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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * An implementation of the Acorn Econet and AUN protocols. | |
3 | * Philip Blundell <philb@gnu.org> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
9 | * | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/module.h> |
13 | ||
14 | #include <linux/types.h> | |
15 | #include <linux/kernel.h> | |
1da177e4 LT |
16 | #include <linux/string.h> |
17 | #include <linux/mm.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/sockios.h> | |
20 | #include <linux/in.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/if_ether.h> | |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/inetdevice.h> | |
26 | #include <linux/route.h> | |
27 | #include <linux/inet.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/if_arp.h> | |
30 | #include <linux/wireless.h> | |
31 | #include <linux/skbuff.h> | |
14c85021 | 32 | #include <linux/udp.h> |
1da177e4 LT |
33 | #include <net/sock.h> |
34 | #include <net/inet_common.h> | |
35 | #include <linux/stat.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/if_ec.h> | |
38 | #include <net/udp.h> | |
39 | #include <net/ip.h> | |
40 | #include <linux/spinlock.h> | |
41 | #include <linux/rcupdate.h> | |
42 | #include <linux/bitops.h> | |
1d181831 | 43 | #include <linux/mutex.h> |
1da177e4 LT |
44 | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/system.h> | |
47 | ||
90ddc4f0 | 48 | static const struct proto_ops econet_ops; |
1da177e4 LT |
49 | static struct hlist_head econet_sklist; |
50 | static DEFINE_RWLOCK(econet_lock); | |
1d181831 | 51 | static DEFINE_MUTEX(econet_mutex); |
1da177e4 LT |
52 | |
53 | /* Since there are only 256 possible network numbers (or fewer, depends | |
54 | how you count) it makes sense to use a simple lookup table. */ | |
55 | static struct net_device *net2dev_map[256]; | |
56 | ||
57 | #define EC_PORT_IP 0xd2 | |
58 | ||
59 | #ifdef CONFIG_ECONET_AUNUDP | |
ca403302 | 60 | static DEFINE_SPINLOCK(aun_queue_lock); |
1da177e4 LT |
61 | static struct socket *udpsock; |
62 | #define AUN_PORT 0x8000 | |
63 | ||
64 | ||
65 | struct aunhdr | |
66 | { | |
67 | unsigned char code; /* AUN magic protocol byte */ | |
68 | unsigned char port; | |
69 | unsigned char cb; | |
70 | unsigned char pad; | |
71 | unsigned long handle; | |
72 | }; | |
73 | ||
74 | static unsigned long aun_seq; | |
75 | ||
76 | /* Queue of packets waiting to be transmitted. */ | |
77 | static struct sk_buff_head aun_queue; | |
78 | static struct timer_list ab_cleanup_timer; | |
79 | ||
80 | #endif /* CONFIG_ECONET_AUNUDP */ | |
81 | ||
82 | /* Per-packet information */ | |
83 | struct ec_cb | |
84 | { | |
85 | struct sockaddr_ec sec; | |
86 | unsigned long cookie; /* Supplied by user. */ | |
87 | #ifdef CONFIG_ECONET_AUNUDP | |
88 | int done; | |
89 | unsigned long seq; /* Sequencing */ | |
90 | unsigned long timeout; /* Timeout */ | |
91 | unsigned long start; /* jiffies */ | |
92 | #endif | |
93 | #ifdef CONFIG_ECONET_NATIVE | |
94 | void (*sent)(struct sk_buff *, int result); | |
95 | #endif | |
96 | }; | |
97 | ||
98 | static void econet_remove_socket(struct hlist_head *list, struct sock *sk) | |
99 | { | |
100 | write_lock_bh(&econet_lock); | |
101 | sk_del_node_init(sk); | |
102 | write_unlock_bh(&econet_lock); | |
103 | } | |
104 | ||
105 | static void econet_insert_socket(struct hlist_head *list, struct sock *sk) | |
106 | { | |
107 | write_lock_bh(&econet_lock); | |
108 | sk_add_node(sk, list); | |
109 | write_unlock_bh(&econet_lock); | |
110 | } | |
111 | ||
112 | /* | |
113 | * Pull a packet from our receive queue and hand it to the user. | |
114 | * If necessary we block. | |
115 | */ | |
116 | ||
117 | static int econet_recvmsg(struct kiocb *iocb, struct socket *sock, | |
118 | struct msghdr *msg, size_t len, int flags) | |
119 | { | |
120 | struct sock *sk = sock->sk; | |
121 | struct sk_buff *skb; | |
122 | size_t copied; | |
123 | int err; | |
124 | ||
125 | msg->msg_namelen = sizeof(struct sockaddr_ec); | |
126 | ||
1d181831 DM |
127 | mutex_lock(&econet_mutex); |
128 | ||
1da177e4 LT |
129 | /* |
130 | * Call the generic datagram receiver. This handles all sorts | |
131 | * of horrible races and re-entrancy so we can forget about it | |
132 | * in the protocol layers. | |
133 | * | |
134 | * Now it will return ENETDOWN, if device have just gone down, | |
135 | * but then it will block. | |
136 | */ | |
137 | ||
138 | skb=skb_recv_datagram(sk,flags,flags&MSG_DONTWAIT,&err); | |
139 | ||
140 | /* | |
c9b6aab9 | 141 | * An error occurred so return it. Because skb_recv_datagram() |
1da177e4 LT |
142 | * handles the blocking we don't see and worry about blocking |
143 | * retries. | |
144 | */ | |
145 | ||
146 | if(skb==NULL) | |
147 | goto out; | |
148 | ||
149 | /* | |
150 | * You lose any data beyond the buffer you gave. If it worries a | |
151 | * user program they can ask the device for its MTU anyway. | |
152 | */ | |
153 | ||
154 | copied = skb->len; | |
155 | if (copied > len) | |
156 | { | |
157 | copied=len; | |
158 | msg->msg_flags|=MSG_TRUNC; | |
159 | } | |
160 | ||
161 | /* We can't use skb_copy_datagram here */ | |
162 | err = memcpy_toiovec(msg->msg_iov, skb->data, copied); | |
163 | if (err) | |
164 | goto out_free; | |
b7aa0bf7 | 165 | sk->sk_stamp = skb->tstamp; |
1da177e4 LT |
166 | |
167 | if (msg->msg_name) | |
168 | memcpy(msg->msg_name, skb->cb, msg->msg_namelen); | |
169 | ||
170 | /* | |
171 | * Free or return the buffer as appropriate. Again this | |
172 | * hides all the races and re-entrancy issues from us. | |
173 | */ | |
174 | err = copied; | |
175 | ||
176 | out_free: | |
177 | skb_free_datagram(sk, skb); | |
178 | out: | |
1d181831 | 179 | mutex_unlock(&econet_mutex); |
1da177e4 LT |
180 | return err; |
181 | } | |
182 | ||
183 | /* | |
184 | * Bind an Econet socket. | |
185 | */ | |
186 | ||
187 | static int econet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
188 | { | |
189 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; | |
1d181831 DM |
190 | struct sock *sk; |
191 | struct econet_sock *eo; | |
