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/slab.h>
15 #include <linux/init.h>
16 #include <linux/sched.h>
17 #include "isdnloop.h"
18
19 static char *revision = "$Revision: 1.11.6.7 $";
20 static char *isdnloop_id = "loop0";
21
22 MODULE_DESCRIPTION("ISDN4Linux: Pseudo Driver that simulates an ISDN card");
23 MODULE_AUTHOR("Fritz Elfert");
24 MODULE_LICENSE("GPL");
25 module_param(isdnloop_id, charp, 0);
26 MODULE_PARM_DESC(isdnloop_id, "ID-String of first card");
27
28 static int isdnloop_addcard(char *);
29
30 /*
31 * Free queue completely.
32 *
33 * Parameter:
34 * card = pointer to card struct
35 * channel = channel number
36 */
37 static void
isdnloop_free_queue(isdnloop_card * card,int channel)38 isdnloop_free_queue(isdnloop_card * card, int channel)
39 {
40 struct sk_buff_head *queue = &card->bqueue[channel];
41
42 skb_queue_purge(queue);
43 card->sndcount[channel] = 0;
44 }
45
46 /*
47 * Send B-Channel data to another virtual card.
48 * This routine is called via timer-callback from isdnloop_pollbchan().
49 *
50 * Parameter:
51 * card = pointer to card struct.
52 * ch = channel number (0-based)
53 */
54 static void
isdnloop_bchan_send(isdnloop_card * card,int ch)55 isdnloop_bchan_send(isdnloop_card * card, int ch)
56 {
57 isdnloop_card *rcard = card->rcard[ch];
58 int rch = card->rch[ch], len, ack;
59 struct sk_buff *skb;
60 isdn_ctrl cmd;
61
62 while (card->sndcount[ch]) {
63 if ((skb = skb_dequeue(&card->bqueue[ch]))) {
64 len = skb->len;
65 card->sndcount[ch] -= len;
66 ack = *(skb->head); /* used as scratch area */
67 cmd.driver = card->myid;
68 cmd.arg = ch;
69 if (rcard){
70 rcard->interface.rcvcallb_skb(rcard->myid, rch, skb);
71 } else {
72 printk(KERN_WARNING "isdnloop: no rcard, skb dropped\n");
73 dev_kfree_skb(skb);
74
75 };
76 cmd.command = ISDN_STAT_BSENT;
77 cmd.parm.length = len;
78 card->interface.statcallb(&cmd);
79 } else
80 card->sndcount[ch] = 0;
81 }
82 }
83
84 /*
85 * Send/Receive Data to/from the B-Channel.
86 * This routine is called via timer-callback.
87 * It schedules itself while any B-Channel is open.
88 *
89 * Parameter:
90 * data = pointer to card struct, set by kernel timer.data
91 */
92 static void
isdnloop_pollbchan(unsigned long data)93 isdnloop_pollbchan(unsigned long data)
94 {
95 isdnloop_card *card = (isdnloop_card *) data;
96 unsigned long flags;
97
98 if (card->flags & ISDNLOOP_FLAGS_B1ACTIVE)
99 isdnloop_bchan_send(card, 0);
100 if (card->flags & ISDNLOOP_FLAGS_B2ACTIVE)
101 isdnloop_bchan_send(card, 1);
102 if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE)) {
103 /* schedule b-channel polling again */
104 spin_lock_irqsave(&card->isdnloop_lock, flags);
105 card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
106 add_timer(&card->rb_timer);
107 card->flags |= ISDNLOOP_FLAGS_RBTIMER;
108 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
109 } else
110 card->flags &= ~ISDNLOOP_FLAGS_RBTIMER;
111 }
112
113 /*
114 * Parse ICN-type setup string and fill fields of setup-struct
115 * with parsed data.
116 *
117 * Parameter:
118 * setup = setup string, format: [caller-id],si1,si2,[called-id]
119 * cmd = pointer to struct to be filled.
120 */
121 static void
isdnloop_parse_setup(char * setup,isdn_ctrl * cmd)122 isdnloop_parse_setup(char *setup, isdn_ctrl * cmd)
123 {
124 char *t = setup;
125 char *s = strchr(t, ',');
126
127 *s++ = '\0';
128 strlcpy(cmd->parm.setup.phone, t, sizeof(cmd->parm.setup.phone));
129 s = strchr(t = s, ',');
130 *s++ = '\0';
131 if (!strlen(t))
132 cmd->parm.setup.si1 = 0;
133 else
134 cmd->parm.setup.si1 = simple_strtoul(t, NULL, 10);
135 s = strchr(t = s, ',');
136 *s++ = '\0';
137 if (!strlen(t))
138 cmd->parm.setup.si2 = 0;
139 else
140 cmd->parm.setup.si2 =
141 simple_strtoul(t, NULL, 10);
142 strlcpy(cmd->parm.setup.eazmsn, s, sizeof(cmd->parm.setup.eazmsn));
143 cmd->parm.setup.plan = 0;
144 cmd->parm.setup.screen = 0;
145 }
146
147 typedef struct isdnloop_stat {
148 char *statstr;
149 int command;
150 int action;
151 } isdnloop_stat;
152 /* *INDENT-OFF* */
153 static isdnloop_stat isdnloop_stat_table[] =
154 {
155 {"BCON_", ISDN_STAT_BCONN, 1}, /* B-Channel connected */
156 {"BDIS_", ISDN_STAT_BHUP, 2}, /* B-Channel disconnected */
157 {"DCON_", ISDN_STAT_DCONN, 0}, /* D-Channel connected */
158 {"DDIS_", ISDN_STAT_DHUP, 0}, /* D-Channel disconnected */
159 {"DCAL_I", ISDN_STAT_ICALL, 3}, /* Incoming call dialup-line */
160 {"DSCA_I", ISDN_STAT_ICALL, 3}, /* Incoming call 1TR6-SPV */
161 {"FCALL", ISDN_STAT_ICALL, 4}, /* Leased line connection up */
162 {"CIF", ISDN_STAT_CINF, 5}, /* Charge-info, 1TR6-type */
163 {"AOC", ISDN_STAT_CINF, 6}, /* Charge-info, DSS1-type */
164 {"CAU", ISDN_STAT_CAUSE, 7}, /* Cause code */
165 {"TEI OK", ISDN_STAT_RUN, 0}, /* Card connected to wallplug */
166 {"E_L1: ACT FAIL", ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
167 {"E_L2: DATA LIN", ISDN_STAT_BHUP, 8}, /* Layer-2 data link lost */
168 {"E_L1: ACTIVATION FAILED",
169 ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
170 {NULL, 0, -1}
171 };
172 /* *INDENT-ON* */
173
174
175 /*
176 * Parse Status message-strings from virtual card.
177 * Depending on status, call statcallb for sending messages to upper
178 * levels. Also set/reset B-Channel active-flags.
179 *
180 * Parameter:
181 * status = status string to parse.
182 * channel = channel where message comes from.
183 * card = card where message comes from.
