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/*
* Copyright 2018 The Android Open Source Project
*
* 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.
*/
#include "connection_handler.h"
#include <base/bind.h>
#include <base/logging.h>
#include <map>
#include "avrc_defs.h"
#include "avrcp_message_converter.h"
#include "avrcp_packet.h"
#include "bt_types.h"
#include "btu.h"
// TODO (apanicke): Remove dependency on this header once we cleanup feature
// handling.
#include "bta/include/bta_av_api.h"
#include "device/include/interop.h"
#include "osi/include/allocator.h"
#include "osi/include/properties.h"
namespace bluetooth {
namespace avrcp {
ConnectionHandler* ConnectionHandler::instance_ = nullptr;
ConnectionHandler* ConnectionHandler::Get() {
CHECK(instance_);
return instance_;
}
bool IsAbsoluteVolumeEnabled(const RawAddress* bdaddr) {
char volume_disabled[PROPERTY_VALUE_MAX] = {0};
osi_property_get("persist.bluetooth.disableabsvol", volume_disabled, "false");
if (strncmp(volume_disabled, "true", 4) == 0) {
LOG(INFO) << "Absolute volume disabled by property";
return false;
}
if (interop_match_addr(INTEROP_DISABLE_ABSOLUTE_VOLUME, bdaddr)) {
LOG(INFO) << "Absolute volume disabled by IOP table";
return false;
}
return true;
}
bool ConnectionHandler::Initialize(const ConnectionCallback& callback,
AvrcpInterface* avrcp, SdpInterface* sdp,
VolumeInterface* vol) {
CHECK(instance_ == nullptr);
CHECK(avrcp != nullptr);
CHECK(sdp != nullptr);
// TODO (apanicke): When transitioning to using this service, implement
// SDP Initialization for AVRCP Here.
instance_ = new ConnectionHandler();
instance_->connection_cb_ = callback;
instance_->avrc_ = avrcp;
instance_->sdp_ = sdp;
instance_->vol_ = vol;
// Set up the AVRCP acceptor connection
if (!instance_->AvrcpConnect(false, RawAddress::kAny)) {
instance_->CleanUp();
return false;
}
return true;
}
bool ConnectionHandler::CleanUp() {
CHECK(instance_ != nullptr);
// TODO (apanicke): Cleanup the SDP Entries here
for (const auto& entry : instance_->device_map_) {
entry.second->DeviceDisconnected();
instance_->avrc_->Close(entry.first);
}
instance_->device_map_.clear();
instance_->feature_map_.clear();
instance_->weak_ptr_factory_.InvalidateWeakPtrs();
delete instance_;
instance_ = nullptr;
return true;
}
void ConnectionHandler::InitForTesting(ConnectionHandler* handler) {
CHECK(instance_ == nullptr);
instance_ = handler;
}
bool ConnectionHandler::ConnectDevice(const RawAddress& bdaddr) {
LOG(INFO) << "Attempting to connect to device " << bdaddr;
for (const auto& pair : device_map_) {
if (bdaddr == pair.second->GetAddress()) {
LOG(WARNING) << "Already connected to device with address " << bdaddr;
return false;
}
}
auto connection_lambda = [](ConnectionHandler* instance_,
const RawAddress& bdaddr, uint16_t status,
uint16_t version, uint16_t features) {
LOG(INFO) << __PRETTY_FUNCTION__
<< " SDP Completed features=" << loghex(features);
if (status != AVRC_SUCCESS || !(features & BTA_AV_FEAT_RCCT)) {
LOG(ERROR) << "Failed to do SDP: status=" << loghex(status)
<< " features=" << loghex(features)
<< " supports controller: " << (features & BTA_AV_FEAT_RCCT);
instance_->connection_cb_.Run(std::shared_ptr<Device>());
}
instance_->feature_map_.emplace(bdaddr, features);
instance_->AvrcpConnect(true, bdaddr);
return;
};
return SdpLookup(bdaddr, base::Bind(connection_lambda, this, bdaddr));
}
bool ConnectionHandler::DisconnectDevice(const RawAddress& bdaddr) {
for (auto it = device_map_.begin(); it != device_map_.end(); it++) {
if (bdaddr == it->second->GetAddress()) {
it->second->DeviceDisconnected();
uint8_t handle = it->first;
device_map_.erase(handle);
return avrc_->Close(handle) == AVRC_SUCCESS;
}
}
return false;
}
std::vector<std::shared_ptr<Device>> ConnectionHandler::GetListOfDevices()
const {
std::vector<std::shared_ptr<Device>> list;
for (auto device : device_map_) {
list.push_back(device.second);
}
return list;
}
bool ConnectionHandler::SdpLookup(const RawAddress& bdaddr, SdpCallback cb) {
LOG(INFO) << __PRETTY_FUNCTION__;
tAVRC_SDP_DB_PARAMS db_params;
// TODO (apanicke): This needs to be replaced with smarter memory management.
