1 /******************************************************************************
2 *
3 * Copyright (C) 1999-2012 Broadcom Corporation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18
19 /******************************************************************************
20 *
21 * This module contains functions for port emulation entity and RFCOMM
22 * communications
23 *
24 ******************************************************************************/
25 #include <string.h>
26
27 #include "osi/include/mutex.h"
28 #include "osi/include/osi.h"
29
30 #include "bt_common.h"
31 #include "bt_target.h"
32 #include "bt_utils.h"
33 #include "btm_api.h"
34 #include "btm_int.h"
35 #include "port_api.h"
36 #include "port_int.h"
37 #include "rfc_int.h"
38 #include "rfcdefs.h"
39
40 /*
41 * Local function definitions
42 */
43 uint32_t port_rfc_send_tx_data(tPORT* p_port);
44 void port_rfc_closed(tPORT* p_port, uint8_t res);
45 void port_get_credits(tPORT* p_port, uint8_t k);
46
47 /*******************************************************************************
48 *
49 * Function port_open_continue
50 *
51 * Description This function is called after security manager completes
52 * required security checks.
53 *
54 * Returns void
55 *
56 ******************************************************************************/
port_open_continue(tPORT * p_port)57 int port_open_continue(tPORT* p_port) {
58 tRFC_MCB* p_mcb;
59
60 RFCOMM_TRACE_EVENT("port_open_continue, p_port:%p", p_port);
61
62 /* Check if multiplexer channel has already been established */
63 p_mcb = rfc_alloc_multiplexer_channel(p_port->bd_addr, true);
64 if (p_mcb == NULL) {
65 RFCOMM_TRACE_WARNING("port_open_continue no mx channel");
66 port_release_port(p_port);
67 return (PORT_NO_RESOURCES);
68 }
69
70 p_port->rfc.p_mcb = p_mcb;
71
72 p_mcb->port_inx[p_port->dlci] = p_port->inx;
73
74 /* Connection is up and we know local and remote features, select MTU */
75 port_select_mtu(p_port);
76
77 if (p_mcb->state == RFC_MX_STATE_CONNECTED) {
78 RFCOMM_ParNegReq(p_mcb, p_port->dlci, p_port->mtu);
79 } else if ((p_mcb->state == RFC_MX_STATE_IDLE) ||
80 (p_mcb->state == RFC_MX_STATE_DISC_WAIT_UA)) {
81 /* In RFC_MX_STATE_IDLE state, MX state machine will create connection */
82 /* In RFC_MX_STATE_DISC_WAIT_UA state, MX state machine will recreate
83 * connection */
84 /* after disconnecting is completed */
85 RFCOMM_StartReq(p_mcb);
86 } else {
87 /* MX state machine ignores RFC_MX_EVENT_START_REQ in these states */
88 /* When it enters RFC_MX_STATE_CONNECTED, it will check any openning ports
89 */
90 RFCOMM_TRACE_DEBUG(
91 "port_open_continue: mx state(%d) mx channel is openning",
92 p_mcb->state);
93 }
94 return (PORT_SUCCESS);
95 }
96
97 /*******************************************************************************
98 *
99 * Function port_start_control
100 *
101 * Description This function is called in the BTU_TASK context to
102 * send control information
103 *
104 * Returns void
105 *
106 ******************************************************************************/
port_start_control(tPORT * p_port)107 void port_start_control(tPORT* p_port) {
108 tRFC_MCB* p_mcb = p_port->rfc.p_mcb;
109
110 if (p_mcb == NULL) return;
111
112 RFCOMM_ControlReq(p_mcb, p_port->dlci, &p_port->local_ctrl);
113 }
114
115 /*******************************************************************************
116 *
117 * Function port_start_par_neg
118 *
119 * Description This function is called in the BTU_TASK context to
120 * send configuration information
121 *
122 * Returns void
123 *
124 ******************************************************************************/
port_start_par_neg(tPORT * p_port)125 void port_start_par_neg(tPORT* p_port) {
126 tRFC_MCB* p_mcb = p_port->rfc.p_mcb;
127
128 if (p_mcb == NULL) return;
129
130 RFCOMM_PortNegReq(p_mcb, p_port->dlci, &p_port->user_port_pars);
131 }
132
133 /*******************************************************************************
134 *
135 * Function port_start_close
136 *
137 * Description This function is called in the BTU_TASK context to
138 * release DLC
139 *
140 * Returns void
141 *
142 ******************************************************************************/
port_start_close(tPORT * p_port)143 void port_start_close(tPORT* p_port) {
144 tRFC_MCB* p_mcb = p_port->rfc.p_mcb;
145 uint8_t old_signals;
146 uint32_t events = 0;
147
148 /* At first indicate to the user that signals on the connection were dropped
149 */
150 p_port->line_status |= LINE_STATUS_FAILED;
151 old_signals = p_port->peer_ctrl.modem_signal;
152
153 p_port->peer_ctrl.modem_signal &=
154 ~(PORT_DTRDSR_ON | PORT_CTSRTS_ON | PORT_DCD_ON);
155
156 events |= port_get_signal_changes(p_port, old_signals,
157 p_port->peer_ctrl.modem_signal);
158
159 if (p_port->ev_mask & PORT_EV_CONNECT_ERR) events |= PORT_EV_CONNECT_ERR;
160
161 if (p_port->ev_mask & PORT_EV_ERR) events |= PORT_EV_ERR;
162
163 if ((p_port->p_callback != NULL) && events)
164 p_port->p_callback(events, p_port->inx);
165
166 /* Check if RFCOMM side has been closed while the message was queued */
167 if ((p_mcb == NULL) || (p_port->rfc.state == RFC_STATE_CLOSED)) {
168 /* Call management callback function before calling port_release_port() to
169 * clear tPort */
170 if (p_port->p_mgmt_callback)
171 p_port->p_mgmt_callback(PORT_CLOSED, p_port->inx);
172
173 port_release_port(p_port);
174 } else {
175 RFCOMM_DlcReleaseReq(p_mcb, p_port->dlci);
176 }
177 }
178
179 /*******************************************************************************
180 *
181 * Function PORT_StartCnf
182 *
183 * Description This function is called from the RFCOMM layer when
184 * establishing of the multiplexer channel is completed.
