?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] ISDN: check for userspace copy faults
[linux-2.6/sactl.git] / drivers / isdn / isdnloop / isdnloop.c
blobc3ae2edaf6fa5812cf039ef00ef8e7b467aed901
1 /* $Id: isdnloop.c,v 1.11.6.7 2001/11/11 19:54:31 kai Exp $
2 *
3 * ISDN low-level module implementing a dummy loop driver.
4 *
5 * Copyright 1997 by Fritz Elfert (fritz@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 */
11
12 #include <linux/module.h>
13 #include <linux/interrupt.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include "isdnloop.h"
17
18 static char *revision = "$Revision: 1.11.6.7 $";
19 static char *isdnloop_id = "loop0";
20
21 MODULE_DESCRIPTION("ISDN4Linux: Pseudo Driver that simulates an ISDN card");
22 MODULE_AUTHOR("Fritz Elfert");
23 MODULE_LICENSE("GPL");
24 module_param(isdnloop_id, charp, 0);
25 MODULE_PARM_DESC(isdnloop_id, "ID-String of first card");
26
27 static int isdnloop_addcard(char *);
28
29 /*
30 * Free queue completely.
31 *
32 * Parameter:
33 * card = pointer to card struct
34 * channel = channel number
35 */
36 static void
37 isdnloop_free_queue(isdnloop_card * card, int channel)
38 {
39 struct sk_buff_head *queue = &card->bqueue[channel];
40
41 skb_queue_purge(queue);
42 card->sndcount[channel] = 0;
43 }
44
45 /*
46 * Send B-Channel data to another virtual card.
47 * This routine is called via timer-callback from isdnloop_pollbchan().
48 *
49 * Parameter:
50 * card = pointer to card struct.
51 * ch = channel number (0-based)
52 */
53 static void
54 isdnloop_bchan_send(isdnloop_card * card, int ch)
55 {
56 isdnloop_card *rcard = card->rcard[ch];
57 int rch = card->rch[ch], len, ack;
58 struct sk_buff *skb;
59 isdn_ctrl cmd;
60
61 while (card->sndcount[ch]) {
62 if ((skb = skb_dequeue(&card->bqueue[ch]))) {
63 len = skb->len;
64 card->sndcount[ch] -= len;
65 ack = *(skb->head); /* used as scratch area */
66 cmd.driver = card->myid;
67 cmd.arg = ch;
68 if (rcard){
69 rcard->interface.rcvcallb_skb(rcard->myid, rch, skb);
70 } else {
71 printk(KERN_WARNING "isdnloop: no rcard, skb dropped\n");
72 dev_kfree_skb(skb);
73
74 };
75 cmd.command = ISDN_STAT_BSENT;
76 cmd.parm.length = len;
77 card->interface.statcallb(&cmd);
78 } else
79 card->sndcount[ch] = 0;
80 }
81 }
82
83 /*
84 * Send/Receive Data to/from the B-Channel.
85 * This routine is called via timer-callback.
86 * It schedules itself while any B-Channel is open.
87 *
88 * Parameter:
89 * data = pointer to card struct, set by kernel timer.data
90 */
91 static void
92 isdnloop_pollbchan(unsigned long data)
93 {
94 isdnloop_card *card = (isdnloop_card *) data;
95 unsigned long flags;
96
97 if (card->flags & ISDNLOOP_FLAGS_B1ACTIVE)
98 isdnloop_bchan_send(card, 0);
99 if (card->flags & ISDNLOOP_FLAGS_B2ACTIVE)
100 isdnloop_bchan_send(card, 1);
101 if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE)) {
102 /* schedule b-channel polling again */
103 spin_lock_irqsave(&card->isdnloop_lock, flags);
104 card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
105 add_timer(&card->rb_timer);
106 card->flags |= ISDNLOOP_FLAGS_RBTIMER;
107 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
108 } else
109 card->flags &= ~ISDNLOOP_FLAGS_RBTIMER;
110 }
111
112 /*
113 * Parse ICN-type setup string and fill fields of setup-struct
114 * with parsed data.
115 *
116 * Parameter:
117 * setup = setup string, format: [caller-id],si1,si2,[called-id]
118 * cmd = pointer to struct to be filled.
119 */
120 static void
121 isdnloop_parse_setup(char *setup, isdn_ctrl * cmd)
122 {
123 char *t = setup;
124 char *s = strchr(t, ',');
125
126 *s++ = '\0';
127 strlcpy(cmd->parm.setup.phone, t, sizeof(cmd->parm.setup.phone));
128 s = strchr(t = s, ',');
129 *s++ = '\0';
130 if (!strlen(t))
131 cmd->parm.setup.si1 = 0;
132 else
133 cmd->parm.setup.si1 = simple_strtoul(t, NULL, 10);
134 s = strchr(t = s, ',');
135 *s++ = '\0';
136 if (!strlen(t))
137 cmd->parm.setup.si2 = 0;
138 else
139 cmd->parm.setup.si2 =
140 simple_strtoul(t, NULL, 10);
141 strlcpy(cmd->parm.setup.eazmsn, s, sizeof(cmd->parm.setup.eazmsn));
142 cmd->parm.setup.plan = 0;
143 cmd->parm.setup.screen = 0;
144 }
145
146 typedef struct isdnloop_stat {
147 char *statstr;
148 int command;
149 int action;
150 } isdnloop_stat;
151 /* *INDENT-OFF* */
152 static isdnloop_stat isdnloop_stat_table[] =
153 {
154 {"BCON_", ISDN_STAT_BCONN, 1}, /* B-Channel connected */
155 {"BDIS_", ISDN_STAT_BHUP, 2}, /* B-Channel disconnected */
156 {"DCON_", ISDN_STAT_DCONN, 0}, /* D-Channel connected */
157 {"DDIS_", ISDN_STAT_DHUP, 0}, /* D-Channel disconnected */
158 {"DCAL_I", ISDN_STAT_ICALL, 3}, /* Incoming call dialup-line */
159 {"DSCA_I", ISDN_STAT_ICALL, 3}, /* Incoming call 1TR6-SPV */
160 {"FCALL", ISDN_STAT_ICALL, 4}, /* Leased line connection up */
161 {"CIF", ISDN_STAT_CINF, 5}, /* Charge-info, 1TR6-type */
162 {"AOC", ISDN_STAT_CINF, 6}, /* Charge-info, DSS1-type */
163 {"CAU", ISDN_STAT_CAUSE, 7}, /* Cause code */
164 {"TEI OK", ISDN_STAT_RUN, 0}, /* Card connected to wallplug */
165 {"E_L1: ACT FAIL", ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
166 {"E_L2: DATA LIN", ISDN_STAT_BHUP, 8}, /* Layer-2 data link lost */
167 {"E_L1: ACTIVATION FAILED",
168 ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
169 {NULL, 0, -1}
170 };
171 /* *INDENT-ON* */
172
173
174 /*
175 * Parse Status message-strings from virtual card.
