/****************************************************************************** * * Copyright (C) 2003-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ /****************************************************************************** * * Interface to AVRCP mandatory commands * ******************************************************************************/ #include #include #include "bt_common.h" #include "avrc_api.h" #include "avrc_int.h" /***************************************************************************** ** Global data *****************************************************************************/ #define AVRC_MAX_RCV_CTRL_EVT AVCT_BROWSE_UNCONG_IND_EVT #ifndef MAX #define MAX(a, b) ((a) > (b) ? (a) : (b)) #endif static const UINT8 avrc_ctrl_event_map[] = { AVRC_OPEN_IND_EVT, /* AVCT_CONNECT_CFM_EVT */ AVRC_OPEN_IND_EVT, /* AVCT_CONNECT_IND_EVT */ AVRC_CLOSE_IND_EVT, /* AVCT_DISCONNECT_CFM_EVT */ AVRC_CLOSE_IND_EVT, /* AVCT_DISCONNECT_IND_EVT */ AVRC_CONG_IND_EVT, /* AVCT_CONG_IND_EVT */ AVRC_UNCONG_IND_EVT,/* AVCT_UNCONG_IND_EVT */ AVRC_BROWSE_OPEN_IND_EVT, /* AVCT_BROWSE_CONN_CFM_EVT */ AVRC_BROWSE_OPEN_IND_EVT, /* AVCT_BROWSE_CONN_IND_EVT */ AVRC_BROWSE_CLOSE_IND_EVT, /* AVCT_BROWSE_DISCONN_CFM_EVT */ AVRC_BROWSE_CLOSE_IND_EVT, /* AVCT_BROWSE_DISCONN_IND_EVT */ AVRC_BROWSE_CONG_IND_EVT, /* AVCT_BROWSE_CONG_IND_EVT */ AVRC_BROWSE_UNCONG_IND_EVT /* AVCT_BROWSE_UNCONG_IND_EVT */ }; #define AVRC_OP_DROP 0xFE /* use this unused opcode to indication no need to call the callback function */ #define AVRC_OP_DROP_N_FREE 0xFD /* use this unused opcode to indication no need to call the callback function & free buffer */ #define AVRC_OP_UNIT_INFO_RSP_LEN 8 #define AVRC_OP_SUB_UNIT_INFO_RSP_LEN 8 #define AVRC_OP_REJ_MSG_LEN 11 /****************************************************************************** ** ** Function avrc_ctrl_cback ** ** Description This is the callback function used by AVCTP to report ** received link events. ** ** Returns Nothing. ** ******************************************************************************/ static void avrc_ctrl_cback(UINT8 handle, UINT8 event, UINT16 result, BD_ADDR peer_addr) { UINT8 avrc_event; if (event <= AVRC_MAX_RCV_CTRL_EVT && avrc_cb.ccb[handle].p_ctrl_cback) { avrc_event = avrc_ctrl_event_map[event]; if (event == AVCT_CONNECT_CFM_EVT) { if (result != 0) /* failed */ avrc_event = AVRC_CLOSE_IND_EVT; } (*avrc_cb.ccb[handle].p_ctrl_cback)(handle, avrc_event, result, peer_addr); } /* else drop the unknown event*/ } /****************************************************************************** ** ** Function avrc_get_data_ptr ** ** Description Gets a pointer to the data payload in the packet. ** ** Returns A pointer to the data payload. ** ******************************************************************************/ static UINT8 * avrc_get_data_ptr(BT_HDR *p_pkt) { return (UINT8 *)(p_pkt + 1) + p_pkt->offset; } /****************************************************************************** ** ** Function avrc_copy_packet ** ** Description Copies an AVRC packet to a new buffer. In the new buffer, ** the payload offset is at least AVCT_MSG_OFFSET octets. ** ** Returns The buffer with the copied data. ** ******************************************************************************/ static BT_HDR * avrc_copy_packet(BT_HDR *p_pkt, int rsp_pkt_len) { const int offset = MAX(AVCT_MSG_OFFSET, p_pkt->offset); const int pkt_len = MAX(rsp_pkt_len, p_pkt->len); BT_HDR *p_pkt_copy = (BT_HDR *)osi_malloc(BT_HDR_SIZE + offset + pkt_len); /* Copy the packet header, set the new offset, and copy the payload */ memcpy(p_pkt_copy, p_pkt, BT_HDR_SIZE); p_pkt_copy->offset = offset; UINT8 *p_data = avrc_get_data_ptr(p_pkt); UINT8 *p_data_copy = avrc_get_data_ptr(p_pkt_copy); memcpy(p_data_copy, p_data, p_pkt->len); return p_pkt_copy; } #if (AVRC_METADATA_INCLUDED == TRUE) /****************************************************************************** ** ** Function