59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2010-2011 B.A.T.M.A.N. contributors:
|
|
*
|
|
* Andreas Langer
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA
|
|
*
|
|
*/
|
|
|
|
#ifndef _NET_BATMAN_ADV_UNICAST_H_
|
|
#define _NET_BATMAN_ADV_UNICAST_H_
|
|
|
|
#include "packet.h"
|
|
|
|
#define FRAG_TIMEOUT 10000 /* purge frag list entrys after time in ms */
|
|
#define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
|
|
|
|
int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
|
|
struct sk_buff **new_skb);
|
|
void frag_list_free(struct list_head *head);
|
|
int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
|
|
int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
|
|
struct hard_iface *hard_iface, uint8_t dstaddr[]);
|
|
|
|
static inline int frag_can_reassemble(struct sk_buff *skb, int mtu)
|
|
{
|
|
struct unicast_frag_packet *unicast_packet;
|
|
int uneven_correction = 0;
|
|
unsigned int merged_size;
|
|
|
|
unicast_packet = (struct unicast_frag_packet *)skb->data;
|
|
|
|
if (unicast_packet->flags & UNI_FRAG_LARGETAIL) {
|
|
if (unicast_packet->flags & UNI_FRAG_HEAD)
|
|
uneven_correction = 1;
|
|
else
|
|
uneven_correction = -1;
|
|
}
|
|
|
|
merged_size = (skb->len - sizeof(struct unicast_frag_packet)) * 2;
|
|
merged_size += sizeof(struct unicast_packet) + uneven_correction;
|
|
|
|
return merged_size <= mtu;
|
|
}
|
|
|
|
#endif /* _NET_BATMAN_ADV_UNICAST_H_ */
|