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Disable and re-enable network if we can't reach our own HS.

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This commit is contained in:
akwizgran
2022-04-16 20:56:04 +01:00
parent 3038b92dbc
commit 213d2f1da4
1 changed files with 49 additions and 12 deletions
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61
bramble-core/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java
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@@ -126,10 +126,16 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
private static final Pattern ONION_V3 = Pattern.compile("[a-z2-7]{56}");
/**
* After this many successful connections to our own hidden service we
* consider the network to be stable.
* After this many consecutive successful connections to our own hidden
* service we consider the network to be stable.
*/
private static final int STABILITY_THRESHOLD = 3;
private static final int STABLE_NETWORK_THRESHOLD = 3;
/**
* After this many consecutive failed connections to our own hidden service
* we consider our connection to the Tor network to be broken.
*/
private static final int BROKEN_NETWORK_THRESHOLD = 3;
/**
* How often to poll our own hidden service when the network is considered
@@ -665,7 +671,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
DuplexTransportConnection d = createConnection(p);
if (d == null) {
LOG.info("Could not connect to own hidden service");
state.resetNetworkStability();
state.onStabilityCheckFailed();
// If the network was previously considered stable then
// we didn't poll our contacts above, so poll them now
if (stable) pollContacts(properties);
@@ -679,7 +685,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
} catch (IOException e) {
logException(LOG, WARNING, e);
}
state.incrementNetworkStability();
state.onStabilityCheckSucceeded();
}
});
}
@@ -945,6 +951,18 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
}
}
private void disableAndReenableNetwork() {
connectionStatusExecutor.execute(() -> {
try {
if (state.isTorRunning()) enableNetwork(false);
} catch (IOException ex) {
logException(LOG, WARNING, ex);
}
});
updateConnectionStatus(networkManager.getNetworkStatus(),
batteryManager.isCharging());
}
private void updateConnectionStatus(NetworkStatus status,
boolean charging) {
connectionStatusExecutor.execute(() -> {
@@ -1071,7 +1089,14 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
settingsChecked = false;
@GuardedBy("this")
private int reasonsDisabled = 0, networkStability = 0;
private int reasonsDisabled = 0;
/**
* The number of consecutive successful (positive) or failed (negative)
* connections to our own hidden service.
*/
@GuardedBy("this")
private int networkStability = 0;
@GuardedBy("this")
@Nullable
@@ -1180,19 +1205,32 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
}
private synchronized boolean isNetworkStable() {
return networkStability >= STABILITY_THRESHOLD;
return networkStability >= STABLE_NETWORK_THRESHOLD;
}
private synchronized void incrementNetworkStability() {
networkStability++;
private synchronized void onStabilityCheckSucceeded() {
if (networkStability <= 0) networkStability = 1;
else networkStability++;
logNetworkStability();
}
private synchronized void onStabilityCheckFailed() {
if (networkStability >= 0) networkStability = -1;
else networkStability--;
if (networkStability <= -BROKEN_NETWORK_THRESHOLD) {
LOG.warning("Connection to Tor appears to be broken");
resetNetworkStability();
disableAndReenableNetwork();
} else {
logNetworkStability();
}
}
private synchronized void resetNetworkStability() {
int old = networkStability;
networkStability = 0;
logNetworkStability();
if (old >= STABILITY_THRESHOLD) {
if (old >= STABLE_NETWORK_THRESHOLD) {
callback.pollingIntervalDecreased();
}
}
@@ -1200,8 +1238,7 @@ abstract class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
@GuardedBy("this")
private void logNetworkStability() {
if (LOG.isLoggable(INFO)) {
LOG.info(networkStability
+ " successful connections to own hidden service");
LOG.info("Network stability score " + networkStability);
}
}
}