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[net-next-2.6.git] / drivers / isdn / gigaset / capi.c
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7bb5fdc2
TS		 1/*
2 * Kernel CAPI interface for the Gigaset driver
3 *
4 * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
5 *
6 * =====================================================================
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 * =====================================================================
12 */
13
14#include "gigaset.h"
15#include <linux/ctype.h>
16#include <linux/isdn/capilli.h>
17#include <linux/isdn/capicmd.h>
18#include <linux/isdn/capiutil.h>
19
20/* missing from kernelcapi.h */
21#define CapiNcpiNotSupportedByProtocol 0x0001
22#define CapiFlagsNotSupportedByProtocol 0x0002
23#define CapiAlertAlreadySent 0x0003
24#define CapiFacilitySpecificFunctionNotSupported 0x3011
25
26/* missing from capicmd.h */
27#define CAPI_CONNECT_IND_BASELEN (CAPI_MSG_BASELEN+4+2+8*1)
28#define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+3*1)
29#define CAPI_CONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
30#define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
31#define CAPI_DATA_B3_REQ_LEN64 (CAPI_MSG_BASELEN+4+4+2+2+2+8)
32#define CAPI_DATA_B3_CONF_LEN (CAPI_MSG_BASELEN+4+2+2)
33#define CAPI_DISCONNECT_IND_LEN (CAPI_MSG_BASELEN+4+2)
34#define CAPI_DISCONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+2+1)
35#define CAPI_FACILITY_CONF_BASELEN (CAPI_MSG_BASELEN+4+2+2+1)
36/* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
37#define CAPI_STDCONF_LEN (CAPI_MSG_BASELEN+4+2)
38
39#define CAPI_FACILITY_HANDSET 0x0000
40#define CAPI_FACILITY_DTMF 0x0001
41#define CAPI_FACILITY_V42BIS 0x0002
42#define CAPI_FACILITY_SUPPSVC 0x0003
43#define CAPI_FACILITY_WAKEUP 0x0004
44#define CAPI_FACILITY_LI 0x0005
45
46#define CAPI_SUPPSVC_GETSUPPORTED 0x0000
47
48/* missing from capiutil.h */
49#define CAPIMSG_PLCI_PART(m) CAPIMSG_U8(m, 9)
50#define CAPIMSG_NCCI_PART(m) CAPIMSG_U16(m, 10)
51#define CAPIMSG_HANDLE_REQ(m) CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
52#define CAPIMSG_FLAGS(m) CAPIMSG_U16(m, 20)
53#define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
54#define CAPIMSG_SETPLCI_PART(m, plci) capimsg_setu8(m, 9, plci)
55#define CAPIMSG_SETNCCI_PART(m, ncci) capimsg_setu16(m, 10, ncci)
56#define CAPIMSG_SETFLAGS(m, flags) capimsg_setu16(m, 20, flags)
57
58/* parameters with differing location in DATA_B3_CONF/_RESP: */
59#define CAPIMSG_SETHANDLE_CONF(m, handle) capimsg_setu16(m, 12, handle)
60#define CAPIMSG_SETINFO_CONF(m, info) capimsg_setu16(m, 14, info)
61
62/* Flags (DATA_B3_REQ/_IND) */
63#define CAPI_FLAGS_DELIVERY_CONFIRMATION 0x04
64#define CAPI_FLAGS_RESERVED (~0x1f)
65
66/* buffer sizes */
67#define MAX_BC_OCTETS 11
68#define MAX_HLC_OCTETS 3
69#define MAX_NUMBER_DIGITS 20
70#define MAX_FMT_IE_LEN 20
71
72/* values for gigaset_capi_appl.connected */
73#define APCONN_NONE 0 /* inactive/listening */
74#define APCONN_SETUP 1 /* connecting */
75#define APCONN_ACTIVE 2 /* B channel up */
76
77/* registered application data structure */
78struct gigaset_capi_appl {
79 struct list_head ctrlist;
80 struct gigaset_capi_appl *bcnext;
81 u16 id;
82 u16 nextMessageNumber;
83 u32 listenInfoMask;
84 u32 listenCIPmask;
85 int connected;
86};
87
88/* CAPI specific controller data structure */
89struct gigaset_capi_ctr {
90 struct capi_ctr ctr;
91 struct list_head appls;
92 struct sk_buff_head sendqueue;
93 atomic_t sendqlen;
94 /* two _cmsg structures possibly used concurrently: */
95 _cmsg hcmsg; /* for message composition triggered from hardware */
96 _cmsg acmsg; /* for dissection of messages sent from application */
97 u8 bc_buf[MAX_BC_OCTETS+1];
98 u8 hlc_buf[MAX_HLC_OCTETS+1];
99 u8 cgpty_buf[MAX_NUMBER_DIGITS+3];
100 u8 cdpty_buf[MAX_NUMBER_DIGITS+2];
101};
102
103/* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
104static struct {
105 u8 *bc;
106 u8 *hlc;
107} cip2bchlc[] = {
108 [1] = { "8090A3", NULL },
109 /* Speech (A-law) */
110 [2] = { "8890", NULL },
111 /* Unrestricted digital information */
112 [3] = { "8990", NULL },
113 /* Restricted digital information */
114 [4] = { "9090A3", NULL },
115 /* 3,1 kHz audio (A-law) */
116 [5] = { "9190", NULL },
117 /* 7 kHz audio */
118 [6] = { "9890", NULL },
119 /* Video */
120 [7] = { "88C0C6E6", NULL },
121 /* Packet mode */
122 [8] = { "8890218F", NULL },
123 /* 56 kbit/s rate adaptation */
124 [9] = { "9190A5", NULL },
125 /* Unrestricted digital information with tones/announcements */
126 [16] = { "8090A3", "9181" },
127 /* Telephony */
128 [17] = { "9090A3", "9184" },
129 /* Group 2/3 facsimile */
130 [18] = { "8890", "91A1" },
131 /* Group 4 facsimile Class 1 */
132 [19] = { "8890", "91A4" },
133 /* Teletex service basic and mixed mode
134 and Group 4 facsimile service Classes II and III */
135 [20] = { "8890", "91A8" },
136 /* Teletex service basic and processable mode */
137 [21] = { "8890", "91B1" },
138 /* Teletex service basic mode */
139 [22] = { "8890", "91B2" },
140 /* International interworking for Videotex */
141 [23] = { "8890", "91B5" },
142 /* Telex */
143 [24] = { "8890", "91B8" },
144 /* Message Handling Systems in accordance with X.400 */
145 [25] = { "8890", "91C1" },
146 /* OSI application in accordance with X.200 */
147 [26] = { "9190A5", "9181" },
148 /* 7 kHz telephony */
149 [27] = { "9190A5", "916001" },
150 /* Video telephony, first connection */
151 [28] = { "8890", "916002" },
152 /* Video telephony, second connection */
153};
154
155/*
156 * helper functions
157 * ================
158 */
159
160/*
161 * emit unsupported parameter warning
162 */
163static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
164 char *msgname, char *paramname)
165{
166 if (param && *param)
167 dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
168 msgname, paramname);
169}
170
7bb5fdc2
TS		 171/*
172 * check for legal hex digit
173 */
174static inline int ishexdigit(char c)
175{
176 if (c >= '0' && c <= '9')
177 return 1;
178 if (c >= 'A' && c <= 'F')
179 return 1;
180 if (c >= 'a' && c <= 'f')
181 return 1;
182 return 0;
183}
184
185/*
186 * convert hex to binary
187 */
188static inline u8 hex2bin(char c)
189{
190 int result = c & 0x0f;
191 if (c & 0x40)
192 result += 9;
193 return result;
194}
195
196/*
197 * convert an IE from Gigaset hex string to ETSI binary representation
198 * including length byte
199 * return value: result length, -1 on error
200 */
201static int encode_ie(char *in, u8 *out, int maxlen)
202{
203 int l = 0;
204 while (*in) {
205 if (!ishexdigit(in[0]) || !ishexdigit(in[1]) || l >= maxlen)
206 return -1;
207 out[++l] = (hex2bin(in[0]) << 4) + hex2bin(in[1]);
208 in += 2;
209 }
210 out[0] = l;
211 return l;
212}
213
214/*
215 * convert an IE from ETSI binary representation including length byte
216 * to Gigaset hex string
217 */
218static void decode_ie(u8 *in, char *out)
219{
220 int i = *in;
221 while (i-- > 0) {
222 /* ToDo: conversion to upper case necessary? */
223 *out++ = toupper(hex_asc_hi(*++in));
224 *out++ = toupper(hex_asc_lo(*in));
225 }
226}
227
228/*
229 * retrieve application data structure for an application ID
230 */
231static inline struct gigaset_capi_appl *
232get_appl(struct gigaset_capi_ctr *iif, u16 appl)
233{
234 struct gigaset_capi_appl *ap;
235
236 list_for_each_entry(ap, &iif->appls, ctrlist)
237 if (ap->id == appl)
238 return ap;
239 return NULL;
240}
241
242/*
243 * dump CAPI message to kernel messages for debugging
244 */
245static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
246{
247#ifdef CONFIG_GIGASET_DEBUG
248 _cdebbuf *cdb;
249
250 if (!(gigaset_debuglevel & level))
251 return;
252
253 cdb = capi_cmsg2str(p);
254 if (cdb) {
255 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
256 cdebbuf_free(cdb);
257 } else {
258 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
259 capi_cmd2str(p->Command, p->Subcommand));
260 }
261#endif
262}
263
264static inline void dump_rawmsg(enum debuglevel level, const char *tag,
265 unsigned char *data)
266{
267#ifdef CONFIG_GIGASET_DEBUG
268 char *dbgline;
269 int i, l;
270
271 if (!(gigaset_debuglevel & level))
272 return;
273
274 l = CAPIMSG_LEN(data);
275 if (l < 12) {
276 gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
277 return;
278 }
279 gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
280 tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
281 CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
282 CAPIMSG_CONTROL(data));
283 l -= 12;
284 dbgline = kmalloc(3*l, GFP_ATOMIC);
285 if (!dbgline)
286 return;
287 for (i = 0; i < l; i++) {
288 dbgline[3*i] = hex_asc_hi(data[12+i]);
289 dbgline[3*i+1] = hex_asc_lo(data[12+i]);
290 dbgline[3*i+2] = ' ';
291 }
292 dbgline[3*l-1] = '\0';
293 gig_dbg(level, " %s", dbgline);
294 kfree(dbgline);
295 if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
296 (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
297 CAPIMSG_SUBCOMMAND(data) == CAPI_IND) &&
298 CAPIMSG_DATALEN(data) > 0) {
299 l = CAPIMSG_DATALEN(data);
300 dbgline = kmalloc(3*l, GFP_ATOMIC);
301 if (!dbgline)
302 return;
303 data += CAPIMSG_LEN(data);
304 for (i = 0; i < l; i++) {
305 dbgline[3*i] = hex_asc_hi(data[i]);
306 dbgline[3*i+1] = hex_asc_lo(data[i]);
307 dbgline[3*i+2] = ' ';
308 }
309 dbgline[3*l-1] = '\0';
310 gig_dbg(level, " %s", dbgline);
311 kfree(dbgline);
312 }
313#endif
314}
315
316/*
317 * format CAPI IE as string
318 */
319
320static const char *format_ie(const char *ie)
321{
322 static char result[3*MAX_FMT_IE_LEN];
323 int len, count;
324 char *pout = result;
325
326 if (!ie)
327 return "NULL";
328
329 count = len = ie[0];
330 if (count > MAX_FMT_IE_LEN)
331 count = MAX_FMT_IE_LEN-1;
332 while (count--) {
333 *pout++ = hex_asc_hi(*++ie);
334 *pout++ = hex_asc_lo(*ie);
335 *pout++ = ' ';
336 }
337 if (len > MAX_FMT_IE_LEN) {
338 *pout++ = '.';
339 *pout++ = '.';
340 *pout++ = '.';
341 }
342 *--pout = 0;
343 return result;
344}
345
346
347/*
348 * driver interface functions
349 * ==========================
350 */
351
352/**
353 * gigaset_skb_sent() - acknowledge transmission of outgoing skb
354 * @bcs: B channel descriptor structure.
