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initial commit with v2.6.9
[linux-2.6.9-moxart.git] / drivers / isdn / isdnloop / isdnloop.c
blob544f41b413ed98683b8f0938ad509b0555d10010
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/config.h>
13 #include <linux/module.h>
14 #include <linux/interrupt.h>
15 #include <linux/init.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_PARM(isdnloop_id, "s");
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 save_flags(flags);
104 cli();
105 card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
106 add_timer(&card->rb_timer);
107 card->flags |= ISDNLOOP_FLAGS_RBTIMER;
108 restore_flags(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
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
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
280 isdnloop_putmsg(isdnloop_card * card, unsigned char c)
281 {
282 ulong flags;
283
284 save_flags(flags);
285 cli();
286 *card->msg_buf_write++ = (c == 0xff) ? '\n' : c;
287 if (card->msg_buf_write == card->msg_buf_read) {
288 if (++card->msg_buf_read > card->msg_buf_end)
289 card->msg_buf_read = card->msg_buf;
290 }
291 if (card->msg_buf_write > card->msg_buf_end)
292 card->msg_buf_write = card->msg_buf;
293 restore_flags(flags);
294 }
295
296 /*
297 * Poll a virtual cards message queue.
298 * If there are new status-replies from the card, copy them to
299 * ringbuffer for reading on /dev/isdnctrl and call
300 * isdnloop_parse_status() for processing them. Watch for special
301 * Firmware bootmessage and parse it, to get the D-Channel protocol.
302 * If there are B-Channels open, initiate a timer-callback to
303 * isdnloop_pollbchan().
304 * This routine is called periodically via timer interrupt.
305 *
306 * Parameter:
307 * data = pointer to card struct
308 */
309 static void
310 isdnloop_polldchan(unsigned long data)
311 {
312 isdnloop_card *card = (isdnloop_card *) data;
313 struct sk_buff *skb;
314 int avail;
315 int left;
316 u_char c;
317 int ch;
318 unsigned long flags;
319 u_char *p;
320 isdn_ctrl cmd;
321
322 if ((skb = skb_dequeue(&card->dqueue)))
323 avail = skb->len;
324 else
325 avail = 0;
326 for (left = avail; left > 0; left--) {
327 c = *skb->data;
328 skb_pull(skb, 1);
329 isdnloop_putmsg(card, c);
330 card->imsg[card->iptr] = c;
331 if (card->iptr < 59)
332 card->iptr++;
333 if (!skb->len) {
334 avail++;
335 isdnloop_putmsg(card, '\n');
336 card->imsg[card->iptr] = 0;
337 card->iptr = 0;
338 if (card->imsg[0] == '0' && card->imsg[1] >= '0' &&
339 card->imsg[1] <= '2' && card->imsg[2] == ';') {
340 ch = (card->imsg[1] - '0') - 1;
341 p = &card->imsg[3];
342 isdnloop_parse_status(p, ch, card);
343 } else {
344 p = card->imsg;
345 if (!strncmp(p, "DRV1.", 5)) {
346 printk(KERN_INFO "isdnloop: (%s) %s\n", CID, p);
347 if (!strncmp(p + 7, "TC", 2)) {
348 card->ptype = ISDN_PTYPE_1TR6;
349 card->interface.features |= ISDN_FEATURE_P_1TR6;
350 printk(KERN_INFO
351 "isdnloop: (%s) 1TR6-Protocol loaded and running\n", CID);
352 }
353 if (!strncmp(p + 7, "EC", 2)) {
354 card->ptype = ISDN_PTYPE_EURO;
355 card->interface.features |= ISDN_FEATURE_P_EURO;
356 printk(KERN_INFO
357 "isdnloop: (%s) Euro-Protocol loaded and running\n", CID);
358 }
359 continue;
360
361 }
362 }
363 }
364 }
365 if (avail) {
366 cmd.command = ISDN_STAT_STAVAIL;
367 cmd.driver = card->myid;
368 cmd.arg = avail;
369 card->interface.statcallb(&cmd);
370 }
371 if (card->flags & (ISDNLOOP_FLAGS_B1ACTIVE | ISDNLOOP_FLAGS_B2ACTIVE))
372 if (!(card->flags & ISDNLOOP_FLAGS_RBTIMER)) {
373 /* schedule b-channel polling */
374 card->flags |= ISDNLOOP_FLAGS_RBTIMER;
375 save_flags(flags);
376 cli();
377 del_timer(&card->rb_timer);
378 card->rb_timer.function = isdnloop_pollbchan;
379 card->rb_timer.data = (unsigned long) card;
380 card->rb_timer.expires = jiffies + ISDNLOOP_TIMER_BCREAD;
381 add_timer(&card->rb_timer);
382 restore_flags(flags);
383 }
384 /* schedule again */
385 save_flags(flags);
386 cli();
387 card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
388 add_timer(&card->st_timer);
389 restore_flags(flags);
390 }
391
392 /*
393 * Append a packet to the transmit buffer-queue.
394 *
395 * Parameter:
396 * channel = Number of B-channel
397 * skb = packet to send.