184 */
185 static void
isdnloop_parse_status(u_char * status,int channel,isdnloop_card * card)186 isdnloop_parse_status(u_char * status, int channel, isdnloop_card * card)
187 {
188 isdnloop_stat *s = isdnloop_stat_table;
189 int action = -1;
190 isdn_ctrl cmd;
191
192 while (s->statstr) {
193 if (!strncmp(status, s->statstr, strlen(s->statstr))) {
194 cmd.command = s->command;
195 action = s->action;
196 break;
197 }
198 s++;
199 }
200 if (action == -1)
201 return;
202 cmd.driver = card->myid;
203 cmd.arg = channel;
204 switch (action) {
205 case 1:
206 /* BCON_x */
207 card->flags |= (channel) ?
208 ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE;
209 break;
210 case 2:
211 /* BDIS_x */
212 card->flags &= ~((channel) ?
213 ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE);
214 isdnloop_free_queue(card, channel);
215 break;
216 case 3:
217 /* DCAL_I and DSCA_I */
218 isdnloop_parse_setup(status + 6, &cmd);
219 break;
220 case 4:
221 /* FCALL */
222 sprintf(cmd.parm.setup.phone, "LEASED%d", card->myid);
223 sprintf(cmd.parm.setup.eazmsn, "%d", channel + 1);
224 cmd.parm.setup.si1 = 7;
225 cmd.parm.setup.si2 = 0;
226 cmd.parm.setup.plan = 0;
227 cmd.parm.setup.screen = 0;
228 break;
229 case 5:
230 /* CIF */
231 strlcpy(cmd.parm.num, status + 3, sizeof(cmd.parm.num));
232 break;
233 case 6:
234 /* AOC */
235 snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%d",
236 (int) simple_strtoul(status + 7, NULL, 16));
237 break;
238 case 7:
239 /* CAU */
240 status += 3;
241 if (strlen(status) == 4)
242 snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%s%c%c",
243 status + 2, *status, *(status + 1));
244 else
245 strlcpy(cmd.parm.num, status + 1, sizeof(cmd.parm.num));
246 break;
247 case 8:
248 /* Misc Errors on L1 and L2 */
249 card->flags &= ~ISDNLOOP_FLAGS_B1ACTIVE;
250 isdnloop_free_queue(card, 0);
251 cmd.arg = 0;
252 cmd.driver = card->myid;
253 card->interface.statcallb(&cmd);
254 cmd.command = ISDN_STAT_DHUP;
255 cmd.arg = 0;
256 cmd.driver = card->myid;
257 card->interface.statcallb(&cmd);
258 cmd.command = ISDN_STAT_BHUP;
259 card->flags &= ~ISDNLOOP_FLAGS_B2ACTIVE;
260 isdnloop_free_queue(card, 1);
261 cmd.arg = 1;
262 cmd.driver = card->myid;
263 card->interface.statcallb(&cmd);
264 cmd.command = ISDN_STAT_DHUP;
265 cmd.arg = 1;
266 cmd.driver = card->myid;
267 break;
268 }
269 card->interface.statcallb(&cmd);
270 }
271
272 /*
273 * Store a cwcharacter into ringbuffer for reading from /dev/isdnctrl
274 *
275 * Parameter:
276 * card = pointer to card struct.
277 * c = char to store.
278 */
279 static void
isdnloop_putmsg(isdnloop_card * card,unsigned char c)280 isdnloop_putmsg(isdnloop_card * card, unsigned char c)
281 {
282 ulong flags;
283
284 spin_lock_irqsave(&card->isdnloop_lock, flags);
285 *card->msg_buf_write++ = (c == 0xff) ? '\n' : c;
286 if (card->msg_buf_write == card->msg_buf_read) {
287 if (++card->msg_buf_read > card->msg_buf_end)
288 card->msg_buf_read = card->msg_buf;
289 }
290 if (card->msg_buf_write > card->msg_buf_end)
291 card->msg_buf_write = card->msg_buf;
292 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
293 }
294
295 /*
296 * Poll a virtual cards message queue.
297 * If there are new status-replies from the card, copy them to
298 * ringbuffer for reading on /dev/isdnctrl and call
299 * isdnloop_parse_status() for processing them. Watch for special
300 * Firmware bootmessage and parse it, to get the D-Channel protocol.
301 * If there are B-Channels open, initiate a timer-callback to
302 * isdnloop_pollbchan().
303 * This routine is called periodically via timer interrupt.
304 *
305 * Parameter:
306 * data = pointer to card struct
307 */
308 static void
isdnloop_polldchan(unsigned long data)309 isdnloop_polldchan(unsigned long data)
310 {
311 isdnloop_card *card = (isdnloop_card *) data;
312 struct sk_buff *skb;
313 int avail;
314 int left;
315 u_char c;
316 int ch;
317 unsigned long flags;
318 u_char *p;
319 isdn_ctrl cmd;
320
321 if ((skb = skb_dequeue(&card->dqueue)))
322 avail = skb->len;
323 else
324 avail = 0;
325 for (left = avail; left > 0; left--) {
326 c = *skb->data;
327 skb_pull(skb, 1);
328 isdnloop_putmsg(card, c);
329 card->imsg[card->iptr] = c;
330 if (card->iptr < 59)
331 card->iptr++;
332 if (!skb->len) {
333 avail++;
334 isdnloop_putmsg(card, '\n');
335 card->imsg[card->iptr] = 0;
336 card->iptr = 0;
337 if (card->imsg[0] == '0' && card->imsg[1] >= '0' &&
338 card->imsg[1] <= '2' && card->imsg[2] == ';') {
339 ch = (card->imsg[1] - '0') - 1;
340 p = &card->imsg[3];
341 isdnloop_parse_status(p, ch, card);
342 } else {
343 p = card->imsg;
344 if (!strncmp(p, "DRV1.", 5)) {
345 printk(KERN_INFO "isdnloop: (%s) %s\n", CID, p);
346 if (!strncmp(p + 7, "TC", 2)) {
347 card->ptype = ISDN_PTYPE_1TR6;
348 card->interface.features |= ISDN_FEATURE_P_1TR6;
349 printk(KERN_INFO
350 "isdnloop: (%s) 1TR6-Protocol loaded and running\n", CID);
351 }
352 if (!strncmp(p + 7, "EC", 2)) {
353 card->ptype = ISDN_PTYPE_EURO;
354 card->interface.features |= ISDN_FEATURE_P_EURO;
355 printk(KERN_INFO
356 "isdnloop: (%s) Euro-Protocol loaded and running\n", CID);
357 }
358 continue;
359
360 }
361 }
362 }
363 }
364 if (avail) {
365 cmd.command = ISDN_STAT_STAVAIL;
366 cmd.driver = card->myid;
367 cmd.arg = avail;
368 card->interface.statcallb(&cmd);
369 }
370 if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE))
371 if (!(card->flags & ISDNLOOP_FLAGS_RBTIMER)) {
372 /* schedule b-channel polling */
373 card->flags |= ISDNLOOP_FLAGS_RBTIMER;
374 spin_lock_irqsave(&card->isdnloop_lock, flags);
375 del_timer(&card->rb_timer);
376 card->rb_timer.function = isdnloop_pollbchan;
377 card->rb_timer.data = (unsigned long) card;
378 card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
379 add_timer(&card->rb_timer);
380 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
381 }
382 /* schedule again */
383 spin_lock_irqsave(&card->isdnloop_lock, flags);
384 card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
385 add_timer(&card->st_timer);
386 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
387 }
388
389 /*
390 * Append a packet to the transmit buffer-queue.
