[linux-block.git] / net / ieee802154 / af_ieee802154.c

/*
 * IEEE802154.4 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>
 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
 */

#include <linux/net.h>
#include <linux/capability.h>
#include <linux/module.h>
#include <linux/if_arp.h>
#include <linux/if.h>
#include <linux/termios.h>	/* For TIOCOUTQ/INQ */
#include <linux/list.h>
#include <net/datalink.h>
#include <net/psnap.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/route.h>

#include <net/af_ieee802154.h>
#include <net/ieee802154_netdev.h>

#include "af802154.h"

/*
 * Utility function for families
 */
struct net_device *ieee802154_get_dev(struct net *net,
		struct ieee802154_addr *addr)
{
	struct net_device *dev = NULL;
	struct net_device *tmp;
	u16 pan_id, short_addr;

	switch (addr->addr_type) {
	case IEEE802154_ADDR_LONG:
		rtnl_lock();
		dev = dev_getbyhwaddr(net, ARPHRD_IEEE802154, addr->hwaddr);
		if (dev)
			dev_hold(dev);
		rtnl_unlock();
		break;
	case IEEE802154_ADDR_SHORT:
		if (addr->pan_id == 0xffff ||
		    addr->short_addr == IEEE802154_ADDR_UNDEF ||
		    addr->short_addr == 0xffff)
			break;

		rtnl_lock();

		for_each_netdev(net, tmp) {
			if (tmp->type != ARPHRD_IEEE802154)
				continue;

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

			if (pan_id == addr->pan_id &&
			    short_addr == addr->short_addr) {
				dev = tmp;
				dev_hold(dev);
				break;
			}
		}

		rtnl_unlock();
		break;
	default:
		pr_warning("Unsupported ieee802154 address type: %d\n",
				addr->addr_type);
		break;
	}

	return dev;
}

static int ieee802154_sock_release(struct socket *sock)
{
	struct sock *sk = sock->sk;

	if (sk) {
		sock->sk = NULL;
		sk->sk_prot->close(sk, 0);
	}
	return 0;
}
static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
		struct msghdr *msg, size_t len)
{
	struct sock *sk = sock->sk;

	return sk->sk_prot->sendmsg(iocb, sk, msg, len);
}

static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr,
		int addr_len)
{
	struct sock *sk = sock->sk;

	if (sk->sk_prot->bind)
		return sk->sk_prot->bind(sk, uaddr, addr_len);

	return sock_no_bind(sock, uaddr, addr_len);
}

static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr,
			int addr_len, int flags)
{
	struct sock *sk = sock->sk;

	if (uaddr->sa_family == AF_UNSPEC)
		return sk->sk_prot->disconnect(sk, flags);

	return sk->sk_prot->connect(sk, uaddr, addr_len);
}

static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
		unsigned int cmd)
{
	struct ifreq ifr;
	int ret = -ENOIOCTLCMD;
	struct net_device *dev;

	if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
		return -EFAULT;

	ifr.ifr_name[IFNAMSIZ-1] = 0;

	dev_load(sock_net(sk), ifr.ifr_name);
	dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);

	if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
		ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);

	if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
		ret = -EFAULT;
	dev_put(dev);

	return ret;
}

static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
		unsigned long arg)
{
	struct sock *sk = sock->sk;

	switch (cmd) {
	case SIOCGSTAMP:
		return sock_get_timestamp(sk, (struct timeval __user *)arg);
	case SIOCGSTAMPNS:
		return sock_get_timestampns(sk, (struct timespec __user *)arg);
	case SIOCGIFADDR:
	case SIOCSIFADDR:
		return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
				cmd);
	default:
		if (!sk->sk_prot->ioctl)
			return -ENOIOCTLCMD;
		return sk->sk_prot->ioctl(sk, cmd, arg);
	}
}

