2011-08-25 09:34:42 +07:00
|
|
|
/*
|
|
|
|
* Copyright 2011, Siemens AG
|
|
|
|
* written by Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Based on patches from Jon Smirl <jonsmirl@gmail.com>
|
|
|
|
* Copyright (c) 2011 Jon Smirl <jonsmirl@gmail.com>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Jon's code is based on 6lowpan implementation for Contiki which is:
|
|
|
|
* Copyright (c) 2008, Swedish Institute of Computer Science.
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
* are met:
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
|
|
* may be used to endorse or promote products derived from this software
|
|
|
|
* without specific prior written permission.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
* SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
#include <linux/if_arp.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/moduleparam.h>
|
|
|
|
#include <linux/netdevice.h>
|
|
|
|
#include <net/af_ieee802154.h>
|
|
|
|
#include <net/ieee802154.h>
|
|
|
|
#include <net/ieee802154_netdev.h>
|
|
|
|
#include <net/ipv6.h>
|
|
|
|
|
|
|
|
#include "6lowpan.h"
|
|
|
|
|
|
|
|
static LIST_HEAD(lowpan_devices);
|
|
|
|
|
|
|
|
/* private device info */
|
|
|
|
struct lowpan_dev_info {
|
|
|
|
struct net_device *real_dev; /* real WPAN device ptr */
|
|
|
|
struct mutex dev_list_mtx; /* mutex for list ops */
|
2013-03-27 01:09:24 +07:00
|
|
|
unsigned short fragment_tag;
|
2011-08-25 09:34:42 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
struct lowpan_dev_record {
|
|
|
|
struct net_device *ldev;
|
|
|
|
struct list_head list;
|
|
|
|
};
|
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
struct lowpan_fragment {
|
|
|
|
struct sk_buff *skb; /* skb to be assembled */
|
|
|
|
u16 length; /* length to be assemled */
|
|
|
|
u32 bytes_rcv; /* bytes received */
|
|
|
|
u16 tag; /* current fragment tag */
|
|
|
|
struct timer_list timer; /* assembling timer */
|
|
|
|
struct list_head list; /* fragments list */
|
|
|
|
};
|
|
|
|
|
|
|
|
static LIST_HEAD(lowpan_fragments);
|
2012-07-11 04:22:42 +07:00
|
|
|
static DEFINE_SPINLOCK(flist_lock);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
static inline struct
|
|
|
|
lowpan_dev_info *lowpan_dev_info(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
return netdev_priv(dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void lowpan_address_flip(u8 *src, u8 *dest)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
for (i = 0; i < IEEE802154_ADDR_LEN; i++)
|
|
|
|
(dest)[IEEE802154_ADDR_LEN - i - 1] = (src)[i];
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lowpan_header_create(struct sk_buff *skb,
|
|
|
|
struct net_device *dev,
|
|
|
|
unsigned short type, const void *_daddr,
|
2012-04-15 12:58:06 +07:00
|
|
|
const void *_saddr, unsigned int len)
|
2011-08-25 09:34:42 +07:00
|
|
|
{
|
|
|
|
struct ipv6hdr *hdr;
|
|
|
|
const u8 *saddr = _saddr;
|
|
|
|
const u8 *daddr = _daddr;
|
|
|
|
struct ieee802154_addr sa, da;
|
|
|
|
|
2013-02-05 17:23:43 +07:00
|
|
|
/* TODO:
|
|
|
|
* if this package isn't ipv6 one, where should it be routed?
|
|
|
|
*/
|
2011-08-25 09:34:42 +07:00
|
|
|
if (type != ETH_P_IPV6)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
hdr = ipv6_hdr(skb);
|
|
|
|
|
|
|
|
if (!saddr)
|
|
|
|
saddr = dev->dev_addr;
|
|
|
|
|
2013-12-13 02:15:25 +07:00
|
|
|
raw_dump_inline(__func__, "saddr", (unsigned char *)saddr, 8);
|
|
|
|
raw_dump_inline(__func__, "daddr", (unsigned char *)daddr, 8);
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
lowpan_header_compress(skb, dev, type, daddr, saddr, len);
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* NOTE1: I'm still unsure about the fact that compression and WPAN
|
|
|
|
* header are created here and not later in the xmit. So wait for
|
|
|
|
* an opinion of net maintainers.
