net/mac802154/wpan.c - kernel/msm-4.19 - Gitiles

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

 #include <net/rtnetlink.h>
 #include <linux/nl802154.h>
 #include <net/af_ieee802154.h>
 #include <net/mac802154.h>
 #include <net/ieee802154_netdev.h>
 #include <net/ieee802154.h>
 #include <net/wpan-phy.h>

 #include "mac802154.h"

 static int
 mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
 	struct mac802154_sub_if_data *priv = netdev_priv(dev);
 	struct sockaddr_ieee802154 *sa =
 		(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
 	int err = -ENOIOCTLCMD;

 	spin_lock_bh(&priv->mib_lock);

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

 		pan_id = le16_to_cpu(priv->pan_id);
 		short_addr = le16_to_cpu(priv->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:
 		dev_warn(&dev->dev,
 			 "Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\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;
 		}

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

 		err = 0;
 		break;
 	}

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

 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
 {
 	struct sockaddr *addr = p;

 	if (netif_running(dev))
 		return -EBUSY;

 	/* FIXME: validate addr */
 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
 	mac802154_dev_set_ieee_addr(dev);
 	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 mac802154_sub_if_data *priv = netdev_priv(dev);
 	int hlen;

 	if (!daddr)
 		return -EINVAL;

 	memset(&hdr.fc, 0, sizeof(hdr.fc));
 	hdr.fc.type = mac_cb_type(skb);
 	hdr.fc.security_enabled = mac_cb_is_secen(skb);
 	hdr.fc.ack_request = mac_cb_is_ackreq(skb);

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

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

 		hdr.source.pan_id = priv->pan_id;

 		spin_unlock_bh(&priv->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;

 	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 netdev_tx_t
 mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct mac802154_sub_if_data *priv;
 	u8 chan, page;

 	priv = netdev_priv(dev);

 	spin_lock_bh(&priv->mib_lock);
 	chan = priv->chan;
 	page = priv->page;
 	spin_unlock_bh(&priv->mib_lock);

 	if (chan == MAC802154_CHAN_NONE ||
 	    page >= WPAN_NUM_PAGES ||
 	    chan >= WPAN_NUM_CHANNELS) {
 		kfree_skb(skb);
 		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);
 }

 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_slave_open,
 	.ndo_stop		= mac802154_slave_close,
 	.ndo_start_xmit		= mac802154_wpan_xmit,
 	.ndo_do_ioctl		= mac802154_wpan_ioctl,
 	.ndo_set_mac_address	= mac802154_wpan_mac_addr,
 };

 void mac802154_wpan_setup(struct net_device *dev)
 {
 	struct mac802154_sub_if_data *priv;

 	dev->addr_len		= IEEE802154_ADDR_LEN;
 	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);

 	dev->hard_header_len	= MAC802154_FRAME_HARD_HEADER_LEN;
 	dev->header_ops		= &mac802154_header_ops;
 	dev->needed_tailroom	= 2; /* FCS */
 	dev->mtu		= IEEE802154_MTU;
 	dev->tx_queue_len	= 300;
 	dev->type		= ARPHRD_IEEE802154;
 	dev->flags		= IFF_NOARP | IFF_BROADCAST;
 	dev->watchdog_timeo	= 0;

 	dev->destructor		= free_netdev;
 	dev->netdev_ops		= &mac802154_wpan_ops;
 	dev->ml_priv		= &mac802154_mlme_wpan;

 	priv = netdev_priv(dev);
 	priv->type = IEEE802154_DEV_WPAN;

 	priv->chan = MAC802154_CHAN_NONE;
 	priv->page = 0;

 	spin_lock_init(&priv->mib_lock);

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

 	priv->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
 	priv->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
 }

 static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb)
 {
 	return netif_rx_ni(skb);
 }

 static int
 mac802154_subif_frame(struct mac802154_sub_if_data *sdata, struct sk_buff *skb)
 {
 	__le16 span, sshort;

