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| 1 | +// Package main determine your Internet-facing |
| 2 | +// IP address and location from multiple sources. |
| 3 | +// © Ben Garrett https://github.com/bengarrett/myip |
| 4 | +package main |
| 5 | + |
| 6 | +import ( |
| 7 | + "flag" |
| 8 | + "fmt" |
| 9 | + "os" |
| 10 | + "text/tabwriter" |
| 11 | + |
| 12 | + "github.com/bengarrett/myip/pkg/ipv4" |
| 13 | + "github.com/bengarrett/myip/pkg/ipv6" |
| 14 | + "github.com/bengarrett/myip/pkg/ping" |
| 15 | +) |
| 16 | + |
| 17 | +type modes struct { |
| 18 | + first bool |
| 19 | + ipv6 bool |
| 20 | + raw bool |
| 21 | + timeout int64 |
| 22 | +} |
| 23 | + |
| 24 | +const ( |
| 25 | + // Default HTTP request timeout value in milliseconds. |
| 26 | + httpTimeout = 5000 |
| 27 | + // Tabwriter padding using spaces. |
| 28 | + padding = 4 |
| 29 | +) |
| 30 | + |
| 31 | +var ( |
| 32 | + version = "0.0.0" |
| 33 | + commit = "unset" // nolint: gochecknoglobals |
| 34 | + date = "unset" // nolint: gochecknoglobals |
| 35 | +) |
| 36 | + |
| 37 | +func main() { |
| 38 | + msInSec := func(i int) int { |
| 39 | + const second = 1000 |
| 40 | + return i / second |
| 41 | + } |
| 42 | + var mode modes |
| 43 | + flag.BoolVar(&mode.first, "first", false, "returns the first reported IP address and its location") |
| 44 | + flag.BoolVar(&mode.ipv6, "ipv6", false, "return an IPv6 address instead of IPv4") |
| 45 | + flag.BoolVar(&mode.raw, "simple", false, "simple mode only displays the IP address") |
| 46 | + flag.Int64Var(&mode.timeout, "timeout", httpTimeout, |
| 47 | + fmt.Sprintf("https request timeout in milliseconds (default: %d [%d seconds])", httpTimeout, msInSec(httpTimeout))) |
| 48 | + ver := flag.Bool("version", false, "version and information for this program") |
| 49 | + f := flag.Bool("f", false, "alias for first") |
| 50 | + i := flag.Bool("i", false, "alias for ipv6") |
| 51 | + s := flag.Bool("s", false, "alias for simple") |
| 52 | + t := flag.Int64("t", 0, "alias for timeout") |
| 53 | + v := flag.Bool("v", false, "alias for version") |
| 54 | + |
| 55 | + flag.Usage = func() { |
| 56 | + const alias = 1 |
| 57 | + fmt.Fprintln(os.Stderr, "MyIP Usage:") |
| 58 | + fmt.Fprintln(os.Stderr, " myip [options]:") |
| 59 | + fmt.Fprintln(os.Stderr, "") |
| 60 | + w := tabwriter.NewWriter(os.Stderr, 0, 0, padding, ' ', 0) |
| 61 | + fmt.Fprintln(w, " -h, --help\tshow this list of options") |
| 62 | + flag.VisitAll(func(f *flag.Flag) { |
| 63 | + if len(f.Name) == alias { |
| 64 | + return |
| 65 | + } |
| 66 | + fmt.Fprintf(w, " -%v, --%v\t%v\n", f.Name[:1], f.Name, f.Usage) |
| 67 | + }) |
| 68 | + w.Flush() |
| 69 | + } |
| 70 | + flag.Parse() |
| 71 | + |
| 72 | + // version information |
| 73 | + if *ver || *v { |
| 74 | + info() |
| 75 | + return |
| 76 | + } |
| 77 | + // aliases |
| 78 | + if *i { |
| 79 | + mode.ipv6 = true |
| 80 | + } |
| 81 | + if *s { |
| 82 | + mode.raw = true |
| 83 | + } |
| 84 | + if *t > 0 { |
| 85 | + mode.timeout = *t |
| 86 | + } |
| 87 | + if *f { |
| 88 | + mode.first = true |
| 89 | + } |
| 90 | + switch mode.ipv6 { |
| 91 | + case true: |
| 92 | + mode.parseIPv6() |
| 93 | + case false: |
| 94 | + mode.parseIPv4() |
| 95 | + } |
| 96 | +} |
| 97 | + |
| 98 | +func (m modes) parseIPv4() { |
| 99 | + switch { |
| 100 | + case m.first && m.raw: |
| 101 | + ip := ipv4.One(m.timeout) |
| 102 | + fmt.Println(ip) |
| 103 | + return |
| 104 | + case m.first: |
| 105 | + fmt.Print(ping.Zero1) |
| 106 | + ip := ipv4.One(m.timeout) |
| 107 | + s := ping.Sprint(ip) |
| 108 | + fmt.Println(s) |
| 109 | + return |
| 110 | + case m.raw: |
| 111 | + ipv4.All(m.timeout, true) |
| 112 | + fmt.Println() |
| 113 | + return |
| 114 | + default: |
| 115 | + fmt.Print(ping.Zero) |
| 116 | + ipv4.All(m.timeout, false) |
| 117 | + fmt.Println() |
| 118 | + } |
| 119 | +} |
| 120 | + |
| 121 | +func (m modes) parseIPv6() { |
| 122 | + switch { |
| 123 | + case m.first && m.raw: |
| 124 | + ip := ipv6.One(m.timeout) |
| 125 | + fmt.Println(ip) |
| 126 | + return |
| 127 | + case m.first: |
| 128 | + fmt.Print(ping.Zero1) |
| 129 | + ip := ipv6.One(m.timeout) |
| 130 | + s := ping.Sprint(ip) |
| 131 | + fmt.Println(s) |
| 132 | + return |
| 133 | + case m.raw: |
| 134 | + ipv6.All(m.timeout, true) |
| 135 | + fmt.Println() |
| 136 | + return |
| 137 | + default: |
| 138 | + fmt.Print(ping.Zero) |
| 139 | + ipv6.All(m.timeout, false) |
| 140 | + fmt.Println() |
| 141 | + } |
| 142 | +} |
| 143 | + |
| 144 | +func self() (string, error) { |
| 145 | + exe, err := os.Executable() |
| 146 | + if err != nil { |
| 147 | + return "", fmt.Errorf("self error: %w", err) |
| 148 | + } |
| 149 | + return exe, nil |
| 150 | +} |
| 151 | + |
| 152 | +// Info prints out the program information and version. |
| 153 | +func info() { |
| 154 | + const copyright = "\u00A9" |
| 155 | + fmt.Printf("MyIP Tetrad v%s\n%s 2021-22 Ben Garrett\n", version, copyright) |
| 156 | + fmt.Printf("https://github.com/bengarrett/myip\n\n") |
| 157 | + fmt.Printf("build: %s (%s)\n", commit, date) |
| 158 | + exe, err := self() |
| 159 | + if err != nil { |
| 160 | + fmt.Printf("path: %s\n", err) |
| 161 | + return |
| 162 | + } |
| 163 | + fmt.Printf("path: %s\n", exe) |
| 164 | +} |
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