1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Kernel CAPI interface for the Gigaset driver
4 *
5 * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
6 *
7 * =====================================================================
8 * =====================================================================
9 */
10
11 #include "gigaset.h"
12 #include <linux/proc_fs.h>
13 #include <linux/seq_file.h>
14 #include <linux/ratelimit.h>
15 #include <linux/isdn/capilli.h>
16 #include <linux/isdn/capicmd.h>
17 #include <linux/isdn/capiutil.h>
18 #include <linux/export.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 #define CAPI_SUPPSVC_LISTEN 0x0001
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 bcs->apconnstate */
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 struct capi_register_params rp;
84 u16 nextMessageNumber;
85 u32 listenInfoMask;
86 u32 listenCIPmask;
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 }, /* Speech (A-law) */
110 [2] = { "8890", NULL }, /* Unrestricted digital information */
111 [3] = { "8990", NULL }, /* Restricted digital information */
112 [4] = { "9090A3", NULL }, /* 3,1 kHz audio (A-law) */
113 [5] = { "9190", NULL }, /* 7 kHz audio */
114 [6] = { "9890", NULL }, /* Video */
115 [7] = { "88C0C6E6", NULL }, /* Packet mode */
116 [8] = { "8890218F", NULL }, /* 56 kbit/s rate adaptation */
117 [9] = { "9190A5", NULL }, /* Unrestricted digital information
118 * with tones/announcements */
119 [16] = { "8090A3", "9181" }, /* Telephony */
120 [17] = { "9090A3", "9184" }, /* Group 2/3 facsimile */
121 [18] = { "8890", "91A1" }, /* Group 4 facsimile Class 1 */
122 [19] = { "8890", "91A4" }, /* Teletex service basic and mixed mode
123 * and Group 4 facsimile service
124 * Classes II and III */
125 [20] = { "8890", "91A8" }, /* Teletex service basic and
126 * processable mode */
127 [21] = { "8890", "91B1" }, /* Teletex service basic mode */
128 [22] = { "8890", "91B2" }, /* International interworking for
129 * Videotex */
130 [23] = { "8890", "91B5" }, /* Telex */
131 [24] = { "8890", "91B8" }, /* Message Handling Systems
132 * in accordance with X.400 */
133 [25] = { "8890", "91C1" }, /* OSI application
134 * in accordance with X.200 */
135 [26] = { "9190A5", "9181" }, /* 7 kHz telephony */
136 [27] = { "9190A5", "916001" }, /* Video telephony, first connection */
137 [28] = { "8890", "916002" }, /* Video telephony, second connection */
138 };
139
140 /*
141 * helper functions
142 * ================
143 */
144
145 /*
146 * emit unsupported parameter warning
147 */
ignore_cstruct_param(struct cardstate * cs,_cstruct param,char * msgname,char * paramname)148 static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
149 char *msgname, char *paramname)
150 {
151 if (param && *param)
152 dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
153 msgname, paramname);
154 }
155
156 /*
157 * convert an IE from Gigaset hex string to ETSI binary representation
158 * including length byte
159 * return value: result length, -1 on error
160 */
encode_ie(char * in,u8 * out,int maxlen)161 static int encode_ie(char *in, u8 *out, int maxlen)
162 {
163 int l = 0;
164 while (*in) {
165 if (!isxdigit(in[0]) || !isxdigit(in[1]) || l >= maxlen)
166 return -1;
167 out[++l] = (hex_to_bin(in[0]) << 4) + hex_to_bin(in[1]);
168 in += 2;
169 }
170 out[0] = l;
171 return l;
172 }
173
174 /*
175 * convert an IE from ETSI binary representation including length byte
176 * to Gigaset hex string
177 */
decode_ie(u8 * in,char * out)178 static void decode_ie(u8 *in, char *out)
179 {
180 int i = *in;
181 while (i-- > 0) {
182 /* ToDo: conversion to upper case necessary? */
183 *out++ = toupper(hex_asc_hi(*++in));
184 *out++ = toupper(hex_asc_lo(*in));
185 }
186 }
187
188 /*
189 * retrieve application data structure for an application ID
190 */
191 static inline struct gigaset_capi_appl *
get_appl(struct gigaset_capi_ctr * iif,u16 appl)192 get_appl(struct gigaset_capi_ctr *iif, u16 appl)
193 {
194 struct gigaset_capi_appl *ap;
195
196 list_for_each_entry(ap, &iif->appls, ctrlist)
197 if (ap->id == appl)
198 return ap;
199 return NULL;
200 }
201
202 /*
203 * dump CAPI message to kernel messages for debugging
204 */
dump_cmsg(enum debuglevel level,const char * tag,_cmsg * p)205 static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
206 {
207 #ifdef CONFIG_GIGASET_DEBUG
208 /* dump at most 20 messages in 20 secs */
209 static DEFINE_RATELIMIT_STATE(msg_dump_ratelimit, 20 * HZ, 20);
210 _cdebbuf *cdb;
211
212 if (!(gigaset_debuglevel & level))
213 return;
214 if (!___ratelimit(&msg_dump_ratelimit, tag))
215 return;
216
217 cdb = capi_cmsg2str(p);
218 if (cdb) {
219 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
220 cdebbuf_free(cdb);
221 } else {
222 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
223 capi_cmd2str(p->Command, p->Subcommand));
224 }
225 #endif
226 }
227
dump_rawmsg(enum debuglevel level,const char * tag,unsigned char * data)228 static inline void dump_rawmsg(enum debuglevel level, const char *tag,
229 unsigned char *data)
230 {
231 #ifdef CONFIG_GIGASET_DEBUG
232 char *dbgline;
233 int i, l;
234
235 if (!(gigaset_debuglevel & level))
236 return;
237
238 l = CAPIMSG_LEN(data);
239 if (l < 12) {
240 gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
241 return;
242 }
243 gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
244 tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
245 CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
246 CAPIMSG_CONTROL(data));
247 l -= 12;
248 if (l <= 0)
249 return;
250 if (l > 64)
251 l = 64; /* arbitrary limit */
252 dbgline = kmalloc_array(3, l, GFP_ATOMIC);
253 if (!dbgline)
254 return;
255 for (i = 0; i < l; i++) {
256 dbgline[3 * i] = hex_asc_hi(data[12 + i]);
257 dbgline[3 * i + 1] = hex_asc_lo(data[12 + i]);
258 dbgline[3 * i + 2] = ' ';
259 }
260 dbgline[3 * l - 1] = '\0';
261 gig_dbg(level, " %s", dbgline);
262 kfree(dbgline);
263 if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
264 (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
265 CAPIMSG_SUBCOMMAND(data) == CAPI_IND)) {
266 l = CAPIMSG_DATALEN(data);
267 gig_dbg(level, " DataLength=%d", l);
268 if (l <= 0 || !(gigaset_debuglevel & DEBUG_LLDATA))
269 return;
270 if (l > 64)
271 l = 64; /* arbitrary limit */
272 dbgline = kmalloc_array(3, l, GFP_ATOMIC);
273 if (!dbgline)
274 return;
275 data += CAPIMSG_LEN(data);
276 for (i = 0; i < l; i++) {
277 dbgline[3 * i] = hex_asc_hi(data[i]);
278 dbgline[3 * i + 1] = hex_asc_lo(data[i]);
279 dbgline[3 * i + 2] = ' ';
280 }
281 dbgline[3 * l - 1] = '\0';
282 gig_dbg(level, " %s", dbgline);
283 kfree(dbgline);
284 }
285 #endif
286 }
287
288 /*
289 * format CAPI IE as string
290 */
291
292 #ifdef CONFIG_GIGASET_DEBUG
format_ie(const char * ie)293 static const char *format_ie(const char *ie)
294 {
295 static char result[3 * MAX_FMT_IE_LEN];
296 int len, count;
297 char *pout = result;
298
299 if (!ie)
300 return "NULL";
301
302 count = len = ie[0];
303 if (count > MAX_FMT_IE_LEN)
304 count = MAX_FMT_IE_LEN - 1;
305 while (count--) {
306 *pout++ = hex_asc_hi(*++ie);
307 *pout++ = hex_asc_lo(*ie);
308 *pout++ = ' ';
309 }
310 if (len > MAX_FMT_IE_LEN) {
311 *pout++ = '.';
312 *pout++ = '.';
313 *pout++ = '.';
314 }
315 *--pout = 0;
316 return result;
317 }
318 #endif
319
320 /*
321 * emit DATA_B3_CONF message
322 */
send_data_b3_conf(struct cardstate * cs,struct capi_ctr * ctr,u16 appl,u16 msgid,int channel,u16 handle,u16 info)323 static void send_data_b3_conf(struct cardstate *cs, struct capi_ctr *ctr,
324 u16 appl, u16 msgid, int channel,
325 u16 handle, u16 info)
326 {
327 struct sk_buff *cskb;
328 u8 *msg;
329
330 cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
331 if (!cskb) {
332 dev_err(cs->dev, "%s: out of memory\n", __func__);
333 return;
334 }
335 /* frequent message, avoid _cmsg overhead */
336 msg = __skb_put(cskb, CAPI_DATA_B3_CONF_LEN);
337 CAPIMSG_SETLEN(msg, CAPI_DATA_B3_CONF_LEN);
338 CAPIMSG_SETAPPID(msg, appl);
339 CAPIMSG_SETCOMMAND(msg, CAPI_DATA_B3);
340 CAPIMSG_SETSUBCOMMAND(msg, CAPI_CONF);
341 CAPIMSG_SETMSGID(msg, msgid);
342 CAPIMSG_SETCONTROLLER(msg, ctr->cnr);
343 CAPIMSG_SETPLCI_PART(msg, channel);
344 CAPIMSG_SETNCCI_PART(msg, 1);
345 CAPIMSG_SETHANDLE_CONF(msg, handle);
346 CAPIMSG_SETINFO_CONF(msg, info);
347
348 /* emit message */
349 dump_rawmsg(DEBUG_MCMD, __func__, msg);
350 capi_ctr_handle_message(ctr, appl, cskb);
351 }
352
353
354 /*
355 * driver interface functions
356 * ==========================
357 */
358
359 /**
360 * gigaset_skb_sent() - acknowledge transmission of outgoing skb
361 * @bcs: B channel descriptor structure.
362 * @skb: sent data.
363 *
364 * Called by hardware module {bas,ser,usb}_gigaset when the data in a
365 * skb has been successfully sent, for signalling completion to the LL.
