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gerrit-public.fairphone.software / kernel / msm-4.19 / 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 / . / drivers / isdn / hisax / l3dss1.c
blob: ec92308c1efc75138b22646be00ea4dc811f948c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame^]1/* $Id: l3dss1.c,v 2.32.2.3 2004/01/13 14:31:25 keil Exp $
2 *
3 * EURO/DSS1 D-channel protocol
4 *
5 * German 1TR6 D-channel protocol
6 *
7 * Author Karsten Keil
8 * based on the teles driver from Jan den Ouden
9 * Copyright by Karsten Keil <keil@isdn4linux.de>
10 *
11 * This software may be used and distributed according to the terms
12 * of the GNU General Public License, incorporated herein by reference.
13 *
14 * For changes and modifications please read
15 * Documentation/isdn/HiSax.cert
16 *
17 * Thanks to Jan den Ouden
18 * Fritz Elfert
19 *
20 */
21
22#include "hisax.h"
23#include "isdnl3.h"
24#include "l3dss1.h"
25#include <linux/ctype.h>
26#include <linux/config.h>
27
28extern char *HiSax_getrev(const char *revision);
29const char *dss1_revision = "$Revision: 2.32.2.3 $";
30
31#define EXT_BEARER_CAPS 1
32
33#define MsgHead(ptr, cref, mty) \
34 *ptr++ = 0x8; \
35 if (cref == -1) { \
36 *ptr++ = 0x0; \
37 } else { \
38 *ptr++ = 0x1; \
39 *ptr++ = cref^0x80; \
40 } \
41 *ptr++ = mty
42
43
44/**********************************************/
45/* get a new invoke id for remote operations. */
46/* Only a return value != 0 is valid */
47/**********************************************/
48static unsigned char new_invoke_id(struct PStack *p)
49{
50 unsigned char retval;
51 int i;
52
53 i = 32; /* maximum search depth */
54
55 retval = p->prot.dss1.last_invoke_id + 1; /* try new id */
56 while ((i) && (p->prot.dss1.invoke_used[retval >> 3] == 0xFF)) {
57 p->prot.dss1.last_invoke_id = (retval & 0xF8) + 8;
58 i--;
59 }
60 if (i) {
61 while (p->prot.dss1.invoke_used[retval >> 3] & (1 << (retval & 7)))
62 retval++;
63 } else
64 retval = 0;
65 p->prot.dss1.last_invoke_id = retval;
66 p->prot.dss1.invoke_used[retval >> 3] |= (1 << (retval & 7));
67 return(retval);
68} /* new_invoke_id */
69
70/*************************/
71/* free a used invoke id */
72/*************************/
73static void free_invoke_id(struct PStack *p, unsigned char id)
74{
75
76 if (!id) return; /* 0 = invalid value */
77
78 p->prot.dss1.invoke_used[id >> 3] &= ~(1 << (id & 7));
79} /* free_invoke_id */
80
81
82/**********************************************************/
83/* create a new l3 process and fill in dss1 specific data */
84/**********************************************************/
85static struct l3_process
86*dss1_new_l3_process(struct PStack *st, int cr)
87{ struct l3_process *proc;
88
89 if (!(proc = new_l3_process(st, cr)))
90 return(NULL);
91
92 proc->prot.dss1.invoke_id = 0;
93 proc->prot.dss1.remote_operation = 0;
94 proc->prot.dss1.uus1_data[0] = '\0';
95
96 return(proc);
97} /* dss1_new_l3_process */
98
99/************************************************/
100/* free a l3 process and all dss1 specific data */
101/************************************************/
102static void
103dss1_release_l3_process(struct l3_process *p)
104{
105 free_invoke_id(p->st,p->prot.dss1.invoke_id);
106 release_l3_process(p);
107} /* dss1_release_l3_process */
108
109/********************************************************/
110/* search a process with invoke id id and dummy callref */
111/********************************************************/
112static struct l3_process *
113l3dss1_search_dummy_proc(struct PStack *st, int id)
114{ struct l3_process *pc = st->l3.proc; /* start of processes */
115
116 if (!id) return(NULL);
117
118 while (pc)
119 { if ((pc->callref == -1) && (pc->prot.dss1.invoke_id == id))
120 return(pc);
121 pc = pc->next;
122 }
123 return(NULL);
124} /* l3dss1_search_dummy_proc */
125
126/*******************************************************************/
127/* called when a facility message with a dummy callref is received */
128/* and a return result is delivered. id specifies the invoke id. */
129/*******************************************************************/
130static void
131l3dss1_dummy_return_result(struct PStack *st, int id, u_char *p, u_char nlen)
132{ isdn_ctrl ic;
133 struct IsdnCardState *cs;
134 struct l3_process *pc = NULL;
135
136 if ((pc = l3dss1_search_dummy_proc(st, id)))
137 { L3DelTimer(&pc->timer); /* remove timer */
138
139 cs = pc->st->l1.hardware;
140 ic.driver = cs->myid;
141 ic.command = ISDN_STAT_PROT;
142 ic.arg = DSS1_STAT_INVOKE_RES;
143 ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
144 ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
145 ic.parm.dss1_io.proc = pc->prot.dss1.proc;
146 ic.parm.dss1_io.timeout= 0;
147 ic.parm.dss1_io.datalen = nlen;
148 ic.parm.dss1_io.data = p;
149 free_invoke_id(pc->st, pc->prot.dss1.invoke_id);
150 pc->prot.dss1.invoke_id = 0; /* reset id */
151
152 cs->iif.statcallb(&ic);
153 dss1_release_l3_process(pc);
154 }
155 else
156 l3_debug(st, "dummy return result id=0x%x result len=%d",id,nlen);
157} /* l3dss1_dummy_return_result */
158
159/*******************************************************************/
160/* called when a facility message with a dummy callref is received */
161/* and a return error is delivered. id specifies the invoke id. */
162/*******************************************************************/
163static void
164l3dss1_dummy_error_return(struct PStack *st, int id, ulong error)
165{ isdn_ctrl ic;
166 struct IsdnCardState *cs;
167 struct l3_process *pc = NULL;
168
169 if ((pc = l3dss1_search_dummy_proc(st, id)))
170 { L3DelTimer(&pc->timer); /* remove timer */
171
172 cs = pc->st->l1.hardware;
173 ic.driver = cs->myid;
174 ic.command = ISDN_STAT_PROT;
175 ic.arg = DSS1_STAT_INVOKE_ERR;
176 ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
177 ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
178 ic.parm.dss1_io.proc = pc->prot.dss1.proc;
179 ic.parm.dss1_io.timeout= error;
180 ic.parm.dss1_io.datalen = 0;
181 ic.parm.dss1_io.data = NULL;
182 free_invoke_id(pc->st, pc->prot.dss1.invoke_id);
183 pc->prot.dss1.invoke_id = 0; /* reset id */
184
185 cs->iif.statcallb(&ic);
186 dss1_release_l3_process(pc);
187 }
188 else
189 l3_debug(st, "dummy return error id=0x%x error=0x%lx",id,error);
190} /* l3dss1_error_return */
191
192/*******************************************************************/
193/* called when a facility message with a dummy callref is received */
194/* and a invoke is delivered. id specifies the invoke id. */
195/*******************************************************************/
196static void
197l3dss1_dummy_invoke(struct PStack *st, int cr, int id,
198 int ident, u_char *p, u_char nlen)
199{ isdn_ctrl ic;
200 struct IsdnCardState *cs;
201
202 l3_debug(st, "dummy invoke %s id=0x%x ident=0x%x datalen=%d",
203 (cr == -1) ? "local" : "broadcast",id,ident,nlen);
204 if (cr >= -1) return; /* ignore local data */
205
206 cs = st->l1.hardware;
207 ic.driver = cs->myid;
208 ic.command = ISDN_STAT_PROT;
209 ic.arg = DSS1_STAT_INVOKE_BRD;
210 ic.parm.dss1_io.hl_id = id;
211 ic.parm.dss1_io.ll_id = 0;
212 ic.parm.dss1_io.proc = ident;
213 ic.parm.dss1_io.timeout= 0;
214 ic.parm.dss1_io.datalen = nlen;
215 ic.parm.dss1_io.data = p;
216
217 cs->iif.statcallb(&ic);
218} /* l3dss1_dummy_invoke */
219
220static void
221l3dss1_parse_facility(struct PStack *st, struct l3_process *pc,
222 int cr, u_char * p)
223{
224 int qd_len = 0;
225 unsigned char nlen = 0, ilen, cp_tag;
226 int ident, id;
227 ulong err_ret;
228
229 if (pc)
230 st = pc->st; /* valid Stack */
231 else
232 if ((!st) || (cr >= 0)) return; /* neither pc nor st specified */
233
234 p++;
235 qd_len = *p++;
236 if (qd_len == 0) {
237 l3_debug(st, "qd_len == 0");
238 return;
239 }
240 if ((*p & 0x1F) != 0x11) { /* Service discriminator, supplementary service */
241 l3_debug(st, "supplementary service != 0x11");
242 return;
243 }
244 while (qd_len > 0 && !(*p & 0x80)) { /* extension ? */
245 p++;
246 qd_len--;
247 }
248 if (qd_len < 2) {
249 l3_debug(st, "qd_len < 2");
250 return;
251 }
252 p++;
253 qd_len--;
254 if ((*p & 0xE0) != 0xA0) { /* class and form */
255 l3_debug(st, "class and form != 0xA0");
256 return;
257 }
258
259 cp_tag = *p & 0x1F; /* remember tag value */
260
261 p++;
262 qd_len--;
263 if (qd_len < 1)
264 { l3_debug(st, "qd_len < 1");
265 return;
266 }
267 if (*p & 0x80)
268 { /* length format indefinite or limited */
269 nlen = *p++ & 0x7F; /* number of len bytes or indefinite */
270 if ((qd_len-- < ((!nlen) ? 3 : (1 + nlen))) ||
271 (nlen > 1))
272 { l3_debug(st, "length format error or not implemented");
273 return;
274 }
275 if (nlen == 1)
276 { nlen = *p++; /* complete length */
277 qd_len--;
278 }
279 else
280 { qd_len -= 2; /* trailing null bytes */
281 if ((*(p+qd_len)) || (*(p+qd_len+1)))
282 { l3_debug(st,"length format indefinite error");
283 return;
284 }
285 nlen = qd_len;
286 }
287 }
288 else
289 { nlen = *p++;
290 qd_len--;
291 }
292 if (qd_len < nlen)
293 { l3_debug(st, "qd_len < nlen");
294 return;
295 }
296 qd_len -= nlen;
297
298 if (nlen < 2)
299 { l3_debug(st, "nlen < 2");
300 return;
301 }
302 if (*p != 0x02)
303 { /* invoke identifier tag */
304 l3_debug(st, "invoke identifier tag !=0x02");
305 return;
306 }
307 p++;
308 nlen--;
309 if (*p & 0x80)
310 { /* length format */
311 l3_debug(st, "invoke id length format 2");
312 return;
313 }
314 ilen = *p++;
315 nlen--;
316 if (ilen > nlen || ilen == 0)
317 { l3_debug(st, "ilen > nlen || ilen == 0");
318 return;
319 }
320 nlen -= ilen;
321 id = 0;
322 while (ilen > 0)
323 { id = (id << 8) | (*p++ & 0xFF); /* invoke identifier */
324 ilen--;
325 }
326
327 switch (cp_tag) { /* component tag */
328 case 1: /* invoke */
329 if (nlen < 2) {
330 l3_debug(st, "nlen < 2 22");
331 return;
332 }
333 if (*p != 0x02) { /* operation value */
334 l3_debug(st, "operation value !=0x02");
335 return;
336 }
337 p++;
338 nlen--;
339 ilen = *p++;
340 nlen--;
341 if (ilen > nlen || ilen == 0) {
342 l3_debug(st, "ilen > nlen || ilen == 0 22");
343 return;
344 }
345 nlen -= ilen;
346 ident = 0;
347 while (ilen > 0) {
348 ident = (ident << 8) | (*p++ & 0xFF);
349 ilen--;
350 }
351
352 if (!pc)
353 { l3dss1_dummy_invoke(st, cr, id, ident, p, nlen);
354 return;
355 }
356#if HISAX_DE_AOC
357 {
358
359#define FOO1(s,a,b) \
360 while(nlen > 1) { \
361 int ilen = p[1]; \
362 if(nlen < ilen+2) { \
363 l3_debug(st, "FOO1 nlen < ilen+2"); \
364 return; \
365 } \
366 nlen -= ilen+2; \
367 if((*p & 0xFF) == (a)) { \
368 int nlen = ilen; \
369 p += 2; \
370 b; \
371 } else { \
372 p += ilen+2; \
373 } \
374 }
375
376 switch (ident) {
377 case 0x22: /* during */
378 FOO1("1A", 0x30, FOO1("1C", 0xA1, FOO1("1D", 0x30, FOO1("1E", 0x02, ( {
379 ident = 0;
380 nlen = (nlen)?nlen:0; /* Make gcc happy */
381 while (ilen > 0) {
382 ident = (ident << 8) | *p++;
383 ilen--;
384 }
385 if (ident > pc->para.chargeinfo) {
