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 "lnn_node_weight.h"
17
18 #include <string.h>
19
20 #include "bus_center_manager.h"
21 #include "lnn_device_info.h"
22 #include "lnn_log.h"
23 #include "softbus_adapter_crypto.h"
24 #include "softbus_error_code.h"
25
26 #define MAX_WEIGHT_VALUE 1000
27 #define BASE_WEIGHT_PHONE_VALUE 2000
28 #define BASE_WEIGHT_PAD_VALUE 3000
29 #define BASE_WEIGHT_TV_VALUE 8000
30 #define BASE_WEIGHT_AUDIO_VALUE 7000
31 #define BASE_WEIGHT_CAR_VALUE 5000
32 #define BASE_WEIGHT_PC_VALUE 4000
33
LnnGetLocalWeight(void)34 int32_t LnnGetLocalWeight(void)
35 {
36 static int32_t weight;
37 static bool isGenWeight = false;
38 uint8_t randVal = 0;
39
40 if (isGenWeight) {
41 return weight;
42 }
43 if (SoftBusGenerateRandomArray(&randVal, sizeof(randVal)) != SOFTBUS_OK) {
44 LNN_LOGE(LNN_BUILDER, "generate random weight fail");
45 return randVal;
46 }
47 weight = (int32_t)((randVal * MAX_WEIGHT_VALUE) / UINT8_MAX);
48 int32_t localDevTypeId = 0;
49 if (LnnGetLocalNumInfo(NUM_KEY_DEV_TYPE_ID, &localDevTypeId) != SOFTBUS_OK) {
50 localDevTypeId = 0;
51 }
52 switch (localDevTypeId) {
53 case TYPE_PHONE_ID:
54 weight += BASE_WEIGHT_PHONE_VALUE;
55 break;
56 case TYPE_PAD_ID:
57 weight += BASE_WEIGHT_PAD_VALUE;
58 break;
59 case TYPE_TV_ID:
60 weight += BASE_WEIGHT_TV_VALUE;
61 break;
62 case TYPE_AUDIO_ID:
63 weight += BASE_WEIGHT_AUDIO_VALUE;
64 break;
65 case TYPE_CAR_ID:
66 weight += BASE_WEIGHT_CAR_VALUE;
67 break;
68 case TYPE_PC_ID:
69 weight += BASE_WEIGHT_PC_VALUE;
70 break;
71 default:
72 break;
73 }
74 LNN_LOGD(LNN_BUILDER, "generate local weight=%{public}d", weight);
75 isGenWeight = true;
76 return weight;
77 }
78
LnnCompareNodeWeight(int32_t weight1,const char * masterUdid1,int32_t weight2,const char * masterUdid2)79 int32_t LnnCompareNodeWeight(int32_t weight1, const char *masterUdid1, int32_t weight2,
80 const char *masterUdid2)
81 {
82 if (weight1 != weight2) {
83 return weight1 - weight2;
84 }
85 if (masterUdid1 == NULL || masterUdid2 == NULL) {
86 LNN_LOGE(LNN_BUILDER, "nullptr");
87 return weight1 - weight2;
88 }
89 return strcmp(masterUdid1, masterUdid2);
90 }