| /* |
| * Copyright (C) 2020 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 "pairing_client.h" |
| |
| #include <netdb.h> |
| #include <netinet/tcp.h> |
| |
| #include <atomic> |
| #include <iomanip> |
| #include <mutex> |
| #include <sstream> |
| #include <thread> |
| #include <vector> |
| |
| #include <android-base/logging.h> |
| #include <android-base/parsenetaddress.h> |
| #include <android-base/stringprintf.h> |
| #include <android-base/thread_annotations.h> |
| #include <android-base/unique_fd.h> |
| #include <cutils/sockets.h> |
| |
| namespace adb { |
| namespace pairing { |
| |
| using android::base::unique_fd; |
| |
| static void ConnectionDeleter(PairingConnectionCtx* p) { |
| pairing_connection_destroy(p); |
| } |
| using ConnectionPtr = std::unique_ptr<PairingConnectionCtx, decltype(&ConnectionDeleter)>; |
| |
| namespace { |
| |
| class PairingClientImpl : public PairingClient { |
| public: |
| explicit PairingClientImpl(const Data& pswd, const PeerInfo& peer_info, const Data& cert, |
| const Data& priv_key); |
| |
| // Starts the pairing client. This call is non-blocking. Upon pairing |
| // completion, |cb| will be called with the PeerInfo on success, |
| // or an empty value on failure. |
| // |
| // Returns true if PairingClient was successfully started. Otherwise, |
| // return false. |
| virtual bool Start(std::string_view ip_addr, pairing_client_result_cb cb, |
| void* opaque) override; |
| |
| private: |
| static ConnectionPtr CreatePairingConnection(const Data& pswd, const PeerInfo& peer_info, |
| const Data& cert, const Data& priv_key); |
| |
| static void PairingResultCallback(const PeerInfo* peer_info, int fd, void* opaque); |
| // Setup and start the PairingConnection |
| bool StartConnection(); |
| |
| enum class State { |
| Ready, |
| Running, |
| Stopped, |
| }; |
| |
| State state_ = State::Ready; |
| Data pswd_; |
| PeerInfo peer_info_; |
| Data cert_; |
| Data priv_key_; |
| std::string host_; |
| int port_; |
| |
| ConnectionPtr connection_; |
| pairing_client_result_cb cb_; |
| void* opaque_ = nullptr; |
| }; // PairingClientImpl |
| |
| // static |
| ConnectionPtr PairingClientImpl::CreatePairingConnection(const Data& pswd, |
| const PeerInfo& peer_info, |
| const Data& cert, const Data& priv_key) { |
| return ConnectionPtr( |
| pairing_connection_client_new(pswd.data(), pswd.size(), &peer_info, cert.data(), |
| cert.size(), priv_key.data(), priv_key.size()), |
| ConnectionDeleter); |
| } |
| |
| PairingClientImpl::PairingClientImpl(const Data& pswd, const PeerInfo& peer_info, const Data& cert, |
| const Data& priv_key) |
| : pswd_(pswd), |
| peer_info_(peer_info), |
| cert_(cert), |
| priv_key_(priv_key), |
| connection_(nullptr, ConnectionDeleter) { |
| CHECK(!pswd_.empty() && !cert_.empty() && !priv_key_.empty()); |
| |
| state_ = State::Ready; |
| } |
| |
| bool PairingClientImpl::Start(std::string_view ip_addr, pairing_client_result_cb cb, void* opaque) { |
| CHECK(!ip_addr.empty()); |
| cb_ = cb; |
| opaque_ = opaque; |
| |
| if (state_ != State::Ready) { |
| LOG(ERROR) << "PairingClient already running or finished"; |
| return false; |
| } |
| |
| // Try to parse the host address |
| std::string err; |
| CHECK(android::base::ParseNetAddress(std::string(ip_addr), &host_, &port_, nullptr, &err)); |
| CHECK(port_ > 0 && port_ <= 65535); |
| |
| if (!StartConnection()) { |
| LOG(ERROR) << "Unable to start PairingClient connection"; |
| state_ = State::Stopped; |
| return false; |
| } |
| |
| state_ = State::Running; |
| return true; |
| } |
| |
| static int network_connect(const std::string& host, int port, int type, int timeout, |
| std::string* error) { |
| int getaddrinfo_error = 0; |
| int fd = socket_network_client_timeout(host.c_str(), port, type, timeout, &getaddrinfo_error); |
| if (fd != -1) { |
| return fd; |
| } |
| if (getaddrinfo_error != 0) { |
| *error = android::base::StringPrintf("failed to resolve host: '%s': %s", host.c_str(), |
| gai_strerror(getaddrinfo_error)); |
| LOG(WARNING) << *error; |
| } else { |
| *error = android::base::StringPrintf("failed to connect to '%s:%d': %s", host.c_str(), port, |
| strerror(errno)); |
| LOG(WARNING) << *error; |
| } |
| return -1; |
| } |
| |
| // static |
| void PairingClientImpl::PairingResultCallback(const PeerInfo* peer_info, int /* fd */, |
| void* opaque) { |
| auto* p = reinterpret_cast<PairingClientImpl*>(opaque); |
| p->cb_(peer_info, p->opaque_); |
| } |
| |
| bool PairingClientImpl::StartConnection() { |
| std::string err; |
| const int timeout = 10; // seconds |
| unique_fd fd(network_connect(host_, port_, SOCK_STREAM, timeout, &err)); |
| if (fd.get() == -1) { |
| LOG(ERROR) << "Failed to start pairing connection client [" << err << "]"; |
| return false; |
| } |
| int off = 1; |
| setsockopt(fd.get(), IPPROTO_TCP, TCP_NODELAY, &off, sizeof(off)); |
| |
| connection_ = CreatePairingConnection(pswd_, peer_info_, cert_, priv_key_); |
| if (connection_ == nullptr) { |
| LOG(ERROR) << "PairingClient unable to create a PairingConnection"; |
| return false; |
| } |
| |
| if (!pairing_connection_start(connection_.get(), fd.release(), PairingResultCallback, this)) { |
| LOG(ERROR) << "PairingClient failed to start the PairingConnection"; |
| state_ = State::Stopped; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| } // namespace |
| |
| // static |
| std::unique_ptr<PairingClient> PairingClient::Create(const Data& pswd, const PeerInfo& peer_info, |
| const Data& cert, const Data& priv_key) { |
| CHECK(!pswd.empty()); |
| CHECK(!cert.empty()); |
| CHECK(!priv_key.empty()); |
| |
| return std::unique_ptr<PairingClient>(new PairingClientImpl(pswd, peer_info, cert, priv_key)); |
| } |
| |
| } // namespace pairing |
| } // namespace adb |