185 * Continue establishing of the connection for all ports that
186 * are in the OPENING state
187 *
188 ******************************************************************************/
PORT_StartCnf(tRFC_MCB * p_mcb,uint16_t result)189 void PORT_StartCnf(tRFC_MCB* p_mcb, uint16_t result) {
190 tPORT* p_port;
191 int i;
192 bool no_ports_up = true;
193
194 RFCOMM_TRACE_EVENT("PORT_StartCnf result:%d", result);
195
196 p_port = &rfc_cb.port.port[0];
197 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
198 if (p_port->rfc.p_mcb == p_mcb) {
199 no_ports_up = false;
200
201 if (result == RFCOMM_SUCCESS)
202 RFCOMM_ParNegReq(p_mcb, p_port->dlci, p_port->mtu);
203 else {
204 RFCOMM_TRACE_WARNING("PORT_StartCnf failed result:%d", result);
205
206 /* Warning: result is also set to 4 when l2cap connection
207 fails due to l2cap connect cnf (no_resources) */
208 if (result == HCI_ERR_PAGE_TIMEOUT)
209 p_port->error = PORT_PAGE_TIMEOUT;
210 else
211 p_port->error = PORT_START_FAILED;
212
213 rfc_release_multiplexer_channel(p_mcb);
214
215 /* Send event to the application */
216 if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECT_ERR))
217 (p_port->p_callback)(PORT_EV_CONNECT_ERR, p_port->inx);
218
219 if (p_port->p_mgmt_callback)
220 p_port->p_mgmt_callback(PORT_START_FAILED, p_port->inx);
221
222 port_release_port(p_port);
223 }
224 }
225 }
226
227 /* There can be a situation when after starting connection, user closes the */
228 /* port, we can catch it here to close multiplexor channel */
229 if (no_ports_up) {
230 rfc_check_mcb_active(p_mcb);
231 }
232 }
233
234 /*******************************************************************************
235 *
236 * Function PORT_StartInd
237 *
238 * Description This function is called from the RFCOMM layer when
239 * some peer device wants to establish a multiplexer
240 * connection. Check if there are any ports open with this
241 * or not assigned multiplexer.
242 *
243 ******************************************************************************/
PORT_StartInd(tRFC_MCB * p_mcb)244 void PORT_StartInd(tRFC_MCB* p_mcb) {
245 tPORT* p_port;
246 int i;
247
248 RFCOMM_TRACE_EVENT("PORT_StartInd");
249
250 p_port = &rfc_cb.port.port[0];
251 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
252 if ((p_port->rfc.p_mcb == NULL) || (p_port->rfc.p_mcb == p_mcb)) {
253 RFCOMM_TRACE_DEBUG(
254 "PORT_StartInd, RFCOMM_StartRsp RFCOMM_SUCCESS: p_mcb:%p", p_mcb);
255 RFCOMM_StartRsp(p_mcb, RFCOMM_SUCCESS);
256 return;
257 }
258 }
259 RFCOMM_StartRsp(p_mcb, RFCOMM_ERROR);
260 }
261
262 /*******************************************************************************
263 *
264 * Function PORT_ParNegInd
265 *
266 * Description This function is called from the RFCOMM layer to change
267 * DLCI parameters (currently only MTU is negotiated).
268 * If can not find the port do not accept the request.
269 * Otherwise save the MTU size supported by the peer.
