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authorTilman Schmidt <tilman@imap.cc>2009-10-06 08:19:17 -0400
committerDavid S. Miller <davem@davemloft.net>2009-10-07 01:43:53 -0400
commit7bb5fdc2fb021e32703ed1ff0269876bde1fa962 (patch)
tree818c29b7ed3ece19165d317050c333bab9f7fadb /drivers/isdn/gigaset/capi.c
parentaaba2b3f8213e1d66e71c351fa7a2b1cbd974d3c (diff)
gigaset: add Kernel CAPI interface (v3)
Add a Kernel CAPI interface to the Gigaset driver. Impact: optional new functionality Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn/gigaset/capi.c')
-rw-r--r--drivers/isdn/gigaset/capi.c2273
1 files changed, 2273 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c
new file mode 100644
index 000000000000..c276a925b36f
--- /dev/null
+++ b/drivers/isdn/gigaset/capi.c
@@ -0,0 +1,2273 @@
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
171static inline void ignore_cmstruct_param(struct cardstate *cs, _cmstruct param,
172 char *msgname, char *paramname)
173{
174 if (param != CAPI_DEFAULT)
175 dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
176 msgname, paramname);
177}
178
179/*
180 * check for legal hex digit
181 */
182static inline int ishexdigit(char c)
183{
184 if (c >= '0' && c <= '9')
185 return 1;
186 if (c >= 'A' && c <= 'F')
187 return 1;
188 if (c >= 'a' && c <= 'f')
189 return 1;
190 return 0;
191}
192
193/*
194 * convert hex to binary
195 */
196static inline u8 hex2bin(char c)
197{
198 int result = c & 0x0f;
199 if (c & 0x40)
200 result += 9;
201 return result;
202}
203
204/*
205 * convert an IE from Gigaset hex string to ETSI binary representation
206 * including length byte
207 * return value: result length, -1 on error
208 */
209static int encode_ie(char *in, u8 *out, int maxlen)
210{
211 int l = 0;
212 while (*in) {
213 if (!ishexdigit(in[0]) || !ishexdigit(in[1]) || l >= maxlen)
214 return -1;
215 out[++l] = (hex2bin(in[0]) << 4) + hex2bin(in[1]);
216 in += 2;
217 }
218 out[0] = l;
219 return l;
220}
221
222/*
223 * convert an IE from ETSI binary representation including length byte
224 * to Gigaset hex string
225 */
226static void decode_ie(u8 *in, char *out)
227{
228 int i = *in;
229 while (i-- > 0) {
230 /* ToDo: conversion to upper case necessary? */
231 *out++ = toupper(hex_asc_hi(*++in));
232 *out++ = toupper(hex_asc_lo(*in));
233 }
234}
235
236/*
237 * retrieve application data structure for an application ID
238 */
239static inline struct gigaset_capi_appl *
240get_appl(struct gigaset_capi_ctr *iif, u16 appl)
241{
242 struct gigaset_capi_appl *ap;
243
244 list_for_each_entry(ap, &iif->appls, ctrlist)
245 if (ap->id == appl)
246 return ap;
247 return NULL;
248}
249
250/*
251 * dump CAPI message to kernel messages for debugging
252 */
253static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
254{
255#ifdef CONFIG_GIGASET_DEBUG
256 _cdebbuf *cdb;
257
258 if (!(gigaset_debuglevel & level))
259 return;
260
261 cdb = capi_cmsg2str(p);
262 if (cdb) {
263 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
264 cdebbuf_free(cdb);
265 } else {
266 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
267 capi_cmd2str(p->Command, p->Subcommand));
268 }
269#endif
270}
271
272static inline void dump_rawmsg(enum debuglevel level, const char *tag,
273 unsigned char *data)
274{
275#ifdef CONFIG_GIGASET_DEBUG
276 char *dbgline;
277 int i, l;
278
279 if (!(gigaset_debuglevel & level))
280 return;
281
282 l = CAPIMSG_LEN(data);
283 if (l < 12) {
284 gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
285 return;
286 }
287 gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
288 tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
289 CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
290 CAPIMSG_CONTROL(data));
291 l -= 12;
292 dbgline = kmalloc(3*l, GFP_ATOMIC);
293 if (!dbgline)
294 return;
295 for (i = 0; i < l; i++) {
296 dbgline[3*i] = hex_asc_hi(data[12+i]);
297 dbgline[3*i+1] = hex_asc_lo(data[12+i]);
298 dbgline[3*i+2] = ' ';
299 }
300 dbgline[3*l-1] = '\0';
301 gig_dbg(level, " %s", dbgline);
302 kfree(dbgline);
303 if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
304 (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
305 CAPIMSG_SUBCOMMAND(data) == CAPI_IND) &&
306 CAPIMSG_DATALEN(data) > 0) {
307 l = CAPIMSG_DATALEN(data);
308 dbgline = kmalloc(3*l, GFP_ATOMIC);
309 if (!dbgline)
310 return;
311 data += CAPIMSG_LEN(data);
312 for (i = 0; i < l; i++) {
313 dbgline[3*i] = hex_asc_hi(data[i]);
314 dbgline[3*i+1] = hex_asc_lo(data[i]);
315 dbgline[3*i+2] = ' ';
316 }
317 dbgline[3*l-1] = '\0';
318 gig_dbg(level, " %s", dbgline);
319 kfree(dbgline);
320 }
321#endif
322}
323
324/*
325 * format CAPI IE as string
326 */
327
328static const char *format_ie(const char *ie)
329{
330 static char result[3*MAX_FMT_IE_LEN];
331 int len, count;
332 char *pout = result;
333
334 if (!ie)
335 return "NULL";
336
337 count = len = ie[0];
338 if (count > MAX_FMT_IE_LEN)
339 count = MAX_FMT_IE_LEN-1;
340 while (count--) {
341 *pout++ = hex_asc_hi(*++ie);
342 *pout++ = hex_asc_lo(*ie);
343 *pout++ = ' ';
344 }
345 if (len > MAX_FMT_IE_LEN) {
346 *pout++ = '.';
347 *pout++ = '.';
348 *pout++ = '.';
349 }
350 *--pout = 0;
351 return result;
352}
353
354
355/*
356 * driver interface functions
357 * ==========================
358 */
359
360/**
361 * gigaset_skb_sent() - acknowledge transmission of outgoing skb
362 * @bcs: B channel descriptor structure.
363 * @skb: sent data.
364 *
365 * Called by hardware module {bas,ser,usb}_gigaset when the data in a
366 * skb has been successfully sent, for signalling completion to the LL.
367 */
368void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
369{
370 struct cardstate *cs = bcs->cs;
371 struct gigaset_capi_ctr *iif = cs->iif;
372 struct gigaset_capi_appl *ap = bcs->ap;
373 struct sk_buff *cskb;
374 u16 flags;
375
376 /* update statistics */
377 ++bcs->trans_up;
378
379 if (!ap) {
380 dev_err(cs->dev, "%s: no application\n", __func__);
381 return;
382 }
383
384 /* don't send further B3 messages if disconnected */
385 if (ap->connected < APCONN_ACTIVE) {
386 gig_dbg(DEBUG_LLDATA, "disconnected, discarding ack");
387 return;
388 }
389
390 /* ToDo: honor unset "delivery confirmation" bit */
391 flags = CAPIMSG_FLAGS(dskb->head);
392
393 /* build DATA_B3_CONF message */
394 cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
395 if (!cskb) {
396 dev_err(cs->dev, "%s: out of memory\n", __func__);
397 return;
398 }
399 /* frequent message, avoid _cmsg overhead */
400 CAPIMSG_SETLEN(cskb->data, CAPI_DATA_B3_CONF_LEN);
401 CAPIMSG_SETAPPID(cskb->data, ap->id);
402 CAPIMSG_SETCOMMAND(cskb->data, CAPI_DATA_B3);
403 CAPIMSG_SETSUBCOMMAND(cskb->data, CAPI_CONF);
404 CAPIMSG_SETMSGID(cskb->data, CAPIMSG_MSGID(dskb->head));
405 CAPIMSG_SETCONTROLLER(cskb->data, iif->ctr.cnr);
406 CAPIMSG_SETPLCI_PART(cskb->data, bcs->channel + 1);
407 CAPIMSG_SETNCCI_PART(cskb->data, 1);
408 CAPIMSG_SETHANDLE_CONF(cskb->data, CAPIMSG_HANDLE_REQ(dskb->head));
409 if (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION)
410 CAPIMSG_SETINFO_CONF(cskb->data,
411 CapiFlagsNotSupportedByProtocol);
412 else
413 CAPIMSG_SETINFO_CONF(cskb->data, CAPI_NOERROR);
414
415 /* emit message */
416 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_CONF", cskb->data);
417 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
418}
419EXPORT_SYMBOL_GPL(gigaset_skb_sent);
420
421/**
422 * gigaset_skb_rcvd() - pass received skb to LL
423 * @bcs: B channel descriptor structure.
424 * @skb: received data.
425 *
426 * Called by hardware module {bas,ser,usb}_gigaset when user data has
427 * been successfully received, for passing to the LL.
428 * Warning: skb must not be accessed anymore!
429 */
430void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
431{
432 struct cardstate *cs = bcs->cs;
433 struct gigaset_capi_ctr *iif = cs->iif;
434 struct gigaset_capi_appl *ap = bcs->ap;
435 int len = skb->len;
436
437 /* update statistics */
438 bcs->trans_down++;
439
440 if (!ap) {
441 dev_err(cs->dev, "%s: no application\n", __func__);
442 return;
443 }
444
445 /* don't send further B3 messages if disconnected */
446 if (ap->connected < APCONN_ACTIVE) {
447 gig_dbg(DEBUG_LLDATA, "disconnected, discarding data");
448 dev_kfree_skb(skb);
449 return;
450 }
451
452 /*
453 * prepend DATA_B3_IND message to payload
454 * Parameters: NCCI = 1, all others 0/unused
455 * frequent message, avoid _cmsg overhead
456 */
457 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
458 CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
459 CAPIMSG_SETAPPID(skb->data, ap->id);
460 CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
461 CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
462 CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
463 CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
464 CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
465 CAPIMSG_SETNCCI_PART(skb->data, 1);
466 /* Data parameter not used */
467 CAPIMSG_SETDATALEN(skb->data, len);
468 /* Data handle parameter not used */
469 CAPIMSG_SETFLAGS(skb->data, 0);
470 /* Data64 parameter not present */
471
472 /* emit message */
473 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_IND", skb->data);
474 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
475}
476EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
477
478/**
479 * gigaset_isdn_rcv_err() - signal receive error
480 * @bcs: B channel descriptor structure.
481 *
482 * Called by hardware module {bas,ser,usb}_gigaset when a receive error
483 * has occurred, for signalling to the LL.
484 */
485void gigaset_isdn_rcv_err(struct bc_state *bcs)
486{
487 /* if currently ignoring packets, just count down */
488 if (bcs->ignore) {
489 bcs->ignore--;
490 return;
491 }
492
493 /* update statistics */
494 bcs->corrupted++;
495
496 /* ToDo: signal error -> LL */
497}
498EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
499
500/**
501 * gigaset_isdn_icall() - signal incoming call
502 * @at_state: connection state structure.
503 *
504 * Called by main module at tasklet level to notify the LL that an incoming
505 * call has been received. @at_state contains the parameters of the call.
506 *
507 * Return value: call disposition (ICALL_*)
508 */
509int gigaset_isdn_icall(struct at_state_t *at_state)
510{
511 struct cardstate *cs = at_state->cs;
512 struct bc_state *bcs = at_state->bcs;
513 struct gigaset_capi_ctr *iif = cs->iif;
514 struct gigaset_capi_appl *ap;
515 u32 actCIPmask;
516 struct sk_buff *skb;
517 unsigned int msgsize;
518 int i;
519
520 /*
521 * ToDo: signal calls without a free B channel, too
522 * (requires a u8 handle for the at_state structure that can
523 * be stored in the PLCI and used in the CONNECT_RESP message
524 * handler to retrieve it)
525 */
526 if (!bcs)
527 return ICALL_IGNORE;
528
529 /* prepare CONNECT_IND message, using B channel number as PLCI */
530 capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
531 iif->ctr.cnr | ((bcs->channel + 1) << 8));
532
533 /* minimum size, all structs empty */
534 msgsize = CAPI_CONNECT_IND_BASELEN;
535
536 /* Bearer Capability (mandatory) */
537 if (at_state->str_var[STR_ZBC]) {
538 /* pass on BC from Gigaset */
539 if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
540 MAX_BC_OCTETS) < 0) {
541 dev_warn(cs->dev, "RING ignored - bad BC %s\n",
542 at_state->str_var[STR_ZBC]);
543 return ICALL_IGNORE;
544 }
545
546 /* look up corresponding CIP value */
547 iif->hcmsg.CIPValue = 0; /* default if nothing found */
548 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
549 if (cip2bchlc[i].bc != NULL &&
550 cip2bchlc[i].hlc == NULL &&
551 !strcmp(cip2bchlc[i].bc,
552 at_state->str_var[STR_ZBC])) {
553 iif->hcmsg.CIPValue = i;
554 break;
555 }
556 } else {
557 /* no BC (internal call): assume CIP 1 (speech, A-law) */
558 iif->hcmsg.CIPValue = 1;
559 encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
560 }
561 iif->hcmsg.BC = iif->bc_buf;
562 msgsize += iif->hcmsg.BC[0];
563
564 /* High Layer Compatibility (optional) */
565 if (at_state->str_var[STR_ZHLC]) {
566 /* pass on HLC from Gigaset */
567 if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
568 MAX_HLC_OCTETS) < 0) {
569 dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
570 at_state->str_var[STR_ZHLC]);
571 return ICALL_IGNORE;
572 }
573 iif->hcmsg.HLC = iif->hlc_buf;
574 msgsize += iif->hcmsg.HLC[0];
575
576 /* look up corresponding CIP value */
577 /* keep BC based CIP value if none found */
578 if (at_state->str_var[STR_ZBC])
579 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
580 if (cip2bchlc[i].hlc != NULL &&
581 !strcmp(cip2bchlc[i].hlc,
582 at_state->str_var[STR_ZHLC]) &&
583 !strcmp(cip2bchlc[i].bc,
584 at_state->str_var[STR_ZBC])) {
585 iif->hcmsg.CIPValue = i;
586 break;
587 }
588 }
589
590 /* Called Party Number (optional) */
591 if (at_state->str_var[STR_ZCPN]) {
592 i = strlen(at_state->str_var[STR_ZCPN]);
593 if (i > MAX_NUMBER_DIGITS) {
594 dev_warn(cs->dev, "RING ignored - bad number %s\n",
595 at_state->str_var[STR_ZBC]);
596 return ICALL_IGNORE;
597 }
598 iif->cdpty_buf[0] = i + 1;
599 iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
600 memcpy(iif->cdpty_buf+2, at_state->str_var[STR_ZCPN], i);
601 iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
602 msgsize += iif->hcmsg.CalledPartyNumber[0];
603 }
604
605 /* Calling Party Number (optional) */
606 if (at_state->str_var[STR_NMBR]) {
607 i = strlen(at_state->str_var[STR_NMBR]);
608 if (i > MAX_NUMBER_DIGITS) {
609 dev_warn(cs->dev, "RING ignored - bad number %s\n",
610 at_state->str_var[STR_ZBC]);
611 return ICALL_IGNORE;
612 }
613 iif->cgpty_buf[0] = i + 2;
614 iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
615 iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
616 memcpy(iif->cgpty_buf+3, at_state->str_var[STR_NMBR], i);
617 iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
618 msgsize += iif->hcmsg.CallingPartyNumber[0];
619 }
620
621 /* remaining parameters (not supported, always left NULL):
622 * - CalledPartySubaddress
623 * - CallingPartySubaddress
624 * - AdditionalInfo
625 * - BChannelinformation
626 * - Keypadfacility
627 * - Useruserdata
628 * - Facilitydataarray
629 */
630
631 gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
632 iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
633 format_ie(iif->hcmsg.BC));
634 gig_dbg(DEBUG_CMD, "icall: HLC %s",
635 format_ie(iif->hcmsg.HLC));
636 gig_dbg(DEBUG_CMD, "icall: CgPty %s",
637 format_ie(iif->hcmsg.CallingPartyNumber));
638 gig_dbg(DEBUG_CMD, "icall: CdPty %s",
639 format_ie(iif->hcmsg.CalledPartyNumber));
640
641 /* scan application list for matching listeners */
642 bcs->ap = NULL;
643 actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
644 list_for_each_entry(ap, &iif->appls, ctrlist)
645 if (actCIPmask & ap->listenCIPmask) {
646 /* build CONNECT_IND message for this application */
647 iif->hcmsg.ApplId = ap->id;
648 iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
649
650 skb = alloc_skb(msgsize, GFP_ATOMIC);
651 if (!skb) {
652 dev_err(cs->dev, "%s: out of memory\n",
653 __func__);
654 break;
655 }
656 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
657 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
658
659 /* add to listeners on this B channel, update state */
660 ap->bcnext = bcs->ap;
661 bcs->ap = ap;
662 bcs->chstate |= CHS_NOTIFY_LL;
663 ap->connected = APCONN_SETUP;
664
665 /* emit message */
666 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
667 }
668
669 /*
670 * Return "accept" if any listeners.
671 * Gigaset will send ALERTING.
672 * There doesn't seem to be a way to avoid this.
