net/batman-adv/aggregation.h

   1 /*
   2  * Copyright (C) 2007-2011 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, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA
  19  *
  20  */
  21
  22 #ifndef _NET_BATMAN_ADV_AGGREGATION_H_
  23 #define _NET_BATMAN_ADV_AGGREGATION_H_
  24
  25 #include "main.h"
  26
  27 /* is there another aggregated packet here? */
  28 static inline int aggregated_packet(int buff_pos, int packet_len,
  29                                     int tt_num_changes)
  30 {
  31         int next_buff_pos = buff_pos + BAT_PACKET_LEN + (tt_num_changes *
  32                                                 sizeof(struct tt_change));
  33
  34         return (next_buff_pos <= packet_len) &&
  35                 (next_buff_pos <= MAX_AGGREGATION_BYTES);
  36 }
  37
  38 void add_bat_packet_to_list(struct bat_priv *bat_priv,
  39                             unsigned char *packet_buff, int packet_len,
  40                             struct hard_iface *if_incoming, int own_packet,
  41                             unsigned long send_time);
  42 void receive_aggr_bat_packet(const struct ethhdr *ethhdr,
  43                              unsigned char *packet_buff, int packet_len,
  44                              struct hard_iface *if_incoming);
  45
  46 #endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */