| // Copyright 2021 gRPC authors. |
| // |
| // 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 <grpc/support/port_platform.h> |
| |
| #ifndef GRPC_NO_BINDER |
| |
| #include "src/core/ext/transport/binder/client/binder_connector.h" |
| #include "src/core/lib/iomgr/port.h" |
| |
| #ifdef GRPC_HAVE_UNIX_SOCKET |
| #include <sys/un.h> |
| #endif |
| |
| #include <functional> |
| #include <map> |
| |
| #include <grpcpp/security/binder_security_policy.h> |
| |
| #include "src/core/ext/filters/client_channel/connector.h" |
| #include "src/core/ext/filters/client_channel/subchannel.h" |
| #include "src/core/ext/transport/binder/client/endpoint_binder_pool.h" |
| #include "src/core/ext/transport/binder/client/security_policy_setting.h" |
| #include "src/core/ext/transport/binder/transport/binder_transport.h" |
| #include "src/core/ext/transport/binder/wire_format/binder.h" |
| |
| namespace { |
| |
| // TODO(mingcl): Currently this does no error handling and assumes the |
| // connection always succeeds in reasonable amount of time. |
| class BinderConnector : public grpc_core::SubchannelConnector { |
| public: |
| BinderConnector() {} |
| ~BinderConnector() override {} |
| void Connect(const Args& args, Result* result, |
| grpc_closure* notify) override { |
| #ifdef GRPC_HAVE_UNIX_SOCKET |
| { |
| struct sockaddr_un* un = |
| reinterpret_cast<struct sockaddr_un*>(args.address->addr); |
| // length of identifier, including null terminator |
| size_t id_length = args.address->len - sizeof(un->sun_family); |
| // The c-style string at least will have a null terminator, and the |
| // connection id itself should not be empty |
| GPR_ASSERT(id_length >= 2); |
| // Make sure there is null terminator at the expected location before |
| // reading from it |
| GPR_ASSERT(un->sun_path[id_length - 1] == '\0'); |
| conn_id_ = un->sun_path; |
| } |
| #else |
| GPR_ASSERT(0); |
| #endif |
| gpr_log(GPR_INFO, "BinderConnector %p conn_id_ = %s", this, |
| conn_id_.c_str()); |
| |
| args_ = args; |
| GPR_ASSERT(notify_ == nullptr); |
| GPR_ASSERT(notify != nullptr); |
| notify_ = notify; |
| result_ = result; |
| |
| Ref().release(); // Ref held by the following callback |
| |
| grpc_binder::GetEndpointBinderPool()->GetEndpointBinder( |
| conn_id_, |
| std::bind(&BinderConnector::OnConnected, this, std::placeholders::_1)); |
| } |
| |
| void OnConnected(std::unique_ptr<grpc_binder::Binder> endpoint_binder) { |
| GPR_ASSERT(endpoint_binder != nullptr); |
| grpc_transport* transport = grpc_create_binder_transport_client( |
| std::move(endpoint_binder), |
| grpc_binder::GetSecurityPolicySetting()->Get(conn_id_)); |
| GPR_ASSERT(transport != nullptr); |
| result_->channel_args = grpc_channel_args_copy(args_.channel_args); |
| result_->transport = transport; |
| |
| GPR_ASSERT(notify_ != nullptr); |
| // ExecCtx is required here for running grpc_closure because this callback |
| // might be invoked from non-gRPC code |
| if (grpc_core::ExecCtx::Get() == nullptr) { |
| grpc_core::ExecCtx exec_ctx; |
| grpc_core::ExecCtx::Run(DEBUG_LOCATION, notify_, GRPC_ERROR_NONE); |
| } else { |
| grpc_core::ExecCtx::Run(DEBUG_LOCATION, notify_, GRPC_ERROR_NONE); |
| } |
| |
| Unref(); // Was referenced in BinderConnector::Connect |
| } |
| void Shutdown(grpc_error_handle error) override { (void)error; } |
| |
| private: |
| Args args_; |
| grpc_closure* notify_ = nullptr; |
| Result* result_ = nullptr; |
| |
| std::string conn_id_; |
| }; |
| |
| } // namespace |
| |
| namespace grpc_core { |
| |
| grpc_core::RefCountedPtr<grpc_core::Subchannel> |
| BinderClientChannelFactory::CreateSubchannel( |
| const grpc_resolved_address& address, const grpc_channel_args* args) { |
| gpr_log(GPR_INFO, "BinderClientChannelFactory creating subchannel %p", this); |
| grpc_arg default_authority_arg = grpc_channel_arg_string_create( |
| const_cast<char*>(GRPC_ARG_DEFAULT_AUTHORITY), |
| const_cast<char*>("binder.authority")); |
| grpc_channel_args* new_args = |
| grpc_channel_args_copy_and_add(args, &default_authority_arg, 1); |
| |
| grpc_core::RefCountedPtr<grpc_core::Subchannel> s = |
| grpc_core::Subchannel::Create( |
| grpc_core::MakeOrphanable<BinderConnector>(), address, new_args); |
| |
| return s; |
| } |
| |
| } // namespace grpc_core |
| |
| #endif // GRPC_NO_BINDER |