398 * card = pointer to card-struct
399 * Return:
400 * Number of bytes transferred, -E??? on error
401 */
402 static int
403 isdnloop_sendbuf(int channel, struct sk_buff *skb, isdnloop_card * card)
404 {
405 int len = skb->len;
406 unsigned long flags;
407 struct sk_buff *nskb;
408
409 if (len > 4000) {
410 printk(KERN_WARNING
411 "isdnloop: Send packet too large\n");
412 return -EINVAL;
413 }
414 if (len) {
415 if (!(card->flags & (channel) ? ISDNLOOP_FLAGS_B2ACTIVE : ISDNLOOP_FLAGS_B1ACTIVE))
416 return 0;
417 if (card->sndcount[channel] > ISDNLOOP_MAX_SQUEUE)
418 return 0;
419 save_flags(flags);
420 cli();
421 nskb = dev_alloc_skb(skb->len);
422 if (nskb) {
423 memcpy(skb_put(nskb, len), skb->data, len);
424 skb_queue_tail(&card->bqueue[channel], nskb);
425 dev_kfree_skb(skb);
426 } else
427 len = 0;
428 card->sndcount[channel] += len;
429 restore_flags(flags);
430 }
431 return len;
432 }
433
434 /*
435 * Read the messages from the card's ringbuffer
436 *
437 * Parameter:
438 * buf = pointer to buffer.
439 * len = number of bytes to read.
440 * user = flag, 1: called from userlevel 0: called from kernel.
441 * card = pointer to card struct.
442 * Return:
443 * number of bytes actually transferred.
444 */
445 static int
446 isdnloop_readstatus(u_char __user *buf, int len, isdnloop_card * card)
447 {
448 int count;
449 u_char __user *p;
450
451 for (p = buf, count = 0; count < len; p++, count++) {
452 if (card->msg_buf_read == card->msg_buf_write)
453 return count;
454 put_user(*card->msg_buf_read++, p);
455 if (card->msg_buf_read > card->msg_buf_end)
456 card->msg_buf_read = card->msg_buf;
457 }
458 return count;
459 }
460
461 /*
462 * Simulate a card's response by appending it to the cards
463 * message queue.
464 *
465 * Parameter:
466 * card = pointer to card struct.
467 * s = pointer to message-string.
468 * ch = channel: 0 = generic messages, 1 and 2 = D-channel messages.
469 * Return:
470 * 0 on success, 1 on memory squeeze.
471 */
472 static int
473 isdnloop_fake(isdnloop_card * card, char *s, int ch)
474 {
475 struct sk_buff *skb;
476 int len = strlen(s) + ((ch >= 0) ? 3 : 0);
477
478 if (!(skb = dev_alloc_skb(len))) {
479 printk(KERN_WARNING "isdnloop: Out of memory in isdnloop_fake\n");
480 return 1;
481 }
482 if (ch >= 0)
483 sprintf(skb_put(skb, 3), "%02d;", ch);
484 memcpy(skb_put(skb, strlen(s)), s, strlen(s));
485 skb_queue_tail(&card->dqueue, skb);
486 return 0;
487 }
488 /* *INDENT-OFF* */
489 static isdnloop_stat isdnloop_cmd_table[] =
490 {
491 {"BCON_R", 0, 1}, /* B-Channel connect */
492 {"BCON_I", 0, 17}, /* B-Channel connect ind */
493 {"BDIS_R", 0, 2}, /* B-Channel disconnect */
494 {"DDIS_R", 0, 3}, /* D-Channel disconnect */
495 {"DCON_R", 0, 16}, /* D-Channel connect */
496 {"DSCA_R", 0, 4}, /* Dial 1TR6-SPV */
497 {"DCAL_R", 0, 5}, /* Dial */
498 {"EAZC", 0, 6}, /* Clear EAZ listener */
499 {"EAZ", 0, 7}, /* Set EAZ listener */
500 {"SEEAZ", 0, 8}, /* Get EAZ listener */
501 {"MSN", 0, 9}, /* Set/Clear MSN listener */
502 {"MSALL", 0, 10}, /* Set multi MSN listeners */
503 {"SETSIL", 0, 11}, /* Set SI list */
504 {"SEESIL", 0, 12}, /* Get SI list */
505 {"SILC", 0, 13}, /* Clear SI list */
506 {"LOCK", 0, -1}, /* LOCK channel */
507 {"UNLOCK", 0, -1}, /* UNLOCK channel */
508 {"FV2ON", 1, 14}, /* Leased mode on */
509 {"FV2OFF", 1, 15}, /* Leased mode off */
510 {NULL, 0, -1}
511 };
512 /* *INDENT-ON* */
513
514
515 /*
516 * Simulate an error-response from a card.
517 *
518 * Parameter:
519 * card = pointer to card struct.
520 */
521 static void
522 isdnloop_fake_err(isdnloop_card * card)
523 {
524 char buf[60];
525
526 sprintf(buf, "E%s", card->omsg);
527 isdnloop_fake(card, buf, -1);
528 isdnloop_fake(card, "NAK", -1);
529 }
530
531 static u_char ctable_eu[] =
532 {0x00, 0x11, 0x01, 0x12};
533 static u_char ctable_1t[] =
534 {0x00, 0x3b, 0x01, 0x3a};
535
536 /*
537 * Assemble a simplified cause message depending on the
538 * D-channel protocol used.
539 *
540 * Parameter:
541 * card = pointer to card struct.
542 * loc = location: 0 = local, 1 = remote.
543 * cau = cause: 1 = busy, 2 = nonexistent callerid, 3 = no user responding.
544 * Return:
545 * Pointer to buffer containing the assembled message.
546 */
547 static char *
548 isdnloop_unicause(isdnloop_card * card, int loc, int cau)
549 {
550 static char buf[6];
551
552 switch (card->ptype) {
553 case ISDN_PTYPE_EURO:
554 sprintf(buf, "E%02X%02X", (loc) ? 4 : 2, ctable_eu[cau]);
555 break;
556 case ISDN_PTYPE_1TR6:
557 sprintf(buf, "%02X44", ctable_1t[cau]);
558 break;
559 default:
560 return ("0000");
561 }
562 return (buf);
563 }
564
565 /*
566 * Release a virtual connection. Called from timer interrupt, when
567 * called party did not respond.
568 *
569 * Parameter:
570 * card = pointer to card struct.