static const struct proto_ops ieee802154_raw_ops = {
	.family		   = PF_IEEE802154,
	.owner		   = THIS_MODULE,
	.release	   = ieee802154_sock_release,
	.bind		   = ieee802154_sock_bind,
	.connect	   = ieee802154_sock_connect,
	.socketpair	   = sock_no_socketpair,
	.accept		   = sock_no_accept,
	.getname	   = sock_no_getname,
	.poll		   = datagram_poll,
	.ioctl		   = ieee802154_sock_ioctl,
	.listen		   = sock_no_listen,
	.shutdown	   = sock_no_shutdown,
	.setsockopt	   = sock_common_setsockopt,
	.getsockopt	   = sock_common_getsockopt,
	.sendmsg	   = ieee802154_sock_sendmsg,
	.recvmsg	   = sock_common_recvmsg,
	.mmap		   = sock_no_mmap,
	.sendpage	   = sock_no_sendpage,
#ifdef CONFIG_COMPAT
	.compat_setsockopt = compat_sock_common_setsockopt,
	.compat_getsockopt = compat_sock_common_getsockopt,
#endif
};

static const struct proto_ops ieee802154_dgram_ops = {
	.family		   = PF_IEEE802154,
	.owner		   = THIS_MODULE,
	.release	   = ieee802154_sock_release,
	.bind		   = ieee802154_sock_bind,
	.connect	   = ieee802154_sock_connect,
	.socketpair	   = sock_no_socketpair,
	.accept		   = sock_no_accept,
	.getname	   = sock_no_getname,
	.poll		   = datagram_poll,
	.ioctl		   = ieee802154_sock_ioctl,
	.listen		   = sock_no_listen,
	.shutdown	   = sock_no_shutdown,
	.setsockopt	   = sock_common_setsockopt,
	.getsockopt	   = sock_common_getsockopt,
	.sendmsg	   = ieee802154_sock_sendmsg,
	.recvmsg	   = sock_common_recvmsg,
	.mmap		   = sock_no_mmap,
	.sendpage	   = sock_no_sendpage,
#ifdef CONFIG_COMPAT
	.compat_setsockopt = compat_sock_common_setsockopt,
	.compat_getsockopt = compat_sock_common_getsockopt,
#endif
};


/*
 * Create a socket. Initialise the socket, blank the addresses
 * set the state.
 */
static int ieee802154_create(struct net *net, struct socket *sock,
		int protocol)
{
	struct sock *sk;
	int rc;
	struct proto *proto;
	const struct proto_ops *ops;

	if (net != &init_net)
		return -EAFNOSUPPORT;

	switch (sock->type) {
	case SOCK_RAW:
		proto = &ieee802154_raw_prot;
		ops = &ieee802154_raw_ops;
		break;
	case SOCK_DGRAM:
		proto = &ieee802154_dgram_prot;
		ops = &ieee802154_dgram_ops;
		break;
	default:
		rc = -ESOCKTNOSUPPORT;
		goto out;
	}

	rc = -ENOMEM;
	sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto);
	if (!sk)
		goto out;
	rc = 0;

	sock->ops = ops;

	sock_init_data(sock, sk);
	/* FIXME: sk->sk_destruct */
	sk->sk_family = PF_IEEE802154;

	/* Checksums on by default */
	sock_set_flag(sk, SOCK_ZAPPED);

	if (sk->sk_prot->hash)
		sk->sk_prot->hash(sk);

	if (sk->sk_prot->init) {
		rc = sk->sk_prot->init(sk);
		if (rc)
			sk_common_release(sk);
	}
out:
	return rc;
}

static struct net_proto_family ieee802154_family_ops = {
	.family		= PF_IEEE802154,
	.create		= ieee802154_create,
	.owner		= THIS_MODULE,
};

static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev,
	struct packet_type *pt, struct net_device *orig_dev)
{
	if (!netif_running(dev))
		return -ENODEV;
	pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
#ifdef DEBUG
	print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len);
#endif

	if (!net_eq(dev_net(dev), &init_net))
		goto drop;

	ieee802154_raw_deliver(dev, skb);

	if (dev->type != ARPHRD_IEEE802154)
		goto drop;

	if (skb->pkt_type != PACKET_OTHERHOST)
		return ieee802154_dgram_deliver(dev, skb);

drop:
	kfree_skb(skb);
	return NET_RX_DROP;
}


static struct packet_type ieee802154_packet_type = {
	.type = __constant_htons(ETH_P_IEEE802154),
	.func = ieee802154_rcv,
};

static int __init af_ieee802154_init(void)
{
	int rc = -EINVAL;

	rc = proto_register(&ieee802154_raw_prot, 1);
	if (rc)
		goto out;

	rc = proto_register(&ieee802154_dgram_prot, 1);
	if (rc)
		goto err_dgram;

