[deliverable/linux.git] / net / mac802154 / iface.c

/*
 * 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:
 * 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/module.h>
#include <linux/if_arp.h>
#include <linux/ieee802154.h>

#include <net/nl802154.h>
#include <net/mac802154.h>
#include <net/ieee802154_netdev.h>
#include <net/cfg802154.h>

#include "ieee802154_i.h"
#include "driver-ops.h"

static int mac802154_wpan_update_llsec(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	int rc = 0;

	if (ops->llsec) {
		struct ieee802154_llsec_params params;
		int changed = 0;

		params.pan_id = wpan_dev->pan_id;
		changed |= IEEE802154_LLSEC_PARAM_PAN_ID;

		params.hwaddr = wpan_dev->extended_addr;
		changed |= IEEE802154_LLSEC_PARAM_HWADDR;

		rc = ops->llsec->set_params(dev, &params, changed);
	}

	return rc;
}

static int
mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct sockaddr_ieee802154 *sa =
		(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	int err = -ENOIOCTLCMD;

	ASSERT_RTNL();

	spin_lock_bh(&sdata->mib_lock);

	switch (cmd) {
	case SIOCGIFADDR:
	{
		u16 pan_id, short_addr;

		pan_id = le16_to_cpu(wpan_dev->pan_id);
		short_addr = le16_to_cpu(wpan_dev->short_addr);
		if (pan_id == IEEE802154_PANID_BROADCAST ||
		    short_addr == IEEE802154_ADDR_BROADCAST) {
			err = -EADDRNOTAVAIL;
			break;
		}

		sa->family = AF_IEEE802154;
		sa->addr.addr_type = IEEE802154_ADDR_SHORT;
		sa->addr.pan_id = pan_id;
		sa->addr.short_addr = short_addr;

		err = 0;
		break;
	}
	case SIOCSIFADDR:
		if (netif_running(dev)) {
			spin_unlock_bh(&sdata->mib_lock);
			return -EBUSY;
		}

		dev_warn(&dev->dev,
			 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
		if (sa->family != AF_IEEE802154 ||
		    sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
		    sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
		    sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
		    sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
			err = -EINVAL;
			break;
		}

		wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
		wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);

		err = mac802154_wpan_update_llsec(dev);
		break;
	}

	spin_unlock_bh(&sdata->mib_lock);
	return err;
}

static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct sockaddr *addr = p;
	__le64 extended_addr;

	if (netif_running(dev))
		return -EBUSY;

	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
	if (!ieee802154_is_valid_extended_addr(extended_addr))
		return -EINVAL;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	sdata->wpan_dev.extended_addr = extended_addr;

	return mac802154_wpan_update_llsec(dev);
}

static int mac802154_slave_open(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_sub_if_data *subif;
	struct ieee802154_local *local = sdata->local;
	int res = 0;

	ASSERT_RTNL();

	if (sdata->vif.type == NL802154_IFTYPE_NODE) {
		mutex_lock(&sdata->local->iflist_mtx);
		list_for_each_entry(subif, &sdata->local->interfaces, list) {
			if (subif != sdata &&
			    subif->vif.type == sdata->vif.type &&
			    ieee802154_sdata_running(subif)) {
				mutex_unlock(&sdata->local->iflist_mtx);
				return -EBUSY;
			}
		}
		mutex_unlock(&sdata->local->iflist_mtx);
	}

	set_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count) {
		res = drv_start(local);
		WARN_ON(res);
		if (res)
			goto err;
	}

	local->open_count++;
	netif_start_queue(dev);
	return 0;
err:
	/* might already be clear but that doesn't matter */
	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	return res;
}

static int mac802154_wpan_open(struct net_device *dev)
{
	int rc;
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct wpan_phy *phy = sdata->local->phy;

	rc = mac802154_slave_open(dev);
	if (rc < 0)
		return rc;

	mutex_lock(&phy->pib_lock);

	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
		rc = drv_set_promiscuous_mode(local,
					      wpan_dev->promiscuous_mode);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_AFILT) {
		rc = drv_set_pan_id(local, wpan_dev->pan_id);
		if (rc < 0)
			goto out;

		rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
		if (rc < 0)
			goto out;

		rc = drv_set_short_addr(local, wpan_dev->short_addr);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_LBT) {
		rc = drv_set_lbt_mode(local, wpan_dev->lbt);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
		rc = drv_set_csma_params(local, wpan_dev->min_be,
					 wpan_dev->max_be,
					 wpan_dev->csma_retries);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
		rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
		if (rc < 0)
			goto out;
	}

	mutex_unlock(&phy->pib_lock);
	return 0;

out:
	mutex_unlock(&phy->pib_lock);
	return rc;
}

static int mac802154_slave_close(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct ieee802154_local *local = sdata->local;

