1 /*
2 * Copyright 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <unordered_map>
18
19 #include "l2cap/cid.h"
20 #include "l2cap/classic/internal/link.h"
21 #include "l2cap/classic/security_policy.h"
22 #include "l2cap/internal/dynamic_channel_impl.h"
23 #include "l2cap/internal/sender.h"
24 #include "l2cap/psm.h"
25 #include "os/handler.h"
26 #include "os/log.h"
27
28 namespace bluetooth {
29 namespace l2cap {
30 namespace internal {
31
DynamicChannelImpl(Psm psm,Cid cid,Cid remote_cid,l2cap::internal::ILink * link,os::Handler * l2cap_handler)32 DynamicChannelImpl::DynamicChannelImpl(Psm psm, Cid cid, Cid remote_cid, l2cap::internal::ILink* link,
33 os::Handler* l2cap_handler)
34 : psm_(psm), cid_(cid), remote_cid_(remote_cid), link_(link), l2cap_handler_(l2cap_handler),
35 device_(link->GetDevice()) {
36 ASSERT(cid_ > 0);
37 ASSERT(remote_cid_ > 0);
38 ASSERT(link_ != nullptr);
39 ASSERT(l2cap_handler_ != nullptr);
40 }
41
GetDevice() const42 hci::AddressWithType DynamicChannelImpl::GetDevice() const {
43 return device_;
44 }
45
RegisterOnCloseCallback(DynamicChannel::OnCloseCallback on_close_callback)46 void DynamicChannelImpl::RegisterOnCloseCallback(DynamicChannel::OnCloseCallback on_close_callback) {
47 ASSERT_LOG(on_close_callback_.IsEmpty(), "OnCloseCallback can only be registered once");
48 // If channel is already closed, call the callback immediately without saving it
49 if (closed_) {
50 on_close_callback.Invoke(close_reason_);
51 return;
52 }
53 on_close_callback_ = std::move(on_close_callback);
54 }
55
Close()56 void DynamicChannelImpl::Close() {
57 if (link_ == nullptr) {
58 LOG_ERROR("Channel is already closed");
59 return;
60 }
61 link_->SendDisconnectionRequest(cid_, remote_cid_);
62 }
63
OnClosed(hci::ErrorCode status)64 void DynamicChannelImpl::OnClosed(hci::ErrorCode status) {
65 ASSERT_LOG(!closed_, "Device %s Cid 0x%x closed twice, old status 0x%x, new status 0x%x", device_.ToString().c_str(),
66 cid_, static_cast<int>(close_reason_), static_cast<int>(status));
67 closed_ = true;
68 close_reason_ = status;
69 link_ = nullptr;
70 l2cap_handler_ = nullptr;
71 on_close_callback_.InvokeIfNotEmpty(close_reason_);
72 on_close_callback_ = {};
73 }
74
ToString()75 std::string DynamicChannelImpl::ToString() {
76 std::ostringstream ss;
77 ss << "Device " << device_ << "Psm 0x" << std::hex << psm_ << " Cid 0x" << std::hex << cid_;
78 return ss.str();
79 }
80
81 } // namespace internal
82 } // namespace l2cap
83 } // namespace bluetooth
84