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
* NOTE2: to be absolutely correct, we must derive PANid information
|
|
|
|
* from MAC subif of the 'dev' and 'real_dev' network devices, but
|
|
|
|
* this isn't implemented in mainline yet, so currently we assign 0xff
|
|
|
|
*/
|
2013-12-11 22:05:34 +07:00
|
|
|
mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
|
|
|
|
mac_cb(skb)->seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
|
2013-03-26 00:59:25 +07:00
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
/* prepare wpan address data */
|
|
|
|
sa.addr_type = IEEE802154_ADDR_LONG;
|
|
|
|
sa.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
|
2013-03-26 00:59:31 +07:00
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
memcpy(&(sa.hwaddr), saddr, 8);
|
|
|
|
/* intra-PAN communications */
|
|
|
|
da.pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
/*
|
|
|
|
* if the destination address is the broadcast address, use the
|
|
|
|
* corresponding short address
|
|
|
|
*/
|
|
|
|
if (lowpan_is_addr_broadcast(daddr)) {
|
|
|
|
da.addr_type = IEEE802154_ADDR_SHORT;
|
|
|
|
da.short_addr = IEEE802154_ADDR_BROADCAST;
|
|
|
|
} else {
|
|
|
|
da.addr_type = IEEE802154_ADDR_LONG;
|
|
|
|
memcpy(&(da.hwaddr), daddr, IEEE802154_ADDR_LEN);
|
2013-03-26 00:59:23 +07:00
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
/* request acknowledgment */
|
|
|
|
mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ;
|
2011-08-25 09:34:42 +07:00
|
|
|
}
|
2013-12-11 22:05:34 +07:00
|
|
|
|
|
|
|
return dev_hard_header(skb, lowpan_dev_info(dev)->real_dev,
|
|
|
|
type, (void *)&da, (void *)&sa, skb->len);
|
2011-08-25 09:34:42 +07:00
|
|
|
}
|
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
static int lowpan_give_skb_to_devices(struct sk_buff *skb,
|
|
|
|
struct net_device *dev)
|
2013-01-17 02:09:47 +07:00
|
|
|
{
|
|
|
|
struct lowpan_dev_record *entry;
|
|
|
|
struct sk_buff *skb_cp;
|
|
|
|
int stat = NET_RX_SUCCESS;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(entry, &lowpan_devices, list)
|
|
|
|
if (lowpan_dev_info(entry->ldev)->real_dev == skb->dev) {
|
|
|
|
skb_cp = skb_copy(skb, GFP_ATOMIC);
|
|
|
|
if (!skb_cp) {
|
|
|
|
stat = -ENOMEM;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_cp->dev = entry->ldev;
|
|
|
|
stat = netif_rx(skb_cp);
|
|
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
return stat;
|
|
|
|
}
|
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
static void lowpan_fragment_timer_expired(unsigned long entry_addr)
|
|
|
|
{
|
|
|
|
struct lowpan_fragment *entry = (struct lowpan_fragment *)entry_addr;
|
|
|
|
|
2012-06-25 10:49:03 +07:00
|
|
|
pr_debug("timer expired for frame with tag %d\n", entry->tag);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
list_del(&entry->list);
|
|
|
|
dev_kfree_skb(entry->skb);
|
|
|
|
kfree(entry);
|
|
|
|
}
|
|
|
|
|
2012-04-26 06:35:50 +07:00
|
|
|
static struct lowpan_fragment *
|
2013-03-26 00:59:26 +07:00
|
|
|
lowpan_alloc_new_frame(struct sk_buff *skb, u16 len, u16 tag)
|
2012-04-26 06:35:50 +07:00
|
|
|
{
|
|
|
|
struct lowpan_fragment *frame;
|
|
|
|
|
|
|
|
frame = kzalloc(sizeof(struct lowpan_fragment),
|
|
|
|
GFP_ATOMIC);
|
|
|
|
if (!frame)
|
|
|
|
goto frame_err;
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&frame->list);
|
|
|
|
|
2012-07-11 13:51:16 +07:00
|
|
|
frame->length = len;
|
2012-04-26 06:35:50 +07:00
|
|
|
frame->tag = tag;
|
|
|
|
|
|
|
|
/* allocate buffer for frame assembling */
|
2012-07-11 04:22:45 +07:00
|