571 * ch = channel (0-based)
572 */
573 static void
574 isdnloop_atimeout(isdnloop_card * card, int ch)
575 {
576 unsigned long flags;
577 char buf[60];
578
579 save_flags(flags);
580 cli();
581 if (card->rcard) {
582 isdnloop_fake(card->rcard[ch], "DDIS_I", card->rch[ch] + 1);
583 card->rcard[ch]->rcard[card->rch[ch]] = NULL;
584 card->rcard[ch] = NULL;
585 }
586 isdnloop_fake(card, "DDIS_I", ch + 1);
587 /* No user responding */
588 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 3));
589 isdnloop_fake(card, buf, ch + 1);
590 restore_flags(flags);
591 }
592
593 /*
594 * Wrapper for isdnloop_atimeout().
595 */
596 static void
597 isdnloop_atimeout0(unsigned long data)
598 {
599 isdnloop_card *card = (isdnloop_card *) data;
600 isdnloop_atimeout(card, 0);
601 }
602
603 /*
604 * Wrapper for isdnloop_atimeout().
605 */
606 static void
607 isdnloop_atimeout1(unsigned long data)
608 {
609 isdnloop_card *card = (isdnloop_card *) data;
610 isdnloop_atimeout(card, 1);
611 }
612
613 /*
614 * Install a watchdog for a user, not responding.
615 *
616 * Parameter:
617 * card = pointer to card struct.
618 * ch = channel to watch for.
619 */
620 static void
621 isdnloop_start_ctimer(isdnloop_card * card, int ch)
622 {
623 unsigned long flags;
624
625 save_flags(flags);
626 cli();
627 init_timer(&card->c_timer[ch]);
628 card->c_timer[ch].expires = jiffies + ISDNLOOP_TIMER_ALERTWAIT;
629 if (ch)
630 card->c_timer[ch].function = isdnloop_atimeout1;
631 else
632 card->c_timer[ch].function = isdnloop_atimeout0;
633 card->c_timer[ch].data = (unsigned long) card;
634 add_timer(&card->c_timer[ch]);
635 restore_flags(flags);
636 }
637
638 /*
639 * Kill a pending channel watchdog.
640 *
641 * Parameter:
642 * card = pointer to card struct.
643 * ch = channel (0-based).
644 */
645 static void
646 isdnloop_kill_ctimer(isdnloop_card * card, int ch)
647 {
648 unsigned long flags;
649
650 save_flags(flags);
651 cli();
652 del_timer(&card->c_timer[ch]);
653 restore_flags(flags);
654 }
655
656 static u_char si2bit[] =
657 {0, 1, 0, 0, 0, 2, 0, 4, 0, 0};
658 static u_char bit2si[] =
659 {1, 5, 7};
660
661 /*
662 * Try finding a listener for an outgoing call.
663 *
664 * Parameter:
665 * card = pointer to calling card.
666 * p = pointer to ICN-type setup-string.
667 * lch = channel of calling card.
668 * cmd = pointer to struct to be filled when parsing setup.
669 * Return:
670 * 0 = found match, alerting should happen.
671 * 1 = found matching number but it is busy.
672 * 2 = no matching listener.
673 * 3 = found matching number but SI does not match.
674 */
675 static int
676 isdnloop_try_call(isdnloop_card * card, char *p, int lch, isdn_ctrl * cmd)
677 {
678 isdnloop_card *cc = cards;
679 unsigned long flags;
680 int ch;
681 int num_match;
682 int i;
683 char *e;
684 char nbuf[32];
685
686 isdnloop_parse_setup(p, cmd);
687 while (cc) {
688 for (ch = 0; ch < 2; ch++) {
689 /* Exclude ourself */
690 if ((cc == card) && (ch == lch))
691 continue;
692 num_match = 0;
693 switch (cc->ptype) {
694 case ISDN_PTYPE_EURO:
695 for (i = 0; i < 3; i++)
696 if (!(strcmp(cc->s0num[i], cmd->parm.setup.phone)))
697 num_match = 1;
698 break;
699 case ISDN_PTYPE_1TR6:
700 e = cc->eazlist[ch];
701 while (*e) {
702 sprintf(nbuf, "%s%c", cc->s0num[0], *e);
703 if (!(strcmp(nbuf, cmd->parm.setup.phone)))
704 num_match = 1;
705 e++;
706 }
707 }
708 if (num_match) {
709 save_flags(flags);
710 cli();
711 /* channel idle? */
712 if (!(cc->rcard[ch])) {
713 /* Check SI */
714 if (!(si2bit[cmd->parm.setup.si1] & cc->sil[ch])) {
715 restore_flags(flags);
716 return 3;
717 }
718 /* ch is idle, si and number matches */
719 cc->rcard[ch] = card;
720 cc->rch[ch] = lch;
721 card->rcard[lch] = cc;
722 card->rch[lch] = ch;
723 restore_flags(flags);
724 return 0;
725 } else {
726 restore_flags(flags);
727 /* num matches, but busy */
728 if (ch == 1)
729 return 1;
730 }
731 }
732 }
733 cc = cc->next;
734 }
735 return 2;
736 }
737
738 /*
739 * Depending on D-channel protocol and caller/called, modify
740 * phone number.
741 *
742 * Parameter:
743 * card = pointer to card struct.
744 * phone = pointer phone number.
745 * caller = flag: 1 = caller, 0 = called.
746 * Return:
747 * pointer to new phone number.
