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drivers: isdn: use new hex_to_bin() method
[linux-2.6.git] / drivers / isdn / gigaset / capi.c
blobac4cfeed3946bc6e1010c15ab47c7084887ef8ec
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/proc_fs.h>
16 #include <linux/seq_file.h>
17 #include <linux/isdn/capilli.h>
18 #include <linux/isdn/capicmd.h>
19 #include <linux/isdn/capiutil.h>
20
21 /* missing from kernelcapi.h */
22 #define CapiNcpiNotSupportedByProtocol 0x0001
23 #define CapiFlagsNotSupportedByProtocol 0x0002
24 #define CapiAlertAlreadySent 0x0003
25 #define CapiFacilitySpecificFunctionNotSupported 0x3011
26
27 /* missing from capicmd.h */
28 #define CAPI_CONNECT_IND_BASELEN (CAPI_MSG_BASELEN+4+2+8*1)
29 #define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+3*1)
30 #define CAPI_CONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
31 #define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
32 #define CAPI_DATA_B3_REQ_LEN64 (CAPI_MSG_BASELEN+4+4+2+2+2+8)
33 #define CAPI_DATA_B3_CONF_LEN (CAPI_MSG_BASELEN+4+2+2)
34 #define CAPI_DISCONNECT_IND_LEN (CAPI_MSG_BASELEN+4+2)
35 #define CAPI_DISCONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+2+1)
36 #define CAPI_FACILITY_CONF_BASELEN (CAPI_MSG_BASELEN+4+2+2+1)
37 /* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
38 #define CAPI_STDCONF_LEN (CAPI_MSG_BASELEN+4+2)
39
40 #define CAPI_FACILITY_HANDSET 0x0000
41 #define CAPI_FACILITY_DTMF 0x0001
42 #define CAPI_FACILITY_V42BIS 0x0002
43 #define CAPI_FACILITY_SUPPSVC 0x0003
44 #define CAPI_FACILITY_WAKEUP 0x0004
45 #define CAPI_FACILITY_LI 0x0005
46
47 #define CAPI_SUPPSVC_GETSUPPORTED 0x0000
48
49 /* missing from capiutil.h */
50 #define CAPIMSG_PLCI_PART(m) CAPIMSG_U8(m, 9)
51 #define CAPIMSG_NCCI_PART(m) CAPIMSG_U16(m, 10)
52 #define CAPIMSG_HANDLE_REQ(m) CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
53 #define CAPIMSG_FLAGS(m) CAPIMSG_U16(m, 20)
54 #define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
55 #define CAPIMSG_SETPLCI_PART(m, plci) capimsg_setu8(m, 9, plci)
56 #define CAPIMSG_SETNCCI_PART(m, ncci) capimsg_setu16(m, 10, ncci)
57 #define CAPIMSG_SETFLAGS(m, flags) capimsg_setu16(m, 20, flags)
58
59 /* parameters with differing location in DATA_B3_CONF/_RESP: */
60 #define CAPIMSG_SETHANDLE_CONF(m, handle) capimsg_setu16(m, 12, handle)
61 #define CAPIMSG_SETINFO_CONF(m, info) capimsg_setu16(m, 14, info)
62
63 /* Flags (DATA_B3_REQ/_IND) */
64 #define CAPI_FLAGS_DELIVERY_CONFIRMATION 0x04
65 #define CAPI_FLAGS_RESERVED (~0x1f)
66
67 /* buffer sizes */
68 #define MAX_BC_OCTETS 11
69 #define MAX_HLC_OCTETS 3
70 #define MAX_NUMBER_DIGITS 20
71 #define MAX_FMT_IE_LEN 20
72
73 /* values for gigaset_capi_appl.connected */
74 #define APCONN_NONE 0 /* inactive/listening */
75 #define APCONN_SETUP 1 /* connecting */
76 #define APCONN_ACTIVE 2 /* B channel up */
77
78 /* registered application data structure */
79 struct gigaset_capi_appl {
80 struct list_head ctrlist;
81 struct gigaset_capi_appl *bcnext;
82 u16 id;
83 u16 nextMessageNumber;
84 u32 listenInfoMask;
85 u32 listenCIPmask;
86 int connected;
87 };
88
89 /* CAPI specific controller data structure */
90 struct gigaset_capi_ctr {
91 struct capi_ctr ctr;
92 struct list_head appls;
93 struct sk_buff_head sendqueue;
94 atomic_t sendqlen;
95 /* two _cmsg structures possibly used concurrently: */
96 _cmsg hcmsg; /* for message composition triggered from hardware */
97 _cmsg acmsg; /* for dissection of messages sent from application */
98 u8 bc_buf[MAX_BC_OCTETS+1];
99 u8 hlc_buf[MAX_HLC_OCTETS+1];
100 u8 cgpty_buf[MAX_NUMBER_DIGITS+3];
101 u8 cdpty_buf[MAX_NUMBER_DIGITS+2];
102 };
103
104 /* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
105 static struct {
106 u8 *bc;
107 u8 *hlc;
108 } cip2bchlc[] = {
109 [1] = { "8090A3", NULL },
110 /* Speech (A-law) */
111 [2] = { "8890", NULL },
112 /* Unrestricted digital information */
113 [3] = { "8990", NULL },
114 /* Restricted digital information */
115 [4] = { "9090A3", NULL },
116 /* 3,1 kHz audio (A-law) */
117 [5] = { "9190", NULL },
118 /* 7 kHz audio */
119 [6] = { "9890", NULL },
120 /* Video */
121 [7] = { "88C0C6E6", NULL },
122 /* Packet mode */
123 [8] = { "8890218F", NULL },
124 /* 56 kbit/s rate adaptation */
125 [9] = { "9190A5", NULL },
126 /* Unrestricted digital information with tones/announcements */
127 [16] = { "8090A3", "9181" },
128 /* Telephony */
129 [17] = { "9090A3", "9184" },
130 /* Group 2/3 facsimile */
131 [18] = { "8890", "91A1" },
132 /* Group 4 facsimile Class 1 */
133 [19] = { "8890", "91A4" },
134 /* Teletex service basic and mixed mode
135 and Group 4 facsimile service Classes II and III */
136 [20] = { "8890", "91A8" },
137 /* Teletex service basic and processable mode */
138 [21] = { "8890", "91B1" },
139 /* Teletex service basic mode */
140 [22] = { "8890", "91B2" },
141 /* International interworking for Videotex */
142 [23] = { "8890", "91B5" },
143 /* Telex */
144 [24] = { "8890", "91B8" },
145 /* Message Handling Systems in accordance with X.400 */
146 [25] = { "8890", "91C1" },
147 /* OSI application in accordance with X.200 */
148 [26] = { "9190A5", "9181" },
149 /* 7 kHz telephony */
150 [27] = { "9190A5", "916001" },
151 /* Video telephony, first connection */
152 [28] = { "8890", "916002" },
153 /* Video telephony, second connection */
154 };
155
156 /*
157 * helper functions
158 * ================
159 */
160
161 /*
162 * emit unsupported parameter warning
163 */
164 static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
165 char *msgname, char *paramname)
166 {
167 if (param && *param)
168 dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
169 msgname, paramname);
170 }
171
172 /*
173 * convert an IE from Gigaset hex string to ETSI binary representation
174 * including length byte
175 * return value: result length, -1 on error
176 */
177 static int encode_ie(char *in, u8 *out, int maxlen)
178 {
179 int l = 0;
180 while (*in) {
181 if (!isxdigit(in[0]) || !isxdigit(in[1]) || l >= maxlen)
182 return -1;
183 out[++l] = (hex_to_bin(in[0]) << 4) + hex_to_bin(in[1]);
184 in += 2;
185 }
186 out[0] = l;
187 return l;
188 }
189
190 /*
191 * convert an IE from ETSI binary representation including length byte
192 * to Gigaset hex string
193 */
194 static void decode_ie(u8 *in, char *out)
195 {
196 int i = *in;
197 while (i-- > 0) {
198 /* ToDo: conversion to upper case necessary? */
199 *out++ = toupper(hex_asc_hi(*++in));
200 *out++ = toupper(hex_asc_lo(*in));
201 }
202 }
203
204 /*
205 * retrieve application data structure for an application ID
206 */
207 static inline struct gigaset_capi_appl *
208 get_appl(struct gigaset_capi_ctr *iif, u16 appl)
209 {
210 struct gigaset_capi_appl *ap;
211
212 list_for_each_entry(ap, &iif->appls, ctrlist)
213 if (ap->id == appl)
214 return ap;
215 return NULL;
216 }
217
218 /*
219 * dump CAPI message to kernel messages for debugging
220 */
221 static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
222 {
223 #ifdef CONFIG_GIGASET_DEBUG
224 _cdebbuf *cdb;
225
226 if (!(gigaset_debuglevel & level))
227 return;
228
229 cdb = capi_cmsg2str(p);
230 if (cdb) {
231 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
232 cdebbuf_free(cdb);
233 } else {
234 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
235 capi_cmd2str(p->Command, p->Subcommand));
236 }
237 #endif
238 }
239
240 static inline void dump_rawmsg(enum debuglevel level, const char *tag,
241 unsigned char *data)
242 {
243 #ifdef CONFIG_GIGASET_DEBUG
244 char *dbgline;
245 int i, l;
246
247 if (!(gigaset_debuglevel & level))
248 return;
249
250 l = CAPIMSG_LEN(data);
251 if (l < 12) {
252 gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
253 return;
254 }
255 gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
256 tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
257 CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
258 CAPIMSG_CONTROL(data));
259 l -= 12;
260 dbgline = kmalloc(3*l, GFP_ATOMIC);
261 if (!dbgline)
262 return;
263 for (i = 0; i < l; i++) {
264 dbgline[3*i] = hex_asc_hi(data[12+i]);
265 dbgline[3*i+1] = hex_asc_lo(data[12+i]);
266 dbgline[3*i+2] = ' ';
267 }
268 dbgline[3*l-1] = '\0';
269 gig_dbg(level, " %s", dbgline);
270 kfree(dbgline);
271 if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
272 (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
273 CAPIMSG_SUBCOMMAND(data) == CAPI_IND) &&
274 CAPIMSG_DATALEN(data) > 0) {
275 l = CAPIMSG_DATALEN(data);
276 dbgline = kmalloc(3*l, GFP_ATOMIC);
277 if (!dbgline)
278 return;
279 data += CAPIMSG_LEN(data);
280 for (i = 0; i < l; i++) {
281 dbgline[3*i] = hex_asc_hi(data[i]);
282 dbgline[3*i+1] = hex_asc_lo(data[i]);
283 dbgline[3*i+2] = ' ';
284 }
285 dbgline[3*l-1] = '\0';
286 gig_dbg(level, " %s", dbgline);
287 kfree(dbgline);
288 }
289 #endif
290 }
291
292 /*
293 * format CAPI IE as string
294 */
295
296 static const char *format_ie(const char *ie)
297 {
298 static char result[3*MAX_FMT_IE_LEN];
299 int len, count;
300 char *pout = result;
301
302 if (!ie)
303 return "NULL";
304
305 count = len = ie[0];
306 if (count > MAX_FMT_IE_LEN)
307 count = MAX_FMT_IE_LEN-1;
308 while (count--) {
309 *pout++ = hex_asc_hi(*++ie);
310 *pout++ = hex_asc_lo(*ie);
311 *pout++ = ' ';
312 }
313 if (len > MAX_FMT_IE_LEN) {
314 *pout++ = '.';
315 *pout++ = '.';
316 *pout++ = '.';
317 }
318 *--pout = 0;
319 return result;
320 }
321
322
323 /*
324 * driver interface functions
325 * ==========================
326 */
327
328 /**
329 * gigaset_skb_sent() - acknowledge transmission of outgoing skb
330 * @bcs: B channel descriptor structure.
