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 | * | |
9ec76716 SL |
15 | * Written by: |
16 | * Sergey Lapin <slapin@ossfans.org> | |
17 | * Maxim Gorbachyov <maxim.gorbachev@siemens.com> | |
18 | */ | |
19 | ||
20 | #include <linux/net.h> | |
21 | #include <linux/capability.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/if.h> | |
25 | #include <linux/termios.h> /* For TIOCOUTQ/INQ */ | |
26 | #include <linux/list.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
9ec76716 SL |
28 | #include <net/datalink.h> |
29 | #include <net/psnap.h> | |
30 | #include <net/sock.h> | |
31 | #include <net/tcp_states.h> | |
32 | #include <net/route.h> | |
33 | ||
f0166e5e DES |
34 | #include <net/af_ieee802154.h> |
35 | #include <net/ieee802154_netdev.h> | |
9ec76716 SL |
36 | |
37 | #include "af802154.h" | |
38 | ||
4710d806 | 39 | /* Utility function for families */ |
e6278d92 PB |
40 | struct net_device* |
41 | ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) | |
9ec76716 SL |
42 | { |
43 | struct net_device *dev = NULL; | |
44 | struct net_device *tmp; | |
b70ab2e8 | 45 | __le16 pan_id, short_addr; |
e6278d92 | 46 | u8 hwaddr[IEEE802154_ADDR_LEN]; |
9ec76716 | 47 | |
e6278d92 | 48 | switch (addr->mode) { |
9ec76716 | 49 | case IEEE802154_ADDR_LONG: |
e6278d92 | 50 | ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); |
941666c2 | 51 | rcu_read_lock(); |
e6278d92 | 52 | dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); |
9ec76716 SL |
53 | if (dev) |
54 | dev_hold(dev); | |
941666c2 | 55 | rcu_read_unlock(); |
9ec76716 SL |
56 | break; |
57 | case IEEE802154_ADDR_SHORT: | |
e6278d92 PB |
58 | if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || |
59 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || | |
06324f2f | 60 | addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) |
9ec76716 SL |
61 | break; |
62 | ||
63 | rtnl_lock(); | |
64 | ||
65 | for_each_netdev(net, tmp) { | |
66 | if (tmp->type != ARPHRD_IEEE802154) | |
67 | continue; | |
68 | ||
69 | pan_id = ieee802154_mlme_ops(tmp)->get_pan_id(tmp); | |
70 | short_addr = | |
71 | ieee802154_mlme_ops(tmp)->get_short_addr(tmp); | |
72 | ||
e6278d92 PB |
73 | if (pan_id == addr->pan_id && |
74 | short_addr == addr->short_addr) { | |
9ec76716 SL |
75 | dev = tmp; |
76 | dev_hold(dev); | |
77 | break; | |
78 | } | |
79 | } | |
80 | ||
81 | rtnl_unlock(); | |
82 | break; | |
83 | default: | |
4710d806 VB |
84 | pr_warn("Unsupported ieee802154 address type: %d\n", |
85 | addr->mode); | |
9ec76716 SL |
86 | break; |
87 | } | |
88 | ||
89 | return dev; | |
90 | } | |
91 | ||
92 | static int ieee802154_sock_release(struct socket *sock) | |
93 | { | |
94 | struct sock *sk = sock->sk; | |
95 | ||
96 | if (sk) { | |
97 | sock->sk = NULL; | |
98 | sk->sk_prot->close(sk, 0); | |
99 | } | |
100 | return 0; | |
101 | } | |
6c10dc05 | 102 | |
9ec76716 | 103 | static int ieee802154_sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
4710d806 | 104 | struct msghdr *msg, size_t len) |
9ec76716 SL |
105 | { |
106 | struct sock *sk = sock->sk; | |
107 | ||
108 | return sk->sk_prot->sendmsg(iocb, sk, msg, len); | |
109 | } | |
110 | ||
111 | static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr, | |
4710d806 | 112 | int addr_len) |
9ec76716 SL |
113 | { |
114 | struct sock *sk = sock->sk; | |
115 | ||
116 | if (sk->sk_prot->bind) | |
117 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
118 | ||
119 | return sock_no_bind(sock, uaddr, addr_len); | |
120 | } | |
121 | ||
122 | static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr, | |
4710d806 | 123 | int addr_len, int flags) |
9ec76716 SL |
124 | { |
125 | struct sock *sk = sock->sk; | |
126 | ||
6503d961 CG |
