projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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_ */ |