Commit | Line | Data |
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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 | ||
4710d806 | 43 | /* Utility function for families */ |
e6278d92 PB |
44 | struct net_device* |
45 | ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) | |
9ec76716 SL |
46 | { |
47 | struct net_device *dev = NULL; | |
48 | struct net_device *tmp; | |
b70ab2e8 | 49 | __le16 pan_id, short_addr; |
e6278d92 | 50 | u8 hwaddr[IEEE802154_ADDR_LEN]; |
9ec76716 | 51 | |
e6278d92 | 52 | switch (addr->mode) { |
9ec76716 | 53 | case IEEE802154_ADDR_LONG: |
e6278d92 | 54 | ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); |
941666c2 | 55 | rcu_read_lock(); |
e6278d92 | 56 | dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); |
9ec76716 SL |
57 | if (dev) |
58 | dev_hold(dev); | |
941666c2 | 59 | rcu_read_unlock(); |
9ec76716 SL |
60 | break; |
61 | case IEEE802154_ADDR_SHORT: | |
e6278d92 PB |
62 | if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || |
63 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
06324f2f | 64 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) |
9ec76716 SL |
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 | ||
e6278d92 PB |
77 | if (pan_id == addr->pan_id && |
78 | short_addr == addr->short_addr) { | |
9ec76716 SL |
79 | dev = tmp; |
80 | dev_hold(dev); | |
81 | break; | |
82 | } | |
83 | } | |
84 | ||
85 | rtnl_unlock(); | |
86 | break; | |
87 | default: | |
4710d806 VB |
88 | pr_warn("Unsupported ieee802154 address type: %d\n", |
89 | addr->mode); | |
9ec76716 SL |
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, | |
4710d806 | 107 | struct msghdr *msg, size_t len) |
9ec76716 SL |
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, | |
4710d806 | 115 | int addr_len) |
9ec76716 SL |
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, | |
4710d806 | 126 | int addr_len, int flags) |
9ec76716 SL |
127 | { |
128 | struct sock *sk = sock->sk; | |
129 | ||
6503d961 CG |
130 | if (addr_len < sizeof(uaddr->sa_family)) |
131 | return -EINVAL; | |
132 | ||
9ec76716 SL |
133 | if (uaddr->sa_family == AF_UNSPEC) |
134 | return sk->sk_prot->disconnect(sk, flags); | |
135 | ||
136 | return sk->sk_prot->connect(sk, uaddr, addr_len); | |
137 | } | |
138 | ||
139 | static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg, | |
4710d806 | 140 | unsigned int cmd) |
9ec76716 SL |
141 | { |
142 | struct ifreq ifr; | |
45a41d14 | 143 | int ret = -ENOIOCTLCMD; |
9ec76716 SL |
144 | struct net_device *dev; |
145 | ||
146 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
147 | return -EFAULT; | |
148 | ||
149 | ifr.ifr_name[IFNAMSIZ-1] = 0; | |
150 | ||
151 | dev_load(sock_net(sk), ifr.ifr_name); | |
152 | dev = dev_get_by_name(sock_net(sk), ifr.ifr_name); | |
45a41d14 | 153 | |
93c0c8b4 SS |
154 | if (!dev) |
155 | return -ENODEV; | |
156 | ||
929122cd | 157 | if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) |
9ec76716 SL |
158 | ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd); |
159 | ||
160 | if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
161 | ret = -EFAULT; | |
162 | dev_put(dev); | |
163 | ||
164 | return ret; | |
165 | } | |
166 | ||
167 | static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd, | |
4710d806 | 168 | unsigned long arg) |
