]>
Commit | Line | Data |
---|---|---|
4b07b3f6 RDC |
1 | /* |
2 | * File: af_phonet.c | |
3 | * | |
4 | * Phonet protocols family | |
5 | * | |
6 | * Copyright (C) 2008 Nokia Corporation. | |
7 | * | |
31fdc555 RDC |
8 | * Authors: Sakari Ailus <sakari.ailus@nokia.com> |
9 | * Rémi Denis-Courmont | |
4b07b3f6 RDC |
10 | * |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * version 2 as published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
23 | * 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
4b07b3f6 RDC |
29 | #include <asm/unaligned.h> |
30 | #include <net/sock.h> | |
31 | ||
32 | #include <linux/if_phonet.h> | |
33 | #include <linux/phonet.h> | |
34 | #include <net/phonet/phonet.h> | |
f8ff6028 | 35 | #include <net/phonet/pn_dev.h> |
4b07b3f6 | 36 | |
566521d6 AD |
37 | /* Transport protocol registration */ |
38 | static struct phonet_protocol *proto_tab[PHONET_NPROTO] __read_mostly; | |
566521d6 | 39 | |
facb4edc | 40 | static struct phonet_protocol *phonet_proto_get(unsigned int protocol) |
566521d6 AD |
41 | { |
42 | struct phonet_protocol *pp; | |
43 | ||
44 | if (protocol >= PHONET_NPROTO) | |
45 | return NULL; | |
46 | ||
7ed0132f | 47 | rcu_read_lock(); |
b2a5decd | 48 | pp = rcu_dereference(proto_tab[protocol]); |
566521d6 AD |
49 | if (pp && !try_module_get(pp->prot->owner)) |
50 | pp = NULL; | |
7ed0132f | 51 | rcu_read_unlock(); |
566521d6 AD |
52 | |
53 | return pp; | |
54 | } | |
55 | ||
56 | static inline void phonet_proto_put(struct phonet_protocol *pp) | |
57 | { | |
58 | module_put(pp->prot->owner); | |
59 | } | |
4b07b3f6 RDC |
60 | |
61 | /* protocol family functions */ | |
62 | ||
3f378b68 EP |
63 | static int pn_socket_create(struct net *net, struct socket *sock, int protocol, |
64 | int kern) | |
4b07b3f6 | 65 | { |
ba113a94 RDC |
66 | struct sock *sk; |
67 | struct pn_sock *pn; | |
4b07b3f6 RDC |
68 | struct phonet_protocol *pnp; |
69 | int err; | |
70 | ||
4b07b3f6 RDC |
71 | if (!capable(CAP_SYS_ADMIN)) |
72 | return -EPERM; | |
73 | ||
74 | if (protocol == 0) { | |
75 | /* Default protocol selection */ | |
76 | switch (sock->type) { | |
77 | case SOCK_DGRAM: | |
78 | protocol = PN_PROTO_PHONET; | |
79 | break; | |
9641458d RDC |
80 | case SOCK_SEQPACKET: |
81 | protocol = PN_PROTO_PIPE; | |
82 | break; | |
4b07b3f6 RDC |
83 | default: |
84 | return -EPROTONOSUPPORT; | |
85 | } | |
86 | } | |
87 | ||
88 | pnp = phonet_proto_get(protocol); | |
25532824 RDC |
89 | if (pnp == NULL && |
90 | request_module("net-pf-%d-proto-%d", PF_PHONET, protocol) == 0) | |
91 | pnp = phonet_proto_get(protocol); | |
95a5afca | 92 | |
4b07b3f6 RDC |
93 | if (pnp == NULL) |
94 | return -EPROTONOSUPPORT; | |
95 | if (sock->type != pnp->sock_type) { | |
96 | err = -EPROTONOSUPPORT; | |
97 | goto out; | |
98 | } | |
99 | ||
11aa9c28 | 100 | sk = sk_alloc(net, PF_PHONET, GFP_KERNEL, pnp->prot, kern); |
ba113a94 RDC |
101 | if (sk == NULL) { |
102 | err = -ENOMEM; | |
103 | goto out; | |
104 | } | |
105 | ||
106 | sock_init_data(sock, sk); | |
107 | sock->state = SS_UNCONNECTED; | |
108 | sock->ops = pnp->ops; | |