391 *
392 * Parameter:
393 * channel = Number of B-channel
394 * skb = packet to send.
395 * card = pointer to card-struct
396 * Return:
397 * Number of bytes transferred, -E??? on error
398 */
399 static int
isdnloop_sendbuf(int channel,struct sk_buff * skb,isdnloop_card * card)400 isdnloop_sendbuf(int channel, struct sk_buff *skb, isdnloop_card * card)
401 {
402 int len = skb->len;
403 unsigned long flags;
404 struct sk_buff *nskb;
405
406 if (len > 4000) {
407 printk(KERN_WARNING
408 "isdnloop: Send packet too large\n");
409 return -EINVAL;
410 }
411 if (len) {
412 if (!(card->flags & (channel) ? ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE))
413 return 0;
414 if (card->sndcount[channel] > ISDNLOOP_MAX_SQUEUE)
415 return 0;
416 spin_lock_irqsave(&card->isdnloop_lock, flags);
417 nskb = dev_alloc_skb(skb->len);
418 if (nskb) {
419 skb_copy_from_linear_data(skb,
420 skb_put(nskb, len), len);
421 skb_queue_tail(&card->bqueue[channel], nskb);
422 dev_kfree_skb(skb);
423 } else
424 len = 0;
425 card->sndcount[channel] += len;
426 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
427 }
428 return len;
429 }
430
431 /*
432 * Read the messages from the card's ringbuffer
433 *
434 * Parameter:
435 * buf = pointer to buffer.
436 * len = number of bytes to read.
437 * user = flag, 1: called from userlevel 0: called from kernel.
438 * card = pointer to card struct.
439 * Return:
440 * number of bytes actually transferred.
441 */
442 static int
isdnloop_readstatus(u_char __user * buf,int len,isdnloop_card * card)443 isdnloop_readstatus(u_char __user *buf, int len, isdnloop_card * card)
444 {
445 int count;
446 u_char __user *p;
447
448 for (p = buf, count = 0; count < len; p++, count++) {
449 if (card->msg_buf_read == card->msg_buf_write)
450 return count;
451 if (put_user(*card->msg_buf_read++, p))
452 return -EFAULT;
453 if (card->msg_buf_read > card->msg_buf_end)
454 card->msg_buf_read = card->msg_buf;
455 }
456 return count;
457 }
458
459 /*
460 * Simulate a card's response by appending it to the cards
461 * message queue.
462 *
463 * Parameter:
464 * card = pointer to card struct.
465 * s = pointer to message-string.
466 * ch = channel: 0 = generic messages, 1 and 2 = D-channel messages.
467 * Return:
468 * 0 on success, 1 on memory squeeze.
469 */
470 static int
isdnloop_fake(isdnloop_card * card,char * s,int ch)471 isdnloop_fake(isdnloop_card * card, char *s, int ch)
472 {
473 struct sk_buff *skb;
474 int len = strlen(s) + ((ch >= 0) ? 3 : 0);
475
476 if (!(skb = dev_alloc_skb(len))) {
477 printk(KERN_WARNING "isdnloop: Out of memory in isdnloop_fake\n");
478 return 1;
479 }
480 if (ch >= 0)
481 sprintf(skb_put(skb, 3), "%02d;", ch);
482 memcpy(skb_put(skb, strlen(s)), s, strlen(s));
483 skb_queue_tail(&card->dqueue, skb);
484 return 0;
485 }
486 /* *INDENT-OFF* */
487 static isdnloop_stat isdnloop_cmd_table[] =
488 {
489 {"BCON_R", 0, 1}, /* B-Channel connect */
490 {"BCON_I", 0, 17}, /* B-Channel connect ind */
491 {"BDIS_R", 0, 2}, /* B-Channel disconnect */
492 {"DDIS_R", 0, 3}, /* D-Channel disconnect */
493 {"DCON_R", 0, 16}, /* D-Channel connect */
494 {"DSCA_R", 0, 4}, /* Dial 1TR6-SPV */
495 {"DCAL_R", 0, 5}, /* Dial */
496 {"EAZC", 0, 6}, /* Clear EAZ listener */
497 {"EAZ", 0, 7}, /* Set EAZ listener */
498 {"SEEAZ", 0, 8}, /* Get EAZ listener */
499 {"MSN", 0, 9}, /* Set/Clear MSN listener */
500 {"MSALL", 0, 10}, /* Set multi MSN listeners */
501 {"SETSIL", 0, 11}, /* Set SI list */
502 {"SEESIL", 0, 12}, /* Get SI list */
503 {"SILC", 0, 13}, /* Clear SI list */
504 {"LOCK", 0, -1}, /* LOCK channel */
505 {"UNLOCK", 0, -1}, /* UNLOCK channel */
506 {"FV2ON", 1, 14}, /* Leased mode on */
507 {"FV2OFF", 1, 15}, /* Leased mode off */
508 {NULL, 0, -1}
509 };
510 /* *INDENT-ON* */
511
512
513 /*
514 * Simulate an error-response from a card.
515 *
516 * Parameter:
517 * card = pointer to card struct.
518 */
519 static void
isdnloop_fake_err(isdnloop_card * card)520 isdnloop_fake_err(isdnloop_card * card)
521 {
522 char buf[60];
523
524 sprintf(buf, "E%s", card->omsg);
525 isdnloop_fake(card, buf, -1);
526 isdnloop_fake(card, "NAK", -1);
527 }
528
529 static u_char ctable_eu[] =
530 {0x00, 0x11, 0x01, 0x12};
531 static u_char ctable_1t[] =
532 {0x00, 0x3b, 0x01, 0x3a};
533
534 /*
535 * Assemble a simplified cause message depending on the
536 * D-channel protocol used.
537 *
538 * Parameter:
539 * card = pointer to card struct.
540 * loc = location: 0 = local, 1 = remote.
541 * cau = cause: 1 = busy, 2 = nonexistent callerid, 3 = no user responding.
542 * Return:
543 * Pointer to buffer containing the assembled message.
544 */
545 static char *
isdnloop_unicause(isdnloop_card * card,int loc,int cau)546 isdnloop_unicause(isdnloop_card * card, int loc, int cau)
547 {
548 static char buf[6];
549
550 switch (card->ptype) {
551 case ISDN_PTYPE_EURO:
552 sprintf(buf, "E%02X%02X", (loc) ? 4 : 2, ctable_eu[cau]);
553 break;
554 case ISDN_PTYPE_1TR6:
555 sprintf(buf, "%02X44", ctable_1t[cau]);
556 break;
557 default:
558 return ("0000");
559 }
560 return (buf);
561 }
562
563 /*
564 * Release a virtual connection. Called from timer interrupt, when
565 * called party did not respond.