366 */
gigaset_skb_sent(struct bc_state * bcs,struct sk_buff * dskb)367 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
368 {
369 struct cardstate *cs = bcs->cs;
370 struct gigaset_capi_ctr *iif = cs->iif;
371 struct gigaset_capi_appl *ap = bcs->ap;
372 unsigned char *req = skb_mac_header(dskb);
373 u16 flags;
374
375 /* update statistics */
376 ++bcs->trans_up;
377
378 if (!ap) {
379 gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
380 return;
381 }
382
383 /* don't send further B3 messages if disconnected */
384 if (bcs->apconnstate < APCONN_ACTIVE) {
385 gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
386 return;
387 }
388
389 /*
390 * send DATA_B3_CONF if "delivery confirmation" bit was set in request;
391 * otherwise it has already been sent by do_data_b3_req()
392 */
393 flags = CAPIMSG_FLAGS(req);
394 if (flags & CAPI_FLAGS_DELIVERY_CONFIRMATION)
395 send_data_b3_conf(cs, &iif->ctr, ap->id, CAPIMSG_MSGID(req),
396 bcs->channel + 1, CAPIMSG_HANDLE_REQ(req),
397 (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) ?
398 CapiFlagsNotSupportedByProtocol :
399 CAPI_NOERROR);
400 }
401 EXPORT_SYMBOL_GPL(gigaset_skb_sent);
402
403 /**
404 * gigaset_skb_rcvd() - pass received skb to LL
405 * @bcs: B channel descriptor structure.
406 * @skb: received data.
407 *
408 * Called by hardware module {bas,ser,usb}_gigaset when user data has
409 * been successfully received, for passing to the LL.
410 * Warning: skb must not be accessed anymore!
411 */
gigaset_skb_rcvd(struct bc_state * bcs,struct sk_buff * skb)412 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
413 {
414 struct cardstate *cs = bcs->cs;
415 struct gigaset_capi_ctr *iif = cs->iif;
416 struct gigaset_capi_appl *ap = bcs->ap;
417 int len = skb->len;
418
419 /* update statistics */
420 bcs->trans_down++;
421
422 if (!ap) {
423 gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
424 dev_kfree_skb_any(skb);
425 return;
426 }
427
428 /* don't send further B3 messages if disconnected */
429 if (bcs->apconnstate < APCONN_ACTIVE) {
430 gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
431 dev_kfree_skb_any(skb);
432 return;
433 }
434
435 /*
436 * prepend DATA_B3_IND message to payload
437 * Parameters: NCCI = 1, all others 0/unused
438 * frequent message, avoid _cmsg overhead
439 */
440 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
441 CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
442 CAPIMSG_SETAPPID(skb->data, ap->id);
443 CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
444 CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
445 CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
446 CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
447 CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
448 CAPIMSG_SETNCCI_PART(skb->data, 1);
449 /* Data parameter not used */
450 CAPIMSG_SETDATALEN(skb->data, len);
451 /* Data handle parameter not used */
452 CAPIMSG_SETFLAGS(skb->data, 0);
453 /* Data64 parameter not present */
454
455 /* emit message */
456 dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
457 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
458 }
459 EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
460
461 /**
462 * gigaset_isdn_rcv_err() - signal receive error
463 * @bcs: B channel descriptor structure.
464 *
465 * Called by hardware module {bas,ser,usb}_gigaset when a receive error
466 * has occurred, for signalling to the LL.
467 */
gigaset_isdn_rcv_err(struct bc_state * bcs)468 void gigaset_isdn_rcv_err(struct bc_state *bcs)
469 {
470 /* if currently ignoring packets, just count down */
471 if (bcs->ignore) {
472 bcs->ignore--;
473 return;
474 }
475
476 /* update statistics */
477 bcs->corrupted++;
478
479 /* ToDo: signal error -> LL */
480 }
481 EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
482
483 /**
484 * gigaset_isdn_icall() - signal incoming call
485 * @at_state: connection state structure.
486 *
487 * Called by main module at tasklet level to notify the LL that an incoming
488 * call has been received. @at_state contains the parameters of the call.
489 *
490 * Return value: call disposition (ICALL_*)
491 */
gigaset_isdn_icall(struct at_state_t * at_state)492 int gigaset_isdn_icall(struct at_state_t *at_state)
493 {
494 struct cardstate *cs = at_state->cs;
495 struct bc_state *bcs = at_state->bcs;
496 struct gigaset_capi_ctr *iif = cs->iif;
497 struct gigaset_capi_appl *ap;
498 u32 actCIPmask;
499 struct sk_buff *skb;
500 unsigned int msgsize;
501 unsigned long flags;
502 int i;
503
504 /*
505 * ToDo: signal calls without a free B channel, too
506 * (requires a u8 handle for the at_state structure that can
507 * be stored in the PLCI and used in the CONNECT_RESP message
508 * handler to retrieve it)
509 */
510 if (!bcs)
511 return ICALL_IGNORE;
512
513 /* prepare CONNECT_IND message, using B channel number as PLCI */
514 capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
515 iif->ctr.cnr | ((bcs->channel + 1) << 8));
516
517 /* minimum size, all structs empty */
518 msgsize = CAPI_CONNECT_IND_BASELEN;
519
520 /* Bearer Capability (mandatory) */
521 if (at_state->str_var[STR_ZBC]) {
522 /* pass on BC from Gigaset */
523 if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
524 MAX_BC_OCTETS) < 0) {
525 dev_warn(cs->dev, "RING ignored - bad BC %s\n",
526 at_state->str_var[STR_ZBC]);
527 return ICALL_IGNORE;
528 }
529
530 /* look up corresponding CIP value */
531 iif->hcmsg.CIPValue = 0; /* default if nothing found */
532 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
533 if (cip2bchlc[i].bc != NULL &&
534 cip2bchlc[i].hlc == NULL &&
535 !strcmp(cip2bchlc[i].bc,
536 at_state->str_var[STR_ZBC])) {
537 iif->hcmsg.CIPValue = i;
538 break;
539 }
540 } else {
541 /* no BC (internal call): assume CIP 1 (speech, A-law) */
542 iif->hcmsg.CIPValue = 1;
543 encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
544 }
545 iif->hcmsg.BC = iif->bc_buf;
546 msgsize += iif->hcmsg.BC[0];
547
548 /* High Layer Compatibility (optional) */
549 if (at_state->str_var[STR_ZHLC]) {
550 /* pass on HLC from Gigaset */
551 if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
552 MAX_HLC_OCTETS) < 0) {
553 dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
554 at_state->str_var[STR_ZHLC]);
555 return ICALL_IGNORE;
556 }
557 iif->hcmsg.HLC = iif->hlc_buf;
558 msgsize += iif->hcmsg.HLC[0];
559
560 /* look up corresponding CIP value */
561 /* keep BC based CIP value if none found */
562 if (at_state->str_var[STR_ZBC])
563 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
564 if (cip2bchlc[i].hlc != NULL &&
565 !strcmp(cip2bchlc[i].hlc,
566 at_state->str_var[STR_ZHLC]) &&
567 !strcmp(cip2bchlc[i].bc,
568 at_state->str_var[STR_ZBC])) {
569 iif->hcmsg.CIPValue = i;
570 break;
571 }
572 }
573
574 /* Called Party Number (optional) */
575 if (at_state->str_var[STR_ZCPN]) {
576 i = strlen(at_state->str_var[STR_ZCPN]);
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->cdpty_buf[0] = i + 1;
583 iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
584 memcpy(iif->cdpty_buf + 2, at_state->str_var[STR_ZCPN], i);
585 iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
586 msgsize += iif->hcmsg.CalledPartyNumber[0];
587 }
588
589 /* Calling Party Number (optional) */
590 if (at_state->str_var[STR_NMBR]) {
591 i = strlen(at_state->str_var[STR_NMBR]);
592 if (i > MAX_NUMBER_DIGITS) {
593 dev_warn(cs->dev, "RING ignored - bad number %s\n",
594 at_state->str_var[STR_ZBC]);
595 return ICALL_IGNORE;
596 }
597 iif->cgpty_buf[0] = i + 2;
598 iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
599 iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
600 memcpy(iif->cgpty_buf + 3, at_state->str_var[STR_NMBR], i);
601 iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
602 msgsize += iif->hcmsg.CallingPartyNumber[0];
603 }
604
605 /* remaining parameters (not supported, always left NULL):
606 * - CalledPartySubaddress
607 * - CallingPartySubaddress
608 * - AdditionalInfo
609 * - BChannelinformation
610 * - Keypadfacility
611 * - Useruserdata
612 * - Facilitydataarray
613 */
614
615 gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
616 iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
617 format_ie(iif->hcmsg.BC));
618 gig_dbg(DEBUG_CMD, "icall: HLC %s",
619 format_ie(iif->hcmsg.HLC));
620 gig_dbg(DEBUG_CMD, "icall: CgPty %s",
621 format_ie(iif->hcmsg.CallingPartyNumber));
622 gig_dbg(DEBUG_CMD, "icall: CdPty %s",
623 format_ie(iif->hcmsg.CalledPartyNumber));
624
625 /* scan application list for matching listeners */
626 spin_lock_irqsave(&bcs->aplock, flags);
627 if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE) {
628 dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
629 __func__, bcs->ap, bcs->apconnstate);
630 bcs->ap = NULL;
631 bcs->apconnstate = APCONN_NONE;
632 }
633 spin_unlock_irqrestore(&bcs->aplock, flags);
634 actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
635 list_for_each_entry(ap, &iif->appls, ctrlist)
636 if (actCIPmask & ap->listenCIPmask) {
637 /* build CONNECT_IND message for this application */
638 iif->hcmsg.ApplId = ap->id;
639 iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
640
641 skb = alloc_skb(msgsize, GFP_ATOMIC);
642 if (!skb) {
643 dev_err(cs->dev, "%s: out of memory\n",
644 __func__);
645 break;
646 }
647 if (capi_cmsg2message(&iif->hcmsg,
648 __skb_put(skb, msgsize))) {
649 dev_err(cs->dev, "%s: message parser failure\n",
650 __func__);
651 dev_kfree_skb_any(skb);
652 break;
653 }
654 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
655
656 /* add to listeners on this B channel, update state */
657 spin_lock_irqsave(&bcs->aplock, flags);
658 ap->bcnext = bcs->ap;
659 bcs->ap = ap;
660 bcs->chstate |= CHS_NOTIFY_LL;
661 bcs->apconnstate = APCONN_SETUP;
662 spin_unlock_irqrestore(&bcs->aplock, flags);
663
664 /* emit message */
665 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
666 }
667
668 /*
669 * Return "accept" if any listeners.
670 * Gigaset will send ALERTING.
671 * There doesn't seem to be a way to avoid this.
