102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <fcntl.h>
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#include <poll.h>
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#include <unistd.h>
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#include <ios>
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#include <mutex>
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#include <android-base/logging.h>
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#include <gflags/gflags.h>
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#include <thread>
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#include "common/libs/fs/shared_buf.h"
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#include "common/libs/fs/shared_fd.h"
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#include "host/libs/config/cuttlefish_config.h"
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#include "host/libs/config/logging.h"
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// Copied from net/bluetooth/hci.h
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#define HCI_MAX_ACL_SIZE 1024
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#define HCI_MAX_FRAME_SIZE (HCI_MAX_ACL_SIZE + 4)
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// Include H4 header byte, and reserve more buffer size in the case of excess
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// packet.
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constexpr const size_t kBufferSize = (HCI_MAX_FRAME_SIZE + 1) * 2;
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DEFINE_int32(bt_in, -1, "A pipe for bt communication");
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DEFINE_int32(bt_out, -1, "A pipe for bt communication");
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DEFINE_int32(hci_port, -1, "A port for bt hci command");
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DEFINE_int32(link_port, -1, "A pipe for bt link layer command");
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DEFINE_int32(test_port, -1, "A pipe for rootcanal test channel");
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void openSocket(cuttlefish::SharedFD* fd, int port) {
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static std::mutex mutex;
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std::unique_lock<std::mutex> lock(mutex);
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*fd = cuttlefish::SharedFD::SocketLocalClient(port, SOCK_STREAM);
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}
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int main(int argc, char** argv) {
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cuttlefish::DefaultSubprocessLogging(argv);
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gflags::ParseCommandLineFlags(&argc, &argv, true);
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auto bt_in = cuttlefish::SharedFD::Dup(FLAGS_bt_in);
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if (!bt_in->IsOpen()) {
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LOG(ERROR) << "Error dupping fd " << FLAGS_bt_in << ": "
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<< bt_in->StrError();
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return 1;
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}
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close(FLAGS_bt_in);
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auto bt_out = cuttlefish::SharedFD::Dup(FLAGS_bt_out);
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if (!bt_out->IsOpen()) {
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LOG(ERROR) << "Error dupping fd " << FLAGS_bt_out << ": "
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<< bt_out->StrError();
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return 1;
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}
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close(FLAGS_bt_out);
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cuttlefish::SharedFD sock;
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openSocket(&sock, FLAGS_hci_port);
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auto guest_to_host = std::thread([&]() {
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while (true) {
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char buf[kBufferSize];
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auto read = bt_in->Read(buf, sizeof(buf));
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while (cuttlefish::WriteAll(sock, buf, read) == -1) {
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LOG(ERROR) << "failed to write to socket, retry.";
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// Wait for the host process to be ready
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sleep(1);
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openSocket(&sock, FLAGS_hci_port);
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}
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}
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});
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auto host_to_guest = std::thread([&]() {
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while (true) {
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char buf[kBufferSize];
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auto read = sock->Read(buf, sizeof(buf));
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if (read == -1) {
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LOG(ERROR) << "failed to read from socket, retry.";
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// Wait for the host process to be ready
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sleep(1);
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openSocket(&sock, FLAGS_hci_port);
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continue;
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}
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cuttlefish::WriteAll(bt_out, buf, read);
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}
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});
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guest_to_host.join();
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host_to_guest.join();
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}
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