[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_update_llsec(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
	int rc = 0;

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

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

		params.hwaddr = priv->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 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 = mac802154_wpan_update_llsec(dev);
		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 mac802154_wpan_update_llsec(dev);
}

int mac802154_set_mac_params(struct net_device *dev,
			     const struct ieee802154_mac_params *params)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);

	mutex_lock(&priv->hw->slaves_mtx);
	priv->mac_params = *params;
	mutex_unlock(&priv->hw->slaves_mtx);

	return 0;
}

void mac802154_get_mac_params(struct net_device *dev,
			      struct ieee802154_mac_params *params)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);

	mutex_lock(&priv->hw->slaves_mtx);
	*params = priv->mac_params;
	mutex_unlock(&priv->hw->slaves_mtx);
}

static int mac802154_wpan_open(struct net_device *dev)
{
	int rc;
	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	struct wpan_phy *phy = priv->hw->phy;

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

	mutex_lock(&phy->pib_lock);

	if (phy->set_txpower) {
		rc = phy->set_txpower(phy, priv->mac_params.transmit_power);
		if (rc < 0)
			goto out;
	}

	if (phy->set_lbt) {
		rc = phy->set_lbt(phy, priv->mac_params.lbt);
		if (rc < 0)
			goto out;
	}

	if (phy->set_cca_mode) {
		rc = phy->set_cca_mode(phy, priv->mac_params.cca_mode);
		if (rc < 0)
			goto out;
	}

	if (phy->set_cca_ed_level) {
		rc = phy->set_cca_ed_level(phy, priv->mac_params.cca_ed_level);
		if (rc < 0)
			goto out;
	}

	if (phy->set_csma_params) {
		rc = phy->set_csma_params(phy, priv->mac_params.min_be,
					  priv->mac_params.max_be,
					  priv->mac_params.csma_retries);
		if (rc < 0)
			goto out;
	}

	if (phy->set_frame_retries) {
		rc = phy->set_frame_retries(phy,
					    priv->mac_params.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_set_header_security(struct mac802154_sub_if_data *priv,
					 struct ieee802154_hdr *hdr,
					 const struct ieee802154_mac_cb *cb)
{
	struct ieee802154_llsec_params params;
	u8 level;

	mac802154_llsec_get_params(&priv->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 mac802154_sub_if_data *priv = netdev_priv(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(priv, &hdr, cb) < 0)
		return -EINVAL;

	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;

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

	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;
	}

	rc = mac802154_llsec_encrypt(&priv->sec, skb);
	if (rc) {
		pr_warn("encryption failed: %i\n", rc);
		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_wpan_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,
};

static void mac802154_wpan_free(struct net_device *dev)
{
	struct mac802154_sub_if_data *priv = netdev_priv(dev);

	mac802154_llsec_destroy(&priv->sec);

	free_netdev(dev);
}

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 + 16; /* FCS + MIC */
	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		= mac802154_wpan_free;
	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);
	mutex_init(&priv->sec_mtx);

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

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

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

	mac802154_llsec_init(&priv->sec);
}

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,
		      const struct ieee802154_hdr *hdr)
{
	__le16 span, sshort;
	int rc;

	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;

	rc = mac802154_llsec_decrypt(&sdata->sec, skb);
	if (rc) {
		pr_debug("decryption failed: %i\n", rc);
		kfree_skb(skb);
		return NET_RX_DROP;
	}

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

	switch (mac_cb(skb)->type) {
	case IEEE802154_FC_TYPE_DATA:
		return mac802154_process_data(sdata->dev, skb);
	default:
		pr_warn("ieee802154: bad frame received (type = %d)\n",
			mac_cb(skb)->type);
		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,
				       struct ieee802154_hdr *hdr)
{
	int hlen;
	struct ieee802154_mac_cb *cb = mac_cb_init(skb);

