383 | { |
| 1384 | struct PStack *st = fi->userdata; |
| 1385 | |
| 1386 | skb_queue_purge(&st->l2.ui_queue); |
| 1387 | st->l2.tei = -1; |
| 1388 | FsmChangeState(fi, ST_L2_1); |
| 1389 | } |
| 1390 | |
| 1391 | static void |
| 1392 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1393 | { |
| 1394 | struct PStack *st = fi->userdata; |
| 1395 | |
| 1396 | skb_queue_purge(&st->l2.ui_queue); |
| 1397 | st->l2.tei = -1; |
| 1398 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); |
| 1399 | FsmChangeState(fi, ST_L2_1); |
| 1400 | } |
| 1401 | |
| 1402 | static void |
| 1403 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1404 | { |
| 1405 | struct PStack *st = fi->userdata; |
| 1406 | |
| 1407 | skb_queue_purge(&st->l2.i_queue); |
| 1408 | skb_queue_purge(&st->l2.ui_queue); |
| 1409 | freewin(st); |
| 1410 | st->l2.tei = -1; |
| 1411 | stop_t200(st, 17); |
| 1412 | st5_dl_release_l2l3(st); |
| 1413 | FsmChangeState(fi, ST_L2_1); |
| 1414 | } |
| 1415 | |
| 1416 | static void |
| 1417 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1418 | { |
| 1419 | struct PStack *st = fi->userdata; |
| 1420 | |
| 1421 | skb_queue_purge(&st->l2.ui_queue); |
| 1422 | st->l2.tei = -1; |
| 1423 | stop_t200(st, 18); |
| 1424 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); |
| 1425 | FsmChangeState(fi, ST_L2_1); |
| 1426 | } |
| 1427 | |
| 1428 | static void |
| 1429 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) |
| 1430 | { |
| 1431 | struct PStack *st = fi->userdata; |
| 1432 | |
| 1433 | skb_queue_purge(&st->l2.i_queue); |
| 1434 | skb_queue_purge(&st->l2.ui_queue); |
| 1435 | freewin(st); |
| 1436 | st->l2.tei = -1; |
| 1437 | stop_t200(st, 17); |
| 1438 | FsmDelTimer(&st->l2.t203, 19); |
| 1439 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); |
| 1440 | FsmChangeState(fi, ST_L2_1); |
| 1441 | } |
| 1442 | |
| 1443 | static void |
| 1444 | l2_st14_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1445 | { |
| 1446 | struct PStack *st = fi->userdata; |
| 1447 | |
| 1448 | skb_queue_purge(&st->l2.i_queue); |
| 1449 | skb_queue_purge(&st->l2.ui_queue); |
| 1450 | if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag)) |
| 1451 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); |
| 1452 | } |
| 1453 | |
| 1454 | static void |
| 1455 | l2_st5_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1456 | { |
| 1457 | struct PStack *st = fi->userdata; |
| 1458 | |
| 1459 | skb_queue_purge(&st->l2.i_queue); |
| 1460 | skb_queue_purge(&st->l2.ui_queue); |
| 1461 | freewin(st); |
| 1462 | stop_t200(st, 19); |
| 1463 | st5_dl_release_l2l3(st); |
| 1464 | FsmChangeState(fi, ST_L2_4); |
| 1465 | } |
| 1466 | |
| 1467 | static void |
| 1468 | l2_st6_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1469 | { |
| 1470 | struct PStack *st = fi->userdata; |
| 1471 | |
| 1472 | skb_queue_purge(&st->l2.ui_queue); |
| 1473 | stop_t200(st, 20); |
| 1474 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); |
| 1475 | FsmChangeState(fi, ST_L2_4); |
| 1476 | } |
| 1477 | |
| 1478 | static void |
| 1479 | l2_persistant_da(struct FsmInst *fi, int event, void *arg) |
| 1480 | { |
| 1481 | struct PStack *st = fi->userdata; |
| 1482 | |
| 1483 | skb_queue_purge(&st->l2.i_queue); |
| 1484 | skb_queue_purge(&st->l2.ui_queue); |
| 1485 | freewin(st); |
| 1486 | stop_t200(st, 19); |
| 1487 | FsmDelTimer(&st->l2.t203, 19); |
| 1488 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); |
| 1489 | FsmChangeState(fi, ST_L2_4); |
| 1490 | } |
| 1491 | |
| 1492 | static void |
| 1493 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) |
| 1494 | { |
| 1495 | struct PStack *st = fi->userdata; |
| 1496 | |
| 1497 | if(!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) { |
| 1498 | enquiry_cr(st, RNR, RSP, 0); |
| 1499 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | static void |
| 1504 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) |
| 1505 | { |
| 1506 | struct PStack *st = fi->userdata; |
| 1507 | |
| 1508 | if(!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) { |
| 1509 | enquiry_cr(st, RR, RSP, 0); |
| 1510 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | static void |
| 1515 | l2_frame_error(struct FsmInst *fi, int event, void *arg) |
| 1516 | { |
| 1517 | struct PStack *st = fi->userdata; |
| 1518 | |
| 1519 | st->ma.layer(st, MDL_ERROR | INDICATION, arg); |
| 1520 | } |
| 1521 | |
| 1522 | static void |
| 1523 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) |
| 1524 | { |
| 1525 | struct PStack *st = fi->userdata; |
| 1526 | |
