[net-next-2.6.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/ieee802154/af_ieee802154.h>
#include <net/ieee802154/netdevice.h>

#include "af802154.h"

#define DBG_DUMP(data, len) { \
	int i; \
	pr_debug("function: %s: data: len %d:\n", __func__, len); \
	for (i = 0; i < len; i++) {\
		pr_debug("%02x: %02x\n", i, (data)[i]); \
	} \
}

/*
 * 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 = -EINVAL;
	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->type == ARPHRD_IEEE802154_PHY)
		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)
{
	DBG_DUMP(skb->data, skb->len);
	if (!netif_running(dev))
		return -ENODEV;
	pr_debug("got frame, type %d, dev %p\n", dev->type, dev);

	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
	37	#include <net/ieee802154/af_ieee802154.h>
	38	#include <net/ieee802154/netdevice.h>
	39
	40	#include "af802154.h"
	41
	42	#define DBG_DUMP(data, len) { \
	43	int i; \
	44	pr_debug("function: %s: data: len %d:\n", __func__, len); \
	45	for (i = 0; i < len; i++) {\
	46	pr_debug("%02x: %02x\n", i, (data)[i]); \
	47	} \
	48	}
	49
	50	/*
	51	* Utility function for families
	52	*/
	53	struct net_device ieee802154_get_dev(struct net net,
	54	struct ieee802154_addr *addr)
	55	{
	56	struct net_device *dev = NULL;
	57	struct net_device *tmp;
	58	u16 pan_id, short_addr;
	59
	60	switch (addr->addr_type) {
	61	case IEEE802154_ADDR_LONG:
	62	rtnl_lock();
	63	dev = dev_getbyhwaddr(net, ARPHRD_IEEE802154, addr->hwaddr);
	64	if (dev)
65	dev_hold(dev);
66	rtnl_unlock();
67	break;
68	case IEEE802154_ADDR_SHORT:
69	if (addr->pan_id == 0xffff \|\|
70	addr->short_addr == IEEE802154_ADDR_UNDEF \|\|
71	addr->short_addr == 0xffff)
72	break;
73
74	rtnl_lock();
75
76	for_each_netdev(net, tmp) {
77	if (tmp->type != ARPHRD_IEEE802154)
78	continue;
79
80	pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp);
81	short_addr =
82	ieee802154_mlme_ops(tmp)->get_short_addr(tmp);
83
84	if (pan_id == addr->pan_id &&
85	short_addr == addr->short_addr) {
86	dev = tmp;
87	dev_hold(dev);
88	break;
89	}
90	}
91
92	rtnl_unlock();
93	break;
94	default:
95	pr_warning("Unsupported ieee802154 address type: %d\n",
96	addr->addr_type);
97	break;
98	}
99
100	return dev;
101	}
102
103	static int ieee802154_sock_release(struct socket *sock)
104	{
105	struct sock *sk = sock->sk;
106
107	if (sk) {
108	sock->sk = NULL;
109	sk->sk_prot->close(sk, 0);
110	}
111	return 0;
112	}
113	static int ieee802154_sock_sendmsg(struct kiocb iocb, struct socket sock,
114	struct msghdr *msg, size_t len)
115	{
116	struct sock *sk = sock->sk;
117
118	return sk->sk_prot->sendmsg(iocb, sk, msg, len);
119	}
120
121	static int ieee802154_sock_bind(struct socket sock, struct sockaddr uaddr,
122	int addr_len)
123	{
124	struct sock *sk = sock->sk;
125
126	if (sk->sk_prot->bind)
127	return sk->sk_prot->bind(sk, uaddr, addr_len);
128
129	return sock_no_bind(sock, uaddr, addr_len);
130	}
131
132	static int ieee802154_sock_connect(struct socket sock, struct sockaddr uaddr,
133	int addr_len, int flags)
134	{
135	struct sock *sk = sock->sk;
136
137	if (uaddr->sa_family == AF_UNSPEC)