672 */
673 return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
674 }
675
676 /*
677 * send a DISCONNECT_IND message to an application
678 * does not sleep, clobbers the controller's hcmsg structure
679 */
send_disconnect_ind(struct bc_state * bcs,struct gigaset_capi_appl * ap,u16 reason)680 static void send_disconnect_ind(struct bc_state *bcs,
681 struct gigaset_capi_appl *ap, u16 reason)
682 {
683 struct cardstate *cs = bcs->cs;
684 struct gigaset_capi_ctr *iif = cs->iif;
685 struct sk_buff *skb;
686
687 if (bcs->apconnstate == APCONN_NONE)
688 return;
689
690 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
691 ap->nextMessageNumber++,
692 iif->ctr.cnr | ((bcs->channel + 1) << 8));
693 iif->hcmsg.Reason = reason;
694 skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
695 if (!skb) {
696 dev_err(cs->dev, "%s: out of memory\n", __func__);
697 return;
698 }
699 if (capi_cmsg2message(&iif->hcmsg,
700 __skb_put(skb, CAPI_DISCONNECT_IND_LEN))) {
701 dev_err(cs->dev, "%s: message parser failure\n", __func__);
702 dev_kfree_skb_any(skb);
703 return;
704 }
705 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
706 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
707 }
708
709 /*
710 * send a DISCONNECT_B3_IND message to an application
711 * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
712 * does not sleep, clobbers the controller's hcmsg structure
713 */
send_disconnect_b3_ind(struct bc_state * bcs,struct gigaset_capi_appl * ap)714 static void send_disconnect_b3_ind(struct bc_state *bcs,
715 struct gigaset_capi_appl *ap)
716 {
717 struct cardstate *cs = bcs->cs;
718 struct gigaset_capi_ctr *iif = cs->iif;
719 struct sk_buff *skb;
720
721 /* nothing to do if no logical connection active */
722 if (bcs->apconnstate < APCONN_ACTIVE)
723 return;
724 bcs->apconnstate = APCONN_SETUP;
725
726 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
727 ap->nextMessageNumber++,
728 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
729 skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
730 if (!skb) {
731 dev_err(cs->dev, "%s: out of memory\n", __func__);
732 return;
733 }
734 if (capi_cmsg2message(&iif->hcmsg,
735 __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN))) {
736 dev_err(cs->dev, "%s: message parser failure\n", __func__);
737 dev_kfree_skb_any(skb);
738 return;
739 }
740 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
741 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
742 }
743
744 /**
745 * gigaset_isdn_connD() - signal D channel connect
746 * @bcs: B channel descriptor structure.
747 *
748 * Called by main module at tasklet level to notify the LL that the D channel
749 * connection has been established.
750 */
gigaset_isdn_connD(struct bc_state * bcs)751 void gigaset_isdn_connD(struct bc_state *bcs)
752 {
753 struct cardstate *cs = bcs->cs;
754 struct gigaset_capi_ctr *iif = cs->iif;
755 struct gigaset_capi_appl *ap;
756 struct sk_buff *skb;
757 unsigned int msgsize;
758 unsigned long flags;
759
760 spin_lock_irqsave(&bcs->aplock, flags);
761 ap = bcs->ap;
762 if (!ap) {
763 spin_unlock_irqrestore(&bcs->aplock, flags);
764 gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
765 return;
766 }
767 if (bcs->apconnstate == APCONN_NONE) {
768 spin_unlock_irqrestore(&bcs->aplock, flags);
769 dev_warn(cs->dev, "%s: application %u not connected\n",
770 __func__, ap->id);
771 return;
772 }
773 spin_unlock_irqrestore(&bcs->aplock, flags);
774 while (ap->bcnext) {
775 /* this should never happen */
776 dev_warn(cs->dev, "%s: dropping extra application %u\n",
777 __func__, ap->bcnext->id);
778 send_disconnect_ind(bcs, ap->bcnext,
779 CapiCallGivenToOtherApplication);
780 ap->bcnext = ap->bcnext->bcnext;
781 }
782
783 /* prepare CONNECT_ACTIVE_IND message
784 * Note: LLC not supported by device
785 */
786 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
787 ap->nextMessageNumber++,
788 iif->ctr.cnr | ((bcs->channel + 1) << 8));
789
790 /* minimum size, all structs empty */
791 msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
792
793 /* ToDo: set parameter: Connected number
794 * (requires ev-layer state machine extension to collect
795 * ZCON device reply)
796 */
797
798 /* build and emit CONNECT_ACTIVE_IND message */
799 skb = alloc_skb(msgsize, GFP_ATOMIC);
800 if (!skb) {
801 dev_err(cs->dev, "%s: out of memory\n", __func__);
802 return;
803 }
804 if (capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize))) {
805 dev_err(cs->dev, "%s: message parser failure\n", __func__);
806 dev_kfree_skb_any(skb);
807 return;
808 }
809 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
810 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
811 }
812
813 /**
814 * gigaset_isdn_hupD() - signal D channel hangup
815 * @bcs: B channel descriptor structure.
816 *
817 * Called by main module at tasklet level to notify the LL that the D channel
818 * connection has been shut down.
819 */
gigaset_isdn_hupD(struct bc_state * bcs)820 void gigaset_isdn_hupD(struct bc_state *bcs)
821 {
822 struct gigaset_capi_appl *ap;
823 unsigned long flags;
824
825 /*
826 * ToDo: pass on reason code reported by device
827 * (requires ev-layer state machine extension to collect
828 * ZCAU device reply)
829 */
830 spin_lock_irqsave(&bcs->aplock, flags);
831 while (bcs->ap != NULL) {
832 ap = bcs->ap;
833 bcs->ap = ap->bcnext;
834 spin_unlock_irqrestore(&bcs->aplock, flags);
835 send_disconnect_b3_ind(bcs, ap);
836 send_disconnect_ind(bcs, ap, 0);
837 spin_lock_irqsave(&bcs->aplock, flags);
838 }
839 bcs->apconnstate = APCONN_NONE;
840 spin_unlock_irqrestore(&bcs->aplock, flags);
841 }
842
843 /**
844 * gigaset_isdn_connB() - signal B channel connect
845 * @bcs: B channel descriptor structure.
846 *
847 * Called by main module at tasklet level to notify the LL that the B channel
848 * connection has been established.
849 */
gigaset_isdn_connB(struct bc_state * bcs)850 void gigaset_isdn_connB(struct bc_state *bcs)
851 {
852 struct cardstate *cs = bcs->cs;
853 struct gigaset_capi_ctr *iif = cs->iif;
854 struct gigaset_capi_appl *ap;
855 struct sk_buff *skb;
856 unsigned long flags;
857 unsigned int msgsize;
858 u8 command;
859
860 spin_lock_irqsave(&bcs->aplock, flags);
861 ap = bcs->ap;
862 if (!ap) {
863 spin_unlock_irqrestore(&bcs->aplock, flags);
864 gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
865 return;
866 }
867 if (!bcs->apconnstate) {
868 spin_unlock_irqrestore(&bcs->aplock, flags);
869 dev_warn(cs->dev, "%s: application %u not connected\n",
870 __func__, ap->id);
871 return;
872 }
873
874 /*
875 * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
876 * otherwise we have to emit CONNECT_B3_IND first, and follow up with
877 * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
878 * Parameters in both cases always: NCCI = 1, NCPI empty
879 */
880 if (bcs->apconnstate >= APCONN_ACTIVE) {
881 command = CAPI_CONNECT_B3_ACTIVE;
882 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
883 } else {
884 command = CAPI_CONNECT_B3;
885 msgsize = CAPI_CONNECT_B3_IND_BASELEN;
886 }
887 bcs->apconnstate = APCONN_ACTIVE;
888
889 spin_unlock_irqrestore(&bcs->aplock, flags);
890
891 while (ap->bcnext) {
892 /* this should never happen */
893 dev_warn(cs->dev, "%s: dropping extra application %u\n",
894 __func__, ap->bcnext->id);
895 send_disconnect_ind(bcs, ap->bcnext,
896 CapiCallGivenToOtherApplication);
897 ap->bcnext = ap->bcnext->bcnext;
898 }
899
900 capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
901 ap->nextMessageNumber++,
902 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
903 skb = alloc_skb(msgsize, GFP_ATOMIC);
904 if (!skb) {
905 dev_err(cs->dev, "%s: out of memory\n", __func__);
906 return;
907 }
908 if (capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize))) {
909 dev_err(cs->dev, "%s: message parser failure\n", __func__);
910 dev_kfree_skb_any(skb);
911 return;
912 }
913 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
914 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
915 }
916
917 /**
918 * gigaset_isdn_hupB() - signal B channel hangup
919 * @bcs: B channel descriptor structure.
920 *
921 * Called by main module to notify the LL that the B channel connection has
922 * been shut down.
923 */
gigaset_isdn_hupB(struct bc_state * bcs)924 void gigaset_isdn_hupB(struct bc_state *bcs)
925 {
926 struct gigaset_capi_appl *ap = bcs->ap;
927
928 /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
929
930 if (!ap) {
931 gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
932 return;
933 }
934
935 send_disconnect_b3_ind(bcs, ap);
936 }
937
938 /**
939 * gigaset_isdn_start() - signal device availability
940 * @cs: device descriptor structure.
941 *
942 * Called by main module to notify the LL that the device is available for
943 * use.
944 */
gigaset_isdn_start(struct cardstate * cs)945 void gigaset_isdn_start(struct cardstate *cs)
946 {
947 struct gigaset_capi_ctr *iif = cs->iif;
948
949 /* fill profile data: manufacturer name */
950 strcpy(iif->ctr.manu, "Siemens");
951 /* CAPI and device version */
952 iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
953 iif->ctr.version.minorversion = 0;
954 /* ToDo: check/assert cs->gotfwver? */
955 iif->ctr.version.majormanuversion = cs->fwver[0];
956 iif->ctr.version.minormanuversion = cs->fwver[1];
957 /* number of B channels supported */
958 iif->ctr.profile.nbchannel = cs->channels;
959 /* global options: internal controller, supplementary services */
960 iif->ctr.profile.goptions = 0x11;
961 /* B1 protocols: 64 kbit/s HDLC or transparent */
962 iif->ctr.profile.support1 = 0x03;
963 /* B2 protocols: transparent only */
964 /* ToDo: X.75 SLP ? */
965 iif->ctr.profile.support2 = 0x02;
966 /* B3 protocols: transparent only */
967 iif->ctr.profile.support3 = 0x01;
968 /* no serial number */
969 strcpy(iif->ctr.serial, "0");
970 capi_ctr_ready(&iif->ctr);
971 }
972
973 /**
974 * gigaset_isdn_stop() - signal device unavailability
975 * @cs: device descriptor structure.
976 *
977 * Called by main module to notify the LL that the device is no longer
978 * available for use.