748 */
749 static char *
750 isdnloop_vstphone(isdnloop_card * card, char *phone, int caller)
751 {
752 int i;
753 static char nphone[30];
754
755 if (!card) {
756 printk("BUG!!!\n");
757 return "";
758 }
759 switch (card->ptype) {
760 case ISDN_PTYPE_EURO:
761 if (caller) {
762 for (i = 0; i < 2; i++)
763 if (!(strcmp(card->s0num[i], phone)))
764 return (phone);
765 return (card->s0num[0]);
766 }
767 return (phone);
768 break;
769 case ISDN_PTYPE_1TR6:
770 if (caller) {
771 sprintf(nphone, "%s%c", card->s0num[0], phone[0]);
772 return (nphone);
773 } else
774 return (&phone[strlen(phone) - 1]);
775 break;
776 }
777 return "";
778 }
779
780 /*
781 * Parse an ICN-type command string sent to the 'card'.
782 * Perform misc. actions depending on the command.
783 *
784 * Parameter:
785 * card = pointer to card struct.
786 */
787 static void
788 isdnloop_parse_cmd(isdnloop_card * card)
789 {
790 char *p = card->omsg;
791 isdn_ctrl cmd;
792 char buf[60];
793 isdnloop_stat *s = isdnloop_cmd_table;
794 int action = -1;
795 int i;
796 int ch;
797
798 if ((card->omsg[0] != '0') && (card->omsg[2] != ';')) {
799 isdnloop_fake_err(card);
800 return;
801 }
802 ch = card->omsg[1] - '0';
803 if ((ch < 0) || (ch > 2)) {
804 isdnloop_fake_err(card);
805 return;
806 }
807 p += 3;
808 while (s->statstr) {
809 if (!strncmp(p, s->statstr, strlen(s->statstr))) {
810 action = s->action;
811 if (s->command && (ch != 0)) {
812 isdnloop_fake_err(card);
813 return;
814 }
815 break;
816 }
817 s++;
818 }
819 if (action == -1)
820 return;
821 switch (action) {
822 case 1:
823 /* 0x;BCON_R */
824 if (card->rcard[ch - 1]) {
825 isdnloop_fake(card->rcard[ch - 1], "BCON_I",
826 card->rch[ch - 1] + 1);
827 isdnloop_fake(card, "BCON_C", ch);
828 }
829 break;
830 case 17:
831 /* 0x;BCON_I */
832 if (card->rcard[ch - 1]) {
833 isdnloop_fake(card->rcard[ch - 1], "BCON_C",
834 card->rch[ch - 1] + 1);
835 }
836 break;
837 case 2:
838 /* 0x;BDIS_R */
839 isdnloop_fake(card, "BDIS_C", ch);
840 if (card->rcard[ch - 1]) {
841 isdnloop_fake(card->rcard[ch - 1], "BDIS_I",
842 card->rch[ch - 1] + 1);
843 }
844 break;
845 case 16:
846 /* 0x;DCON_R */
847 isdnloop_kill_ctimer(card, ch - 1);
848 if (card->rcard[ch - 1]) {
849 isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
850 isdnloop_fake(card->rcard[ch - 1], "DCON_C",
851 card->rch[ch - 1] + 1);
852 isdnloop_fake(card, "DCON_C", ch);
853 }
854 break;
855 case 3:
856 /* 0x;DDIS_R */
857 isdnloop_kill_ctimer(card, ch - 1);
858 if (card->rcard[ch - 1]) {
859 isdnloop_kill_ctimer(card->rcard[ch - 1], card->rch[ch - 1]);
860 isdnloop_fake(card->rcard[ch - 1], "DDIS_I",
861 card->rch[ch - 1] + 1);
862 card->rcard[ch - 1] = NULL;
863 }
864 isdnloop_fake(card, "DDIS_C", ch);
865 break;
866 case 4:
867 /* 0x;DSCA_Rdd,yy,zz,oo */
868 if (card->ptype != ISDN_PTYPE_1TR6) {
869 isdnloop_fake_err(card);
870 return;
871 }
872 /* Fall through */
873 case 5:
874 /* 0x;DCAL_Rdd,yy,zz,oo */
875 p += 6;
876 switch (isdnloop_try_call(card, p, ch - 1, &cmd)) {
877 case 0:
878 /* Alerting */
879 sprintf(buf, "D%s_I%s,%02d,%02d,%s",
880 (action == 4) ? "SCA" : "CAL",
881 isdnloop_vstphone(card, cmd.parm.setup.eazmsn, 1),
882 cmd.parm.setup.si1,
883 cmd.parm.setup.si2,
884 isdnloop_vstphone(card->rcard[ch - 1],
885 cmd.parm.setup.phone, 0));
886 isdnloop_fake(card->rcard[ch - 1], buf, card->rch[ch - 1] + 1);
887 /* Fall through */
888 case 3:
889 /* si1 does not match, don't alert but start timer */
890 isdnloop_start_ctimer(card, ch - 1);
891 break;
892 case 1:
893 /* Remote busy */
894 isdnloop_fake(card, "DDIS_I", ch);
895 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 1));
896 isdnloop_fake(card, buf, ch);
897 break;
898 case 2:
899 /* No such user */
900 isdnloop_fake(card, "DDIS_I", ch);
901 sprintf(buf, "CAU%s", isdnloop_unicause(card, 1, 2));
902 isdnloop_fake(card, buf, ch);
903 break;
904 }
905 break;
906 case 6:
907 /* 0x;EAZC */
908 card->eazlist[ch - 1][0] = '\0';
909 break;
910 case 7:
911 /* 0x;EAZ */
912 p += 3;
913 strcpy(card->eazlist[ch - 1], p);
914 break;
915 case 8:
916 /* 0x;SEEAZ */
917 sprintf(buf, "EAZ-LIST: %s", card->eazlist[ch - 1]);
918 isdnloop_fake(card, buf, ch + 1);
919 break;
920 case 9:
921 /* 0x;MSN */
922 break;
923 case 10:
924 /* 0x;MSNALL */
925 break;
926 case 11:
927 /* 0x;SETSIL */
928 p += 6;
929 i = 0;
930 while (strchr("0157", *p)) {
931 if (i)
932 card->sil[ch - 1] |= si2bit[*p - '0'];
933 i = (*p++ == '0');
934 }
935 if (*p)
936 isdnloop_fake_err(card);
937 break;
938 case 12:
939 /* 0x;SEESIL */
940 sprintf(buf, "SIN-LIST: ");
941 p = buf + 10;
942 for (i = 0; i < 3; i++)
943 if (card->sil[ch - 1] & (1 << i))
944 p += sprintf(p, "%02d", bit2si[i]);
945 isdnloop_fake(card, buf, ch + 1);
946 break;
947 case 13:
948 /* 0x;SILC */
949 card->sil[ch - 1] = 0;
950 break;
951 case 14:
952 /* 00;FV2ON */
953 break;
954 case 15:
955 /* 00;FV2OFF */
956 break;
957 }
958 }
959
960 /*
961 * Put command-strings into the of the 'card'. In reality, execute them
962 * right in place by calling isdnloop_parse_cmd(). Also copy every
963 * command to the read message ringbuffer, preceeding it with a '>'.
