[deliverable/linux.git] / net / mac802154 / wpan.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.
 *
 * 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();
}
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	*
	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*
	17	* Written by:
	18	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	19	* Sergey Lapin <slapin@ossfans.org>
	20	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	21	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	22	*/
	23
	24	#include <linux/netdevice.h>
	25	#include <linux/module.h>
	26	#include <linux/if_arp.h>
	27
	28	#include <net/rtnetlink.h>
	29	#include <linux/nl802154.h>
	30	#include <net/af_ieee802154.h>
	31	#include <net/mac802154.h>
	32	#include <net/ieee802154_netdev.h>
	33	#include <net/ieee802154.h>
	34	#include <net/wpan-phy.h>
	35
	36	#include "mac802154.h"
	37
32bad7e3	38	static int
	39	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	40	{
	41	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	42	struct sockaddr_ieee802154 *sa =
	43	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	44	int err = -ENOIOCTLCMD;
	45
	46	spin_lock_bh(&priv->mib_lock);
	47
	48	switch (cmd) {
	49	case SIOCGIFADDR:
b70ab2e8 PB	50	{
	51	u16 pan_id, short_addr;
	52
	53	pan_id = le16_to_cpu(priv->pan_id);
	54	short_addr = le16_to_cpu(priv->short_addr);
	55	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
	56	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	57	err = -EADDRNOTAVAIL;
	58	break;
	59	}
	60
	61	sa->family = AF_IEEE802154;
	62	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	63	sa->addr.pan_id = pan_id;
b70ab2e8 PB	64	sa->addr.short_addr = short_addr;
32bad7e3	65
	66	err = 0;
	67	break;
b70ab2e8	68	}
32bad7e3	69	case SIOCSIFADDR:
	70	dev_warn(&dev->dev,
	71	"Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\n");
	72	if (sa->family != AF_IEEE802154 \|\|
	73	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	74	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	75	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	76	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	77	err = -EINVAL;
	78	break;
	79	}
	80
b70ab2e8 PB	81	priv->pan_id = cpu_to_le16(sa->addr.pan_id);
b70ab2e8 PB	82	priv->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	83
	84	err = 0;
	85	break;
	86	}
	87
	88	spin_unlock_bh(&priv->mib_lock);
	89	return err;
	90	}
	91
	92	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	93	{
	94	struct sockaddr *addr = p;
	95
	96	if (netif_running(dev))
	97	return -EBUSY;
	98
	99	/* FIXME: validate addr */
	100	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	101	mac802154_dev_set_ieee_addr(dev);
	102	return 0;
	103	}
	104
	105	static int mac802154_header_create(struct sk_buff *skb,
	106	struct net_device *dev,
	107	unsigned short type,
e6278d92 PB	108	const void *daddr,
e6278d92 PB	109	const void *saddr,
32bad7e3	110	unsigned len)
32bad7e3	111	{
e6278d92	112	struct ieee802154_hdr hdr;
32bad7e3	113	struct mac802154_sub_if_data *priv = netdev_priv(dev);
e6278d92	114	int hlen;
32bad7e3	115
	116	if (!daddr)
	117	return -EINVAL;