979 */
gigaset_isdn_stop(struct cardstate * cs)980 void gigaset_isdn_stop(struct cardstate *cs)
981 {
982 struct gigaset_capi_ctr *iif = cs->iif;
983 capi_ctr_down(&iif->ctr);
984 }
985
986 /*
987 * kernel CAPI callback methods
988 * ============================
989 */
990
991 /*
992 * register CAPI application
993 */
gigaset_register_appl(struct capi_ctr * ctr,u16 appl,capi_register_params * rp)994 static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
995 capi_register_params *rp)
996 {
997 struct gigaset_capi_ctr *iif
998 = container_of(ctr, struct gigaset_capi_ctr, ctr);
999 struct cardstate *cs = ctr->driverdata;
1000 struct gigaset_capi_appl *ap;
1001
1002 gig_dbg(DEBUG_CMD, "%s [%u] l3cnt=%u blkcnt=%u blklen=%u",
1003 __func__, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
1004
1005 list_for_each_entry(ap, &iif->appls, ctrlist)
1006 if (ap->id == appl) {
1007 dev_notice(cs->dev,
1008 "application %u already registered\n", appl);
1009 return;
1010 }
1011
1012 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
1013 if (!ap) {
1014 dev_err(cs->dev, "%s: out of memory\n", __func__);
1015 return;
1016 }
1017 ap->id = appl;
1018 ap->rp = *rp;
1019
1020 list_add(&ap->ctrlist, &iif->appls);
1021 dev_info(cs->dev, "application %u registered\n", ap->id);
1022 }
1023
1024 /*
1025 * remove CAPI application from channel
1026 * helper function to keep indentation levels down and stay in 80 columns
1027 */
1028
remove_appl_from_channel(struct bc_state * bcs,struct gigaset_capi_appl * ap)1029 static inline void remove_appl_from_channel(struct bc_state *bcs,
1030 struct gigaset_capi_appl *ap)
1031 {
1032 struct cardstate *cs = bcs->cs;
1033 struct gigaset_capi_appl *bcap;
1034 unsigned long flags;
1035 int prevconnstate;
1036
1037 spin_lock_irqsave(&bcs->aplock, flags);
1038 bcap = bcs->ap;
1039 if (bcap == NULL) {
1040 spin_unlock_irqrestore(&bcs->aplock, flags);
1041 return;
1042 }
1043
1044 /* check first application on channel */
1045 if (bcap == ap) {
1046 bcs->ap = ap->bcnext;
1047 if (bcs->ap != NULL) {
1048 spin_unlock_irqrestore(&bcs->aplock, flags);
1049 return;
1050 }
1051
1052 /* none left, clear channel state */
1053 prevconnstate = bcs->apconnstate;
1054 bcs->apconnstate = APCONN_NONE;
1055 spin_unlock_irqrestore(&bcs->aplock, flags);
1056
1057 if (prevconnstate == APCONN_ACTIVE) {
1058 dev_notice(cs->dev, "%s: hanging up channel %u\n",
1059 __func__, bcs->channel);
1060 gigaset_add_event(cs, &bcs->at_state,
1061 EV_HUP, NULL, 0, NULL);
1062 gigaset_schedule_event(cs);
1063 }
1064 return;
1065 }
1066
1067 /* check remaining list */
1068 do {
1069 if (bcap->bcnext == ap) {
1070 bcap->bcnext = bcap->bcnext->bcnext;
1071 spin_unlock_irqrestore(&bcs->aplock, flags);
1072 return;
1073 }
1074 bcap = bcap->bcnext;
1075 } while (bcap != NULL);
1076 spin_unlock_irqrestore(&bcs->aplock, flags);
1077 }
1078
1079 /*
1080 * release CAPI application
1081 */
gigaset_release_appl(struct capi_ctr * ctr,u16 appl)1082 static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
1083 {
1084 struct gigaset_capi_ctr *iif
1085 = container_of(ctr, struct gigaset_capi_ctr, ctr);
1086 struct cardstate *cs = iif->ctr.driverdata;
1087 struct gigaset_capi_appl *ap, *tmp;
1088 unsigned ch;
1089
1090 gig_dbg(DEBUG_CMD, "%s [%u]", __func__, appl);
1091
1092 list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
1093 if (ap->id == appl) {
1094 /* remove from any channels */
1095 for (ch = 0; ch < cs->channels; ch++)
1096 remove_appl_from_channel(&cs->bcs[ch], ap);
1097
1098 /* remove from registration list */
1099 list_del(&ap->ctrlist);
1100 kfree(ap);
1101 dev_info(cs->dev, "application %u released\n", appl);
1102 }
1103 }
1104
1105 /*
1106 * =====================================================================
1107 * outgoing CAPI message handler
1108 * =====================================================================
1109 */
1110
1111 /*
1112 * helper function: emit reply message with given Info value
1113 */
send_conf(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb,u16 info)1114 static void send_conf(struct gigaset_capi_ctr *iif,
1115 struct gigaset_capi_appl *ap,
1116 struct sk_buff *skb,
1117 u16 info)
1118 {
1119 struct cardstate *cs = iif->ctr.driverdata;
1120
1121 /*
1122 * _CONF replies always only have NCCI and Info parameters
1123 * so they'll fit into the _REQ message skb
1124 */
1125 capi_cmsg_answer(&iif->acmsg);
1126 iif->acmsg.Info = info;
1127 if (capi_cmsg2message(&iif->acmsg, skb->data)) {
1128 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1129 dev_kfree_skb_any(skb);
1130 return;
1131 }
1132 __skb_trim(skb, CAPI_STDCONF_LEN);
1133 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1134 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1135 }
1136
1137 /*
1138 * process FACILITY_REQ message
1139 */
do_facility_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1140 static void do_facility_req(struct gigaset_capi_ctr *iif,
1141 struct gigaset_capi_appl *ap,
1142 struct sk_buff *skb)
1143 {
1144 struct cardstate *cs = iif->ctr.driverdata;
1145 _cmsg *cmsg = &iif->acmsg;
1146 struct sk_buff *cskb;
1147 u8 *pparam;
1148 unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
1149 u16 function, info;
1150 static u8 confparam[10]; /* max. 9 octets + length byte */
1151
1152 /* decode message */
1153 if (capi_message2cmsg(cmsg, skb->data)) {
1154 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1155 dev_kfree_skb_any(skb);
1156 return;
1157 }
1158 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1159
1160 /*
1161 * Facility Request Parameter is not decoded by capi_message2cmsg()
1162 * encoding depends on Facility Selector
1163 */
1164 switch (cmsg->FacilitySelector) {
1165 case CAPI_FACILITY_DTMF: /* ToDo */
1166 info = CapiFacilityNotSupported;
1167 confparam[0] = 2; /* length */
1168 /* DTMF information: Unknown DTMF request */
1169 capimsg_setu16(confparam, 1, 2);
1170 break;
1171
1172 case CAPI_FACILITY_V42BIS: /* not supported */
1173 info = CapiFacilityNotSupported;
1174 confparam[0] = 2; /* length */
1175 /* V.42 bis information: not available */
1176 capimsg_setu16(confparam, 1, 1);
1177 break;
1178
1179 case CAPI_FACILITY_SUPPSVC:
1180 /* decode Function parameter */
1181 pparam = cmsg->FacilityRequestParameter;
1182 if (pparam == NULL || pparam[0] < 2) {
1183 dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
1184 "Facility Request Parameter");
1185 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1186 return;
1187 }
1188 function = CAPIMSG_U16(pparam, 1);
1189 switch (function) {
1190 case CAPI_SUPPSVC_GETSUPPORTED:
1191 info = CapiSuccess;
1192 /* Supplementary Service specific parameter */
1193 confparam[3] = 6; /* length */
1194 /* Supplementary services info: Success */
1195 capimsg_setu16(confparam, 4, CapiSuccess);
1196 /* Supported Services: none */
1197 capimsg_setu32(confparam, 6, 0);
1198 break;
1199 case CAPI_SUPPSVC_LISTEN:
1200 if (pparam[0] < 7 || pparam[3] < 4) {
1201 dev_notice(cs->dev, "%s: %s missing\n",
1202 "FACILITY_REQ", "Notification Mask");
1203 send_conf(iif, ap, skb,
1204 CapiIllMessageParmCoding);
1205 return;
1206 }
1207 if (CAPIMSG_U32(pparam, 4) != 0) {
1208 dev_notice(cs->dev,
1209 "%s: unsupported supplementary service notification mask 0x%x\n",
1210 "FACILITY_REQ", CAPIMSG_U32(pparam, 4));
1211 info = CapiFacilitySpecificFunctionNotSupported;
1212 confparam[3] = 2; /* length */
1213 capimsg_setu16(confparam, 4,
1214 CapiSupplementaryServiceNotSupported);
1215 break;
1216 }
1217 info = CapiSuccess;
1218 confparam[3] = 2; /* length */
1219 capimsg_setu16(confparam, 4, CapiSuccess);
1220 break;
1221
1222 /* ToDo: add supported services */
1223
1224 default:
1225 dev_notice(cs->dev,
1226 "%s: unsupported supplementary service function 0x%04x\n",
1227 "FACILITY_REQ", function);
1228 info = CapiFacilitySpecificFunctionNotSupported;
1229 /* Supplementary Service specific parameter */
1230 confparam[3] = 2; /* length */
1231 /* Supplementary services info: not supported */
1232 capimsg_setu16(confparam, 4,
1233 CapiSupplementaryServiceNotSupported);
1234 }
1235
1236 /* Facility confirmation parameter */
1237 confparam[0] = confparam[3] + 3; /* total length */
1238 /* Function: copy from _REQ message */
1239 capimsg_setu16(confparam, 1, function);
1240 /* Supplementary Service specific parameter already set above */
1241 break;
1242
1243 case CAPI_FACILITY_WAKEUP: /* ToDo */
1244 info = CapiFacilityNotSupported;
1245 confparam[0] = 2; /* length */
1246 /* Number of accepted awake request parameters: 0 */
1247 capimsg_setu16(confparam, 1, 0);
1248 break;
1249
1250 default:
1251 info = CapiFacilityNotSupported;
1252 confparam[0] = 0; /* empty struct */
1253 }
1254
1255 /* send FACILITY_CONF with given Info and confirmation parameter */
1256 dev_kfree_skb_any(skb);
1257 capi_cmsg_answer(cmsg);
1258 cmsg->Info = info;
1259 cmsg->FacilityConfirmationParameter = confparam;
1260 msgsize += confparam[0]; /* length */
1261 cskb = alloc_skb(msgsize, GFP_ATOMIC);
1262 if (!cskb) {
1263 dev_err(cs->dev, "%s: out of memory\n", __func__);
1264 return;
1265 }
1266 if (capi_cmsg2message(cmsg, __skb_put(cskb, msgsize))) {
