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-rw-r--r--net/irda/ircomm/ircomm_tty_attach.c1006
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diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c
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1/*********************************************************************
2 *
3 * Filename: ircomm_tty_attach.c
4 * Version:
5 * Description: Code for attaching the serial driver to IrCOMM
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sat Jun 5 17:42:00 1999
9 * Modified at: Tue Jan 4 14:20:49 2000
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
13 * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 * MA 02111-1307 USA
29 *
30 ********************************************************************/
31
32#include <linux/sched.h>
33#include <linux/init.h>
34
35#include <net/irda/irda.h>
36#include <net/irda/irlmp.h>
37#include <net/irda/iriap.h>
38#include <net/irda/irttp.h>
39#include <net/irda/irias_object.h>
40#include <net/irda/parameters.h>
41
42#include <net/irda/ircomm_core.h>
43#include <net/irda/ircomm_param.h>
44#include <net/irda/ircomm_event.h>
45
46#include <net/irda/ircomm_tty.h>
47#include <net/irda/ircomm_tty_attach.h>
48
49static void ircomm_tty_ias_register(struct ircomm_tty_cb *self);
50static void ircomm_tty_discovery_indication(discinfo_t *discovery,
51 DISCOVERY_MODE mode,
52 void *priv);
53static void ircomm_tty_getvalue_confirm(int result, __u16 obj_id,
54 struct ias_value *value, void *priv);
55static void ircomm_tty_start_watchdog_timer(struct ircomm_tty_cb *self,
56 int timeout);
57static void ircomm_tty_watchdog_timer_expired(void *data);
58
59static int ircomm_tty_state_idle(struct ircomm_tty_cb *self,
60 IRCOMM_TTY_EVENT event,
61 struct sk_buff *skb,
62 struct ircomm_tty_info *info);
63static int ircomm_tty_state_search(struct ircomm_tty_cb *self,
64 IRCOMM_TTY_EVENT event,
65 struct sk_buff *skb,
66 struct ircomm_tty_info *info);
67static int ircomm_tty_state_query_parameters(struct ircomm_tty_cb *self,
68 IRCOMM_TTY_EVENT event,
69 struct sk_buff *skb,
70 struct ircomm_tty_info *info);
71static int ircomm_tty_state_query_lsap_sel(struct ircomm_tty_cb *self,
72 IRCOMM_TTY_EVENT event,
73 struct sk_buff *skb,
74 struct ircomm_tty_info *info);
75static int ircomm_tty_state_setup(struct ircomm_tty_cb *self,
76 IRCOMM_TTY_EVENT event,
77 struct sk_buff *skb,
78 struct ircomm_tty_info *info);
79static int ircomm_tty_state_ready(struct ircomm_tty_cb *self,
80 IRCOMM_TTY_EVENT event,
81 struct sk_buff *skb,
82 struct ircomm_tty_info *info);
83
84char *ircomm_tty_state[] = {
85 "IRCOMM_TTY_IDLE",
86 "IRCOMM_TTY_SEARCH",
87 "IRCOMM_TTY_QUERY_PARAMETERS",
88 "IRCOMM_TTY_QUERY_LSAP_SEL",
89 "IRCOMM_TTY_SETUP",
90 "IRCOMM_TTY_READY",
91 "*** ERROR *** ",
92};
93
94#ifdef CONFIG_IRDA_DEBUG
95static char *ircomm_tty_event[] = {
96 "IRCOMM_TTY_ATTACH_CABLE",
97 "IRCOMM_TTY_DETACH_CABLE",
98 "IRCOMM_TTY_DATA_REQUEST",
99 "IRCOMM_TTY_DATA_INDICATION",
100 "IRCOMM_TTY_DISCOVERY_REQUEST",
101 "IRCOMM_TTY_DISCOVERY_INDICATION",
102 "IRCOMM_TTY_CONNECT_CONFIRM",
103 "IRCOMM_TTY_CONNECT_INDICATION",
104 "IRCOMM_TTY_DISCONNECT_REQUEST",
105 "IRCOMM_TTY_DISCONNECT_INDICATION",
106 "IRCOMM_TTY_WD_TIMER_EXPIRED",
107 "IRCOMM_TTY_GOT_PARAMETERS",
108 "IRCOMM_TTY_GOT_LSAPSEL",
109 "*** ERROR ****",
110};
111#endif /* CONFIG_IRDA_DEBUG */
112
113static int (*state[])(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event,
114 struct sk_buff *skb, struct ircomm_tty_info *info) =
115{
116 ircomm_tty_state_idle,
117 ircomm_tty_state_search,
118 ircomm_tty_state_query_parameters,
119 ircomm_tty_state_query_lsap_sel,
120 ircomm_tty_state_setup,
121 ircomm_tty_state_ready,
122};
123
124/*
125 * Function ircomm_tty_attach_cable (driver)
126 *
127 * Try to attach cable (IrCOMM link). This function will only return
128 * when the link has been connected, or if an error condition occurs.
129 * If success, the return value is the resulting service type.
130 */
131int ircomm_tty_attach_cable(struct ircomm_tty_cb *self)
132{
133 IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
134
135 IRDA_ASSERT(self != NULL, return -1;);
136 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
137
138 /* Check if somebody has already connected to us */
139 if (ircomm_is_connected(self->ircomm)) {
140 IRDA_DEBUG(0, "%s(), already connected!\n", __FUNCTION__ );
141 return 0;
142 }
143
144 /* Make sure nobody tries to write before the link is up */
145 self->tty->hw_stopped = 1;
146
147 ircomm_tty_ias_register(self);
148
149 ircomm_tty_do_event(self, IRCOMM_TTY_ATTACH_CABLE, NULL, NULL);
150
151 return 0;
152}
153
154/*
155 * Function ircomm_detach_cable (driver)
156 *
157 * Detach cable, or cable has been detached by peer
158 *
159 */
160void ircomm_tty_detach_cable(struct ircomm_tty_cb *self)
161{
162 IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
163
164 IRDA_ASSERT(self != NULL, return;);
165 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
166
167 del_timer(&self->watchdog_timer);
168
169 /* Remove discovery handler */
170 if (self->ckey) {
171 irlmp_unregister_client(self->ckey);
172 self->ckey = NULL;
173 }
174 /* Remove IrCOMM hint bits */
175 if (self->skey) {
176 irlmp_unregister_service(self->skey);
177 self->skey = NULL;
178 }
179
180 if (self->iriap) {
181 iriap_close(self->iriap);
182 self->iriap = NULL;
183 }
184
185 /* Remove LM-IAS object */
186 if (self->obj) {
187 irias_delete_object(self->obj);
188 self->obj = NULL;
189 }
190
191 ircomm_tty_do_event(self, IRCOMM_TTY_DETACH_CABLE, NULL, NULL);
192
193 /* Reset some values */
194 self->daddr = self->saddr = 0;
195 self->dlsap_sel = self->slsap_sel = 0;
196
197 memset(&self->settings, 0, sizeof(struct ircomm_params));
198}
199
200/*
201 * Function ircomm_tty_ias_register (self)
202 *
203 * Register with LM-IAS depending on which service type we are
204 *
205 */
206static void ircomm_tty_ias_register(struct ircomm_tty_cb *self)
207{
208 __u8 oct_seq[6];
209 __u16 hints;
210
211 IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
212
213 IRDA_ASSERT(self != NULL, return;);
214 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
215
216 /* Compute hint bits based on service */
217 hints = irlmp_service_to_hint(S_COMM);
218 if (self->service_type & IRCOMM_3_WIRE_RAW)
219 hints |= irlmp_service_to_hint(S_PRINTER);
220
221 /* Advertise IrCOMM hint bit in discovery */
222 if (!self->skey)
223 self->skey = irlmp_register_service(hints);
224 /* Set up a discovery handler */
225 if (!self->ckey)
226 self->ckey = irlmp_register_client(hints,
227 ircomm_tty_discovery_indication,
228 NULL, (void *) self);
229
230 /* If already done, no need to do it again */
231 if (self->obj)
232 return;
233
234 if (self->service_type & IRCOMM_3_WIRE_RAW) {
235 /* Register IrLPT with LM-IAS */
236 self->obj = irias_new_object("IrLPT", IAS_IRLPT_ID);
237 irias_add_integer_attrib(self->obj, "IrDA:IrLMP:LsapSel",
238 self->slsap_sel, IAS_KERNEL_ATTR);
239 } else {
240 /* Register IrCOMM with LM-IAS */
241 self->obj = irias_new_object("IrDA:IrCOMM", IAS_IRCOMM_ID);
242 irias_add_integer_attrib(self->obj, "IrDA:TinyTP:LsapSel",
243 self->slsap_sel, IAS_KERNEL_ATTR);
244
245 /* Code the parameters into the buffer */
246 irda_param_pack(oct_seq, "bbbbbb",
247 IRCOMM_SERVICE_TYPE, 1, self->service_type,
248 IRCOMM_PORT_TYPE, 1, IRCOMM_SERIAL);
249
250 /* Register parameters with LM-IAS */
251 irias_add_octseq_attrib(self->obj, "Parameters", oct_seq, 6,
252 IAS_KERNEL_ATTR);
253 }
254 irias_insert_object(self->obj);
255}
256
257/*
258 * Function ircomm_tty_ias_unregister (self)
259 *
260 * Remove our IAS object and client hook while connected.