386 pc->para.chargeinfo = ident;
387 st->l3.l3l4(st, CC_CHARGE | INDICATION, pc);
388 }
389 if (st->l3.debug & L3_DEB_CHARGE) {
390 if (*(p + 2) == 0) {
391 l3_debug(st, "charging info during %d", pc->para.chargeinfo);
392 }
393 else {
394 l3_debug(st, "charging info final %d", pc->para.chargeinfo);
395 }
396 }
397 }
398 )))))
399 break;
400 case 0x24: /* final */
401 FOO1("2A", 0x30, FOO1("2B", 0x30, FOO1("2C", 0xA1, FOO1("2D", 0x30, FOO1("2E", 0x02, ( {
402 ident = 0;
403 nlen = (nlen)?nlen:0; /* Make gcc happy */
404 while (ilen > 0) {
405 ident = (ident << 8) | *p++;
406 ilen--;
407 }
408 if (ident > pc->para.chargeinfo) {
409 pc->para.chargeinfo = ident;
410 st->l3.l3l4(st, CC_CHARGE | INDICATION, pc);
411 }
412 if (st->l3.debug & L3_DEB_CHARGE) {
413 l3_debug(st, "charging info final %d", pc->para.chargeinfo);
414 }
415 }
416 ))))))
417 break;
418 default:
419 l3_debug(st, "invoke break invalid ident %02x",ident);
420 break;
421 }
422#undef FOO1
423
424 }
425#else /* not HISAX_DE_AOC */
426 l3_debug(st, "invoke break");
427#endif /* not HISAX_DE_AOC */
428 break;
429 case 2: /* return result */
430 /* if no process available handle separately */
431 if (!pc)
432 { if (cr == -1)
433 l3dss1_dummy_return_result(st, id, p, nlen);
434 return;
435 }
436 if ((pc->prot.dss1.invoke_id) && (pc->prot.dss1.invoke_id == id))
437 { /* Diversion successful */
438 free_invoke_id(st,pc->prot.dss1.invoke_id);
439 pc->prot.dss1.remote_result = 0; /* success */
440 pc->prot.dss1.invoke_id = 0;
441 pc->redir_result = pc->prot.dss1.remote_result;
442 st->l3.l3l4(st, CC_REDIR | INDICATION, pc); } /* Diversion successful */
443 else
444 l3_debug(st,"return error unknown identifier");
445 break;
446 case 3: /* return error */
447 err_ret = 0;
448 if (nlen < 2)
449 { l3_debug(st, "return error nlen < 2");
450 return;
451 }
452 if (*p != 0x02)
453 { /* result tag */
454 l3_debug(st, "invoke error tag !=0x02");
455 return;
456 }
457 p++;
458 nlen--;
459 if (*p > 4)
460 { /* length format */
461 l3_debug(st, "invoke return errlen > 4 ");
462 return;
463 }
464 ilen = *p++;
465 nlen--;
466 if (ilen > nlen || ilen == 0)
467 { l3_debug(st, "error return ilen > nlen || ilen == 0");
468 return;
469 }
470 nlen -= ilen;
471 while (ilen > 0)
472 { err_ret = (err_ret << 8) | (*p++ & 0xFF); /* error value */
473 ilen--;
474 }
475 /* if no process available handle separately */
476 if (!pc)
477 { if (cr == -1)
478 l3dss1_dummy_error_return(st, id, err_ret);
479 return;
480 }
481 if ((pc->prot.dss1.invoke_id) && (pc->prot.dss1.invoke_id == id))
482 { /* Deflection error */
483 free_invoke_id(st,pc->prot.dss1.invoke_id);
484 pc->prot.dss1.remote_result = err_ret; /* result */
485 pc->prot.dss1.invoke_id = 0;
486 pc->redir_result = pc->prot.dss1.remote_result;
487 st->l3.l3l4(st, CC_REDIR | INDICATION, pc);
488 } /* Deflection error */
489 else
490 l3_debug(st,"return result unknown identifier");
491 break;
492 default:
493 l3_debug(st, "facility default break tag=0x%02x",cp_tag);
494 break;
495 }
496}
497
498static void
499l3dss1_message(struct l3_process *pc, u_char mt)
500{
501 struct sk_buff *skb;
502 u_char *p;
503
504 if (!(skb = l3_alloc_skb(4)))
505 return;
506 p = skb_put(skb, 4);
507 MsgHead(p, pc->callref, mt);
508 l3_msg(pc->st, DL_DATA | REQUEST, skb);
509}
510
511static void
512l3dss1_message_cause(struct l3_process *pc, u_char mt, u_char cause)
513{
514 struct sk_buff *skb;
515 u_char tmp[16];
516 u_char *p = tmp;
517 int l;
518
519 MsgHead(p, pc->callref, mt);
520 *p++ = IE_CAUSE;
521 *p++ = 0x2;
522 *p++ = 0x80;
523 *p++ = cause | 0x80;
524
525 l = p - tmp;
526 if (!(skb = l3_alloc_skb(l)))
527 return;
528 memcpy(skb_put(skb, l), tmp, l);
529 l3_msg(pc->st, DL_DATA | REQUEST, skb);
530}
531
532static void
533l3dss1_status_send(struct l3_process *pc, u_char pr, void *arg)
534{
535 u_char tmp[16];
536 u_char *p = tmp;
537 int l;
538 struct sk_buff *skb;
539
540 MsgHead(p, pc->callref, MT_STATUS);
541
542 *p++ = IE_CAUSE;
543 *p++ = 0x2;
544 *p++ = 0x80;
545 *p++ = pc->para.cause | 0x80;
546
547 *p++ = IE_CALL_STATE;
548 *p++ = 0x1;
549 *p++ = pc->state & 0x3f;
550
551 l = p - tmp;
552 if (!(skb = l3_alloc_skb(l)))
553 return;
554 memcpy(skb_put(skb, l), tmp, l);
555 l3_msg(pc->st, DL_DATA | REQUEST, skb);
556}
557
558static void
559l3dss1_msg_without_setup(struct l3_process *pc, u_char pr, void *arg)
560{
561 /* This routine is called if here was no SETUP made (checks in dss1up and in
562 * l3dss1_setup) and a RELEASE_COMPLETE have to be sent with an error code
563 * MT_STATUS_ENQUIRE in the NULL state is handled too
564 */
565 u_char tmp[16];
566 u_char *p = tmp;
567 int l;
568 struct sk_buff *skb;
569
570 switch (pc->para.cause) {
571 case 81: /* invalid callreference */
572 case 88: /* incomp destination */
573 case 96: /* mandory IE missing */
574 case 100: /* invalid IE contents */
575 case 101: /* incompatible Callstate */
576 MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
577 *p++ = IE_CAUSE;
578 *p++ = 0x2;
579 *p++ = 0x80;
580 *p++ = pc->para.cause | 0x80;
581 break;
582 default:
583 printk(KERN_ERR "HiSax l3dss1_msg_without_setup wrong cause %d\n",
584 pc->para.cause);
585 return;
586 }
587 l = p - tmp;
588 if (!(skb = l3_alloc_skb(l)))
589 return;
590 memcpy(skb_put(skb, l), tmp, l);
591 l3_msg(pc->st, DL_DATA | REQUEST, skb);
592 dss1_release_l3_process(pc);
593}
594
595static int ie_ALERTING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
596 IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_HLC,
597 IE_USER_USER, -1};
598static int ie_CALL_PROCEEDING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
599 IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_HLC, -1};
600static int ie_CONNECT[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1,
601 IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_DATE, IE_SIGNAL,
602 IE_CONNECT_PN, IE_CONNECT_SUB, IE_LLC, IE_HLC, IE_USER_USER, -1};
603static int ie_CONNECT_ACKNOWLEDGE[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_SIGNAL, -1};
604static int ie_DISCONNECT[] = {IE_CAUSE | IE_MANDATORY, IE_FACILITY,
605 IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1};
606static int ie_INFORMATION[] = {IE_COMPLETE, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL,
607 IE_CALLED_PN, -1};
608static int ie_NOTIFY[] = {IE_BEARER, IE_NOTIFY | IE_MANDATORY, IE_DISPLAY, -1};
609static int ie_PROGRESS[] = {IE_BEARER, IE_CAUSE, IE_FACILITY, IE_PROGRESS |
610 IE_MANDATORY, IE_DISPLAY, IE_HLC, IE_USER_USER, -1};
611static int ie_RELEASE[] = {IE_CAUSE | IE_MANDATORY_1, IE_FACILITY, IE_DISPLAY,
612 IE_SIGNAL, IE_USER_USER, -1};
613/* a RELEASE_COMPLETE with errors don't require special actions
614static int ie_RELEASE_COMPLETE[] = {IE_CAUSE | IE_MANDATORY_1, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1};
615*/
616static int ie_RESUME_ACKNOWLEDGE[] = {IE_CHANNEL_ID| IE_MANDATORY, IE_FACILITY,
617 IE_DISPLAY, -1};
618static int ie_RESUME_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
619static int ie_SETUP[] = {IE_COMPLETE, IE_BEARER | IE_MANDATORY,
620 IE_CHANNEL_ID| IE_MANDATORY, IE_FACILITY, IE_PROGRESS,
621 IE_NET_FAC, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL, IE_CALLING_PN,
622 IE_CALLING_SUB, IE_CALLED_PN, IE_CALLED_SUB, IE_REDIR_NR,
623 IE_LLC, IE_HLC, IE_USER_USER, -1};
624static int ie_SETUP_ACKNOWLEDGE[] = {IE_CHANNEL_ID | IE_MANDATORY, IE_FACILITY,
625 IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, -1};
626static int ie_STATUS[] = {IE_CAUSE | IE_MANDATORY, IE_CALL_STATE |
627 IE_MANDATORY, IE_DISPLAY, -1};
628static int ie_STATUS_ENQUIRY[] = {IE_DISPLAY, -1};
629static int ie_SUSPEND_ACKNOWLEDGE[] = {IE_DISPLAY, IE_FACILITY, -1};
630static int ie_SUSPEND_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
631/* not used
632 * static int ie_CONGESTION_CONTROL[] = {IE_CONGESTION | IE_MANDATORY,
633 * IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1};
634 * static int ie_USER_INFORMATION[] = {IE_MORE_DATA, IE_USER_USER | IE_MANDATORY, -1};
635 * static int ie_RESTART[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_RESTART_IND |
636 * IE_MANDATORY, -1};
637 */
638static int ie_FACILITY[] = {IE_FACILITY | IE_MANDATORY, IE_DISPLAY, -1};
639static int comp_required[] = {1,2,3,5,6,7,9,10,11,14,15,-1};
640static int l3_valid_states[] = {0,1,2,3,4,6,7,8,9,10,11,12,15,17,19,25,-1};
641
642struct ie_len {
643 int ie;
644 int len;
645};
646
647static
648struct ie_len max_ie_len[] = {
649 {IE_SEGMENT, 4},
650 {IE_BEARER, 12},
651 {IE_CAUSE, 32},
652 {IE_CALL_ID, 10},
653 {IE_CALL_STATE, 3},
654 {IE_CHANNEL_ID, 34},
655 {IE_FACILITY, 255},
656 {IE_PROGRESS, 4},
657 {IE_NET_FAC, 255},
658 {IE_NOTIFY, 3},
659 {IE_DISPLAY, 82},
660 {IE_DATE, 8},
661 {IE_KEYPAD, 34},
662 {IE_SIGNAL, 3},
663 {IE_INFORATE, 6},
664 {IE_E2E_TDELAY, 11},
665 {IE_TDELAY_SEL, 5},
666 {IE_PACK_BINPARA, 3},
667 {IE_PACK_WINSIZE, 4},
668 {IE_PACK_SIZE, 4},
669 {IE_CUG, 7},
670 {IE_REV_CHARGE, 3},
671 {IE_CALLING_PN, 24},
672 {IE_CALLING_SUB, 23},
673 {IE_CALLED_PN, 24},
674 {IE_CALLED_SUB, 23},
675 {IE_REDIR_NR, 255},
676 {IE_TRANS_SEL, 255},
677 {IE_RESTART_IND, 3},
678 {IE_LLC, 18},
679 {IE_HLC, 5},
680 {IE_USER_USER, 131},
681 {-1,0},
682};
683
684static int
685getmax_ie_len(u_char ie) {
686 int i = 0;
687 while (max_ie_len[i].ie != -1) {
688 if (max_ie_len[i].ie == ie)
689 return(max_ie_len[i].len);
690 i++;
691 }
692 return(255);
693}
694
695static int
696ie_in_set(struct l3_process *pc, u_char ie, int *checklist) {
697 int ret = 1;
698
699 while (*checklist != -1) {
700 if ((*checklist & 0xff) == ie) {
701 if (ie & 0x80)
702 return(-ret);
703 else
704 return(ret);
705 }
706 ret++;
707 checklist++;
708 }
709 return(0);
710}
711
712static int
713check_infoelements(struct l3_process *pc, struct sk_buff *skb, int *checklist)
714{
715 int *cl = checklist;
716 u_char mt;
717 u_char *p, ie;
718 int l, newpos, oldpos;
719 int err_seq = 0, err_len = 0, err_compr = 0, err_ureg = 0;
720 u_char codeset = 0;
721 u_char old_codeset = 0;
722 u_char codelock = 1;
723
724 p = skb->data;
725 /* skip cr */
726 p++;
727 l = (*p++) & 0xf;
728 p += l;
729 mt = *p++;
730 oldpos = 0;
731 while ((p - skb->data) < skb->len) {
732 if ((*p & 0xf0) == 0x90) { /* shift codeset */
733 old_codeset = codeset;
734 codeset = *p & 7;
735 if (*p & 0x08)
736 codelock = 0;
737 else
738 codelock = 1;
739 if (pc->debug & L3_DEB_CHECK)
740 l3_debug(pc->st, "check IE shift%scodeset %d->%d",
741 codelock ? " locking ": " ", old_codeset, codeset);
742 p++;
743 continue;
744 }
745 if (!codeset) { /* only codeset 0 */
746 if ((newpos = ie_in_set(pc, *p, cl))) {
747 if (newpos > 0) {
748 if (newpos < oldpos)
749 err_seq++;
750 else
751 oldpos = newpos;
752 }
753 } else {
754 if (ie_in_set(pc, *p, comp_required))
755 err_compr++;
756 else
757 err_ureg++;
758 }
759 }
760 ie = *p++;
761 if (ie & 0x80) {
762 l = 1;
763 } else {
764 l = *p++;
765 p += l;
766 l += 2;
767 }
768 if (!codeset && (l > getmax_ie_len(ie)))