331 * @skb: sent data.
332 *
333 * Called by hardware module {bas,ser,usb}_gigaset when the data in a
334 * skb has been successfully sent, for signalling completion to the LL.
335 */
336 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
337 {
338 struct cardstate *cs = bcs->cs;
339 struct gigaset_capi_ctr *iif = cs->iif;
340 struct gigaset_capi_appl *ap = bcs->ap;
341 unsigned char *req = skb_mac_header(dskb);
342 struct sk_buff *cskb;
343 u16 flags;
344
345 /* update statistics */
346 ++bcs->trans_up;
347
348 if (!ap) {
349 dev_err(cs->dev, "%s: no application\n", __func__);
350 return;
351 }
352
353 /* don't send further B3 messages if disconnected */
354 if (ap->connected < APCONN_ACTIVE) {
355 gig_dbg(DEBUG_LLDATA, "disconnected, discarding ack");
356 return;
357 }
358
359 /* ToDo: honor unset "delivery confirmation" bit */
360 flags = CAPIMSG_FLAGS(req);
361
362 /* build DATA_B3_CONF message */
363 cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
364 if (!cskb) {
365 dev_err(cs->dev, "%s: out of memory\n", __func__);
366 return;
367 }
368 /* frequent message, avoid _cmsg overhead */
369 CAPIMSG_SETLEN(cskb->data, CAPI_DATA_B3_CONF_LEN);
370 CAPIMSG_SETAPPID(cskb->data, ap->id);
371 CAPIMSG_SETCOMMAND(cskb->data, CAPI_DATA_B3);
372 CAPIMSG_SETSUBCOMMAND(cskb->data, CAPI_CONF);
373 CAPIMSG_SETMSGID(cskb->data, CAPIMSG_MSGID(req));
374 CAPIMSG_SETCONTROLLER(cskb->data, iif->ctr.cnr);
375 CAPIMSG_SETPLCI_PART(cskb->data, bcs->channel + 1);
376 CAPIMSG_SETNCCI_PART(cskb->data, 1);
377 CAPIMSG_SETHANDLE_CONF(cskb->data, CAPIMSG_HANDLE_REQ(req));
378 if (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION)
379 CAPIMSG_SETINFO_CONF(cskb->data,
380 CapiFlagsNotSupportedByProtocol);
381 else
382 CAPIMSG_SETINFO_CONF(cskb->data, CAPI_NOERROR);
383
384 /* emit message */
385 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_CONF", cskb->data);
386 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
387 }
388 EXPORT_SYMBOL_GPL(gigaset_skb_sent);
389
390 /**
391 * gigaset_skb_rcvd() - pass received skb to LL
392 * @bcs: B channel descriptor structure.
393 * @skb: received data.
394 *
395 * Called by hardware module {bas,ser,usb}_gigaset when user data has
396 * been successfully received, for passing to the LL.
397 * Warning: skb must not be accessed anymore!
398 */
399 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
400 {
401 struct cardstate *cs = bcs->cs;
402 struct gigaset_capi_ctr *iif = cs->iif;
403 struct gigaset_capi_appl *ap = bcs->ap;
404 int len = skb->len;
405
406 /* update statistics */
407 bcs->trans_down++;
408
409 if (!ap) {
410 dev_err(cs->dev, "%s: no application\n", __func__);
411 return;
412 }
413
414 /* don't send further B3 messages if disconnected */
415 if (ap->connected < APCONN_ACTIVE) {
416 gig_dbg(DEBUG_LLDATA, "disconnected, discarding data");
417 dev_kfree_skb_any(skb);
418 return;
419 }
420
421 /*
422 * prepend DATA_B3_IND message to payload
423 * Parameters: NCCI = 1, all others 0/unused
424 * frequent message, avoid _cmsg overhead
425 */
426 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
427 CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
428 CAPIMSG_SETAPPID(skb->data, ap->id);
429 CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
430 CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
431 CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
432 CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
433 CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
434 CAPIMSG_SETNCCI_PART(skb->data, 1);
435 /* Data parameter not used */
436 CAPIMSG_SETDATALEN(skb->data, len);
437 /* Data handle parameter not used */
438 CAPIMSG_SETFLAGS(skb->data, 0);
439 /* Data64 parameter not present */
440
441 /* emit message */
442 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_IND", skb->data);
443 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
444 }
445 EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
446
447 /**
448 * gigaset_isdn_rcv_err() - signal receive error
449 * @bcs: B channel descriptor structure.
450 *
451 * Called by hardware module {bas,ser,usb}_gigaset when a receive error
452 * has occurred, for signalling to the LL.
453 */
454 void gigaset_isdn_rcv_err(struct bc_state *bcs)
455 {
456 /* if currently ignoring packets, just count down */
457 if (bcs->ignore) {
458 bcs->ignore--;
459 return;
460 }
461
462 /* update statistics */
463 bcs->corrupted++;
464
465 /* ToDo: signal error -> LL */
466 }
467 EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
468
469 /**
470 * gigaset_isdn_icall() - signal incoming call
471 * @at_state: connection state structure.
472 *
473 * Called by main module at tasklet level to notify the LL that an incoming
474 * call has been received. @at_state contains the parameters of the call.
