ui,tunnel: auto-detect IPv6/IPv4 preference

Detect IP address change.
Request non-VPN network.
Update endpoint when needed.
Unregister network on wgTurnOff and use IPv4 if network is not known.

2 files changed, 26 insertions, 0 deletions

diff --git a/tunnel/tools/libwg-go/api-android.go b/tunnel/tools/libwg-go/api-android.go
index d47c5d76..d4e36480 100644
--- a/tunnel/tools/libwg-go/api-android.go
+++ b/tunnel/tools/libwg-go/api-android.go
@@ -224,4 +224,17 @@ func wgVersion() *C.char {
 	return C.CString("unknown")
 }
 
+//export wgSetConfig
+func wgSetConfig(tunnelHandle int32, settings string) int32 {
+	handle, ok := tunnelHandles[tunnelHandle]
+	if !ok {
+		return -1
+	}
+	err := handle.device.IpcSet(settings)
+	if err != nil {
+		return -1
+	}
+	return 0
+}
+
 func main() {}
diff --git a/tunnel/tools/libwg-go/jni.c b/tunnel/tools/libwg-go/jni.c
index 7ad94d35..e47b0be5 100644
--- a/tunnel/tools/libwg-go/jni.c
+++ b/tunnel/tools/libwg-go/jni.c
@@ -14,6 +14,7 @@ extern int wgGetSocketV4(int handle);
 extern int wgGetSocketV6(int handle);
 extern char *wgGetConfig(int handle);
 extern char *wgVersion();
+extern int wgSetConfig(int handle, struct go_string settings);
 
 JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNIEnv *env, jclass c, jstring ifname, jint tun_fd, jstring settings)
 {
@@ -69,3 +70,15 @@ JNIEXPORT jstring JNICALL Java_com_wireguard_android_backend_GoBackend_wgVersion
 	free(version);
 	return ret;
 }
+
+JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgSetConfig(JNIEnv *env, jclass c, jint handle, jstring settings)
+{
+	const char *settings_str = (*env)->GetStringUTFChars(env, settings, 0);
+	size_t settings_len = (*env)->GetStringUTFLength(env, settings);
+	int ret = wgSetConfig(handle, (struct go_string){
+		.str = settings_str,
+		.n = settings_len
+	});
+	(*env)->ReleaseStringUTFChars(env, settings, settings_str);
+	return ret;
+}