[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 ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	struct sockaddr *addr = p;
	__le64 extended_addr;

	if (netif_running(dev))
		return -EBUSY;

	extended_addr = ieee802154_netdev_to_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->extended_addr = extended_addr;

	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_PROMISCUOUS) {
		rc = drv_set_promiscuous_mode(local, sdata->promisuous_mode);
		if (rc < 0)
			goto out;
	}

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

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

		rc = drv_set_short_addr(local, sdata->short_addr);
		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_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_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);
}

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);

	sdata->promisuous_mode = false;

	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;

	sdata->promisuous_mode = true;
}
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	{
776e59de	113	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32bad7e3	114	struct sockaddr *addr = p;
ea7053c1	115	__le64 extended_addr;
32bad7e3	116
	117	if (netif_running(dev))
	118	return -EBUSY;
	119
ea7053c1 AA	120	extended_addr = ieee802154_netdev_to_extended_addr(addr->sa_data);
	121	if (!ieee802154_is_valid_extended_addr(extended_addr))
	122	return -EINVAL;
	123
32bad7e3	124	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
ea7053c1	125	sdata->extended_addr = extended_addr;
776e59de	126
9b0bb4a8	127	return mac802154_wpan_update_llsec(dev);
32bad7e3	128	}
32bad7e3	129
e462ded6 PB	130	int mac802154_set_mac_params(struct net_device *dev,
	131	const struct ieee802154_mac_params *params)
	132	{
59d19cd7	133	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
e462ded6	134
d98be45b	135	mutex_lock(&sdata->local->iflist_mtx);
036562f9	136	sdata->mac_params = *params;
d98be45b	137	mutex_unlock(&sdata->local->iflist_mtx);
e462ded6 PB	138
	139	return 0;
	140	}
	141
	142	void mac802154_get_mac_params(struct net_device *dev,
	143	struct ieee802154_mac_params *params)
	144	{
59d19cd7	145	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
e462ded6	146
d98be45b	147	mutex_lock(&sdata->local->iflist_mtx);
036562f9	148	*params = sdata->mac_params;
d98be45b	149	mutex_unlock(&sdata->local->iflist_mtx);
e462ded6 PB	150	}
e462ded6 PB	151
19ec690a AA	152	static int mac802154_slave_open(struct net_device *dev)
	153	{
	154	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	155	struct ieee802154_sub_if_data *subif;
	156	struct ieee802154_local *local = sdata->local;
	157	int res = 0;
	158
	159	ASSERT_RTNL();
	160
	161	if (sdata->type == IEEE802154_DEV_WPAN) {
	162	mutex_lock(&sdata->local->iflist_mtx);
	163	list_for_each_entry(subif, &sdata->local->interfaces, list) {
	164	if (subif != sdata && subif->type == sdata->type &&
0ea3da64	165	ieee802154_sdata_running(subif)) {
19ec690a AA	166	mutex_unlock(&sdata->local->iflist_mtx);
	167	return -EBUSY;
	168	}
	169	}
	170	mutex_unlock(&sdata->local->iflist_mtx);
	171	}
	172
0ea3da64	173	set_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	174
74457641	175	if (!local->open_count) {
59cb300f	176	res = drv_start(local);
19ec690a AA	177	WARN_ON(res);
	178	if (res)
	179	goto err;
	180	}
	181
74457641	182	local->open_count++;
19ec690a AA	183	netif_start_queue(dev);
	184	return 0;
	185	err:
0ea3da64 AA	186	/* might already be clear but that doesn't matter */
0ea3da64 AA	187	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a AA	188
	189	return res;
	190	}
	191
6ef0023a	192	static int mac802154_wpan_open(struct net_device *dev)
e462ded6 PB	193	{
e462ded6 PB	194	int rc;
59d19cd7	195	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
59cb300f	196	struct ieee802154_local *local = sdata->local;
04e850fe	197	struct wpan_phy *phy = sdata->local->phy;
e462ded6 PB	198
	199	rc = mac802154_slave_open(dev);
	200	if (rc < 0)
	201	return rc;
	202
	203	mutex_lock(&phy->pib_lock);
	204
38130c31 AA	205	if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
	206	rc = drv_set_promiscuous_mode(local, sdata->promisuous_mode);
	207	if (rc < 0)
	208	goto out;
	209	}
	210
776e59de	211	if (local->hw.flags & IEEE802154_HW_AFILT) {