avrc_prep_end_frag ** ** Description This function prepares an end response fragment ** ** Returns Nothing. ** ******************************************************************************/ static void avrc_prep_end_frag(UINT8 handle) { tAVRC_FRAG_CB *p_fcb; BT_HDR *p_pkt_new; UINT8 *p_data, *p_orig_data; UINT8 rsp_type; AVRC_TRACE_DEBUG ("avrc_prep_end_frag" ); p_fcb = &avrc_cb.fcb[handle]; /* The response type of the end fragment should be the same as the the PDU of "End Fragment ** Response" Errata: https://www.bluetooth.org/errata/errata_view.cfm?errata_id=4383 */ p_orig_data = ((UINT8 *)(p_fcb->p_fmsg + 1) + p_fcb->p_fmsg->offset); rsp_type = ((*p_orig_data) & AVRC_CTYPE_MASK); p_pkt_new = p_fcb->p_fmsg; p_pkt_new->len -= (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE); p_pkt_new->offset += (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE); p_data = (UINT8 *)(p_pkt_new+1) + p_pkt_new->offset; *p_data++ = rsp_type; *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); *p_data++ = AVRC_OP_VENDOR; AVRC_CO_ID_TO_BE_STREAM(p_data, AVRC_CO_METADATA); *p_data++ = p_fcb->frag_pdu; *p_data++ = AVRC_PKT_END; /* 4=pdu, pkt_type & len */ UINT16_TO_BE_STREAM(p_data, (p_pkt_new->len - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE)); } /****************************************************************************** ** ** Function avrc_send_continue_frag ** ** Description This function sends a continue response fragment ** ** Returns Nothing. ** ******************************************************************************/ static void avrc_send_continue_frag(UINT8 handle, UINT8 label) { tAVRC_FRAG_CB *p_fcb; BT_HDR *p_pkt_old, *p_pkt; UINT8 *p_old, *p_data; UINT8 cr = AVCT_RSP; p_fcb = &avrc_cb.fcb[handle]; p_pkt = p_fcb->p_fmsg; AVRC_TRACE_DEBUG("%s handle = %u label = %u len = %d", __func__, handle, label, p_pkt->len); if (p_pkt->len > AVRC_MAX_CTRL_DATA_LEN) { int offset_len = MAX(AVCT_MSG_OFFSET, p_pkt->offset); p_pkt_old = p_fcb->p_fmsg; p_pkt = (BT_HDR *)osi_malloc(AVRC_PACKET_LEN + offset_len + BT_HDR_SIZE); p_pkt->len = AVRC_MAX_CTRL_DATA_LEN; p_pkt->offset = AVCT_MSG_OFFSET; p_pkt->layer_specific = p_pkt_old->layer_specific; p_pkt->event = p_pkt_old->event; p_old = (UINT8 *)(p_pkt_old + 1) + p_pkt_old->offset; p_data = (UINT8 *)(p_pkt + 1) + p_pkt->offset; memcpy (p_data, p_old, AVRC_MAX_CTRL_DATA_LEN); /* use AVRC continue packet type */ p_data += AVRC_VENDOR_HDR_SIZE; p_data++; /* pdu */ *p_data++ = AVRC_PKT_CONTINUE; /* 4=pdu, pkt_type & len */ UINT16_TO_BE_STREAM(p_data, (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - 4)); /* prepare the left over for as an end fragment */ avrc_prep_end_frag (handle); } else { /* end fragment. clean the control block */ p_fcb->frag_enabled = FALSE; p_fcb->p_fmsg = NULL; } AVCT_MsgReq( handle, label, cr, p_pkt); } /****************************************************************************** ** ** Function avrc_proc_vendor_command ** ** Description This function processes received vendor command. ** ** Returns if not NULL, the response to send right away. ** ******************************************************************************/ static BT_HDR * avrc_proc_vendor_command(UINT8 handle, UINT8 label, BT_HDR *p_pkt, tAVRC_MSG_VENDOR *p_msg) { BT_HDR *p_rsp = NULL; UINT8 *p_data; UINT8 *p_begin; UINT8 pkt_type; BOOLEAN abort_frag = FALSE; tAVRC_STS status = AVRC_STS_NO_ERROR; tAVRC_FRAG_CB *p_fcb; p_begin = (UINT8 *)(p_pkt+1) + p_pkt->offset; p_data = p_begin + AVRC_VENDOR_HDR_SIZE; pkt_type = *(p_data + 1) & AVRC_PKT_TYPE_MASK; if (pkt_type != AVRC_PKT_SINGLE) { /* reject - commands can only be in single packets at AVRCP level */ AVRC_TRACE_ERROR ("commands must be in single packet pdu:0x%x", *p_data ); /* use the current GKI buffer to send the reject */ status = AVRC_STS_BAD_CMD; } /* check if there are fragments waiting to be sent */ else if (avrc_cb.fcb[handle].frag_enabled) { p_fcb = &avrc_cb.fcb[handle]; if (p_msg->company_id == AVRC_CO_METADATA) { switch (*p_data) { case AVRC_PDU_ABORT_CONTINUATION_RSP: /* aborted by CT - send accept response */ abort_frag = TRUE; p_begin = (UINT8 *)(p_pkt+1) + p_pkt->offset; *p_begin = (AVRC_RSP_ACCEPT & AVRC_CTYPE_MASK); if (*(p_data + 4) != p_fcb->frag_pdu) { *p_begin = (AVRC_RSP_REJ & AVRC_CTYPE_MASK); *(p_data + 4) = AVRC_STS_BAD_PARAM; } else { p_data = (p_begin + AVRC_VENDOR_HDR_SIZE + 2); UINT16_TO_BE_STREAM(p_data, 0); p_pkt->len = (p_data - p_begin); } AVCT_MsgReq( handle, label, AVCT_RSP, p_pkt); p_msg->hdr.opcode = AVRC_OP_DROP; /* used the p_pkt to send response */ break; case AVRC_PDU_REQUEST_CONTINUATION_RSP: if (*(p_data + 4) == p_fcb->frag_pdu) { avrc_send_continue_frag(handle, label); p_msg->hdr.opcode = AVRC_OP_DROP_N_FREE; } else { /* the pdu id does not match - reject the command using the current GKI buffer */ AVRC_TRACE_ERROR("avrc_proc_vendor_command continue pdu: 0x%x does not match \ current re-assembly pdu: 0x%x", *(p_data + 4), p_fcb->frag_pdu); status = AVRC_STS_BAD_PARAM; abort_frag = TRUE; } break; default: /* implicit abort */ abort_frag = TRUE; } } else { abort_frag = TRUE; /* implicit abort */ } if (abort_frag) { osi_free_and_reset((void **)&p_fcb->p_fmsg); p_fcb->frag_enabled = FALSE; } } if (status != AVRC_STS_NO_ERROR) { /* use the current GKI buffer to build/send the reject message */ p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; *p_data++ = AVRC_RSP_REJ; p_data += AVRC_VENDOR_HDR_SIZE; /* pdu */ *p_data++ = 0; /* pkt_type */ UINT16_TO_BE_STREAM(p_data, 1); /* len */ *p_data++ = status; /* error code */ p_pkt->len = AVRC_VENDOR_HDR_SIZE + 5; p_rsp = p_pkt; } return p_rsp; } /****************************************************************************** ** ** Function avrc_proc_far_msg ** ** Description This function processes metadata fragmenation ** and reassembly ** ** Returns 0, to report the message with msg_cback . ** ******************************************************************************/ static UINT8 avrc_proc_far_msg(UINT8 handle, UINT8 label, UINT8 cr, BT_HDR **pp_pkt, tAVRC_MSG_VENDOR *p_msg) { BT_HDR *p_pkt = *pp_pkt; UINT8 *p_data; UINT8 drop_code = 0; BOOLEAN buf_overflow = FALSE; BT_HDR *p_rsp = NULL; BT_HDR *p_cmd = NULL; BOOLEAN req_continue = FALSE; BT_HDR *p_pkt_new = NULL; UINT8 pkt_type; tAVRC_RASM_CB *p_rcb; tAVRC_NEXT_CMD avrc_cmd; p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; /* Skip over vendor header (ctype, subunit*, opcode, CO_ID) */ p_data += AVRC_VENDOR_HDR_SIZE; pkt_type = *(p_data + 1) & AVRC_PKT_TYPE_MASK; AVRC_TRACE_DEBUG ("pkt_type %d", pkt_type ); p_rcb = &avrc_cb.rcb[handle]; if (p_msg->company_id == AVRC_CO_METADATA) { /* check if the message needs to be re-assembled */ if (pkt_type == AVRC_PKT_SINGLE || pkt_type == AVRC_PKT_START) { /* previous fragments need to be dropped, when received another new message */ p_rcb->rasm_offset = 0; osi_free_and_reset((void **)&p_rcb->p_rmsg); } if (pkt_type != AVRC_PKT_SINGLE && cr == AVCT_RSP) { /* not a single response packet - need to re-assemble metadata messages */ if (pkt_type == AVRC_PKT_START) { /* Allocate buffer for re-assembly */ p_rcb->rasm_pdu = *p_data; p_rcb->p_rmsg = (BT_HDR *)osi_malloc(BT_DEFAULT_BUFFER_SIZE); /* Copy START packet to buffer for re-assembling fragments */ memcpy(p_rcb->p_rmsg, p_pkt, sizeof(BT_HDR)); /* Copy bt hdr */ /* Copy metadata message */ memcpy((UINT8 *)(p_rcb->p_rmsg + 1), (UINT8 *)(p_pkt+1) + p_pkt->offset, p_pkt->len); /* offset of start of metadata response in reassembly buffer */ p_rcb->p_rmsg->offset = p_rcb->rasm_offset = 0; /* * Free original START packet, replace with pointer to * reassembly buffer. */ osi_free(p_pkt); *pp_pkt = p_rcb->p_rmsg; /* * Set offset to point to where to copy next - use the same * reassembly logic as AVCT. */ p_rcb->p_rmsg->offset += p_rcb->p_rmsg->len; req_continue = TRUE; } else if (p_rcb->p_rmsg == NULL) { /* Received a CONTINUE/END, but no corresponding START (or previous fragmented response