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Server functionality for HBase
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.ipc;
import static org.apache.hadoop.hbase.HConstants.RPC_HEADER;
import io.opentelemetry.api.GlobalOpenTelemetry;
import io.opentelemetry.api.trace.Span;
import io.opentelemetry.context.Context;
import io.opentelemetry.context.Scope;
import io.opentelemetry.context.propagation.TextMapGetter;
import java.io.Closeable;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import java.util.Objects;
import java.util.Properties;
import org.apache.commons.crypto.cipher.CryptoCipherFactory;
import org.apache.commons.crypto.random.CryptoRandom;
import org.apache.commons.crypto.random.CryptoRandomFactory;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.client.VersionInfoUtil;
import org.apache.hadoop.hbase.codec.Codec;
import org.apache.hadoop.hbase.io.ByteBufferOutputStream;
import org.apache.hadoop.hbase.io.crypto.aes.CryptoAES;
import org.apache.hadoop.hbase.ipc.RpcServer.CallCleanup;
import org.apache.hadoop.hbase.nio.ByteBuff;
import org.apache.hadoop.hbase.security.AccessDeniedException;
import org.apache.hadoop.hbase.security.HBaseSaslRpcServer;
import org.apache.hadoop.hbase.security.SaslStatus;
import org.apache.hadoop.hbase.security.SaslUtil;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.security.provider.SaslServerAuthenticationProvider;
import org.apache.hadoop.hbase.security.provider.SaslServerAuthenticationProviders;
import org.apache.hadoop.hbase.security.provider.SimpleSaslServerAuthenticationProvider;
import org.apache.hadoop.hbase.trace.TraceUtil;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableUtils;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod;
import org.apache.hadoop.security.authorize.AuthorizationException;
import org.apache.hadoop.security.authorize.ProxyUsers;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hbase.thirdparty.com.google.protobuf.BlockingService;
import org.apache.hbase.thirdparty.com.google.protobuf.ByteInput;
import org.apache.hbase.thirdparty.com.google.protobuf.ByteString;
import org.apache.hbase.thirdparty.com.google.protobuf.CodedInputStream;
import org.apache.hbase.thirdparty.com.google.protobuf.Descriptors.MethodDescriptor;
import org.apache.hbase.thirdparty.com.google.protobuf.Message;
import org.apache.hbase.thirdparty.com.google.protobuf.TextFormat;
import org.apache.hbase.thirdparty.com.google.protobuf.UnsafeByteOperations;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.VersionInfo;
import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos;
import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.ConnectionHeader;
import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader;
import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.ResponseHeader;
import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.UserInformation;
import org.apache.hadoop.hbase.shaded.protobuf.generated.TracingProtos.RPCTInfo;
/** Reads calls from a connection and queues them for handling. */
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "VO_VOLATILE_INCREMENT",
justification = "False positive according to http://sourceforge.net/p/findbugs/bugs/1032/")
@InterfaceAudience.Private
abstract class ServerRpcConnection implements Closeable {
private static final TextMapGetter getter = new RPCTInfoGetter();
protected final RpcServer rpcServer;
// If the connection header has been read or not.
protected boolean connectionHeaderRead = false;
protected CallCleanup callCleanup;
// Cache the remote host & port info so that even if the socket is
// disconnected, we can say where it used to connect to.
protected String hostAddress;
protected int remotePort;
protected InetAddress addr;
protected ConnectionHeader connectionHeader;
/**
* Codec the client asked use.
*/
protected Codec codec;
/**
* Compression codec the client asked us use.