475 *
476 * Return value: call disposition (ICALL_*)
477 */
478 int gigaset_isdn_icall(struct at_state_t *at_state)
479 {
480 struct cardstate *cs = at_state->cs;
481 struct bc_state *bcs = at_state->bcs;
482 struct gigaset_capi_ctr *iif = cs->iif;
483 struct gigaset_capi_appl *ap;
484 u32 actCIPmask;
485 struct sk_buff *skb;
486 unsigned int msgsize;
487 int i;
488
489 /*
490 * ToDo: signal calls without a free B channel, too
491 * (requires a u8 handle for the at_state structure that can
492 * be stored in the PLCI and used in the CONNECT_RESP message
493 * handler to retrieve it)
494 */
495 if (!bcs)
496 return ICALL_IGNORE;
497
498 /* prepare CONNECT_IND message, using B channel number as PLCI */
499 capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
500 iif->ctr.cnr | ((bcs->channel + 1) << 8));
501
502 /* minimum size, all structs empty */
503 msgsize = CAPI_CONNECT_IND_BASELEN;
504
505 /* Bearer Capability (mandatory) */
506 if (at_state->str_var[STR_ZBC]) {
507 /* pass on BC from Gigaset */
508 if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
509 MAX_BC_OCTETS) < 0) {
510 dev_warn(cs->dev, "RING ignored - bad BC %s\n",
511 at_state->str_var[STR_ZBC]);
512 return ICALL_IGNORE;
513 }
514
515 /* look up corresponding CIP value */
516 iif->hcmsg.CIPValue = 0; /* default if nothing found */
517 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
518 if (cip2bchlc[i].bc != NULL &&
519 cip2bchlc[i].hlc == NULL &&
520 !strcmp(cip2bchlc[i].bc,
521 at_state->str_var[STR_ZBC])) {
522 iif->hcmsg.CIPValue = i;
523 break;
524 }
525 } else {
526 /* no BC (internal call): assume CIP 1 (speech, A-law) */
527 iif->hcmsg.CIPValue = 1;
528 encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
529 }
530 iif->hcmsg.BC = iif->bc_buf;
531 msgsize += iif->hcmsg.BC[0];
532
533 /* High Layer Compatibility (optional) */
534 if (at_state->str_var[STR_ZHLC]) {
535 /* pass on HLC from Gigaset */
536 if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
537 MAX_HLC_OCTETS) < 0) {
538 dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
539 at_state->str_var[STR_ZHLC]);
540 return ICALL_IGNORE;
541 }
542 iif->hcmsg.HLC = iif->hlc_buf;
543 msgsize += iif->hcmsg.HLC[0];
544
545 /* look up corresponding CIP value */
546 /* keep BC based CIP value if none found */
547 if (at_state->str_var[STR_ZBC])
548 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
549 if (cip2bchlc[i].hlc != NULL &&
550 !strcmp(cip2bchlc[i].hlc,
551 at_state->str_var[STR_ZHLC]) &&
552 !strcmp(cip2bchlc[i].bc,
553 at_state->str_var[STR_ZBC])) {
554 iif->hcmsg.CIPValue = i;
555 break;
556 }
557 }
558
559 /* Called Party Number (optional) */
560 if (at_state->str_var[STR_ZCPN]) {
561 i = strlen(at_state->str_var[STR_ZCPN]);
562 if (i > MAX_NUMBER_DIGITS) {
563 dev_warn(cs->dev, "RING ignored - bad number %s\n",
564 at_state->str_var[STR_ZBC]);
565 return ICALL_IGNORE;
566 }
567 iif->cdpty_buf[0] = i + 1;
568 iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
569 memcpy(iif->cdpty_buf+2, at_state->str_var[STR_ZCPN], i);
570 iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
571 msgsize += iif->hcmsg.CalledPartyNumber[0];
572 }
573
574 /* Calling Party Number (optional) */
575 if (at_state->str_var[STR_NMBR]) {
576 i = strlen(at_state->str_var[STR_NMBR]);
577 if (i > MAX_NUMBER_DIGITS) {
578 dev_warn(cs->dev, "RING ignored - bad number %s\n",
579 at_state->str_var[STR_ZBC]);
580 return ICALL_IGNORE;
581 }
582 iif->cgpty_buf[0] = i + 2;
583 iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
584 iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
585 memcpy(iif->cgpty_buf+3, at_state->str_var[STR_NMBR], i);
586 iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
587 msgsize += iif->hcmsg.CallingPartyNumber[0];
588 }
589
590 /* remaining parameters (not supported, always left NULL):
591 * - CalledPartySubaddress
592 * - CallingPartySubaddress
593 * - AdditionalInfo
594 * - BChannelinformation
595 * - Keypadfacility
596 * - Useruserdata
597 * - Facilitydataarray
598 */
599
600 gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
601 iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
602 format_ie(iif->hcmsg.BC));
603 gig_dbg(DEBUG_CMD, "icall: HLC %s",
604 format_ie(iif->hcmsg.HLC));
605 gig_dbg(DEBUG_CMD, "icall: CgPty %s",
606 format_ie(iif->hcmsg.CallingPartyNumber));
607 gig_dbg(DEBUG_CMD, "icall: CdPty %s",
608 format_ie(iif->hcmsg.CalledPartyNumber));
609
610 /* scan application list for matching listeners */
611 bcs->ap = NULL;
612 actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
613 list_for_each_entry(ap, &iif->appls, ctrlist)
614 if (actCIPmask & ap->listenCIPmask) {
615 /* build CONNECT_IND message for this application */
616 iif->hcmsg.ApplId = ap->id;
617 iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
618
619 skb = alloc_skb(msgsize, GFP_ATOMIC);
620 if (!skb) {
621 dev_err(cs->dev, "%s: out of memory\n",
622 __func__);
623 break;
624 }
625 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
626 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
627
628 /* add to listeners on this B channel, update state */
629 ap->bcnext = bcs->ap;
630 bcs->ap = ap;
631 bcs->chstate |= CHS_NOTIFY_LL;
632 ap->connected = APCONN_SETUP;
633
634 /* emit message */
635 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
636 }
637
638 /*
639 * Return "accept" if any listeners.
640 * Gigaset will send ALERTING.
641 * There doesn't seem to be a way to avoid this.
642 */
643 return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
644 }
645
646 /*
647 * send a DISCONNECT_IND message to an application
648 * does not sleep, clobbers the controller's hcmsg structure
649 */
650 static void send_disconnect_ind(struct bc_state *bcs,
651 struct gigaset_capi_appl *ap, u16 reason)
652 {
653 struct cardstate *cs = bcs->cs;
654 struct gigaset_capi_ctr *iif = cs->iif;
655 struct sk_buff *skb;
656
657 if (ap->connected == APCONN_NONE)
658 return;
659
660 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
661 ap->nextMessageNumber++,
662 iif->ctr.cnr | ((bcs->channel + 1) << 8));
663 iif->hcmsg.Reason = reason;
664 skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
665 if (!skb) {
666 dev_err(cs->dev, "%s: out of memory\n", __func__);
667 return;
668 }
669 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
670 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
671 ap->connected = APCONN_NONE;
672 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
673 }
674
675 /*
676 * send a DISCONNECT_B3_IND message to an application
677 * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
678 * does not sleep, clobbers the controller's hcmsg structure
679 */
680 static void send_disconnect_b3_ind(struct bc_state *bcs,
681 struct gigaset_capi_appl *ap)
682 {
683 struct cardstate *cs = bcs->cs;
684 struct gigaset_capi_ctr *iif = cs->iif;
685 struct sk_buff *skb;
686
687 /* nothing to do if no logical connection active */
688 if (ap->connected < APCONN_ACTIVE)
689 return;
690 ap->connected = APCONN_SETUP;
691
692 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
693 ap->nextMessageNumber++,
694 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
695 skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
696 if (!skb) {
697 dev_err(cs->dev, "%s: out of memory\n", __func__);
698 return;
699 }
700 capi_cmsg2message(&iif->hcmsg,
701 __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
702 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
703 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
704 }
705
706 /**
707 * gigaset_isdn_connD() - signal D channel connect
708 * @bcs: B channel descriptor structure.
709 *
710 * Called by main module at tasklet level to notify the LL that the D channel
711 * connection has been established.
712 */
713 void gigaset_isdn_connD(struct bc_state *bcs)
714 {
715 struct cardstate *cs = bcs->cs;
716 struct gigaset_capi_ctr *iif = cs->iif;
717 struct gigaset_capi_appl *ap = bcs->ap;
718 struct sk_buff *skb;
719 unsigned int msgsize;
720
721 if (!ap) {
722 dev_err(cs->dev, "%s: no application\n", __func__);
723 return;
724 }
725 while (ap->bcnext) {
726 /* this should never happen */
727 dev_warn(cs->dev, "%s: dropping extra application %u\n",
728 __func__, ap->bcnext->id);
729 send_disconnect_ind(bcs, ap->bcnext,
730 CapiCallGivenToOtherApplication);
731 ap->bcnext = ap->bcnext->bcnext;
732 }
733 if (ap->connected == APCONN_NONE) {
734 dev_warn(cs->dev, "%s: application %u not connected\n",
735 __func__, ap->id);
736 return;
737 }
738
739 /* prepare CONNECT_ACTIVE_IND message
740 * Note: LLC not supported by device
741 */
742 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
743 ap->nextMessageNumber++,
744 iif->ctr.cnr | ((bcs->channel + 1) << 8));
745
746 /* minimum size, all structs empty */
747 msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
748
749 /* ToDo: set parameter: Connected number
750 * (requires ev-layer state machine extension to collect
751 * ZCON device reply)
752 */
753
754 /* build and emit CONNECT_ACTIVE_IND message */
755 skb = alloc_skb(msgsize, GFP_ATOMIC);
756 if (!skb) {
757 dev_err(cs->dev, "%s: out of memory\n", __func__);
758 return;
759 }
760 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
761 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
762 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
763 }
764
765 /**
766 * gigaset_isdn_hupD() - signal D channel hangup
767 * @bcs: B channel descriptor structure.
768 *
769 * Called by main module at tasklet level to notify the LL that the D channel
770 * connection has been shut down.
771 */
772 void gigaset_isdn_hupD(struct bc_state *bcs)
773 {
774 struct gigaset_capi_appl *ap;
775
776 /*
777 * ToDo: pass on reason code reported by device
778 * (requires ev-layer state machine extension to collect
779 * ZCAU device reply)
780 */
781 for (ap = bcs->ap; ap != NULL; ap = ap->bcnext) {
782 send_disconnect_b3_ind(bcs, ap);
783 send_disconnect_ind(bcs, ap, 0);
784 }
785 bcs->ap = NULL;
786 }
787
788 /**
789 * gigaset_isdn_connB() - signal B channel connect
790 * @bcs: B channel descriptor structure.
791 *
792 * Called by main module at tasklet level to notify the LL that the B channel
793 * connection has been established.
794 */
795 void gigaset_isdn_connB(struct bc_state *bcs)
796 {
797 struct cardstate *cs = bcs->cs;
798 struct gigaset_capi_ctr *iif = cs->iif;
799 struct gigaset_capi_appl *ap = bcs->ap;
800 struct sk_buff *skb;
801 unsigned int msgsize;
802 u8 command;
803
804 if (!ap) {
805 dev_err(cs->dev, "%s: no application\n", __func__);
806 return;
807 }
808 while (ap->bcnext) {
809 /* this should never happen */
810 dev_warn(cs->dev, "%s: dropping extra application %u\n",
811 __func__, ap->bcnext->id);
812 send_disconnect_ind(bcs, ap->bcnext,
813 CapiCallGivenToOtherApplication);
814 ap->bcnext = ap->bcnext->bcnext;
815 }
816 if (!ap->connected) {
817 dev_warn(cs->dev, "%s: application %u not connected\n",
818 __func__, ap->id);
819 return;
820 }
821
822 /*
823 * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
824 * otherwise we have to emit CONNECT_B3_IND first, and follow up with
825 * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
826 * Parameters in both cases always: NCCI = 1, NCPI empty
827 */
828 if (ap->connected >= APCONN_ACTIVE) {
829 command = CAPI_CONNECT_B3_ACTIVE;
830 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
831 } else {
832 command = CAPI_CONNECT_B3;
833 msgsize = CAPI_CONNECT_B3_IND_BASELEN;
834 }
835 capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
836 ap->nextMessageNumber++,
837 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
838 skb = alloc_skb(msgsize, GFP_ATOMIC);
839 if (!skb) {
840 dev_err(cs->dev, "%s: out of memory\n", __func__);
841 return;
842 }
843 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
844 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
845 ap->connected = APCONN_ACTIVE;
846 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
847 }
848
849 /**
850 * gigaset_isdn_hupB() - signal B channel hangup
851 * @bcs: B channel descriptor structure.