964 * These mesagges can be read at /dev/isdnctrl.
965 *
966 * Parameter:
967 * buf = pointer to command buffer.
968 * len = length of buffer data.
969 * user = flag: 1 = called form userlevel, 0 called from kernel.
970 * card = pointer to card struct.
971 * Return:
972 * number of bytes transferred (currently always equals len).
973 */
974 static int
975 isdnloop_writecmd(const u_char * buf, int len, int user, isdnloop_card * card)
976 {
977 int xcount = 0;
978 int ocount = 1;
979 isdn_ctrl cmd;
980
981 while (len) {
982 int count = len;
983 u_char *p;
984 u_char msg[0x100];
985
986 if (count > 255)
987 count = 255;
988 if (user) {
989 if (copy_from_user(msg, buf, count))
990 return -EFAULT;
991 } else
992 memcpy(msg, buf, count);
993 isdnloop_putmsg(card, '>');
994 for (p = msg; count > 0; count--, p++) {
995 len--;
996 xcount++;
997 isdnloop_putmsg(card, *p);
998 card->omsg[card->optr] = *p;
999 if (*p == '\n') {
1000 card->omsg[card->optr] = '\0';
1001 card->optr = 0;
1002 isdnloop_parse_cmd(card);
1003 if (len) {
1004 isdnloop_putmsg(card, '>');
1005 ocount++;
1006 }
1007 } else {
1008 if (card->optr < 59)
1009 card->optr++;
1010 }
1011 ocount++;
1012 }
1013 }
1014 cmd.command = ISDN_STAT_STAVAIL;
1015 cmd.driver = card->myid;
1016 cmd.arg = ocount;
1017 card->interface.statcallb(&cmd);
1018 return xcount;
1019 }
1020
1021 /*
1022 * Delete card's pending timers, send STOP to linklevel
1023 */
1024 static void
1025 isdnloop_stopcard(isdnloop_card * card)
1026 {
1027 unsigned long flags;
1028 isdn_ctrl cmd;
1029
1030 save_flags(flags);
1031 cli();
1032 if (card->flags & ISDNLOOP_FLAGS_RUNNING) {
1033 card->flags &= ~ISDNLOOP_FLAGS_RUNNING;
1034 del_timer(&card->st_timer);
1035 del_timer(&card->rb_timer);
1036 del_timer(&card->c_timer[0]);
1037 del_timer(&card->c_timer[1]);
1038 cmd.command = ISDN_STAT_STOP;
1039 cmd.driver = card->myid;
1040 card->interface.statcallb(&cmd);
1041 }
1042 restore_flags(flags);
1043 }
1044
1045 /*
1046 * Stop all cards before unload.
1047 */
1048 static void
1049 isdnloop_stopallcards(void)
1050 {
1051 isdnloop_card *p = cards;
1052
1053 while (p) {
1054 isdnloop_stopcard(p);
1055 p = p->next;
1056 }
1057 }
1058
1059 /*
1060 * Start a 'card'. Simulate card's boot message and set the phone
1061 * number(s) of the virtual 'S0-Interface'. Install D-channel
1062 * poll timer.
1063 *
1064 * Parameter:
1065 * card = pointer to card struct.
1066 * sdefp = pointer to struct holding ioctl parameters.
1067 * Return:
1068 * 0 on success, -E??? otherwise.