355 * @skb: sent data.
356 *
357 * Called by hardware module {bas,ser,usb}_gigaset when the data in a
358 * skb has been successfully sent, for signalling completion to the LL.
359 */
360void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
361{
362 struct cardstate *cs = bcs->cs;
363 struct gigaset_capi_ctr *iif = cs->iif;
364 struct gigaset_capi_appl *ap = bcs->ap;
4dd8230a 365 unsigned char *req = skb_mac_header(dskb);
7bb5fdc2
TS		 366 struct sk_buff *cskb;
367 u16 flags;
368
369 /* update statistics */
370 ++bcs->trans_up;
371
372 if (!ap) {
373 dev_err(cs->dev, "%s: no application\n", __func__);
374 return;
375 }
376
377 /* don't send further B3 messages if disconnected */
378 if (ap->connected < APCONN_ACTIVE) {
379 gig_dbg(DEBUG_LLDATA, "disconnected, discarding ack");
380 return;
381 }
382
383 /* ToDo: honor unset "delivery confirmation" bit */
4dd8230a 384 flags = CAPIMSG_FLAGS(req);
7bb5fdc2
TS		 385
386 /* build DATA_B3_CONF message */
387 cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
388 if (!cskb) {
389 dev_err(cs->dev, "%s: out of memory\n", __func__);
390 return;
391 }
392 /* frequent message, avoid _cmsg overhead */
393 CAPIMSG_SETLEN(cskb->data, CAPI_DATA_B3_CONF_LEN);
394 CAPIMSG_SETAPPID(cskb->data, ap->id);
395 CAPIMSG_SETCOMMAND(cskb->data, CAPI_DATA_B3);
396 CAPIMSG_SETSUBCOMMAND(cskb->data, CAPI_CONF);
4dd8230a 397 CAPIMSG_SETMSGID(cskb->data, CAPIMSG_MSGID(req));
7bb5fdc2
TS		 398 CAPIMSG_SETCONTROLLER(cskb->data, iif->ctr.cnr);
399 CAPIMSG_SETPLCI_PART(cskb->data, bcs->channel + 1);
400 CAPIMSG_SETNCCI_PART(cskb->data, 1);
4dd8230a 401 CAPIMSG_SETHANDLE_CONF(cskb->data, CAPIMSG_HANDLE_REQ(req));
7bb5fdc2
TS		 402 if (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION)
403 CAPIMSG_SETINFO_CONF(cskb->data,
404 CapiFlagsNotSupportedByProtocol);
405 else
406 CAPIMSG_SETINFO_CONF(cskb->data, CAPI_NOERROR);
407
408 /* emit message */
409 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_CONF", cskb->data);
410 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
411}
412EXPORT_SYMBOL_GPL(gigaset_skb_sent);
413
414/**
415 * gigaset_skb_rcvd() - pass received skb to LL
416 * @bcs: B channel descriptor structure.
417 * @skb: received data.
418 *
419 * Called by hardware module {bas,ser,usb}_gigaset when user data has
420 * been successfully received, for passing to the LL.
421 * Warning: skb must not be accessed anymore!
422 */
423void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
424{
425 struct cardstate *cs = bcs->cs;
426 struct gigaset_capi_ctr *iif = cs->iif;
427 struct gigaset_capi_appl *ap = bcs->ap;
428 int len = skb->len;
429
430 /* update statistics */
431 bcs->trans_down++;
432
433 if (!ap) {
434 dev_err(cs->dev, "%s: no application\n", __func__);
435 return;
436 }
437
438 /* don't send further B3 messages if disconnected */
439 if (ap->connected < APCONN_ACTIVE) {
440 gig_dbg(DEBUG_LLDATA, "disconnected, discarding data");
4dd8230a 441 dev_kfree_skb_any(skb);
7bb5fdc2
TS		 442 return;
443 }
444
445 /*
446 * prepend DATA_B3_IND message to payload
447 * Parameters: NCCI = 1, all others 0/unused
448 * frequent message, avoid _cmsg overhead
449 */
450 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
451 CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
452 CAPIMSG_SETAPPID(skb->data, ap->id);
453 CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
454 CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
455 CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
456 CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
457 CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
458 CAPIMSG_SETNCCI_PART(skb->data, 1);
459 /* Data parameter not used */
460 CAPIMSG_SETDATALEN(skb->data, len);
461 /* Data handle parameter not used */
462 CAPIMSG_SETFLAGS(skb->data, 0);
463 /* Data64 parameter not present */
464
465 /* emit message */
466 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_IND", skb->data);
467 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
468}
469EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
470
471/**
472 * gigaset_isdn_rcv_err() - signal receive error
473 * @bcs: B channel descriptor structure.
474 *
475 * Called by hardware module {bas,ser,usb}_gigaset when a receive error
476 * has occurred, for signalling to the LL.
477 */
478void gigaset_isdn_rcv_err(struct bc_state *bcs)
479{
480 /* if currently ignoring packets, just count down */
481 if (bcs->ignore) {
482 bcs->ignore--;
483 return;
484 }
485
486 /* update statistics */
487 bcs->corrupted++;
488
489 /* ToDo: signal error -> LL */
490}
491EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
492
493/**
494 * gigaset_isdn_icall() - signal incoming call
495 * @at_state: connection state structure.
496 *
497 * Called by main module at tasklet level to notify the LL that an incoming
498 * call has been received. @at_state contains the parameters of the call.
