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 "common/bt_target.h"
28 #include "stack/rfcdefs.h"
29 #include "stack/port_api.h"
30 #include "btm_int.h"
31 #include "stack/btm_api.h"
32 #include "port_int.h"
33 #include "rfc_int.h"
34 #include "common/bt_defs.h"
35 #include "osi/mutex.h"
36 #include "osi/allocator.h"
37 #if (defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE)
38 /*
39 ** Local function definitions
40 */
41 UINT32 port_rfc_send_tx_data (tPORT *p_port);
42 void port_rfc_closed (tPORT *p_port, UINT8 res);
43 void port_get_credits (tPORT *p_port, UINT8 k);
44
45
46 /*******************************************************************************
47 **
48 ** Function port_open_continue
49 **
50 ** Description This function is called after security manager completes
51 ** required security checks.
52 **
53 ** Returns void
54 **
55 *******************************************************************************/
port_open_continue(tPORT * p_port)56 int port_open_continue (tPORT *p_port)
57 {
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 if ((p_mcb = rfc_alloc_multiplexer_channel (p_port->bd_addr, TRUE)) == NULL) {
64 RFCOMM_TRACE_WARNING ("port_open_continue no mx channel");
65 port_release_port (p_port);
66 return (PORT_NO_RESOURCES);
67 }
68
69 p_port->rfc.p_mcb = p_mcb;
70
71 p_mcb->port_inx[p_port->dlci] = p_port->inx;
72
73 /* Connection is up and we know local and remote features, select MTU */
74 port_select_mtu (p_port);
75
76 if (p_mcb->state == RFC_MX_STATE_CONNECTED) {
77 RFCOMM_ParNegReq (p_mcb, p_port->dlci, p_port->mtu);
78 } else if ((p_mcb->state == RFC_MX_STATE_IDLE)
79 || (p_mcb->state == RFC_MX_STATE_DISC_WAIT_UA)) {
80 /* In RFC_MX_STATE_IDLE state, MX state machine will create connection */
81 /* In RFC_MX_STATE_DISC_WAIT_UA state, MX state machine will recreate connection */
82 /* after disconnecting is completed */
83 RFCOMM_StartReq (p_mcb);
84 } else {
85 /* MX state machine ignores RFC_MX_EVENT_START_REQ in these states */
86 /* When it enters RFC_MX_STATE_CONNECTED, it will check any openning ports */
87 RFCOMM_TRACE_DEBUG ("port_open_continue: mx state(%d) mx channel is openning", p_mcb->state);
88 }
89 return (PORT_SUCCESS);
90 }
91
92
93 /*******************************************************************************
94 **
95 ** Function port_start_control
96 **
97 ** Description This function is called in the BTU_TASK context to
98 ** send control information
99 **
100 ** Returns void
101 **
102 *******************************************************************************/
port_start_control(tPORT * p_port)103 void port_start_control (tPORT *p_port)
104 {
105 tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
106
107 if (p_mcb == NULL) {
108 return;
109 }
110
111 RFCOMM_ControlReq (p_mcb, p_port->dlci, &p_port->local_ctrl);
112 }
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 {
127 tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
128
129 if (p_mcb == NULL) {
130 return;
131 }
132
133 RFCOMM_PortNegReq (p_mcb, p_port->dlci, &p_port->user_port_pars);
134 }
135
136
137 /*******************************************************************************
138 **
139 ** Function port_start_close
140 **
141 ** Description This function is called in the BTU_TASK context to
142 ** release DLC
143 **
144 ** Returns void
145 **
146 *******************************************************************************/
port_start_close(tPORT * p_port)147 void port_start_close (tPORT *p_port)
148 {
149 tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
150 UINT8 old_signals;
151 UINT32 events = 0;
152
153 /* At first indicate to the user that signals on the connection were dropped */
154 p_port->line_status |= LINE_STATUS_FAILED;
155 old_signals = p_port->peer_ctrl.modem_signal;
156
157 p_port->peer_ctrl.modem_signal &= ~(PORT_DTRDSR_ON | PORT_CTSRTS_ON | PORT_DCD_ON);
158
159 events |= port_get_signal_changes (p_port, old_signals, p_port->peer_ctrl.modem_signal);
160
161 if (p_port->ev_mask & PORT_EV_CONNECT_ERR) {
162 events |= PORT_EV_CONNECT_ERR;
163 }
164
165 if (p_port->ev_mask & PORT_EV_ERR) {
166 events |= PORT_EV_ERR;
167 }
168
169 if ((p_port->p_callback != NULL) && events) {
170 p_port->p_callback (events, p_port->inx);
171 }
172
173
174 /* Check if RFCOMM side has been closed while the message was queued */
175 if ((p_mcb == NULL) || (p_port->rfc.state == RFC_STATE_CLOSED)) {
176 /* Call management callback function before calling port_release_port() to clear tPort */
177 if (p_port->p_mgmt_callback) {
178 p_port->p_mgmt_callback (PORT_CLOSED, p_port->inx, NULL);
179 }
180
181 port_release_port (p_port);
182 } else {
183 RFCOMM_DlcReleaseReq (p_mcb, p_port->dlci);
184 }
185 }
186
187
188 /*******************************************************************************
189 **
190 ** Function PORT_StartCnf
191 **
192 ** Description This function is called from the RFCOMM layer when
193 ** establishing of the multiplexer channel is completed.
