/
upnp.go
126 lines (104 loc) · 2.61 KB
/
upnp.go
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package upnp
import (
"encoding/xml"
"errors"
"fmt"
"net/http"
"github.com/MoZhonghua/mytools/util"
)
type UPnpService struct {
ID string `xml:"serviceId"`
Type string `xml:"serviceType"`
ControlURL string `xml:"controlURL"`
}
type UPnpDevice struct {
DeviceType string `xml:"deviceType"`
FriendlyName string `xml:"friendlyName"`
UDN string `xml:"UDN"`
Devices []UPnpDevice `xml:"deviceList>device"`
Services []UPnpService `xml:"serviceList>service"`
}
type UPnPRoot struct {
Device UPnpDevice `xml:"device"`
}
func (d *UPnpDevice) GetChildDevices(deviceType string) []UPnpDevice {
var result []UPnpDevice
for _, dev := range d.Devices {
if dev.DeviceType == deviceType {
result = append(result, dev)
}
}
return result
}
func (d *UPnpDevice) GetChildServices(serviceType string) []UPnpService {
var result []UPnpService
for _, service := range d.Services {
if service.Type == serviceType {
result = append(result, service)
}
}
return result
}
func GetUPnPData(deviceDescriptionLocation string) (*UPnPRoot, error) {
req, err := http.NewRequest("GET", deviceDescriptionLocation, nil)
if err != nil {
return nil, err
}
response, err := util.DefaultHttpClient.Do(req)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode >= 400 {
return nil, errors.New("bad status code:" + response.Status)
}
var upnpRoot UPnPRoot
err = xml.NewDecoder(response.Body).Decode(&upnpRoot)
if err != nil {
return nil, err
}
return &upnpRoot, nil
}
func AddUpnpTcpPortMapping(igdServer string, externalPort int,
internalIp string, internalPort int) (string, error) {
igdURL := fmt.Sprintf("http://%s:1900/igd.xml", igdServer)
root, err := GetUPnPData(igdURL)
if err != nil {
return "", err
}
igd, err := GetIGDDevice(root, igdURL)
if err != nil {
return "", err
}
for _, s := range igd.Services {
externalIP, err := s.GetExternalIPAddress()
if err != nil {
return "", err
}
err = s.AddPortMapping("TCP", externalPort, internalIp, internalPort, 0, "")
if err != nil {
return "", err
}
return externalIP.String(), nil
}
return "", errors.New("can't create port mapping")
}
func DeleteUpnpTcpPortMapping(igdServer string, externalPort int) error {
igdURL := fmt.Sprintf("http://%s:1900/igd.xml", igdServer)
root, err := GetUPnPData(igdURL)
if err != nil {
return err
}
igd, err := GetIGDDevice(root, igdURL)
if err != nil {
return err
}
for _, s := range igd.Services {
err = s.DeletePortMapping("TCP", externalPort)
if err != nil {
return err
}
return nil
}
return nil
}