was dropped) */ AVRC_TRACE_DEBUG ("Received a CONTINUE/END without no corresponding START \ (or previous fragmented response was dropped)"); drop_code = 5; osi_free(p_pkt); *pp_pkt = NULL; } else { /* get size of buffer holding assembled message */ /* * NOTE: The buffer is allocated above at the beginning of the * reassembly, and is always of size BT_DEFAULT_BUFFER_SIZE. */ UINT16 buf_len = BT_DEFAULT_BUFFER_SIZE - sizeof(BT_HDR); /* adjust offset and len of fragment for header byte */ p_pkt->offset += (AVRC_VENDOR_HDR_SIZE + AVRC_MIN_META_HDR_SIZE); p_pkt->len -= (AVRC_VENDOR_HDR_SIZE + AVRC_MIN_META_HDR_SIZE); /* verify length */ if ((p_rcb->p_rmsg->offset + p_pkt->len) > buf_len) { AVRC_TRACE_WARNING("Fragmented message too big! - report the partial message"); p_pkt->len = buf_len - p_rcb->p_rmsg->offset; pkt_type = AVRC_PKT_END; buf_overflow = true; } /* copy contents of p_pkt to p_rx_msg */ memcpy((UINT8 *)(p_rcb->p_rmsg + 1) + p_rcb->p_rmsg->offset, (UINT8 *)(p_pkt + 1) + p_pkt->offset, p_pkt->len); if (pkt_type == AVRC_PKT_END) { p_rcb->p_rmsg->offset = p_rcb->rasm_offset; p_rcb->p_rmsg->len += p_pkt->len; p_pkt_new = p_rcb->p_rmsg; p_rcb->rasm_offset = 0; p_rcb->p_rmsg = NULL; p_msg->p_vendor_data = (UINT8 *)(p_pkt_new+1) + p_pkt_new->offset; p_msg->hdr.ctype = p_msg->p_vendor_data[0] & AVRC_CTYPE_MASK; /* 6 = ctype, subunit*, opcode & CO_ID */ p_msg->p_vendor_data += AVRC_VENDOR_HDR_SIZE; p_msg->vendor_len = p_pkt_new->len - AVRC_VENDOR_HDR_SIZE; p_data = p_msg->p_vendor_data + 1; /* skip pdu */ *p_data++ = AVRC_PKT_SINGLE; UINT16_TO_BE_STREAM(p_data, (p_msg->vendor_len - AVRC_MIN_META_HDR_SIZE)); AVRC_TRACE_DEBUG("end frag:%d, total len:%d, offset:%d", p_pkt->len, p_pkt_new->len, p_pkt_new->offset); } else { p_rcb->p_rmsg->offset += p_pkt->len; p_rcb->p_rmsg->len += p_pkt->len; p_pkt_new = NULL; req_continue = TRUE; } osi_free(p_pkt); *pp_pkt = p_pkt_new; } } if (cr == AVCT_CMD) { p_rsp = avrc_proc_vendor_command(handle, label, *pp_pkt, p_msg); if (p_rsp) { AVCT_MsgReq( handle, label, AVCT_RSP, p_rsp); drop_code = 3; } else if (p_msg->hdr.opcode == AVRC_OP_DROP) { drop_code = 1; } else if (p_msg->hdr.opcode == AVRC_OP_DROP_N_FREE) drop_code = 4; } else if (cr == AVCT_RSP && req_continue == TRUE) { avrc_cmd.pdu = AVRC_PDU_REQUEST_CONTINUATION_RSP; avrc_cmd.status = AVRC_STS_NO_ERROR; avrc_cmd.target_pdu = p_rcb->rasm_pdu; if (AVRC_BldCommand ((tAVRC_COMMAND *)&avrc_cmd, &p_cmd) == AVRC_STS_NO_ERROR) { drop_code = 2; AVRC_MsgReq (handle, (UINT8)(label), AVRC_CMD_CTRL, p_cmd); } } /* * Drop it if we are out of buffer */ else if (cr == AVCT_RSP && req_continue == FALSE && buf_overflow == TRUE) { avrc_cmd.pdu = AVRC_PDU_ABORT_CONTINUATION_RSP; avrc_cmd.status = AVRC_STS_NO_ERROR; avrc_cmd.target_pdu = p_rcb->rasm_pdu; if (AVRC_BldCommand ((tAVRC_COMMAND *)&avrc_cmd, &p_cmd) == AVRC_STS_NO_ERROR) { drop_code = 4; AVRC_MsgReq (handle, (UINT8)(label), AVRC_CMD_CTRL, p_cmd); } } } return drop_code; } #endif /* (AVRC_METADATA_INCLUDED == TRUE) */ /****************************************************************************** ** ** Function avrc_msg_cback ** ** Description This is the callback function used by AVCTP to report ** received AV control messages. ** ** Returns Nothing. ** ******************************************************************************/ static void avrc_msg_cback(UINT8 handle, UINT8 label, UINT8 cr, BT_HDR *p_pkt) { UINT8 opcode; tAVRC_MSG msg; UINT8 *p_data; UINT8 *p_begin; BOOLEAN drop = FALSE; BOOLEAN do_free = TRUE; BT_HDR *p_rsp = NULL; UINT8 *p_rsp_data; int xx; BOOLEAN reject = FALSE; #if (BT_USE_TRACES == TRUE) char *p_drop_msg = "dropped"; #endif tAVRC_MSG_VENDOR *p_msg = &msg.vendor; if (cr == AVCT_CMD && (p_pkt->layer_specific & AVCT_DATA_CTRL && AVRC_PACKET_LEN < sizeof(p_pkt->len))) { /* Ignore the invalid AV/C command frame */ #if (BT_USE_TRACES == TRUE) p_drop_msg = "dropped - too long AV/C cmd frame size"; #endif osi_free(p_pkt); return; } if (cr == AVCT_REJ) { /* The