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package network
import (
"fmt"
"net"
"strings"
"github.com/lxc/incus/v6/internal/iprange"
)
func Example_parseIPRange() {
_, allowedv4NetworkA, _ := net.ParseCIDR("192.168.1.0/24")
_, allowedv4NetworkB, _ := net.ParseCIDR("192.168.0.0/16")
_, allowedv6NetworkA, _ := net.ParseCIDR("fd22:c952:653e:3df6::/64")
_, allowedv6NetworkB, _ := net.ParseCIDR("fd22:c952:653e::/48")
ipRanges := []string{
// Ranges within allowedv4NetworkA.
"192.168.1.1-192.168.1.255",
"0.0.0.1-192.168.1.255",
"0.0.0.1-0.0.0.255",
// Ranges outsde of allowedv4NetworkA but within allowedv4NetworkB.
"192.168.0.1-192.168.0.255",
"192.168.0.0-192.168.0.0",
"0.0.2.0-0.0.2.255",
// Invalid IP ranges.
"0.0.0.0.1-192.168.1.255",
"192.0.0.1-192.0.0.255",
"0.0.0.1-1.0.0.255",
"0.0.2.1-0.0.0.255",
// Ranges within allowedv6NetworkA.
"fd22:c952:653e:3df6::1-fd22:c952:653e:3df6::FFFF",
"::1-::FFFF",
// Ranges outsde of allowedv6NetworkA but within allowedv6NetworkB.
"fd22:c952:653e:FFFF::1-fd22:c952:653e:FFFF::FFFF",
"::AAAA:FFFF:FFFF:FFFF:1-::AAAA:FFFF:FFFF:FFFF:FFFF",
}
fmt.Println("With allowed networks")
for _, ipRange := range ipRanges {
parsedRange, err := parseIPRange(ipRange, allowedv4NetworkA, allowedv4NetworkB, allowedv6NetworkA, allowedv6NetworkB)
if err != nil {
fmt.Printf("Err: %v\n", err)
continue
}
fmt.Printf("Start: %s, End: %s\n", parsedRange.Start.String(), parsedRange.End.String())
}
fmt.Println("Without allowed networks")
for _, ipRange := range ipRanges {
parsedRange, err := parseIPRange(ipRange)
if err != nil {
fmt.Printf("Err: %v\n", err)
continue
}
fmt.Printf("Start: %s, End: %s\n", parsedRange.Start.String(), parsedRange.End.String())
}
// Output: With allowed networks
// Start: 192.168.1.1, End: 192.168.1.255
// Start: 192.168.1.1, End: 192.168.1.255
// Start: 192.168.1.1, End: 192.168.1.255
// Start: 192.168.0.1, End: 192.168.0.255
// Start: 192.168.0.0, End: 192.168.0.0
// Start: 192.168.2.0, End: 192.168.2.255
// Err: Start IP "0.0.0.0.1" is invalid
// Err: IP range "192.0.0.1-192.0.0.255" does not fall within any of the allowed networks [192.168.1.0/24 192.168.0.0/16 fd22:c952:653e:3df6::/64 fd22:c952:653e::/48]
// Err: IP range "0.0.0.1-1.0.0.255" does not fall within any of the allowed networks [192.168.1.0/24 192.168.0.0/16 fd22:c952:653e:3df6::/64 fd22:c952:653e::/48]
// Err: Start IP "0.0.2.1" must be less than End IP "0.0.0.255"
// Start: fd22:c952:653e:3df6::1, End: fd22:c952:653e:3df6::ffff
// Start: fd22:c952:653e:3df6::1, End: fd22:c952:653e:3df6::ffff
// Start: fd22:c952:653e:ffff::1, End: fd22:c952:653e:ffff::ffff
// Start: fd22:c952:653e:aaaa:ffff:ffff:ffff:1, End: fd22:c952:653e:aaaa:ffff:ffff:ffff:ffff
// Without allowed networks
// Start: 192.168.1.1, End: 192.168.1.255
// Start: 0.0.0.1, End: 192.168.1.255
// Start: 0.0.0.1, End: 0.0.0.255
// Start: 192.168.0.1, End: 192.168.0.255
// Start: 192.168.0.0, End: 192.168.0.0
// Start: 0.0.2.0, End: 0.0.2.255
// Err: Start IP "0.0.0.0.1" is invalid
// Start: 192.0.0.1, End: 192.0.0.255
// Start: 0.0.0.1, End: 1.0.0.255
// Err: Start IP "0.0.2.1" must be less than End IP "0.0.0.255"
// Start: fd22:c952:653e:3df6::1, End: fd22:c952:653e:3df6::ffff
// Start: ::1, End: ::ffff
// Start: fd22:c952:653e:ffff::1, End: fd22:c952:653e:ffff::ffff
// Start: ::aaaa:ffff:ffff:ffff:1, End: ::aaaa:ffff:ffff:ffff:ffff
}
func Example_ipRangesOverlap() {
rangePairs := [][2]string{
{"10.1.1.1-10.1.1.2", "10.1.1.3-10.1.1.4"},
{"10.1.1.1-10.1.2.1", "10.1.1.254-10.1.1.255"},
{"10.1.1.1-10.1.1.6", "10.1.1.5-10.1.1.9"},
{"10.1.1.5-10.1.1.9", "10.1.1.1-10.1.1.6"},
{"::1-::2", "::3-::4"},
{"::1-::6", "::5-::9"},
{"::5-::9", "::1-::6"},
}
for _, pair := range rangePairs {
r0, _ := parseIPRange(pair[0])
r1, _ := parseIPRange(pair[1])
result := IPRangesOverlap(r0, r1)
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", r0, r1, result)
}
// also do a couple of tests with ranges that have no end
singleIPRange := &iprange.Range{
Start: net.ParseIP("10.1.1.4"),
}
otherRange, _ := parseIPRange("10.1.1.1-10.1.1.6")
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", singleIPRange, otherRange, IPRangesOverlap(singleIPRange, otherRange))
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", otherRange, singleIPRange, IPRangesOverlap(otherRange, singleIPRange))
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", singleIPRange, singleIPRange, IPRangesOverlap(singleIPRange, singleIPRange))
otherRange, _ = parseIPRange("10.1.1.8-10.1.1.9")
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", singleIPRange, otherRange, IPRangesOverlap(singleIPRange, otherRange))
fmt.Printf("Range1: %v, Range2: %v, overlapped: %t\n", otherRange, singleIPRange, IPRangesOverlap(otherRange, singleIPRange))
// Output:
// Range1: 10.1.1.1-10.1.1.2, Range2: 10.1.1.3-10.1.1.4, overlapped: false
// Range1: 10.1.1.1-10.1.2.1, Range2: 10.1.1.254-10.1.1.255, overlapped: true
// Range1: 10.1.1.1-10.1.1.6, Range2: 10.1.1.5-10.1.1.9, overlapped: true
// Range1: 10.1.1.5-10.1.1.9, Range2: 10.1.1.1-10.1.1.6, overlapped: true
// Range1: ::1-::2, Range2: ::3-::4, overlapped: false
// Range1: ::1-::6, Range2: ::5-::9, overlapped: true
// Range1: ::5-::9, Range2: ::1-::6, overlapped: true
// Range1: 10.1.1.4, Range2: 10.1.1.1-10.1.1.6, overlapped: true
// Range1: 10.1.1.1-10.1.1.6, Range2: 10.1.1.4, overlapped: true
// Range1: 10.1.1.4, Range2: 10.1.1.4, overlapped: true
// Range1: 10.1.1.4, Range2: 10.1.1.8-10.1.1.9, overlapped: false
// Range1: 10.1.1.8-10.1.1.9, Range2: 10.1.1.4, overlapped: false
}
func Example_complementRanges() {
_, ipnet, err := net.ParseCIDR("10.1.1.0/24")
if err != nil {
fmt.Printf("Err: %v\n", err)
return
}
ranges := [][]*iprange.Range{
{
{Start: net.ParseIP("10.1.1.1"), End: net.ParseIP("10.1.1.10")},
},
{
{Start: net.ParseIP("10.1.1.10"), End: net.ParseIP("10.1.1.100")},
{Start: net.ParseIP("10.1.1.200"), End: net.ParseIP("10.1.1.230")},
},
{
{Start: net.ParseIP("10.1.1.10"), End: net.ParseIP("10.1.1.20")},
{Start: net.ParseIP("10.1.1.15"), End: net.ParseIP("10.1.1.25")},
},
}
for idx, r := range ranges {
result, err := complementRanges(r, ipnet)
if err != nil {
fmt.Printf("Err: %v\n", err)
return
}
parts := make([]string, len(result))
for i, r := range result {
parts[i] = fmt.Sprintf("%s-%s", r.Start.String(), r.End.String())
}
fmt.Printf("Range%d: %s\n", idx+1, strings.Join(parts, ", "))
}
// Output:
// Range1: 10.1.1.11-10.1.1.254
// Range2: 10.1.1.1-10.1.1.9, 10.1.1.101-10.1.1.199, 10.1.1.231-10.1.1.254
// Range3: 10.1.1.1-10.1.1.9, 10.1.1.26-10.1.1.254
}
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