673 */
674 return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
675}
676
677/*
678 * send a DISCONNECT_IND message to an application
679 * does not sleep, clobbers the controller's hcmsg structure
680 */
681static void send_disconnect_ind(struct bc_state *bcs,
682 struct gigaset_capi_appl *ap, u16 reason)
683{
684 struct cardstate *cs = bcs->cs;
685 struct gigaset_capi_ctr *iif = cs->iif;
686 struct sk_buff *skb;
687
688 if (ap->connected == APCONN_NONE)
689 return;
690
691 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
692 ap->nextMessageNumber++,
693 iif->ctr.cnr | ((bcs->channel + 1) << 8));
694 iif->hcmsg.Reason = reason;
695 skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
696 if (!skb) {
697 dev_err(cs->dev, "%s: out of memory\n", __func__);
698 return;
699 }
700 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
701 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
702 ap->connected = APCONN_NONE;
703 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
704}
705
706/*
707 * send a DISCONNECT_B3_IND message to an application
708 * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
709 * does not sleep, clobbers the controller's hcmsg structure
710 */
711static void send_disconnect_b3_ind(struct bc_state *bcs,
712 struct gigaset_capi_appl *ap)
713{
714 struct cardstate *cs = bcs->cs;
715 struct gigaset_capi_ctr *iif = cs->iif;
716 struct sk_buff *skb;
717
718 /* nothing to do if no logical connection active */
719 if (ap->connected < APCONN_ACTIVE)
720 return;
721 ap->connected = APCONN_SETUP;
722
723 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
724 ap->nextMessageNumber++,
725 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
726 skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
727 if (!skb) {
728 dev_err(cs->dev, "%s: out of memory\n", __func__);
729 return;
730 }
731 capi_cmsg2message(&iif->hcmsg,
732 __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
733 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
734 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
735}
736
737/**
738 * gigaset_isdn_connD() - signal D channel connect
739 * @bcs: B channel descriptor structure.
740 *
741 * Called by main module at tasklet level to notify the LL that the D channel
742 * connection has been established.
743 */
744void gigaset_isdn_connD(struct bc_state *bcs)
745{
746 struct cardstate *cs = bcs->cs;
747 struct gigaset_capi_ctr *iif = cs->iif;
748 struct gigaset_capi_appl *ap = bcs->ap;
749 struct sk_buff *skb;
750 unsigned int msgsize;
751
752 if (!ap) {
753 dev_err(cs->dev, "%s: no application\n", __func__);
754 return;
755 }
756 while (ap->bcnext) {
757 /* this should never happen */
758 dev_warn(cs->dev, "%s: dropping extra application %u\n",
759 __func__, ap->bcnext->id);
760 send_disconnect_ind(bcs, ap->bcnext,
761 CapiCallGivenToOtherApplication);
762 ap->bcnext = ap->bcnext->bcnext;
763 }
764 if (ap->connected == APCONN_NONE) {
765 dev_warn(cs->dev, "%s: application %u not connected\n",
766 __func__, ap->id);
767 return;
768 }
769
770 /* prepare CONNECT_ACTIVE_IND message
771 * Note: LLC not supported by device
772 */
773 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
774 ap->nextMessageNumber++,
775 iif->ctr.cnr | ((bcs->channel + 1) << 8));
776
777 /* minimum size, all structs empty */
778 msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
779
780 /* ToDo: set parameter: Connected number
781 * (requires ev-layer state machine extension to collect
782 * ZCON device reply)
783 */
784
785 /* build and emit CONNECT_ACTIVE_IND message */
786 skb = alloc_skb(msgsize, GFP_ATOMIC);
787 if (!skb) {
788 dev_err(cs->dev, "%s: out of memory\n", __func__);
789 return;
790 }
791 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
792 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
793 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
794}
795
796/**
797 * gigaset_isdn_hupD() - signal D channel hangup
798 * @bcs: B channel descriptor structure.
799 *
800 * Called by main module at tasklet level to notify the LL that the D channel
801 * connection has been shut down.
802 */
803void gigaset_isdn_hupD(struct bc_state *bcs)
804{
805 struct gigaset_capi_appl *ap;
806
807 /*
808 * ToDo: pass on reason code reported by device
809 * (requires ev-layer state machine extension to collect
810 * ZCAU device reply)
811 */
812 for (ap = bcs->ap; ap != NULL; ap = ap->bcnext) {
813 send_disconnect_b3_ind(bcs, ap);
814 send_disconnect_ind(bcs, ap, 0);
815 }
816 bcs->ap = NULL;
817}
818
819/**
820 * gigaset_isdn_connB() - signal B channel connect
821 * @bcs: B channel descriptor structure.
822 *
823 * Called by main module at tasklet level to notify the LL that the B channel
824 * connection has been established.
825 */
826void gigaset_isdn_connB(struct bc_state *bcs)
827{
828 struct cardstate *cs = bcs->cs;
829 struct gigaset_capi_ctr *iif = cs->iif;
830 struct gigaset_capi_appl *ap = bcs->ap;
831 struct sk_buff *skb;
832 unsigned int msgsize;
833 u8 command;
834
835 if (!ap) {
836 dev_err(cs->dev, "%s: no application\n", __func__);
837 return;
838 }
839 while (ap->bcnext) {
840 /* this should never happen */
841 dev_warn(cs->dev, "%s: dropping extra application %u\n",
842 __func__, ap->bcnext->id);
843 send_disconnect_ind(bcs, ap->bcnext,
844 CapiCallGivenToOtherApplication);
845 ap->bcnext = ap->bcnext->bcnext;
846 }
847 if (!ap->connected) {
848 dev_warn(cs->dev, "%s: application %u not connected\n",
849 __func__, ap->id);
850 return;
851 }
852
853 /*
854 * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
855 * otherwise we have to emit CONNECT_B3_IND first, and follow up with
856 * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
857 * Parameters in both cases always: NCCI = 1, NCPI empty
858 */
859 if (ap->connected >= APCONN_ACTIVE) {
860 command = CAPI_CONNECT_B3_ACTIVE;
861 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
862 } else {
863 command = CAPI_CONNECT_B3;
864 msgsize = CAPI_CONNECT_B3_IND_BASELEN;
865 }
866 capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
867 ap->nextMessageNumber++,
868 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
869 skb = alloc_skb(msgsize, GFP_ATOMIC);
870 if (!skb) {
871 dev_err(cs->dev, "%s: out of memory\n", __func__);
872 return;
873 }
874 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
875 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
876 ap->connected = APCONN_ACTIVE;
877 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
878}
879
880/**
881 * gigaset_isdn_hupB() - signal B channel hangup
882 * @bcs: B channel descriptor structure.
883 *
884 * Called by main module to notify the LL that the B channel connection has
885 * been shut down.
886 */
887void gigaset_isdn_hupB(struct bc_state *bcs)
888{
889 struct cardstate *cs = bcs->cs;
890 struct gigaset_capi_appl *ap = bcs->ap;
891
892 /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
893
894 if (!ap) {
895 dev_err(cs->dev, "%s: no application\n", __func__);
896 return;
897 }
898
899 send_disconnect_b3_ind(bcs, ap);
900}
901
902/**
903 * gigaset_isdn_start() - signal device availability
904 * @cs: device descriptor structure.
905 *
906 * Called by main module to notify the LL that the device is available for
907 * use.
908 */
909void gigaset_isdn_start(struct cardstate *cs)
910{
911 struct gigaset_capi_ctr *iif = cs->iif;
912
913 /* fill profile data: manufacturer name */
914 strcpy(iif->ctr.manu, "Siemens");
915 /* CAPI and device version */
916 iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
917 iif->ctr.version.minorversion = 0;
918 /* ToDo: check/assert cs->gotfwver? */
919 iif->ctr.version.majormanuversion = cs->fwver[0];
920 iif->ctr.version.minormanuversion = cs->fwver[1];
921 /* number of B channels supported */
922 iif->ctr.profile.nbchannel = cs->channels;
923 /* global options: internal controller, supplementary services */
924 iif->ctr.profile.goptions = 0x11;
925 /* B1 protocols: 64 kbit/s HDLC or transparent */
926 iif->ctr.profile.support1 = 0x03;
927 /* B2 protocols: transparent only */
928 /* ToDo: X.75 SLP ? */
929 iif->ctr.profile.support2 = 0x02;
930 /* B3 protocols: transparent only */
931 iif->ctr.profile.support3 = 0x01;
932 /* no serial number */
933 strcpy(iif->ctr.serial, "0");
934 capi_ctr_ready(&iif->ctr);
935}
936
937/**
938 * gigaset_isdn_stop() - signal device unavailability
939 * @cs: device descriptor structure.
940 *
941 * Called by main module to notify the LL that the device is no longer
942 * available for use.