769 err_len++;
770 if (!codelock) {
771 if (pc->debug & L3_DEB_CHECK)
772 l3_debug(pc->st, "check IE shift back codeset %d->%d",
773 codeset, old_codeset);
774 codeset = old_codeset;
775 codelock = 1;
776 }
777 }
778 if (err_compr | err_ureg | err_len | err_seq) {
779 if (pc->debug & L3_DEB_CHECK)
780 l3_debug(pc->st, "check IE MT(%x) %d/%d/%d/%d",
781 mt, err_compr, err_ureg, err_len, err_seq);
782 if (err_compr)
783 return(ERR_IE_COMPREHENSION);
784 if (err_ureg)
785 return(ERR_IE_UNRECOGNIZED);
786 if (err_len)
787 return(ERR_IE_LENGTH);
788 if (err_seq)
789 return(ERR_IE_SEQUENCE);
790 }
791 return(0);
792}
793
794/* verify if a message type exists and contain no IE error */
795static int
796l3dss1_check_messagetype_validity(struct l3_process *pc, int mt, void *arg)
797{
798 switch (mt) {
799 case MT_ALERTING:
800 case MT_CALL_PROCEEDING:
801 case MT_CONNECT:
802 case MT_CONNECT_ACKNOWLEDGE:
803 case MT_DISCONNECT:
804 case MT_INFORMATION:
805 case MT_FACILITY:
806 case MT_NOTIFY:
807 case MT_PROGRESS:
808 case MT_RELEASE:
809 case MT_RELEASE_COMPLETE:
810 case MT_SETUP:
811 case MT_SETUP_ACKNOWLEDGE:
812 case MT_RESUME_ACKNOWLEDGE:
813 case MT_RESUME_REJECT:
814 case MT_SUSPEND_ACKNOWLEDGE:
815 case MT_SUSPEND_REJECT:
816 case MT_USER_INFORMATION:
817 case MT_RESTART:
818 case MT_RESTART_ACKNOWLEDGE:
819 case MT_CONGESTION_CONTROL:
820 case MT_STATUS:
821 case MT_STATUS_ENQUIRY:
822 if (pc->debug & L3_DEB_CHECK)
823 l3_debug(pc->st, "l3dss1_check_messagetype_validity mt(%x) OK", mt);
824 break;
825 case MT_RESUME: /* RESUME only in user->net */
826 case MT_SUSPEND: /* SUSPEND only in user->net */
827 default:
828 if (pc->debug & (L3_DEB_CHECK | L3_DEB_WARN))
829 l3_debug(pc->st, "l3dss1_check_messagetype_validity mt(%x) fail", mt);
830 pc->para.cause = 97;
831 l3dss1_status_send(pc, 0, NULL);
832 return(1);
833 }
834 return(0);
835}
836
837static void
838l3dss1_std_ie_err(struct l3_process *pc, int ret) {
839
840 if (pc->debug & L3_DEB_CHECK)
841 l3_debug(pc->st, "check_infoelements ret %d", ret);
842 switch(ret) {
843 case 0:
844 break;
845 case ERR_IE_COMPREHENSION:
846 pc->para.cause = 96;
847 l3dss1_status_send(pc, 0, NULL);
848 break;
849 case ERR_IE_UNRECOGNIZED:
850 pc->para.cause = 99;
851 l3dss1_status_send(pc, 0, NULL);
852 break;
853 case ERR_IE_LENGTH:
854 pc->para.cause = 100;
855 l3dss1_status_send(pc, 0, NULL);
856 break;
857 case ERR_IE_SEQUENCE:
858 default:
859 break;
860 }
861}
862
863static int
864l3dss1_get_channel_id(struct l3_process *pc, struct sk_buff *skb) {
865 u_char *p;
866
867 p = skb->data;
868 if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) {
869 p++;
870 if (*p != 1) { /* len for BRI = 1 */
871 if (pc->debug & L3_DEB_WARN)
872 l3_debug(pc->st, "wrong chid len %d", *p);
873 return (-2);
874 }
875 p++;
876 if (*p & 0x60) { /* only base rate interface */
877 if (pc->debug & L3_DEB_WARN)
878 l3_debug(pc->st, "wrong chid %x", *p);
879 return (-3);
880 }
881 return(*p & 0x3);
882 } else
883 return(-1);
884}
885
886static int
887l3dss1_get_cause(struct l3_process *pc, struct sk_buff *skb) {
888 u_char l, i=0;
889 u_char *p;
890
891 p = skb->data;
892 pc->para.cause = 31;
893 pc->para.loc = 0;
894 if ((p = findie(p, skb->len, IE_CAUSE, 0))) {
895 p++;
896 l = *p++;
897 if (l>30)
898 return(1);
899 if (l) {
900 pc->para.loc = *p++;
901 l--;
902 } else {
903 return(2);
904 }
905 if (l && !(pc->para.loc & 0x80)) {
906 l--;
907 p++; /* skip recommendation */
908 }
909 if (l) {
910 pc->para.cause = *p++;
911 l--;
912 if (!(pc->para.cause & 0x80))
913 return(3);
914 } else
915 return(4);
916 while (l && (i<6)) {
917 pc->para.diag[i++] = *p++;
918 l--;
919 }
920 } else
921 return(-1);
922 return(0);
923}
924
925static void
926l3dss1_msg_with_uus(struct l3_process *pc, u_char cmd)
927{
928 struct sk_buff *skb;
929 u_char tmp[16+40];
930 u_char *p = tmp;
931 int l;
932
933 MsgHead(p, pc->callref, cmd);
934
935 if (pc->prot.dss1.uus1_data[0])
936 { *p++ = IE_USER_USER; /* UUS info element */
937 *p++ = strlen(pc->prot.dss1.uus1_data) + 1;
938 *p++ = 0x04; /* IA5 chars */
939 strcpy(p,pc->prot.dss1.uus1_data);
940 p += strlen(pc->prot.dss1.uus1_data);
941 pc->prot.dss1.uus1_data[0] = '\0';
942 }
943
944 l = p - tmp;
945 if (!(skb = l3_alloc_skb(l)))
946 return;
947 memcpy(skb_put(skb, l), tmp, l);
948 l3_msg(pc->st, DL_DATA | REQUEST, skb);
949} /* l3dss1_msg_with_uus */
950
951static void
952l3dss1_release_req(struct l3_process *pc, u_char pr, void *arg)
953{
954 StopAllL3Timer(pc);
955 newl3state(pc, 19);
956 if (!pc->prot.dss1.uus1_data[0])
957 l3dss1_message(pc, MT_RELEASE);
958 else
959 l3dss1_msg_with_uus(pc, MT_RELEASE);
960 L3AddTimer(&pc->timer, T308, CC_T308_1);
961}
962
963static void
964l3dss1_release_cmpl(struct l3_process *pc, u_char pr, void *arg)
965{
966 struct sk_buff *skb = arg;
967 int ret;
968
969 if ((ret = l3dss1_get_cause(pc, skb))>0) {
970 if (pc->debug & L3_DEB_WARN)
971 l3_debug(pc->st, "RELCMPL get_cause ret(%d)",ret);
972 } else if (ret < 0)
973 pc->para.cause = NO_CAUSE;
974 StopAllL3Timer(pc);
975 newl3state(pc, 0);
976 pc->st->l3.l3l4(pc->st, CC_RELEASE | CONFIRM, pc);
977 dss1_release_l3_process(pc);
978}
979
980#if EXT_BEARER_CAPS
981
982static u_char *
983EncodeASyncParams(u_char * p, u_char si2)
984{ // 7c 06 88 90 21 42 00 bb
985
986 p[0] = 0;
987 p[1] = 0x40; // Intermediate rate: 16 kbit/s jj 2000.02.19
988 p[2] = 0x80;
989 if (si2 & 32) // 7 data bits
990
991 p[2] += 16;
992 else // 8 data bits
993
994 p[2] += 24;
995
996 if (si2 & 16) // 2 stop bits
997
998 p[2] += 96;
999 else // 1 stop bit
1000
1001 p[2] += 32;
1002
1003 if (si2 & 8) // even parity
1004
1005 p[2] += 2;
1006 else // no parity
1007
1008 p[2] += 3;
1009
1010 switch (si2 & 0x07) {
1011 case 0:
1012 p[0] = 66; // 1200 bit/s
1013
1014 break;
1015 case 1:
1016 p[0] = 88; // 1200/75 bit/s
1017
1018 break;
1019 case 2:
1020 p[0] = 87; // 75/1200 bit/s
1021
1022 break;
1023 case 3:
1024 p[0] = 67; // 2400 bit/s
1025
1026 break;
1027 case 4:
1028 p[0] = 69; // 4800 bit/s
1029
1030 break;
1031 case 5:
1032 p[0] = 72; // 9600 bit/s
1033
1034 break;
1035 case 6:
1036 p[0] = 73; // 14400 bit/s
1037
1038 break;
1039 case 7:
1040 p[0] = 75; // 19200 bit/s
1041
1042 break;
1043 }
1044 return p + 3;
1045}
1046
1047static u_char
1048EncodeSyncParams(u_char si2, u_char ai)
1049{
1050
1051 switch (si2) {
1052 case 0:
1053 return ai + 2; // 1200 bit/s
1054
1055 case 1:
1056 return ai + 24; // 1200/75 bit/s
1057
1058 case 2:
1059 return ai + 23; // 75/1200 bit/s
1060
1061 case 3:
1062 return ai + 3; // 2400 bit/s
1063
1064 case 4:
1065 return ai + 5; // 4800 bit/s
1066
1067 case 5:
1068 return ai + 8; // 9600 bit/s
1069
1070 case 6:
1071 return ai + 9; // 14400 bit/s
1072
1073 case 7:
1074 return ai + 11; // 19200 bit/s
1075
1076 case 8:
1077 return ai + 14; // 48000 bit/s
1078
1079 case 9:
1080 return ai + 15; // 56000 bit/s
1081
1082 case 15:
1083 return ai + 40; // negotiate bit/s
1084
1085 default:
1086 break;
1087 }
1088 return ai;
1089}
1090
1091
1092static u_char
1093DecodeASyncParams(u_char si2, u_char * p)
1094{
1095 u_char info;
1096
1097 switch (p[5]) {
1098 case 66: // 1200 bit/s
1099
1100 break; // si2 don't change
1101
1102 case 88: // 1200/75 bit/s
1103
1104 si2 += 1;
1105 break;
1106 case 87: // 75/1200 bit/s
1107
1108 si2 += 2;
1109 break;
1110 case 67: // 2400 bit/s
1111
1112 si2 += 3;
1113 break;
1114 case 69: // 4800 bit/s
1115
1116 si2 += 4;
1117 break;
1118 case 72: // 9600 bit/s
1119
1120 si2 += 5;
1121 break;
1122 case 73: // 14400 bit/s
1123
1124 si2 += 6;
1125 break;
1126 case 75: // 19200 bit/s
1127
1128 si2 += 7;
1129 break;
1130 }
1131
1132 info = p[7] & 0x7f;
1133 if ((info & 16) && (!(info & 8))) // 7 data bits
1134
1135 si2 += 32; // else 8 data bits
1136
1137 if ((info & 96) == 96) // 2 stop bits
1138
1139 si2 += 16; // else 1 stop bit
1140
1141 if ((info & 2) && (!(info & 1))) // even parity
1142
1143 si2 += 8; // else no parity
1144
1145 return si2;
1146}
1147
1148
1149static u_char
1150DecodeSyncParams(u_char si2, u_char info)
1151{
1152 info &= 0x7f;
1153 switch (info) {
1154 case 40: // bit/s negotiation failed ai := 165 not 175!
1155
1156 return si2 + 15;
1157 case 15: // 56000 bit/s failed, ai := 0 not 169 !
1158
1159 return si2 + 9;
1160 case 14: // 48000 bit/s
1161
1162 return si2 + 8;
1163 case 11: // 19200 bit/s
1164
1165 return si2 + 7;
1166 case 9: // 14400 bit/s
1167
1168 return si2 + 6;
1169 case 8: // 9600 bit/s
1170
1171 return si2 + 5;
1172 case 5: // 4800 bit/s
1173
1174 return si2 + 4;
1175 case 3: // 2400 bit/s
1176
1177 return si2 + 3;
1178 case 23: // 75/1200 bit/s
1179
1180 return si2 + 2;
1181 case 24: // 1200/75 bit/s
1182
1183 return si2 + 1;
1184 default: // 1200 bit/s
1185
1186 return si2;
1187 }
1188}
1189
1190static u_char
1191DecodeSI2(struct sk_buff *skb)
1192{
1193 u_char *p; //, *pend=skb->data + skb->len;
1194
1195 if ((p = findie(skb->data, skb->len, 0x7c, 0))) {
1196 switch (p[4] & 0x0f) {
1197 case 0x01:
1198 if (p[1] == 0x04) // sync. Bitratenadaption
1199
1200 return DecodeSyncParams(160, p[5]); // V.110/X.30
1201
1202 else if (p[1] == 0x06) // async. Bitratenadaption
1203
1204 return DecodeASyncParams(192, p); // V.110/X.30
1205
1206 break;
1207 case 0x08: // if (p[5] == 0x02) // sync. Bitratenadaption
1208 if (p[1] > 3)
1209 return DecodeSyncParams(176, p[5]); // V.120
1210 break;
1211 }
1212 }
1213 return 0;
1214}
1215
1216#endif
1217
1218
1219static void
1220l3dss1_setup_req(struct l3_process *pc, u_char pr,
1221 void *arg)
1222{
1223 struct sk_buff *skb;
1224 u_char tmp[128];
1225 u_char *p = tmp;
1226 u_char channel = 0;
1227
1228 u_char send_keypad;
1229 u_char screen = 0x80;
1230 u_char *teln;
1231 u_char *msn;
1232 u_char *sub;
1233 u_char *sp;
1234 int l;
1235
1236 MsgHead(p, pc->callref, MT_SETUP);
1237
1238 teln = pc->para.setup.phone;
1239#ifndef CONFIG_HISAX_NO_KEYPAD
1240 send_keypad = (strchr(teln,'*') || strchr(teln,'#')) ? 1 : 0;
1241#else
1242 send_keypad = 0;
1243#endif
1244#ifndef CONFIG_HISAX_NO_SENDCOMPLETE
1245 if (!send_keypad)
1246 *p++ = 0xa1; /* complete indicator */
1247#endif
1248 /*
1249 * Set Bearer Capability, Map info from 1TR6-convention to EDSS1
1250 */
1251 switch (pc->para.setup.si1) {
1252 case 1: /* Telephony */
1253 *p++ = IE_BEARER;
1254 *p++ = 0x3; /* Length */
1255 *p++ = 0x90; /* Coding Std. CCITT, 3.1 kHz audio */
1256 *p++ = 0x90; /* Circuit-Mode 64kbps */
1257 *p++ = 0xa3; /* A-Law Audio */
1258 break;
1259 case 5: /* Datatransmission 64k, BTX */
1260 case 7: /* Datatransmission 64k */
1261 default:
1262 *p++ = IE_BEARER;
1263 *p++ = 0x2; /* Length */
1264 *p++ = 0x88; /* Coding Std. CCITT, unrestr. dig. Inform. */
1265 *p++ = 0x90; /* Circuit-Mode 64kbps */
1266 break;
1267 }
1268
1269 if (send_keypad) {
1270 *p++ = IE_KEYPAD;
1271 *p++ = strlen(teln);
1272 while (*teln)
1273 *p++ = (*teln++) & 0x7F;
1274 }
1275
1276 /*
1277 * What about info2? Mapping to High-Layer-Compatibility?