	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);

	cb->type = hdr->fc.type;
	cb->ackreq = hdr->fc.ack_request;
	cb->secen = hdr->fc.security_enabled;

	mac802154_print_addr("destination", &hdr->dest);
	mac802154_print_addr("source", &hdr->source);

	cb->source = hdr->source;
	cb->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 0;
}

void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb)
{
	int ret;
	struct mac802154_sub_if_data *sdata;
	struct ieee802154_hdr hdr;

	ret = mac802154_parse_frame_start(skb, &hdr);
	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 ||
		    !netif_running(sdata->dev))
			continue;

		mac802154_subif_frame(sdata, skb, &hdr);
		skb = NULL;
		break;
	}
	rcu_read_unlock();

	if (skb)
		kfree_skb(skb);
}
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
9b0bb4a8 PB	38	static int mac802154_wpan_update_llsec(struct net_device *dev)
	39	{
	40	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	41	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
	42	int rc = 0;
	43
	44	if (ops->llsec) {
	45	struct ieee802154_llsec_params params;
	46	int changed = 0;
	47
	48	params.pan_id = priv->pan_id;
	49	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
	50
	51	params.hwaddr = priv->extended_addr;
	52	changed \|= IEEE802154_LLSEC_PARAM_HWADDR;
	53
	54	rc = ops->llsec->set_params(dev, &params, changed);
	55	}
	56
	57	return rc;
	58	}
	59
32bad7e3	60	static int
	61	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	62	{
	63	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	64	struct sockaddr_ieee802154 *sa =
	65	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	66	int err = -ENOIOCTLCMD;
	67
	68	spin_lock_bh(&priv->mib_lock);
	69
	70	switch (cmd) {
	71	case SIOCGIFADDR:
b70ab2e8 PB	72	{
	73	u16 pan_id, short_addr;
	74
	75	pan_id = le16_to_cpu(priv->pan_id);
	76	short_addr = le16_to_cpu(priv->short_addr);
	77	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
	78	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	79	err = -EADDRNOTAVAIL;
	80	break;
	81	}
	82
	83	sa->family = AF_IEEE802154;
	84	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	85	sa->addr.pan_id = pan_id;
b70ab2e8 PB	86	sa->addr.short_addr = short_addr;
32bad7e3	87
	88	err = 0;
	89	break;
b70ab2e8	90	}
32bad7e3	91	case SIOCSIFADDR:
	92	dev_warn(&dev->dev,
	93	"Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\n");
	94	if (sa->family != AF_IEEE802154 \|\|
	95	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	96	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	97	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	98	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	99	err = -EINVAL;
	100	break;
	101	}
	102
b70ab2e8 PB	103	priv->pan_id = cpu_to_le16(sa->addr.pan_id);
b70ab2e8 PB	104	priv->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	105
9b0bb4a8	106	err = mac802154_wpan_update_llsec(dev);
32bad7e3	107	break;
	108	}
	109
	110	spin_unlock_bh(&priv->mib_lock);
	111	return err;
	112	}
	113
	114	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	115	{
	116	struct sockaddr *addr = p;
	117
	118	if (netif_running(dev))
	119	return -EBUSY;
	120
	121	/* FIXME: validate addr */
	122	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	123	mac802154_dev_set_ieee_addr(dev);
9b0bb4a8	124	return mac802154_wpan_update_llsec(dev);
32bad7e3	125	}
32bad7e3	126
e462ded6 PB	127	int mac802154_set_mac_params(struct net_device *dev,
	128	const struct ieee802154_mac_params *params)
	129	{
	130	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	131
