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 {.headerSize = 4, .dataLengthOffset = 2, .dataLengthSize = 2}, /* HCI_PACKET_TYPE_ISO_DATA */
41 };
42
GetPacketHeaderInfo(HciPacketType packetType)43 const PacketHeader &HciProtocol::GetPacketHeaderInfo(HciPacketType packetType)
44 {
45 if (packetType >= HCI_PACKET_TYPE_MAX) {
46 return header_[HCI_PACKET_TYPE_UNKNOWN];
47 }
48 return header_[packetType];
49 }
50
Read(int fd,uint8_t * data,size_t length)51 ssize_t HciProtocol::Read(int fd, uint8_t *data, size_t length)
52 {
53 const int bufsize = 256;
54 char buf[bufsize] = {0};
55 ssize_t ret = TEMP_FAILURE_RETRY(read(fd, data, length));
56 if (ret == -1) {
57 strerror_r(errno, buf, sizeof(buf));
58 HDF_LOGE("read failed err:%s", buf);
59 ret = 0;
60 }
61 return ret;
62 }
63
Write(int fd,const uint8_t * data,size_t length)64 ssize_t HciProtocol::Write(int fd, const uint8_t *data, size_t length)
65 {
66 const int bufsize = 256;
67 char buf[bufsize] = {0};
68 ssize_t ret = 0;
69 do {
70 ret = TEMP_FAILURE_RETRY(write(fd, data, length));
71 } while (ret == -1 && errno == EAGAIN);
72
73 if (ret == -1) {
74 strerror_r(errno, buf, sizeof(buf));
75 HDF_LOGE("write failed err:%s", buf);
76 } else if (static_cast<size_t>(ret) != length) {
77 HDF_LOGE("write data %zd less than %zu.", ret, length);
78 }
79 return ret;
80 }
81 } // namespace Hci
82 } // namespace Bluetooth
83 } // namespace HDI
84 } // namespace OHOS