566 *
567 * Parameter:
568 * card = pointer to card struct.
569 * ch = channel (0-based)
570 */
571 static void
isdnloop_atimeout(isdnloop_card * card,int ch)572 isdnloop_atimeout(isdnloop_card * card, int ch)
573 {
574 unsigned long flags;
575 char buf[60];
576
577 spin_lock_irqsave(&card->isdnloop_lock, flags);
578 if (card->rcard) {
579 isdnloop_fake(card->rcard[ch], "DDIS_I", card->rch[ch] + 1);
580 card->rcard[ch]->rcard[card->rch[ch]] = NULL;
581 card->rcard[ch] = NULL;
582 }
583 isdnloop_fake(card, "DDIS_I", ch + 1);
584 /* No user responding */
585 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 3));
586 isdnloop_fake(card, buf, ch + 1);
587 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
588 }
589
590 /*
591 * Wrapper for isdnloop_atimeout().
592 */
593 static void
isdnloop_atimeout0(unsigned long data)594 isdnloop_atimeout0(unsigned long data)
595 {
596 isdnloop_card *card = (isdnloop_card *) data;
597 isdnloop_atimeout(card, 0);
598 }
599
600 /*
601 * Wrapper for isdnloop_atimeout().
602 */
603 static void
isdnloop_atimeout1(unsigned long data)604 isdnloop_atimeout1(unsigned long data)
605 {
606 isdnloop_card *card = (isdnloop_card *) data;
607 isdnloop_atimeout(card, 1);
608 }
609
610 /*
611 * Install a watchdog for a user, not responding.
612 *
613 * Parameter:
614 * card = pointer to card struct.
615 * ch = channel to watch for.
616 */
617 static void
isdnloop_start_ctimer(isdnloop_card * card,int ch)618 isdnloop_start_ctimer(isdnloop_card * card, int ch)
619 {
620 unsigned long flags;
621
622 spin_lock_irqsave(&card->isdnloop_lock, flags);
623 init_timer(&card->c_timer[ch]);
624 card->c_timer[ch].expires = jiffies + ISDNLOOP_TIMER_ALERTWAIT;
625 if (ch)
626 card->c_timer[ch].function = isdnloop_atimeout1;
627 else
628 card->c_timer[ch].function = isdnloop_atimeout0;
629 card->c_timer[ch].data = (unsigned long) card;
630 add_timer(&card->c_timer[ch]);
631 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
632 }
633
634 /*
635 * Kill a pending channel watchdog.
636 *
637 * Parameter:
638 * card = pointer to card struct.
639 * ch = channel (0-based).
640 */
641 static void
isdnloop_kill_ctimer(isdnloop_card * card,int ch)642 isdnloop_kill_ctimer(isdnloop_card * card, int ch)
643 {
644 unsigned long flags;
645
646 spin_lock_irqsave(&card->isdnloop_lock, flags);
647 del_timer(&card->c_timer[ch]);
648 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
649 }
650
651 static u_char si2bit[] =
652 {0, 1, 0, 0, 0, 2, 0, 4, 0, 0};
653 static u_char bit2si[] =
654 {1, 5, 7};
655
656 /*
657 * Try finding a listener for an outgoing call.
658 *
659 * Parameter:
660 * card = pointer to calling card.
661 * p = pointer to ICN-type setup-string.
662 * lch = channel of calling card.
663 * cmd = pointer to struct to be filled when parsing setup.
664 * Return:
665 * 0 = found match, alerting should happen.
666 * 1 = found matching number but it is busy.
667 * 2 = no matching listener.
668 * 3 = found matching number but SI does not match.
669 */
670 static int
isdnloop_try_call(isdnloop_card * card,char * p,int lch,isdn_ctrl * cmd)671 isdnloop_try_call(isdnloop_card * card, char *p, int lch, isdn_ctrl * cmd)
672 {
673 isdnloop_card *cc = cards;
674 unsigned long flags;
675 int ch;
676 int num_match;
677 int i;
678 char *e;
679 char nbuf[32];
680
681 isdnloop_parse_setup(p, cmd);
682 while (cc) {
683 for (ch = 0; ch < 2; ch++) {
684 /* Exclude ourself */
685 if ((cc == card) && (ch == lch))
686 continue;
687 num_match = 0;
688 switch (cc->ptype) {
689 case ISDN_PTYPE_EURO:
690 for (i = 0; i < 3; i++)
691 if (!(strcmp(cc->s0num[i], cmd->parm.setup.phone)))
692 num_match = 1;
693 break;
694 case ISDN_PTYPE_1TR6:
695 e = cc->eazlist[ch];
696 while (*e) {
697 sprintf(nbuf, "%s%c", cc->s0num[0], *e);
698 if (!(strcmp(nbuf, cmd->parm.setup.phone)))
699 num_match = 1;
700 e++;
701 }
702 }
703 if (num_match) {
704 spin_lock_irqsave(&card->isdnloop_lock, flags);
705 /* channel idle? */
706 if (!(cc->rcard[ch])) {
707 /* Check SI */
708 if (!(si2bit[cmd->parm.setup.si1] & cc->sil[ch])) {
709 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
710 return 3;
711 }
712 /* ch is idle, si and number matches */
713 cc->rcard[ch] = card;
714 cc->rch[ch] = lch;
715 card->rcard[lch] = cc;
716 card->rch[lch] = ch;
717 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
718 return 0;
719 } else {
720 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
721 /* num matches, but busy */
722 if (ch == 1)
723 return 1;
724 }
725 }
726 }
727 cc = cc->next;
728 }
729 return 2;
730 }
731
732 /*
733 * Depending on D-channel protocol and caller/called, modify
734 * phone number.
735 *
736 * Parameter:
737 * card = pointer to card struct.
738 * phone = pointer phone number.
739 * caller = flag: 1 = caller, 0 = called.
740 * Return:
741 * pointer to new phone number.
742 */
743 static char *
isdnloop_vstphone(isdnloop_card * card,char * phone,int caller)744 isdnloop_vstphone(isdnloop_card * card, char *phone, int caller)
745 {
746 int i;
747 static char nphone[30];
748
749 if (!card) {
750 printk("BUG!!!\n");
751 return "";
752 }
753 switch (card->ptype) {
754 case ISDN_PTYPE_EURO:
755 if (caller) {
756 for (i = 0; i < 2; i++)
757 if (!(strcmp(card->s0num[i], phone)))
758 return (phone);
759 return (card->s0num[0]);
760 }
761 return (phone);
762 break;
763 case ISDN_PTYPE_1TR6:
764 if (caller) {
765 sprintf(nphone, "%s%c", card->s0num[0], phone[0]);
766 return (nphone);
767 } else
768 return (&phone[strlen(phone) - 1]);
769 break;
770 }
771 return "";
772 }
773
774 /*
775 * Parse an ICN-type command string sent to the 'card'.