138	return sk->sk_prot->disconnect(sk, flags);
139
140	return sk->sk_prot->connect(sk, uaddr, addr_len);
141	}
142
143	static int ieee802154_dev_ioctl(struct sock sk, struct ifreq __user arg,
144	unsigned int cmd)
145	{
146	struct ifreq ifr;
147	int ret = -EINVAL;
148	struct net_device *dev;
149
150	if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
151	return -EFAULT;
152
153	ifr.ifr_name[IFNAMSIZ-1] = 0;
154
155	dev_load(sock_net(sk), ifr.ifr_name);
156	dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
157	if (dev->type == ARPHRD_IEEE802154 \|\|
158	dev->type == ARPHRD_IEEE802154_PHY)
159	ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
160
161	if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
162	ret = -EFAULT;
163	dev_put(dev);
164
165	return ret;
166	}
167
168	static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
169	unsigned long arg)
170	{
171	struct sock *sk = sock->sk;
172
173	switch (cmd) {
174	case SIOCGSTAMP:
175	return sock_get_timestamp(sk, (struct timeval __user *)arg);
176	case SIOCGSTAMPNS:
177	return sock_get_timestampns(sk, (struct timespec __user *)arg);
178	case SIOCGIFADDR:
179	case SIOCSIFADDR:
180	return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
181	cmd);
182	default:
183	if (!sk->sk_prot->ioctl)
184	return -ENOIOCTLCMD;
185	return sk->sk_prot->ioctl(sk, cmd, arg);
186	}
187	}
188
189	static const struct proto_ops ieee802154_raw_ops = {
190	.family = PF_IEEE802154,
191	.owner = THIS_MODULE,
192	.release = ieee802154_sock_release,
193	.bind = ieee802154_sock_bind,
194	.connect = ieee802154_sock_connect,
195	.socketpair = sock_no_socketpair,
196	.accept = sock_no_accept,
197	.getname = sock_no_getname,
198	.poll = datagram_poll,
199	.ioctl = ieee802154_sock_ioctl,
200	.listen = sock_no_listen,
201	.shutdown = sock_no_shutdown,
202	.setsockopt = sock_common_setsockopt,
203	.getsockopt = sock_common_getsockopt,
204	.sendmsg = ieee802154_sock_sendmsg,
205	.recvmsg = sock_common_recvmsg,
206	.mmap = sock_no_mmap,
207	.sendpage = sock_no_sendpage,
208	#ifdef CONFIG_COMPAT
209	.compat_setsockopt = compat_sock_common_setsockopt,
210	.compat_getsockopt = compat_sock_common_getsockopt,
211	#endif
212	};
213
214	static const struct proto_ops ieee802154_dgram_ops = {
215	.family = PF_IEEE802154,
216	.owner = THIS_MODULE,
217	.release = ieee802154_sock_release,
218	.bind = ieee802154_sock_bind,
219	.connect = ieee802154_sock_connect,
220	.socketpair = sock_no_socketpair,
221	.accept = sock_no_accept,
222	.getname = sock_no_getname,
223	.poll = datagram_poll,
224	.ioctl = ieee802154_sock_ioctl,
225	.listen = sock_no_listen,
226	.shutdown = sock_no_shutdown,
227	.setsockopt = sock_common_setsockopt,
228	.getsockopt = sock_common_getsockopt,
229	.sendmsg = ieee802154_sock_sendmsg,
230	.recvmsg = sock_common_recvmsg,
231	.mmap = sock_no_mmap,
232	.sendpage = sock_no_sendpage,
233	#ifdef CONFIG_COMPAT
234	.compat_setsockopt = compat_sock_common_setsockopt,
235	.compat_getsockopt = compat_sock_common_getsockopt,
236	#endif
237	};
238
239
240	/*
241	* Create a socket. Initialise the socket, blank the addresses
242	* set the state.
