| // |
| // Copyright 2017 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 "h4_packetizer.h" |
| |
| #include <cerrno> |
| #include <dlfcn.h> |
| #include <fcntl.h> |
| #include <sys/uio.h> |
| #include <unistd.h> |
| |
| #include "os/log.h" |
| #include "osi/include/osi.h" |
| |
| namespace test_vendor_lib { |
| |
| H4Packetizer::H4Packetizer(int fd, PacketReadCallback command_cb, |
| PacketReadCallback event_cb, |
| PacketReadCallback acl_cb, PacketReadCallback sco_cb, |
| PacketReadCallback iso_cb, |
| ClientDisconnectCallback disconnect_cb) |
| : uart_fd_(fd), |
| h4_parser_(command_cb, event_cb, acl_cb, sco_cb, iso_cb), |
| disconnect_cb_(std::move(disconnect_cb)) {} |
| |
| size_t H4Packetizer::Send(uint8_t type, const uint8_t* data, size_t length) { |
| struct iovec iov[] = {{&type, sizeof(type)}, {const_cast<uint8_t*>(data), length}}; |
| ssize_t ret = 0; |
| do { |
| OSI_NO_INTR(ret = writev(uart_fd_, iov, sizeof(iov) / sizeof(iov[0]))); |
| } while (-1 == ret && EAGAIN == errno); |
| |
| if (ret == -1) { |
| LOG_ERROR("Error writing to UART (%s)", strerror(errno)); |
| } else if (ret < static_cast<ssize_t>(length + 1)) { |
| LOG_ERROR("%d / %d bytes written - something went wrong...", |
| static_cast<int>(ret), static_cast<int>(length + 1)); |
| } |
| return ret; |
| } |
| |
| |
| void H4Packetizer::OnDataReady(int fd) { |
| if (disconnected_) return; |
| ssize_t bytes_to_read = h4_parser_.BytesRequested(); |
| std::vector<uint8_t> buffer(bytes_to_read); |
| |
| ssize_t bytes_read; |
| OSI_NO_INTR(bytes_read = read(fd, buffer.data(), bytes_to_read)); |
| if (bytes_read == 0) { |
| LOG_INFO("remote disconnected!"); |
| disconnected_ = true; |
| disconnect_cb_(); |
| return; |
| } else if (bytes_read < 0) { |
| if (errno == EAGAIN) { |
| // No data, try again later. |
| return; |
| } else if (errno == ECONNRESET) { |
| // They probably rejected our packet |
| disconnected_ = true; |
| disconnect_cb_(); |
| return; |
| } else { |
| LOG_ALWAYS_FATAL("Read error in %d: %s", h4_parser_.CurrentState(), |
| strerror(errno)); |
| } |
| } |
| h4_parser_.Consume(buffer.data(), bytes_read); |
| } |
| |
| } // namespace test_vendor_lib |