852 *
853 * Called by main module to notify the LL that the B channel connection has
854 * been shut down.
855 */
856 void gigaset_isdn_hupB(struct bc_state *bcs)
857 {
858 struct cardstate *cs = bcs->cs;
859 struct gigaset_capi_appl *ap = bcs->ap;
860
861 /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
862
863 if (!ap) {
864 dev_err(cs->dev, "%s: no application\n", __func__);
865 return;
866 }
867
868 send_disconnect_b3_ind(bcs, ap);
869 }
870
871 /**
872 * gigaset_isdn_start() - signal device availability
873 * @cs: device descriptor structure.
874 *
875 * Called by main module to notify the LL that the device is available for
876 * use.
877 */
878 void gigaset_isdn_start(struct cardstate *cs)
879 {
880 struct gigaset_capi_ctr *iif = cs->iif;
881
882 /* fill profile data: manufacturer name */
883 strcpy(iif->ctr.manu, "Siemens");
884 /* CAPI and device version */
885 iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
886 iif->ctr.version.minorversion = 0;
887 /* ToDo: check/assert cs->gotfwver? */
888 iif->ctr.version.majormanuversion = cs->fwver[0];
889 iif->ctr.version.minormanuversion = cs->fwver[1];
890 /* number of B channels supported */
891 iif->ctr.profile.nbchannel = cs->channels;
892 /* global options: internal controller, supplementary services */
893 iif->ctr.profile.goptions = 0x11;
894 /* B1 protocols: 64 kbit/s HDLC or transparent */
895 iif->ctr.profile.support1 = 0x03;
896 /* B2 protocols: transparent only */
897 /* ToDo: X.75 SLP ? */
898 iif->ctr.profile.support2 = 0x02;
899 /* B3 protocols: transparent only */
900 iif->ctr.profile.support3 = 0x01;
901 /* no serial number */
902 strcpy(iif->ctr.serial, "0");
903 capi_ctr_ready(&iif->ctr);
904 }
905
906 /**
907 * gigaset_isdn_stop() - signal device unavailability
908 * @cs: device descriptor structure.
909 *
910 * Called by main module to notify the LL that the device is no longer
911 * available for use.
912 */
913 void gigaset_isdn_stop(struct cardstate *cs)
914 {
915 struct gigaset_capi_ctr *iif = cs->iif;
916 capi_ctr_down(&iif->ctr);
917 }
918
919 /*
920 * kernel CAPI callback methods
921 * ============================
922 */
923
924 /*
925 * load firmware
926 */
927 static int gigaset_load_firmware(struct capi_ctr *ctr, capiloaddata *data)
928 {
929 struct cardstate *cs = ctr->driverdata;
930
931 /* AVM specific operation, not needed for Gigaset -- ignore */
932 dev_notice(cs->dev, "load_firmware ignored\n");
933
934 return 0;
935 }
936
937 /*
938 * reset (deactivate) controller
939 */
940 static void gigaset_reset_ctr(struct capi_ctr *ctr)
941 {
942 struct cardstate *cs = ctr->driverdata;
943
944 /* AVM specific operation, not needed for Gigaset -- ignore */
945 dev_notice(cs->dev, "reset_ctr ignored\n");
946 }
947
948 /*
949 * register CAPI application
950 */
951 static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
952 capi_register_params *rp)
953 {
954 struct gigaset_capi_ctr *iif
955 = container_of(ctr, struct gigaset_capi_ctr, ctr);
956 struct cardstate *cs = ctr->driverdata;
957 struct gigaset_capi_appl *ap;
958
959 list_for_each_entry(ap, &iif->appls, ctrlist)
960 if (ap->id == appl) {
961 dev_notice(cs->dev,
962 "application %u already registered\n", appl);
963 return;
964 }
965
966 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
967 if (!ap) {
968 dev_err(cs->dev, "%s: out of memory\n", __func__);
969 return;
970 }
971 ap->id = appl;
972
973 list_add(&ap->ctrlist, &iif->appls);
974 }
975
976 /*
977 * release CAPI application
978 */
979 static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
980 {
981 struct gigaset_capi_ctr *iif
982 = container_of(ctr, struct gigaset_capi_ctr, ctr);
983 struct cardstate *cs = iif->ctr.driverdata;
984 struct gigaset_capi_appl *ap, *tmp;
985
986 list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
987 if (ap->id == appl) {
988 if (ap->connected != APCONN_NONE) {
989 dev_err(cs->dev,
990 "%s: application %u still connected\n",
991 __func__, ap->id);
992 /* ToDo: clear active connection */
993 }
994 list_del(&ap->ctrlist);
995 kfree(ap);
996 }
997
998 }
999
1000 /*
1001 * =====================================================================
1002 * outgoing CAPI message handler
1003 * =====================================================================
1004 */
1005
1006 /*
1007 * helper function: emit reply message with given Info value
1008 */
1009 static void send_conf(struct gigaset_capi_ctr *iif,
1010 struct gigaset_capi_appl *ap,
1011 struct sk_buff *skb,
1012 u16 info)
1013 {
1014 /*
1015 * _CONF replies always only have NCCI and Info parameters
1016 * so they'll fit into the _REQ message skb
1017 */
1018 capi_cmsg_answer(&iif->acmsg);
1019 iif->acmsg.Info = info;
1020 capi_cmsg2message(&iif->acmsg, skb->data);
1021 __skb_trim(skb, CAPI_STDCONF_LEN);
1022 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1023 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1024 }
1025
1026 /*
1027 * process FACILITY_REQ message
1028 */
1029 static void do_facility_req(struct gigaset_capi_ctr *iif,
1030 struct gigaset_capi_appl *ap,
1031 struct sk_buff *skb)
1032 {
1033 struct cardstate *cs = iif->ctr.driverdata;
1034 _cmsg *cmsg = &iif->acmsg;
1035 struct sk_buff *cskb;
1036 u8 *pparam;
1037 unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
1038 u16 function, info;
1039 static u8 confparam[10]; /* max. 9 octets + length byte */
1040
1041 /* decode message */
1042 capi_message2cmsg(cmsg, skb->data);
1043 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1044
1045 /*
1046 * Facility Request Parameter is not decoded by capi_message2cmsg()
1047 * encoding depends on Facility Selector
1048 */
1049 switch (cmsg->FacilitySelector) {
1050 case CAPI_FACILITY_DTMF: /* ToDo */
1051 info = CapiFacilityNotSupported;
1052 confparam[0] = 2; /* length */
1053 /* DTMF information: Unknown DTMF request */
1054 capimsg_setu16(confparam, 1, 2);
1055 break;
1056
1057 case CAPI_FACILITY_V42BIS: /* not supported */
1058 info = CapiFacilityNotSupported;
1059 confparam[0] = 2; /* length */
1060 /* V.42 bis information: not available */
1061 capimsg_setu16(confparam, 1, 1);
1062 break;
1063
1064 case CAPI_FACILITY_SUPPSVC:
1065 /* decode Function parameter */
1066 pparam = cmsg->FacilityRequestParameter;
1067 if (pparam == NULL || *pparam < 2) {
1068 dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
1069 "Facility Request Parameter");
1070 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1071 return;
1072 }
1073 function = CAPIMSG_U16(pparam, 1);
1074 switch (function) {
1075 case CAPI_SUPPSVC_GETSUPPORTED:
1076 info = CapiSuccess;
1077 /* Supplementary Service specific parameter */
1078 confparam[3] = 6; /* length */
1079 /* Supplementary services info: Success */
1080 capimsg_setu16(confparam, 4, CapiSuccess);
1081 /* Supported Services: none */
1082 capimsg_setu32(confparam, 6, 0);
1083 break;
1084 /* ToDo: add supported services */
1085 default:
1086 info = CapiFacilitySpecificFunctionNotSupported;
1087 /* Supplementary Service specific parameter */
1088 confparam[3] = 2; /* length */
1089 /* Supplementary services info: not supported */
1090 capimsg_setu16(confparam, 4,
1091 CapiSupplementaryServiceNotSupported);
1092 }
1093
1094 /* Facility confirmation parameter */
1095 confparam[0] = confparam[3] + 3; /* total length */
1096 /* Function: copy from _REQ message */
1097 capimsg_setu16(confparam, 1, function);
1098 /* Supplementary Service specific parameter already set above */
1099 break;
1100
1101 case CAPI_FACILITY_WAKEUP: /* ToDo */
1102 info = CapiFacilityNotSupported;
1103 confparam[0] = 2; /* length */
1104 /* Number of accepted awake request parameters: 0 */
1105 capimsg_setu16(confparam, 1, 0);
1106 break;
1107
1108 default:
1109 info = CapiFacilityNotSupported;
1110 confparam[0] = 0; /* empty struct */
1111 }
1112
1113 /* send FACILITY_CONF with given Info and confirmation parameter */
1114 capi_cmsg_answer(cmsg);