|
|
frame->skb = netdev_alloc_skb_ip_align(skb->dev, frame->length +
|
|
|
|
sizeof(struct ipv6hdr));
|
2012-04-26 06:35:50 +07:00
|
|
|
|
|
|
|
if (!frame->skb)
|
|
|
|
goto skb_err;
|
|
|
|
|
|
|
|
frame->skb->priority = skb->priority;
|
|
|
|
|
|
|
|
/* reserve headroom for uncompressed ipv6 header */
|
|
|
|
skb_reserve(frame->skb, sizeof(struct ipv6hdr));
|
|
|
|
skb_put(frame->skb, frame->length);
|
|
|
|
|
2013-08-17 02:59:55 +07:00
|
|
|
/* copy the first control block to keep a
|
|
|
|
* trace of the link-layer addresses in case
|
|
|
|
* of a link-local compressed address
|
|
|
|
*/
|
|
|
|
memcpy(frame->skb->cb, skb->cb, sizeof(skb->cb));
|
|
|
|
|
2012-04-26 06:35:50 +07:00
|
|
|
init_timer(&frame->timer);
|
|
|
|
/* time out is the same as for ipv6 - 60 sec */
|
|
|
|
frame->timer.expires = jiffies + LOWPAN_FRAG_TIMEOUT;
|
|
|
|
frame->timer.data = (unsigned long)frame;
|
|
|
|
frame->timer.function = lowpan_fragment_timer_expired;
|
|
|
|
|
|
|
|
add_timer(&frame->timer);
|
|
|
|
|
|
|
|
list_add_tail(&frame->list, &lowpan_fragments);
|
|
|
|
|
|
|
|
return frame;
|
|
|
|
|
|
|
|
skb_err:
|
|
|
|
kfree(frame);
|
|
|
|
frame_err:
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
static int process_data(struct sk_buff *skb)
|
2011-08-25 09:34:42 +07:00
|
|
|
{
|
2013-12-11 22:05:34 +07:00
|
|
|
u8 iphc0, iphc1;
|
2013-08-17 02:59:58 +07:00
|
|
|
const struct ieee802154_addr *_saddr, *_daddr;
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2013-12-13 02:15:25 +07:00
|
|
|
raw_dump_table(__func__, "raw skb data dump", skb->data, skb->len);
|
2011-08-25 09:34:42 +07:00
|
|
|
/* at least two bytes will be used for the encoding */
|
|
|
|
if (skb->len < 2)
|
|
|
|
goto drop;
|
2012-06-25 10:49:01 +07:00
|
|
|
|
|
|
|
if (lowpan_fetch_skb_u8(skb, &iphc0))
|
|
|
|
goto drop;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
/* fragments assembling */
|
|
|
|
switch (iphc0 & LOWPAN_DISPATCH_MASK) {
|
|
|
|
case LOWPAN_DISPATCH_FRAG1:
|
|
|
|
case LOWPAN_DISPATCH_FRAGN:
|
|
|
|
{
|
|
|
|
struct lowpan_fragment *frame;
|
2012-07-11 13:51:16 +07:00
|
|
|
/* slen stores the rightmost 8 bits of the 11 bits length */
|
2013-03-26 00:59:26 +07:00
|
|
|
u8 slen, offset = 0;
|
2012-07-11 13:51:16 +07:00
|
|
|
u16 len, tag;
|
2011-11-10 14:38:38 +07:00
|
|
|
bool found = false;
|
|
|
|
|
2012-07-11 13:51:16 +07:00
|
|
|
if (lowpan_fetch_skb_u8(skb, &slen) || /* frame length */
|
2012-06-25 10:49:01 +07:00
|
|
|
lowpan_fetch_skb_u16(skb, &tag)) /* fragment tag */
|
|
|
|
goto drop;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2012-07-11 13:51:16 +07:00
|
|
|
/* adds the 3 MSB to the 8 LSB to retrieve the 11 bits length */
|
|
|
|
len = ((iphc0 & 7) << 8) | slen;
|
|
|
|
|
2013-03-26 00:59:27 +07:00
|
|
|
if ((iphc0 & LOWPAN_DISPATCH_MASK) == LOWPAN_DISPATCH_FRAG1) {
|
|
|
|
pr_debug("%s received a FRAG1 packet (tag: %d, "
|
|
|
|
"size of the entire IP packet: %d)",
|
|
|
|
__func__, tag, len);
|
|
|
|
} else { /* FRAGN */
|
2013-03-26 00:59:26 +07:00
|
|
|
if (lowpan_fetch_skb_u8(skb, &offset))
|
|
|
|
goto unlock_and_drop;
|
2013-03-26 00:59:27 +07:00
|
|
|
pr_debug("%s received a FRAGN packet (tag: %d, "
|
|
|
|
"size of the entire IP packet: %d, "
|
|
|
|
"offset: %d)", __func__, tag, len, offset * 8);
|
2013-03-26 00:59:26 +07:00
|
|
|
}
|
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
/*
|
|
|
|
* check if frame assembling with the same tag is
|
|
|
|
* already in progress
|
|
|
|
*/
|
2012-07-11 04:22:48 +07:00
|
|
|
