1 /* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
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.
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.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 #ifndef _NET_BATMAN_ADV_UNICAST_H_
21 #define _NET_BATMAN_ADV_UNICAST_H_
25 #define BATADV_FRAG_TIMEOUT 10000 /* purge frag list entries after time in ms */
26 #define BATADV_FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
28 int batadv_frag_reassemble_skb(struct sk_buff
*skb
,
29 struct batadv_priv
*bat_priv
,
30 struct sk_buff
**new_skb
);
31 void batadv_frag_list_free(struct list_head
*head
);
32 int batadv_unicast_send_skb(struct sk_buff
*skb
, struct batadv_priv
*bat_priv
);
33 int batadv_frag_send_skb(struct sk_buff
*skb
, struct batadv_priv
*bat_priv
,
34 struct batadv_hard_iface
*hard_iface
,
35 const uint8_t dstaddr
[]);
37 static inline int batadv_frag_can_reassemble(const struct sk_buff
*skb
, int mtu
)
39 const struct batadv_unicast_frag_packet
*unicast_packet
;
40 int uneven_correction
= 0;
41 unsigned int merged_size
;
43 unicast_packet
= (struct batadv_unicast_frag_packet
*)skb
->data
;
45 if (unicast_packet
->flags
& BATADV_UNI_FRAG_LARGETAIL
) {
46 if (unicast_packet
->flags
& BATADV_UNI_FRAG_HEAD
)
47 uneven_correction
= 1;
49 uneven_correction
= -1;
52 merged_size
= (skb
->len
- sizeof(*unicast_packet
)) * 2;
53 merged_size
+= sizeof(struct batadv_unicast_packet
) + uneven_correction
;
55 return merged_size
<= mtu
;
58 #endif /* _NET_BATMAN_ADV_UNICAST_H_ */