270 *
271 ******************************************************************************/
PORT_ParNegInd(tRFC_MCB * p_mcb,uint8_t dlci,uint16_t mtu,uint8_t cl,uint8_t k)272 void PORT_ParNegInd(tRFC_MCB* p_mcb, uint8_t dlci, uint16_t mtu, uint8_t cl,
273 uint8_t k) {
274 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
275 uint8_t our_cl;
276 uint8_t our_k;
277
278 RFCOMM_TRACE_EVENT("PORT_ParNegInd dlci:%d mtu:%d", dlci, mtu);
279
280 if (!p_port) {
281 /* This can be a first request for this port */
282 p_port = port_find_dlci_port(dlci);
283 if (!p_port) {
284 /* If the port cannot be opened, send a DM. Per Errata 1205 */
285 rfc_send_dm(p_mcb, dlci, false);
286 /* check if this is the last port open, some headsets have
287 problem, they don't disconnect if we send DM */
288 rfc_check_mcb_active(p_mcb);
289 RFCOMM_TRACE_EVENT("PORT_ParNegInd: port not found");
290 return;
291 }
292 p_mcb->port_inx[dlci] = p_port->inx;
293 }
294
295 memcpy(p_port->bd_addr, p_mcb->bd_addr, BD_ADDR_LEN);
296
297 /* Connection is up and we know local and remote features, select MTU */
298 port_select_mtu(p_port);
299
300 p_port->rfc.p_mcb = p_mcb;
301 p_port->mtu = (p_port->mtu < mtu) ? p_port->mtu : mtu;
302 p_port->peer_mtu = p_port->mtu;
303
304 /* Negotiate the flow control mechanism. If flow control mechanism for */
305 /* mux has not been set yet, set it now. If either we or peer wants TS 07.10,
306 */
307 /* use that. Otherwise both must want credit based, so use that. If flow is
308 */
309 /* already defined for this mux, we respond with that value. */
310 if (p_mcb->flow == PORT_FC_UNDEFINED) {
311 if ((PORT_FC_DEFAULT == PORT_FC_TS710) ||
312 (cl == RFCOMM_PN_CONV_LAYER_TYPE_1)) {
313 p_mcb->flow = PORT_FC_TS710;
314 } else {
315 p_mcb->flow = PORT_FC_CREDIT;
316 }
317 }
318
319 /* Regardless of our flow control mechanism, if the PN cl is zero, we must */
320 /* respond with zero. "A responding implementation must set this field to 14
321 */
322 /* if (and only if) the PN request was 15." This could happen if a PN is sent
323 */
324 /* after the DLCI is already established-- the PN in that case must have cl =
325 * 0. */
326 /* See RFCOMM spec 5.5.3 */
327 if (cl == RFCOMM_PN_CONV_LAYER_TYPE_1) {
328 our_cl = RFCOMM_PN_CONV_LAYER_TYPE_1;
329 our_k = 0;
330 } else if (p_mcb->flow == PORT_FC_CREDIT) {
331 /* get credits */
332 port_get_credits(p_port, k);
333
334 /* Set convergence layer and number of credits (k) */
335 our_cl = RFCOMM_PN_CONV_LAYER_CBFC_R;
336 our_k = (p_port->credit_rx_max < RFCOMM_K_MAX) ? p_port->credit_rx_max
337 : RFCOMM_K_MAX;
338 p_port->credit_rx = our_k;
339 } else {
340 /* must not be using credit based flow control; use TS 7.10 */
341 our_cl = RFCOMM_PN_CONV_LAYER_TYPE_1;
342 our_k = 0;
343 }
344 RFCOMM_ParNegRsp(p_mcb, dlci, p_port->mtu, our_cl, our_k);
345 }
346
347 /*******************************************************************************
348 *
349 * Function PORT_ParNegCnf
350 *
351 * Description This function is called from the RFCOMM layer to change
352 * DLCI parameters (currently only MTU is negotiated).
353 * Save the MTU size supported by the peer.
354 * If the confirmation is received during the port opening
355 * procedure send EstablishRequest to continue.
356 *
357 ******************************************************************************/
PORT_ParNegCnf(tRFC_MCB * p_mcb,uint8_t dlci,uint16_t mtu,uint8_t cl,uint8_t k)358 void PORT_ParNegCnf(tRFC_MCB* p_mcb, uint8_t dlci, uint16_t mtu, uint8_t cl,
359 uint8_t k) {
360 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
361
362 RFCOMM_TRACE_EVENT("PORT_ParNegCnf dlci:%d mtu:%d cl: %d k: %d", dlci, mtu,
363 cl, k);
364
365 if (!p_port) return;
366
367 /* Flow control mechanism not set yet. Negotiate flow control mechanism. */
368 if (p_mcb->flow == PORT_FC_UNDEFINED) {
369 /* Our stack is configured for TS07.10 and they responded with credit-based.
370 */
371 /* This is illegal-- negotiation fails. */
372 if ((PORT_FC_DEFAULT == PORT_FC_TS710) &&
373 (cl == RFCOMM_PN_CONV_LAYER_CBFC_R)) {
374 rfc_send_disc(p_mcb, p_port->dlci);
375 rfc_port_closed(p_port);
376 return;
377 }
378 /* Our stack is configured for credit-based and they responded with
379 credit-based. */
380 else if (cl == RFCOMM_PN_CONV_LAYER_CBFC_R) {
381 p_mcb->flow = PORT_FC_CREDIT;
382 }
383 /* They responded with any other value. Treat this as negotiation to
384 TS07.10. */
385 else {
386 p_mcb->flow = PORT_FC_TS710;
387 }
388 }
389 /* If mux flow control mechanism set, we honor that setting regardless of */
390 /* the CL value in their response. This allows us to gracefully accept any */
391 /* illegal PN negotiation scenarios. */
392
393 p_port->mtu = (p_port->mtu < mtu) ? p_port->mtu : mtu;
394 p_port->peer_mtu = p_port->mtu;
395
396 if (p_mcb->flow == PORT_FC_CREDIT) {
397 port_get_credits(p_port, k);
398 }
399
400 if (p_port->state == PORT_STATE_OPENING)
401 RFCOMM_DlcEstablishReq(p_mcb, p_port->dlci, p_port->mtu);
402 }
403
404 /*******************************************************************************
405 *
406 * Function PORT_DlcEstablishInd
407 *
408 * Description This function is called from the RFCOMM layer when peer
409 * device wants to establish a new DLC. If this is not the
410 * first message in the establishment procedure port_handle
411 * has a handle to the port control block otherwise the control
412 * block should be found based on the muliplexer channel and
413 * dlci. The block should be allocated allocated before
414 * meaning that application already made open.