*/
protected CompressionCodec compressionCodec;
protected BlockingService service;
protected SaslServerAuthenticationProvider provider;
protected boolean skipInitialSaslHandshake;
protected boolean useSasl;
protected HBaseSaslRpcServer saslServer;
// was authentication allowed with a fallback to simple auth
protected boolean authenticatedWithFallback;
protected boolean retryImmediatelySupported = false;
protected User user = null;
protected UserGroupInformation ugi = null;
protected SaslServerAuthenticationProviders saslProviders = null;
public ServerRpcConnection(RpcServer rpcServer) {
this.rpcServer = rpcServer;
this.callCleanup = null;
this.saslProviders = SaslServerAuthenticationProviders.getInstance(rpcServer.getConf());
}
@Override
public String toString() {
return getHostAddress() + ":" + remotePort;
}
public String getHostAddress() {
return hostAddress;
}
public InetAddress getHostInetAddress() {
return addr;
}
public int getRemotePort() {
return remotePort;
}
public VersionInfo getVersionInfo() {
if (connectionHeader != null && connectionHeader.hasVersionInfo()) {
return connectionHeader.getVersionInfo();
}
return null;
}
private String getFatalConnectionString(final int version, final byte authByte) {
return "serverVersion=" + RpcServer.CURRENT_VERSION + ", clientVersion=" + version
+ ", authMethod=" + authByte +
// The provider may be null if we failed to parse the header of the request
", authName=" + (provider == null ? "unknown" : provider.getSaslAuthMethod().getName())
+ " from " + toString();
}
/**
* Set up cell block codecs
*/
private void setupCellBlockCodecs() throws FatalConnectionException {
// TODO: Plug in other supported decoders.
if (!connectionHeader.hasCellBlockCodecClass()) {
return;
}
String className = connectionHeader.getCellBlockCodecClass();
if (className == null || className.length() == 0) {
return;
}
try {
this.codec = (Codec) Class.forName(className).getDeclaredConstructor().newInstance();
} catch (Exception e) {
throw new UnsupportedCellCodecException(className, e);
}
if (!connectionHeader.hasCellBlockCompressorClass()) {
return;
}
className = connectionHeader.getCellBlockCompressorClass();
try {
this.compressionCodec =
(CompressionCodec) Class.forName(className).getDeclaredConstructor().newInstance();
} catch (Exception e) {
throw new UnsupportedCompressionCodecException(className, e);
}
}
/**
* Set up cipher for rpc encryption with Apache Commons Crypto.
*/
private Pair setupCryptoCipher()
throws FatalConnectionException {
// If simple auth, return
if (saslServer == null) {
return null;
}
// check if rpc encryption with Crypto AES
String qop = saslServer.getNegotiatedQop();
boolean isEncryption = SaslUtil.QualityOfProtection.PRIVACY.getSaslQop().equalsIgnoreCase(qop);
boolean isCryptoAesEncryption = isEncryption
&& this.rpcServer.conf.getBoolean("hbase.rpc.crypto.encryption.aes.enabled", false);
if (!isCryptoAesEncryption) {
return null;
}
if (!connectionHeader.hasRpcCryptoCipherTransformation()) {
return null;
}
String transformation = connectionHeader.getRpcCryptoCipherTransformation();
if (transformation == null || transformation.length() == 0) {
return null;
}
// Negotiates AES based on complete saslServer.
// The Crypto metadata need to be encrypted and send to client.
