/** @file

  ProtocolProbeSessionAccept

  @section license License

  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.

 */

#pragma once

#include "swoc/swoc_ip.h"

#include "iocore/net/SessionAccept.h"

struct ProtocolProbeSessionAcceptEnums {

  /// Enumeration for related groups of protocols.

  /// There is a child acceptor for each group which

  /// handles finer grained stuff.

  enum class ProtoGroupKey {

    HTTP,    ///< HTTP group (0.9-1.1)

    HTTP2,   ///< HTTP 2 group

    N_GROUPS ///< Size value.

  };

};

class ProtocolProbeSessionAccept : public SessionAccept, public ProtocolProbeSessionAcceptEnums

{

public:

  ProtocolProbeSessionAccept() : SessionAccept(nullptr)

  {

    memset(endpoint, 0, sizeof(endpoint));

    SET_HANDLER(&ProtocolProbeSessionAccept::mainEvent);

  }

  ~ProtocolProbeSessionAccept() override {}

  void registerEndpoint(ProtoGroupKey key, SessionAccept *ap);

  bool accept(NetVConnection *, MIOBuffer *, IOBufferReader *) override;

  // noncopyable

  ProtocolProbeSessionAccept(const ProtocolProbeSessionAccept &)            = delete; // disabled

  ProtocolProbeSessionAccept &operator=(const ProtocolProbeSessionAccept &) = delete; // disabled

  swoc::IPRangeSet *proxy_protocol_ipmap = nullptr;

private:

  int mainEvent(int event, void *netvc) override;

  /** Child acceptors, index by @c ProtoGroupKey

      We pass on the actual accept to one of these after doing protocol sniffing.

      We make it one larger and leave the last entry NULL so we don't have to

      do range checks on the enum value.

   */

  SessionAccept *endpoint[static_cast<int>(ProtoGroupKey::N_GROUPS) + 1];

  friend struct ProtocolProbeTrampoline;

};