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 FRAG_TIMEOUT 10000 /* purge frag list entries after time in ms */
26 #define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
28 int batadv_frag_reassemble_skb(struct sk_buff
*skb
, struct bat_priv
*bat_priv
,
29 struct sk_buff
**new_skb
);
30 void batadv_frag_list_free(struct list_head
*head
);
31 int batadv_unicast_send_skb(struct sk_buff
*skb
, struct bat_priv
*bat_priv
);
32 int batadv_frag_send_skb(struct sk_buff
*skb
, struct bat_priv
*bat_priv
,
33 struct hard_iface
*hard_iface
,
34 const uint8_t dstaddr
[]);
36 static inline int frag_can_reassemble(const struct sk_buff
*skb
, int mtu
)
38 const struct unicast_frag_packet
*unicast_packet
;
39 int uneven_correction
= 0;
40 unsigned int merged_size
;
42 unicast_packet
= (struct unicast_frag_packet
*)skb
->data
;
44 if (unicast_packet
->flags
& UNI_FRAG_LARGETAIL
) {
45 if (unicast_packet
->flags
& UNI_FRAG_HEAD
)
46 uneven_correction
= 1;
48 uneven_correction
= -1;
51 merged_size
= (skb
->len
- sizeof(*unicast_packet
)) * 2;
52 merged_size
+= sizeof(struct unicast_packet
) + uneven_correction
;
54 return merged_size
<= mtu
;
57 #endif /* _NET_BATMAN_ADV_UNICAST_H_ */
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