[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / ieee802154 / dgram.c

/*
 * IEEE 802.15.4 dgram 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 int bound:1;
	unsigned int 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 int mtu;
	struct sk_buff *skb;
	struct dgram_sock *ro = dgram_sk(sk);
	int hlen, tlen;
	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);

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

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

	skb_reserve(skb, hlen);

	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;

	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;
	struct sockaddr_ieee802154 *saddr;

	saddr = (struct sockaddr_ieee802154 *)msg->msg_name;

	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 (saddr) {
		saddr->family = AF_IEEE802154;
		saddr->addr = mac_cb(skb)->sa;
		*addr_len = sizeof(*saddr);
	}

	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;
	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, &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	1	/*
5fd72607	2	* IEEE 802.15.4 dgram socket interface
9ec76716 SL	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	46
95c96174 ED	47	unsigned int bound:1;
95c96174 ED	48	unsigned int 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;
95c96174	209	unsigned int mtu;
9ec76716 SL	210	struct sk_buff *skb;
9ec76716 SL	211	struct dgram_sock *ro = dgram_sk(sk);
ae641949	212	int hlen, tlen;
9ec76716 SL	213	int err;
	214
	215	if (msg->msg_flags & MSG_OOB) {
	216	pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags);
	217	return -EOPNOTSUPP;
	218	}
	219
	220	if (!ro->bound)
	221	dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);
	222	else
	223	dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr);
	224
	225	if (!dev) {
	226	pr_debug("no dev\n");
	227	err = -ENXIO;
	228	goto out;
	229	}
	230	mtu = dev->mtu;
	231	pr_debug("name = %s, mtu = %u\n", dev->name, mtu);
	232
3da947b2 SL	233	if (size > mtu) {
	234	pr_debug("size = %Zu, mtu = %u\n", size, mtu);
	235	err = -EINVAL;
	236	goto out_dev;
	237	}
	238
ae641949 HX	239	hlen = LL_RESERVED_SPACE(dev);
	240	tlen = dev->needed_tailroom;
	241	skb = sock_alloc_send_skb(sk, hlen + tlen + size,
9ec76716 SL	242	msg->msg_flags & MSG_DONTWAIT,
	243	&err);
	244	if (!skb)
	245	goto out_dev;
	246
ae641949	247	skb_reserve(skb, hlen);
9ec76716 SL	248
	249	skb_reset_network_header(skb);
	250
99eb8558 DES	251	mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
	252	if (ro->want_ack)
	253	mac_cb(skb)->flags \|= MAC_CB_FLAG_ACKREQ;
	254
9ec76716 SL	255	mac_cb(skb)->seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
	256	err = dev_hard_header(skb, dev, ETH_P_IEEE802154, &ro->dst_addr,
	257	ro->bound ? &ro->src_addr : NULL, size);
	258	if (err < 0)
	259	goto out_skb;
	260
	261	skb_reset_mac_header(skb);
	262
	263	err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size);
	264	if (err < 0)
	265	goto out_skb;
	266
9ec76716 SL	267	skb->dev = dev;
	268	skb->sk = sk;
	269	skb->protocol = htons(ETH_P_IEEE802154);
	270
	271	dev_put(dev);
	272
	273	err = dev_queue_xmit(skb);
	274	if (err > 0)
	275	err = net_xmit_errno(err);
	276
	277	return err ?: size;
	278
	279	out_skb:
	280	kfree_skb(skb);
	281	out_dev:
	282	dev_put(dev);
	283	out:
	284	return err;
	285	}
	286
	287	static int dgram_recvmsg(struct kiocb iocb, struct sock sk,
	288	struct msghdr *msg, size_t len, int noblock, int flags,
	289	int *addr_len)
	290	{
	291	size_t copied = 0;
	292	int err = -EOPNOTSUPP;
	293	struct sk_buff *skb;
6364e6ee SR	294	struct sockaddr_ieee802154 *saddr;
	295
	296	saddr = (struct sockaddr_ieee802154 *)msg->msg_name;
9ec76716 SL	297
	298	skb = skb_recv_datagram(sk, flags, noblock, &err);
	299	if (!skb)
	300	goto out;
	301
	302	copied = skb->len;
	303	if (len < copied) {
	304	msg->msg_flags \|= MSG_TRUNC;
	305	copied = len;
	306	}
	307
	308	/* FIXME: skip headers if necessary ?! */
	309	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