176 * Depending on status, call statcallb for sending messages to upper
177 * levels. Also set/reset B-Channel active-flags.
178 *
179 * Parameter:
180 * status = status string to parse.
181 * channel = channel where message comes from.
182 * card = card where message comes from.
183 */
184 static void
185 isdnloop_parse_status(u_char * status, int channel, isdnloop_card * card)
186 {
187 isdnloop_stat *s = isdnloop_stat_table;
188 int action = -1;
189 isdn_ctrl cmd;
190
191 while (s->statstr) {
192 if (!strncmp(status, s->statstr, strlen(s->statstr))) {
193 cmd.command = s->command;
194 action = s->action;
195 break;
196 }
197 s++;
198 }
199 if (action == -1)
200 return;
201 cmd.driver = card->myid;
202 cmd.arg = channel;
203 switch (action) {
204 case 1:
205 /* BCON_x */
206 card->flags |= (channel) ?
207 ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE;
208 break;
209 case 2:
210 /* BDIS_x */
211 card->flags &= ~((channel) ?
212 ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE);
213 isdnloop_free_queue(card, channel);
214 break;
215 case 3:
216 /* DCAL_I and DSCA_I */
217 isdnloop_parse_setup(status + 6, &cmd);
218 break;
219 case 4:
220 /* FCALL */
221 sprintf(cmd.parm.setup.phone, "LEASED%d", card->myid);
222 sprintf(cmd.parm.setup.eazmsn, "%d", channel + 1);
223 cmd.parm.setup.si1 = 7;
224 cmd.parm.setup.si2 = 0;
225 cmd.parm.setup.plan = 0;
226 cmd.parm.setup.screen = 0;
227 break;
228 case 5:
229 /* CIF */
230 strlcpy(cmd.parm.num, status + 3, sizeof(cmd.parm.num));
231 break;
232 case 6:
233 /* AOC */
234 snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%d",
235 (int) simple_strtoul(status + 7, NULL, 16));
236 break;
237 case 7:
238 /* CAU */
239 status += 3;
240 if (strlen(status) == 4)
241 snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%s%c%c",
242 status + 2, *status, *(status + 1));
243 else
244 strlcpy(cmd.parm.num, status + 1, sizeof(cmd.parm.num));
245 break;
246 case 8:
247 /* Misc Errors on L1 and L2 */
248 card->flags &= ~ISDNLOOP_FLAGS_B1ACTIVE;
249 isdnloop_free_queue(card, 0);
250 cmd.arg = 0;
251 cmd.driver = card->myid;
252 card->interface.statcallb(&cmd);
253 cmd.command = ISDN_STAT_DHUP;
254 cmd.arg = 0;
255 cmd.driver = card->myid;
256 card->interface.statcallb(&cmd);
257 cmd.command = ISDN_STAT_BHUP;
258 card->flags &= ~ISDNLOOP_FLAGS_B2ACTIVE;
259 isdnloop_free_queue(card, 1);
260 cmd.arg = 1;
261 cmd.driver = card->myid;
262 card->interface.statcallb(&cmd);
263 cmd.command = ISDN_STAT_DHUP;
264 cmd.arg = 1;
265 cmd.driver = card->myid;
266 break;
267 }
268 card->interface.statcallb(&cmd);
269 }
270
271 /*
272 * Store a cwcharacter into ringbuffer for reading from /dev/isdnctrl
273 *
274 * Parameter:
275 * card = pointer to card struct.
276 * c = char to store.
277 */
278 static void
279 isdnloop_putmsg(isdnloop_card * card, unsigned char c)
280 {
281 ulong flags;
282
283 spin_lock_irqsave(&card->isdnloop_lock, flags);
284 *card->msg_buf_write++ = (c == 0xff) ? '\n' : c;
285 if (card->msg_buf_write == card->msg_buf_read) {
286 if (++card->msg_buf_read > card->msg_buf_end)
287 card->msg_buf_read = card->msg_buf;
288 }
289 if (card->msg_buf_write > card->msg_buf_end)
290 card->msg_buf_write = card->msg_buf;
291 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
292 }
293
294 /*
295 * Poll a virtual cards message queue.
296 * If there are new status-replies from the card, copy them to
297 * ringbuffer for reading on /dev/isdnctrl and call
298 * isdnloop_parse_status() for processing them. Watch for special
299 * Firmware bootmessage and parse it, to get the D-Channel protocol.
300 * If there are B-Channels open, initiate a timer-callback to
301 * isdnloop_pollbchan().
302 * This routine is called periodically via timer interrupt.
303 *
304 * Parameter:
305 * data = pointer to card struct
306 */
307 static void
308 isdnloop_polldchan(unsigned long data)
309 {
310 isdnloop_card *card = (isdnloop_card *) data;
311 struct sk_buff *skb;
312 int avail;
313 int left;
314 u_char c;
315 int ch;
316 unsigned long flags;
317 u_char *p;
318 isdn_ctrl cmd;
319
320 if ((skb = skb_dequeue(&card->dqueue)))
321 avail = skb->len;
322 else
323 avail = 0;
324 for (left = avail; left > 0; left--) {
325 c = *skb->data;
326 skb_pull(skb, 1);
327 isdnloop_putmsg(card, c);
328 card->imsg[card->iptr] = c;
329 if (card->iptr < 59)
330 card->iptr++;
331 if (!skb->len) {
332 avail++;
333 isdnloop_putmsg(card, '\n');
334 card->imsg[card->iptr] = 0;
335 card->iptr = 0;
336 if (card->imsg[0] == '0' && card->imsg[1] >= '0' &&
337 card->imsg[1] <= '2' && card->imsg[2] == ';') {
338 ch = (card->imsg[1] - '0') - 1;
339 p = &card->imsg[3];
340 isdnloop_parse_status(p, ch, card);
341 } else {
342 p = card->imsg;
343 if (!strncmp(p, "DRV1.", 5)) {
344 printk(KERN_INFO "isdnloop: (%s) %s\n", CID, p);
345 if (!strncmp(p + 7, "TC", 2)) {
346 card->ptype = ISDN_PTYPE_1TR6;
347 card->interface.features |= ISDN_FEATURE_P_1TR6;
348 printk(KERN_INFO
349 "isdnloop: (%s) 1TR6-Protocol loaded and running\n", CID);
350 }
351 if (!strncmp(p + 7, "EC", 2)) {
352 card->ptype = ISDN_PTYPE_EURO;
353 card->interface.features |= ISDN_FEATURE_P_EURO;
354 printk(KERN_INFO
355 "isdnloop: (%s) Euro-Protocol loaded and running\n", CID);
356 }
357 continue;
358
359 }
360 }
361 }
362 }
363 if (avail) {
364 cmd.command = ISDN_STAT_STAVAIL;
365 cmd.driver = card->myid;
366 cmd.arg = avail;
367 card->interface.statcallb(&cmd);
368 }
369 if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE))
370 if (!(card->flags & ISDNLOOP_FLAGS_RBTIMER)) {
371 /* schedule b-channel polling */
372 card->flags |= ISDNLOOP_FLAGS_RBTIMER;
373 spin_lock_irqsave(&card->isdnloop_lock, flags);
374 del_timer(&card->rb_timer);
375 card->rb_timer.function = isdnloop_pollbchan;
376 card->rb_timer.data = (unsigned long) card;
377 card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
378 add_timer(&card->rb_timer);
379 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
380 }
381 /* schedule again */
382 spin_lock_irqsave(&card->isdnloop_lock, flags);
383 card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
384 add_timer(&card->st_timer);
385 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
386 }
387
388 /*
389 * Append a packet to the transmit buffer-queue.
