avrc_api.c revision 6dae552ef8d82b30fa66efab9c6f75644a805bbe
1/****************************************************************************** 2 * 3 * Copyright (C) 2003-2012 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 * Interface to AVRCP mandatory commands 22 * 23 ******************************************************************************/ 24#include <string.h> 25 26#include "gki.h" 27#include "avrc_api.h" 28#include "avrc_int.h" 29#include "wcassert.h" 30 31/***************************************************************************** 32** Global data 33*****************************************************************************/ 34 35 36#define AVRC_MAX_RCV_CTRL_EVT AVCT_BROWSE_UNCONG_IND_EVT 37 38static const UINT8 avrc_ctrl_event_map[] = 39{ 40 AVRC_OPEN_IND_EVT, /* AVCT_CONNECT_CFM_EVT */ 41 AVRC_OPEN_IND_EVT, /* AVCT_CONNECT_IND_EVT */ 42 AVRC_CLOSE_IND_EVT, /* AVCT_DISCONNECT_CFM_EVT */ 43 AVRC_CLOSE_IND_EVT, /* AVCT_DISCONNECT_IND_EVT */ 44 AVRC_CONG_IND_EVT, /* AVCT_CONG_IND_EVT */ 45 AVRC_UNCONG_IND_EVT,/* AVCT_UNCONG_IND_EVT */ 46 AVRC_BROWSE_OPEN_IND_EVT, /* AVCT_BROWSE_CONN_CFM_EVT */ 47 AVRC_BROWSE_OPEN_IND_EVT, /* AVCT_BROWSE_CONN_IND_EVT */ 48 AVRC_BROWSE_CLOSE_IND_EVT, /* AVCT_BROWSE_DISCONN_CFM_EVT */ 49 AVRC_BROWSE_CLOSE_IND_EVT, /* AVCT_BROWSE_DISCONN_IND_EVT */ 50 AVRC_BROWSE_CONG_IND_EVT, /* AVCT_BROWSE_CONG_IND_EVT */ 51 AVRC_BROWSE_UNCONG_IND_EVT /* AVCT_BROWSE_UNCONG_IND_EVT */ 52}; 53 54#define AVRC_OP_DROP 0xFE /* use this unused opcode to indication no need to call the callback function */ 55#define AVRC_OP_DROP_N_FREE 0xFD /* use this unused opcode to indication no need to call the callback function & free buffer */ 56 57/****************************************************************************** 58** 59** Function avrc_ctrl_cback 60** 61** Description This is the callback function used by AVCTP to report 62** received link events. 63** 64** Returns Nothing. 65** 66******************************************************************************/ 67static void avrc_ctrl_cback(UINT8 handle, UINT8 event, UINT16 result, 68 BD_ADDR peer_addr) 69{ 70 UINT8 avrc_event; 71 72 if (event <= AVRC_MAX_RCV_CTRL_EVT && avrc_cb.ccb[handle].p_ctrl_cback) 73 { 74 avrc_event = avrc_ctrl_event_map[event]; 75 if (event == AVCT_CONNECT_CFM_EVT) 76 { 77 if (result != 0) /* failed */ 78 avrc_event = AVRC_CLOSE_IND_EVT; 79 } 80 (*avrc_cb.ccb[handle].p_ctrl_cback)(handle, avrc_event, result, peer_addr); 81 } 82 /* else drop the unknown event*/ 83} 84 85/****************************************************************************** 86** 87** Function avrc_get_data_ptr 88** 89** Description If the offset in the received buffer is smaller than required 90** move the portion of data AVRC cares. 91** 92** Returns Nothing. 93** 94******************************************************************************/ 95static UINT8 * avrc_get_data_ptr(BT_HDR *p_pkt) 96{ 97 UINT8 *p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 98 int i, gap; 99 100 if (p_pkt->offset < AVCT_MSG_OFFSET) 101 { 102 gap = AVCT_MSG_OFFSET - p_pkt->offset; 103 for(i=p_pkt->len; i>0; i--) 104 { 105 *(p_data + i + gap) = *(p_data + i); 106 } 107 p_pkt->offset += gap; 108 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 109 } 110 *p_data = AVRC_RSP_IMPL_STBL; 111 return p_data; 112} 113 114#if (AVRC_METADATA_INCLUDED == TRUE) 115/****************************************************************************** 116** 117** Function avrc_prep_end_frag 118** 119** Description This function prepares an end response fragment 120** 121** Returns Nothing. 122** 123******************************************************************************/ 124static void avrc_prep_end_frag(UINT8 handle) 125{ 126 tAVRC_FRAG_CB *p_fcb; 127 BT_HDR *p_pkt_new; 128 UINT8 *p_data, *p_orig_data; 129 UINT8 rsp_type; 130 131 AVRC_TRACE_DEBUG0 ("avrc_prep_end_frag" ); 132 p_fcb = &avrc_cb.fcb[handle]; 133 134 /* The response type of the end fragment should be the same as the the PDU of "End Fragment 135 ** Response" Errata: https://www.bluetooth.org/errata/errata_view.cfm?errata_id=4383 136 */ 137 p_orig_data = ((UINT8 *)(p_fcb->p_fmsg + 1) + p_fcb->p_fmsg->offset); 138 rsp_type = ((*p_orig_data) & AVRC_CTYPE_MASK); 139 140 p_pkt_new = p_fcb->p_fmsg; 141 p_pkt_new->len -= (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE); 142 p_pkt_new->offset += (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE); 