	/* Tell SOCKET that we are alive */
	rc = sock_register(&ieee802154_family_ops);
	if (rc)
		goto err_sock;
	dev_add_pack(&ieee802154_packet_type);

	rc = 0;
	goto out;

err_sock:
	proto_unregister(&ieee802154_dgram_prot);
err_dgram:
	proto_unregister(&ieee802154_raw_prot);
out:
	return rc;
}
static void __exit af_ieee802154_remove(void)
{
	dev_remove_pack(&ieee802154_packet_type);
	sock_unregister(PF_IEEE802154);
	proto_unregister(&ieee802154_dgram_prot);
	proto_unregister(&ieee802154_raw_prot);
}

module_init(af_ieee802154_init);
module_exit(af_ieee802154_remove);

MODULE_LICENSE("GPL");
MODULE_ALIAS_NETPROTO(PF_IEEE802154);
Commit	Line	Data
9ec76716 SL	1	/*
	2	* IEEE802154.4 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	* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
	22	*/
	23
	24	#include <linux/net.h>
	25	#include <linux/capability.h>
	26	#include <linux/module.h>
	27	#include <linux/if_arp.h>
	28	#include <linux/if.h>
	29	#include <linux/termios.h> /* For TIOCOUTQ/INQ */
	30	#include <linux/list.h>
	31	#include <net/datalink.h>
	32	#include <net/psnap.h>
	33	#include <net/sock.h>
	34	#include <net/tcp_states.h>
	35	#include <net/route.h>
	36
f0166e5e DES	37	#include <net/af_ieee802154.h>
f0166e5e DES	38	#include <net/ieee802154_netdev.h>
9ec76716 SL	39
	40	#include "af802154.h"
	41
9ec76716 SL	42	/*
	43	* Utility function for families
	44	*/
	45	struct net_device ieee802154_get_dev(struct net net,
	46	struct ieee802154_addr *addr)
	47	{
	48	struct net_device *dev = NULL;
	49	struct net_device *tmp;
	50	u16 pan_id, short_addr;
	51
	52	switch (addr->addr_type) {
	53	case IEEE802154_ADDR_LONG:
	54	rtnl_lock();
	55	dev = dev_getbyhwaddr(net, ARPHRD_IEEE802154, addr->hwaddr);
	56	if (dev)
	57	dev_hold(dev);
	58	rtnl_unlock();
	59	break;
	60	case IEEE802154_ADDR_SHORT:
	61	if (addr->pan_id == 0xffff \|\|
	62	addr->short_addr == IEEE802154_ADDR_UNDEF \|\|
	63	addr->short_addr == 0xffff)
	64	break;
	65
	66	rtnl_lock();
	67
	68	for_each_netdev(net, tmp) {
	69	if (tmp->type != ARPHRD_IEEE802154)
	70	continue;
	71
	72	pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp);
	73	short_addr =
	74	ieee802154_mlme_ops(tmp)->get_short_addr(tmp);
	75
	76	if (pan_id == addr->pan_id &&
	77	short_addr == addr->short_addr) {
	78	dev = tmp;
	79	dev_hold(dev);
	80	break;
	81	}
	82	}
	83
	84	rtnl_unlock();
	85	break;
	86	default:
	87	pr_warning("Unsupported ieee802154 address type: %d\n",
	88	addr->addr_type);
	89	break;
	90	}
	91
	92	return dev;
	93	}
	94
	95	static int ieee802154_sock_release(struct socket *sock)
	96	{
	97	struct sock *sk = sock->sk;
	98
	99	if (sk) {
	100	sock->sk = NULL;
	101	sk->sk_prot->close(sk, 0);
	102	}
	103	return 0;
	104	}
	105	static int ieee802154_sock_sendmsg(struct kiocb iocb, struct socket sock,
106	struct msghdr *msg, size_t len)
107	{
108	struct sock *sk = sock->sk;
109
110	return sk->sk_prot->sendmsg(iocb, sk, msg, len);
111	}
112
113	static int ieee802154_sock_bind(struct socket sock, struct sockaddr uaddr,
114	int addr_len)
115	{
116	struct sock *sk = sock->sk;
117
118	if (sk->sk_prot->bind)
119	return sk->sk_prot->bind(sk, uaddr, addr_len);
120
121	return sock_no_bind(sock, uaddr, addr_len);
122	}
123
124	static int ieee802154_sock_connect(struct socket sock, struct sockaddr uaddr,
