net/batman-adv/fragmentation.h

   1 /* Copyright (C) 2013-2015 B.A.T.M.A.N. contributors:
   2  *
   3  * Martin Hundebøll <martin@hundeboll.net>
   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_FRAGMENTATION_H_
  19 #define _NET_BATMAN_ADV_FRAGMENTATION_H_
  20
  21 #include "main.h"
  22
  23 #include <linux/compiler.h>
  24 #include <linux/list.h>
  25 #include <linux/stddef.h>
  26 #include <linux/types.h>
  27
  28 struct sk_buff;
  29
  30 void batadv_frag_purge_orig(struct batadv_orig_node *orig,
  31                             bool (*check_cb)(struct batadv_frag_table_entry *));
  32 bool batadv_frag_skb_fwd(struct sk_buff *skb,
  33                          struct batadv_hard_iface *recv_if,
  34                          struct batadv_orig_node *orig_node_src);
  35 bool batadv_frag_skb_buffer(struct sk_buff **skb,
  36                             struct batadv_orig_node *orig_node);
  37 bool batadv_frag_send_packet(struct sk_buff *skb,
  38                              struct batadv_orig_node *orig_node,
  39                              struct batadv_neigh_node *neigh_node);
  40
  41 /**
  42  * batadv_frag_check_entry - check if a list of fragments has timed out
  43  * @frags_entry: table entry to check
  44  *
  45  * Returns true if the frags entry has timed out, false otherwise.
  46  */
  47 static inline bool
  48 batadv_frag_check_entry(struct batadv_frag_table_entry *frags_entry)
  49 {
  50         if (!hlist_empty(&frags_entry->head) &&
  51             batadv_has_timed_out(frags_entry->timestamp, BATADV_FRAG_TIMEOUT))
  52                 return true;
  53         return false;
  54 }
  55
  56 #endif /* _NET_BATMAN_ADV_FRAGMENTATION_H_ */