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Code Issues Projects Releases Wiki Activity

Correctly handle connectivity events on IPv6-only networks.

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This commit is contained in:
akwizgran
2020-03-12 16:43:46 +00:00
parent 6fb4b95b18
commit 0a666df164
1 changed files with 20 additions and 1 deletions
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21
bramble-android/src/main/java/org/briarproject/bramble/plugin/tcp/AndroidLanTcpPlugin.java
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@@ -252,7 +252,7 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
connectionStatusExecutor.execute(() -> {
State s = getState();
if (s != ACTIVE && s != INACTIVE) return;
Pair<InetAddress, Boolean> wifi = getWifiIpv4Address();
Pair<InetAddress, Boolean> wifi = getPreferredWifiAddress();
if (wifi == null) {
LOG.info("Not connected to wifi");
socketFactory = SocketFactory.getDefault();
@@ -280,4 +280,23 @@ class AndroidLanTcpPlugin extends LanTcpPlugin {
}
});
}
/**
* Returns a {@link Pair} where the first element is an IP address (IPv4 if
* available, otherwise IPv6) of the wifi interface and the second element
* is true if this device is providing an access point, or false if this
* device is a client. Returns null if this device isn't connected to wifi
* as an access point or client.
*/
@Nullable
private Pair<InetAddress, Boolean> getPreferredWifiAddress() {
Pair<InetAddress, Boolean> wifi = getWifiIpv4Address();
// If there's no wifi IPv4 address, we might be a client on an
// IPv6-only wifi network. We can only detect this on API 21+
if (wifi == null && SDK_INT >= 21) {
InetAddress ipv6 = getWifiClientIpv6Address();
if (ipv6 != null) return new Pair<>(ipv6, false);
}
return wifi;
}
}