Properties properties = new Properties();
// the property for SecureRandomFactory
properties.setProperty(CryptoRandomFactory.CLASSES_KEY,
this.rpcServer.conf.get("hbase.crypto.sasl.encryption.aes.crypto.random",
"org.apache.commons.crypto.random.JavaCryptoRandom"));
// the property for cipher class
properties.setProperty(CryptoCipherFactory.CLASSES_KEY,
this.rpcServer.conf.get("hbase.rpc.crypto.encryption.aes.cipher.class",
"org.apache.commons.crypto.cipher.JceCipher"));
int cipherKeyBits =
this.rpcServer.conf.getInt("hbase.rpc.crypto.encryption.aes.cipher.keySizeBits", 128);
// generate key and iv
if (cipherKeyBits % 8 != 0) {
throw new IllegalArgumentException(
"The AES cipher key size in bits" + " should be a multiple of byte");
}
int len = cipherKeyBits / 8;
byte[] inKey = new byte[len];
byte[] outKey = new byte[len];
byte[] inIv = new byte[len];
byte[] outIv = new byte[len];
CryptoAES cryptoAES;
try {
// generate the cipher meta data with SecureRandom
CryptoRandom secureRandom = CryptoRandomFactory.getCryptoRandom(properties);
secureRandom.nextBytes(inKey);
secureRandom.nextBytes(outKey);
secureRandom.nextBytes(inIv);
secureRandom.nextBytes(outIv);
// create CryptoAES for server
cryptoAES = new CryptoAES(transformation, properties, inKey, outKey, inIv, outIv);
} catch (GeneralSecurityException | IOException ex) {
throw new UnsupportedCryptoException(ex.getMessage(), ex);
}
// create SaslCipherMeta and send to client,
// for client, the [inKey, outKey], [inIv, outIv] should be reversed
RPCProtos.CryptoCipherMeta.Builder ccmBuilder = RPCProtos.CryptoCipherMeta.newBuilder();
ccmBuilder.setTransformation(transformation);
ccmBuilder.setInIv(getByteString(outIv));
ccmBuilder.setInKey(getByteString(outKey));
ccmBuilder.setOutIv(getByteString(inIv));
ccmBuilder.setOutKey(getByteString(inKey));
RPCProtos.ConnectionHeaderResponse resp =
RPCProtos.ConnectionHeaderResponse.newBuilder().setCryptoCipherMeta(ccmBuilder).build();
return Pair.newPair(resp, cryptoAES);
}
private ByteString getByteString(byte[] bytes) {
// return singleton to reduce object allocation
return (bytes.length == 0) ? ByteString.EMPTY : ByteString.copyFrom(bytes);
}
private UserGroupInformation createUser(ConnectionHeader head) {
UserGroupInformation ugi = null;
if (!head.hasUserInfo()) {
return null;
}
UserInformation userInfoProto = head.getUserInfo();
String effectiveUser = null;
if (userInfoProto.hasEffectiveUser()) {
effectiveUser = userInfoProto.getEffectiveUser();
}
String realUser = null;
if (userInfoProto.hasRealUser()) {
realUser = userInfoProto.getRealUser();
}
if (effectiveUser != null) {
if (realUser != null) {
UserGroupInformation realUserUgi = UserGroupInformation.createRemoteUser(realUser);
ugi = UserGroupInformation.createProxyUser(effectiveUser, realUserUgi);
} else {
ugi = UserGroupInformation.createRemoteUser(effectiveUser);
}
}
return ugi;
}
protected final void disposeSasl() {
if (saslServer != null) {
saslServer.dispose();
saslServer = null;
}
}
/**
* No protobuf encoding of raw sasl messages
*/
protected final void doRawSaslReply(SaslStatus status, Writable rv, String errorClass,
String error) throws IOException {
BufferChain bc;
// In my testing, have noticed that sasl messages are usually
// in the ballpark of 100-200. That's why the initial capacity is 256.
try (ByteBufferOutputStream saslResponse = new ByteBufferOutputStream(256);
DataOutputStream out = new DataOutputStream(saslResponse)) {
out.writeInt(status.state); // write status
if (status == SaslStatus.SUCCESS) {
rv.write(out);
} else {
WritableUtils.writeString(out, errorClass);
WritableUtils.writeString(out, error);
}
bc = new BufferChain(saslResponse.getByteBuffer());
}
doRespond(() -> bc);
}
HBaseSaslRpcServer getOrCreateSaslServer() throws IOException {
if (saslServer == null) {
saslServer = new HBaseSaslRpcServer(provider, rpcServer.saslProps, rpcServer.secretManager);
}
return saslServer;
}
void finishSaslNegotiation() throws IOException {
String qop = saslServer.getNegotiatedQop();
ugi = provider.getAuthorizedUgi(saslServer.getAuthorizationID(), this.rpcServer.secretManager);
RpcServer.LOG.debug(
"SASL server context established. Authenticated client: {}. Negotiated QoP is {}", ugi, qop);
rpcServer.metrics.authenticationSuccess();
RpcServer.AUDITLOG.info(RpcServer.AUTH_SUCCESSFUL_FOR + ugi);
}
public void processOneRpc(ByteBuff buf) throws IOException, InterruptedException {
if (connectionHeaderRead) {
processRequest(buf);
} else {
processConnectionHeader(buf);
callCleanupIfNeeded();
this.connectionHeaderRead = true;
if (rpcServer.needAuthorization() && !authorizeConnection()) {
// Throw FatalConnectionException wrapping ACE so client does right thing and closes
// down the connection instead of trying to read non-existent retun.