	310	if (err)
	311	goto done;
	312
3b885787	313	sock_recv_ts_and_drops(msg, sk, skb);
9ec76716	314
6364e6ee SR	315	if (saddr) {
	316	saddr->family = AF_IEEE802154;
	317	saddr->addr = mac_cb(skb)->sa;
6364e6ee	318	addr_len = sizeof(saddr);
a2214488	319	}
6364e6ee	320
9ec76716 SL	321	if (flags & MSG_TRUNC)
	322	copied = skb->len;
	323	done:
	324	skb_free_datagram(sk, skb);
	325	out:
	326	if (err)
	327	return err;
	328	return copied;
	329	}
	330
	331	static int dgram_rcv_skb(struct sock sk, struct sk_buff skb)
	332	{
	333	if (sock_queue_rcv_skb(sk, skb) < 0) {
9ec76716 SL	334	kfree_skb(skb);
	335	return NET_RX_DROP;
	336	}
	337
	338	return NET_RX_SUCCESS;
	339	}
	340
	341	static inline int ieee802154_match_sock(u8 *hw_addr, u16 pan_id,
	342	u16 short_addr, struct dgram_sock *ro)
	343	{
	344	if (!ro->bound)
	345	return 1;
	346
	347	if (ro->src_addr.addr_type == IEEE802154_ADDR_LONG &&
	348	!memcmp(ro->src_addr.hwaddr, hw_addr, IEEE802154_ADDR_LEN))
	349	return 1;
	350
	351	if (ro->src_addr.addr_type == IEEE802154_ADDR_SHORT &&
	352	pan_id == ro->src_addr.pan_id &&
	353	short_addr == ro->src_addr.short_addr)
	354	return 1;
	355
	356	return 0;
	357	}
	358
	359	int ieee802154_dgram_deliver(struct net_device dev, struct sk_buff skb)
	360	{
	361	struct sock sk, prev = NULL;
9ec76716 SL	362	int ret = NET_RX_SUCCESS;
	363	u16 pan_id, short_addr;
	364
	365	/* Data frame processing */
	366	BUG_ON(dev->type != ARPHRD_IEEE802154);
	367
	368	pan_id = ieee802154_mlme_ops(dev)->get_pan_id(dev);
	369	short_addr = ieee802154_mlme_ops(dev)->get_short_addr(dev);
	370
	371	read_lock(&dgram_lock);
b67bfe0d	372	sk_for_each(sk, &dgram_head) {
9ec76716 SL	373	if (ieee802154_match_sock(dev->dev_addr, pan_id, short_addr,
	374	dgram_sk(sk))) {
	375	if (prev) {
	376	struct sk_buff *clone;
	377	clone = skb_clone(skb, GFP_ATOMIC);
	378	if (clone)
	379	dgram_rcv_skb(prev, clone);
	380	}
	381
	382	prev = sk;
	383	}
	384	}
	385
	386	if (prev)
	387	dgram_rcv_skb(prev, skb);
	388	else {
	389	kfree_skb(skb);
	390	ret = NET_RX_DROP;
	391	}
	392	read_unlock(&dgram_lock);
	393
	394	return ret;
	395	}
	396
a9dfac33 DES	397	static int dgram_getsockopt(struct sock *sk, int level, int optname,
	398	char __user optval, int __user optlen)
	399	{
99eb8558 DES	400	struct dgram_sock *ro = dgram_sk(sk);
	401
	402	int val, len;
	403
	404	if (level != SOL_IEEE802154)
	405	return -EOPNOTSUPP;
	406
	407	if (get_user(len, optlen))
	408	return -EFAULT;
	409
	410	len = min_t(unsigned int, len, sizeof(int));
	411
	412	switch (optname) {
	413	case WPAN_WANTACK:
	414	val = ro->want_ack;
	415	break;
	416	default:
	417	return -ENOPROTOOPT;
	418	}
	419
	420	if (put_user(len, optlen))
	421	return -EFAULT;
	422	if (copy_to_user(optval, &val, len))
	423	return -EFAULT;
	424	return 0;
a9dfac33 DES	425	}
	426
	427	static int dgram_setsockopt(struct sock *sk, int level, int optname,
b7058842	428	char __user *optval, unsigned int optlen)
a9dfac33	429	{
99eb8558 DES	430	struct dgram_sock *ro = dgram_sk(sk);
	431	int val;
	432	int err = 0;
	433
	434	if (optlen < sizeof(int))
	435	return -EINVAL;
	436
	437	if (get_user(val, (int __user *)optval))
	438	return -EFAULT;
	439
	440	lock_sock(sk);
	441
	442	switch (optname) {
	443	case WPAN_WANTACK:
	444	ro->want_ack = !!val;
	445	break;
	446	default:
	447	err = -ENOPROTOOPT;
	448	break;
	449	}
	450
	451	release_sock(sk);
	452	return err;
a9dfac33 DES	453	}
a9dfac33 DES	454
9ec76716 SL	455	struct proto ieee802154_dgram_prot = {
	456	.name = "IEEE-802.15.4-MAC",
	457	.owner = THIS_MODULE,
	458	.obj_size = sizeof(struct dgram_sock),
	459	.init = dgram_init,
	460	.close = dgram_close,
	461	.bind = dgram_bind,
	462	.sendmsg = dgram_sendmsg,
	463	.recvmsg = dgram_recvmsg,
	464	.hash = dgram_hash,
	465	.unhash = dgram_unhash,
	466	.connect = dgram_connect,
	467	.disconnect = dgram_disconnect,
	468	.ioctl = dgram_ioctl,
a9dfac33 DES	469	.getsockopt = dgram_getsockopt,
a9dfac33 DES	470	.setsockopt = dgram_setsockopt,
9ec76716 SL	471	};
9ec76716 SL	472