[net-next-2.6.git] / net / ieee802154 / dgram.c

/*
 * ZigBee socket interface
 *
 * Copyright 2007, 2008 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Written by:
 * Sergey Lapin <slapin@ossfans.org>
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 */

#include <linux/net.h>
#include <linux/module.h>
#include <linux/if_arp.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <net/sock.h>
#include <net/af_ieee802154.h>
#include <net/ieee802154.h>
#include <net/ieee802154_netdev.h>

#include <asm/ioctls.h>

#include "af802154.h"

static HLIST_HEAD(dgram_head);
static DEFINE_RWLOCK(dgram_lock);

struct dgram_sock {
	struct sock sk;

	struct ieee802154_addr src_addr;
	struct ieee802154_addr dst_addr;

	unsigned bound:1;
	unsigned want_ack:1;
};

static inline struct dgram_sock *dgram_sk(const struct sock *sk)
{
	return container_of(sk, struct dgram_sock, sk);
}

static void dgram_hash(struct sock *sk)
{
	write_lock_bh(&dgram_lock);
	sk_add_node(sk, &dgram_head);
	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
	write_unlock_bh(&dgram_lock);
}

static void dgram_unhash(struct sock *sk)
{
	write_lock_bh(&dgram_lock);
	if (sk_del_node_init(sk))
		sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
	write_unlock_bh(&dgram_lock);
}

static int dgram_init(struct sock *sk)
{
	struct dgram_sock *ro = dgram_sk(sk);

	ro->dst_addr.addr_type = IEEE802154_ADDR_LONG;
	ro->dst_addr.pan_id = 0xffff;
	ro->want_ack = 1;
	memset(&ro->dst_addr.hwaddr, 0xff, sizeof(ro->dst_addr.hwaddr));
	return 0;
}

static void dgram_close(struct sock *sk, long timeout)
{
	sk_common_release(sk);
}

static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len)
{
	struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
	struct dgram_sock *ro = dgram_sk(sk);
	int err = -EINVAL;
	struct net_device *dev;

	lock_sock(sk);

	ro->bound = 0;

	if (len < sizeof(*addr))
		goto out;

	if (addr->family != AF_IEEE802154)
		goto out;

	dev = ieee802154_get_dev(sock_net(sk), &addr->addr);
	if (!dev) {
		err = -ENODEV;
		goto out;
	}

	if (dev->type != ARPHRD_IEEE802154) {
		err = -ENODEV;
		goto out_put;
	}

	memcpy(&ro->src_addr, &addr->addr, sizeof(struct ieee802154_addr));

	ro->bound = 1;
	err = 0;
out_put:
	dev_put(dev);
out:
	release_sock(sk);

	return err;
}

static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg)
{
	switch (cmd) {
	case SIOCOUTQ:
	{
		int amount = sk_wmem_alloc_get(sk);

		return put_user(amount, (int __user *)arg);
	}

	case SIOCINQ:
	{
		struct sk_buff *skb;
		unsigned long amount;

		amount = 0;
		spin_lock_bh(&sk->sk_receive_queue.lock);
		skb = skb_peek(&sk->sk_receive_queue);
		if (skb != NULL) {
			/*
			 * We will only return the amount
			 * of this packet since that is all
			 * that will be read.
			 */
			/* FIXME: parse the header for more correct value */
			amount = skb->len - (3+8+8);
		}
		spin_unlock_bh(&sk->sk_receive_queue.lock);
		return put_user(amount, (int __user *)arg);
	}

	}
	return -ENOIOCTLCMD;
}

/* FIXME: autobind */
static int dgram_connect(struct sock *sk, struct sockaddr *uaddr,
			int len)
{
	struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr;
	struct dgram_sock *ro = dgram_sk(sk);
	int err = 0;

	if (len < sizeof(*addr))
		return -EINVAL;

	if (addr->family != AF_IEEE802154)
		return -EINVAL;

	lock_sock(sk);

	if (!ro->bound) {
		err = -ENETUNREACH;
		goto out;
	}

	memcpy(&ro->dst_addr, &addr->addr, sizeof(struct ieee802154_addr));

out:
	release_sock(sk);
	return err;
}

static int dgram_disconnect(struct sock *sk, int flags)
{
	struct dgram_sock *ro = dgram_sk(sk);