194 ** Continue establishing of the connection for all ports that
195 ** are in the OPENING state
196 **
197 *******************************************************************************/
PORT_StartCnf(tRFC_MCB * p_mcb,UINT16 result)198 void PORT_StartCnf (tRFC_MCB *p_mcb, UINT16 result)
199 {
200 tPORT *p_port;
201 int i;
202 BOOLEAN no_ports_up = TRUE;
203
204 RFCOMM_TRACE_EVENT ("PORT_StartCnf result:%d", result);
205
206 p_port = &rfc_cb.port.port[0];
207 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
208 if (p_port->rfc.p_mcb == p_mcb) {
209 no_ports_up = FALSE;
210
211 if (result == RFCOMM_SUCCESS) {
212 RFCOMM_ParNegReq (p_mcb, p_port->dlci, p_port->mtu);
213 } else {
214 RFCOMM_TRACE_WARNING ("PORT_StartCnf failed result:%d", result);
215
216 /* Warning: result is also set to 4 when l2cap connection
217 fails due to l2cap connect cnf (no_resources) */
218 if ( result == HCI_ERR_PAGE_TIMEOUT ) {
219 p_port->error = PORT_PAGE_TIMEOUT;
220 } else {
221 p_port->error = PORT_START_FAILED;
222 }
223
224 rfc_release_multiplexer_channel (p_mcb);
225 p_port->rfc.p_mcb = NULL;
226
227 /* Send event to the application */
228 if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECT_ERR)) {
229 (p_port->p_callback)(PORT_EV_CONNECT_ERR, p_port->inx);
230 }
231
232 if (p_port->p_mgmt_callback) {
233 p_port->p_mgmt_callback (PORT_START_FAILED, p_port->inx, NULL);
234 }
235
236 port_release_port (p_port);
237 }
238 }
239 }
240
241 /* There can be a situation when after starting connection, user closes the */
242 /* port, we can catch it here to close multiplexor channel */
243 if (no_ports_up) {
244 rfc_check_mcb_active (p_mcb);
245 }
246 }
247
248
249 /*******************************************************************************
250 **
251 ** Function PORT_StartInd
252 **
253 ** Description This function is called from the RFCOMM layer when
254 ** some peer device wants to establish a multiplexer
255 ** connection. Check if there are any ports open with this
256 ** or not assigned multiplexer.
257 **
258 *******************************************************************************/
PORT_StartInd(tRFC_MCB * p_mcb)259 void PORT_StartInd (tRFC_MCB *p_mcb)
260 {
261 tPORT *p_port;
262 int i;
263
264 RFCOMM_TRACE_EVENT ("PORT_StartInd");
265
266 p_port = &rfc_cb.port.port[0];
267 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
268 if ((p_port->rfc.p_mcb == NULL)
269 || (p_port->rfc.p_mcb == p_mcb)) {
270 RFCOMM_TRACE_DEBUG("PORT_StartInd, RFCOMM_StartRsp RFCOMM_SUCCESS: p_mcb:%p", p_mcb);
271 RFCOMM_StartRsp (p_mcb, RFCOMM_SUCCESS);
272 return;
273 }
274 }
275 RFCOMM_StartRsp (p_mcb, RFCOMM_ERROR);
276 }
277
278
279 /*******************************************************************************
280 **
281 ** Function PORT_ParNegInd
282 **
283 ** Description This function is called from the RFCOMM layer to change
284 ** DLCI parameters (currently only MTU is negotiated).
285 ** If can not find the port do not accept the request.
286 ** Otherwise save the MTU size supported by the peer.
287 **
288 *******************************************************************************/
PORT_ParNegInd(tRFC_MCB * p_mcb,UINT8 dlci,UINT16 mtu,UINT8 cl,UINT8 k)289 void PORT_ParNegInd (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu, UINT8 cl, UINT8 k)
290 {
291 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
292 UINT8 our_cl;
293 UINT8 our_k;
294
295 RFCOMM_TRACE_EVENT ("PORT_ParNegInd dlci:%d mtu:%d", dlci, mtu);
296
297 if (!p_port) {
298 /* This can be a first request for this port */
299 p_port = port_find_dlci_port (dlci);
300 if (!p_port) {
301 /* If the port cannot be opened, send a DM. Per Errata 1205 */
302 rfc_send_dm(p_mcb, dlci, FALSE);
303 /* check if this is the last port open, some headsets have
304 problem, they don't disconnect if we send DM */
305 rfc_check_mcb_active( p_mcb );
306 RFCOMM_TRACE_EVENT( "PORT_ParNegInd: port not found" );
307 return;
308 }
309 p_mcb->port_inx[dlci] = p_port->inx;
310 }
311
312 memcpy (p_port->bd_addr, p_mcb->bd_addr, BD_ADDR_LEN);
313
314 /* Connection is up and we know local and remote features, select MTU */
315 port_select_mtu (p_port);
316
317 p_port->rfc.p_mcb = p_mcb;
318 p_port->mtu = (p_port->mtu < mtu) ? p_port->mtu : mtu;
319 p_port->peer_mtu = p_port->mtu;
320