	ASSERT_RTNL();

	hrtimer_cancel(&local->ifs_timer);

	netif_stop_queue(dev);
	local->open_count--;

	clear_bit(SDATA_STATE_RUNNING, &sdata->state);

	if (!local->open_count)
		drv_stop(local);

	return 0;
}

static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
					 struct ieee802154_hdr *hdr,
					 const struct ieee802154_mac_cb *cb)
{
	struct ieee802154_llsec_params params;
	u8 level;

	mac802154_llsec_get_params(&sdata->sec, &params);

	if (!params.enabled && cb->secen_override && cb->secen)
		return -EINVAL;
	if (!params.enabled ||
	    (cb->secen_override && !cb->secen) ||
	    !params.out_level)
		return 0;
	if (cb->seclevel_override && !cb->seclevel)
		return -EINVAL;

	level = cb->seclevel_override ? cb->seclevel : params.out_level;

	hdr->fc.security_enabled = 1;
	hdr->sec.level = level;
	hdr->sec.key_id_mode = params.out_key.mode;
	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
		hdr->sec.short_src = params.out_key.short_source;
	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
		hdr->sec.extended_src = params.out_key.extended_source;
	hdr->sec.key_id = params.out_key.id;

	return 0;
}

static int mac802154_header_create(struct sk_buff *skb,
				   struct net_device *dev,
				   unsigned short type,
				   const void *daddr,
				   const void *saddr,
				   unsigned len)
{
	struct ieee802154_hdr hdr;
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	struct ieee802154_mac_cb *cb = mac_cb(skb);
	int hlen;

	if (!daddr)
		return -EINVAL;

	memset(&hdr.fc, 0, sizeof(hdr.fc));
	hdr.fc.type = cb->type;
	hdr.fc.security_enabled = cb->secen;
	hdr.fc.ack_request = cb->ackreq;
	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);

	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
		return -EINVAL;

	if (!saddr) {
		spin_lock_bh(&sdata->mib_lock);

		if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
		    wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
		    wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
			hdr.source.mode = IEEE802154_ADDR_LONG;
			hdr.source.extended_addr = wpan_dev->extended_addr;
		} else {
			hdr.source.mode = IEEE802154_ADDR_SHORT;
			hdr.source.short_addr = wpan_dev->short_addr;
		}

		hdr.source.pan_id = wpan_dev->pan_id;

		spin_unlock_bh(&sdata->mib_lock);
	} else {
		hdr.source = *(const struct ieee802154_addr *)saddr;
	}

	hdr.dest = *(const struct ieee802154_addr *)daddr;

	hlen = ieee802154_hdr_push(skb, &hdr);
	if (hlen < 0)
		return -EINVAL;

	skb_reset_mac_header(skb);
	skb->mac_len = hlen;

	if (len > ieee802154_max_payload(&hdr))
		return -EMSGSIZE;

	return hlen;
}

static int
mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
{
	struct ieee802154_hdr hdr;
	struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;

	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
		pr_debug("malformed packet\n");
		return 0;
	}

	*addr = hdr.source;
	return sizeof(*addr);
}

static struct header_ops mac802154_header_ops = {
	.create		= mac802154_header_create,
	.parse		= mac802154_header_parse,
};

static const struct net_device_ops mac802154_wpan_ops = {
	.ndo_open		= mac802154_wpan_open,
	.ndo_stop		= mac802154_slave_close,
	.ndo_start_xmit		= ieee802154_subif_start_xmit,
	.ndo_do_ioctl		= mac802154_wpan_ioctl,
	.ndo_set_mac_address	= mac802154_wpan_mac_addr,
};

static const struct net_device_ops mac802154_monitor_ops = {
	.ndo_open		= mac802154_wpan_open,
	.ndo_stop		= mac802154_slave_close,
	.ndo_start_xmit		= ieee802154_monitor_start_xmit,
};

static void mac802154_wpan_free(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	mac802154_llsec_destroy(&sdata->sec);

	free_netdev(dev);
}

static void ieee802154_if_setup(struct net_device *dev)
{
	dev->addr_len		= IEEE802154_EXTENDED_ADDR_LEN;
	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);

	dev->hard_header_len	= MAC802154_FRAME_HARD_HEADER_LEN;
	dev->needed_tailroom	= 2 + 16; /* FCS + MIC */
	dev->mtu		= IEEE802154_MTU;
	dev->tx_queue_len	= 300;
	dev->flags		= IFF_NOARP | IFF_BROADCAST;
}

static int
ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
		       enum nl802154_iftype type)
{
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;

