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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[net-next-2.6.git] / net / ieee802154 / af_ieee802154.c
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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>
5a0e3ad6 31#include <linux/slab.h>
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32#include <net/datalink.h>
33#include <net/psnap.h>
34#include <net/sock.h>
35#include <net/tcp_states.h>
36#include <net/route.h>
37
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38#include <net/af_ieee802154.h>
39#include <net/ieee802154_netdev.h>
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40
41#include "af802154.h"
42
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43/*
44 * Utility function for families
45 */
46struct net_device *ieee802154_get_dev(struct net *net,
47 struct ieee802154_addr *addr)
48{
49 struct net_device *dev = NULL;
50 struct net_device *tmp;
51 u16 pan_id, short_addr;
52
53 switch (addr->addr_type) {
54 case IEEE802154_ADDR_LONG:
55 rtnl_lock();
56 dev = dev_getbyhwaddr(net, ARPHRD_IEEE802154, addr->hwaddr);
57 if (dev)
58 dev_hold(dev);
59 rtnl_unlock();
60 break;
61 case IEEE802154_ADDR_SHORT:
62 if (addr->pan_id == 0xffff ||
63 addr->short_addr == IEEE802154_ADDR_UNDEF ||
64 addr->short_addr == 0xffff)
65 break;
66
67 rtnl_lock();
68
69 for_each_netdev(net, tmp) {
70 if (tmp->type != ARPHRD_IEEE802154)
71 continue;
72
73 pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp);
74 short_addr =
75 ieee802154_mlme_ops(tmp)->get_short_addr(tmp);
76
77 if (pan_id == addr->pan_id &&
78 short_addr == addr->short_addr) {
79 dev = tmp;
80 dev_hold(dev);
81 break;
82 }
83 }
84
85 rtnl_unlock();
86 break;
87 default:
88 pr_warning("Unsupported ieee802154 address type: %d\n",
89 addr->addr_type);
90 break;
91 }
92
93 return dev;
94}
95
96static int ieee802154_sock_release(struct socket *sock)
97{
98 struct sock *sk = sock->sk;
99
100 if (sk) {
101 sock->sk = NULL;
102 sk->sk_prot->close(sk, 0);
103 }
104 return 0;
105}
106static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
107 struct msghdr *msg, size_t len)
108{
109 struct sock *sk = sock->sk;
110
111 return sk->sk_prot->sendmsg(iocb, sk, msg, len);
112}
113
114static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr,
115 int addr_len)
116{
117 struct sock *sk = sock->sk;
118
119 if (sk->sk_prot->bind)
120 return sk->sk_prot->bind(sk, uaddr, addr_len);
121
122 return sock_no_bind(sock, uaddr, addr_len);
123}
124
125static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr,
126 int addr_len, int flags)
127{
128 struct sock *sk = sock->sk;
129
130 if (uaddr->sa_family == AF_UNSPEC)
131 return sk->sk_prot->disconnect(sk, flags);
132
133 return sk->sk_prot->connect(sk, uaddr, addr_len);
134}
135
136static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg,
137 unsigned int cmd)
138{
139 struct ifreq ifr;
45a41d14 140 int ret = -ENOIOCTLCMD;
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141 struct net_device *dev;
142
143 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
144 return -EFAULT;
145
146 ifr.ifr_name[IFNAMSIZ-1] = 0;
147
148 dev_load(sock_net(sk), ifr.ifr_name);
149 dev = dev_get_by_name(sock_net(sk), ifr.ifr_name);
45a41d14 150
929122cd 151 if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl)
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152 ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd);
153
154 if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq)))
155 ret = -EFAULT;
156 dev_put(dev);
157
158 return ret;
159}
160
161static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd,
162 unsigned long arg)
163{
164 struct sock *sk = sock->sk;
165
166 switch (cmd) {
167 case SIOCGSTAMP:
168 return sock_get_timestamp(sk, (struct timeval __user *)arg);
169 case SIOCGSTAMPNS:
170 return sock_get_timestampns(sk, (struct timespec __user *)arg);
171 case SIOCGIFADDR:
172 case SIOCSIFADDR:
173 return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg,
174 cmd);
175 default:
176 if (!sk->sk_prot->ioctl)
177 return -ENOIOCTLCMD;
178 return sk->sk_prot->ioctl(sk, cmd, arg);
179 }
180}
181
182static const struct proto_ops ieee802154_raw_ops = {
183 .family = PF_IEEE802154,
184 .owner = THIS_MODULE,
185 .release = ieee802154_sock_release,
186 .bind = ieee802154_sock_bind,
187 .connect = ieee802154_sock_connect,
188 .socketpair = sock_no_socketpair,
189 .accept = sock_no_accept,
190 .getname = sock_no_getname,
191 .poll = datagram_poll,
192 .ioctl = ieee802154_sock_ioctl,
193 .listen = sock_no_listen,
194 .shutdown = sock_no_shutdown,
195 .setsockopt = sock_common_setsockopt,
196 .getsockopt = sock_common_getsockopt,
197 .sendmsg = ieee802154_sock_sendmsg,
198 .recvmsg = sock_common_recvmsg,
199 .mmap = sock_no_mmap,
200 .sendpage = sock_no_sendpage,
201#ifdef CONFIG_COMPAT
202 .compat_setsockopt = compat_sock_common_setsockopt,
203 .compat_getsockopt = compat_sock_common_getsockopt,
204#endif
205};
206
207static const struct proto_ops ieee802154_dgram_ops = {
208 .family = PF_IEEE802154,
209 .owner = THIS_MODULE,
210 .release = ieee802154_sock_release,
211 .bind = ieee802154_sock_bind,
212 .connect = ieee802154_sock_connect,
213 .socketpair = sock_no_socketpair,
214 .accept = sock_no_accept,
215 .getname = sock_no_getname,
216 .poll = datagram_poll,
217 .ioctl = ieee802154_sock_ioctl,
218 .listen = sock_no_listen,
219 .shutdown = sock_no_shutdown,
220 .setsockopt = sock_common_setsockopt,
221 .getsockopt = sock_common_getsockopt,
222 .sendmsg = ieee802154_sock_sendmsg,
223 .recvmsg = sock_common_recvmsg,
224 .mmap = sock_no_mmap,
225 .sendpage = sock_no_sendpage,
226#ifdef CONFIG_COMPAT
227 .compat_setsockopt = compat_sock_common_setsockopt,
228 .compat_getsockopt = compat_sock_common_getsockopt,
229#endif
230};
231
232
233/*
234 * Create a socket. Initialise the socket, blank the addresses
235 * set the state.