1267 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1268 dev_kfree_skb_any(cskb);
1269 return;
1270 }
1271 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1272 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
1273 }
1274
1275
1276 /*
1277 * process LISTEN_REQ message
1278 * just store the masks in the application data structure
1279 */
do_listen_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1280 static void do_listen_req(struct gigaset_capi_ctr *iif,
1281 struct gigaset_capi_appl *ap,
1282 struct sk_buff *skb)
1283 {
1284 struct cardstate *cs = iif->ctr.driverdata;
1285
1286 /* decode message */
1287 if (capi_message2cmsg(&iif->acmsg, skb->data)) {
1288 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1289 dev_kfree_skb_any(skb);
1290 return;
1291 }
1292 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1293
1294 /* store listening parameters */
1295 ap->listenInfoMask = iif->acmsg.InfoMask;
1296 ap->listenCIPmask = iif->acmsg.CIPmask;
1297 send_conf(iif, ap, skb, CapiSuccess);
1298 }
1299
1300 /*
1301 * process ALERT_REQ message
1302 * nothing to do, Gigaset always alerts anyway
1303 */
do_alert_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1304 static void do_alert_req(struct gigaset_capi_ctr *iif,
1305 struct gigaset_capi_appl *ap,
1306 struct sk_buff *skb)
1307 {
1308 struct cardstate *cs = iif->ctr.driverdata;
1309
1310 /* decode message */
1311 if (capi_message2cmsg(&iif->acmsg, skb->data)) {
1312 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1313 dev_kfree_skb_any(skb);
1314 return;
1315 }
1316 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1317 send_conf(iif, ap, skb, CapiAlertAlreadySent);
1318 }
1319
1320 /*
1321 * process CONNECT_REQ message
1322 * allocate a B channel, prepare dial commands, queue a DIAL event,
1323 * emit CONNECT_CONF reply
1324 */
do_connect_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1325 static void do_connect_req(struct gigaset_capi_ctr *iif,
1326 struct gigaset_capi_appl *ap,
1327 struct sk_buff *skb)
1328 {
1329 struct cardstate *cs = iif->ctr.driverdata;
1330 _cmsg *cmsg = &iif->acmsg;
1331 struct bc_state *bcs;
1332 char **commands;
1333 char *s;
1334 u8 *pp;
1335 unsigned long flags;
1336 int i, l, lbc, lhlc;
1337 u16 info;
1338
1339 /* decode message */
1340 if (capi_message2cmsg(cmsg, skb->data)) {
1341 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1342 dev_kfree_skb_any(skb);
1343 return;
1344 }
1345 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1346
1347 /* get free B channel & construct PLCI */
1348 bcs = gigaset_get_free_channel(cs);
1349 if (!bcs) {
1350 dev_notice(cs->dev, "%s: no B channel available\n",
1351 "CONNECT_REQ");
1352 send_conf(iif, ap, skb, CapiNoPlciAvailable);
1353 return;
1354 }
1355 spin_lock_irqsave(&bcs->aplock, flags);
1356 if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE)
1357 dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
1358 __func__, bcs->ap, bcs->apconnstate);
1359 ap->bcnext = NULL;
1360 bcs->ap = ap;
1361 bcs->apconnstate = APCONN_SETUP;
1362 spin_unlock_irqrestore(&bcs->aplock, flags);
1363
1364 bcs->rx_bufsize = ap->rp.datablklen;
1365 dev_kfree_skb(bcs->rx_skb);
1366 gigaset_new_rx_skb(bcs);
1367 cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
1368
1369 /* build command table */
1370 commands = kcalloc(AT_NUM, sizeof(*commands), GFP_KERNEL);
1371 if (!commands)
1372 goto oom;
1373
1374 /* encode parameter: Called party number */
1375 pp = cmsg->CalledPartyNumber;
1376 if (pp == NULL || *pp == 0) {
1377 dev_notice(cs->dev, "%s: %s missing\n",
1378 "CONNECT_REQ", "Called party number");
1379 info = CapiIllMessageParmCoding;
1380 goto error;
1381 }
1382 l = *pp++;
1383 /* check type of number/numbering plan byte */
1384 switch (*pp) {
1385 case 0x80: /* unknown type / unknown numbering plan */
1386 case 0x81: /* unknown type / ISDN/Telephony numbering plan */
1387 break;
1388 default: /* others: warn about potential misinterpretation */
1389 dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
1390 "CONNECT_REQ", "Called party number", *pp);
1391 }
1392 pp++;
1393 l--;
1394 /* translate "**" internal call prefix to CTP value */
1395 if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
1396 s = "^SCTP=0\r";
1397 pp += 2;
1398 l -= 2;
1399 } else {
1400 s = "^SCTP=1\r";
1401 }
1402 commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
1403 if (!commands[AT_TYPE])
1404 goto oom;
1405 commands[AT_DIAL] = kmalloc(l + 3, GFP_KERNEL);
1406 if (!commands[AT_DIAL])
1407 goto oom;
1408 snprintf(commands[AT_DIAL], l + 3, "D%.*s\r", l, pp);
1409
1410 /* encode parameter: Calling party number */
1411 pp = cmsg->CallingPartyNumber;
1412 if (pp != NULL && *pp > 0) {
1413 l = *pp++;
1414
1415 /* check type of number/numbering plan byte */
1416 /* ToDo: allow for/handle Ext=1? */
1417 switch (*pp) {
1418 case 0x00: /* unknown type / unknown numbering plan */
1419 case 0x01: /* unknown type / ISDN/Telephony num. plan */
1420 break;
1421 default:
1422 dev_notice(cs->dev,
1423 "%s: %s type/plan 0x%02x unsupported\n",
1424 "CONNECT_REQ", "Calling party number", *pp);
1425 }
1426 pp++;
1427 l--;
1428
1429 /* check presentation indicator */
1430 if (!l) {
1431 dev_notice(cs->dev, "%s: %s IE truncated\n",
1432 "CONNECT_REQ", "Calling party number");
1433 info = CapiIllMessageParmCoding;
1434 goto error;
1435 }
1436 switch (*pp & 0xfc) { /* ignore Screening indicator */
1437 case 0x80: /* Presentation allowed */
1438 s = "^SCLIP=1\r";
1439 break;
1440 case 0xa0: /* Presentation restricted */
1441 s = "^SCLIP=0\r";
1442 break;
1443 default:
1444 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1445 "CONNECT_REQ",
1446 "Presentation/Screening indicator",
1447 *pp);
1448 s = "^SCLIP=1\r";
1449 }
1450 commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
1451 if (!commands[AT_CLIP])
1452 goto oom;
1453 pp++;
1454 l--;
1455
1456 if (l) {
1457 /* number */
1458 commands[AT_MSN] = kmalloc(l + 8, GFP_KERNEL);
1459 if (!commands[AT_MSN])
1460 goto oom;
1461 snprintf(commands[AT_MSN], l + 8, "^SMSN=%*s\r", l, pp);
1462 }
1463 }
1464
1465 /* check parameter: CIP Value */
1466 if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
1467 (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
1468 dev_notice(cs->dev, "%s: unknown CIP value %d\n",
1469 "CONNECT_REQ", cmsg->CIPValue);
1470 info = CapiCipValueUnknown;
1471 goto error;
1472 }
1473
1474 /*
1475 * check/encode parameters: BC & HLC
1476 * must be encoded together as device doesn't accept HLC separately
1477 * explicit parameters override values derived from CIP
1478 */
1479
1480 /* determine lengths */
1481 if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
1482 lbc = 2 * cmsg->BC[0];
1483 else if (cip2bchlc[cmsg->CIPValue].bc) /* BC derived from CIP */
1484 lbc = strlen(cip2bchlc[cmsg->CIPValue].bc);
1485 else /* no BC */
1486 lbc = 0;
1487 if (cmsg->HLC && cmsg->HLC[0]) /* HLC specified explicitly */
1488 lhlc = 2 * cmsg->HLC[0];
1489 else if (cip2bchlc[cmsg->CIPValue].hlc) /* HLC derived from CIP */
1490 lhlc = strlen(cip2bchlc[cmsg->CIPValue].hlc);
1491 else /* no HLC */
1492 lhlc = 0;
1493
1494 if (lbc) {
1495 /* have BC: allocate and assemble command string */
1496 l = lbc + 7; /* "^SBC=" + value + "\r" + null byte */
1497 if (lhlc)
1498 l += lhlc + 7; /* ";^SHLC=" + value */
1499 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1500 if (!commands[AT_BC])
1501 goto oom;
1502 strcpy(commands[AT_BC], "^SBC=");
1503 if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
1504 decode_ie(cmsg->BC, commands[AT_BC] + 5);
1505 else /* BC derived from CIP */
1506 strcpy(commands[AT_BC] + 5,
1507 cip2bchlc[cmsg->CIPValue].bc);
1508 if (lhlc) {
1509 strcpy(commands[AT_BC] + lbc + 5, ";^SHLC=");
1510 if (cmsg->HLC && cmsg->HLC[0])
1511 /* HLC specified explicitly */
1512 decode_ie(cmsg->HLC,
1513 commands[AT_BC] + lbc + 12);
1514 else /* HLC derived from CIP */
1515 strcpy(commands[AT_BC] + lbc + 12,
1516 cip2bchlc[cmsg->CIPValue].hlc);
1517 }
1518 strcpy(commands[AT_BC] + l - 2, "\r");
1519 } else {
1520 /* no BC */
1521 if (lhlc) {
1522 dev_notice(cs->dev, "%s: cannot set HLC without BC\n",
1523 "CONNECT_REQ");
1524 info = CapiIllMessageParmCoding; /* ? */
1525 goto error;
1526 }
1527 }
1528
1529 /* check/encode parameter: B Protocol */
1530 if (cmsg->BProtocol == CAPI_DEFAULT) {
1531 bcs->proto2 = L2_HDLC;
1532 dev_warn(cs->dev,
1533 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1534 } else {
1535 switch (cmsg->B1protocol) {
1536 case 0:
1537 bcs->proto2 = L2_HDLC;
1538 break;
1539 case 1:
1540 bcs->proto2 = L2_VOICE;
1541 break;
1542 default:
1543 dev_warn(cs->dev,
1544 "B1 Protocol %u unsupported, using Transparent\n",
1545 cmsg->B1protocol);
1546 bcs->proto2 = L2_VOICE;
1547 }
1548 if (cmsg->B2protocol != 1)
1549 dev_warn(cs->dev,
1550 "B2 Protocol %u unsupported, using Transparent\n",
1551 cmsg->B2protocol);
1552 if (cmsg->B3protocol != 0)
1553 dev_warn(cs->dev,
1554 "B3 Protocol %u unsupported, using Transparent\n",
1555 cmsg->B3protocol);
1556 ignore_cstruct_param(cs, cmsg->B1configuration,
1557 "CONNECT_REQ", "B1 Configuration");
1558 ignore_cstruct_param(cs, cmsg->B2configuration,
1559 "CONNECT_REQ", "B2 Configuration");