9ec76716 SL |
169 | { |
170 | struct sock *sk = sock->sk; | |
171 | ||
172 | switch (cmd) { | |
173 | case SIOCGSTAMP: | |
174 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
175 | case SIOCGSTAMPNS: | |
176 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
177 | case SIOCGIFADDR: | |
178 | case SIOCSIFADDR: | |
179 | return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg, | |
180 | cmd); | |
181 | default: | |
182 | if (!sk->sk_prot->ioctl) | |
183 | return -ENOIOCTLCMD; | |
184 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
185 | } | |
186 | } | |
187 | ||
188 | static const struct proto_ops ieee802154_raw_ops = { | |
189 | .family = PF_IEEE802154, | |
190 | .owner = THIS_MODULE, | |
191 | .release = ieee802154_sock_release, | |
192 | .bind = ieee802154_sock_bind, | |
193 | .connect = ieee802154_sock_connect, | |
194 | .socketpair = sock_no_socketpair, | |
195 | .accept = sock_no_accept, | |
196 | .getname = sock_no_getname, | |
197 | .poll = datagram_poll, | |
198 | .ioctl = ieee802154_sock_ioctl, | |
199 | .listen = sock_no_listen, | |
200 | .shutdown = sock_no_shutdown, | |
201 | .setsockopt = sock_common_setsockopt, | |
202 | .getsockopt = sock_common_getsockopt, | |
203 | .sendmsg = ieee802154_sock_sendmsg, | |
204 | .recvmsg = sock_common_recvmsg, | |
205 | .mmap = sock_no_mmap, | |
206 | .sendpage = sock_no_sendpage, | |
207 | #ifdef CONFIG_COMPAT | |
208 | .compat_setsockopt = compat_sock_common_setsockopt, | |
209 | .compat_getsockopt = compat_sock_common_getsockopt, | |
210 | #endif | |
211 | }; | |
212 | ||
213 | static const struct proto_ops ieee802154_dgram_ops = { | |
214 | .family = PF_IEEE802154, | |
215 | .owner = THIS_MODULE, | |
216 | .release = ieee802154_sock_release, | |
217 | .bind = ieee802154_sock_bind, | |
218 | .connect = ieee802154_sock_connect, | |
219 | .socketpair = sock_no_socketpair, | |
220 | .accept = sock_no_accept, | |
221 | .getname = sock_no_getname, | |
222 | .poll = datagram_poll, | |
223 | .ioctl = ieee802154_sock_ioctl, | |
224 | .listen = sock_no_listen, | |
225 | .shutdown = sock_no_shutdown, | |
226 | .setsockopt = sock_common_setsockopt, | |
227 | .getsockopt = sock_common_getsockopt, | |
228 | .sendmsg = ieee802154_sock_sendmsg, | |
229 | .recvmsg = sock_common_recvmsg, | |
230 | .mmap = sock_no_mmap, | |
231 | .sendpage = sock_no_sendpage, | |
232 | #ifdef CONFIG_COMPAT | |
233 | .compat_setsockopt = compat_sock_common_setsockopt, | |
234 | .compat_getsockopt = compat_sock_common_getsockopt, | |
235 | #endif | |
236 | }; | |
237 | ||
238 | ||
4710d806 | 239 | /* Create a socket. Initialise the socket, blank the addresses |
9ec76716 SL |
240 | * set the state. |
241 | */ | |
242 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 243 | int protocol, int kern) |
9ec76716 SL |
244 | { |
245 | struct sock *sk; | |
246 | int rc; | |
247 | struct proto *proto; | |
248 | const struct proto_ops *ops; | |
249 | ||
09ad9bc7 | 250 | if (!net_eq(net, &init_net)) |
9ec76716 SL |
251 | return -EAFNOSUPPORT; |
252 | ||
253 | switch (sock->type) { | |
254 | case SOCK_RAW: | |
255 | proto = &ieee802154_raw_prot; | |
256 | ops = &ieee802154_raw_ops; | |
257 | break; | |
258 | case SOCK_DGRAM: | |
259 | proto = &ieee802154_dgram_prot; | |
260 | ops = &ieee802154_dgram_ops; | |