127 | if (addr_len < sizeof(uaddr->sa_family)) |
128 | return -EINVAL; | |
129 | ||
9ec76716 SL |
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, | |
4710d806 | 137 | unsigned int cmd) |
9ec76716 SL |
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 | |
93c0c8b4 SS |
151 | if (!dev) |
152 | return -ENODEV; | |
153 | ||
929122cd | 154 | if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) |
9ec76716 SL |
155 | ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd); |
156 | ||
157 | if (!ret && copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
158 | ret = -EFAULT; | |
159 | dev_put(dev); | |
160 | ||
161 | return ret; | |
162 | } | |
163 | ||
164 | static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd, | |
4710d806 | 165 | unsigned long arg) |
9ec76716 SL |
166 | { |
167 | struct sock *sk = sock->sk; | |
168 | ||
169 | switch (cmd) { | |
170 | case SIOCGSTAMP: | |
171 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
172 | case SIOCGSTAMPNS: | |
173 | return sock_get_timestampns(sk, (struct timespec __user *)arg); | |
174 | case SIOCGIFADDR: | |
175 | case SIOCSIFADDR: | |
176 | return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg, | |
177 | cmd); | |
178 | default: | |
179 | if (!sk->sk_prot->ioctl) | |
180 | return -ENOIOCTLCMD; | |
181 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
182 | } | |
183 | } | |
184 | ||
185 | static const struct proto_ops ieee802154_raw_ops = { | |
186 | .family = PF_IEEE802154, | |
187 | .owner = THIS_MODULE, | |
188 | .release = ieee802154_sock_release, | |
189 | .bind = ieee802154_sock_bind, | |
190 | .connect = ieee802154_sock_connect, | |
191 | .socketpair = sock_no_socketpair, | |
192 | .accept = sock_no_accept, | |
193 | .getname = sock_no_getname, | |
194 | .poll = datagram_poll, | |
195 | .ioctl = ieee802154_sock_ioctl, | |
196 | .listen = sock_no_listen, | |
197 | .shutdown = sock_no_shutdown, | |
198 | .setsockopt = sock_common_setsockopt, | |
199 | .getsockopt = sock_common_getsockopt, | |
200 | .sendmsg = ieee802154_sock_sendmsg, | |
201 | .recvmsg = sock_common_recvmsg, | |
202 | .mmap = sock_no_mmap, | |
203 | .sendpage = sock_no_sendpage, | |
204 | #ifdef CONFIG_COMPAT | |
205 | .compat_setsockopt = compat_sock_common_setsockopt, | |
206 | .compat_getsockopt = compat_sock_common_getsockopt, | |
207 | #endif | |
208 | }; | |
209 | ||
210 | static const struct proto_ops ieee802154_dgram_ops = { | |
211 | .family = PF_IEEE802154, | |
212 | .owner = THIS_MODULE, | |
213 | .release = ieee802154_sock_release, | |
214 | .bind = ieee802154_sock_bind, | |
215 | .connect = ieee802154_sock_connect, | |
216 | .socketpair = sock_no_socketpair, | |
217 | .accept = sock_no_accept, | |
218 | .getname = sock_no_getname, | |
219 | .poll = datagram_poll, | |
220 | .ioctl = ieee802154_sock_ioctl, | |
221 | .listen = sock_no_listen, | |
222 | .shutdown = sock_no_shutdown, | |
223 | .setsockopt = sock_common_setsockopt, | |
224 | .getsockopt = sock_common_getsockopt, | |
225 | .sendmsg = ieee802154_sock_sendmsg, | |
226 | .recvmsg = sock_common_recvmsg, | |
227 | .mmap = sock_no_mmap, | |
228 | .sendpage = sock_no_sendpage, | |
229 | #ifdef CONFIG_COMPAT | |
230 | .compat_setsockopt = compat_sock_common_setsockopt, | |
231 | .compat_getsockopt = compat_sock_common_getsockopt, | |
232 | #endif | |
233 | }; | |
234 | ||
4710d806 | 235 | /* Create a socket. Initialise the socket, blank the addresses |
9ec76716 SL |
236 | * set the state. |
237 | */ | |
238 | static int ieee802154_create(struct net *net, struct socket *sock, | |
3f378b68 | 239 | int protocol, int kern) |
9ec76716 SL |
240 | { |
241 | struct sock *sk; | |
242 | int rc; | |
243 | struct proto *proto; | |
244 | const struct proto_ops *ops; | |
245 | ||