321 /* Negotiate the flow control mechanism. If flow control mechanism for */
322 /* mux has not been set yet, set it now. If either we or peer wants TS 07.10, */
323 /* use that. Otherwise both must want credit based, so use that. If flow is */
324 /* already defined for this mux, we respond with that value. */
325 if (p_mcb->flow == PORT_FC_UNDEFINED) {
326 if ((PORT_FC_DEFAULT == PORT_FC_TS710) || (cl == RFCOMM_PN_CONV_LAYER_TYPE_1)) {
327 p_mcb->flow = PORT_FC_TS710;
328 } else {
329 p_mcb->flow = PORT_FC_CREDIT;
330 }
331 }
332
333 /* Regardless of our flow control mechanism, if the PN cl is zero, we must */
334 /* respond with zero. "A responding implementation must set this field to 14 */
335 /* if (and only if) the PN request was 15." This could happen if a PN is sent */
336 /* after the DLCI is already established-- the PN in that case must have cl = 0. */
337 /* See RFCOMM spec 5.5.3 */
338 if (cl == RFCOMM_PN_CONV_LAYER_TYPE_1) {
339 our_cl = RFCOMM_PN_CONV_LAYER_TYPE_1;
340 our_k = 0;
341 } else if (p_mcb->flow == PORT_FC_CREDIT) {
342 /* get credits */
343 port_get_credits (p_port, k);
344
345 /* Set convergence layer and number of credits (k) */
346 our_cl = RFCOMM_PN_CONV_LAYER_CBFC_R;
347 our_k = (p_port->credit_rx_max < RFCOMM_K_MAX) ? p_port->credit_rx_max : RFCOMM_K_MAX;
348 p_port->credit_rx = our_k;
349 } else {
350 /* must not be using credit based flow control; use TS 7.10 */
351 our_cl = RFCOMM_PN_CONV_LAYER_TYPE_1;
352 our_k = 0;
353 }
354 RFCOMM_ParNegRsp (p_mcb, dlci, p_port->mtu, our_cl, our_k);
355 }
356
357
358 /*******************************************************************************
359 **
360 ** Function PORT_ParNegCnf
361 **
362 ** Description This function is called from the RFCOMM layer to change
363 ** DLCI parameters (currently only MTU is negotiated).
364 ** Save the MTU size supported by the peer.
365 ** If the confirmation is received during the port opening
366 ** procedure send EstablishRequest to continue.
367 **
368 *******************************************************************************/
PORT_ParNegCnf(tRFC_MCB * p_mcb,UINT8 dlci,UINT16 mtu,UINT8 cl,UINT8 k)369 void PORT_ParNegCnf (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu, UINT8 cl, UINT8 k)
370 {
371 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
372
373 RFCOMM_TRACE_EVENT ("PORT_ParNegCnf dlci:%d mtu:%d cl: %d k: %d", dlci, mtu, cl, k);
374
375 if (!p_port) {
376 return;
377 }
378
379 /* Flow control mechanism not set yet. Negotiate flow control mechanism. */
380 if (p_mcb->flow == PORT_FC_UNDEFINED) {
381 /* Our stack is configured for TS07.10 and they responded with credit-based. */
382 /* This is illegal-- negotiation fails. */
383 if ((PORT_FC_DEFAULT == PORT_FC_TS710) && (cl == RFCOMM_PN_CONV_LAYER_CBFC_R)) {
384 rfc_send_disc (p_mcb, p_port->dlci);
385 rfc_port_closed (p_port);
386 return;
387 }
388 /* Our stack is configured for credit-based and they responded with credit-based. */
389 else if (cl == RFCOMM_PN_CONV_LAYER_CBFC_R) {
390 p_mcb->flow = PORT_FC_CREDIT;
391 }
392 /* They responded with any other value. Treat this as negotiation to TS07.10. */
393 else {
394 p_mcb->flow = PORT_FC_TS710;
395 }
396 }
397 /* If mux flow control mechanism set, we honor that setting regardless of */
398 /* the CL value in their response. This allows us to gracefully accept any */
399 /* illegal PN negotiation scenarios. */
400
401 p_port->mtu = (p_port->mtu < mtu) ? p_port->mtu : mtu;
402 p_port->peer_mtu = p_port->mtu;
403
404 if (p_mcb->flow == PORT_FC_CREDIT) {
405 port_get_credits (p_port, k);
406 }
407
408 if (p_port->state == PORT_STATE_OPENING) {
409 RFCOMM_DlcEstablishReq (p_mcb, p_port->dlci, p_port->mtu);
410 }
411 }
412
413
414 /*******************************************************************************
415 **
416 ** Function PORT_DlcEstablishInd
417 **
418 ** Description This function is called from the RFCOMM layer when peer
419 ** device wants to establish a new DLC. If this is not the
420 ** first message in the establishment procedure port_handle
421 ** has a handle to the port control block otherwise the control
422 ** block should be found based on the muliplexer channel and
423 ** dlci. The block should be allocated allocated before
424 ** meaning that application already made open.
