drivers/net/ieee802154/fakelb.c - linux - Git at Google

 /*
  * Loopback IEEE 802.15.4 interface
  *
  * Copyright 2007-2012 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.
  *
  * Written by:
  * Sergey Lapin <slapin@ossfans.org>
  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
  */

 #include <linux/module.h>
 #include <linux/timer.h>
 #include <linux/platform_device.h>
 #include <linux/netdevice.h>
 #include <linux/device.h>
 #include <linux/spinlock.h>
 #include <net/mac802154.h>
 #include <net/cfg802154.h>

 static int numlbs = 2;

 static LIST_HEAD(fakelb_phys);
 static DEFINE_MUTEX(fakelb_phys_lock);

 static LIST_HEAD(fakelb_ifup_phys);
 static DEFINE_RWLOCK(fakelb_ifup_phys_lock);

 struct fakelb_phy {
 	struct ieee802154_hw *hw;

 	u8 page;
 	u8 channel;

 	bool suspended;

 	struct list_head list;
 	struct list_head list_ifup;
 };

 static int fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level)
 {
 	WARN_ON(!level);
 	*level = 0xbe;

 	return 0;
 }

 static int fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
 {
 	struct fakelb_phy *phy = hw->priv;

 	write_lock_bh(&fakelb_ifup_phys_lock);
 	phy->page = page;
 	phy->channel = channel;
 	write_unlock_bh(&fakelb_ifup_phys_lock);
 	return 0;
 }

 static int fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
 {
 	struct fakelb_phy *current_phy = hw->priv, *phy;

 	read_lock_bh(&fakelb_ifup_phys_lock);
 	WARN_ON(current_phy->suspended);
 	list_for_each_entry(phy, &fakelb_ifup_phys, list_ifup) {
 		if (current_phy == phy)
 			continue;

 		if (current_phy->page == phy->page &&
 		    current_phy->channel == phy->channel) {
 			struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);

 			if (newskb)
 				ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc);
 		}
 	}
 	read_unlock_bh(&fakelb_ifup_phys_lock);

 	ieee802154_xmit_complete(hw, skb, false);
 	return 0;
 }

 static int fakelb_hw_start(struct ieee802154_hw *hw)
 {
 	struct fakelb_phy *phy = hw->priv;

 	write_lock_bh(&fakelb_ifup_phys_lock);
 	phy->suspended = false;
 	list_add(&phy->list_ifup, &fakelb_ifup_phys);
 	write_unlock_bh(&fakelb_ifup_phys_lock);

 	return 0;
 }

 static void fakelb_hw_stop(struct ieee802154_hw *hw)
 {
 	struct fakelb_phy *phy = hw->priv;

 	write_lock_bh(&fakelb_ifup_phys_lock);
 	phy->suspended = true;
 	list_del(&phy->list_ifup);
 	write_unlock_bh(&fakelb_ifup_phys_lock);
 }

 static int
 fakelb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
 {
 	return 0;
 }

 static const struct ieee802154_ops fakelb_ops = {
 	.owner = THIS_MODULE,
 	.xmit_async = fakelb_hw_xmit,
 	.ed = fakelb_hw_ed,
 	.set_channel = fakelb_hw_channel,
 	.start = fakelb_hw_start,
 	.stop = fakelb_hw_stop,
 	.set_promiscuous_mode = fakelb_set_promiscuous_mode,
 };

 /* Number of dummy devices to be set up by this module. */
 module_param(numlbs, int, 0);
 MODULE_PARM_DESC(numlbs, " number of pseudo devices");

 static int fakelb_add_one(struct device *dev)
 {
 	struct ieee802154_hw *hw;
 	struct fakelb_phy *phy;
 	int err;

 	hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops);
 	if (!hw)
 		return -ENOMEM;

 	phy = hw->priv;
 	phy->hw = hw;