390 *
391 * Parameter:
392 * channel = Number of B-channel
393 * skb = packet to send.
394 * card = pointer to card-struct
395 * Return:
396 * Number of bytes transferred, -E??? on error
397 */
398 static int
399 isdnloop_sendbuf(int channel, struct sk_buff *skb, isdnloop_card * card)
400 {
401 int len = skb->len;
402 unsigned long flags;
403 struct sk_buff *nskb;
404
405 if (len > 4000) {
406 printk(KERN_WARNING
407 "isdnloop: Send packet too large\n");
408 return -EINVAL;
409 }
410 if (len) {
411 if (!(card->flags & (channel) ? ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE))
412 return 0;
413 if (card->sndcount[channel] > ISDNLOOP_MAX_SQUEUE)
414 return 0;
415 spin_lock_irqsave(&card->isdnloop_lock, flags);
416 nskb = dev_alloc_skb(skb->len);
417 if (nskb) {
418 memcpy(skb_put(nskb, len), skb->data, len);
419 skb_queue_tail(&card->bqueue[channel], nskb);
420 dev_kfree_skb(skb);
421 } else
422 len = 0;
423 card->sndcount[channel] += len;
424 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
425 }
426 return len;
427 }
428
429 /*
430 * Read the messages from the card's ringbuffer
431 *
432 * Parameter:
433 * buf = pointer to buffer.
434 * len = number of bytes to read.
435 * user = flag, 1: called from userlevel 0: called from kernel.
436 * card = pointer to card struct.
437 * Return:
438 * number of bytes actually transferred.
439 */
440 static int
441 isdnloop_readstatus(u_char __user *buf, int len, isdnloop_card * card)
442 {
443 int count;
444 u_char __user *p;
445
446 for (p = buf, count = 0; count < len; p++, count++) {
447 if (card->msg_buf_read == card->msg_buf_write)
448 return count;
449 if (put_user(*card->msg_buf_read++, p))
450 return -EFAULT;
451 if (card->msg_buf_read > card->msg_buf_end)
452 card->msg_buf_read = card->msg_buf;
453 }
454 return count;
455 }
456
457 /*
458 * Simulate a card's response by appending it to the cards
459 * message queue.
460 *
461 * Parameter:
462 * card = pointer to card struct.
463 * s = pointer to message-string.
464 * ch = channel: 0 = generic messages, 1 and 2 = D-channel messages.
465 * Return:
466 * 0 on success, 1 on memory squeeze.
467 */
468 static int
469 isdnloop_fake(isdnloop_card * card, char *s, int ch)
470 {
471 struct sk_buff *skb;
472 int len = strlen(s) + ((ch >= 0) ? 3 : 0);
473
474 if (!(skb = dev_alloc_skb(len))) {
475 printk(KERN_WARNING "isdnloop: Out of memory in isdnloop_fake\n");
476 return 1;
477 }
478 if (ch >= 0)
479 sprintf(skb_put(skb, 3), "%02d;", ch);
480 memcpy(skb_put(skb, strlen(s)), s, strlen(s));
481 skb_queue_tail(&card->dqueue, skb);
482 return 0;
483 }
484 /* *INDENT-OFF* */
485 static isdnloop_stat isdnloop_cmd_table[] =
486 {
487 {"BCON_R", 0, 1}, /* B-Channel connect */
488 {"BCON_I", 0, 17}, /* B-Channel connect ind */
489 {"BDIS_R", 0, 2}, /* B-Channel disconnect */
490 {"DDIS_R", 0, 3}, /* D-Channel disconnect */
491 {"DCON_R", 0, 16}, /* D-Channel connect */
492 {"DSCA_R", 0, 4}, /* Dial 1TR6-SPV */
493 {"DCAL_R", 0, 5}, /* Dial */
494 {"EAZC", 0, 6}, /* Clear EAZ listener */
495 {"EAZ", 0, 7}, /* Set EAZ listener */
496 {"SEEAZ", 0, 8}, /* Get EAZ listener */
497 {"MSN", 0, 9}, /* Set/Clear MSN listener */
498 {"MSALL", 0, 10}, /* Set multi MSN listeners */
499 {"SETSIL", 0, 11}, /* Set SI list */
500 {"SEESIL", 0, 12}, /* Get SI list */
501 {"SILC", 0, 13}, /* Clear SI list */
502 {"LOCK", 0, -1}, /* LOCK channel */
503 {"UNLOCK", 0, -1}, /* UNLOCK channel */
504 {"FV2ON", 1, 14}, /* Leased mode on */
505 {"FV2OFF", 1, 15}, /* Leased mode off */
506 {NULL, 0, -1}
507 };
508 /* *INDENT-ON* */
509
510
511 /*
512 * Simulate an error-response from a card.
513 *
514 * Parameter:
515 * card = pointer to card struct.
516 */
517 static void
518 isdnloop_fake_err(isdnloop_card * card)
519 {
520 char buf[60];
521
522 sprintf(buf, "E%s", card->omsg);
523 isdnloop_fake(card, buf, -1);
524 isdnloop_fake(card, "NAK", -1);
525 }
526
527 static u_char ctable_eu[] =
528 {0x00, 0x11, 0x01, 0x12};
529 static u_char ctable_1t[] =
530 {0x00, 0x3b, 0x01, 0x3a};
531
532 /*
533 * Assemble a simplified cause message depending on the
534 * D-channel protocol used.
535 *
536 * Parameter:
537 * card = pointer to card struct.
538 * loc = location: 0 = local, 1 = remote.
539 * cau = cause: 1 = busy, 2 = nonexistent callerid, 3 = no user responding.
540 * Return:
541 * Pointer to buffer containing the assembled message.