throw new AccessDeniedException("Connection from " + this + " for service "
+ connectionHeader.getServiceName() + " is unauthorized for user: " + ugi);
}
this.user = this.rpcServer.userProvider.create(this.ugi);
}
}
private boolean authorizeConnection() throws IOException {
try {
// If auth method is DIGEST, the token was obtained by the
// real user for the effective user, therefore not required to
// authorize real user. doAs is allowed only for simple or kerberos
// authentication
if (ugi != null && ugi.getRealUser() != null && provider.supportsProtocolAuthentication()) {
ProxyUsers.authorize(ugi, this.getHostAddress(), this.rpcServer.conf);
}
this.rpcServer.authorize(ugi, connectionHeader, getHostInetAddress());
this.rpcServer.metrics.authorizationSuccess();
} catch (AuthorizationException ae) {
if (RpcServer.LOG.isDebugEnabled()) {
RpcServer.LOG.debug("Connection authorization failed: " + ae.getMessage(), ae);
}
this.rpcServer.metrics.authorizationFailure();
doRespond(getErrorResponse(ae.getMessage(), new AccessDeniedException(ae)));
return false;
}
return true;
}
private CodedInputStream createCis(ByteBuff buf) {
// Here we read in the header. We avoid having pb
// do its default 4k allocation for CodedInputStream. We force it to use
// backing array.
CodedInputStream cis;
if (buf.hasArray()) {
cis = UnsafeByteOperations
.unsafeWrap(buf.array(), buf.arrayOffset() + buf.position(), buf.limit()).newCodedInput();
} else {
cis = UnsafeByteOperations.unsafeWrap(new ByteBuffByteInput(buf, buf.limit()), 0, buf.limit())
.newCodedInput();
}
cis.enableAliasing(true);
return cis;
}
// Reads the connection header following version
private void processConnectionHeader(ByteBuff buf) throws IOException {
this.connectionHeader = ConnectionHeader.parseFrom(createCis(buf));
String serviceName = connectionHeader.getServiceName();
if (serviceName == null) {
throw new EmptyServiceNameException();
}
this.service = RpcServer.getService(this.rpcServer.services, serviceName);
if (this.service == null) {
throw new UnknownServiceException(serviceName);
}
setupCellBlockCodecs();
sendConnectionHeaderResponseIfNeeded();
UserGroupInformation protocolUser = createUser(connectionHeader);
if (!useSasl) {
ugi = protocolUser;
if (ugi != null) {
ugi.setAuthenticationMethod(AuthenticationMethod.SIMPLE);
}
// audit logging for SASL authenticated users happens in saslReadAndProcess()
if (authenticatedWithFallback) {
RpcServer.LOG.warn("Allowed fallback to SIMPLE auth for {} connecting from {}", ugi,
getHostAddress());
}
} else {
// user is authenticated
ugi.setAuthenticationMethod(provider.getSaslAuthMethod().getAuthMethod());
// Now we check if this is a proxy user case. If the protocol user is
// different from the 'user', it is a proxy user scenario. However,
// this is not allowed if user authenticated with DIGEST.
if ((protocolUser != null) && (!protocolUser.getUserName().equals(ugi.getUserName()))) {
if (!provider.supportsProtocolAuthentication()) {
// Not allowed to doAs if token authentication is used
throw new AccessDeniedException("Authenticated user (" + ugi
+ ") doesn't match what the client claims to be (" + protocolUser + ")");
} else {
// Effective user can be different from authenticated user
// for simple auth or kerberos auth
// The user is the real user. Now we create a proxy user
UserGroupInformation realUser = ugi;
ugi = UserGroupInformation.createProxyUser(protocolUser.getUserName(), realUser);
// Now the user is a proxy user, set Authentication method Proxy.