 	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);

 	spin_lock_bh(&sdata->mib_lock);

 	span = sdata->pan_id;
 	sshort = sdata->short_addr;

 	switch (mac_cb(skb)->dest.mode) {
 	case IEEE802154_ADDR_NONE:
 		if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE)
 			/* FIXME: check if we are PAN coordinator */
 			skb->pkt_type = PACKET_OTHERHOST;
 		else
 			/* ACK comes with both addresses empty */
 			skb->pkt_type = PACKET_HOST;
 		break;
 	case IEEE802154_ADDR_LONG:
 		if (mac_cb(skb)->dest.pan_id != span &&
 		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
 			skb->pkt_type = PACKET_OTHERHOST;
 		else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr)
 			skb->pkt_type = PACKET_HOST;
 		else
 			skb->pkt_type = PACKET_OTHERHOST;
 		break;
 	case IEEE802154_ADDR_SHORT:
 		if (mac_cb(skb)->dest.pan_id != span &&
 		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
 			skb->pkt_type = PACKET_OTHERHOST;
 		else if (mac_cb(skb)->dest.short_addr == sshort)
 			skb->pkt_type = PACKET_HOST;
 		else if (mac_cb(skb)->dest.short_addr ==
 			  cpu_to_le16(IEEE802154_ADDR_BROADCAST))
 			skb->pkt_type = PACKET_BROADCAST;
 		else
 			skb->pkt_type = PACKET_OTHERHOST;
 		break;
 	default:
 		break;
 	}

 	spin_unlock_bh(&sdata->mib_lock);

 	skb->dev = sdata->dev;

 	sdata->dev->stats.rx_packets++;
 	sdata->dev->stats.rx_bytes += skb->len;

 	switch (mac_cb_type(skb)) {
 	case IEEE802154_FC_TYPE_DATA:
 		return mac802154_process_data(sdata->dev, skb);
 	default:
 		pr_warn("ieee802154: bad frame received (type = %d)\n",
 			mac_cb_type(skb));
 		kfree_skb(skb);
 		return NET_RX_DROP;
 	}
 }

 static void mac802154_print_addr(const char *name,
 				 const struct ieee802154_addr *addr)
 {
 	if (addr->mode == IEEE802154_ADDR_NONE)
 		pr_debug("%s not present\n", name);

 	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
 	if (addr->mode == IEEE802154_ADDR_SHORT) {
 		pr_debug("%s is short: %04x\n", name,
 			 le16_to_cpu(addr->short_addr));
 	} else {
 		u64 hw = swab64((__force u64) addr->extended_addr);

 		pr_debug("%s is hardware: %8phC\n", name, &hw);
 	}
 }

 static int mac802154_parse_frame_start(struct sk_buff *skb)
 {
 	int hlen;
 	struct ieee802154_hdr hdr;

 	hlen = ieee802154_hdr_pull(skb, &hdr);
 	if (hlen < 0)
 		return -EINVAL;

 	skb->mac_len = hlen;

 	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr.fc),
 		 hdr.seq);

 	mac_cb(skb)->flags = hdr.fc.type;

 	if (hdr.fc.ack_request)
 		mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ;
 	if (hdr.fc.security_enabled)
 		mac_cb(skb)->flags |= MAC_CB_FLAG_SECEN;

 	mac802154_print_addr("destination", &hdr.dest);
 	mac802154_print_addr("source", &hdr.source);

 	mac_cb(skb)->source = hdr.source;
 	mac_cb(skb)->dest = hdr.dest;

 	if (hdr.fc.security_enabled) {
 		u64 key;

 		pr_debug("seclevel %i\n", hdr.sec.level);

 		switch (hdr.sec.key_id_mode) {
 		case IEEE802154_SCF_KEY_IMPLICIT:
 			pr_debug("implicit key\n");
 			break;

 		case IEEE802154_SCF_KEY_INDEX:
 			pr_debug("key %02x\n", hdr.sec.key_id);
 			break;

 		case IEEE802154_SCF_KEY_SHORT_INDEX:
 			pr_debug("key %04x:%04x %02x\n",
 				 le32_to_cpu(hdr.sec.short_src) >> 16,
 				 le32_to_cpu(hdr.sec.short_src) & 0xffff,
 				 hdr.sec.key_id);
 			break;

 		case IEEE802154_SCF_KEY_HW_INDEX:
 			key = swab64((__force u64) hdr.sec.extended_src);
 			pr_debug("key source %8phC %02x\n", &key,
 				 hdr.sec.key_id);
 			break;
 		}

 		return -EINVAL;
 	}

 	return 0;
 }

 void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb)
 {
 	int ret;
 	struct sk_buff *sskb;
 	struct mac802154_sub_if_data *sdata;

 	ret = mac802154_parse_frame_start(skb);
 	if (ret) {
 		pr_debug("got invalid frame\n");
 		return;
 	}

 	rcu_read_lock();
 	list_for_each_entry_rcu(sdata, &priv->slaves, list) {
 		if (sdata->type != IEEE802154_DEV_WPAN)
 			continue;

 		sskb = skb_clone(skb, GFP_ATOMIC);
 		if (sskb)
 			mac802154_subif_frame(sdata, sskb);
 	}
 	rcu_read_unlock();
 }
	/*
	* 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.
	*
	* 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/module.h>
	#include <linux/if_arp.h>

