| /* |
| * Copyright (C) 2010-2012 B.A.T.M.A.N. contributors: |
| * |
| * Andreas Langer |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA |
| * |
| */ |
| |
| #ifndef _NET_BATMAN_ADV_UNICAST_H_ |
| #define _NET_BATMAN_ADV_UNICAST_H_ |
| |
| #include "packet.h" |
| |
| #define FRAG_TIMEOUT 10000 /* purge frag list entries after time in ms */ |
| #define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */ |
| |
| int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv, |
| struct sk_buff **new_skb); |
| void frag_list_free(struct list_head *head); |
| int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv); |
| int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv, |
| struct hard_iface *hard_iface, const uint8_t dstaddr[]); |
| |
| static inline int frag_can_reassemble(const struct sk_buff *skb, int mtu) |
| { |
| const struct unicast_frag_packet *unicast_packet; |
| int uneven_correction = 0; |
| unsigned int merged_size; |
| |
| unicast_packet = (struct unicast_frag_packet *)skb->data; |
| |
| if (unicast_packet->flags & UNI_FRAG_LARGETAIL) { |
| if (unicast_packet->flags & UNI_FRAG_HEAD) |
| uneven_correction = 1; |
| else |
| uneven_correction = -1; |
| } |
| |
| merged_size = (skb->len - sizeof(*unicast_packet)) * 2; |
| merged_size += sizeof(struct unicast_packet) + uneven_correction; |
| |
| return merged_size <= mtu; |
| } |
| |
| #endif /* _NET_BATMAN_ADV_UNICAST_H_ */ |