1560 ignore_cstruct_param(cs, cmsg->B3configuration,
1561 "CONNECT_REQ", "B3 Configuration");
1562 }
1563 commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
1564 if (!commands[AT_PROTO])
1565 goto oom;
1566 snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
1567
1568 /* ToDo: check/encode remaining parameters */
1569 ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
1570 "CONNECT_REQ", "Called pty subaddr");
1571 ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
1572 "CONNECT_REQ", "Calling pty subaddr");
1573 ignore_cstruct_param(cs, cmsg->LLC,
1574 "CONNECT_REQ", "LLC");
1575 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1576 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1577 "CONNECT_REQ", "B Channel Information");
1578 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1579 "CONNECT_REQ", "Keypad Facility");
1580 ignore_cstruct_param(cs, cmsg->Useruserdata,
1581 "CONNECT_REQ", "User-User Data");
1582 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1583 "CONNECT_REQ", "Facility Data Array");
1584 }
1585
1586 /* encode parameter: B channel to use */
1587 commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
1588 if (!commands[AT_ISO])
1589 goto oom;
1590 snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
1591 (unsigned) bcs->channel + 1);
1592
1593 /* queue & schedule EV_DIAL event */
1594 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
1595 bcs->at_state.seq_index, NULL)) {
1596 info = CAPI_MSGOSRESOURCEERR;
1597 goto error;
1598 }
1599 gigaset_schedule_event(cs);
1600 send_conf(iif, ap, skb, CapiSuccess);
1601 return;
1602
1603 oom:
1604 dev_err(cs->dev, "%s: out of memory\n", __func__);
1605 info = CAPI_MSGOSRESOURCEERR;
1606 error:
1607 if (commands)
1608 for (i = 0; i < AT_NUM; i++)
1609 kfree(commands[i]);
1610 kfree(commands);
1611 gigaset_free_channel(bcs);
1612 send_conf(iif, ap, skb, info);
1613 }
1614
1615 /*
1616 * process CONNECT_RESP message
1617 * checks protocol parameters and queues an ACCEPT or HUP event
1618 */
do_connect_resp(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1619 static void do_connect_resp(struct gigaset_capi_ctr *iif,
1620 struct gigaset_capi_appl *ap,
1621 struct sk_buff *skb)
1622 {
1623 struct cardstate *cs = iif->ctr.driverdata;
1624 _cmsg *cmsg = &iif->acmsg;
1625 struct bc_state *bcs;
1626 struct gigaset_capi_appl *oap;
1627 unsigned long flags;
1628 int channel;
1629
1630 /* decode message */
1631 if (capi_message2cmsg(cmsg, skb->data)) {
1632 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1633 dev_kfree_skb_any(skb);
1634 return;
1635 }
1636 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1637 dev_kfree_skb_any(skb);
1638
1639 /* extract and check channel number from PLCI */
1640 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1641 if (!channel || channel > cs->channels) {
1642 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1643 "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
1644 return;
1645 }
1646 bcs = cs->bcs + channel - 1;
1647
1648 switch (cmsg->Reject) {
1649 case 0: /* Accept */
1650 /* drop all competing applications, keep only this one */
1651 spin_lock_irqsave(&bcs->aplock, flags);
1652 while (bcs->ap != NULL) {
1653 oap = bcs->ap;
1654 bcs->ap = oap->bcnext;
1655 if (oap != ap) {
1656 spin_unlock_irqrestore(&bcs->aplock, flags);
1657 send_disconnect_ind(bcs, oap,
1658 CapiCallGivenToOtherApplication);
1659 spin_lock_irqsave(&bcs->aplock, flags);
1660 }
1661 }
1662 ap->bcnext = NULL;
1663 bcs->ap = ap;
1664 spin_unlock_irqrestore(&bcs->aplock, flags);
1665
1666 bcs->rx_bufsize = ap->rp.datablklen;
1667 dev_kfree_skb(bcs->rx_skb);
1668 gigaset_new_rx_skb(bcs);
1669 bcs->chstate |= CHS_NOTIFY_LL;
1670
1671 /* check/encode B channel protocol */
1672 if (cmsg->BProtocol == CAPI_DEFAULT) {
1673 bcs->proto2 = L2_HDLC;
1674 dev_warn(cs->dev,
1675 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1676 } else {
1677 switch (cmsg->B1protocol) {
1678 case 0:
1679 bcs->proto2 = L2_HDLC;
1680 break;
1681 case 1:
1682 bcs->proto2 = L2_VOICE;
1683 break;
1684 default:
1685 dev_warn(cs->dev,
1686 "B1 Protocol %u unsupported, using Transparent\n",
1687 cmsg->B1protocol);
1688 bcs->proto2 = L2_VOICE;
1689 }
1690 if (cmsg->B2protocol != 1)
1691 dev_warn(cs->dev,
1692 "B2 Protocol %u unsupported, using Transparent\n",
1693 cmsg->B2protocol);
1694 if (cmsg->B3protocol != 0)
1695 dev_warn(cs->dev,
1696 "B3 Protocol %u unsupported, using Transparent\n",
1697 cmsg->B3protocol);
1698 ignore_cstruct_param(cs, cmsg->B1configuration,
1699 "CONNECT_RESP", "B1 Configuration");
1700 ignore_cstruct_param(cs, cmsg->B2configuration,
1701 "CONNECT_RESP", "B2 Configuration");
1702 ignore_cstruct_param(cs, cmsg->B3configuration,
1703 "CONNECT_RESP", "B3 Configuration");
1704 }
1705
1706 /* ToDo: check/encode remaining parameters */
1707 ignore_cstruct_param(cs, cmsg->ConnectedNumber,
1708 "CONNECT_RESP", "Connected Number");
1709 ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
1710 "CONNECT_RESP", "Connected Subaddress");
1711 ignore_cstruct_param(cs, cmsg->LLC,
1712 "CONNECT_RESP", "LLC");
1713 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1714 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1715 "CONNECT_RESP", "BChannel Information");
1716 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1717 "CONNECT_RESP", "Keypad Facility");
1718 ignore_cstruct_param(cs, cmsg->Useruserdata,
1719 "CONNECT_RESP", "User-User Data");
1720 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1721 "CONNECT_RESP", "Facility Data Array");
1722 }
1723
1724 /* Accept call */
1725 if (!gigaset_add_event(cs, &cs->bcs[channel - 1].at_state,
1726 EV_ACCEPT, NULL, 0, NULL))
1727 return;
1728 gigaset_schedule_event(cs);
1729 return;
1730
1731 case 1: /* Ignore */
1732 /* send DISCONNECT_IND to this application */
1733 send_disconnect_ind(bcs, ap, 0);
1734
1735 /* remove it from the list of listening apps */
1736 spin_lock_irqsave(&bcs->aplock, flags);
1737 if (bcs->ap == ap) {
1738 bcs->ap = ap->bcnext;
1739 if (bcs->ap == NULL) {
1740 /* last one: stop ev-layer hupD notifications */
1741 bcs->apconnstate = APCONN_NONE;
1742 bcs->chstate &= ~CHS_NOTIFY_LL;
1743 }
1744 spin_unlock_irqrestore(&bcs->aplock, flags);
1745 return;
1746 }
1747 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
1748 if (oap->bcnext == ap) {
1749 oap->bcnext = oap->bcnext->bcnext;
1750 spin_unlock_irqrestore(&bcs->aplock, flags);
1751 return;
1752 }
1753 }
1754 spin_unlock_irqrestore(&bcs->aplock, flags);
1755 dev_err(cs->dev, "%s: application %u not found\n",
1756 __func__, ap->id);
1757 return;
1758
1759 default: /* Reject */
1760 /* drop all competing applications, keep only this one */
1761 spin_lock_irqsave(&bcs->aplock, flags);
1762 while (bcs->ap != NULL) {
1763 oap = bcs->ap;
1764 bcs->ap = oap->bcnext;
1765 if (oap != ap) {
1766 spin_unlock_irqrestore(&bcs->aplock, flags);
1767 send_disconnect_ind(bcs, oap,
1768 CapiCallGivenToOtherApplication);
1769 spin_lock_irqsave(&bcs->aplock, flags);
1770 }
1771 }
1772 ap->bcnext = NULL;
1773 bcs->ap = ap;
1774 spin_unlock_irqrestore(&bcs->aplock, flags);
1775
1776 /* reject call - will trigger DISCONNECT_IND for this app */
1777 dev_info(cs->dev, "%s: Reject=%x\n",
1778 "CONNECT_RESP", cmsg->Reject);
1779 if (!gigaset_add_event(cs, &cs->bcs[channel - 1].at_state,
1780 EV_HUP, NULL, 0, NULL))
1781 return;
1782 gigaset_schedule_event(cs);
1783 return;
1784 }
1785 }
1786
1787 /*
1788 * process CONNECT_B3_REQ message
1789 * build NCCI and emit CONNECT_B3_CONF reply
1790 */
do_connect_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1791 static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
1792 struct gigaset_capi_appl *ap,
1793 struct sk_buff *skb)
1794 {
1795 struct cardstate *cs = iif->ctr.driverdata;
1796 _cmsg *cmsg = &iif->acmsg;
1797 struct bc_state *bcs;
1798 int channel;
1799
1800 /* decode message */
1801 if (capi_message2cmsg(cmsg, skb->data)) {
1802 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1803 dev_kfree_skb_any(skb);
1804 return;
1805 }
1806 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1807
1808 /* extract and check channel number from PLCI */
1809 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1810 if (!channel || channel > cs->channels) {
1811 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1812 "CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
1813 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1814 return;
1815 }
1816 bcs = &cs->bcs[channel - 1];
1817
1818 /* mark logical connection active */
1819 bcs->apconnstate = APCONN_ACTIVE;
1820
1821 /* build NCCI: always 1 (one B3 connection only) */
1822 cmsg->adr.adrNCCI |= 1 << 16;
1823
1824 /* NCPI parameter: not applicable for B3 Transparent */
1825 ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
1826 send_conf(iif, ap, skb,
1827 (cmsg->NCPI && cmsg->NCPI[0]) ?
1828 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1829 }
1830
1831 /*
1832 * process CONNECT_B3_RESP message
1833 * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
1834 * or queue EV_HUP and emit DISCONNECT_B3_IND.
1835 * The emitted message is always shorter than the received one,
1836 * allowing to reuse the skb.