415 *
416 ******************************************************************************/
PORT_DlcEstablishInd(tRFC_MCB * p_mcb,uint8_t dlci,uint16_t mtu)417 void PORT_DlcEstablishInd(tRFC_MCB* p_mcb, uint8_t dlci, uint16_t mtu) {
418 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
419
420 RFCOMM_TRACE_DEBUG(
421 "PORT_DlcEstablishInd p_mcb:%p, dlci:%d mtu:%di, p_port:%p", p_mcb, dlci,
422 mtu, p_port);
423 RFCOMM_TRACE_DEBUG(
424 "PORT_DlcEstablishInd p_mcb addr:%02x:%02x:%02x:%02x:%02x:%02x",
425 p_mcb->bd_addr[0], p_mcb->bd_addr[1], p_mcb->bd_addr[2],
426 p_mcb->bd_addr[3], p_mcb->bd_addr[4], p_mcb->bd_addr[5]);
427
428 if (!p_port) {
429 /* This can be a first request for this port */
430 p_port = port_find_dlci_port(dlci);
431 if (!p_port) {
432 RFCOMM_DlcEstablishRsp(p_mcb, dlci, 0, RFCOMM_ERROR);
433 return;
434 }
435 p_mcb->port_inx[dlci] = p_port->inx;
436 }
437
438 /* If L2CAP's mtu less then RFCOMM's take it */
439 if (mtu && (mtu < p_port->peer_mtu)) p_port->peer_mtu = mtu;
440
441 /* If there was an inactivity timer running for MCB stop it */
442 rfc_timer_stop(p_mcb);
443
444 RFCOMM_DlcEstablishRsp(p_mcb, dlci, p_port->mtu, RFCOMM_SUCCESS);
445
446 /* This is the server side. If application wants to know when connection */
447 /* is established, thats the place */
448 if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECTED))
449 (p_port->p_callback)(PORT_EV_CONNECTED, p_port->inx);
450
451 if (p_port->p_mgmt_callback)
452 p_port->p_mgmt_callback(PORT_SUCCESS, p_port->inx);
453
454 p_port->state = PORT_STATE_OPENED;
455 }
456
457 /*******************************************************************************
458 *
459 * Function PORT_DlcEstablishCnf
460 *
461 * Description This function is called from the RFCOMM layer when peer
462 * acknowledges establish procedure (SABME/UA). Send reply
463 * to the user and set state to OPENED if result was
464 * successfull.
465 *
466 ******************************************************************************/
PORT_DlcEstablishCnf(tRFC_MCB * p_mcb,uint8_t dlci,uint16_t mtu,uint16_t result)467 void PORT_DlcEstablishCnf(tRFC_MCB* p_mcb, uint8_t dlci, uint16_t mtu,
468 uint16_t result) {
469 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
470
471 RFCOMM_TRACE_EVENT("PORT_DlcEstablishCnf dlci:%d mtu:%d result:%d", dlci, mtu,
472 result);
473
474 if (!p_port) return;
475
476 if (result != RFCOMM_SUCCESS) {
477 p_port->error = PORT_START_FAILED;
478 port_rfc_closed(p_port, PORT_START_FAILED);
479 return;
480 }
481
482 /* If L2CAP's mtu less then RFCOMM's take it */
483 if (mtu && (mtu < p_port->peer_mtu)) p_port->peer_mtu = mtu;
484
485 /* If there was an inactivity timer running for MCB stop it */
486 rfc_timer_stop(p_mcb);
487
488 if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECTED))
489 (p_port->p_callback)(PORT_EV_CONNECTED, p_port->inx);
490
491 if (p_port->p_mgmt_callback)
492 p_port->p_mgmt_callback(PORT_SUCCESS, p_port->inx);
493
494 p_port->state = PORT_STATE_OPENED;
495
496 /* RPN is required only if we want to tell DTE how the port should be opened
497 */
498 if ((p_port->uuid == UUID_SERVCLASS_DIALUP_NETWORKING) ||
499 (p_port->uuid == UUID_SERVCLASS_FAX))
500 RFCOMM_PortNegReq(p_port->rfc.p_mcb, p_port->dlci, NULL);
501 else
502 RFCOMM_ControlReq(p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
503 }
504
505 /*******************************************************************************
506 *
507 * Function PORT_PortNegInd
508 *
509 * Description This function is called from the RFCOMM layer when peer
510 * device wants to set parameters of the port. As per the spec
511 * this message has to be sent before the first data packet
512 * and can be sent before establish. The block should be
513 * allocated before meaning that application already made open.