499 *
500 * Return value: call disposition (ICALL_*)
501 */
502int gigaset_isdn_icall(struct at_state_t *at_state)
503{
504 struct cardstate *cs = at_state->cs;
505 struct bc_state *bcs = at_state->bcs;
506 struct gigaset_capi_ctr *iif = cs->iif;
507 struct gigaset_capi_appl *ap;
508 u32 actCIPmask;
509 struct sk_buff *skb;
510 unsigned int msgsize;
511 int i;
512
513 /*
514 * ToDo: signal calls without a free B channel, too
515 * (requires a u8 handle for the at_state structure that can
516 * be stored in the PLCI and used in the CONNECT_RESP message
517 * handler to retrieve it)
518 */
519 if (!bcs)
520 return ICALL_IGNORE;
521
522 /* prepare CONNECT_IND message, using B channel number as PLCI */
523 capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
524 iif->ctr.cnr | ((bcs->channel + 1) << 8));
525
526 /* minimum size, all structs empty */
527 msgsize = CAPI_CONNECT_IND_BASELEN;
528
529 /* Bearer Capability (mandatory) */
530 if (at_state->str_var[STR_ZBC]) {
531 /* pass on BC from Gigaset */
532 if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
533 MAX_BC_OCTETS) < 0) {
534 dev_warn(cs->dev, "RING ignored - bad BC %s\n",
535 at_state->str_var[STR_ZBC]);
536 return ICALL_IGNORE;
537 }
538
539 /* look up corresponding CIP value */
540 iif->hcmsg.CIPValue = 0; /* default if nothing found */
541 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
542 if (cip2bchlc[i].bc != NULL &&
543 cip2bchlc[i].hlc == NULL &&
544 !strcmp(cip2bchlc[i].bc,
545 at_state->str_var[STR_ZBC])) {
546 iif->hcmsg.CIPValue = i;
547 break;
548 }
549 } else {
550 /* no BC (internal call): assume CIP 1 (speech, A-law) */
551 iif->hcmsg.CIPValue = 1;
552 encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
553 }
554 iif->hcmsg.BC = iif->bc_buf;
555 msgsize += iif->hcmsg.BC[0];
556
557 /* High Layer Compatibility (optional) */
558 if (at_state->str_var[STR_ZHLC]) {
559 /* pass on HLC from Gigaset */
560 if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
561 MAX_HLC_OCTETS) < 0) {
562 dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
563 at_state->str_var[STR_ZHLC]);
564 return ICALL_IGNORE;
565 }
566 iif->hcmsg.HLC = iif->hlc_buf;
567 msgsize += iif->hcmsg.HLC[0];
568
569 /* look up corresponding CIP value */
570 /* keep BC based CIP value if none found */
571 if (at_state->str_var[STR_ZBC])
572 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
573 if (cip2bchlc[i].hlc != NULL &&
574 !strcmp(cip2bchlc[i].hlc,
575 at_state->str_var[STR_ZHLC]) &&
576 !strcmp(cip2bchlc[i].bc,
577 at_state->str_var[STR_ZBC])) {
578 iif->hcmsg.CIPValue = i;
579 break;
580 }
581 }
582
583 /* Called Party Number (optional) */
584 if (at_state->str_var[STR_ZCPN]) {
585 i = strlen(at_state->str_var[STR_ZCPN]);
586 if (i > MAX_NUMBER_DIGITS) {
587 dev_warn(cs->dev, "RING ignored - bad number %s\n",
588 at_state->str_var[STR_ZBC]);
589 return ICALL_IGNORE;
590 }
591 iif->cdpty_buf[0] = i + 1;
592 iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
593 memcpy(iif->cdpty_buf+2, at_state->str_var[STR_ZCPN], i);
594 iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
595 msgsize += iif->hcmsg.CalledPartyNumber[0];
596 }
597
598 /* Calling Party Number (optional) */
599 if (at_state->str_var[STR_NMBR]) {
600 i = strlen(at_state->str_var[STR_NMBR]);
601 if (i > MAX_NUMBER_DIGITS) {
602 dev_warn(cs->dev, "RING ignored - bad number %s\n",
603 at_state->str_var[STR_ZBC]);
604 return ICALL_IGNORE;
605 }
606 iif->cgpty_buf[0] = i + 2;
607 iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
608 iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
609 memcpy(iif->cgpty_buf+3, at_state->str_var[STR_NMBR], i);
610 iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
611 msgsize += iif->hcmsg.CallingPartyNumber[0];
612 }
613
614 /* remaining parameters (not supported, always left NULL):
615 * - CalledPartySubaddress
616 * - CallingPartySubaddress
617 * - AdditionalInfo
618 * - BChannelinformation
619 * - Keypadfacility
620 * - Useruserdata
621 * - Facilitydataarray
622 */
623
624 gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
625 iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
626 format_ie(iif->hcmsg.BC));
627 gig_dbg(DEBUG_CMD, "icall: HLC %s",
628 format_ie(iif->hcmsg.HLC));
629 gig_dbg(DEBUG_CMD, "icall: CgPty %s",
630 format_ie(iif->hcmsg.CallingPartyNumber));
631 gig_dbg(DEBUG_CMD, "icall: CdPty %s",
632 format_ie(iif->hcmsg.CalledPartyNumber));
633
634 /* scan application list for matching listeners */
635 bcs->ap = NULL;
636 actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
637 list_for_each_entry(ap, &iif->appls, ctrlist)
638 if (actCIPmask & ap->listenCIPmask) {
639 /* build CONNECT_IND message for this application */
640 iif->hcmsg.ApplId = ap->id;
641 iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
642
643 skb = alloc_skb(msgsize, GFP_ATOMIC);
644 if (!skb) {
645 dev_err(cs->dev, "%s: out of memory\n",
646 __func__);
647 break;
648 }
649 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
650 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
651
652 /* add to listeners on this B channel, update state */
653 ap->bcnext = bcs->ap;
654 bcs->ap = ap;
655 bcs->chstate |= CHS_NOTIFY_LL;
656 ap->connected = APCONN_SETUP;
657
658 /* emit message */
659 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
660 }
661
662 /*
663 * Return "accept" if any listeners.
664 * Gigaset will send ALERTING.
665 * There doesn't seem to be a way to avoid this.
666 */
667 return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
668}
669
670/*
671 * send a DISCONNECT_IND message to an application
672 * does not sleep, clobbers the controller's hcmsg structure
673 */
674static void send_disconnect_ind(struct bc_state *bcs,
675 struct gigaset_capi_appl *ap, u16 reason)
676{
677 struct cardstate *cs = bcs->cs;
678 struct gigaset_capi_ctr *iif = cs->iif;
679 struct sk_buff *skb;
680
681 if (ap->connected == APCONN_NONE)
682 return;
683
684 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
685 ap->nextMessageNumber++,
686 iif->ctr.cnr | ((bcs->channel + 1) << 8));
687 iif->hcmsg.Reason = reason;
688 skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
689 if (!skb) {
690 dev_err(cs->dev, "%s: out of memory\n", __func__);
691 return;
692 }
693 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
694 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
695 ap->connected = APCONN_NONE;
696 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
697}
698
699/*
700 * send a DISCONNECT_B3_IND message to an application
701 * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
702 * does not sleep, clobbers the controller's hcmsg structure
703 */
704static void send_disconnect_b3_ind(struct bc_state *bcs,
705 struct gigaset_capi_appl *ap)
706{
707 struct cardstate *cs = bcs->cs;
708 struct gigaset_capi_ctr *iif = cs->iif;
709 struct sk_buff *skb;
710
711 /* nothing to do if no logical connection active */
712 if (ap->connected < APCONN_ACTIVE)
713 return;
714 ap->connected = APCONN_SETUP;
715
716 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
717 ap->nextMessageNumber++,
718 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
719 skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
720 if (!skb) {
721 dev_err(cs->dev, "%s: out of memory\n", __func__);
722 return;
723 }
724 capi_cmsg2message(&iif->hcmsg,
725 __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
726 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
727 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
728}
729
730/**
731 * gigaset_isdn_connD() - signal D channel connect
732 * @bcs: B channel descriptor structure.
733 *
734 * Called by main module at tasklet level to notify the LL that the D channel
735 * connection has been established.
736 */
737void gigaset_isdn_connD(struct bc_state *bcs)
738{
739 struct cardstate *cs = bcs->cs;
740 struct gigaset_capi_ctr *iif = cs->iif;
741 struct gigaset_capi_appl *ap = bcs->ap;
742 struct sk_buff *skb;
743 unsigned int msgsize;
744
745 if (!ap) {
746 dev_err(cs->dev, "%s: no application\n", __func__);
747 return;
748 }
749 while (ap->bcnext) {
750 /* this should never happen */
751 dev_warn(cs->dev, "%s: dropping extra application %u\n",
752 __func__, ap->bcnext->id);
753 send_disconnect_ind(bcs, ap->bcnext,
754 CapiCallGivenToOtherApplication);
755 ap->bcnext = ap->bcnext->bcnext;
756 }
757 if (ap->connected == APCONN_NONE) {
758 dev_warn(cs->dev, "%s: application %u not connected\n",
759 __func__, ap->id);
760 return;
761 }
762
763 /* prepare CONNECT_ACTIVE_IND message
764 * Note: LLC not supported by device
765 */
766 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
767 ap->nextMessageNumber++,
768 iif->ctr.cnr | ((bcs->channel + 1) << 8));
769
770 /* minimum size, all structs empty */
771 msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
772
773 /* ToDo: set parameter: Connected number
774 * (requires ev-layer state machine extension to collect
775 * ZCON device reply)
776 */
777
778 /* build and emit CONNECT_ACTIVE_IND message */
779 skb = alloc_skb(msgsize, GFP_ATOMIC);
780 if (!skb) {
781 dev_err(cs->dev, "%s: out of memory\n", __func__);
782 return;
783 }
784 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
785 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
786 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
787}
788
789/**
790 * gigaset_isdn_hupD() - signal D channel hangup
791 * @bcs: B channel descriptor structure.
792 *
793 * Called by main module at tasklet level to notify the LL that the D channel
794 * connection has been shut down.
795 */
796void gigaset_isdn_hupD(struct bc_state *bcs)
797{
798 struct gigaset_capi_appl *ap;
799
800 /*
801 * ToDo: pass on reason code reported by device
802 * (requires ev-layer state machine extension to collect
803 * ZCAU device reply)
804 */
805 for (ap = bcs->ap; ap != NULL; ap = ap->bcnext) {
806 send_disconnect_b3_ind(bcs, ap);
807 send_disconnect_ind(bcs, ap, 0);
808 }
809 bcs->ap = NULL;
810}
811
812/**
813 * gigaset_isdn_connB() - signal B channel connect
814 * @bcs: B channel descriptor structure.
815 *
816 * Called by main module at tasklet level to notify the LL that the B channel
817 * connection has been established.
818 */
819void gigaset_isdn_connB(struct bc_state *bcs)
820{
821 struct cardstate *cs = bcs->cs;
822 struct gigaset_capi_ctr *iif = cs->iif;
823 struct gigaset_capi_appl *ap = bcs->ap;
824 struct sk_buff *skb;
825 unsigned int msgsize;
826 u8 command;
827
828 if (!ap) {
829 dev_err(cs->dev, "%s: no application\n", __func__);
830 return;
831 }
832 while (ap->bcnext) {
833 /* this should never happen */
834 dev_warn(cs->dev, "%s: dropping extra application %u\n",
835 __func__, ap->bcnext->id);
836 send_disconnect_ind(bcs, ap->bcnext,
837 CapiCallGivenToOtherApplication);
838 ap->bcnext = ap->bcnext->bcnext;
839 }
840 if (!ap->connected) {
841 dev_warn(cs->dev, "%s: application %u not connected\n",
842 __func__, ap->id);
843 return;
844 }
845
846 /*
847 * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
848 * otherwise we have to emit CONNECT_B3_IND first, and follow up with
849 * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
850 * Parameters in both cases always: NCCI = 1, NCPI empty
851 */
852 if (ap->connected >= APCONN_ACTIVE) {
853 command = CAPI_CONNECT_B3_ACTIVE;
854 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
855 } else {
856 command = CAPI_CONNECT_B3;
857 msgsize = CAPI_CONNECT_B3_IND_BASELEN;
858 }
859 capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
860 ap->nextMessageNumber++,
861 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
862 skb = alloc_skb(msgsize, GFP_ATOMIC);
863 if (!skb) {
864 dev_err(cs->dev, "%s: out of memory\n", __func__);
865 return;
866 }
867 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
868 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
869 ap->connected = APCONN_ACTIVE;
870 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
871}
872
873/**
874 * gigaset_isdn_hupB() - signal B channel hangup
875 * @bcs: B channel descriptor structure.
876 *
877 * Called by main module to notify the LL that the B channel connection has
878 * been shut down.
