| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <unordered_map> |
| #include <unordered_set> |
| |
| #include "l2cap/cid.h" |
| #include "l2cap/classic/internal/dynamic_channel_impl.h" |
| #include "l2cap/psm.h" |
| #include "l2cap/security_policy.h" |
| #include "os/handler.h" |
| #include "os/log.h" |
| |
| namespace bluetooth { |
| namespace l2cap { |
| namespace classic { |
| namespace internal { |
| |
| class Link; |
| |
| // Helper class for keeping channels in a Link. It allocates and frees Channel object, and supports querying whether a |
| // channel is in use |
| class DynamicChannelAllocator { |
| public: |
| DynamicChannelAllocator(Link* link, os::Handler* l2cap_handler) : link_(link), l2cap_handler_(l2cap_handler) { |
| ASSERT(link_ != nullptr); |
| ASSERT(l2cap_handler_ != nullptr); |
| } |
| |
| // Allocates a channel. If psm is used, OR the remote cid already exists, return nullptr. |
| // NOTE: The returned DynamicChannelImpl object is still owned by the channel allocator, NOT the client. |
| std::shared_ptr<DynamicChannelImpl> AllocateChannel(Psm psm, Cid remote_cid, SecurityPolicy security_policy); |
| |
| std::shared_ptr<DynamicChannelImpl> AllocateReservedChannel(Cid reserved_cid, Psm psm, Cid remote_cid, |
| SecurityPolicy security_policy); |
| |
| // Gives an unused Cid to be used for opening a channel. If a channel is used, call AllocateReservedChannel. If no |
| // longer needed, use FreeChannel. |
| Cid ReserveChannel(); |
| |
| // Frees a channel. If psm doesn't exist, it will crash |
| void FreeChannel(Cid cid); |
| |
| bool IsPsmUsed(Psm psm) const; |
| |
| std::shared_ptr<DynamicChannelImpl> FindChannelByCid(Cid cid); |
| std::shared_ptr<DynamicChannelImpl> FindChannelByRemoteCid(Cid cid); |
| |
| // Returns number of open, but not reserved channels |
| size_t NumberOfChannels() const; |
| |
| void OnAclDisconnected(hci::ErrorCode hci_status); |
| |
| private: |
| Link* link_; |
| os::Handler* l2cap_handler_; |
| std::unordered_set<Cid> used_cid_; |
| std::unordered_map<Cid, std::shared_ptr<DynamicChannelImpl>> channels_; |
| std::unordered_set<Cid> used_remote_cid_; |
| }; |
| |
| } // namespace internal |
| } // namespace classic |
| } // namespace l2cap |
| } // namespace bluetooth |