Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 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 | |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 17 | #include <chrono> |
| 18 | #include <memory> |
| 19 | |
| 20 | #include "hci/acl_manager.h" |
Chris Manton | 6230a6f | 2019-11-13 18:37:33 -0800 | [diff] [blame] | 21 | #include "l2cap/classic/dynamic_channel_manager.h" |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 22 | #include "l2cap/classic/internal/fixed_channel_impl.h" |
| 23 | #include "l2cap/classic/internal/link.h" |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 24 | #include "l2cap/internal/parameter_provider.h" |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 25 | #include "os/alarm.h" |
| 26 | |
| 27 | namespace bluetooth { |
| 28 | namespace l2cap { |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 29 | namespace classic { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 30 | namespace internal { |
| 31 | |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 32 | Link::Link(os::Handler* l2cap_handler, std::unique_ptr<hci::AclConnection> acl_connection, |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 33 | l2cap::internal::ParameterProvider* parameter_provider, |
| 34 | DynamicChannelServiceManagerImpl* dynamic_service_manager, |
| 35 | FixedChannelServiceManagerImpl* fixed_service_manager) |
Hansong Zhang | 90603b3 | 2019-11-22 15:11:12 -0800 | [diff] [blame] | 36 | : l2cap_handler_(l2cap_handler), acl_connection_(std::move(acl_connection)), |
| 37 | data_pipeline_manager_(l2cap_handler, acl_connection_->GetAclQueueEnd()), parameter_provider_(parameter_provider), |
| 38 | dynamic_service_manager_(dynamic_service_manager), fixed_service_manager_(fixed_service_manager), |
Hansong Zhang | f0a1692 | 2019-11-22 21:27:08 -0800 | [diff] [blame] | 39 | signalling_manager_(l2cap_handler_, this, &data_pipeline_manager_, dynamic_service_manager_, |
| 40 | &dynamic_channel_allocator_, fixed_service_manager_) { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 41 | ASSERT(l2cap_handler_ != nullptr); |
| 42 | ASSERT(acl_connection_ != nullptr); |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 43 | ASSERT(parameter_provider_ != nullptr); |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 44 | link_idle_disconnect_alarm_.Schedule(common::BindOnce(&Link::Disconnect, common::Unretained(this)), |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 45 | parameter_provider_->GetClassicLinkIdleDisconnectTimeout()); |
| 46 | } |
| 47 | |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 48 | void Link::OnAclDisconnected(hci::ErrorCode status) { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 49 | fixed_channel_allocator_.OnAclDisconnected(status); |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 50 | dynamic_channel_allocator_.OnAclDisconnected(status); |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 51 | } |
| 52 | |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 53 | void Link::Disconnect() { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 54 | acl_connection_->Disconnect(hci::DisconnectReason::REMOTE_USER_TERMINATED_CONNECTION); |
| 55 | } |
| 56 | |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 57 | std::shared_ptr<FixedChannelImpl> Link::AllocateFixedChannel(Cid cid, SecurityPolicy security_policy) { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 58 | auto channel = fixed_channel_allocator_.AllocateChannel(cid, security_policy); |
Hansong Zhang | 90603b3 | 2019-11-22 15:11:12 -0800 | [diff] [blame] | 59 | data_pipeline_manager_.AttachChannel(cid, channel); |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 60 | return channel; |
| 61 | } |
| 62 | |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 63 | bool Link::IsFixedChannelAllocated(Cid cid) { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 64 | return fixed_channel_allocator_.IsChannelAllocated(cid); |
| 65 | } |
| 66 | |
Hansong Zhang | d1b6c9b | 2019-10-22 16:11:53 -0700 | [diff] [blame] | 67 | Cid Link::ReserveDynamicChannel() { |
| 68 | return dynamic_channel_allocator_.ReserveChannel(); |
| 69 | } |
| 70 | |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 71 | void Link::SendConnectionRequest(Psm psm, Cid local_cid) { |
| 72 | signalling_manager_.SendConnectionRequest(psm, local_cid); |
| 73 | } |
| 74 | |
Chris Manton | 6230a6f | 2019-11-13 18:37:33 -0800 | [diff] [blame] | 75 | void Link::SendConnectionRequest(Psm psm, Cid local_cid, |
| 76 | PendingDynamicChannelConnection pending_dynamic_channel_connection) { |
| 77 | local_cid_to_pending_dynamic_channel_connection_map_[local_cid] = std::move(pending_dynamic_channel_connection); |
| 78 | signalling_manager_.SendConnectionRequest(psm, local_cid); |
| 79 | } |
| 80 | |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 81 | void Link::SendDisconnectionRequest(Cid local_cid, Cid remote_cid) { |
| 82 | signalling_manager_.SendDisconnectionRequest(local_cid, remote_cid); |
| 83 | } |
| 84 | |
Chris Manton | 2480960 | 2019-10-31 14:36:02 -0700 | [diff] [blame] | 85 | void Link::SendInformationRequest(InformationRequestInfoType type) { |
| 86 | signalling_manager_.SendInformationRequest(type); |
| 87 | } |
| 88 | |
Hansong Zhang | 47dec64 | 2019-11-25 12:01:15 -0800 | [diff] [blame^] | 89 | std::shared_ptr<l2cap::internal::DynamicChannelImpl> Link::AllocateDynamicChannel(Psm psm, Cid remote_cid, |
| 90 | SecurityPolicy security_policy) { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 91 | auto channel = dynamic_channel_allocator_.AllocateChannel(psm, remote_cid, security_policy); |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 92 | if (channel != nullptr) { |
Hansong Zhang | 90603b3 | 2019-11-22 15:11:12 -0800 | [diff] [blame] | 93 | data_pipeline_manager_.AttachChannel(channel->GetCid(), channel); |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 94 | } |
Chris Manton | 6230a6f | 2019-11-13 18:37:33 -0800 | [diff] [blame] | 95 | channel->local_initiated_ = false; |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 96 | return channel; |
| 97 | } |
| 98 | |
Hansong Zhang | 47dec64 | 2019-11-25 12:01:15 -0800 | [diff] [blame^] | 99 | std::shared_ptr<l2cap::internal::DynamicChannelImpl> Link::AllocateReservedDynamicChannel( |
| 100 | Cid reserved_cid, Psm psm, Cid remote_cid, SecurityPolicy security_policy) { |
Hansong Zhang | d1b6c9b | 2019-10-22 16:11:53 -0700 | [diff] [blame] | 101 | auto channel = dynamic_channel_allocator_.AllocateReservedChannel(reserved_cid, psm, remote_cid, security_policy); |
| 102 | if (channel != nullptr) { |
Hansong Zhang | 90603b3 | 2019-11-22 15:11:12 -0800 | [diff] [blame] | 103 | data_pipeline_manager_.AttachChannel(channel->GetCid(), channel); |
Hansong Zhang | d1b6c9b | 2019-10-22 16:11:53 -0700 | [diff] [blame] | 104 | } |
Chris Manton | 6230a6f | 2019-11-13 18:37:33 -0800 | [diff] [blame] | 105 | channel->local_initiated_ = true; |
Hansong Zhang | d1b6c9b | 2019-10-22 16:11:53 -0700 | [diff] [blame] | 106 | return channel; |
| 107 | } |
| 108 | |
Hansong Zhang | a631253 | 2019-11-19 14:01:36 -0800 | [diff] [blame] | 109 | classic::DynamicChannelConfigurationOption Link::GetConfigurationForInitialConfiguration(Cid cid) { |
| 110 | ASSERT(local_cid_to_pending_dynamic_channel_connection_map_.find(cid) != |
| 111 | local_cid_to_pending_dynamic_channel_connection_map_.end()); |
| 112 | return local_cid_to_pending_dynamic_channel_connection_map_[cid].configuration_; |
Hansong Zhang | b096076 | 2019-11-14 17:57:10 -0800 | [diff] [blame] | 113 | } |
| 114 | |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 115 | void Link::FreeDynamicChannel(Cid cid) { |
| 116 | if (dynamic_channel_allocator_.FindChannelByCid(cid) == nullptr) { |