776 * Perform misc. actions depending on the command.
777 *
778 * Parameter:
779 * card = pointer to card struct.
780 */
781 static void
isdnloop_parse_cmd(isdnloop_card * card)782 isdnloop_parse_cmd(isdnloop_card * card)
783 {
784 char *p = card->omsg;
785 isdn_ctrl cmd;
786 char buf[60];
787 isdnloop_stat *s = isdnloop_cmd_table;
788 int action = -1;
789 int i;
790 int ch;
791
792 if ((card->omsg[0] != '0') && (card->omsg[2] != ';')) {
793 isdnloop_fake_err(card);
794 return;
795 }
796 ch = card->omsg[1] - '0';
797 if ((ch < 0) || (ch > 2)) {
798 isdnloop_fake_err(card);
799 return;
800 }
801 p += 3;
802 while (s->statstr) {
803 if (!strncmp(p, s->statstr, strlen(s->statstr))) {
804 action = s->action;
805 if (s->command && (ch != 0)) {
806 isdnloop_fake_err(card);
807 return;
808 }
809 break;
810 }
811 s++;
812 }
813 if (action == -1)
814 return;
815 switch (action) {
816 case 1:
817 /* 0x;BCON_R */
818 if (card->rcard[ch - 1]) {
819 isdnloop_fake(card->rcard[ch - 1], "BCON_I",
820 card->rch[ch - 1] + 1);
821 isdnloop_fake(card, "BCON_C", ch);
822 }
823 break;
824 case 17:
825 /* 0x;BCON_I */
826 if (card->rcard[ch - 1]) {
827 isdnloop_fake(card->rcard[ch - 1], "BCON_C",
828 card->rch[ch - 1] + 1);
829 }
830 break;
831 case 2:
832 /* 0x;BDIS_R */
833 isdnloop_fake(card, "BDIS_C", ch);
834 if (card->rcard[ch - 1]) {
835 isdnloop_fake(card->rcard[ch - 1], "BDIS_I",
836 card->rch[ch - 1] + 1);
837 }
838 break;
839 case 16:
840 /* 0x;DCON_R */
841 isdnloop_kill_ctimer(card, ch - 1);
842 if (card->rcard[ch - 1]) {
843 isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
844 isdnloop_fake(card->rcard[ch - 1], "DCON_C",
845 card->rch[ch - 1] + 1);
846 isdnloop_fake(card, "DCON_C", ch);
847 }
848 break;
849 case 3:
850 /* 0x;DDIS_R */
851 isdnloop_kill_ctimer(card, ch - 1);
852 if (card->rcard[ch - 1]) {
853 isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
854 isdnloop_fake(card->rcard[ch - 1], "DDIS_I",
855 card->rch[ch - 1] + 1);
856 card->rcard[ch - 1] = NULL;
857 }
858 isdnloop_fake(card, "DDIS_C", ch);
859 break;
860 case 4:
861 /* 0x;DSCA_Rdd,yy,zz,oo */
862 if (card->ptype != ISDN_PTYPE_1TR6) {
863 isdnloop_fake_err(card);
864 return;
865 }
866 /* Fall through */
867 case 5:
868 /* 0x;DCAL_Rdd,yy,zz,oo */
869 p += 6;
870 switch (isdnloop_try_call(card, p, ch - 1, &cmd)) {
871 case 0:
872 /* Alerting */
873 sprintf(buf, "D%s_I%s,%02d,%02d,%s",
874 (action == 4) ? "SCA" : "CAL",
875 isdnloop_vstphone(card, cmd.parm.setup.eazmsn, 1),
876 cmd.parm.setup.si1,
877 cmd.parm.setup.si2,
878 isdnloop_vstphone(card->rcard[ch - 1],
879 cmd.parm.setup.phone, 0));
880 isdnloop_fake(card->rcard[ch - 1], buf, card->rch[ch - 1] + 1);
881 /* Fall through */
882 case 3:
883 /* si1 does not match, don't alert but start timer */
884 isdnloop_start_ctimer(card, ch - 1);
885 break;
886 case 1:
887 /* Remote busy */
888 isdnloop_fake(card, "DDIS_I", ch);
889 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 1));
890 isdnloop_fake(card, buf, ch);
891 break;
892 case 2:
893 /* No such user */
894 isdnloop_fake(card, "DDIS_I", ch);
895 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 2));
896 isdnloop_fake(card, buf, ch);
897 break;
898 }
899 break;
900 case 6:
901 /* 0x;EAZC */
902 card->eazlist[ch - 1][0] = '\0';
903 break;
904 case 7:
905 /* 0x;EAZ */
906 p += 3;
907 strcpy(card->eazlist[ch - 1], p);
908 break;
909 case 8:
910 /* 0x;SEEAZ */
911 sprintf(buf, "EAZ-LIST: %s", card->eazlist[ch - 1]);
912 isdnloop_fake(card, buf, ch + 1);
913 break;
914 case 9:
915 /* 0x;MSN */
916 break;
917 case 10:
918 /* 0x;MSNALL */
919 break;
920 case 11:
921 /* 0x;SETSIL */
922 p += 6;
923 i = 0;
924 while (strchr("0157", *p)) {
925 if (i)
926 card->sil[ch - 1] |= si2bit[*p - '0'];
927 i = (*p++ == '0');
928 }
929 if (*p)
930 isdnloop_fake_err(card);
931 break;
932 case 12:
933 /* 0x;SEESIL */
934 sprintf(buf, "SIN-LIST: ");
935 p = buf + 10;
936 for (i = 0; i < 3; i++)
937 if (card->sil[ch - 1] & (1 << i))
938 p += sprintf(p, "%02d", bit2si[i]);
939 isdnloop_fake(card, buf, ch + 1);
940 break;
941 case 13:
942 /* 0x;SILC */
943 card->sil[ch - 1] = 0;
944 break;
945 case 14:
946 /* 00;FV2ON */
947 break;
948 case 15:
949 /* 00;FV2OFF */
950 break;
951 }
952 }
953
954 /*
955 * Put command-strings into the of the 'card'. In reality, execute them
956 * right in place by calling isdnloop_parse_cmd(). Also copy every
957 * command to the read message ringbuffer, preceding it with a '>'.
958 * These mesagges can be read at /dev/isdnctrl.
959 *
960 * Parameter:
961 * buf = pointer to command buffer.
962 * len = length of buffer data.
963 * user = flag: 1 = called form userlevel, 0 called from kernel.
964 * card = pointer to card struct.
965 * Return:
966 * number of bytes transferred (currently always equals len).
967 */
968 static int
isdnloop_writecmd(const u_char * buf,int len,int user,isdnloop_card * card)969 isdnloop_writecmd(const u_char * buf, int len, int user, isdnloop_card * card)
970 {
971 int xcount = 0;
972 int ocount = 1;
973 isdn_ctrl cmd;
974
975 while (len) {
976 int count = len;
977 u_char *p;
978 u_char msg[0x100];
979
980 if (count > 255)
981 count = 255;
982 if (user) {
983 if (copy_from_user(msg, buf, count))
984 return -EFAULT;
985 } else
986 memcpy(msg, buf, count);
987 isdnloop_putmsg(card, '>');
988 for (p = msg; count > 0; count--, p++) {
989 len--;
990 xcount++;
991 isdnloop_putmsg(card, *p);
992 card->omsg[card->optr] = *p;
993 if (*p == '\n') {
994 card->omsg[card->optr] = '\0';
995 card->optr = 0;
996 isdnloop_parse_cmd(card);
997 if (len) {
998 isdnloop_putmsg(card, '>');
999 ocount++;
1000 }
1001 } else {
1002 if (card->optr < 59)
1003 card->optr++;
1004 }
1005 ocount++;
1006 }
1007 }
1008 cmd.command = ISDN_STAT_STAVAIL;
1009 cmd.driver = card->myid;
1010 cmd.arg = ocount;
1011 card->interface.statcallb(&cmd);
1012 return xcount;
1013 }
1014
1015 /*
1016 * Delete card's pending timers, send STOP to linklevel
1017 */
1018 static void
isdnloop_stopcard(isdnloop_card * card)1019 isdnloop_stopcard(isdnloop_card * card)
1020 {
1021 unsigned long flags;
1022 isdn_ctrl cmd;
1023
1024 spin_lock_irqsave(&card->isdnloop_lock, flags);
1025 if (card->flags & ISDNLOOP_FLAGS_RUNNING) {
1026 card->flags &= ~ISDNLOOP_FLAGS_RUNNING;
1027 del_timer(&card->st_timer);
1028 del_timer(&card->rb_timer);
1029 del_timer(&card->c_timer[0]);
1030 del_timer(&card->c_timer[1]);
1031 cmd.command = ISDN_STAT_STOP;
1032 cmd.driver = card->myid;
1033 card->interface.statcallb(&cmd);
1034 }
1035 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1036 }
1037
1038 /*
1039 * Stop all cards before unload.
1040 */
1041 static void
isdnloop_stopallcards(void)1042 isdnloop_stopallcards(void)
1043 {
1044 isdnloop_card *p = cards;
1045
1046 while (p) {
1047 isdnloop_stopcard(p);
1048 p = p->next;
1049 }
1050 }
1051
1052 /*
1053 * Start a 'card'. Simulate card's boot message and set the phone
1054 * number(s) of the virtual 'S0-Interface'. Install D-channel
1055 * poll timer.
1056 *
1057 * Parameter:
1058 * card = pointer to card struct.
1059 * sdefp = pointer to struct holding ioctl parameters.
1060 * Return:
1061 * 0 on success, -E??? otherwise.
1062 */
1063 static int
isdnloop_start(isdnloop_card * card,isdnloop_sdef * sdefp)1064 isdnloop_start(isdnloop_card * card, isdnloop_sdef * sdefp)
1065 {
1066 unsigned long flags;
1067 isdnloop_sdef sdef;
1068 int i;
1069
1070 if (card->flags & ISDNLOOP_FLAGS_RUNNING)
1071 return -EBUSY;
1072 if (copy_from_user((char *) &sdef, (char *) sdefp, sizeof(sdef)))
1073 return -EFAULT;
1074 spin_lock_irqsave(&card->isdnloop_lock, flags);
1075 switch (sdef.ptype) {
1076 case ISDN_PTYPE_EURO:
1077 if (isdnloop_fake(card, "DRV1.23EC-Q.931-CAPI-CNS-BASIS-20.02.96",
1078 -1)) {
1079 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1080 return -ENOMEM;
1081 }
1082 card->sil[0] = card->sil[1] = 4;
1083 if (isdnloop_fake(card, "TEI OK", 0)) {
1084 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1085 return -ENOMEM;
1086 }
1087 for (i = 0; i < 3; i++)
1088 strcpy(card->s0num[i], sdef.num[i]);
1089 break;
1090 case ISDN_PTYPE_1TR6:
1091 if (isdnloop_fake(card, "DRV1.04TC-1TR6-CAPI-CNS-BASIS-29.11.95",
1092 -1)) {
1093 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1094 return -ENOMEM;
1095 }
1096 card->sil[0] = card->sil[1] = 4;
1097 if (isdnloop_fake(card, "TEI OK", 0)) {
1098 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1099 return -ENOMEM;
1100 }
1101 strcpy(card->s0num[0], sdef.num[0]);
1102 card->s0num[1][0] = '\0';
1103 card->s0num[2][0] = '\0';
1104 break;
1105 default:
1106 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1107 printk(KERN_WARNING "isdnloop: Illegal D-channel protocol %d\n",
1108 sdef.ptype);
1109 return -EINVAL;
1110 }
1111 init_timer(&card->st_timer);
1112 card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
1113 card->st_timer.function = isdnloop_polldchan;
1114 card->st_timer.data = (unsigned long) card;
1115 add_timer(&card->st_timer);
1116 card->flags |= ISDNLOOP_FLAGS_RUNNING;
1117 spin_unlock_irqrestore(&card->isdnloop_lock, flags);
1118 return 0;
1119 }
1120
1121 /*
1122 * Main handler for commands sent by linklevel.
