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99 lines
3.2 KiB
99 lines
3.2 KiB
// |
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// Copyright 2017 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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// |
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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 "h4_protocol.h" |
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#define LOG_TAG "android.hardware.bluetooth-hci-h4" |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <log/log.h> |
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#include <sys/uio.h> |
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#include <unistd.h> |
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namespace android { |
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namespace hardware { |
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namespace bluetooth { |
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namespace hci { |
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size_t H4Protocol::Send(uint8_t type, const uint8_t* data, size_t length) { |
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struct iovec iov[] = {{&type, sizeof(type)}, |
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{const_cast<uint8_t*>(data), length}}; |
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ssize_t ret = 0; |
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do { |
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ret = TEMP_FAILURE_RETRY(writev(uart_fd_, iov, sizeof(iov) / sizeof(iov[0]))); |
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} while (-1 == ret && EAGAIN == errno); |
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if (ret == -1) { |
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ALOGE("%s error writing to UART (%s)", __func__, strerror(errno)); |
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} else if (ret < static_cast<ssize_t>(length + 1)) { |
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ALOGE("%s: %d / %d bytes written - something went wrong...", __func__, |
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static_cast<int>(ret), static_cast<int>(length + 1)); |
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} |
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return ret; |
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} |
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void H4Protocol::OnPacketReady() { |
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switch (hci_packet_type_) { |
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case HCI_PACKET_TYPE_EVENT: |
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event_cb_(hci_packetizer_.GetPacket()); |
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break; |
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case HCI_PACKET_TYPE_ACL_DATA: |
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acl_cb_(hci_packetizer_.GetPacket()); |
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break; |
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case HCI_PACKET_TYPE_SCO_DATA: |
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sco_cb_(hci_packetizer_.GetPacket()); |
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break; |
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default: |
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LOG_ALWAYS_FATAL("%s: Unimplemented packet type %d", __func__, |
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static_cast<int>(hci_packet_type_)); |
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} |
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// Get ready for the next type byte. |
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hci_packet_type_ = HCI_PACKET_TYPE_UNKNOWN; |
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} |
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void H4Protocol::OnDataReady(int fd) { |
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if (hci_packet_type_ == HCI_PACKET_TYPE_UNKNOWN) { |
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uint8_t buffer[1] = {0}; |
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ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, 1)); |
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if (bytes_read != 1) { |
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if (bytes_read == 0) { |
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LOG_ALWAYS_FATAL("%s: Unexpected EOF reading the packet type!", |
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__func__); |
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} else if (bytes_read < 0) { |
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LOG_ALWAYS_FATAL("%s: Read packet type error: %s", __func__, |
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strerror(errno)); |
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} else { |
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LOG_ALWAYS_FATAL("%s: More bytes read than expected (%u)!", __func__, |
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static_cast<unsigned int>(bytes_read)); |
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} |
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} |
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hci_packet_type_ = static_cast<HciPacketType>(buffer[0]); |
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if (hci_packet_type_ != HCI_PACKET_TYPE_ACL_DATA && |
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hci_packet_type_ != HCI_PACKET_TYPE_SCO_DATA && |
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hci_packet_type_ != HCI_PACKET_TYPE_EVENT) { |
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LOG_ALWAYS_FATAL("%s: Unimplemented packet type %d", __func__, |
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static_cast<int>(hci_packet_type_)); |
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} |
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} else { |
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hci_packetizer_.OnDataReady(fd, hci_packet_type_); |
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} |
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} |
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} // namespace hci |
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} // namespace bluetooth |
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} // namespace hardware |
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} // namespace android
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