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/*
* RED5 Open Source Media Server - https://github.com/Red5/
*
* Copyright 2006-2016 by respective authors (see below). All rights reserved.
*
* Licensed 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.red5.server.net.rtmp;
import java.lang.ref.WeakReference;
import java.util.HashSet;
import java.util.Set;
import org.apache.mina.core.session.IoSession;
import org.red5.io.object.StreamAction;
import org.red5.server.api.event.IEventDispatcher;
import org.red5.server.api.service.IPendingServiceCall;
import org.red5.server.api.service.IPendingServiceCallback;
import org.red5.server.api.service.IServiceCall;
import org.red5.server.api.stream.IClientStream;
import org.red5.server.net.ICommand;
import org.red5.server.net.IConnectionManager;
import org.red5.server.net.rtmp.codec.RTMP;
import org.red5.server.net.rtmp.event.BytesRead;
import org.red5.server.net.rtmp.event.ChunkSize;
import org.red5.server.net.rtmp.event.ClientBW;
import org.red5.server.net.rtmp.event.IRTMPEvent;
import org.red5.server.net.rtmp.event.Invoke;
import org.red5.server.net.rtmp.event.Notify;
import org.red5.server.net.rtmp.event.Ping;
import org.red5.server.net.rtmp.event.ServerBW;
import org.red5.server.net.rtmp.event.Unknown;
import org.red5.server.net.rtmp.message.Constants;
import org.red5.server.net.rtmp.message.Header;
import org.red5.server.net.rtmp.message.Packet;
import org.red5.server.net.rtmp.status.StatusCodes;
import org.red5.server.so.SharedObjectMessage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Base class for all RTMP handlers.
*
* @author The Red5 Project
*/
public abstract class BaseRTMPHandler implements IRTMPHandler, Constants, StatusCodes {
private static Logger log = LoggerFactory.getLogger(BaseRTMPHandler.class);
/** {@inheritDoc} */
public void connectionOpened(RTMPConnection conn) {
if (log.isTraceEnabled()) {
log.trace("connectionOpened - conn: {} state: {}", conn, conn.getState());
}
conn.open();
// start the wait for handshake
conn.startWaitForHandshake();
}
/** {@inheritDoc} */
public void messageReceived(RTMPConnection conn, Packet packet) throws Exception {
log.trace("messageReceived connection: {}", conn.getSessionId());
if (conn != null) {
IRTMPEvent message = null;
try {
message = packet.getMessage();
final Header header = packet.getHeader();
final Number streamId = header.getStreamId();
final Channel channel = conn.getChannel(header.getChannelId());
final IClientStream stream = conn.getStreamById(streamId);
if (log.isTraceEnabled()) {
log.trace("Message received - header: {}", header);
}
// set stream id on the connection
conn.setStreamId(streamId);
// increase number of received messages
conn.messageReceived();
// set the source of the message
message.setSource(conn);
// process based on data type
final byte headerDataType = header.getDataType();
if (log.isTraceEnabled()) {
log.trace("Header / message data type: {}", headerDataType);
}
switch (headerDataType) {
case TYPE_AGGREGATE:
log.debug("Aggregate type data - header timer: {} size: {}", header.getTimer(), header.getSize());
case TYPE_AUDIO_DATA:
case TYPE_VIDEO_DATA:
// mark the event as from a live source
// log.trace("Marking message as originating from a Live source");
message.setSourceType(Constants.SOURCE_TYPE_LIVE);
// NOTE: If we respond to "publish" with "NetStream.Publish.BadName",
// the client sends a few stream packets before stopping. We need to ignore them
if (stream != null) {
((IEventDispatcher) stream).dispatchEvent(message);
}
break;
case TYPE_FLEX_SHARED_OBJECT:
case TYPE_SHARED_OBJECT:
onSharedObject(conn, channel, header, (SharedObjectMessage) message);
break;
case TYPE_INVOKE:
case TYPE_FLEX_MESSAGE:
onCommand(conn, channel, header, (Invoke) message);
IPendingServiceCall call = ((Invoke) message).getCall();
if (message.getHeader().getStreamId().intValue() != 0 && call.getServiceName() == null && StreamAction.PUBLISH.equals(call.getServiceMethodName())) {
if (stream != null) {
// Only dispatch if stream really was created
((IEventDispatcher) stream).dispatchEvent(message);
}
}
break;
case TYPE_NOTIFY:
// like an invoke, but does not return anything and has a invoke / transaction id of 0
case TYPE_FLEX_STREAM_SEND:
if (((Notify) message).getData() != null && stream != null) {
// Stream metadata
((IEventDispatcher) stream).dispatchEvent(message);
} else {
onCommand(conn, channel, header, (Notify) message);
}
break;
case TYPE_PING:
onPing(conn, channel, header, (Ping) message);
break;
case TYPE_BYTES_READ:
onStreamBytesRead(conn, channel, header, (BytesRead) message);
break;
case TYPE_CHUNK_SIZE:
onChunkSize(conn, channel, header, (ChunkSize) message);
break;
case Constants.TYPE_CLIENT_BANDWIDTH: // onBWDone / peer bw
log.debug("Client bandwidth: {}", message);
onClientBandwidth(conn, channel, (ClientBW) message);
break;
case Constants.TYPE_SERVER_BANDWIDTH: // window ack size
log.debug("Server bandwidth: {}", message);
onServerBandwidth(conn, channel, (ServerBW) message);
break;
default:
log.debug("Unknown type: {}", header.getDataType());
}
if (message instanceof Unknown) {
log.info("Message type unknown: {}", message);
}
} catch (Throwable t) {
log.error("Exception", t);
}
// XXX this may be causing 'missing' data if previous methods are
// not making copies before buffering etc..