c9b6aab9 | 192 | |
1da177e4 LT |
193 | /* |
194 | * Check legality | |
195 | */ | |
c9b6aab9 | 196 | |
1da177e4 LT |
197 | if (addr_len < sizeof(struct sockaddr_ec) || |
198 | sec->sec_family != AF_ECONET) | |
199 | return -EINVAL; | |
c9b6aab9 | 200 | |
1d181831 DM |
201 | mutex_lock(&econet_mutex); |
202 | ||
203 | sk = sock->sk; | |
204 | eo = ec_sk(sk); | |
205 | ||
1da177e4 LT |
206 | eo->cb = sec->cb; |
207 | eo->port = sec->port; | |
208 | eo->station = sec->addr.station; | |
209 | eo->net = sec->addr.net; | |
210 | ||
1d181831 DM |
211 | mutex_unlock(&econet_mutex); |
212 | ||
1da177e4 LT |
213 | return 0; |
214 | } | |
215 | ||
216 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
217 | /* | |
218 | * Queue a transmit result for the user to be told about. | |
219 | */ | |
220 | ||
221 | static void tx_result(struct sock *sk, unsigned long cookie, int result) | |
222 | { | |
223 | struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC); | |
224 | struct ec_cb *eb; | |
225 | struct sockaddr_ec *sec; | |
226 | ||
227 | if (skb == NULL) | |
228 | { | |
229 | printk(KERN_DEBUG "ec: memory squeeze, transmit result dropped.\n"); | |
230 | return; | |
231 | } | |
232 | ||
233 | eb = (struct ec_cb *)&skb->cb; | |
234 | sec = (struct sockaddr_ec *)&eb->sec; | |
235 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
236 | sec->cookie = cookie; | |
237 | sec->type = ECTYPE_TRANSMIT_STATUS | result; | |
238 | sec->sec_family = AF_ECONET; | |
239 | ||
240 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
241 | kfree_skb(skb); | |
242 | } | |
243 | #endif | |
244 | ||
245 | #ifdef CONFIG_ECONET_NATIVE | |
246 | /* | |
247 | * Called by the Econet hardware driver when a packet transmit | |
248 | * has completed. Tell the user. | |
249 | */ | |
250 | ||
251 | static void ec_tx_done(struct sk_buff *skb, int result) | |
252 | { | |
253 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
254 | tx_result(skb->sk, eb->cookie, result); | |
255 | } | |
256 | #endif | |
257 | ||
258 | /* | |
259 | * Send a packet. We have to work out which device it's going out on | |
260 | * and hence whether to use real Econet or the UDP emulation. | |
261 | */ | |
262 | ||
263 | static int econet_sendmsg(struct kiocb *iocb, struct socket *sock, | |
264 | struct msghdr *msg, size_t len) | |
265 | { | |
266 | struct sock *sk = sock->sk; | |
267 | struct sockaddr_ec *saddr=(struct sockaddr_ec *)msg->msg_name; | |
268 | struct net_device *dev; | |
269 | struct ec_addr addr; | |
270 | int err; | |
271 | unsigned char port, cb; | |
272 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
273 | struct sk_buff *skb; | |
274 | struct ec_cb *eb; | |
275 | #endif | |
276 | #ifdef CONFIG_ECONET_AUNUDP | |
277 | struct msghdr udpmsg; | |
278 | struct iovec iov[msg->msg_iovlen+1]; | |
279 | struct aunhdr ah; | |
280 | struct sockaddr_in udpdest; | |
281 | __kernel_size_t size; | |
282 | int i; | |
283 | mm_segment_t oldfs; | |
284 | #endif | |
c9b6aab9 | 285 | |
1da177e4 | 286 | /* |
c9b6aab9 | 287 | * Check the flags. |
