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
30 namespace OHOS {
31 namespace HDI {
32 namespace Bluetooth {
33 namespace Hci {
34 const 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
GetPacketHeaderInfo(HciPacketType packetType)42 const 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
Read(int fd,uint8_t * data,size_t length)50 ssize_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
Write(int fd,const uint8_t * data,size_t length)63 ssize_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