1278 */
1279 if ((*teln) && (!send_keypad)) {
1280 /* parse number for special things */
1281 if (!isdigit(*teln)) {
1282 switch (0x5f & *teln) {
1283 case 'C':
1284 channel = 0x08;
1285 case 'P':
1286 channel |= 0x80;
1287 teln++;
1288 if (*teln == '1')
1289 channel |= 0x01;
1290 else
1291 channel |= 0x02;
1292 break;
1293 case 'R':
1294 screen = 0xA0;
1295 break;
1296 case 'D':
1297 screen = 0x80;
1298 break;
1299
1300 default:
1301 if (pc->debug & L3_DEB_WARN)
1302 l3_debug(pc->st, "Wrong MSN Code");
1303 break;
1304 }
1305 teln++;
1306 }
1307 }
1308 if (channel) {
1309 *p++ = IE_CHANNEL_ID;
1310 *p++ = 1;
1311 *p++ = channel;
1312 }
1313 msn = pc->para.setup.eazmsn;
1314 sub = NULL;
1315 sp = msn;
1316 while (*sp) {
1317 if ('.' == *sp) {
1318 sub = sp;
1319 *sp = 0;
1320 } else
1321 sp++;
1322 }
1323 if (*msn) {
1324 *p++ = IE_CALLING_PN;
1325 *p++ = strlen(msn) + (screen ? 2 : 1);
1326 /* Classify as AnyPref. */
1327 if (screen) {
1328 *p++ = 0x01; /* Ext = '0'B, Type = '000'B, Plan = '0001'B. */
1329 *p++ = screen;
1330 } else
1331 *p++ = 0x81; /* Ext = '1'B, Type = '000'B, Plan = '0001'B. */
1332 while (*msn)
1333 *p++ = *msn++ & 0x7f;
1334 }
1335 if (sub) {
1336 *sub++ = '.';
1337 *p++ = IE_CALLING_SUB;
1338 *p++ = strlen(sub) + 2;
1339 *p++ = 0x80; /* NSAP coded */
1340 *p++ = 0x50; /* local IDI format */
1341 while (*sub)
1342 *p++ = *sub++ & 0x7f;
1343 }
1344 sub = NULL;
1345 sp = teln;
1346 while (*sp) {
1347 if ('.' == *sp) {
1348 sub = sp;
1349 *sp = 0;
1350 } else
1351 sp++;
1352 }
1353
1354 if (!send_keypad) {
1355 *p++ = IE_CALLED_PN;
1356 *p++ = strlen(teln) + 1;
1357 /* Classify as AnyPref. */
1358 *p++ = 0x81; /* Ext = '1'B, Type = '000'B, Plan = '0001'B. */
1359 while (*teln)
1360 *p++ = *teln++ & 0x7f;
1361
1362 if (sub) {
1363 *sub++ = '.';
1364 *p++ = IE_CALLED_SUB;
1365 *p++ = strlen(sub) + 2;
1366 *p++ = 0x80; /* NSAP coded */
1367 *p++ = 0x50; /* local IDI format */
1368 while (*sub)
1369 *p++ = *sub++ & 0x7f;
1370 }
1371 }
1372#if EXT_BEARER_CAPS
1373 if ((pc->para.setup.si2 >= 160) && (pc->para.setup.si2 <= 175)) { // sync. Bitratenadaption, V.110/X.30
1374
1375 *p++ = IE_LLC;
1376 *p++ = 0x04;
1377 *p++ = 0x88;
1378 *p++ = 0x90;
1379 *p++ = 0x21;
1380 *p++ = EncodeSyncParams(pc->para.setup.si2 - 160, 0x80);
1381 } else if ((pc->para.setup.si2 >= 176) && (pc->para.setup.si2 <= 191)) { // sync. Bitratenadaption, V.120
1382
1383 *p++ = IE_LLC;
1384 *p++ = 0x05;
1385 *p++ = 0x88;
1386 *p++ = 0x90;
1387 *p++ = 0x28;
1388 *p++ = EncodeSyncParams(pc->para.setup.si2 - 176, 0);
1389 *p++ = 0x82;
1390 } else if (pc->para.setup.si2 >= 192) { // async. Bitratenadaption, V.110/X.30
1391
1392 *p++ = IE_LLC;
1393 *p++ = 0x06;
1394 *p++ = 0x88;
1395 *p++ = 0x90;
1396 *p++ = 0x21;
1397 p = EncodeASyncParams(p, pc->para.setup.si2 - 192);
1398#ifndef CONFIG_HISAX_NO_LLC
1399 } else {
1400 switch (pc->para.setup.si1) {
1401 case 1: /* Telephony */
1402 *p++ = IE_LLC;
1403 *p++ = 0x3; /* Length */
1404 *p++ = 0x90; /* Coding Std. CCITT, 3.1 kHz audio */
1405 *p++ = 0x90; /* Circuit-Mode 64kbps */
1406 *p++ = 0xa3; /* A-Law Audio */
1407 break;
1408 case 5: /* Datatransmission 64k, BTX */
1409 case 7: /* Datatransmission 64k */
1410 default:
1411 *p++ = IE_LLC;
1412 *p++ = 0x2; /* Length */
1413 *p++ = 0x88; /* Coding Std. CCITT, unrestr. dig. Inform. */
1414 *p++ = 0x90; /* Circuit-Mode 64kbps */
1415 break;
1416 }
1417#endif
1418 }
1419#endif
1420 l = p - tmp;
1421 if (!(skb = l3_alloc_skb(l)))
1422 return;
1423 memcpy(skb_put(skb, l), tmp, l);
1424 L3DelTimer(&pc->timer);
1425 L3AddTimer(&pc->timer, T303, CC_T303);
1426 newl3state(pc, 1);
1427 l3_msg(pc->st, DL_DATA | REQUEST, skb);
1428}
1429
1430static void
1431l3dss1_call_proc(struct l3_process *pc, u_char pr, void *arg)
1432{
1433 struct sk_buff *skb = arg;
1434 int id, ret;
1435
1436 if ((id = l3dss1_get_channel_id(pc, skb)) >= 0) {
1437 if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
1438 if (pc->debug & L3_DEB_WARN)
1439 l3_debug(pc->st, "setup answer with wrong chid %x", id);
1440 pc->para.cause = 100;
1441 l3dss1_status_send(pc, pr, NULL);
1442 return;
1443 }
1444 pc->para.bchannel = id;
1445 } else if (1 == pc->state) {
1446 if (pc->debug & L3_DEB_WARN)
1447 l3_debug(pc->st, "setup answer wrong chid (ret %d)", id);
1448 if (id == -1)
1449 pc->para.cause = 96;
1450 else
1451 pc->para.cause = 100;
1452 l3dss1_status_send(pc, pr, NULL);
1453 return;
1454 }
1455 /* Now we are on none mandatory IEs */
1456 ret = check_infoelements(pc, skb, ie_CALL_PROCEEDING);
1457 if (ERR_IE_COMPREHENSION == ret) {
1458 l3dss1_std_ie_err(pc, ret);
1459 return;
1460 }
1461 L3DelTimer(&pc->timer);
1462 newl3state(pc, 3);
1463 L3AddTimer(&pc->timer, T310, CC_T310);
1464 if (ret) /* STATUS for none mandatory IE errors after actions are taken */
1465 l3dss1_std_ie_err(pc, ret);
1466 pc->st->l3.l3l4(pc->st, CC_PROCEEDING | INDICATION, pc);
1467}
1468
1469static void
1470l3dss1_setup_ack(struct l3_process *pc, u_char pr, void *arg)
1471{
1472 struct sk_buff *skb = arg;
1473 int id, ret;
1474
1475 if ((id = l3dss1_get_channel_id(pc, skb)) >= 0) {
1476 if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
1477 if (pc->debug & L3_DEB_WARN)
1478 l3_debug(pc->st, "setup answer with wrong chid %x", id);
1479 pc->para.cause = 100;
1480 l3dss1_status_send(pc, pr, NULL);
1481 return;
1482 }
1483 pc->para.bchannel = id;
1484 } else {
1485 if (pc->debug & L3_DEB_WARN)
1486 l3_debug(pc->st, "setup answer wrong chid (ret %d)", id);
1487 if (id == -1)
1488 pc->para.cause = 96;
1489 else
1490 pc->para.cause = 100;
1491 l3dss1_status_send(pc, pr, NULL);
1492 return;
1493 }
1494 /* Now we are on none mandatory IEs */
1495 ret = check_infoelements(pc, skb, ie_SETUP_ACKNOWLEDGE);
1496 if (ERR_IE_COMPREHENSION == ret) {
1497 l3dss1_std_ie_err(pc, ret);
1498 return;
1499 }
1500 L3DelTimer(&pc->timer);
1501 newl3state(pc, 2);
1502 L3AddTimer(&pc->timer, T304, CC_T304);
1503 if (ret) /* STATUS for none mandatory IE errors after actions are taken */
1504 l3dss1_std_ie_err(pc, ret);
1505 pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
1506}
1507
1508static void
1509l3dss1_disconnect(struct l3_process *pc, u_char pr, void *arg)
1510{
1511 struct sk_buff *skb = arg;
1512 u_char *p;
1513 int ret;
1514 u_char cause = 0;
1515
1516 StopAllL3Timer(pc);
1517 if ((ret = l3dss1_get_cause(pc, skb))) {
1518 if (pc->debug & L3_DEB_WARN)
1519 l3_debug(pc->st, "DISC get_cause ret(%d)", ret);
1520 if (ret < 0)
1521 cause = 96;
1522 else if (ret > 0)
1523 cause = 100;
1524 }
1525 if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
1526 l3dss1_parse_facility(pc->st, pc, pc->callref, p);
1527 ret = check_infoelements(pc, skb, ie_DISCONNECT);
1528 if (ERR_IE_COMPREHENSION == ret)
1529 cause = 96;
1530 else if ((!cause) && (ERR_IE_UNRECOGNIZED == ret))
1531 cause = 99;
1532 ret = pc->state;
1533 newl3state(pc, 12);
1534 if (cause)
1535 newl3state(pc, 19);
1536 if (11 != ret)
1537 pc->st->l3.l3l4(pc->st, CC_DISCONNECT | INDICATION, pc);
1538 else if (!cause)
1539 l3dss1_release_req(pc, pr, NULL);
1540 if (cause) {
1541 l3dss1_message_cause(pc, MT_RELEASE, cause);
1542 L3AddTimer(&pc->timer, T308, CC_T308_1);
1543 }
1544}
1545
1546static void
1547l3dss1_connect(struct l3_process *pc, u_char pr, void *arg)
1548{
1549 struct sk_buff *skb = arg;
1550 int ret;
1551
1552 ret = check_infoelements(pc, skb, ie_CONNECT);
1553 if (ERR_IE_COMPREHENSION == ret) {
1554 l3dss1_std_ie_err(pc, ret);
1555 return;
1556 }
1557 L3DelTimer(&pc->timer); /* T310 */
1558 newl3state(pc, 10);
1559 pc->para.chargeinfo = 0;
1560 /* here should inserted COLP handling KKe */
1561 if (ret)
1562 l3dss1_std_ie_err(pc, ret);
1563 pc->st->l3.l3l4(pc->st, CC_SETUP | CONFIRM, pc);
1564}
1565
1566static void
1567l3dss1_alerting(struct l3_process *pc, u_char pr, void *arg)
1568{
1569 struct sk_buff *skb = arg;
1570 int ret;
1571
1572 ret = check_infoelements(pc, skb, ie_ALERTING);
1573 if (ERR_IE_COMPREHENSION == ret) {
1574 l3dss1_std_ie_err(pc, ret);
1575 return;
1576 }
1577 L3DelTimer(&pc->timer); /* T304 */
1578 newl3state(pc, 4);
1579 if (ret)
1580 l3dss1_std_ie_err(pc, ret);
1581 pc->st->l3.l3l4(pc->st, CC_ALERTING | INDICATION, pc);
1582}
1583
1584static void
1585l3dss1_setup(struct l3_process *pc, u_char pr, void *arg)
1586{
1587 u_char *p;
1588 int bcfound = 0;
1589 char tmp[80];
1590 struct sk_buff *skb = arg;
1591 int id;
1592 int err = 0;
1593
1594 /*
1595 * Bearer Capabilities
1596 */
1597 p = skb->data;
1598 /* only the first occurence 'll be detected ! */
1599 if ((p = findie(p, skb->len, 0x04, 0))) {
1600 if ((p[1] < 2) || (p[1] > 11))
1601 err = 1;
1602 else {
1603 pc->para.setup.si2 = 0;
1604 switch (p[2] & 0x7f) {
1605 case 0x00: /* Speech */
1606 case 0x10: /* 3.1 Khz audio */
1607 pc->para.setup.si1 = 1;
1608 break;
1609 case 0x08: /* Unrestricted digital information */
1610 pc->para.setup.si1 = 7;
1611/* JIM, 05.11.97 I wanna set service indicator 2 */
1612#if EXT_BEARER_CAPS
1613 pc->para.setup.si2 = DecodeSI2(skb);
1614#endif
1615 break;
1616 case 0x09: /* Restricted digital information */
1617 pc->para.setup.si1 = 2;
1618 break;
1619 case 0x11:
1620 /* Unrestr. digital information with
1621 * tones/announcements ( or 7 kHz audio
1622 */
1623 pc->para.setup.si1 = 3;
1624 break;
1625 case 0x18: /* Video */
1626 pc->para.setup.si1 = 4;
1627 break;
1628 default:
1629 err = 2;
1630 break;
1631 }
1632 switch (p[3] & 0x7f) {
1633 case 0x40: /* packed mode */
1634 pc->para.setup.si1 = 8;
1635 break;
1636 case 0x10: /* 64 kbit */
1637 case 0x11: /* 2*64 kbit */
1638 case 0x13: /* 384 kbit */
1639 case 0x15: /* 1536 kbit */
1640 case 0x17: /* 1920 kbit */
1641 pc->para.moderate = p[3] & 0x7f;
1642 break;
1643 default:
1644 err = 3;
1645 break;
1646 }
1647 }
1648 if (pc->debug & L3_DEB_SI)
1649 l3_debug(pc->st, "SI=%d, AI=%d",
1650 pc->para.setup.si1, pc->para.setup.si2);
1651 if (err) {
1652 if (pc->debug & L3_DEB_WARN)
1653 l3_debug(pc->st, "setup with wrong bearer(l=%d:%x,%x)",
1654 p[1], p[2], p[3]);
1655 pc->para.cause = 100;
1656 l3dss1_msg_without_setup(pc, pr, NULL);
1657 return;
1658 }
1659 } else {
1660 if (pc->debug & L3_DEB_WARN)
1661 l3_debug(pc->st, "setup without bearer capabilities");
1662 /* ETS 300-104 1.3.3 */
1663 pc->para.cause = 96;
1664 l3dss1_msg_without_setup(pc, pr, NULL);
1665 return;
1666 }
1667 /*
1668 * Channel Identification
1669 */
1670 if ((id = l3dss1_get_channel_id(pc, skb)) >= 0) {
1671 if ((pc->para.bchannel = id)) {
1672 if ((3 == id) && (0x10 == pc->para.moderate)) {
1673 if (pc->debug & L3_DEB_WARN)
1674 l3_debug(pc->st, "setup with wrong chid %x",
1675 id);
1676 pc->para.cause = 100;
1677 l3dss1_msg_without_setup(pc, pr, NULL);
1678 return;
1679 }
1680 bcfound++;
1681 } else
1682 { if (pc->debug & L3_DEB_WARN)
1683 l3_debug(pc->st, "setup without bchannel, call waiting");
1684 bcfound++;
1685 }
1686 } else {
1687 if (pc->debug & L3_DEB_WARN)
1688 l3_debug(pc->st, "setup with wrong chid ret %d", id);
1689 if (id == -1)
1690 pc->para.cause = 96;
1691 else