425 **
426 *******************************************************************************/
PORT_DlcEstablishInd(tRFC_MCB * p_mcb,UINT8 dlci,UINT16 mtu)427 void PORT_DlcEstablishInd (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu)
428 {
429 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
430 tPORT_MGMT_CL_CALLBACK_ARG cl_mgmt_cb_arg = {0};
431 tPORT_MGMT_SR_CALLBACK_ARG sr_mgmt_cb_arg = {
432 .accept = TRUE,
433 .ignore_rfc_state = FALSE,
434 .peer_mtu = 0,
435 };
436
437 RFCOMM_TRACE_DEBUG ("PORT_DlcEstablishInd p_mcb:%p, dlci:%d mtu:%di, p_port:%p", p_mcb, dlci, mtu, p_port);
438 RFCOMM_TRACE_DEBUG ("PORT_DlcEstablishInd p_mcb addr:%02x:%02x:%02x:%02x:%02x:%02x",
439 p_mcb->bd_addr[0], p_mcb->bd_addr[1], p_mcb->bd_addr[2],
440 p_mcb->bd_addr[3], p_mcb->bd_addr[4], p_mcb->bd_addr[5]);
441
442 if (!p_port) {
443 /* This can be a first request for this port */
444 p_port = port_find_dlci_port (dlci);
445 if (!p_port) {
446 RFCOMM_DlcEstablishRsp (p_mcb, dlci, 0, RFCOMM_ERROR);
447 return;
448 }
449 p_mcb->port_inx[dlci] = p_port->inx;
450 }
451
452 /* If L2CAP's mtu less then RFCOMM's take it */
453 if (mtu && (mtu < p_port->peer_mtu)) {
454 p_port->peer_mtu = mtu;
455 }
456
457 /* If there was an inactivity timer running for MCB stop it */
458 rfc_timer_stop (p_mcb);
459
460 // RFCOMM_DlcEstablishRsp (p_mcb, dlci, p_port->mtu, RFCOMM_SUCCESS);
461
462 /* This is the server side. If application wants to know when connection */
463 /* is established, thats the place */
464 if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECTED)) {
465 (p_port->p_callback)(PORT_EV_CONNECTED, p_port->inx);
466 }
467
468 if (p_port->p_mgmt_callback) {
469 if (p_port->is_server) {
470 sr_mgmt_cb_arg.peer_mtu = p_port->peer_mtu;
471 /**
472 * @note
473 * 1. The manage callback function may change the value of accept in mgmt_cb_arg.
474 * 2. Use mgmt_cb_arg.ignore_rfc_state to work around the issue caused by sending
475 * RFCOMM establish response after the manage callback function.
476 */
477 sr_mgmt_cb_arg.ignore_rfc_state = TRUE;
478 p_port->p_mgmt_callback (PORT_SUCCESS, p_port->inx, &sr_mgmt_cb_arg);
479
480 if (!sr_mgmt_cb_arg.accept) {
481 RFCOMM_DlcEstablishRsp(p_mcb, dlci, 0, RFCOMM_LOW_RESOURCES);
482 return;
483 }
484 } else {
485 cl_mgmt_cb_arg.peer_mtu = p_port->peer_mtu;
486 p_port->p_mgmt_callback (PORT_SUCCESS, p_port->inx, &cl_mgmt_cb_arg);
487 }
488 }
489
490 RFCOMM_DlcEstablishRsp(p_mcb, dlci, p_port->mtu, RFCOMM_SUCCESS);
491 p_port->state = PORT_STATE_OPENED;
492 }
493
494
495 /*******************************************************************************
496 **
497 ** Function PORT_DlcEstablishCnf
498 **
499 ** Description This function is called from the RFCOMM layer when peer
500 ** acknowledges establish procedure (SABME/UA). Send reply
501 ** to the user and set state to OPENED if result was
502 ** successfull.
503 **
504 *******************************************************************************/
PORT_DlcEstablishCnf(tRFC_MCB * p_mcb,UINT8 dlci,UINT16 mtu,UINT16 result)505 void PORT_DlcEstablishCnf (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu, UINT16 result)
506 {
507 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
508 tPORT_MGMT_SR_CALLBACK_ARG sr_mgmt_cb_arg = {0};
509 tPORT_MGMT_CL_CALLBACK_ARG cl_mgmt_cb_arg = {0};
510
511 RFCOMM_TRACE_EVENT ("PORT_DlcEstablishCnf dlci:%d mtu:%d result:%d", dlci, mtu, result);
512
513 if (!p_port) {
514 return;
515 }
516
517 if (result != RFCOMM_SUCCESS) {
518 p_port->error = PORT_START_FAILED;
519 port_rfc_closed (p_port, PORT_START_FAILED);
520 return;
521 }
522
523 /* If L2CAP's mtu less then RFCOMM's take it */
524 if (mtu && (mtu < p_port->peer_mtu)) {
525 p_port->peer_mtu = mtu;
526 }
527
528 /* If there was an inactivity timer running for MCB stop it */
529 rfc_timer_stop (p_mcb);
530
531 if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECTED)) {
532 (p_port->p_callback)(PORT_EV_CONNECTED, p_port->inx);
533 }
534
535 if (p_port->p_mgmt_callback) {
536 if (p_port->is_server) {
537 sr_mgmt_cb_arg.peer_mtu = p_port->peer_mtu;
538 p_port->p_mgmt_callback (PORT_SUCCESS, p_port->inx, &sr_mgmt_cb_arg);
539 } else {
540 cl_mgmt_cb_arg.peer_mtu = p_port->peer_mtu;
541 p_port->p_mgmt_callback (PORT_SUCCESS, p_port->inx, &cl_mgmt_cb_arg);
542 }
543 }
544
545 p_port->state = PORT_STATE_OPENED;
546
547 /* RPN is required only if we want to tell DTE how the port should be opened */
548 if ((p_port->uuid == UUID_SERVCLASS_DIALUP_NETWORKING)
549 || (p_port->uuid == UUID_SERVCLASS_FAX)) {
550 RFCOMM_PortNegReq (p_port->rfc.p_mcb, p_port->dlci, NULL);
551 } else {
552 RFCOMM_ControlReq (p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
553 }
554 }
555
556
557 /*******************************************************************************
558 **
559 ** Function PORT_PortNegInd
560 **
561 ** Description This function is called from the RFCOMM layer when peer
562 ** device wants to set parameters of the port. As per the spec
563 ** this message has to be sent before the first data packet
564 ** and can be sent before establish. The block should be
565 ** allocated before meaning that application already made open.
