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/*
* Copyright 2019 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 <chrono>
#include <memory>
#include "hci/acl_manager.h"
#include "l2cap/classic/internal/fixed_channel_impl.h"
#include "l2cap/classic/internal/link.h"
#include "l2cap/internal/parameter_provider.h"
#include "l2cap/internal/scheduler.h"
#include "os/alarm.h"
namespace bluetooth {
namespace l2cap {
namespace classic {
namespace internal {
Link::Link(os::Handler* l2cap_handler, std::unique_ptr<hci::AclConnection> acl_connection,
std::unique_ptr<l2cap::internal::Scheduler> scheduler,
l2cap::internal::ParameterProvider* parameter_provider,
DynamicChannelServiceManagerImpl* dynamic_service_manager,
FixedChannelServiceManagerImpl* fixed_service_manager)
: l2cap_handler_(l2cap_handler), acl_connection_(std::move(acl_connection)), scheduler_(std::move(scheduler)),
parameter_provider_(parameter_provider), dynamic_service_manager_(dynamic_service_manager),
fixed_service_manager_(fixed_service_manager),
signalling_manager_(l2cap_handler_, this, dynamic_service_manager_, &dynamic_channel_allocator_,
fixed_service_manager_) {
ASSERT(l2cap_handler_ != nullptr);
ASSERT(acl_connection_ != nullptr);
ASSERT(scheduler_ != nullptr);
ASSERT(parameter_provider_ != nullptr);
link_idle_disconnect_alarm_.Schedule(common::BindOnce(&Link::Disconnect, common::Unretained(this)),
parameter_provider_->GetClassicLinkIdleDisconnectTimeout());
}
void Link::OnAclDisconnected(hci::ErrorCode status) {
fixed_channel_allocator_.OnAclDisconnected(status);
dynamic_channel_allocator_.OnAclDisconnected(status);
}
void Link::Disconnect() {
acl_connection_->Disconnect(hci::DisconnectReason::REMOTE_USER_TERMINATED_CONNECTION);
}
std::shared_ptr<FixedChannelImpl> Link::AllocateFixedChannel(Cid cid, SecurityPolicy security_policy) {
auto channel = fixed_channel_allocator_.AllocateChannel(cid, security_policy);
scheduler_->AttachChannel(cid, channel->GetQueueDownEnd());
return channel;
}
bool Link::IsFixedChannelAllocated(Cid cid) {
return fixed_channel_allocator_.IsChannelAllocated(cid);
}
Cid Link::ReserveDynamicChannel() {
return dynamic_channel_allocator_.ReserveChannel();
}
void Link::SendConnectionRequest(Psm psm, Cid local_cid) {
signalling_manager_.SendConnectionRequest(psm, local_cid);
}
void Link::SendDisconnectionRequest(Cid local_cid, Cid remote_cid) {
signalling_manager_.SendDisconnectionRequest(local_cid, remote_cid);
}
void Link::SendInformationRequest(InformationRequestInfoType type) {
signalling_manager_.SendInformationRequest(type);
}
std::shared_ptr<DynamicChannelImpl> Link::AllocateDynamicChannel(Psm psm, Cid remote_cid,
SecurityPolicy security_policy) {
auto channel = dynamic_channel_allocator_.AllocateChannel(psm, remote_cid, security_policy);
if (channel != nullptr) {
scheduler_->AttachChannel(channel->GetCid(), channel->GetQueueDownEnd());
}
return channel;
}
std::shared_ptr<DynamicChannelImpl> Link::AllocateReservedDynamicChannel(Cid reserved_cid, Psm psm, Cid remote_cid,
SecurityPolicy security_policy) {
auto channel = dynamic_channel_allocator_.AllocateReservedChannel(reserved_cid, psm, remote_cid, security_policy);
if (channel != nullptr) {
scheduler_->AttachChannel(channel->GetCid(), channel->GetQueueDownEnd());
}
return channel;
}
void Link::FreeDynamicChannel(Cid cid) {
if (dynamic_channel_allocator_.FindChannelByCid(cid) == nullptr) {
return;
}
scheduler_->DetachChannel(cid);
dynamic_channel_allocator_.FreeChannel(cid);
}
void Link::RefreshRefCount() {
int ref_count = 0;
ref_count += fixed_channel_allocator_.GetRefCount();
ref_count += dynamic_channel_allocator_.NumberOfChannels();
ASSERT_LOG(ref_count >= 0, "ref_count %d is less than 0", ref_count);
if (ref_count > 0) {
link_idle_disconnect_alarm_.Cancel();
} else {
link_idle_disconnect_alarm_.Schedule(common::BindOnce(&Link::Disconnect, common::Unretained(this)),
parameter_provider_->GetClassicLinkIdleDisconnectTimeout());
}
}
} // namespace internal
} // namespace classic
} // namespace l2cap
} // namespace bluetooth
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