	lock_sock(sk);

	ro->dst_addr.addr_type = IEEE802154_ADDR_LONG;
	memset(&ro->dst_addr.hwaddr, 0xff, sizeof(ro->dst_addr.hwaddr));

	release_sock(sk);

	return 0;
}

static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk,
		struct msghdr *msg, size_t size)
{
	struct net_device *dev;
	unsigned mtu;
	struct sk_buff *skb;
	struct dgram_sock *ro = dgram_sk(sk);
	int err;

	if (msg->msg_flags & MSG_OOB) {
		pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
		return -EOPNOTSUPP;
	}

	if (!ro->bound)
		dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
	else
		dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);

	if (!dev) {
		pr_debug("no dev\n");
		err = -ENXIO;
		goto out;
	}
	mtu = dev->mtu;
	pr_debug("name = %s, mtu = %u\n", dev->name, mtu);

	skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
			msg->msg_flags & MSG_DONTWAIT,
			&err);
	if (!skb)
		goto out_dev;

	skb_reserve(skb, LL_RESERVED_SPACE(dev));

	skb_reset_network_header(skb);

	mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
	if (ro->want_ack)
		mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ;

	mac_cb(skb)->seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
	err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &ro->dst_addr,
			ro->bound ? &ro->src_addr : NULL, size);
	if (err < 0)
		goto out_skb;

	skb_reset_mac_header(skb);

	err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
	if (err < 0)
		goto out_skb;

	if (size > mtu) {
		pr_debug("size = %Zu, mtu = %u\n", size, mtu);
		err = -EINVAL;
		goto out_skb;
	}

	skb->dev = dev;
	skb->sk  = sk;
	skb->protocol = htons(ETH_P_IEEE802154);

	dev_put(dev);

	err = dev_queue_xmit(skb);
	if (err > 0)
		err = net_xmit_errno(err);

	return err ?: size;

out_skb:
	kfree_skb(skb);
out_dev:
	dev_put(dev);
out:
	return err;
}

static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
		struct msghdr *msg, size_t len, int noblock, int flags,
		int *addr_len)
{
	size_t copied = 0;
	int err = -EOPNOTSUPP;
	struct sk_buff *skb;

	skb = skb_recv_datagram(sk, flags, noblock, &err);
	if (!skb)
		goto out;

	copied = skb->len;
	if (len < copied) {
		msg->msg_flags |= MSG_TRUNC;
		copied = len;
	}

	/* FIXME: skip headers if necessary ?! */
	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	if (err)
		goto done;

	sock_recv_ts_and_drops(msg, sk, skb);

	if (flags & MSG_TRUNC)
		copied = skb->len;
done:
	skb_free_datagram(sk, skb);
out:
	if (err)
		return err;
	return copied;
}

static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
	if (sock_queue_rcv_skb(sk, skb) < 0) {
		kfree_skb(skb);
		return NET_RX_DROP;
	}

	return NET_RX_SUCCESS;
}

static inline int ieee802154_match_sock(u8 *hw_addr, u16 pan_id,
		u16 short_addr, struct dgram_sock *ro)
{
	if (!ro->bound)
		return 1;

	if (ro->src_addr.addr_type == IEEE802154_ADDR_LONG &&
	    !memcmp(ro->src_addr.hwaddr, hw_addr, IEEE802154_ADDR_LEN))
		return 1;

	if (ro->src_addr.addr_type == IEEE802154_ADDR_SHORT &&
		     pan_id == ro->src_addr.pan_id &&
		     short_addr == ro->src_addr.short_addr)
		return 1;

	return 0;
}

int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb)
{
	struct sock *sk, *prev = NULL;
	struct hlist_node *node;
	int ret = NET_RX_SUCCESS;
	u16 pan_id, short_addr;