	/* set some type-dependent values */
	sdata->vif.type = type;
	sdata->wpan_dev.iftype = type;

	get_random_bytes(&wpan_dev->bsn, 1);
	get_random_bytes(&wpan_dev->dsn, 1);

	/* defaults per 802.15.4-2011 */
	wpan_dev->min_be = 3;
	wpan_dev->max_be = 5;
	wpan_dev->csma_retries = 4;
	/* for compatibility, actual default is 3 */
	wpan_dev->frame_retries = -1;

	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);

	switch (type) {
	case NL802154_IFTYPE_NODE:
		ieee802154_be64_to_le64(&wpan_dev->extended_addr,
					sdata->dev->dev_addr);

		sdata->dev->header_ops = &mac802154_header_ops;
		sdata->dev->destructor = mac802154_wpan_free;
		sdata->dev->netdev_ops = &mac802154_wpan_ops;
		sdata->dev->ml_priv = &mac802154_mlme_wpan;
		wpan_dev->promiscuous_mode = false;

		spin_lock_init(&sdata->mib_lock);
		mutex_init(&sdata->sec_mtx);

		mac802154_llsec_init(&sdata->sec);
		break;
	case NL802154_IFTYPE_MONITOR:
		sdata->dev->destructor = free_netdev;
		sdata->dev->netdev_ops = &mac802154_monitor_ops;
		wpan_dev->promiscuous_mode = true;
		break;
	default:
		BUG();
	}

	return 0;
}

struct net_device *
ieee802154_if_add(struct ieee802154_local *local, const char *name,
		  enum nl802154_iftype type, __le64 extended_addr)
{
	struct net_device *ndev = NULL;
	struct ieee802154_sub_if_data *sdata = NULL;
	int ret = -ENOMEM;

	ASSERT_RTNL();

	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
			    NET_NAME_UNKNOWN, ieee802154_if_setup);
	if (!ndev)
		return ERR_PTR(-ENOMEM);

	ndev->needed_headroom = local->hw.extra_tx_headroom;

	ret = dev_alloc_name(ndev, ndev->name);
	if (ret < 0)
		goto err;

	ieee802154_le64_to_be64(ndev->perm_addr,
				&local->hw.phy->perm_extended_addr);
	switch (type) {
	case NL802154_IFTYPE_NODE:
		ndev->type = ARPHRD_IEEE802154;
		if (ieee802154_is_valid_extended_addr(extended_addr))
			ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
		else
			memcpy(ndev->dev_addr, ndev->perm_addr,
			       IEEE802154_EXTENDED_ADDR_LEN);
		break;
	case NL802154_IFTYPE_MONITOR:
		ndev->type = ARPHRD_IEEE802154_MONITOR;
		break;
	default:
		ret = -EINVAL;
		goto err;
	}

	/* TODO check this */
	SET_NETDEV_DEV(ndev, &local->phy->dev);
	sdata = netdev_priv(ndev);
	ndev->ieee802154_ptr = &sdata->wpan_dev;
	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	sdata->dev = ndev;
	sdata->wpan_dev.wpan_phy = local->hw.phy;
	sdata->local = local;

	/* setup type-dependent data */
	ret = ieee802154_setup_sdata(sdata, type);
	if (ret)
		goto err;

	if (ndev) {
		ret = register_netdevice(ndev);
		if (ret < 0)
			goto err;
	}

	mutex_lock(&local->iflist_mtx);
	list_add_tail_rcu(&sdata->list, &local->interfaces);
	mutex_unlock(&local->iflist_mtx);

	return ndev;

err:
	free_netdev(ndev);
	return ERR_PTR(ret);
}

void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
{
	ASSERT_RTNL();

	mutex_lock(&sdata->local->iflist_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->local->iflist_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

void ieee802154_remove_interfaces(struct ieee802154_local *local)
{
	struct ieee802154_sub_if_data *sdata, *tmp;

	mutex_lock(&local->iflist_mtx);
	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
		list_del(&sdata->list);

		unregister_netdevice(sdata->dev);
	}
	mutex_unlock(&local->iflist_mtx);
}

static int netdev_notify(struct notifier_block *nb,
			 unsigned long state, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct ieee802154_sub_if_data *sdata;

	if (state != NETDEV_CHANGENAME)
		return NOTIFY_DONE;

	if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
		return NOTIFY_DONE;