1069 */
1070 static int
1071 isdnloop_start(isdnloop_card * card, isdnloop_sdef * sdefp)
1072 {
1073 unsigned long flags;
1074 isdnloop_sdef sdef;
1075 int i;
1076
1077 if (card->flags & ISDNLOOP_FLAGS_RUNNING)
1078 return -EBUSY;
1079 if (copy_from_user((char *) &sdef, (char *) sdefp, sizeof(sdef)))
1080 return -EFAULT;
1081 save_flags(flags);
1082 cli();
1083 switch (sdef.ptype) {
1084 case ISDN_PTYPE_EURO:
1085 if (isdnloop_fake(card, "DRV1.23EC-Q.931-CAPI-CNS-BASIS-20.02.96",
1086 -1)) {
1087 restore_flags(flags);
1088 return -ENOMEM;
1089 }
1090 card->sil[0] = card->sil[1] = 4;
1091 if (isdnloop_fake(card, "TEI OK", 0)) {
1092 restore_flags(flags);
1093 return -ENOMEM;
1094 }
1095 for (i = 0; i < 3; i++)
1096 strcpy(card->s0num[i], sdef.num[i]);
1097 break;
1098 case ISDN_PTYPE_1TR6:
1099 if (isdnloop_fake(card, "DRV1.04TC-1TR6-CAPI-CNS-BASIS-29.11.95",
1100 -1)) {
1101 restore_flags(flags);
1102 return -ENOMEM;
1103 }
1104 card->sil[0] = card->sil[1] = 4;
1105 if (isdnloop_fake(card, "TEI OK", 0)) {
1106 restore_flags(flags);
1107 return -ENOMEM;
1108 }
1109 strcpy(card->s0num[0], sdef.num[0]);
1110 card->s0num[1][0] = '\0';
1111 card->s0num[2][0] = '\0';
1112 break;
1113 default:
1114 restore_flags(flags);
1115 printk(KERN_WARNING "isdnloop: Illegal D-channel protocol %d\n",
1116 sdef.ptype);
1117 return -EINVAL;
1118 }
1119 init_timer(&card->st_timer);
1120 card->st_timer.expires = jiffies + ISDNLOOP_TIMER_DCREAD;
1121 card->st_timer.function = isdnloop_polldchan;
1122 card->st_timer.data = (unsigned long) card;
1123 add_timer(&card->st_timer);
1124 card->flags |= ISDNLOOP_FLAGS_RUNNING;
1125 restore_flags(flags);
1126 return 0;
1127 }
1128
1129 /*
1130 * Main handler for commands sent by linklevel.
1131 */
1132 static int
1133 isdnloop_command(isdn_ctrl * c, isdnloop_card * card)
1134 {
1135 ulong a;
1136 int i;
1137 char cbuf[60];
1138 isdn_ctrl cmd;
1139 isdnloop_cdef cdef;
1140
1141 switch (c->command) {
1142 case ISDN_CMD_IOCTL:
1143 memcpy(&a, c->parm.num, sizeof(ulong));
1144 switch (c->arg) {
1145 case ISDNLOOP_IOCTL_DEBUGVAR:
1146 return (ulong) card;
1147 case ISDNLOOP_IOCTL_STARTUP:
1148 if ((i = verify_area(VERIFY_READ, (void *) a, sizeof(isdnloop_sdef))))
1149 return i;
1150 return (isdnloop_start(card, (isdnloop_sdef *) a));
1151 break;
1152 case ISDNLOOP_IOCTL_ADDCARD:
1153 if (copy_from_user((char *)&cdef,
1154 (char *)a,
1155 sizeof(cdef)))
1156 return -EFAULT;
1157 return (isdnloop_addcard(cdef.id1));
1158 break;
1159 case ISDNLOOP_IOCTL_LEASEDCFG:
1160 if (a) {
1161 if (!card->leased) {
1162 card->leased = 1;
1163 while (card->ptype == ISDN_PTYPE_UNKNOWN) {
1164 schedule_timeout(10);
1165 }
1166 schedule_timeout(10);
1167 sprintf(cbuf, "00;FV2ON\n01;EAZ1\n02;EAZ2\n");
1168 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1169 printk(KERN_INFO
1170 "isdnloop: (%s) Leased-line mode enabled\n",
1171 CID);
1172 cmd.command = ISDN_STAT_RUN;
1173 cmd.driver = card->myid;
1174 cmd.arg = 0;
1175 card->interface.statcallb(&cmd);
1176 }
1177 } else {
1178 if (card->leased) {
1179 card->leased = 0;
1180 sprintf(cbuf, "00;FV2OFF\n");
1181 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1182 printk(KERN_INFO
1183 "isdnloop: (%s) Leased-line mode disabled\n",
1184 CID);
1185 cmd.command = ISDN_STAT_RUN;
1186 cmd.driver = card->myid;
1187 cmd.arg = 0;
1188 card->interface.statcallb(&cmd);
1189 }
1190 }
1191 return 0;
1192 default:
1193 return -EINVAL;
1194 }
1195 break;
1196 case ISDN_CMD_DIAL:
1197 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1198 return -ENODEV;
1199 if (card->leased)
1200 break;
1201 if ((c->arg & 255) < ISDNLOOP_BCH) {
1202 char *p;
1203 char dial[50];
1204 char dcode[4];
1205
1206 a = c->arg;
1207 p = c->parm.setup.phone;
1208 if (*p == 's' || *p == 'S') {
1209 /* Dial for SPV */
1210 p++;
1211 strcpy(dcode, "SCA");
1212 } else
1213 /* Normal Dial */
1214 strcpy(dcode, "CAL");
1215 strcpy(dial, p);
1216 sprintf(cbuf, "%02d;D%s_R%s,%02d,%02d,%s\n", (int) (a + 1),
1217 dcode, dial, c->parm.setup.si1,
1218 c->parm.setup.si2, c->parm.setup.eazmsn);
1219 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1220 }
1221 break;
1222 case ISDN_CMD_ACCEPTD:
1223 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1224 return -ENODEV;
1225 if (c->arg < ISDNLOOP_BCH) {
1226 a = c->arg + 1;
1227 cbuf[0] = 0;
1228 switch (card->l2_proto[a - 1]) {
1229 case ISDN_PROTO_L2_X75I:
1230 sprintf(cbuf, "%02d;BX75\n", (int) a);
1231 break;
1232 #ifdef CONFIG_ISDN_X25
1233 case ISDN_PROTO_L2_X25DTE:
1234 sprintf(cbuf, "%02d;BX2T\n", (int) a);
1235 break;
1236 case ISDN_PROTO_L2_X25DCE:
1237 sprintf(cbuf, "%02d;BX2C\n", (int) a);
1238 break;
1239 #endif
1240 case ISDN_PROTO_L2_HDLC:
1241 sprintf(cbuf, "%02d;BTRA\n", (int) a);
1242 break;
1243 }
1244 if (strlen(cbuf))
1245 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1246 sprintf(cbuf, "%02d;DCON_R\n", (int) a);
1247 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1248 }
1249 break;
1250 case ISDN_CMD_ACCEPTB:
1251 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1252 return -ENODEV;
1253 if (c->arg < ISDNLOOP_BCH) {
