[mirror_ubuntu-zesty-kernel.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++ == 0) {
		res = drv_start(local);
		WARN_ON(res);
		if (res)
			goto err;
	}

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

	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);

	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
32bad7e3	1	/*
	2	* Copyright 2007-2012 Siemens AG
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
32bad7e3	13	* Written by:
	14	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	15	* Sergey Lapin <slapin@ossfans.org>
	16	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	17	* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
	18	*/
	19
	20	#include <linux/netdevice.h>
	21	#include <linux/module.h>
	22	#include <linux/if_arp.h>
4ca24aca	23	#include <linux/ieee802154.h>
32bad7e3	24
	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>
5ad60d36	30	#include <net/cfg802154.h>
32bad7e3	31
0f1556bc	32	#include "ieee802154_i.h"
59cb300f	33	#include "driver-ops.h"
32bad7e3	34
9b0bb4a8 PB	35	static int mac802154_wpan_update_llsec(struct net_device *dev)
9b0bb4a8 PB	36	{
59d19cd7	37	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
9b0bb4a8 PB	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
036562f9	45	params.pan_id = sdata->pan_id;
9b0bb4a8 PB	46	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
9b0bb4a8 PB	47
036562f9	48	params.hwaddr = sdata->extended_addr;
9b0bb4a8 PB	49	changed \|= IEEE802154_LLSEC_PARAM_HWADDR;
	50
	51	rc = ops->llsec->set_params(dev, &params, changed);
	52	}
	53
	54	return rc;
	55	}
	56
32bad7e3	57	static int
	58	mac802154_wpan_ioctl(struct net_device dev, struct ifreq ifr, int cmd)
	59	{
59d19cd7	60	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	61	struct sockaddr_ieee802154 *sa =
	62	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	63	int err = -ENOIOCTLCMD;
	64
036562f9	65	spin_lock_bh(&sdata->mib_lock);
32bad7e3	66
	67	switch (cmd) {
	68	case SIOCGIFADDR:
b70ab2e8 PB	69	{
	70	u16 pan_id, short_addr;
	71
036562f9 AA	72	pan_id = le16_to_cpu(sdata->pan_id);
036562f9 AA	73	short_addr = le16_to_cpu(sdata->short_addr);
b70ab2e8 PB	74	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
b70ab2e8 PB	75	short_addr == IEEE802154_ADDR_BROADCAST) {
32bad7e3	76	err = -EADDRNOTAVAIL;
	77	break;
	78	}
	79
	80	sa->family = AF_IEEE802154;
	81	sa->addr.addr_type = IEEE802154_ADDR_SHORT;
b70ab2e8 PB	82	sa->addr.pan_id = pan_id;
b70ab2e8 PB	83	sa->addr.short_addr = short_addr;
32bad7e3	84
	85	err = 0;
	86	break;
b70ab2e8	87	}
32bad7e3	88	case SIOCSIFADDR:
32bad7e3	89	dev_warn(&dev->dev,
9b13494c	90	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
32bad7e3	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
036562f9 AA	100	sdata->pan_id = cpu_to_le16(sa->addr.pan_id);
036562f9 AA	101	sdata->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	102
9b0bb4a8	103	err = mac802154_wpan_update_llsec(dev);
32bad7e3	104	break;
	105	}
	106
036562f9	107	spin_unlock_bh(&sdata->mib_lock);
32bad7e3	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);
9b0bb4a8	121	return mac802154_wpan_update_llsec(dev);
32bad7e3	122	}
32bad7e3	123
e462ded6 PB	124	int mac802154_set_mac_params(struct net_device *dev,
	125	const struct ieee802154_mac_params *params)
	126	{
59d19cd7	127	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
e462ded6	128
d98be45b	129	mutex_lock(&sdata->local->iflist_mtx);
036562f9	130	sdata->mac_params = *params;
d98be45b	131	mutex_unlock(&sdata->local->iflist_mtx);
e462ded6 PB	132
	133	return 0;
	134	}
	135
	136	void mac802154_get_mac_params(struct net_device *dev,
	137	struct ieee802154_mac_params *params)
	138	{
59d19cd7	139	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
e462ded6	140
d98be45b	141	mutex_lock(&sdata->local->iflist_mtx);
036562f9	142	*params = sdata->mac_params;
d98be45b	143	mutex_unlock(&sdata->local->iflist_mtx);
e462ded6 PB	144	}
e462ded6 PB	145
19ec690a AA	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 &&
0ea3da64	159	ieee802154_sdata_running(subif)) {
19ec690a AA	160	mutex_unlock(&sdata->local->iflist_mtx);
	161	return -EBUSY;
	162	}
	163	}
	164	mutex_unlock(&sdata->local->iflist_mtx);
	165	}
	166
0ea3da64	167	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	168
19ec690a AA	169	if (local->open_count++ == 0) {
59cb300f	170	res = drv_start(local);
19ec690a AA	171	WARN_ON(res);
	172	if (res)
	173	goto err;
	174	}
	175