943 */
944void gigaset_isdn_stop(struct cardstate *cs)
945{
946 struct gigaset_capi_ctr *iif = cs->iif;
947 capi_ctr_down(&iif->ctr);
948}
949
950/*
951 * kernel CAPI callback methods
952 * ============================
953 */
954
955/*
956 * load firmware
957 */
958static int gigaset_load_firmware(struct capi_ctr *ctr, capiloaddata *data)
959{
960 struct cardstate *cs = ctr->driverdata;
961
962 /* AVM specific operation, not needed for Gigaset -- ignore */
963 dev_notice(cs->dev, "load_firmware ignored\n");
964
965 return 0;
966}
967
968/*
969 * reset (deactivate) controller
970 */
971static void gigaset_reset_ctr(struct capi_ctr *ctr)
972{
973 struct cardstate *cs = ctr->driverdata;
974
975 /* AVM specific operation, not needed for Gigaset -- ignore */
976 dev_notice(cs->dev, "reset_ctr ignored\n");
977}
978
979/*
980 * register CAPI application
981 */
982static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
983 capi_register_params *rp)
984{
985 struct gigaset_capi_ctr *iif
986 = container_of(ctr, struct gigaset_capi_ctr, ctr);
987 struct cardstate *cs = ctr->driverdata;
988 struct gigaset_capi_appl *ap;
989
990 list_for_each_entry(ap, &iif->appls, ctrlist)
991 if (ap->id == appl) {
992 dev_notice(cs->dev,
993 "application %u already registered\n", appl);
994 return;
995 }
996
997 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
998 if (!ap) {
999 dev_err(cs->dev, "%s: out of memory\n", __func__);
1000 return;
1001 }
1002 ap->id = appl;
1003
1004 list_add(&ap->ctrlist, &iif->appls);
1005}
1006
1007/*
1008 * release CAPI application
1009 */
1010static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
1011{
1012 struct gigaset_capi_ctr *iif
1013 = container_of(ctr, struct gigaset_capi_ctr, ctr);
1014 struct cardstate *cs = iif->ctr.driverdata;
1015 struct gigaset_capi_appl *ap, *tmp;
1016
1017 list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
1018 if (ap->id == appl) {
1019 if (ap->connected != APCONN_NONE) {
1020 dev_err(cs->dev,
1021 "%s: application %u still connected\n",
1022 __func__, ap->id);
1023 /* ToDo: clear active connection */
1024 }
1025 list_del(&ap->ctrlist);
1026 kfree(ap);
1027 }
1028
1029}
1030
1031/*
1032 * =====================================================================
1033 * outgoing CAPI message handler
1034 * =====================================================================
1035 */
1036
1037/*
1038 * helper function: emit reply message with given Info value
1039 */
1040static void send_conf(struct gigaset_capi_ctr *iif,
1041 struct gigaset_capi_appl *ap,
1042 struct sk_buff *skb,
1043 u16 info)
1044{
1045 /*
1046 * _CONF replies always only have NCCI and Info parameters
1047 * so they'll fit into the _REQ message skb
1048 */
1049 capi_cmsg_answer(&iif->acmsg);
1050 iif->acmsg.Info = info;
1051 capi_cmsg2message(&iif->acmsg, skb->data);
1052 __skb_trim(skb, CAPI_STDCONF_LEN);
1053 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1054 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1055}
1056
1057/*
1058 * process FACILITY_REQ message
1059 */
1060static void do_facility_req(struct gigaset_capi_ctr *iif,
1061 struct gigaset_capi_appl *ap,
1062 struct sk_buff *skb)
1063{
1064 struct cardstate *cs = iif->ctr.driverdata;
1065 struct sk_buff *cskb;
1066 u8 *pparam;
1067 unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
1068 u16 function, info;
1069 static u8 confparam[10]; /* max. 9 octets + length byte */
1070
1071 /* decode message */
1072 capi_message2cmsg(&iif->acmsg, skb->data);
1073 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1074
1075 /*
1076 * Facility Request Parameter is not decoded by capi_message2cmsg()
1077 * encoding depends on Facility Selector
1078 */
1079 switch (iif->acmsg.FacilitySelector) {
1080 case CAPI_FACILITY_DTMF: /* ToDo */
1081 info = CapiFacilityNotSupported;
1082 confparam[0] = 2; /* length */
1083 /* DTMF information: Unknown DTMF request */
1084 capimsg_setu16(confparam, 1, 2);
1085 break;
1086
1087 case CAPI_FACILITY_V42BIS: /* not supported */
1088 info = CapiFacilityNotSupported;
1089 confparam[0] = 2; /* length */
1090 /* V.42 bis information: not available */
1091 capimsg_setu16(confparam, 1, 1);
1092 break;
1093
1094 case CAPI_FACILITY_SUPPSVC:
1095 /* decode Function parameter */
1096 pparam = iif->acmsg.FacilityRequestParameter;
1097 if (pparam == NULL || *pparam < 2) {
1098 dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
1099 "Facility Request Parameter");
1100 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1101 return;
1102 }
1103 function = CAPIMSG_U16(pparam, 1);
1104 switch (function) {
1105 case CAPI_SUPPSVC_GETSUPPORTED:
1106 info = CapiSuccess;
1107 /* Supplementary Service specific parameter */
1108 confparam[3] = 6; /* length */
1109 /* Supplementary services info: Success */
1110 capimsg_setu16(confparam, 4, CapiSuccess);
1111 /* Supported Services: none */
1112 capimsg_setu32(confparam, 6, 0);
1113 break;
1114 /* ToDo: add supported services */
1115 default:
1116 info = CapiFacilitySpecificFunctionNotSupported;
1117 /* Supplementary Service specific parameter */
1118 confparam[3] = 2; /* length */
1119 /* Supplementary services info: not supported */
1120 capimsg_setu16(confparam, 4,
1121 CapiSupplementaryServiceNotSupported);
1122 }
1123
1124 /* Facility confirmation parameter */
1125 confparam[0] = confparam[3] + 3; /* total length */
1126 /* Function: copy from _REQ message */
1127 capimsg_setu16(confparam, 1, function);
1128 /* Supplementary Service specific parameter already set above */
1129 break;
1130
1131 case CAPI_FACILITY_WAKEUP: /* ToDo */
1132 info = CapiFacilityNotSupported;
1133 confparam[0] = 2; /* length */
1134 /* Number of accepted awake request parameters: 0 */
1135 capimsg_setu16(confparam, 1, 0);
1136 break;
1137
1138 default:
1139 info = CapiFacilityNotSupported;
1140 confparam[0] = 0; /* empty struct */
1141 }
1142
1143 /* send FACILITY_CONF with given Info and confirmation parameter */
1144 capi_cmsg_answer(&iif->acmsg);
1145 iif->acmsg.Info = info;
1146 iif->acmsg.FacilityConfirmationParameter = confparam;
1147 msgsize += confparam[0]; /* length */
1148 cskb = alloc_skb(msgsize, GFP_ATOMIC);
1149 if (!cskb) {
1150 dev_err(cs->dev, "%s: out of memory\n", __func__);
1151 return;
1152 }
1153 capi_cmsg2message(&iif->acmsg, __skb_put(cskb, msgsize));
1154 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1155 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
1156}
1157
1158
1159/*
1160 * process LISTEN_REQ message
1161 * just store the masks in the application data structure
1162 */
1163static void do_listen_req(struct gigaset_capi_ctr *iif,
1164 struct gigaset_capi_appl *ap,
1165 struct sk_buff *skb)
1166{
1167 /* decode message */
1168 capi_message2cmsg(&iif->acmsg, skb->data);
1169 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1170
1171 /* store listening parameters */
1172 ap->listenInfoMask = iif->acmsg.InfoMask;
1173 ap->listenCIPmask = iif->acmsg.CIPmask;
1174 send_conf(iif, ap, skb, CapiSuccess);
1175}
1176
1177/*
1178 * process ALERT_REQ message
1179 * nothing to do, Gigaset always alerts anyway
1180 */
1181static void do_alert_req(struct gigaset_capi_ctr *iif,
1182 struct gigaset_capi_appl *ap,
1183 struct sk_buff *skb)
1184{
1185 /* decode message */
1186 capi_message2cmsg(&iif->acmsg, skb->data);
1187 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1188 send_conf(iif, ap, skb, CapiAlertAlreadySent);
1189}
1190
1191/*
1192 * process CONNECT_REQ message
1193 * allocate a B channel, prepare dial commands, queue a DIAL event,
1194 * emit CONNECT_CONF reply
1195 */
1196static void do_connect_req(struct gigaset_capi_ctr *iif,
1197 struct gigaset_capi_appl *ap,
1198 struct sk_buff *skb)
1199{
1200 struct cardstate *cs = iif->ctr.driverdata;
1201 _cmsg *cmsg = &iif->acmsg;
1202 struct bc_state *bcs;
1203 char **commands;
1204 char *s;
1205 u8 *pp;
1206 int i, l;
1207 u16 info;
1208
1209 /* decode message */
1210 capi_message2cmsg(&iif->acmsg, skb->data);
1211 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1212
1213 /* get free B channel & construct PLCI */
1214 bcs = gigaset_get_free_channel(cs);
1215 if (!bcs) {
1216 dev_notice(cs->dev, "%s: no B channel available\n",
1217 "CONNECT_REQ");
1218 send_conf(iif, ap, skb, CapiNoPlciAvailable);
1219 return;
1220 }
1221 ap->bcnext = NULL;
1222 bcs->ap = ap;
1223 cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
1224
1225 /* build command table */
1226 commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
1227 if (!commands)
1228 goto oom;
1229
1230 /* encode parameter: Called party number */
1231 pp = cmsg->CalledPartyNumber;
1232 if (pp == NULL || *pp == 0) {
1233 dev_notice(cs->dev, "%s: %s missing\n",
1234 "CONNECT_REQ", "Called party number");
1235 info = CapiIllMessageParmCoding;
1236 goto error;
1237 }
1238 l = *pp++;
1239 /* check type of number/numbering plan byte */
1240 switch (*pp) {
1241 case 0x80: /* unknown type / unknown numbering plan */
1242 case 0x81: /* unknown type / ISDN/Telephony numbering plan */
1243 break;
1244 default: /* others: warn about potential misinterpretation */
1245 dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
1246 "CONNECT_REQ", "Called party number", *pp);
1247 }
1248 pp++;
1249 l--;
1250 /* translate "**" internal call prefix to CTP value */
1251 if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
1252 s = "^SCTP=0\r";
1253 pp += 2;
1254 l -= 2;
1255 } else {
1256 s = "^SCTP=1\r";
1257 }
1258 commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
1259 if (!commands[AT_TYPE])
1260 goto oom;
1261 commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
1262 if (!commands[AT_DIAL])
1263 goto oom;
1264 snprintf(commands[AT_DIAL], l+3, "D%*s\r", l, pp);
1265
1266 /* encode parameter: Calling party number */
1267 pp = cmsg->CallingPartyNumber;
1268 if (pp != NULL && *pp > 0) {
1269 l = *pp++;
1270
1271 /* check type of number/numbering plan byte */
1272 /* ToDo: allow for/handle Ext=1? */
1273 switch (*pp) {
1274 case 0x00: /* unknown type / unknown numbering plan */
1275 case 0x01: /* unknown type / ISDN/Telephony num. plan */
1276 break;
1277 default:
1278 dev_notice(cs->dev,
1279 "%s: %s type/plan 0x%02x unsupported\n",
1280 "CONNECT_REQ", "Calling party number", *pp);
1281 }
1282 pp++;
1283 l--;
1284
1285 /* check presentation indicator */
1286 if (!l) {
1287 dev_notice(cs->dev, "%s: %s IE truncated\n",
1288 "CONNECT_REQ", "Calling party number");
1289 info = CapiIllMessageParmCoding;
1290 goto error;
1291 }
1292 switch (*pp & 0xfc) { /* ignore Screening indicator */
1293 case 0x80: /* Presentation allowed */
1294 s = "^SCLIP=1\r";
1295 break;
1296 case 0xa0: /* Presentation restricted */
1297 s = "^SCLIP=0\r";
1298 break;
1299 default:
1300 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1301 "CONNECT_REQ",
1302 "Presentation/Screening indicator",
1303 *pp);
1304 s = "^SCLIP=1\r";
1305 }
1306 commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
1307 if (!commands[AT_CLIP])
1308 goto oom;
1309 pp++;
1310 l--;
1311
1312 if (l) {
1313 /* number */
1314 commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
1315 if (!commands[AT_MSN])
1316 goto oom;
1317 snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
1318 }
1319 }
1320
1321 /* check parameter: CIP Value */
1322 if (cmsg->CIPValue > ARRAY_SIZE(cip2bchlc) ||
1323 (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
1324 dev_notice(cs->dev, "%s: unknown CIP value %d\n",
1325 "CONNECT_REQ", cmsg->CIPValue);
1326 info = CapiCipValueUnknown;
1327 goto error;
1328 }
1329
1330 /* check/encode parameter: BC */
1331 if (cmsg->BC && cmsg->BC[0]) {
1332 /* explicit BC overrides CIP */
1333 l = 2*cmsg->BC[0] + 7;
1334 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1335 if (!commands[AT_BC])
1336 goto oom;
1337 strcpy(commands[AT_BC], "^SBC=");
1338 decode_ie(cmsg->BC, commands[AT_BC]+5);
1339 strcpy(commands[AT_BC] + l - 2, "\r");
1340 } else if (cip2bchlc[cmsg->CIPValue].bc) {
1341 l = strlen(cip2bchlc[cmsg->CIPValue].bc) + 7;
1342 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1343 if (!commands[AT_BC])
1344 goto oom;
1345 snprintf(commands[AT_BC], l, "^SBC=%s\r",
1346 cip2bchlc[cmsg->CIPValue].bc);
1347 }
1348
1349 /* check/encode parameter: HLC */
1350 if (cmsg->HLC && cmsg->HLC[0]) {
1351 /* explicit HLC overrides CIP */
1352 l = 2*cmsg->HLC[0] + 7;
1353 commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
1354 if (!commands[AT_HLC])
1355 goto oom;
1356 strcpy(commands[AT_HLC], "^SHLC=");
1357 decode_ie(cmsg->HLC, commands[AT_HLC]+5);
1358 strcpy(commands[AT_HLC] + l - 2, "\r");
1359 } else if (cip2bchlc[cmsg->CIPValue].hlc) {
1360 l = strlen(cip2bchlc[cmsg->CIPValue].hlc) + 7;
1361 commands[AT_HLC] = kmalloc(l, GFP_KERNEL);
1362 if (!commands[AT_HLC])
1363 goto oom;
1364 snprintf(commands[AT_HLC], l, "^SHLC=%s\r",
1365 cip2bchlc[cmsg->CIPValue].hlc);
1366 }
1367
1368 /* check/encode parameter: B Protocol */
1369 if (cmsg->BProtocol == CAPI_DEFAULT) {
1370 bcs->proto2 = L2_HDLC;
1371 dev_warn(cs->dev,
1372 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1373 } else {
1374 switch (cmsg->B1protocol) {
1375 case 0:
1376 bcs->proto2 = L2_HDLC;
1377 break;
1378 case 1:
1379 bcs->proto2 = L2_BITSYNC;
1380 break;
1381 default:
1382 dev_warn(cs->dev,
1383 "B1 Protocol %u unsupported, using Transparent\n",
1384 cmsg->B1protocol);
1385 bcs->proto2 = L2_BITSYNC;
1386 }
1387 if (cmsg->B2protocol != 1)
1388 dev_warn(cs->dev,
1389 "B2 Protocol %u unsupported, using Transparent\n",
1390 cmsg->B2protocol);
1391 if (cmsg->B3protocol != 0)
1392 dev_warn(cs->dev,
1393 "B3 Protocol %u unsupported, using Transparent\n",
1394 cmsg->B3protocol);
1395 ignore_cstruct_param(cs, cmsg->B1configuration,
1396 "CONNECT_REQ", "B1 Configuration");
1397 ignore_cstruct_param(cs, cmsg->B2configuration,
1398 "CONNECT_REQ", "B2 Configuration");
1399 ignore_cstruct_param(cs, cmsg->B3configuration,
1400 "CONNECT_REQ", "B3 Configuration");
1401 }
1402 commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
1403 if (!commands[AT_PROTO])
1404 goto oom;
1405 snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
1406
1407 /* ToDo: check/encode remaining parameters */
1408 ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
1409 "CONNECT_REQ", "Called pty subaddr");
1410 ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
1411 "CONNECT_REQ", "Calling pty subaddr");
1412 ignore_cstruct_param(cs, cmsg->LLC,
1413 "CONNECT_REQ", "LLC");
1414 ignore_cmstruct_param(cs, cmsg->AdditionalInfo,
1415 "CONNECT_REQ", "Additional Info");
1416
1417 /* encode parameter: B channel to use */
1418 commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
1419 if (!commands[AT_ISO])
1420 goto oom;
1421 snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
1422 (unsigned) bcs->channel + 1);
1423
1424 /* queue & schedule EV_DIAL event */
1425 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
1426 bcs->at_state.seq_index, NULL))
1427 goto oom;
1428 gig_dbg(DEBUG_CMD, "scheduling DIAL");
1429 gigaset_schedule_event(cs);
1430 ap->connected = APCONN_SETUP;
1431 send_conf(iif, ap, skb, CapiSuccess);
1432 return;
1433
1434oom:
1435 dev_err(cs->dev, "%s: out of memory\n", __func__);
1436 info = CAPI_MSGOSRESOURCEERR;
1437error:
1438 if (commands)
1439 for (i = 0; i < AT_NUM; i++)
1440 kfree(commands[i]);
1441 kfree(commands);
1442 gigaset_free_channel(bcs);
1443 send_conf(iif, ap, skb, info);
1444}
1445
1446/*
1447 * process CONNECT_RESP message
1448 * checks protocol parameters and queues an ACCEPT or HUP event
1449 */
1450static void do_connect_resp(struct gigaset_capi_ctr *iif,
1451 struct gigaset_capi_appl *ap,
1452 struct sk_buff *skb)
1453{
1454 struct cardstate *cs = iif->ctr.driverdata;
1455 _cmsg *cmsg = &iif->acmsg;
1456 struct bc_state *bcs;
1457 struct gigaset_capi_appl *oap;
1458 int channel;
1459
1460 /* decode message */
1461 capi_message2cmsg(&iif->acmsg, skb->data);
1462 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1463 dev_kfree_skb(skb);
1464
1465 /* extract and check channel number from PLCI */
1466 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1467 if (!channel || channel > cs->channels) {
1468 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1469 "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
1470 return;
1471 }
1472 bcs = cs->bcs + channel - 1;
1473
1474 switch (cmsg->Reject) {
1475 case 0: /* Accept */
1476 /* drop all competing applications, keep only this one */
1477 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1478 if (oap != ap)
1479 send_disconnect_ind(bcs, oap,
1480 CapiCallGivenToOtherApplication);
1481 ap->bcnext = NULL;
1482 bcs->ap = ap;
1483 bcs->chstate |= CHS_NOTIFY_LL;
1484
1485 /* check/encode B channel protocol */
1486 if (cmsg->BProtocol == CAPI_DEFAULT) {
1487 bcs->proto2 = L2_HDLC;
1488 dev_warn(cs->dev,
1489 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1490 } else {
1491 switch (cmsg->B1protocol) {
1492 case 0:
1493 bcs->proto2 = L2_HDLC;
1494 break;
1495 case 1:
1496 bcs->proto2 = L2_BITSYNC;
1497 break;
1498 default:
1499 dev_warn(cs->dev,
1500 "B1 Protocol %u unsupported, using Transparent\n",
1501 cmsg->B1protocol);
1502 bcs->proto2 = L2_BITSYNC;
1503 }
1504 if (cmsg->B2protocol != 1)
1505 dev_warn(cs->dev,
1506 "B2 Protocol %u unsupported, using Transparent\n",
1507 cmsg->B2protocol);
1508 if (cmsg->B3protocol != 0)
1509 dev_warn(cs->dev,
1510 "B3 Protocol %u unsupported, using Transparent\n",
1511 cmsg->B3protocol);
1512 ignore_cstruct_param(cs, cmsg->B1configuration,
1513 "CONNECT_RESP", "B1 Configuration");
1514 ignore_cstruct_param(cs, cmsg->B2configuration,
1515 "CONNECT_RESP", "B2 Configuration");
1516 ignore_cstruct_param(cs, cmsg->B3configuration,
1517 "CONNECT_RESP", "B3 Configuration");
1518 }
1519
1520 /* ToDo: check/encode remaining parameters */
1521 ignore_cstruct_param(cs, cmsg->ConnectedNumber,
1522 "CONNECT_RESP", "Connected Number");
1523 ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
1524 "CONNECT_RESP", "Connected Subaddress");
1525 ignore_cstruct_param(cs, cmsg->LLC,
1526 "CONNECT_RESP", "LLC");
1527 ignore_cmstruct_param(cs, cmsg->AdditionalInfo,
1528 "CONNECT_RESP", "Additional Info");
1529
1530 /* Accept call */
1531 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1532 EV_ACCEPT, NULL, 0, NULL))
1533 return;
1534 gig_dbg(DEBUG_CMD, "scheduling ACCEPT");
1535 gigaset_schedule_event(cs);
1536 return;
1537
1538 case 1: /* Ignore */
1539 /* send DISCONNECT_IND to this application */
1540 send_disconnect_ind(bcs, ap, 0);
1541
1542 /* remove it from the list of listening apps */
1543 if (bcs->ap == ap) {
1544 bcs->ap = ap->bcnext;
1545 if (bcs->ap == NULL)
1546 /* last one: stop ev-layer hupD notifications */
1547 bcs->chstate &= ~CHS_NOTIFY_LL;
1548 return;
1549 }
1550 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
1551 if (oap->bcnext == ap) {
1552 oap->bcnext = oap->bcnext->bcnext;
1553 return;
1554 }
1555 }
1556 dev_err(cs->dev, "%s: application %u not found\n",
1557 __func__, ap->id);
1558 return;
1559
1560 default: /* Reject */
1561 /* drop all competing applications, keep only this one */
1562 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext)
1563 if (oap != ap)
1564 send_disconnect_ind(bcs, oap,
1565 CapiCallGivenToOtherApplication);
1566 ap->bcnext = NULL;
1567 bcs->ap = ap;
1568
1569 /* reject call - will trigger DISCONNECT_IND for this app */
1570 dev_info(cs->dev, "%s: Reject=%x\n",
1571 "CONNECT_RESP", cmsg->Reject);
1572 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1573 EV_HUP, NULL, 0, NULL))
1574 return;
1575 gig_dbg(DEBUG_CMD, "scheduling HUP");
1576 gigaset_schedule_event(cs);
1577 return;
1578 }
1579}
1580
1581/*
1582 * process CONNECT_B3_REQ message
1583 * build NCCI and emit CONNECT_B3_CONF reply
1584 */
1585static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
1586 struct gigaset_capi_appl *ap,
1587 struct sk_buff *skb)
1588{
1589 struct cardstate *cs = iif->ctr.driverdata;
1590 int channel;
1591
1592 /* decode message */
1593 capi_message2cmsg(&iif->acmsg, skb->data);
1594 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1595
1596 /* extract and check channel number from PLCI */
1597 channel = (iif->acmsg.adr.adrPLCI >> 8) & 0xff;
1598 if (!channel || channel > cs->channels) {
1599 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1600 "CONNECT_B3_REQ", "PLCI", iif->acmsg.adr.adrPLCI);
1601 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1602 return;
1603 }
1604
1605 /* mark logical connection active */
1606 ap->connected = APCONN_ACTIVE;
1607
1608 /* build NCCI: always 1 (one B3 connection only) */
1609 iif->acmsg.adr.adrNCCI |= 1 << 16;
1610
1611 /* NCPI parameter: not applicable for B3 Transparent */
1612 ignore_cstruct_param(cs, iif->acmsg.NCPI,
1613 "CONNECT_B3_REQ", "NCPI");
1614 send_conf(iif, ap, skb,
1615 (iif->acmsg.NCPI && iif->acmsg.NCPI[0]) ?
1616 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1617}
1618
1619/*
1620 * process CONNECT_B3_RESP message
1621 * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
1622 * or queue EV_HUP and emit DISCONNECT_B3_IND.
1623 * The emitted message is always shorter than the received one,
1624 * allowing to reuse the skb.
1625 */
1626static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
1627 struct gigaset_capi_appl *ap,
1628 struct sk_buff *skb)
1629{
1630 struct cardstate *cs = iif->ctr.driverdata;
1631 struct bc_state *bcs = NULL;
1632 int channel;
1633 unsigned int msgsize;
1634 u8 command;
1635
1636 /* decode message */
1637 capi_message2cmsg(&iif->acmsg, skb->data);
1638 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1639
1640 /* extract and check channel number and NCCI */
1641 channel = (iif->acmsg.adr.adrNCCI >> 8) & 0xff;
1642 if (!channel || channel > cs->channels ||
1643 ((iif->acmsg.adr.adrNCCI >> 16) & 0xffff) != 1) {
1644 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1645 "CONNECT_B3_RESP", "NCCI", iif->acmsg.adr.adrNCCI);
1646 dev_kfree_skb(skb);
1647 return;
1648 }
1649 bcs = &cs->bcs[channel-1];
1650
1651 if (iif->acmsg.Reject) {
1652 /* Reject: clear B3 connect received flag */
1653 ap->connected = APCONN_SETUP;
1654
1655 /* trigger hangup, causing eventual DISCONNECT_IND */
1656 if (!gigaset_add_event(cs, &bcs->at_state,
1657 EV_HUP, NULL, 0, NULL)) {
1658 dev_err(cs->dev, "%s: out of memory\n", __func__);
1659 dev_kfree_skb(skb);
1660 return;
1661 }
1662 gig_dbg(DEBUG_CMD, "scheduling HUP");
1663 gigaset_schedule_event(cs);
1664
1665 /* emit DISCONNECT_B3_IND */
1666 command = CAPI_DISCONNECT_B3;
1667 msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
1668 } else {
1669 /*
1670 * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
1671 * we only send CONNECT_B3_IND if the B channel is up
1672 */
1673 command = CAPI_CONNECT_B3_ACTIVE;
1674 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
1675 }
1676 capi_cmsg_header(&iif->acmsg, ap->id, command, CAPI_IND,
1677 ap->nextMessageNumber++, iif->acmsg.adr.adrNCCI);
1678 __skb_trim(skb, msgsize);
1679 capi_cmsg2message(&iif->acmsg, skb->data);
1680 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1681 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1682}
1683
1684/*
1685 * process DISCONNECT_REQ message
1686 * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
1687 * emit DISCONNECT_CONF reply
1688 */
1689static void do_disconnect_req(struct gigaset_capi_ctr *iif,
1690 struct gigaset_capi_appl *ap,
1691 struct sk_buff *skb)
1692{
1693 struct cardstate *cs = iif->ctr.driverdata;
1694 struct bc_state *bcs;
1695 _cmsg *b3cmsg;
1696 struct sk_buff *b3skb;
1697 int channel;
1698
1699 /* decode message */
1700 capi_message2cmsg(&iif->acmsg, skb->data);
1701 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1702
1703 /* extract and check channel number from PLCI */
1704 channel = (iif->acmsg.adr.adrPLCI >> 8) & 0xff;
1705 if (!channel || channel > cs->channels) {
1706 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1707 "DISCONNECT_REQ", "PLCI", iif->acmsg.adr.adrPLCI);
1708 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1709 return;
1710 }
1711 bcs = cs->bcs + channel - 1;
1712
1713 /* ToDo: process parameter: Additional info */
1714 ignore_cmstruct_param(cs, iif->acmsg.AdditionalInfo,
1715 "DISCONNECT_REQ", "Additional Info");
1716
1717 /* skip if DISCONNECT_IND already sent */
1718 if (!ap->connected)
1719 return;
1720
1721 /* check for active logical connection */
1722 if (ap->connected >= APCONN_ACTIVE) {
1723 /*
1724 * emit DISCONNECT_B3_IND with cause 0x3301
1725 * use separate cmsg structure, as the content of iif->acmsg
1726 * is still needed for creating the _CONF message
1727 */
1728 b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
1729 if (!b3cmsg) {
1730 dev_err(cs->dev, "%s: out of memory\n", __func__);
1731 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1732 return;
1733 }
1734 capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
1735 ap->nextMessageNumber++,
1736 iif->acmsg.adr.adrPLCI | (1 << 16));
1737 b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
1738 b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
1739 if (b3skb == NULL) {
1740 dev_err(cs->dev, "%s: out of memory\n", __func__);
1741 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1742 return;
1743 }
1744 capi_cmsg2message(b3cmsg,
1745 __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
1746 kfree(b3cmsg);
1747 capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
1748 }
1749
1750 /* trigger hangup, causing eventual DISCONNECT_IND */
1751 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1752 dev_err(cs->dev, "%s: out of memory\n", __func__);
1753 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1754 return;
1755 }
1756 gig_dbg(DEBUG_CMD, "scheduling HUP");
1757 gigaset_schedule_event(cs);
1758
1759 /* emit reply */
1760 send_conf(iif, ap, skb, CapiSuccess);
1761}
1762
1763/*
1764 * process DISCONNECT_B3_REQ message
1765 * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
1766 */
1767static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
1768 struct gigaset_capi_appl *ap,
1769 struct sk_buff *skb)
1770{
1771 struct cardstate *cs = iif->ctr.driverdata;
1772 int channel;
1773
1774 /* decode message */
1775 capi_message2cmsg(&iif->acmsg, skb->data);
1776 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1777
1778 /* extract and check channel number and NCCI */
1779 channel = (iif->acmsg.adr.adrNCCI >> 8) & 0xff;
1780 if (!channel || channel > cs->channels ||
1781 ((iif->acmsg.adr.adrNCCI >> 16) & 0xffff) != 1) {
1782 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1783 "DISCONNECT_B3_REQ", "NCCI", iif->acmsg.adr.adrNCCI);
1784 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1785 return;
1786 }
1787
1788 /* reject if logical connection not active */
1789 if (ap->connected < APCONN_ACTIVE) {
1790 send_conf(iif, ap, skb,
1791 CapiMessageNotSupportedInCurrentState);
1792 return;
1793 }
1794
1795 /* trigger hangup, causing eventual DISCONNECT_B3_IND */
1796 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1797 EV_HUP, NULL, 0, NULL)) {
1798 dev_err(cs->dev, "%s: out of memory\n", __func__);
1799 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1800 return;
1801 }
1802 gig_dbg(DEBUG_CMD, "scheduling HUP");
1803 gigaset_schedule_event(cs);
1804
1805 /* NCPI parameter: not applicable for B3 Transparent */
1806 ignore_cstruct_param(cs, iif->acmsg.NCPI,
1807 "DISCONNECT_B3_REQ", "NCPI");
1808 send_conf(iif, ap, skb,
1809 (iif->acmsg.NCPI && iif->acmsg.NCPI[0]) ?
