mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-05 16:05:36 +00:00
71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
// Package netaddr is a transitional package while we finish migrating from inet.af/netaddr
|
|
// to Go 1.18's net/netip.
|
|
//
|
|
// TODO(bradfitz): delete this package eventually. Tracking bug is
|
|
// https://github.com/tailscale/tailscale/issues/5162
|
|
package netaddr
|
|
|
|
import (
|
|
"net"
|
|
"net/netip"
|
|
)
|
|
|
|
// IPv4 returns the IP of the IPv4 address a.b.c.d.
|
|
func IPv4(a, b, c, d uint8) netip.Addr {
|
|
return netip.AddrFrom4([4]byte{a, b, c, d})
|
|
}
|
|
|
|
// Unmap returns the provided AddrPort with its Addr IP component Unmap'ed.
|
|
//
|
|
// See https://github.com/golang/go/issues/53607#issuecomment-1203466984
|
|
func Unmap(ap netip.AddrPort) netip.AddrPort {
|
|
return netip.AddrPortFrom(ap.Addr().Unmap(), ap.Port())
|
|
}
|
|
|
|
// FromStdIPNet returns an IPPrefix from the standard library's IPNet type.
|
|
// If std is invalid, ok is false.
|
|
func FromStdIPNet(std *net.IPNet) (prefix netip.Prefix, ok bool) {
|
|
ip, ok := netip.AddrFromSlice(std.IP)
|
|
if !ok {
|
|
return netip.Prefix{}, false
|
|
}
|
|
ip = ip.Unmap()
|
|
|
|
if l := len(std.Mask); l != net.IPv4len && l != net.IPv6len {
|
|
// Invalid mask.
|
|
return netip.Prefix{}, false
|
|
}
|
|
|
|
ones, bits := std.Mask.Size()
|
|
if ones == 0 && bits == 0 {
|
|
// IPPrefix does not support non-contiguous masks.
|
|
return netip.Prefix{}, false
|
|
}
|
|
|
|
return netip.PrefixFrom(ip, ones), true
|
|
}
|