143 p_data = (UINT8 *)(p_pkt_new+1) + p_pkt_new->offset; 144 *p_data++ = rsp_type; 145 *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); 146 *p_data++ = AVRC_OP_VENDOR; 147 AVRC_CO_ID_TO_BE_STREAM(p_data, AVRC_CO_METADATA); 148 *p_data++ = p_fcb->frag_pdu; 149 *p_data++ = AVRC_PKT_END; 150 151 /* 4=pdu, pkt_type & len */ 152 UINT16_TO_BE_STREAM(p_data, (p_pkt_new->len - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE)); 153} 154 155/****************************************************************************** 156** 157** Function avrc_send_continue_frag 158** 159** Description This function sends a continue response fragment 160** 161** Returns Nothing. 162** 163******************************************************************************/ 164static void avrc_send_continue_frag(UINT8 handle, UINT8 label) 165{ 166 tAVRC_FRAG_CB *p_fcb; 167 BT_HDR *p_pkt_old, *p_pkt; 168 UINT8 *p_old, *p_data; 169 UINT8 cr = AVCT_RSP; 170 tAVRC_RSP rej_rsp; 171 172 p_fcb = &avrc_cb.fcb[handle]; 173 p_pkt = p_fcb->p_fmsg; 174 175 AVRC_TRACE_DEBUG1 ("avrc_send_continue_frag len(%d) / AVRC_MAX_CTRL_DATA_LEN", p_pkt->len ); 176 if (p_pkt->len > AVRC_MAX_CTRL_DATA_LEN) 177 { 178 p_pkt_old = p_fcb->p_fmsg; 179 p_pkt = (BT_HDR *)GKI_getbuf((UINT16)(AVRC_PACKET_LEN + AVCT_MSG_OFFSET + BT_HDR_SIZE)); 180 if (p_pkt) 181 { 182 p_pkt->len = AVRC_MAX_CTRL_DATA_LEN; 183 p_pkt->offset = AVCT_MSG_OFFSET; 184 p_pkt->layer_specific = p_pkt_old->layer_specific; 185 p_pkt->event = p_pkt_old->event; 186 p_old = (UINT8 *)(p_pkt_old+1) + p_pkt_old->offset; 187 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 188 memcpy (p_data, p_old, AVRC_MAX_CTRL_DATA_LEN); 189 /* use AVRC continue packet type */ 190 p_data += AVRC_VENDOR_HDR_SIZE; 191 p_data++; /* pdu */ 192 *p_data++ = AVRC_PKT_CONTINUE; 193 /* 4=pdu, pkt_type & len */ 194 UINT16_TO_BE_STREAM(p_data, (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - 4)); 195 196 /* prepare the left over for as an end fragment */ 197 avrc_prep_end_frag (handle); 198 } 199 else 200 { 201 /* use the current GKI buffer to send Internal error status */ 202 p_pkt = p_fcb->p_fmsg; 203 p_fcb->p_fmsg = NULL; 204 p_fcb->frag_enabled = FALSE; 205 AVRC_TRACE_ERROR0 ("AVRC_MsgReq no buffers for fragmentation - send internal error" ); 206 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 207 *p_data++ = AVRC_PDU_REQUEST_CONTINUATION_RSP; 208 *p_data++ = 0; 209 UINT16_TO_BE_STREAM(p_data, 0); 210 p_pkt->len = 4; 211 rej_rsp.pdu = AVRC_PDU_REQUEST_CONTINUATION_RSP; 212 rej_rsp.status = AVRC_STS_INTERNAL_ERR; 213 AVRC_BldResponse( handle, (tAVRC_RESPONSE *)&rej_rsp, &p_pkt); 214 cr = AVCT_RSP; 215 } 216 } 217 else 218 { 219 /* end fragment. clean the control block */ 220 p_fcb->frag_enabled = FALSE; 221 p_fcb->p_fmsg = NULL; 222 } 223 AVCT_MsgReq( handle, label, cr, p_pkt); 224} 225 226/****************************************************************************** 227** 228** Function avrc_proc_vendor_command 229** 230** Description This function processes received vendor command. 231** 232** Returns if not NULL, the response to send right away. 233** 234******************************************************************************/ 235static BT_HDR * avrc_proc_vendor_command(UINT8 handle, UINT8 label, 236 BT_HDR *p_pkt, tAVRC_MSG_VENDOR *p_msg) 237{ 238 BT_HDR *p_rsp = NULL; 239 UINT8 *p_data; 240 UINT8 *p_begin; 241 UINT8 pkt_type; 242 BOOLEAN abort_frag = FALSE; 243 tAVRC_STS status = AVRC_STS_NO_ERROR; 244 tAVRC_FRAG_CB *p_fcb; 245 246 p_begin = (UINT8 *)(p_pkt+1) + p_pkt->offset; 247 p_data = p_begin + AVRC_VENDOR_HDR_SIZE; 248 pkt_type = *(p_data + 1) & AVRC_PKT_TYPE_MASK; 249 250 if (pkt_type != AVRC_PKT_SINGLE) 251 { 252 /* reject - commands can only be in single packets at AVRCP level */ 253 AVRC_TRACE_ERROR1 ("commands must be in single packet pdu:0x%x", *p_data ); 254 /* use the current GKI buffer to send the reject */ 255 status = AVRC_STS_BAD_CMD; 256 } 257 /* check if there are fragments waiting to be sent */ 258 else if (avrc_cb.fcb[handle].frag_enabled) 259 { 260 p_fcb = &avrc_cb.fcb[handle]; 261 if (p_msg->company_id == AVRC_CO_METADATA) 262 { 263 switch (*p_data) 264 { 265 case AVRC_PDU_ABORT_CONTINUATION_RSP: 266 /* aborted by CT - send accept response */ 267 abort_frag = TRUE; 268 p_begin = (UINT8 *)(p_pkt+1) + p_pkt->offset; 269 *p_begin = (AVRC_RSP_ACCEPT & AVRC_CTYPE_MASK); 270 if (*(p_data + 4) != p_fcb->frag_pdu) 271 { 272 *p_begin = (AVRC_RSP_REJ & AVRC_CTYPE_MASK); 273 *(p_data + 4) = AVRC_STS_BAD_PARAM; 274 } 275 else 276 { 277 p_data = (p_begin + AVRC_VENDOR_HDR_SIZE + 2); 278 UINT16_TO_BE_STREAM(p_data, 0); 279 p_pkt->len = (p_data - p_begin); 280 } 281 AVCT_MsgReq( handle, label, AVCT_RSP, p_pkt); 282 p_msg->hdr.opcode = AVRC_OP_DROP; /* used the p_pkt to send response */ 283 break; 284 285 case AVRC_PDU_REQUEST_CONTINUATION_RSP: 286 if (*(p_data + 4) == p_fcb->frag_pdu) 287 { 288 avrc_send_continue_frag(handle, label); 289 p_msg->hdr.opcode = AVRC_OP_DROP_N_FREE; 290 } 291 else 292 { 293 /* the pdu id does not match - reject the command using the current GKI buffer */ 294 AVRC_TRACE_ERROR2("avrc_proc_vendor_command continue pdu: 0x%x does not match \ 295 current re-assembly pdu: 0x%x", 296 *(p_data + 4), p_fcb->frag_pdu); 297 status = AVRC_STS_BAD_PARAM; 298 abort_frag = TRUE; 299 } 300 break; 301 302 default: 303 /* implicit abort */ 304 abort_frag = TRUE; 305 } 306 } 307 else 308 { 309 abort_frag = TRUE; 310 /* implicit abort */ 311 } 312 313 if (abort_frag) 314 { 315 if (p_fcb->p_fmsg) 316 GKI_freebuf(p_fcb->p_fmsg); 317 p_fcb->p_fmsg = NULL; 318 p_fcb->frag_enabled = FALSE; 319 } 320 } 321 322 if (status != AVRC_STS_NO_ERROR) 323 { 324 /* use the current GKI buffer to build/send the reject message */ 325 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 326 *p_data++ = AVRC_RSP_REJ; 327 p_data += AVRC_VENDOR_HDR_SIZE; /* pdu */ 328 *p_data++ = 0; /* pkt_type */ 329 UINT16_TO_BE_STREAM(p_data, 1); /* len */ 330 *p_data++ = status; /* error code */ 331 p_pkt->len = AVRC_VENDOR_HDR_SIZE + 5; 332 p_rsp = p_pkt; 333 } 334 335 return p_rsp; 336} 337 338/****************************************************************************** 339** 340** Function avrc_proc_far_msg 341** 342** Description This function processes metadata fragmenation 343** and reassembly 344** 345** Returns 0, to report the message with msg_cback . 346** 347******************************************************************************/ 348static UINT8 avrc_proc_far_msg(UINT8 handle, UINT8 label, UINT8 cr, BT_HDR **pp_pkt, 349 tAVRC_MSG_VENDOR *p_msg) 350{ 351 BT_HDR *p_pkt = *pp_pkt; 352 UINT8 *p_data; 353 BOOLEAN drop = FALSE; 354 BT_HDR *p_rsp = NULL; 355 BT_HDR *p_cmd = NULL; 356 BOOLEAN req_continue = FALSE; 357 BT_HDR *p_pkt_new = NULL; 358 UINT8 pkt_type; 359 UINT16 buf_len; 360 tAVRC_RASM_CB *p_rcb; 361 tAVRC_NEXT_CMD avrc_cmd; 362 363 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 364 365 /* Skip over vendor header (ctype, subunit*, opcode, CO_ID) */ 366 p_data += AVRC_VENDOR_HDR_SIZE; 367 368 pkt_type = *(p_data + 1) & AVRC_PKT_TYPE_MASK; 369 AVRC_TRACE_DEBUG1 ("pkt_type %d", pkt_type ); 370 p_rcb = &avrc_cb.rcb[handle]; 371 if (p_msg->company_id == AVRC_CO_METADATA) 372 { 373 /* check if the message needs to be re-assembled */ 374 if (pkt_type == AVRC_PKT_SINGLE || pkt_type == AVRC_PKT_START) 375 { 376 /* previous fragments need to be dropped, when received another new message */ 377 p_rcb->rasm_offset = 0; 378 if (p_rcb->p_rmsg) 379 { 380 GKI_freebuf(p_rcb->p_rmsg); 381 p_rcb->p_rmsg = NULL; 382 } 383 } 384 385 if (pkt_type != AVRC_PKT_SINGLE && cr == AVCT_RSP) 386 { 387 /* not a single response packet - need to re-assemble metadata messages */ 388 if (pkt_type == AVRC_PKT_START) 389 { 390 /* Allocate buffer for re-assembly */ 391 p_rcb->rasm_pdu = *p_data; 392 if ((p_rcb->p_rmsg = (BT_HDR *)GKI_getbuf(GKI_MAX_BUF_SIZE)) != NULL) 393 { 394 /* Copy START packet to buffer for re-assembling fragments*/ 395 memcpy(p_rcb->p_rmsg, p_pkt, sizeof(BT_HDR)); /* Copy bt hdr */ 396 397 /* Copy metadata message */ 398 memcpy((UINT8 *)(p_rcb->p_rmsg + 1), 399 (UINT8 *)(p_pkt+1) + p_pkt->offset, p_pkt->len); 400 401 /* offset of start of metadata response in reassembly buffer */ 402 p_rcb->p_rmsg->offset = p_rcb->rasm_offset = 0; 403 404 /* Free original START packet, replace with pointer to reassembly buffer */ 405 GKI_freebuf(p_pkt); 406 *pp_pkt = p_rcb->p_rmsg; 407 } 408 else 409 { 410 /* Unable to allocate buffer for fragmented avrc message. Reuse START 411 buffer for reassembly (re-assembled message may fit into ACL buf) */ 412 AVRC_TRACE_DEBUG0 ("Unable to allocate buffer for fragmented avrc message, \ 413 reusing START buffer for reassembly"); 414 p_rcb->rasm_offset = p_pkt->offset; 415 p_rcb->p_rmsg = p_pkt; 416 } 417 418 /* set offset to point to where to copy next - use the same re-asm logic as