1da177e4 LT |
288 | */ |
289 | ||
c9b6aab9 | 290 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) |
1da177e4 LT |
291 | return -EINVAL; |
292 | ||
293 | /* | |
c9b6aab9 | 294 | * Get and verify the address. |
1da177e4 | 295 | */ |
c9b6aab9 | 296 | |
1d181831 DM |
297 | mutex_lock(&econet_mutex); |
298 | ||
1da177e4 LT |
299 | if (saddr == NULL) { |
300 | struct econet_sock *eo = ec_sk(sk); | |
301 | ||
302 | addr.station = eo->station; | |
303 | addr.net = eo->net; | |
304 | port = eo->port; | |
305 | cb = eo->cb; | |
306 | } else { | |
1d181831 DM |
307 | if (msg->msg_namelen < sizeof(struct sockaddr_ec)) { |
308 | mutex_unlock(&econet_mutex); | |
1da177e4 | 309 | return -EINVAL; |
1d181831 | 310 | } |
1da177e4 LT |
311 | addr.station = saddr->addr.station; |
312 | addr.net = saddr->addr.net; | |
313 | port = saddr->port; | |
314 | cb = saddr->cb; | |
315 | } | |
316 | ||
317 | /* Look for a device with the right network number. */ | |
318 | dev = net2dev_map[addr.net]; | |
319 | ||
320 | /* If not directly reachable, use some default */ | |
1d181831 | 321 | if (dev == NULL) { |
1da177e4 LT |
322 | dev = net2dev_map[0]; |
323 | /* No interfaces at all? */ | |
1d181831 DM |
324 | if (dev == NULL) { |
325 | mutex_unlock(&econet_mutex); | |
1da177e4 | 326 | return -ENETDOWN; |
1d181831 | 327 | } |
1da177e4 LT |
328 | } |
329 | ||
1d181831 DM |
330 | if (len + 15 > dev->mtu) { |
331 | mutex_unlock(&econet_mutex); | |
1da177e4 | 332 | return -EMSGSIZE; |
1d181831 | 333 | } |
1da177e4 | 334 | |
1d181831 | 335 | if (dev->type == ARPHRD_ECONET) { |
1da177e4 LT |
336 | /* Real hardware Econet. We're not worthy etc. */ |
337 | #ifdef CONFIG_ECONET_NATIVE | |
338 | unsigned short proto = 0; | |
339 | ||
340 | dev_hold(dev); | |
c9b6aab9 YH |
341 | |
342 | skb = sock_alloc_send_skb(sk, len+LL_RESERVED_SPACE(dev), | |
1da177e4 LT |
343 | msg->msg_flags & MSG_DONTWAIT, &err); |
344 | if (skb==NULL) | |
345 | goto out_unlock; | |
c9b6aab9 | 346 | |
1da177e4 LT |
347 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
348 | skb->nh.raw = skb->data; | |
c9b6aab9 | 349 | |
1da177e4 | 350 | eb = (struct ec_cb *)&skb->cb; |
c9b6aab9 | 351 | |
1da177e4 LT |
352 | /* BUG: saddr may be NULL */ |
353 | eb->cookie = saddr->cookie; | |
354 | eb->sec = *saddr; | |
355 | eb->sent = ec_tx_done; | |
356 | ||
357 | if (dev->hard_header) { | |
358 | int res; | |
359 | struct ec_framehdr *fh; | |
360 | err = -EINVAL; | |
c9b6aab9 | 361 | res = dev->hard_header(skb, dev, ntohs(proto), |
1da177e4 LT |
362 | &addr, NULL, len); |
363 | /* Poke in our control byte and | |
364 | port number. Hack, hack. */ | |
365 | fh = (struct ec_framehdr *)(skb->data); | |
366 | fh->cb = cb; | |
367 | fh->port = port; | |
368 | if (sock->type != SOCK_DGRAM) { | |
369 | skb->tail = skb->data; | |
370 | skb->len = 0; | |
371 | } else if (res < 0) | |
372 | goto out_free; | |
373 | } | |
c9b6aab9 | 374 | |
1da177e4 LT |
375 | /* Copy the data. Returns -EFAULT on error */ |
376 | err = memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len); | |