 	/* 868 MHz BPSK	802.15.4-2003 */
 	hw->phy->supported.channels[0] |= 1;
 	/* 915 MHz BPSK	802.15.4-2003 */
 	hw->phy->supported.channels[0] |= 0x7fe;
 	/* 2.4 GHz O-QPSK 802.15.4-2003 */
 	hw->phy->supported.channels[0] |= 0x7FFF800;
 	/* 868 MHz ASK 802.15.4-2006 */
 	hw->phy->supported.channels[1] |= 1;
 	/* 915 MHz ASK 802.15.4-2006 */
 	hw->phy->supported.channels[1] |= 0x7fe;
 	/* 868 MHz O-QPSK 802.15.4-2006 */
 	hw->phy->supported.channels[2] |= 1;
 	/* 915 MHz O-QPSK 802.15.4-2006 */
 	hw->phy->supported.channels[2] |= 0x7fe;
 	/* 2.4 GHz CSS 802.15.4a-2007 */
 	hw->phy->supported.channels[3] |= 0x3fff;
 	/* UWB Sub-gigahertz 802.15.4a-2007 */
 	hw->phy->supported.channels[4] |= 1;
 	/* UWB Low band 802.15.4a-2007 */
 	hw->phy->supported.channels[4] |= 0x1e;
 	/* UWB High band 802.15.4a-2007 */
 	hw->phy->supported.channels[4] |= 0xffe0;
 	/* 750 MHz O-QPSK 802.15.4c-2009 */
 	hw->phy->supported.channels[5] |= 0xf;
 	/* 750 MHz MPSK 802.15.4c-2009 */
 	hw->phy->supported.channels[5] |= 0xf0;
 	/* 950 MHz BPSK 802.15.4d-2009 */
 	hw->phy->supported.channels[6] |= 0x3ff;
 	/* 950 MHz GFSK 802.15.4d-2009 */
 	hw->phy->supported.channels[6] |= 0x3ffc00;

 	ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
 	/* fake phy channel 13 as default */
 	hw->phy->current_channel = 13;
 	phy->channel = hw->phy->current_channel;

 	hw->flags = IEEE802154_HW_PROMISCUOUS;
 	hw->parent = dev;

 	err = ieee802154_register_hw(hw);
 	if (err)
 		goto err_reg;

 	mutex_lock(&fakelb_phys_lock);
 	list_add_tail(&phy->list, &fakelb_phys);
 	mutex_unlock(&fakelb_phys_lock);

 	return 0;

 err_reg:
 	ieee802154_free_hw(phy->hw);
 	return err;
 }

 static void fakelb_del(struct fakelb_phy *phy)
 {
 	list_del(&phy->list);

 	ieee802154_unregister_hw(phy->hw);
 	ieee802154_free_hw(phy->hw);
 }

 static int fakelb_probe(struct platform_device *pdev)
 {
 	struct fakelb_phy *phy, *tmp;
 	int err, i;

 	for (i = 0; i < numlbs; i++) {
 		err = fakelb_add_one(&pdev->dev);
 		if (err < 0)
 			goto err_slave;
 	}

 	dev_info(&pdev->dev, "added %i fake ieee802154 hardware devices\n", numlbs);
 	return 0;

 err_slave:
 	mutex_lock(&fakelb_phys_lock);
 	list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
 		fakelb_del(phy);
 	mutex_unlock(&fakelb_phys_lock);
 	return err;
 }

 static int fakelb_remove(struct platform_device *pdev)
 {
 	struct fakelb_phy *phy, *tmp;

 	mutex_lock(&fakelb_phys_lock);
 	list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
 		fakelb_del(phy);
 	mutex_unlock(&fakelb_phys_lock);
 	return 0;
 }

 static struct platform_device *ieee802154fake_dev;

 static struct platform_driver ieee802154fake_driver = {
 	.probe = fakelb_probe,
 	.remove = fakelb_remove,
 	.driver = {
 			.name = "ieee802154fakelb",
 	},
 };

 static __init int fakelb_init_module(void)
 {
 	ieee802154fake_dev = platform_device_register_simple(
 			     "ieee802154fakelb", -1, NULL, 0);

 	pr_warn("fakelb driver is marked as deprecated, please use mac802154_hwsim!\n");

 	return platform_driver_register(&ieee802154fake_driver);
 }

 static __exit void fake_remove_module(void)
 {
 	platform_driver_unregister(&ieee802154fake_driver);
 	platform_device_unregister(ieee802154fake_dev);
 }

 module_init(fakelb_init_module);
 module_exit(fake_remove_module);
 MODULE_LICENSE("GPL");
	/*
	* Loopback IEEE 802.15.4 interface
	*
	* Copyright 2007-2012 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.
	*
	* Written by:
	* Sergey Lapin <slapin@ossfans.org>
	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	*/