AVCT */ 419 p_rcb->p_rmsg->offset += p_rcb->p_rmsg->len; 420 req_continue = TRUE; 421 } 422 else if (p_rcb->p_rmsg == NULL) 423 { 424 /* Received a CONTINUE/END, but no corresponding START 425 (or previous fragmented response was dropped) */ 426 AVRC_TRACE_DEBUG0 ("Received a CONTINUE/END without no corresponding START \ 427 (or previous fragmented response was dropped)"); 428 drop = 5; 429 GKI_freebuf(p_pkt); 430 *pp_pkt = NULL; 431 } 432 else 433 { 434 /* get size of buffer holding assembled message */ 435 buf_len = GKI_get_buf_size (p_rcb->p_rmsg) - sizeof(BT_HDR); 436 /* adjust offset and len of fragment for header byte */ 437 p_pkt->offset += (AVRC_VENDOR_HDR_SIZE + AVRC_MIN_META_HDR_SIZE); 438 p_pkt->len -= (AVRC_VENDOR_HDR_SIZE + AVRC_MIN_META_HDR_SIZE); 439 /* verify length */ 440 if ((p_rcb->p_rmsg->offset + p_pkt->len) > buf_len) 441 { 442 AVRC_TRACE_WARNING0("Fragmented message too big! - report the partial message"); 443 p_pkt->len = buf_len - p_rcb->p_rmsg->offset; 444 pkt_type = AVRC_PKT_END; 445 } 446 447 /* copy contents of p_pkt to p_rx_msg */ 448 memcpy((UINT8 *)(p_rcb->p_rmsg + 1) + p_rcb->p_rmsg->offset, 449 (UINT8 *)(p_pkt + 1) + p_pkt->offset, p_pkt->len); 450 451 if (pkt_type == AVRC_PKT_END) 452 { 453 p_rcb->p_rmsg->offset = p_rcb->rasm_offset; 454 p_rcb->p_rmsg->len += p_pkt->len; 455 p_pkt_new = p_rcb->p_rmsg; 456 p_rcb->rasm_offset = 0; 457 p_rcb->p_rmsg = NULL; 458 p_msg->p_vendor_data = (UINT8 *)(p_pkt_new+1) + p_pkt_new->offset; 459 p_msg->hdr.ctype = p_msg->p_vendor_data[0] & AVRC_CTYPE_MASK; 460 /* 6 = ctype, subunit*, opcode & CO_ID */ 461 p_msg->p_vendor_data += AVRC_VENDOR_HDR_SIZE; 462 p_msg->vendor_len = p_pkt_new->len - AVRC_VENDOR_HDR_SIZE; 463 p_data = p_msg->p_vendor_data + 1; /* skip pdu */ 464 *p_data++ = AVRC_PKT_SINGLE; 465 UINT16_TO_BE_STREAM(p_data, (p_msg->vendor_len - AVRC_MIN_META_HDR_SIZE)); 466 AVRC_TRACE_DEBUG3("end frag:%d, total len:%d, offset:%d", p_pkt->len, 467 p_pkt_new->len, p_pkt_new->offset); 468 } 469 else 470 { 471 p_rcb->p_rmsg->offset += p_pkt->len; 472 p_rcb->p_rmsg->len += p_pkt->len; 473 p_pkt_new = NULL; 474 req_continue = TRUE; 475 } 476 GKI_freebuf(p_pkt); 477 *pp_pkt = p_pkt_new; 478 } 479 } 480 481 if (cr == AVCT_CMD) 482 { 483 p_rsp = avrc_proc_vendor_command(handle, label, *pp_pkt, p_msg); 484 if (p_rsp) 485 { 486 AVCT_MsgReq( handle, label, AVCT_RSP, p_rsp); 487 drop = 3; 488 } 489 else if (p_msg->hdr.opcode == AVRC_OP_DROP) 490 { 491 drop = 1; 492 } 493 else if (p_msg->hdr.opcode == AVRC_OP_DROP_N_FREE) 494 drop = 4; 495 496 } 497 else if (cr == AVCT_RSP && req_continue == TRUE) 498 { 499 avrc_cmd.pdu = AVRC_PDU_REQUEST_CONTINUATION_RSP; 500 avrc_cmd.status = AVRC_STS_NO_ERROR; 501 avrc_cmd.target_pdu = p_rcb->rasm_pdu; 502 if (AVRC_BldCommand ((tAVRC_COMMAND *)&avrc_cmd, &p_cmd) == AVRC_STS_NO_ERROR) 503 { 504 drop = 2; 505 AVRC_MsgReq (handle, (UINT8)(label), AVRC_CMD_CTRL, p_cmd); 506 } 507 } 508 } 509 510 return drop; 511} 512#endif /* (AVRC_METADATA_INCLUDED == TRUE) */ 513 514/****************************************************************************** 515** 516** Function avrc_msg_cback 517** 518** Description This is the callback function used by AVCTP to report 519** received AV control messages. 520** 521** Returns Nothing. 522** 523******************************************************************************/ 524static void avrc_msg_cback(UINT8 handle, UINT8 label, UINT8 cr, 525 BT_HDR *p_pkt) 526{ 527 UINT8 opcode; 528 tAVRC_MSG msg; 529 UINT8 *p_data; 530 UINT8 *p_begin; 531 UINT8 drop = 0; 532 BOOLEAN free = TRUE; 533 BT_HDR *p_rsp = NULL; 534 UINT8 *p_rsp_data; 535 int xx; 536 BOOLEAN reject = FALSE; 537#if (BT_USE_TRACES == TRUE) 538 char *p_drop_msg = "dropped"; 539#endif 540 tAVRC_MSG_VENDOR *p_msg = &msg.vendor; 541 542 if (cr == AVCT_CMD && 543 (p_pkt->layer_specific & AVCT_DATA_CTRL && AVRC_PACKET_LEN < sizeof(p_pkt->len))) 544 { 545 /* Ignore the invalid AV/C command frame */ 546#if (BT_USE_TRACES == TRUE) 547 p_drop_msg = "dropped - too long AV/C cmd frame size"; 548#endif 549 GKI_freebuf(p_pkt); 550 return; 551 } 552 553 if (cr == AVCT_REJ) 554 { 555 /* The peer thinks that this PID is no longer open - remove this handle */ 556 /* */ 557 GKI_freebuf(p_pkt); 558 AVCT_RemoveConn(handle); 559 return; 560 } 561 562 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 563 memset(&msg, 0, sizeof(tAVRC_MSG) ); 564 { 565 msg.hdr.ctype = p_data[0] & AVRC_CTYPE_MASK; 566 AVRC_TRACE_DEBUG4("avrc_msg_cback handle:%d, ctype:%d, offset:%d, len: %d", 567 handle, msg.hdr.ctype, p_pkt->offset, p_pkt->len); 568 msg.hdr.subunit_type = (p_data[1] & AVRC_SUBTYPE_MASK) >> AVRC_SUBTYPE_SHIFT; 569 msg.hdr.subunit_id = p_data[1] & AVRC_SUBID_MASK; 570 opcode = p_data[2]; 571 } 572 573 if ( ((avrc_cb.ccb[handle].control & AVRC_CT_TARGET) && (cr == AVCT_CMD)) || 574 ((avrc_cb.ccb[handle].control & AVRC_CT_CONTROL) && (cr == AVCT_RSP)) ) 575 { 576 577 switch(opcode) 578 { 579 case AVRC_OP_UNIT_INFO: 580 if (cr == AVCT_CMD) 581 { 582 /* send the response to the peer */ 583 p_rsp = p_pkt; /* this also sets free = FALSE, drop = TRUE */ 584 /* check & set the offset. set response code, set subunit_type & subunit_id, 585 set AVRC_OP_UNIT_INFO */ 586 /* 3 bytes: ctype, subunit*, opcode */ 587 p_rsp_data = avrc_get_data_ptr(p_pkt) + AVRC_AVC_HDR_SIZE; 588 *p_rsp_data++ = 7; 589 /* Panel subunit & id=0 */ 590 *p_rsp_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); 591 AVRC_CO_ID_TO_BE_STREAM(p_rsp_data, avrc_cb.ccb[handle].company_id); 592 p_rsp->len = (UINT16) (p_rsp_data - (UINT8 *)(p_rsp + 1) - p_rsp->offset); 593 cr = AVCT_RSP; 594#if (BT_USE_TRACES == TRUE) 595 p_drop_msg = "auto respond"; 596#endif 597 } 598 else 599 { 600 /* parse response */ 601 p_data += 4; /* 3 bytes: ctype, subunit*, opcode + octet 3 (is 7)*/ 602 msg.unit.unit_type = (*p_data & AVRC_SUBTYPE_MASK) >> AVRC_SUBTYPE_SHIFT; 603 msg.unit.unit = *p_data & AVRC_SUBID_MASK; 604 p_data++; 605 AVRC_BE_STREAM_TO_CO_ID(msg.unit.company_id, p_data); 606 } 607 break; 608 609 case AVRC_OP_SUB_INFO: 610 if (cr == AVCT_CMD) 611 { 612 /* send the response to the peer */ 613 p_rsp = p_pkt; /* this also sets free = FALSE, drop = TRUE */ 614 /* check & set the offset. set response code, set (subunit_type & subunit_id), 615 set AVRC_OP_SUB_INFO, set (page & extention code) */ 616 p_rsp_data = avrc_get_data_ptr(p_pkt) + 4; 617 /* Panel subunit & id=0 */ 618 *p_rsp_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); 619 memset(p_rsp_data, AVRC_CMD_OPRND_PAD, AVRC_SUBRSP_OPRND_BYTES); 620 p_rsp_data += AVRC_SUBRSP_OPRND_BYTES; 621 p_rsp->len = (UINT16) (p_rsp_data - (UINT8 *)(p_rsp + 1) - p_rsp->offset); 622 cr = AVCT_RSP; 623#if (BT_USE_TRACES == TRUE) 624 p_drop_msg = "auto responded"; 625#endif 626 } 627 else 628 { 629 /* parse response */ 630 p_data += AVRC_AVC_HDR_SIZE; /* 3 bytes: ctype, subunit*, opcode */ 631 msg.sub.page = (*p_data++ >> AVRC_SUB_PAGE_SHIFT) & AVRC_SUB_PAGE_MASK; 632 xx = 0; 633 while (*p_data != AVRC_CMD_OPRND_PAD && xx<AVRC_SUB_TYPE_LEN) 634 { 635 msg.sub.subunit_type[xx] = *p_data++ >> AVRC_SUBTYPE_SHIFT; 636 if (msg.sub.subunit_type[xx] == AVRC_SUB_PANEL) 637 msg.sub.panel = TRUE; 638 xx++; 639 } 640 } 641 break; 642 643 case AVRC_OP_VENDOR: 644 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 645 p_begin = p_data; 646 if (p_pkt->len < AVRC_VENDOR_HDR_SIZE) /* 6 = ctype, subunit*, opcode & CO_ID */ 647 { 648 if (cr == AVCT_CMD) 649 reject = TRUE; 650 else 651 drop = TRUE; 652 break; 653 } 654 p_data += AVRC_AVC_HDR_SIZE; /* skip the first 3 bytes: ctype, subunit*, opcode */ 655 AVRC_BE_STREAM_TO_CO_ID(p_msg->company_id, p_data); 656 p_msg->p_vendor_data = p_data; 657 p_msg->vendor_len = p_pkt->len - (p_data - p_begin); 658 659#if (AVRC_METADATA_INCLUDED == TRUE) 660 if (p_msg->company_id == AVRC_CO_METADATA) 661 { 662 /* Validate length for metadata message */ 663 if (p_pkt->len < (AVRC_VENDOR_HDR_SIZE + AVRC_MIN_META_HDR_SIZE)) 664 { 665 if (cr == AVCT_CMD) 666 reject = TRUE; 667 else 668 drop = TRUE; 669 break; 670 } 671 672 /* Check+handle fragmented messages */ 673 drop = avrc_proc_far_msg(handle, label, cr, &p_pkt, p_msg); 674 } 675 if (drop) 676 { 677 free = FALSE; 678 if (drop == 4) 679 free = TRUE; 680#if (BT_USE_TRACES == TRUE) 681 switch (drop) 682 { 683 case 1: 684 p_drop_msg = "sent_frag"; 685 break; 686 case 2: 687 p_drop_msg = "req_cont"; 688 break; 689 case 3: 690 p_drop_msg = "sent_frag3"; 691 break; 692 case 4: 693 p_drop_msg = "sent_frag_free"; 694 break; 695 default: 696 p_drop_msg = "sent_fragd"; 697 } 698#endif 699 } 700#endif /* (AVRC_METADATA_INCLUDED == TRUE) */ 701 break; 702 703 case AVRC_OP_PASS_THRU: 704 if (p_pkt->len < 5) /* 3 bytes: ctype, subunit*, opcode & op_id & len */ 705 { 706 if (cr == AVCT_CMD) 707 reject = TRUE; 708 else 709 drop = TRUE; 710 break; 711 } 712 p_data += AVRC_AVC_HDR_SIZE; /* skip the first 3 bytes: ctype, subunit*, opcode */ 713 msg.pass.op_id = (AVRC_PASS_OP_ID_MASK & *p_data); 714 if (AVRC_PASS_STATE_MASK & *p_data) 715 msg.pass.state = TRUE; 716 else 717 msg.pass.state = FALSE; 718 p_data++; 719 msg.pass.pass_len = *p_data++; 720 if (msg.pass.pass_len != p_pkt->len - 5) 721 msg.pass.pass_len = p_pkt->len - 5; 722 if (msg.pass.pass_len) 723 msg.pass.p_pass_data = p_data; 724 else 725 msg.pass.p_pass_data = NULL; 726 break; 727 728 729 default: 730 if ((avrc_cb.ccb[handle].control & AVRC_CT_TARGET) && (cr == AVCT_CMD)) 731 { 732 /* reject unsupported opcode */ 733 reject = TRUE; 734 } 735 drop = TRUE; 736 break; 737 } 738 } 739 else /* drop the event */ 740 { 741 drop = TRUE; 742 } 743 744 if (reject) 745 { 746 /* reject unsupported opcode */ 747 p_rsp = p_pkt; /* this also sets free = FALSE, drop = TRUE */ 748 p_rsp_data = avrc_get_data_ptr(p_pkt); 749 *p_rsp_data = AVRC_RSP_REJ; 750#if (BT_USE_TRACES == TRUE) 751 p_drop_msg = "rejected"; 752#endif 753 cr = AVCT_RSP; 754 drop = TRUE; 755 } 756 757 if (p_rsp) 758 { 759 /* set to send response right away */ 760 AVCT_MsgReq( handle, label, cr, p_rsp); 761 free = FALSE; 762 drop = TRUE; 763 } 764 765 if (drop == FALSE) 766 { 767 msg.hdr.opcode = opcode; 768 (*avrc_cb.ccb[handle].p_msg_cback)(handle, label, opcode, &msg); 769 } 770#if (BT_USE_TRACES == TRUE) 771 else 772 { 773 AVRC_TRACE_WARNING5("avrc_msg_cback %s msg handle:%d, control:%d, cr:%d, opcode:x%x", 774 p_drop_msg, 775 handle, avrc_cb.ccb[handle].control, cr, opcode); 776 } 777#endif 778 779 780 if (free) 781 GKI_freebuf(p_pkt); 782} 783 784 785 786 787/****************************************************************************** 788** 789** Function avrc_pass_msg 790** 791** Description Compose a PASS THROUGH command according to p_msg 792** 793** Input Parameters: 794** p_msg: Pointer to PASS THROUGH message structure. 795** 796** Output Parameters: 797** None. 798** 799** Returns pointer to a valid GKI buffer if successful. 800** NULL if p_msg is NULL. 801** 802******************************************************************************/ 803static BT_HDR * avrc_pass_msg(tAVRC_MSG_PASS *p_msg) 804{ 805 BT_HDR *p_cmd = NULL; 806 UINT8 *p_data; 807 808 WC_ASSERT(p_msg != NULL); 809 WC_ASSERT(AVRC_CMD_POOL_SIZE > (AVRC_MIN_CMD_LEN+p_msg->pass_len)); 810 811 if ((p_cmd = (BT_HDR *) GKI_getpoolbuf(AVRC_CMD_POOL_ID)) != NULL) 812 { 813 p_cmd->offset = AVCT_MSG_OFFSET; 814 p_cmd->layer_specific = AVCT_DATA_CTRL; 815 p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; 816 *p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK); 817 *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); /* Panel subunit & id=0 */ 818 *p_data++ = AVRC_OP_PASS_THRU; 819 *p_data = (AVRC_PASS_OP_ID_MASK&p_msg->op_id); 820 if (p_msg->state) 821 *p_data |= AVRC_PASS_STATE_MASK; 822 p_data++; 823 824 if (p_msg->op_id == AVRC_ID_VENDOR) 825 { 826 *p_data++ = p_msg->pass_len; 827 if (p_msg->pass_len && p_msg->p_pass_data) 828 { 829 memcpy(p_data, p_msg->p_pass_data, p_msg->pass_len); 830 p_data += p_msg->pass_len; 831 } 832 } 833 else /* set msg len to 0 for other op_id */ 834 { 835 /* set msg len to 0 for other op_id */ 836 *p_data++ = 0; 837 } 838 p_cmd->len = (UINT16) (p_data - (UINT8 *)(p_cmd + 1) - p_cmd->offset); 839 } 840 return p_cmd; 841} 842 843/****************************************************************************** 844** 845** Function AVRC_Open 846** 847** Description This function is called to open a connection to AVCTP. 848** The connection can be either an initiator or acceptor, as 849** determined by the p_ccb->stream parameter. 850** The connection can be a target, a controller or for both role, 851** as determined by the p_ccb->control parameter. 852** By definition, a target connection is an acceptor connection 853** that waits for an incoming AVCTP connection from the peer. 854** The connection remains available to the application until 855** the application closes it by calling AVRC_Close(). The 856** application does not need to reopen the connection after an 857** AVRC_CLOSE_IND_EVT is received. 858** 859** Input Parameters: 860** p_ccb->company_id: Company Identifier. 861** 862** p_ccb->p_ctrl_cback: Pointer to control callback function. 863** 864** p_ccb->p_msg_cback: Pointer to message callback function. 865** 866** p_ccb->conn: AVCTP connection role. This is set to 867** AVCTP_INT for initiator connections and AVCTP_ACP 868** for acceptor connections. 