1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner, Simon Wunderlich
5 */
6
7#ifndef _NET_BATMAN_ADV_SEND_H_
8#define _NET_BATMAN_ADV_SEND_H_
9
10#include "main.h"
11
12#include <linux/compiler.h>
13#include <linux/skbuff.h>
14#include <linux/spinlock.h>
15#include <linux/types.h>
16#include <uapi/linux/batadv_packet.h>
17
18void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet,
19			     bool dropped);
20struct batadv_forw_packet *
21batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
22			 struct batadv_hard_iface *if_outgoing,
23			 atomic_t *queue_left,
24			 struct batadv_priv *bat_priv,
25			 struct sk_buff *skb);
26bool batadv_forw_packet_steal(struct batadv_forw_packet *packet, spinlock_t *l);
27void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
28				    struct batadv_forw_packet *forw_packet,
29				    unsigned long send_time);
30bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet);
31
32int batadv_send_skb_to_orig(struct sk_buff *skb,
33			    struct batadv_orig_node *orig_node,
34			    struct batadv_hard_iface *recv_if);
35int batadv_send_skb_packet(struct sk_buff *skb,
36			   struct batadv_hard_iface *hard_iface,
37			   const u8 *dst_addr);
38int batadv_send_broadcast_skb(struct sk_buff *skb,
39			      struct batadv_hard_iface *hard_iface);
40int batadv_send_unicast_skb(struct sk_buff *skb,
41			    struct batadv_neigh_node *neigh_node);
42int batadv_forw_bcast_packet(struct batadv_priv *bat_priv,
43			     struct sk_buff *skb,
44			     unsigned long delay,
45			     bool own_packet);
46void batadv_send_bcast_packet(struct batadv_priv *bat_priv,
47			      struct sk_buff *skb,
48			      unsigned long delay,
49			      bool own_packet);
50void
51batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
52				 const struct batadv_hard_iface *hard_iface);
53bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
54					   struct sk_buff *skb,
55					   struct batadv_orig_node *orig_node,
56					   int packet_subtype);
57int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
58			    struct sk_buff *skb, int packet_type,
59			    int packet_subtype,
60			    struct batadv_orig_node *orig_node,
61			    unsigned short vid);
62int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
63				   struct sk_buff *skb, int packet_type,
64				   int packet_subtype, u8 *dst_hint,
65				   unsigned short vid);
66int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb,
67			   unsigned short vid);
68
69/**
70 * batadv_send_skb_via_tt() - send an skb via TT lookup
71 * @bat_priv: the bat priv with all the soft interface information
72 * @skb: the payload to send
73 * @dst_hint: can be used to override the destination contained in the skb
74 * @vid: the vid to be used to search the translation table
75 *
76 * Look up the recipient node for the destination address in the ethernet
77 * header via the translation table. Wrap the given skb into a batman-adv
78 * unicast header. Then send this frame to the according destination node.
79 *
80 * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
81 */
82static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv,
83					 struct sk_buff *skb, u8 *dst_hint,
84					 unsigned short vid)
85{
86	return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST, 0,
87					      dst_hint, vid);
88}
89
90/**
91 * batadv_send_skb_via_tt_4addr() - send an skb via TT lookup
92 * @bat_priv: the bat priv with all the soft interface information
93 * @skb: the payload to send
94 * @packet_subtype: the unicast 4addr packet subtype to use
95 * @dst_hint: can be used to override the destination contained in the skb
96 * @vid: the vid to be used to search the translation table
97 *
98 * Look up the recipient node for the destination address in the ethernet
99 * header via the translation table. Wrap the given skb into a batman-adv
100 * unicast-4addr header. Then send this frame to the according destination
101 * node.
102 *
103 * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
104 */
105static inline int batadv_send_skb_via_tt_4addr(struct batadv_priv *bat_priv,
106					       struct sk_buff *skb,
107					       int packet_subtype,
108					       u8 *dst_hint,
109					       unsigned short vid)
110{
111	return batadv_send_skb_via_tt_generic(bat_priv, skb,
112					      BATADV_UNICAST_4ADDR,
113					      packet_subtype, dst_hint, vid);
114}
115
116#endif /* _NET_BATMAN_ADV_SEND_H_ */
117