	118
e6278d92 PB	119	memset(&hdr.fc, 0, sizeof(hdr.fc));
	120	hdr.fc.type = mac_cb_type(skb);
	121	hdr.fc.security_enabled = mac_cb_is_secen(skb);
	122	hdr.fc.ack_request = mac_cb_is_ackreq(skb);
32bad7e3	123
	124	if (!saddr) {
	125	spin_lock_bh(&priv->mib_lock);
	126
b70ab2e8 PB	127	if (priv->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	128	priv->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	129	priv->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92 PB	130	hdr.source.mode = IEEE802154_ADDR_LONG;
e6278d92 PB	131	hdr.source.extended_addr = priv->extended_addr;
32bad7e3	132	} else {
e6278d92 PB	133	hdr.source.mode = IEEE802154_ADDR_SHORT;
e6278d92 PB	134	hdr.source.short_addr = priv->short_addr;
32bad7e3	135	}
32bad7e3	136
e6278d92	137	hdr.source.pan_id = priv->pan_id;
32bad7e3	138
32bad7e3	139	spin_unlock_bh(&priv->mib_lock);
e6278d92 PB	140	} else {
e6278d92 PB	141	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	142	}
32bad7e3	143
e6278d92	144	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	145
e6278d92 PB	146	hlen = ieee802154_hdr_push(skb, &hdr);
	147	if (hlen < 0)
	148	return -EINVAL;
32bad7e3	149
3e69162e	150	skb_reset_mac_header(skb);
e6278d92	151	skb->mac_len = hlen;
32bad7e3	152
e6278d92	153	return hlen;
32bad7e3	154	}
	155
	156	static int
	157	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	158	{
e6278d92 PB	159	struct ieee802154_hdr hdr;
e6278d92 PB	160	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	161
e6278d92 PB	162	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	163	pr_debug("malformed packet\n");
	164	return 0;
32bad7e3	165	}
32bad7e3	166
e6278d92 PB	167	*addr = hdr.source;
e6278d92 PB	168	return sizeof(*addr);
32bad7e3	169	}
	170
	171	static netdev_tx_t
	172	mac802154_wpan_xmit(struct sk_buff skb, struct net_device dev)
	173	{
	174	struct mac802154_sub_if_data *priv;
	175	u8 chan, page;
	176
	177	priv = netdev_priv(dev);
	178
	179	spin_lock_bh(&priv->mib_lock);
	180	chan = priv->chan;
	181	page = priv->page;
	182	spin_unlock_bh(&priv->mib_lock);
	183
	184	if (chan == MAC802154_CHAN_NONE \|\|
	185	page >= WPAN_NUM_PAGES \|\|
fcefbe9f AO	186	chan >= WPAN_NUM_CHANNELS) {
fcefbe9f AO	187	kfree_skb(skb);
32bad7e3	188	return NETDEV_TX_OK;
fcefbe9f	189	}
32bad7e3	190
	191	skb->skb_iif = dev->ifindex;
	192	dev->stats.tx_packets++;
	193	dev->stats.tx_bytes += skb->len;
	194
	195	return mac802154_tx(priv->hw, skb, page, chan);
	196	}
	197
	198	static struct header_ops mac802154_header_ops = {
	199	.create = mac802154_header_create,
	200	.parse = mac802154_header_parse,
	201	};
	202
	203	static const struct net_device_ops mac802154_wpan_ops = {
	204	.ndo_open = mac802154_slave_open,
	205	.ndo_stop = mac802154_slave_close,
	206	.ndo_start_xmit = mac802154_wpan_xmit,
	207	.ndo_do_ioctl = mac802154_wpan_ioctl,
	208	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	209	};
	210
	211	void mac802154_wpan_setup(struct net_device *dev)
	212	{
	213	struct mac802154_sub_if_data *priv;
	214
	215	dev->addr_len = IEEE802154_ADDR_LEN;
	216	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
	217
