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9cfc7bd6 | 1 | /* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Andreas Langer | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
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 | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #ifndef _NET_BATMAN_ADV_UNICAST_H_ | |
21 | #define _NET_BATMAN_ADV_UNICAST_H_ | |
22 | ||
ae361ce1 SE |
23 | #include "packet.h" |
24 | ||
4d5d2db8 SE |
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 */ | |
c6c8fea2 | 27 | |
56303d34 SE |
28 | int batadv_frag_reassemble_skb(struct sk_buff *skb, |
29 | struct batadv_priv *bat_priv, | |
88ed1e77 SE |
30 | struct sk_buff **new_skb); |
31 | void batadv_frag_list_free(struct list_head *head); | |
56303d34 SE |
32 | int batadv_frag_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv, |
33 | struct batadv_hard_iface *hard_iface, | |
88ed1e77 | 34 | const uint8_t dstaddr[]); |
785ea114 AQ |
35 | bool batadv_unicast_4addr_prepare_skb(struct batadv_priv *bat_priv, |
36 | struct sk_buff *skb, | |
37 | struct batadv_orig_node *orig_node, | |
38 | int packet_subtype); | |
7cdcf6dd AQ |
39 | int batadv_unicast_generic_send_skb(struct batadv_priv *bat_priv, |
40 | struct sk_buff *skb, int packet_type, | |
41 | int packet_subtype); | |
42 | ||
43 | ||
44 | /** | |
45 | * batadv_unicast_send_skb - send the skb encapsulated in a unicast packet | |
46 | * @bat_priv: the bat priv with all the soft interface information | |
47 | * @skb: the payload to send | |
48 | */ | |
49 | static inline int batadv_unicast_send_skb(struct batadv_priv *bat_priv, | |
50 | struct sk_buff *skb) | |
51 | { | |
52 | return batadv_unicast_generic_send_skb(bat_priv, skb, BATADV_UNICAST, | |
53 | 0); | |
54 | } | |
55 | ||
56 | /** | |
57 | * batadv_unicast_send_skb - send the skb encapsulated in a unicast4addr packet | |
58 | * @bat_priv: the bat priv with all the soft interface information | |
59 | * @skb: the payload to send | |
60 | * @packet_subtype: the batman 4addr packet subtype to use | |
61 | */ | |
62 | static inline int batadv_unicast_4addr_send_skb(struct batadv_priv *bat_priv, | |
63 | struct sk_buff *skb, | |
64 | int packet_subtype) | |
65 | { | |
66 | return batadv_unicast_generic_send_skb(bat_priv, skb, | |
67 | BATADV_UNICAST_4ADDR, | |
68 | packet_subtype); | |
69 | } | |
c6c8fea2 | 70 | |
f0530ee5 | 71 | static inline int batadv_frag_can_reassemble(const struct sk_buff *skb, int mtu) |
ae361ce1 | 72 | { |
96412690 | 73 | const struct batadv_unicast_frag_packet *unicast_packet; |
ae361ce1 SE |
74 | int uneven_correction = 0; |
75 | unsigned int merged_size; | |
76 | ||
96412690 | 77 | unicast_packet = (struct batadv_unicast_frag_packet *)skb->data; |
ae361ce1 | 78 | |
acd34afa SE |
79 | if (unicast_packet->flags & BATADV_UNI_FRAG_LARGETAIL) { |
80 | if (unicast_packet->flags & BATADV_UNI_FRAG_HEAD) | |
ae361ce1 SE |
81 | uneven_correction = 1; |
82 | else | |
83 | uneven_correction = -1; | |
84 | } | |
85 | ||
704509b8 | 86 | merged_size = (skb->len - sizeof(*unicast_packet)) * 2; |
96412690 | 87 | merged_size += sizeof(struct batadv_unicast_packet) + uneven_correction; |
ae361ce1 SE |
88 | |
89 | return merged_size <= mtu; | |
90 | } | |
91 | ||
c6c8fea2 | 92 | #endif /* _NET_BATMAN_ADV_UNICAST_H_ */ |