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1 /*
2  * Copyright (C) 2021 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 "ipc_callback_stub.h"
17 #include "common_defs.h"
18 #include "device_auth_defines.h"
19 #include "hc_log.h"
20 #include "ipc_adapt.h"
21 #include "ipc_iface.h"
22 #include "ipc_skeleton.h"
23 #include "securec.h"
24 
25 #ifdef __cplusplus
26 extern "C" {
27 #endif
28 
DoCallBack(int32_t callbackId,uintptr_t cbHook,IpcIo * data,IpcIo * reply)29 static void DoCallBack(int32_t callbackId, uintptr_t cbHook, IpcIo *data, IpcIo *reply)
30 {
31     int32_t ret;
32     int32_t i;
33     IpcDataInfo cbDataCache[MAX_REQUEST_PARAMS_NUM] = { { 0 } };
34 
35     if (cbHook == 0x0) {
36         LOGE("Invalid call back hook");
37         return;
38     }
39 
40     uint32_t len = 0;
41     ReadUint32(data, &len); /* skip flat object length information */
42     for (i = 0; i < MAX_REQUEST_PARAMS_NUM; i++) {
43         ret = DecodeIpcData((uintptr_t)(data), &(cbDataCache[i].type),
44             &(cbDataCache[i].val), &(cbDataCache[i].valSz));
45         if (ret != HC_SUCCESS) {
46             LOGE("decode failed, ret %d", ret);
47             return;
48         }
49     }
50     ProcCbHook(callbackId, cbHook, cbDataCache, MAX_REQUEST_PARAMS_NUM, (uintptr_t)(reply));
51     return;
52 }
53 
CbStubOnRemoteRequest(uint32_t code,IpcIo * data,IpcIo * reply,MessageOption option)54 int32_t CbStubOnRemoteRequest(uint32_t code, IpcIo *data, IpcIo *reply, MessageOption option)
55 {
56     int32_t callbackId;
57     uintptr_t cbHook = 0x0;
58 
59     LOGI("enter invoking callback...");
60     if (data == NULL) {
61         LOGE("invalid param");
62         return -1;
63     }
64 
65     LOGI("receive ipc transact code(%u)", code);
66     switch (code) {
67         case DEV_AUTH_CALLBACK_REQUEST:
68             ReadInt32(data, &callbackId);
69             cbHook = ReadPointer(data);
70             DoCallBack(callbackId, cbHook, data, reply);
71             break;
72         default:
73             LOGE("Invoke callback cmd code(%u) error", code);
74             break;
75     }
76     LOGI("Invoke callback done, result(%d)", HC_SUCCESS);
77     return HC_SUCCESS;
78 }
79 
80 #ifdef __cplusplus
81 }
82 #endif
83