	/* Data frame processing */
	BUG_ON(dev->type != ARPHRD_IEEE802154);

	pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
	short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);

	read_lock(&dgram_lock);
	sk_for_each(sk, node, &dgram_head) {
		if (ieee802154_match_sock(dev->dev_addr, pan_id, short_addr,
					dgram_sk(sk))) {
			if (prev) {
				struct sk_buff *clone;
				clone = skb_clone(skb, GFP_ATOMIC);
				if (clone)
					dgram_rcv_skb(prev, clone);
			}

			prev = sk;
		}
	}

	if (prev)
		dgram_rcv_skb(prev, skb);
	else {
		kfree_skb(skb);
		ret = NET_RX_DROP;
	}
	read_unlock(&dgram_lock);

	return ret;
}

static int dgram_getsockopt(struct sock *sk, int level, int optname,
		    char __user *optval, int __user *optlen)
{
	struct dgram_sock *ro = dgram_sk(sk);

	int val, len;

	if (level != SOL_IEEE802154)
		return -EOPNOTSUPP;

	if (get_user(len, optlen))
		return -EFAULT;

	len = min_t(unsigned int, len, sizeof(int));

	switch (optname) {
	case WPAN_WANTACK:
		val = ro->want_ack;
		break;
	default:
		return -ENOPROTOOPT;
	}

	if (put_user(len, optlen))
		return -EFAULT;
	if (copy_to_user(optval, &val, len))
		return -EFAULT;
	return 0;
}

static int dgram_setsockopt(struct sock *sk, int level, int optname,
		    char __user *optval, unsigned int optlen)
{
	struct dgram_sock *ro = dgram_sk(sk);
	int val;
	int err = 0;

	if (optlen < sizeof(int))
		return -EINVAL;

	if (get_user(val, (int __user *)optval))
		return -EFAULT;

	lock_sock(sk);

	switch (optname) {
	case WPAN_WANTACK:
		ro->want_ack = !!val;
		break;
	default:
		err = -ENOPROTOOPT;
		break;
	}

