1 /*
2 * Copyright (c) 2022-2024 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 "dscreen_sink_stub.h"
17
18 #include "accesstoken_kit.h"
19 #include "dscreen_constants.h"
20 #include "dscreen_errcode.h"
21 #include "dscreen_ipc_interface_code.h"
22 #include "dscreen_log.h"
23 #include "ipc_skeleton.h"
24
25 namespace OHOS {
26 namespace DistributedHardware {
DScreenSinkStub()27 DScreenSinkStub::DScreenSinkStub() {}
28
HasEnableDHPermission()29 bool DScreenSinkStub::HasEnableDHPermission()
30 {
31 Security::AccessToken::AccessTokenID callerToken = IPCSkeleton::GetCallingTokenID();
32 const std::string permissionName = "ohos.permission.ENABLE_DISTRIBUTED_HARDWARE";
33 int32_t result = Security::AccessToken::AccessTokenKit::VerifyAccessToken(callerToken,
34 permissionName);
35 return (result == Security::AccessToken::PERMISSION_GRANTED);
36 }
37
OnRemoteRequest(uint32_t code,MessageParcel & data,MessageParcel & reply,MessageOption & option)38 int32_t DScreenSinkStub::OnRemoteRequest(uint32_t code, MessageParcel &data, MessageParcel &reply,
39 MessageOption &option)
40 {
41 std::u16string desc = DScreenSinkStub::GetDescriptor();
42 std::u16string remoteDesc = data.ReadInterfaceToken();
43 if (desc != remoteDesc) {
44 DHLOGE("DScreenSinkStub::OnRemoteRequest remoteDesc is invalid!");
45 return ERR_INVALID_DATA;
46 }
47
48 switch (static_cast<IDScreenSinkInterfaceCode>(code)) {
49 case IDScreenSinkInterfaceCode::INIT_SINK:
50 return InitSinkInner(data, reply, option);
51 case IDScreenSinkInterfaceCode::RELEASE_SINK:
52 return ReleaseSinkInner(data, reply, option);
53 case IDScreenSinkInterfaceCode::SUBSCRIBE_DISTRIBUTED_HARDWARE:
54 return SubscribeDistributedHardwareInner(data, reply, option);
55 case IDScreenSinkInterfaceCode::UNSUBSCRIBE_DISTRIBUTED_HARDWARE:
56 return UnsubscribeDistributedHardwareInner(data, reply, option);
57 case IDScreenSinkInterfaceCode::DSCREEN_NOTIFY:
58 return DScreenNotifyInner(data, reply, option);
59 default:
60 DHLOGE("invalid request code.");
61 return IPCObjectStub::OnRemoteRequest(code, data, reply, option);
62 }
63 }
64
InitSinkInner(MessageParcel & data,MessageParcel & reply,MessageOption & option)65 int32_t DScreenSinkStub::InitSinkInner(MessageParcel &data, MessageParcel &reply,
66 MessageOption &option)
67 {
68 (void)option;
69 if (!HasEnableDHPermission()) {
70 DHLOGE("The caller has no ENABLE_DISTRIBUTED_HARDWARE permission.");
71 return ERR_DH_SCREEN_SA_CHECK_ENABLE_PERMISSION_FAIL;
72 }
73 std::string param = data.ReadString();
74 if (param.empty() || param.size() > PARAM_MAX_SIZE) {
75 DHLOGE("InitSinkInner error: invalid parameter.");
76 return ERR_DH_SCREEN_INPUT_PARAM_INVALID;
77 }
78 int32_t ret = InitSink(param);
79 reply.WriteInt32(ret);
80 return DH_SUCCESS;
81 }
82
ReleaseSinkInner(MessageParcel & data,MessageParcel & reply,MessageOption & option)83 int32_t DScreenSinkStub::ReleaseSinkInner(MessageParcel &data, MessageParcel &reply,
84 MessageOption &option)
85 {
86 (void)data;
87 (void)option;
88 if (!HasEnableDHPermission()) {
89 DHLOGE("The caller has no ENABLE_DISTRIBUTED_HARDWARE permission.");
90 return DSCREEN_INIT_ERR;
91 }
92 int32_t ret = ReleaseSink();
93 reply.WriteInt32(ret);
94 return DH_SUCCESS;
95 }
96
SubscribeDistributedHardwareInner(MessageParcel & data,MessageParcel & reply,MessageOption & option)97 int32_t DScreenSinkStub::SubscribeDistributedHardwareInner(MessageParcel &data, MessageParcel &reply,
98 MessageOption &option)
99 {
100 (void)option;
101 std::string dhId = data.ReadString();
102 std::string param = data.ReadString();
103 if (dhId.empty() || dhId.size() > DID_MAX_SIZE || param.empty() || param.size() > PARAM_MAX_SIZE) {
104 DHLOGE("SubscribeDistributedHardwareInner error: invalid parameter.");
105 return ERR_DH_SCREEN_INPUT_PARAM_INVALID;
106 }
107 int32_t ret = SubscribeLocalHardware(dhId, param);
108 reply.WriteInt32(ret);
109 return DH_SUCCESS;
110 }
111
UnsubscribeDistributedHardwareInner(MessageParcel & data,MessageParcel & reply,MessageOption & option)112 int32_t DScreenSinkStub::UnsubscribeDistributedHardwareInner(MessageParcel &data, MessageParcel &reply,
113 MessageOption &option)
114 {
115 (void)option;
116 std::string dhId = data.ReadString();
117 if (dhId.empty() || dhId.size() > DID_MAX_SIZE) {
118 DHLOGE("UnsubscribeDistributedHardwareInner error: invalid parameter.");
119 return ERR_DH_SCREEN_INPUT_PARAM_INVALID;
120 }
121 int32_t ret = UnsubscribeLocalHardware(dhId);
122 reply.WriteInt32(ret);
123 return DH_SUCCESS;
124 }
125
DScreenNotifyInner(MessageParcel & data,MessageParcel & reply,MessageOption & option)126 int32_t DScreenSinkStub::DScreenNotifyInner(MessageParcel &data, MessageParcel &reply,
127 MessageOption &option)
128 {
129 (void)reply;
130 (void)option;
131 std::string devId = data.ReadString();
132 int32_t eventCode = data.ReadInt32();
133 std::string eventContent = data.ReadString();
134 if (devId.empty() || devId.size() > DID_MAX_SIZE || eventContent.empty() ||
135 eventContent.size() > PARAM_MAX_SIZE) {
136 DHLOGE("DScreenNotifyInner error: invalid parameter.");
137 return ERR_DH_SCREEN_INPUT_PARAM_INVALID;
138 }
139 DScreenNotify(devId, eventCode, eventContent);
140 return DH_SUCCESS;
141 }
142 } // namespace DistributedHardware
143 } // namespace OHOS