377 | skb->protocol = proto; | |
378 | skb->dev = dev; | |
379 | skb->priority = sk->sk_priority; | |
380 | if (err) | |
381 | goto out_free; | |
c9b6aab9 | 382 | |
1da177e4 LT |
383 | err = -ENETDOWN; |
384 | if (!(dev->flags & IFF_UP)) | |
385 | goto out_free; | |
c9b6aab9 | 386 | |
1da177e4 LT |
387 | /* |
388 | * Now send it | |
389 | */ | |
c9b6aab9 | 390 | |
1da177e4 LT |
391 | dev_queue_xmit(skb); |
392 | dev_put(dev); | |
1d181831 | 393 | mutex_unlock(&econet_mutex); |
1da177e4 LT |
394 | return(len); |
395 | ||
396 | out_free: | |
397 | kfree_skb(skb); | |
398 | out_unlock: | |
399 | if (dev) | |
400 | dev_put(dev); | |
401 | #else | |
402 | err = -EPROTOTYPE; | |
403 | #endif | |
1d181831 DM |
404 | mutex_unlock(&econet_mutex); |
405 | ||
1da177e4 LT |
406 | return err; |
407 | } | |
408 | ||
409 | #ifdef CONFIG_ECONET_AUNUDP | |
410 | /* AUN virtual Econet. */ | |
411 | ||
1d181831 DM |
412 | if (udpsock == NULL) { |
413 | mutex_unlock(&econet_mutex); | |
1da177e4 | 414 | return -ENETDOWN; /* No socket - can't send */ |
1d181831 | 415 | } |
c9b6aab9 | 416 | |
1da177e4 LT |
417 | /* Make up a UDP datagram and hand it off to some higher intellect. */ |
418 | ||
419 | memset(&udpdest, 0, sizeof(udpdest)); | |
420 | udpdest.sin_family = AF_INET; | |
421 | udpdest.sin_port = htons(AUN_PORT); | |
422 | ||
423 | /* At the moment we use the stupid Acorn scheme of Econet address | |
424 | y.x maps to IP a.b.c.x. This should be replaced with something | |
425 | more flexible and more aware of subnet masks. */ | |
426 | { | |
427 | struct in_device *idev; | |
428 | unsigned long network = 0; | |
429 | ||
430 | rcu_read_lock(); | |
e5ed6399 | 431 | idev = __in_dev_get_rcu(dev); |
1da177e4 LT |
432 | if (idev) { |
433 | if (idev->ifa_list) | |
c9b6aab9 | 434 | network = ntohl(idev->ifa_list->ifa_address) & |
1da177e4 LT |
435 | 0xffffff00; /* !!! */ |
436 | } | |
437 | rcu_read_unlock(); | |
438 | udpdest.sin_addr.s_addr = htonl(network | addr.station); | |
439 | } | |
440 | ||
441 | ah.port = port; | |
442 | ah.cb = cb & 0x7f; | |
443 | ah.code = 2; /* magic */ | |
444 | ah.pad = 0; | |
445 | ||
446 | /* tack our header on the front of the iovec */ | |
447 | size = sizeof(struct aunhdr); | |
448 | /* | |
449 | * XXX: that is b0rken. We can't mix userland and kernel pointers | |
450 | * in iovec, since on a lot of platforms copy_from_user() will | |
451 | * *not* work with the kernel and userland ones at the same time, | |
452 | * regardless of what we do with set_fs(). And we are talking about | |
453 | * econet-over-ethernet here, so "it's only ARM anyway" doesn't | |
454 | * apply. Any suggestions on fixing that code? -- AV | |
455 | */ | |
456 | iov[0].iov_base = (void *)&ah; | |
457 | iov[0].iov_len = size; | |
458 | for (i = 0; i < msg->msg_iovlen; i++) { | |
459 | void __user *base = msg->msg_iov[i].iov_base; | |
460 | size_t len = msg->msg_iov[i].iov_len; | |
461 | /* Check it now since we switch to KERNEL_DS later. */ | |
1d181831 DM |
462 | if (!access_ok(VERIFY_READ, base, len)) { |
