projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c6c8fea2 | 1 | /* |
| 64afe353 | 2 | * Copyright (C) 2010-2011 B.A.T.M.A.N. contributors: |
| c6c8fea2 SE |
3 | * |
| 4 | * Andreas Langer | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of version 2 of the GNU General Public | |
| 8 | * License as published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, but | |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | * General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
| 18 | * 02110-1301, USA | |
| 19 | * | |
| 20 | */ | |
| 21 | ||
| 22 | #ifndef _NET_BATMAN_ADV_UNICAST_H_ | |
| 23 | #define _NET_BATMAN_ADV_UNICAST_H_ | |
| 24 | ||
| ae361ce1 SE |
25 | #include "packet.h" |
| 26 | ||
| c6c8fea2 SE |
27 | #define FRAG_TIMEOUT 10000 /* purge frag list entrys after time in ms */ |
| 28 | #define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */ | |
| 29 | ||
| 30 | int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv, | |
| 31 | struct sk_buff **new_skb); | |
| 32 | void frag_list_free(struct list_head *head); | |
| 33 | int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv); | |
| 34 | int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv, | |
| 35 | struct batman_if *batman_if, uint8_t dstaddr[]); | |
| 36 | ||
| ae361ce1 SE |
37 | static inline int frag_can_reassemble(struct sk_buff *skb, int mtu) |
| 38 | { | |
| 39 | struct unicast_frag_packet *unicast_packet; | |
| 40 | int uneven_correction = 0; | |
| 41 | unsigned int merged_size; | |
| 42 | ||
| 43 | unicast_packet = (struct unicast_frag_packet *)skb->data; | |
| 44 | ||
| 45 | if (unicast_packet->flags & UNI_FRAG_LARGETAIL) { | |
| 46 | if (unicast_packet->flags & UNI_FRAG_HEAD) | |
| 47 | uneven_correction = 1; | |
| 48 | else | |
| 49 | uneven_correction = -1; | |
| 50 | } | |
| 51 | ||
| 52 | merged_size = (skb->len - sizeof(struct unicast_frag_packet)) * 2; | |
| 53 | merged_size += sizeof(struct unicast_packet) + uneven_correction; | |
| 54 | ||
| 55 | return merged_size <= mtu; | |
| 56 | } | |
| 57 | ||
| c6c8fea2 | 58 | #endif /* _NET_BATMAN_ADV_UNICAST_H_ */ |