1115 cmsg->Info = info;
1116 cmsg->FacilityConfirmationParameter = confparam;
1117 msgsize += confparam[0]; /* length */
1118 cskb = alloc_skb(msgsize, GFP_ATOMIC);
1119 if (!cskb) {
1120 dev_err(cs->dev, "%s: out of memory\n", __func__);
1121 return;
1122 }
1123 capi_cmsg2message(cmsg, __skb_put(cskb, msgsize));
1124 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1125 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
1126 }
1127
1128
1129 /*
1130 * process LISTEN_REQ message
1131 * just store the masks in the application data structure
1132 */
1133 static void do_listen_req(struct gigaset_capi_ctr *iif,
1134 struct gigaset_capi_appl *ap,
1135 struct sk_buff *skb)
1136 {
1137 /* decode message */
1138 capi_message2cmsg(&iif->acmsg, skb->data);
1139 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1140
1141 /* store listening parameters */
1142 ap->listenInfoMask = iif->acmsg.InfoMask;
1143 ap->listenCIPmask = iif->acmsg.CIPmask;
1144 send_conf(iif, ap, skb, CapiSuccess);
1145 }
1146
1147 /*
1148 * process ALERT_REQ message
1149 * nothing to do, Gigaset always alerts anyway
1150 */
1151 static void do_alert_req(struct gigaset_capi_ctr *iif,
1152 struct gigaset_capi_appl *ap,
1153 struct sk_buff *skb)
1154 {
1155 /* decode message */
1156 capi_message2cmsg(&iif->acmsg, skb->data);
1157 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1158 send_conf(iif, ap, skb, CapiAlertAlreadySent);
1159 }
1160
1161 /*
1162 * process CONNECT_REQ message
1163 * allocate a B channel, prepare dial commands, queue a DIAL event,
1164 * emit CONNECT_CONF reply
1165 */
1166 static void do_connect_req(struct gigaset_capi_ctr *iif,
1167 struct gigaset_capi_appl *ap,
1168 struct sk_buff *skb)
1169 {
1170 struct cardstate *cs = iif->ctr.driverdata;
1171 _cmsg *cmsg = &iif->acmsg;
1172 struct bc_state *bcs;
1173 char **commands;
1174 char *s;
1175 u8 *pp;
1176 int i, l;
1177 u16 info;
1178
1179 /* decode message */
1180 capi_message2cmsg(cmsg, skb->data);
1181 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1182
1183 /* get free B channel & construct PLCI */
1184 bcs = gigaset_get_free_channel(cs);
1185 if (!bcs) {
1186 dev_notice(cs->dev, "%s: no B channel available\n",
1187 "CONNECT_REQ");
1188 send_conf(iif, ap, skb, CapiNoPlciAvailable);
1189 return;
1190 }
1191 ap->bcnext = NULL;
1192 bcs->ap = ap;
1193 cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
1194
1195 /* build command table */
1196 commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
1197 if (!commands)
1198 goto oom;
1199
1200 /* encode parameter: Called party number */
1201 pp = cmsg->CalledPartyNumber;
1202 if (pp == NULL || *pp == 0) {
1203 dev_notice(cs->dev, "%s: %s missing\n",
1204 "CONNECT_REQ", "Called party number");
1205 info = CapiIllMessageParmCoding;
1206 goto error;
1207 }
1208 l = *pp++;
1209 /* check type of number/numbering plan byte */
1210 switch (*pp) {
1211 case 0x80: /* unknown type / unknown numbering plan */
1212 case 0x81: /* unknown type / ISDN/Telephony numbering plan */
1213 break;
1214 default: /* others: warn about potential misinterpretation */
1215 dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
1216 "CONNECT_REQ", "Called party number", *pp);
1217 }
1218 pp++;
1219 l--;
1220 /* translate "**" internal call prefix to CTP value */
1221 if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
1222 s = "^SCTP=0\r";
1223 pp += 2;
1224 l -= 2;
1225 } else {
1226 s = "^SCTP=1\r";
1227 }
1228 commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
1229 if (!commands[AT_TYPE])
1230 goto oom;
1231 commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
1232 if (!commands[AT_DIAL])
1233 goto oom;
1234 snprintf(commands[AT_DIAL], l+3, "D%.*s\r", l, pp);
1235
1236 /* encode parameter: Calling party number */
1237 pp = cmsg->CallingPartyNumber;
1238 if (pp != NULL && *pp > 0) {
1239 l = *pp++;
1240
1241 /* check type of number/numbering plan byte */
1242 /* ToDo: allow for/handle Ext=1? */
1243 switch (*pp) {
1244 case 0x00: /* unknown type / unknown numbering plan */
1245 case 0x01: /* unknown type / ISDN/Telephony num. plan */
1246 break;
1247 default:
1248 dev_notice(cs->dev,
1249 "%s: %s type/plan 0x%02x unsupported\n",
1250 "CONNECT_REQ", "Calling party number", *pp);
1251 }
1252 pp++;
1253 l--;
1254
1255 /* check presentation indicator */
1256 if (!l) {
1257 dev_notice(cs->dev, "%s: %s IE truncated\n",
1258 "CONNECT_REQ", "Calling party number");
1259 info = CapiIllMessageParmCoding;
1260 goto error;
1261 }
1262 switch (*pp & 0xfc) { /* ignore Screening indicator */
1263 case 0x80: /* Presentation allowed */
1264 s = "^SCLIP=1\r";
1265 break;
1266 case 0xa0: /* Presentation restricted */
1267 s = "^SCLIP=0\r";
1268 break;
1269 default:
1270 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1271 "CONNECT_REQ",
1272 "Presentation/Screening indicator",
1273 *pp);
1274 s = "^SCLIP=1\r";
1275 }
1276 commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
1277 if (!commands[AT_CLIP])
1278 goto oom;
1279 pp++;
1280 l--;
1281
1282 if (l) {
1283 /* number */
1284 commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
1285 if (!commands[AT_MSN])
1286 goto oom;
1287 snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
1288 }
1289 }
1290
1291 /* check parameter: CIP Value */
1292 if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
1293 (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
1294 dev_notice(cs->dev, "%s: unknown CIP value %d\n",
1295 "CONNECT_REQ", cmsg->CIPValue);
1296 info = CapiCipValueUnknown;
1297 goto error;
1298 }
1299
1300 /* check/encode parameter: BC */
1301 if (cmsg->BC && cmsg->BC[0]) {
1302 /* explicit BC overrides CIP */
1303 l = 2*cmsg->BC[0] + 7;
1304 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1305 if (!commands[AT_BC])
1306 goto oom;
1307 strcpy(commands[AT_BC], "^SBC=");
1308 decode_ie(cmsg->BC, commands[AT_BC]+5);
1309 strcpy(commands[AT_BC] + l - 2, "\r");
1310 } else if (cip2bchlc[cmsg->CIPValue].bc) {
1311 l = strlen(cip2bchlc[cmsg->CIPValue].bc) + 7;
1312 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1313 if (!commands[AT_BC])
1314 goto oom;
1315 snprintf(commands[AT_BC], l, "^SBC=%s\r",
1316 cip2bchlc[cmsg->CIPValue].bc);
1317 }
1318
1319 /* check/encode parameter: HLC */
1320 if (cmsg->HLC && cmsg->HLC[0]) {
1321 /* explicit HLC overrides CIP */
1322 l = 2*cmsg->HLC[0] + 7;
1323 commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
1324 if (!commands[AT_HLC])
1325 goto oom;
1326 strcpy(commands[AT_HLC], "^SHLC=");
1327 decode_ie(cmsg->HLC, commands[AT_HLC]+5);
1328 strcpy(commands[AT_HLC] + l - 2, "\r");
1329 } else if (cip2bchlc[cmsg->CIPValue].hlc) {
1330 l = strlen(cip2bchlc[cmsg->CIPValue].hlc) + 7;
1331 commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
1332 if (!commands[AT_HLC])
1333 goto oom;
1334 snprintf(commands[AT_HLC], l, "^SHLC=%s\r",
1335 cip2bchlc[cmsg->CIPValue].hlc);
1336 }
1337
1338 /* check/encode parameter: B Protocol */
1339 if (cmsg->BProtocol == CAPI_DEFAULT) {
1340 bcs->proto2 = L2_HDLC;
1341 dev_warn(cs->dev,
1342 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1343 } else {
1344 switch (cmsg->B1protocol) {
1345 case 0:
1346 bcs->proto2 = L2_HDLC;
1347 break;
1348 case 1:
1349 bcs->proto2 = L2_BITSYNC;
1350 break;
1351 default:
1352 dev_warn(cs->dev,
1353 "B1 Protocol %u unsupported, using Transparent\n",
1354 cmsg->B1protocol);
1355 bcs->proto2 = L2_BITSYNC;
1356 }
1357 if (cmsg->B2protocol != 1)
1358 dev_warn(cs->dev,
1359 "B2 Protocol %u unsupported, using Transparent\n",
1360 cmsg->B2protocol);
1361 if (cmsg->B3protocol != 0)
1362 dev_warn(cs->dev,
1363 "B3 Protocol %u unsupported, using Transparent\n",
1364 cmsg->B3protocol);
1365 ignore_cstruct_param(cs, cmsg->B1configuration,
1366 "CONNECT_REQ", "B1 Configuration");
1367 ignore_cstruct_param(cs, cmsg->B2configuration,
1368 "CONNECT_REQ", "B2 Configuration");
1369 ignore_cstruct_param(cs, cmsg->B3configuration,