1254 a = c->arg + 1;
1255 switch (card->l2_proto[a - 1]) {
1256 case ISDN_PROTO_L2_X75I:
1257 sprintf(cbuf, "%02d;BCON_R,BX75\n", (int) a);
1258 break;
1259 #ifdef CONFIG_ISDN_X25
1260 case ISDN_PROTO_L2_X25DTE:
1261 sprintf(cbuf, "%02d;BCON_R,BX2T\n", (int) a);
1262 break;
1263 case ISDN_PROTO_L2_X25DCE:
1264 sprintf(cbuf, "%02d;BCON_R,BX2C\n", (int) a);
1265 break;
1266 #endif
1267 case ISDN_PROTO_L2_HDLC:
1268 sprintf(cbuf, "%02d;BCON_R,BTRA\n", (int) a);
1269 break;
1270 default:
1271 sprintf(cbuf, "%02d;BCON_R\n", (int) a);
1272 }
1273 printk(KERN_DEBUG "isdnloop writecmd '%s'\n", cbuf);
1274 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1275 break;
1276 case ISDN_CMD_HANGUP:
1277 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1278 return -ENODEV;
1279 if (c->arg < ISDNLOOP_BCH) {
1280 a = c->arg + 1;
1281 sprintf(cbuf, "%02d;BDIS_R\n%02d;DDIS_R\n", (int) a, (int) a);
1282 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1283 }
1284 break;
1285 case ISDN_CMD_SETEAZ:
1286 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1287 return -ENODEV;
1288 if (card->leased)
1289 break;
1290 if (c->arg < ISDNLOOP_BCH) {
1291 a = c->arg + 1;
1292 if (card->ptype == ISDN_PTYPE_EURO) {
1293 sprintf(cbuf, "%02d;MS%s%s\n", (int) a,
1294 c->parm.num[0] ? "N" : "ALL", c->parm.num);
1295 } else
1296 sprintf(cbuf, "%02d;EAZ%s\n", (int) a,
1297 c->parm.num[0] ? c->parm.num : (u_char *) "0123456789");
1298 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1299 }
1300 break;
1301 case ISDN_CMD_CLREAZ:
1302 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1303 return -ENODEV;
1304 if (card->leased)
1305 break;
1306 if (c->arg < ISDNLOOP_BCH) {
1307 a = c->arg + 1;
1308 if (card->ptype == ISDN_PTYPE_EURO)
1309 sprintf(cbuf, "%02d;MSNC\n", (int) a);
1310 else
1311 sprintf(cbuf, "%02d;EAZC\n", (int) a);
1312 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1313 }
1314 break;
1315 case ISDN_CMD_SETL2:
1316 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1317 return -ENODEV;
1318 if ((c->arg & 255) < ISDNLOOP_BCH) {
1319 a = c->arg;
1320 switch (a >> 8) {
1321 case ISDN_PROTO_L2_X75I:
1322 sprintf(cbuf, "%02d;BX75\n", (int) (a & 255) + 1);
1323 break;
1324 #ifdef CONFIG_ISDN_X25
1325 case ISDN_PROTO_L2_X25DTE:
1326 sprintf(cbuf, "%02d;BX2T\n", (int) (a & 255) + 1);
1327 break;
1328 case ISDN_PROTO_L2_X25DCE:
1329 sprintf(cbuf, "%02d;BX2C\n", (int) (a & 255) + 1);
1330 break;
1331 #endif
1332 case ISDN_PROTO_L2_HDLC:
1333 sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
1334 break;
1335 case ISDN_PROTO_L2_TRANS:
1336 sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
1337 break;
1338 default:
1339 return -EINVAL;
1340 }
1341 i = isdnloop_writecmd(cbuf, strlen(cbuf), 0, card);
1342 card->l2_proto[a & 255] = (a >> 8);
1343 }
1344 break;
1345 case ISDN_CMD_SETL3:
1346 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1347 return -ENODEV;
1348 return 0;
1349 default:
1350 return -EINVAL;
1351 }
1352 }
1353 return 0;
1354 }
1355
1356 /*
1357 * Find card with given driverId
1358 */
1359 static inline isdnloop_card *
1360 isdnloop_findcard(int driverid)
1361 {
1362 isdnloop_card *p = cards;
1363
1364 while (p) {
1365 if (p->myid == driverid)
1366 return p;
1367 p = p->next;
1368 }
1369 return (isdnloop_card *) 0;
1370 }
1371
1372 /*
1373 * Wrapper functions for interface to linklevel
1374 */
1375 static int
1376 if_command(isdn_ctrl * c)
1377 {
1378 isdnloop_card *card = isdnloop_findcard(c->driver);
1379
1380 if (card)
1381 return (isdnloop_command(c, card));
1382 printk(KERN_ERR
1383 "isdnloop: if_command called with invalid driverId!\n");
1384 return -ENODEV;
1385 }
1386
1387 static int
1388 if_writecmd(const u_char __user *buf, int len, int id, int channel)
1389 {
1390 isdnloop_card *card = isdnloop_findcard(id);
1391
1392 if (card) {
1393 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1394 return -ENODEV;
1395 return (isdnloop_writecmd(buf, len, 1, card));
1396 }
1397 printk(KERN_ERR
1398 "isdnloop: if_writecmd called with invalid driverId!\n");
1399 return -ENODEV;
1400 }
1401
1402 static int
1403 if_readstatus(u_char __user *buf, int len, int id, int channel)
1404 {
1405 isdnloop_card *card = isdnloop_findcard(id);
1406
1407 if (card) {
1408 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1409 return -ENODEV;
1410 return (isdnloop_readstatus(buf, len, card));
1411 }
1412 printk(KERN_ERR
1413 "isdnloop: if_readstatus called with invalid driverId!\n");
1414 return -ENODEV;
1415 }
1416
1417 static int
1418 if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
1419 {
1420 isdnloop_card *card = isdnloop_findcard(id);
1421
1422 if (card) {
1423 if (!card->flags & ISDNLOOP_FLAGS_RUNNING)
1424 return -ENODEV;
1425 /* ack request stored in skb scratch area */
1426 *(skb->head) = ack;
1427 return (isdnloop_sendbuf(channel, skb, card));
1428 }
1429 printk(KERN_ERR
1430 "isdnloop: if_sendbuf called with invalid driverId!\n");
1431 return -ENODEV;
1432 }
1433
1434 /*
1435 * Allocate a new card-struct, initialize it
1436 * link it into cards-list and register it at linklevel.