	218	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
	219	dev->header_ops = &mac802154_header_ops;
	220	dev->needed_tailroom = 2; /* FCS */
	221	dev->mtu = IEEE802154_MTU;
e937f583	222	dev->tx_queue_len = 300;
32bad7e3	223	dev->type = ARPHRD_IEEE802154;
	224	dev->flags = IFF_NOARP \| IFF_BROADCAST;
	225	dev->watchdog_timeo = 0;
	226
	227	dev->destructor = free_netdev;
	228	dev->netdev_ops = &mac802154_wpan_ops;
	229	dev->ml_priv = &mac802154_mlme_wpan;
	230
	231	priv = netdev_priv(dev);
	232	priv->type = IEEE802154_DEV_WPAN;
	233
	234	priv->chan = MAC802154_CHAN_NONE;
	235	priv->page = 0;
	236
	237	spin_lock_init(&priv->mib_lock);
	238
	239	get_random_bytes(&priv->bsn, 1);
	240	get_random_bytes(&priv->dsn, 1);
	241
b70ab2e8 PB	242	priv->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
b70ab2e8 PB	243	priv->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
32bad7e3	244	}
	245
	246	static int mac802154_process_data(struct net_device dev, struct sk_buff skb)
	247	{
5ff3fec6	248	return netif_rx_ni(skb);
32bad7e3	249	}
	250
	251	static int
	252	mac802154_subif_frame(struct mac802154_sub_if_data sdata, struct sk_buff skb)
	253	{
ae531b94	254	__le16 span, sshort;
b70ab2e8	255
32bad7e3	256	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);
	257
	258	spin_lock_bh(&sdata->mib_lock);
	259
ae531b94 PB	260	span = sdata->pan_id;
ae531b94 PB	261	sshort = sdata->short_addr;
b70ab2e8	262
ae531b94	263	switch (mac_cb(skb)->dest.mode) {
32bad7e3	264	case IEEE802154_ADDR_NONE:
ae531b94	265	if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE)
32bad7e3	266	/* FIXME: check if we are PAN coordinator */
	267	skb->pkt_type = PACKET_OTHERHOST;
	268	else
	269	/* ACK comes with both addresses empty */
	270	skb->pkt_type = PACKET_HOST;
	271	break;
	272	case IEEE802154_ADDR_LONG:
ae531b94 PB	273	if (mac_cb(skb)->dest.pan_id != span &&
ae531b94 PB	274	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
32bad7e3	275	skb->pkt_type = PACKET_OTHERHOST;
ae531b94	276	else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr)
32bad7e3	277	skb->pkt_type = PACKET_HOST;
	278	else
	279	skb->pkt_type = PACKET_OTHERHOST;
	280	break;
	281	case IEEE802154_ADDR_SHORT:
ae531b94 PB	282	if (mac_cb(skb)->dest.pan_id != span &&
ae531b94 PB	283	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
32bad7e3	284	skb->pkt_type = PACKET_OTHERHOST;
ae531b94	285	else if (mac_cb(skb)->dest.short_addr == sshort)
32bad7e3	286	skb->pkt_type = PACKET_HOST;
ae531b94 PB	287	else if (mac_cb(skb)->dest.short_addr ==
ae531b94 PB	288	cpu_to_le16(IEEE802154_ADDR_BROADCAST))
32bad7e3	289	skb->pkt_type = PACKET_BROADCAST;
	290	else
	291	skb->pkt_type = PACKET_OTHERHOST;
	292	break;
	293	default:
	294	break;
	295	}
	296
	297	spin_unlock_bh(&sdata->mib_lock);
	298
	299	skb->dev = sdata->dev;
	300
	301	sdata->dev->stats.rx_packets++;
	302	sdata->dev->stats.rx_bytes += skb->len;
	303
	304	switch (mac_cb_type(skb)) {
	305	case IEEE802154_FC_TYPE_DATA:
	306	return mac802154_process_data(sdata->dev, skb);
	307	default:
2cc33c7e WC	308	pr_warn("ieee802154: bad frame received (type = %d)\n",
2cc33c7e WC	309	mac_cb_type(skb));
