linux/net/batman-adv/unicast.h
Sven Eckelmann 88ed1e7772 batman-adv: Prefix unicast non-static functions with batadv_
batman-adv can be compiled as part of the kernel instead of an module. In that
case the linker will see all non-static symbols of batman-adv and all other
non-static symbols of the kernel. This could lead to symbol collisions. A
prefix for the batman-adv symbols that defines their private namespace avoids
such a problem.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
2012-06-20 22:15:30 +02:00

60 lines
1.9 KiB
C

/*
* Copyright (C) 2010-2012 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 entries after time in ms */
#define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
int batadv_frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
struct sk_buff **new_skb);
void batadv_frag_list_free(struct list_head *head);
int batadv_unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
int batadv_frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
struct hard_iface *hard_iface,
const uint8_t dstaddr[]);
static inline int frag_can_reassemble(const struct sk_buff *skb, int mtu)
{
const 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(*unicast_packet)) * 2;
merged_size += sizeof(struct unicast_packet) + uneven_correction;
return merged_size <= mtu;
}
#endif /* _NET_BATMAN_ADV_UNICAST_H_ */