README
¶
package extnetip
Package extnetip is an extension to net/netip.
No additional types are defined, only required auxiliary functions for some
existing net/netip types are provided.
With these small extensions, third-party IP range libraries based on stdlib
net/netip are now possible without frequent conversion to/from bytes, see also https://github.com/gaissmai/iprange
API
import "github.com/gaissmai/extnetip"
func Range(p netip.Prefix) (first, last netip.Addr)
func Prefix(first, last netip.Addr) (prefix netip.Prefix, ok bool)
func Prefixes(first, last netip.Addr) []netip.Prefix
func PrefixesAppend(dst []netip.Prefix, first, last netip.Addr) []netip.Prefix
Future
Hopefully some day these tiny helper functions are added to netip by the stdlib maintainers, currently (2022)
they refused the proposal.
Documentation
¶
Overview ¶
Package extnetip is an extension to net/netip.
No additional types are defined, only required auxiliary functions for some existing net/netip types are provided.
With these small extensions, third-party IP range libraries based on stdlib net/netip are now possible without frequent conversion to/from bytes.
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Prefix ¶
Prefix returns the netip.Prefix from first to last and ok=true, if it can be presented exactly as such.
If first or last are not valid, in the wrong order or not exactly equal to one prefix, ok is false.
Example ¶
package main
import (
"fmt"
"net/netip"
"github.com/gaissmai/extnetip"
)
func main() {
first := netip.MustParseAddr("fe80::")
last := netip.MustParseAddr("fe80::7")
pfx, ok := extnetip.Prefix(first, last)
fmt.Println("OK: ", ok)
fmt.Println("Prefix:", pfx)
}
Output: OK: true Prefix: fe80::/125
func Prefixes ¶
Prefixes returns the set of netip.Prefix entries that covers the IP range from first to last.
If first or last are invalid, in the wrong order, or if they're of different address families, then Prefixes returns nil.
Prefixes necessarily allocates. See PrefixesAppend for a version that uses memory you provide.
Example ¶
package main
import (
"fmt"
"net/netip"
"github.com/gaissmai/extnetip"
)
func main() {
first := netip.MustParseAddr("10.1.0.0")
last := netip.MustParseAddr("10.1.13.233")
pfxs := extnetip.Prefixes(first, last)
fmt.Println("Prefixes:")
for _, pfx := range pfxs {
fmt.Println(pfx)
}
}
Output: Prefixes: 10.1.0.0/21 10.1.8.0/22 10.1.12.0/24 10.1.13.0/25 10.1.13.128/26 10.1.13.192/27 10.1.13.224/29 10.1.13.232/31
func PrefixesAppend ¶ added in v0.3.0
PrefixesAppend is an append version of Prefixes. It appends the netip.Prefix entries to dst that covers the IP range from first to last.
func Range ¶
Range returns the inclusive range of IP addresses that p covers.
If p is invalid, Range returns the zero values.
Example ¶
package main
import (
"fmt"
"net/netip"
"github.com/gaissmai/extnetip"
)
func main() {
pfx := netip.MustParsePrefix("fe80::/10")
first, last := extnetip.Range(pfx)
fmt.Println("First:", first)
fmt.Println("Last: ", last)
}
Output: First: fe80:: Last: febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff
Types ¶
This section is empty.
Source Files