125	int addr_len, int flags)
126	{
127	struct sock *sk = sock->sk;
128
129	if (uaddr->sa_family == AF_UNSPEC)
130	return sk->sk_prot->disconnect(sk, flags);
131
132	return sk->sk_prot->connect(sk, uaddr, addr_len);
133	}
134
135	static int ieee802154_dev_ioctl(struct sock sk, struct ifreq __user arg,
136	unsigned int cmd)
137	{
138	struct ifreq ifr;
45a41d14	139	int ret = -ENOIOCTLCMD;
9ec76716 SL	140	struct net_device *dev;
	141
	142	if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
	143	return -EFAULT;
	144
	145	ifr.ifr_name[IFNAMSIZ-1] = 0;
	146
	147	dev_load(sock_net(sk), ifr.ifr_name);
	148	dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
45a41d14	149
929122cd	150	if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
9ec76716 SL	151	ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
	152
	153	if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
	154	ret = -EFAULT;
	155	dev_put(dev);
	156
	157	return ret;
	158	}
	159
	160	static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
	161	unsigned long arg)
	162	{
	163	struct sock *sk = sock->sk;
	164
	165	switch (cmd) {
	166	case SIOCGSTAMP:
	167	return sock_get_timestamp(sk, (struct timeval __user *)arg);
	168	case SIOCGSTAMPNS:
	169	return sock_get_timestampns(sk, (struct timespec __user *)arg);
	170	case SIOCGIFADDR:
	171	case SIOCSIFADDR:
	172	return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
	173	cmd);
	174	default:
	175	if (!sk->sk_prot->ioctl)
	176	return -ENOIOCTLCMD;
	177	return sk->sk_prot->ioctl(sk, cmd, arg);
	178	}
	179	}
	180
	181	static const struct proto_ops ieee802154_raw_ops = {
	182	.family = PF_IEEE802154,
	183	.owner = THIS_MODULE,
	184	.release = ieee802154_sock_release,
	185	.bind = ieee802154_sock_bind,
	186	.connect = ieee802154_sock_connect,
	187	.socketpair = sock_no_socketpair,
	188	.accept = sock_no_accept,
	189	.getname = sock_no_getname,
	190	.poll = datagram_poll,
	191	.ioctl = ieee802154_sock_ioctl,
	192	.listen = sock_no_listen,
	193	.shutdown = sock_no_shutdown,
	194	.setsockopt = sock_common_setsockopt,
	195	.getsockopt = sock_common_getsockopt,
	196	.sendmsg = ieee802154_sock_sendmsg,
	197	.recvmsg = sock_common_recvmsg,
	198	.mmap = sock_no_mmap,
	199	.sendpage = sock_no_sendpage,
	200	#ifdef CONFIG_COMPAT
	201	.compat_setsockopt = compat_sock_common_setsockopt,
	202	.compat_getsockopt = compat_sock_common_getsockopt,
	203	#endif
	204	};
	205
	206	static const struct proto_ops ieee802154_dgram_ops = {
	207	.family = PF_IEEE802154,
	208	.owner = THIS_MODULE,
	209	.release = ieee802154_sock_release,
	210	.bind = ieee802154_sock_bind,
	211	.connect = ieee802154_sock_connect,
	212	.socketpair = sock_no_socketpair,
	213	.accept = sock_no_accept,
	214	.getname = sock_no_getname,
215	.poll = datagram_poll,
216	.ioctl = ieee802154_sock_ioctl,
217	.listen = sock_no_listen,
218	.shutdown = sock_no_shutdown,
219	.setsockopt = sock_common_setsockopt,
220	.getsockopt = sock_common_getsockopt,
221	.sendmsg = ieee802154_sock_sendmsg,
222	.recvmsg = sock_common_recvmsg,
223	.mmap = sock_no_mmap,
224	.sendpage = sock_no_sendpage,
225	#ifdef CONFIG_COMPAT
226	.compat_setsockopt = compat_sock_common_setsockopt,
227	.compat_getsockopt = compat_sock_common_getsockopt,