566 **
567 *******************************************************************************/
PORT_PortNegInd(tRFC_MCB * p_mcb,UINT8 dlci,tPORT_STATE * p_pars,UINT16 param_mask)568 void PORT_PortNegInd (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_STATE *p_pars,
569 UINT16 param_mask)
570 {
571 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
572
573 RFCOMM_TRACE_EVENT ("PORT_PortNegInd");
574
575 if (!p_port) {
576 /* This can be a first request for this port */
577 p_port = port_find_dlci_port (dlci);
578 if (!p_port) {
579 RFCOMM_PortNegRsp (p_mcb, dlci, p_pars, 0);
580 return;
581 }
582 p_mcb->port_inx[dlci] = p_port->inx;
583 }
584
585 /* Check if the flow control is acceptable on local side */
586 p_port->peer_port_pars = *p_pars;
587 RFCOMM_PortNegRsp (p_mcb, dlci, p_pars, param_mask);
588 }
589
590
591 /*******************************************************************************
592 **
593 ** Function PORT_PortNegCnf
594 **
595 ** Description This function is called from the RFCOMM layer to change
596 ** state for the port. Propagate change to the user.
597 **
598 *******************************************************************************/
PORT_PortNegCnf(tRFC_MCB * p_mcb,UINT8 dlci,tPORT_STATE * p_pars,UINT16 result)599 void PORT_PortNegCnf (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_STATE *p_pars, UINT16 result)
600 {
601 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
602 UNUSED(p_pars);
603
604 RFCOMM_TRACE_EVENT ("PORT_PortNegCnf");
605
606 if (!p_port) {
607 RFCOMM_TRACE_WARNING ("PORT_PortNegCnf no port");
608 return;
609 }
610 /* Port negotiation failed. Drop the connection */
611 if (result != RFCOMM_SUCCESS) {
612 p_port->error = PORT_PORT_NEG_FAILED;
613
614 RFCOMM_DlcReleaseReq (p_mcb, p_port->dlci);
615
616 port_rfc_closed (p_port, PORT_PORT_NEG_FAILED);
617 return;
618 }
619
620 if (!(p_port->port_ctrl & PORT_CTRL_REQ_SENT)) {
621 RFCOMM_ControlReq (p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
622 } else {
623 RFCOMM_TRACE_WARNING ("PORT_PortNegCnf Control Already sent");
624 }
625 }
626
627
628 /*******************************************************************************
629 **
630 ** Function PORT_ControlInd
631 **
632 ** Description This function is called from the RFCOMM layer on the modem
633 ** signal change. Propagate change to the user.
634 **
635 *******************************************************************************/
PORT_ControlInd(tRFC_MCB * p_mcb,UINT8 dlci,tPORT_CTRL * p_pars)636 void PORT_ControlInd (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_CTRL *p_pars)
637 {
638 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
639 UINT32 event;
640 UINT8 old_signals;
641
642 RFCOMM_TRACE_EVENT ("PORT_ControlInd");
643
644 if (!p_port) {
645 return;
646 }
647
648 old_signals = p_port->peer_ctrl.modem_signal;
649
650 event = port_get_signal_changes (p_port, old_signals, p_pars->modem_signal);
651
652 p_port->peer_ctrl = *p_pars;
653
654 if (!(p_port->port_ctrl & PORT_CTRL_REQ_SENT)) {
655 RFCOMM_ControlReq (p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
656 } else {
657 /* If this is the first time we received control RFCOMM is connected */
658 if (!(p_port->port_ctrl & PORT_CTRL_IND_RECEIVED)) {
659 event |= (PORT_EV_CONNECTED & p_port->ev_mask);
660 }
661
662 if (p_port->port_ctrl & PORT_CTRL_REQ_CONFIRMED) {
663 event |= port_rfc_send_tx_data(p_port);
664 }
665 }
666
667 p_port->port_ctrl |= (PORT_CTRL_IND_RECEIVED | PORT_CTRL_IND_RESPONDED);
668
669 if (p_pars->break_signal) {
670 event |= (PORT_EV_BREAK & p_port->ev_mask);
671 }
672
673 /* execute call back function only if the application is registered for events */
674 if (event && p_port->p_callback) {
675 (p_port->p_callback)(event, p_port->inx);
676 }
677
678 RFCOMM_TRACE_EVENT ("PORT_ControlInd DTR_DSR : %d, RTS_CTS : %d, RI : %d, DCD : %d",
679 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_DTRDSR) ? 1 : 0),
680 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_RTSCTS) ? 1 : 0),
681 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_RI) ? 1 : 0),
682 ((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_DCD) ? 1 : 0));
683
684 }
685
686
687 /*******************************************************************************
688 **
689 ** Function PORT_ControlCnf
690 **
691 ** Description This function is called from the RFCOMM layer when
692 ** peer acknowleges change of the modem signals.