542 */
543 static char *
544 isdnloop_unicause(isdnloop_card * card, int loc, int cau)
545 {
546 static char buf[6];
547
548 switch (card->ptype) {
549 case ISDN_PTYPE_EURO:
550 sprintf(buf, "E%02X%02X", (loc) ? 4 : 2, ctable_eu[cau]);
551 break;
552 case ISDN_PTYPE_1TR6:
553 sprintf(buf, "%02X44", ctable_1t[cau]);
554 break;
555 default:
556 return ("0000");
557 }
558 return (buf);
559 }
560
561 /*
562 * Release a virtual connection. Called from timer interrupt, when
563 * called party did not respond.
564 *
565 * Parameter:
566 * card = pointer to card struct.
567 * ch = channel (0-based)
568 */
569 static void
570 isdnloop_atimeout(isdnloop_card * card, int ch)
571 {
572 unsigned long flags;
573 char buf[60];
574
575 spin_lock_irqsave(&card->isdnloop_lock, flags);
576 if (card->rcard) {
577 isdnloop_fake(card->rcard[ch], "DDIS_I", card->rch[ch] + 1);
578 card->rcard[ch]->rcard[card->rch[ch]] = NULL;
579 card->rcard[ch] = NULL;
580 }
581 isdnloop_fake(card, "DDIS_I", ch + 1);
582 /* No user responding */
583 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 3));
584 isdnloop_fake(card, buf, ch + 1);
585 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
586 }
587
588 /*
589 * Wrapper for isdnloop_atimeout().
590 */
591 static void
592 isdnloop_atimeout0(unsigned long data)
593 {
594 isdnloop_card *card = (isdnloop_card *) data;
595 isdnloop_atimeout(card, 0);
596 }
597
598 /*
599 * Wrapper for isdnloop_atimeout().
600 */
601 static void
602 isdnloop_atimeout1(unsigned long data)
603 {
604 isdnloop_card *card = (isdnloop_card *) data;
605 isdnloop_atimeout(card, 1);
606 }
607
608 /*
609 * Install a watchdog for a user, not responding.
610 *
611 * Parameter:
612 * card = pointer to card struct.
613 * ch = channel to watch for.
614 */
615 static void
616 isdnloop_start_ctimer(isdnloop_card * card, int ch)
617 {
618 unsigned long flags;
619
620 spin_lock_irqsave(&card->isdnloop_lock, flags);
621 init_timer(&card->c_timer[ch]);
622 card->c_timer[ch].expires = jiffies + ISDNLOOP_TIMER_ALERTWAIT;
623 if (ch)
624 card->c_timer[ch].function = isdnloop_atimeout1;
625 else
626 card->c_timer[ch].function = isdnloop_atimeout0;
627 card->c_timer[ch].data = (unsigned long) card;
628 add_timer(&card->c_timer[ch]);
629 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
630 }
631
632 /*
633 * Kill a pending channel watchdog.
634 *
635 * Parameter:
636 * card = pointer to card struct.
637 * ch = channel (0-based).
638 */
639 static void
640 isdnloop_kill_ctimer(isdnloop_card * card, int ch)
641 {
642 unsigned long flags;
643
644 spin_lock_irqsave(&card->isdnloop_lock, flags);
645 del_timer(&card->c_timer[ch]);
646 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
647 }
648
649 static u_char si2bit[] =
650 {0, 1, 0, 0, 0, 2, 0, 4, 0, 0};
651 static u_char bit2si[] =
652 {1, 5, 7};
653
654 /*
655 * Try finding a listener for an outgoing call.
656 *
657 * Parameter:
658 * card = pointer to calling card.
659 * p = pointer to ICN-type setup-string.
660 * lch = channel of calling card.
661 * cmd = pointer to struct to be filled when parsing setup.
662 * Return:
663 * 0 = found match, alerting should happen.
664 * 1 = found matching number but it is busy.
665 * 2 = no matching listener.
666 * 3 = found matching number but SI does not match.
667 */
668 static int
669 isdnloop_try_call(isdnloop_card * card, char *p, int lch, isdn_ctrl * cmd)
670 {
671 isdnloop_card *cc = cards;
672 unsigned long flags;
673 int ch;
674 int num_match;
675 int i;
676 char *e;
677 char nbuf[32];
678
679 isdnloop_parse_setup(p, cmd);
680 while (cc) {
681 for (ch = 0; ch < 2; ch++) {
682 /* Exclude ourself */
683 if ((cc == card) && (ch == lch))
684 continue;
685 num_match = 0;
686 switch (cc->ptype) {
687 case ISDN_PTYPE_EURO:
688 for (i = 0; i < 3; i++)
689 if (!(strcmp(cc->s0num[i], cmd->parm.setup.phone)))
690 num_match = 1;
691 break;
692 case ISDN_PTYPE_1TR6:
693 e = cc->eazlist[ch];
694 while (*e) {
695 sprintf(nbuf, "%s%c", cc->s0num[0], *e);
696 if (!(strcmp(nbuf, cmd->parm.setup.phone)))
697 num_match = 1;
698 e++;
699 }
700 }
701 if (num_match) {
702 spin_lock_irqsave(&card->isdnloop_lock, flags);
703 /* channel idle? */
704 if (!(cc->rcard[ch])) {
705 /* Check SI */
706 if (!(si2bit[cmd->parm.setup.si1] & cc->sil[ch])) {
707 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
708 return 3;
709 }
710 /* ch is idle, si and number matches */
711 cc->rcard[ch] = card;
712 cc->rch[ch] = lch;
713 card->rcard[lch] = cc;
714 card->rch[lch] = ch;
715 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
716 return 0;
717 } else {
718 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
719 /* num matches, but busy */
720 if (ch == 1)
721 return 1;
722 }
723 }
724 }
725 cc = cc->next;
726 }
727 return 2;
728 }
729
730 /*
731 * Depending on D-channel protocol and caller/called, modify
732 * phone number.
733 *
734 * Parameter:
735 * card = pointer to card struct.
736 * phone = pointer phone number.
737 * caller = flag: 1 = caller, 0 = called.
738 * Return:
739 * pointer to new phone number.
740 */
741 static char *
742 isdnloop_vstphone(isdnloop_card * card, char *phone, int caller)
743 {
744 int i;
745 static char nphone[30];
746
747 if (!card) {
748 printk("BUG!!!\n");
749 return "";
750 }
751 switch (card->ptype) {
752 case ISDN_PTYPE_EURO:
753 if (caller) {
754 for (i = 0; i < 2; i++)
755 if (!(strcmp(card->s0num[i], phone)))
756 return (phone);
757 return (card->s0num[0]);
758 }
759 return (phone);
760 break;
761 case ISDN_PTYPE_1TR6:
762 if (caller) {
763 sprintf(nphone, "%s%c", card->s0num[0], phone[0]);
764 return (nphone);
765 } else
766 return (&phone[strlen(phone) - 1]);
767 break;
768 }
769 return "";
770 }
771
772 /*
773 * Parse an ICN-type command string sent to the 'card'.