	176	netif_start_queue(dev);
	177	return 0;
	178	err:
0ea3da64 AA	179	/* might already be clear but that doesn't matter */
0ea3da64 AA	180	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	181	sdata->local->open_count--;
	182
	183	return res;
	184	}
	185
6ef0023a	186	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	187	{
e462ded6 PB	188	int rc;
59d19cd7	189	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
59cb300f	190	struct ieee802154_local *local = sdata->local;
04e850fe	191	struct wpan_phy *phy = sdata->local->phy;
e462ded6 PB	192
	193	rc = mac802154_slave_open(dev);
	194	if (rc < 0)
	195	return rc;
	196
	197	mutex_lock(&phy->pib_lock);
	198
a543c598	199	if (local->hw.flags & IEEE802154_HW_TXPOWER) {
59cb300f	200	rc = drv_set_tx_power(local, sdata->mac_params.transmit_power);
e462ded6 PB	201	if (rc < 0)
	202	goto out;
	203	}
	204
a543c598	205	if (local->hw.flags & IEEE802154_HW_LBT) {
59cb300f	206	rc = drv_set_lbt_mode(local, sdata->mac_params.lbt);
e462ded6 PB	207	if (rc < 0)
	208	goto out;
	209	}
	210
a543c598	211	if (local->hw.flags & IEEE802154_HW_CCA_MODE) {
59cb300f	212	rc = drv_set_cca_mode(local, sdata->mac_params.cca_mode);
e462ded6 PB	213	if (rc < 0)
	214	goto out;
	215	}
	216
a543c598	217	if (local->hw.flags & IEEE802154_HW_CCA_ED_LEVEL) {
59cb300f AA	218	rc = drv_set_cca_ed_level(local,
59cb300f AA	219	sdata->mac_params.cca_ed_level);
e462ded6 PB	220	if (rc < 0)
	221	goto out;
	222	}
	223
a543c598	224	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
59cb300f AA	225	rc = drv_set_csma_params(local, sdata->mac_params.min_be,
	226	sdata->mac_params.max_be,
	227	sdata->mac_params.csma_retries);
e462ded6 PB	228	if (rc < 0)
	229	goto out;
	230	}
	231
a543c598	232	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
59cb300f AA	233	rc = drv_set_max_frame_retries(local,
59cb300f AA	234	sdata->mac_params.frame_retries);
e462ded6 PB	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
19ec690a AA	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
0ea3da64	256	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	257
19ec690a AA	258	if (!--local->open_count)
59cb300f	259	drv_stop(local);
19ec690a AA	260
	261	return 0;
	262	}
	263
036562f9	264	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	265	struct ieee802154_hdr *hdr,
	266	const struct ieee802154_mac_cb *cb)
	267	{
	268	struct ieee802154_llsec_params params;
	269	u8 level;
	270
036562f9	271	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	272
	273	if (!params.enabled && cb->secen_override && cb->secen)
	274	return -EINVAL;
	275	if (!params.enabled \|\|
	276	(cb->secen_override && !cb->secen) \|\|
	277	!params.out_level)
	278	return 0;
	279	if (cb->seclevel_override && !cb->seclevel)
	280	return -EINVAL;
	281
	282	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	283
	284	hdr->fc.security_enabled = 1;
	285	hdr->sec.level = level;
	286	hdr->sec.key_id_mode = params.out_key.mode;
	287	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	288	hdr->sec.short_src = params.out_key.short_source;
	289	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	290	hdr->sec.extended_src = params.out_key.extended_source;
	291	hdr->sec.key_id = params.out_key.id;
	292
	293	return 0;
	294	}
	295
32bad7e3	296	static int mac802154_header_create(struct sk_buff *skb,
	297	struct net_device *dev,
	298	unsigned short type,
e6278d92 PB	299	const void *daddr,
e6278d92 PB	300	const void *saddr,
32bad7e3	301	unsigned len)
32bad7e3	302	{
e6278d92	303	struct ieee802154_hdr hdr;
59d19cd7	304	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32edc40a	305	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	306	int hlen;
32bad7e3	307
	308	if (!daddr)
	309	return -EINVAL;
	310
e6278d92	311	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	312	hdr.fc.type = cb->type;
	313	hdr.fc.security_enabled = cb->secen;
	314	hdr.fc.ack_request = cb->ackreq;
	315	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
32bad7e3	316
036562f9	317	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	318	return -EINVAL;
f30be4d5 PB	319
32bad7e3	320	if (!saddr) {
036562f9	321	spin_lock_bh(&sdata->mib_lock);
32bad7e3	322
036562f9 AA	323	if (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	324	sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	325	sdata->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	326	hdr.source.mode = IEEE802154_ADDR_LONG;
036562f9	327	hdr.source.extended_addr = sdata->extended_addr;