514 *
515 ******************************************************************************/
PORT_PortNegInd(tRFC_MCB * p_mcb,uint8_t dlci,tPORT_STATE * p_pars,uint16_t param_mask)516 void PORT_PortNegInd(tRFC_MCB* p_mcb, uint8_t dlci, tPORT_STATE* p_pars,
517 uint16_t param_mask) {
518 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
519
520 RFCOMM_TRACE_EVENT("PORT_PortNegInd");
521
522 if (!p_port) {
523 /* This can be a first request for this port */
524 p_port = port_find_dlci_port(dlci);
525 if (!p_port) {
526 RFCOMM_PortNegRsp(p_mcb, dlci, p_pars, 0);
527 return;
528 }
529 p_mcb->port_inx[dlci] = p_port->inx;
530 }
531
532 /* Check if the flow control is acceptable on local side */
533 p_port->peer_port_pars = *p_pars;
534 RFCOMM_PortNegRsp(p_mcb, dlci, p_pars, param_mask);
535 }
536
537 /*******************************************************************************
538 *
539 * Function PORT_PortNegCnf
540 *
541 * Description This function is called from the RFCOMM layer to change
542 * state for the port. Propagate change to the user.
543 *
544 ******************************************************************************/
PORT_PortNegCnf(tRFC_MCB * p_mcb,uint8_t dlci,UNUSED_ATTR tPORT_STATE * p_pars,uint16_t result)545 void PORT_PortNegCnf(tRFC_MCB* p_mcb, uint8_t dlci,
546 UNUSED_ATTR tPORT_STATE* p_pars, uint16_t result) {
547 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
548
549 RFCOMM_TRACE_EVENT("PORT_PortNegCnf");
550
551 if (!p_port) {
552 RFCOMM_TRACE_WARNING("PORT_PortNegCnf no port");
553 return;
554 }
555 /* Port negotiation failed. Drop the connection */
556 if (result != RFCOMM_SUCCESS) {
557 p_port->error = PORT_PORT_NEG_FAILED;
558
559 RFCOMM_DlcReleaseReq(p_mcb, p_port->dlci);
560
561 port_rfc_closed(p_port, PORT_PORT_NEG_FAILED);
562 return;
563 }
564
565 if (!(p_port->port_ctrl & PORT_CTRL_REQ_SENT)) {
566 RFCOMM_ControlReq(p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
567 } else {
568 RFCOMM_TRACE_WARNING("PORT_PortNegCnf Control Already sent");
569 }
570 }
571
572 /*******************************************************************************
573 *
574 * Function PORT_ControlInd
575 *
576 * Description This function is called from the RFCOMM layer on the modem
577 * signal change. Propagate change to the user.
578 *
579 ******************************************************************************/
PORT_ControlInd(tRFC_MCB * p_mcb,uint8_t dlci,tPORT_CTRL * p_pars)580 void PORT_ControlInd(tRFC_MCB* p_mcb, uint8_t dlci, tPORT_CTRL* p_pars) {
581 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
582 uint32_t event;
583 uint8_t old_signals;
584
585 RFCOMM_TRACE_EVENT("PORT_ControlInd");
586
587 if (!p_port) return;
588
589 old_signals = p_port->peer_ctrl.modem_signal;
590
591 event = port_get_signal_changes(p_port, old_signals, p_pars->modem_signal);
592
593 p_port->peer_ctrl = *p_pars;
594
595 if (!(p_port->port_ctrl & PORT_CTRL_REQ_SENT))
596 RFCOMM_ControlReq(p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
597 else {
598 /* If this is the first time we received control RFCOMM is connected */
599 if (!(p_port->port_ctrl & PORT_CTRL_IND_RECEIVED)) {
600 event |= (PORT_EV_CONNECTED & p_port->ev_mask);
601 }
602
603 if (p_port->port_ctrl & PORT_CTRL_REQ_CONFIRMED) {
604 event |= port_rfc_send_tx_data(p_port);
605 }
606 }
607
608 p_port->port_ctrl |= (PORT_CTRL_IND_RECEIVED | PORT_CTRL_IND_RESPONDED);
609
610 if (p_pars->break_signal) event |= (PORT_EV_BREAK & p_port->ev_mask);
611
612 /* execute call back function only if the application is registered for events
613 */
614 if (event && p_port->p_callback) (p_port->p_callback)(event, p_port->inx);
615
616 RFCOMM_TRACE_EVENT(
617 "PORT_ControlInd DTR_DSR : %d, RTS_CTS : %d, RI : %d, DCD : %d",
618 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_DTRDSR) ? 1 : 0),
619 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_RTSCTS) ? 1 : 0),
620 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_RI) ? 1 : 0),
621 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_DCD) ? 1 : 0));
622 }
623
624 /*******************************************************************************
625 *
626 * Function PORT_ControlCnf
627 *
628 * Description This function is called from the RFCOMM layer when
629 * peer acknowleges change of the modem signals.