109 | sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; | |
110 | sk->sk_protocol = protocol; | |
111 | pn = pn_sk(sk); | |
112 | pn->sobject = 0; | |
a8059512 | 113 | pn->dobject = 0; |
ba113a94 RDC |
114 | pn->resource = 0; |
115 | sk->sk_prot->init(sk); | |
116 | err = 0; | |
4b07b3f6 RDC |
117 | |
118 | out: | |
119 | phonet_proto_put(pnp); | |
120 | return err; | |
121 | } | |
122 | ||
ec1b4cf7 | 123 | static const struct net_proto_family phonet_proto_family = { |
25532824 | 124 | .family = PF_PHONET, |
4b07b3f6 RDC |
125 | .create = pn_socket_create, |
126 | .owner = THIS_MODULE, | |
127 | }; | |
128 | ||
5f77076d RDC |
129 | /* Phonet device header operations */ |
130 | static int pn_header_create(struct sk_buff *skb, struct net_device *dev, | |
131 | unsigned short type, const void *daddr, | |
95c96174 | 132 | const void *saddr, unsigned int len) |
5f77076d RDC |
133 | { |
134 | u8 *media = skb_push(skb, 1); | |
135 | ||
136 | if (type != ETH_P_PHONET) | |
137 | return -1; | |
138 | ||
139 | if (!saddr) | |
140 | saddr = dev->dev_addr; | |
141 | *media = *(const u8 *)saddr; | |
142 | return 1; | |
143 | } | |
144 | ||
145 | static int pn_header_parse(const struct sk_buff *skb, unsigned char *haddr) | |
146 | { | |
147 | const u8 *media = skb_mac_header(skb); | |
148 | *haddr = *media; | |
149 | return 1; | |
150 | } | |
151 | ||
152 | struct header_ops phonet_header_ops = { | |
153 | .create = pn_header_create, | |
154 | .parse = pn_header_parse, | |
155 | }; | |
156 | EXPORT_SYMBOL(phonet_header_ops); | |
157 | ||
107d0d9b RDC |
158 | /* |
159 | * Prepends an ISI header and sends a datagram. | |
160 | */ | |
161 | static int pn_send(struct sk_buff *skb, struct net_device *dev, | |
be0c52bf | 162 | u16 dst, u16 src, u8 res, u8 irq) |
107d0d9b RDC |
163 | { |
164 | struct phonethdr *ph; | |
165 | int err; | |
166 | ||
ebfe92ca RDC |
167 | if (skb->len + 2 > 0xffff /* Phonet length field limit */ || |
168 | skb->len + sizeof(struct phonethdr) > dev->mtu) { | |
107d0d9b RDC |
169 | err = -EMSGSIZE; |
170 | goto drop; | |
171 | } | |
172 | ||
18a1166d RDC |
173 | /* Broadcast sending is not implemented */ |
174 | if (pn_addr(dst) == PNADDR_BROADCAST) { | |
175 | err = -EOPNOTSUPP; | |
176 | goto drop; | |
177 | } | |
178 | ||
107d0d9b RDC |
179 | skb_reset_transport_header(skb); |
180 | WARN_ON(skb_headroom(skb) & 1); /* HW assumes word alignment */ | |
181 | skb_push(skb, sizeof(struct phonethdr)); | |
182 | skb_reset_network_header(skb); | |
183 | ph = pn_hdr(skb); | |
184 | ph->pn_rdev = pn_dev(dst); | |
185 | ph->pn_sdev = pn_dev(src); | |
186 | ph->pn_res = res; | |
187 | ph->pn_length = __cpu_to_be16(skb->len + 2 - sizeof(*ph)); | |
188 | ph->pn_robj = pn_obj(dst); | |
189 | ph->pn_sobj = pn_obj(src); | |
190 | ||
191 | skb->protocol = htons(ETH_P_PHONET); | |
192 | skb->priority = 0; | |
193 | skb->dev = dev; | |
194 | ||
aa6c45f3 | 195 | if (skb->pkt_type == PACKET_LOOPBACK) { |
107d0d9b | 196 | skb_reset_mac_header(skb); |
107d0d9b | 197 | skb_orphan(skb); |
b765e84f | 198 | err = (irq ? netif_rx(skb) : netif_rx_ni(skb)) ? -ENOBUFS : 0; |
107d0d9b RDC |
199 | } else { |
200 | err = dev_hard_header(skb, dev, ntohs(skb->protocol), | |
201 | NULL, NULL, skb->len); | |
202 | if (err < 0) { | |
203 | err = -EHOSTUNREACH; | |
204 | goto drop; | |
205 | } | |
206 | err = dev_queue_xmit(skb); | |
b765e84f RDC |
207 | if (unlikely(err > 0)) |
208 | err = net_xmit_errno(err); | |
107d0d9b RDC |
209 | } |
210 | ||
211 | return err; | |
212 | drop: | |
213 | kfree_skb(skb); | |
214 | return err; | |
215 | } | |
216 | ||
be0c52bf RDC |
217 | static int pn_raw_send(const void *data, int len, struct net_device *dev, |
218 | u16 dst, u16 src, u8 res) | |
219 | { | |
220 | struct sk_buff *skb = alloc_skb(MAX_PHONET_HEADER + len, GFP_ATOMIC); | |
221 | if (skb == NULL) | |
222 | return -ENOMEM; | |
223 | ||
aa6c45f3 RDC |
224 | if (phonet_address_lookup(dev_net(dev), pn_addr(dst)) == 0) |
225 | skb->pkt_type = PACKET_LOOPBACK; | |
226 | ||
be0c52bf RDC |
227 | skb_reserve(skb, MAX_PHONET_HEADER); |
228 | __skb_put(skb, len); | |
229 | skb_copy_to_linear_data(skb, data, len); | |
230 | return pn_send(skb, dev, dst, src, res, 1); | |
231 | } | |
232 | ||
107d0d9b RDC |
233 | /* |
234 | * Create a Phonet header for the skb and send it out. Returns | |
235 | * non-zero error code if failed. The skb is freed then. | |
236 | */ | |
237 | int pn_skb_send(struct sock *sk, struct sk_buff *skb, | |
238 | const struct sockaddr_pn *target) | |
239 | { | |
aa6c45f3 | 240 | struct net *net = sock_net(sk); |
107d0d9b RDC |
241 | struct net_device *dev; |
242 | struct pn_sock *pn = pn_sk(sk); | |
243 | int err; | |
a8059512 RDC |
244 | u16 src, dst; |
245 | u8 daddr, saddr, res; | |
246 | ||
247 | src = pn->sobject; | |
248 | if (target != NULL) { | |
249 | dst = pn_sockaddr_get_object(target); | |
250 | res = pn_sockaddr_get_resource(target); | |
251 | } else { | |
252 | dst = pn->dobject; | |
253 | res = pn->resource; | |
254 | } | |
255 | daddr = pn_addr(dst); | |
107d0d9b RDC |
256 | |
257 | err = -EHOSTUNREACH; | |
258 | if (sk->sk_bound_dev_if) | |
aa6c45f3 RDC |
259 | dev = dev_get_by_index(net, sk->sk_bound_dev_if); |
260 | else if (phonet_address_lookup(net, daddr) == 0) { | |
261 | dev = phonet_device_get(net); | |
262 | skb->pkt_type = PACKET_LOOPBACK; | |
c69d4407 | 263 | } else if (dst == 0) { |
b6a563b2 | 264 | /* Resource routing (small race until phonet_rcv()) */ |
c69d4407 | 265 | struct sock *sk = pn_find_sock_by_res(net, res); |
b6a563b2 RDC |
266 | if (sk) { |
267 | sock_put(sk); | |
268 | dev = phonet_device_get(net); | |
269 | skb->pkt_type = PACKET_LOOPBACK; | |
270 | } else | |
271 | dev = phonet_route_output(net, daddr); | |
aa6c45f3 RDC |
272 | } else |
273 | dev = phonet_route_output(net, daddr); | |
274 | ||
107d0d9b RDC |
275 | if (!dev || !(dev->flags & IFF_UP)) |
276 | goto drop; | |
277 | ||
278 | saddr = phonet_address_get(dev, daddr); | |
279 | if (saddr == PN_NO_ADDR) | |
280 | goto drop; | |
281 | ||
107d0d9b RDC |
282 | if (!pn_addr(src)) |
283 | src = pn_object(saddr, pn_obj(src)); | |
284 | ||
a8059512 | 285 | err = pn_send(skb, dev, dst, src, res, 0); |