693 **
694 *******************************************************************************/
PORT_ControlCnf(tRFC_MCB * p_mcb,UINT8 dlci,tPORT_CTRL * p_pars)695 void PORT_ControlCnf (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_CTRL *p_pars)
696 {
697 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
698 UINT32 event = 0;
699 UNUSED(p_pars);
700
701 RFCOMM_TRACE_EVENT ("PORT_ControlCnf");
702
703 if (!p_port) {
704 return;
705 }
706
707 if (!(p_port->port_ctrl & PORT_CTRL_REQ_CONFIRMED)) {
708 p_port->port_ctrl |= PORT_CTRL_REQ_CONFIRMED;
709
710 if (p_port->port_ctrl & PORT_CTRL_IND_RECEIVED) {
711 event = (p_port->ev_mask & PORT_EV_CONNECTED);
712 }
713 }
714
715 if (p_port->port_ctrl & PORT_CTRL_IND_RECEIVED) {
716 event |= port_rfc_send_tx_data(p_port);
717 }
718
719 /* execute call back function only if the application is registered for events */
720 if (event && p_port->p_callback) {
721 (p_port->p_callback)(event, p_port->inx);
722 }
723 }
724
725
726 /*******************************************************************************
727 **
728 ** Function PORT_LineStatusInd
729 **
730 ** Description This function is called from the RFCOMM layer when
731 ** peer indicates change in the line status
732 **
733 *******************************************************************************/
PORT_LineStatusInd(tRFC_MCB * p_mcb,UINT8 dlci,UINT8 line_status)734 void PORT_LineStatusInd (tRFC_MCB *p_mcb, UINT8 dlci, UINT8 line_status)
735 {
736 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
737 UINT32 event = 0;
738
739 RFCOMM_TRACE_EVENT ("PORT_LineStatusInd");
740
741 if (!p_port) {
742 return;
743 }
744
745 p_port->line_status |= line_status;
746
747 if (line_status & PORT_ERR_OVERRUN) {
748 event |= PORT_EV_OVERRUN;
749 }
750
751 if (line_status & PORT_ERR_BREAK) {
752 event |= PORT_EV_BREAK;
753 }
754
755 if (line_status & ~(PORT_ERR_OVERRUN | PORT_ERR_BREAK)) {
756 event |= PORT_EV_ERR;
757 }
758
759 if ((p_port->p_callback != NULL) && (p_port->ev_mask & event)) {
760 p_port->p_callback ((p_port->ev_mask & event), p_port->inx);
761 }
762 }
763
764
765 /*******************************************************************************
766 **
767 ** Function PORT_DlcReleaseInd
768 **
769 ** Description This function is called from the RFCOMM layer when
770 ** DLC connection is released.
771 **
772 *******************************************************************************/
PORT_DlcReleaseInd(tRFC_MCB * p_mcb,UINT8 dlci)773 void PORT_DlcReleaseInd (tRFC_MCB *p_mcb, UINT8 dlci)
774 {
775 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
776
777 RFCOMM_TRACE_EVENT ("PORT_DlcReleaseInd");
778
779 if (!p_port) {
780 return;
781 }
782
783 port_rfc_closed (p_port, PORT_CLOSED);
784 }
785
786
787 /*******************************************************************************
788 **
789 ** Function PORT_CloseInd
790 **
791 ** Description This function is called from the RFCOMM layer when
792 ** multiplexer connection is released.
793 **
794 *******************************************************************************/
PORT_CloseInd(tRFC_MCB * p_mcb)795 void PORT_CloseInd (tRFC_MCB *p_mcb)
796 {
797 tPORT *p_port;
798 int i;
799
800 RFCOMM_TRACE_EVENT ("PORT_CloseInd");
801
802 p_port = &rfc_cb.port.port[0];
803 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
804 if (p_port->rfc.p_mcb == p_mcb) {
805 port_rfc_closed (p_port, PORT_PEER_CONNECTION_FAILED);
806 }
807 }
808 rfc_release_multiplexer_channel (p_mcb);
809 }
810
811 /*******************************************************************************
812 **
813 ** Function Port_TimeOutCloseMux
814 **
815 ** Description This function is called when RFCOMM timesout on a command
816 ** as a result multiplexer connection is closed.
817 **
818 *******************************************************************************/
Port_TimeOutCloseMux(tRFC_MCB * p_mcb)819 void Port_TimeOutCloseMux (tRFC_MCB *p_mcb)
820 {
821 tPORT *p_port;
822 int i;
823
824 RFCOMM_TRACE_EVENT ("Port_TimeOutCloseMux");
825
826 p_port = &rfc_cb.port.port[0];
827 for (i = 0; i < MAX_RFC_PORTS; i++, p_port++) {
828 if (p_port->rfc.p_mcb == p_mcb) {
829 port_rfc_closed (p_port, PORT_PEER_TIMEOUT);
830 }
831 }
832 }
833
834
835 /*******************************************************************************
836 **
837 ** Function PORT_DataInd
838 **
839 ** Description This function is called from the RFCOMM layer when data
840 ** buffer is received from the peer.