50c79075 AA	212	rc = drv_set_pan_id(local, sdata->pan_id);
	213	if (rc < 0)
	214	goto out;
	215
776e59de AA	216	rc = drv_set_extended_addr(local, sdata->extended_addr);
	217	if (rc < 0)
	218	goto out;
78b4bad1 AA	219
	220	rc = drv_set_short_addr(local, sdata->short_addr);
	221	if (rc < 0)
	222	goto out;
776e59de AA	223	}
776e59de AA	224
a543c598	225	if (local->hw.flags & IEEE802154_HW_LBT) {
59cb300f	226	rc = drv_set_lbt_mode(local, sdata->mac_params.lbt);
e462ded6 PB	227	if (rc < 0)
	228	goto out;
	229	}
	230
a543c598	231	if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
59cb300f AA	232	rc = drv_set_csma_params(local, sdata->mac_params.min_be,
	233	sdata->mac_params.max_be,
	234	sdata->mac_params.csma_retries);
e462ded6 PB	235	if (rc < 0)
	236	goto out;
	237	}
	238
a543c598	239	if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
59cb300f AA	240	rc = drv_set_max_frame_retries(local,
59cb300f AA	241	sdata->mac_params.frame_retries);
e462ded6 PB	242	if (rc < 0)
	243	goto out;
	244	}
	245
	246	mutex_unlock(&phy->pib_lock);
	247	return 0;
	248
	249	out:
	250	mutex_unlock(&phy->pib_lock);
	251	return rc;
	252	}
	253
19ec690a AA	254	static int mac802154_slave_close(struct net_device *dev)
	255	{
	256	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	257	struct ieee802154_local *local = sdata->local;
	258
	259	ASSERT_RTNL();
	260
	261	netif_stop_queue(dev);
74457641	262	local->open_count--;
19ec690a	263
0ea3da64	264	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
19ec690a	265
74457641	266	if (!local->open_count)
59cb300f	267	drv_stop(local);
19ec690a AA	268
	269	return 0;
	270	}
	271
036562f9	272	static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
f30be4d5 PB	273	struct ieee802154_hdr *hdr,
	274	const struct ieee802154_mac_cb *cb)
	275	{
	276	struct ieee802154_llsec_params params;
	277	u8 level;
	278
036562f9	279	mac802154_llsec_get_params(&sdata->sec, &params);
f30be4d5 PB	280
	281	if (!params.enabled && cb->secen_override && cb->secen)
	282	return -EINVAL;
	283	if (!params.enabled \|\|
	284	(cb->secen_override && !cb->secen) \|\|
	285	!params.out_level)
	286	return 0;
	287	if (cb->seclevel_override && !cb->seclevel)
	288	return -EINVAL;
	289
	290	level = cb->seclevel_override ? cb->seclevel : params.out_level;
	291
	292	hdr->fc.security_enabled = 1;
	293	hdr->sec.level = level;
	294	hdr->sec.key_id_mode = params.out_key.mode;
	295	if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
	296	hdr->sec.short_src = params.out_key.short_source;
	297	else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
	298	hdr->sec.extended_src = params.out_key.extended_source;
	299	hdr->sec.key_id = params.out_key.id;
	300
	301	return 0;
	302	}
	303
32bad7e3	304	static int mac802154_header_create(struct sk_buff *skb,
	305	struct net_device *dev,
	306	unsigned short type,
e6278d92 PB	307	const void *daddr,
e6278d92 PB	308	const void *saddr,
32bad7e3	309	unsigned len)
32bad7e3	310	{
e6278d92	311	struct ieee802154_hdr hdr;
59d19cd7	312	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
32edc40a	313	struct ieee802154_mac_cb *cb = mac_cb(skb);
e6278d92	314	int hlen;
32bad7e3	315
	316	if (!daddr)
	317	return -EINVAL;
	318
e6278d92	319	memset(&hdr.fc, 0, sizeof(hdr.fc));
32edc40a PB	320	hdr.fc.type = cb->type;
	321	hdr.fc.security_enabled = cb->secen;
	322	hdr.fc.ack_request = cb->ackreq;
	323	hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
32bad7e3	324
036562f9	325	if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
f30be4d5 PB	326	return -EINVAL;
f30be4d5 PB	327
32bad7e3	328	if (!saddr) {
036562f9	329	spin_lock_bh(&sdata->mib_lock);
32bad7e3	330
036562f9 AA	331	if (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) \|\|
	332	sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) \|\|
	333	sdata->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
e6278d92	334	hdr.source.mode = IEEE802154_ADDR_LONG;
036562f9	335	hdr.source.extended_addr = sdata->extended_addr;
32bad7e3	336	} else {
e6278d92	337	hdr.source.mode = IEEE802154_ADDR_SHORT;
036562f9	338	hdr.source.short_addr = sdata->short_addr;
32bad7e3	339	}
32bad7e3	340
036562f9	341	hdr.source.pan_id = sdata->pan_id;
32bad7e3	342
036562f9	343	spin_unlock_bh(&sdata->mib_lock);
e6278d92 PB	344	} else {
e6278d92 PB	345	hdr.source = (const struct ieee802154_addr )saddr;
