/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 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_forw_bcast_packet(struct batadv_priv *bat_priv,
                             struct sk_buff *skb,
                             unsigned long delay,
                             bool own_packet);
void batadv_send_bcast_packet(struct batadv_priv *bat_priv,
                              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 mesh 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 mesh 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_ */