261 *
262 */
263static void ircomm_tty_ias_unregister(struct ircomm_tty_cb *self)
264{
265 /* Remove LM-IAS object now so it is not reused.
266 * IrCOMM deals very poorly with multiple incoming connections.
267 * It should looks a lot more like IrNET, and "dup" a server TSAP
268 * to the application TSAP (based on various rules).
269 * This is a cheap workaround allowing multiple clients to
270 * connect to us. It will not always work.
271 * Each IrCOMM socket has an IAS entry. Incoming connection will
272 * pick the first one found. So, when we are fully connected,
273 * we remove our IAS entries so that the next IAS entry is used.
274 * We do that for *both* client and server, because a server
275 * can also create client instances.
276 * Jean II */
277 if (self->obj) {
278 irias_delete_object(self->obj);
279 self->obj = NULL;
280 }
281
282#if 0
283 /* Remove discovery handler.
284 * While we are connected, we no longer need to receive
285 * discovery events. This would be the case if there is
286 * multiple IrLAP interfaces. Jean II */
287 if (self->ckey) {
288 irlmp_unregister_client(self->ckey);
289 self->ckey = NULL;
290 }
291#endif
292}
293
294/*
295 * Function ircomm_send_initial_parameters (self)
296 *
297 * Send initial parameters to the remote IrCOMM device. These parameters
298 * must be sent before any data.
299 */
300int ircomm_tty_send_initial_parameters(struct ircomm_tty_cb *self)
301{
302 IRDA_ASSERT(self != NULL, return -1;);
303 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
304
305 if (self->service_type & IRCOMM_3_WIRE_RAW)
306 return 0;
307
308 /*
309 * Set default values, but only if the application for some reason
310 * haven't set them already
311 */
312 IRDA_DEBUG(2, "%s(), data-rate = %d\n", __FUNCTION__ ,
313 self->settings.data_rate);
314 if (!self->settings.data_rate)
315 self->settings.data_rate = 9600;
316 IRDA_DEBUG(2, "%s(), data-format = %d\n", __FUNCTION__ ,
317 self->settings.data_format);
318 if (!self->settings.data_format)
319 self->settings.data_format = IRCOMM_WSIZE_8; /* 8N1 */
320
321 IRDA_DEBUG(2, "%s(), flow-control = %d\n", __FUNCTION__ ,
322 self->settings.flow_control);
323 /*self->settings.flow_control = IRCOMM_RTS_CTS_IN|IRCOMM_RTS_CTS_OUT;*/
324
325 /* Do not set delta values for the initial parameters */
326 self->settings.dte = IRCOMM_DTR | IRCOMM_RTS;
327
328 /* Only send service type parameter when we are the client */
329 if (self->client)
330 ircomm_param_request(self, IRCOMM_SERVICE_TYPE, FALSE);
331 ircomm_param_request(self, IRCOMM_DATA_RATE, FALSE);
332 ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE);
333
334 /* For a 3 wire service, we just flush the last parameter and return */
335 if (self->settings.service_type == IRCOMM_3_WIRE) {
336 ircomm_param_request(self, IRCOMM_FLOW_CONTROL, TRUE);
337 return 0;
338 }
339
340 /* Only 9-wire service types continue here */
341 ircomm_param_request(self, IRCOMM_FLOW_CONTROL, FALSE);
342#if 0
343 ircomm_param_request(self, IRCOMM_XON_XOFF, FALSE);
344 ircomm_param_request(self, IRCOMM_ENQ_ACK, FALSE);
345#endif
346 /* Notify peer that we are ready to receive data */
347 ircomm_param_request(self, IRCOMM_DTE, TRUE);
348
349 return 0;
350}
351
352/*
353 * Function ircomm_tty_discovery_indication (discovery)
354 *
355 * Remote device is discovered, try query the remote IAS to see which
356 * device it is, and which services it has.
357 *
358 */
359static void ircomm_tty_discovery_indication(discinfo_t *discovery,
360 DISCOVERY_MODE mode,
361 void *priv)
362{
363 struct ircomm_tty_cb *self;
364 struct ircomm_tty_info info;
365
366 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
367
368 /* Important note :
369 * We need to drop all passive discoveries.
370 * The LSAP management of IrComm is deficient and doesn't deal
371 * with the case of two instance connecting to each other
372 * simultaneously (it will deadlock in LMP).
373 * The proper fix would be to use the same technique as in IrNET,
374 * to have one server socket and separate instances for the
375 * connecting/connected socket.
376 * The workaround is to drop passive discovery, which drastically
377 * reduce the probability of this happening.
378 * Jean II */
379 if(mode == DISCOVERY_PASSIVE)
380 return;
381
382 info.daddr = discovery->daddr;
383 info.saddr = discovery->saddr;
384
385 /* FIXME. We have a locking problem on the hashbin here.
386 * We probably need to use hashbin_find_next(), but we first
387 * need to ensure that "line" is unique. - Jean II */
388 self = (struct ircomm_tty_cb *) hashbin_get_first(ircomm_tty);
389 while (self != NULL) {
390 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
391
392 ircomm_tty_do_event(self, IRCOMM_TTY_DISCOVERY_INDICATION,
393 NULL, &info);
394
395 self = (struct ircomm_tty_cb *) hashbin_get_next(ircomm_tty);
396 }
397}
398
399/*
400 * Function ircomm_tty_disconnect_indication (instance, sap, reason, skb)
401 *
402 * Link disconnected
403 *
404 */
405void ircomm_tty_disconnect_indication(void *instance, void *sap,
406 LM_REASON reason,
407 struct sk_buff *skb)
408{
409 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
410
411 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
412
413 IRDA_ASSERT(self != NULL, return;);
414 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
415
416 if (!self->tty)
417 return;
418
419 /* This will stop control data transfers */
420 self->flow = FLOW_STOP;
421
422 /* Stop data transfers */
423 self->tty->hw_stopped = 1;
424
425 ircomm_tty_do_event(self, IRCOMM_TTY_DISCONNECT_INDICATION, NULL,
426 NULL);
427}
428
429/*
430 * Function ircomm_tty_getvalue_confirm (result, obj_id, value, priv)
431 *
432 * Got result from the IAS query we make
433 *
434 */
435static void ircomm_tty_getvalue_confirm(int result, __u16 obj_id,
436 struct ias_value *value,
437 void *priv)
438{
439 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) priv;
440
441 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
442
443 IRDA_ASSERT(self != NULL, return;);
444 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
445
446 /* We probably don't need to make any more queries */
447 iriap_close(self->iriap);
448 self->iriap = NULL;
449
450 /* Check if request succeeded */
451 if (result != IAS_SUCCESS) {
452 IRDA_DEBUG(4, "%s(), got NULL value!\n", __FUNCTION__ );
453 return;
454 }
455
456 switch (value->type) {
457 case IAS_OCT_SEQ:
458 IRDA_DEBUG(2, "%s(), got octet sequence\n", __FUNCTION__ );
459
460 irda_param_extract_all(self, value->t.oct_seq, value->len,
461 &ircomm_param_info);
462
463 ircomm_tty_do_event(self, IRCOMM_TTY_GOT_PARAMETERS, NULL,
464 NULL);
465 break;
466 case IAS_INTEGER:
467 /* Got LSAP selector */
468 IRDA_DEBUG(2, "%s(), got lsapsel = %d\n", __FUNCTION__ ,
469 value->t.integer);
470
471 if (value->t.integer == -1) {
472 IRDA_DEBUG(0, "%s(), invalid value!\n", __FUNCTION__ );
473 } else
474 self->dlsap_sel = value->t.integer;
475
476 ircomm_tty_do_event(self, IRCOMM_TTY_GOT_LSAPSEL, NULL, NULL);
477 break;
478 case IAS_MISSING:
479 IRDA_DEBUG(0, "%s(), got IAS_MISSING\n", __FUNCTION__ );
480 break;
481 default:
482 IRDA_DEBUG(0, "%s(), got unknown type!\n", __FUNCTION__ );
483 break;
484 }
485 irias_delete_value(value);
486}
487
488/*
489 * Function ircomm_tty_connect_confirm (instance, sap, qos, max_sdu_size, skb)
490 *
491 * Connection confirmed
492 *
493 */
494void ircomm_tty_connect_confirm(void *instance, void *sap,
495 struct qos_info *qos,
496 __u32 max_data_size,
497 __u8 max_header_size,
498 struct sk_buff *skb)
499{
500 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
501
502 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
503
504 IRDA_ASSERT(self != NULL, return;);
505 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
506
507 self->client = TRUE;
508 self->max_data_size = max_data_size;
509 self->max_header_size = max_header_size;
510 self->flow = FLOW_START;
511
512 ircomm_tty_do_event(self, IRCOMM_TTY_CONNECT_CONFIRM, NULL, NULL);
513
514 /* No need to kfree_skb - see ircomm_ttp_connect_confirm() */
515}
516
517/*
518 * Function ircomm_tty_connect_indication (instance, sap, qos, max_sdu_size,
519 * skb)
520 *
521 * we are discovered and being requested to connect by remote device !
522 *
523 */
524void ircomm_tty_connect_indication(void *instance, void *sap,
525 struct qos_info *qos,
526 __u32 max_data_size,
527 __u8 max_header_size,
528 struct sk_buff *skb)
529{
530 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
531 int clen;
532
533 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
534
535 IRDA_ASSERT(self != NULL, return;);
536 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
537
538 self->client = FALSE;
539 self->max_data_size = max_data_size;
540 self->max_header_size = max_header_size;
541 self->flow = FLOW_START;
542
543 clen = skb->data[0];
544 if (clen)
545 irda_param_extract_all(self, skb->data+1,
546 IRDA_MIN(skb->len, clen),
547 &ircomm_param_info);
548
549 ircomm_tty_do_event(self, IRCOMM_TTY_CONNECT_INDICATION, NULL, NULL);
550
551 /* No need to kfree_skb - see ircomm_ttp_connect_indication() */
552}
553
554/*
555 * Function ircomm_tty_link_established (self)
556 *
557 * Called when the IrCOMM link is established
558 *
559 */
560void ircomm_tty_link_established(struct ircomm_tty_cb *self)
561{
562 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
563
564 IRDA_ASSERT(self != NULL, return;);
565 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
566
567 if (!self->tty)
568 return;
569
570 del_timer(&self->watchdog_timer);
571
572 /*
573 * IrCOMM link is now up, and if we are not using hardware
574 * flow-control, then declare the hardware as running. Otherwise we
575 * will have to wait for the peer device (DCE) to raise the CTS
576 * line.
577 */
578 if ((self->flags & ASYNC_CTS_FLOW) && ((self->settings.dce & IRCOMM_CTS) == 0)) {
579 IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __FUNCTION__ );
580 return;
581 } else {
582 IRDA_DEBUG(1, "%s(), starting hardware!\n", __FUNCTION__ );
583
584 self->tty->hw_stopped = 0;
585
586 /* Wake up processes blocked on open */
587 wake_up_interruptible(&self->open_wait);
588 }
589
590 schedule_work(&self->tqueue);
591}
592
593/*
594 * Function ircomm_tty_start_watchdog_timer (self, timeout)
595 *
596 * Start the watchdog timer. This timer is used to make sure that any
597 * connection attempt is successful, and if not, we will retry after
598 * the timeout
599 */
600static void ircomm_tty_start_watchdog_timer(struct ircomm_tty_cb *self,
601 int timeout)
602{
603 IRDA_ASSERT(self != NULL, return;);
604 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
605
606 irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
607 ircomm_tty_watchdog_timer_expired);
608}
609
610/*
611 * Function ircomm_tty_watchdog_timer_expired (data)
612 *
613 * Called when the connect procedure have taken to much time.