630 *
631 ******************************************************************************/
PORT_ControlCnf(tRFC_MCB * p_mcb,uint8_t dlci,UNUSED_ATTR tPORT_CTRL * p_pars)632 void PORT_ControlCnf(tRFC_MCB* p_mcb, uint8_t dlci,
633 UNUSED_ATTR tPORT_CTRL* p_pars) {
634 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
635 uint32_t event = 0;
636
637 RFCOMM_TRACE_EVENT("PORT_ControlCnf");
638
639 if (!p_port) return;
640
641 if (!(p_port->port_ctrl & PORT_CTRL_REQ_CONFIRMED)) {
642 p_port->port_ctrl |= PORT_CTRL_REQ_CONFIRMED;
643
644 if (p_port->port_ctrl & PORT_CTRL_IND_RECEIVED)
645 event = (p_port->ev_mask & PORT_EV_CONNECTED);
646 }
647
648 if (p_port->port_ctrl & PORT_CTRL_IND_RECEIVED) {
649 event |= port_rfc_send_tx_data(p_port);
650 }
651
652 /* execute call back function only if the application is registered for events
653 */
654 if (event && p_port->p_callback) (p_port->p_callback)(event, p_port->inx);
655 }
656
657 /*******************************************************************************
658 *
659 * Function PORT_LineStatusInd
660 *
661 * Description This function is called from the RFCOMM layer when
662 * peer indicates change in the line status
663 *
664 ******************************************************************************/
PORT_LineStatusInd(tRFC_MCB * p_mcb,uint8_t dlci,uint8_t line_status)665 void PORT_LineStatusInd(tRFC_MCB* p_mcb, uint8_t dlci, uint8_t line_status) {
666 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
667 uint32_t event = 0;
668
669 RFCOMM_TRACE_EVENT("PORT_LineStatusInd");
670
671 if (!p_port) return;
672
673 p_port->line_status |= line_status;
674
675 if (line_status & PORT_ERR_OVERRUN) event |= PORT_EV_OVERRUN;
676
677 if (line_status & PORT_ERR_BREAK) event |= PORT_EV_BREAK;
678
679 if (line_status & ~(PORT_ERR_OVERRUN | PORT_ERR_BREAK)) event |= PORT_EV_ERR;
680
681 if ((p_port->p_callback != NULL) && (p_port->ev_mask & event))
682 p_port->p_callback((p_port->ev_mask & event), p_port->inx);
683 }
684
685 /*******************************************************************************
686 *
687 * Function PORT_DlcReleaseInd
688 *
689 * Description This function is called from the RFCOMM layer when
690 * DLC connection is released.
691 *
692 ******************************************************************************/
PORT_DlcReleaseInd(tRFC_MCB * p_mcb,uint8_t dlci)693 void PORT_DlcReleaseInd(tRFC_MCB* p_mcb, uint8_t dlci) {
694 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
695
696 RFCOMM_TRACE_EVENT("PORT_DlcReleaseInd");
697
698 if (!p_port) return;
699
700 port_rfc_closed(p_port, PORT_CLOSED);
701 }
702
703 /*******************************************************************************
704 *
705 * Function PORT_CloseInd
706 *
707 * Description This function is called from the RFCOMM layer when
708 * multiplexer connection is released.
709 *
710 ******************************************************************************/
PORT_CloseInd(tRFC_MCB * p_mcb)711 void PORT_CloseInd(tRFC_MCB* p_mcb) {
712 tPORT* p_port;
713 int i;
714
715 RFCOMM_TRACE_EVENT("PORT_CloseInd");
716
717 p_port = &rfc_cb.port.port[0];
718 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
719 if (p_port->rfc.p_mcb == p_mcb) {
720 port_rfc_closed(p_port, PORT_PEER_CONNECTION_FAILED);
721 }
722 }
723 rfc_release_multiplexer_channel(p_mcb);
724 }
725
726 /*******************************************************************************
727 *
728 * Function Port_TimeOutCloseMux
729 *
730 * Description This function is called when RFCOMM timesout on a command
731 * as a result multiplexer connection is closed.
732 *
733 ******************************************************************************/
Port_TimeOutCloseMux(tRFC_MCB * p_mcb)734 void Port_TimeOutCloseMux(tRFC_MCB* p_mcb) {
735 tPORT* p_port;
736 int i;
737
738 RFCOMM_TRACE_EVENT("Port_TimeOutCloseMux");
739
740 p_port = &rfc_cb.port.port[0];
741 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
742 if (p_port->rfc.p_mcb == p_mcb) {
743 port_rfc_closed(p_port, PORT_PEER_TIMEOUT);
744 }
745 }
746 }
747
748 /*******************************************************************************
749 *
750 * Function PORT_DataInd
751 *
752 * Description This function is called from the RFCOMM layer when data
753 * buffer is received from the peer.
