monitor.c
3.06 KB
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/*
* 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;
}