nilsandClaude Opus 5.5
e52d7f01fc
Each check writes down the networks Android sees, the server's name lookup, how a failure happened and how many reports wait, and on a failure whether the internet answers at all, to tell a SIM without data from a server that is down. The report goes to a USB stick and, once online, the server. No address or token is written. Tried on the emulator. Not tried on the car. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6
93 lines
4.0 KiB
Java
93 lines
4.0 KiB
Java
package com.evsuite.abrp;
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import android.content.Context;
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import android.net.ConnectivityManager;
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import android.net.Network;
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import android.net.NetworkCapabilities;
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import android.net.NetworkInfo;
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import java.io.IOException;
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import java.net.HttpURLConnection;
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import java.net.InetAddress;
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import java.net.URL;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* What an update check writes down about the connection before and after it fails: the networks
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* Android sees, whether the server's name can be looked up, and whether the internet answers at
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* all, which tells a SIM without data from a server that is down. Blocking: background thread.
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* Never logs the server's address or anything about the car. — UNSTABLE BUILDS ONLY.
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*/
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final class UpdateNetworkCheck {
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/** Android's own connectivity test, as Android itself uses it; no data about the car is sent. */
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private static final String INTERNET_TEST = "https://www.gstatic.com/generate_204";
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private static final int TIMEOUT_MS = 10_000;
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private UpdateNetworkCheck() {}
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/** One line per network, or one saying there is none. */
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static List<String> networks(Context app) {
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List<String> out = new ArrayList<>();
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try {
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ConnectivityManager cm = (ConnectivityManager) app.getSystemService(Context.CONNECTIVITY_SERVICE);
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if (cm == null) {
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out.add("Network: no connectivity service");
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return out;
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}
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Network active = cm.getActiveNetwork();
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if (active == null) out.add("Network: none in use");
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for (Network network : cm.getAllNetworks()) {
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NetworkCapabilities caps = cm.getNetworkCapabilities(network);
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if (caps == null) continue;
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NetworkInfo info = cm.getNetworkInfo(network);
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out.add("Network: " + UpdateDiagnosis.network(transports(caps),
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caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET),
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caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED),
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network.equals(active), info != null && info.isRoaming()));
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}
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} catch (RuntimeException e) {
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out.add("Network: unreadable (" + e.getClass().getSimpleName() + ")");
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}
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return out;
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}
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private static List<String> transports(NetworkCapabilities caps) {
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List<String> out = new ArrayList<>();
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if (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) out.add("cellular");
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if (caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) out.add("Wi-Fi");
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if (caps.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET)) out.add("ethernet");
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if (caps.hasTransport(NetworkCapabilities.TRANSPORT_BLUETOOTH)) out.add("Bluetooth");
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if (caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) out.add("VPN");
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return out;
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}
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/** Whether the host's name resolves, without saying the name. */
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static String lookup(String host) {
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long started = System.currentTimeMillis();
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try {
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InetAddress.getByName(host);
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return "Server's name: found in " + (System.currentTimeMillis() - started) + " ms";
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} catch (IOException | RuntimeException e) {
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return "Server's name: " + UpdateDiagnosis.failure(e);
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}
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}
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/** Whether the world outside the car server answers. */
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static String internet() {
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HttpURLConnection conn = null;
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try {
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conn = (HttpURLConnection) new URL(INTERNET_TEST).openConnection();
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conn.setInstanceFollowRedirects(false);
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conn.setConnectTimeout(TIMEOUT_MS);
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conn.setReadTimeout(TIMEOUT_MS);
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return "Internet test: " + UpdateDiagnosis.internet(conn.getResponseCode());
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} catch (IOException | RuntimeException e) {
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return "Internet test: " + UpdateDiagnosis.failure(e);
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} finally {
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if (conn != null) conn.disconnect();
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}
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}
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}
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