	132	mutex_lock(&priv->hw->slaves_mtx);
	133	priv->mac_params = *params;
	134	mutex_unlock(&priv->hw->slaves_mtx);
	135
	136	return 0;
	137	}
	138
	139	void mac802154_get_mac_params(struct net_device *dev,
	140	struct ieee802154_mac_params *params)
	141	{
	142	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	143
	144	mutex_lock(&priv->hw->slaves_mtx);
	145	*params = priv->mac_params;
	146	mutex_unlock(&priv->hw->slaves_mtx);
	147	}
	148
6ef0023a	149	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	150	{
	151	int rc;
	152	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	153	struct wpan_phy *phy = priv->hw->phy;
	154
	155	rc = mac802154_slave_open(dev);
	156	if (rc < 0)
	157	return rc;
	158
	159	mutex_lock(&phy->pib_lock);
	160
	161	if (phy->set_txpower) {
	162	rc = phy->set_txpower(phy, priv->mac_params.transmit_power);
	163	if (rc < 0)
	164	goto out;
	165	}
	166
	167	if (phy->set_lbt) {
	168	rc = phy->set_lbt(phy, priv->mac_params.lbt);
	169	if (rc < 0)
	170	goto out;
	171	}
	172
	173	if (phy->set_cca_mode) {
	174	rc = phy->set_cca_mode(phy, priv->mac_params.cca_mode);
	175	if (rc < 0)
	176	goto out;
	177	}
	178
	179	if (phy->set_cca_ed_level) {
	180	rc = phy->set_cca_ed_level(phy, priv->mac_params.cca_ed_level);
	181	if (rc < 0)
	182	goto out;
	183	}
	184
	185	if (phy->set_csma_params) {
	186	rc = phy->set_csma_params(phy, priv->mac_params.min_be,
	187	priv->mac_params.max_be,
	188	priv->mac_params.csma_retries);
	189	if (rc < 0)
	190	goto out;
	191	}
	192
	193	if (phy->set_frame_retries) {
	194	rc = phy->set_frame_retries(phy,
	195	priv->mac_params.frame_retries);
	196	if (rc < 0)
	197	goto out;
	198	}
	199
	200	mutex_unlock(&phy->pib_lock);
	201	return 0;
	202
	203	out:
	204	mutex_unlock(&phy->pib_lock);
	205	return rc;
	206	}
	207
f30be4d5 PB	208	static int mac802154_set_header_security(struct mac802154_sub_if_data *priv,
	209	struct ieee802154_hdr *hdr,
	210	const struct ieee802154_mac_cb *cb)
	211	{
	212	struct ieee802154_llsec_params params;
	213	u8 level;
	214
	215	mac802154_llsec_get_params(&priv->sec, &params);
	216
	217	if (!params.enabled && cb->secen_override && cb->secen)
	218	return -EINVAL;
	219	if (!params.enabled \|\|
	220	(cb->secen_override && !cb->secen) \|\|
	221	!params.out_level)
	222	return 0;
	223	if (cb->seclevel_override && !cb->seclevel)
	224	return -EINVAL;
	225
	226	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	227
	228	hdr->fc.security_enabled = 1;
	229	hdr->sec.level = level;
	230	hdr->sec.key_id_mode = params.out_key.mode;
	231	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	232	hdr->sec.short_src = params.out_key.short_source;
	233	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	234	hdr->sec.extended_src = params.out_key.extended_source;
	235	hdr->sec.key_id = params.out_key.id;
	236
	237	return 0;
	238	}
	239
32bad7e3	240	static int mac802154_header_create(struct sk_buff *skb,
	241	struct net_device *dev,
	242	unsigned short type,
e6278d92 PB	243	const void *daddr,
e6278d92 PB	244	const void *saddr,
32bad7e3	245	unsigned len)
32bad7e3	246	{
e6278d92	247	struct ieee802154_hdr hdr;
32bad7e3	248	struct mac802154_sub_if_data *priv = netdev_priv(dev);
32edc40a	249	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	250	int hlen;
32bad7e3	251
	252	if (!daddr)
	253	return -EINVAL;
	254
e6278d92	255	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	256	hdr.fc.type = cb->type;
	257	hdr.fc.security_enabled = cb->secen;
	258	hdr.fc.ack_request = cb->ackreq;
	259	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
32bad7e3	260