236 */
237static int ieee802154_create(struct net *net, struct socket *sock,
3f378b68 238 int protocol, int kern)
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239{
240 struct sock *sk;
241 int rc;
242 struct proto *proto;
243 const struct proto_ops *ops;
244
09ad9bc7 245 if (!net_eq(net, &init_net))
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246 return -EAFNOSUPPORT;
247
248 switch (sock->type) {
249 case SOCK_RAW:
250 proto = &ieee802154_raw_prot;
251 ops = &ieee802154_raw_ops;
252 break;
253 case SOCK_DGRAM:
254 proto = &ieee802154_dgram_prot;
255 ops = &ieee802154_dgram_ops;
256 break;
257 default:
258 rc = -ESOCKTNOSUPPORT;
259 goto out;
260 }
261
262 rc = -ENOMEM;
263 sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto);
264 if (!sk)
265 goto out;
266 rc = 0;
267
268 sock->ops = ops;
269
270 sock_init_data(sock, sk);
271 /* FIXME: sk->sk_destruct */
272 sk->sk_family = PF_IEEE802154;
273
274 /* Checksums on by default */
275 sock_set_flag(sk, SOCK_ZAPPED);
276
277 if (sk->sk_prot->hash)
278 sk->sk_prot->hash(sk);
279
280 if (sk->sk_prot->init) {
281 rc = sk->sk_prot->init(sk);
282 if (rc)
283 sk_common_release(sk);
284 }
285out:
286 return rc;
287}
288
ec1b4cf7 289static const struct net_proto_family ieee802154_family_ops = {
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290 .family = PF_IEEE802154,
291 .create = ieee802154_create,
292 .owner = THIS_MODULE,
293};
294
295static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev,
296 struct packet_type *pt, struct net_device *orig_dev)
297{
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298 if (!netif_running(dev))
299 return -ENODEV;
300 pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
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301#ifdef DEBUG
302 print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len);
303#endif
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304
305 if (!net_eq(dev_net(dev), &init_net))
306 goto drop;
307
308 ieee802154_raw_deliver(dev, skb);
309
310 if (dev->type != ARPHRD_IEEE802154)
311 goto drop;
312
313 if (skb->pkt_type != PACKET_OTHERHOST)
314 return ieee802154_dgram_deliver(dev, skb);
315
316drop:
317 kfree_skb(skb);
318 return NET_RX_DROP;
319}
320
321
322static struct packet_type ieee802154_packet_type = {
323 .type = __constant_htons(ETH_P_IEEE802154),
324 .func = ieee802154_rcv,
325};
326
327static int __init af_ieee802154_init(void)
328{
329 int rc = -EINVAL;
330
331 rc = proto_register(&ieee802154_raw_prot, 1);
332 if (rc)
333 goto out;
334
335 rc = proto_register(&ieee802154_dgram_prot, 1);
336 if (rc)
337 goto err_dgram;
338
339 /* Tell SOCKET that we are alive */
340 rc = sock_register(&ieee802154_family_ops);
341 if (rc)
342 goto err_sock;
343 dev_add_pack(&ieee802154_packet_type);
344
345 rc = 0;
346 goto out;
347
348err_sock:
349 proto_unregister(&ieee802154_dgram_prot);
350err_dgram:
351 proto_unregister(&ieee802154_raw_prot);
352out:
353 return rc;
354}
355static void __exit af_ieee802154_remove(void)
356{
357 dev_remove_pack(&ieee802154_packet_type);
358 sock_unregister(PF_IEEE802154);
359 proto_unregister(&ieee802154_dgram_prot);
360 proto_unregister(&ieee802154_raw_prot);
361}
362
363module_init(af_ieee802154_init);
364module_exit(af_ieee802154_remove);
365
366MODULE_LICENSE("GPL");
367MODULE_ALIAS_NETPROTO(PF_IEEE802154);