774 * Perform misc. actions depending on the command.
775 *
776 * Parameter:
777 * card = pointer to card struct.
778 */
779 static void
780 isdnloop_parse_cmd(isdnloop_card * card)
781 {
782 char *p = card->omsg;
783 isdn_ctrl cmd;
784 char buf[60];
785 isdnloop_stat *s = isdnloop_cmd_table;
786 int action = -1;
787 int i;
788 int ch;
789
790 if ((card->omsg[0] != '0') && (card->omsg[2] != ';')) {
791 isdnloop_fake_err(card);
792 return;
793 }
794 ch = card->omsg[1] - '0';
795 if ((ch < 0) || (ch > 2)) {
796 isdnloop_fake_err(card);
797 return;
798 }
799 p += 3;
800 while (s->statstr) {
801 if (!strncmp(p, s->statstr, strlen(s->statstr))) {
802 action = s->action;
803 if (s->command && (ch != 0)) {
804 isdnloop_fake_err(card);
805 return;
806 }
807 break;
808 }
809 s++;
810 }
811 if (action == -1)
812 return;
813 switch (action) {
814 case 1:
815 /* 0x;BCON_R */
816 if (card->rcard[ch - 1]) {
817 isdnloop_fake(card->rcard[ch - 1], "BCON_I",
818 card->rch[ch - 1] + 1);
819 isdnloop_fake(card, "BCON_C", ch);
820 }
821 break;
822 case 17:
823 /* 0x;BCON_I */
824 if (card->rcard[ch - 1]) {
825 isdnloop_fake(card->rcard[ch - 1], "BCON_C",
826 card->rch[ch - 1] + 1);
827 }
828 break;
829 case 2:
830 /* 0x;BDIS_R */
831 isdnloop_fake(card, "BDIS_C", ch);
832 if (card->rcard[ch - 1]) {
833 isdnloop_fake(card->rcard[ch - 1], "BDIS_I",
834 card->rch[ch - 1] + 1);
835 }
836 break;
837 case 16:
838 /* 0x;DCON_R */
839 isdnloop_kill_ctimer(card, ch - 1);
840 if (card->rcard[ch - 1]) {
841 isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
842 isdnloop_fake(card->rcard[ch - 1], "DCON_C",
843 card->rch[ch - 1] + 1);
844 isdnloop_fake(card, "DCON_C", ch);
845 }
846 break;
847 case 3:
848 /* 0x;DDIS_R */
849 isdnloop_kill_ctimer(card, ch - 1);
850 if (card->rcard[ch - 1]) {
851 isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
852 isdnloop_fake(card->rcard[ch - 1], "DDIS_I",
853 card->rch[ch - 1] + 1);
854 card->rcard[ch - 1] = NULL;
855 }
856 isdnloop_fake(card, "DDIS_C", ch);
857 break;
858 case 4:
859 /* 0x;DSCA_Rdd,yy,zz,oo */
860 if (card->ptype != ISDN_PTYPE_1TR6) {
861 isdnloop_fake_err(card);
862 return;
863 }
864 /* Fall through */
865 case 5:
866 /* 0x;DCAL_Rdd,yy,zz,oo */
867 p += 6;
868 switch (isdnloop_try_call(card, p, ch - 1, &cmd)) {
869 case 0:
870 /* Alerting */
871 sprintf(buf, "D%s_I%s,%02d,%02d,%s",
872 (action == 4) ? "SCA" : "CAL",
873 isdnloop_vstphone(card, cmd.parm.setup.eazmsn, 1),
874 cmd.parm.setup.si1,
875 cmd.parm.setup.si2,
876 isdnloop_vstphone(card->rcard[ch - 1],
877 cmd.parm.setup.phone, 0));
878 isdnloop_fake(card->rcard[ch - 1], buf, card->rch[ch - 1] + 1);
879 /* Fall through */
880 case 3:
881 /* si1 does not match, don't alert but start timer */
882 isdnloop_start_ctimer(card, ch - 1);
883 break;
884 case 1:
885 /* Remote busy */
886 isdnloop_fake(card, "DDIS_I", ch);
887 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 1));
888 isdnloop_fake(card, buf, ch);
889 break;
890 case 2:
891 /* No such user */
892 isdnloop_fake(card, "DDIS_I", ch);
893 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 2));
894 isdnloop_fake(card, buf, ch);
895 break;
896 }
897 break;
898 case 6:
899 /* 0x;EAZC */
900 card->eazlist[ch - 1][0] = '\0';
901 break;
902 case 7:
903 /* 0x;EAZ */
904 p += 3;
905 strcpy(card->eazlist[ch - 1], p);
906 break;
907 case 8:
908 /* 0x;SEEAZ */
909 sprintf(buf, "EAZ-LIST: %s", card->eazlist[ch - 1]);
910 isdnloop_fake(card, buf, ch + 1);
911 break;
912 case 9:
913 /* 0x;MSN */
914 break;
915 case 10:
916 /* 0x;MSNALL */
917 break;
918 case 11:
919 /* 0x;SETSIL */
920 p += 6;
921 i = 0;
922 while (strchr("0157", *p)) {
923 if (i)
924 card->sil[ch - 1] |= si2bit[*p - '0'];
925 i = (*p++ == '0');
926 }
927 if (*p)
928 isdnloop_fake_err(card);
929 break;
930 case 12:
931 /* 0x;SEESIL */
932 sprintf(buf, "SIN-LIST: ");
933 p = buf + 10;
934 for (i = 0; i < 3; i++)
935 if (card->sil[ch - 1] & (1 << i))
936 p += sprintf(p, "%02d", bit2si[i]);
937 isdnloop_fake(card, buf, ch + 1);
938 break;
939 case 13:
940 /* 0x;SILC */
941 card->sil[ch - 1] = 0;
942 break;
943 case 14:
944 /* 00;FV2ON */
945 break;
946 case 15:
947 /* 00;FV2OFF */
948 break;
949 }
950 }
951
952 /*
953 * Put command-strings into the of the 'card'. In reality, execute them
954 * right in place by calling isdnloop_parse_cmd(). Also copy every
955 * command to the read message ringbuffer, preceeding it with a '>'.
956 * These mesagges can be read at /dev/isdnctrl.
957 *
958 * Parameter:
959 * buf = pointer to command buffer.
960 * len = length of buffer data.
961 * user = flag: 1 = called form userlevel, 0 called from kernel.
962 * card = pointer to card struct.
963 * Return:
964 * number of bytes transferred (currently always equals len).
