net/batman-adv/send.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2007-2019  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 #include <uapi/linux/batadv_packet.h>
  28
  29 struct sk_buff;
  30
  31 void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet,
  32                              bool dropped);
  33 struct batadv_forw_packet *
  34 batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
  35                          struct batadv_hard_iface *if_outgoing,
  36                          atomic_t *queue_left,
  37                          struct batadv_priv *bat_priv,
  38                          struct sk_buff *skb);
  39 bool batadv_forw_packet_steal(struct batadv_forw_packet *packet, spinlock_t *l);
  40 void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv,
  41                                     struct batadv_forw_packet *forw_packet,
  42                                     unsigned long send_time);
  43 bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet);
  44
  45 int batadv_send_skb_to_orig(struct sk_buff *skb,
  46                             struct batadv_orig_node *orig_node,
  47                             struct batadv_hard_iface *recv_if);
  48 int batadv_send_skb_packet(struct sk_buff *skb,
  49                            struct batadv_hard_iface *hard_iface,
  50                            const u8 *dst_addr);
  51 int batadv_send_broadcast_skb(struct sk_buff *skb,
  52                               struct batadv_hard_iface *hard_iface);
  53 int batadv_send_unicast_skb(struct sk_buff *skb,
  54                             struct batadv_neigh_node *neigh_node);
  55 int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
  56                                     const struct sk_buff *skb,
  57                                     unsigned long delay,
  58                                     bool own_packet);
  59 void
  60 batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
  61                                  const struct batadv_hard_iface *hard_iface);
  62 bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
  63                                            struct sk_buff *skb,
  64                                            struct batadv_orig_node *orig_node,
  65                                            int packet_subtype);
  66 int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
  67                             struct sk_buff *skb, int packet_type,
  68                             int packet_subtype,
  69                             struct batadv_orig_node *orig_node,
  70                             unsigned short vid);
  71 int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
  72                                    struct sk_buff *skb, int packet_type,
  73                                    int packet_subtype, u8 *dst_hint,
  74                                    unsigned short vid);
  75 int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb,
  76                            unsigned short vid);
  77
  78 /**
  79  * batadv_send_skb_via_tt() - send an skb via TT lookup
  80  * @bat_priv: the bat priv with all the soft interface information
  81  * @skb: the payload to send
  82  * @dst_hint: can be used to override the destination contained in the skb
  83  * @vid: the vid to be used to search the translation table
  84  *
  85  * Look up the recipient node for the destination address in the ethernet
  86  * header via the translation table. Wrap the given skb into a batman-adv
  87  * unicast header. Then send this frame to the according destination node.
  88  *
  89  * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
  90  */
  91 static inline int batadv_send_skb_via_tt(struct batadv_priv *bat_priv,
  92                                          struct sk_buff *skb, u8 *dst_hint,
  93                                          unsigned short vid)
  94 {
  95         return batadv_send_skb_via_tt_generic(bat_priv, skb, BATADV_UNICAST, 0,
  96                                               dst_hint, vid);
  97 }
  98
  99 /**
 100  * batadv_send_skb_via_tt_4addr() - send an skb via TT lookup
 101  * @bat_priv: the bat priv with all the soft interface information
 102  * @skb: the payload to send
 103  * @packet_subtype: the unicast 4addr packet subtype to use
 104  * @dst_hint: can be used to override the destination contained in the skb
 105  * @vid: the vid to be used to search the translation table
 106  *
 107  * Look up the recipient node for the destination address in the ethernet
 108  * header via the translation table. Wrap the given skb into a batman-adv
 109  * unicast-4addr header. Then send this frame to the according destination
 110  * node.
 111  *
 112  * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
 113  */
 114 static inline int batadv_send_skb_via_tt_4addr(struct batadv_priv *bat_priv,
 115                                                struct sk_buff *skb,
 116                                                int packet_subtype,
 117                                                u8 *dst_hint,
 118                                                unsigned short vid)
 119 {
 120         return batadv_send_skb_via_tt_generic(bat_priv, skb,
 121                                               BATADV_UNICAST_4ADDR,
 122                                               packet_subtype, dst_hint, vid);
 123 }
 124
 125 #endif /* _NET_BATMAN_ADV_SEND_H_ */