	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
		return NOTIFY_DONE;

	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	memcpy(sdata->name, dev->name, IFNAMSIZ);

	return NOTIFY_OK;
}

static struct notifier_block mac802154_netdev_notifier = {
	.notifier_call = netdev_notify,
};

int ieee802154_iface_init(void)
{
	return register_netdevice_notifier(&mac802154_netdev_notifier);
}

void ieee802154_iface_exit(void)
{
	unregister_netdevice_notifier(&mac802154_netdev_notifier);
}
Commit	Line	Data
32bad7e3	1	/*
	2	* Copyright 2007-2012 Siemens AG
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
32bad7e3	13	* Written by:
	14	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	15	* Sergey Lapin <slapin@ossfans.org>
	16	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	17	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	18	*/
	19
	20	#include <linux/netdevice.h>
	21	#include <linux/module.h>
	22	#include <linux/if_arp.h>
4ca24aca	23	#include <linux/ieee802154.h>
32bad7e3	24
944742a3	25	#include <net/nl802154.h>
32bad7e3	26	#include <net/mac802154.h>
32bad7e3	27	#include <net/ieee802154_netdev.h>
5ad60d36	28	#include <net/cfg802154.h>
32bad7e3	29
0f1556bc	30	#include "ieee802154_i.h"
59cb300f	31	#include "driver-ops.h"
32bad7e3	32
9b0bb4a8 PB	33	static int mac802154_wpan_update_llsec(struct net_device *dev)
9b0bb4a8 PB	34	{
59d19cd7	35	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
9b0bb4a8	36	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
863e88f2	37	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
9b0bb4a8 PB	38	int rc = 0;
	39
	40	if (ops->llsec) {
	41	struct ieee802154_llsec_params params;
	42	int changed = 0;
	43
863e88f2	44	params.pan_id = wpan_dev->pan_id;
9b0bb4a8 PB	45	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
9b0bb4a8 PB	46
863e88f2	47	params.hwaddr = wpan_dev->extended_addr;
9b0bb4a8 PB	48	changed \|= IEEE802154_LLSEC_PARAM_HWADDR;
	49
	50	rc = ops->llsec->set_params(dev, &params, changed);
	51	}
	52
	53	return rc;
	54	}
	55
32bad7e3	56	static int
	57	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	58	{
59d19cd7	59	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	60	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32bad7e3	61	struct sockaddr_ieee802154 *sa =
	62	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	63	int err = -ENOIOCTLCMD;
	64
f7cb96f1 AA	65	ASSERT_RTNL();
f7cb96f1 AA	66
036562f9	67	spin_lock_bh(&sdata->mib_lock);
32bad7e3	68
	69	switch (cmd) {
	70	case SIOCGIFADDR:
b70ab2e8 PB	71	{
	72	u16 pan_id, short_addr;
	73
863e88f2 AA	74	pan_id = le16_to_cpu(wpan_dev->pan_id);
863e88f2 AA	75	short_addr = le16_to_cpu(wpan_dev->short_addr);
b70ab2e8 PB	76	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
b70ab2e8 PB	77	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	78	err = -EADDRNOTAVAIL;
	79	break;
	80	}
	81
	82	sa->family = AF_IEEE802154;
	83	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	84	sa->addr.pan_id = pan_id;
b70ab2e8 PB	85	sa->addr.short_addr = short_addr;
32bad7e3	86
	87	err = 0;
	88	break;
b70ab2e8	89	}
32bad7e3	90	case SIOCSIFADDR:
f7cb96f1 AA	91	if (netif_running(dev)) {
	92	spin_unlock_bh(&sdata->mib_lock);
	93	return -EBUSY;
	94	}
	95
32bad7e3	96	dev_warn(&dev->dev,
9b13494c	97	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
32bad7e3	98	if (sa->family != AF_IEEE802154 \|\|
	99	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	100	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	101	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	102	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	103	err = -EINVAL;
	104	break;
	105	}
	106
863e88f2 AA	107	wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
863e88f2 AA	108	wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	109
9b0bb4a8	110	err = mac802154_wpan_update_llsec(dev);