tSDP_DISCOVERY_DB* disc_db =
(tSDP_DISCOVERY_DB*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
uint16_t attr_list[] = {ATTR_ID_SERVICE_CLASS_ID_LIST,
ATTR_ID_BT_PROFILE_DESC_LIST,
ATTR_ID_SUPPORTED_FEATURES};
db_params.db_len =
BT_DEFAULT_BUFFER_SIZE; // Some magic number found in the AVRCP code
db_params.num_attr = sizeof(attr_list) / sizeof(attr_list[0]);
db_params.p_db = disc_db;
db_params.p_attrs = attr_list;
return avrc_->FindService(
UUID_SERVCLASS_AV_REMOTE_CONTROL, bdaddr, &db_params,
base::Bind(&ConnectionHandler::SdpCb, base::Unretained(this),
bdaddr, cb, disc_db)) == AVRC_SUCCESS;
}
bool ConnectionHandler::AvrcpConnect(bool initiator, const RawAddress& bdaddr) {
LOG(INFO) << "Connect to device " << bdaddr.ToString();
tAVRC_CONN_CB open_cb;
if (initiator) {
open_cb.ctrl_cback = base::Bind(&ConnectionHandler::InitiatorControlCb,
weak_ptr_factory_.GetWeakPtr());
} else {
open_cb.ctrl_cback = base::Bind(&ConnectionHandler::AcceptorControlCb,
weak_ptr_factory_.GetWeakPtr());
}
open_cb.msg_cback =
base::Bind(&ConnectionHandler::MessageCb, base::Unretained(this));
open_cb.company_id = AVRC_CO_GOOGLE;
open_cb.conn = initiator ? AVRC_CONN_INT
: AVRC_CONN_ACP; // 0 if initiator, 1 if acceptor
// TODO (apanicke): We shouldn't need RCCT to do absolute volume. The current
// AVRC_API requires it though.
open_cb.control = BTA_AV_FEAT_RCTG | BTA_AV_FEAT_RCCT | BTA_AV_FEAT_METADATA;
uint8_t handle = 0;
uint16_t status = avrc_->Open(&handle, &open_cb, bdaddr);
LOG(INFO) << __PRETTY_FUNCTION__ << ": handle=" << loghex(handle)
<< " status= " << loghex(status);
return status == AVRC_SUCCESS;
}
void ConnectionHandler::InitiatorControlCb(uint8_t handle, uint8_t event,
uint16_t result,
const RawAddress* peer_addr) {
DCHECK(!connection_cb_.is_null());
LOG(INFO) << __PRETTY_FUNCTION__ << ": handle=" << loghex(handle)
<< " result=" << loghex(result)
<< " addr=" << (peer_addr ? peer_addr->ToString() : "none");
switch (event) {
case AVRC_OPEN_IND_EVT: {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Connection Opened Event";
const auto& feature_iter = feature_map_.find(*peer_addr);
if (feature_iter == feature_map_.end()) {
LOG(ERROR) << "Features do not exist even though SDP should have been "
"done first";
return;
}
bool supports_browsing = feature_iter->second & BTA_AV_FEAT_BROWSE;
if (supports_browsing) {
avrc_->OpenBrowse(handle, AVCT_INT);
}
// TODO (apanicke): Implement a system to cache SDP entries. For most
// devices SDP is completed after the device connects AVRCP so that
// information isn't very useful when trying to control our
// capabilities. For now always use AVRCP 1.6.
auto&& callback = base::Bind(&ConnectionHandler::SendMessage,
base::Unretained(this), handle);
auto&& ctrl_mtu = avrc_->GetPeerMtu(handle) - AVCT_HDR_LEN;
auto&& browse_mtu = avrc_->GetBrowseMtu(handle) - AVCT_HDR_LEN;
std::shared_ptr<Device> newDevice = std::make_shared<Device>(
*peer_addr, !supports_browsing, callback, ctrl_mtu, browse_mtu);
device_map_[handle] = newDevice;
// TODO (apanicke): Create the device with all of the interfaces it
// needs. Return the new device where the service will register the
// interfaces it needs.
connection_cb_.Run(newDevice);
if (feature_iter->second & BTA_AV_FEAT_ADV_CTRL) {
newDevice->RegisterVolumeChanged();
} else if (instance_->vol_ != nullptr) {
instance_->vol_->DeviceConnected(newDevice->GetAddress());
}
} break;
case AVRC_CLOSE_IND_EVT: {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Connection Closed Event";
if (device_map_.find(handle) == device_map_.end()) {
LOG(WARNING)
<< "Connection Close received from device that doesn't exist";
return;
}
avrc_->Close(handle);
feature_map_.erase(device_map_[handle]->GetAddress());
device_map_[handle]->DeviceDisconnected();
device_map_.erase(handle);
} break;
case AVRC_BROWSE_OPEN_IND_EVT:
LOG(INFO) << __PRETTY_FUNCTION__ << ": Browse Open Event";
// NOTE (apanicke): We don't need to explicitly handle this message
// since the AVCTP Layer will still send us browsing messages
// regardless. It would be useful to note this though for future
// compatibility issues.
break;
case AVRC_BROWSE_CLOSE_IND_EVT:
LOG(INFO) << __PRETTY_FUNCTION__ << ": Browse Close Event";
break;
default:
LOG(ERROR) << "Unknown AVRCP Control event";
break;
}
}
void ConnectionHandler::AcceptorControlCb(uint8_t handle, uint8_t event,
uint16_t result,
const RawAddress* peer_addr) {
DCHECK(!connection_cb_.is_null());
LOG(INFO) << __PRETTY_FUNCTION__ << ": handle=" << loghex(handle)
<< " result=" << loghex(result)
<< " addr=" << (peer_addr ? peer_addr->ToString() : "none");
switch (event) {
case AVRC_OPEN_IND_EVT: {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Connection Opened Event";
auto&& callback = base::Bind(&ConnectionHandler::SendMessage,
base::Unretained(this), handle);
auto&& ctrl_mtu = avrc_->GetPeerMtu(handle) - AVCT_HDR_LEN;
auto&& browse_mtu = avrc_->GetBrowseMtu(handle) - AVCT_HDR_LEN;
std::shared_ptr<Device> newDevice = std::make_shared<Device>(
*peer_addr, false, callback, ctrl_mtu, browse_mtu);
device_map_[handle] = newDevice;
connection_cb_.Run(newDevice);
LOG(INFO) << __PRETTY_FUNCTION__
<< ": Performing SDP on connected device. address="
<< peer_addr->ToString();
auto sdp_lambda = [](ConnectionHandler* instance_, uint8_t handle,
uint16_t status, uint16_t version,
uint16_t features) {
if (instance_->device_map_.find(handle) ==
instance_->device_map_.end()) {
LOG(WARNING) << __PRETTY_FUNCTION__
<< ": No device found for handle: " << loghex(handle);
return;
}
auto device = instance_->device_map_[handle];
instance_->feature_map_.emplace(device->GetAddress(), features);
// TODO (apanicke): Report to the VolumeInterface that a new Device is
// connected that doesn't support absolute volume.
