1/*
2 * Copyright (C) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "hci_protocol.h"
17
18#include <cerrno>
19#include <cstring>
20
21#include <unistd.h>
22
23#include <hdf_log.h>
24
25#ifdef LOG_DOMAIN
26#undef LOG_DOMAIN
27#endif
28#define LOG_DOMAIN 0xD000105
29
30namespace OHOS {
31namespace HDI {
32namespace Bluetooth {
33namespace Hci {
34const PacketHeader HciProtocol::header_[HCI_PACKET_TYPE_MAX] = {
35    {.headerSize = 0, .dataLengthOffset = 0, .dataLengthSize = 0}, /* HCI_PACKET_TYPE_UNKNOWN */
36    {.headerSize = 3, .dataLengthOffset = 2, .dataLengthSize = 1}, /* HCI_PACKET_TYPE_COMMAND */
37    {.headerSize = 4, .dataLengthOffset = 2, .dataLengthSize = 2}, /* HCI_PACKET_TYPE_ACL_DATA */
38    {.headerSize = 3, .dataLengthOffset = 2, .dataLengthSize = 1}, /* HCI_PACKET_TYPE_SCO_DATA */
39    {.headerSize = 2, .dataLengthOffset = 1, .dataLengthSize = 1}, /* HCI_PACKET_TYPE_EVENT */
40};
41
42const PacketHeader &HciProtocol::GetPacketHeaderInfo(HciPacketType packetType)
43{
44    if (packetType >= HCI_PACKET_TYPE_MAX) {
45        return header_[HCI_PACKET_TYPE_UNKNOWN];
46    }
47    return header_[packetType];
48}
49
50ssize_t HciProtocol::Read(int fd, uint8_t *data, size_t length)
51{
52    const int bufsize = 256;
53    char buf[bufsize] = {0};
54    ssize_t ret = TEMP_FAILURE_RETRY(read(fd, data, length));
55    if (ret == -1) {
56        strerror_r(errno, buf, sizeof(buf));
57        HDF_LOGE("read failed err:%s", buf);
58        ret = 0;
59    }
60    return ret;
61}
62
63ssize_t HciProtocol::Write(int fd, const uint8_t *data, size_t length)
64{
65    const int bufsize = 256;
66    char buf[bufsize] = {0};
67    ssize_t ret = 0;
68    do {
69        ret = TEMP_FAILURE_RETRY(write(fd, data, length));
70    } while (ret == -1 && errno == EAGAIN);
71
72    if (ret == -1) {
73        strerror_r(errno, buf, sizeof(buf));
74        HDF_LOGE("write failed err:%s", buf);
75    } else if (static_cast<size_t>(ret) != length) {
76        HDF_LOGE("write data %zd less than %zu.", ret, length);
77    }
78    return ret;
79}
80}  // namespace Hci
81}  // namespace Bluetooth
82}  // namespace HDI
83}  // namespace OHOS