754 *
755 ******************************************************************************/
PORT_DataInd(tRFC_MCB * p_mcb,uint8_t dlci,BT_HDR * p_buf)756 void PORT_DataInd(tRFC_MCB* p_mcb, uint8_t dlci, BT_HDR* p_buf) {
757 tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
758 uint8_t rx_char1;
759 uint32_t events = 0;
760 uint8_t* p;
761 int i;
762
763 RFCOMM_TRACE_EVENT(
764 "PORT_DataInd with data length %d, p_mcb:%p,p_port:%p,dlci:%d",
765 p_buf->len, p_mcb, p_port, dlci);
766 if (!p_port) {
767 osi_free(p_buf);
768 return;
769 }
770 /* If client registered callout callback with flow control we can just deliver
771 * receive data */
772 if (p_port->p_data_co_callback) {
773 /* Another packet is delivered to user. Send credits to peer if required */
774 if (p_port->p_data_co_callback(p_port->inx, (uint8_t*)p_buf, -1,
775 DATA_CO_CALLBACK_TYPE_INCOMING)) {
776 port_flow_control_peer(p_port, true, 1);
777 } else {
778 port_flow_control_peer(p_port, false, 0);
779 }
780 // osi_free(p_buf);
781 return;
782 }
783 /* If client registered callback we can just deliver receive data */
784 if (p_port->p_data_callback) {
785 /* Another packet is delivered to user. Send credits to peer if required */
786 port_flow_control_peer(p_port, true, 1);
787 p_port->p_data_callback(p_port->inx, (uint8_t*)(p_buf + 1) + p_buf->offset,
788 p_buf->len);
789 osi_free(p_buf);
790 return;
791 }
792 /* Check if rx queue exceeds the limit */
793 if ((p_port->rx.queue_size + p_buf->len > PORT_RX_CRITICAL_WM) ||
794 (fixed_queue_length(p_port->rx.queue) + 1 > p_port->rx_buf_critical)) {
795 RFCOMM_TRACE_EVENT("PORT_DataInd. Buffer over run. Dropping the buffer");
796 osi_free(p_buf);
797 RFCOMM_LineStatusReq(p_mcb, dlci, LINE_STATUS_OVERRUN);
798 return;
799 }
800 /* If user registered to receive notification when a particular byte is */
801 /* received we mast check all received bytes */
802 if (((rx_char1 = p_port->user_port_pars.rx_char1) != 0) &&
803 (p_port->ev_mask & PORT_EV_RXFLAG)) {
804 for (i = 0, p = (uint8_t*)(p_buf + 1) + p_buf->offset; i < p_buf->len;
805 i++) {
806 if (*p++ == rx_char1) {
807 events |= PORT_EV_RXFLAG;
808 break;
809 }
810 }
811 }
812
813 mutex_global_lock();
814
815 fixed_queue_enqueue(p_port->rx.queue, p_buf);
816 p_port->rx.queue_size += p_buf->len;
817
818 mutex_global_unlock();
819
820 /* perform flow control procedures if necessary */
821 port_flow_control_peer(p_port, false, 0);
822
823 /* If user indicated flow control can not deliver any notifications to him */
824 if (p_port->rx.user_fc) {
825 if (events & PORT_EV_RXFLAG) {
826 p_port->rx_flag_ev_pending = true;
827 }
828 return;
829 }
830
831 events |= PORT_EV_RXCHAR;
832
833 /* Mask out all events that are not of interest to user */
834 events &= p_port->ev_mask;
835
836 if (p_port->p_callback && events) p_port->p_callback(events, p_port->inx);
837 }
838
839 /*******************************************************************************
840 *
841 * Function PORT_FlowInd
842 *
843 * Description This function is called from the RFCOMM layer on the flow
844 * control signal change. Propagate change to the user.
845 *
846 ******************************************************************************/
PORT_FlowInd(tRFC_MCB * p_mcb,uint8_t dlci,bool enable_data)847 void PORT_FlowInd(tRFC_MCB* p_mcb, uint8_t dlci, bool enable_data) {
848 tPORT* p_port = (tPORT*)NULL;
849 uint32_t events = 0;
850 int i;
851
852 RFCOMM_TRACE_EVENT("PORT_FlowInd fc:%d", enable_data);
853
854 if (dlci == 0) {
855 p_mcb->peer_ready = enable_data;
856 } else {
857 p_port = port_find_mcb_dlci_port(p_mcb, dlci);
858 if (p_port == NULL) return;
859
860 p_port->tx.peer_fc = !enable_data;
861 }
862
863 for (i = 0; i < MAX_RFC_PORTS; i++) {
864 /* If DLCI is 0 event applies to all ports */
865 if (dlci == 0) {
866 p_port = &rfc_cb.port.port[i];
867 if (!p_port->in_use || (p_port->rfc.p_mcb != p_mcb) ||
868 (p_port->rfc.state != RFC_STATE_OPENED))
869 continue;
870 }
871 events = 0;
872
873 /* Check if flow of data is still enabled */
874 events |= port_flow_control_user(p_port);
875
876 /* Check if data can be sent and send it */
877 events |= port_rfc_send_tx_data(p_port);
878
879 /* Mask out all events that are not of interest to user */
880 events &= p_port->ev_mask;
881
882 /* Send event to the application */
883 if (p_port->p_callback && events) (p_port->p_callback)(events, p_port->inx);