1123 */
1124 static int
isdnloop_command(isdn_ctrl * c,isdnloop_card * card)1125 isdnloop_command(isdn_ctrl * c, isdnloop_card * card)
1126 {
1127 ulong a;
1128 int i;
1129 char cbuf[60];
1130 isdn_ctrl cmd;
1131 isdnloop_cdef cdef;
1132
1133 switch (c->command) {
1134 case ISDN_CMD_IOCTL:
1135 memcpy(&a, c->parm.num, sizeof(ulong));
1136 switch (c->arg) {
1137 case ISDNLOOP_IOCTL_DEBUGVAR:
1138 return (ulong) card;
1139 case ISDNLOOP_IOCTL_STARTUP:
1140 if (!access_ok(VERIFY_READ, (void *) a, sizeof(isdnloop_sdef)))
1141 return -EFAULT;
1142 return (isdnloop_start(card, (isdnloop_sdef *) a));
1143 break;
1144 case ISDNLOOP_IOCTL_ADDCARD:
1145 if (copy_from_user((char *)&cdef,
1146 (char *)a,
1147 sizeof(cdef)))
1148 return -EFAULT;
1149 return (isdnloop_addcard(cdef.id1));
1150 break;
1151 case ISDNLOOP_IOCTL_LEASEDCFG:
1152 if (a) {
1153 if (!card->leased) {
1154 card->leased = 1;
1155 while (card->ptype == ISDN_PTYPE_UNKNOWN)
1156 schedule_timeout_interruptible(10);
1157 schedule_timeout_interruptible(10);
1158 sprintf(cbuf, "00;FV2ON\n01;EAZ1\n02;EAZ2\n");
1159 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1160 printk(KERN_INFO
1161 "isdnloop: (%s) Leased-line mode enabled\n",
1162 CID);
1163 cmd.command = ISDN_STAT_RUN;
1164 cmd.driver = card->myid;
1165 cmd.arg = 0;
1166 card->interface.statcallb(&cmd);
1167 }
1168 } else {
1169 if (card->leased) {
1170 card->leased = 0;
1171 sprintf(cbuf, "00;FV2OFF\n");
1172 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1173 printk(KERN_INFO
1174 "isdnloop: (%s) Leased-line mode disabled\n",
1175 CID);
1176 cmd.command = ISDN_STAT_RUN;
1177 cmd.driver = card->myid;
1178 cmd.arg = 0;
1179 card->interface.statcallb(&cmd);
1180 }
1181 }
1182 return 0;
1183 default:
1184 return -EINVAL;
1185 }
1186 break;
1187 case ISDN_CMD_DIAL:
1188 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1189 return -ENODEV;
1190 if (card->leased)
1191 break;
1192 if ((c->arg & 255) < ISDNLOOP_BCH) {
1193 char *p;
1194 char dial[50];
1195 char dcode[4];
1196
1197 a = c->arg;
1198 p = c->parm.setup.phone;
1199 if (*p == 's' || *p == 'S') {
1200 /* Dial for SPV */
1201 p++;
1202 strcpy(dcode, "SCA");
1203 } else
1204 /* Normal Dial */
1205 strcpy(dcode, "CAL");
1206 strcpy(dial, p);
1207 sprintf(cbuf, "%02d;D%s_R%s,%02d,%02d,%s\n", (int) (a + 1),
1208 dcode, dial, c->parm.setup.si1,
1209 c->parm.setup.si2, c->parm.setup.eazmsn);
1210 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1211 }
1212 break;
1213 case ISDN_CMD_ACCEPTD:
1214 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1215 return -ENODEV;
1216 if (c->arg < ISDNLOOP_BCH) {
1217 a = c->arg + 1;
1218 cbuf[0] = 0;
1219 switch (card->l2_proto[a - 1]) {
1220 case ISDN_PROTO_L2_X75I:
1221 sprintf(cbuf, "%02d;BX75\n", (int) a);
1222 break;
1223 #ifdef CONFIG_ISDN_X25
1224 case ISDN_PROTO_L2_X25DTE:
1225 sprintf(cbuf, "%02d;BX2T\n", (int) a);
1226 break;
1227 case ISDN_PROTO_L2_X25DCE:
1228 sprintf(cbuf, "%02d;BX2C\n", (int) a);
1229 break;
1230 #endif
1231 case ISDN_PROTO_L2_HDLC:
1232 sprintf(cbuf, "%02d;BTRA\n", (int) a);
1233 break;
1234 }
1235 if (strlen(cbuf))
1236 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1237 sprintf(cbuf, "%02d;DCON_R\n", (int) a);
1238 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1239 }
1240 break;
1241 case ISDN_CMD_ACCEPTB:
1242 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1243 return -ENODEV;
1244 if (c->arg < ISDNLOOP_BCH) {
1245 a = c->arg + 1;
1246 switch (card->l2_proto[a - 1]) {
1247 case ISDN_PROTO_L2_X75I:
1248 sprintf(cbuf, "%02d;BCON_R,BX75\n", (int) a);
1249 break;
1250 #ifdef CONFIG_ISDN_X25
1251 case ISDN_PROTO_L2_X25DTE:
1252 sprintf(cbuf, "%02d;BCON_R,BX2T\n", (int) a);
1253 break;
1254 case ISDN_PROTO_L2_X25DCE:
1255 sprintf(cbuf, "%02d;BCON_R,BX2C\n", (int) a);
1256 break;
1257 #endif
1258 case ISDN_PROTO_L2_HDLC:
1259 sprintf(cbuf, "%02d;BCON_R,BTRA\n", (int) a);
1260 break;
1261 default:
1262 sprintf(cbuf, "%02d;BCON_R\n", (int) a);
1263 }
1264 printk(KERN_DEBUG "isdnloop writecmd '%s'\n", cbuf);
1265 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1266 break;
1267 case ISDN_CMD_HANGUP:
1268 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1269 return -ENODEV;
1270 if (c->arg < ISDNLOOP_BCH) {
1271 a = c->arg + 1;
1272 sprintf(cbuf, "%02d;BDIS_R\n%02d;DDIS_R\n", (int) a, (int) a);
1273 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1274 }
1275 break;
1276 case ISDN_CMD_SETEAZ:
1277 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1278 return -ENODEV;
1279 if (card->leased)
1280 break;
1281 if (c->arg < ISDNLOOP_BCH) {
1282 a = c->arg + 1;
1283 if (card->ptype == ISDN_PTYPE_EURO) {
1284 sprintf(cbuf, "%02d;MS%s%s\n", (int) a,
1285 c->parm.num[0] ? "N" : "ALL", c->parm.num);
1286 } else
1287 sprintf(cbuf, "%02d;EAZ%s\n", (int) a,
1288 c->parm.num[0] ? c->parm.num : (u_char *) "0123456789");
1289 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1290 }
1291 break;
1292 case ISDN_CMD_CLREAZ:
1293 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1294 return -ENODEV;
1295 if (card->leased)
1296 break;
1297 if (c->arg < ISDNLOOP_BCH) {
1298 a = c->arg + 1;
1299 if (card->ptype == ISDN_PTYPE_EURO)
1300 sprintf(cbuf, "%02d;MSNC\n", (int) a);
1301 else
1302 sprintf(cbuf, "%02d;EAZC\n", (int) a);
1303 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1304 }
1305 break;
1306 case ISDN_CMD_SETL2:
1307 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1308 return -ENODEV;
1309 if ((c->arg & 255) < ISDNLOOP_BCH) {
1310 a = c->arg;
1311 switch (a >> 8) {
1312 case ISDN_PROTO_L2_X75I:
1313 sprintf(cbuf, "%02d;BX75\n", (int) (a & 255) + 1);
1314 break;
1315 #ifdef CONFIG_ISDN_X25
1316 case ISDN_PROTO_L2_X25DTE:
1317 sprintf(cbuf, "%02d;BX2T\n", (int) (a & 255) + 1);
1318 break;
1319 case ISDN_PROTO_L2_X25DCE:
1320 sprintf(cbuf, "%02d;BX2C\n", (int) (a & 255) + 1);
1321 break;
1322 #endif
1323 case ISDN_PROTO_L2_HDLC:
1324 sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
1325 break;