spin_lock_bh(&flist_lock);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
list_for_each_entry(frame, &lowpan_fragments, list)
|
|
|
|
if (frame->tag == tag) {
|
|
|
|
found = true;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* alloc new frame structure */
|
|
|
|
if (!found) {
|
2013-03-26 00:59:27 +07:00
|
|
|
pr_debug("%s first fragment received for tag %d, "
|
|
|
|
"begin packet reassembly", __func__, tag);
|
2012-07-11 13:51:16 +07:00
|
|
|
frame = lowpan_alloc_new_frame(skb, len, tag);
|
2011-11-10 14:38:38 +07:00
|
|
|
if (!frame)
|
|
|
|
goto unlock_and_drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* if payload fits buffer, copy it */
|
|
|
|
if (likely((offset * 8 + skb->len) <= frame->length))
|
|
|
|
skb_copy_to_linear_data_offset(frame->skb, offset * 8,
|
|
|
|
skb->data, skb->len);
|
|
|
|
else
|
|
|
|
goto unlock_and_drop;
|
|
|
|
|
|
|
|
frame->bytes_rcv += skb->len;
|
|
|
|
|
|
|
|
/* frame assembling complete */
|
|
|
|
if ((frame->bytes_rcv == frame->length) &&
|
|
|
|
frame->timer.expires > jiffies) {
|
|
|
|
/* if timer haven't expired - first of all delete it */
|
2012-07-11 04:22:48 +07:00
|
|
|
del_timer_sync(&frame->timer);
|
2011-11-10 14:38:38 +07:00
|
|
|
list_del(&frame->list);
|
2012-07-11 04:22:48 +07:00
|
|
|
spin_unlock_bh(&flist_lock);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-03-26 00:59:27 +07:00
|
|
|
pr_debug("%s successfully reassembled fragment "
|
|
|
|
"(tag %d)", __func__, tag);
|
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
skb = frame->skb;
|
|
|
|
kfree(frame);
|
2012-06-25 10:49:01 +07:00
|
|
|
|
|
|
|
if (lowpan_fetch_skb_u8(skb, &iphc0))
|
2012-06-27 03:53:09 +07:00
|
|
|
goto drop;
|
2012-06-25 10:49:01 +07:00
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
break;
|
|
|
|
}
|
2012-07-11 04:22:48 +07:00
|
|
|
spin_unlock_bh(&flist_lock);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
return kfree_skb(skb), 0;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2012-06-25 10:49:01 +07:00
|
|
|
if (lowpan_fetch_skb_u8(skb, &iphc1))
|
|
|
|
goto drop;
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2013-08-17 02:59:58 +07:00
|
|
|
_saddr = &mac_cb(skb)->sa;
|
|
|
|
_daddr = &mac_cb(skb)->da;
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
return lowpan_process_data(skb, skb->dev, (u8 *)_saddr->hwaddr,
|
|
|
|
_saddr->addr_type, IEEE802154_ADDR_LEN,
|
|
|
|
(u8 *)_daddr->hwaddr, _daddr->addr_type,
|
|
|
|
IEEE802154_ADDR_LEN, iphc0, iphc1,
|
|
|
|
lowpan_give_skb_to_devices);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
unlock_and_drop:
|
2012-07-11 04:22:48 +07:00
|
|
|
spin_unlock_bh(&flist_lock);
|
2011-08-25 09:34:42 +07:00
|
|
|
drop:
|
2011-08-30 10:45:52 +07:00
|
|
|
kfree_skb(skb);
|
2011-08-25 09:34:42 +07:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2012-07-02 02:58:46 +07:00
|
|
|
static int lowpan_set_address(struct net_device *dev, void *p)
|
|
|
|
{
|
|
|
|
struct sockaddr *sa = p;
|
|
|
|
|
|
|
|
if (netif_running(dev))
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
/* TODO: validate addr */
|
|
|
|
memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
static int
|
|
|
|
lowpan_fragment_xmit(struct sk_buff *skb, u8 *head,
|
2013-03-26 00:59:26 +07:00
|
|
|
int mlen, int plen, int offset, int type)
|
2011-11-10 14:38:38 +07:00
|
|
|
{
|
|
|
|
struct sk_buff *frag;
|
2013-10-28 16:24:16 +07:00
|
|
|
int hlen;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-03-26 00:59:26 +07:00
|
|
|
hlen = (type == LOWPAN_DISPATCH_FRAG1) ?