32bad7e3	328	} else {
e6278d92	329	hdr.source.mode = IEEE802154_ADDR_SHORT;
036562f9	330	hdr.source.short_addr = sdata->short_addr;
32bad7e3	331	}
32bad7e3	332
036562f9	333	hdr.source.pan_id = sdata->pan_id;
32bad7e3	334
036562f9	335	spin_unlock_bh(&sdata->mib_lock);
e6278d92 PB	336	} else {
e6278d92 PB	337	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	338	}
32bad7e3	339
e6278d92	340	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	341
e6278d92 PB	342	hlen = ieee802154_hdr_push(skb, &hdr);
	343	if (hlen < 0)
	344	return -EINVAL;
32bad7e3	345
3e69162e	346	skb_reset_mac_header(skb);
e6278d92	347	skb->mac_len = hlen;
32bad7e3	348
8c84296f	349	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	350	return -EMSGSIZE;
d1d7358e PB	351
e6278d92	352	return hlen;
32bad7e3	353	}
	354
	355	static int
	356	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	357	{
e6278d92 PB	358	struct ieee802154_hdr hdr;
e6278d92 PB	359	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	360
e6278d92 PB	361	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	362	pr_debug("malformed packet\n");
	363	return 0;
32bad7e3	364	}
32bad7e3	365
e6278d92 PB	366	*addr = hdr.source;
e6278d92 PB	367	return sizeof(*addr);
32bad7e3	368	}
32bad7e3	369
32bad7e3	370	static struct header_ops mac802154_header_ops = {
	371	.create = mac802154_header_create,
	372	.parse = mac802154_header_parse,
	373	};
	374
	375	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	376	.ndo_open = mac802154_wpan_open,
32bad7e3	377	.ndo_stop = mac802154_slave_close,
e5e584fc	378	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	379	.ndo_do_ioctl = mac802154_wpan_ioctl,
	380	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	381	};
	382
b9ff77e5 AA	383	static const struct net_device_ops mac802154_monitor_ops = {
	384	.ndo_open = mac802154_slave_open,
	385	.ndo_stop = mac802154_slave_close,
	386	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	387	};
	388
f30be4d5 PB	389	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	390	{
59d19cd7	391	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	392
036562f9	393	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	394
	395	free_netdev(dev);
	396	}
	397
32bad7e3	398	void mac802154_wpan_setup(struct net_device *dev)
32bad7e3	399	{
036562f9	400	struct ieee802154_sub_if_data *sdata;
32bad7e3	401
	402	dev->addr_len = IEEE802154_ADDR_LEN;
	403	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
	404
	405	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
	406	dev->header_ops = &mac802154_header_ops;
f30be4d5	407	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	408	dev->mtu = IEEE802154_MTU;
e937f583	409	dev->tx_queue_len = 300;
32bad7e3	410	dev->type = ARPHRD_IEEE802154;
32bad7e3	411	dev->flags = IFF_NOARP \| IFF_BROADCAST;
32bad7e3	412
f30be4d5	413	dev->destructor = mac802154_wpan_free;
32bad7e3	414	dev->netdev_ops = &mac802154_wpan_ops;
	415	dev->ml_priv = &mac802154_mlme_wpan;
	416
59d19cd7	417	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
036562f9	418	sdata->type = IEEE802154_DEV_WPAN;
32bad7e3	419
036562f9 AA	420	spin_lock_init(&sdata->mib_lock);
036562f9 AA	421	mutex_init(&sdata->sec_mtx);
32bad7e3	422
036562f9 AA	423	get_random_bytes(&sdata->bsn, 1);
036562f9 AA	424	get_random_bytes(&sdata->dsn, 1);
32bad7e3	425
e462ded6	426	/* defaults per 802.15.4-2011 */
036562f9 AA	427	sdata->mac_params.min_be = 3;
	428	sdata->mac_params.max_be = 5;
	429	sdata->mac_params.csma_retries = 4;
	430	/* for compatibility, actual default is 3 */
	431	sdata->mac_params.frame_retries = -1;
e462ded6	432
036562f9 AA	433	sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
036562f9 AA	434	sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	435
036562f9	436	mac802154_llsec_init(&sdata->sec);
32bad7e3	437	}
b9ff77e5 AA	438
	439	void mac802154_monitor_setup(struct net_device *dev)
	440	{
	441	struct ieee802154_sub_if_data *sdata;
	442
b9ff77e5 AA	443	dev->needed_tailroom = 2; /* room for FCS */
	444	dev->mtu = IEEE802154_MTU;
	445	dev->tx_queue_len = 10;
	446	dev->type = ARPHRD_IEEE802154_MONITOR;
	447	dev->flags = IFF_NOARP \| IFF_BROADCAST;
b9ff77e5 AA	448
	449	dev->destructor = free_netdev;
	450	dev->netdev_ops = &mac802154_monitor_ops;
	451	dev->ml_priv = &mac802154_mlme_reduced;
	452
	453	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	454	sdata->type = IEEE802154_DEV_MONITOR;
b9ff77e5	455	}