| 117 | return; |
| 118 | } |
Hansong Zhang | 90603b3 | 2019-11-22 15:11:12 -0800 | [diff] [blame] | 119 | data_pipeline_manager_.DetachChannel(cid); |
Hansong Zhang | cd0c319 | 2019-09-20 15:50:42 -0700 | [diff] [blame] | 120 | dynamic_channel_allocator_.FreeChannel(cid); |
| 121 | } |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 122 | |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 123 | void Link::RefreshRefCount() { |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 124 | int ref_count = 0; |
| 125 | ref_count += fixed_channel_allocator_.GetRefCount(); |
| 126 | ref_count += dynamic_channel_allocator_.NumberOfChannels(); |
| 127 | ASSERT_LOG(ref_count >= 0, "ref_count %d is less than 0", ref_count); |
| 128 | if (ref_count > 0) { |
| 129 | link_idle_disconnect_alarm_.Cancel(); |
| 130 | } else { |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 131 | link_idle_disconnect_alarm_.Schedule(common::BindOnce(&Link::Disconnect, common::Unretained(this)), |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 132 | parameter_provider_->GetClassicLinkIdleDisconnectTimeout()); |
| 133 | } |
| 134 | } |
| 135 | |
Hansong Zhang | a631253 | 2019-11-19 14:01:36 -0800 | [diff] [blame] | 136 | void Link::NotifyChannelCreation(Cid cid, std::unique_ptr<DynamicChannel> user_channel) { |
Chris Manton | 6230a6f | 2019-11-13 18:37:33 -0800 | [diff] [blame] | 137 | ASSERT(local_cid_to_pending_dynamic_channel_connection_map_.find(cid) != |
| 138 | local_cid_to_pending_dynamic_channel_connection_map_.end()); |
| 139 | auto& pending_dynamic_channel_connection = local_cid_to_pending_dynamic_channel_connection_map_[cid]; |
| 140 | pending_dynamic_channel_connection.handler_->Post( |
Hansong Zhang | a631253 | 2019-11-19 14:01:36 -0800 | [diff] [blame] | 141 | common::BindOnce(std::move(pending_dynamic_channel_connection.on_open_callback_), std::move(user_channel))); |
Chris Manton | 6230a6f | 2019-11-13 18:37:33 -0800 | [diff] [blame] | 142 | local_cid_to_pending_dynamic_channel_connection_map_.erase(cid); |
| 143 | } |
| 144 | |
| 145 | void Link::NotifyChannelFail(Cid cid) { |
| 146 | ASSERT(local_cid_to_pending_dynamic_channel_connection_map_.find(cid) != |
| 147 | local_cid_to_pending_dynamic_channel_connection_map_.end()); |
| 148 | auto& pending_dynamic_channel_connection = local_cid_to_pending_dynamic_channel_connection_map_[cid]; |
| 149 | // TODO(cmanton) Pass proper connection falure result to user |
| 150 | DynamicChannelManager::ConnectionResult result; |
| 151 | pending_dynamic_channel_connection.handler_->Post( |
| 152 | common::BindOnce(std::move(pending_dynamic_channel_connection.on_fail_callback_), result)); |
| 153 | local_cid_to_pending_dynamic_channel_connection_map_.erase(cid); |
| 154 | } |
| 155 | |
Hansong Zhang | 70fb464 | 2019-11-20 17:33:06 -0800 | [diff] [blame] | 156 | void Link::SetRemoteConnectionlessMtu(Mtu mtu) { |
| 157 | remote_mtu_ = mtu; |
| 158 | } |
| 159 | |
| 160 | Mtu Link::GetRemoteConnectionlessMtu() const { |
| 161 | return remote_mtu_; |
| 162 | } |
| 163 | |
| 164 | void Link::SetRemoteSupportsErtm(bool supported) { |
| 165 | remote_supports_ertm_ = supported; |
| 166 | } |
| 167 | |
| 168 | bool Link::GetRemoteSupportsErtm() const { |
| 169 | return remote_supports_ertm_; |
| 170 | } |
| 171 | |
| 172 | void Link::SetRemoteSupportsFcs(bool supported) { |
| 173 | remote_supports_fcs_ = supported; |
| 174 | } |
| 175 | |
| 176 | bool Link::GetRemoteSupportsFcs() const { |
| 177 | return remote_supports_fcs_; |
| 178 | } |
| 179 | |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 180 | } // namespace internal |
Jack He | ff38d89 | 2019-10-03 17:11:07 -0700 | [diff] [blame] | 181 | } // namespace classic |
Hansong Zhang | 80bbfc3 | 2019-09-10 16:12:05 -0700 | [diff] [blame] | 182 | } // namespace l2cap |
| 183 | } // namespace bluetooth |