|
|
|
|
LOWPAN_FRAG1_HEAD_SIZE : LOWPAN_FRAGN_HEAD_SIZE;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-12-13 02:15:25 +07:00
|
|
|
raw_dump_inline(__func__, "6lowpan fragment header", head, hlen);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-10-28 16:24:18 +07:00
|
|
|
frag = netdev_alloc_skb(skb->dev,
|
|
|
|
hlen + mlen + plen + IEEE802154_MFR_SIZE);
|
2011-11-10 14:38:38 +07:00
|
|
|
if (!frag)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
frag->priority = skb->priority;
|
|
|
|
|
|
|
|
/* copy header, MFR and payload */
|
2013-10-30 15:18:24 +07:00
|
|
|
skb_put(frag, mlen);
|
|
|
|
skb_copy_to_linear_data(frag, skb_mac_header(skb), mlen);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-10-30 15:18:24 +07:00
|
|
|
skb_put(frag, hlen);
|
|
|
|
skb_copy_to_linear_data_offset(frag, mlen, head, hlen);
|
|
|
|
|
|
|
|
skb_put(frag, plen);
|
|
|
|
skb_copy_to_linear_data_offset(frag, mlen + hlen,
|
|
|
|
skb_network_header(skb) + offset, plen);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-12-13 02:15:25 +07:00
|
|
|
raw_dump_table(__func__, " raw fragment dump", frag->data, frag->len);
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-10-28 16:24:16 +07:00
|
|
|
return dev_queue_xmit(frag);
|
2011-11-10 14:38:38 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2013-03-26 00:59:28 +07:00
|
|
|
lowpan_skb_fragmentation(struct sk_buff *skb, struct net_device *dev)
|
2011-11-10 14:38:38 +07:00
|
|
|
{
|
|
|
|
int err, header_length, payload_length, tag, offset = 0;
|
|
|
|
u8 head[5];
|
|
|
|
|
2013-10-30 15:18:22 +07:00
|
|
|
header_length = skb->mac_len;
|
2011-11-10 14:38:38 +07:00
|
|
|
payload_length = skb->len - header_length;
|
2013-03-26 00:59:28 +07:00
|
|
|
tag = lowpan_dev_info(dev)->fragment_tag++;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
/* first fragment header */
|
2012-07-11 13:51:16 +07:00
|
|
|
head[0] = LOWPAN_DISPATCH_FRAG1 | ((payload_length >> 8) & 0x7);
|
|
|
|
head[1] = payload_length & 0xff;
|
2012-07-11 13:51:15 +07:00
|
|
|
head[2] = tag >> 8;
|
|
|
|
head[3] = tag & 0xff;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
2013-03-26 00:59:26 +07:00
|
|
|
err = lowpan_fragment_xmit(skb, head, header_length, LOWPAN_FRAG_SIZE,
|
|
|
|
0, LOWPAN_DISPATCH_FRAG1);
|
|
|
|
|
2013-03-26 00:59:27 +07:00
|
|
|
if (err) {
|
|
|
|
pr_debug("%s unable to send FRAG1 packet (tag: %d)",
|
|
|
|
__func__, tag);
|
2013-03-26 00:59:26 +07:00
|
|
|
goto exit;
|
2013-03-26 00:59:27 +07:00
|
|
|
}
|
2013-03-26 00:59:26 +07:00
|
|
|
|
|
|
|
offset = LOWPAN_FRAG_SIZE;
|
2011-11-10 14:38:38 +07:00
|
|
|
|
|
|
|
/* next fragment header */
|
|
|
|
head[0] &= ~LOWPAN_DISPATCH_FRAG1;
|
|
|
|
head[0] |= LOWPAN_DISPATCH_FRAGN;
|
|
|
|
|
2013-10-28 16:24:17 +07:00
|
|
|
while (payload_length - offset > 0) {
|
2011-11-10 14:38:38 +07:00
|
|
|
int len = LOWPAN_FRAG_SIZE;
|
|
|
|
|
|
|
|
head[4] = offset / 8;
|
|
|
|
|
|
|
|
if (payload_length - offset < len)
|
|
|
|
len = payload_length - offset;
|
|
|
|
|
|
|
|
err = lowpan_fragment_xmit(skb, head, header_length,
|
2013-03-26 00:59:26 +07:00
|
|
|
len, offset, LOWPAN_DISPATCH_FRAGN);
|
2013-03-26 00:59:27 +07:00
|
|
|
if (err) {
|
|
|
|
pr_debug("%s unable to send a subsequent FRAGN packet "
|
|
|
|
"(tag: %d, offset: %d", __func__, tag, offset);
|
2013-03-26 00:59:26 +07:00
|
|
|
goto exit;
|
2013-03-26 00:59:27 +07:00
|
|
|
}
|
2013-03-26 00:59:26 +07:00
|
|
|
|
2011-11-10 14:38:38 +07:00
|
|
|
offset += len;
|
|
|
|
}
|
|
|
|
|
2013-03-26 00:59:26 +07:00
|
|
|
exit:
|
2011-11-10 14:38:38 +07:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
static netdev_tx_t lowpan_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
|
|
{
|
2011-11-10 14:38:38 +07:00
|
|
|
int err = -1;
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2012-06-25 10:49:03 +07:00
|
|
|
pr_debug("package xmit\n");
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
skb->dev = lowpan_dev_info(dev)->real_dev;
|
|
|
|
if (skb->dev == NULL) {
|
2012-06-25 10:49:03 +07:00
|
|
|
pr_debug("ERROR: no real wpan device found\n");
|