| 1527 | st->ma.layer(st, MDL_ERROR | INDICATION, arg); |
| 1528 | establishlink(fi); |
| 1529 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); |
| 1530 | } |
| 1531 | |
| 1532 | static struct FsmNode L2FnList[] __initdata = |
| 1533 | { |
| 1534 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, |
| 1535 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, |
| 1536 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, |
| 1537 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, |
| 1538 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, |
| 1539 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, |
| 1540 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, |
| 1541 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, |
| 1542 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, |
| 1543 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, |
| 1544 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, |
| 1545 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, |
| 1546 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, |
| 1547 | {ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign}, |
| 1548 | {ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui}, |
| 1549 | {ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui}, |
| 1550 | {ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui}, |
| 1551 | {ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui}, |
| 1552 | {ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui}, |
| 1553 | {ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui}, |
| 1554 | {ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui}, |
| 1555 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, |
| 1556 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, |
| 1557 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, |
| 1558 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, |
| 1559 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, |
| 1560 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, |
| 1561 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, |
| 1562 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, |
| 1563 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, |
| 1564 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, |
| 1565 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, |
| 1566 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, |
| 1567 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, |
| 1568 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, |
| 1569 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, |
| 1570 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, |
| 1571 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, |
| 1572 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, |
| 1573 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, |
| 1574 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, |
| 1575 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, |
| 1576 | {ST_L2_5, EV_L2_UA, l2_connected}, |
| 1577 | {ST_L2_6, EV_L2_UA, l2_released}, |
| 1578 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, |
| 1579 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, |
| 1580 | {ST_L2_4, EV_L2_DM, l2_reestablish}, |
| 1581 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, |
| 1582 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, |
| 1583 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, |
| 1584 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, |
| 1585 | {ST_L2_1, EV_L2_UI, l2_got_ui}, |
| 1586 | {ST_L2_2, EV_L2_UI, l2_got_ui}, |
| 1587 | {ST_L2_3, EV_L2_UI, l2_got_ui}, |
| 1588 | {ST_L2_4, EV_L2_UI, l2_got_ui}, |
| 1589 | {ST_L2_5, EV_L2_UI, l2_got_ui}, |
| 1590 | {ST_L2_6, EV_L2_UI, l2_got_ui}, |
| 1591 | {ST_L2_7, EV_L2_UI, l2_got_ui}, |
| 1592 | {ST_L2_8, EV_L2_UI, l2_got_ui}, |
| 1593 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, |
| 1594 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, |
| 1595 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, |
| 1596 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, |
| 1597 | {ST_L2_7, EV_L2_I, l2_got_iframe}, |
| 1598 | {ST_L2_8, EV_L2_I, l2_got_iframe}, |
| 1599 | {ST_L2_5, EV_L2_T200, l2_st5_tout_200}, |
| 1600 | {ST_L2_6, EV_L2_T200, l2_st6_tout_200}, |
| 1601 | {ST_L2_7, EV_L2_T200, l2_st7_tout_200}, |
| 1602 | {ST_L2_8, EV_L2_T200, l2_st8_tout_200}, |
| 1603 | {ST_L2_7, EV_L2_T203, l2_st7_tout_203}, |
| 1604 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, |
| 1605 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, |