ugi.setAuthenticationMethod(AuthenticationMethod.PROXY);
}
}
}
String version;
if (this.connectionHeader.hasVersionInfo()) {
// see if this connection will support RetryImmediatelyException
this.retryImmediatelySupported = VersionInfoUtil.hasMinimumVersion(getVersionInfo(), 1, 2);
version = this.connectionHeader.getVersionInfo().getVersion();
} else {
version = "UNKNOWN";
}
RpcServer.AUDITLOG.info("Connection from {}:{}, version={}, sasl={}, ugi={}, service={}",
this.hostAddress, this.remotePort, version, this.useSasl, this.ugi, serviceName);
}
/**
* Send the response for connection header
*/
private void sendConnectionHeaderResponseIfNeeded() throws FatalConnectionException {
Pair pair = setupCryptoCipher();
// Response the connection header if Crypto AES is enabled
if (pair == null) {
return;
}
try {
int size = pair.getFirst().getSerializedSize();
BufferChain bc;
try (ByteBufferOutputStream bbOut = new ByteBufferOutputStream(4 + size);
DataOutputStream out = new DataOutputStream(bbOut)) {
out.writeInt(size);
pair.getFirst().writeTo(out);
bc = new BufferChain(bbOut.getByteBuffer());
}
doRespond(new RpcResponse() {
@Override
public BufferChain getResponse() {
return bc;
}
@Override
public void done() {
// must switch after sending the connection header response, as the client still uses the
// original SaslClient to unwrap the data we send back
saslServer.switchToCryptoAES(pair.getSecond());
}
});
} catch (IOException ex) {
throw new UnsupportedCryptoException(ex.getMessage(), ex);
}
}
protected abstract void doRespond(RpcResponse resp) throws IOException;
/**
* Has the request header and the request param and optionally encoded data buffer all in this one
* array.
*
* Will be overridden in tests.
*/
protected void processRequest(ByteBuff buf) throws IOException, InterruptedException {
long totalRequestSize = buf.limit();
int offset = 0;
// Here we read in the header. We avoid having pb
// do its default 4k allocation for CodedInputStream. We force it to use
// backing array.
CodedInputStream cis = createCis(buf);
int headerSize = cis.readRawVarint32();
offset = cis.getTotalBytesRead();
Message.Builder builder = RequestHeader.newBuilder();
ProtobufUtil.mergeFrom(builder, cis, headerSize);
RequestHeader header = (RequestHeader) builder.build();
offset += headerSize;
Context traceCtx = GlobalOpenTelemetry.getPropagators().getTextMapPropagator()
.extract(Context.current(), header.getTraceInfo(), getter);
// n.b. Management of this Span instance is a little odd. Most exit paths from this try scope
// are early-exits due to error cases. There's only one success path, the asynchronous call to
// RpcScheduler#dispatch. The success path assumes ownership of the span, which is represented
// by null-ing out the reference in this scope. All other paths end the span. Thus, and in
// order to avoid accidentally orphaning the span, the call to Span#end happens in a finally
// block iff the span is non-null.
Span span = TraceUtil.createRemoteSpan("RpcServer.process", traceCtx);
try (Scope ignored = span.makeCurrent()) {
int id = header.getCallId();
if (RpcServer.LOG.isTraceEnabled()) {
RpcServer.LOG.trace("RequestHeader " + TextFormat.shortDebugString(header)
+ " totalRequestSize: " + totalRequestSize + " bytes");
}
// Enforcing the call queue size, this triggers a retry in the client
// This is a bit late to be doing this check - we have already read in the
// total request.