879 */
880void gigaset_isdn_hupB(struct bc_state *bcs)
881{
882 struct cardstate *cs = bcs->cs;
883 struct gigaset_capi_appl *ap = bcs->ap;
884
885 /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
886
887 if (!ap) {
888 dev_err(cs->dev, "%s: no application\n", __func__);
889 return;
890 }
891
892 send_disconnect_b3_ind(bcs, ap);
893}
894
895/**
896 * gigaset_isdn_start() - signal device availability
897 * @cs: device descriptor structure.
898 *
899 * Called by main module to notify the LL that the device is available for
900 * use.
901 */
902void gigaset_isdn_start(struct cardstate *cs)
903{
904 struct gigaset_capi_ctr *iif = cs->iif;
905
906 /* fill profile data: manufacturer name */
907 strcpy(iif->ctr.manu, "Siemens");
908 /* CAPI and device version */
909 iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
910 iif->ctr.version.minorversion = 0;
911 /* ToDo: check/assert cs->gotfwver? */
912 iif->ctr.version.majormanuversion = cs->fwver[0];
913 iif->ctr.version.minormanuversion = cs->fwver[1];
914 /* number of B channels supported */
915 iif->ctr.profile.nbchannel = cs->channels;
916 /* global options: internal controller, supplementary services */
917 iif->ctr.profile.goptions = 0x11;
918 /* B1 protocols: 64 kbit/s HDLC or transparent */
919 iif->ctr.profile.support1 = 0x03;
920 /* B2 protocols: transparent only */
921 /* ToDo: X.75 SLP ? */
922 iif->ctr.profile.support2 = 0x02;
923 /* B3 protocols: transparent only */
924 iif->ctr.profile.support3 = 0x01;
925 /* no serial number */
926 strcpy(iif->ctr.serial, "0");
927 capi_ctr_ready(&iif->ctr);
928}
929
930/**
931 * gigaset_isdn_stop() - signal device unavailability
932 * @cs: device descriptor structure.
933 *
934 * Called by main module to notify the LL that the device is no longer
935 * available for use.
936 */
937void gigaset_isdn_stop(struct cardstate *cs)
938{
939 struct gigaset_capi_ctr *iif = cs->iif;
940 capi_ctr_down(&iif->ctr);
941}
942
943/*
944 * kernel CAPI callback methods
945 * ============================
946 */
947
948/*
949 * load firmware
950 */
951static int gigaset_load_firmware(struct capi_ctr *ctr, capiloaddata *data)
952{
953 struct cardstate *cs = ctr->driverdata;
954
955 /* AVM specific operation, not needed for Gigaset -- ignore */
956 dev_notice(cs->dev, "load_firmware ignored\n");
957
958 return 0;
959}
960
961/*
962 * reset (deactivate) controller
963 */
964static void gigaset_reset_ctr(struct capi_ctr *ctr)
965{
966 struct cardstate *cs = ctr->driverdata;
967
968 /* AVM specific operation, not needed for Gigaset -- ignore */
969 dev_notice(cs->dev, "reset_ctr ignored\n");
970}
971
972/*
973 * register CAPI application
974 */
975static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
976 capi_register_params *rp)
977{
978 struct gigaset_capi_ctr *iif
979 = container_of(ctr, struct gigaset_capi_ctr, ctr);
980 struct cardstate *cs = ctr->driverdata;
981 struct gigaset_capi_appl *ap;
982
983 list_for_each_entry(ap, &iif->appls, ctrlist)
984 if (ap->id == appl) {
985 dev_notice(cs->dev,
986 "application %u already registered\n", appl);
987 return;
988 }
989
990 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
991 if (!ap) {
992 dev_err(cs->dev, "%s: out of memory\n", __func__);
993 return;
994 }
995 ap->id = appl;
996
997 list_add(&ap->ctrlist, &iif->appls);
998}
999
1000/*
1001 * release CAPI application
1002 */
1003static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
1004{
1005 struct gigaset_capi_ctr *iif
1006 = container_of(ctr, struct gigaset_capi_ctr, ctr);
1007 struct cardstate *cs = iif->ctr.driverdata;
1008 struct gigaset_capi_appl *ap, *tmp;
1009
1010 list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
1011 if (ap->id == appl) {
1012 if (ap->connected != APCONN_NONE) {
1013 dev_err(cs->dev,
1014 "%s: application %u still connected\n",
1015 __func__, ap->id);
1016 /* ToDo: clear active connection */
1017 }
1018 list_del(&ap->ctrlist);
1019 kfree(ap);
1020 }
1021
1022}
1023
1024/*
1025 * =====================================================================
1026 * outgoing CAPI message handler
1027 * =====================================================================
1028 */
1029
1030/*
1031 * helper function: emit reply message with given Info value
1032 */
1033static void send_conf(struct gigaset_capi_ctr *iif,
1034 struct gigaset_capi_appl *ap,
1035 struct sk_buff *skb,
1036 u16 info)
1037{
1038 /*
1039 * _CONF replies always only have NCCI and Info parameters
1040 * so they'll fit into the _REQ message skb
1041 */
1042 capi_cmsg_answer(&iif->acmsg);
1043 iif->acmsg.Info = info;
1044 capi_cmsg2message(&iif->acmsg, skb->data);
1045 __skb_trim(skb, CAPI_STDCONF_LEN);
1046 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1047 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1048}
1049
1050/*
1051 * process FACILITY_REQ message
1052 */
1053static void do_facility_req(struct gigaset_capi_ctr *iif,
1054 struct gigaset_capi_appl *ap,
1055 struct sk_buff *skb)
1056{
1057 struct cardstate *cs = iif->ctr.driverdata;
6c911916 1058 _cmsg *cmsg = &iif->acmsg;
7bb5fdc2
TS		 1059 struct sk_buff *cskb;
1060 u8 *pparam;
1061 unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
1062 u16 function, info;
1063 static u8 confparam[10]; /* max. 9 octets + length byte */
1064
1065 /* decode message */
6c911916
TS		 1066 capi_message2cmsg(cmsg, skb->data);
1067 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1068
1069 /*
1070 * Facility Request Parameter is not decoded by capi_message2cmsg()
1071 * encoding depends on Facility Selector
1072 */
6c911916 1073 switch (cmsg->FacilitySelector) {
7bb5fdc2
TS		 1074 case CAPI_FACILITY_DTMF: /* ToDo */
1075 info = CapiFacilityNotSupported;
1076 confparam[0] = 2; /* length */
1077 /* DTMF information: Unknown DTMF request */
1078 capimsg_setu16(confparam, 1, 2);
1079 break;
1080
1081 case CAPI_FACILITY_V42BIS: /* not supported */
1082 info = CapiFacilityNotSupported;
1083 confparam[0] = 2; /* length */
1084 /* V.42 bis information: not available */
1085 capimsg_setu16(confparam, 1, 1);
1086 break;
1087
1088 case CAPI_FACILITY_SUPPSVC:
1089 /* decode Function parameter */
6c911916 1090 pparam = cmsg->FacilityRequestParameter;
7bb5fdc2
TS		 1091 if (pparam == NULL || *pparam < 2) {
1092 dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
1093 "Facility Request Parameter");
1094 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1095 return;
1096 }
1097 function = CAPIMSG_U16(pparam, 1);
1098 switch (function) {
1099 case CAPI_SUPPSVC_GETSUPPORTED:
1100 info = CapiSuccess;
1101 /* Supplementary Service specific parameter */
1102 confparam[3] = 6; /* length */
1103 /* Supplementary services info: Success */
1104 capimsg_setu16(confparam, 4, CapiSuccess);
1105 /* Supported Services: none */
1106 capimsg_setu32(confparam, 6, 0);
1107 break;
1108 /* ToDo: add supported services */
1109 default:
1110 info = CapiFacilitySpecificFunctionNotSupported;
1111 /* Supplementary Service specific parameter */
1112 confparam[3] = 2; /* length */
1113 /* Supplementary services info: not supported */
1114 capimsg_setu16(confparam, 4,
1115 CapiSupplementaryServiceNotSupported);
1116 }
1117
1118 /* Facility confirmation parameter */
1119 confparam[0] = confparam[3] + 3; /* total length */
1120 /* Function: copy from _REQ message */
1121 capimsg_setu16(confparam, 1, function);
1122 /* Supplementary Service specific parameter already set above */
1123 break;
1124
1125 case CAPI_FACILITY_WAKEUP: /* ToDo */
1126 info = CapiFacilityNotSupported;
1127 confparam[0] = 2; /* length */
1128 /* Number of accepted awake request parameters: 0 */
1129 capimsg_setu16(confparam, 1, 0);
1130 break;
1131
1132 default:
1133 info = CapiFacilityNotSupported;
1134 confparam[0] = 0; /* empty struct */
1135 }
1136
1137 /* send FACILITY_CONF with given Info and confirmation parameter */
6c911916
TS		 1138 capi_cmsg_answer(cmsg);
1139 cmsg->Info = info;
1140 cmsg->FacilityConfirmationParameter = confparam;
7bb5fdc2
TS		 1141 msgsize += confparam[0]; /* length */
