linux/net/batman-adv/unicast.h
Sven Eckelmann 704509b8d4 batman-adv: Calculate sizeof using variable insead of types
Documentation/CodingStyle recommends to use the form

	p = kmalloc(sizeof(*p), ...);

to calculate the size of a struct and not the version where the struct
name is spelled out to prevent bugs when the type of p changes. This
also seems appropriate for manipulation of buffers when they are
directly associated with p.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-05-30 07:39:33 +02:00

58 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, 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_ */