mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
0606069d9e
Support for monitor device intended to capture all the network activity. This interface could be used by networks sniffers and is already supported by WireShark. That's a good test point to check that basic MAC support works. Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
|
|
* Copyright 2007, 2008, 2009 Siemens AG
|
|
*
|
|
* 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.
|
|
*
|
|
* Written by:
|
|
* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
|
|
* Sergey Lapin <slapin@ossfans.org>
|
|
* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
|
|
* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
|
|
*/
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/crc-ccitt.h>
|
|
|
|
#include <net/ieee802154.h>
|
|
#include <net/mac802154.h>
|
|
#include <net/netlink.h>
|
|
#include <net/wpan-phy.h>
|
|
#include <linux/nl802154.h>
|
|
|
|
#include "mac802154.h"
|
|
|
|
static netdev_tx_t mac802154_monitor_xmit(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct mac802154_sub_if_data *priv;
|
|
u8 chan, page;
|
|
|
|
priv = netdev_priv(dev);
|
|
|
|
/* FIXME: locking */
|
|
chan = priv->hw->phy->current_channel;
|
|
page = priv->hw->phy->current_page;
|
|
|
|
if (chan == MAC802154_CHAN_NONE) /* not initialized */
|
|
return NETDEV_TX_OK;
|
|
|
|
if (WARN_ON(page >= WPAN_NUM_PAGES) ||
|
|
WARN_ON(chan >= WPAN_NUM_CHANNELS))
|
|
return NETDEV_TX_OK;
|
|
|
|
skb->skb_iif = dev->ifindex;
|
|
dev->stats.tx_packets++;
|
|
dev->stats.tx_bytes += skb->len;
|
|
|
|
return mac802154_tx(priv->hw, skb, page, chan);
|
|
}
|
|
|
|
|
|
void mac802154_monitors_rx(struct mac802154_priv *priv, struct sk_buff *skb)
|
|
{
|
|
struct sk_buff *skb2;
|
|
struct mac802154_sub_if_data *sdata;
|
|
u16 crc = crc_ccitt(0, skb->data, skb->len);
|
|
u8 *data;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &priv->slaves, list) {
|
|
if (sdata->type != IEEE802154_DEV_MONITOR)
|
|
continue;
|
|
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
skb2->dev = sdata->dev;
|
|
skb2->pkt_type = PACKET_HOST;
|
|
data = skb_put(skb2, 2);
|
|
data[0] = crc & 0xff;
|
|
data[1] = crc >> 8;
|
|
|
|
netif_rx_ni(skb2);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static const struct net_device_ops mac802154_monitor_ops = {
|
|
.ndo_open = mac802154_slave_open,
|
|
.ndo_stop = mac802154_slave_close,
|
|
.ndo_start_xmit = mac802154_monitor_xmit,
|
|
};
|
|
|
|
void mac802154_monitor_setup(struct net_device *dev)
|
|
{
|
|
struct mac802154_sub_if_data *priv;
|
|
|
|
dev->addr_len = 0;
|
|
dev->hard_header_len = 0;
|
|
dev->needed_tailroom = 2; /* room for FCS */
|
|
dev->mtu = IEEE802154_MTU;
|
|
dev->tx_queue_len = 10;
|
|
dev->type = ARPHRD_IEEE802154_MONITOR;
|
|
dev->flags = IFF_NOARP | IFF_BROADCAST;
|
|
dev->watchdog_timeo = 0;
|
|
|
|
dev->destructor = free_netdev;
|
|
dev->netdev_ops = &mac802154_monitor_ops;
|
|
dev->ml_priv = &mac802154_mlme_reduced;
|
|
|
|
priv = netdev_priv(dev);
|
|
priv->type = IEEE802154_DEV_MONITOR;
|
|
|
|
priv->chan = MAC802154_CHAN_NONE; /* not initialized */
|
|
priv->page = 0;
|
|
}
|