1692 pc->para.cause = 100;
1693 l3dss1_msg_without_setup(pc, pr, NULL);
1694 return;
1695 }
1696 /* Now we are on none mandatory IEs */
1697 err = check_infoelements(pc, skb, ie_SETUP);
1698 if (ERR_IE_COMPREHENSION == err) {
1699 pc->para.cause = 96;
1700 l3dss1_msg_without_setup(pc, pr, NULL);
1701 return;
1702 }
1703 p = skb->data;
1704 if ((p = findie(p, skb->len, 0x70, 0)))
1705 iecpy(pc->para.setup.eazmsn, p, 1);
1706 else
1707 pc->para.setup.eazmsn[0] = 0;
1708
1709 p = skb->data;
1710 if ((p = findie(p, skb->len, 0x71, 0))) {
1711 /* Called party subaddress */
1712 if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) {
1713 tmp[0] = '.';
1714 iecpy(&tmp[1], p, 2);
1715 strcat(pc->para.setup.eazmsn, tmp);
1716 } else if (pc->debug & L3_DEB_WARN)
1717 l3_debug(pc->st, "wrong called subaddress");
1718 }
1719 p = skb->data;
1720 if ((p = findie(p, skb->len, 0x6c, 0))) {
1721 pc->para.setup.plan = p[2];
1722 if (p[2] & 0x80) {
1723 iecpy(pc->para.setup.phone, p, 1);
1724 pc->para.setup.screen = 0;
1725 } else {
1726 iecpy(pc->para.setup.phone, p, 2);
1727 pc->para.setup.screen = p[3];
1728 }
1729 } else {
1730 pc->para.setup.phone[0] = 0;
1731 pc->para.setup.plan = 0;
1732 pc->para.setup.screen = 0;
1733 }
1734 p = skb->data;
1735 if ((p = findie(p, skb->len, 0x6d, 0))) {
1736 /* Calling party subaddress */
1737 if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) {
1738 tmp[0] = '.';
1739 iecpy(&tmp[1], p, 2);
1740 strcat(pc->para.setup.phone, tmp);
1741 } else if (pc->debug & L3_DEB_WARN)
1742 l3_debug(pc->st, "wrong calling subaddress");
1743 }
1744 newl3state(pc, 6);
1745 if (err) /* STATUS for none mandatory IE errors after actions are taken */
1746 l3dss1_std_ie_err(pc, err);
1747 pc->st->l3.l3l4(pc->st, CC_SETUP | INDICATION, pc);
1748}
1749
1750static void
1751l3dss1_reset(struct l3_process *pc, u_char pr, void *arg)
1752{
1753 dss1_release_l3_process(pc);
1754}
1755
1756static void
1757l3dss1_disconnect_req(struct l3_process *pc, u_char pr, void *arg)
1758{
1759 struct sk_buff *skb;
1760 u_char tmp[16+40];
1761 u_char *p = tmp;
1762 int l;
1763 u_char cause = 16;
1764
1765 if (pc->para.cause != NO_CAUSE)
1766 cause = pc->para.cause;
1767
1768 StopAllL3Timer(pc);
1769
1770 MsgHead(p, pc->callref, MT_DISCONNECT);
1771
1772 *p++ = IE_CAUSE;
1773 *p++ = 0x2;
1774 *p++ = 0x80;
1775 *p++ = cause | 0x80;
1776
1777 if (pc->prot.dss1.uus1_data[0])
1778 { *p++ = IE_USER_USER; /* UUS info element */
1779 *p++ = strlen(pc->prot.dss1.uus1_data) + 1;
1780 *p++ = 0x04; /* IA5 chars */
1781 strcpy(p,pc->prot.dss1.uus1_data);
1782 p += strlen(pc->prot.dss1.uus1_data);
1783 pc->prot.dss1.uus1_data[0] = '\0';
1784 }
1785
1786 l = p - tmp;
1787 if (!(skb = l3_alloc_skb(l)))
1788 return;
1789 memcpy(skb_put(skb, l), tmp, l);
1790 newl3state(pc, 11);
1791 l3_msg(pc->st, DL_DATA | REQUEST, skb);
1792 L3AddTimer(&pc->timer, T305, CC_T305);
1793}
1794
1795static void
1796l3dss1_setup_rsp(struct l3_process *pc, u_char pr,
1797 void *arg)
1798{
1799 if (!pc->para.bchannel)
1800 { if (pc->debug & L3_DEB_WARN)
1801 l3_debug(pc->st, "D-chan connect for waiting call");
1802 l3dss1_disconnect_req(pc, pr, arg);
1803 return;
1804 }
1805 newl3state(pc, 8);
1806 l3dss1_message(pc, MT_CONNECT);
1807 L3DelTimer(&pc->timer);
1808 L3AddTimer(&pc->timer, T313, CC_T313);
1809}
1810
1811static void
1812l3dss1_connect_ack(struct l3_process *pc, u_char pr, void *arg)
1813{
1814 struct sk_buff *skb = arg;
1815 int ret;
1816
1817 ret = check_infoelements(pc, skb, ie_CONNECT_ACKNOWLEDGE);
1818 if (ERR_IE_COMPREHENSION == ret) {
1819 l3dss1_std_ie_err(pc, ret);
1820 return;
1821 }
1822 newl3state(pc, 10);
1823 L3DelTimer(&pc->timer);
1824 if (ret)
1825 l3dss1_std_ie_err(pc, ret);
1826 pc->st->l3.l3l4(pc->st, CC_SETUP_COMPL | INDICATION, pc);
1827}
1828
1829static void
1830l3dss1_reject_req(struct l3_process *pc, u_char pr, void *arg)
1831{
1832 struct sk_buff *skb;
1833 u_char tmp[16];
1834 u_char *p = tmp;
1835 int l;
1836 u_char cause = 21;
1837
1838 if (pc->para.cause != NO_CAUSE)
1839 cause = pc->para.cause;
1840
1841 MsgHead(p, pc->callref, MT_RELEASE_COMPLETE);
1842
1843 *p++ = IE_CAUSE;
1844 *p++ = 0x2;
1845 *p++ = 0x80;
1846 *p++ = cause | 0x80;
1847
1848 l = p - tmp;
1849 if (!(skb = l3_alloc_skb(l)))
1850 return;
1851 memcpy(skb_put(skb, l), tmp, l);
1852 l3_msg(pc->st, DL_DATA | REQUEST, skb);
1853 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
1854 newl3state(pc, 0);
1855 dss1_release_l3_process(pc);
1856}
1857
1858static void
1859l3dss1_release(struct l3_process *pc, u_char pr, void *arg)
1860{
1861 struct sk_buff *skb = arg;
1862 u_char *p;
1863 int ret, cause=0;
1864
1865 StopAllL3Timer(pc);
1866 if ((ret = l3dss1_get_cause(pc, skb))>0) {
1867 if (pc->debug & L3_DEB_WARN)
1868 l3_debug(pc->st, "REL get_cause ret(%d)", ret);
1869 } else if (ret<0)
1870 pc->para.cause = NO_CAUSE;
1871 if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
1872 l3dss1_parse_facility(pc->st, pc, pc->callref, p);
1873 }
1874 if ((ret<0) && (pc->state != 11))
1875 cause = 96;
1876 else if (ret>0)
1877 cause = 100;
1878 ret = check_infoelements(pc, skb, ie_RELEASE);
1879 if (ERR_IE_COMPREHENSION == ret)
1880 cause = 96;
1881 else if ((ERR_IE_UNRECOGNIZED == ret) && (!cause))
1882 cause = 99;
1883 if (cause)
1884 l3dss1_message_cause(pc, MT_RELEASE_COMPLETE, cause);
1885 else
1886 l3dss1_message(pc, MT_RELEASE_COMPLETE);
1887 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
1888 newl3state(pc, 0);
1889 dss1_release_l3_process(pc);
1890}
1891
1892static void
1893l3dss1_alert_req(struct l3_process *pc, u_char pr,
1894 void *arg)
1895{
1896 newl3state(pc, 7);
1897 if (!pc->prot.dss1.uus1_data[0])
1898 l3dss1_message(pc, MT_ALERTING);
1899 else
1900 l3dss1_msg_with_uus(pc, MT_ALERTING);
1901}
1902
1903static void
1904l3dss1_proceed_req(struct l3_process *pc, u_char pr,
1905 void *arg)
1906{
1907 newl3state(pc, 9);
1908 l3dss1_message(pc, MT_CALL_PROCEEDING);
1909 pc->st->l3.l3l4(pc->st, CC_PROCEED_SEND | INDICATION, pc);
1910}
1911
1912static void
1913l3dss1_setup_ack_req(struct l3_process *pc, u_char pr,
1914 void *arg)
1915{
1916 newl3state(pc, 25);
1917 L3DelTimer(&pc->timer);
1918 L3AddTimer(&pc->timer, T302, CC_T302);
1919 l3dss1_message(pc, MT_SETUP_ACKNOWLEDGE);
1920}
1921
1922/********************************************/
1923/* deliver a incoming display message to HL */
1924/********************************************/
1925static void
1926l3dss1_deliver_display(struct l3_process *pc, int pr, u_char *infp)
1927{ u_char len;
1928 isdn_ctrl ic;
1929 struct IsdnCardState *cs;
1930 char *p;
1931
1932 if (*infp++ != IE_DISPLAY) return;
1933 if ((len = *infp++) > 80) return; /* total length <= 82 */
1934 if (!pc->chan) return;
1935
1936 p = ic.parm.display;
1937 while (len--)
1938 *p++ = *infp++;
1939 *p = '\0';
1940 ic.command = ISDN_STAT_DISPLAY;
1941 cs = pc->st->l1.hardware;
1942 ic.driver = cs->myid;
1943 ic.arg = pc->chan->chan;
1944 cs->iif.statcallb(&ic);
1945} /* l3dss1_deliver_display */
1946
1947
1948static void
1949l3dss1_progress(struct l3_process *pc, u_char pr, void *arg)
1950{
1951 struct sk_buff *skb = arg;
1952 int err = 0;
1953 u_char *p;
1954
1955 if ((p = findie(skb->data, skb->len, IE_PROGRESS, 0))) {
1956 if (p[1] != 2) {
1957 err = 1;
1958 pc->para.cause = 100;
1959 } else if (!(p[2] & 0x70)) {
1960 switch (p[2]) {
1961 case 0x80:
1962 case 0x81:
1963 case 0x82:
1964 case 0x84:
1965 case 0x85:
1966 case 0x87:
1967 case 0x8a:
1968 switch (p[3]) {
1969 case 0x81:
1970 case 0x82:
1971 case 0x83:
1972 case 0x84:
1973 case 0x88:
1974 break;
1975 default:
1976 err = 2;
1977 pc->para.cause = 100;
1978 break;
1979 }
1980 break;
1981 default:
1982 err = 3;
1983 pc->para.cause = 100;
1984 break;
1985 }
1986 }
1987 } else {
1988 pc->para.cause = 96;
1989 err = 4;
1990 }
1991 if (err) {
1992 if (pc->debug & L3_DEB_WARN)
1993 l3_debug(pc->st, "progress error %d", err);
1994 l3dss1_status_send(pc, pr, NULL);
1995 return;
1996 }
1997 /* Now we are on none mandatory IEs */
1998 err = check_infoelements(pc, skb, ie_PROGRESS);
1999 if (err)
2000 l3dss1_std_ie_err(pc, err);
2001 if (ERR_IE_COMPREHENSION != err)
2002 pc->st->l3.l3l4(pc->st, CC_PROGRESS | INDICATION, pc);
2003}
2004
2005static void
2006l3dss1_notify(struct l3_process *pc, u_char pr, void *arg)
2007{
2008 struct sk_buff *skb = arg;
2009 int err = 0;
2010 u_char *p;
2011
2012 if ((p = findie(skb->data, skb->len, IE_NOTIFY, 0))) {
2013 if (p[1] != 1) {
2014 err = 1;
2015 pc->para.cause = 100;
2016 } else {
2017 switch (p[2]) {
2018 case 0x80:
2019 case 0x81:
2020 case 0x82:
2021 break;
2022 default:
2023 pc->para.cause = 100;
2024 err = 2;
2025 break;
2026 }
2027 }
2028 } else {
2029 pc->para.cause = 96;
2030 err = 3;
2031 }
2032 if (err) {
2033 if (pc->debug & L3_DEB_WARN)
2034 l3_debug(pc->st, "notify error %d", err);
2035 l3dss1_status_send(pc, pr, NULL);
2036 return;
2037 }
2038 /* Now we are on none mandatory IEs */
2039 err = check_infoelements(pc, skb, ie_NOTIFY);
2040 if (err)
2041 l3dss1_std_ie_err(pc, err);
2042 if (ERR_IE_COMPREHENSION != err)
2043 pc->st->l3.l3l4(pc->st, CC_NOTIFY | INDICATION, pc);
2044}
2045
2046static void
2047l3dss1_status_enq(struct l3_process *pc, u_char pr, void *arg)
2048{
2049 int ret;
2050 struct sk_buff *skb = arg;
2051
2052 ret = check_infoelements(pc, skb, ie_STATUS_ENQUIRY);
2053 l3dss1_std_ie_err(pc, ret);
2054 pc->para.cause = 30; /* response to STATUS_ENQUIRY */
2055 l3dss1_status_send(pc, pr, NULL);
2056}
2057
2058static void
2059l3dss1_information(struct l3_process *pc, u_char pr, void *arg)
2060{
2061 int ret;
2062 struct sk_buff *skb = arg;
2063 u_char *p;
2064 char tmp[32];
2065
2066 ret = check_infoelements(pc, skb, ie_INFORMATION);
2067 if (ret)
2068 l3dss1_std_ie_err(pc, ret);
2069 if (pc->state == 25) { /* overlap receiving */
2070 L3DelTimer(&pc->timer);
2071 p = skb->data;
2072 if ((p = findie(p, skb->len, 0x70, 0))) {
2073 iecpy(tmp, p, 1);
2074 strcat(pc->para.setup.eazmsn, tmp);
2075 pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc);
2076 }
2077 L3AddTimer(&pc->timer, T302, CC_T302);
2078 }
2079}
2080
2081/******************************/
2082/* handle deflection requests */
2083/******************************/
2084static void l3dss1_redir_req(struct l3_process *pc, u_char pr, void *arg)
2085{
2086 struct sk_buff *skb;
2087 u_char tmp[128];
2088 u_char *p = tmp;
2089 u_char *subp;
2090 u_char len_phone = 0;
2091 u_char len_sub = 0;
2092 int l;
2093
2094
2095 strcpy(pc->prot.dss1.uus1_data,pc->chan->setup.eazmsn); /* copy uus element if available */
2096 if (!pc->chan->setup.phone[0])
2097 { pc->para.cause = -1;
2098 l3dss1_disconnect_req(pc,pr,arg); /* disconnect immediately */
2099 return;
2100 } /* only uus */
2101
2102 if (pc->prot.dss1.invoke_id)
2103 free_invoke_id(pc->st,pc->prot.dss1.invoke_id);
2104
2105 if (!(pc->prot.dss1.invoke_id = new_invoke_id(pc->st)))
2106 return;
2107
2108 MsgHead(p, pc->callref, MT_FACILITY);
2109