107d0d9b RDC |
286 | dev_put(dev); |
287 | return err; | |
288 | ||
289 | drop: | |
290 | kfree_skb(skb); | |
291 | if (dev) | |
292 | dev_put(dev); | |
293 | return err; | |
294 | } | |
295 | EXPORT_SYMBOL(pn_skb_send); | |
296 | ||
be0c52bf RDC |
297 | /* Do not send an error message in response to an error message */ |
298 | static inline int can_respond(struct sk_buff *skb) | |
299 | { | |
300 | const struct phonethdr *ph; | |
301 | const struct phonetmsg *pm; | |
302 | u8 submsg_id; | |
303 | ||
304 | if (!pskb_may_pull(skb, 3)) | |
305 | return 0; | |
306 | ||
307 | ph = pn_hdr(skb); | |
be0c52bf RDC |
308 | if (ph->pn_res == PN_PREFIX && !pskb_may_pull(skb, 5)) |
309 | return 0; | |
c3a90c78 RDC |
310 | if (ph->pn_res == PN_COMMGR) /* indications */ |
311 | return 0; | |
be0c52bf RDC |
312 | |
313 | ph = pn_hdr(skb); /* re-acquires the pointer */ | |
314 | pm = pn_msg(skb); | |
315 | if (pm->pn_msg_id != PN_COMMON_MESSAGE) | |
316 | return 1; | |
317 | submsg_id = (ph->pn_res == PN_PREFIX) | |
318 | ? pm->pn_e_submsg_id : pm->pn_submsg_id; | |
319 | if (submsg_id != PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP && | |
320 | pm->pn_e_submsg_id != PN_COMM_SERVICE_NOT_IDENTIFIED_RESP) | |
321 | return 1; | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static int send_obj_unreachable(struct sk_buff *rskb) | |
326 | { | |
327 | const struct phonethdr *oph = pn_hdr(rskb); | |
328 | const struct phonetmsg *opm = pn_msg(rskb); | |
329 | struct phonetmsg resp; | |
330 | ||
331 | memset(&resp, 0, sizeof(resp)); | |
332 | resp.pn_trans_id = opm->pn_trans_id; | |
333 | resp.pn_msg_id = PN_COMMON_MESSAGE; | |
334 | if (oph->pn_res == PN_PREFIX) { | |
335 | resp.pn_e_res_id = opm->pn_e_res_id; | |
336 | resp.pn_e_submsg_id = PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP; | |
337 | resp.pn_e_orig_msg_id = opm->pn_msg_id; | |
338 | resp.pn_e_status = 0; | |
339 | } else { | |
340 | resp.pn_submsg_id = PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP; | |
341 | resp.pn_orig_msg_id = opm->pn_msg_id; | |
342 | resp.pn_status = 0; | |
343 | } | |
344 | return pn_raw_send(&resp, sizeof(resp), rskb->dev, | |
345 | pn_object(oph->pn_sdev, oph->pn_sobj), | |
346 | pn_object(oph->pn_rdev, oph->pn_robj), | |
347 | oph->pn_res); | |
348 | } | |
349 | ||
350 | static int send_reset_indications(struct sk_buff *rskb) | |
351 | { | |
352 | struct phonethdr *oph = pn_hdr(rskb); | |
353 | static const u8 data[4] = { | |
354 | 0x00 /* trans ID */, 0x10 /* subscribe msg */, | |
355 | 0x00 /* subscription count */, 0x00 /* dummy */ | |
356 | }; | |
357 | ||
358 | return pn_raw_send(data, sizeof(data), rskb->dev, | |
359 | pn_object(oph->pn_sdev, 0x00), | |
c3a90c78 RDC |
360 | pn_object(oph->pn_rdev, oph->pn_robj), |
361 | PN_COMMGR); | |
be0c52bf RDC |
362 | } |
363 | ||
364 | ||
4b07b3f6 RDC |
365 | /* packet type functions */ |
366 | ||
367 | /* | |
368 | * Stuff received packets to associated sockets. | |
369 | * On error, returns non-zero and releases the skb. | |
370 | */ | |
