[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/rtnetlink.h>
#include <linux/nl802154.h>
#include <net/af_ieee802154.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);
	int rc = 0;

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

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

		params.hwaddr = sdata->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 sockaddr_ieee802154 *sa =
		(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	int err = -ENOIOCTLCMD;

	spin_lock_bh(&sdata->mib_lock);

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

		pan_id = le16_to_cpu(sdata->pan_id);
		short_addr = le16_to_cpu(sdata->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 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;
		}

		sdata->pan_id = cpu_to_le16(sa->addr.pan_id);
		sdata->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 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 ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	mutex_lock(&sdata->local->iflist_mtx);
	sdata->mac_params = *params;
	mutex_unlock(&sdata->local->iflist_mtx);

	return 0;
}

void mac802154_get_mac_params(struct net_device *dev,
			      struct ieee802154_mac_params *params)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	mutex_lock(&sdata->local->iflist_mtx);
	*params = sdata->mac_params;
	mutex_unlock(&sdata->local->iflist_mtx);
}

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->type == IEEE802154_DEV_WPAN) {
		mutex_lock(&sdata->local->iflist_mtx);
		list_for_each_entry(subif, &sdata->local->interfaces, list) {
			if (subif != sdata && subif->type == sdata->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_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_TXPOWER) {
		rc = drv_set_tx_power(local, sdata->mac_params.transmit_power);
		if (rc < 0)
			goto out;
	}

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

	if (local->hw.flags & IEEE802154_HW_CCA_MODE) {
		rc = drv_set_cca_mode(local, sdata->mac_params.cca_mode);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_CCA_ED_LEVEL) {
		rc = drv_set_cca_ed_level(local,
					  sdata->mac_params.cca_ed_level);
		if (rc < 0)
			goto out;
	}

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

	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
		rc = drv_set_max_frame_retries(local,
					       sdata->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_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();

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

		hdr.source.pan_id = sdata->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_slave_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);
}

void mac802154_wpan_setup(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata;

	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->destructor		= mac802154_wpan_free;
	dev->netdev_ops		= &mac802154_wpan_ops;
	dev->ml_priv		= &mac802154_mlme_wpan;

	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	sdata->type = IEEE802154_DEV_WPAN;

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

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

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

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

	mac802154_llsec_init(&sdata->sec);
}

void mac802154_monitor_setup(struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata;

	dev->needed_tailroom	= 2; /* room for FCS */
	dev->mtu		= IEEE802154_MTU;
	dev->tx_queue_len	= 10;
	dev->type		= ARPHRD_IEEE802154_MONITOR;
	dev->flags		= IFF_NOARP | IFF_BROADCAST;

	dev->destructor		= free_netdev;
	dev->netdev_ops		= &mac802154_monitor_ops;
	dev->ml_priv		= &mac802154_mlme_reduced;