884
885 /* If DLCI is not 0 event applies to one port only */
886 if (dlci != 0) break;
887 }
888 }
889
890 /*******************************************************************************
891 *
892 * Function port_rfc_send_tx_data
893 *
894 * Description This function is when forward data can be sent to the peer
895 *
896 ******************************************************************************/
port_rfc_send_tx_data(tPORT * p_port)897 uint32_t port_rfc_send_tx_data(tPORT* p_port) {
898 uint32_t events = 0;
899 BT_HDR* p_buf;
900
901 /* if there is data to be sent */
902 if (p_port->tx.queue_size > 0) {
903 /* while the rfcomm peer is not flow controlling us, and peer is ready */
904 while (!p_port->tx.peer_fc && p_port->rfc.p_mcb &&
905 p_port->rfc.p_mcb->peer_ready) {
906 /* get data from tx queue and send it */
907 mutex_global_lock();
908
909 p_buf = (BT_HDR*)fixed_queue_try_dequeue(p_port->tx.queue);
910 if (p_buf != NULL) {
911 p_port->tx.queue_size -= p_buf->len;
912
913 mutex_global_unlock();
914
915 RFCOMM_TRACE_DEBUG("Sending RFCOMM_DataReq tx.queue_size=%d",
916 p_port->tx.queue_size);
917
918 RFCOMM_DataReq(p_port->rfc.p_mcb, p_port->dlci, p_buf);
919
920 events |= PORT_EV_TXCHAR;
921
922 if (p_port->tx.queue_size == 0) {
923 events |= PORT_EV_TXEMPTY;
924 break;
925 }
926 }
927 /* queue is empty-- all data sent */
928 else {
929 mutex_global_unlock();
930
931 events |= PORT_EV_TXEMPTY;
932 break;
933 }
934 }
935 /* If we flow controlled user based on the queue size enable data again */
936 events |= port_flow_control_user(p_port);
937 }
938 return (events & p_port->ev_mask);
939 }
940
941 /*******************************************************************************
942 *
943 * Function port_rfc_closed
944 *
945 * Description This function when RFCOMM side of port is closed
946 *
947 ******************************************************************************/
port_rfc_closed(tPORT * p_port,uint8_t res)948 void port_rfc_closed(tPORT* p_port, uint8_t res) {
949 uint8_t old_signals;
950 uint32_t events = 0;
951 tRFC_MCB* p_mcb = p_port->rfc.p_mcb;
952
953 if ((p_port->state == PORT_STATE_OPENING) && (p_port->is_server)) {
954 /* The servr side has not been informed that connection is up, ignore */
955 RFCOMM_TRACE_EVENT("port_rfc_closed in OPENING state ignored");
956
957 rfc_port_timer_stop(p_port);
958 p_port->rfc.state = RFC_STATE_CLOSED;
959
960 if (p_mcb) {
961 p_mcb->port_inx[p_port->dlci] = 0;
962
963 /* If there are no more ports opened on this MCB release it */
964 rfc_check_mcb_active(p_mcb);
965 p_port->rfc.p_mcb = NULL;
966 }
967
968 /* Need to restore DLCI to listening state
969 * if the server was on the initiating RFC
970 */
971 p_port->dlci &= 0xfe;
972
973 return;
974 }
975
976 if ((p_port->state != PORT_STATE_CLOSING) &&
977 (p_port->state != PORT_STATE_CLOSED)) {
978 p_port->line_status |= LINE_STATUS_FAILED;
979
980 old_signals = p_port->peer_ctrl.modem_signal;
981
982 p_port->peer_ctrl.modem_signal &=
983 ~(PORT_DTRDSR_ON | PORT_CTSRTS_ON | PORT_DCD_ON);
984
985 events |= port_get_signal_changes(p_port, old_signals,
986 p_port->peer_ctrl.modem_signal);
987
988 if (p_port->ev_mask & PORT_EV_CONNECT_ERR) events |= PORT_EV_CONNECT_ERR;
989 }
990 RFCOMM_TRACE_EVENT("port_rfc_closed state:%d sending events:%x",
991 p_port->state, events);
992
993 if ((p_port->p_callback != NULL) && events)
994 p_port->p_callback(events, p_port->inx);
995
996 if (p_port->p_mgmt_callback) p_port->p_mgmt_callback(res, p_port->inx);
997
998 p_port->rfc.state = RFC_STATE_CLOSED;
999
1000 RFCOMM_TRACE_WARNING("%s RFCOMM connection in state %d closed: %s (res: %d)",
1001 __func__, p_port->state, PORT_GetResultString(res), res);
1002
1003 port_release_port(p_port);
1004 }
1005
1006 /*******************************************************************************
1007 *
1008 * Function port_get_credits
1009 *
1010 * Description Set initial values for credits.
1011 * Adjust max number of rx credits based on negotiated MTU.
1012 * Check max allowed num of bytes, max allowed num buffers,
1013 * should be less then 255
1014 *
1015 ******************************************************************************/
port_get_credits(tPORT * p_port,uint8_t k)1016 void port_get_credits(tPORT* p_port, uint8_t k) {
1017 p_port->credit_tx = k;
1018 if (p_port->credit_tx == 0) p_port->tx.peer_fc = true;
1019 }
1020