From: Alexander Smirnov <alex.bluesman.smir...@gmail.com>
Support for monitor device intended to capture all the network
activity. This interface could be used by networks sniffers.
Signed-off-by: Alexander Smirnov <alex.bluesman.smir...@gmail.com>
---
include/linux/if_arp.h | 1 +
include/linux/nl802154.h | 5 ++
include/net/wpan-phy.h | 2 +
net/mac802154/Makefile | 2 +-
net/mac802154/ieee802154_dev.c | 5 ++-
net/mac802154/mac802154.h | 3 +
net/mac802154/monitor.c | 115 ++++++++++++++++++++++++++++++++++++++++
net/mac802154/rx.c | 1 +
8 files changed, 132 insertions(+), 2 deletions(-)
create mode 100644 net/mac802154/monitor.c
diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h
index 6d722f4..f0e69c6 100644
--- a/include/linux/if_arp.h
+++ b/include/linux/if_arp.h
@@ -87,6 +87,7 @@
#define ARPHRD_IEEE80211_PRISM 802 /* IEEE 802.11 + Prism2 header */
#define ARPHRD_IEEE80211_RADIOTAP 803 /* IEEE 802.11 + radiotap header */
#define ARPHRD_IEEE802154 804
+#define ARPHRD_IEEE802154_MONITOR 805 /* IEEE 802.15.4 network monitor */
#define ARPHRD_PHONET 820 /* PhoNet media type */
#define ARPHRD_PHONET_PIPE 821 /* PhoNet pipe header */
diff --git a/include/linux/nl802154.h b/include/linux/nl802154.h
index d2b5ae2..04b2896 100644
--- a/include/linux/nl802154.h
+++ b/include/linux/nl802154.h
@@ -124,4 +124,9 @@ enum {
#define IEEE802154_CMD_MAX (__IEEE802154_CMD_MAX - 1)
+enum {
+ IEEE802154_DEV_MONITOR,
+ __IEEE802154_DEV_MAX,
+};
+
#endif
diff --git a/include/net/wpan-phy.h b/include/net/wpan-phy.h
index 0c2c931..368da0b 100644
--- a/include/net/wpan-phy.h
+++ b/include/net/wpan-phy.h
@@ -24,6 +24,8 @@
#include <linux/netdevice.h>
#include <linux/mutex.h>
+#define WPAN_NUM_PAGES 32
+
struct wpan_phy {
struct mutex pib_lock;
diff --git a/net/mac802154/Makefile b/net/mac802154/Makefile
index 6b348b0..ec1bd3f 100644
--- a/net/mac802154/Makefile
+++ b/net/mac802154/Makefile
@@ -1,2 +1,2 @@
obj-$(CONFIG_MAC802154) += mac802154.o
-mac802154-objs := ieee802154_dev.o rx.o tx.o mac_cmd.o mib.o
+mac802154-objs := ieee802154_dev.o rx.o tx.o mac_cmd.o mib.o monitor.o
diff --git a/net/mac802154/ieee802154_dev.c b/net/mac802154/ieee802154_dev.c
index 649409c..03330d3 100644
--- a/net/mac802154/ieee802154_dev.c
+++ b/net/mac802154/ieee802154_dev.c
@@ -126,8 +126,11 @@ static struct net_device *mac802154_add_iface(struct
wpan_phy *phy,
struct net_device *dev;
int err = -ENOMEM;
- /* No devices is currently supported */
switch (type) {
+ case IEEE802154_DEV_MONITOR:
+ dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
+ name, mac802154_monitor_setup);
+ break;
default:
dev = NULL;
err = -EINVAL;
diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h
index f6f6f0a..2a301d0 100644
--- a/net/mac802154/mac802154.h
+++ b/net/mac802154/mac802154.h
@@ -90,6 +90,9 @@ extern struct ieee802154_reduced_mlme_ops
mac802154_mlme_reduced;
int mac802154_slave_open(struct net_device *dev);
int mac802154_slave_close(struct net_device *dev);
+void mac802154_monitors_rx(struct mac802154_priv *priv, struct sk_buff *skb);
+void mac802154_monitor_setup(struct net_device *dev);
+
netdev_tx_t mac802154_tx(struct mac802154_priv *priv, struct sk_buff *skb,
u8 page, u8 chan);
diff --git a/net/mac802154/monitor.c b/net/mac802154/monitor.c
new file mode 100644
index 0000000..ccc5e81
--- /dev/null
+++ b/net/mac802154/monitor.c
@@ -0,0 +1,115 @@
+/*
+ * 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 <dbarysh...@gmail.com>
+ * Sergey Lapin <sla...@ossfans.org>
+ * Maxim Gorbachyov <maxim.gorbac...@siemens.com>
+ */
+
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/crc-ccitt.h>
+#include <linux/nl802154.h>
+#include <net/ieee802154.h>
+#include <net/mac802154.h>
+#include <net/wpan-phy.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 == (u8)-1) /* not init */
+ return NETDEV_TX_OK;
+
+ BUG_ON(page >= WPAN_NUM_PAGES);
+ BUG_ON(chan >= 27);
+
+ 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;
+
+ if (in_interrupt())
+ netif_rx(skb2);
+ else
+ 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; /* 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 = -1; /* not initialized */
+ priv->page = 0; /* for compat */
+}
+
diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c
index d469bef..335efbf 100644
--- a/net/mac802154/rx.c
+++ b/net/mac802154/rx.c
@@ -60,6 +60,7 @@ mac802154_subif_rx(struct ieee802154_dev *hw, struct sk_buff
*skb, u8 lqi)
skb_trim(skb, skb->len - 2); /* CRC */
}
+ mac802154_monitors_rx(priv, skb);
out:
dev_kfree_skb(skb);
return;
--
1.7.0.4
------------------------------------------------------------------------------
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