	#include <net/rtnetlink.h>
	#include <linux/nl802154.h>
	#include <net/af_ieee802154.h>
	#include <net/mac802154.h>
	#include <net/ieee802154_netdev.h>
	#include <net/ieee802154.h>
	#include <net/wpan-phy.h>

	#include "mac802154.h"

	static int
	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct sockaddr_ieee802154 *sa =
	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	int err = -ENOIOCTLCMD;

	spin_lock_bh(&priv->mib_lock);

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

	pan_id = le16_to_cpu(priv->pan_id);
	short_addr = le16_to_cpu(priv->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:
	dev_warn(&dev->dev,
	"Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\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;
	}

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

	err = 0;
	break;
	}

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

	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	{
	struct sockaddr *addr = p;

	if (netif_running(dev))
	return -EBUSY;

	/* FIXME: validate addr */
	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	mac802154_dev_set_ieee_addr(dev);
	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 mac802154_sub_if_data *priv = netdev_priv(dev);
	int hlen;

	if (!daddr)
	return -EINVAL;

	memset(&hdr.fc, 0, sizeof(hdr.fc));
	hdr.fc.type = mac_cb_type(skb);
	hdr.fc.security_enabled = mac_cb_is_secen(skb);
	hdr.fc.ack_request = mac_cb_is_ackreq(skb);

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

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

	hdr.source.pan_id = priv->pan_id;

	spin_unlock_bh(&priv->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;

	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 netdev_tx_t
	mac802154_wpan_xmit(struct sk_buff skb, struct net_device dev)
	{
	struct mac802154_sub_if_data *priv;
	u8 chan, page;

	priv = netdev_priv(dev);

	spin_lock_bh(&priv->mib_lock);
	chan = priv->chan;
	page = priv->page;
	spin_unlock_bh(&priv->mib_lock);

	if (chan == MAC802154_CHAN_NONE \|\|
	page >= WPAN_NUM_PAGES \|\|
	chan >= WPAN_NUM_CHANNELS) {
	kfree_skb(skb);
	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);
	}

	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_slave_open,
	.ndo_stop = mac802154_slave_close,
	.ndo_start_xmit = mac802154_wpan_xmit,
	.ndo_do_ioctl = mac802154_wpan_ioctl,
	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	};

	void mac802154_wpan_setup(struct net_device *dev)
	{
	struct mac802154_sub_if_data *priv;

	dev->addr_len = IEEE802154_ADDR_LEN;
	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);

	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
	dev->header_ops = &mac802154_header_ops;
	dev->needed_tailroom = 2; /* FCS */
	dev->mtu = IEEE802154_MTU;
	dev->tx_queue_len = 300;
	dev->type = ARPHRD_IEEE802154;
	dev->flags = IFF_NOARP \| IFF_BROADCAST;
	dev->watchdog_timeo = 0;

	dev->destructor = free_netdev;
	dev->netdev_ops = &mac802154_wpan_ops;
	dev->ml_priv = &mac802154_mlme_wpan;

	priv = netdev_priv(dev);
	priv->type = IEEE802154_DEV_WPAN;

	priv->chan = MAC802154_CHAN_NONE;
	priv->page = 0;

	spin_lock_init(&priv->mib_lock);

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

	priv->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
	priv->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
	}

	static int mac802154_process_data(struct net_device dev, struct sk_buff skb)
	{
	return netif_rx_ni(skb);
	}

	static int
	mac802154_subif_frame(struct mac802154_sub_if_data sdata, struct sk_buff skb)
	{
	__le16 span, sshort;