if (features & BTA_AV_FEAT_ADV_CTRL) {
device->RegisterVolumeChanged();
} else if (instance_->vol_ != nullptr) {
instance_->vol_->DeviceConnected(device->GetAddress());
}
};
SdpLookup(*peer_addr, base::Bind(sdp_lambda, this, handle));
avrc_->OpenBrowse(handle, AVCT_ACP);
AvrcpConnect(false, RawAddress::kAny);
} break;
case AVRC_CLOSE_IND_EVT: {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Connection Closed Event";
if (device_map_.find(handle) == device_map_.end()) {
LOG(WARNING)
<< "Connection Close received from device that doesn't exist";
return;
}
avrc_->Close(handle);
feature_map_.erase(device_map_[handle]->GetAddress());
device_map_[handle]->DeviceDisconnected();
device_map_.erase(handle);
} break;
case AVRC_BROWSE_OPEN_IND_EVT:
LOG(INFO) << __PRETTY_FUNCTION__ << ": Browse Open Event";
// NOTE (apanicke): We don't need to explicitly handle this message
// since the AVCTP Layer will still send us browsing messages
// regardless. It would be useful to note this though for future
// compatibility issues.
break;
case AVRC_BROWSE_CLOSE_IND_EVT:
LOG(INFO) << __PRETTY_FUNCTION__ << ": Browse Close Event";
break;
default:
LOG(ERROR) << "Unknown AVRCP Control event";
break;
}
}
void ConnectionHandler::MessageCb(uint8_t handle, uint8_t label, uint8_t opcode,
tAVRC_MSG* p_msg) {
if (device_map_[handle] == nullptr) {
LOG(ERROR) << "Message received for unconnected device: handle="
<< loghex(handle);
return;
}
auto pkt = AvrcpMessageConverter::Parse(p_msg);
if (opcode == AVRC_OP_BROWSE) {
VLOG(4) << "Browse Message received on handle " << (unsigned int)handle;
device_map_[handle]->BrowseMessageReceived(label, BrowsePacket::Parse(pkt));
return;
}
VLOG(4) << "Message received on handle " << (unsigned int)handle;
device_map_[handle]->MessageReceived(label, Packet::Parse(pkt));
}
void ConnectionHandler::SdpCb(const RawAddress& bdaddr, SdpCallback cb,
tSDP_DISCOVERY_DB* disc_db, uint16_t status) {
LOG(INFO) << __PRETTY_FUNCTION__ << ": SDP lookup callback received";
if (status != AVRC_SUCCESS) {
LOG(ERROR) << __PRETTY_FUNCTION__
<< ": SDP Failure: status = " << (unsigned int)status;
cb.Run(status, 0, 0);
osi_free(disc_db);
return;
}
// Check the peer features
tSDP_DISC_REC* sdp_record = nullptr;
uint16_t peer_features = 0;
uint16_t peer_avrcp_version = 0;
// TODO (apanicke): Replace this in favor of our own supported features.
