xref: /openbmc/linux/net/batman-adv/send.h (revision a943e8bc058977663ba1e42389d4f5643cf2ae9e)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2007-2017  B.A.T.M.A.N. contributors:
3  *
4  * Marek Lindner, Simon Wunderlich
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of version 2 of the GNU General Public
8  * License as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #ifndef _NET_BATMAN_ADV_SEND_H_
20 #define _NET_BATMAN_ADV_SEND_H_
21 
22 #include "main.h"
23 
24 #include <linux/compiler.h>
25 #include <linux/spinlock.h>
26 #include <linux/types.h>
27 
28 #include "packet.h"
29 
30 struct sk_buff;
31 
32 void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet,
33 			     bool dropped);
34 struct batadv_forw_packet *
35 batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
36 			 struct batadv_hard_iface *if_outgoing,
37 			 atomic_t *queue_left,
38 			 struct batadv_priv *bat_priv,
39 			 struct sk_buff *skb);
40 bool batadv_forw_packet_steal(struct batadv_forw_packet *packet, spinlock_t *l);
41 void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
42 				    struct batadv_forw_packet *forw_packet,
43 				    unsigned long send_time);
44 bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet);
45 
46 int batadv_send_skb_to_orig(struct sk_buff *skb,
47 			    struct batadv_orig_node *orig_node,
48 			    struct batadv_hard_iface *recv_if);
49 int batadv_send_skb_packet(struct sk_buff *skb,
50 			   struct batadv_hard_iface *hard_iface,
51 			   const u8 *dst_addr);
52 int batadv_send_broadcast_skb(struct sk_buff *skb,
53 			      struct batadv_hard_iface *hard_iface);
54 int batadv_send_unicast_skb(struct sk_buff *skb,
55 			    struct batadv_neigh_node *neigh_node);
56 int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
57 				    const struct sk_buff *skb,
58 				    unsigned long delay,
59 				    bool own_packet);
60 void
61 batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
62 				 const struct batadv_hard_iface *hard_iface);
63 bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
64 					   struct sk_buff *skb,
65 					   struct batadv_orig_node *orig_node,
66 					   int packet_subtype);
67 int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
68 			    struct sk_buff *skb, int packet_type,
69 			    int packet_subtype,
70 			    struct batadv_orig_node *orig_node,
71 			    unsigned short vid);
72 int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
73 				   struct sk_buff *skb, int packet_type,
74 				   int packet_subtype, u8 *dst_hint,
75 				   unsigned short vid);
76 int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb,
77 			   unsigned short vid);
78 
79 /**
80  * batadv_send_skb_via_tt() - send an skb via TT lookup
81  * @bat_priv: the bat priv with all the soft interface information
82  * @skb: the payload to send
83  * @dst_hint: can be used to override the destination contained in the skb
84  * @vid: the vid to be used to search the translation table
85  *
86  * Look up the recipient node for the destination address in the ethernet
87  * header via the translation table. Wrap the given skb into a batman-adv
88  * unicast header. Then send this frame to the according destination node.
89  *
90  * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
91  */
92 static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv,
93 					 struct sk_buff *skb, u8 *dst_hint,
94 					 unsigned short vid)
95 {
96 	return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST, 0,
97 					      dst_hint, vid);
98 }
99 
100 /**
101  * batadv_send_skb_via_tt_4addr() - send an skb via TT lookup
102  * @bat_priv: the bat priv with all the soft interface information
103  * @skb: the payload to send
104  * @packet_subtype: the unicast 4addr packet subtype to use
105  * @dst_hint: can be used to override the destination contained in the skb
106  * @vid: the vid to be used to search the translation table
107  *
108  * Look up the recipient node for the destination address in the ethernet
109  * header via the translation table. Wrap the given skb into a batman-adv
110  * unicast-4addr header. Then send this frame to the according destination
111  * node.
112  *
113  * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
114  */
115 static inline int batadv_send_skb_via_tt_4addr(struct batadv_priv *bat_priv,
116 					       struct sk_buff *skb,
117 					       int packet_subtype,
118 					       u8 *dst_hint,
119 					       unsigned short vid)
120 {
121 	return batadv_send_skb_via_tt_generic(bat_priv, skb,
122 					      BATADV_UNICAST_4ADDR,
123 					      packet_subtype, dst_hint, vid);
124 }
125 
126 #endif /* _NET_BATMAN_ADV_SEND_H_ */
127