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Code Issues Releases Wiki Activity

Refactoring

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This commit is contained in:
M66B 2024-01-06 13:14:23 +01:00
parent 98cf3a129d
commit 90d82ee029
1 changed files with 68 additions and 66 deletions
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134
app/src/main/java/eu/faircode/email/DnsHelper.java
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@ -143,72 +143,7 @@ public class DnsHelper {
AbstractDnsClient client = resolver.getClient();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q && !dns_custom)
client.setDataSource(new AbstractDnsDataSource() {
private IOException ex;
private DnsQueryResult result;
@Override
public DnsQueryResult query(DnsMessage query, InetAddress address, int port) throws IOException {
Semaphore sem = new Semaphore(0);
DnsResolver resolver = DnsResolver.getInstance();
Log.i("DNS Android query=" + query);
resolver.rawQuery(
null,
query.toArray(),
DnsResolver.FLAG_EMPTY,
new Executor() {
@Override
public void execute(Runnable command) {
command.run();
}
},
null,
new DnsResolver.Callback<byte[]>() {
@Override
public void onAnswer(@NonNull byte[] bytes, int rcode) {
try {
DnsMessage answer = new DnsMessage(bytes)
.asBuilder()
.setResponseCode(DnsMessage.RESPONSE_CODE.getResponseCode(rcode))
.build();
result = new StandardDnsQueryResult(
address, port,
DnsQueryResult.QueryMethod.udp,
query,
answer);
} catch (Throwable e) {
ex = new IOException(e.getMessage(), e);
} finally {
sem.release();
}
}
@Override
public void onError(@NonNull DnsResolver.DnsException e) {
try {
ex = new IOException(e.getMessage(), e);
} finally {
sem.release();
}
}
});
try {
if (!sem.tryAcquire(timeout, TimeUnit.SECONDS))
ex = new IOException("timeout");
} catch (InterruptedException e) {
ex = new IOException("interrupted");
}
if (ex == null) {
Log.i("DNS Android answer=" + result);
return result;
} else {
Log.i(ex);
throw ex;
}
}
});
client.setDataSource(new AndroidDataSource());
client.getDataSource().setTimeout(timeout * 1000);
@ -470,6 +405,73 @@ public class DnsHelper {
Log.w("- " + record);
}
static class AndroidDataSource extends AbstractDnsDataSource {
private IOException ex;
private DnsQueryResult result;
@Override
public DnsQueryResult query(DnsMessage query, InetAddress address, int port) throws IOException {
Semaphore sem = new Semaphore(0);
DnsResolver resolver = DnsResolver.getInstance();
Log.i("DNS Android query=" + query);
resolver.rawQuery(
null,
query.toArray(),
DnsResolver.FLAG_EMPTY,
new Executor() {
@Override
public void execute(Runnable command) {
command.run();
}
},
null,
new DnsResolver.Callback<byte[]>() {
@Override
public void onAnswer(@NonNull byte[] bytes, int rcode) {
try {
DnsMessage answer = new DnsMessage(bytes)
.asBuilder()
.setResponseCode(DnsMessage.RESPONSE_CODE.getResponseCode(rcode))
.build();
result = new StandardDnsQueryResult(
address, port,
DnsQueryResult.QueryMethod.udp,
query,
answer);
} catch (Throwable e) {
ex = new IOException(e.getMessage(), e);
} finally {
sem.release();
}
}
@Override
public void onError(@NonNull DnsResolver.DnsException e) {
try {
ex = new IOException(e.getMessage(), e);
} finally {
sem.release();
}
}
});
try {
if (!sem.tryAcquire(timeout, TimeUnit.SECONDS))
ex = new IOException("timeout");
} catch (InterruptedException e) {
ex = new IOException("interrupted");
}
if (ex == null) {
Log.i("DNS Android answer=" + result);
return result;
} else {
Log.i(ex);
throw ex;
}
}
}
static class DnsRecord {
String query;
String response;