	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);

	spin_lock_bh(&sdata->mib_lock);

	span = sdata->pan_id;
	sshort = sdata->short_addr;

	switch (mac_cb(skb)->dest.mode) {
	case IEEE802154_ADDR_NONE:
	if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE)
	/* FIXME: check if we are PAN coordinator */
	skb->pkt_type = PACKET_OTHERHOST;
	else
	/* ACK comes with both addresses empty */
	skb->pkt_type = PACKET_HOST;
	break;
	case IEEE802154_ADDR_LONG:
	if (mac_cb(skb)->dest.pan_id != span &&
	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
	skb->pkt_type = PACKET_OTHERHOST;
	else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr)
	skb->pkt_type = PACKET_HOST;
	else
	skb->pkt_type = PACKET_OTHERHOST;
	break;
	case IEEE802154_ADDR_SHORT:
	if (mac_cb(skb)->dest.pan_id != span &&
	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
	skb->pkt_type = PACKET_OTHERHOST;
	else if (mac_cb(skb)->dest.short_addr == sshort)
	skb->pkt_type = PACKET_HOST;
	else if (mac_cb(skb)->dest.short_addr ==
	cpu_to_le16(IEEE802154_ADDR_BROADCAST))
	skb->pkt_type = PACKET_BROADCAST;
	else
	skb->pkt_type = PACKET_OTHERHOST;
	break;
	default:
	break;
	}

	spin_unlock_bh(&sdata->mib_lock);

	skb->dev = sdata->dev;

	sdata->dev->stats.rx_packets++;
	sdata->dev->stats.rx_bytes += skb->len;

	switch (mac_cb_type(skb)) {
	case IEEE802154_FC_TYPE_DATA:
	return mac802154_process_data(sdata->dev, skb);
	default:
	pr_warn("ieee802154: bad frame received (type = %d)\n",
	mac_cb_type(skb));
	kfree_skb(skb);
	return NET_RX_DROP;
	}
	}

	static void mac802154_print_addr(const char *name,
	const struct ieee802154_addr *addr)
	{
	if (addr->mode == IEEE802154_ADDR_NONE)
	pr_debug("%s not present\n", name);

	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
	if (addr->mode == IEEE802154_ADDR_SHORT) {
	pr_debug("%s is short: %04x\n", name,
	le16_to_cpu(addr->short_addr));
	} else {
	u64 hw = swab64((__force u64) addr->extended_addr);

	pr_debug("%s is hardware: %8phC\n", name, &hw);
	}
	}

	static int mac802154_parse_frame_start(struct sk_buff *skb)
	{
	int hlen;
	struct ieee802154_hdr hdr;

	hlen = ieee802154_hdr_pull(skb, &hdr);
	if (hlen < 0)
	return -EINVAL;

	skb->mac_len = hlen;

	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr.fc),
	hdr.seq);

	mac_cb(skb)->flags = hdr.fc.type;

	if (hdr.fc.ack_request)
	mac_cb(skb)->flags \|= MAC_CB_FLAG_ACKREQ;
	if (hdr.fc.security_enabled)
	mac_cb(skb)->flags \|= MAC_CB_FLAG_SECEN;

	mac802154_print_addr("destination", &hdr.dest);
	mac802154_print_addr("source", &hdr.source);

	mac_cb(skb)->source = hdr.source;
	mac_cb(skb)->dest = hdr.dest;

	if (hdr.fc.security_enabled) {
	u64 key;

	pr_debug("seclevel %i\n", hdr.sec.level);

	switch (hdr.sec.key_id_mode) {
	case IEEE802154_SCF_KEY_IMPLICIT:
	pr_debug("implicit key\n");
	break;

	case IEEE802154_SCF_KEY_INDEX:
	pr_debug("key %02x\n", hdr.sec.key_id);
	break;

	case IEEE802154_SCF_KEY_SHORT_INDEX:
	pr_debug("key %04x:%04x %02x\n",
	le32_to_cpu(hdr.sec.short_src) >> 16,
	le32_to_cpu(hdr.sec.short_src) & 0xffff,
	hdr.sec.key_id);
	break;

	case IEEE802154_SCF_KEY_HW_INDEX:
	key = swab64((__force u64) hdr.sec.extended_src);
	pr_debug("key source %8phC %02x\n", &key,
	hdr.sec.key_id);
	break;
	}

	return -EINVAL;
	}

	return 0;
	}

	void mac802154_wpans_rx(struct mac802154_priv priv, struct sk_buff skb)
	{
	int ret;
	struct sk_buff *sskb;
	struct mac802154_sub_if_data *sdata;

	ret = mac802154_parse_frame_start(skb);
	if (ret) {
	pr_debug("got invalid frame\n");
	return;
	}

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &priv->slaves, list) {
	if (sdata->type != IEEE802154_DEV_WPAN)
	continue;

	sskb = skb_clone(skb, GFP_ATOMIC);
	if (sskb)
	mac802154_subif_frame(sdata, sskb);
	}
	rcu_read_unlock();
	}