1370 "CONNECT_REQ", "B3 Configuration");
1371 }
1372 commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
1373 if (!commands[AT_PROTO])
1374 goto oom;
1375 snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
1376
1377 /* ToDo: check/encode remaining parameters */
1378 ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
1379 "CONNECT_REQ", "Called pty subaddr");
1380 ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
1381 "CONNECT_REQ", "Calling pty subaddr");
1382 ignore_cstruct_param(cs, cmsg->LLC,
1383 "CONNECT_REQ", "LLC");
1384 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1385 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1386 "CONNECT_REQ", "B Channel Information");
1387 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1388 "CONNECT_REQ", "Keypad Facility");
1389 ignore_cstruct_param(cs, cmsg->Useruserdata,
1390 "CONNECT_REQ", "User-User Data");
1391 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1392 "CONNECT_REQ", "Facility Data Array");
1393 }
1394
1395 /* encode parameter: B channel to use */
1396 commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
1397 if (!commands[AT_ISO])
1398 goto oom;
1399 snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
1400 (unsigned) bcs->channel + 1);
1401
1402 /* queue & schedule EV_DIAL event */
1403 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
1404 bcs->at_state.seq_index, NULL)) {
1405 info = CAPI_MSGOSRESOURCEERR;
1406 goto error;
1407 }
1408 gigaset_schedule_event(cs);
1409 ap->connected = APCONN_SETUP;
1410 send_conf(iif, ap, skb, CapiSuccess);
1411 return;
1412
1413 oom:
1414 dev_err(cs->dev, "%s: out of memory\n", __func__);
1415 info = CAPI_MSGOSRESOURCEERR;
1416 error:
1417 if (commands)
1418 for (i = 0; i < AT_NUM; i++)
1419 kfree(commands[i]);
1420 kfree(commands);
1421 gigaset_free_channel(bcs);
1422 send_conf(iif, ap, skb, info);
1423 }
1424
1425 /*
1426 * process CONNECT_RESP message
1427 * checks protocol parameters and queues an ACCEPT or HUP event
1428 */
1429 static void do_connect_resp(struct gigaset_capi_ctr *iif,
1430 struct gigaset_capi_appl *ap,
1431 struct sk_buff *skb)
1432 {
1433 struct cardstate *cs = iif->ctr.driverdata;
1434 _cmsg *cmsg = &iif->acmsg;
1435 struct bc_state *bcs;
1436 struct gigaset_capi_appl *oap;
1437 int channel;
1438
1439 /* decode message */
1440 capi_message2cmsg(cmsg, skb->data);
1441 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1442 dev_kfree_skb_any(skb);
1443
1444 /* extract and check channel number from PLCI */
1445 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1446 if (!channel || channel > cs->channels) {
1447 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1448 "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
1449 return;
1450 }
1451 bcs = cs->bcs + channel - 1;
1452
1453 switch (cmsg->Reject) {
1454 case 0: /* Accept */
1455 /* drop all competing applications, keep only this one */
1456 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1457 if (oap != ap)
1458 send_disconnect_ind(bcs, oap,
1459 CapiCallGivenToOtherApplication);
1460 ap->bcnext = NULL;
1461 bcs->ap = ap;
1462 bcs->chstate |= CHS_NOTIFY_LL;
1463
1464 /* check/encode B channel protocol */
1465 if (cmsg->BProtocol == CAPI_DEFAULT) {
1466 bcs->proto2 = L2_HDLC;
1467 dev_warn(cs->dev,
1468 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1469 } else {
1470 switch (cmsg->B1protocol) {
1471 case 0:
1472 bcs->proto2 = L2_HDLC;
1473 break;
1474 case 1:
1475 bcs->proto2 = L2_BITSYNC;
1476 break;
1477 default:
1478 dev_warn(cs->dev,
1479 "B1 Protocol %u unsupported, using Transparent\n",
1480 cmsg->B1protocol);
1481 bcs->proto2 = L2_BITSYNC;
1482 }
1483 if (cmsg->B2protocol != 1)
1484 dev_warn(cs->dev,
1485 "B2 Protocol %u unsupported, using Transparent\n",
1486 cmsg->B2protocol);
1487 if (cmsg->B3protocol != 0)
1488 dev_warn(cs->dev,
1489 "B3 Protocol %u unsupported, using Transparent\n",
1490 cmsg->B3protocol);
1491 ignore_cstruct_param(cs, cmsg->B1configuration,
1492 "CONNECT_RESP", "B1 Configuration");
1493 ignore_cstruct_param(cs, cmsg->B2configuration,
1494 "CONNECT_RESP", "B2 Configuration");
1495 ignore_cstruct_param(cs, cmsg->B3configuration,
1496 "CONNECT_RESP", "B3 Configuration");
1497 }
1498
1499 /* ToDo: check/encode remaining parameters */
1500 ignore_cstruct_param(cs, cmsg->ConnectedNumber,
1501 "CONNECT_RESP", "Connected Number");
1502 ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
1503 "CONNECT_RESP", "Connected Subaddress");
1504 ignore_cstruct_param(cs, cmsg->LLC,
1505 "CONNECT_RESP", "LLC");
1506 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1507 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1508 "CONNECT_RESP", "BChannel Information");
1509 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1510 "CONNECT_RESP", "Keypad Facility");
1511 ignore_cstruct_param(cs, cmsg->Useruserdata,
1512 "CONNECT_RESP", "User-User Data");
1513 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1514 "CONNECT_RESP", "Facility Data Array");
1515 }
1516
1517 /* Accept call */
1518 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1519 EV_ACCEPT, NULL, 0, NULL))
1520 return;
1521 gigaset_schedule_event(cs);
1522 return;
1523
1524 case 1: /* Ignore */
1525 /* send DISCONNECT_IND to this application */
1526 send_disconnect_ind(bcs, ap, 0);
1527
1528 /* remove it from the list of listening apps */
1529 if (bcs->ap == ap) {
1530 bcs->ap = ap->bcnext;
1531 if (bcs->ap == NULL)
1532 /* last one: stop ev-layer hupD notifications */
1533 bcs->chstate &= ~CHS_NOTIFY_LL;
1534 return;
1535 }
1536 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
1537 if (oap->bcnext == ap) {
1538 oap->bcnext = oap->bcnext->bcnext;
1539 return;
1540 }
1541 }
1542 dev_err(cs->dev, "%s: application %u not found\n",
1543 __func__, ap->id);
1544 return;
1545
1546 default: /* Reject */
1547 /* drop all competing applications, keep only this one */
1548 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1549 if (oap != ap)
1550 send_disconnect_ind(bcs, oap,
1551 CapiCallGivenToOtherApplication);
1552 ap->bcnext = NULL;
1553 bcs->ap = ap;
1554
1555 /* reject call - will trigger DISCONNECT_IND for this app */
1556 dev_info(cs->dev, "%s: Reject=%x\n",
1557 "CONNECT_RESP", cmsg->Reject);
1558 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1559 EV_HUP, NULL, 0, NULL))
1560 return;
1561 gigaset_schedule_event(cs);
1562 return;
1563 }
1564 }
1565
1566 /*
1567 * process CONNECT_B3_REQ message
1568 * build NCCI and emit CONNECT_B3_CONF reply
1569 */
1570 static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
1571 struct gigaset_capi_appl *ap,
1572 struct sk_buff *skb)
1573 {
1574 struct cardstate *cs = iif->ctr.driverdata;
1575 _cmsg *cmsg = &iif->acmsg;
1576 int channel;
1577
1578 /* decode message */
1579 capi_message2cmsg(cmsg, skb->data);
1580 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1581
1582 /* extract and check channel number from PLCI */
1583 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1584 if (!channel || channel > cs->channels) {
1585 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1586 "CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
1587 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1588 return;
1589 }
1590
1591 /* mark logical connection active */
1592 ap->connected = APCONN_ACTIVE;
1593
1594 /* build NCCI: always 1 (one B3 connection only) */
1595 cmsg->adr.adrNCCI |= 1 << 16;
1596
1597 /* NCPI parameter: not applicable for B3 Transparent */
1598 ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
1599 send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1600 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1601 }
1602
1603 /*
1604 * process CONNECT_B3_RESP message
1605 * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
1606 * or queue EV_HUP and emit DISCONNECT_B3_IND.
1607 * The emitted message is always shorter than the received one,
1608 * allowing to reuse the skb.