2110 for (subp = pc->chan->setup.phone; (*subp) && (*subp != '.'); subp++) len_phone++; /* len of phone number */
2111 if (*subp++ == '.') len_sub = strlen(subp) + 2; /* length including info subaddress element */
2112
2113 *p++ = 0x1c; /* Facility info element */
2114 *p++ = len_phone + len_sub + 2 + 2 + 8 + 3 + 3; /* length of element */
2115 *p++ = 0x91; /* remote operations protocol */
2116 *p++ = 0xa1; /* invoke component */
2117
2118 *p++ = len_phone + len_sub + 2 + 2 + 8 + 3; /* length of data */
2119 *p++ = 0x02; /* invoke id tag, integer */
2120 *p++ = 0x01; /* length */
2121 *p++ = pc->prot.dss1.invoke_id; /* invoke id */
2122 *p++ = 0x02; /* operation value tag, integer */
2123 *p++ = 0x01; /* length */
2124 *p++ = 0x0D; /* Call Deflect */
2125
2126 *p++ = 0x30; /* sequence phone number */
2127 *p++ = len_phone + 2 + 2 + 3 + len_sub; /* length */
2128
2129 *p++ = 0x30; /* Deflected to UserNumber */
2130 *p++ = len_phone+2+len_sub; /* length */
2131 *p++ = 0x80; /* NumberDigits */
2132 *p++ = len_phone; /* length */
2133 for (l = 0; l < len_phone; l++)
2134 *p++ = pc->chan->setup.phone[l];
2135
2136 if (len_sub)
2137 { *p++ = 0x04; /* called party subaddress */
2138 *p++ = len_sub - 2;
2139 while (*subp) *p++ = *subp++;
2140 }
2141
2142 *p++ = 0x01; /* screening identifier */
2143 *p++ = 0x01;
2144 *p++ = pc->chan->setup.screen;
2145
2146 l = p - tmp;
2147 if (!(skb = l3_alloc_skb(l))) return;
2148 memcpy(skb_put(skb, l), tmp, l);
2149
2150 l3_msg(pc->st, DL_DATA | REQUEST, skb);
2151} /* l3dss1_redir_req */
2152
2153/********************************************/
2154/* handle deflection request in early state */
2155/********************************************/
2156static void l3dss1_redir_req_early(struct l3_process *pc, u_char pr, void *arg)
2157{
2158 l3dss1_proceed_req(pc,pr,arg);
2159 l3dss1_redir_req(pc,pr,arg);
2160} /* l3dss1_redir_req_early */
2161
2162/***********************************************/
2163/* handle special commands for this protocol. */
2164/* Examples are call independant services like */
2165/* remote operations with dummy callref. */
2166/***********************************************/
2167static int l3dss1_cmd_global(struct PStack *st, isdn_ctrl *ic)
2168{ u_char id;
2169 u_char temp[265];
2170 u_char *p = temp;
2171 int i, l, proc_len;
2172 struct sk_buff *skb;
2173 struct l3_process *pc = NULL;
2174
2175 switch (ic->arg)
2176 { case DSS1_CMD_INVOKE:
2177 if (ic->parm.dss1_io.datalen < 0) return(-2); /* invalid parameter */
2178
2179 for (proc_len = 1, i = ic->parm.dss1_io.proc >> 8; i; i++)
2180 i = i >> 8; /* add one byte */
2181 l = ic->parm.dss1_io.datalen + proc_len + 8; /* length excluding ie header */
2182 if (l > 255)
2183 return(-2); /* too long */
2184
2185 if (!(id = new_invoke_id(st)))
2186 return(0); /* first get a invoke id -> return if no available */
2187
2188 i = -1;
2189 MsgHead(p, i, MT_FACILITY); /* build message head */
2190 *p++ = 0x1C; /* Facility IE */
2191 *p++ = l; /* length of ie */
2192 *p++ = 0x91; /* remote operations */
2193 *p++ = 0xA1; /* invoke */
2194 *p++ = l - 3; /* length of invoke */
2195 *p++ = 0x02; /* invoke id tag */
2196 *p++ = 0x01; /* length is 1 */
2197 *p++ = id; /* invoke id */
2198 *p++ = 0x02; /* operation */
2199 *p++ = proc_len; /* length of operation */
2200
2201 for (i = proc_len; i; i--)
2202 *p++ = (ic->parm.dss1_io.proc >> (i-1)) & 0xFF;
2203 memcpy(p, ic->parm.dss1_io.data, ic->parm.dss1_io.datalen); /* copy data */
2204 l = (p - temp) + ic->parm.dss1_io.datalen; /* total length */
2205
2206 if (ic->parm.dss1_io.timeout > 0)
2207 if (!(pc = dss1_new_l3_process(st, -1)))
2208 { free_invoke_id(st, id);
2209 return(-2);
2210 }
2211 pc->prot.dss1.ll_id = ic->parm.dss1_io.ll_id; /* remember id */
2212 pc->prot.dss1.proc = ic->parm.dss1_io.proc; /* and procedure */
2213
2214 if (!(skb = l3_alloc_skb(l)))
2215 { free_invoke_id(st, id);
2216 if (pc) dss1_release_l3_process(pc);
2217 return(-2);
2218 }
2219 memcpy(skb_put(skb, l), temp, l);
2220
2221 if (pc)
2222 { pc->prot.dss1.invoke_id = id; /* remember id */
2223 L3AddTimer(&pc->timer, ic->parm.dss1_io.timeout, CC_TDSS1_IO | REQUEST);
2224 }
2225
2226 l3_msg(st, DL_DATA | REQUEST, skb);
2227 ic->parm.dss1_io.hl_id = id; /* return id */
2228 return(0);
2229
2230 case DSS1_CMD_INVOKE_ABORT:
2231 if ((pc = l3dss1_search_dummy_proc(st, ic->parm.dss1_io.hl_id)))
2232 { L3DelTimer(&pc->timer); /* remove timer */
2233 dss1_release_l3_process(pc);
2234 return(0);
2235 }
2236 else
2237 { l3_debug(st, "l3dss1_cmd_global abort unknown id");
2238 return(-2);
2239 }
2240 break;
2241
2242 default:
2243 l3_debug(st, "l3dss1_cmd_global unknown cmd 0x%lx", ic->arg);
2244 return(-1);
2245 } /* switch ic-> arg */
2246 return(-1);
2247} /* l3dss1_cmd_global */
2248
2249static void
2250l3dss1_io_timer(struct l3_process *pc)
2251{ isdn_ctrl ic;
2252 struct IsdnCardState *cs = pc->st->l1.hardware;
2253
2254 L3DelTimer(&pc->timer); /* remove timer */
2255
2256 ic.driver = cs->myid;
2257 ic.command = ISDN_STAT_PROT;
2258 ic.arg = DSS1_STAT_INVOKE_ERR;
2259 ic.parm.dss1_io.hl_id = pc->prot.dss1.invoke_id;
2260 ic.parm.dss1_io.ll_id = pc->prot.dss1.ll_id;
2261 ic.parm.dss1_io.proc = pc->prot.dss1.proc;
2262 ic.parm.dss1_io.timeout= -1;
2263 ic.parm.dss1_io.datalen = 0;
2264 ic.parm.dss1_io.data = NULL;
2265 free_invoke_id(pc->st, pc->prot.dss1.invoke_id);
2266 pc->prot.dss1.invoke_id = 0; /* reset id */
2267
2268 cs->iif.statcallb(&ic);
2269
2270 dss1_release_l3_process(pc);
2271} /* l3dss1_io_timer */
2272
2273static void
2274l3dss1_release_ind(struct l3_process *pc, u_char pr, void *arg)
2275{
2276 u_char *p;
2277 struct sk_buff *skb = arg;
2278 int callState = 0;
2279 p = skb->data;
2280
2281 if ((p = findie(p, skb->len, IE_CALL_STATE, 0))) {
2282 p++;
2283 if (1 == *p++)
2284 callState = *p;
2285 }
2286 if (callState == 0) {
2287 /* ETS 300-104 7.6.1, 8.6.1, 10.6.1... and 16.1
2288 * set down layer 3 without sending any message
2289 */
2290 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2291 newl3state(pc, 0);
2292 dss1_release_l3_process(pc);
2293 } else {
2294 pc->st->l3.l3l4(pc->st, CC_IGNORE | INDICATION, pc);
2295 }
2296}
2297
2298static void
2299l3dss1_dummy(struct l3_process *pc, u_char pr, void *arg)
2300{
2301}
2302
2303static void
2304l3dss1_t302(struct l3_process *pc, u_char pr, void *arg)
2305{
2306 L3DelTimer(&pc->timer);
2307 pc->para.loc = 0;
2308 pc->para.cause = 28; /* invalid number */
2309 l3dss1_disconnect_req(pc, pr, NULL);
2310 pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2311}
2312
2313static void
2314l3dss1_t303(struct l3_process *pc, u_char pr, void *arg)
2315{
2316 if (pc->N303 > 0) {
2317 pc->N303--;
2318 L3DelTimer(&pc->timer);
2319 l3dss1_setup_req(pc, pr, arg);
2320 } else {
2321 L3DelTimer(&pc->timer);
2322 l3dss1_message_cause(pc, MT_RELEASE_COMPLETE, 102);
2323 pc->st->l3.l3l4(pc->st, CC_NOSETUP_RSP, pc);
2324 dss1_release_l3_process(pc);
2325 }
2326}
2327
2328static void
2329l3dss1_t304(struct l3_process *pc, u_char pr, void *arg)
2330{
2331 L3DelTimer(&pc->timer);
2332 pc->para.loc = 0;
2333 pc->para.cause = 102;
2334 l3dss1_disconnect_req(pc, pr, NULL);
2335 pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2336
2337}
2338
2339static void
2340l3dss1_t305(struct l3_process *pc, u_char pr, void *arg)
2341{
2342 u_char tmp[16];
2343 u_char *p = tmp;
2344 int l;
2345 struct sk_buff *skb;
2346 u_char cause = 16;
2347
2348 L3DelTimer(&pc->timer);
2349 if (pc->para.cause != NO_CAUSE)
2350 cause = pc->para.cause;
2351
2352 MsgHead(p, pc->callref, MT_RELEASE);
2353
2354 *p++ = IE_CAUSE;
2355 *p++ = 0x2;
2356 *p++ = 0x80;
2357 *p++ = cause | 0x80;
2358
2359 l = p - tmp;
2360 if (!(skb = l3_alloc_skb(l)))
2361 return;
2362 memcpy(skb_put(skb, l), tmp, l);
2363 newl3state(pc, 19);
2364 l3_msg(pc->st, DL_DATA | REQUEST, skb);
2365 L3AddTimer(&pc->timer, T308, CC_T308_1);
2366}
2367
2368static void
2369l3dss1_t310(struct l3_process *pc, u_char pr, void *arg)
2370{
2371 L3DelTimer(&pc->timer);
2372 pc->para.loc = 0;
2373 pc->para.cause = 102;
2374 l3dss1_disconnect_req(pc, pr, NULL);
2375 pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2376}
2377
2378static void
2379l3dss1_t313(struct l3_process *pc, u_char pr, void *arg)
2380{
2381 L3DelTimer(&pc->timer);
2382 pc->para.loc = 0;
2383 pc->para.cause = 102;
2384 l3dss1_disconnect_req(pc, pr, NULL);
2385 pc->st->l3.l3l4(pc->st, CC_CONNECT_ERR, pc);
2386}
2387
2388static void
2389l3dss1_t308_1(struct l3_process *pc, u_char pr, void *arg)
2390{
2391 newl3state(pc, 19);
2392 L3DelTimer(&pc->timer);
2393 l3dss1_message(pc, MT_RELEASE);
2394 L3AddTimer(&pc->timer, T308, CC_T308_2);
2395}
2396
2397static void
2398l3dss1_t308_2(struct l3_process *pc, u_char pr, void *arg)
2399{
2400 L3DelTimer(&pc->timer);
2401 pc->st->l3.l3l4(pc->st, CC_RELEASE_ERR, pc);
2402 dss1_release_l3_process(pc);
2403}
2404
2405static void
2406l3dss1_t318(struct l3_process *pc, u_char pr, void *arg)
2407{
2408 L3DelTimer(&pc->timer);
2409 pc->para.cause = 102; /* Timer expiry */
2410 pc->para.loc = 0; /* local */
2411 pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc);
2412 newl3state(pc, 19);
2413 l3dss1_message(pc, MT_RELEASE);
2414 L3AddTimer(&pc->timer, T308, CC_T308_1);
2415}
2416
2417static void
2418l3dss1_t319(struct l3_process *pc, u_char pr, void *arg)
2419{
2420 L3DelTimer(&pc->timer);
2421 pc->para.cause = 102; /* Timer expiry */
2422 pc->para.loc = 0; /* local */
2423 pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc);
2424 newl3state(pc, 10);
2425}
2426
2427static void
2428l3dss1_restart(struct l3_process *pc, u_char pr, void *arg)
2429{
2430 L3DelTimer(&pc->timer);
2431 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2432 dss1_release_l3_process(pc);
2433}
2434
2435static void
2436l3dss1_status(struct l3_process *pc, u_char pr, void *arg)
2437{
2438 u_char *p;
2439 struct sk_buff *skb = arg;
2440 int ret;
2441 u_char cause = 0, callState = 0;
2442
2443 if ((ret = l3dss1_get_cause(pc, skb))) {
2444 if (pc->debug & L3_DEB_WARN)
2445 l3_debug(pc->st, "STATUS get_cause ret(%d)",ret);
2446 if (ret < 0)
2447 cause = 96;
2448 else if (ret > 0)
2449 cause = 100;
2450 }
2451 if ((p = findie(skb->data, skb->len, IE_CALL_STATE, 0))) {
2452 p++;
2453 if (1 == *p++) {
2454 callState = *p;
2455 if (!ie_in_set(pc, *p, l3_valid_states))
2456 cause = 100;
2457 } else
2458 cause = 100;
2459 } else
2460 cause = 96;
2461 if (!cause) { /* no error before */
2462 ret = check_infoelements(pc, skb, ie_STATUS);
2463 if (ERR_IE_COMPREHENSION == ret)
2464 cause = 96;
2465 else if (ERR_IE_UNRECOGNIZED == ret)
2466 cause = 99;
2467 }
2468 if (cause) {
2469 u_char tmp;
2470
2471 if (pc->debug & L3_DEB_WARN)
2472 l3_debug(pc->st, "STATUS error(%d/%d)",ret,cause);
2473 tmp = pc->para.cause;
2474 pc->para.cause = cause;
2475 l3dss1_status_send(pc, 0, NULL);
2476 if (cause == 99)
2477 pc->para.cause = tmp;
2478 else
2479 return;
2480 }
2481 cause = pc->para.cause;
2482 if (((cause & 0x7f) == 111) && (callState == 0)) {
2483 /* ETS 300-104 7.6.1, 8.6.1, 10.6.1...