	release_sock(sk);
	return err;
}

struct proto ieee802154_dgram_prot = {
	.name		= "IEEE-802.15.4-MAC",
	.owner		= THIS_MODULE,
	.obj_size	= sizeof(struct dgram_sock),
	.init		= dgram_init,
	.close		= dgram_close,
	.bind		= dgram_bind,
	.sendmsg	= dgram_sendmsg,
	.recvmsg	= dgram_recvmsg,
	.hash		= dgram_hash,
	.unhash		= dgram_unhash,
	.connect	= dgram_connect,
	.disconnect	= dgram_disconnect,
	.ioctl		= dgram_ioctl,
	.getsockopt	= dgram_getsockopt,
	.setsockopt	= dgram_setsockopt,
};
Commit	Line	Data
9ec76716 SL	1	/*
	2	* ZigBee socket interface
	3	*
	4	* Copyright 2007, 2008 Siemens AG
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*
	19	* Written by:
	20	* Sergey Lapin <slapin@ossfans.org>
	21	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
	22	*/
	23
	24	#include <linux/net.h>
	25	#include <linux/module.h>
	26	#include <linux/if_arp.h>
	27	#include <linux/list.h>
5a0e3ad6	28	#include <linux/slab.h>
9ec76716	29	#include <net/sock.h>
f0166e5e DES	30	#include <net/af_ieee802154.h>
	31	#include <net/ieee802154.h>
	32	#include <net/ieee802154_netdev.h>
9ec76716 SL	33
	34	#include <asm/ioctls.h>
	35
	36	#include "af802154.h"
	37
	38	static HLIST_HEAD(dgram_head);
	39	static DEFINE_RWLOCK(dgram_lock);
	40
	41	struct dgram_sock {
	42	struct sock sk;
	43
9ec76716 SL	44	struct ieee802154_addr src_addr;
9ec76716 SL	45	struct ieee802154_addr dst_addr;
74eda55d DES	46
74eda55d DES	47	unsigned bound:1;
99eb8558	48	unsigned want_ack:1;
9ec76716 SL	49	};
	50
	51	static inline struct dgram_sock dgram_sk(const struct sock sk)
	52	{
	53	return container_of(sk, struct dgram_sock, sk);
	54	}
	55
9ec76716 SL	56	static void dgram_hash(struct sock *sk)
	57	{
	58	write_lock_bh(&dgram_lock);
	59	sk_add_node(sk, &dgram_head);
	60	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
	61	write_unlock_bh(&dgram_lock);
	62	}
	63
	64	static void dgram_unhash(struct sock *sk)
	65	{
	66	write_lock_bh(&dgram_lock);
	67	if (sk_del_node_init(sk))
	68	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
	69	write_unlock_bh(&dgram_lock);
	70	}
	71
	72	static int dgram_init(struct sock *sk)
	73	{
	74	struct dgram_sock *ro = dgram_sk(sk);
	75
	76	ro->dst_addr.addr_type = IEEE802154_ADDR_LONG;
	77	ro->dst_addr.pan_id = 0xffff;
99eb8558	78	ro->want_ack = 1;
9ec76716 SL	79	memset(&ro->dst_addr.hwaddr, 0xff, sizeof(ro->dst_addr.hwaddr));
	80	return 0;
	81	}
	82
	83	static void dgram_close(struct sock *sk, long timeout)
	84	{
	85	sk_common_release(sk);
	86	}
	87
	88	static int dgram_bind(struct sock sk, struct sockaddr uaddr, int len)
	89	{
	90	struct sockaddr_ieee802154 addr = (struct sockaddr_ieee802154 )uaddr;
	91	struct dgram_sock *ro = dgram_sk(sk);
74eda55d	92	int err = -EINVAL;
9ec76716 SL	93	struct net_device *dev;
9ec76716 SL	94
74eda55d DES	95	lock_sock(sk);
74eda55d DES	96
9ec76716 SL	97	ro->bound = 0;
	98
	99	if (len < sizeof(*addr))
74eda55d	100	goto out;
9ec76716 SL	101
9ec76716 SL	102	if (addr->family != AF_IEEE802154)
74eda55d	103	goto out;
9ec76716 SL	104
	105	dev = ieee802154_get_dev(sock_net(sk), &addr->addr);
	106	if (!dev) {
	107	err = -ENODEV;
	108	goto out;
	109	}
	110
	111	if (dev->type != ARPHRD_IEEE802154) {
	112	err = -ENODEV;
	113	goto out_put;
	114	}
	115
	116	memcpy(&ro->src_addr, &addr->addr, sizeof(struct ieee802154_addr));
	117
	118	ro->bound = 1;
74eda55d	119	err = 0;
9ec76716 SL	120	out_put:
	121	dev_put(dev);
	122	out:
	123	release_sock(sk);
	124
	125	return err;
	126	}
	127
	128	static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg)
	129	{
	130	switch (cmd) {
	131	case SIOCOUTQ:
	132	{
31e6d363 ED	133	int amount = sk_wmem_alloc_get(sk);
31e6d363 ED	134
9ec76716 SL	135	return put_user(amount, (int __user *)arg);
	136	}
	137
	138	case SIOCINQ:
	139	{
	140	struct sk_buff *skb;
	141	unsigned long amount;
	142
	143	amount = 0;
	144	spin_lock_bh(&sk->sk_receive_queue.lock);
