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> | |
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 | */ | |
e6278d92 PB |
46 | struct net_device* |
47 | ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) | |
9ec76716 SL |
48 | { |
49 | struct net_device *dev = NULL; | |
50 | struct net_device *tmp; | |
b70ab2e8 | 51 | __le16 pan_id, short_addr; |
e6278d92 | 52 | u8 hwaddr[IEEE802154_ADDR_LEN]; |
9ec76716 | 53 | |
e6278d92 | 54 | switch (addr->mode) { |
9ec76716 | 55 | case IEEE802154_ADDR_LONG: |
e6278d92 | 56 | ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); |
941666c2 | 57 | rcu_read_lock(); |
e6278d92 | 58 | dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); |
9ec76716 SL |
59 | if (dev) |
60 | dev_hold(dev); | |
941666c2 | 61 | rcu_read_unlock(); |
9ec76716 SL |
62 | break; |
63 | case IEEE802154_ADDR_SHORT: | |
e6278d92 PB |
64 | if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || |
65 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
06324f2f | 66 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) |
9ec76716 SL |
67 | break; |
68 | ||
69 | rtnl_lock(); | |
70 | ||
71 | for_each_netdev(net, tmp) { | |
72 | if (tmp->type != ARPHRD_IEEE802154) | |
73 | continue; | |
74 | ||
75 | pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp); | |
76 | short_addr = | |
77 | ieee802154_mlme_ops(tmp)->get_short_addr(tmp); | |
78 | ||
e6278d92 PB |
79 | if (pan_id == addr->pan_id && |
80 | short_addr == addr->short_addr) { | |
9ec76716 SL |
81 | dev = tmp; |
82 | dev_hold(dev); | |
83 | break; | |
84 | } | |
85 | } | |
86 | ||
87 | rtnl_unlock(); | |
88 | break; | |
89 | default: | |
90 | pr_warning("Unsupported ieee802154 address type: %d\n", | |
e6278d92 | 91 | addr->mode); |
9ec76716 SL |
92 | break; |
93 | } | |
94 | ||
95 | return dev; | |
96 | } | |
97 | ||
98 | static int ieee802154_sock_release(struct socket *sock) | |
99 | { | |
100 | struct sock *sk = sock->sk; | |
101 | ||
102 | if (sk) { | |
103 | sock->sk = NULL; | |
104 | sk->sk_prot->close(sk, 0); | |
105 | } | |
106 | return 0; | |
107 | } | |
108 | static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
109 | struct msghdr *msg, size_t len) | |
110 | { | |
111 | struct sock *sk = sock->sk; | |
112 | ||
113 | return sk->sk_prot->sendmsg(iocb, sk, msg, len); | |
114 | } | |
115 | ||
116 | static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr, | |
117 | int addr_len) | |
118 | { | |
119 | struct sock *sk = sock->sk; | |
120 | ||
121 | if (sk->sk_prot->bind) | |
122 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
123 | ||
124 | return sock_no_bind(sock, uaddr, addr_len); | |
125 | } | |
126 | ||
127 | static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr, | |
128 | int addr_len, int flags) | |
129 | { | |
130 | struct sock *sk = sock->sk; | |
131 | ||
6503d961 CG |
132 | if (addr_len < sizeof(uaddr->sa_family)) |
133 | return -EINVAL; | |
134 | ||
9ec76716 SL |
135 | if (uaddr->sa_family == AF_UNSPEC) |
136 | return sk->sk_prot->disconnect(sk, flags); | |
137 | ||
138 | return sk->sk_prot->connect(sk, uaddr, addr_len); | |
139 | } | |
140 | ||
141 | static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg, | |
142 | unsigned int cmd) | |
143 | { | |
144 | struct ifreq ifr; | |
45a41d14 | 145 | int ret = -ENOIOCTLCMD; |
9ec76716 SL |
146 | struct net_device *dev; |
147 | ||
148 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
149 | return -EFAULT; | |
150 | ||
151 | ifr.ifr_name[IFNAMSIZ-1] = 0; | |
152 | ||
153 | dev_load(sock_net(sk), ifr.ifr_name); | |
