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- // Copyright (C) 2015 The Syncthing Authors.
- //
- // This Source Code Form is subject to the terms of the Mozilla Public
- // License, v. 2.0. If a copy of the MPL was not distributed with this file,
- // You can obtain one at https://mozilla.org/MPL/2.0/.
- package osutil
- import (
- "net"
- )
- func GetLans() ([]*net.IPNet, error) {
- ifs, err := net.Interfaces()
- if err != nil {
- return nil, err
- }
- var addrs []net.Addr
- for _, currentIf := range ifs {
- if currentIf.Flags&net.FlagRunning == 0 {
- continue
- }
- currentAddrs, err := currentIf.Addrs()
- if err != nil {
- return nil, err
- }
- addrs = append(addrs, currentAddrs...)
- }
- nets := make([]*net.IPNet, 0, len(addrs))
- for _, addr := range addrs {
- net, ok := addr.(*net.IPNet)
- if ok {
- nets = append(nets, net)
- }
- }
- return nets, nil
- }
- func IPFromAddr(addr net.Addr) (net.IP, error) {
- switch a := addr.(type) {
- case *net.TCPAddr:
- return a.IP, nil
- case *net.UDPAddr:
- return a.IP, nil
- default:
- host, _, err := net.SplitHostPort(addr.String())
- return net.ParseIP(host), err
- }
- }
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