614 *
615 */
616static void ircomm_tty_watchdog_timer_expired(void *data)
617{
618 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) data;
619
620 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
621
622 IRDA_ASSERT(self != NULL, return;);
623 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
624
625 ircomm_tty_do_event(self, IRCOMM_TTY_WD_TIMER_EXPIRED, NULL, NULL);
626}
627
628
629/*
630 * Function ircomm_tty_do_event (self, event, skb)
631 *
632 * Process event
633 *
634 */
635int ircomm_tty_do_event(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event,
636 struct sk_buff *skb, struct ircomm_tty_info *info)
637{
638 IRDA_ASSERT(self != NULL, return -1;);
639 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
640
641 IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
642 ircomm_tty_state[self->state], ircomm_tty_event[event]);
643
644 return (*state[self->state])(self, event, skb, info);
645}
646
647/*
648 * Function ircomm_tty_next_state (self, state)
649 *
650 * Switch state
651 *
652 */
653static inline void ircomm_tty_next_state(struct ircomm_tty_cb *self, IRCOMM_TTY_STATE state)
654{
655 /*
656 IRDA_ASSERT(self != NULL, return;);
657 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
658
659 IRDA_DEBUG(2, "%s: next state=%s, service type=%d\n", __FUNCTION__ ,
660 ircomm_tty_state[self->state], self->service_type);
661 */
662 self->state = state;
663}
664
665/*
666 * Function ircomm_tty_state_idle (self, event, skb, info)
667 *
668 * Just hanging around
669 *
670 */
671static int ircomm_tty_state_idle(struct ircomm_tty_cb *self,
672 IRCOMM_TTY_EVENT event,
673 struct sk_buff *skb,
674 struct ircomm_tty_info *info)
675{
676 int ret = 0;
677
678 IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
679 ircomm_tty_state[self->state], ircomm_tty_event[event]);
680 switch (event) {
681 case IRCOMM_TTY_ATTACH_CABLE:
682 /* Try to discover any remote devices */
683 ircomm_tty_start_watchdog_timer(self, 3*HZ);
684 ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
685
686 irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);
687 break;
688 case IRCOMM_TTY_DISCOVERY_INDICATION:
689 self->daddr = info->daddr;
690 self->saddr = info->saddr;
691
692 if (self->iriap) {
693 IRDA_WARNING("%s(), busy with a previous query\n",
694 __FUNCTION__);
695 return -EBUSY;
696 }
697
698 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
699 ircomm_tty_getvalue_confirm);
700
701 iriap_getvaluebyclass_request(self->iriap,
702 self->saddr, self->daddr,
703 "IrDA:IrCOMM", "Parameters");
704
705 ircomm_tty_start_watchdog_timer(self, 3*HZ);
706 ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_PARAMETERS);
707 break;
708 case IRCOMM_TTY_CONNECT_INDICATION:
709 del_timer(&self->watchdog_timer);
710
711 /* Accept connection */
712 ircomm_connect_response(self->ircomm, NULL);
713 ircomm_tty_next_state(self, IRCOMM_TTY_READY);
714 break;
715 case IRCOMM_TTY_WD_TIMER_EXPIRED:
716 /* Just stay idle */
717 break;
718 case IRCOMM_TTY_DETACH_CABLE:
719 ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
720 break;
721 default:
722 IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
723 ircomm_tty_event[event]);
724 ret = -EINVAL;
725 }
726 return ret;
727}
728
729/*
730 * Function ircomm_tty_state_search (self, event, skb, info)
731 *
732 * Trying to discover an IrCOMM device
733 *
734 */
735static int ircomm_tty_state_search(struct ircomm_tty_cb *self,
736 IRCOMM_TTY_EVENT event,
737 struct sk_buff *skb,
738 struct ircomm_tty_info *info)
739{
740 int ret = 0;
741
742 IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
743 ircomm_tty_state[self->state], ircomm_tty_event[event]);
744
745 switch (event) {
746 case IRCOMM_TTY_DISCOVERY_INDICATION:
747 self->daddr = info->daddr;
748 self->saddr = info->saddr;