if (
(totalRequestSize + this.rpcServer.callQueueSizeInBytes.sum())
> this.rpcServer.maxQueueSizeInBytes
) {
final ServerCall callTooBig = createCall(id, this.service, null, null, null, null,
totalRequestSize, null, 0, this.callCleanup);
this.rpcServer.metrics.exception(RpcServer.CALL_QUEUE_TOO_BIG_EXCEPTION);
callTooBig.setResponse(null, null, RpcServer.CALL_QUEUE_TOO_BIG_EXCEPTION,
"Call queue is full on " + this.rpcServer.server.getServerName()
+ ", is hbase.ipc.server.max.callqueue.size too small?");
TraceUtil.setError(span, RpcServer.CALL_QUEUE_TOO_BIG_EXCEPTION);
callTooBig.sendResponseIfReady();
return;
}
MethodDescriptor md = null;
Message param = null;
CellScanner cellScanner = null;
try {
if (header.hasRequestParam() && header.getRequestParam()) {
md = this.service.getDescriptorForType().findMethodByName(header.getMethodName());
if (md == null) {
throw new UnsupportedOperationException(header.getMethodName());
}
builder = this.service.getRequestPrototype(md).newBuilderForType();
cis.resetSizeCounter();
int paramSize = cis.readRawVarint32();
offset += cis.getTotalBytesRead();
if (builder != null) {
ProtobufUtil.mergeFrom(builder, cis, paramSize);
param = builder.build();
}
offset += paramSize;
} else {
// currently header must have request param, so we directly throw
// exception here
String msg = "Invalid request header: " + TextFormat.shortDebugString(header)
+ ", should have param set in it";
RpcServer.LOG.warn(msg);
throw new DoNotRetryIOException(msg);
}
if (header.hasCellBlockMeta()) {
buf.position(offset);
ByteBuff dup = buf.duplicate();
dup.limit(offset + header.getCellBlockMeta().getLength());
cellScanner = this.rpcServer.cellBlockBuilder.createCellScannerReusingBuffers(this.codec,
this.compressionCodec, dup);
}
} catch (Throwable thrown) {
InetSocketAddress address = this.rpcServer.getListenerAddress();
String msg = (address != null ? address : "(channel closed)")
+ " is unable to read call parameter from client " + getHostAddress();
RpcServer.LOG.warn(msg, thrown);
this.rpcServer.metrics.exception(thrown);
final Throwable responseThrowable;
if (thrown instanceof LinkageError) {
// probably the hbase hadoop version does not match the running hadoop version
responseThrowable = new DoNotRetryIOException(thrown);
} else if (thrown instanceof UnsupportedOperationException) {
// If the method is not present on the server, do not retry.
responseThrowable = new DoNotRetryIOException(thrown);
} else {
responseThrowable = thrown;
}
ServerCall readParamsFailedCall = createCall(id, this.service, null, null, null, null,
totalRequestSize, null, 0, this.callCleanup);
readParamsFailedCall.setResponse(null, null, responseThrowable,
msg + "; " + responseThrowable.getMessage());
TraceUtil.setError(span, responseThrowable);
readParamsFailedCall.sendResponseIfReady();
return;
}
int timeout = 0;
if (header.hasTimeout() && header.getTimeout() > 0) {
timeout = Math.max(this.rpcServer.minClientRequestTimeout, header.getTimeout());
}
ServerCall call = createCall(id, this.service, md, header, param, cellScanner,
totalRequestSize, this.addr, timeout, this.callCleanup);
if (this.rpcServer.scheduler.dispatch(new CallRunner(this.rpcServer, call))) {
// unset span do that it's not closed in the finally block
span = null;
} else {
this.rpcServer.callQueueSizeInBytes.add(-1 * call.getSize());
this.rpcServer.metrics.exception(RpcServer.CALL_QUEUE_TOO_BIG_EXCEPTION);
call.setResponse(null, null, RpcServer.CALL_QUEUE_TOO_BIG_EXCEPTION,
"Call queue is full on " + this.rpcServer.server.getServerName()
+ ", too many items queued ?");
TraceUtil.setError(span, RpcServer.CALL_QUEUE_TOO_BIG_EXCEPTION);
call.sendResponseIfReady();
