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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> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
9ec76716 SL |
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 | ||
f0166e5e DES |
38 | #include <net/af_ieee802154.h> |
39 | #include <net/ieee802154_netdev.h> | |
9ec76716 SL |
40 | |
41 | #include "af802154.h" | |
42 | ||
9ec76716 SL |
43 | /* |
44 | * Utility function for families | |
45 | */ | |
46 | struct 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 | ||
96 | static 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 | } | |
106 | static 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 | ||
114 | static 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 | ||
125 | static 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 | ||
136 | static 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; |
9ec76716 SL |
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) |
9ec76716 SL |
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 | ||
161 | static 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 | ||
182 | static 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 | ||
207 | static 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 | */ | |
237 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 238 | int protocol, int kern) |
9ec76716 SL |
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)) |
9ec76716 SL |
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 | } | |
285 | out: | |
286 | return rc; | |
287 | } | |
288 | ||
ec1b4cf7 | 289 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
290 | .family = PF_IEEE802154, |
291 | .create = ieee802154_create, | |
292 | .owner = THIS_MODULE, | |
293 | }; | |
294 | ||
295 | static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, | |
296 | struct packet_type *pt, struct net_device *orig_dev) | |
297 | { | |
9ec76716 SL |
298 | if (!netif_running(dev)) |
299 | return -ENODEV; | |
300 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); | |
25502bda DES |
301 | #ifdef DEBUG |
302 | print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len); | |
303 | #endif | |
9ec76716 SL |
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 | ||
316 | drop: | |
317 | kfree_skb(skb); | |
318 | return NET_RX_DROP; | |
319 | } | |
320 | ||
321 | ||
322 | static struct packet_type ieee802154_packet_type = { | |
323 | .type = __constant_htons(ETH_P_IEEE802154), | |
324 | .func = ieee802154_rcv, | |
325 | }; | |
326 | ||
327 | static 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 | ||
348 | err_sock: | |
349 | proto_unregister(&ieee802154_dgram_prot); | |
350 | err_dgram: | |
351 | proto_unregister(&ieee802154_raw_prot); | |
352 | out: | |
353 | return rc; | |
354 | } | |
355 | static 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 | ||
363 | module_init(af_ieee802154_init); | |
364 | module_exit(af_ieee802154_remove); | |
365 | ||
366 | MODULE_LICENSE("GPL"); | |
367 | MODULE_ALIAS_NETPROTO(PF_IEEE802154); |