749
750 if (self->iriap) {
751 IRDA_WARNING("%s(), busy with a previous query\n",
752 __FUNCTION__);
753 return -EBUSY;
754 }
755
756 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
757 ircomm_tty_getvalue_confirm);
758
759 if (self->service_type == IRCOMM_3_WIRE_RAW) {
760 iriap_getvaluebyclass_request(self->iriap, self->saddr,
761 self->daddr, "IrLPT",
762 "IrDA:IrLMP:LsapSel");
763 ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_LSAP_SEL);
764 } else {
765 iriap_getvaluebyclass_request(self->iriap, self->saddr,
766 self->daddr,
767 "IrDA:IrCOMM",
768 "Parameters");
769
770 ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_PARAMETERS);
771 }
772 ircomm_tty_start_watchdog_timer(self, 3*HZ);
773 break;
774 case IRCOMM_TTY_CONNECT_INDICATION:
775 del_timer(&self->watchdog_timer);
776 ircomm_tty_ias_unregister(self);
777
778 /* Accept connection */
779 ircomm_connect_response(self->ircomm, NULL);
780 ircomm_tty_next_state(self, IRCOMM_TTY_READY);
781 break;
782 case IRCOMM_TTY_WD_TIMER_EXPIRED:
783#if 1
784 /* Give up */
785#else
786 /* Try to discover any remote devices */
787 ircomm_tty_start_watchdog_timer(self, 3*HZ);
788 irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);
789#endif
790 break;
791 case IRCOMM_TTY_DETACH_CABLE:
792 ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
793 break;
794 default:
795 IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
796 ircomm_tty_event[event]);
797 ret = -EINVAL;
798 }
799 return ret;
800}
801
802/*
803 * Function ircomm_tty_state_query (self, event, skb, info)
804 *
805 * Querying the remote LM-IAS for IrCOMM parameters
806 *
807 */
808static int ircomm_tty_state_query_parameters(struct ircomm_tty_cb *self,
809 IRCOMM_TTY_EVENT event,
810 struct sk_buff *skb,
811 struct ircomm_tty_info *info)
812{
813 int ret = 0;
814
815 IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
816 ircomm_tty_state[self->state], ircomm_tty_event[event]);
817
818 switch (event) {
819 case IRCOMM_TTY_GOT_PARAMETERS:
820 if (self->iriap) {
821 IRDA_WARNING("%s(), busy with a previous query\n",
822 __FUNCTION__);
823 return -EBUSY;
824 }
825
826 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
827 ircomm_tty_getvalue_confirm);
828
829 iriap_getvaluebyclass_request(self->iriap, self->saddr,
830 self->daddr, "IrDA:IrCOMM",
831 "IrDA:TinyTP:LsapSel");
832
833 ircomm_tty_start_watchdog_timer(self, 3*HZ);
834 ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_LSAP_SEL);
835 break;
836 case IRCOMM_TTY_WD_TIMER_EXPIRED:
837 /* Go back to search mode */
838 ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
839 ircomm_tty_start_watchdog_timer(self, 3*HZ);
840 break;
841 case IRCOMM_TTY_CONNECT_INDICATION:
842 del_timer(&self->watchdog_timer);
843 ircomm_tty_ias_unregister(self);
844
845 /* Accept connection */
846 ircomm_connect_response(self->ircomm, NULL);
847 ircomm_tty_next_state(self, IRCOMM_TTY_READY);
848 break;
849 case IRCOMM_TTY_DETACH_CABLE:
850 ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
851 break;
852 default:
853 IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
854 ircomm_tty_event[event]);
855 ret = -EINVAL;
856 }
857 return ret;
858}
859
860/*
861 * Function ircomm_tty_state_query_lsap_sel (self, event, skb, info)
862 *
863 * Query remote LM-IAS for the LSAP selector which we can connect to
864 *
865 */
866static int ircomm_tty_state_query_lsap_sel(struct ircomm_tty_cb *self,
867 IRCOMM_TTY_EVENT event,
868 struct sk_buff *skb,
869 struct ircomm_tty_info *info)
870{
871 int ret = 0;
872
873 IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
874 ircomm_tty_state[self->state], ircomm_tty_event[event]);
875
876 switch (event) {
877 case IRCOMM_TTY_GOT_LSAPSEL:
878 /* Connect to remote device */
