forked from mikioh/ipaddr
/
example_test.go
138 lines (131 loc) · 3.81 KB
/
example_test.go
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// Copyright 2015 Mikio Hara. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE.
package ipaddr_test
import (
"fmt"
"log"
"net"
"github.com/mikioh/ipaddr"
)
func ExampleCursor_traversal() {
c, err := ipaddr.Parse("2001:db8::/126,192.168.1.128/30,192.168.0.0/29")
if err != nil {
log.Fatal(err)
}
fmt.Println(c.Pos(), c.First(), c.Last(), c.List())
for pos := c.Next(); pos != nil; pos = c.Next() {
fmt.Println(pos)
}
fmt.Println(c.Pos(), c.First(), c.Last(), c.List())
for pos := c.Prev(); pos != nil; pos = c.Prev() {
fmt.Println(pos)
}
fmt.Println(c.Pos(), c.First(), c.Last(), c.List())
// Output:
// &{192.168.0.0 192.168.0.0/29} &{192.168.0.0 192.168.0.0/29} &{2001:db8::3 2001:db8::/126} [192.168.0.0/29 192.168.1.128/30 2001:db8::/126]
// &{192.168.0.1 192.168.0.0/29}
// &{192.168.0.2 192.168.0.0/29}
// &{192.168.0.3 192.168.0.0/29}
// &{192.168.0.4 192.168.0.0/29}
// &{192.168.0.5 192.168.0.0/29}
// &{192.168.0.6 192.168.0.0/29}
// &{192.168.0.7 192.168.0.0/29}
// &{192.168.1.128 192.168.1.128/30}
// &{192.168.1.129 192.168.1.128/30}
// &{192.168.1.130 192.168.1.128/30}
// &{192.168.1.131 192.168.1.128/30}
// &{2001:db8:: 2001:db8::/126}
// &{2001:db8::1 2001:db8::/126}
// &{2001:db8::2 2001:db8::/126}
// &{2001:db8::3 2001:db8::/126}
// &{2001:db8::3 2001:db8::/126} &{192.168.0.0 192.168.0.0/29} &{2001:db8::3 2001:db8::/126} [192.168.0.0/29 192.168.1.128/30 2001:db8::/126]
// &{2001:db8::2 2001:db8::/126}
// &{2001:db8::1 2001:db8::/126}
// &{2001:db8:: 2001:db8::/126}
// &{192.168.1.131 192.168.1.128/30}
// &{192.168.1.130 192.168.1.128/30}
// &{192.168.1.129 192.168.1.128/30}
// &{192.168.1.128 192.168.1.128/30}
// &{192.168.0.7 192.168.0.0/29}
// &{192.168.0.6 192.168.0.0/29}
// &{192.168.0.5 192.168.0.0/29}
// &{192.168.0.4 192.168.0.0/29}
// &{192.168.0.3 192.168.0.0/29}
// &{192.168.0.2 192.168.0.0/29}
// &{192.168.0.1 192.168.0.0/29}
// &{192.168.0.0 192.168.0.0/29}
// &{192.168.0.0 192.168.0.0/29} &{192.168.0.0 192.168.0.0/29} &{2001:db8::3 2001:db8::/126} [192.168.0.0/29 192.168.1.128/30 2001:db8::/126]
}
func ExamplePrefix_subnettingAndSupernetting() {
_, n, err := net.ParseCIDR("172.16.0.0/16")
if err != nil {
log.Fatal(err)
}
p := ipaddr.NewPrefix(n)
fmt.Println(p.IP, p.Last(), p.Len(), p.Mask, p.Hostmask())
ps := p.Subnets(3)
for _, p := range ps {
fmt.Println(p)
}
fmt.Println(ipaddr.Supernet(ps[4:6]))
// Output:
// 172.16.0.0 172.16.255.255 16 ffff0000 0000ffff
// 172.16.0.0/19
// 172.16.32.0/19
// 172.16.64.0/19
// 172.16.96.0/19
// 172.16.128.0/19
// 172.16.160.0/19
// 172.16.192.0/19
// 172.16.224.0/19
// 172.16.128.0/18
}
func ExamplePrefix_subnettingAndAggregation() {
_, n, err := net.ParseCIDR("192.168.0.0/24")
if err != nil {
log.Fatal(err)
}
p := ipaddr.NewPrefix(n)
fmt.Println(p.IP, p.Last(), p.Len(), p.Mask, p.Hostmask())
ps := p.Subnets(2)
for _, p := range ps {
fmt.Println(p)
}
_, n, err = net.ParseCIDR("192.168.100.0/24")
if err != nil {
log.Fatal(err)
}
ps = append(ps, *ipaddr.NewPrefix(n))
fmt.Println(ipaddr.Aggregate(ps[2:]))
// Output:
// 192.168.0.0 192.168.0.255 24 ffffff00 000000ff
// 192.168.0.0/26
// 192.168.0.64/26
// 192.168.0.128/26
// 192.168.0.192/26
// [192.168.0.128/25 192.168.100.0/24]
}
func ExamplePrefix_addressRangeSummarization() {
ps := ipaddr.Summarize(net.ParseIP("2001:db8::1"), net.ParseIP("2001:db8::8000"))
for _, p := range ps {
fmt.Println(p)
}
// Output:
// 2001:db8::1/128
// 2001:db8::2/127
// 2001:db8::4/126
// 2001:db8::8/125
// 2001:db8::10/124
// 2001:db8::20/123
// 2001:db8::40/122
// 2001:db8::80/121
// 2001:db8::100/120
// 2001:db8::200/119
// 2001:db8::400/118
// 2001:db8::800/117
// 2001:db8::1000/116
// 2001:db8::2000/115
// 2001:db8::4000/114
// 2001:db8::8000/128
}