841 **
842 *******************************************************************************/
PORT_DataInd(tRFC_MCB * p_mcb,UINT8 dlci,BT_HDR * p_buf)843 void PORT_DataInd (tRFC_MCB *p_mcb, UINT8 dlci, BT_HDR *p_buf)
844 {
845 tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
846 UINT8 rx_char1;
847 UINT32 events = 0;
848 UINT8 *p;
849 int i;
850
851 RFCOMM_TRACE_EVENT("PORT_DataInd with data length %d, p_mcb:%p,p_port:%p,dlci:%d",
852 p_buf->len, p_mcb, p_port, dlci);
853 if (!p_port) {
854 osi_free (p_buf);
855 return;
856 }
857 /* If client registered callout callback with flow control we can just deliver receive data */
858 if (p_port->p_data_co_callback) {
859 /* Another packet is delivered to user. Send credits to peer if required */
860
861 if (p_port->p_data_co_callback(p_port->inx, (UINT8 *)p_buf, -1, DATA_CO_CALLBACK_TYPE_INCOMING)) {
862 // do nothing, flow control credits will be given upon upper-layer request;
863 // port_flow_control_peer(p_port, TRUE, 1);
864 } else {
865 port_flow_control_peer(p_port, FALSE, 0);
866 }
867 //osi_free (p_buf);
868 return;
869 } else {
870 RFCOMM_TRACE_DEBUG("PORT_DataInd, p_port:%p, p_data_co_callback is null", p_port);
871 }
872 /* If client registered callback we can just deliver receive data */
873 if (p_port->p_data_callback) {
874 /* Another packet is delivered to user. Send credits to peer if required */
875 port_flow_control_peer(p_port, TRUE, 1);
876
877 p_port->p_data_callback (p_port->inx, (UINT8 *)(p_buf + 1) + p_buf->offset, p_buf->len);
878 osi_free (p_buf);
879 return;
880 }
881
882 /* Check if rx queue exceeds the limit */
883 if ((p_port->rx.queue_size + p_buf->len > PORT_RX_CRITICAL_WM)
884 || (fixed_queue_length(p_port->rx.queue) + 1 > p_port->rx_buf_critical)) {
885 RFCOMM_TRACE_EVENT ("PORT_DataInd. Buffer over run. Dropping the buffer");
886 osi_free (p_buf);
887
888 RFCOMM_LineStatusReq (p_mcb, dlci, LINE_STATUS_OVERRUN);
889 return;
890 }
891
892 /* If user registered to receive notification when a particular byte is */
893 /* received we mast check all received bytes */
894 if (((rx_char1 = p_port->user_port_pars.rx_char1) != 0)
895 && (p_port->ev_mask & PORT_EV_RXFLAG)) {
896 for (i = 0, p = (UINT8 *)(p_buf + 1) + p_buf->offset; i < p_buf->len; i++) {
897 if (*p++ == rx_char1) {
898 events |= PORT_EV_RXFLAG;
899 break;
900 }
901 }
902 }
903
904 osi_mutex_global_lock();
905
906 fixed_queue_enqueue(p_port->rx.queue, p_buf, FIXED_QUEUE_MAX_TIMEOUT);
907 p_port->rx.queue_size += p_buf->len;
908
909 osi_mutex_global_unlock();
910
911 /* perform flow control procedures if necessary */
912 port_flow_control_peer(p_port, FALSE, 0);
913
914 /* If user indicated flow control can not deliver any notifications to him */
915 if (p_port->rx.user_fc) {
916 if (events & PORT_EV_RXFLAG) {
917 p_port->rx_flag_ev_pending = TRUE;
918 }
919
920 return;
921 }
922
923 events |= PORT_EV_RXCHAR;
924
925 /* Mask out all events that are not of interest to user */
926 events &= p_port->ev_mask;
927
928 if (p_port->p_callback && events) {
929 p_port->p_callback (events, p_port->inx);
930 }
931 }
932
933
934 /*******************************************************************************
935 **
936 ** Function PORT_FlowInd
937 **
938 ** Description This function is called from the RFCOMM layer on the flow
939 ** control signal change. Propagate change to the user.
940 **
941 *******************************************************************************/
PORT_FlowInd(tRFC_MCB * p_mcb,UINT8 dlci,BOOLEAN enable_data)942 void PORT_FlowInd (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN enable_data)
943 {
944 tPORT *p_port = (tPORT *)NULL;
945 UINT32 events = 0;
946 int i;
947
948 RFCOMM_TRACE_EVENT ("PORT_FlowInd fc:%d", enable_data);
949
950 if (dlci == 0) {
951 p_mcb->peer_ready = enable_data;
952 } else {
953 if ((p_port = port_find_mcb_dlci_port (p_mcb, dlci)) == NULL) {
954 return;
955 }
956
957 p_port->tx.peer_fc = !enable_data;
958 }
959
960 for (i = 0; i < MAX_RFC_PORTS; i++) {
961 /* If DLCI is 0 event applies to all ports */
962 if (dlci == 0) {
963 p_port = &rfc_cb.port.port[i];
964 if (!p_port->in_use
965 || (p_port->rfc.p_mcb != p_mcb)
966 || (p_port->rfc.state != RFC_STATE_OPENED)) {
967 continue;
968 }
969 }
970 events = 0;
971
972 /* Check if flow of data is still enabled */
973 events |= port_flow_control_user (p_port);
974
975 /* Check if data can be sent and send it */
976 events |= port_rfc_send_tx_data (p_port);
977
978 /* Mask out all events that are not of interest to user */
979 events &= p_port->ev_mask;
980
981 /* Send event to the application */
982 if (p_port->p_callback && events) {
983 (p_port->p_callback)(events, p_port->inx);
984 }
985
986 /* If DLCI is not 0 event applies to one port only */