243	*/
244	static int ieee802154_create(struct net net, struct socket sock,
245	int protocol)
246	{
247	struct sock *sk;
248	int rc;
249	struct proto *proto;
250	const struct proto_ops *ops;
251
252	if (net != &init_net)
253	return -EAFNOSUPPORT;
254
255	switch (sock->type) {
256	case SOCK_RAW:
257	proto = &ieee802154_raw_prot;
258	ops = &ieee802154_raw_ops;
259	break;
260	case SOCK_DGRAM:
261	proto = &ieee802154_dgram_prot;
262	ops = &ieee802154_dgram_ops;
263	break;
264	default:
265	rc = -ESOCKTNOSUPPORT;
266	goto out;
267	}
268
269	rc = -ENOMEM;
270	sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto);
271	if (!sk)
272	goto out;
273	rc = 0;
274
275	sock->ops = ops;
276
277	sock_init_data(sock, sk);
278	/* FIXME: sk->sk_destruct */
279	sk->sk_family = PF_IEEE802154;
280
281	/* Checksums on by default */
282	sock_set_flag(sk, SOCK_ZAPPED);
283
284	if (sk->sk_prot->hash)
285	sk->sk_prot->hash(sk);
286
287	if (sk->sk_prot->init) {
288	rc = sk->sk_prot->init(sk);
289	if (rc)
290	sk_common_release(sk);
291	}
292	out:
293	return rc;
294	}
295
296	static struct net_proto_family ieee802154_family_ops = {
297	.family = PF_IEEE802154,
298	.create = ieee802154_create,
299	.owner = THIS_MODULE,
300	};
301
302	static int ieee802154_rcv(struct sk_buff skb, struct net_device dev,
303	struct packet_type pt, struct net_device orig_dev)
304	{
305	DBG_DUMP(skb->data, skb->len);
306	if (!netif_running(dev))
307	return -ENODEV;
308	pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
309
310	if (!net_eq(dev_net(dev), &init_net))
311	goto drop;
312
313	ieee802154_raw_deliver(dev, skb);
314
315	if (dev->type != ARPHRD_IEEE802154)
316	goto drop;
317
318	if (skb->pkt_type != PACKET_OTHERHOST)
319	return ieee802154_dgram_deliver(dev, skb);
320
321	drop:
322	kfree_skb(skb);
323	return NET_RX_DROP;
324	}
325
326
327	static struct packet_type ieee802154_packet_type = {
328	.type = __constant_htons(ETH_P_IEEE802154),
329	.func = ieee802154_rcv,
330	};
331
332	static int __init af_ieee802154_init(void)
333	{
334	int rc = -EINVAL;
335
336	rc = proto_register(&ieee802154_raw_prot, 1);
337	if (rc)
338	goto out;
339
340	rc = proto_register(&ieee802154_dgram_prot, 1);
341	if (rc)
342	goto err_dgram;
343
344	/* Tell SOCKET that we are alive */
345	rc = sock_register(&ieee802154_family_ops);
346	if (rc)
347	goto err_sock;
348	dev_add_pack(&ieee802154_packet_type);
349
350	rc = 0;
351	goto out;
352
353	err_sock:
354	proto_unregister(&ieee802154_dgram_prot);
355	err_dgram:
356	proto_unregister(&ieee802154_raw_prot);
357	out:
358	return rc;
359	}
360	static void __exit af_ieee802154_remove(void)
361	{
362	dev_remove_pack(&ieee802154_packet_type);
363	sock_unregister(PF_IEEE802154);
364	proto_unregister(&ieee802154_dgram_prot);
365	proto_unregister(&ieee802154_raw_prot);
366	}
367
368	module_init(af_ieee802154_init);
369	module_exit(af_ieee802154_remove);
370
371	MODULE_LICENSE("GPL");
372	MODULE_ALIAS_NETPROTO(PF_IEEE802154);