228	#endif
229	};
230
231
232	/*
233	* Create a socket. Initialise the socket, blank the addresses
234	* set the state.
235	*/
236	static int ieee802154_create(struct net net, struct socket sock,
237	int protocol)
238	{
239	struct sock *sk;
240	int rc;
241	struct proto *proto;
242	const struct proto_ops *ops;
243
244	if (net != &init_net)
245	return -EAFNOSUPPORT;
246
247	switch (sock->type) {
248	case SOCK_RAW:
249	proto = &ieee802154_raw_prot;
250	ops = &ieee802154_raw_ops;
251	break;
252	case SOCK_DGRAM:
253	proto = &ieee802154_dgram_prot;
254	ops = &ieee802154_dgram_ops;
255	break;
256	default:
257	rc = -ESOCKTNOSUPPORT;
258	goto out;
259	}
260
261	rc = -ENOMEM;
262	sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto);
263	if (!sk)
264	goto out;
265	rc = 0;
266
267	sock->ops = ops;
268
269	sock_init_data(sock, sk);
270	/* FIXME: sk->sk_destruct */
271	sk->sk_family = PF_IEEE802154;
272
273	/* Checksums on by default */
274	sock_set_flag(sk, SOCK_ZAPPED);
275
276	if (sk->sk_prot->hash)
277	sk->sk_prot->hash(sk);
278
279	if (sk->sk_prot->init) {
280	rc = sk->sk_prot->init(sk);
281	if (rc)
282	sk_common_release(sk);
283	}
284	out:
285	return rc;
286	}
287
288	static struct net_proto_family ieee802154_family_ops = {
289	.family = PF_IEEE802154,
290	.create = ieee802154_create,
291	.owner = THIS_MODULE,
292	};
293
294	static int ieee802154_rcv(struct sk_buff skb, struct net_device dev,
295	struct packet_type pt, struct net_device orig_dev)
296	{
9ec76716 SL	297	if (!netif_running(dev))
	298	return -ENODEV;
	299	pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
25502bda DB	300	#ifdef DEBUG
	301	print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len);
	302	#endif
9ec76716 SL	303
	304	if (!net_eq(dev_net(dev), &init_net))
	305	goto drop;
	306
	307	ieee802154_raw_deliver(dev, skb);
	308
	309	if (dev->type != ARPHRD_IEEE802154)
	310	goto drop;
	311
	312	if (skb->pkt_type != PACKET_OTHERHOST)
	313	return ieee802154_dgram_deliver(dev, skb);
	314
	315	drop:
	316	kfree_skb(skb);
	317	return NET_RX_DROP;
	318	}
	319
	320
	321	static struct packet_type ieee802154_packet_type = {
	322	.type = __constant_htons(ETH_P_IEEE802154),
	323	.func = ieee802154_rcv,
	324	};
	325
	326	static int __init af_ieee802154_init(void)
	327	{
	328	int rc = -EINVAL;
	329
	330	rc = proto_register(&ieee802154_raw_prot, 1);
	331	if (rc)
	332	goto out;
	333
	334	rc = proto_register(&ieee802154_dgram_prot, 1);
	335	if (rc)
	336	goto err_dgram;
	337
	338	/* Tell SOCKET that we are alive */
	339	rc = sock_register(&ieee802154_family_ops);
	340	if (rc)
	341	goto err_sock;
	342	dev_add_pack(&ieee802154_packet_type);
	343
	344	rc = 0;
	345	goto out;
	346
	347	err_sock:
	348	proto_unregister(&ieee802154_dgram_prot);
	349	err_dgram:
	350	proto_unregister(&ieee802154_raw_prot);
	351	out:
	352	return rc;
	353	}
	354	static void __exit af_ieee802154_remove(void)
	355	{
	356	dev_remove_pack(&ieee802154_packet_type);
	357	sock_unregister(PF_IEEE802154);
	358	proto_unregister(&ieee802154_dgram_prot);
	359	proto_unregister(&ieee802154_raw_prot);
	360	}
	361
	362	module_init(af_ieee802154_init);
	363	module_exit(af_ieee802154_remove);
	364
	365	MODULE_LICENSE("GPL");
	366	MODULE_ALIAS_NETPROTO(PF_IEEE802154);