2011-11-10 14:38:38 +07:00
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
2012-11-29 22:55:44 +07:00
|
|
|
/* Send directly if less than the MTU minus the 2 checksum bytes. */
|
|
|
|
if (skb->len <= IEEE802154_MTU - IEEE802154_MFR_SIZE) {
|
2011-08-25 09:34:42 +07:00
|
|
|
err = dev_queue_xmit(skb);
|
2011-11-10 14:38:38 +07:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2012-06-25 10:49:03 +07:00
|
|
|
pr_debug("frame is too big, fragmentation is needed\n");
|
2013-03-26 00:59:28 +07:00
|
|
|
err = lowpan_skb_fragmentation(skb, dev);
|
2011-11-10 14:38:38 +07:00
|
|
|
error:
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
out:
|
2013-04-03 11:00:58 +07:00
|
|
|
if (err)
|
2012-06-25 10:49:03 +07:00
|
|
|
pr_debug("ERROR: xmit failed\n");
|
2011-08-25 09:34:42 +07:00
|
|
|
|
2013-04-03 11:00:58 +07:00
|
|
|
return (err < 0) ? NET_XMIT_DROP : err;
|
2011-08-25 09:34:42 +07:00
|
|
|
}
|
|
|
|
|
2012-04-26 06:24:56 +07:00
|
|
|
static struct wpan_phy *lowpan_get_phy(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
|
|
|
|
return ieee802154_mlme_ops(real_dev)->get_phy(real_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static u16 lowpan_get_pan_id(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
|
|
|
|
return ieee802154_mlme_ops(real_dev)->get_pan_id(real_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static u16 lowpan_get_short_addr(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
|
|
|
|
return ieee802154_mlme_ops(real_dev)->get_short_addr(real_dev);
|
|
|
|
}
|
|
|
|
|
2013-03-26 00:59:30 +07:00
|
|
|
static u8 lowpan_get_dsn(const struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
|
|
|
|
return ieee802154_mlme_ops(real_dev)->get_dsn(real_dev);
|
|
|
|
}
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
static struct header_ops lowpan_header_ops = {
|
|
|
|
.create = lowpan_header_create,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct net_device_ops lowpan_netdev_ops = {
|
|
|
|
.ndo_start_xmit = lowpan_xmit,
|
2012-07-02 02:58:46 +07:00
|
|
|
.ndo_set_mac_address = lowpan_set_address,
|
2011-08-25 09:34:42 +07:00
|
|
|
};
|
|
|
|
|
2012-04-26 06:24:56 +07:00
|
|
|
static struct ieee802154_mlme_ops lowpan_mlme = {
|
|
|
|
.get_pan_id = lowpan_get_pan_id,
|
|
|
|
.get_phy = lowpan_get_phy,
|
|
|
|
.get_short_addr = lowpan_get_short_addr,
|
2013-03-26 00:59:30 +07:00
|
|
|
.get_dsn = lowpan_get_dsn,
|
2012-04-26 06:24:56 +07:00
|
|
|
};
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
static void lowpan_setup(struct net_device *dev)
|
|
|
|
{
|
|
|
|
dev->addr_len = IEEE802154_ADDR_LEN;
|
|
|
|
memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
|
|
|
|
dev->type = ARPHRD_IEEE802154;
|
|
|
|
/* Frame Control + Sequence Number + Address fields + Security Header */
|
|
|
|
dev->hard_header_len = 2 + 1 + 20 + 14;
|
|
|
|
dev->needed_tailroom = 2; /* FCS */
|
|
|
|
dev->mtu = 1281;
|
|
|
|
dev->tx_queue_len = 0;
|
2011-11-10 14:39:37 +07:00
|
|
|
dev->flags = IFF_BROADCAST | IFF_MULTICAST;
|
2011-08-25 09:34:42 +07:00
|
|
|
dev->watchdog_timeo = 0;
|
|
|
|
|
|
|
|
dev->netdev_ops = &lowpan_netdev_ops;
|
|
|
|
dev->header_ops = &lowpan_header_ops;
|
2012-04-26 06:24:56 +07:00
|
|
|
dev->ml_priv = &lowpan_mlme;
|
2012-09-01 12:57:07 +07:00
|
|
|
dev->destructor = free_netdev;
|
2011-08-25 09:34:42 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
|
|
|
|
{
|
|
|
|
if (tb[IFLA_ADDRESS]) {
|
|
|
|
if (nla_len(tb[IFLA_ADDRESS]) != IEEE802154_ADDR_LEN)
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
|
|
|
|
struct packet_type *pt, struct net_device *orig_dev)
|
|
|
|
{
|
2012-09-01 12:57:06 +07:00
|
|
|
struct sk_buff *local_skb;
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
if (!netif_running(dev))
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
if (dev->type != ARPHRD_IEEE802154)
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
/* check that it's our buffer */
|
2013-01-17 02:09:48 +07:00
|
|
|
if (skb->data[0] == LOWPAN_DISPATCH_IPV6) {
|
|
|
|
/* Copy the packet so that the IPv6 header is
|
|
|
|
* properly aligned.
