@@ -20,3 +20,16 @@ config IEEE802154_FAKEHARD
This driver can also be built as a module. To do so say M here.
The module will be called 'fakehard'.
+
+if IEEE802154_DRIVERS && MAC802154
+config IEEE802154_FAKELB
+ tristate "Fake LR-WPAN driver with several interconnected devices"
+ ---help---
+ Say Y here to enable the fake driver that can emulate a net
+ of several interconnected radio devices.
+
+ This driver can also be built as a module. To do so say M here.
+ The module will be called 'fakelb'.
+
+endif
+
@@ -1,3 +1,4 @@
obj-$(CONFIG_IEEE802154_FAKEHARD) += fakehard.o
+obj-$(CONFIG_IEEE802154_FAKELB) += fakelb.o
EXTRA_CFLAGS += -DDEBUG -DCONFIG_FFD
new file mode 100644
@@ -0,0 +1,255 @@
+/*
+ * Loopback IEEE 802.15.4 interface
+ *
+ * Copyright 2007, 2008 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:
+ * Sergey Lapin <slapin@ossfans.org>
+ * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <net/mac802154.h>
+
+struct fake_dev_priv {
+ struct ieee802154_dev *dev;
+
+ struct list_head list;
+ struct fake_priv *fake;
+
+ unsigned int working:1;
+};
+
+static int radios = 3;
+module_param(radios, int, 0444);
+MODULE_PARM_DESC(radios, "Number of simulated radios");
+
+struct fake_priv {
+ struct list_head list;
+ rwlock_t lock;
+};
+
+static int
+hw_ed(struct ieee802154_dev *dev, u8 *level)
+{
+ pr_debug("%s\n", __func__);
+ might_sleep();
+ BUG_ON(!level);
+ *level = 0xbe;
+ return 0;
+}
+
+static int
+hw_channel(struct ieee802154_dev *dev, int channel)
+{
+ pr_debug("%s %d\n", __func__, channel);
+ might_sleep();
+ dev->current_channel = channel;
+ return 0;
+}
+
+static void
+hw_deliver(struct fake_dev_priv *priv, struct sk_buff *skb)
+{
+ struct sk_buff *newskb;
+
+ if (!priv->working)
+ return;
+
+ newskb = pskb_copy(skb, GFP_ATOMIC);
+
+ ieee802154_rx_irqsafe(priv->dev, newskb, 0xcc);
+}
+
+static int
+hw_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
+{
+ struct fake_dev_priv *priv = dev->priv;
+ struct fake_priv *fake = priv->fake;
+
+ might_sleep();
+
+ read_lock_bh(&fake->lock);
+ if (priv->list.next == priv->list.prev) {
+ /* we are the only one device */
+ hw_deliver(priv, skb);
+ } else {
+ struct fake_dev_priv *dp;
+ list_for_each_entry(dp, &priv->fake->list, list)
+ if (dp != priv &&
+ dp->dev->current_channel ==
+ priv->dev->current_channel)
+ hw_deliver(dp, skb);
+ }
+ read_unlock_bh(&fake->lock);
+
+ return 0;
+}
+
+static int
+hw_start(struct ieee802154_dev *dev) {
+ struct fake_dev_priv *priv = dev->priv;
+
+ if (priv->working)
+ return -EBUSY;
+
+ priv->working = 1;
+
+ return 0;
+}
+
+static void
+hw_stop(struct ieee802154_dev *dev) {
+ struct fake_dev_priv *priv = dev->priv;
+
+ priv->working = 0;
+}
+
+static struct ieee802154_ops fake_ops = {
+ .owner = THIS_MODULE,
+ .xmit = hw_xmit,
+ .ed = hw_ed,
+ .set_channel = hw_channel,
+ .start = hw_start,
+ .stop = hw_stop,
+};
+
+static int ieee802154fake_add_priv(struct device *dev, struct fake_priv *fake)
+{
+ struct fake_dev_priv *priv;
+ int err = -ENOMEM;
+ struct ieee802154_dev *ieee;
+
+ ieee = ieee802154_alloc_device(sizeof(*priv), &fake_ops);
+ if (!dev)
+ goto err_alloc_dev;
+
+ priv = ieee->priv;
+ priv->dev = ieee;
+
+ INIT_LIST_HEAD(&priv->list);
+ priv->fake = fake;
+
+ ieee->parent = dev;
+
+ err = ieee802154_register_device(ieee);
+ if (err)
+ goto err_reg;
+
+ write_lock_bh(&fake->lock);
+ list_add_tail(&priv->list, &fake->list);
+ write_unlock_bh(&fake->lock);
+
+ return 0;
+
+err_reg:
+ ieee802154_free_device(priv->dev);
+err_alloc_dev:
+ return err;
+}
+
+static void ieee802154fake_del_priv(struct fake_dev_priv *priv)
+{
+ write_lock_bh(&priv->fake->lock);
+ list_del(&priv->list);
+ write_unlock_bh(&priv->fake->lock);
+
+ ieee802154_unregister_device(priv->dev);
+ ieee802154_free_device(priv->dev);
+}
+
+static int __devinit ieee802154fake_probe(struct platform_device *pdev)
+{
+ struct fake_priv *priv;
+ struct fake_dev_priv *dp;
+ int err = -ENOMEM;
+ int i;
+
+ if (radios < 1 || radios > 100)
+ return -EINVAL;
+
+ priv = kzalloc(sizeof(struct fake_priv), GFP_KERNEL);
+ if (!priv)
+ goto err_alloc;
+
+ INIT_LIST_HEAD(&priv->list);
+ rwlock_init(&priv->lock);
+
+ for (i = 0; i < radios; i++) {
+ err = ieee802154fake_add_priv(&pdev->dev, priv);
+ if (err < 0)
+ goto err_slave;
+ }
+
+ platform_set_drvdata(pdev, priv);
+ dev_info(&pdev->dev, "Added ieee802154 hardware\n");
+ return 0;
+
+err_slave:
+ list_for_each_entry(dp, &priv->list, list)
+ ieee802154fake_del_priv(dp);
+err_grp:
+ kfree(priv);
+err_alloc:
+ return err;
+}
+
+static int __devexit ieee802154fake_remove(struct platform_device *pdev)
+{
+ struct fake_priv *priv = platform_get_drvdata(pdev);
+ struct fake_dev_priv *dp, *temp;
+
+ list_for_each_entry_safe(dp, temp, &priv->list, list)
+ ieee802154fake_del_priv(dp);
+ kfree(priv);
+ return 0;
+}
+
+static struct platform_device *ieee802154fake_dev;
+
+static struct platform_driver ieee802154fake_driver = {
+ .probe = ieee802154fake_probe,
+ .remove = __devexit_p(ieee802154fake_remove),
+ .driver = {
+ .name = "ieee802154fakelb",
+ .owner = THIS_MODULE,
+ },
+};
+
+static __init int fake_init(void)
+{
+ ieee802154fake_dev = platform_device_register_simple(
+ "ieee802154fakelb", -1, NULL, 0);
+ return platform_driver_register(&ieee802154fake_driver);
+}
+
+static __exit void fake_exit(void)
+{
+ platform_driver_unregister(&ieee802154fake_driver);
+ platform_device_unregister(ieee802154fake_dev);
+}
+
+module_init(fake_init);
+module_exit(fake_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dmitry Eremin-Solenikov, Sergey Lapin");
+
+