	#include <linux/module.h>
	#include <linux/timer.h>
	#include <linux/platform_device.h>
	#include <linux/netdevice.h>
	#include <linux/device.h>
	#include <linux/spinlock.h>
	#include <net/mac802154.h>
	#include <net/cfg802154.h>

	static int numlbs = 2;

	static LIST_HEAD(fakelb_phys);
	static DEFINE_MUTEX(fakelb_phys_lock);

	static LIST_HEAD(fakelb_ifup_phys);
	static DEFINE_RWLOCK(fakelb_ifup_phys_lock);

	struct fakelb_phy {
	struct ieee802154_hw *hw;

	u8 page;
	u8 channel;

	bool suspended;

	struct list_head list;
	struct list_head list_ifup;
	};

	static int fakelb_hw_ed(struct ieee802154_hw hw, u8 level)
	{
	WARN_ON(!level);
	*level = 0xbe;

	return 0;
	}

	static int fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
	{
	struct fakelb_phy *phy = hw->priv;

	write_lock_bh(&fakelb_ifup_phys_lock);
	phy->page = page;
	phy->channel = channel;
	write_unlock_bh(&fakelb_ifup_phys_lock);
	return 0;
	}

	static int fakelb_hw_xmit(struct ieee802154_hw hw, struct sk_buff skb)
	{
	struct fakelb_phy current_phy = hw->priv, phy;

	read_lock_bh(&fakelb_ifup_phys_lock);
	WARN_ON(current_phy->suspended);
	list_for_each_entry(phy, &fakelb_ifup_phys, list_ifup) {
	if (current_phy == phy)
	continue;

	if (current_phy->page == phy->page &&
	current_phy->channel == phy->channel) {
	struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);

	if (newskb)
	ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc);
	}
	}
	read_unlock_bh(&fakelb_ifup_phys_lock);

	ieee802154_xmit_complete(hw, skb, false);
	return 0;
	}

	static int fakelb_hw_start(struct ieee802154_hw *hw)
	{
	struct fakelb_phy *phy = hw->priv;

	write_lock_bh(&fakelb_ifup_phys_lock);
	phy->suspended = false;
	list_add(&phy->list_ifup, &fakelb_ifup_phys);
	write_unlock_bh(&fakelb_ifup_phys_lock);

	return 0;
	}

	static void fakelb_hw_stop(struct ieee802154_hw *hw)
	{
	struct fakelb_phy *phy = hw->priv;

	write_lock_bh(&fakelb_ifup_phys_lock);
	phy->suspended = true;
	list_del(&phy->list_ifup);
	write_unlock_bh(&fakelb_ifup_phys_lock);
	}

	static int
	fakelb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
	{
	return 0;
	}

	static const struct ieee802154_ops fakelb_ops = {
	.owner = THIS_MODULE,
	.xmit_async = fakelb_hw_xmit,
	.ed = fakelb_hw_ed,
	.set_channel = fakelb_hw_channel,
	.start = fakelb_hw_start,
	.stop = fakelb_hw_stop,
	.set_promiscuous_mode = fakelb_set_promiscuous_mode,
	};

	/* Number of dummy devices to be set up by this module. */
	module_param(numlbs, int, 0);
	MODULE_PARM_DESC(numlbs, " number of pseudo devices");

	static int fakelb_add_one(struct device *dev)
	{
	struct ieee802154_hw *hw;
	struct fakelb_phy *phy;
	int err;

	hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops);
	if (!hw)
	return -ENOMEM;

	phy = hw->priv;
	phy->hw = hw;