| 1606 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, |
| 1607 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, |
| 1608 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, |
| 1609 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, |
| 1610 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, |
| 1611 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, |
| 1612 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, |
| 1613 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, |
| 1614 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistant_da}, |
| 1615 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, |
| 1616 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, |
| 1617 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistant_da}, |
| 1618 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistant_da}, |
| 1619 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistant_da}, |
| 1620 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistant_da}, |
| 1621 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistant_da}, |
| 1622 | }; |
| 1623 | |
| 1624 | #define L2_FN_COUNT (sizeof(L2FnList)/sizeof(struct FsmNode)) |
| 1625 | |
| 1626 | static void |
| 1627 | isdnl2_l1l2(struct PStack *st, int pr, void *arg) |
| 1628 | { |
| 1629 | struct sk_buff *skb = arg; |
| 1630 | u_char *datap; |
| 1631 | int ret = 1, len; |
| 1632 | int c = 0; |
| 1633 | |
| 1634 | switch (pr) { |
| 1635 | case (PH_DATA | INDICATION): |
| 1636 | datap = skb->data; |
| 1637 | len = l2addrsize(&st->l2); |
| 1638 | if (skb->len > len) |
| 1639 | datap += len; |
| 1640 | else { |
| 1641 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N'); |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1642 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | return; |
| 1644 | } |
| 1645 | if (!(*datap & 1)) { /* I-Frame */ |
| 1646 | if(!(c = iframe_error(st, skb))) |
| 1647 | ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb); |
| 1648 | } else if (IsSFrame(datap, st)) { /* S-Frame */ |
| 1649 | if(!(c = super_error(st, skb))) |
| 1650 | ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb); |
| 1651 | } else if (IsUI(datap)) { |
| 1652 | if(!(c = UI_error(st, skb))) |
| 1653 | ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb); |
| 1654 | } else if (IsSABME(datap, st)) { |
| 1655 | if(!(c = unnum_error(st, skb, CMD))) |
| 1656 | ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb); |
| 1657 | } else if (IsUA(datap)) { |
| 1658 | if(!(c = unnum_error(st, skb, RSP))) |
| 1659 | ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb); |
| 1660 | } else if (IsDISC(datap)) { |
| 1661 | if(!(c = unnum_error(st, skb, CMD))) |
| 1662 | ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb); |
| 1663 | } else if (IsDM(datap)) { |
| 1664 | if(!(c = unnum_error(st, skb, RSP))) |
| 1665 | ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb); |
| 1666 | } else if (IsFRMR(datap)) { |
| 1667 | if(!(c = FRMR_error(st,skb))) |
| 1668 | ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb); |
| 1669 | } else { |
| 1670 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L'); |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1671 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | ret = 0; |
| 1673 | } |
| 1674 | if(c) { |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1675 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c); |
| 1677 | ret = 0; |
| 1678 | } |
| 1679 | if (ret) |
Adrian Bunk | 672c3fd | 2005-06-25 14:59:18 -0700 | [diff] [blame^] | 1680 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | break; |
| 1682 | case (PH_PULL | CONFIRM): |
| 1683 | FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg); |
| 1684 | break; |
| 1685 | case (PH_PAUSE | INDICATION): |
| 1686 | test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag); |
| 1687 | break; |
| 1688 | case (PH_PAUSE | CONFIRM): |
| 1689 | test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag); |
| 1690 | break; |
| 1691 | case (PH_ACTIVATE | CONFIRM): |
| 1692 | case (PH_ACTIVATE | INDICATION): |
| 1693 | test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag); |
| 1694 | if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag)) |
| 1695 | FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg); |
| 1696 | break; |
| 1697 | case (PH_DEACTIVATE | INDICATION): |
| 1698 | case (PH_DEACTIVATE | CONFIRM): |
| 1699 | test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag); |
| 1700 | FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg); |
| 1701 | break; |
| 1702 | default: |
