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Scott Baker2c1c4822019-10-16 11:02:41 -07001/*
2 * Copyright 2018-present Open Networking Foundation
3
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7
8 * http://www.apache.org/licenses/LICENSE-2.0
9
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16package common
17
18import (
Neha Sharma94f16a92020-06-26 04:17:55 +000019 "context"
Scott Baker2c1c4822019-10-16 11:02:41 -070020 "fmt"
Girish Gowdra89c985b2020-10-14 15:02:09 -070021 "github.com/opencord/voltha-lib-go/v4/pkg/log"
22 ic "github.com/opencord/voltha-protos/v4/go/inter_container"
Matteo Scandolo1530d412020-01-30 14:57:46 -080023 "google.golang.org/grpc/codes"
Scott Baker2c1c4822019-10-16 11:02:41 -070024 "math/rand"
25 "time"
26)
27
28//GetRandomSerialNumber returns a serial number formatted as "HOST:PORT"
29func GetRandomSerialNumber() string {
30 rand.Seed(time.Now().UnixNano())
31 return fmt.Sprintf("%d.%d.%d.%d:%d",
32 rand.Intn(255),
33 rand.Intn(255),
34 rand.Intn(255),
35 rand.Intn(255),
36 rand.Intn(9000)+1000,
37 )
38}
39
40//GetRandomMacAddress returns a random mac address
41func GetRandomMacAddress() string {
42 rand.Seed(time.Now().UnixNano())
43 return fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
44 rand.Intn(128),
45 rand.Intn(128),
46 rand.Intn(128),
47 rand.Intn(128),
48 rand.Intn(128),
49 rand.Intn(128),
50 )
51}
52
53const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
54const (
55 letterIdxBits = 6 // 6 bits to represent a letter index
56 letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
57 letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
58)
59
60var src = rand.NewSource(time.Now().UnixNano())
61
62func GetRandomString(n int) string {
63 b := make([]byte, n)
64 // A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
65 for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
66 if remain == 0 {
67 cache, remain = src.Int63(), letterIdxMax
68 }
69 if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
70 b[i] = letterBytes[idx]
71 i--
72 }
73 cache >>= letterIdxBits
74 remain--
75 }
76 return string(b)
77}
Matteo Scandolo1530d412020-01-30 14:57:46 -080078
Neha Sharma94f16a92020-06-26 04:17:55 +000079func ICProxyErrorCodeToGrpcErrorCode(ctx context.Context, icErr ic.ErrorCodeCodes) codes.Code {
Matteo Scandolo1530d412020-01-30 14:57:46 -080080 switch icErr {
81 case ic.ErrorCode_INVALID_PARAMETERS:
82 return codes.InvalidArgument
83 case ic.ErrorCode_UNSUPPORTED_REQUEST:
84 return codes.Unavailable
85 case ic.ErrorCode_DEADLINE_EXCEEDED:
86 return codes.DeadlineExceeded
87 default:
Neha Sharma94f16a92020-06-26 04:17:55 +000088 logger.Warnw(ctx, "cannnot-map-ic-error-code-to-grpc-error-code", log.Fields{"err": icErr})
Matteo Scandolo1530d412020-01-30 14:57:46 -080089 return codes.Internal
90 }
91}