869** 870** p_ccb->control: Control role. This is set to 871** AVRC_CT_TARGET for target connections, AVRC_CT_CONTROL 872** for control connections or (AVRC_CT_TARGET|AVRC_CT_CONTROL) 873** for connections that support both roles. 874** 875** peer_addr: BD address of peer device. This value is 876** only used for initiator connections; for acceptor 877** connections it can be set to NULL. 878** 879** Output Parameters: 880** p_handle: Pointer to handle. This parameter is only 881** valid if AVRC_SUCCESS is returned. 882** 883** Returns AVRC_SUCCESS if successful. 884** AVRC_NO_RESOURCES if there are not enough resources to open 885** the connection. 886** 887******************************************************************************/ 888UINT16 AVRC_Open(UINT8 *p_handle, tAVRC_CONN_CB *p_ccb, BD_ADDR_PTR peer_addr) 889{ 890 UINT16 status; 891 tAVCT_CC cc; 892 893 cc.p_ctrl_cback = avrc_ctrl_cback; /* Control callback */ 894 cc.p_msg_cback = avrc_msg_cback; /* Message callback */ 895 cc.pid = UUID_SERVCLASS_AV_REMOTE_CONTROL; /* Profile ID */ 896 cc.role = p_ccb->conn; /* Initiator/acceptor role */ 897 cc.control = p_ccb->control; /* Control role (Control/Target) */ 898 899 status = AVCT_CreateConn(p_handle, &cc, peer_addr); 900 if (status == AVCT_SUCCESS) 901 { 902 memcpy(&avrc_cb.ccb[*p_handle], p_ccb, sizeof(tAVRC_CONN_CB)); 903#if (AVRC_METADATA_INCLUDED == TRUE) 904 memset(&avrc_cb.fcb[*p_handle], 0, sizeof(tAVRC_FRAG_CB)); 905 memset(&avrc_cb.rcb[*p_handle], 0, sizeof(tAVRC_RASM_CB)); 906#endif 907 } 908 AVRC_TRACE_DEBUG4("AVRC_Open role: %d, control:%d status:%d, handle:%d", cc.role, cc.control, 909 status, *p_handle); 910 911 return status; 912} 913 914/****************************************************************************** 915** 916** Function AVRC_Close 917** 918** Description Close a connection opened with AVRC_Open(). 919** This function is called when the 920** application is no longer using a connection. 921** 922** Input Parameters: 923** handle: Handle of this connection. 924** 925** Output Parameters: 926** None. 927** 928** Returns AVRC_SUCCESS if successful. 929** AVRC_BAD_HANDLE if handle is invalid. 930** 931******************************************************************************/ 932UINT16 AVRC_Close(UINT8 handle) 933{ 934 AVRC_TRACE_DEBUG1("AVRC_Close handle:%d", handle); 935 return AVCT_RemoveConn(handle); 936} 937 938 939/****************************************************************************** 940** 941** Function AVRC_MsgReq 942** 943** Description This function is used to send the AVRCP byte stream in p_pkt 944** down to AVCTP. 945** 946** It is expected that p_pkt->offset is at least AVCT_MSG_OFFSET 947** p_pkt->layer_specific is AVCT_DATA_CTRL or AVCT_DATA_BROWSE 948** p_pkt->event is AVRC_OP_VENDOR, AVRC_OP_PASS_THRU or AVRC_OP_BROWSE 949** The above BT_HDR settings are set by the AVRC_Bld* functions. 950** 951** Returns AVRC_SUCCESS if successful. 952** AVRC_BAD_HANDLE if handle is invalid. 953** 954******************************************************************************/ 955UINT16 AVRC_MsgReq (UINT8 handle, UINT8 label, UINT8 ctype, BT_HDR *p_pkt) 956{ 957#if (AVRC_METADATA_INCLUDED == TRUE) 958 UINT8 *p_data; 959 UINT8 cr = AVCT_CMD; 960 BOOLEAN chk_frag = TRUE; 961 UINT8 *p_start = NULL; 962 tAVRC_FRAG_CB *p_fcb; 963 UINT16 len; 964 BT_HDR *p_pkt_new; 965 966 if (!p_pkt) 967 return AVRC_BAD_PARAM; 968 969 if (ctype >= AVRC_RSP_NOT_IMPL) 970 cr = AVCT_RSP; 971 972 if (p_pkt->event == AVRC_OP_VENDOR) 973 { 974 /* add AVRCP Vendor Dependent headers */ 975 p_start = ((UINT8 *)(p_pkt + 1) + p_pkt->offset); 976 p_pkt->offset -= AVRC_VENDOR_HDR_SIZE; 977 p_pkt->len += AVRC_VENDOR_HDR_SIZE; 978 p_data = (UINT8 *)(p_pkt + 1) + p_pkt->offset; 979 *p_data++ = (ctype & AVRC_CTYPE_MASK); 980 *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); 981 *p_data++ = AVRC_OP_VENDOR; 982 AVRC_CO_ID_TO_BE_STREAM(p_data, AVRC_CO_METADATA); 983 } 984 else if (p_pkt->event == AVRC_OP_PASS_THRU) 985 { 986 /* add AVRCP Pass Through headers */ 987 p_start = ((UINT8 *)(p_pkt + 1) + p_pkt->offset); 988 p_pkt->offset -= AVRC_PASS_THRU_SIZE; 989 p_pkt->len += AVRC_PASS_THRU_SIZE; 990 p_data = (UINT8 *)(p_pkt + 1) + p_pkt->offset; 991 *p_data++ = (ctype & AVRC_CTYPE_MASK); 992 *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); 993 *p_data++ = AVRC_OP_PASS_THRU;/* opcode */ 994 *p_data++ = AVRC_ID_VENDOR; /* operation id */ 