57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at http://mozilla.org/MPL/2.0/.
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package osutil
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import (
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"bytes"
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"net"
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)
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// ResolveInterfaceAddresses returns available addresses of the given network
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// type for a given interface.
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func ResolveInterfaceAddresses(network, nameOrMac string) []string {
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intf, err := net.InterfaceByName(nameOrMac)
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if err == nil {
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return interfaceAddresses(network, intf)
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}
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mac, err := net.ParseMAC(nameOrMac)
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if err != nil {
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return []string{nameOrMac}
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}
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intfs, err := net.Interfaces()
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if err != nil {
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return []string{nameOrMac}
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}
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for _, intf := range intfs {
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if bytes.Equal(intf.HardwareAddr, mac) {
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return interfaceAddresses(network, &intf)
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}
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}
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return []string{nameOrMac}
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}
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func interfaceAddresses(network string, intf *net.Interface) []string {
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var out []string
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addrs, err := intf.Addrs()
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if err != nil {
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return out
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}
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for _, addr := range addrs {
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ipnet, ok := addr.(*net.IPNet)
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if ok && (network == "tcp" || (network == "tcp4" && len(ipnet.IP) == net.IPv4len) || (network == "tcp6" && len(ipnet.IP) == net.IPv6len)) {
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out = append(out, ipnet.IP.String())
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}
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}
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return out
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}
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