net/batman-adv/send.h

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