|
|
|
|
*/
|
|
|
|
local_skb = skb_copy_expand(skb, NET_SKB_PAD - 1,
|
|
|
|
skb_tailroom(skb), GFP_ATOMIC);
|
2012-09-01 12:57:06 +07:00
|
|
|
if (!local_skb)
|
|
|
|
goto drop;
|
|
|
|
|
2013-01-17 02:09:48 +07:00
|
|
|
local_skb->protocol = htons(ETH_P_IPV6);
|
|
|
|
local_skb->pkt_type = PACKET_HOST;
|
|
|
|
|
|
|
|
/* Pull off the 1-byte of 6lowpan header. */
|
|
|
|
skb_pull(local_skb, 1);
|
|
|
|
|
2013-12-11 22:05:34 +07:00
|
|
|
lowpan_give_skb_to_devices(local_skb, NULL);
|
2013-01-17 02:09:48 +07:00
|
|
|
|
|
|
|
kfree_skb(local_skb);
|
2012-09-01 12:57:06 +07:00
|
|
|
kfree_skb(skb);
|
2013-01-17 02:09:48 +07:00
|
|
|
} else {
|
|
|
|
switch (skb->data[0] & 0xe0) {
|
|
|
|
case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
|
|
|
|
case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
|
|
|
|
case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */
|
|
|
|
local_skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
if (!local_skb)
|
|
|
|
goto drop;
|
2013-12-11 22:05:34 +07:00
|
|
|
process_data(local_skb);
|
2013-01-17 02:09:48 +07:00
|
|
|
|
|
|
|
kfree_skb(skb);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
2011-11-10 14:38:38 +07:00
|
|
|
}
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
return NET_RX_SUCCESS;
|
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
return NET_RX_DROP;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int lowpan_newlink(struct net *src_net, struct net_device *dev,
|
|
|
|
struct nlattr *tb[], struct nlattr *data[])
|
|
|
|
{
|
|
|
|
struct net_device *real_dev;
|
|
|
|
struct lowpan_dev_record *entry;
|
|
|
|
|
2012-06-25 10:49:03 +07:00
|
|
|
pr_debug("adding new link\n");
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
if (!tb[IFLA_LINK])
|
|
|
|
return -EINVAL;
|
|
|
|
/* find and hold real wpan device */
|
|
|
|
real_dev = dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
|
|
|
|
if (!real_dev)
|
|
|
|
return -ENODEV;
|
2013-11-07 14:44:45 +07:00
|
|
|
if (real_dev->type != ARPHRD_IEEE802154) {
|
|
|
|
dev_put(real_dev);
|
2013-10-06 10:15:18 +07:00
|
|
|
return -EINVAL;
|
2013-11-07 14:44:45 +07:00
|
|
|
}
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
lowpan_dev_info(dev)->real_dev = real_dev;
|
2013-03-26 00:59:28 +07:00
|
|
|
lowpan_dev_info(dev)->fragment_tag = 0;
|
2011-08-25 09:34:42 +07:00
|
|
|
mutex_init(&lowpan_dev_info(dev)->dev_list_mtx);
|
|
|
|
|
|
|
|
entry = kzalloc(sizeof(struct lowpan_dev_record), GFP_KERNEL);
|
2011-08-30 10:51:09 +07:00
|
|
|
if (!entry) {
|
|
|
|
dev_put(real_dev);
|
|
|
|
lowpan_dev_info(dev)->real_dev = NULL;
|
2011-08-25 09:34:42 +07:00
|
|
|
return -ENOMEM;
|
2011-08-30 10:51:09 +07:00
|
|
|
}
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
entry->ldev = dev;
|
|
|
|
|
2013-10-06 10:15:19 +07:00
|
|
|
/* Set the lowpan harware address to the wpan hardware address. */
|
|
|
|
memcpy(dev->dev_addr, real_dev->dev_addr, IEEE802154_ADDR_LEN);
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
|
|
|
|
INIT_LIST_HEAD(&entry->list);
|
|
|
|
list_add_tail(&entry->list, &lowpan_devices);
|
|
|
|
mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);
|
|
|
|
|
|
|
|
register_netdevice(dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void lowpan_dellink(struct net_device *dev, struct list_head *head)
|
|
|
|
{
|
|
|
|
struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev);
|
|
|
|
struct net_device *real_dev = lowpan_dev->real_dev;
|
2012-04-26 06:24:57 +07:00
|
|
|
struct lowpan_dev_record *entry, *tmp;
|
2011-08-25 09:34:42 +07:00
|
|
|
|
|
|
|
ASSERT_RTNL();
|
|
|
|
|
|
|
|
mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
|
2011-08-30 10:46:40 +07:00
|
|
|
list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
|
2011-08-25 09:34:42 +07:00
|
|
|
if (entry->ldev == dev) {
|
|
|
|