1810 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1811}
1812
1813/*
1814 * process DATA_B3_REQ message
1815 */
1816static void do_data_b3_req(struct gigaset_capi_ctr *iif,
1817 struct gigaset_capi_appl *ap,
1818 struct sk_buff *skb)
1819{
1820 struct cardstate *cs = iif->ctr.driverdata;
1821 int channel = CAPIMSG_PLCI_PART(skb->data);
1822 u16 ncci = CAPIMSG_NCCI_PART(skb->data);
1823 u16 msglen = CAPIMSG_LEN(skb->data);
1824 u16 datalen = CAPIMSG_DATALEN(skb->data);
1825 u16 flags = CAPIMSG_FLAGS(skb->data);
1826
1827 /* frequent message, avoid _cmsg overhead */
1828 dump_rawmsg(DEBUG_LLDATA, "DATA_B3_REQ", skb->data);
1829
1830 gig_dbg(DEBUG_LLDATA,
1831 "Receiving data from LL (ch: %d, flg: %x, sz: %d|%d)",
1832 channel, flags, msglen, datalen);
1833
1834 /* check parameters */
1835 if (channel == 0 || channel > cs->channels || ncci != 1) {
1836 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1837 "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
1838 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1839 return;
1840 }
1841 if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
1842 dev_notice(cs->dev, "%s: unexpected length %d\n",
1843 "DATA_B3_REQ", msglen);
1844 if (msglen + datalen != skb->len)
1845 dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
1846 "DATA_B3_REQ", msglen, datalen, skb->len);
1847 if (msglen + datalen > skb->len) {
1848 /* message too short for announced data length */
1849 send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
1850 return;
1851 }
1852 if (flags & CAPI_FLAGS_RESERVED) {
1853 dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
1854 "DATA_B3_REQ", flags);
1855 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1856 return;
1857 }
1858
1859 /* reject if logical connection not active */
1860 if (ap->connected < APCONN_ACTIVE) {
1861 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1862 return;
1863 }
1864
1865 /*
1866 * pull CAPI message from skb,
1867 * pass payload data to device-specific module
1868 * CAPI message will be preserved in headroom
1869 */
1870 skb_pull(skb, msglen);
1871 if (cs->ops->send_skb(&cs->bcs[channel-1], skb) < 0) {
1872 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1873 return;
1874 }
1875
1876 /* DATA_B3_CONF reply will be sent by gigaset_skb_sent() */
1877
1878 /*
1879 * ToDo: honor unset "delivery confirmation" bit
1880 * (send DATA_B3_CONF immediately?)
1881 */
1882}
1883
1884/*
1885 * process RESET_B3_REQ message
1886 * just always reply "not supported by current protocol"
1887 */
1888static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
1889 struct gigaset_capi_appl *ap,
1890 struct sk_buff *skb)
1891{
1892 /* decode message */
1893 capi_message2cmsg(&iif->acmsg, skb->data);
1894 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1895 send_conf(iif, ap, skb,
1896 CapiResetProcedureNotSupportedByCurrentProtocol);
1897}
1898
1899/*
1900 * dump unsupported/ignored messages at most twice per minute,
1901 * some apps send those very frequently
1902 */
1903static unsigned long ignored_msg_dump_time;
1904
1905/*
1906 * unsupported CAPI message handler
1907 */
1908static void do_unsupported(struct gigaset_capi_ctr *iif,
1909 struct gigaset_capi_appl *ap,
1910 struct sk_buff *skb)
1911{
1912 /* decode message */
1913 capi_message2cmsg(&iif->acmsg, skb->data);
1914 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
1915 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1916 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
1917}
1918
1919/*
1920 * CAPI message handler: no-op
1921 */
1922static void do_nothing(struct gigaset_capi_ctr *iif,
1923 struct gigaset_capi_appl *ap,
1924 struct sk_buff *skb)
1925{
1926 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
1927 /* decode message */
1928 capi_message2cmsg(&iif->acmsg, skb->data);
1929 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1930 }
1931 dev_kfree_skb(skb);
1932}
1933
1934static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
1935 struct gigaset_capi_appl *ap,
1936 struct sk_buff *skb)
1937{
1938 dump_rawmsg(DEBUG_LLDATA, __func__, skb->data);
1939 dev_kfree_skb(skb);
1940}
1941
1942/* table of outgoing CAPI message handlers with lookup function */
1943typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
1944 struct gigaset_capi_appl *,
1945 struct sk_buff *);
1946
1947static struct {
1948 u16 cmd;
1949 capi_send_handler_t handler;
1950} capi_send_handler_table[] = {
1951 /* most frequent messages first for faster lookup */
1952 { CAPI_DATA_B3_REQ, do_data_b3_req },
1953 { CAPI_DATA_B3_RESP, do_data_b3_resp },
1954
1955 { CAPI_ALERT_REQ, do_alert_req },
1956 { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
1957 { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
1958 { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
1959 { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
1960 { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
1961 { CAPI_CONNECT_REQ, do_connect_req },
1962 { CAPI_CONNECT_RESP, do_connect_resp },
1963 { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
1964 { CAPI_DISCONNECT_B3_RESP, do_nothing },
1965 { CAPI_DISCONNECT_REQ, do_disconnect_req },
1966 { CAPI_DISCONNECT_RESP, do_nothing },
1967 { CAPI_FACILITY_REQ, do_facility_req },
1968 { CAPI_FACILITY_RESP, do_nothing },
1969 { CAPI_LISTEN_REQ, do_listen_req },
1970 { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
1971 { CAPI_RESET_B3_REQ, do_reset_b3_req },
1972 { CAPI_RESET_B3_RESP, do_nothing },
1973
1974 /*
1975 * ToDo: support overlap sending (requires ev-layer state
1976 * machine extension to generate additional ATD commands)
1977 */
1978 { CAPI_INFO_REQ, do_unsupported },
1979 { CAPI_INFO_RESP, do_nothing },
1980
1981 /*
1982 * ToDo: what's the proper response for these?
1983 */
1984 { CAPI_MANUFACTURER_REQ, do_nothing },
1985 { CAPI_MANUFACTURER_RESP, do_nothing },
1986};
1987
1988/* look up handler */
1989static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
1990{
1991 size_t i;
1992
1993 for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
1994 if (capi_send_handler_table[i].cmd == cmd)
1995 return capi_send_handler_table[i].handler;
1996 return NULL;
1997}
1998
1999
2000/**
2001 * gigaset_send_message() - accept a CAPI message from an application
2002 * @ctr: controller descriptor structure.
2003 * @skb: CAPI message.