f30be4d5 PB	261	if (mac802154_set_header_security(priv, &hdr, cb) < 0)
	262	return -EINVAL;
	263
32bad7e3	264	if (!saddr) {
	265	spin_lock_bh(&priv->mib_lock);
	266
b70ab2e8 PB	267	if (priv->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	268	priv->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	269	priv->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92 PB	270	hdr.source.mode = IEEE802154_ADDR_LONG;
e6278d92 PB	271	hdr.source.extended_addr = priv->extended_addr;
32bad7e3	272	} else {
e6278d92 PB	273	hdr.source.mode = IEEE802154_ADDR_SHORT;
e6278d92 PB	274	hdr.source.short_addr = priv->short_addr;
32bad7e3	275	}
32bad7e3	276
e6278d92	277	hdr.source.pan_id = priv->pan_id;
32bad7e3	278
32bad7e3	279	spin_unlock_bh(&priv->mib_lock);
e6278d92 PB	280	} else {
e6278d92 PB	281	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	282	}
32bad7e3	283
e6278d92	284	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	285
e6278d92 PB	286	hlen = ieee802154_hdr_push(skb, &hdr);
	287	if (hlen < 0)
	288	return -EINVAL;
32bad7e3	289
3e69162e	290	skb_reset_mac_header(skb);
e6278d92	291	skb->mac_len = hlen;
32bad7e3	292
8c84296f	293	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	294	return -EMSGSIZE;
d1d7358e PB	295
e6278d92	296	return hlen;
32bad7e3	297	}
	298
	299	static int
	300	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	301	{
e6278d92 PB	302	struct ieee802154_hdr hdr;
e6278d92 PB	303	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	304
e6278d92 PB	305	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	306	pr_debug("malformed packet\n");
	307	return 0;
32bad7e3	308	}
32bad7e3	309
e6278d92 PB	310	*addr = hdr.source;
e6278d92 PB	311	return sizeof(*addr);
32bad7e3	312	}
	313
	314	static netdev_tx_t
	315	mac802154_wpan_xmit(struct sk_buff skb, struct net_device dev)
	316	{
	317	struct mac802154_sub_if_data *priv;
	318	u8 chan, page;
f30be4d5	319	int rc;
32bad7e3	320
	321	priv = netdev_priv(dev);
	322
	323	spin_lock_bh(&priv->mib_lock);
	324	chan = priv->chan;
	325	page = priv->page;
	326	spin_unlock_bh(&priv->mib_lock);
	327
	328	if (chan == MAC802154_CHAN_NONE \|\|
	329	page >= WPAN_NUM_PAGES \|\|
fcefbe9f AO	330	chan >= WPAN_NUM_CHANNELS) {
fcefbe9f AO	331	kfree_skb(skb);
32bad7e3	332	return NETDEV_TX_OK;
fcefbe9f	333	}
32bad7e3	334
f30be4d5 PB	335	rc = mac802154_llsec_encrypt(&priv->sec, skb);
	336	if (rc) {
	337	pr_warn("encryption failed: %i\n", rc);
	338	kfree_skb(skb);
	339	return NETDEV_TX_OK;
	340	}
	341
32bad7e3	342	skb->skb_iif = dev->ifindex;
	343	dev->stats.tx_packets++;
	344	dev->stats.tx_bytes += skb->len;
	345
	346	return mac802154_tx(priv->hw, skb, page, chan);
	347	}
	348
	349	static struct header_ops mac802154_header_ops = {
	350	.create = mac802154_header_create,
	351	.parse = mac802154_header_parse,
	352	};
	353
	354	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	355	.ndo_open = mac802154_wpan_open,
32bad7e3	356	.ndo_stop = mac802154_slave_close,
	357	.ndo_start_xmit = mac802154_wpan_xmit,
	358	.ndo_do_ioctl = mac802154_wpan_ioctl,
	359	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	360	};
	361
f30be4d5 PB	362	static void mac802154_wpan_free(struct net_device *dev)
	363	{
	364	struct mac802154_sub_if_data *priv = netdev_priv(dev);
	365
	366	mac802154_llsec_destroy(&priv->sec);
	367
	368	free_netdev(dev);
	369	}
	370
32bad7e3	371	void mac802154_wpan_setup(struct net_device *dev)
	372	{
	373	struct mac802154_sub_if_data *priv;
	374
	375	dev->addr_len = IEEE802154_ADDR_LEN;
	376	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
	377
	378	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