1142 cskb = alloc_skb(msgsize, GFP_ATOMIC);
1143 if (!cskb) {
1144 dev_err(cs->dev, "%s: out of memory\n", __func__);
1145 return;
1146 }
6c911916
TS		 1147 capi_cmsg2message(cmsg, __skb_put(cskb, msgsize));
1148 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1149 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
7bb5fdc2
TS		 1150}
1151
1152
1153/*
1154 * process LISTEN_REQ message
1155 * just store the masks in the application data structure
1156 */
1157static void do_listen_req(struct gigaset_capi_ctr *iif,
1158 struct gigaset_capi_appl *ap,
1159 struct sk_buff *skb)
1160{
1161 /* decode message */
1162 capi_message2cmsg(&iif->acmsg, skb->data);
1163 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1164
1165 /* store listening parameters */
1166 ap->listenInfoMask = iif->acmsg.InfoMask;
1167 ap->listenCIPmask = iif->acmsg.CIPmask;
1168 send_conf(iif, ap, skb, CapiSuccess);
1169}
1170
1171/*
1172 * process ALERT_REQ message
1173 * nothing to do, Gigaset always alerts anyway
1174 */
1175static void do_alert_req(struct gigaset_capi_ctr *iif,
1176 struct gigaset_capi_appl *ap,
1177 struct sk_buff *skb)
1178{
1179 /* decode message */
1180 capi_message2cmsg(&iif->acmsg, skb->data);
1181 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1182 send_conf(iif, ap, skb, CapiAlertAlreadySent);
1183}
1184
1185/*
1186 * process CONNECT_REQ message
1187 * allocate a B channel, prepare dial commands, queue a DIAL event,
1188 * emit CONNECT_CONF reply
1189 */
1190static void do_connect_req(struct gigaset_capi_ctr *iif,
1191 struct gigaset_capi_appl *ap,
1192 struct sk_buff *skb)
1193{
1194 struct cardstate *cs = iif->ctr.driverdata;
1195 _cmsg *cmsg = &iif->acmsg;
1196 struct bc_state *bcs;
1197 char **commands;
1198 char *s;
1199 u8 *pp;
1200 int i, l;
1201 u16 info;
1202
1203 /* decode message */
6c911916
TS		 1204 capi_message2cmsg(cmsg, skb->data);
1205 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1206
1207 /* get free B channel & construct PLCI */
1208 bcs = gigaset_get_free_channel(cs);
1209 if (!bcs) {
1210 dev_notice(cs->dev, "%s: no B channel available\n",
1211 "CONNECT_REQ");
1212 send_conf(iif, ap, skb, CapiNoPlciAvailable);
1213 return;
1214 }
1215 ap->bcnext = NULL;
1216 bcs->ap = ap;
1217 cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
1218
1219 /* build command table */
1220 commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
1221 if (!commands)
1222 goto oom;
1223
1224 /* encode parameter: Called party number */
1225 pp = cmsg->CalledPartyNumber;
1226 if (pp == NULL || *pp == 0) {
1227 dev_notice(cs->dev, "%s: %s missing\n",
1228 "CONNECT_REQ", "Called party number");
1229 info = CapiIllMessageParmCoding;
1230 goto error;
1231 }
1232 l = *pp++;
1233 /* check type of number/numbering plan byte */
1234 switch (*pp) {
1235 case 0x80: /* unknown type / unknown numbering plan */
1236 case 0x81: /* unknown type / ISDN/Telephony numbering plan */
1237 break;
1238 default: /* others: warn about potential misinterpretation */
1239 dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
1240 "CONNECT_REQ", "Called party number", *pp);
1241 }
1242 pp++;
1243 l--;
1244 /* translate "**" internal call prefix to CTP value */
1245 if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
1246 s = "^SCTP=0\r";
1247 pp += 2;
1248 l -= 2;
1249 } else {
1250 s = "^SCTP=1\r";
1251 }
1252 commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
1253 if (!commands[AT_TYPE])
1254 goto oom;
1255 commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
1256 if (!commands[AT_DIAL])
1257 goto oom;
22077ebc 1258 snprintf(commands[AT_DIAL], l+3, "D%.*s\r", l, pp);
7bb5fdc2
TS		 1259
1260 /* encode parameter: Calling party number */
1261 pp = cmsg->CallingPartyNumber;
1262 if (pp != NULL && *pp > 0) {
1263 l = *pp++;
1264
1265 /* check type of number/numbering plan byte */
1266 /* ToDo: allow for/handle Ext=1? */
1267 switch (*pp) {
1268 case 0x00: /* unknown type / unknown numbering plan */
1269 case 0x01: /* unknown type / ISDN/Telephony num. plan */
1270 break;
1271 default:
1272 dev_notice(cs->dev,
1273 "%s: %s type/plan 0x%02x unsupported\n",
1274 "CONNECT_REQ", "Calling party number", *pp);
1275 }
1276 pp++;
1277 l--;
1278
1279 /* check presentation indicator */
1280 if (!l) {
1281 dev_notice(cs->dev, "%s: %s IE truncated\n",
1282 "CONNECT_REQ", "Calling party number");
1283 info = CapiIllMessageParmCoding;
1284 goto error;
1285 }
1286 switch (*pp & 0xfc) { /* ignore Screening indicator */
1287 case 0x80: /* Presentation allowed */
1288 s = "^SCLIP=1\r";
1289 break;
1290 case 0xa0: /* Presentation restricted */
1291 s = "^SCLIP=0\r";
1292 break;
1293 default:
1294 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1295 "CONNECT_REQ",
1296 "Presentation/Screening indicator",
1297 *pp);
1298 s = "^SCLIP=1\r";
1299 }
1300 commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
1301 if (!commands[AT_CLIP])
1302 goto oom;
1303 pp++;
1304 l--;
1305
1306 if (l) {
1307 /* number */
1308 commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
1309 if (!commands[AT_MSN])
1310 goto oom;
1311 snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
1312 }
1313 }
1314
1315 /* check parameter: CIP Value */
1316 if (cmsg->CIPValue > ARRAY_SIZE(cip2bchlc) ||
1317 (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
1318 dev_notice(cs->dev, "%s: unknown CIP value %d\n",
1319 "CONNECT_REQ", cmsg->CIPValue);
1320 info = CapiCipValueUnknown;
1321 goto error;
1322 }
1323
1324 /* check/encode parameter: BC */
1325 if (cmsg->BC && cmsg->BC[0]) {
1326 /* explicit BC overrides CIP */
1327 l = 2*cmsg->BC[0] + 7;
1328 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1329 if (!commands[AT_BC])
1330 goto oom;
1331 strcpy(commands[AT_BC], "^SBC=");
1332 decode_ie(cmsg->BC, commands[AT_BC]+5);
1333 strcpy(commands[AT_BC] + l - 2, "\r");
1334 } else if (cip2bchlc[cmsg->CIPValue].bc) {
1335 l = strlen(cip2bchlc[cmsg->CIPValue].bc) + 7;
1336 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1337 if (!commands[AT_BC])
1338 goto oom;
1339 snprintf(commands[AT_BC], l, "^SBC=%s\r",
1340 cip2bchlc[cmsg->CIPValue].bc);
1341 }
1342
1343 /* check/encode parameter: HLC */
1344 if (cmsg->HLC && cmsg->HLC[0]) {
1345 /* explicit HLC overrides CIP */
1346 l = 2*cmsg->HLC[0] + 7;
1347 commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
1348 if (!commands[AT_HLC])
1349 goto oom;
1350 strcpy(commands[AT_HLC], "^SHLC=");
1351 decode_ie(cmsg->HLC, commands[AT_HLC]+5);
1352 strcpy(commands[AT_HLC] + l - 2, "\r");
1353 } else if (cip2bchlc[cmsg->CIPValue].hlc) {
1354 l = strlen(cip2bchlc[cmsg->CIPValue].hlc) + 7;
1355 commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
1356 if (!commands[AT_HLC])
1357 goto oom;
1358 snprintf(commands[AT_HLC], l, "^SHLC=%s\r",
1359 cip2bchlc[cmsg->CIPValue].hlc);
1360 }
1361
1362 /* check/encode parameter: B Protocol */
1363 if (cmsg->BProtocol == CAPI_DEFAULT) {
1364 bcs->proto2 = L2_HDLC;
1365 dev_warn(cs->dev,
1366 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1367 } else {
1368 switch (cmsg->B1protocol) {
1369 case 0:
1370 bcs->proto2 = L2_HDLC;
1371 break;
1372 case 1:
1373 bcs->proto2 = L2_BITSYNC;
1374 break;
1375 default:
1376 dev_warn(cs->dev,
1377 "B1 Protocol %u unsupported, using Transparent\n",
1378 cmsg->B1protocol);
1379 bcs->proto2 = L2_BITSYNC;
1380 }
1381 if (cmsg->B2protocol != 1)
1382 dev_warn(cs->dev,
1383 "B2 Protocol %u unsupported, using Transparent\n",
1384 cmsg->B2protocol);
1385 if (cmsg->B3protocol != 0)
1386 dev_warn(cs->dev,
1387 "B3 Protocol %u unsupported, using Transparent\n",
1388 cmsg->B3protocol);
1389 ignore_cstruct_param(cs, cmsg->B1configuration,
1390 "CONNECT_REQ", "B1 Configuration");
1391 ignore_cstruct_param(cs, cmsg->B2configuration,
1392 "CONNECT_REQ", "B2 Configuration");
1393 ignore_cstruct_param(cs, cmsg->B3configuration,
1394 "CONNECT_REQ", "B3 Configuration");
1395 }
1396 commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
1397 if (!commands[AT_PROTO])
1398 goto oom;
