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118 lines
4.1 KiB
Go
118 lines
4.1 KiB
Go
// Copyright (C) 2016 The Syncthing Authors.
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//
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// Adapted from https://github.com/jackpal/Taipei-Torrent/blob/dd88a8bfac6431c01d959ce3c745e74b8a911793/IGD.go
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// Copyright (c) 2010 Jack Palevich (https://github.com/jackpal/Taipei-Torrent/blob/dd88a8bfac6431c01d959ce3c745e74b8a911793/LICENSE)
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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package upnp
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import (
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"net"
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"net/url"
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"strings"
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"time"
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"github.com/syncthing/syncthing/lib/nat"
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)
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// An IGD is a UPnP InternetGatewayDevice.
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type IGD struct {
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uuid string
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friendlyName string
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services []IGDService
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url *url.URL
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localIPAddress net.IP
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}
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func (n *IGD) ID() string {
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return n.uuid
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}
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func (n *IGD) FriendlyName() string {
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return n.friendlyName
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}
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// FriendlyIdentifier returns a friendly identifier (friendly name + IP
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// address) for the IGD.
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func (n *IGD) FriendlyIdentifier() string {
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return "'" + n.FriendlyName() + "' (" + strings.Split(n.URL().Host, ":")[0] + ")"
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}
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func (n *IGD) URL() *url.URL {
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return n.url
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}
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// AddPortMapping adds a port mapping to all relevant services on the
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// specified InternetGatewayDevice. Port mapping will fail and return an error
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// if action is fails for _any_ of the relevant services. For this reason, it
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// is generally better to configure port mapping for each individual service
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// instead.
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func (n *IGD) AddPortMapping(protocol nat.Protocol, internalPort, externalPort int, description string, duration time.Duration) (int, error) {
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for _, service := range n.services {
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err := service.AddPortMapping(n.localIPAddress, protocol, internalPort, externalPort, description, duration)
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if err != nil {
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return externalPort, err
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}
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}
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return externalPort, nil
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}
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// DeletePortMapping deletes a port mapping from all relevant services on the
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// specified InternetGatewayDevice. Port mapping will fail and return an error
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// if action is fails for _any_ of the relevant services. For this reason, it
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// is generally better to configure port mapping for each individual service
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// instead.
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func (n *IGD) DeletePortMapping(protocol nat.Protocol, externalPort int) error {
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for _, service := range n.services {
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err := service.DeletePortMapping(protocol, externalPort)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// GetExternalIPAddress returns the external IP address of the IGD, or an error
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// if no service providing this feature exists.
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func (n *IGD) GetExternalIPAddress() (ip net.IP, err error) {
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for _, service := range n.services {
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ip, err = service.GetExternalIPAddress()
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if err == nil {
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break
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}
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}
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return
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}
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// GetLocalIPAddress returns the IP address of the local network interface
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// which is facing the IGD.
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func (n *IGD) GetLocalIPAddress() net.IP {
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return n.localIPAddress
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}
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