	379	dev->header_ops = &mac802154_header_ops;
f30be4d5	380	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	381	dev->mtu = IEEE802154_MTU;
e937f583	382	dev->tx_queue_len = 300;
32bad7e3	383	dev->type = ARPHRD_IEEE802154;
	384	dev->flags = IFF_NOARP \| IFF_BROADCAST;
	385	dev->watchdog_timeo = 0;
	386
f30be4d5	387	dev->destructor = mac802154_wpan_free;
32bad7e3	388	dev->netdev_ops = &mac802154_wpan_ops;
	389	dev->ml_priv = &mac802154_mlme_wpan;
	390
	391	priv = netdev_priv(dev);
	392	priv->type = IEEE802154_DEV_WPAN;
	393
	394	priv->chan = MAC802154_CHAN_NONE;
	395	priv->page = 0;
	396
	397	spin_lock_init(&priv->mib_lock);
f30be4d5	398	mutex_init(&priv->sec_mtx);
32bad7e3	399
	400	get_random_bytes(&priv->bsn, 1);
	401	get_random_bytes(&priv->dsn, 1);
	402
e462ded6 PB	403	/* defaults per 802.15.4-2011 */
	404	priv->mac_params.min_be = 3;
	405	priv->mac_params.max_be = 5;
	406	priv->mac_params.csma_retries = 4;
	407	priv->mac_params.frame_retries = -1; /* for compatibility, actual default is 3 */
	408
b70ab2e8 PB	409	priv->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
b70ab2e8 PB	410	priv->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5 PB	411
f30be4d5 PB	412	mac802154_llsec_init(&priv->sec);
32bad7e3	413	}
	414
	415	static int mac802154_process_data(struct net_device dev, struct sk_buff skb)
	416	{
5ff3fec6	417	return netif_rx_ni(skb);
32bad7e3	418	}
	419
	420	static int
f30be4d5 PB	421	mac802154_subif_frame(struct mac802154_sub_if_data sdata, struct sk_buff skb,
f30be4d5 PB	422	const struct ieee802154_hdr *hdr)
32bad7e3	423	{
ae531b94	424	__le16 span, sshort;
f30be4d5	425	int rc;
b70ab2e8	426
32bad7e3	427	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);
	428
	429	spin_lock_bh(&sdata->mib_lock);
	430
ae531b94 PB	431	span = sdata->pan_id;
ae531b94 PB	432	sshort = sdata->short_addr;
b70ab2e8	433
ae531b94	434	switch (mac_cb(skb)->dest.mode) {
32bad7e3	435	case IEEE802154_ADDR_NONE:
ae531b94	436	if (mac_cb(skb)->dest.mode != IEEE802154_ADDR_NONE)
32bad7e3	437	/* FIXME: check if we are PAN coordinator */
	438	skb->pkt_type = PACKET_OTHERHOST;
	439	else
	440	/* ACK comes with both addresses empty */
	441	skb->pkt_type = PACKET_HOST;
	442	break;
	443	case IEEE802154_ADDR_LONG:
ae531b94 PB	444	if (mac_cb(skb)->dest.pan_id != span &&
ae531b94 PB	445	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
32bad7e3	446	skb->pkt_type = PACKET_OTHERHOST;
ae531b94	447	else if (mac_cb(skb)->dest.extended_addr == sdata->extended_addr)
32bad7e3	448	skb->pkt_type = PACKET_HOST;
	449	else
	450	skb->pkt_type = PACKET_OTHERHOST;
	451	break;
	452	case IEEE802154_ADDR_SHORT:
ae531b94 PB	453	if (mac_cb(skb)->dest.pan_id != span &&
ae531b94 PB	454	mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
32bad7e3	455	skb->pkt_type = PACKET_OTHERHOST;
ae531b94	456	else if (mac_cb(skb)->dest.short_addr == sshort)
32bad7e3	457	skb->pkt_type = PACKET_HOST;
ae531b94 PB	458	else if (mac_cb(skb)->dest.short_addr ==
ae531b94 PB	459	cpu_to_le16(IEEE802154_ADDR_BROADCAST))
32bad7e3	460	skb->pkt_type = PACKET_BROADCAST;
	461	else
	462	skb->pkt_type = PACKET_OTHERHOST;
	463	break;
	464	default:
	465	break;
	466	}
	467
	468	spin_unlock_bh(&sdata->mib_lock);
	469
	470	skb->dev = sdata->dev;
	471
f30be4d5 PB	472	rc = mac802154_llsec_decrypt(&sdata->sec, skb);
	473	if (rc) {
	474	pr_debug("decryption failed: %i\n", rc);
a374eeb5	475	kfree_skb(skb);
f30be4d5 PB	476	return NET_RX_DROP;
	477	}
	478
32bad7e3	479	sdata->dev->stats.rx_packets++;
	480	sdata->dev->stats.rx_bytes += skb->len;
	481