32bad7e3	346	}
32bad7e3	347
e6278d92	348	hdr.dest = (const struct ieee802154_addr )daddr;
32bad7e3	349
e6278d92 PB	350	hlen = ieee802154_hdr_push(skb, &hdr);
	351	if (hlen < 0)
	352	return -EINVAL;
32bad7e3	353
3e69162e	354	skb_reset_mac_header(skb);
e6278d92	355	skb->mac_len = hlen;
32bad7e3	356
8c84296f	357	if (len > ieee802154_max_payload(&hdr))
d1d7358e PB	358	return -EMSGSIZE;
d1d7358e PB	359
e6278d92	360	return hlen;
32bad7e3	361	}
	362
	363	static int
	364	mac802154_header_parse(const struct sk_buff skb, unsigned char haddr)
	365	{
e6278d92 PB	366	struct ieee802154_hdr hdr;
e6278d92 PB	367	struct ieee802154_addr addr = (struct ieee802154_addr )haddr;
32bad7e3	368
e6278d92 PB	369	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
	370	pr_debug("malformed packet\n");
	371	return 0;
32bad7e3	372	}
32bad7e3	373
e6278d92 PB	374	*addr = hdr.source;
e6278d92 PB	375	return sizeof(*addr);
32bad7e3	376	}
32bad7e3	377
32bad7e3	378	static struct header_ops mac802154_header_ops = {
	379	.create = mac802154_header_create,
	380	.parse = mac802154_header_parse,
	381	};
	382
	383	static const struct net_device_ops mac802154_wpan_ops = {
e462ded6	384	.ndo_open = mac802154_wpan_open,
32bad7e3	385	.ndo_stop = mac802154_slave_close,
e5e584fc	386	.ndo_start_xmit = ieee802154_subif_start_xmit,
32bad7e3	387	.ndo_do_ioctl = mac802154_wpan_ioctl,
	388	.ndo_set_mac_address = mac802154_wpan_mac_addr,
	389	};
	390
b9ff77e5	391	static const struct net_device_ops mac802154_monitor_ops = {
38130c31	392	.ndo_open = mac802154_wpan_open,
b9ff77e5 AA	393	.ndo_stop = mac802154_slave_close,
	394	.ndo_start_xmit = ieee802154_monitor_start_xmit,
	395	};
	396
f30be4d5 PB	397	static void mac802154_wpan_free(struct net_device *dev)
f30be4d5 PB	398	{
59d19cd7	399	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
f30be4d5	400
036562f9	401	mac802154_llsec_destroy(&sdata->sec);
f30be4d5 PB	402
	403	free_netdev(dev);
	404	}
	405
32bad7e3	406	void mac802154_wpan_setup(struct net_device *dev)
32bad7e3	407	{
036562f9	408	struct ieee802154_sub_if_data *sdata;
32bad7e3	409
	410	dev->addr_len = IEEE802154_ADDR_LEN;
	411	memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
	412
	413	dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
	414	dev->header_ops = &mac802154_header_ops;
f30be4d5	415	dev->needed_tailroom = 2 + 16; /* FCS + MIC */
32bad7e3	416	dev->mtu = IEEE802154_MTU;
e937f583	417	dev->tx_queue_len = 300;
32bad7e3	418	dev->type = ARPHRD_IEEE802154;
32bad7e3	419	dev->flags = IFF_NOARP \| IFF_BROADCAST;
32bad7e3	420
f30be4d5	421	dev->destructor = mac802154_wpan_free;
32bad7e3	422	dev->netdev_ops = &mac802154_wpan_ops;
	423	dev->ml_priv = &mac802154_mlme_wpan;
	424
59d19cd7	425	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
036562f9	426	sdata->type = IEEE802154_DEV_WPAN;
32bad7e3	427
036562f9 AA	428	spin_lock_init(&sdata->mib_lock);
036562f9 AA	429	mutex_init(&sdata->sec_mtx);
32bad7e3	430
036562f9 AA	431	get_random_bytes(&sdata->bsn, 1);
036562f9 AA	432	get_random_bytes(&sdata->dsn, 1);
32bad7e3	433
e462ded6	434	/* defaults per 802.15.4-2011 */
036562f9 AA	435	sdata->mac_params.min_be = 3;
	436	sdata->mac_params.max_be = 5;
	437	sdata->mac_params.csma_retries = 4;
	438	/* for compatibility, actual default is 3 */
	439	sdata->mac_params.frame_retries = -1;
e462ded6	440
036562f9 AA	441	sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
036562f9 AA	442	sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
f30be4d5	443
38130c31 AA	444	sdata->promisuous_mode = false;
38130c31 AA	445
036562f9	446	mac802154_llsec_init(&sdata->sec);
32bad7e3	447	}
b9ff77e5 AA	448
	449	void mac802154_monitor_setup(struct net_device *dev)
	450	{
	451	struct ieee802154_sub_if_data *sdata;
	452
b9ff77e5 AA	453	dev->needed_tailroom = 2; /* room for FCS */
	454	dev->mtu = IEEE802154_MTU;
	455	dev->tx_queue_len = 10;
	456	dev->type = ARPHRD_IEEE802154_MONITOR;
	457	dev->flags = IFF_NOARP \| IFF_BROADCAST;
b9ff77e5 AA	458
	459	dev->destructor = free_netdev;
	460	dev->netdev_ops = &mac802154_monitor_ops;
	461	dev->ml_priv = &mac802154_mlme_reduced;
	462
	463	sdata = IEEE802154_DEV_TO_SUB_IF(dev);
	464	sdata->type = IEEE802154_DEV_MONITOR;
38130c31 AA	465
38130c31 AA	466	sdata->promisuous_mode = true;
b9ff77e5	467	}