1399 snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
1400
1401 /* ToDo: check/encode remaining parameters */
1402 ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
1403 "CONNECT_REQ", "Called pty subaddr");
1404 ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
1405 "CONNECT_REQ", "Calling pty subaddr");
1406 ignore_cstruct_param(cs, cmsg->LLC,
1407 "CONNECT_REQ", "LLC");
6c911916
TS		 1408 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1409 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1410 "CONNECT_REQ", "B Channel Information");
1411 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1412 "CONNECT_REQ", "Keypad Facility");
1413 ignore_cstruct_param(cs, cmsg->Useruserdata,
1414 "CONNECT_REQ", "User-User Data");
1415 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1416 "CONNECT_REQ", "Facility Data Array");
1417 }
7bb5fdc2
TS		 1418
1419 /* encode parameter: B channel to use */
1420 commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
1421 if (!commands[AT_ISO])
1422 goto oom;
1423 snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
1424 (unsigned) bcs->channel + 1);
1425
1426 /* queue & schedule EV_DIAL event */
1427 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
1428 bcs->at_state.seq_index, NULL))
1429 goto oom;
1430 gig_dbg(DEBUG_CMD, "scheduling DIAL");
1431 gigaset_schedule_event(cs);
1432 ap->connected = APCONN_SETUP;
1433 send_conf(iif, ap, skb, CapiSuccess);
1434 return;
1435
1436oom:
1437 dev_err(cs->dev, "%s: out of memory\n", __func__);
1438 info = CAPI_MSGOSRESOURCEERR;
1439error:
1440 if (commands)
1441 for (i = 0; i < AT_NUM; i++)
1442 kfree(commands[i]);
1443 kfree(commands);
1444 gigaset_free_channel(bcs);
1445 send_conf(iif, ap, skb, info);
1446}
1447
1448/*
1449 * process CONNECT_RESP message
1450 * checks protocol parameters and queues an ACCEPT or HUP event
1451 */
1452static void do_connect_resp(struct gigaset_capi_ctr *iif,
1453 struct gigaset_capi_appl *ap,
1454 struct sk_buff *skb)
1455{
1456 struct cardstate *cs = iif->ctr.driverdata;
1457 _cmsg *cmsg = &iif->acmsg;
1458 struct bc_state *bcs;
1459 struct gigaset_capi_appl *oap;
1460 int channel;
1461
1462 /* decode message */
6c911916
TS		 1463 capi_message2cmsg(cmsg, skb->data);
1464 dump_cmsg(DEBUG_CMD, __func__, cmsg);
4dd8230a 1465 dev_kfree_skb_any(skb);
7bb5fdc2
TS		 1466
1467 /* extract and check channel number from PLCI */
1468 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1469 if (!channel || channel > cs->channels) {
1470 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1471 "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
1472 return;
1473 }
1474 bcs = cs->bcs + channel - 1;
1475
1476 switch (cmsg->Reject) {
1477 case 0: /* Accept */
1478 /* drop all competing applications, keep only this one */
1479 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1480 if (oap != ap)
1481 send_disconnect_ind(bcs, oap,
1482 CapiCallGivenToOtherApplication);
1483 ap->bcnext = NULL;
1484 bcs->ap = ap;
1485 bcs->chstate |= CHS_NOTIFY_LL;
1486
1487 /* check/encode B channel protocol */
1488 if (cmsg->BProtocol == CAPI_DEFAULT) {
1489 bcs->proto2 = L2_HDLC;
1490 dev_warn(cs->dev,
1491 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1492 } else {
1493 switch (cmsg->B1protocol) {
1494 case 0:
1495 bcs->proto2 = L2_HDLC;
1496 break;
1497 case 1:
1498 bcs->proto2 = L2_BITSYNC;
1499 break;
1500 default:
1501 dev_warn(cs->dev,
1502 "B1 Protocol %u unsupported, using Transparent\n",
1503 cmsg->B1protocol);
1504 bcs->proto2 = L2_BITSYNC;
1505 }
1506 if (cmsg->B2protocol != 1)
1507 dev_warn(cs->dev,
1508 "B2 Protocol %u unsupported, using Transparent\n",
1509 cmsg->B2protocol);
1510 if (cmsg->B3protocol != 0)
1511 dev_warn(cs->dev,
1512 "B3 Protocol %u unsupported, using Transparent\n",
1513 cmsg->B3protocol);
1514 ignore_cstruct_param(cs, cmsg->B1configuration,
1515 "CONNECT_RESP", "B1 Configuration");
1516 ignore_cstruct_param(cs, cmsg->B2configuration,
1517 "CONNECT_RESP", "B2 Configuration");
1518 ignore_cstruct_param(cs, cmsg->B3configuration,
1519 "CONNECT_RESP", "B3 Configuration");
1520 }
1521
1522 /* ToDo: check/encode remaining parameters */
1523 ignore_cstruct_param(cs, cmsg->ConnectedNumber,
1524 "CONNECT_RESP", "Connected Number");
1525 ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
1526 "CONNECT_RESP", "Connected Subaddress");
1527 ignore_cstruct_param(cs, cmsg->LLC,
1528 "CONNECT_RESP", "LLC");
6c911916
TS		 1529 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1530 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1531 "CONNECT_RESP", "BChannel Information");
1532 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1533 "CONNECT_RESP", "Keypad Facility");
1534 ignore_cstruct_param(cs, cmsg->Useruserdata,
1535 "CONNECT_RESP", "User-User Data");
1536 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1537 "CONNECT_RESP", "Facility Data Array");
1538 }
7bb5fdc2
TS		 1539
1540 /* Accept call */
1541 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1542 EV_ACCEPT, NULL, 0, NULL))
1543 return;
1544 gig_dbg(DEBUG_CMD, "scheduling ACCEPT");
1545 gigaset_schedule_event(cs);
1546 return;
1547
1548 case 1: /* Ignore */
1549 /* send DISCONNECT_IND to this application */
1550 send_disconnect_ind(bcs, ap, 0);
1551
1552 /* remove it from the list of listening apps */
1553 if (bcs->ap == ap) {
1554 bcs->ap = ap->bcnext;
1555 if (bcs->ap == NULL)
1556 /* last one: stop ev-layer hupD notifications */
1557 bcs->chstate &= ~CHS_NOTIFY_LL;
1558 return;
1559 }
1560 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
1561 if (oap->bcnext == ap) {
1562 oap->bcnext = oap->bcnext->bcnext;
1563 return;
1564 }
1565 }
1566 dev_err(cs->dev, "%s: application %u not found\n",
1567 __func__, ap->id);
1568 return;
1569
1570 default: /* Reject */
1571 /* drop all competing applications, keep only this one */
1572 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1573 if (oap != ap)
1574 send_disconnect_ind(bcs, oap,
1575 CapiCallGivenToOtherApplication);
1576 ap->bcnext = NULL;
1577 bcs->ap = ap;
1578
1579 /* reject call - will trigger DISCONNECT_IND for this app */
1580 dev_info(cs->dev, "%s: Reject=%x\n",
1581 "CONNECT_RESP", cmsg->Reject);
1582 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1583 EV_HUP, NULL, 0, NULL))
1584 return;
1585 gig_dbg(DEBUG_CMD, "scheduling HUP");
1586 gigaset_schedule_event(cs);
1587 return;
1588 }
1589}
1590
1591/*
1592 * process CONNECT_B3_REQ message
1593 * build NCCI and emit CONNECT_B3_CONF reply
1594 */
1595static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
1596 struct gigaset_capi_appl *ap,
1597 struct sk_buff *skb)
1598{
1599 struct cardstate *cs = iif->ctr.driverdata;
6c911916 1600 _cmsg *cmsg = &iif->acmsg;
7bb5fdc2
TS		 1601 int channel;
1602
1603 /* decode message */
6c911916
TS		 1604 capi_message2cmsg(cmsg, skb->data);
1605 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1606
1607 /* extract and check channel number from PLCI */
6c911916 1608 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
7bb5fdc2
TS		 1609 if (!channel || channel > cs->channels) {
1610 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
6c911916 1611 "CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
7bb5fdc2
TS		 1612 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1613 return;
1614 }
1615
1616 /* mark logical connection active */
1617 ap->connected = APCONN_ACTIVE;
1618
1619 /* build NCCI: always 1 (one B3 connection only) */
6c911916 1620 cmsg->adr.adrNCCI |= 1 << 16;
7bb5fdc2
TS		 1621
1622 /* NCPI parameter: not applicable for B3 Transparent */
6c911916
TS		 1623 ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
1624 send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1625 CapiNcpiNotSupportedByProtocol : CapiSuccess);
7bb5fdc2
TS		 1626}
1627
1628/*
1629 * process CONNECT_B3_RESP message
1630 * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
1631 * or queue EV_HUP and emit DISCONNECT_B3_IND.
1632 * The emitted message is always shorter than the received one,
1633 * allowing to reuse the skb.