if (message != null) {
message.release();
}
}
}
/** {@inheritDoc} */
public void messageSent(RTMPConnection conn, Packet packet) {
log.trace("Message sent");
// increase number of sent messages
conn.messageSent(packet);
}
/** {@inheritDoc} */
public void connectionClosed(RTMPConnection conn) {
log.debug("connectionClosed: {}", conn.getSessionId());
if (conn.getStateCode() != RTMP.STATE_DISCONNECTED) {
// inform any callbacks for pending calls that the connection is closed
conn.sendPendingServiceCallsCloseError();
// close the connection
if (conn.getStateCode() != RTMP.STATE_DISCONNECTING) {
conn.close();
}
// set as disconnected
conn.setStateCode(RTMP.STATE_DISCONNECTED);
}
IoSession session = conn.getIoSession();
if (session != null && session.containsAttribute(RTMPConnection.RTMP_CONN_MANAGER)) {
@SuppressWarnings("unchecked")
IConnectionManager connManager = (IConnectionManager) ((WeakReference) session.getAttribute(RTMPConnection.RTMP_CONN_MANAGER)).get();
if (connManager != null) {
connManager.removeConnection(conn.getSessionId());
} else {
log.debug("Connection manager was not found in the session");
}
}
log.trace("connectionClosed: {}", conn);
}
/**
* Return hostname for URL.
*
* @param url
* URL
* @return Hostname from that URL
*/
protected String getHostname(String url) {
if (log.isDebugEnabled()) {
log.debug("getHostname - url: {}", url);
}
String[] parts = url.split("/");
if (parts.length == 2) {
return "";
} else {
String host = parts[2];
// strip out default port in case the client added the port explicitly
if (host.endsWith(":1935")) {
// remove default port from connection string
return host.substring(0, host.length() - 5);
}
return host;
}
}
/**
* Handler for pending call result. Dispatches results to all pending call handlers.
*
* @param conn
* Connection
* @param invoke
* Pending call result event context
*/
protected void handlePendingCallResult(RTMPConnection conn, Invoke invoke) {
final IServiceCall call = invoke.getCall();
final IPendingServiceCall pendingCall = conn.retrievePendingCall(invoke.getTransactionId());
if (pendingCall != null) {
// The client sent a response to a previously made call.
Object[] args = call.getArguments();
if (args != null && args.length > 0) {
// TODO: can a client return multiple results?
pendingCall.setResult(args[0]);
}
Set callbacks = pendingCall.getCallbacks();
if (!callbacks.isEmpty()) {
HashSet tmp = new HashSet<>();
tmp.addAll(callbacks);
for (IPendingServiceCallback callback : tmp) {
try {
callback.resultReceived(pendingCall);
} catch (Exception e) {
log.error("Error while executing callback {}", callback, e);
}
}
}
}
}
/**
* Chunk size change event handler. Abstract, to be implemented in subclasses.
*
* @param conn
* Connection
* @param channel
* Channel
* @param source
* Header
* @param chunkSize
* New chunk size
*/
protected abstract void onChunkSize(RTMPConnection conn, Channel channel, Header source, ChunkSize chunkSize);
/**
* Command event handler, which current consists of an Invoke or Notify type object.
*
* @param conn
* Connection
* @param channel
* Channel
* @param source
* Header
* @param command
* event context
*/
protected abstract void onCommand(RTMPConnection conn, Channel channel, Header source, ICommand command);
/**
* Ping event handler.
*
* @param conn
* Connection
* @param channel
* Channel
* @param source
* Header
* @param ping
* Ping event context
*/
protected abstract void onPing(RTMPConnection conn, Channel channel, Header source, Ping ping);
/**
* Server bandwidth / Window ACK size event handler.
*
* @param conn
* Connection
* @param channel
* Channel
* @param message
* ServerBW
*/
protected void onServerBandwidth(RTMPConnection conn, Channel channel, ServerBW message) {
}
/**
* Client bandwidth / Peer bandwidth set event handler.
*
* @param conn
* Connection
* @param channel
* Channel
* @param message
* ClientBW
*/
protected void onClientBandwidth(RTMPConnection conn, Channel channel, ClientBW message) {
}
/**
* Stream bytes read event handler.
*
* @param conn
* Connection
* @param channel
* Channel
* @param source
* Header
* @param streamBytesRead
* Bytes read event context
*/
protected void onStreamBytesRead(RTMPConnection conn, Channel channel, Header source, BytesRead streamBytesRead) {
conn.receivedBytesRead(streamBytesRead.getBytesRead());
}
/**
* Shared object event handler.
*
* @param conn
* Connection
* @param channel
* Channel
* @param source
* Header
* @param message
* Shared object message
*/
protected abstract void onSharedObject(RTMPConnection conn, Channel channel, Header source, SharedObjectMessage message);
}