1609 */
1610 static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
1611 struct gigaset_capi_appl *ap,
1612 struct sk_buff *skb)
1613 {
1614 struct cardstate *cs = iif->ctr.driverdata;
1615 _cmsg *cmsg = &iif->acmsg;
1616 struct bc_state *bcs;
1617 int channel;
1618 unsigned int msgsize;
1619 u8 command;
1620
1621 /* decode message */
1622 capi_message2cmsg(cmsg, skb->data);
1623 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1624
1625 /* extract and check channel number and NCCI */
1626 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1627 if (!channel || channel > cs->channels ||
1628 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1629 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1630 "CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
1631 dev_kfree_skb_any(skb);
1632 return;
1633 }
1634 bcs = &cs->bcs[channel-1];
1635
1636 if (cmsg->Reject) {
1637 /* Reject: clear B3 connect received flag */
1638 ap->connected = APCONN_SETUP;
1639
1640 /* trigger hangup, causing eventual DISCONNECT_IND */
1641 if (!gigaset_add_event(cs, &bcs->at_state,
1642 EV_HUP, NULL, 0, NULL)) {
1643 dev_kfree_skb_any(skb);
1644 return;
1645 }
1646 gigaset_schedule_event(cs);
1647
1648 /* emit DISCONNECT_B3_IND */
1649 command = CAPI_DISCONNECT_B3;
1650 msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
1651 } else {
1652 /*
1653 * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
1654 * we only send CONNECT_B3_IND if the B channel is up
1655 */
1656 command = CAPI_CONNECT_B3_ACTIVE;
1657 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
1658 }
1659 capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
1660 ap->nextMessageNumber++, cmsg->adr.adrNCCI);
1661 __skb_trim(skb, msgsize);
1662 capi_cmsg2message(cmsg, skb->data);
1663 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1664 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1665 }
1666
1667 /*
1668 * process DISCONNECT_REQ message
1669 * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
1670 * emit DISCONNECT_CONF reply
1671 */
1672 static void do_disconnect_req(struct gigaset_capi_ctr *iif,
1673 struct gigaset_capi_appl *ap,
1674 struct sk_buff *skb)
1675 {
1676 struct cardstate *cs = iif->ctr.driverdata;
1677 _cmsg *cmsg = &iif->acmsg;
1678 struct bc_state *bcs;
1679 _cmsg *b3cmsg;
1680 struct sk_buff *b3skb;
1681 int channel;
1682
1683 /* decode message */
1684 capi_message2cmsg(cmsg, skb->data);
1685 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1686
1687 /* extract and check channel number from PLCI */
1688 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1689 if (!channel || channel > cs->channels) {
1690 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1691 "DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
1692 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1693 return;
1694 }
1695 bcs = cs->bcs + channel - 1;
1696
1697 /* ToDo: process parameter: Additional info */
1698 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1699 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1700 "DISCONNECT_REQ", "B Channel Information");
1701 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1702 "DISCONNECT_REQ", "Keypad Facility");
1703 ignore_cstruct_param(cs, cmsg->Useruserdata,
1704 "DISCONNECT_REQ", "User-User Data");
1705 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1706 "DISCONNECT_REQ", "Facility Data Array");
1707 }
1708
1709 /* skip if DISCONNECT_IND already sent */
1710 if (!ap->connected)
1711 return;
1712
1713 /* check for active logical connection */
1714 if (ap->connected >= APCONN_ACTIVE) {
1715 /*
1716 * emit DISCONNECT_B3_IND with cause 0x3301
1717 * use separate cmsg structure, as the content of iif->acmsg
1718 * is still needed for creating the _CONF message
1719 */
1720 b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
1721 if (!b3cmsg) {
1722 dev_err(cs->dev, "%s: out of memory\n", __func__);
1723 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1724 return;
1725 }
1726 capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
1727 ap->nextMessageNumber++,
1728 cmsg->adr.adrPLCI | (1 << 16));
1729 b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
1730 b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
1731 if (b3skb == NULL) {
1732 dev_err(cs->dev, "%s: out of memory\n", __func__);
1733 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1734 return;
1735 }
1736 capi_cmsg2message(b3cmsg,
1737 __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
1738 kfree(b3cmsg);
1739 capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
1740 }
1741
1742 /* trigger hangup, causing eventual DISCONNECT_IND */
1743 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1744 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1745 return;
1746 }
1747 gigaset_schedule_event(cs);
1748
1749 /* emit reply */
1750 send_conf(iif, ap, skb, CapiSuccess);
1751 }
1752
1753 /*
1754 * process DISCONNECT_B3_REQ message
1755 * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
1756 */
1757 static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
1758 struct gigaset_capi_appl *ap,
1759 struct sk_buff *skb)
1760 {
1761 struct cardstate *cs = iif->ctr.driverdata;
1762 _cmsg *cmsg = &iif->acmsg;
1763 int channel;
1764
1765 /* decode message */
1766 capi_message2cmsg(cmsg, skb->data);
1767 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1768
1769 /* extract and check channel number and NCCI */
1770 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1771 if (!channel || channel > cs->channels ||
1772 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1773 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1774 "DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
1775 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1776 return;
1777 }
1778
1779 /* reject if logical connection not active */
1780 if (ap->connected < APCONN_ACTIVE) {
1781 send_conf(iif, ap, skb,
1782 CapiMessageNotSupportedInCurrentState);
1783 return;
1784 }
1785
1786 /* trigger hangup, causing eventual DISCONNECT_B3_IND */
1787 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1788 EV_HUP, NULL, 0, NULL)) {
1789 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1790 return;
1791 }
1792 gigaset_schedule_event(cs);
1793
1794 /* NCPI parameter: not applicable for B3 Transparent */
1795 ignore_cstruct_param(cs, cmsg->NCPI,
1796 "DISCONNECT_B3_REQ", "NCPI");
1797 send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1798 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1799 }
1800
1801 /*
1802 * process DATA_B3_REQ message
1803 */
1804 static void do_data_b3_req(struct gigaset_capi_ctr *iif,
1805 struct gigaset_capi_appl *ap,
1806 struct sk_buff *skb)
1807 {
1808 struct cardstate *cs = iif->ctr.driverdata;
1809 int channel = CAPIMSG_PLCI_PART(skb->data);
1810 u16 ncci = CAPIMSG_NCCI_PART(skb->data);
1811 u16 msglen = CAPIMSG_LEN(skb->data);
1812 u16 datalen = CAPIMSG_DATALEN(skb->data);
1813 u16 flags = CAPIMSG_FLAGS(skb->data);
1814
1815 /* frequent message, avoid _cmsg overhead */
1816 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data);
1817
1818 gig_dbg(DEBUG_LLDATA,
1819 "Receiving data from LL (ch: %d, flg: %x, sz: %d|%d)",
1820 channel, flags, msglen, datalen);
1821
1822 /* check parameters */
1823 if (channel == 0 || channel > cs->channels || ncci != 1) {
1824 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1825 "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
1826 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1827 return;
1828 }
1829 if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
1830 dev_notice(cs->dev, "%s: unexpected length %d\n",
1831 "DATA_B3_REQ", msglen);
1832 if (msglen + datalen != skb->len)
1833 dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
1834 "DATA_B3_REQ", msglen, datalen, skb->len);
1835 if (msglen + datalen > skb->len) {
1836 /* message too short for announced data length */
1837 send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
1838 return;
1839 }
1840 if (flags & CAPI_FLAGS_RESERVED) {
1841 dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
1842 "DATA_B3_REQ", flags);
1843 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1844 return;
1845 }
1846
1847 /* reject if logical connection not active */
1848 if (ap->connected < APCONN_ACTIVE) {
1849 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1850 return;
1851 }
1852
1853 /* pull CAPI message into link layer header */
1854 skb_reset_mac_header(skb);
1855 skb->mac_len = msglen;
1856 skb_pull(skb, msglen);
1857
1858 /* pass to device-specific module */
1859 if (cs->ops->send_skb(&cs->bcs[channel-1], skb) < 0) {
1860 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1861 return;
1862 }
1863
1864 /* DATA_B3_CONF reply will be sent by gigaset_skb_sent() */
1865
1866 /*
1867 * ToDo: honor unset "delivery confirmation" bit
1868 * (send DATA_B3_CONF immediately?)
1869 */
1870 }
1871
1872 /*
1873 * process RESET_B3_REQ message
1874 * just always reply "not supported by current protocol"
1875 */
1876 static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
1877 struct gigaset_capi_appl *ap,
1878 struct sk_buff *skb)
1879 {
1880 /* decode message */
1881 capi_message2cmsg(&iif->acmsg, skb->data);
1882 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1883 send_conf(iif, ap, skb,
1884 CapiResetProcedureNotSupportedByCurrentProtocol);
1885 }
1886
1887 /*
1888 * dump unsupported/ignored messages at most twice per minute,
1889 * some apps send those very frequently
1890 */
1891 static unsigned long ignored_msg_dump_time;
1892
1893 /*
1894 * unsupported CAPI message handler
1895 */
1896 static void do_unsupported(struct gigaset_capi_ctr *iif,
1897 struct gigaset_capi_appl *ap,
1898 struct sk_buff *skb)
1899 {
1900 /* decode message */
1901 capi_message2cmsg(&iif->acmsg, skb->data);
1902 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
1903 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1904 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1905 }
1906
1907 /*
1908 * CAPI message handler: no-op
1909 */
1910 static void do_nothing(struct gigaset_capi_ctr *iif,
1911 struct gigaset_capi_appl *ap,
1912 struct sk_buff *skb)
1913 {
1914 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
1915 /* decode message */
1916 capi_message2cmsg(&iif->acmsg, skb->data);
1917 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1918 }
1919 dev_kfree_skb_any(skb);
1920 }
1921
1922 static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
1923 struct gigaset_capi_appl *ap,
1924 struct sk_buff *skb)
1925 {
1926 dump_rawmsg(DEBUG_LLDATA, __func__, skb->data);
1927 dev_kfree_skb_any(skb);
1928 }
1929
1930 /* table of outgoing CAPI message handlers with lookup function */
1931 typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
1932 struct gigaset_capi_appl *,
1933 struct sk_buff *);
1934
1935 static struct {
1936 u16 cmd;
1937 capi_send_handler_t handler;
1938 } capi_send_handler_table[] = {
1939 /* most frequent messages first for faster lookup */
1940 { CAPI_DATA_B3_REQ, do_data_b3_req },
1941 { CAPI_DATA_B3_RESP, do_data_b3_resp },
1942
1943 { CAPI_ALERT_REQ, do_alert_req },
1944 { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
1945 { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
1946 { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
1947 { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
1948 { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
1949 { CAPI_CONNECT_REQ, do_connect_req },
1950 { CAPI_CONNECT_RESP, do_connect_resp },
1951 { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
1952 { CAPI_DISCONNECT_B3_RESP, do_nothing },
1953 { CAPI_DISCONNECT_REQ, do_disconnect_req },
1954 { CAPI_DISCONNECT_RESP, do_nothing },
1955 { CAPI_FACILITY_REQ, do_facility_req },
1956 { CAPI_FACILITY_RESP, do_nothing },
1957 { CAPI_LISTEN_REQ, do_listen_req },
1958 { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
1959 { CAPI_RESET_B3_REQ, do_reset_b3_req },
1960 { CAPI_RESET_B3_RESP, do_nothing },
1961
1962 /*
1963 * ToDo: support overlap sending (requires ev-layer state
1964 * machine extension to generate additional ATD commands)
1965 */
1966 { CAPI_INFO_REQ, do_unsupported },
1967 { CAPI_INFO_RESP, do_nothing },
1968
1969 /*
1970 * ToDo: what's the proper response for these?
