[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/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);
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
	int rc = 0;

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

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

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

	ASSERT_RTNL();

	spin_lock_bh(&sdata->mib_lock);

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

		pan_id = le16_to_cpu(wpan_dev->pan_id);
		short_addr = le16_to_cpu(wpan_dev->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:
		if (netif_running(dev)) {
			spin_unlock_bh(&sdata->mib_lock);
			return -EBUSY;
		}

		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;
		}

		wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
		wpan_dev->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 ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct sockaddr *addr = p;
	__le64 extended_addr;

	if (netif_running(dev))
		return -EBUSY;

	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
	if (!ieee802154_is_valid_extended_addr(extended_addr))
		return -EINVAL;

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
	sdata->wpan_dev.extended_addr = extended_addr;

	return mac802154_wpan_update_llsec(dev);
}

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->vif.type == IEEE802154_DEV_WPAN) {
		mutex_lock(&sdata->local->iflist_mtx);
		list_for_each_entry(subif, &sdata->local->interfaces, list) {
			if (subif != sdata &&
			    subif->vif.type == sdata->vif.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_dev *wpan_dev = &sdata->wpan_dev;
	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_PROMISCUOUS) {
		rc = drv_set_promiscuous_mode(local,
					      wpan_dev->promiscuous_mode);
		if (rc < 0)
			goto out;
	}

	if (local->hw.flags & IEEE802154_HW_AFILT) {
		rc = drv_set_pan_id(local, wpan_dev->pan_id);
		if (rc < 0)
			goto out;

		rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
		if (rc < 0)
			goto out;

		rc = drv_set_short_addr(local, wpan_dev->short_addr);
		if (rc < 0)
			goto out;
	}

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

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

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

	hrtimer_cancel(&local->ifs_timer);

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

		hdr.source.pan_id = wpan_dev->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_wpan_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);
}

static void ieee802154_if_setup(struct net_device *dev)
{
	dev->addr_len		= IEEE802154_EXTENDED_ADDR_LEN;
	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);

	dev->hard_header_len	= MAC802154_FRAME_HARD_HEADER_LEN;
	dev->needed_tailroom	= 2 + 16; /* FCS + MIC */
	dev->mtu		= IEEE802154_MTU;
	dev->tx_queue_len	= 300;
	dev->flags		= IFF_NOARP | IFF_BROADCAST;
}

static int
ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, int type)
{
	struct wpan_dev *wpan_dev = &sdata->wpan_dev;

	/* set some type-dependent values */
	sdata->vif.type = type;
	sdata->wpan_dev.iftype = type;

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

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

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

	switch (type) {
	case IEEE802154_DEV_WPAN:
		ieee802154_be64_to_le64(&wpan_dev->extended_addr,
					sdata->dev->dev_addr);

		sdata->dev->header_ops = &mac802154_header_ops;
		sdata->dev->destructor = mac802154_wpan_free;
		sdata->dev->netdev_ops = &mac802154_wpan_ops;
		sdata->dev->ml_priv = &mac802154_mlme_wpan;
		wpan_dev->promiscuous_mode = false;

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

		mac802154_llsec_init(&sdata->sec);
		break;
	case IEEE802154_DEV_MONITOR:
		sdata->dev->destructor = free_netdev;
		sdata->dev->netdev_ops = &mac802154_monitor_ops;
		wpan_dev->promiscuous_mode = true;
		break;
	default:
		BUG();
	}

	return 0;
}

struct net_device *
ieee802154_if_add(struct ieee802154_local *local, const char *name,
		  struct wpan_dev **new_wpan_dev, int type)
{
	struct net_device *ndev = NULL;
	struct ieee802154_sub_if_data *sdata = NULL;
	int ret = -ENOMEM;

	ASSERT_RTNL();

