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/*
* Copyright (C) 2010 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
*
*/
#include "main.h"
#include "unicast.h"
#include "send.h"
#include "soft-interface.h"
#include "hash.h"
#include "translation-table.h"
#include "routing.h"
#include "hard-interface.h"
int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct unicast_packet *unicast_packet;
struct orig_node *orig_node;
struct batman_if *batman_if;
struct neigh_node *router;
uint8_t dstaddr[6];
unsigned long flags;
spin_lock_irqsave(&orig_hash_lock, flags);
/* get routing information */
orig_node = ((struct orig_node *)hash_find(orig_hash, ethhdr->h_dest));
/* check for hna host */
if (!orig_node)
orig_node = transtable_search(ethhdr->h_dest);
router = find_router(orig_node, NULL);
if (!router)
goto unlock;
/* don't lock while sending the packets ... we therefore
* copy the required data before sending */
batman_if = router->if_incoming;
memcpy(dstaddr, router->addr, ETH_ALEN);
spin_unlock_irqrestore(&orig_hash_lock, flags);
if (batman_if->if_status != IF_ACTIVE)
goto dropped;
if (my_skb_push(skb, sizeof(struct unicast_packet)) < 0)
goto dropped;
unicast_packet = (struct unicast_packet *)skb->data;
unicast_packet->version = COMPAT_VERSION;
/* batman packet type: unicast */
unicast_packet->packet_type = BAT_UNICAST;
/* set unicast ttl */
unicast_packet->ttl = TTL;
/* copy the destination for faster routing */
memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
send_skb_packet(skb, batman_if, dstaddr);
return 0;
unlock:
spin_unlock_irqrestore(&orig_hash_lock, flags);
dropped:
kfree_skb(skb);
return 1;
}
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