965 */
966 static int
967 isdnloop_writecmd(const u_char * buf, int len, int user, isdnloop_card * card)
968 {
969 int xcount = 0;
970 int ocount = 1;
971 isdn_ctrl cmd;
972
973 while (len) {
974 int count = len;
975 u_char *p;
976 u_char msg[0x100];
977
978 if (count > 255)
979 count = 255;
980 if (user) {
981 if (copy_from_user(msg, buf, count))
982 return -EFAULT;
983 } else
984 memcpy(msg, buf, count);
985 isdnloop_putmsg(card, '>');
986 for (p = msg; count > 0; count--, p++) {
987 len--;
988 xcount++;
989 isdnloop_putmsg(card, *p);
990 card->omsg[card->optr] = *p;
991 if (*p == '\n') {
992 card->omsg[card->optr] = '\0';
993 card->optr = 0;
994 isdnloop_parse_cmd(card);
995 if (len) {
996 isdnloop_putmsg(card, '>');
997 ocount++;
998 }
999 } else {
1000 if (card->optr < 59)
1001 card->optr++;
1002 }
1003 ocount++;
1004 }
1005 }
1006 cmd.command = ISDN_STAT_STAVAIL;
1007 cmd.driver = card->myid;
1008 cmd.arg = ocount;
1009 card->interface.statcallb(&cmd);
1010 return xcount;
1011 }
1012
1013 /*
1014 * Delete card's pending timers, send STOP to linklevel
1015 */
1016 static void
1017 isdnloop_stopcard(isdnloop_card * card)
1018 {
1019 unsigned long flags;
1020 isdn_ctrl cmd;
1021
1022 spin_lock_irqsave(&card->isdnloop_lock, flags);
1023 if (card->flags & ISDNLOOP_FLAGS_RUNNING) {
1024 card->flags &= ~ISDNLOOP_FLAGS_RUNNING;
1025 del_timer(&card->st_timer);
1026 del_timer(&card->rb_timer);
1027 del_timer(&card->c_timer[0]);
1028 del_timer(&card->c_timer[1]);
1029 cmd.command = ISDN_STAT_STOP;
1030 cmd.driver = card->myid;
1031 card->interface.statcallb(&cmd);
1032 }
1033 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1034 }
1035
1036 /*
1037 * Stop all cards before unload.
1038 */
1039 static void
1040 isdnloop_stopallcards(void)
1041 {
1042 isdnloop_card *p = cards;
1043
1044 while (p) {
1045 isdnloop_stopcard(p);
1046 p = p->next;
1047 }
1048 }
1049
1050 /*
1051 * Start a 'card'. Simulate card's boot message and set the phone
1052 * number(s) of the virtual 'S0-Interface'. Install D-channel
1053 * poll timer.
1054 *
1055 * Parameter:
1056 * card = pointer to card struct.
1057 * sdefp = pointer to struct holding ioctl parameters.
1058 * Return:
1059 * 0 on success, -E??? otherwise.
1060 */
1061 static int
1062 isdnloop_start(isdnloop_card * card, isdnloop_sdef * sdefp)
1063 {
1064 unsigned long flags;
1065 isdnloop_sdef sdef;
1066 int i;
1067
1068 if (card->flags & ISDNLOOP_FLAGS_RUNNING)
1069 return -EBUSY;
1070 if (copy_from_user((char *) &sdef, (char *) sdefp, sizeof(sdef)))
1071 return -EFAULT;
1072 spin_lock_irqsave(&card->isdnloop_lock, flags);
1073 switch (sdef.ptype) {
1074 case ISDN_PTYPE_EURO:
1075 if (isdnloop_fake(card, "DRV1.23EC-Q.931-CAPI-CNS-BASIS-20.02.96",
1076 -1)) {
1077 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1078 return -ENOMEM;
1079 }
1080 card->sil[0] = card->sil[1] = 4;
1081 if (isdnloop_fake(card, "TEI OK", 0)) {
1082 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1083 return -ENOMEM;
1084 }
1085 for (i = 0; i < 3; i++)
1086 strcpy(card->s0num[i], sdef.num[i]);
1087 break;
1088 case ISDN_PTYPE_1TR6:
1089 if (isdnloop_fake(card, "DRV1.04TC-1TR6-CAPI-CNS-BASIS-29.11.95",
1090 -1)) {
1091 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1092 return -ENOMEM;
1093 }
1094 card->sil[0] = card->sil[1] = 4;
1095 if (isdnloop_fake(card, "TEI OK", 0)) {
1096 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1097 return -ENOMEM;
1098 }
1099 strcpy(card->s0num[0], sdef.num[0]);
1100 card->s0num[1][0] = '\0';
1101 card->s0num[2][0] = '\0';
1102 break;
1103 default:
1104 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1105 printk(KERN_WARNING "isdnloop: Illegal D-channel protocol %d\n",
1106 sdef.ptype);
1107 return -EINVAL;
1108 }
1109 init_timer(&card->st_timer);
1110 card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
1111 card->st_timer.function = isdnloop_polldchan;
1112 card->st_timer.data = (unsigned long) card;
1113 add_timer(&card->st_timer);
1114 card->flags |= ISDNLOOP_FLAGS_RUNNING;
1115 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1116 return 0;
1117 }
1118
1119 /*
1120 * Main handler for commands sent by linklevel.