2484 * if received MT_STATUS with cause == 111 and call
2485 * state == 0, then we must set down layer 3
2486 */
2487 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2488 newl3state(pc, 0);
2489 dss1_release_l3_process(pc);
2490 }
2491}
2492
2493static void
2494l3dss1_facility(struct l3_process *pc, u_char pr, void *arg)
2495{
2496 struct sk_buff *skb = arg;
2497 int ret;
2498
2499 ret = check_infoelements(pc, skb, ie_FACILITY);
2500 l3dss1_std_ie_err(pc, ret);
2501 {
2502 u_char *p;
2503 if ((p = findie(skb->data, skb->len, IE_FACILITY, 0)))
2504 l3dss1_parse_facility(pc->st, pc, pc->callref, p);
2505 }
2506}
2507
2508static void
2509l3dss1_suspend_req(struct l3_process *pc, u_char pr, void *arg)
2510{
2511 struct sk_buff *skb;
2512 u_char tmp[32];
2513 u_char *p = tmp;
2514 u_char i, l;
2515 u_char *msg = pc->chan->setup.phone;
2516
2517 MsgHead(p, pc->callref, MT_SUSPEND);
2518 l = *msg++;
2519 if (l && (l <= 10)) { /* Max length 10 octets */
2520 *p++ = IE_CALL_ID;
2521 *p++ = l;
2522 for (i = 0; i < l; i++)
2523 *p++ = *msg++;
2524 } else if (l) {
2525 l3_debug(pc->st, "SUS wrong CALL_ID len %d", l);
2526 return;
2527 }
2528 l = p - tmp;
2529 if (!(skb = l3_alloc_skb(l)))
2530 return;
2531 memcpy(skb_put(skb, l), tmp, l);
2532 l3_msg(pc->st, DL_DATA | REQUEST, skb);
2533 newl3state(pc, 15);
2534 L3AddTimer(&pc->timer, T319, CC_T319);
2535}
2536
2537static void
2538l3dss1_suspend_ack(struct l3_process *pc, u_char pr, void *arg)
2539{
2540 struct sk_buff *skb = arg;
2541 int ret;
2542
2543 L3DelTimer(&pc->timer);
2544 newl3state(pc, 0);
2545 pc->para.cause = NO_CAUSE;
2546 pc->st->l3.l3l4(pc->st, CC_SUSPEND | CONFIRM, pc);
2547 /* We don't handle suspend_ack for IE errors now */
2548 if ((ret = check_infoelements(pc, skb, ie_SUSPEND_ACKNOWLEDGE)))
2549 if (pc->debug & L3_DEB_WARN)
2550 l3_debug(pc->st, "SUSPACK check ie(%d)",ret);
2551 dss1_release_l3_process(pc);
2552}
2553
2554static void
2555l3dss1_suspend_rej(struct l3_process *pc, u_char pr, void *arg)
2556{
2557 struct sk_buff *skb = arg;
2558 int ret;
2559
2560 if ((ret = l3dss1_get_cause(pc, skb))) {
2561 if (pc->debug & L3_DEB_WARN)
2562 l3_debug(pc->st, "SUSP_REJ get_cause ret(%d)",ret);
2563 if (ret < 0)
2564 pc->para.cause = 96;
2565 else
2566 pc->para.cause = 100;
2567 l3dss1_status_send(pc, pr, NULL);
2568 return;
2569 }
2570 ret = check_infoelements(pc, skb, ie_SUSPEND_REJECT);
2571 if (ERR_IE_COMPREHENSION == ret) {
2572 l3dss1_std_ie_err(pc, ret);
2573 return;
2574 }
2575 L3DelTimer(&pc->timer);
2576 pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc);
2577 newl3state(pc, 10);
2578 if (ret) /* STATUS for none mandatory IE errors after actions are taken */
2579 l3dss1_std_ie_err(pc, ret);
2580}
2581
2582static void
2583l3dss1_resume_req(struct l3_process *pc, u_char pr, void *arg)
2584{
2585 struct sk_buff *skb;
2586 u_char tmp[32];
2587 u_char *p = tmp;
2588 u_char i, l;
2589 u_char *msg = pc->para.setup.phone;
2590
2591 MsgHead(p, pc->callref, MT_RESUME);
2592
2593 l = *msg++;
2594 if (l && (l <= 10)) { /* Max length 10 octets */
2595 *p++ = IE_CALL_ID;
2596 *p++ = l;
2597 for (i = 0; i < l; i++)
2598 *p++ = *msg++;
2599 } else if (l) {
2600 l3_debug(pc->st, "RES wrong CALL_ID len %d", l);
2601 return;
2602 }
2603 l = p - tmp;
2604 if (!(skb = l3_alloc_skb(l)))
2605 return;
2606 memcpy(skb_put(skb, l), tmp, l);
2607 l3_msg(pc->st, DL_DATA | REQUEST, skb);
2608 newl3state(pc, 17);
2609 L3AddTimer(&pc->timer, T318, CC_T318);
2610}
2611
2612static void
2613l3dss1_resume_ack(struct l3_process *pc, u_char pr, void *arg)
2614{
2615 struct sk_buff *skb = arg;
2616 int id, ret;
2617
2618 if ((id = l3dss1_get_channel_id(pc, skb)) > 0) {
2619 if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) {
2620 if (pc->debug & L3_DEB_WARN)
2621 l3_debug(pc->st, "resume ack with wrong chid %x", id);
2622 pc->para.cause = 100;
2623 l3dss1_status_send(pc, pr, NULL);
2624 return;
2625 }
2626 pc->para.bchannel = id;
2627 } else if (1 == pc->state) {
2628 if (pc->debug & L3_DEB_WARN)
2629 l3_debug(pc->st, "resume ack without chid (ret %d)", id);
2630 pc->para.cause = 96;
2631 l3dss1_status_send(pc, pr, NULL);
2632 return;
2633 }
2634 ret = check_infoelements(pc, skb, ie_RESUME_ACKNOWLEDGE);
2635 if (ERR_IE_COMPREHENSION == ret) {
2636 l3dss1_std_ie_err(pc, ret);
2637 return;
2638 }
2639 L3DelTimer(&pc->timer);
2640 pc->st->l3.l3l4(pc->st, CC_RESUME | CONFIRM, pc);
2641 newl3state(pc, 10);
2642 if (ret) /* STATUS for none mandatory IE errors after actions are taken */
2643 l3dss1_std_ie_err(pc, ret);
2644}
2645
2646static void
2647l3dss1_resume_rej(struct l3_process *pc, u_char pr, void *arg)
2648{
2649 struct sk_buff *skb = arg;
2650 int ret;
2651
2652 if ((ret = l3dss1_get_cause(pc, skb))) {
2653 if (pc->debug & L3_DEB_WARN)
2654 l3_debug(pc->st, "RES_REJ get_cause ret(%d)",ret);
2655 if (ret < 0)
2656 pc->para.cause = 96;
2657 else
2658 pc->para.cause = 100;
2659 l3dss1_status_send(pc, pr, NULL);
2660 return;
2661 }
2662 ret = check_infoelements(pc, skb, ie_RESUME_REJECT);
2663 if (ERR_IE_COMPREHENSION == ret) {
2664 l3dss1_std_ie_err(pc, ret);
2665 return;
2666 }
2667 L3DelTimer(&pc->timer);
2668 pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc);
2669 newl3state(pc, 0);
2670 if (ret) /* STATUS for none mandatory IE errors after actions are taken */
2671 l3dss1_std_ie_err(pc, ret);
2672 dss1_release_l3_process(pc);
2673}
2674
2675static void
2676l3dss1_global_restart(struct l3_process *pc, u_char pr, void *arg)
2677{
2678 u_char tmp[32];
2679 u_char *p;
2680 u_char ri, ch = 0, chan = 0;
2681 int l;
2682 struct sk_buff *skb = arg;
2683 struct l3_process *up;
2684
2685 newl3state(pc, 2);
2686 L3DelTimer(&pc->timer);
2687 p = skb->data;
2688 if ((p = findie(p, skb->len, IE_RESTART_IND, 0))) {
2689 ri = p[2];
2690 l3_debug(pc->st, "Restart %x", ri);
2691 } else {
2692 l3_debug(pc->st, "Restart without restart IE");
2693 ri = 0x86;
2694 }
2695 p = skb->data;
2696 if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) {
2697 chan = p[2] & 3;
2698 ch = p[2];
2699 if (pc->st->l3.debug)
2700 l3_debug(pc->st, "Restart for channel %d", chan);
2701 }
2702 newl3state(pc, 2);
2703 up = pc->st->l3.proc;
2704 while (up) {
2705 if ((ri & 7) == 7)
2706 up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up);
2707 else if (up->para.bchannel == chan)
2708 up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up);
2709 up = up->next;
2710 }
2711 p = tmp;
2712 MsgHead(p, pc->callref, MT_RESTART_ACKNOWLEDGE);
2713 if (chan) {
2714 *p++ = IE_CHANNEL_ID;
2715 *p++ = 1;
2716 *p++ = ch | 0x80;
2717 }
2718 *p++ = 0x79; /* RESTART Ind */
2719 *p++ = 1;
2720 *p++ = ri;
2721 l = p - tmp;
2722 if (!(skb = l3_alloc_skb(l)))
2723 return;
2724 memcpy(skb_put(skb, l), tmp, l);
2725 newl3state(pc, 0);
2726 l3_msg(pc->st, DL_DATA | REQUEST, skb);
2727}
2728
2729static void
2730l3dss1_dl_reset(struct l3_process *pc, u_char pr, void *arg)
2731{
2732 pc->para.cause = 0x29; /* Temporary failure */
2733 pc->para.loc = 0;
2734 l3dss1_disconnect_req(pc, pr, NULL);
2735 pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc);
2736}
2737
2738static void
2739l3dss1_dl_release(struct l3_process *pc, u_char pr, void *arg)
2740{
2741 newl3state(pc, 0);
2742 pc->para.cause = 0x1b; /* Destination out of order */
2743 pc->para.loc = 0;
2744 pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc);
2745 release_l3_process(pc);
2746}
2747
2748static void
2749l3dss1_dl_reestablish(struct l3_process *pc, u_char pr, void *arg)
2750{
2751 L3DelTimer(&pc->timer);
2752 L3AddTimer(&pc->timer, T309, CC_T309);
2753 l3_msg(pc->st, DL_ESTABLISH | REQUEST, NULL);
2754}
2755
2756static void
2757l3dss1_dl_reest_status(struct l3_process *pc, u_char pr, void *arg)
2758{
2759 L3DelTimer(&pc->timer);
2760
2761 pc->para.cause = 0x1F; /* normal, unspecified */
2762 l3dss1_status_send(pc, 0, NULL);
2763}
2764
2765/* *INDENT-OFF* */
2766static struct stateentry downstatelist[] =
2767{
2768 {SBIT(0),
2769 CC_SETUP | REQUEST, l3dss1_setup_req},
2770 {SBIT(0),
2771 CC_RESUME | REQUEST, l3dss1_resume_req},
2772 {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(25),
2773 CC_DISCONNECT | REQUEST, l3dss1_disconnect_req},
2774 {SBIT(12),
2775 CC_RELEASE | REQUEST, l3dss1_release_req},
2776 {ALL_STATES,
2777 CC_RESTART | REQUEST, l3dss1_restart},
2778 {SBIT(6) | SBIT(25),
2779 CC_IGNORE | REQUEST, l3dss1_reset},
2780 {SBIT(6) | SBIT(25),
2781 CC_REJECT | REQUEST, l3dss1_reject_req},
2782 {SBIT(6) | SBIT(25),
2783 CC_PROCEED_SEND | REQUEST, l3dss1_proceed_req},
2784 {SBIT(6),
2785 CC_MORE_INFO | REQUEST, l3dss1_setup_ack_req},
2786 {SBIT(25),
2787 CC_MORE_INFO | REQUEST, l3dss1_dummy},
2788 {SBIT(6) | SBIT(9) | SBIT(25),
2789 CC_ALERTING | REQUEST, l3dss1_alert_req},
2790 {SBIT(6) | SBIT(7) | SBIT(9) | SBIT(25),
2791 CC_SETUP | RESPONSE, l3dss1_setup_rsp},
2792 {SBIT(10),
2793 CC_SUSPEND | REQUEST, l3dss1_suspend_req},
2794 {SBIT(7) | SBIT(9) | SBIT(25),
2795 CC_REDIR | REQUEST, l3dss1_redir_req},
2796 {SBIT(6),
2797 CC_REDIR | REQUEST, l3dss1_redir_req_early},
2798 {SBIT(9) | SBIT(25),
2799 CC_DISCONNECT | REQUEST, l3dss1_disconnect_req},
2800 {SBIT(25),
2801 CC_T302, l3dss1_t302},
2802 {SBIT(1),
2803 CC_T303, l3dss1_t303},
2804 {SBIT(2),
2805 CC_T304, l3dss1_t304},
2806 {SBIT(3),
2807 CC_T310, l3dss1_t310},
2808 {SBIT(8),
2809 CC_T313, l3dss1_t313},
2810 {SBIT(11),
2811 CC_T305, l3dss1_t305},
2812 {SBIT(15),
2813 CC_T319, l3dss1_t319},
2814 {SBIT(17),
2815 CC_T318, l3dss1_t318},
2816 {SBIT(19),
2817 CC_T308_1, l3dss1_t308_1},
2818 {SBIT(19),
2819 CC_T308_2, l3dss1_t308_2},
2820 {SBIT(10),
2821 CC_T309, l3dss1_dl_release},
2822};
2823
2824#define DOWNSLLEN \
2825 (sizeof(downstatelist) / sizeof(struct stateentry))
2826
2827static struct stateentry datastatelist[] =
2828{
2829 {ALL_STATES,
2830 MT_STATUS_ENQUIRY, l3dss1_status_enq},
2831 {ALL_STATES,
2832 MT_FACILITY, l3dss1_facility},
2833 {SBIT(19),
2834 MT_STATUS, l3dss1_release_ind},
2835 {ALL_STATES,
2836 MT_STATUS, l3dss1_status},
2837 {SBIT(0),
2838 MT_SETUP, l3dss1_setup},
2839 {SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) |
2840 SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
2841 MT_SETUP, l3dss1_dummy},
2842 {SBIT(1) | SBIT(2),
2843 MT_CALL_PROCEEDING, l3dss1_call_proc},
2844 {SBIT(1),
2845 MT_SETUP_ACKNOWLEDGE, l3dss1_setup_ack},
2846 {SBIT(2) | SBIT(3),
2847 MT_ALERTING, l3dss1_alerting},
2848 {SBIT(2) | SBIT(3),
2849 MT_PROGRESS, l3dss1_progress},
2850 {SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) |
2851 SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
2852 MT_INFORMATION, l3dss1_information},
2853 {SBIT(10) | SBIT(11) | SBIT(15),
2854 MT_NOTIFY, l3dss1_notify},
2855 {SBIT(0) | SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(10) |
2856 SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25),
2857 MT_RELEASE_COMPLETE, l3dss1_release_cmpl},
2858 {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(25),
2859 MT_RELEASE, l3dss1_release},
2860 {SBIT(19), MT_RELEASE, l3dss1_release_ind},