32bad7e3	111	break;
	112	}
	113
036562f9	114	spin_unlock_bh(&sdata->mib_lock);
32bad7e3	115	return err;
	116	}
	117
	118	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	119	{
776e59de	120	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	121	struct sockaddr *addr = p;
ea7053c1	122	__le64 extended_addr;
32bad7e3	123
	124	if (netif_running(dev))
	125	return -EBUSY;
	126
705cbbbe	127	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
ea7053c1 AA	128	if (!ieee802154_is_valid_extended_addr(extended_addr))
	129	return -EINVAL;
	130
32bad7e3	131	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
863e88f2	132	sdata->wpan_dev.extended_addr = extended_addr;
776e59de	133
9b0bb4a8	134	return mac802154_wpan_update_llsec(dev);
32bad7e3	135	}
32bad7e3	136
19ec690a AA	137	static int mac802154_slave_open(struct net_device *dev)
	138	{
	139	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	140	struct ieee802154_sub_if_data *subif;
	141	struct ieee802154_local *local = sdata->local;
	142	int res = 0;
	143
	144	ASSERT_RTNL();
	145
944742a3	146	if (sdata->vif.type == NL802154_IFTYPE_NODE) {
19ec690a AA	147	mutex_lock(&sdata->local->iflist_mtx);
19ec690a AA	148	list_for_each_entry(subif, &sdata->local->interfaces, list) {
7c118c1a AA	149	if (subif != sdata &&
7c118c1a AA	150	subif->vif.type == sdata->vif.type &&
0ea3da64	151	ieee802154_sdata_running(subif)) {
19ec690a AA	152	mutex_unlock(&sdata->local->iflist_mtx);
	153	return -EBUSY;
	154	}
	155	}
	156	mutex_unlock(&sdata->local->iflist_mtx);
	157	}
	158
0ea3da64	159	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	160
74457641	161	if (!local->open_count) {
59cb300f	162	res = drv_start(local);
19ec690a AA	163	WARN_ON(res);
	164	if (res)
	165	goto err;
	166	}
	167
74457641	168	local->open_count++;
19ec690a AA	169	netif_start_queue(dev);
	170	return 0;
	171	err:
0ea3da64 AA	172	/* might already be clear but that doesn't matter */
0ea3da64 AA	173	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	174
	175	return res;
	176	}
	177
6ef0023a	178	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	179	{
e462ded6 PB	180	int rc;
59d19cd7	181	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
59cb300f	182	struct ieee802154_local *local = sdata->local;
863e88f2	183	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
04e850fe	184	struct wpan_phy *phy = sdata->local->phy;
e462ded6 PB	185
	186	rc = mac802154_slave_open(dev);
	187	if (rc < 0)
	188	return rc;
	189
	190	mutex_lock(&phy->pib_lock);
	191
38130c31	192	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
863e88f2 AA	193	rc = drv_set_promiscuous_mode(local,
863e88f2 AA	194	wpan_dev->promiscuous_mode);
38130c31 AA	195	if (rc < 0)
	196	goto out;
	197	}
	198
776e59de	199	if (local->hw.flags & IEEE802154_HW_AFILT) {
863e88f2	200	rc = drv_set_pan_id(local, wpan_dev->pan_id);
50c79075 AA	201	if (rc < 0)
	202	goto out;
	203
863e88f2	204	rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
776e59de AA	205	if (rc < 0)
776e59de AA	206	goto out;
78b4bad1	207
863e88f2	208	rc = drv_set_short_addr(local, wpan_dev->short_addr);
78b4bad1 AA	209	if (rc < 0)
78b4bad1 AA	210	goto out;
776e59de AA	211	}
776e59de AA	212
a543c598	213	if (local->hw.flags & IEEE802154_HW_LBT) {
5fb3f026	214	rc = drv_set_lbt_mode(local, wpan_dev->lbt);
e462ded6 PB	215	if (rc < 0)
	216	goto out;
	217	}
	218
a543c598	219	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
5fb3f026 AA	220	rc = drv_set_csma_params(local, wpan_dev->min_be,
	221	wpan_dev->max_be,
	222	wpan_dev->csma_retries);
e462ded6 PB	223	if (rc < 0)
	224	goto out;
	225	}
	226
a543c598	227	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
5fb3f026	228	rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
e462ded6 PB	229	if (rc < 0)
	230	goto out;
	231	}
	232
	233	mutex_unlock(&phy->pib_lock);