154 | dev = dev_get_by_name(sock_net(sk), ifr.ifr_name); | |
45a41d14 | 155 | |
93c0c8b4 SS |
156 | if (!dev) |
157 | return -ENODEV; | |
158 | ||
929122cd | 159 | if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) |
9ec76716 SL |
160 | ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd); |
161 | ||
162 | if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
163 | ret = -EFAULT; | |
164 | dev_put(dev); | |
165 | ||
166 | return ret; | |
167 | } | |
168 | ||
169 | static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd, | |
170 | unsigned long arg) | |
171 | { | |
172 | struct sock *sk = sock->sk; | |
173 | ||
174 | switch (cmd) { | |
175 | case SIOCGSTAMP: | |
176 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
177 | case SIOCGSTAMPNS: | |
178 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
179 | case SIOCGIFADDR: | |
180 | case SIOCSIFADDR: | |
181 | return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg, | |
182 | cmd); | |
183 | default: | |
184 | if (!sk->sk_prot->ioctl) | |
185 | return -ENOIOCTLCMD; | |
186 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
187 | } | |
188 | } | |
189 | ||
190 | static const struct proto_ops ieee802154_raw_ops = { | |
191 | .family = PF_IEEE802154, | |
192 | .owner = THIS_MODULE, | |
193 | .release = ieee802154_sock_release, | |
194 | .bind = ieee802154_sock_bind, | |
195 | .connect = ieee802154_sock_connect, | |
196 | .socketpair = sock_no_socketpair, | |
197 | .accept = sock_no_accept, | |
198 | .getname = sock_no_getname, | |
199 | .poll = datagram_poll, | |
200 | .ioctl = ieee802154_sock_ioctl, | |
201 | .listen = sock_no_listen, | |
202 | .shutdown = sock_no_shutdown, | |
203 | .setsockopt = sock_common_setsockopt, | |
204 | .getsockopt = sock_common_getsockopt, | |
205 | .sendmsg = ieee802154_sock_sendmsg, | |
206 | .recvmsg = sock_common_recvmsg, | |
207 | .mmap = sock_no_mmap, | |
208 | .sendpage = sock_no_sendpage, | |
209 | #ifdef CONFIG_COMPAT | |
210 | .compat_setsockopt = compat_sock_common_setsockopt, | |
211 | .compat_getsockopt = compat_sock_common_getsockopt, | |
212 | #endif | |
213 | }; | |
214 | ||
215 | static const struct proto_ops ieee802154_dgram_ops = { | |
216 | .family = PF_IEEE802154, | |
217 | .owner = THIS_MODULE, | |
218 | .release = ieee802154_sock_release, | |
219 | .bind = ieee802154_sock_bind, | |
220 | .connect = ieee802154_sock_connect, | |
221 | .socketpair = sock_no_socketpair, | |
222 | .accept = sock_no_accept, | |
223 | .getname = sock_no_getname, | |
224 | .poll = datagram_poll, | |
225 | .ioctl = ieee802154_sock_ioctl, | |
226 | .listen = sock_no_listen, | |
227 | .shutdown = sock_no_shutdown, | |
228 | .setsockopt = sock_common_setsockopt, | |
229 | .getsockopt = sock_common_getsockopt, | |
230 | .sendmsg = ieee802154_sock_sendmsg, | |
231 | .recvmsg = sock_common_recvmsg, | |
232 | .mmap = sock_no_mmap, | |
233 | .sendpage = sock_no_sendpage, | |
234 | #ifdef CONFIG_COMPAT | |
235 | .compat_setsockopt = compat_sock_common_setsockopt, | |
236 | .compat_getsockopt = compat_sock_common_getsockopt, | |
237 | #endif | |
238 | }; | |
239 | ||
240 | ||
241 | /* | |
242 | * Create a socket. Initialise the socket, blank the addresses | |
243 | * set the state. | |
244 | */ | |
245 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 246 | int protocol, int kern) |
9ec76716 SL |
247 | { |
248 | struct sock *sk; | |
249 | int rc; | |
250 | struct proto *proto; | |
251 | const struct proto_ops *ops; | |
252 | ||
09ad9bc7 | 253 | if (!net_eq(net, &init_net)) |