371 | static int phonet_rcv(struct sk_buff *skb, struct net_device *dev, | |
372 | struct packet_type *pkttype, | |
373 | struct net_device *orig_dev) | |
374 | { | |
4b8f704b | 375 | struct net *net = dev_net(dev); |
4b07b3f6 RDC |
376 | struct phonethdr *ph; |
377 | struct sockaddr_pn sa; | |
378 | u16 len; | |
379 | ||
4b07b3f6 RDC |
380 | /* check we have at least a full Phonet header */ |
381 | if (!pskb_pull(skb, sizeof(struct phonethdr))) | |
382 | goto out; | |
383 | ||
384 | /* check that the advertised length is correct */ | |
385 | ph = pn_hdr(skb); | |
386 | len = get_unaligned_be16(&ph->pn_length); | |
387 | if (len < 2) | |
388 | goto out; | |
389 | len -= 2; | |
390 | if ((len > skb->len) || pskb_trim(skb, len)) | |
391 | goto out; | |
392 | skb_reset_transport_header(skb); | |
393 | ||
394 | pn_skb_get_dst_sockaddr(skb, &sa); | |
4b07b3f6 | 395 | |
f14001fc RDC |
396 | /* check if this is broadcasted */ |
397 | if (pn_sockaddr_get_addr(&sa) == PNADDR_BROADCAST) { | |
398 | pn_deliver_sock_broadcast(net, skb); | |
399 | goto out; | |
400 | } | |
401 | ||
b6a563b2 RDC |
402 | /* resource routing */ |
403 | if (pn_sockaddr_get_object(&sa) == 0) { | |
404 | struct sock *sk = pn_find_sock_by_res(net, sa.spn_resource); | |
405 | if (sk) | |
406 | return sk_receive_skb(sk, skb, 0); | |
407 | } | |
408 | ||
4b8f704b | 409 | /* check if we are the destination */ |
410 | if (phonet_address_lookup(net, pn_sockaddr_get_addr(&sa)) == 0) { | |
411 | /* Phonet packet input */ | |
412 | struct sock *sk = pn_find_sock_by_sa(net, &sa); | |
413 | ||
414 | if (sk) | |
415 | return sk_receive_skb(sk, skb, 0); | |
416 | ||
be0c52bf RDC |
417 | if (can_respond(skb)) { |
418 | send_obj_unreachable(skb); | |
419 | send_reset_indications(skb); | |
420 | } | |
86a0a1e5 RDC |
421 | } else if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) |
422 | goto out; /* Race between address deletion and loopback */ | |
423 | else { | |
424 | /* Phonet packet routing */ | |
425 | struct net_device *out_dev; | |
426 | ||
427 | out_dev = phonet_route_output(net, pn_sockaddr_get_addr(&sa)); | |
428 | if (!out_dev) { | |
ba7a46f1 JP |
429 | net_dbg_ratelimited("No Phonet route to %02X\n", |
430 | pn_sockaddr_get_addr(&sa)); | |
86a0a1e5 RDC |
431 | goto out; |
432 | } | |
433 | ||
434 | __skb_push(skb, sizeof(struct phonethdr)); | |
435 | skb->dev = out_dev; | |
436 | if (out_dev == dev) { | |
ba7a46f1 JP |
437 | net_dbg_ratelimited("Phonet loop to %02X on %s\n", |
438 | pn_sockaddr_get_addr(&sa), | |
439 | dev->name); | |
86a0a1e5 RDC |
440 | goto out_dev; |
441 | } | |
442 | /* Some drivers (e.g. TUN) do not allocate HW header space */ | |
443 | if (skb_cow_head(skb, out_dev->hard_header_len)) | |
444 | goto out_dev; | |
445 | ||
446 | if (dev_hard_header(skb, out_dev, ETH_P_PHONET, NULL, NULL, | |
447 | skb->len) < 0) | |
448 | goto out_dev; | |
449 | dev_queue_xmit(skb); | |
450 | dev_put(out_dev); | |
451 | return NET_RX_SUCCESS; | |
452 | out_dev: | |
453 | dev_put(out_dev); | |
be0c52bf | 454 | } |
ba113a94 | 455 | |
4b07b3f6 RDC |
456 | out: |
457 | kfree_skb(skb); | |