1121 */
1122 static int
1123 isdnloop_command(isdn_ctrl * c, isdnloop_card * card)
1124 {
1125 ulong a;
1126 int i;
1127 char cbuf[60];
1128 isdn_ctrl cmd;
1129 isdnloop_cdef cdef;
1130
1131 switch (c->command) {
1132 case ISDN_CMD_IOCTL:
1133 memcpy(&a, c->parm.num, sizeof(ulong));
1134 switch (c->arg) {
1135 case ISDNLOOP_IOCTL_DEBUGVAR:
1136 return (ulong) card;
1137 case ISDNLOOP_IOCTL_STARTUP:
1138 if (!access_ok(VERIFY_READ, (void *) a, sizeof(isdnloop_sdef)))
1139 return -EFAULT;
1140 return (isdnloop_start(card, (isdnloop_sdef *) a));
1141 break;
1142 case ISDNLOOP_IOCTL_ADDCARD:
1143 if (copy_from_user((char *)&cdef,
1144 (char *)a,
1145 sizeof(cdef)))
1146 return -EFAULT;
1147 return (isdnloop_addcard(cdef.id1));
1148 break;
1149 case ISDNLOOP_IOCTL_LEASEDCFG:
1150 if (a) {
1151 if (!card->leased) {
1152 card->leased = 1;
1153 while (card->ptype == ISDN_PTYPE_UNKNOWN)
1154 schedule_timeout_interruptible(10);
1155 schedule_timeout_interruptible(10);
1156 sprintf(cbuf, "00;FV2ON\n01;EAZ1\n02;EAZ2\n");
1157 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1158 printk(KERN_INFO
1159 "isdnloop: (%s) Leased-line mode enabled\n",
1160 CID);
1161 cmd.command = ISDN_STAT_RUN;
1162 cmd.driver = card->myid;
1163 cmd.arg = 0;
1164 card->interface.statcallb(&cmd);
1165 }
1166 } else {
1167 if (card->leased) {
1168 card->leased = 0;
1169 sprintf(cbuf, "00;FV2OFF\n");
1170 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1171 printk(KERN_INFO
1172 "isdnloop: (%s) Leased-line mode disabled\n",
1173 CID);
1174 cmd.command = ISDN_STAT_RUN;
1175 cmd.driver = card->myid;
1176 cmd.arg = 0;
1177 card->interface.statcallb(&cmd);
1178 }
1179 }
1180 return 0;
1181 default:
1182 return -EINVAL;
1183 }
1184 break;
1185 case ISDN_CMD_DIAL:
1186 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1187 return -ENODEV;
1188 if (card->leased)
1189 break;
1190 if ((c->arg & 255) < ISDNLOOP_BCH) {
1191 char *p;
1192 char dial[50];
1193 char dcode[4];
1194
1195 a = c->arg;
1196 p = c->parm.setup.phone;
1197 if (*p == 's' || *p == 'S') {
1198 /* Dial for SPV */
1199 p++;
1200 strcpy(dcode, "SCA");
1201 } else
1202 /* Normal Dial */
1203 strcpy(dcode, "CAL");
1204 strcpy(dial, p);
1205 sprintf(cbuf, "%02d;D%s_R%s,%02d,%02d,%s\n", (int) (a + 1),
1206 dcode, dial, c->parm.setup.si1,
1207 c->parm.setup.si2, c->parm.setup.eazmsn);
1208 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1209 }
1210 break;
1211 case ISDN_CMD_ACCEPTD:
1212 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1213 return -ENODEV;
1214 if (c->arg < ISDNLOOP_BCH) {
1215 a = c->arg + 1;
1216 cbuf[0] = 0;
1217 switch (card->l2_proto[a - 1]) {
1218 case ISDN_PROTO_L2_X75I:
1219 sprintf(cbuf, "%02d;BX75\n", (int) a);
1220 break;
1221 #ifdef CONFIG_ISDN_X25
1222 case ISDN_PROTO_L2_X25DTE:
1223 sprintf(cbuf, "%02d;BX2T\n", (int) a);
1224 break;
1225 case ISDN_PROTO_L2_X25DCE:
1226 sprintf(cbuf, "%02d;BX2C\n", (int) a);
1227 break;
1228 #endif
1229 case ISDN_PROTO_L2_HDLC:
1230 sprintf(cbuf, "%02d;BTRA\n", (int) a);
1231 break;
1232 }
1233 if (strlen(cbuf))
1234 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1235 sprintf(cbuf, "%02d;DCON_R\n", (int) a);
1236 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1237 }
1238 break;
1239 case ISDN_CMD_ACCEPTB:
1240 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1241 return -ENODEV;
1242 if (c->arg < ISDNLOOP_BCH) {
1243 a = c->arg + 1;
1244 switch (card->l2_proto[a - 1]) {
1245 case ISDN_PROTO_L2_X75I:
1246 sprintf(cbuf, "%02d;BCON_R,BX75\n", (int) a);
1247 break;
1248 #ifdef CONFIG_ISDN_X25
1249 case ISDN_PROTO_L2_X25DTE:
1250 sprintf(cbuf, "%02d;BCON_R,BX2T\n", (int) a);
1251 break;
1252 case ISDN_PROTO_L2_X25DCE:
1253 sprintf(cbuf, "%02d;BCON_R,BX2C\n", (int) a);
1254 break;
1255 #endif
1256 case ISDN_PROTO_L2_HDLC:
1257 sprintf(cbuf, "%02d;BCON_R,BTRA\n", (int) a);
1258 break;
1259 default:
1260 sprintf(cbuf, "%02d;BCON_R\n", (int) a);
1261 }
1262 printk(KERN_DEBUG "isdnloop writecmd '%s'\n", cbuf);
1263 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1264 break;
1265 case ISDN_CMD_HANGUP:
1266 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1267 return -ENODEV;
1268 if (c->arg < ISDNLOOP_BCH) {
1269 a = c->arg + 1;
1270 sprintf(cbuf, "%02d;BDIS_R\n%02d;DDIS_R\n", (int) a, (int) a);
1271 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1272 }
1273 break;
1274 case ISDN_CMD_SETEAZ:
1275 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1276 return -ENODEV;
1277 if (card->leased)
1278 break;
1279 if (c->arg < ISDNLOOP_BCH) {
1280 a = c->arg + 1;
1281 if (card->ptype == ISDN_PTYPE_EURO) {
1282 sprintf(cbuf, "%02d;MS%s%s\n", (int) a,
1283 c->parm.num[0] ? "N" : "ALL", c->parm.num);
1284 } else
1285 sprintf(cbuf, "%02d;EAZ%s\n", (int) a,
1286 c->parm.num[0] ? c->parm.num : (u_char *) "0123456789");
1287 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1288 }
1289 break;
1290 case ISDN_CMD_CLREAZ:
1291 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1292 return -ENODEV;
1293 if (card->leased)
1294 break;
1295 if (c->arg < ISDNLOOP_BCH) {
1296 a = c->arg + 1;
1297 if (card->ptype == ISDN_PTYPE_EURO)
1298 sprintf(cbuf, "%02d;MSNC\n", (int) a);
1299 else
1300 sprintf(cbuf, "%02d;EAZC\n", (int) a);
1301 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1302 }
1303 break;
1304 case ISDN_CMD_SETL2:
1305 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1306 return -ENODEV;
1307 if ((c->arg & 255) < ISDNLOOP_BCH) {
1308 a = c->arg;
1309 switch (a >> 8) {
1310 case ISDN_PROTO_L2_X75I:
1311 sprintf(cbuf, "%02d;BX75\n", (int) (a & 255) + 1);
1312 break;
1313 #ifdef CONFIG_ISDN_X25
1314 case ISDN_PROTO_L2_X25DTE:
1315 sprintf(cbuf, "%02d;BX2T\n", (int) (a & 255) + 1);
1316 break;
1317 case ISDN_PROTO_L2_X25DCE:
1318 sprintf(cbuf, "%02d;BX2C\n", (int) (a & 255) + 1);
1319 break;
1320 #endif
1321 case ISDN_PROTO_L2_HDLC:
