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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> | |
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> |
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 | ||
ec1b4cf7 | 288 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
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 DES |
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); |