1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
// Copyright (c) 2017 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package utils
import (
"encoding/binary"
"errors"
"net"
"strconv"
"strings"
"time"
)
var (
// ErrEmptyIP an error for empty ip strings
ErrEmptyIP = errors.New("empty string given for ip")
// ErrNotHostColonPort an error for invalid host port string
ErrNotHostColonPort = errors.New("expecting host:port")
// ErrNotFourOctets an error for the wrong number of octets after splitting a string
ErrNotFourOctets = errors.New("Wrong number of octets")
)
// ParseIPToUint32 converts a string ip (e.g. "x.y.z.w") to an uint32
func ParseIPToUint32(ip string) (uint32, error) {
if ip == "" {
return 0, ErrEmptyIP
}
if ip == "localhost" {
return 127<<24 | 1, nil
}
octets := strings.Split(ip, ".")
if len(octets) != 4 {
return 0, ErrNotFourOctets
}
var intIP uint32
for i := 0; i < 4; i++ {
octet, err := strconv.Atoi(octets[i])
if err != nil {
return 0, err
}
intIP = (intIP << 8) | uint32(octet)
}
return intIP, nil
}
// ParsePort converts port number from string to uin16
func ParsePort(portString string) (uint16, error) {
port, err := strconv.ParseUint(portString, 10, 16)
return uint16(port), err
}
// PackIPAsUint32 packs an IPv4 as uint32
func PackIPAsUint32(ip net.IP) uint32 {
if ipv4 := ip.To4(); ipv4 != nil {
return binary.BigEndian.Uint32(ipv4)
}
return 0
}
// TimeToMicrosecondsSinceEpochInt64 converts Go time.Time to a long
// representing time since epoch in microseconds, which is used expected
// in the Jaeger spans encoded as Thrift.
func TimeToMicrosecondsSinceEpochInt64(t time.Time) int64 {
// ^^^ Passing time.Time by value is faster than passing a pointer!
// BenchmarkTimeByValue-8 2000000000 1.37 ns/op
// BenchmarkTimeByPtr-8 2000000000 1.98 ns/op
return t.UnixNano() / 1000
}
|
