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example_test.go
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// Copyright 2020 The Inet.Af AUTHORS. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package netaddr_test
import (
"fmt"
"os"
"text/tabwriter"
"inet.af/netaddr"
)
func ExampleIP() {
ip, err := netaddr.ParseIP("192.0.2.3")
if err != nil {
panic(err)
}
// netaddr.IP supports comparison using ==
fmt.Println(ip == netaddr.IPv4(192, 0, 2, 3))
// netaddr.IP can be used as a map key
hosts := map[netaddr.IP]string{ip: "example.net"}
fmt.Println(hosts)
// Output:
// true
// map[192.0.2.3:example.net]
}
func ExampleIP_properties() {
var zeroIP netaddr.IP
w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
fmt.Fprintln(w, "String()\tZone()\tIsZero()\tIs4()\tIs6()\tIs4in6()")
for _, ip := range []netaddr.IP{
zeroIP,
netaddr.MustParseIP("192.0.2.3"),
netaddr.MustParseIP("2001:db8::68"),
netaddr.MustParseIP("2001:db8::68%eth0"),
netaddr.MustParseIP("::ffff:192.0.2.3"),
} {
fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v\t%v\n", ip, ip.Zone(), ip.IsZero(), ip.Is4(), ip.Is6(), ip.Is4in6())
}
w.Flush()
// Output:
// String() Zone() IsZero() Is4() Is6() Is4in6()
// invalid IP true false false false
// 192.0.2.3 false true false false
// 2001:db8::68 false false true false
// 2001:db8::68%eth0 eth0 false false true false
// ::ffff:c000:203 false false true true
}
func ExampleIP_Is4() {
var zeroIP netaddr.IP
ipv4 := netaddr.MustParseIP("192.0.2.3")
ipv6 := netaddr.MustParseIP("2001:db8::68")
ip4in6 := netaddr.MustParseIP("::ffff:192.0.2.3")
fmt.Printf("IP{}.Is4() -> %v\n", zeroIP.Is4())
fmt.Printf("(%v).Is4() -> %v\n", ipv4, ipv4.Is4())
fmt.Printf("(%v).Is4() -> %v\n", ipv6, ipv6.Is4())
fmt.Printf("(%v).Is4() -> %v\n", ip4in6, ip4in6.Is4())
// Output:
// IP{}.Is4() -> false
// (192.0.2.3).Is4() -> true
// (2001:db8::68).Is4() -> false
// (::ffff:c000:203).Is4() -> false
}
func ExampleIP_Is4in6() {
var zeroIP netaddr.IP
ipv4 := netaddr.MustParseIP("192.0.2.3")
ipv6 := netaddr.MustParseIP("2001:db8::68")
ip4in6 := netaddr.MustParseIP("::ffff:192.0.2.3")
fmt.Printf("IP{}.Is4in6() -> %v\n", zeroIP.Is4in6())
fmt.Printf("(%v).Is4in6() -> %v\n", ipv4, ipv4.Is4in6())
fmt.Printf("(%v).Is4in6() -> %v\n", ipv6, ipv6.Is4in6())
fmt.Printf("(%v).Is4in6() -> %v\n", ip4in6, ip4in6.Is4in6())
// Output:
// IP{}.Is4in6() -> false
// (192.0.2.3).Is4in6() -> false
// (2001:db8::68).Is4in6() -> false
// (::ffff:c000:203).Is4in6() -> true
}
func ExampleIP_Is6() {
var zeroIP netaddr.IP
ipv4 := netaddr.MustParseIP("192.0.2.3")
ipv6 := netaddr.MustParseIP("2001:db8::68")
ip4in6 := netaddr.MustParseIP("::ffff:192.0.2.3")
fmt.Printf("IP{}.Is6() -> %v\n", zeroIP.Is4in6())
fmt.Printf("(%v).Is6() -> %v\n", ipv4, ipv4.Is6())
fmt.Printf("(%v).Is6() -> %v\n", ipv6, ipv6.Is6())
fmt.Printf("(%v).Is6() -> %v\n", ip4in6, ip4in6.Is6())
// Output:
// IP{}.Is6() -> false