	234	return 0;
	235
	236	out:
	237	mutex_unlock(&phy->pib_lock);
	238	return rc;
	239	}
	240
19ec690a AA	241	static int mac802154_slave_close(struct net_device *dev)
	242	{
	243	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	244	struct ieee802154_local *local = sdata->local;
	245
	246	ASSERT_RTNL();
	247
61f2dcba AA	248	hrtimer_cancel(&local->ifs_timer);
61f2dcba AA	249
19ec690a	250	netif_stop_queue(dev);
74457641	251	local->open_count--;
19ec690a	252
0ea3da64	253	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	254
74457641	255	if (!local->open_count)
59cb300f	256	drv_stop(local);
19ec690a AA	257
	258	return 0;
	259	}
	260
036562f9	261	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	262	struct ieee802154_hdr *hdr,
	263	const struct ieee802154_mac_cb *cb)
	264	{
	265	struct ieee802154_llsec_params params;
	266	u8 level;
	267
036562f9	268	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	269
	270	if (!params.enabled && cb->secen_override && cb->secen)
	271	return -EINVAL;
	272	if (!params.enabled \|\|
	273	(cb->secen_override && !cb->secen) \|\|
	274	!params.out_level)
	275	return 0;
	276	if (cb->seclevel_override && !cb->seclevel)
	277	return -EINVAL;
	278
	279	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	280
	281	hdr->fc.security_enabled = 1;
	282	hdr->sec.level = level;
	283	hdr->sec.key_id_mode = params.out_key.mode;
	284	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	285	hdr->sec.short_src = params.out_key.short_source;
	286	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	287	hdr->sec.extended_src = params.out_key.extended_source;
	288	hdr->sec.key_id = params.out_key.id;
	289
	290	return 0;
	291	}
	292
32bad7e3	293	static int mac802154_header_create(struct sk_buff *skb,
	294	struct net_device *dev,
	295	unsigned short type,
e6278d92 PB	296	const void *daddr,
e6278d92 PB	297	const void *saddr,
32bad7e3	298	unsigned len)
32bad7e3	299	{
e6278d92	300	struct ieee802154_hdr hdr;
59d19cd7	301	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	302	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32edc40a	303	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	304	int hlen;
32bad7e3	305
	306	if (!daddr)
	307	return -EINVAL;
	308
e6278d92	309	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	310	hdr.fc.type = cb->type;
	311	hdr.fc.security_enabled = cb->secen;
	312	hdr.fc.ack_request = cb->ackreq;
	313	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
32bad7e3	314
036562f9	315	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	316	return -EINVAL;
f30be4d5 PB	317
32bad7e3	318	if (!saddr) {
036562f9	319	spin_lock_bh(&sdata->mib_lock);
32bad7e3	320
863e88f2 AA	321	if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	322	wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	323	wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	324	hdr.source.mode = IEEE802154_ADDR_LONG;
863e88f2	325	hdr.source.extended_addr = wpan_dev->extended_addr;
32bad7e3	326	} else {
e6278d92	327	hdr.source.mode = IEEE802154_ADDR_SHORT;
863e88f2	328	hdr.source.short_addr = wpan_dev->short_addr;
32bad7e3	329	}
32bad7e3	330
863e88f2	331	hdr.source.pan_id = wpan_dev->pan_id;
32bad7e3	332
036562f9	333	spin_unlock_bh(&sdata->mib_lock);
e6278d92 PB	334	} else {
e6278d92 PB	335	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	336	}
32bad7e3	337
e6278d92	338	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	339
e6278d92 PB	340	hlen = ieee802154_hdr_push(skb, &hdr);
	341	if (hlen < 0)
	342	return -EINVAL;
32bad7e3	343
3e69162e	344	skb_reset_mac_header(skb);
e6278d92	345	skb->mac_len = hlen;
32bad7e3	346
8c84296f	347	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	348	return -EMSGSIZE;
d1d7358e PB	349
e6278d92	350	return hlen;
32bad7e3	351	}
	352
	353	static int
	354	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	355	{