	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	sdata->type = IEEE802154_DEV_MONITOR;
}
Commit	Line	Data
	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	* 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>
	23	#include <linux/ieee802154.h>
	24
	25	#include <net/rtnetlink.h>
	26	#include <linux/nl802154.h>
	27	#include <net/af_ieee802154.h>
	28	#include <net/mac802154.h>
	29	#include <net/ieee802154_netdev.h>
	30	#include <net/cfg802154.h>
	31
	32	#include "ieee802154_i.h"
	33	#include "driver-ops.h"
	34
	35	static int mac802154_wpan_update_llsec(struct net_device *dev)
	36	{
	37	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	38	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
	39	int rc = 0;
	40
	41	if (ops->llsec) {
	42	struct ieee802154_llsec_params params;
	43	int changed = 0;
	44
	45	params.pan_id = sdata->pan_id;
	46	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
	47
	48	params.hwaddr = sdata->extended_addr;
	49	changed \|= IEEE802154_LLSEC_PARAM_HWADDR;
	50
	51	rc = ops->llsec->set_params(dev, &params, changed);
	52	}
	53
	54	return rc;
	55	}
	56
	57	static int
	58	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	59	{
	60	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	61	struct sockaddr_ieee802154 *sa =
	62	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	63	int err = -ENOIOCTLCMD;
	64
	65	spin_lock_bh(&sdata->mib_lock);
	66
	67	switch (cmd) {
	68	case SIOCGIFADDR:
	69	{
	70	u16 pan_id, short_addr;
	71
	72	pan_id = le16_to_cpu(sdata->pan_id);
	73	short_addr = le16_to_cpu(sdata->short_addr);
	74	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
	75	short_addr == IEEE802154_ADDR_BROADCAST) {
	76	err = -EADDRNOTAVAIL;
	77	break;
	78	}
	79
	80	sa->family = AF_IEEE802154;
	81	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
	82	sa->addr.pan_id = pan_id;
	83	sa->addr.short_addr = short_addr;
	84
	85	err = 0;
	86	break;
	87	}
	88	case SIOCSIFADDR:
	89	dev_warn(&dev->dev,
	90	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
	91	if (sa->family != AF_IEEE802154 \|\|
	92	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	93	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	94	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	95	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	96	err = -EINVAL;
	97	break;
	98	}
	99
	100	sdata->pan_id = cpu_to_le16(sa->addr.pan_id);
	101	sdata->short_addr = cpu_to_le16(sa->addr.short_addr);
	102
	103	err = mac802154_wpan_update_llsec(dev);
	104	break;
	105	}
	106
	107	spin_unlock_bh(&sdata->mib_lock);
	108	return err;
	109	}
	110
	111	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	112	{
	113	struct sockaddr *addr = p;
	114
	115	if (netif_running(dev))
	116	return -EBUSY;
	117
	118	/* FIXME: validate addr */
	119	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	120	mac802154_dev_set_ieee_addr(dev);
	121	return mac802154_wpan_update_llsec(dev);
	122	}
	123
	124	int mac802154_set_mac_params(struct net_device *dev,
	125	const struct ieee802154_mac_params *params)
	126	{
	127	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	128
	129	mutex_lock(&sdata->local->iflist_mtx);
	130	sdata->mac_params = *params;
	131	mutex_unlock(&sdata->local->iflist_mtx);
	132
	133	return 0;
	134	}
	135
	136	void mac802154_get_mac_params(struct net_device *dev,
	137	struct ieee802154_mac_params *params)
	138	{
	139	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	140
	141	mutex_lock(&sdata->local->iflist_mtx);
	142	*params = sdata->mac_params;
	143	mutex_unlock(&sdata->local->iflist_mtx);
	144	}
	145
	146	static int mac802154_slave_open(struct net_device *dev)
	147	{
	148	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	149	struct ieee802154_sub_if_data *subif;
	150	struct ieee802154_local *local = sdata->local;
	151	int res = 0;
	152
	153	ASSERT_RTNL();
	154
	155	if (sdata->type == IEEE802154_DEV_WPAN) {
	156	mutex_lock(&sdata->local->iflist_mtx);
	157	list_for_each_entry(subif, &sdata->local->interfaces, list) {
	158	if (subif != sdata && subif->type == sdata->type &&
	159	ieee802154_sdata_running(subif)) {
	160	mutex_unlock(&sdata->local->iflist_mtx);
