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Check if interface provides internet

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M66B
2025-03-09 14:23:09 +01:00
parent 4bb9e787e4
commit 4ec2cde387
1 changed files with 26 additions and 1 deletions
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27
app/src/main/java/eu/faircode/email/ConnectionHelper.java
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@@ -714,10 +714,34 @@ public class ConnectionHelper {
}
*/
try {
ConnectivityManager cm = Helper.getSystemService(context, ConnectivityManager.class);
Network[] networks = (cm == null ? null : cm.getAllNetworks());
Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces != null && interfaces.hasMoreElements()) {
NetworkInterface ni = interfaces.nextElement();
if (ni != null && ni.isUp())
if (ni != null && ni.isUp()) {
if (networks != null) {
boolean someInternet = false;
try {
for (Network network : networks) {
LinkProperties props = cm.getLinkProperties(network);
if (props != null && Objects.equals(ni.getName(), props.getInterfaceName())) {
NetworkCapabilities caps = cm.getNetworkCapabilities(network);
if (caps != null && caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET))
someInternet = true;
else
EntityLog.log(context, EntityLog.Type.Network, "Interface=" + ni + " provides no internet");
}
}
} catch (Throwable ex) {
Log.e(ex);
someInternet = true;
}
if (!someInternet)
continue;
}
for (InterfaceAddress iaddr : ni.getInterfaceAddresses()) {
InetAddress addr = iaddr.getAddress();
boolean local = (addr.isLoopbackAddress() || addr.isLinkLocalAddress());
@@ -729,6 +753,7 @@ public class ConnectionHelper {
else if (addr instanceof Inet6Address)
has6 = true;
}
}
}
} catch (Throwable ex) {
Log.e(ex);