sdp_record =
sdp_->FindServiceInDb(disc_db, UUID_SERVCLASS_AV_REMOTE_CONTROL, nullptr);
if (sdp_record != nullptr) {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " supports remote control";
peer_features |= BTA_AV_FEAT_RCCT;
if ((sdp_->FindAttributeInRec(sdp_record, ATTR_ID_BT_PROFILE_DESC_LIST)) !=
NULL) {
/* get profile version (if failure, version parameter is not updated) */
sdp_->FindProfileVersionInRec(
sdp_record, UUID_SERVCLASS_AV_REMOTE_CONTROL, &peer_avrcp_version);
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " peer avrcp version=" << loghex(peer_avrcp_version);
if (peer_avrcp_version >= AVRC_REV_1_3) {
// These are the standard features, another way to check this is to
// search for CAT1 on the remote device
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " supports metadata";
peer_features |= (BTA_AV_FEAT_VENDOR | BTA_AV_FEAT_METADATA);
}
if (peer_avrcp_version >= AVRC_REV_1_4) {
/* get supported categories */
LOG(INFO) << __PRETTY_FUNCTION__ << " Get Supported categories";
tSDP_DISC_ATTR* sdp_attribute =
sdp_->FindAttributeInRec(sdp_record, ATTR_ID_SUPPORTED_FEATURES);
if (sdp_attribute != NULL) {
LOG(INFO) << __PRETTY_FUNCTION__
<< "Get Supported categories SDP ATTRIBUTES != null";
uint16_t categories = sdp_attribute->attr_value.v.u16;
if (categories & AVRC_SUPF_CT_CAT2) {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " supports advanced control";
if (IsAbsoluteVolumeEnabled(&bdaddr)) {
peer_features |= (BTA_AV_FEAT_ADV_CTRL);
}
}
if (categories & AVRC_SUPF_CT_BROWSE) {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " supports browsing";
peer_features |= (BTA_AV_FEAT_BROWSE);
}
}
}
}
}
sdp_record = sdp_->FindServiceInDb(disc_db, UUID_SERVCLASS_AV_REM_CTRL_TARGET,
nullptr);
if (sdp_record != nullptr) {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " supports remote control target";
uint16_t peer_avrcp_target_version = 0;
sdp_->FindProfileVersionInRec(sdp_record, UUID_SERVCLASS_AV_REMOTE_CONTROL,
&peer_avrcp_target_version);
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " peer avrcp target version="
<< loghex(peer_avrcp_target_version);
if ((sdp_->FindAttributeInRec(sdp_record, ATTR_ID_BT_PROFILE_DESC_LIST)) !=
NULL) {
if (peer_avrcp_target_version >= AVRC_REV_1_4) {
/* get supported categories */
LOG(INFO) << __PRETTY_FUNCTION__ << " Get Supported categories";
tSDP_DISC_ATTR* sdp_attribute =
sdp_->FindAttributeInRec(sdp_record, ATTR_ID_SUPPORTED_FEATURES);
if (sdp_attribute != NULL) {
LOG(INFO) << __PRETTY_FUNCTION__
<< "Get Supported categories SDP ATTRIBUTES != null";
uint16_t categories = sdp_attribute->attr_value.v.u16;
if (categories & AVRC_SUPF_CT_CAT2) {
LOG(INFO) << __PRETTY_FUNCTION__ << ": Device " << bdaddr.ToString()
<< " supports advanced control";
if (IsAbsoluteVolumeEnabled(&bdaddr)) {
peer_features |= (BTA_AV_FEAT_ADV_CTRL);
}
}
}
}
}
}
osi_free(disc_db);
cb.Run(status, peer_avrcp_version, peer_features);
}
void ConnectionHandler::SendMessage(
uint8_t handle, uint8_t label, bool browse,
std::unique_ptr<::bluetooth::PacketBuilder> message) {
std::shared_ptr<::bluetooth::Packet> packet = VectorPacket::Make();
message->Serialize(packet);
uint8_t ctype = AVRC_RSP_ACCEPT;
if (!browse) {
ctype =
(uint8_t)(::bluetooth::Packet::Specialize<Packet>(packet)->GetCType());
}
DLOG(INFO) << "SendMessage to handle=" << loghex(handle);
BT_HDR* pkt = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
pkt->offset = AVCT_MSG_OFFSET;
// TODO (apanicke): Update this constant. Currently this is a unique event
// used to tell the AVRCP API layer that the data is properly formatted and
// doesn't need to be processed. In the future, this is the only place sending
// the packet so none of these layer specific fields will be used.
pkt->event = 0xFFFF;
// TODO (apanicke): This layer specific stuff can go away once we move over
// to the new service.
pkt->layer_specific = AVCT_DATA_CTRL;
if (browse) {
pkt->layer_specific = AVCT_DATA_BROWSE;
}
pkt->len = packet->size();
uint8_t* p_data = (uint8_t*)(pkt + 1) + pkt->offset;
for (auto it = packet->begin(); it != packet->end(); it++) {
*p_data++ = *it;
}
avrc_->MsgReq(handle, label, ctype, pkt);
}
} // namespace avrcp
} // namespace bluetooth