	161	return -EBUSY;
	162	}
	163	}
	164	mutex_unlock(&sdata->local->iflist_mtx);
	165	}
	166
	167	set_bit(SDATA_STATE_RUNNING, &sdata->state);
	168
	169	if (!local->open_count) {
	170	res = drv_start(local);
	171	WARN_ON(res);
	172	if (res)
	173	goto err;
	174	}
	175
	176	local->open_count++;
	177	netif_start_queue(dev);
	178	return 0;
	179	err:
	180	/* might already be clear but that doesn't matter */
	181	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
	182
	183	return res;
	184	}
	185
	186	static int mac802154_wpan_open(struct net_device *dev)
	187	{
	188	int rc;
	189	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	190	struct ieee802154_local *local = sdata->local;
	191	struct wpan_phy *phy = sdata->local->phy;
	192
	193	rc = mac802154_slave_open(dev);
	194	if (rc < 0)
	195	return rc;
	196
	197	mutex_lock(&phy->pib_lock);
	198
	199	if (local->hw.flags & IEEE802154_HW_TXPOWER) {
	200	rc = drv_set_tx_power(local, sdata->mac_params.transmit_power);
	201	if (rc < 0)
	202	goto out;
	203	}
	204
	205	if (local->hw.flags & IEEE802154_HW_LBT) {
	206	rc = drv_set_lbt_mode(local, sdata->mac_params.lbt);
	207	if (rc < 0)
	208	goto out;
	209	}
	210
	211	if (local->hw.flags & IEEE802154_HW_CCA_MODE) {
	212	rc = drv_set_cca_mode(local, sdata->mac_params.cca_mode);
	213	if (rc < 0)
	214	goto out;
	215	}
	216
	217	if (local->hw.flags & IEEE802154_HW_CCA_ED_LEVEL) {
	218	rc = drv_set_cca_ed_level(local,
	219	sdata->mac_params.cca_ed_level);
	220	if (rc < 0)
	221	goto out;
	222	}
	223
	224	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
	225	rc = drv_set_csma_params(local, sdata->mac_params.min_be,
	226	sdata->mac_params.max_be,
	227	sdata->mac_params.csma_retries);
	228	if (rc < 0)
	229	goto out;
	230	}
	231
	232	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
	233	rc = drv_set_max_frame_retries(local,
	234	sdata->mac_params.frame_retries);
	235	if (rc < 0)
	236	goto out;
	237	}
	238
	239	mutex_unlock(&phy->pib_lock);
	240	return 0;
	241
	242	out:
	243	mutex_unlock(&phy->pib_lock);
	244	return rc;
	245	}
	246
	247	static int mac802154_slave_close(struct net_device *dev)
	248	{
	249	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	250	struct ieee802154_local *local = sdata->local;
	251
	252	ASSERT_RTNL();
	253
	254	netif_stop_queue(dev);
	255	local->open_count--;
	256
	257	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
	258
	259	if (!local->open_count)
	260	drv_stop(local);
	261
	262	return 0;
	263	}
	264
	265	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
	266	struct ieee802154_hdr *hdr,
	267	const struct ieee802154_mac_cb *cb)
	268	{
	269	struct ieee802154_llsec_params params;
	270	u8 level;
	271
	272	mac802154_llsec_get_params(&sdata->sec, &params);
	273
	274	if (!params.enabled && cb->secen_override && cb->secen)
	275	return -EINVAL;
	276	if (!params.enabled \|\|
	277	(cb->secen_override && !cb->secen) \|\|
	278	!params.out_level)
	279	return 0;
	280	if (cb->seclevel_override && !cb->seclevel)
	281	return -EINVAL;
	282
	283	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	284
	285	hdr->fc.security_enabled = 1;
	286	hdr->sec.level = level;
	287	hdr->sec.key_id_mode = params.out_key.mode;
	288	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	289	hdr->sec.short_src = params.out_key.short_source;
	290	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	291	hdr->sec.extended_src = params.out_key.extended_source;
	292	hdr->sec.key_id = params.out_key.id;
	293
	294	return 0;
	295	}
	296
	297	static int mac802154_header_create(struct sk_buff *skb,
	298	struct net_device *dev,
	299	unsigned short type,
	300	const void *daddr,
	301	const void *saddr,
	302	unsigned len)
	303	{
	304	struct ieee802154_hdr hdr;
	305	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	306	struct ieee802154_mac_cb *cb = mac_cb(skb);
	307	int hlen;
	308
	309	if (!daddr)
	310	return -EINVAL;
	311
	312	memset(&hdr.fc, 0, sizeof(hdr.fc));
	313	hdr.fc.type = cb->type;
	314	hdr.fc.security_enabled = cb->secen;
	315	hdr.fc.ack_request = cb->ackreq;
	316	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
	317
	318	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