9ec76716 SL |
254 | return -EAFNOSUPPORT; |
255 | ||
256 | switch (sock->type) { | |
257 | case SOCK_RAW: | |
258 | proto = &ieee802154_raw_prot; | |
259 | ops = &ieee802154_raw_ops; | |
260 | break; | |
261 | case SOCK_DGRAM: | |
262 | proto = &ieee802154_dgram_prot; | |
263 | ops = &ieee802154_dgram_ops; | |
264 | break; | |
265 | default: | |
266 | rc = -ESOCKTNOSUPPORT; | |
267 | goto out; | |
268 | } | |
269 | ||
270 | rc = -ENOMEM; | |
271 | sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto); | |
272 | if (!sk) | |
273 | goto out; | |
274 | rc = 0; | |
275 | ||
276 | sock->ops = ops; | |
277 | ||
278 | sock_init_data(sock, sk); | |
279 | /* FIXME: sk->sk_destruct */ | |
280 | sk->sk_family = PF_IEEE802154; | |
281 | ||
282 | /* Checksums on by default */ | |
283 | sock_set_flag(sk, SOCK_ZAPPED); | |
284 | ||
285 | if (sk->sk_prot->hash) | |
286 | sk->sk_prot->hash(sk); | |
287 | ||
288 | if (sk->sk_prot->init) { | |
289 | rc = sk->sk_prot->init(sk); | |
290 | if (rc) | |
291 | sk_common_release(sk); | |
292 | } | |
293 | out: | |
294 | return rc; | |
295 | } | |
296 | ||
ec1b4cf7 | 297 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
298 | .family = PF_IEEE802154, |
299 | .create = ieee802154_create, | |
300 | .owner = THIS_MODULE, | |
301 | }; | |
302 | ||
303 | static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, | |
304 | struct packet_type *pt, struct net_device *orig_dev) | |
305 | { | |
9ec76716 | 306 | if (!netif_running(dev)) |
fa1da883 | 307 | goto drop; |
9ec76716 | 308 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
25502bda DB |
309 | #ifdef DEBUG |
310 | print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len); | |
311 | #endif | |
9ec76716 SL |
312 | |
313 | if (!net_eq(dev_net(dev), &init_net)) | |
314 | goto drop; | |
315 | ||
316 | ieee802154_raw_deliver(dev, skb); | |
317 | ||
318 | if (dev->type != ARPHRD_IEEE802154) | |
319 | goto drop; | |
320 | ||
321 | if (skb->pkt_type != PACKET_OTHERHOST) | |
322 | return ieee802154_dgram_deliver(dev, skb); | |
323 | ||
324 | drop: | |
325 | kfree_skb(skb); | |
326 | return NET_RX_DROP; | |
327 | } | |
328 | ||
329 | ||
330 | static struct packet_type ieee802154_packet_type = { | |
ec633eb5 | 331 | .type = htons(ETH_P_IEEE802154), |
9ec76716 SL |
332 | .func = ieee802154_rcv, |
333 | }; | |
334 | ||
335 | static int __init af_ieee802154_init(void) | |
336 | { | |
337 | int rc = -EINVAL; | |
338 | ||
339 | rc = proto_register(&ieee802154_raw_prot, 1); | |
340 | if (rc) | |
341 | goto out; | |
342 | ||
343 | rc = proto_register(&ieee802154_dgram_prot, 1); | |
344 | if (rc) | |
345 | goto err_dgram; | |
346 | ||
347 | /* Tell SOCKET that we are alive */ | |
348 | rc = sock_register(&ieee802154_family_ops); | |
349 | if (rc) | |
350 | goto err_sock; | |
351 | dev_add_pack(&ieee802154_packet_type); | |
352 | ||
353 | rc = 0; | |
354 | goto out; | |
355 | ||
356 | err_sock: | |
357 | proto_unregister(&ieee802154_dgram_prot); | |
358 | err_dgram: | |
359 | proto_unregister(&ieee802154_raw_prot); | |
360 | out: | |
361 | return rc; | |
362 | } | |
363 | static void __exit af_ieee802154_remove(void) | |
364 | { | |
365 | dev_remove_pack(&ieee802154_packet_type); | |
366 | sock_unregister(PF_IEEE802154); | |
367 | proto_unregister(&ieee802154_dgram_prot); | |
368 | proto_unregister(&ieee802154_raw_prot); | |
369 | } | |
370 | ||
371 | module_init(af_ieee802154_init); | |
372 | module_exit(af_ieee802154_remove); | |
373 | ||
374 | MODULE_LICENSE("GPL"); | |
375 | MODULE_ALIAS_NETPROTO(PF_IEEE802154); |