1634 */
1635static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
1636 struct gigaset_capi_appl *ap,
1637 struct sk_buff *skb)
1638{
1639 struct cardstate *cs = iif->ctr.driverdata;
6c911916
TS		 1640 _cmsg *cmsg = &iif->acmsg;
1641 struct bc_state *bcs;
7bb5fdc2
TS		 1642 int channel;
1643 unsigned int msgsize;
1644 u8 command;
1645
1646 /* decode message */
6c911916
TS		 1647 capi_message2cmsg(cmsg, skb->data);
1648 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1649
1650 /* extract and check channel number and NCCI */
6c911916 1651 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
7bb5fdc2 1652 if (!channel || channel > cs->channels ||
6c911916 1653 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
7bb5fdc2 1654 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
6c911916 1655 "CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
4dd8230a 1656 dev_kfree_skb_any(skb);
7bb5fdc2
TS		 1657 return;
1658 }
1659 bcs = &cs->bcs[channel-1];
1660
6c911916 1661 if (cmsg->Reject) {
7bb5fdc2
TS		 1662 /* Reject: clear B3 connect received flag */
1663 ap->connected = APCONN_SETUP;
1664
1665 /* trigger hangup, causing eventual DISCONNECT_IND */
1666 if (!gigaset_add_event(cs, &bcs->at_state,
1667 EV_HUP, NULL, 0, NULL)) {
1668 dev_err(cs->dev, "%s: out of memory\n", __func__);
4dd8230a 1669 dev_kfree_skb_any(skb);
7bb5fdc2
TS		 1670 return;
1671 }
1672 gig_dbg(DEBUG_CMD, "scheduling HUP");
1673 gigaset_schedule_event(cs);
1674
1675 /* emit DISCONNECT_B3_IND */
1676 command = CAPI_DISCONNECT_B3;
1677 msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
1678 } else {
1679 /*
1680 * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
1681 * we only send CONNECT_B3_IND if the B channel is up
1682 */
1683 command = CAPI_CONNECT_B3_ACTIVE;
1684 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
1685 }
6c911916
TS		 1686 capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
1687 ap->nextMessageNumber++, cmsg->adr.adrNCCI);
7bb5fdc2 1688 __skb_trim(skb, msgsize);
6c911916
TS		 1689 capi_cmsg2message(cmsg, skb->data);
1690 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1691 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1692}
1693
1694/*
1695 * process DISCONNECT_REQ message
1696 * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
1697 * emit DISCONNECT_CONF reply
1698 */
1699static void do_disconnect_req(struct gigaset_capi_ctr *iif,
1700 struct gigaset_capi_appl *ap,
1701 struct sk_buff *skb)
1702{
1703 struct cardstate *cs = iif->ctr.driverdata;
6c911916 1704 _cmsg *cmsg = &iif->acmsg;
7bb5fdc2
TS		 1705 struct bc_state *bcs;
1706 _cmsg *b3cmsg;
1707 struct sk_buff *b3skb;
1708 int channel;
1709
1710 /* decode message */
6c911916
TS		 1711 capi_message2cmsg(cmsg, skb->data);
1712 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1713
1714 /* extract and check channel number from PLCI */
6c911916 1715 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
7bb5fdc2
TS		 1716 if (!channel || channel > cs->channels) {
1717 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
6c911916 1718 "DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
7bb5fdc2
TS		 1719 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1720 return;
1721 }
1722 bcs = cs->bcs + channel - 1;
1723
1724 /* ToDo: process parameter: Additional info */
6c911916
TS		 1725 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1726 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1727 "DISCONNECT_REQ", "B Channel Information");
1728 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1729 "DISCONNECT_REQ", "Keypad Facility");
1730 ignore_cstruct_param(cs, cmsg->Useruserdata,
1731 "DISCONNECT_REQ", "User-User Data");
1732 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1733 "DISCONNECT_REQ", "Facility Data Array");
1734 }
7bb5fdc2
TS		 1735
1736 /* skip if DISCONNECT_IND already sent */
1737 if (!ap->connected)
1738 return;
1739
1740 /* check for active logical connection */
1741 if (ap->connected >= APCONN_ACTIVE) {
1742 /*
1743 * emit DISCONNECT_B3_IND with cause 0x3301
1744 * use separate cmsg structure, as the content of iif->acmsg
1745 * is still needed for creating the _CONF message
1746 */
1747 b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
1748 if (!b3cmsg) {
1749 dev_err(cs->dev, "%s: out of memory\n", __func__);
1750 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1751 return;
1752 }
1753 capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
1754 ap->nextMessageNumber++,
6c911916 1755 cmsg->adr.adrPLCI | (1 << 16));
7bb5fdc2
TS		 1756 b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
1757 b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
1758 if (b3skb == NULL) {
1759 dev_err(cs->dev, "%s: out of memory\n", __func__);
1760 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1761 return;
1762 }
1763 capi_cmsg2message(b3cmsg,
1764 __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
1765 kfree(b3cmsg);
1766 capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
1767 }
1768
1769 /* trigger hangup, causing eventual DISCONNECT_IND */
1770 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1771 dev_err(cs->dev, "%s: out of memory\n", __func__);
1772 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1773 return;
1774 }
1775 gig_dbg(DEBUG_CMD, "scheduling HUP");
1776 gigaset_schedule_event(cs);
1777
1778 /* emit reply */
1779 send_conf(iif, ap, skb, CapiSuccess);
1780}
1781
1782/*
1783 * process DISCONNECT_B3_REQ message
1784 * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
1785 */
1786static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
1787 struct gigaset_capi_appl *ap,
1788 struct sk_buff *skb)
1789{
1790 struct cardstate *cs = iif->ctr.driverdata;
6c911916 1791 _cmsg *cmsg = &iif->acmsg;
7bb5fdc2
TS		 1792 int channel;
1793
1794 /* decode message */
6c911916
TS		 1795 capi_message2cmsg(cmsg, skb->data);
1796 dump_cmsg(DEBUG_CMD, __func__, cmsg);
7bb5fdc2
TS		 1797
1798 /* extract and check channel number and NCCI */
6c911916 1799 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
7bb5fdc2 1800 if (!channel || channel > cs->channels ||
6c911916 1801 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
7bb5fdc2 1802 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
6c911916 1803 "DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
7bb5fdc2
TS		 1804 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1805 return;
1806 }
1807
1808 /* reject if logical connection not active */
1809 if (ap->connected < APCONN_ACTIVE) {
1810 send_conf(iif, ap, skb,
1811 CapiMessageNotSupportedInCurrentState);
1812 return;
1813 }
1814
1815 /* trigger hangup, causing eventual DISCONNECT_B3_IND */
1816 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1817 EV_HUP, NULL, 0, NULL)) {
1818 dev_err(cs->dev, "%s: out of memory\n", __func__);
1819 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1820 return;
1821 }
1822 gig_dbg(DEBUG_CMD, "scheduling HUP");
1823 gigaset_schedule_event(cs);
1824
1825 /* NCPI parameter: not applicable for B3 Transparent */
6c911916 1826 ignore_cstruct_param(cs, cmsg->NCPI,
7bb5fdc2 1827 "DISCONNECT_B3_REQ", "NCPI");
6c911916
TS		 1828 send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1829 CapiNcpiNotSupportedByProtocol : CapiSuccess);
7bb5fdc2
TS		 1830}
1831
1832/*
1833 * process DATA_B3_REQ message
1834 */
1835static void do_data_b3_req(struct gigaset_capi_ctr *iif,
1836 struct gigaset_capi_appl *ap,
1837 struct sk_buff *skb)
1838{
1839 struct cardstate *cs = iif->ctr.driverdata;
1840 int channel = CAPIMSG_PLCI_PART(skb->data);
1841 u16 ncci = CAPIMSG_NCCI_PART(skb->data);
1842 u16 msglen = CAPIMSG_LEN(skb->data);
1843 u16 datalen = CAPIMSG_DATALEN(skb->data);
1844 u16 flags = CAPIMSG_FLAGS(skb->data);
1845
1846 /* frequent message, avoid _cmsg overhead */
1847 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data);
1848
1849 gig_dbg(DEBUG_LLDATA,
1850 "Receiving data from LL (ch: %d, flg: %x, sz: %d|%d)",
1851 channel, flags, msglen, datalen);
1852
1853 /* check parameters */
1854 if (channel == 0 || channel > cs->channels || ncci != 1) {
1855 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1856 "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
1857 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1858 return;
1859 }
1860 if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
1861 dev_notice(cs->dev, "%s: unexpected length %d\n",
1862 "DATA_B3_REQ", msglen);
1863 if (msglen + datalen != skb->len)
1864 dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
1865 "DATA_B3_REQ", msglen, datalen, skb->len);
1866 if (msglen + datalen > skb->len) {
1867 /* message too short for announced data length */
1868 send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
1869 return;
1870 }
1871 if (flags & CAPI_FLAGS_RESERVED) {
1872 dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
1873 "DATA_B3_REQ", flags);
1874 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1875 return;
1876 }
1877
1878 /* reject if logical connection not active */
1879 if (ap->connected < APCONN_ACTIVE) {
1880 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1881 return;
1882 }
1883
4dd8230a
TS		 1884 /* pull CAPI message into link layer header */
1885 skb_reset_mac_header(skb);
1886 skb->mac_len = msglen;
7bb5fdc2 1887 skb_pull(skb, msglen);
4dd8230a
TS		 1888
1889 /* pass to device-specific module */
7bb5fdc2
TS		 1890 if (cs->ops->send_skb(&cs->bcs[channel-1], skb) < 0) {
1891 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1892 return;
1893 }
1894
1895 /* DATA_B3_CONF reply will be sent by gigaset_skb_sent() */
1896
1897 /*
1898 * ToDo: honor unset "delivery confirmation" bit
1899 * (send DATA_B3_CONF immediately?)
1900 */
1901}
1902
1903/*
1904 * process RESET_B3_REQ message
1905 * just always reply "not supported by current protocol"
1906 */
1907static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
1908 struct gigaset_capi_appl *ap,
1909 struct sk_buff *skb)
1910{
1911 /* decode message */
1912 capi_message2cmsg(&iif->acmsg, skb->data);
1913 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1914 send_conf(iif, ap, skb,
1915 CapiResetProcedureNotSupportedByCurrentProtocol);
1916}
1917
1918/*
1919 * dump unsupported/ignored messages at most twice per minute,
1920 * some apps send those very frequently
1921 */
1922static unsigned long ignored_msg_dump_time;
1923
1924/*
1925 * unsupported CAPI message handler
1926 */
1927static void do_unsupported(struct gigaset_capi_ctr *iif,
1928 struct gigaset_capi_appl *ap,
1929 struct sk_buff *skb)
1930{
1931 /* decode message */
1932 capi_message2cmsg(&iif->acmsg, skb->data);
1933 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
1934 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1935 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1936}
1937
1938/*
1939 * CAPI message handler: no-op
1940 */
1941static void do_nothing(struct gigaset_capi_ctr *iif,
1942 struct gigaset_capi_appl *ap,
1943 struct sk_buff *skb)
1944{
1945 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
1946 /* decode message */
1947 capi_message2cmsg(&iif->acmsg, skb->data);
1948 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1949 }
4dd8230a 1950 dev_kfree_skb_any(skb);
7bb5fdc2
TS		 1951}
1952
1953static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
1954 struct gigaset_capi_appl *ap,
1955 struct sk_buff *skb)
1956{
1957 dump_rawmsg(DEBUG_LLDATA, __func__, skb->data);
4dd8230a 1958 dev_kfree_skb_any(skb);
7bb5fdc2
TS		 1959}
1960
1961/* table of outgoing CAPI message handlers with lookup function */
1962typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
1963 struct gigaset_capi_appl *,
1964 struct sk_buff *);
1965
1966static struct {
1967 u16 cmd;
1968 capi_send_handler_t handler;
1969} capi_send_handler_table[] = {
1970 /* most frequent messages first for faster lookup */
1971 { CAPI_DATA_B3_REQ, do_data_b3_req },
1972 { CAPI_DATA_B3_RESP, do_data_b3_resp },
1973
1974 { CAPI_ALERT_REQ, do_alert_req },
1975 { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
1976 { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
1977 { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
1978 { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
1979 { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
1980 { CAPI_CONNECT_REQ, do_connect_req },
1981 { CAPI_CONNECT_RESP, do_connect_resp },
1982 { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
1983 { CAPI_DISCONNECT_B3_RESP, do_nothing },
1984 { CAPI_DISCONNECT_REQ, do_disconnect_req },
1985 { CAPI_DISCONNECT_RESP, do_nothing },
1986 { CAPI_FACILITY_REQ, do_facility_req },
1987 { CAPI_FACILITY_RESP, do_nothing },
1988 { CAPI_LISTEN_REQ, do_listen_req },
1989 { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
1990 { CAPI_RESET_B3_REQ, do_reset_b3_req },
1991 { CAPI_RESET_B3_RESP, do_nothing },
1992
1993 /*
1994 * ToDo: support overlap sending (requires ev-layer state
1995 * machine extension to generate additional ATD commands)
1996 */
1997 { CAPI_INFO_REQ, do_unsupported },
1998 { CAPI_INFO_RESP, do_nothing },
1999
2000 /*
2001 * ToDo: what's the proper response for these?