e6278d92 PB	356	struct ieee802154_hdr hdr;
e6278d92 PB	357	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	358
e6278d92 PB	359	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	360	pr_debug("malformed packet\n");
	361	return 0;
32bad7e3	362	}
32bad7e3	363
e6278d92 PB	364	*addr = hdr.source;
e6278d92 PB	365	return sizeof(*addr);
32bad7e3	366	}
32bad7e3	367
32bad7e3	368	static struct header_ops mac802154_header_ops = {
	369	.create = mac802154_header_create,
	370	.parse = mac802154_header_parse,
	371	};
	372
	373	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	374	.ndo_open = mac802154_wpan_open,
32bad7e3	375	.ndo_stop = mac802154_slave_close,
e5e584fc	376	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	377	.ndo_do_ioctl = mac802154_wpan_ioctl,
	378	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	379	};
	380
b9ff77e5	381	static const struct net_device_ops mac802154_monitor_ops = {
38130c31	382	.ndo_open = mac802154_wpan_open,
b9ff77e5 AA	383	.ndo_stop = mac802154_slave_close,
	384	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	385	};
	386
f30be4d5 PB	387	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	388	{
59d19cd7	389	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	390
036562f9	391	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	392
	393	free_netdev(dev);
	394	}
	395
d5ae67ba	396	static void ieee802154_if_setup(struct net_device *dev)
32bad7e3	397	{
e57a8946 AA	398	dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
e57a8946 AA	399	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
32bad7e3	400
32bad7e3	401	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
f30be4d5	402	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	403	dev->mtu = IEEE802154_MTU;
e937f583	404	dev->tx_queue_len = 300;
32bad7e3	405	dev->flags = IFF_NOARP \| IFF_BROADCAST;
d5ae67ba	406	}
32bad7e3	407
d5ae67ba	408	static int
944742a3 AA	409	ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
944742a3 AA	410	enum nl802154_iftype type)
d5ae67ba	411	{
863e88f2 AA	412	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
863e88f2 AA	413
d5ae67ba	414	/* set some type-dependent values */
7c118c1a	415	sdata->vif.type = type;
190ac1ca	416	sdata->wpan_dev.iftype = type;
32bad7e3	417
863e88f2 AA	418	get_random_bytes(&wpan_dev->bsn, 1);
863e88f2 AA	419	get_random_bytes(&wpan_dev->dsn, 1);
32bad7e3	420
e462ded6	421	/* defaults per 802.15.4-2011 */
5fb3f026 AA	422	wpan_dev->min_be = 3;
	423	wpan_dev->max_be = 5;
	424	wpan_dev->csma_retries = 4;
036562f9	425	/* for compatibility, actual default is 3 */
5fb3f026	426	wpan_dev->frame_retries = -1;
e462ded6	427
863e88f2 AA	428	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
863e88f2 AA	429	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	430
d5ae67ba	431	switch (type) {
944742a3	432	case NL802154_IFTYPE_NODE:
b03c9ccc AA	433	ieee802154_be64_to_le64(&wpan_dev->extended_addr,
	434	sdata->dev->dev_addr);
	435
d5ae67ba AA	436	sdata->dev->header_ops = &mac802154_header_ops;
	437	sdata->dev->destructor = mac802154_wpan_free;
	438	sdata->dev->netdev_ops = &mac802154_wpan_ops;
	439	sdata->dev->ml_priv = &mac802154_mlme_wpan;
863e88f2	440	wpan_dev->promiscuous_mode = false;
986a8abf	441
d5ae67ba AA	442	spin_lock_init(&sdata->mib_lock);
d5ae67ba AA	443	mutex_init(&sdata->sec_mtx);
986a8abf	444
d5ae67ba AA	445	mac802154_llsec_init(&sdata->sec);
d5ae67ba AA	446	break;
944742a3	447	case NL802154_IFTYPE_MONITOR:
d5ae67ba AA	448	sdata->dev->destructor = free_netdev;
d5ae67ba AA	449	sdata->dev->netdev_ops = &mac802154_monitor_ops;
863e88f2	450	wpan_dev->promiscuous_mode = true;
d5ae67ba AA	451	break;
	452	default:
	453	BUG();
	454	}
986a8abf AA	455
	456	return 0;
	457	}
	458
	459	struct net_device *
	460	ieee802154_if_add(struct ieee802154_local local, const char name,
