Hesham/wireguard-android
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GoBackend: default MTU is 1280

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This sucks, but it works with mobile networks. Later we can do something
sophisticated like we do with wg-quick.c, but not now.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2018-04-17 05:59:23 +02:00
parent b5360871e8
commit 140fb395dc
3 changed files with 16 additions and 7 deletions
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13
app/src/main/java/com/wireguard/android/backend/GoBackend.java
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@ -72,7 +72,7 @@ public final class GoBackend implements Backend {
private static native void wgTurnOff(int handle);
private static native int wgTurnOn(String ifName, int tunFd, String settings);
private static native int wgTurnOn(String ifName, int tunFd, int mtu, String settings);
@Override
public Config applyConfig(final Tunnel tunnel, final Config config) throws Exception {
@ -244,12 +244,21 @@ public final class GoBackend implements Backend {
}
}
int mtu = -1;
try {
mtu = Integer.parseInt(config.getInterface().getMtu(), 10);
} catch (Exception e) {
}
if (mtu < 0)
mtu = 1280;
builder.setMtu(mtu);
builder.setBlocking(true);
ParcelFileDescriptor tun = builder.establish();
if (tun == null)
throw new Exception("Unable to create tun device");
currentTunnelHandle = wgTurnOn(tunnel.getName(), tun.detachFd(), fmt.toString());
currentTunnelHandle = wgTurnOn(tunnel.getName(), tun.detachFd(), mtu, fmt.toString());
if (currentTunnelHandle < 0)
throw new Exception("Unable to turn tunnel on (wgTurnOn return " + currentTunnelHandle + ")");

4
app/tools/libwg-go/api-android.go
View File

@ -30,7 +30,7 @@ func init() {
}
//export wgTurnOn
func wgTurnOn(ifnameRef string, tun_fd int32, settings string) int32 {
func wgTurnOn(ifnameRef string, tun_fd int32, mtu int32, settings string) int32 {
interfaceName := string([]byte(ifnameRef))
logger := &Logger{
@ -48,7 +48,7 @@ func wgTurnOn(ifnameRef string, tun_fd int32, settings string) int32 {
nopi: true,
}
device := NewDevice(tun, logger)
device.tun.mtu = DefaultMTU //TODO: make dynamic
device.tun.mtu = mtu
bufferedSettings := bufio.NewReadWriter(bufio.NewReader(strings.NewReader(settings)), bufio.NewWriter(ioutil.Discard))
setError := ipcSetOperation(device, bufferedSettings)

6
app/tools/libwg-go/jni.c
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@ -1,12 +1,12 @@
#include <jni.h>
struct go_string { const char *str; long n; };
extern int wgTurnOn(struct go_string ifname, int tun_fd, struct go_string settings);
extern int wgTurnOn(struct go_string ifname, int tun_fd, int mtu, struct go_string settings);
extern void wgTurnOff(int handle);
extern int wgGetSocketV4(int handle);
extern int wgGetSocketV6(int handle);
JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNIEnv *env, jclass c, jstring ifname, jint tun_fd, jstring settings)
JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNIEnv *env, jclass c, jstring ifname, jint tun_fd, jint mtu, jstring settings)
{
const char *ifname_str = (*env)->GetStringUTFChars(env, ifname, 0);
size_t ifname_len = (*env)->GetStringUTFLength(env, ifname);
@ -15,7 +15,7 @@ JNIEXPORT jint JNICALL Java_com_wireguard_android_backend_GoBackend_wgTurnOn(JNI
int ret = wgTurnOn((struct go_string){
.str = ifname_str,
.n = ifname_len
}, tun_fd, (struct go_string){
}, tun_fd, mtu, (struct go_string){
.str = settings_str,
.n = settings_len
});