}
} finally {
if (span != null) {
span.end();
}
}
}
protected final RpcResponse getErrorResponse(String msg, Exception e) throws IOException {
ResponseHeader.Builder headerBuilder = ResponseHeader.newBuilder().setCallId(-1);
ServerCall.setExceptionResponse(e, msg, headerBuilder);
ByteBuffer headerBuf =
ServerCall.createHeaderAndMessageBytes(null, headerBuilder.build(), 0, null);
BufferChain buf = new BufferChain(headerBuf);
return () -> buf;
}
private void doBadPreambleHandling(String msg) throws IOException {
doBadPreambleHandling(msg, new FatalConnectionException(msg));
}
private void doBadPreambleHandling(String msg, Exception e) throws IOException {
RpcServer.LOG.warn(msg);
doRespond(getErrorResponse(msg, e));
}
protected final void callCleanupIfNeeded() {
if (callCleanup != null) {
callCleanup.run();
callCleanup = null;
}
}
protected final boolean processPreamble(ByteBuffer preambleBuffer) throws IOException {
assert preambleBuffer.remaining() == 6;
for (int i = 0; i < RPC_HEADER.length; i++) {
if (RPC_HEADER[i] != preambleBuffer.get()) {
doBadPreambleHandling(
"Expected HEADER=" + Bytes.toStringBinary(RPC_HEADER) + " but received HEADER="
+ Bytes.toStringBinary(preambleBuffer.array(), 0, RPC_HEADER.length) + " from "
+ toString());
return false;
}
}
int version = preambleBuffer.get() & 0xFF;
byte authbyte = preambleBuffer.get();
if (version != RpcServer.CURRENT_VERSION) {
String msg = getFatalConnectionString(version, authbyte);
doBadPreambleHandling(msg, new WrongVersionException(msg));
return false;
}
this.provider = this.saslProviders.selectProvider(authbyte);
if (this.provider == null) {
String msg = getFatalConnectionString(version, authbyte);
doBadPreambleHandling(msg, new BadAuthException(msg));
return false;
}
// TODO this is a wart while simple auth'n doesn't go through sasl.
if (this.rpcServer.isSecurityEnabled && isSimpleAuthentication()) {
if (this.rpcServer.allowFallbackToSimpleAuth) {
this.rpcServer.metrics.authenticationFallback();
authenticatedWithFallback = true;
} else {
AccessDeniedException ae = new AccessDeniedException("Authentication is required");
doRespond(getErrorResponse(ae.getMessage(), ae));
return false;
}
}
if (!this.rpcServer.isSecurityEnabled && !isSimpleAuthentication()) {
doRawSaslReply(SaslStatus.SUCCESS, new IntWritable(SaslUtil.SWITCH_TO_SIMPLE_AUTH), null,
null);
provider = saslProviders.getSimpleProvider();
// client has already sent the initial Sasl message and we
// should ignore it. Both client and server should fall back
// to simple auth from now on.
skipInitialSaslHandshake = true;
}
useSasl = !(provider instanceof SimpleSaslServerAuthenticationProvider);
return true;
}
boolean isSimpleAuthentication() {
return Objects.requireNonNull(provider) instanceof SimpleSaslServerAuthenticationProvider;
}
public abstract boolean isConnectionOpen();
public abstract ServerCall createCall(int id, BlockingService service, MethodDescriptor md,
RequestHeader header, Message param, CellScanner cellScanner, long size,
InetAddress remoteAddress, int timeout, CallCleanup reqCleanup);
private static class ByteBuffByteInput extends ByteInput {
private ByteBuff buf;
private int length;
ByteBuffByteInput(ByteBuff buf, int length) {
this.buf = buf;
this.length = length;
}
@Override
public byte read(int offset) {
return this.buf.get(offset);
}
@Override
public int read(int offset, byte[] out, int outOffset, int len) {
this.buf.get(offset, out, outOffset, len);
return len;
}
@Override
public int read(int offset, ByteBuffer out) {
int len = out.remaining();
this.buf.get(out, offset, len);
return len;
}
@Override
public int size() {
return this.length;
}
}
}