1971 */
1972 { CAPI_MANUFACTURER_REQ, do_nothing },
1973 { CAPI_MANUFACTURER_RESP, do_nothing },
1974 };
1975
1976 /* look up handler */
1977 static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
1978 {
1979 size_t i;
1980
1981 for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
1982 if (capi_send_handler_table[i].cmd == cmd)
1983 return capi_send_handler_table[i].handler;
1984 return NULL;
1985 }
1986
1987
1988 /**
1989 * gigaset_send_message() - accept a CAPI message from an application
1990 * @ctr: controller descriptor structure.
1991 * @skb: CAPI message.
1992 *
1993 * Return value: CAPI error code
1994 * Note: capidrv (and probably others, too) only uses the return value to
1995 * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
1996 */
1997 static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
1998 {
1999 struct gigaset_capi_ctr *iif
2000 = container_of(ctr, struct gigaset_capi_ctr, ctr);
2001 struct cardstate *cs = ctr->driverdata;
2002 struct gigaset_capi_appl *ap;
2003 capi_send_handler_t handler;
2004
2005 /* can only handle linear sk_buffs */
2006 if (skb_linearize(skb) < 0) {
2007 dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
2008 return CAPI_MSGOSRESOURCEERR;
2009 }
2010
2011 /* retrieve application data structure */
2012 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2013 if (!ap) {
2014 dev_notice(cs->dev, "%s: application %u not registered\n",
2015 __func__, CAPIMSG_APPID(skb->data));
2016 return CAPI_ILLAPPNR;
2017 }
2018
2019 /* look up command */
2020 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2021 if (!handler) {
2022 /* unknown/unsupported message type */
2023 if (printk_ratelimit())
2024 dev_notice(cs->dev, "%s: unsupported message %u\n",
2025 __func__, CAPIMSG_CMD(skb->data));
2026 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
2027 }
2028
2029 /* serialize */
2030 if (atomic_add_return(1, &iif->sendqlen) > 1) {
2031 /* queue behind other messages */
2032 skb_queue_tail(&iif->sendqueue, skb);
2033 return CAPI_NOERROR;
2034 }
2035
2036 /* process message */
2037 handler(iif, ap, skb);
2038
2039 /* process other messages arrived in the meantime */
2040 while (atomic_sub_return(1, &iif->sendqlen) > 0) {
2041 skb = skb_dequeue(&iif->sendqueue);
2042 if (!skb) {
2043 /* should never happen */
2044 dev_err(cs->dev, "%s: send queue empty\n", __func__);
2045 continue;
2046 }
2047 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2048 if (!ap) {
2049 /* could that happen? */
2050 dev_warn(cs->dev, "%s: application %u vanished\n",
2051 __func__, CAPIMSG_APPID(skb->data));
2052 continue;
2053 }
2054 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2055 if (!handler) {
2056 /* should never happen */
2057 dev_err(cs->dev, "%s: handler %x vanished\n",
2058 __func__, CAPIMSG_CMD(skb->data));
2059 continue;
2060 }
2061 handler(iif, ap, skb);
2062 }
2063
2064 return CAPI_NOERROR;
2065 }
2066
2067 /**
2068 * gigaset_procinfo() - build single line description for controller
2069 * @ctr: controller descriptor structure.
2070 *
2071 * Return value: pointer to generated string (null terminated)
2072 */
2073 static char *gigaset_procinfo(struct capi_ctr *ctr)
2074 {
2075 return ctr->name; /* ToDo: more? */
2076 }
2077
2078 static int gigaset_proc_show(struct seq_file *m, void *v)
2079 {
2080 struct capi_ctr *ctr = m->private;
2081 struct cardstate *cs = ctr->driverdata;
2082 char *s;
2083 int i;
2084
2085 seq_printf(m, "%-16s %s\n", "name", ctr->name);
2086 seq_printf(m, "%-16s %s %s\n", "dev",
2087 dev_driver_string(cs->dev), dev_name(cs->dev));
2088 seq_printf(m, "%-16s %d\n", "id", cs->myid);
2089 if (cs->gotfwver)
2090 seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
2091 cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
2092 seq_printf(m, "%-16s %d\n", "channels", cs->channels);
2093 seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
2094
2095 switch (cs->mode) {
2096 case M_UNKNOWN:
2097 s = "unknown";
2098 break;
2099 case M_CONFIG:
2100 s = "config";
2101 break;
2102 case M_UNIMODEM:
2103 s = "Unimodem";
2104 break;
2105 case M_CID:
2106 s = "CID";
2107 break;
2108 default:
2109 s = "??";
2110 }
2111 seq_printf(m, "%-16s %s\n", "mode", s);
2112
2113 switch (cs->mstate) {
2114 case MS_UNINITIALIZED:
2115 s = "uninitialized";
2116 break;
2117 case MS_INIT:
2118 s = "init";
2119 break;
2120 case MS_LOCKED:
2121 s = "locked";
2122 break;
2123 case MS_SHUTDOWN:
2124 s = "shutdown";
2125 break;
2126 case MS_RECOVER:
2127 s = "recover";
2128 break;
2129 case MS_READY:
2130 s = "ready";
2131 break;
2132 default:
2133 s = "??";
2134 }
2135 seq_printf(m, "%-16s %s\n", "mstate", s);
2136
2137 seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
2138 seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
2139 seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
2140 seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
2141
2142 for (i = 0; i < cs->channels; i++) {
2143 seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
2144 cs->bcs[i].corrupted);
2145 seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
2146 cs->bcs[i].trans_down);
2147 seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
2148 cs->bcs[i].trans_up);
2149 seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
2150 cs->bcs[i].chstate);
2151 switch (cs->bcs[i].proto2) {
2152 case L2_BITSYNC:
2153 s = "bitsync";
2154 break;
2155 case L2_HDLC:
2156 s = "HDLC";
2157 break;
2158 case L2_VOICE:
2159 s = "voice";
2160 break;
2161 default:
2162 s = "??";
2163 }
2164 seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
2165 }
2166 return 0;
2167 }
2168
2169 static int gigaset_proc_open(struct inode *inode, struct file *file)
2170 {
2171 return single_open(file, gigaset_proc_show, PDE(inode)->data);
2172 }
2173
2174 static const struct file_operations gigaset_proc_fops = {
2175 .owner = THIS_MODULE,
2176 .open = gigaset_proc_open,
2177 .read = seq_read,
2178 .llseek = seq_lseek,
2179 .release = single_release,
2180 };
2181
2182 /**
2183 * gigaset_isdn_regdev() - register device to LL
2184 * @cs: device descriptor structure.
2185 * @isdnid: device name.
2186 *
2187 * Return value: 1 for success, 0 for failure
2188 */
2189 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
2190 {
2191 struct gigaset_capi_ctr *iif;
2192 int rc;
2193
2194 iif = kmalloc(sizeof(*iif), GFP_KERNEL);
2195 if (!iif) {
2196 pr_err("%s: out of memory\n", __func__);
2197 return 0;
2198 }
2199
2200 /* prepare controller structure */
2201 iif->ctr.owner = THIS_MODULE;
2202 iif->ctr.driverdata = cs;
2203 strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
2204 iif->ctr.driver_name = "gigaset";
2205 iif->ctr.load_firmware = gigaset_load_firmware;
2206 iif->ctr.reset_ctr = gigaset_reset_ctr;
2207 iif->ctr.register_appl = gigaset_register_appl;
2208 iif->ctr.release_appl = gigaset_release_appl;
2209 iif->ctr.send_message = gigaset_send_message;
2210 iif->ctr.procinfo = gigaset_procinfo;
2211 iif->ctr.proc_fops = &gigaset_proc_fops;
2212 INIT_LIST_HEAD(&iif->appls);
2213 skb_queue_head_init(&iif->sendqueue);
2214 atomic_set(&iif->sendqlen, 0);
2215
2216 /* register controller with CAPI */
2217 rc = attach_capi_ctr(&iif->ctr);
2218 if (rc) {
2219 pr_err("attach_capi_ctr failed (%d)\n", rc);
2220 kfree(iif);
2221 return 0;
2222 }
2223
2224 cs->iif = iif;
2225 cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
2226 return 1;
2227 }
2228
2229 /**
2230 * gigaset_isdn_unregdev() - unregister device from LL
2231 * @cs: device descriptor structure.
2232 */
2233 void gigaset_isdn_unregdev(struct cardstate *cs)
2234 {
2235 struct gigaset_capi_ctr *iif = cs->iif;
2236
2237 detach_capi_ctr(&iif->ctr);
2238 kfree(iif);
2239 cs->iif = NULL;
2240 }
2241
2242 static struct capi_driver capi_driver_gigaset = {
2243 .name = "gigaset",
2244 .revision = "1.0",
2245 };
2246
2247 /**
2248 * gigaset_isdn_regdrv() - register driver to LL
2249 */
2250 void gigaset_isdn_regdrv(void)
2251 {
2252 pr_info("Kernel CAPI interface\n");
2253 register_capi_driver(&capi_driver_gigaset);
2254 }
2255
2256 /**
2257 * gigaset_isdn_unregdrv() - unregister driver from LL
2258 */
2259 void gigaset_isdn_unregdrv(void)
2260 {
2261 unregister_capi_driver(&capi_driver_gigaset);
2262 }
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