	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
			    NET_NAME_UNKNOWN, ieee802154_if_setup);
	if (!ndev)
		return ERR_PTR(-ENOMEM);

	ndev->needed_headroom = local->hw.extra_tx_headroom;

	ret = dev_alloc_name(ndev, ndev->name);
	if (ret < 0)
		goto err;

	switch (type) {
	case IEEE802154_DEV_WPAN:
		ndev->type = ARPHRD_IEEE802154;
		break;
	case IEEE802154_DEV_MONITOR:
		ndev->type = ARPHRD_IEEE802154_MONITOR;
		break;
	default:
		ret = -EINVAL;
		goto err;
	}

	ieee802154_le64_to_be64(ndev->perm_addr,
				&local->hw.phy->perm_extended_addr);
	memcpy(ndev->dev_addr, ndev->perm_addr, IEEE802154_EXTENDED_ADDR_LEN);
	/* TODO check this */
	SET_NETDEV_DEV(ndev, &local->phy->dev);
	sdata = netdev_priv(ndev);
	ndev->ieee802154_ptr = &sdata->wpan_dev;
	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	sdata->dev = ndev;
	sdata->wpan_dev.wpan_phy = local->hw.phy;
	sdata->local = local;

	/* setup type-dependent data */
	ret = ieee802154_setup_sdata(sdata, type);
	if (ret)
		goto err;

	if (ndev) {
		ret = register_netdevice(ndev);
		if (ret < 0)
			goto err;
	}

	mutex_lock(&local->iflist_mtx);
	list_add_tail_rcu(&sdata->list, &local->interfaces);
	mutex_unlock(&local->iflist_mtx);

	if (new_wpan_dev)
		*new_wpan_dev = &sdata->wpan_dev;

	return ndev;

err:
	free_netdev(ndev);
	return ERR_PTR(ret);
}

void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
{
	ASSERT_RTNL();

	mutex_lock(&sdata->local->iflist_mtx);
	list_del_rcu(&sdata->list);
	mutex_unlock(&sdata->local->iflist_mtx);

	synchronize_rcu();
	unregister_netdevice(sdata->dev);
}

void ieee802154_remove_interfaces(struct ieee802154_local *local)
{
	struct ieee802154_sub_if_data *sdata, *tmp;

	mutex_lock(&local->iflist_mtx);
	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
		list_del(&sdata->list);

		unregister_netdevice(sdata->dev);
	}
	mutex_unlock(&local->iflist_mtx);
}

static int netdev_notify(struct notifier_block *nb,
			 unsigned long state, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct ieee802154_sub_if_data *sdata;

	if (state != NETDEV_CHANGENAME)
		return NOTIFY_DONE;

	if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
		return NOTIFY_DONE;

	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
		return NOTIFY_DONE;

	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	memcpy(sdata->name, dev->name, IFNAMSIZ);

	return NOTIFY_OK;
}

static struct notifier_block mac802154_netdev_notifier = {
	.notifier_call = netdev_notify,
};

int ieee802154_iface_init(void)
{
	return register_netdevice_notifier(&mac802154_netdev_notifier);
}