987 if (dlci != 0) {
988 break;
989 }
990 }
991 }
992
993
994 /*******************************************************************************
995 **
996 ** Function port_rfc_send_tx_data
997 **
998 ** Description This function is when forward data can be sent to the peer
999 **
1000 *******************************************************************************/
port_rfc_send_tx_data(tPORT * p_port)1001 UINT32 port_rfc_send_tx_data (tPORT *p_port)
1002 {
1003 UINT32 events = 0;
1004 BT_HDR *p_buf;
1005
1006 /* if there is data to be sent */
1007 if (p_port->tx.queue_size > 0) {
1008 /* while the rfcomm peer is not flow controlling us, and peer is ready */
1009 while (!p_port->tx.peer_fc && p_port->rfc.p_mcb && p_port->rfc.p_mcb->peer_ready) {
1010 /* get data from tx queue and send it */
1011 osi_mutex_global_lock();
1012
1013 if ((p_buf = (BT_HDR *)fixed_queue_dequeue(p_port->tx.queue, 0)) != NULL) {
1014 p_port->tx.queue_size -= p_buf->len;
1015
1016 osi_mutex_global_unlock();
1017
1018 RFCOMM_TRACE_DEBUG ("Sending RFCOMM_DataReq tx.queue_size=%d", p_port->tx.queue_size);
1019
1020 RFCOMM_DataReq (p_port->rfc.p_mcb, p_port->dlci, p_buf);
1021
1022 events |= PORT_EV_TXCHAR;
1023
1024 if (p_port->tx.queue_size == 0) {
1025 events |= PORT_EV_TXEMPTY;
1026 break;
1027 }
1028 }
1029 /* queue is empty-- all data sent */
1030 else {
1031 osi_mutex_global_unlock();
1032
1033 events |= PORT_EV_TXEMPTY;
1034 break;
1035 }
1036 }
1037 /* If we flow controlled user based on the queue size enable data again */
1038 events |= port_flow_control_user (p_port);
1039 }
1040 return (events & p_port->ev_mask);
1041 }
1042
1043
1044 /*******************************************************************************
1045 **
1046 ** Function port_rfc_closed
1047 **
1048 ** Description This function when RFCOMM side of port is closed
1049 **
1050 *******************************************************************************/
port_rfc_closed(tPORT * p_port,UINT8 res)1051 void port_rfc_closed (tPORT *p_port, UINT8 res)
1052 {
1053 UINT8 old_signals;
1054 UINT32 events = 0;
1055 tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
1056
1057 if ((p_port->state == PORT_STATE_OPENING) && (p_port->is_server)) {
1058 /* The servr side has not been informed that connection is up, ignore */
1059 RFCOMM_TRACE_EVENT ("port_rfc_closed in OPENING state ignored");
1060
1061 rfc_port_timer_stop (p_port);
1062 p_port->rfc.state = RFC_STATE_CLOSED;
1063
1064 if (p_mcb) {
1065 p_mcb->port_inx[p_port->dlci] = 0;
1066
1067 /* If there are no more ports opened on this MCB release it */
1068 rfc_check_mcb_active (p_mcb);
1069 p_port->rfc.p_mcb = NULL;
1070 }
1071
1072 /* Need to restore DLCI to listening state
1073 * if the server was on the initiating RFC
1074 */
1075 p_port->dlci &= 0xfe;
1076
1077 return;
1078 }
1079
1080 if ((p_port->state != PORT_STATE_CLOSING) && (p_port->state != PORT_STATE_CLOSED)) {
1081 p_port->line_status |= LINE_STATUS_FAILED;
1082
1083 old_signals = p_port->peer_ctrl.modem_signal;
1084
1085 p_port->peer_ctrl.modem_signal &= ~(PORT_DTRDSR_ON | PORT_CTSRTS_ON | PORT_DCD_ON);
1086
1087 events |= port_get_signal_changes (p_port, old_signals, p_port->peer_ctrl.modem_signal);
1088
1089 if (p_port->ev_mask & PORT_EV_CONNECT_ERR) {
1090 events |= PORT_EV_CONNECT_ERR;
1091 }
1092 }
1093 RFCOMM_TRACE_EVENT ("port_rfc_closed state:%d sending events:%x", p_port->state, events);
1094
1095 if ((p_port->p_callback != NULL) && events) {
1096 p_port->p_callback (events, p_port->inx);
1097 }
1098
1099 if (p_port->p_mgmt_callback && !(p_port->state == PORT_STATE_CLOSED && p_port->is_server)) {
1100 p_port->p_mgmt_callback(res, p_port->inx, NULL);
1101 }
1102
1103 p_port->rfc.state = RFC_STATE_CLOSED;
1104
1105 RFCOMM_TRACE_WARNING("%s RFCOMM connection in server:%d state %d closed: %s (res: %d)",
1106 __func__, p_port->is_server, p_port->state, PORT_GetResultString(res),
1107 res);
1108
1109 port_release_port (p_port);
1110 }
1111
1112
1113 /*******************************************************************************
1114 **
1115 ** Function port_get_credits
1116 **
1117 ** Description Set initial values for credits.
1118 ** Adjust max number of rx credits based on negotiated MTU.
1119 ** Check max allowed num of bytes, max allowed num buffers,
1120 ** should be less then 255
1121 **
1122 *******************************************************************************/
port_get_credits(tPORT * p_port,UINT8 k)1123 void port_get_credits (tPORT *p_port, UINT8 k)
1124 {
1125 p_port->credit_tx = k;
1126 if (p_port->credit_tx == 0) {
1127 p_port->tx.peer_fc = TRUE;
1128 }
1129 }
1130
1131
1132 #endif ///(defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE)
1133