1322 sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
1323 break;
1324 case ISDN_PROTO_L2_TRANS:
1325 sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
1326 break;
1327 default:
1328 return -EINVAL;
1329 }
1330 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1331 card->l2_proto[a & 255] = (a >> 8);
1332 }
1333 break;
1334 case ISDN_CMD_SETL3:
1335 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1336 return -ENODEV;
1337 return 0;
1338 default:
1339 return -EINVAL;
1340 }
1341 }
1342 return 0;
1343 }
1344
1345 /*
1346 * Find card with given driverId
1347 */
1348 static inline isdnloop_card *
1349 isdnloop_findcard(int driverid)
1350 {
1351 isdnloop_card *p = cards;
1352
1353 while (p) {
1354 if (p->myid == driverid)
1355 return p;
1356 p = p->next;
1357 }
1358 return (isdnloop_card *) 0;
1359 }
1360
1361 /*
1362 * Wrapper functions for interface to linklevel
1363 */
1364 static int
1365 if_command(isdn_ctrl * c)
1366 {
1367 isdnloop_card *card = isdnloop_findcard(c->driver);
1368
1369 if (card)
1370 return (isdnloop_command(c, card));
1371 printk(KERN_ERR
1372 "isdnloop: if_command called with invalid driverId!\n");
1373 return -ENODEV;
1374 }
1375
1376 static int
1377 if_writecmd(const u_char __user *buf, int len, int id, int channel)
1378 {
1379 isdnloop_card *card = isdnloop_findcard(id);
1380
1381 if (card) {
1382 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1383 return -ENODEV;
1384 return (isdnloop_writecmd(buf, len, 1, card));
1385 }
1386 printk(KERN_ERR
1387 "isdnloop: if_writecmd called with invalid driverId!\n");
1388 return -ENODEV;
1389 }
1390
1391 static int
1392 if_readstatus(u_char __user *buf, int len, int id, int channel)
1393 {
1394 isdnloop_card *card = isdnloop_findcard(id);
1395
1396 if (card) {
1397 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1398 return -ENODEV;
1399 return (isdnloop_readstatus(buf, len, card));
1400 }
1401 printk(KERN_ERR
1402 "isdnloop: if_readstatus called with invalid driverId!\n");
1403 return -ENODEV;
1404 }
1405
1406 static int
1407 if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
1408 {
1409 isdnloop_card *card = isdnloop_findcard(id);
1410
1411 if (card) {
1412 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1413 return -ENODEV;
1414 /* ack request stored in skb scratch area */
1415 *(skb->head) = ack;
1416 return (isdnloop_sendbuf(channel, skb, card));
1417 }
1418 printk(KERN_ERR
1419 "isdnloop: if_sendbuf called with invalid driverId!\n");
1420 return -ENODEV;
1421 }
1422
1423 /*
1424 * Allocate a new card-struct, initialize it
1425 * link it into cards-list and register it at linklevel.
1426 */
1427 static isdnloop_card *
1428 isdnloop_initcard(char *id)
1429 {
1430 isdnloop_card *card;
1431 int i;
1432
1433 if (!(card = (isdnloop_card *) kmalloc(sizeof(isdnloop_card), GFP_KERNEL))) {
1434 printk(KERN_WARNING
1435 "isdnloop: (%s) Could not allocate card-struct.\n", id);
1436 return (isdnloop_card *) 0;
1437 }
1438 memset((char *) card, 0, sizeof(isdnloop_card));
1439 card->interface.owner = THIS_MODULE;
1440 card->interface.channels = ISDNLOOP_BCH;
1441 card->interface.hl_hdrlen = 1; /* scratch area for storing ack flag*/
1442 card->interface.maxbufsize = 4000;
1443 card->interface.command = if_command;
1444 card->interface.writebuf_skb = if_sendbuf;
1445 card->interface.writecmd = if_writecmd;
1446 card->interface.readstat = if_readstatus;
1447 card->interface.features = ISDN_FEATURE_L2_X75I |
1448 #ifdef CONFIG_ISDN_X25
1449 ISDN_FEATURE_L2_X25DTE |
1450 ISDN_FEATURE_L2_X25DCE |
1451 #endif
1452 ISDN_FEATURE_L2_HDLC |
1453 ISDN_FEATURE_L3_TRANS |
1454 ISDN_FEATURE_P_UNKNOWN;
1455 card->ptype = ISDN_PTYPE_UNKNOWN;
1456 strlcpy(card->interface.id, id, sizeof(card->interface.id));
1457 card->msg_buf_write = card->msg_buf;
1458 card->msg_buf_read = card->msg_buf;
1459 card->msg_buf_end = &card->msg_buf[sizeof(card->msg_buf) - 1];
1460 for (i = 0; i < ISDNLOOP_BCH; i++) {
1461 card->l2_proto[i] = ISDN_PROTO_L2_X75I;
1462 skb_queue_head_init(&card->bqueue[i]);
1463 }
1464 skb_queue_head_init(&card->dqueue);
1465 card->isdnloop_lock = SPIN_LOCK_UNLOCKED;
1466 card->next = cards;
1467 cards = card;
1468 if (!register_isdn(&card->interface)) {
1469 cards = cards->next;
1470 printk(KERN_WARNING
1471 "isdnloop: Unable to register %s\n", id);
1472 kfree(card);
1473 return (isdnloop_card *) 0;
1474 }
1475 card->myid = card->interface.channels;
1476 return card;
1477 }
1478
1479 static int
1480 isdnloop_addcard(char *id1)
1481 {
1482 isdnloop_card *card;
1483
1484 if (!(card = isdnloop_initcard(id1))) {
1485 return -EIO;
1486 }
1487 printk(KERN_INFO
1488 "isdnloop: (%s) virtual card added\n",
1489 card->interface.id);
1490 return 0;
1491 }
1492
1493 static int __init
1494 isdnloop_init(void)
1495 {
1496 char *p;
1497 char rev[10];
1498
1499 if ((p = strchr(revision, ':'))) {
1500 strcpy(rev, p + 1);
1501 p = strchr(rev, '$');
1502 *p = 0;
1503 } else
1504 strcpy(rev, " ??? ");
1505 printk(KERN_NOTICE "isdnloop-ISDN-driver Rev%s\n", rev);
1506
1507 if (isdnloop_id)
1508 return (isdnloop_addcard(isdnloop_id));
1509
1510 return 0;
1511 }
1512
1513 static void __exit
1514 isdnloop_exit(void)
1515 {
1516 isdn_ctrl cmd;
1517 isdnloop_card *card = cards;
1518 isdnloop_card *last;
1519 int i;
1520
1521 isdnloop_stopallcards();
1522 while (card) {
1523 cmd.command = ISDN_STAT_UNLOAD;
1524 cmd.driver = card->myid;
1525 card->interface.statcallb(&cmd);
1526 for (i = 0; i < ISDNLOOP_BCH; i++)
1527 isdnloop_free_queue(card, i);
1528 card = card->next;
1529 }
1530 card = cards;
1531 while (card) {
1532 last = card;
1533 skb_queue_purge(&card->dqueue);
1534 card = card->next;
1535 kfree(last);
1536 }
1537 printk(KERN_NOTICE "isdnloop-ISDN-driver unloaded\n");
1538 }
1539
1540 module_init(isdnloop_init);
1541 module_exit(isdnloop_exit);
SocketAccessConTroL development