09ad9bc7 | 246 | if (!net_eq(net, &init_net)) |
9ec76716 SL |
247 | return -EAFNOSUPPORT; |
248 | ||
249 | switch (sock->type) { | |
250 | case SOCK_RAW: | |
251 | proto = &ieee802154_raw_prot; | |
252 | ops = &ieee802154_raw_ops; | |
253 | break; | |
254 | case SOCK_DGRAM: | |
255 | proto = &ieee802154_dgram_prot; | |
256 | ops = &ieee802154_dgram_ops; | |
257 | break; | |
258 | default: | |
259 | rc = -ESOCKTNOSUPPORT; | |
260 | goto out; | |
261 | } | |
262 | ||
263 | rc = -ENOMEM; | |
264 | sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto); | |
265 | if (!sk) | |
266 | goto out; | |
267 | rc = 0; | |
268 | ||
269 | sock->ops = ops; | |
270 | ||
271 | sock_init_data(sock, sk); | |
272 | /* FIXME: sk->sk_destruct */ | |
273 | sk->sk_family = PF_IEEE802154; | |
274 | ||
275 | /* Checksums on by default */ | |
276 | sock_set_flag(sk, SOCK_ZAPPED); | |
277 | ||
278 | if (sk->sk_prot->hash) | |
279 | sk->sk_prot->hash(sk); | |
280 | ||
281 | if (sk->sk_prot->init) { | |
282 | rc = sk->sk_prot->init(sk); | |
283 | if (rc) | |
284 | sk_common_release(sk); | |
285 | } | |
286 | out: | |
287 | return rc; | |
288 | } | |
289 | ||
ec1b4cf7 | 290 | static const struct net_proto_family ieee802154_family_ops = { |
9ec76716 SL |
291 | .family = PF_IEEE802154, |
292 | .create = ieee802154_create, | |
293 | .owner = THIS_MODULE, | |
294 | }; | |
295 | ||
296 | static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, | |
4710d806 | 297 | struct packet_type *pt, struct net_device *orig_dev) |
9ec76716 | 298 | { |
9ec76716 | 299 | if (!netif_running(dev)) |
fa1da883 | 300 | goto drop; |
9ec76716 | 301 | pr_debug("got frame, type %d, dev %p\n", dev->type, dev); |
25502bda | 302 | #ifdef DEBUG |
4710d806 VB |
303 | print_hex_dump_bytes("ieee802154_rcv ", |
304 | DUMP_PREFIX_NONE, skb->data, skb->len); | |
25502bda | 305 | #endif |
9ec76716 SL |
306 | |
307 | if (!net_eq(dev_net(dev), &init_net)) | |
308 | goto drop; | |
309 | ||
310 | ieee802154_raw_deliver(dev, skb); | |
311 | ||
312 | if (dev->type != ARPHRD_IEEE802154) | |
313 | goto drop; | |
314 | ||
315 | if (skb->pkt_type != PACKET_OTHERHOST) | |
316 | return ieee802154_dgram_deliver(dev, skb); | |
317 | ||
318 | drop: | |
319 | kfree_skb(skb); | |
320 | return NET_RX_DROP; | |
321 | } | |
322 | ||
9ec76716 | 323 | static struct packet_type ieee802154_packet_type = { |
ec633eb5 | 324 | .type = htons(ETH_P_IEEE802154), |
9ec76716 SL |
325 | .func = ieee802154_rcv, |
326 | }; | |
327 | ||
328 | static int __init af_ieee802154_init(void) | |
329 | { | |
330 | int rc = -EINVAL; | |
331 | ||
332 | rc = proto_register(&ieee802154_raw_prot, 1); | |
333 | if (rc) | |
334 | goto out; | |
335 | ||
336 | rc = proto_register(&ieee802154_dgram_prot, 1); | |
337 | if (rc) | |
338 | goto err_dgram; | |
339 | ||
340 | /* Tell SOCKET that we are alive */ | |
341 | rc = sock_register(&ieee802154_family_ops); | |
342 | if (rc) | |
343 | goto err_sock; | |
344 | dev_add_pack(&ieee802154_packet_type); | |
345 | ||
346 | rc = 0; | |
347 | goto out; | |
348 | ||
349 | err_sock: | |
350 | proto_unregister(&ieee802154_dgram_prot); | |
351 | err_dgram: | |
352 | proto_unregister(&ieee802154_raw_prot); | |
353 | out: | |
354 | return rc; | |
355 | } | |
6c10dc05 | 356 | |
9ec76716 SL |
357 | static void __exit af_ieee802154_remove(void) |
358 | { | |
359 | dev_remove_pack(&ieee802154_packet_type); | |
360 | sock_unregister(PF_IEEE802154); | |
361 | proto_unregister(&ieee802154_dgram_prot); | |
362 | proto_unregister(&ieee802154_raw_prot); | |
363 | } | |
364 | ||
365 | module_init(af_ieee802154_init); | |
366 | module_exit(af_ieee802154_remove); | |
367 | ||
368 | MODULE_LICENSE("GPL"); | |
369 | MODULE_ALIAS_NETPROTO(PF_IEEE802154); |