1437 */
1438 static isdnloop_card *
1439 isdnloop_initcard(char *id)
1440 {
1441 isdnloop_card *card;
1442 int i;
1443
1444 if (!(card = (isdnloop_card *) kmalloc(sizeof(isdnloop_card), GFP_KERNEL))) {
1445 printk(KERN_WARNING
1446 "isdnloop: (%s) Could not allocate card-struct.\n", id);
1447 return (isdnloop_card *) 0;
1448 }
1449 memset((char *) card, 0, sizeof(isdnloop_card));
1450 card->interface.owner = THIS_MODULE;
1451 card->interface.channels = ISDNLOOP_BCH;
1452 card->interface.hl_hdrlen = 1; /* scratch area for storing ack flag*/
1453 card->interface.maxbufsize = 4000;
1454 card->interface.command = if_command;
1455 card->interface.writebuf_skb = if_sendbuf;
1456 card->interface.writecmd = if_writecmd;
1457 card->interface.readstat = if_readstatus;
1458 card->interface.features = ISDN_FEATURE_L2_X75I |
1459 #ifdef CONFIG_ISDN_X25
1460 ISDN_FEATURE_L2_X25DTE |
1461 ISDN_FEATURE_L2_X25DCE |
1462 #endif
1463 ISDN_FEATURE_L2_HDLC |
1464 ISDN_FEATURE_L3_TRANS |
1465 ISDN_FEATURE_P_UNKNOWN;
1466 card->ptype = ISDN_PTYPE_UNKNOWN;
1467 strlcpy(card->interface.id, id, sizeof(card->interface.id));
1468 card->msg_buf_write = card->msg_buf;
1469 card->msg_buf_read = card->msg_buf;
1470 card->msg_buf_end = &card->msg_buf[sizeof(card->msg_buf) - 1];
1471 for (i = 0; i < ISDNLOOP_BCH; i++) {
1472 card->l2_proto[i] = ISDN_PROTO_L2_X75I;
1473 skb_queue_head_init(&card->bqueue[i]);
1474 }
1475 skb_queue_head_init(&card->dqueue);
1476 card->next = cards;
1477 cards = card;
1478 if (!register_isdn(&card->interface)) {
1479 cards = cards->next;
1480 printk(KERN_WARNING
1481 "isdnloop: Unable to register %s\n", id);
1482 kfree(card);
1483 return (isdnloop_card *) 0;
1484 }
1485 card->myid = card->interface.channels;
1486 return card;
1487 }
1488
1489 static int
1490 isdnloop_addcard(char *id1)
1491 {
1492 isdnloop_card *card;
1493
1494 if (!(card = isdnloop_initcard(id1))) {
1495 return -EIO;
1496 }
1497 printk(KERN_INFO
1498 "isdnloop: (%s) virtual card added\n",
1499 card->interface.id);
1500 return 0;
1501 }
1502
1503 static int __init
1504 isdnloop_init(void)
1505 {
1506 char *p;
1507 char rev[10];
1508
1509 if ((p = strchr(revision, ':'))) {
1510 strcpy(rev, p + 1);
1511 p = strchr(rev, '$');
1512 *p = 0;
1513 } else
1514 strcpy(rev, " ??? ");
1515 printk(KERN_NOTICE "isdnloop-ISDN-driver Rev%s\n", rev);
1516
1517 if (isdnloop_id)
1518 return (isdnloop_addcard(isdnloop_id));
1519
1520 return 0;
1521 }
1522
1523 static void __exit
1524 isdnloop_exit(void)
1525 {
1526 isdn_ctrl cmd;
1527 isdnloop_card *card = cards;
1528 isdnloop_card *last;
1529 int i;
1530
1531 isdnloop_stopallcards();
1532 while (card) {
1533 cmd.command = ISDN_STAT_UNLOAD;
1534 cmd.driver = card->myid;
1535 card->interface.statcallb(&cmd);
1536 for (i = 0; i < ISDNLOOP_BCH; i++)
1537 isdnloop_free_queue(card, i);
1538 card = card->next;
1539 }
1540 card = cards;
1541 while (card) {
1542 last = card;
1543 skb_queue_purge(&card->dqueue);
1544 card = card->next;
1545 kfree(last);
1546 }
1547 printk(KERN_NOTICE "isdnloop-ISDN-driver unloaded\n");
1548 }
1549
1550 module_init(isdnloop_init);
1551 module_exit(isdnloop_exit);
MOXA 2.6.9 from sdlinux-moxaart.tgz