261 | break; | |
262 | default: | |
263 | rc = -ESOCKTNOSUPPORT; | |
264 | goto out; | |
265 | } | |
266 | ||
267 | rc = -ENOMEM; | |
268 | sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto); | |
269 | if (!sk) | |
270 | goto out; | |
271 | rc = 0; | |
272 | ||
273 | sock->ops = ops; | |
274 | ||
275 | sock_init_data(sock, sk); | |
276 | /* FIXME: sk->sk_destruct */ | |
277 | sk->sk_family = PF_IEEE802154; | |
278 | ||
279 | /* Checksums on by default */ | |
280 | sock_set_flag(sk, SOCK_ZAPPED); | |
281 | ||
282 | if (sk->sk_prot->hash) | |
283 | sk->sk_prot->hash(sk); | |
284 | ||
285 | if (sk->sk_prot->init) { | |
286 | rc = sk->sk_prot->init(sk); | |
287 | if (rc) | |
288 | sk_common_release(sk); | |
289 | } | |
290 | out: | |
291 | return rc; | |
292 | } | |
293 | ||
ec1b4cf7 | 294 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
295 | .family = PF_IEEE802154, |
296 | .create = ieee802154_create, | |
297 | .owner = THIS_MODULE, | |
298 | }; | |
299 | ||
300 | static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, | |
4710d806 | 301 | struct packet_type *pt, struct net_device *orig_dev) |
9ec76716 | 302 | { |
9ec76716 | 303 | if (!netif_running(dev)) |
fa1da883 | 304 | goto drop; |
9ec76716 | 305 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
25502bda | 306 | #ifdef DEBUG |
4710d806 VB |
307 | print_hex_dump_bytes("ieee802154_rcv ", |
308 | DUMP_PREFIX_NONE, skb->data, skb->len); | |
25502bda | 309 | #endif |
9ec76716 SL |
310 | |
311 | if (!net_eq(dev_net(dev), &init_net)) | |
312 | goto drop; | |
313 | ||
314 | ieee802154_raw_deliver(dev, skb); | |
315 | ||
316 | if (dev->type != ARPHRD_IEEE802154) | |
317 | goto drop; | |
318 | ||
319 | if (skb->pkt_type != PACKET_OTHERHOST) | |
320 | return ieee802154_dgram_deliver(dev, skb); | |
321 | ||
322 | drop: | |
323 | kfree_skb(skb); | |
324 | return NET_RX_DROP; | |
325 | } | |
326 | ||
327 | ||
328 | static struct packet_type ieee802154_packet_type = { | |
ec633eb5 | 329 | .type = htons(ETH_P_IEEE802154), |
9ec76716 SL |
330 | .func = ieee802154_rcv, |
331 | }; | |
332 | ||
333 | static int __init af_ieee802154_init(void) | |
334 | { | |
335 | int rc = -EINVAL; | |
336 | ||
337 | rc = proto_register(&ieee802154_raw_prot, 1); | |
338 | if (rc) | |
339 | goto out; | |
340 | ||
341 | rc = proto_register(&ieee802154_dgram_prot, 1); | |
342 | if (rc) | |
343 | goto err_dgram; | |
344 | ||
345 | /* Tell SOCKET that we are alive */ | |
346 | rc = sock_register(&ieee802154_family_ops); | |
347 | if (rc) | |
348 | goto err_sock; | |
349 | dev_add_pack(&ieee802154_packet_type); | |
350 | ||
351 | rc = 0; | |
352 | goto out; | |
353 | ||
354 | err_sock: | |
355 | proto_unregister(&ieee802154_dgram_prot); | |
356 | err_dgram: | |
357 | proto_unregister(&ieee802154_raw_prot); | |
358 | out: | |
359 | return rc; | |
360 | } | |
361 | static void __exit af_ieee802154_remove(void) | |
362 | { | |
363 | dev_remove_pack(&ieee802154_packet_type); | |
364 | sock_unregister(PF_IEEE802154); | |
365 | proto_unregister(&ieee802154_dgram_prot); | |
366 | proto_unregister(&ieee802154_raw_prot); | |
367 | } | |
368 | ||
369 | module_init(af_ieee802154_init); | |
370 | module_exit(af_ieee802154_remove); | |
371 | ||
372 | MODULE_LICENSE("GPL"); | |
373 | MODULE_ALIAS_NETPROTO(PF_IEEE802154); |