2004 *
2005 * Return value: CAPI error code
2006 * Note: capidrv (and probably others, too) only uses the return value to
2007 * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
2008 */
2009static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
2010{
2011 struct gigaset_capi_ctr *iif
2012 = container_of(ctr, struct gigaset_capi_ctr, ctr);
2013 struct cardstate *cs = ctr->driverdata;
2014 struct gigaset_capi_appl *ap;
2015 capi_send_handler_t handler;
2016
2017 /* can only handle linear sk_buffs */
2018 if (skb_linearize(skb) < 0) {
2019 dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
2020 return CAPI_MSGOSRESOURCEERR;
2021 }
2022
2023 /* retrieve application data structure */
2024 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2025 if (!ap) {
2026 dev_notice(cs->dev, "%s: application %u not registered\n",
2027 __func__, CAPIMSG_APPID(skb->data));
2028 return CAPI_ILLAPPNR;
2029 }
2030
2031 /* look up command */
2032 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2033 if (!handler) {
2034 /* unknown/unsupported message type */
2035 if (printk_ratelimit())
2036 dev_notice(cs->dev, "%s: unsupported message %u\n",
2037 __func__, CAPIMSG_CMD(skb->data));
2038 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
2039 }
2040
2041 /* serialize */
2042 if (atomic_add_return(1, &iif->sendqlen) > 1) {
2043 /* queue behind other messages */
2044 skb_queue_tail(&iif->sendqueue, skb);
2045 return CAPI_NOERROR;
2046 }
2047
2048 /* process message */
2049 handler(iif, ap, skb);
2050
2051 /* process other messages arrived in the meantime */
2052 while (atomic_sub_return(1, &iif->sendqlen) > 0) {
2053 skb = skb_dequeue(&iif->sendqueue);
2054 if (!skb) {
2055 /* should never happen */
2056 dev_err(cs->dev, "%s: send queue empty\n", __func__);
2057 continue;
2058 }
2059 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2060 if (!ap) {
2061 /* could that happen? */
2062 dev_warn(cs->dev, "%s: application %u vanished\n",
2063 __func__, CAPIMSG_APPID(skb->data));
2064 continue;
2065 }
2066 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2067 if (!handler) {
2068 /* should never happen */
2069 dev_err(cs->dev, "%s: handler %x vanished\n",
2070 __func__, CAPIMSG_CMD(skb->data));
2071 continue;
2072 }
2073 handler(iif, ap, skb);
2074 }
2075
2076 return CAPI_NOERROR;
2077}
2078
2079/**
2080 * gigaset_procinfo() - build single line description for controller
2081 * @ctr: controller descriptor structure.
2082 *
2083 * Return value: pointer to generated string (null terminated)
2084 */
2085static char *gigaset_procinfo(struct capi_ctr *ctr)
2086{
2087 return ctr->name; /* ToDo: more? */
2088}
2089
2090/**
2091 * gigaset_ctr_read_proc() - build controller proc file entry
2092 * @page: buffer of PAGE_SIZE bytes for receiving the entry.
2093 * @start: unused.
2094 * @off: unused.
2095 * @count: unused.
2096 * @eof: unused.
2097 * @ctr: controller descriptor structure.
2098 *
2099 * Return value: length of generated entry
2100 */
2101static int gigaset_ctr_read_proc(char *page, char **start, off_t off,
2102 int count, int *eof, struct capi_ctr *ctr)
2103{
2104 struct cardstate *cs = ctr->driverdata;
2105 char *s;
2106 int i;
2107 int len = 0;
2108 len += sprintf(page+len, "%-16s %s\n", "name", ctr->name);
2109 len += sprintf(page+len, "%-16s %s %s\n", "dev",
2110 dev_driver_string(cs->dev), dev_name(cs->dev));
2111 len += sprintf(page+len, "%-16s %d\n", "id", cs->myid);
2112 if (cs->gotfwver)
2113 len += sprintf(page+len, "%-16s %d.%d.%d.%d\n", "firmware",
2114 cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
2115 len += sprintf(page+len, "%-16s %d\n", "channels",
2116 cs->channels);
2117 len += sprintf(page+len, "%-16s %s\n", "onechannel",
2118 cs->onechannel ? "yes" : "no");
2119
2120 switch (cs->mode) {
2121 case M_UNKNOWN:
2122 s = "unknown";
2123 break;
2124 case M_CONFIG:
2125 s = "config";
2126 break;
2127 case M_UNIMODEM:
2128 s = "Unimodem";
2129 break;
2130 case M_CID:
2131 s = "CID";
2132 break;
2133 default:
2134 s = "??";
2135 }
2136 len += sprintf(page+len, "%-16s %s\n", "mode", s);
2137
2138 switch (cs->mstate) {
2139 case MS_UNINITIALIZED:
2140 s = "uninitialized";
2141 break;
2142 case MS_INIT:
2143 s = "init";
2144 break;
2145 case MS_LOCKED:
2146 s = "locked";
2147 break;
2148 case MS_SHUTDOWN:
2149 s = "shutdown";
2150 break;
2151 case MS_RECOVER:
2152 s = "recover";
2153 break;
2154 case MS_READY:
2155 s = "ready";
2156 break;
2157 default:
2158 s = "??";
2159 }
2160 len += sprintf(page+len, "%-16s %s\n", "mstate", s);
2161
2162 len += sprintf(page+len, "%-16s %s\n", "running",
2163 cs->running ? "yes" : "no");
2164 len += sprintf(page+len, "%-16s %s\n", "connected",
2165 cs->connected ? "yes" : "no");
2166 len += sprintf(page+len, "%-16s %s\n", "isdn_up",
2167 cs->isdn_up ? "yes" : "no");
2168 len += sprintf(page+len, "%-16s %s\n", "cidmode",
2169 cs->cidmode ? "yes" : "no");
2170
2171 for (i = 0; i < cs->channels; i++) {
2172 len += sprintf(page+len, "[%d]%-13s %d\n", i, "corrupted",
2173 cs->bcs[i].corrupted);
2174 len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_down",
2175 cs->bcs[i].trans_down);
2176 len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_up",
2177 cs->bcs[i].trans_up);
2178 len += sprintf(page+len, "[%d]%-13s %d\n", i, "chstate",
2179 cs->bcs[i].chstate);
2180 switch (cs->bcs[i].proto2) {
2181 case L2_BITSYNC:
2182 s = "bitsync";
2183 break;
2184 case L2_HDLC:
2185 s = "HDLC";
2186 break;
2187 case L2_VOICE:
2188 s = "voice";
2189 break;
2190 default:
2191 s = "??";
2192 }
2193 len += sprintf(page+len, "[%d]%-13s %s\n", i, "proto2", s);
2194 }
2195 return len;
2196}
2197
2198
2199static struct capi_driver capi_driver_gigaset = {
2200 .name = "gigaset",
2201 .revision = "1.0",
2202};
2203
2204/**
2205 * gigaset_isdn_register() - register to LL
2206 * @cs: device descriptor structure.
2207 * @isdnid: device name.
2208 *
2209 * Called by main module to register the device with the LL.
2210 *
2211 * Return value: 1 for success, 0 for failure
2212 */
2213int gigaset_isdn_register(struct cardstate *cs, const char *isdnid)
2214{
2215 struct gigaset_capi_ctr *iif;
2216 int rc;
2217
2218 pr_info("Kernel CAPI interface\n");
2219
2220 iif = kmalloc(sizeof(*iif), GFP_KERNEL);
2221 if (!iif) {
2222 pr_err("%s: out of memory\n", __func__);
2223 return 0;
2224 }
2225
2226 /* register driver with CAPI (ToDo: what for?) */
2227 register_capi_driver(&capi_driver_gigaset);
2228
2229 /* prepare controller structure */
2230 iif->ctr.owner = THIS_MODULE;
2231 iif->ctr.driverdata = cs;
2232 strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
2233 iif->ctr.driver_name = "gigaset";
2234 iif->ctr.load_firmware = gigaset_load_firmware;
2235 iif->ctr.reset_ctr = gigaset_reset_ctr;
2236 iif->ctr.register_appl = gigaset_register_appl;
2237 iif->ctr.release_appl = gigaset_release_appl;
2238 iif->ctr.send_message = gigaset_send_message;
2239 iif->ctr.procinfo = gigaset_procinfo;
2240 iif->ctr.ctr_read_proc = gigaset_ctr_read_proc;
2241 INIT_LIST_HEAD(&iif->appls);
2242 skb_queue_head_init(&iif->sendqueue);
2243 atomic_set(&iif->sendqlen, 0);
2244
2245 /* register controller with CAPI */
2246 rc = attach_capi_ctr(&iif->ctr);
2247 if (rc) {
2248 pr_err("attach_capi_ctr failed (%d)\n", rc);
2249 unregister_capi_driver(&capi_driver_gigaset);
2250 kfree(iif);
2251 return 0;
2252 }
2253
2254 cs->iif = iif;
2255 cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
2256 return 1;
2257}
2258
2259/**
2260 * gigaset_isdn_unregister() - unregister from LL
2261 * @cs: device descriptor structure.
2262 *
2263 * Called by main module to unregister the device from the LL.
2264 */
2265void gigaset_isdn_unregister(struct cardstate *cs)
2266{
2267 struct gigaset_capi_ctr *iif = cs->iif;
2268
2269 detach_capi_ctr(&iif->ctr);
2270 kfree(iif);
2271 cs->iif = NULL;
2272 unregister_capi_driver(&capi_driver_gigaset);
2273}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 00:51:10 -0500