void ieee802154_iface_exit(void)
{
	unregister_netdevice_notifier(&mac802154_netdev_notifier);
}
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>
32bad7e3	27	#include <net/mac802154.h>
32bad7e3	28	#include <net/ieee802154_netdev.h>
5ad60d36	29	#include <net/cfg802154.h>
32bad7e3	30
0f1556bc	31	#include "ieee802154_i.h"
59cb300f	32	#include "driver-ops.h"
32bad7e3	33
9b0bb4a8 PB	34	static int mac802154_wpan_update_llsec(struct net_device *dev)
9b0bb4a8 PB	35	{
59d19cd7	36	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
9b0bb4a8	37	struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
863e88f2	38	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
9b0bb4a8 PB	39	int rc = 0;
	40
	41	if (ops->llsec) {
	42	struct ieee802154_llsec_params params;
	43	int changed = 0;
	44
863e88f2	45	params.pan_id = wpan_dev->pan_id;
9b0bb4a8 PB	46	changed \|= IEEE802154_LLSEC_PARAM_PAN_ID;
9b0bb4a8 PB	47
863e88f2	48	params.hwaddr = wpan_dev->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);
863e88f2	61	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32bad7e3	62	struct sockaddr_ieee802154 *sa =
	63	(struct sockaddr_ieee802154 *)&ifr->ifr_addr;
	64	int err = -ENOIOCTLCMD;
	65
f7cb96f1 AA	66	ASSERT_RTNL();
f7cb96f1 AA	67
036562f9	68	spin_lock_bh(&sdata->mib_lock);
32bad7e3	69
	70	switch (cmd) {
	71	case SIOCGIFADDR:
b70ab2e8 PB	72	{
	73	u16 pan_id, short_addr;
	74
863e88f2 AA	75	pan_id = le16_to_cpu(wpan_dev->pan_id);
863e88f2 AA	76	short_addr = le16_to_cpu(wpan_dev->short_addr);
b70ab2e8 PB	77	if (pan_id == IEEE802154_PANID_BROADCAST \|\|
b70ab2e8 PB	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:
f7cb96f1 AA	92	if (netif_running(dev)) {
	93	spin_unlock_bh(&sdata->mib_lock);
	94	return -EBUSY;
	95	}
	96
32bad7e3	97	dev_warn(&dev->dev,
9b13494c	98	"Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
32bad7e3	99	if (sa->family != AF_IEEE802154 \|\|
	100	sa->addr.addr_type != IEEE802154_ADDR_SHORT \|\|
	101	sa->addr.pan_id == IEEE802154_PANID_BROADCAST \|\|
	102	sa->addr.short_addr == IEEE802154_ADDR_BROADCAST \|\|
	103	sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
	104	err = -EINVAL;
	105	break;
	106	}
	107
863e88f2 AA	108	wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
863e88f2 AA	109	wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
32bad7e3	110
9b0bb4a8	111	err = mac802154_wpan_update_llsec(dev);
32bad7e3	112	break;
	113	}
	114
036562f9	115	spin_unlock_bh(&sdata->mib_lock);
32bad7e3	116	return err;
	117	}
	118
	119	static int mac802154_wpan_mac_addr(struct net_device dev, void p)
	120	{
776e59de	121	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	122	struct sockaddr *addr = p;
ea7053c1	123	__le64 extended_addr;
32bad7e3	124
	125	if (netif_running(dev))
	126	return -EBUSY;
	127
705cbbbe	128	ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
ea7053c1 AA	129	if (!ieee802154_is_valid_extended_addr(extended_addr))
	130	return -EINVAL;
	131
32bad7e3	132	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
863e88f2	133	sdata->wpan_dev.extended_addr = extended_addr;
776e59de	134
9b0bb4a8	135	return mac802154_wpan_update_llsec(dev);
32bad7e3	136	}
32bad7e3	137
19ec690a AA	138	static int mac802154_slave_open(struct net_device *dev)
	139	{
	140	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	141	struct ieee802154_sub_if_data *subif;
	142	struct ieee802154_local *local = sdata->local;
	143	int res = 0;
	144
	145	ASSERT_RTNL();
	146
7c118c1a	147	if (sdata->vif.type == IEEE802154_DEV_WPAN) {