peer thinks that this PID is no longer open - remove this handle */ /* */ osi_free(p_pkt); AVCT_RemoveConn(handle); return; } p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; memset(&msg, 0, sizeof(tAVRC_MSG) ); { msg.hdr.ctype = p_data[0] & AVRC_CTYPE_MASK; AVRC_TRACE_DEBUG("avrc_msg_cback handle:%d, ctype:%d, offset:%d, len: %d", handle, msg.hdr.ctype, p_pkt->offset, p_pkt->len); msg.hdr.subunit_type = (p_data[1] & AVRC_SUBTYPE_MASK) >> AVRC_SUBTYPE_SHIFT; msg.hdr.subunit_id = p_data[1] & AVRC_SUBID_MASK; opcode = p_data[2]; } if ( ((avrc_cb.ccb[handle].control & AVRC_CT_TARGET) && (cr == AVCT_CMD)) || ((avrc_cb.ccb[handle].control & AVRC_CT_CONTROL) && (cr == AVCT_RSP)) ) { switch(opcode) { case AVRC_OP_UNIT_INFO: if (cr == AVCT_CMD) { /* send the response to the peer */ p_rsp = avrc_copy_packet(p_pkt, AVRC_OP_UNIT_INFO_RSP_LEN); p_rsp_data = avrc_get_data_ptr(p_rsp); *p_rsp_data = AVRC_RSP_IMPL_STBL; /* check & set the offset. set response code, set subunit_type & subunit_id, set AVRC_OP_UNIT_INFO */ /* 3 bytes: ctype, subunit*, opcode */ p_rsp_data += AVRC_AVC_HDR_SIZE; *p_rsp_data++ = 7; /* Panel subunit & id=0 */ *p_rsp_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); AVRC_CO_ID_TO_BE_STREAM(p_rsp_data, avrc_cb.ccb[handle].company_id); p_rsp->len = (UINT16) (p_rsp_data - (UINT8 *)(p_rsp + 1) - p_rsp->offset); cr = AVCT_RSP; #if (BT_USE_TRACES == TRUE) p_drop_msg = "auto respond"; #endif } else { /* parse response */ p_data += 4; /* 3 bytes: ctype, subunit*, opcode + octet 3 (is 7)*/ msg.unit.unit_type = (*p_data & AVRC_SUBTYPE_MASK) >> AVRC_SUBTYPE_SHIFT; msg.unit.unit = *p_data & AVRC_SUBID_MASK; p_data++; AVRC_BE_STREAM_TO_CO_ID(msg.unit.company_id, p_data); } break; case AVRC_OP_SUB_INFO: if (cr == AVCT_CMD) { /* send the response to the peer */ p_rsp = avrc_copy_packet(p_pkt, AVRC_OP_SUB_UNIT_INFO_RSP_LEN); p_rsp_data = avrc_get_data_ptr(p_rsp); *p_rsp_data = AVRC_RSP_IMPL_STBL; /* check & set the offset. set response code, set (subunit_type & subunit_id), set AVRC_OP_SUB_INFO, set (page & extention code) */ p_rsp_data += 4; /* Panel subunit & id=0 */ *p_rsp_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); memset(p_rsp_data, AVRC_CMD_OPRND_PAD, AVRC_SUBRSP_OPRND_BYTES); p_rsp_data += AVRC_SUBRSP_OPRND_BYTES; p_rsp->len = (UINT16) (p_rsp_data - (UINT8 *)(p_rsp + 1) - p_rsp->offset); cr = AVCT_RSP; #if (BT_USE_TRACES == TRUE) p_drop_msg = "auto responded"; #endif } else { /* parse response */ p_data += AVRC_AVC_HDR_SIZE; /* 3 bytes: ctype, subunit*, opcode */ msg.sub.page = (*p_data++ >> AVRC_SUB_PAGE_SHIFT) & AVRC_SUB_PAGE_MASK; xx = 0; while (*p_data != AVRC_CMD_OPRND_PAD && xx> AVRC_SUBTYPE_SHIFT; if (msg.sub.subunit_type[xx] == AVRC_SUB_PANEL) msg.sub.panel = TRUE; xx++; } } break; case AVRC_OP_VENDOR: p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; p_begin = p_data; if (p_pkt->len < AVRC_VENDOR_HDR_SIZE) /* 6 = ctype, subunit*, opcode & CO_ID */ { if (cr == AVCT_CMD) reject = TRUE; else drop = TRUE; break; } p_data += AVRC_AVC_HDR_SIZE; /* skip the first 3 bytes: ctype, subunit*, opcode */ AVRC_BE_STREAM_TO_CO_ID(p_msg->company_id, p_data); p_msg->p_vendor_data = p_data; p_msg->vendor_len = p_pkt->len - (p_data - p_begin); #if (AVRC_METADATA_INCLUDED == TRUE) UINT8 drop_code = 0; if (p_msg->company_id == AVRC_CO_METADATA) { /* Validate length for metadata message */ if (p_pkt->len < (AVRC_VENDOR_HDR_SIZE + AVRC_MIN_META_HDR_SIZE)) { if (cr == AVCT_CMD) reject = TRUE; else drop = TRUE; break; } /* Check+handle fragmented messages */ drop_code = avrc_proc_far_msg(handle, label, cr, &p_pkt, p_msg); if (drop_code > 0) drop = TRUE; } if (drop_code > 0) { if (drop_code != 4) do_free = FALSE; #if (BT_USE_TRACES == TRUE) switch (drop_code) { case 1: p_drop_msg = "sent_frag"; break; case 2: p_drop_msg = "req_cont"; break; case 3: p_drop_msg = "sent_frag3"; break; case 4: p_drop_msg = "sent_frag_free"; break; default: p_drop_msg = "sent_fragd"; } #endif } #endif /* (AVRC_METADATA_INCLUDED == TRUE) */ break; case AVRC_OP_PASS_THRU: if (p_pkt->len < 5) /* 3 bytes: ctype, subunit*, opcode & op_id & len */ { if (cr == AVCT_CMD) reject = TRUE; else drop = TRUE; break; } p_data += AVRC_AVC_HDR_SIZE; /* skip the first 3 bytes: ctype, subunit*, opcode */ msg.pass.op_id = (AVRC_PASS_OP_ID_MASK & *p_data); if (AVRC_PASS_STATE_MASK & *p_data) msg.pass.state = TRUE; else msg.pass.state = FALSE; p_data++; msg.pass.pass_len = *p_data++; if (msg.pass.pass_len != p_pkt->len - 5) msg.pass.pass_len = p_pkt->len - 5; if (msg.pass.pass_len) msg.pass.p_pass_data = p_data; else msg.pass.p_pass_data = NULL; break; default: if ((avrc_cb.ccb[handle].control & AVRC_CT_TARGET) && (cr == AVCT_CMD)) { /* reject unsupported opcode */ reject = TRUE; } drop = TRUE; break; } } else /* drop the event */ { drop = TRUE; } if (reject) { /* reject unsupported opcode */ p_rsp = avrc_copy_packet(p_pkt, AVRC_OP_REJ_MSG_LEN); p_rsp_data = avrc_get_data_ptr(p_rsp); *p_rsp_data = AVRC_RSP_REJ; #if (BT_USE_TRACES == TRUE) p_drop_msg = "rejected"; #endif cr = AVCT_RSP; drop = TRUE; } if (p_rsp) { /* set to send response right away */ AVCT_MsgReq( handle, label, cr, p_rsp); drop = TRUE; } if (drop == FALSE) { msg.hdr.opcode = opcode; (*avrc_cb.ccb[handle].p_msg_cback)(handle, label, opcode, &msg); } #if (BT_USE_TRACES == TRUE) else { AVRC_TRACE_WARNING("avrc_msg_cback %s msg handle:%d, control:%d, cr:%d, opcode:x%x", p_drop_msg, handle, avrc_cb.ccb[handle].control, cr, opcode); } #endif if (do_free) osi_free(p_pkt); } /****************************************************************************** ** ** Function avrc_pass_msg ** ** Description Compose a PASS THROUGH command according to p_msg ** ** Input Parameters: ** p_msg: Pointer to PASS THROUGH message structure. ** ** Output Parameters: ** None. ** ** Returns pointer to a valid GKI buffer if successful. ** NULL if p_msg is NULL. ** ******************************************************************************/ static BT_HDR * avrc_pass_msg(tAVRC_MSG_PASS *p_msg) { assert(p_msg != NULL); assert(AVRC_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN+p_msg->pass_len)); BT_HDR *p_cmd = (BT_HDR *)osi_malloc(AVRC_CMD_BUF_SIZE); p_cmd->offset = AVCT_MSG_OFFSET; p_cmd->layer_specific = AVCT_DATA_CTRL; UINT8 *p_data = (UINT8 *)(p_cmd + 1) + p_cmd->offset; *p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK); *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); /* Panel subunit & id=0 */ *p_data++ = AVRC_OP_PASS_THRU; *p_data = (AVRC_PASS_OP_ID_MASK&p_msg->op_id); if (p_msg->state) *p_data |= AVRC_PASS_STATE_MASK; p_data++; if (p_msg->op_id == AVRC_ID_VENDOR) { *p_data++ = p_msg->pass_len; if (p_msg->pass_len && p_msg->p_pass_data) { memcpy(p_data, p_msg->p_pass_data, p_msg->pass_len); p_data += p_msg->pass_len; } } else { /* set msg len to 0 for other op_id */ *p_data++ = 0; } p_cmd->len = (UINT16) (p_data - (UINT8 *)(p_cmd + 1) - p_cmd->offset); return p_cmd; } /****************************************************************************** ** ** Function AVRC_Open ** ** Description This function is called to open a connection to AVCTP. ** The connection can be either an initiator or acceptor, as ** determined by the p_ccb->stream parameter. ** The connection can be a target, a controller or for both role, ** as determined by the p_ccb->control parameter. ** By definition, a target connection is an acceptor connection ** that waits for an incoming AVCTP connection from the peer. ** The connection remains available to the application until ** the application closes it by calling AVRC_Close(). The ** application does not need to reopen the connection after an ** AVRC_CLOSE_IND_EVT is received. ** ** Input Parameters: ** p_ccb->company_id: Company Identifier. ** ** p_ccb->p_ctrl_cback: Pointer to control callback function. ** ** p_ccb->p_msg_cback: Pointer to message callback function. ** ** p_ccb->conn: AVCTP connection role. This is set to ** AVCTP_INT for