32edc40a	482	switch (mac_cb(skb)->type) {
32bad7e3	483	case IEEE802154_FC_TYPE_DATA:
	484	return mac802154_process_data(sdata->dev, skb);
	485	default:
2cc33c7e	486	pr_warn("ieee802154: bad frame received (type = %d)\n",
32edc40a	487	mac_cb(skb)->type);
32bad7e3	488	kfree_skb(skb);
	489	return NET_RX_DROP;
	490	}
	491	}
	492
e6278d92 PB	493	static void mac802154_print_addr(const char *name,
e6278d92 PB	494	const struct ieee802154_addr *addr)
32bad7e3	495	{
e6278d92 PB	496	if (addr->mode == IEEE802154_ADDR_NONE)
e6278d92 PB	497	pr_debug("%s not present\n", name);
32bad7e3	498
e6278d92 PB	499	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
	500	if (addr->mode == IEEE802154_ADDR_SHORT) {
	501	pr_debug("%s is short: %04x\n", name,
	502	le16_to_cpu(addr->short_addr));
	503	} else {
	504	u64 hw = swab64((__force u64) addr->extended_addr);
32bad7e3	505
e6278d92 PB	506	pr_debug("%s is hardware: %8phC\n", name, &hw);
	507	}
	508	}
32bad7e3	509
f30be4d5 PB	510	static int mac802154_parse_frame_start(struct sk_buff *skb,
f30be4d5 PB	511	struct ieee802154_hdr *hdr)
e6278d92	512	{
e6278d92	513	int hlen;
32edc40a	514	struct ieee802154_mac_cb *cb = mac_cb_init(skb);
32bad7e3	515
f30be4d5	516	hlen = ieee802154_hdr_pull(skb, hdr);
e6278d92 PB	517	if (hlen < 0)
e6278d92 PB	518	return -EINVAL;
32bad7e3	519
e6278d92	520	skb->mac_len = hlen;
32bad7e3	521
f30be4d5 PB	522	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc),
f30be4d5 PB	523	hdr->seq);
32bad7e3	524
f30be4d5 PB	525	cb->type = hdr->fc.type;
	526	cb->ackreq = hdr->fc.ack_request;
	527	cb->secen = hdr->fc.security_enabled;
32bad7e3	528
f30be4d5 PB	529	mac802154_print_addr("destination", &hdr->dest);
f30be4d5 PB	530	mac802154_print_addr("source", &hdr->source);
32bad7e3	531
f30be4d5 PB	532	cb->source = hdr->source;
f30be4d5 PB	533	cb->dest = hdr->dest;
ae531b94	534
f30be4d5	535	if (hdr->fc.security_enabled) {
e6278d92	536	u64 key;
32bad7e3	537
f30be4d5	538	pr_debug("seclevel %i\n", hdr->sec.level);
32bad7e3	539
f30be4d5	540	switch (hdr->sec.key_id_mode) {
e6278d92 PB	541	case IEEE802154_SCF_KEY_IMPLICIT:
	542	pr_debug("implicit key\n");
	543	break;
32bad7e3	544
e6278d92	545	case IEEE802154_SCF_KEY_INDEX:
f30be4d5	546	pr_debug("key %02x\n", hdr->sec.key_id);
e6278d92	547	break;
32bad7e3	548
e6278d92 PB	549	case IEEE802154_SCF_KEY_SHORT_INDEX:
e6278d92 PB	550	pr_debug("key %04x:%04x %02x\n",
f30be4d5 PB	551	le32_to_cpu(hdr->sec.short_src) >> 16,
	552	le32_to_cpu(hdr->sec.short_src) & 0xffff,
	553	hdr->sec.key_id);
e6278d92	554	break;
32bad7e3	555
e6278d92	556	case IEEE802154_SCF_KEY_HW_INDEX:
f30be4d5	557	key = swab64((__force u64) hdr->sec.extended_src);
e6278d92	558	pr_debug("key source %8phC %02x\n", &key,
f30be4d5	559	hdr->sec.key_id);
e6278d92	560	break;
32bad7e3	561	}
	562	}
	563
	564	return 0;
32bad7e3	565	}
	566
	567	void mac802154_wpans_rx(struct mac802154_priv priv, struct sk_buff skb)
	568	{
	569	int ret;
32bad7e3	570	struct mac802154_sub_if_data *sdata;
f30be4d5	571	struct ieee802154_hdr hdr;
32bad7e3	572
f30be4d5	573	ret = mac802154_parse_frame_start(skb, &hdr);
32bad7e3	574	if (ret) {
	575	pr_debug("got invalid frame\n");
	576	return;
	577	}
	578
	579	rcu_read_lock();
	580	list_for_each_entry_rcu(sdata, &priv->slaves, list) {
2d3b5b0a PB	581	if (sdata->type != IEEE802154_DEV_WPAN \|\|
2d3b5b0a PB	582	!netif_running(sdata->dev))
32bad7e3	583	continue;
32bad7e3	584
2d3b5b0a PB	585	mac802154_subif_frame(sdata, skb, &hdr);
	586	skb = NULL;
	587	break;
32bad7e3	588	}
32bad7e3	589	rcu_read_unlock();
2d3b5b0a PB	590
	591	if (skb)
	592	kfree_skb(skb);
32bad7e3	593	}