list_del(&entry->list);
|
|
|
|
kfree(entry);
|
|
|
|
}
|
2011-08-30 10:46:40 +07:00
|
|
|
}
|
2011-08-25 09:34:42 +07:00
|
|
|
mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);
|
|
|
|
|
|
|
|
mutex_destroy(&lowpan_dev_info(dev)->dev_list_mtx);
|
|
|
|
|
|
|
|
unregister_netdevice_queue(dev, head);
|
|
|
|
|
|
|
|
dev_put(real_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct rtnl_link_ops lowpan_link_ops __read_mostly = {
|
|
|
|
.kind = "lowpan",
|
|
|
|
.priv_size = sizeof(struct lowpan_dev_info),
|
|
|
|
.setup = lowpan_setup,
|
|
|
|
.newlink = lowpan_newlink,
|
|
|
|
.dellink = lowpan_dellink,
|
|
|
|
.validate = lowpan_validate,
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline int __init lowpan_netlink_init(void)
|
|
|
|
{
|
|
|
|
return rtnl_link_register(&lowpan_link_ops);
|
|
|
|
}
|
|
|
|
|
2013-02-07 03:54:38 +07:00
|
|
|
static inline void lowpan_netlink_fini(void)
|
2011-08-25 09:34:42 +07:00
|
|
|
{
|
|
|
|
rtnl_link_unregister(&lowpan_link_ops);
|
|
|
|
}
|
|
|
|
|
2012-09-01 12:57:07 +07:00
|
|
|
static int lowpan_device_event(struct notifier_block *unused,
|
2013-05-28 08:30:21 +07:00
|
|
|
unsigned long event, void *ptr)
|
2012-09-01 12:57:07 +07:00
|
|
|
{
|
2013-05-28 08:30:21 +07:00
|
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
2012-09-01 12:57:07 +07:00
|
|
|
LIST_HEAD(del_list);
|
|
|
|
struct lowpan_dev_record *entry, *tmp;
|
|
|
|
|
|
|
|
if (dev->type != ARPHRD_IEEE802154)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (event == NETDEV_UNREGISTER) {
|
|
|
|
list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
|
|
|
|
if (lowpan_dev_info(entry->ldev)->real_dev == dev)
|
|
|
|
lowpan_dellink(entry->ldev, &del_list);
|
|
|
|
}
|
|
|
|
|
|
|
|
unregister_netdevice_many(&del_list);
|
2012-09-18 14:10:43 +07:00
|
|
|
}
|
2012-09-01 12:57:07 +07:00
|
|
|
|
|
|
|
out:
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block lowpan_dev_notifier = {
|
|
|
|
.notifier_call = lowpan_device_event,
|
|
|
|
};
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
static struct packet_type lowpan_packet_type = {
|
|
|
|
.type = __constant_htons(ETH_P_IEEE802154),
|
|
|
|
.func = lowpan_rcv,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init lowpan_init_module(void)
|
|
|
|
{
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
err = lowpan_netlink_init();
|
|
|
|
if (err < 0)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
dev_add_pack(&lowpan_packet_type);
|
2012-09-01 12:57:07 +07:00
|
|
|
|
|
|
|
err = register_netdevice_notifier(&lowpan_dev_notifier);
|
|
|
|
if (err < 0) {
|
|
|
|
dev_remove_pack(&lowpan_packet_type);
|
|
|
|
lowpan_netlink_fini();
|
|
|
|
}
|
2011-08-25 09:34:42 +07:00
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit lowpan_cleanup_module(void)
|
|
|
|
{
|
2012-07-11 04:22:48 +07:00
|
|
|
struct lowpan_fragment *frame, *tframe;
|
|
|
|
|
2011-08-25 09:34:42 +07:00
|
|
|
lowpan_netlink_fini();
|
|
|
|
|
|
|
|
dev_remove_pack(&lowpan_packet_type);
|
2012-07-11 04:22:48 +07:00
|
|
|
|
2012-09-01 12:57:07 +07:00
|
|
|
unregister_netdevice_notifier(&lowpan_dev_notifier);
|
|
|
|
|
2012-07-11 04:22:48 +07:00
|
|
|
/* Now 6lowpan packet_type is removed, so no new fragments are
|
|
|
|
* expected on RX, therefore that's the time to clean incomplete
|
|
|
|
* fragments.
|
|
|
|
*/
|
|
|
|
spin_lock_bh(&flist_lock);
|
|
|
|
list_for_each_entry_safe(frame, tframe, &lowpan_fragments, list) {
|
|
|
|
del_timer_sync(&frame->timer);
|
|
|
|
list_del(&frame->list);
|
|
|
|
dev_kfree_skb(frame->skb);
|
|
|
|
kfree(frame);
|
|
|
|
}
|
|
|
|
spin_unlock_bh(&flist_lock);
|
2011-08-25 09:34:42 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(lowpan_init_module);
|
|
|
|
module_exit(lowpan_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS_RTNL_LINK("lowpan");
|