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

  /* Copyright (C) 2007-2019  B.A.T.M.A.N. contributors:

   *
   * Marek Lindner, Simon Wunderlich

   */
  
  #ifndef _NET_BATMAN_ADV_SEND_H_
  #define _NET_BATMAN_ADV_SEND_H_

  #include "main.h"
  
  #include <linux/compiler.h>

  #include <linux/skbuff.h>

  #include <linux/spinlock.h>

  #include <linux/types.h>

  #include <uapi/linux/batadv_packet.h>

  void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet,
  			     bool dropped);

  struct batadv_forw_packet *
  batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
  			 struct batadv_hard_iface *if_outgoing,
  			 atomic_t *queue_left,

  			 struct batadv_priv *bat_priv,
  			 struct sk_buff *skb);

  bool batadv_forw_packet_steal(struct batadv_forw_packet *packet, spinlock_t *l);
  void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
  				    struct batadv_forw_packet *forw_packet,
  				    unsigned long send_time);

  bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet);

  int batadv_send_skb_to_orig(struct sk_buff *skb,
  			    struct batadv_orig_node *orig_node,
  			    struct batadv_hard_iface *recv_if);

  int batadv_send_skb_packet(struct sk_buff *skb,
  			   struct batadv_hard_iface *hard_iface,
  			   const u8 *dst_addr);
  int batadv_send_broadcast_skb(struct sk_buff *skb,
  			      struct batadv_hard_iface *hard_iface);
  int batadv_send_unicast_skb(struct sk_buff *skb,
  			    struct batadv_neigh_node *neigh_node);

  int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,

  				    const struct sk_buff *skb,

  				    unsigned long delay,
  				    bool own_packet);

  void
  batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
  				 const struct batadv_hard_iface *hard_iface);

  bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
  					   struct sk_buff *skb,
  					   struct batadv_orig_node *orig_node,
  					   int packet_subtype);

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

  int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
  				   struct sk_buff *skb, int packet_type,

  				   int packet_subtype, u8 *dst_hint,

  				   unsigned short vid);

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

  
  /**

   * batadv_send_skb_via_tt() - send an skb via TT lookup

   * @bat_priv: the bat priv with all the soft interface information
   * @skb: the payload to send

   * @dst_hint: can be used to override the destination contained in the skb

   * @vid: the vid to be used to search the translation table

   *

   * Look up the recipient node for the destination address in the ethernet
   * header via the translation table. Wrap the given skb into a batman-adv
   * unicast header. Then send this frame to the according destination node.
   *

   * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.

   */

  static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv,

  					 struct sk_buff *skb, u8 *dst_hint,

  					 unsigned short vid)

  {

  	return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST, 0,

  					      dst_hint, vid);

  }
  
  /**

   * batadv_send_skb_via_tt_4addr() - send an skb via TT lookup

   * @bat_priv: the bat priv with all the soft interface information
   * @skb: the payload to send
   * @packet_subtype: the unicast 4addr packet subtype to use

   * @dst_hint: can be used to override the destination contained in the skb

   * @vid: the vid to be used to search the translation table

   *

   * Look up the recipient node for the destination address in the ethernet
   * header via the translation table. Wrap the given skb into a batman-adv
   * unicast-4addr header. Then send this frame to the according destination
   * node.
   *

   * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.

   */

  static inline int batadv_send_skb_via_tt_4addr(struct batadv_priv *bat_priv,
  					       struct sk_buff *skb,
  					       int packet_subtype,

  					       u8 *dst_hint,

  					       unsigned short vid)

  {

  	return batadv_send_skb_via_tt_generic(bat_priv, skb,
  					      BATADV_UNICAST_4ADDR,

  					      packet_subtype, dst_hint, vid);

  }

  
  #endif /* _NET_BATMAN_ADV_SEND_H_ */