19ec690a AA	148	mutex_lock(&sdata->local->iflist_mtx);
19ec690a AA	149	list_for_each_entry(subif, &sdata->local->interfaces, list) {
7c118c1a AA	150	if (subif != sdata &&
7c118c1a AA	151	subif->vif.type == sdata->vif.type &&
0ea3da64	152	ieee802154_sdata_running(subif)) {
19ec690a AA	153	mutex_unlock(&sdata->local->iflist_mtx);
	154	return -EBUSY;
	155	}
	156	}
	157	mutex_unlock(&sdata->local->iflist_mtx);
	158	}
	159
0ea3da64	160	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	161
74457641	162	if (!local->open_count) {
59cb300f	163	res = drv_start(local);
19ec690a AA	164	WARN_ON(res);
	165	if (res)
	166	goto err;
	167	}
	168
74457641	169	local->open_count++;
19ec690a AA	170	netif_start_queue(dev);
	171	return 0;
	172	err:
0ea3da64 AA	173	/* might already be clear but that doesn't matter */
0ea3da64 AA	174	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	175
	176	return res;
	177	}
	178
6ef0023a	179	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	180	{
e462ded6 PB	181	int rc;
59d19cd7	182	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
59cb300f	183	struct ieee802154_local *local = sdata->local;
863e88f2	184	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
04e850fe	185	struct wpan_phy *phy = sdata->local->phy;
e462ded6 PB	186
	187	rc = mac802154_slave_open(dev);
	188	if (rc < 0)
	189	return rc;
	190
	191	mutex_lock(&phy->pib_lock);
	192
38130c31	193	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
863e88f2 AA	194	rc = drv_set_promiscuous_mode(local,
863e88f2 AA	195	wpan_dev->promiscuous_mode);
38130c31 AA	196	if (rc < 0)
	197	goto out;
	198	}
	199
776e59de	200	if (local->hw.flags & IEEE802154_HW_AFILT) {
863e88f2	201	rc = drv_set_pan_id(local, wpan_dev->pan_id);
50c79075 AA	202	if (rc < 0)
	203	goto out;
	204
863e88f2	205	rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
776e59de AA	206	if (rc < 0)
776e59de AA	207	goto out;
78b4bad1	208
863e88f2	209	rc = drv_set_short_addr(local, wpan_dev->short_addr);
78b4bad1 AA	210	if (rc < 0)
78b4bad1 AA	211	goto out;
776e59de AA	212	}
776e59de AA	213
a543c598	214	if (local->hw.flags & IEEE802154_HW_LBT) {
5fb3f026	215	rc = drv_set_lbt_mode(local, wpan_dev->lbt);
e462ded6 PB	216	if (rc < 0)
	217	goto out;
	218	}
	219
a543c598	220	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
5fb3f026 AA	221	rc = drv_set_csma_params(local, wpan_dev->min_be,
	222	wpan_dev->max_be,
	223	wpan_dev->csma_retries);
e462ded6 PB	224	if (rc < 0)
	225	goto out;
	226	}
	227
a543c598	228	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
5fb3f026	229	rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
e462ded6 PB	230	if (rc < 0)
	231	goto out;
	232	}
	233
	234	mutex_unlock(&phy->pib_lock);
	235	return 0;
	236
	237	out:
	238	mutex_unlock(&phy->pib_lock);
	239	return rc;
	240	}
	241
19ec690a AA	242	static int mac802154_slave_close(struct net_device *dev)
	243	{
	244	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	245	struct ieee802154_local *local = sdata->local;
	246
	247	ASSERT_RTNL();
	248
61f2dcba AA	249	hrtimer_cancel(&local->ifs_timer);
61f2dcba AA	250
19ec690a	251	netif_stop_queue(dev);
74457641	252	local->open_count--;
19ec690a	253
0ea3da64	254	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	255
74457641	256	if (!local->open_count)
59cb300f	257	drv_stop(local);
19ec690a AA	258
	259	return 0;
	260	}
	261
036562f9	262	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	263	struct ieee802154_hdr *hdr,
	264	const struct ieee802154_mac_cb *cb)
	265	{
	266	struct ieee802154_llsec_params params;
	267	u8 level;
	268
036562f9	269	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	270
	271	if (!params.enabled && cb->secen_override && cb->secen)
	272	return -EINVAL;
	273	if (!params.enabled \|\|
	274	(cb->secen_override && !cb->secen) \|\|
	275	!params.out_level)
	276	return 0;
	277	if (cb->seclevel_override && !cb->seclevel)
	278	return -EINVAL;
	279
	280	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	281
	282	hdr->fc.security_enabled = 1;
	283	hdr->sec.level = level;
	284	hdr->sec.key_id_mode = params.out_key.mode;
	285	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	286	hdr->sec.short_src = params.out_key.short_source;
	287	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	288	hdr->sec.extended_src = params.out_key.extended_source;
	289	hdr->sec.key_id = params.out_key.id;
	290
	291	return 0;
	292	}
	293
32bad7e3	294	static int mac802154_header_create(struct sk_buff *skb,
	295	struct net_device *dev,
	296	unsigned short type,
e6278d92 PB	297	const void *daddr,
e6278d92 PB	298	const void *saddr,
32bad7e3	299	unsigned len)
32bad7e3	300	{
e6278d92	301	struct ieee802154_hdr hdr;
59d19cd7	302	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
863e88f2	303	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
32edc40a	304	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	305	int hlen;
32bad7e3	306
	307	if (!daddr)
	308	return -EINVAL;
	309
e6278d92	310	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	311	hdr.fc.type = cb->type;
	312	hdr.fc.security_enabled = cb->secen;
	313	hdr.fc.ack_request = cb->ackreq;
	314	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
32bad7e3	315
036562f9	316	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	317	return -EINVAL;
f30be4d5 PB	318
32bad7e3	319	if (!saddr) {
036562f9	320	spin_lock_bh(&sdata->mib_lock);
32bad7e3	321
863e88f2 AA	322	if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	323	wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	324	wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	325	hdr.source.mode = IEEE802154_ADDR_LONG;
863e88f2	326	hdr.source.extended_addr = wpan_dev->extended_addr;
32bad7e3	327	} else {
e6278d92	328	hdr.source.mode = IEEE802154_ADDR_SHORT;
863e88f2	329	hdr.source.short_addr = wpan_dev->short_addr;
32bad7e3	330	}
32bad7e3	331
863e88f2	332	hdr.source.pan_id = wpan_dev->pan_id;
32bad7e3	333
036562f9	334	spin_unlock_bh(&sdata->mib_lock);
e6278d92 PB	335	} else {
e6278d92 PB	336	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	337	}
32bad7e3	338
e6278d92	339	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	340
e6278d92 PB	341	hlen = ieee802154_hdr_push(skb, &hdr);
	342	if (hlen < 0)
	343	return -EINVAL;
32bad7e3	344
3e69162e	345	skb_reset_mac_header(skb);
e6278d92	346	skb->mac_len = hlen;
32bad7e3	347
8c84296f	348	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	349	return -EMSGSIZE;
d1d7358e PB	350
e6278d92	351	return hlen;
32bad7e3	352	}
	353
	354	static int
	355	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	356	{
e6278d92 PB	357	struct ieee802154_hdr hdr;
e6278d92 PB	358	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	359
e6278d92 PB	360	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	361	pr_debug("malformed packet\n");
	362	return 0;
32bad7e3	363	}
32bad7e3	364
e6278d92 PB	365	*addr = hdr.source;
e6278d92 PB	366	return sizeof(*addr);
32bad7e3	367	}
32bad7e3	368
32bad7e3	369	static struct header_ops mac802154_header_ops = {
	370	.create = mac802154_header_create,
	371	.parse = mac802154_header_parse,
	372	};
	373
	374	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	375	.ndo_open = mac802154_wpan_open,
32bad7e3	376	.ndo_stop = mac802154_slave_close,
e5e584fc	377	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	378	.ndo_do_ioctl = mac802154_wpan_ioctl,
	379	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	380	};
	381
b9ff77e5	382	static const struct net_device_ops mac802154_monitor_ops = {
38130c31	383	.ndo_open = mac802154_wpan_open,
b9ff77e5 AA	384	.ndo_stop = mac802154_slave_close,
	385	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	386	};
	387
f30be4d5 PB	388	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	389	{
59d19cd7	390	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	391
036562f9	392	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	393
	394	free_netdev(dev);
	395	}
	396
d5ae67ba	397	static void ieee802154_if_setup(struct net_device *dev)
32bad7e3	398	{
e57a8946 AA	399	dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
e57a8946 AA	400	memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
32bad7e3	401
32bad7e3	402	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
f30be4d5	403	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	404	dev->mtu = IEEE802154_MTU;
e937f583	405	dev->tx_queue_len = 300;
32bad7e3	406	dev->flags = IFF_NOARP \| IFF_BROADCAST;
d5ae67ba	407	}
32bad7e3	408
d5ae67ba AA	409	static int
	410	ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, int type)
	411	{
863e88f2 AA	412	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
863e88f2 AA	413
d5ae67ba	414	/* set some type-dependent values */
7c118c1a	415	sdata->vif.type = type;
190ac1ca	416	sdata->wpan_dev.iftype = type;
32bad7e3	417
863e88f2 AA	418	get_random_bytes(&wpan_dev->bsn, 1);
863e88f2 AA	419	get_random_bytes(&wpan_dev->dsn, 1);
32bad7e3	420
e462ded6	421	/* defaults per 802.15.4-2011 */
5fb3f026 AA	422	wpan_dev->min_be = 3;
	423	wpan_dev->max_be = 5;
	424	wpan_dev->csma_retries = 4;
036562f9	425	/* for compatibility, actual default is 3 */
5fb3f026	426	wpan_dev->frame_retries = -1;
e462ded6	427
863e88f2 AA	428	wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
863e88f2 AA	429	wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	430
d5ae67ba AA	431	switch (type) {
d5ae67ba AA	432	case IEEE802154_DEV_WPAN:
b03c9ccc AA	433	ieee802154_be64_to_le64(&wpan_dev->extended_addr,
	434	sdata->dev->dev_addr);
	435
d5ae67ba AA	436	sdata->dev->header_ops = &mac802154_header_ops;
	437	sdata->dev->destructor = mac802154_wpan_free;
	438	sdata->dev->netdev_ops = &mac802154_wpan_ops;
	439	sdata->dev->ml_priv = &mac802154_mlme_wpan;
863e88f2	440	wpan_dev->promiscuous_mode = false;
986a8abf	441
d5ae67ba AA	442	spin_lock_init(&sdata->mib_lock);
d5ae67ba AA	443	mutex_init(&sdata->sec_mtx);
986a8abf	444
d5ae67ba AA	445	mac802154_llsec_init(&sdata->sec);
	446	break;
	447	case IEEE802154_DEV_MONITOR:
	448	sdata->dev->destructor = free_netdev;
	449	sdata->dev->netdev_ops = &mac802154_monitor_ops;
863e88f2	450	wpan_dev->promiscuous_mode = true;
d5ae67ba AA	451	break;
	452	default:
	453	BUG();
	454	}
986a8abf AA	455
	456	return 0;
	457	}
	458
	459	struct net_device *
	460	ieee802154_if_add(struct ieee802154_local local, const char name,
	461	struct wpan_dev **new_wpan_dev, int type)
	462	{
d5ae67ba AA	463	struct net_device *ndev = NULL;
	464	struct ieee802154_sub_if_data *sdata = NULL;
	465	int ret = -ENOMEM;
	466
	467	ASSERT_RTNL();
	468
7c118c1a AA	469	ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
7c118c1a AA	470	NET_NAME_UNKNOWN, ieee802154_if_setup);
d5ae67ba AA	471	if (!ndev)
	472	return ERR_PTR(-ENOMEM);
	473
	474	ndev->needed_headroom = local->hw.extra_tx_headroom;
	475
	476	ret = dev_alloc_name(ndev, ndev->name);
	477	if (ret < 0)
	478	goto err;
986a8abf AA	479
986a8abf AA	480	switch (type) {
986a8abf	481	case IEEE802154_DEV_WPAN:
d5ae67ba	482	ndev->type = ARPHRD_IEEE802154;
986a8abf	483	break;
d5ae67ba AA	484	case IEEE802154_DEV_MONITOR:
d5ae67ba AA	485	ndev->type = ARPHRD_IEEE802154_MONITOR;
986a8abf	486	break;
d5ae67ba AA	487	default:
	488	ret = -EINVAL;
	489	goto err;
986a8abf	490	}
d5ae67ba	491
dee56d14 AA	492	ieee802154_le64_to_be64(ndev->perm_addr,
	493	&local->hw.phy->perm_extended_addr);
	494	memcpy(ndev->dev_addr, ndev->perm_addr, IEEE802154_EXTENDED_ADDR_LEN);
d5ae67ba AA	495	/* TODO check this */
	496	SET_NETDEV_DEV(ndev, &local->phy->dev);
	497	sdata = netdev_priv(ndev);
	498	ndev->ieee802154_ptr = &sdata->wpan_dev;
	499	memcpy(sdata->name, ndev->name, IFNAMSIZ);
	500	sdata->dev = ndev;
	501	sdata->wpan_dev.wpan_phy = local->hw.phy;
	502	sdata->local = local;
	503
	504	/* setup type-dependent data */
	505	ret = ieee802154_setup_sdata(sdata, type);
	506	if (ret)
986a8abf AA	507	goto err;
986a8abf AA	508
d5ae67ba AA	509	if (ndev) {
	510	ret = register_netdevice(ndev);
	511	if (ret < 0)
	512	goto err;
	513	}
	514
	515	mutex_lock(&local->iflist_mtx);
	516	list_add_tail_rcu(&sdata->list, &local->interfaces);
	517	mutex_unlock(&local->iflist_mtx);
986a8abf	518
d5ae67ba AA	519	if (new_wpan_dev)
	520	*new_wpan_dev = &sdata->wpan_dev;
	521
	522	return ndev;
986a8abf	523
986a8abf	524	err:
d5ae67ba AA	525	free_netdev(ndev);
d5ae67ba AA	526	return ERR_PTR(ret);
986a8abf AA	527	}
986a8abf AA	528
b210b187 AA	529	void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
	530	{
	531	ASSERT_RTNL();
	532
	533	mutex_lock(&sdata->local->iflist_mtx);
	534	list_del_rcu(&sdata->list);
	535	mutex_unlock(&sdata->local->iflist_mtx);
	536
	537	synchronize_rcu();
	538	unregister_netdevice(sdata->dev);
	539	}
592dfbfc AA	540
	541	void ieee802154_remove_interfaces(struct ieee802154_local *local)
	542	{
d14e1c71	543	struct ieee802154_sub_if_data sdata, tmp;
592dfbfc	544
2789e629	545	mutex_lock(&local->iflist_mtx);
d14e1c71	546	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
592dfbfc	547	list_del(&sdata->list);
592dfbfc AA	548
	549	unregister_netdevice(sdata->dev);
	550	}
2789e629	551	mutex_unlock(&local->iflist_mtx);
592dfbfc	552	}
be4fd8e5 AA	553
	554	static int netdev_notify(struct notifier_block *nb,
	555	unsigned long state, void *ptr)
	556	{
	557	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	558	struct ieee802154_sub_if_data *sdata;
	559
	560	if (state != NETDEV_CHANGENAME)
	561	return NOTIFY_DONE;
	562
	563	if (!dev->ieee802154_ptr \|\| !dev->ieee802154_ptr->wpan_phy)
	564	return NOTIFY_DONE;
	565
	566	if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
	567	return NOTIFY_DONE;
	568
	569	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	570	memcpy(sdata->name, dev->name, IFNAMSIZ);
	571
	572	return NOTIFY_OK;
	573	}
	574
	575	static struct notifier_block mac802154_netdev_notifier = {
	576	.notifier_call = netdev_notify,
	577	};
	578
	579	int ieee802154_iface_init(void)
	580	{
	581	return register_netdevice_notifier(&mac802154_netdev_notifier);
	582	}
	583
	584	void ieee802154_iface_exit(void)
	585	{
	586	unregister_netdevice_notifier(&mac802154_netdev_notifier);
	587	}