text: /*
   *
   * Copyright (c) 2018 Cisco Systems, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   *   Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   *   Neither the name of the Cisco Systems, Inc. nor the names of its
   *   contributors may be used to endorse or promote products derived
   *   from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  /**
   * \file proto_identify.h
   *
   * \brief Protocol identification (header)
   */
  
  #ifndef JOY_PROTO_IDENTIFY_H
  #define JOY_PROTO_IDENTIFY_H
  
  #include <stdint.h>
  
  /* Values indicating direction of the flow */
  #define DIR_UNKNOWN 0
  #define DIR_CLIENT 1
  #define DIR_SERVER 2
  
  /**
   * \brief Protocol Inference container
   */
  struct pi_container {
      uint8_t dir; /* Flow direction */
      uint16_t app; /* Application protocol prediction */
  };
  
  int proto_identify_init(void);
  void proto_identify_cleanup(void);
  
  const struct pi_container *proto_identify_tcp(const char *tcp_data,
                                                unsigned int len);
  
  const struct pi_container *proto_identify_udp(const char *udp_data,
                                                unsigned int len);
  
  #endif /* JOY_PROTO_IDENTIFY_H */
  