2861 {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(15) | SBIT(17) | SBIT(25),
2862 MT_DISCONNECT, l3dss1_disconnect},
2863 {SBIT(19),
2864 MT_DISCONNECT, l3dss1_dummy},
2865 {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4),
2866 MT_CONNECT, l3dss1_connect},
2867 {SBIT(8),
2868 MT_CONNECT_ACKNOWLEDGE, l3dss1_connect_ack},
2869 {SBIT(15),
2870 MT_SUSPEND_ACKNOWLEDGE, l3dss1_suspend_ack},
2871 {SBIT(15),
2872 MT_SUSPEND_REJECT, l3dss1_suspend_rej},
2873 {SBIT(17),
2874 MT_RESUME_ACKNOWLEDGE, l3dss1_resume_ack},
2875 {SBIT(17),
2876 MT_RESUME_REJECT, l3dss1_resume_rej},
2877};
2878
2879#define DATASLLEN \
2880 (sizeof(datastatelist) / sizeof(struct stateentry))
2881
2882static struct stateentry globalmes_list[] =
2883{
2884 {ALL_STATES,
2885 MT_STATUS, l3dss1_status},
2886 {SBIT(0),
2887 MT_RESTART, l3dss1_global_restart},
2888/* {SBIT(1),
2889 MT_RESTART_ACKNOWLEDGE, l3dss1_restart_ack},
2890*/
2891};
2892#define GLOBALM_LEN \
2893 (sizeof(globalmes_list) / sizeof(struct stateentry))
2894
2895static struct stateentry manstatelist[] =
2896{
2897 {SBIT(2),
2898 DL_ESTABLISH | INDICATION, l3dss1_dl_reset},
2899 {SBIT(10),
2900 DL_ESTABLISH | CONFIRM, l3dss1_dl_reest_status},
2901 {SBIT(10),
2902 DL_RELEASE | INDICATION, l3dss1_dl_reestablish},
2903 {ALL_STATES,
2904 DL_RELEASE | INDICATION, l3dss1_dl_release},
2905};
2906
2907#define MANSLLEN \
2908 (sizeof(manstatelist) / sizeof(struct stateentry))
2909/* *INDENT-ON* */
2910
2911
2912static void
2913global_handler(struct PStack *st, int mt, struct sk_buff *skb)
2914{
2915 u_char tmp[16];
2916 u_char *p = tmp;
2917 int l;
2918 int i;
2919 struct l3_process *proc = st->l3.global;
2920
2921 proc->callref = skb->data[2]; /* cr flag */
2922 for (i = 0; i < GLOBALM_LEN; i++)
2923 if ((mt == globalmes_list[i].primitive) &&
2924 ((1 << proc->state) & globalmes_list[i].state))
2925 break;
2926 if (i == GLOBALM_LEN) {
2927 if (st->l3.debug & L3_DEB_STATE) {
2928 l3_debug(st, "dss1 global state %d mt %x unhandled",
2929 proc->state, mt);
2930 }
2931 MsgHead(p, proc->callref, MT_STATUS);
2932 *p++ = IE_CAUSE;
2933 *p++ = 0x2;
2934 *p++ = 0x80;
2935 *p++ = 81 |0x80; /* invalid cr */
2936 *p++ = 0x14; /* CallState */
2937 *p++ = 0x1;
2938 *p++ = proc->state & 0x3f;
2939 l = p - tmp;
2940 if (!(skb = l3_alloc_skb(l)))
2941 return;
2942 memcpy(skb_put(skb, l), tmp, l);
2943 l3_msg(proc->st, DL_DATA | REQUEST, skb);
2944 } else {
2945 if (st->l3.debug & L3_DEB_STATE) {
2946 l3_debug(st, "dss1 global %d mt %x",
2947 proc->state, mt);
2948 }
2949 globalmes_list[i].rout(proc, mt, skb);
2950 }
2951}
2952
2953static void
2954dss1up(struct PStack *st, int pr, void *arg)
2955{
2956 int i, mt, cr, cause, callState;
2957 char *ptr;
2958 u_char *p;
2959 struct sk_buff *skb = arg;
2960 struct l3_process *proc;
2961
2962 switch (pr) {
2963 case (DL_DATA | INDICATION):
2964 case (DL_UNIT_DATA | INDICATION):
2965 break;
2966 case (DL_ESTABLISH | CONFIRM):
2967 case (DL_ESTABLISH | INDICATION):
2968 case (DL_RELEASE | INDICATION):
2969 case (DL_RELEASE | CONFIRM):
2970 l3_msg(st, pr, arg);
2971 return;
2972 break;
2973 default:
2974 printk(KERN_ERR "HiSax dss1up unknown pr=%04x\n", pr);
2975 return;
2976 }
2977 if (skb->len < 3) {
2978 l3_debug(st, "dss1up frame too short(%d)", skb->len);
2979 dev_kfree_skb(skb);
2980 return;
2981 }
2982
2983 if (skb->data[0] != PROTO_DIS_EURO) {
2984 if (st->l3.debug & L3_DEB_PROTERR) {
2985 l3_debug(st, "dss1up%sunexpected discriminator %x message len %d",
2986 (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
2987 skb->data[0], skb->len);
2988 }
2989 dev_kfree_skb(skb);
2990 return;
2991 }
2992 cr = getcallref(skb->data);
2993 if (skb->len < ((skb->data[1] & 0x0f) + 3)) {
2994 l3_debug(st, "dss1up frame too short(%d)", skb->len);
2995 dev_kfree_skb(skb);
2996 return;
2997 }
2998 mt = skb->data[skb->data[1] + 2];
2999 if (st->l3.debug & L3_DEB_STATE)
3000 l3_debug(st, "dss1up cr %d", cr);
3001 if (cr == -2) { /* wrong Callref */
3002 if (st->l3.debug & L3_DEB_WARN)
3003 l3_debug(st, "dss1up wrong Callref");
3004 dev_kfree_skb(skb);
3005 return;
3006 } else if (cr == -1) { /* Dummy Callref */
3007 if (mt == MT_FACILITY)
3008 if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) {
3009 l3dss1_parse_facility(st, NULL,
3010 (pr == (DL_DATA | INDICATION)) ? -1 : -2, p);
3011 dev_kfree_skb(skb);
3012 return;
3013 }
3014 if (st->l3.debug & L3_DEB_WARN)
3015 l3_debug(st, "dss1up dummy Callref (no facility msg or ie)");
3016 dev_kfree_skb(skb);
3017 return;
3018 } else if ((((skb->data[1] & 0x0f) == 1) && (0==(cr & 0x7f))) ||
3019 (((skb->data[1] & 0x0f) == 2) && (0==(cr & 0x7fff)))) { /* Global CallRef */
3020 if (st->l3.debug & L3_DEB_STATE)
3021 l3_debug(st, "dss1up Global CallRef");
3022 global_handler(st, mt, skb);
3023 dev_kfree_skb(skb);
3024 return;
3025 } else if (!(proc = getl3proc(st, cr))) {
3026 /* No transaction process exist, that means no call with
3027 * this callreference is active
3028 */
3029 if (mt == MT_SETUP) {
3030 /* Setup creates a new transaction process */
3031 if (skb->data[2] & 0x80) {
3032 /* Setup with wrong CREF flag */
3033 if (st->l3.debug & L3_DEB_STATE)
3034 l3_debug(st, "dss1up wrong CRef flag");
3035 dev_kfree_skb(skb);
3036 return;
3037 }
3038 if (!(proc = dss1_new_l3_process(st, cr))) {
3039 /* May be to answer with RELEASE_COMPLETE and
3040 * CAUSE 0x2f "Resource unavailable", but this
3041 * need a new_l3_process too ... arghh
3042 */
3043 dev_kfree_skb(skb);
3044 return;
3045 }
3046 } else if (mt == MT_STATUS) {
3047 cause = 0;
3048 if ((ptr = findie(skb->data, skb->len, IE_CAUSE, 0)) != NULL) {
3049 ptr++;
3050 if (*ptr++ == 2)
3051 ptr++;
3052 cause = *ptr & 0x7f;
3053 }
3054 callState = 0;
3055 if ((ptr = findie(skb->data, skb->len, IE_CALL_STATE, 0)) != NULL) {
3056 ptr++;
3057 if (*ptr++ == 2)
3058 ptr++;
3059 callState = *ptr;
3060 }
3061 /* ETS 300-104 part 2.4.1
3062 * if setup has not been made and a message type
3063 * MT_STATUS is received with call state == 0,
3064 * we must send nothing
3065 */
3066 if (callState != 0) {
3067 /* ETS 300-104 part 2.4.2
3068 * if setup has not been made and a message type
3069 * MT_STATUS is received with call state != 0,
3070 * we must send MT_RELEASE_COMPLETE cause 101
3071 */
3072 if ((proc = dss1_new_l3_process(st, cr))) {
3073 proc->para.cause = 101;
3074 l3dss1_msg_without_setup(proc, 0, NULL);
3075 }
3076 }
3077 dev_kfree_skb(skb);
3078 return;
3079 } else if (mt == MT_RELEASE_COMPLETE) {
3080 dev_kfree_skb(skb);
3081 return;
3082 } else {
3083 /* ETS 300-104 part 2
3084 * if setup has not been made and a message type
3085 * (except MT_SETUP and RELEASE_COMPLETE) is received,
3086 * we must send MT_RELEASE_COMPLETE cause 81 */
3087 dev_kfree_skb(skb);
3088 if ((proc = dss1_new_l3_process(st, cr))) {
3089 proc->para.cause = 81;
3090 l3dss1_msg_without_setup(proc, 0, NULL);
3091 }
3092 return;
3093 }
3094 }
3095 if (l3dss1_check_messagetype_validity(proc, mt, skb)) {
3096 dev_kfree_skb(skb);
3097 return;
3098 }
3099 if ((p = findie(skb->data, skb->len, IE_DISPLAY, 0)) != NULL)
3100 l3dss1_deliver_display(proc, pr, p); /* Display IE included */
3101 for (i = 0; i < DATASLLEN; i++)
3102 if ((mt == datastatelist[i].primitive) &&
3103 ((1 << proc->state) & datastatelist[i].state))
3104 break;
3105 if (i == DATASLLEN) {
3106 if (st->l3.debug & L3_DEB_STATE) {
3107 l3_debug(st, "dss1up%sstate %d mt %#x unhandled",
3108 (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
3109 proc->state, mt);
3110 }
3111 if ((MT_RELEASE_COMPLETE != mt) && (MT_RELEASE != mt)) {
3112 proc->para.cause = 101;
3113 l3dss1_status_send(proc, pr, skb);
3114 }
3115 } else {
3116 if (st->l3.debug & L3_DEB_STATE) {
3117 l3_debug(st, "dss1up%sstate %d mt %x",
3118 (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ",
3119 proc->state, mt);
3120 }
3121 datastatelist[i].rout(proc, pr, skb);
3122 }
3123 dev_kfree_skb(skb);
3124 return;
3125}
3126
3127static void
3128dss1down(struct PStack *st, int pr, void *arg)
3129{
3130 int i, cr;
3131 struct l3_process *proc;
3132 struct Channel *chan;
3133
3134 if ((DL_ESTABLISH | REQUEST) == pr) {
3135 l3_msg(st, pr, NULL);
3136 return;
3137 } else if (((CC_SETUP | REQUEST) == pr) || ((CC_RESUME | REQUEST) == pr)) {
3138 chan = arg;
3139 cr = newcallref();
3140 cr |= 0x80;
3141 if ((proc = dss1_new_l3_process(st, cr))) {
3142 proc->chan = chan;
3143 chan->proc = proc;
3144 memcpy(&proc->para.setup, &chan->setup, sizeof(setup_parm));
3145 proc->callref = cr;
3146 }
3147 } else {
3148 proc = arg;
3149 }
3150 if (!proc) {
3151 printk(KERN_ERR "HiSax dss1down without proc pr=%04x\n", pr);
3152 return;
3153 }
3154
3155 if ( pr == (CC_TDSS1_IO | REQUEST)) {
3156 l3dss1_io_timer(proc); /* timer expires */
3157 return;
3158 }
3159
3160 for (i = 0; i < DOWNSLLEN; i++)
3161 if ((pr == downstatelist[i].primitive) &&
3162 ((1 << proc->state) & downstatelist[i].state))
3163 break;
3164 if (i == DOWNSLLEN) {
3165 if (st->l3.debug & L3_DEB_STATE) {
3166 l3_debug(st, "dss1down state %d prim %#x unhandled",
3167 proc->state, pr);
3168 }
3169 } else {
3170 if (st->l3.debug & L3_DEB_STATE) {
3171 l3_debug(st, "dss1down state %d prim %#x",
3172 proc->state, pr);
3173 }
3174 downstatelist[i].rout(proc, pr, arg);
3175 }
3176}
3177
3178static void
3179dss1man(struct PStack *st, int pr, void *arg)
3180{
3181 int i;
3182 struct l3_process *proc = arg;
3183
3184 if (!proc) {
3185 printk(KERN_ERR "HiSax dss1man without proc pr=%04x\n", pr);
3186 return;
3187 }
3188 for (i = 0; i < MANSLLEN; i++)
3189 if ((pr == manstatelist[i].primitive) &&
3190 ((1 << proc->state) & manstatelist[i].state))
3191 break;
3192 if (i == MANSLLEN) {
3193 if (st->l3.debug & L3_DEB_STATE) {
3194 l3_debug(st, "cr %d dss1man state %d prim %#x unhandled",
3195 proc->callref & 0x7f, proc->state, pr);
3196 }
3197 } else {
3198 if (st->l3.debug & L3_DEB_STATE) {
3199 l3_debug(st, "cr %d dss1man state %d prim %#x",
3200 proc->callref & 0x7f, proc->state, pr);
3201 }
3202 manstatelist[i].rout(proc, pr, arg);
3203 }
3204}
3205
3206void
3207setstack_dss1(struct PStack *st)
3208{
3209 char tmp[64];
3210 int i;
3211
3212 st->lli.l4l3 = dss1down;
3213 st->lli.l4l3_proto = l3dss1_cmd_global;
3214 st->l2.l2l3 = dss1up;
3215 st->l3.l3ml3 = dss1man;
3216 st->l3.N303 = 1;
3217 st->prot.dss1.last_invoke_id = 0;
3218 st->prot.dss1.invoke_used[0] = 1; /* Bit 0 must always be set to 1 */
3219 i = 1;
3220 while (i < 32)
3221 st->prot.dss1.invoke_used[i++] = 0;
3222
3223 if (!(st->l3.global = kmalloc(sizeof(struct l3_process), GFP_ATOMIC))) {
3224 printk(KERN_ERR "HiSax can't get memory for dss1 global CR\n");
3225 } else {
3226 st->l3.global->state = 0;
3227 st->l3.global->callref = 0;
3228 st->l3.global->next = NULL;
3229 st->l3.global->debug = L3_DEB_WARN;
3230 st->l3.global->st = st;
3231 st->l3.global->N303 = 1;
3232 st->l3.global->prot.dss1.invoke_id = 0;
3233
3234 L3InitTimer(st->l3.global, &st->l3.global->timer);
3235 }
3236 strcpy(tmp, dss1_revision);
3237 printk(KERN_INFO "HiSax: DSS1 Rev. %s\n", HiSax_getrev(tmp));
3238}