458 | return NET_RX_DROP; | |
459 | } | |
460 | ||
7546dd97 | 461 | static struct packet_type phonet_packet_type __read_mostly = { |
09640e63 | 462 | .type = cpu_to_be16(ETH_P_PHONET), |
4b07b3f6 RDC |
463 | .func = phonet_rcv, |
464 | }; | |
465 | ||
7ed0132f RDC |
466 | static DEFINE_MUTEX(proto_tab_lock); |
467 | ||
facb4edc | 468 | int __init_or_module phonet_proto_register(unsigned int protocol, |
4b07b3f6 RDC |
469 | struct phonet_protocol *pp) |
470 | { | |
471 | int err = 0; | |
472 | ||
473 | if (protocol >= PHONET_NPROTO) | |
474 | return -EINVAL; | |
475 | ||
476 | err = proto_register(pp->prot, 1); | |
477 | if (err) | |
478 | return err; | |
479 | ||
7ed0132f | 480 | mutex_lock(&proto_tab_lock); |
4b07b3f6 RDC |
481 | if (proto_tab[protocol]) |
482 | err = -EBUSY; | |
483 | else | |
cf778b00 | 484 | rcu_assign_pointer(proto_tab[protocol], pp); |
7ed0132f | 485 | mutex_unlock(&proto_tab_lock); |
4b07b3f6 RDC |
486 | |
487 | return err; | |
488 | } | |
489 | EXPORT_SYMBOL(phonet_proto_register); | |
490 | ||
facb4edc | 491 | void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp) |
4b07b3f6 | 492 | { |
7ed0132f | 493 | mutex_lock(&proto_tab_lock); |
4b07b3f6 | 494 | BUG_ON(proto_tab[protocol] != pp); |
a9b3cd7f | 495 | RCU_INIT_POINTER(proto_tab[protocol], NULL); |
7ed0132f RDC |
496 | mutex_unlock(&proto_tab_lock); |
497 | synchronize_rcu(); | |
4b07b3f6 RDC |
498 | proto_unregister(pp->prot); |
499 | } | |
500 | EXPORT_SYMBOL(phonet_proto_unregister); | |
501 | ||
4b07b3f6 RDC |
502 | /* Module registration */ |
503 | static int __init phonet_init(void) | |
504 | { | |
505 | int err; | |
506 | ||
76e02cf6 | 507 | err = phonet_device_init(); |
508 | if (err) | |
509 | return err; | |
510 | ||
6b0d07ba | 511 | pn_sock_init(); |
4b07b3f6 RDC |
512 | err = sock_register(&phonet_proto_family); |
513 | if (err) { | |
514 | printk(KERN_ALERT | |
515 | "phonet protocol family initialization failed\n"); | |
76e02cf6 | 516 | goto err_sock; |
4b07b3f6 RDC |
517 | } |
518 | ||
519 | dev_add_pack(&phonet_packet_type); | |
87ab4e20 | 520 | phonet_sysctl_init(); |
107d0d9b RDC |
521 | |
522 | err = isi_register(); | |
523 | if (err) | |
524 | goto err; | |
4b07b3f6 | 525 | return 0; |
107d0d9b RDC |
526 | |
527 | err: | |
87ab4e20 | 528 | phonet_sysctl_exit(); |
25532824 | 529 | sock_unregister(PF_PHONET); |
107d0d9b | 530 | dev_remove_pack(&phonet_packet_type); |
76e02cf6 | 531 | err_sock: |
107d0d9b RDC |
532 | phonet_device_exit(); |
533 | return err; | |
4b07b3f6 RDC |
534 | } |
535 | ||
536 | static void __exit phonet_exit(void) | |
537 | { | |
107d0d9b | 538 | isi_unregister(); |
87ab4e20 | 539 | phonet_sysctl_exit(); |
25532824 | 540 | sock_unregister(PF_PHONET); |
4b07b3f6 | 541 | dev_remove_pack(&phonet_packet_type); |
f8ff6028 | 542 | phonet_device_exit(); |
4b07b3f6 RDC |
543 | } |
544 | ||
545 | module_init(phonet_init); | |
546 | module_exit(phonet_exit); | |
547 | MODULE_DESCRIPTION("Phonet protocol stack for Linux"); | |
548 | MODULE_LICENSE("GPL"); | |
25532824 | 549 | MODULE_ALIAS_NETPROTO(PF_PHONET); |