0e57547e	461	enum nl802154_iftype type, __le64 extended_addr)
986a8abf	462	{
d5ae67ba AA	463	struct net_device *ndev = NULL;
	464	struct ieee802154_sub_if_data *sdata = NULL;
	465	int ret = -ENOMEM;
	466
	467	ASSERT_RTNL();
	468
7c118c1a AA	469	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
7c118c1a AA	470	NET_NAME_UNKNOWN, ieee802154_if_setup);
d5ae67ba AA	471	if (!ndev)
	472	return ERR_PTR(-ENOMEM);
	473
	474	ndev->needed_headroom = local->hw.extra_tx_headroom;
	475
	476	ret = dev_alloc_name(ndev, ndev->name);
	477	if (ret < 0)
	478	goto err;
986a8abf	479
0e57547e AA	480	ieee802154_le64_to_be64(ndev->perm_addr,
0e57547e AA	481	&local->hw.phy->perm_extended_addr);
986a8abf	482	switch (type) {
944742a3	483	case NL802154_IFTYPE_NODE:
d5ae67ba	484	ndev->type = ARPHRD_IEEE802154;
0e57547e AA	485	if (ieee802154_is_valid_extended_addr(extended_addr))
	486	ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
	487	else
	488	memcpy(ndev->dev_addr, ndev->perm_addr,
	489	IEEE802154_EXTENDED_ADDR_LEN);
986a8abf	490	break;
944742a3	491	case NL802154_IFTYPE_MONITOR:
d5ae67ba	492	ndev->type = ARPHRD_IEEE802154_MONITOR;
986a8abf	493	break;
d5ae67ba AA	494	default:
	495	ret = -EINVAL;
	496	goto err;
986a8abf	497	}
d5ae67ba AA	498
	499	/* TODO check this */
	500	SET_NETDEV_DEV(ndev, &local->phy->dev);
	501	sdata = netdev_priv(ndev);
	502	ndev->ieee802154_ptr = &sdata->wpan_dev;
	503	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	504	sdata->dev = ndev;
	505	sdata->wpan_dev.wpan_phy = local->hw.phy;
	506	sdata->local = local;
	507
	508	/* setup type-dependent data */
	509	ret = ieee802154_setup_sdata(sdata, type);
	510	if (ret)
986a8abf AA	511	goto err;
986a8abf AA	512
d5ae67ba AA	513	if (ndev) {
	514	ret = register_netdevice(ndev);
	515	if (ret < 0)
	516	goto err;
	517	}
	518
	519	mutex_lock(&local->iflist_mtx);
	520	list_add_tail_rcu(&sdata->list, &local->interfaces);
	521	mutex_unlock(&local->iflist_mtx);
986a8abf	522
d5ae67ba	523	return ndev;
986a8abf	524
986a8abf	525	err:
d5ae67ba AA	526	free_netdev(ndev);
d5ae67ba AA	527	return ERR_PTR(ret);
986a8abf AA	528	}
986a8abf AA	529
b210b187 AA	530	void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
	531	{
	532	ASSERT_RTNL();
	533
	534	mutex_lock(&sdata->local->iflist_mtx);
	535	list_del_rcu(&sdata->list);
	536	mutex_unlock(&sdata->local->iflist_mtx);
	537
	538	synchronize_rcu();
	539	unregister_netdevice(sdata->dev);
	540	}
592dfbfc AA	541
	542	void ieee802154_remove_interfaces(struct ieee802154_local *local)
	543	{
d14e1c71	544	struct ieee802154_sub_if_data sdata, tmp;
592dfbfc	545
2789e629	546	mutex_lock(&local->iflist_mtx);
d14e1c71	547	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
592dfbfc	548	list_del(&sdata->list);
592dfbfc AA	549
	550	unregister_netdevice(sdata->dev);
	551	}
2789e629	552	mutex_unlock(&local->iflist_mtx);
592dfbfc	553	}
be4fd8e5 AA	554
	555	static int netdev_notify(struct notifier_block *nb,
	556	unsigned long state, void *ptr)
	557	{
	558	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	559	struct ieee802154_sub_if_data *sdata;
	560
	561	if (state != NETDEV_CHANGENAME)
	562	return NOTIFY_DONE;
	563
	564	if (!dev->ieee802154_ptr \|\| !dev->ieee802154_ptr->wpan_phy)
	565	return NOTIFY_DONE;
	566
	567	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
	568	return NOTIFY_DONE;
	569
	570	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	571	memcpy(sdata->name, dev->name, IFNAMSIZ);
	572
	573	return NOTIFY_OK;
	574	}
	575
	576	static struct notifier_block mac802154_netdev_notifier = {
	577	.notifier_call = netdev_notify,
	578	};
	579
	580	int ieee802154_iface_init(void)
	581	{
	582	return register_netdevice_notifier(&mac802154_netdev_notifier);
	583	}
	584
	585	void ieee802154_iface_exit(void)
	586	{
	587	unregister_netdevice_notifier(&mac802154_netdev_notifier);
	588	}