	145	skb = skb_peek(&sk->sk_receive_queue);
	146	if (skb != NULL) {
	147	/*
	148	* We will only return the amount
	149	* of this packet since that is all
	150	* that will be read.
	151	*/
	152	/* FIXME: parse the header for more correct value */
	153	amount = skb->len - (3+8+8);
	154	}
	155	spin_unlock_bh(&sk->sk_receive_queue.lock);
	156	return put_user(amount, (int __user *)arg);
	157	}
	158
	159	}
	160	return -ENOIOCTLCMD;
	161	}
	162
	163	/* FIXME: autobind */
	164	static int dgram_connect(struct sock sk, struct sockaddr uaddr,
	165	int len)
	166	{
	167	struct sockaddr_ieee802154 addr = (struct sockaddr_ieee802154 )uaddr;
	168	struct dgram_sock *ro = dgram_sk(sk);
	169	int err = 0;
	170
	171	if (len < sizeof(*addr))
	172	return -EINVAL;
	173
	174	if (addr->family != AF_IEEE802154)
	175	return -EINVAL;
	176
	177	lock_sock(sk);
	178
	179	if (!ro->bound) {
	180	err = -ENETUNREACH;
	181	goto out;
	182	}
	183
	184	memcpy(&ro->dst_addr, &addr->addr, sizeof(struct ieee802154_addr));
	185
	186	out:
	187	release_sock(sk);
	188	return err;
	189	}
	190
	191	static int dgram_disconnect(struct sock *sk, int flags)
	192	{
	193	struct dgram_sock *ro = dgram_sk(sk);
	194
	195	lock_sock(sk);
	196
	197	ro->dst_addr.addr_type = IEEE802154_ADDR_LONG;
	198	memset(&ro->dst_addr.hwaddr, 0xff, sizeof(ro->dst_addr.hwaddr));
199
200	release_sock(sk);
201
202	return 0;
203	}
204
205	static int dgram_sendmsg(struct kiocb iocb, struct sock sk,
206	struct msghdr *msg, size_t size)
207	{
208	struct net_device *dev;
209	unsigned mtu;
210	struct sk_buff *skb;
211	struct dgram_sock *ro = dgram_sk(sk);
212	int err;
213
214	if (msg->msg_flags & MSG_OOB) {
215	pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
216	return -EOPNOTSUPP;
217	}
218
219	if (!ro->bound)
220	dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
221	else
222	dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
223
224	if (!dev) {
225	pr_debug("no dev\n");
226	err = -ENXIO;
227	goto out;
228	}
229	mtu = dev->mtu;
230	pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
231
232	skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + size,
233	msg->msg_flags & MSG_DONTWAIT,
234	&err);
235	if (!skb)
236	goto out_dev;
237
238	skb_reserve(skb, LL_RESERVED_SPACE(dev));
239
240	skb_reset_network_header(skb);
241
99eb8558 DES	242	mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
	243	if (ro->want_ack)
	244	mac_cb(skb)->flags \|= MAC_CB_FLAG_ACKREQ;
	245
9ec76716 SL	246	mac_cb(skb)->seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
	247	err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &ro->dst_addr,
	248	ro->bound ? &ro->src_addr : NULL, size);
	249	if (err < 0)
	250	goto out_skb;
	251
	252	skb_reset_mac_header(skb);
	253
	254	err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
	255	if (err < 0)
	256	goto out_skb;
	257
	258	if (size > mtu) {
e5241c44	259	pr_debug("size = %Zu, mtu = %u\n", size, mtu);
9ec76716 SL	260	err = -EINVAL;
	261	goto out_skb;
	262	}
	263
	264	skb->dev = dev;
	265	skb->sk = sk;
	266	skb->protocol = htons(ETH_P_IEEE802154);
	267
	268	dev_put(dev);
	269
	270	err = dev_queue_xmit(skb);
	271	if (err > 0)
	272	err = net_xmit_errno(err);
	273
	274	return err ?: size;
	275
	276	out_skb:
	277	kfree_skb(skb);
	278	out_dev:
	279	dev_put(dev);
	280	out:
	281	return err;
	282	}
	283
	284	static int dgram_recvmsg(struct kiocb iocb, struct sock sk,
	285	struct msghdr *msg, size_t len, int noblock, int flags,
	286	int *addr_len)
	287	{
	288	size_t copied = 0;
	289	int err = -EOPNOTSUPP;
	290	struct sk_buff *skb;
	291
	292	skb = skb_recv_datagram(sk, flags, noblock, &err);
	293	if (!skb)
	294	goto out;
	295
	296	copied = skb->len;
	297	if (len < copied) {
	298	msg->msg_flags \|= MSG_TRUNC;
	299	copied = len;
	300	}
	301
	302	/* FIXME: skip headers if necessary ?! */
