/* SPDX-License-Identifier: GPL-2.0 */

  /* Copyright (C) 2014-2020  B.A.T.M.A.N. contributors:

   *
   * Linus Lüssing

   */
  
  #ifndef _NET_BATMAN_ADV_MULTICAST_H_
  #define _NET_BATMAN_ADV_MULTICAST_H_

  #include "main.h"

  #include <linux/netlink.h>
  #include <linux/seq_file.h>
  #include <linux/skbuff.h>

  /**

   * enum batadv_forw_mode - the way a packet should be forwarded as

   */
  enum batadv_forw_mode {

  	/**
  	 * @BATADV_FORW_ALL: forward the packet to all nodes (currently via
  	 *  classic flooding)
  	 */

  	BATADV_FORW_ALL,

  
  	/**

  	 * @BATADV_FORW_SOME: forward the packet to some nodes (currently via
  	 *  a multicast-to-unicast conversion and the BATMAN unicast routing
  	 *  protocol)
  	 */
  	BATADV_FORW_SOME,
  
  	/**

  	 * @BATADV_FORW_SINGLE: forward the packet to a single node (currently
  	 *  via the BATMAN unicast routing protocol)
  	 */

  	BATADV_FORW_SINGLE,

  
  	/** @BATADV_FORW_NONE: don't forward, drop it */

  	BATADV_FORW_NONE,
  };

  #ifdef CONFIG_BATMAN_ADV_MCAST

  enum batadv_forw_mode
  batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  		       struct batadv_orig_node **mcast_single_orig);

  int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  				struct sk_buff *skb,
  				unsigned short vid,
  				struct batadv_orig_node *orig_node);

  int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  			   unsigned short vid);

  void batadv_mcast_init(struct batadv_priv *bat_priv);

  int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);

  int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  			       struct batadv_priv *bat_priv);
  
  int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);

  void batadv_mcast_free(struct batadv_priv *bat_priv);

  void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);

  #else

  static inline enum batadv_forw_mode
  batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  		       struct batadv_orig_node **mcast_single_orig)
  {
  	return BATADV_FORW_ALL;
  }

  static inline int

  batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  			    struct sk_buff *skb,
  			    unsigned short vid,
  			    struct batadv_orig_node *orig_node)
  {
  	kfree_skb(skb);
  	return NET_XMIT_DROP;
  }
  
  static inline int

  batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  		       unsigned short vid)
  {
  	kfree_skb(skb);
  	return NET_XMIT_DROP;
  }

  static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  {
  	return 0;
  }

  static inline int
  batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
  {
  	return 0;
  }
  
  static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
  					  struct netlink_callback *cb)
  {
  	return -EOPNOTSUPP;
  }

  static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
  {

  }

  static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
  {

  }

  #endif /* CONFIG_BATMAN_ADV_MCAST */
  
  #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */