mirror of
https://github.com/syncthing/syncthing.git
synced 2026-03-25 09:43:06 -04:00
06dd8ee6d7
### Purpose As discussed on the forum: https://forum.syncthing.net/t/reviving-nat-pmp-in-v2-x-on-android-14/24554 TL;DR Android 14+ only lets java code get the gateway IPv4 address which is used in SyncthingNative’s NAT-PMP feature. So I’ve added the java code to the wrapper, got the router IP address and feeded it to SyncthingNative by setting the env var “FALLBACK_NET_GATEWAY_IPV4”. This revives the NAT feature: > [Z36WU] INFO: Detected 1 NAT service ### Testing Local build and test via Android emulator (AVD 15).
45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
// Copyright (C) 2023 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 netutil
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"net/url"
|
|
"os"
|
|
|
|
"github.com/jackpal/gateway"
|
|
)
|
|
|
|
// Address constructs a URL from the given network and hostname.
|
|
func AddressURL(network, host string) string {
|
|
u := url.URL{
|
|
Scheme: network,
|
|
Host: host,
|
|
}
|
|
return u.String()
|
|
}
|
|
|
|
// Gateway returns the IP address of the default network gateway.
|
|
func Gateway() (ip net.IP, err error) {
|
|
ip, err = gateway.DiscoverGateway()
|
|
if err != nil {
|
|
// Fails on Android 14+ due to permission denied error when reading
|
|
// /proc/net/route. The wrapper may give a hint then because it is
|
|
// able to discover the gateway from java code.
|
|
if v := os.Getenv("FALLBACK_NET_GATEWAY_IPV4"); v != "" {
|
|
ip = net.ParseIP(v)
|
|
if ip == nil {
|
|
return nil, fmt.Errorf("%q: invalid IP", v)
|
|
}
|
|
return ip, nil
|
|
}
|
|
return ip, err
|
|
}
|
|
return ip, nil
|
|
}
|