	303	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	304	if (err)
	305	goto done;
	306
3b885787	307	sock_recv_ts_and_drops(msg, sk, skb);
9ec76716 SL	308
	309	if (flags & MSG_TRUNC)
	310	copied = skb->len;
	311	done:
	312	skb_free_datagram(sk, skb);
	313	out:
	314	if (err)
	315	return err;
	316	return copied;
	317	}
	318
	319	static int dgram_rcv_skb(struct sock sk, struct sk_buff skb)
	320	{
	321	if (sock_queue_rcv_skb(sk, skb) < 0) {
9ec76716 SL	322	kfree_skb(skb);
	323	return NET_RX_DROP;
	324	}
	325
	326	return NET_RX_SUCCESS;
	327	}
	328
	329	static inline int ieee802154_match_sock(u8 *hw_addr, u16 pan_id,
	330	u16 short_addr, struct dgram_sock *ro)
	331	{
	332	if (!ro->bound)
	333	return 1;
	334
	335	if (ro->src_addr.addr_type == IEEE802154_ADDR_LONG &&
	336	!memcmp(ro->src_addr.hwaddr, hw_addr, IEEE802154_ADDR_LEN))
	337	return 1;
	338
	339	if (ro->src_addr.addr_type == IEEE802154_ADDR_SHORT &&
	340	pan_id == ro->src_addr.pan_id &&
	341	short_addr == ro->src_addr.short_addr)
	342	return 1;
	343
	344	return 0;
	345	}
	346
	347	int ieee802154_dgram_deliver(struct net_device dev, struct sk_buff skb)
	348	{
	349	struct sock sk, prev = NULL;
	350	struct hlist_node *node;
	351	int ret = NET_RX_SUCCESS;
	352	u16 pan_id, short_addr;
	353
	354	/* Data frame processing */
	355	BUG_ON(dev->type != ARPHRD_IEEE802154);
	356
	357	pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
	358	short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
	359
	360	read_lock(&dgram_lock);
	361	sk_for_each(sk, node, &dgram_head) {
	362	if (ieee802154_match_sock(dev->dev_addr, pan_id, short_addr,
	363	dgram_sk(sk))) {
	364	if (prev) {
	365	struct sk_buff *clone;
	366	clone = skb_clone(skb, GFP_ATOMIC);
	367	if (clone)
	368	dgram_rcv_skb(prev, clone);
	369	}
	370
	371	prev = sk;
	372	}
	373	}
	374
	375	if (prev)
	376	dgram_rcv_skb(prev, skb);
	377	else {
	378	kfree_skb(skb);
	379	ret = NET_RX_DROP;
	380	}
	381	read_unlock(&dgram_lock);
	382
	383	return ret;
	384	}
	385
a9dfac33 DES	386	static int dgram_getsockopt(struct sock *sk, int level, int optname,
	387	char __user optval, int __user optlen)
	388	{
99eb8558 DES	389	struct dgram_sock *ro = dgram_sk(sk);
	390
	391	int val, len;
	392
	393	if (level != SOL_IEEE802154)
	394	return -EOPNOTSUPP;
	395
	396	if (get_user(len, optlen))
	397	return -EFAULT;
	398
	399	len = min_t(unsigned int, len, sizeof(int));
	400
	401	switch (optname) {
	402	case WPAN_WANTACK:
	403	val = ro->want_ack;
	404	break;
	405	default:
	406	return -ENOPROTOOPT;
	407	}
	408
	409	if (put_user(len, optlen))
	410	return -EFAULT;
	411	if (copy_to_user(optval, &val, len))
	412	return -EFAULT;
	413	return 0;
a9dfac33 DES	414	}
	415
	416	static int dgram_setsockopt(struct sock *sk, int level, int optname,
b7058842	417	char __user *optval, unsigned int optlen)
a9dfac33	418	{
99eb8558 DES	419	struct dgram_sock *ro = dgram_sk(sk);
	420	int val;
	421	int err = 0;
	422
	423	if (optlen < sizeof(int))
	424	return -EINVAL;
	425
	426	if (get_user(val, (int __user *)optval))
	427	return -EFAULT;
	428
	429	lock_sock(sk);
	430
	431	switch (optname) {
	432	case WPAN_WANTACK:
	433	ro->want_ack = !!val;
	434	break;
	435	default:
	436	err = -ENOPROTOOPT;
	437	break;
	438	}
	439
	440	release_sock(sk);
	441	return err;
a9dfac33 DES	442	}
a9dfac33 DES	443
9ec76716 SL	444	struct proto ieee802154_dgram_prot = {
	445	.name = "IEEE-802.15.4-MAC",
	446	.owner = THIS_MODULE,
	447	.obj_size = sizeof(struct dgram_sock),
	448	.init = dgram_init,
	449	.close = dgram_close,
	450	.bind = dgram_bind,
	451	.sendmsg = dgram_sendmsg,
	452	.recvmsg = dgram_recvmsg,
	453	.hash = dgram_hash,
	454	.unhash = dgram_unhash,
	455	.connect = dgram_connect,
	456	.disconnect = dgram_disconnect,
	457	.ioctl = dgram_ioctl,
a9dfac33 DES	458	.getsockopt = dgram_getsockopt,
a9dfac33 DES	459	.setsockopt = dgram_setsockopt,
9ec76716 SL	460	};
9ec76716 SL	461