	/* 868 MHz BPSK 802.15.4-2003 */
	hw->phy->supported.channels[0] \|= 1;
	/* 915 MHz BPSK 802.15.4-2003 */
	hw->phy->supported.channels[0] \|= 0x7fe;
	/* 2.4 GHz O-QPSK 802.15.4-2003 */
	hw->phy->supported.channels[0] \|= 0x7FFF800;
	/* 868 MHz ASK 802.15.4-2006 */
	hw->phy->supported.channels[1] \|= 1;
	/* 915 MHz ASK 802.15.4-2006 */
	hw->phy->supported.channels[1] \|= 0x7fe;
	/* 868 MHz O-QPSK 802.15.4-2006 */
	hw->phy->supported.channels[2] \|= 1;
	/* 915 MHz O-QPSK 802.15.4-2006 */
	hw->phy->supported.channels[2] \|= 0x7fe;
	/* 2.4 GHz CSS 802.15.4a-2007 */
	hw->phy->supported.channels[3] \|= 0x3fff;
	/* UWB Sub-gigahertz 802.15.4a-2007 */
	hw->phy->supported.channels[4] \|= 1;
	/* UWB Low band 802.15.4a-2007 */
	hw->phy->supported.channels[4] \|= 0x1e;
	/* UWB High band 802.15.4a-2007 */
	hw->phy->supported.channels[4] \|= 0xffe0;
	/* 750 MHz O-QPSK 802.15.4c-2009 */
	hw->phy->supported.channels[5] \|= 0xf;
	/* 750 MHz MPSK 802.15.4c-2009 */
	hw->phy->supported.channels[5] \|= 0xf0;
	/* 950 MHz BPSK 802.15.4d-2009 */
	hw->phy->supported.channels[6] \|= 0x3ff;
	/* 950 MHz GFSK 802.15.4d-2009 */
	hw->phy->supported.channels[6] \|= 0x3ffc00;

	ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
	/* fake phy channel 13 as default */
	hw->phy->current_channel = 13;
	phy->channel = hw->phy->current_channel;

	hw->flags = IEEE802154_HW_PROMISCUOUS;
	hw->parent = dev;

	err = ieee802154_register_hw(hw);
	if (err)
	goto err_reg;

	mutex_lock(&fakelb_phys_lock);
	list_add_tail(&phy->list, &fakelb_phys);
	mutex_unlock(&fakelb_phys_lock);

	return 0;

	err_reg:
	ieee802154_free_hw(phy->hw);
	return err;
	}

	static void fakelb_del(struct fakelb_phy *phy)
	{
	list_del(&phy->list);

	ieee802154_unregister_hw(phy->hw);
	ieee802154_free_hw(phy->hw);
	}

	static int fakelb_probe(struct platform_device *pdev)
	{
	struct fakelb_phy phy, tmp;
	int err, i;

	for (i = 0; i < numlbs; i++) {
	err = fakelb_add_one(&pdev->dev);
	if (err < 0)
	goto err_slave;
	}

	dev_info(&pdev->dev, "added %i fake ieee802154 hardware devices\n", numlbs);
	return 0;

	err_slave:
	mutex_lock(&fakelb_phys_lock);
	list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
	fakelb_del(phy);
	mutex_unlock(&fakelb_phys_lock);
	return err;
	}

	static int fakelb_remove(struct platform_device *pdev)
	{
	struct fakelb_phy phy, tmp;

	mutex_lock(&fakelb_phys_lock);
	list_for_each_entry_safe(phy, tmp, &fakelb_phys, list)
	fakelb_del(phy);
	mutex_unlock(&fakelb_phys_lock);
	return 0;
	}

	static struct platform_device *ieee802154fake_dev;

	static struct platform_driver ieee802154fake_driver = {
	.probe = fakelb_probe,
	.remove = fakelb_remove,
	.driver = {
	.name = "ieee802154fakelb",
	},
	};

	static __init int fakelb_init_module(void)
	{
	ieee802154fake_dev = platform_device_register_simple(
	"ieee802154fakelb", -1, NULL, 0);

	pr_warn("fakelb driver is marked as deprecated, please use mac802154_hwsim!\n");

	return platform_driver_register(&ieee802154fake_driver);
	}

	static __exit void fake_remove_module(void)
	{
	platform_driver_unregister(&ieee802154fake_driver);
	platform_device_unregister(ieee802154fake_dev);
	}

	module_init(fakelb_init_module);
	module_exit(fake_remove_module);
	MODULE_LICENSE("GPL");