// (192.0.2.3).Is6() -> false
// (2001:db8::68).Is6() -> true
// (::ffff:c000:203).Is6() -> true
}
func ExampleIP_IsZero() {
var zeroIP netaddr.IP
ipv4AllZeroes := netaddr.MustParseIP("0.0.0.0")
ipv6AllZeroes := netaddr.MustParseIP("::")
fmt.Printf("IP{}.IsZero() -> %v\n", zeroIP.IsZero())
fmt.Printf("(%v).IsZero() -> %v\n", ipv4AllZeroes, ipv4AllZeroes.IsZero())
fmt.Printf("(%v).IsZero() -> %v\n", ipv6AllZeroes, ipv6AllZeroes.IsZero())
// Output:
// IP{}.IsZero() -> true
// (0.0.0.0).IsZero() -> false
// (::).IsZero() -> false
}
func ExampleIP_String() {
ipv4 := netaddr.MustParseIP("192.0.2.3")
ipv6 := netaddr.MustParseIP("2001:db8::68")
ip4in6 := netaddr.MustParseIP("::ffff:192.0.2.3")
fmt.Printf("(%v).String() -> %v\n", ipv4, ipv4.String())
fmt.Printf("(%v).String() -> %v\n", ipv6, ipv6.String())
fmt.Printf("(%v).String() -> %v\n", ip4in6, ip4in6.String())
// Output:
// (192.0.2.3).String() -> 192.0.2.3
// (2001:db8::68).String() -> 2001:db8::68
// (::ffff:c000:203).String() -> ::ffff:c000:203
}
func ExampleIP_Unmap() {
ipv4 := netaddr.MustParseIP("192.0.2.3")
ipv6 := netaddr.MustParseIP("2001:db8::68")
ip4in6 := netaddr.MustParseIP("::ffff:192.0.2.3")
fmt.Printf("(%v).Unmap() -> %v\n", ipv4, ipv4.Unmap())
fmt.Printf("(%v).Unmap() -> %v\n", ipv6, ipv6.Unmap())
fmt.Printf("(%v).Unmap() -> %v\n", ip4in6, ip4in6.Unmap())
// Output:
// (192.0.2.3).Unmap() -> 192.0.2.3
// (2001:db8::68).Unmap() -> 2001:db8::68
// (::ffff:c000:203).Unmap() -> 192.0.2.3
}
func ExampleIP_WithZone() {
ipv4 := netaddr.MustParseIP("192.0.2.3")
ipv6 := netaddr.MustParseIP("2001:db8::68")
ipv6Zoned := netaddr.MustParseIP("2001:db8::68%eth0")
fmt.Printf("(%v).WithZone(\"newzone\") -> %v\n", ipv4, ipv4.WithZone("newzone"))
fmt.Printf("(%v).WithZone(\"newzone\") -> %v\n", ipv6, ipv6.WithZone("newzone"))
fmt.Printf("(%v).WithZone(\"newzone\") -> %v\n", ipv6Zoned, ipv6Zoned.WithZone("newzone"))
fmt.Printf("(%v).WithZone(\"\") -> %v\n", ipv6Zoned, ipv6Zoned.WithZone(""))
// Output:
// (192.0.2.3).WithZone("newzone") -> 192.0.2.3
// (2001:db8::68).WithZone("newzone") -> 2001:db8::68%newzone
// (2001:db8::68%eth0).WithZone("newzone") -> 2001:db8::68%newzone
// (2001:db8::68%eth0).WithZone("") -> 2001:db8::68
}
func ExampleIPSet() {
var b netaddr.IPSetBuilder
b.AddPrefix(netaddr.MustParseIPPrefix("10.0.0.0/8"))
b.RemovePrefix(netaddr.MustParseIPPrefix("10.0.0.0/16"))
b.AddRange(netaddr.IPRangeFrom(
netaddr.MustParseIP("fed0::0400"),
netaddr.MustParseIP("fed0::04ff"),
))
s, _ := b.IPSet()
fmt.Println("Ranges:")
for _, r := range s.Ranges() {
fmt.Printf(" %s - %s\n", r.From(), r.To())
}
fmt.Println("Prefixes:")
for _, p := range s.Prefixes() {
fmt.Printf(" %s\n", p)
}
// Output:
// Ranges:
// 10.1.0.0 - 10.255.255.255
// fed0::400 - fed0::4ff
// Prefixes:
// 10.1.0.0/16
// 10.2.0.0/15
// 10.4.0.0/14
// 10.8.0.0/13
// 10.16.0.0/12
// 10.32.0.0/11
// 10.64.0.0/10
// 10.128.0.0/9
// fed0::400/120
}