1837 */
do_connect_b3_resp(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1838 static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
1839 struct gigaset_capi_appl *ap,
1840 struct sk_buff *skb)
1841 {
1842 struct cardstate *cs = iif->ctr.driverdata;
1843 _cmsg *cmsg = &iif->acmsg;
1844 struct bc_state *bcs;
1845 int channel;
1846 unsigned int msgsize;
1847 u8 command;
1848
1849 /* decode message */
1850 if (capi_message2cmsg(cmsg, skb->data)) {
1851 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1852 dev_kfree_skb_any(skb);
1853 return;
1854 }
1855 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1856
1857 /* extract and check channel number and NCCI */
1858 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1859 if (!channel || channel > cs->channels ||
1860 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1861 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1862 "CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
1863 dev_kfree_skb_any(skb);
1864 return;
1865 }
1866 bcs = &cs->bcs[channel - 1];
1867
1868 if (cmsg->Reject) {
1869 /* Reject: clear B3 connect received flag */
1870 bcs->apconnstate = APCONN_SETUP;
1871
1872 /* trigger hangup, causing eventual DISCONNECT_IND */
1873 if (!gigaset_add_event(cs, &bcs->at_state,
1874 EV_HUP, NULL, 0, NULL)) {
1875 dev_kfree_skb_any(skb);
1876 return;
1877 }
1878 gigaset_schedule_event(cs);
1879
1880 /* emit DISCONNECT_B3_IND */
1881 command = CAPI_DISCONNECT_B3;
1882 msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
1883 } else {
1884 /*
1885 * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
1886 * we only send CONNECT_B3_IND if the B channel is up
1887 */
1888 command = CAPI_CONNECT_B3_ACTIVE;
1889 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
1890 }
1891 capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
1892 ap->nextMessageNumber++, cmsg->adr.adrNCCI);
1893 __skb_trim(skb, msgsize);
1894 if (capi_cmsg2message(cmsg, skb->data)) {
1895 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1896 dev_kfree_skb_any(skb);
1897 return;
1898 }
1899 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1900 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1901 }
1902
1903 /*
1904 * process DISCONNECT_REQ message
1905 * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
1906 * emit DISCONNECT_CONF reply
1907 */
do_disconnect_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1908 static void do_disconnect_req(struct gigaset_capi_ctr *iif,
1909 struct gigaset_capi_appl *ap,
1910 struct sk_buff *skb)
1911 {
1912 struct cardstate *cs = iif->ctr.driverdata;
1913 _cmsg *cmsg = &iif->acmsg;
1914 struct bc_state *bcs;
1915 _cmsg *b3cmsg;
1916 struct sk_buff *b3skb;
1917 int channel;
1918
1919 /* decode message */
1920 if (capi_message2cmsg(cmsg, skb->data)) {
1921 dev_err(cs->dev, "%s: message parser failure\n", __func__);
1922 dev_kfree_skb_any(skb);
1923 return;
1924 }
1925 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1926
1927 /* extract and check channel number from PLCI */
1928 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1929 if (!channel || channel > cs->channels) {
1930 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1931 "DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
1932 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1933 return;
1934 }
1935 bcs = cs->bcs + channel - 1;
1936
1937 /* ToDo: process parameter: Additional info */
1938 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1939 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1940 "DISCONNECT_REQ", "B Channel Information");
1941 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1942 "DISCONNECT_REQ", "Keypad Facility");
1943 ignore_cstruct_param(cs, cmsg->Useruserdata,
1944 "DISCONNECT_REQ", "User-User Data");
1945 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1946 "DISCONNECT_REQ", "Facility Data Array");
1947 }
1948
1949 /* skip if DISCONNECT_IND already sent */
1950 if (!bcs->apconnstate)
1951 return;
1952
1953 /* check for active logical connection */
1954 if (bcs->apconnstate >= APCONN_ACTIVE) {
1955 /* clear it */
1956 bcs->apconnstate = APCONN_SETUP;
1957
1958 /*
1959 * emit DISCONNECT_B3_IND with cause 0x3301
1960 * use separate cmsg structure, as the content of iif->acmsg
1961 * is still needed for creating the _CONF message
1962 */
1963 b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
1964 if (!b3cmsg) {
1965 dev_err(cs->dev, "%s: out of memory\n", __func__);
1966 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1967 return;
1968 }
1969 capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
1970 ap->nextMessageNumber++,
1971 cmsg->adr.adrPLCI | (1 << 16));
1972 b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
1973 b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
1974 if (b3skb == NULL) {
1975 dev_err(cs->dev, "%s: out of memory\n", __func__);
1976 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1977 kfree(b3cmsg);
1978 return;
1979 }
1980 if (capi_cmsg2message(b3cmsg,
1981 __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN))) {
1982 dev_err(cs->dev, "%s: message parser failure\n",
1983 __func__);
1984 kfree(b3cmsg);
1985 dev_kfree_skb_any(b3skb);
1986 return;
1987 }
1988 dump_cmsg(DEBUG_CMD, __func__, b3cmsg);
1989 kfree(b3cmsg);
1990 capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
1991 }
1992
1993 /* trigger hangup, causing eventual DISCONNECT_IND */
1994 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1995 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1996 return;
1997 }
1998 gigaset_schedule_event(cs);
1999
2000 /* emit reply */
2001 send_conf(iif, ap, skb, CapiSuccess);
2002 }
2003
2004 /*
2005 * process DISCONNECT_B3_REQ message
2006 * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
2007 */
do_disconnect_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2008 static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
2009 struct gigaset_capi_appl *ap,
2010 struct sk_buff *skb)
2011 {
2012 struct cardstate *cs = iif->ctr.driverdata;
2013 _cmsg *cmsg = &iif->acmsg;
2014 struct bc_state *bcs;
2015 int channel;
2016
2017 /* decode message */
2018 if (capi_message2cmsg(cmsg, skb->data)) {
2019 dev_err(cs->dev, "%s: message parser failure\n", __func__);
2020 dev_kfree_skb_any(skb);
2021 return;
2022 }
2023 dump_cmsg(DEBUG_CMD, __func__, cmsg);
2024
2025 /* extract and check channel number and NCCI */
2026 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
2027 if (!channel || channel > cs->channels ||
2028 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
2029 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
2030 "DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
2031 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
2032 return;
2033 }
2034 bcs = &cs->bcs[channel - 1];
2035
2036 /* reject if logical connection not active */
2037 if (bcs->apconnstate < APCONN_ACTIVE) {
2038 send_conf(iif, ap, skb,
2039 CapiMessageNotSupportedInCurrentState);
2040 return;
2041 }
2042
2043 /* trigger hangup, causing eventual DISCONNECT_B3_IND */
2044 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
2045 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
2046 return;
2047 }
2048 gigaset_schedule_event(cs);
2049
2050 /* NCPI parameter: not applicable for B3 Transparent */
2051 ignore_cstruct_param(cs, cmsg->NCPI,
2052 "DISCONNECT_B3_REQ", "NCPI");
2053 send_conf(iif, ap, skb,
2054 (cmsg->NCPI && cmsg->NCPI[0]) ?
2055 CapiNcpiNotSupportedByProtocol : CapiSuccess);
2056 }
2057
2058 /*
2059 * process DATA_B3_REQ message
2060 */
do_data_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2061 static void do_data_b3_req(struct gigaset_capi_ctr *iif,
2062 struct gigaset_capi_appl *ap,
2063 struct sk_buff *skb)
2064 {
2065 struct cardstate *cs = iif->ctr.driverdata;
2066 struct bc_state *bcs;
2067 int channel = CAPIMSG_PLCI_PART(skb->data);
2068 u16 ncci = CAPIMSG_NCCI_PART(skb->data);
2069 u16 msglen = CAPIMSG_LEN(skb->data);
2070 u16 datalen = CAPIMSG_DATALEN(skb->data);
2071 u16 flags = CAPIMSG_FLAGS(skb->data);
2072 u16 msgid = CAPIMSG_MSGID(skb->data);
2073 u16 handle = CAPIMSG_HANDLE_REQ(skb->data);
2074
2075 /* frequent message, avoid _cmsg overhead */
2076 dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
2077
2078 /* check parameters */
2079 if (channel == 0 || channel > cs->channels || ncci != 1) {
2080 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
2081 "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
2082 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
2083 return;
2084 }
2085 bcs = &cs->bcs[channel - 1];
2086 if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
2087 dev_notice(cs->dev, "%s: unexpected length %d\n",
2088 "DATA_B3_REQ", msglen);
2089 if (msglen + datalen != skb->len)
2090 dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
2091 "DATA_B3_REQ", msglen, datalen, skb->len);
2092 if (msglen + datalen > skb->len) {
2093 /* message too short for announced data length */
2094 send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
2095 return;
2096 }
2097 if (flags & CAPI_FLAGS_RESERVED) {
2098 dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
2099 "DATA_B3_REQ", flags);
2100 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
2101 return;
2102 }
2103
2104 /* reject if logical connection not active */
2105 if (bcs->apconnstate < APCONN_ACTIVE) {
2106 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
2107 return;
2108 }
2109
2110 /* pull CAPI message into link layer header */
2111 skb_reset_mac_header(skb);
2112 skb->mac_len = msglen;
2113 skb_pull(skb, msglen);
2114
2115 /* pass to device-specific module */
2116 if (cs->ops->send_skb(bcs, skb) < 0) {
2117 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
2118 return;
2119 }
2120
2121 /*
2122 * DATA_B3_CONF will be sent by gigaset_skb_sent() only if "delivery
2123 * confirmation" bit is set; otherwise we have to send it now
2124 */
2125 if (!(flags & CAPI_FLAGS_DELIVERY_CONFIRMATION))
2126 send_data_b3_conf(cs, &iif->ctr, ap->id, msgid, channel, handle,
2127 flags ? CapiFlagsNotSupportedByProtocol
2128 : CAPI_NOERROR);
2129 }
2130
2131 /*
2132 * process RESET_B3_REQ message
2133 * just always reply "not supported by current protocol"
2134 */
do_reset_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2135 static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
2136 struct gigaset_capi_appl *ap,
2137 struct sk_buff *skb)
2138 {
2139 struct cardstate *cs = iif->ctr.driverdata;
2140
2141 /* decode message */
2142 if (capi_message2cmsg(&iif->acmsg, skb->data)) {
2143 dev_err(cs->dev, "%s: message parser failure\n", __func__);
2144 dev_kfree_skb_any(skb);
2145 return;
2146 }
2147 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
2148 send_conf(iif, ap, skb,
2149 CapiResetProcedureNotSupportedByCurrentProtocol);
2150 }
2151
2152 /*
2153 * unsupported CAPI message handler
2154 */
do_unsupported(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2155 static void do_unsupported(struct gigaset_capi_ctr *iif,
2156 struct gigaset_capi_appl *ap,
2157 struct sk_buff *skb)
2158 {
2159 struct cardstate *cs = iif->ctr.driverdata;
2160
2161 /* decode message */
2162 if (capi_message2cmsg(&iif->acmsg, skb->data)) {
2163 dev_err(cs->dev, "%s: message parser failure\n", __func__);
2164 dev_kfree_skb_any(skb);
2165 return;
2166 }
2167 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
2168 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
2169 }
2170
2171 /*
2172 * CAPI message handler: no-op
2173 */
do_nothing(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2174 static void do_nothing(struct gigaset_capi_ctr *iif,
2175 struct gigaset_capi_appl *ap,
2176 struct sk_buff *skb)
2177 {
2178 struct cardstate *cs = iif->ctr.driverdata;
2179
2180 /* decode message */
2181 if (capi_message2cmsg(&iif->acmsg, skb->data)) {
2182 dev_err(cs->dev, "%s: message parser failure\n", __func__);
2183 dev_kfree_skb_any(skb);
2184 return;
2185 }
2186 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
2187 dev_kfree_skb_any(skb);
2188 }
2189
do_data_b3_resp(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2190 static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
2191 struct gigaset_capi_appl *ap,
2192 struct sk_buff *skb)
2193 {
2194 dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
2195 dev_kfree_skb_any(skb);
2196 }
2197
2198 /* table of outgoing CAPI message handlers with lookup function */
2199 typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
2200 struct gigaset_capi_appl *,
2201 struct sk_buff *);
2202
2203 static struct {
2204 u16 cmd;
2205 capi_send_handler_t handler;
2206 } capi_send_handler_table[] = {
2207 /* most frequent messages first for faster lookup */
2208 { CAPI_DATA_B3_REQ, do_data_b3_req },
2209 { CAPI_DATA_B3_RESP, do_data_b3_resp },
2210
2211 { CAPI_ALERT_REQ, do_alert_req },
2212 { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
2213 { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
2214 { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
2215 { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
2216 { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
2217 { CAPI_CONNECT_REQ, do_connect_req },
2218 { CAPI_CONNECT_RESP, do_connect_resp },
2219 { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
2220 { CAPI_DISCONNECT_B3_RESP, do_nothing },
2221 { CAPI_DISCONNECT_REQ, do_disconnect_req },
2222 { CAPI_DISCONNECT_RESP, do_nothing },
2223 { CAPI_FACILITY_REQ, do_facility_req },
2224 { CAPI_FACILITY_RESP, do_nothing },
2225 { CAPI_LISTEN_REQ, do_listen_req },
2226 { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
2227 { CAPI_RESET_B3_REQ, do_reset_b3_req },
2228 { CAPI_RESET_B3_RESP, do_nothing },
2229
2230 /*
2231 * ToDo: support overlap sending (requires ev-layer state
2232 * machine extension to generate additional ATD commands)
2233 */
2234 { CAPI_INFO_REQ, do_unsupported },
2235 { CAPI_INFO_RESP, do_nothing },
2236
2237 /*
2238 * ToDo: what's the proper response for these?