32bad7e3	310	kfree_skb(skb);
	311	return NET_RX_DROP;
	312	}
	313	}
	314
e6278d92 PB	315	static void mac802154_print_addr(const char *name,
e6278d92 PB	316	const struct ieee802154_addr *addr)
32bad7e3	317	{
e6278d92 PB	318	if (addr->mode == IEEE802154_ADDR_NONE)
e6278d92 PB	319	pr_debug("%s not present\n", name);
32bad7e3	320
e6278d92 PB	321	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
	322	if (addr->mode == IEEE802154_ADDR_SHORT) {
	323	pr_debug("%s is short: %04x\n", name,
	324	le16_to_cpu(addr->short_addr));
	325	} else {
	326	u64 hw = swab64((__force u64) addr->extended_addr);
32bad7e3	327
e6278d92 PB	328	pr_debug("%s is hardware: %8phC\n", name, &hw);
	329	}
	330	}
32bad7e3	331
e6278d92 PB	332	static int mac802154_parse_frame_start(struct sk_buff *skb)
e6278d92 PB	333	{
e6278d92	334	int hlen;
ae531b94	335	struct ieee802154_hdr hdr;
32bad7e3	336
e6278d92 PB	337	hlen = ieee802154_hdr_pull(skb, &hdr);
	338	if (hlen < 0)
	339	return -EINVAL;
32bad7e3	340
e6278d92	341	skb->mac_len = hlen;
32bad7e3	342
e6278d92 PB	343	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr.fc),
e6278d92 PB	344	hdr.seq);
32bad7e3	345
e6278d92	346	mac_cb(skb)->flags = hdr.fc.type;
32bad7e3	347
e6278d92 PB	348	if (hdr.fc.ack_request)
	349	mac_cb(skb)->flags \|= MAC_CB_FLAG_ACKREQ;
	350	if (hdr.fc.security_enabled)
	351	mac_cb(skb)->flags \|= MAC_CB_FLAG_SECEN;
32bad7e3	352
e6278d92 PB	353	mac802154_print_addr("destination", &hdr.dest);
e6278d92 PB	354	mac802154_print_addr("source", &hdr.source);
32bad7e3	355
ae531b94 PB	356	mac_cb(skb)->source = hdr.source;
	357	mac_cb(skb)->dest = hdr.dest;
	358
e6278d92 PB	359	if (hdr.fc.security_enabled) {
e6278d92 PB	360	u64 key;
32bad7e3	361
e6278d92	362	pr_debug("seclevel %i\n", hdr.sec.level);
32bad7e3	363
e6278d92 PB	364	switch (hdr.sec.key_id_mode) {
	365	case IEEE802154_SCF_KEY_IMPLICIT:
	366	pr_debug("implicit key\n");
	367	break;
32bad7e3	368
e6278d92 PB	369	case IEEE802154_SCF_KEY_INDEX:
	370	pr_debug("key %02x\n", hdr.sec.key_id);
	371	break;
32bad7e3	372
e6278d92 PB	373	case IEEE802154_SCF_KEY_SHORT_INDEX:
	374	pr_debug("key %04x:%04x %02x\n",
	375	le32_to_cpu(hdr.sec.short_src) >> 16,
	376	le32_to_cpu(hdr.sec.short_src) & 0xffff,
	377	hdr.sec.key_id);
	378	break;
32bad7e3	379
e6278d92 PB	380	case IEEE802154_SCF_KEY_HW_INDEX:
	381	key = swab64((__force u64) hdr.sec.extended_src);
	382	pr_debug("key source %8phC %02x\n", &key,
	383	hdr.sec.key_id);
	384	break;
32bad7e3	385	}
e6278d92 PB	386
e6278d92 PB	387	return -EINVAL;
32bad7e3	388	}
	389
	390	return 0;
32bad7e3	391	}
	392
	393	void mac802154_wpans_rx(struct mac802154_priv priv, struct sk_buff skb)
	394	{
	395	int ret;
	396	struct sk_buff *sskb;
	397	struct mac802154_sub_if_data *sdata;
	398
	399	ret = mac802154_parse_frame_start(skb);
	400	if (ret) {
	401	pr_debug("got invalid frame\n");
	402	return;
	403	}
	404
	405	rcu_read_lock();
	406	list_for_each_entry_rcu(sdata, &priv->slaves, list) {
	407	if (sdata->type != IEEE802154_DEV_WPAN)
	408	continue;
	409
	410	sskb = skb_clone(skb, GFP_ATOMIC);
	411	if (sskb)
	412	mac802154_subif_frame(sdata, sskb);
	413	}
	414	rcu_read_unlock();
	415	}