2002 */
2003 { CAPI_MANUFACTURER_REQ, do_nothing },
2004 { CAPI_MANUFACTURER_RESP, do_nothing },
2005};
2006
2007/* look up handler */
2008static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
2009{
2010 size_t i;
2011
2012 for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
2013 if (capi_send_handler_table[i].cmd == cmd)
2014 return capi_send_handler_table[i].handler;
2015 return NULL;
2016}
2017
2018
2019/**
2020 * gigaset_send_message() - accept a CAPI message from an application
2021 * @ctr: controller descriptor structure.
2022 * @skb: CAPI message.
2023 *
2024 * Return value: CAPI error code
2025 * Note: capidrv (and probably others, too) only uses the return value to
2026 * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
2027 */
2028static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
2029{
2030 struct gigaset_capi_ctr *iif
2031 = container_of(ctr, struct gigaset_capi_ctr, ctr);
2032 struct cardstate *cs = ctr->driverdata;
2033 struct gigaset_capi_appl *ap;
2034 capi_send_handler_t handler;
2035
2036 /* can only handle linear sk_buffs */
2037 if (skb_linearize(skb) < 0) {
2038 dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
2039 return CAPI_MSGOSRESOURCEERR;
2040 }
2041
2042 /* retrieve application data structure */
2043 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2044 if (!ap) {
2045 dev_notice(cs->dev, "%s: application %u not registered\n",
2046 __func__, CAPIMSG_APPID(skb->data));
2047 return CAPI_ILLAPPNR;
2048 }
2049
2050 /* look up command */
2051 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2052 if (!handler) {
2053 /* unknown/unsupported message type */
2054 if (printk_ratelimit())
2055 dev_notice(cs->dev, "%s: unsupported message %u\n",
2056 __func__, CAPIMSG_CMD(skb->data));
2057 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
2058 }
2059
2060 /* serialize */
2061 if (atomic_add_return(1, &iif->sendqlen) > 1) {
2062 /* queue behind other messages */
2063 skb_queue_tail(&iif->sendqueue, skb);
2064 return CAPI_NOERROR;
2065 }
2066
2067 /* process message */
2068 handler(iif, ap, skb);
2069
2070 /* process other messages arrived in the meantime */
2071 while (atomic_sub_return(1, &iif->sendqlen) > 0) {
2072 skb = skb_dequeue(&iif->sendqueue);
2073 if (!skb) {
2074 /* should never happen */
2075 dev_err(cs->dev, "%s: send queue empty\n", __func__);
2076 continue;
2077 }
2078 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2079 if (!ap) {
2080 /* could that happen? */
2081 dev_warn(cs->dev, "%s: application %u vanished\n",
2082 __func__, CAPIMSG_APPID(skb->data));
2083 continue;
2084 }
2085 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2086 if (!handler) {
2087 /* should never happen */
2088 dev_err(cs->dev, "%s: handler %x vanished\n",
2089 __func__, CAPIMSG_CMD(skb->data));
2090 continue;
2091 }
2092 handler(iif, ap, skb);
2093 }
2094
2095 return CAPI_NOERROR;
2096}
2097
2098/**
2099 * gigaset_procinfo() - build single line description for controller
2100 * @ctr: controller descriptor structure.
2101 *
2102 * Return value: pointer to generated string (null terminated)
2103 */
2104static char *gigaset_procinfo(struct capi_ctr *ctr)
2105{
2106 return ctr->name; /* ToDo: more? */
2107}
2108
2109/**
2110 * gigaset_ctr_read_proc() - build controller proc file entry
2111 * @page: buffer of PAGE_SIZE bytes for receiving the entry.
2112 * @start: unused.
2113 * @off: unused.
2114 * @count: unused.
2115 * @eof: unused.
2116 * @ctr: controller descriptor structure.
2117 *
2118 * Return value: length of generated entry
2119 */
2120static int gigaset_ctr_read_proc(char *page, char **start, off_t off,
2121 int count, int *eof, struct capi_ctr *ctr)
2122{
2123 struct cardstate *cs = ctr->driverdata;
2124 char *s;
2125 int i;
2126 int len = 0;
2127 len += sprintf(page+len, "%-16s %s\n", "name", ctr->name);
2128 len += sprintf(page+len, "%-16s %s %s\n", "dev",
2129 dev_driver_string(cs->dev), dev_name(cs->dev));
2130 len += sprintf(page+len, "%-16s %d\n", "id", cs->myid);
2131 if (cs->gotfwver)
2132 len += sprintf(page+len, "%-16s %d.%d.%d.%d\n", "firmware",
2133 cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
2134 len += sprintf(page+len, "%-16s %d\n", "channels",
2135 cs->channels);
2136 len += sprintf(page+len, "%-16s %s\n", "onechannel",
2137 cs->onechannel ? "yes" : "no");
2138
2139 switch (cs->mode) {
2140 case M_UNKNOWN:
2141 s = "unknown";
2142 break;
2143 case M_CONFIG:
2144 s = "config";
2145 break;
2146 case M_UNIMODEM:
2147 s = "Unimodem";
2148 break;
2149 case M_CID:
2150 s = "CID";
2151 break;
2152 default:
2153 s = "??";
2154 }
2155 len += sprintf(page+len, "%-16s %s\n", "mode", s);
2156
2157 switch (cs->mstate) {
2158 case MS_UNINITIALIZED:
2159 s = "uninitialized";
2160 break;
2161 case MS_INIT:
2162 s = "init";
2163 break;
2164 case MS_LOCKED:
2165 s = "locked";
2166 break;
2167 case MS_SHUTDOWN:
2168 s = "shutdown";
2169 break;
2170 case MS_RECOVER:
2171 s = "recover";
2172 break;
2173 case MS_READY:
2174 s = "ready";
2175 break;
2176 default:
2177 s = "??";
2178 }
2179 len += sprintf(page+len, "%-16s %s\n", "mstate", s);
2180
2181 len += sprintf(page+len, "%-16s %s\n", "running",
2182 cs->running ? "yes" : "no");
2183 len += sprintf(page+len, "%-16s %s\n", "connected",
2184 cs->connected ? "yes" : "no");
2185 len += sprintf(page+len, "%-16s %s\n", "isdn_up",
2186 cs->isdn_up ? "yes" : "no");
2187 len += sprintf(page+len, "%-16s %s\n", "cidmode",
2188 cs->cidmode ? "yes" : "no");
2189
2190 for (i = 0; i < cs->channels; i++) {
2191 len += sprintf(page+len, "[%d]%-13s %d\n", i, "corrupted",
2192 cs->bcs[i].corrupted);
2193 len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_down",
2194 cs->bcs[i].trans_down);
2195 len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_up",
2196 cs->bcs[i].trans_up);
2197 len += sprintf(page+len, "[%d]%-13s %d\n", i, "chstate",
2198 cs->bcs[i].chstate);
2199 switch (cs->bcs[i].proto2) {
2200 case L2_BITSYNC:
2201 s = "bitsync";
2202 break;
2203 case L2_HDLC:
2204 s = "HDLC";
2205 break;
2206 case L2_VOICE:
2207 s = "voice";
2208 break;
2209 default:
2210 s = "??";
2211 }
2212 len += sprintf(page+len, "[%d]%-13s %s\n", i, "proto2", s);
2213 }
2214 return len;
2215}
2216
2217
2218static struct capi_driver capi_driver_gigaset = {
2219 .name = "gigaset",
2220 .revision = "1.0",
2221};
2222
2223/**
2224 * gigaset_isdn_register() - register to LL
2225 * @cs: device descriptor structure.
2226 * @isdnid: device name.
2227 *
2228 * Called by main module to register the device with the LL.
2229 *
2230 * Return value: 1 for success, 0 for failure
2231 */
2232int gigaset_isdn_register(struct cardstate *cs, const char *isdnid)
2233{
2234 struct gigaset_capi_ctr *iif;
2235 int rc;
2236
2237 pr_info("Kernel CAPI interface\n");
2238
2239 iif = kmalloc(sizeof(*iif), GFP_KERNEL);
2240 if (!iif) {
2241 pr_err("%s: out of memory\n", __func__);
2242 return 0;
2243 }
2244
2245 /* register driver with CAPI (ToDo: what for?) */
2246 register_capi_driver(&capi_driver_gigaset);
2247
2248 /* prepare controller structure */
2249 iif->ctr.owner = THIS_MODULE;
2250 iif->ctr.driverdata = cs;
2251 strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
2252 iif->ctr.driver_name = "gigaset";
2253 iif->ctr.load_firmware = gigaset_load_firmware;
2254 iif->ctr.reset_ctr = gigaset_reset_ctr;
2255 iif->ctr.register_appl = gigaset_register_appl;
2256 iif->ctr.release_appl = gigaset_release_appl;
2257 iif->ctr.send_message = gigaset_send_message;
2258 iif->ctr.procinfo = gigaset_procinfo;
2259 iif->ctr.ctr_read_proc = gigaset_ctr_read_proc;
2260 INIT_LIST_HEAD(&iif->appls);
2261 skb_queue_head_init(&iif->sendqueue);
2262 atomic_set(&iif->sendqlen, 0);
2263
2264 /* register controller with CAPI */
2265 rc = attach_capi_ctr(&iif->ctr);
2266 if (rc) {
2267 pr_err("attach_capi_ctr failed (%d)\n", rc);
2268 unregister_capi_driver(&capi_driver_gigaset);
2269 kfree(iif);
2270 return 0;
2271 }
2272
2273 cs->iif = iif;
2274 cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
2275 return 1;
2276}
2277
2278/**
2279 * gigaset_isdn_unregister() - unregister from LL
2280 * @cs: device descriptor structure.
2281 *
2282 * Called by main module to unregister the device from the LL.
2283 */
2284void gigaset_isdn_unregister(struct cardstate *cs)
2285{
2286 struct gigaset_capi_ctr *iif = cs->iif;
2287
2288 detach_capi_ctr(&iif->ctr);
2289 kfree(iif);
2290 cs->iif = NULL;
2291 unregister_capi_driver(&capi_driver_gigaset);
2292}
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