1326 case ISDN_PROTO_L2_TRANS:
1327 sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
1328 break;
1329 default:
1330 return -EINVAL;
1331 }
1332 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1333 card->l2_proto[a & 255] = (a >> 8);
1334 }
1335 break;
1336 case ISDN_CMD_SETL3:
1337 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1338 return -ENODEV;
1339 return 0;
1340 default:
1341 return -EINVAL;
1342 }
1343 }
1344 return 0;
1345 }
1346
1347 /*
1348 * Find card with given driverId
1349 */
1350 static inline isdnloop_card *
isdnloop_findcard(int driverid)1351 isdnloop_findcard(int driverid)
1352 {
1353 isdnloop_card *p = cards;
1354
1355 while (p) {
1356 if (p->myid == driverid)
1357 return p;
1358 p = p->next;
1359 }
1360 return (isdnloop_card *) 0;
1361 }
1362
1363 /*
1364 * Wrapper functions for interface to linklevel
1365 */
1366 static int
if_command(isdn_ctrl * c)1367 if_command(isdn_ctrl * c)
1368 {
1369 isdnloop_card *card = isdnloop_findcard(c->driver);
1370
1371 if (card)
1372 return (isdnloop_command(c, card));
1373 printk(KERN_ERR
1374 "isdnloop: if_command called with invalid driverId!\n");
1375 return -ENODEV;
1376 }
1377
1378 static int
if_writecmd(const u_char __user * buf,int len,int id,int channel)1379 if_writecmd(const u_char __user *buf, int len, int id, int channel)
1380 {
1381 isdnloop_card *card = isdnloop_findcard(id);
1382
1383 if (card) {
1384 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1385 return -ENODEV;
1386 return (isdnloop_writecmd(buf, len, 1, card));
1387 }
1388 printk(KERN_ERR
1389 "isdnloop: if_writecmd called with invalid driverId!\n");
1390 return -ENODEV;
1391 }
1392
1393 static int
if_readstatus(u_char __user * buf,int len,int id,int channel)1394 if_readstatus(u_char __user *buf, int len, int id, int channel)
1395 {
1396 isdnloop_card *card = isdnloop_findcard(id);
1397
1398 if (card) {
1399 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1400 return -ENODEV;
1401 return (isdnloop_readstatus(buf, len, card));
1402 }
1403 printk(KERN_ERR
1404 "isdnloop: if_readstatus called with invalid driverId!\n");
1405 return -ENODEV;
1406 }
1407
1408 static int
if_sendbuf(int id,int channel,int ack,struct sk_buff * skb)1409 if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
1410 {
1411 isdnloop_card *card = isdnloop_findcard(id);
1412
1413 if (card) {
1414 if (!(card->flags & ISDNLOOP_FLAGS_RUNNING))
1415 return -ENODEV;
1416 /* ack request stored in skb scratch area */
1417 *(skb->head) = ack;
1418 return (isdnloop_sendbuf(channel, skb, card));
1419 }
1420 printk(KERN_ERR
1421 "isdnloop: if_sendbuf called with invalid driverId!\n");
1422 return -ENODEV;
1423 }
1424
1425 /*
1426 * Allocate a new card-struct, initialize it
1427 * link it into cards-list and register it at linklevel.
1428 */
1429 static isdnloop_card *
isdnloop_initcard(char * id)1430 isdnloop_initcard(char *id)
1431 {
1432 isdnloop_card *card;
1433 int i;
1434
1435 if (!(card = kzalloc(sizeof(isdnloop_card), GFP_KERNEL))) {
1436 printk(KERN_WARNING
1437 "isdnloop: (%s) Could not allocate card-struct.\n", id);
1438 return (isdnloop_card *) 0;
1439 }
1440 card->interface.owner = THIS_MODULE;
1441 card->interface.channels = ISDNLOOP_BCH;
1442 card->interface.hl_hdrlen = 1; /* scratch area for storing ack flag*/
1443 card->interface.maxbufsize = 4000;
1444 card->interface.command = if_command;
1445 card->interface.writebuf_skb = if_sendbuf;
1446 card->interface.writecmd = if_writecmd;
1447 card->interface.readstat = if_readstatus;
1448 card->interface.features = ISDN_FEATURE_L2_X75I |
1449 #ifdef CONFIG_ISDN_X25
1450 ISDN_FEATURE_L2_X25DTE |
1451 ISDN_FEATURE_L2_X25DCE |
1452 #endif
1453 ISDN_FEATURE_L2_HDLC |
1454 ISDN_FEATURE_L3_TRANS |
1455 ISDN_FEATURE_P_UNKNOWN;
1456 card->ptype = ISDN_PTYPE_UNKNOWN;
1457 strlcpy(card->interface.id, id, sizeof(card->interface.id));
1458 card->msg_buf_write = card->msg_buf;
1459 card->msg_buf_read = card->msg_buf;
1460 card->msg_buf_end = &card->msg_buf[sizeof(card->msg_buf) - 1];
1461 for (i = 0; i < ISDNLOOP_BCH; i++) {
1462 card->l2_proto[i] = ISDN_PROTO_L2_X75I;
1463 skb_queue_head_init(&card->bqueue[i]);
1464 }
1465 skb_queue_head_init(&card->dqueue);
1466 spin_lock_init(&card->isdnloop_lock);
1467 card->next = cards;
1468 cards = card;
1469 if (!register_isdn(&card->interface)) {
1470 cards = cards->next;
1471 printk(KERN_WARNING
1472 "isdnloop: Unable to register %s\n", id);
1473 kfree(card);
1474 return (isdnloop_card *) 0;
1475 }
1476 card->myid = card->interface.channels;
1477 return card;
1478 }
1479
1480 static int
isdnloop_addcard(char * id1)1481 isdnloop_addcard(char *id1)
1482 {
1483 isdnloop_card *card;
1484
1485 if (!(card = isdnloop_initcard(id1))) {
1486 return -EIO;
1487 }
1488 printk(KERN_INFO
1489 "isdnloop: (%s) virtual card added\n",
1490 card->interface.id);
1491 return 0;
1492 }
1493
1494 static int __init
isdnloop_init(void)1495 isdnloop_init(void)
1496 {
1497 char *p;
1498 char rev[10];
1499
1500 if ((p = strchr(revision, ':'))) {
1501 strcpy(rev, p + 1);
1502 p = strchr(rev, '$');
1503 *p = 0;
1504 } else
1505 strcpy(rev, " ??? ");
1506 printk(KERN_NOTICE "isdnloop-ISDN-driver Rev%s\n", rev);
1507
1508 if (isdnloop_id)
1509 return (isdnloop_addcard(isdnloop_id));
1510
1511 return 0;
1512 }
1513
1514 static void __exit
isdnloop_exit(void)1515 isdnloop_exit(void)
1516 {
1517 isdn_ctrl cmd;
1518 isdnloop_card *card = cards;
1519 isdnloop_card *last;
1520 int i;
1521
1522 isdnloop_stopallcards();
1523 while (card) {
1524 cmd.command = ISDN_STAT_UNLOAD;
1525 cmd.driver = card->myid;
1526 card->interface.statcallb(&cmd);
1527 for (i = 0; i < ISDNLOOP_BCH; i++)
1528 isdnloop_free_queue(card, i);
1529 card = card->next;
1530 }
1531 card = cards;
1532 while (card) {
1533 last = card;
1534 skb_queue_purge(&card->dqueue);
1535 card = card->next;
1536 kfree(last);
1537 }
1538 printk(KERN_NOTICE "isdnloop-ISDN-driver unloaded\n");
1539 }
1540
1541 module_init(isdnloop_init);
1542 module_exit(isdnloop_exit);
1543