initiator connections and AVCTP_ACP ** for acceptor connections. ** ** p_ccb->control: Control role. This is set to ** AVRC_CT_TARGET for target connections, AVRC_CT_CONTROL ** for control connections or (AVRC_CT_TARGET|AVRC_CT_CONTROL) ** for connections that support both roles. ** ** peer_addr: BD address of peer device. This value is ** only used for initiator connections; for acceptor ** connections it can be set to NULL. ** ** Output Parameters: ** p_handle: Pointer to handle. This parameter is only ** valid if AVRC_SUCCESS is returned. ** ** Returns AVRC_SUCCESS if successful. ** AVRC_NO_RESOURCES if there are not enough resources to open ** the connection. ** ******************************************************************************/ UINT16 AVRC_Open(UINT8 *p_handle, tAVRC_CONN_CB *p_ccb, BD_ADDR_PTR peer_addr) { UINT16 status; tAVCT_CC cc; cc.p_ctrl_cback = avrc_ctrl_cback; /* Control callback */ cc.p_msg_cback = avrc_msg_cback; /* Message callback */ cc.pid = UUID_SERVCLASS_AV_REMOTE_CONTROL; /* Profile ID */ cc.role = p_ccb->conn; /* Initiator/acceptor role */ cc.control = p_ccb->control; /* Control role (Control/Target) */ status = AVCT_CreateConn(p_handle, &cc, peer_addr); if (status == AVCT_SUCCESS) { memcpy(&avrc_cb.ccb[*p_handle], p_ccb, sizeof(tAVRC_CONN_CB)); #if (AVRC_METADATA_INCLUDED == TRUE) memset(&avrc_cb.fcb[*p_handle], 0, sizeof(tAVRC_FRAG_CB)); memset(&avrc_cb.rcb[*p_handle], 0, sizeof(tAVRC_RASM_CB)); #endif } AVRC_TRACE_DEBUG("AVRC_Open role: %d, control:%d status:%d, handle:%d", cc.role, cc.control, status, *p_handle); return status; } /****************************************************************************** ** ** Function AVRC_Close ** ** Description Close a connection opened with AVRC_Open(). ** This function is called when the ** application is no longer using a connection. ** ** Input Parameters: ** handle: Handle of this connection. ** ** Output Parameters: ** None. ** ** Returns AVRC_SUCCESS if successful. ** AVRC_BAD_HANDLE if handle is invalid. ** ******************************************************************************/ UINT16 AVRC_Close(UINT8 handle) { AVRC_TRACE_DEBUG("AVRC_Close handle:%d", handle); return AVCT_RemoveConn(handle); } /****************************************************************************** ** ** Function AVRC_MsgReq ** ** Description This function is used to send the AVRCP byte stream in p_pkt ** down to AVCTP. ** ** It is expected that p_pkt->offset is at least AVCT_MSG_OFFSET ** p_pkt->layer_specific is AVCT_DATA_CTRL or AVCT_DATA_BROWSE ** p_pkt->event is AVRC_OP_VENDOR, AVRC_OP_PASS_THRU or AVRC_OP_BROWSE ** The above BT_HDR settings are set by the AVRC_Bld* functions. ** ** Returns AVRC_SUCCESS if successful. ** AVRC_BAD_HANDLE if handle is invalid. ** ******************************************************************************/ UINT16 AVRC_MsgReq (UINT8 handle, UINT8 label, UINT8 ctype, BT_HDR *p_pkt) { #if (AVRC_METADATA_INCLUDED == TRUE) UINT8 *p_data; UINT8 cr = AVCT_CMD; BOOLEAN chk_frag = TRUE; UINT8 *p_start = NULL; tAVRC_FRAG_CB *p_fcb; UINT16 len; if (!p_pkt) return AVRC_BAD_PARAM; AVRC_TRACE_DEBUG("%s handle = %u label = %u ctype = %u len = %d", __func__, handle, label, ctype, p_pkt->len); if (ctype >= AVRC_RSP_NOT_IMPL) cr = AVCT_RSP; if (p_pkt->event == AVRC_OP_VENDOR) { /* add AVRCP Vendor Dependent headers */ p_start = ((UINT8 *)(p_pkt + 1) + p_pkt->offset); p_pkt->offset -= AVRC_VENDOR_HDR_SIZE; p_pkt->len += AVRC_VENDOR_HDR_SIZE; p_data = (UINT8 *)(p_pkt + 1) + p_pkt->offset; *p_data++ = (ctype & AVRC_CTYPE_MASK); *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); *p_data++ = AVRC_OP_VENDOR; AVRC_CO_ID_TO_BE_STREAM(p_data, AVRC_CO_METADATA); } else if (p_pkt->event == AVRC_OP_PASS_THRU) { /* add AVRCP Pass Through headers */ p_start = ((UINT8 *)(p_pkt + 1) + p_pkt->offset); p_pkt->offset -= AVRC_PASS_THRU_SIZE; p_pkt->len += AVRC_PASS_THRU_SIZE; p_data = (UINT8 *)(p_pkt + 1) + p_pkt->offset; *p_data++ = (ctype & AVRC_CTYPE_MASK); *p_data++ = (AVRC_SUB_PANEL << AVRC_SUBTYPE_SHIFT); *p_data++ = AVRC_OP_PASS_THRU;/* opcode */ *p_data++ = AVRC_ID_VENDOR; /* operation id */ *p_data++ = 5; /* operation data len */ AVRC_CO_ID_TO_BE_STREAM(p_data, AVRC_CO_METADATA); } /* abandon previous fragments */ p_fcb = &avrc_cb.fcb[handle]; if (p_fcb->frag_enabled) p_fcb->frag_enabled = FALSE; osi_free_and_reset((void **)&p_fcb->p_fmsg); /* AVRCP spec has not defined any control channel commands that needs fragmentation at this level * check for fragmentation only on the response */ if ((cr == AVCT_RSP) && (chk_frag == TRUE)) { if (p_pkt->len > AVRC_MAX_CTRL_DATA_LEN) { int offset_len = MAX(AVCT_MSG_OFFSET, p_pkt->offset); BT_HDR *p_pkt_new = (BT_HDR *)osi_malloc(AVRC_PACKET_LEN + offset_len + BT_HDR_SIZE); if (p_start != NULL) { p_fcb->frag_enabled = TRUE; p_fcb->p_fmsg = p_pkt; p_fcb->frag_pdu = *p_start; p_pkt = p_pkt_new; p_pkt_new = p_fcb->p_fmsg; p_pkt->len = AVRC_MAX_CTRL_DATA_LEN; p_pkt->offset = p_pkt_new->offset; p_pkt->layer_specific = p_pkt_new->layer_specific; p_pkt->event = p_pkt_new->event; p_data = (UINT8 *)(p_pkt+1) + p_pkt->offset; p_start -= AVRC_VENDOR_HDR_SIZE; memcpy (p_data, p_start, AVRC_MAX_CTRL_DATA_LEN); /* use AVRC start packet type */ p_data += AVRC_VENDOR_HDR_SIZE; p_data++; /* pdu */ *p_data++ = AVRC_PKT_START; /* 4 pdu, pkt_type & len */ len = (AVRC_MAX_CTRL_DATA_LEN - AVRC_VENDOR_HDR_SIZE - AVRC_MIN_META_HDR_SIZE); UINT16_TO_BE_STREAM(p_data, len); /* prepare the left over for as an end fragment */ avrc_prep_end_frag (handle); AVRC_TRACE_DEBUG ("%s p_pkt len:%d/%d, next len:%d", __func__, p_pkt->len, len, p_fcb->p_fmsg->len ); } else { /* TODO: Is this "else" block valid? Remove it? */ AVRC_TRACE_ERROR ("AVRC_MsgReq no buffers for fragmentation" ); osi_free(p_pkt); return AVRC_NO_RESOURCES; } } } return AVCT_MsgReq( handle, label, cr, p_pkt); #else return AVRC_NO_RESOURCES; #endif } /****************************************************************************** ** ** Function AVRC_PassCmd ** ** Description Send a PASS THROUGH command to the peer device. This ** function can only be called for controller role connections. ** Any response message from the peer is passed back through ** the tAVRC_MSG_CBACK callback function. ** ** Input Parameters: ** handle: Handle of this connection. ** ** label: Transaction label. ** ** p_msg: Pointer to PASS THROUGH message structure. ** ** Output Parameters: ** None. ** ** Returns AVRC_SUCCESS if successful. ** AVRC_BAD_HANDLE if handle is invalid. ** ******************************************************************************/ UINT16 AVRC_PassCmd(UINT8 handle, UINT8 label, tAVRC_MSG_PASS *p_msg) { BT_HDR *p_buf; assert(p_msg != NULL); if (p_msg) { p_msg->hdr.ctype = AVRC_CMD_CTRL; p_buf = avrc_pass_msg(p_msg); if (p_buf) return AVCT_MsgReq( handle, label, AVCT_CMD, p_buf); } return AVRC_NO_RESOURCES; } /****************************************************************************** ** ** Function AVRC_PassRsp ** ** Description Send a PASS THROUGH response to the peer device. This ** function can only be called for target role connections. ** This function must be called when a PASS THROUGH command ** message is received from the peer through the ** tAVRC_MSG_CBACK callback function. ** ** Input Parameters: ** handle: Handle of this connection. ** ** label: Transaction label. Must be the same value as ** passed with the command message in the callback function. ** ** p_msg: Pointer to PASS THROUGH message structure. ** ** Output Parameters: ** None. ** ** Returns AVRC_SUCCESS if successful. ** AVRC_BAD_HANDLE if handle is invalid. ** ******************************************************************************/ UINT16 AVRC_PassRsp(UINT8 handle, UINT8 label, tAVRC_MSG_PASS *p_msg) { BT_HDR *p_buf; assert(p_msg != NULL); if (p_msg) { p_buf = avrc_pass_msg(p_msg); if (p_buf) return AVCT_MsgReq( handle, label, AVCT_RSP, p_buf); } return AVRC_NO_RESOURCES; }