| 1703 | l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr); |
| 1704 | break; |
| 1705 | } |
| 1706 | } |
| 1707 | |
| 1708 | static void |
| 1709 | isdnl2_l3l2(struct PStack *st, int pr, void *arg) |
| 1710 | { |
| 1711 | switch (pr) { |
| 1712 | case (DL_DATA | REQUEST): |
| 1713 | if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) { |
| 1714 | dev_kfree_skb((struct sk_buff *) arg); |
| 1715 | } |
| 1716 | break; |
| 1717 | case (DL_UNIT_DATA | REQUEST): |
| 1718 | if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) { |
| 1719 | dev_kfree_skb((struct sk_buff *) arg); |
| 1720 | } |
| 1721 | break; |
| 1722 | case (DL_ESTABLISH | REQUEST): |
| 1723 | if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) { |
| 1724 | if (test_bit(FLG_LAPD, &st->l2.flag) || |
| 1725 | test_bit(FLG_ORIG, &st->l2.flag)) { |
| 1726 | FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg); |
| 1727 | } |
| 1728 | } else { |
| 1729 | if (test_bit(FLG_LAPD, &st->l2.flag) || |
| 1730 | test_bit(FLG_ORIG, &st->l2.flag)) { |
| 1731 | test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag); |
| 1732 | } |
| 1733 | st->l2.l2l1(st, PH_ACTIVATE, NULL); |
| 1734 | } |
| 1735 | break; |
| 1736 | case (DL_RELEASE | REQUEST): |
| 1737 | if (test_bit(FLG_LAPB, &st->l2.flag)) { |
| 1738 | st->l2.l2l1(st, PH_DEACTIVATE, NULL); |
| 1739 | } |
| 1740 | FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg); |
| 1741 | break; |
| 1742 | case (MDL_ASSIGN | REQUEST): |
| 1743 | FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg); |
| 1744 | break; |
| 1745 | case (MDL_REMOVE | REQUEST): |
| 1746 | FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg); |
| 1747 | break; |
| 1748 | case (MDL_ERROR | RESPONSE): |
| 1749 | FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg); |
| 1750 | break; |
| 1751 | } |
| 1752 | } |
| 1753 | |
| 1754 | void |
| 1755 | releasestack_isdnl2(struct PStack *st) |
| 1756 | { |
| 1757 | FsmDelTimer(&st->l2.t200, 21); |
| 1758 | FsmDelTimer(&st->l2.t203, 16); |
| 1759 | skb_queue_purge(&st->l2.i_queue); |
| 1760 | skb_queue_purge(&st->l2.ui_queue); |
| 1761 | ReleaseWin(&st->l2); |
| 1762 | } |
| 1763 | |
| 1764 | static void |
| 1765 | l2m_debug(struct FsmInst *fi, char *fmt, ...) |
| 1766 | { |
| 1767 | va_list args; |
| 1768 | struct PStack *st = fi->userdata; |
| 1769 | |
| 1770 | va_start(args, fmt); |
| 1771 | VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args); |
| 1772 | va_end(args); |
| 1773 | } |
| 1774 | |
| 1775 | void |
| 1776 | setstack_isdnl2(struct PStack *st, char *debug_id) |
| 1777 | { |
| 1778 | spin_lock_init(&st->l2.lock); |
| 1779 | st->l1.l1l2 = isdnl2_l1l2; |
| 1780 | st->l3.l3l2 = isdnl2_l3l2; |
| 1781 | |
| 1782 | skb_queue_head_init(&st->l2.i_queue); |
| 1783 | skb_queue_head_init(&st->l2.ui_queue); |
| 1784 | InitWin(&st->l2); |
| 1785 | st->l2.debug = 0; |
| 1786 | |
| 1787 | st->l2.l2m.fsm = &l2fsm; |
| 1788 | if (test_bit(FLG_LAPB, &st->l2.flag)) |
| 1789 | st->l2.l2m.state = ST_L2_4; |
| 1790 | else |
| 1791 | st->l2.l2m.state = ST_L2_1; |
| 1792 | st->l2.l2m.debug = 0; |
| 1793 | st->l2.l2m.userdata = st; |
| 1794 | st->l2.l2m.userint = 0; |
| 1795 | st->l2.l2m.printdebug = l2m_debug; |
| 1796 | strcpy(st->l2.debug_id, debug_id); |
| 1797 | |
| 1798 | FsmInitTimer(&st->l2.l2m, &st->l2.t200); |
| 1799 | FsmInitTimer(&st->l2.l2m, &st->l2.t203); |
| 1800 | } |
| 1801 | |
| 1802 | static void |
| 1803 | transl2_l3l2(struct PStack *st, int pr, void *arg) |
| 1804 | { |
| 1805 | switch (pr) { |
| 1806 | case (DL_DATA | REQUEST): |
| 1807 | case (DL_UNIT_DATA | REQUEST): |
| 1808 | st->l2.l2l1(st, PH_DATA | REQUEST, arg); |
| 1809 | break; |
| 1810 | case (DL_ESTABLISH | REQUEST): |
| 1811 | st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL); |
| 1812 | break; |
| 1813 | case (DL_RELEASE | REQUEST): |
| 1814 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); |
| 1815 | break; |
| 1816 | } |
| 1817 | } |
| 1818 | |
| 1819 | void |
| 1820 | setstack_transl2(struct PStack *st) |
| 1821 | { |
| 1822 | st->l3.l3l2 = transl2_l3l2; |
| 1823 | } |
| 1824 | |
| 1825 | void |
| 1826 | releasestack_transl2(struct PStack *st) |
| 1827 | { |
| 1828 | } |
| 1829 | |
| 1830 | int __init |
| 1831 | Isdnl2New(void) |
| 1832 | { |
| 1833 | l2fsm.state_count = L2_STATE_COUNT; |
| 1834 | l2fsm.event_count = L2_EVENT_COUNT; |
| 1835 | l2fsm.strEvent = strL2Event; |
| 1836 | l2fsm.strState = strL2State; |
| 1837 | return FsmNew(&l2fsm, L2FnList, L2_FN_COUNT); |
| 1838 | } |
| 1839 | |
| 1840 | void |
| 1841 | Isdnl2Free(void) |
| 1842 | { |
| 1843 | FsmFree(&l2fsm); |
| 1844 | } |