879 ret = ircomm_connect_request(self->ircomm, self->dlsap_sel,
880 self->saddr, self->daddr,
881 NULL, self->service_type);
882 ircomm_tty_start_watchdog_timer(self, 3*HZ);
883 ircomm_tty_next_state(self, IRCOMM_TTY_SETUP);
884 break;
885 case IRCOMM_TTY_WD_TIMER_EXPIRED:
886 /* Go back to search mode */
887 ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
888 ircomm_tty_start_watchdog_timer(self, 3*HZ);
889 break;
890 case IRCOMM_TTY_CONNECT_INDICATION:
891 del_timer(&self->watchdog_timer);
892 ircomm_tty_ias_unregister(self);
893
894 /* Accept connection */
895 ircomm_connect_response(self->ircomm, NULL);
896 ircomm_tty_next_state(self, IRCOMM_TTY_READY);
897 break;
898 case IRCOMM_TTY_DETACH_CABLE:
899 ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
900 break;
901 default:
902 IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
903 ircomm_tty_event[event]);
904 ret = -EINVAL;
905 }
906 return ret;
907}
908
909/*
910 * Function ircomm_tty_state_setup (self, event, skb, info)
911 *
912 * Trying to connect
913 *
914 */
915static int ircomm_tty_state_setup(struct ircomm_tty_cb *self,
916 IRCOMM_TTY_EVENT event,
917 struct sk_buff *skb,
918 struct ircomm_tty_info *info)
919{
920 int ret = 0;
921
922 IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
923 ircomm_tty_state[self->state], ircomm_tty_event[event]);
924
925 switch (event) {
926 case IRCOMM_TTY_CONNECT_CONFIRM:
927 del_timer(&self->watchdog_timer);
928 ircomm_tty_ias_unregister(self);
929
930 /*
931 * Send initial parameters. This will also send out queued
932 * parameters waiting for the connection to come up
933 */
934 ircomm_tty_send_initial_parameters(self);
935 ircomm_tty_link_established(self);
936 ircomm_tty_next_state(self, IRCOMM_TTY_READY);
937 break;
938 case IRCOMM_TTY_CONNECT_INDICATION:
939 del_timer(&self->watchdog_timer);
940 ircomm_tty_ias_unregister(self);
941
942 /* Accept connection */
943 ircomm_connect_response(self->ircomm, NULL);
944 ircomm_tty_next_state(self, IRCOMM_TTY_READY);
945 break;
946 case IRCOMM_TTY_WD_TIMER_EXPIRED:
947 /* Go back to search mode */
948 ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
949 ircomm_tty_start_watchdog_timer(self, 3*HZ);
950 break;
951 case IRCOMM_TTY_DETACH_CABLE:
952 /* ircomm_disconnect_request(self->ircomm, NULL); */
953 ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
954 break;
955 default:
956 IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
957 ircomm_tty_event[event]);
958 ret = -EINVAL;
959 }
960 return ret;
961}
962
963/*
964 * Function ircomm_tty_state_ready (self, event, skb, info)
965 *
966 * IrCOMM is now connected
967 *
968 */
969static int ircomm_tty_state_ready(struct ircomm_tty_cb *self,
970 IRCOMM_TTY_EVENT event,
971 struct sk_buff *skb,
972 struct ircomm_tty_info *info)
973{
974 int ret = 0;
975
976 switch (event) {
977 case IRCOMM_TTY_DATA_REQUEST:
978 ret = ircomm_data_request(self->ircomm, skb);
979 break;
980 case IRCOMM_TTY_DETACH_CABLE:
981 ircomm_disconnect_request(self->ircomm, NULL);
982 ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
983 break;
984 case IRCOMM_TTY_DISCONNECT_INDICATION:
985 ircomm_tty_ias_register(self);
986 ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
987 ircomm_tty_start_watchdog_timer(self, 3*HZ);
988
989 if (self->flags & ASYNC_CHECK_CD) {
990 /* Drop carrier */
991 self->settings.dce = IRCOMM_DELTA_CD;
992 ircomm_tty_check_modem_status(self);
993 } else {
994 IRDA_DEBUG(0, "%s(), hanging up!\n", __FUNCTION__ );
995 if (self->tty)
996 tty_hangup(self->tty);
997 }
998 break;
999 default:
1000 IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
1001 ircomm_tty_event[event]);
1002 ret = -EINVAL;
1003 }
1004 return ret;
1005}
1006
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-13 03:15:50 -0500