2239 */
2240 { CAPI_MANUFACTURER_REQ, do_nothing },
2241 { CAPI_MANUFACTURER_RESP, do_nothing },
2242 };
2243
2244 /* look up handler */
lookup_capi_send_handler(const u16 cmd)2245 static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
2246 {
2247 size_t i;
2248
2249 for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
2250 if (capi_send_handler_table[i].cmd == cmd)
2251 return capi_send_handler_table[i].handler;
2252 return NULL;
2253 }
2254
2255
2256 /**
2257 * gigaset_send_message() - accept a CAPI message from an application
2258 * @ctr: controller descriptor structure.
2259 * @skb: CAPI message.
2260 *
2261 * Return value: CAPI error code
2262 * Note: capidrv (and probably others, too) only uses the return value to
2263 * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
2264 */
gigaset_send_message(struct capi_ctr * ctr,struct sk_buff * skb)2265 static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
2266 {
2267 struct gigaset_capi_ctr *iif
2268 = container_of(ctr, struct gigaset_capi_ctr, ctr);
2269 struct cardstate *cs = ctr->driverdata;
2270 struct gigaset_capi_appl *ap;
2271 capi_send_handler_t handler;
2272
2273 /* can only handle linear sk_buffs */
2274 if (skb_linearize(skb) < 0) {
2275 dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
2276 return CAPI_MSGOSRESOURCEERR;
2277 }
2278
2279 /* retrieve application data structure */
2280 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2281 if (!ap) {
2282 dev_notice(cs->dev, "%s: application %u not registered\n",
2283 __func__, CAPIMSG_APPID(skb->data));
2284 return CAPI_ILLAPPNR;
2285 }
2286
2287 /* look up command */
2288 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2289 if (!handler) {
2290 /* unknown/unsupported message type */
2291 if (printk_ratelimit())
2292 dev_notice(cs->dev, "%s: unsupported message %u\n",
2293 __func__, CAPIMSG_CMD(skb->data));
2294 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
2295 }
2296
2297 /* serialize */
2298 if (atomic_add_return(1, &iif->sendqlen) > 1) {
2299 /* queue behind other messages */
2300 skb_queue_tail(&iif->sendqueue, skb);
2301 return CAPI_NOERROR;
2302 }
2303
2304 /* process message */
2305 handler(iif, ap, skb);
2306
2307 /* process other messages arrived in the meantime */
2308 while (atomic_sub_return(1, &iif->sendqlen) > 0) {
2309 skb = skb_dequeue(&iif->sendqueue);
2310 if (!skb) {
2311 /* should never happen */
2312 dev_err(cs->dev, "%s: send queue empty\n", __func__);
2313 continue;
2314 }
2315 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2316 if (!ap) {
2317 /* could that happen? */
2318 dev_warn(cs->dev, "%s: application %u vanished\n",
2319 __func__, CAPIMSG_APPID(skb->data));
2320 continue;
2321 }
2322 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2323 if (!handler) {
2324 /* should never happen */
2325 dev_err(cs->dev, "%s: handler %x vanished\n",
2326 __func__, CAPIMSG_CMD(skb->data));
2327 continue;
2328 }
2329 handler(iif, ap, skb);
2330 }
2331
2332 return CAPI_NOERROR;
2333 }
2334
2335 /**
2336 * gigaset_procinfo() - build single line description for controller
2337 * @ctr: controller descriptor structure.
2338 *
2339 * Return value: pointer to generated string (null terminated)
2340 */
gigaset_procinfo(struct capi_ctr * ctr)2341 static char *gigaset_procinfo(struct capi_ctr *ctr)
2342 {
2343 return ctr->name; /* ToDo: more? */
2344 }
2345
gigaset_proc_show(struct seq_file * m,void * v)2346 static int gigaset_proc_show(struct seq_file *m, void *v)
2347 {
2348 struct capi_ctr *ctr = m->private;
2349 struct cardstate *cs = ctr->driverdata;
2350 char *s;
2351 int i;
2352
2353 seq_printf(m, "%-16s %s\n", "name", ctr->name);
2354 seq_printf(m, "%-16s %s %s\n", "dev",
2355 dev_driver_string(cs->dev), dev_name(cs->dev));
2356 seq_printf(m, "%-16s %d\n", "id", cs->myid);
2357 if (cs->gotfwver)
2358 seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
2359 cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
2360 seq_printf(m, "%-16s %d\n", "channels", cs->channels);
2361 seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
2362
2363 switch (cs->mode) {
2364 case M_UNKNOWN:
2365 s = "unknown";
2366 break;
2367 case M_CONFIG:
2368 s = "config";
2369 break;
2370 case M_UNIMODEM:
2371 s = "Unimodem";
2372 break;
2373 case M_CID:
2374 s = "CID";
2375 break;
2376 default:
2377 s = "??";
2378 }
2379 seq_printf(m, "%-16s %s\n", "mode", s);
2380
2381 switch (cs->mstate) {
2382 case MS_UNINITIALIZED:
2383 s = "uninitialized";
2384 break;
2385 case MS_INIT:
2386 s = "init";
2387 break;
2388 case MS_LOCKED:
2389 s = "locked";
2390 break;
2391 case MS_SHUTDOWN:
2392 s = "shutdown";
2393 break;
2394 case MS_RECOVER:
2395 s = "recover";
2396 break;
2397 case MS_READY:
2398 s = "ready";
2399 break;
2400 default:
2401 s = "??";
2402 }
2403 seq_printf(m, "%-16s %s\n", "mstate", s);
2404
2405 seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
2406 seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
2407 seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
2408 seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
2409
2410 for (i = 0; i < cs->channels; i++) {
2411 seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
2412 cs->bcs[i].corrupted);
2413 seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
2414 cs->bcs[i].trans_down);
2415 seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
2416 cs->bcs[i].trans_up);
2417 seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
2418 cs->bcs[i].chstate);
2419 switch (cs->bcs[i].proto2) {
2420 case L2_BITSYNC:
2421 s = "bitsync";
2422 break;
2423 case L2_HDLC:
2424 s = "HDLC";
2425 break;
2426 case L2_VOICE:
2427 s = "voice";
2428 break;
2429 default:
2430 s = "??";
2431 }
2432 seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
2433 }
2434 return 0;
2435 }
2436
2437 /**
2438 * gigaset_isdn_regdev() - register device to LL
2439 * @cs: device descriptor structure.
2440 * @isdnid: device name.
2441 *
2442 * Return value: 0 on success, error code < 0 on failure
2443 */
gigaset_isdn_regdev(struct cardstate * cs,const char * isdnid)2444 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
2445 {
2446 struct gigaset_capi_ctr *iif;
2447 int rc;
2448
2449 iif = kzalloc(sizeof(*iif), GFP_KERNEL);
2450 if (!iif) {
2451 pr_err("%s: out of memory\n", __func__);
2452 return -ENOMEM;
2453 }
2454
2455 /* prepare controller structure */
2456 iif->ctr.owner = THIS_MODULE;
2457 iif->ctr.driverdata = cs;
2458 strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name) - 1);
2459 iif->ctr.driver_name = "gigaset";
2460 iif->ctr.load_firmware = NULL;
2461 iif->ctr.reset_ctr = NULL;
2462 iif->ctr.register_appl = gigaset_register_appl;
2463 iif->ctr.release_appl = gigaset_release_appl;
2464 iif->ctr.send_message = gigaset_send_message;
2465 iif->ctr.procinfo = gigaset_procinfo;
2466 iif->ctr.proc_show = gigaset_proc_show,
2467 INIT_LIST_HEAD(&iif->appls);
2468 skb_queue_head_init(&iif->sendqueue);
2469 atomic_set(&iif->sendqlen, 0);
2470
2471 /* register controller with CAPI */
2472 rc = attach_capi_ctr(&iif->ctr);
2473 if (rc) {
2474 pr_err("attach_capi_ctr failed (%d)\n", rc);
2475 kfree(iif);
2476 return rc;
2477 }
2478
2479 cs->iif = iif;
2480 cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
2481 return 0;
2482 }
2483
2484 /**
2485 * gigaset_isdn_unregdev() - unregister device from LL
2486 * @cs: device descriptor structure.
2487 */
gigaset_isdn_unregdev(struct cardstate * cs)2488 void gigaset_isdn_unregdev(struct cardstate *cs)
2489 {
2490 struct gigaset_capi_ctr *iif = cs->iif;
2491
2492 detach_capi_ctr(&iif->ctr);
2493 kfree(iif);
2494 cs->iif = NULL;
2495 }
2496
2497 static struct capi_driver capi_driver_gigaset = {
2498 .name = "gigaset",
2499 .revision = "1.0",
2500 };
2501
2502 /**
2503 * gigaset_isdn_regdrv() - register driver to LL
2504 */
gigaset_isdn_regdrv(void)2505 void gigaset_isdn_regdrv(void)
2506 {
2507 pr_info("Kernel CAPI interface\n");
2508 register_capi_driver(&capi_driver_gigaset);
2509 }
2510
2511 /**
2512 * gigaset_isdn_unregdrv() - unregister driver from LL
2513 */
gigaset_isdn_unregdrv(void)2514 void gigaset_isdn_unregdrv(void)
2515 {
2516 unregister_capi_driver(&capi_driver_gigaset);
2517 }
2518