	319	return -EINVAL;
	320
	321	if (!saddr) {
	322	spin_lock_bh(&sdata->mib_lock);
	323
	324	if (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	325	sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	326	sdata->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
	327	hdr.source.mode = IEEE802154_ADDR_LONG;
	328	hdr.source.extended_addr = sdata->extended_addr;
	329	} else {
	330	hdr.source.mode = IEEE802154_ADDR_SHORT;
	331	hdr.source.short_addr = sdata->short_addr;
	332	}
	333
	334	hdr.source.pan_id = sdata->pan_id;
	335
	336	spin_unlock_bh(&sdata->mib_lock);
	337	} else {
	338	hdr.source = (const struct ieee802154_addr )saddr;
	339	}
	340
	341	hdr.dest = (const struct ieee802154_addr )daddr;
	342
	343	hlen = ieee802154_hdr_push(skb, &hdr);
	344	if (hlen < 0)
	345	return -EINVAL;
	346
	347	skb_reset_mac_header(skb);
	348	skb->mac_len = hlen;
	349
	350	if (len > ieee802154_max_payload(&hdr))
	351	return -EMSGSIZE;
	352
	353	return hlen;
	354	}
	355
	356	static int
	357	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	358	{
	359	struct ieee802154_hdr hdr;
	360	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
	361
	362	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	363	pr_debug("malformed packet\n");
	364	return 0;
	365	}
	366
	367	*addr = hdr.source;
	368	return sizeof(*addr);
	369	}
	370
	371	static struct header_ops mac802154_header_ops = {
	372	.create = mac802154_header_create,
	373	.parse = mac802154_header_parse,
	374	};
	375
	376	static const struct net_device_ops mac802154_wpan_ops = {
	377	.ndo_open = mac802154_wpan_open,
	378	.ndo_stop = mac802154_slave_close,
	379	.ndo_start_xmit = ieee802154_subif_start_xmit,
	380	.ndo_do_ioctl = mac802154_wpan_ioctl,
	381	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	382	};
	383
	384	static const struct net_device_ops mac802154_monitor_ops = {
	385	.ndo_open = mac802154_slave_open,
	386	.ndo_stop = mac802154_slave_close,
	387	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	388	};
	389
	390	static void mac802154_wpan_free(struct net_device *dev)
	391	{
	392	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	393
	394	mac802154_llsec_destroy(&sdata->sec);
	395
	396	free_netdev(dev);
	397	}
	398
	399	void mac802154_wpan_setup(struct net_device *dev)
	400	{
	401	struct ieee802154_sub_if_data *sdata;
	402
	403	dev->addr_len = IEEE802154_ADDR_LEN;
	404	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
	405
	406	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
	407	dev->header_ops = &mac802154_header_ops;
	408	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
	409	dev->mtu = IEEE802154_MTU;
	410	dev->tx_queue_len = 300;
	411	dev->type = ARPHRD_IEEE802154;
	412	dev->flags = IFF_NOARP \| IFF_BROADCAST;
	413
	414	dev->destructor = mac802154_wpan_free;
	415	dev->netdev_ops = &mac802154_wpan_ops;
	416	dev->ml_priv = &mac802154_mlme_wpan;
	417
	418	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	419	sdata->type = IEEE802154_DEV_WPAN;
	420
	421	spin_lock_init(&sdata->mib_lock);
	422	mutex_init(&sdata->sec_mtx);
	423
	424	get_random_bytes(&sdata->bsn, 1);
	425	get_random_bytes(&sdata->dsn, 1);
	426
	427	/* defaults per 802.15.4-2011 */
	428	sdata->mac_params.min_be = 3;
	429	sdata->mac_params.max_be = 5;
	430	sdata->mac_params.csma_retries = 4;
	431	/* for compatibility, actual default is 3 */
	432	sdata->mac_params.frame_retries = -1;
	433
	434	sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
	435	sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
	436
	437	mac802154_llsec_init(&sdata->sec);
	438	}
	439
	440	void mac802154_monitor_setup(struct net_device *dev)
	441	{
	442	struct ieee802154_sub_if_data *sdata;
	443
	444	dev->needed_tailroom = 2; /* room for FCS */
	445	dev->mtu = IEEE802154_MTU;
	446	dev->tx_queue_len = 10;
	447	dev->type = ARPHRD_IEEE802154_MONITOR;
	448	dev->flags = IFF_NOARP \| IFF_BROADCAST;
	449
	450	dev->destructor = free_netdev;
	451	dev->netdev_ops = &mac802154_monitor_ops;
	452	dev->ml_priv = &mac802154_mlme_reduced;
	453
	454	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	455	sdata->type = IEEE802154_DEV_MONITOR;
	456	}