995 *p_data++ = 5; /* operation data len */ 996 AVRC_CO_ID_TO_BE_STREAM(p_data, AVRC_CO_METADATA); 997 } 998 999 /* abandon previous fragments */ 1000 p_fcb = &avrc_cb.fcb[handle]; 1001 if (p_fcb->frag_enabled) 1002 p_fcb->frag_enabled = FALSE; 1003 1004 if (p_fcb->p_fmsg) 1005 { 1006 GKI_freebuf(p_fcb->p_fmsg); 1007 p_fcb->p_fmsg = NULL; 1008 } 1009 1010 /* AVRCP spec has not defined any control channel commands that needs fragmentation at this level 1011 * check for fragmentation only on the response */ 1012 if ((cr == AVCT_RSP) && (chk_frag == TRUE)) 1013 { 1014 if (p_pkt->len > AVRC_MAX_CTRL_DATA_LEN) 1015 { 1016 AVRC_TRACE_DEBUG1 ("p_pkt->len(%d) > AVRC_MAX_CTRL_DATA_LEN", p_pkt->len ); 1017 p_pkt_new = (BT_HDR *)GKI_getbuf((UINT16)(AVRC_PACKET_LEN + AVCT_MSG_OFFSET 1018 + BT_HDR_SIZE)); 1019 if (p_pkt_new) 1020 { 1021 p_fcb->frag_enabled = TRUE; 1022 p_fcb->p_fmsg = p_pkt; 1023 p_fcb->frag_pdu = *p_start; 1024 p_pkt = p_pkt_new; 1025 p_pkt_new = p_fcb->p_fmsg; 1026 p_pkt->len = AVRC_MAX_CTRL_DATA_LEN; 1027 p_pkt->offset = p_pkt_new->offset; 1028 p_pkt->layer_specific = p_pkt_new->layer_specific; 1029 p_pkt->event = p_pkt_new->event; 1030 p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; 1031 p_start -= AVRC_VENDOR_HDR_SIZE; 1032 memcpy (p_data, p_start, AVRC_MAX_CTRL_DATA_LEN); 1033 /* use AVRC start packet type */ 1034 p_data += AVRC_VENDOR_HDR_SIZE; 1035 p_data++; /* pdu */ 1036 *p_data++ = AVRC_PKT_START; 1037 /* 4 pdu, pkt_type & len */ 1038 len = (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE); 1039 UINT16_TO_BE_STREAM(p_data, len); 1040 1041 /* prepare the left over for as an end fragment */ 1042 avrc_prep_end_frag (handle); 1043 AVRC_TRACE_DEBUG3 ("p_pkt len:%d/%d, next len:%d", p_pkt->len, len, p_fcb->p_fmsg->len ); 1044 } 1045 else 1046 { 1047 AVRC_TRACE_ERROR0 ("AVRC_MsgReq no buffers for fragmentation" ); 1048 GKI_freebuf(p_pkt); 1049 return AVRC_NO_RESOURCES; 1050} 1051 } 1052 } 1053 1054 return AVCT_MsgReq( handle, label, cr, p_pkt); 1055#else 1056 return AVRC_NO_RESOURCES; 1057#endif 1058} 1059 1060 1061/****************************************************************************** 1062** 1063** Function AVRC_PassCmd 1064** 1065** Description Send a PASS THROUGH command to the peer device. This 1066** function can only be called for controller role connections. 1067** Any response message from the peer is passed back through 1068** the tAVRC_MSG_CBACK callback function. 1069** 1070** Input Parameters: 1071** handle: Handle of this connection. 1072** 1073** label: Transaction label. 1074** 1075** p_msg: Pointer to PASS THROUGH message structure. 1076** 1077** Output Parameters: 1078** None. 1079** 1080** Returns AVRC_SUCCESS if successful. 1081** AVRC_BAD_HANDLE if handle is invalid. 1082** 1083******************************************************************************/ 1084UINT16 AVRC_PassCmd(UINT8 handle, UINT8 label, tAVRC_MSG_PASS *p_msg) 1085{ 1086 BT_HDR *p_buf; 1087 WC_ASSERT(p_msg != NULL); 1088 if (p_msg) 1089 { 1090 p_msg->hdr.ctype = AVRC_CMD_CTRL; 1091 p_buf = avrc_pass_msg(p_msg); 1092 if (p_buf) 1093 return AVCT_MsgReq( handle, label, AVCT_CMD, p_buf); 1094 } 1095 return AVRC_NO_RESOURCES; 1096} 1097 1098/****************************************************************************** 1099** 1100** Function AVRC_PassRsp 1101** 1102** Description Send a PASS THROUGH response to the peer device. This 1103** function can only be called for target role connections. 1104** This function must be called when a PASS THROUGH command 1105** message is received from the peer through the 1106** tAVRC_MSG_CBACK callback function. 1107** 1108** Input Parameters: 1109** handle: Handle of this connection. 1110** 1111** label: Transaction label. Must be the same value as 1112** passed with the command message in the callback function. 1113** 1114** p_msg: Pointer to PASS THROUGH message structure. 1115** 1116** Output Parameters: 1117** None. 1118** 1119** Returns AVRC_SUCCESS if successful. 1120** AVRC_BAD_HANDLE if handle is invalid. 1121** 1122******************************************************************************/ 1123UINT16 AVRC_PassRsp(UINT8 handle, UINT8 label, tAVRC_MSG_PASS *p_msg) 1124{ 1125 BT_HDR *p_buf; 1126 WC_ASSERT(p_msg != NULL); 1127 if (p_msg) 1128 { 1129 p_buf = avrc_pass_msg(p_msg); 1130 if (p_buf) 1131 return AVCT_MsgReq( handle, label, AVCT_RSP, p_buf); 1132 } 1133 return AVRC_NO_RESOURCES; 1134} 1135 1136