463 | mutex_unlock(&econet_mutex); | |
1da177e4 | 464 | return -EFAULT; |
1d181831 | 465 | } |
1da177e4 LT |
466 | iov[i+1].iov_base = base; |
467 | iov[i+1].iov_len = len; | |
468 | size += len; | |
469 | } | |
470 | ||
471 | /* Get a skbuff (no data, just holds our cb information) */ | |
c9b6aab9 | 472 | if ((skb = sock_alloc_send_skb(sk, 0, |
1d181831 DM |
473 | msg->msg_flags & MSG_DONTWAIT, |
474 | &err)) == NULL) { | |
475 | mutex_unlock(&econet_mutex); | |
1da177e4 | 476 | return err; |
1d181831 | 477 | } |
1da177e4 LT |
478 | |
479 | eb = (struct ec_cb *)&skb->cb; | |
480 | ||
481 | eb->cookie = saddr->cookie; | |
482 | eb->timeout = (5*HZ); | |
483 | eb->start = jiffies; | |
484 | ah.handle = aun_seq; | |
485 | eb->seq = (aun_seq++); | |
486 | eb->sec = *saddr; | |
487 | ||
488 | skb_queue_tail(&aun_queue, skb); | |
489 | ||
490 | udpmsg.msg_name = (void *)&udpdest; | |
491 | udpmsg.msg_namelen = sizeof(udpdest); | |
492 | udpmsg.msg_iov = &iov[0]; | |
493 | udpmsg.msg_iovlen = msg->msg_iovlen + 1; | |
494 | udpmsg.msg_control = NULL; | |
495 | udpmsg.msg_controllen = 0; | |
496 | udpmsg.msg_flags=0; | |
497 | ||
498 | oldfs = get_fs(); set_fs(KERNEL_DS); /* More privs :-) */ | |
499 | err = sock_sendmsg(udpsock, &udpmsg, size); | |
500 | set_fs(oldfs); | |
501 | #else | |
502 | err = -EPROTOTYPE; | |
503 | #endif | |
1d181831 DM |
504 | mutex_unlock(&econet_mutex); |
505 | ||
1da177e4 LT |
506 | return err; |
507 | } | |
508 | ||
509 | /* | |
510 | * Look up the address of a socket. | |
511 | */ | |
512 | ||
513 | static int econet_getname(struct socket *sock, struct sockaddr *uaddr, | |
514 | int *uaddr_len, int peer) | |
515 | { | |
1d181831 DM |
516 | struct sock *sk; |
517 | struct econet_sock *eo; | |
1da177e4 LT |
518 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; |
519 | ||
520 | if (peer) | |
521 | return -EOPNOTSUPP; | |
522 | ||
1d181831 DM |
523 | mutex_lock(&econet_mutex); |
524 | ||
525 | sk = sock->sk; | |
526 | eo = ec_sk(sk); | |
527 | ||
1da177e4 LT |
528 | sec->sec_family = AF_ECONET; |
529 | sec->port = eo->port; | |
530 | sec->addr.station = eo->station; | |
531 | sec->addr.net = eo->net; | |
532 | ||
1d181831 DM |
533 | mutex_unlock(&econet_mutex); |
534 | ||
1da177e4 LT |
535 | *uaddr_len = sizeof(*sec); |
536 | return 0; | |
537 | } | |
538 | ||
539 | static void econet_destroy_timer(unsigned long data) | |
540 | { | |
541 | struct sock *sk=(struct sock *)data; | |
542 | ||
543 | if (!atomic_read(&sk->sk_wmem_alloc) && | |
544 | !atomic_read(&sk->sk_rmem_alloc)) { | |
545 | sk_free(sk); | |
546 | return; | |
547 | } | |
548 | ||
549 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
550 | add_timer(&sk->sk_timer); | |
551 | printk(KERN_DEBUG "econet socket destroy delayed\n"); | |
552 | } | |
553 | ||
554 | /* | |
555 | * Close an econet socket. | |
556 | */ | |
557 | ||
558 | static int econet_release(struct socket *sock) | |
559 | { | |
1d181831 | 560 | struct sock *sk; |
1da177e4 | 561 | |
1d181831 DM |
562 | mutex_lock(&econet_mutex); |
563 | ||
564 | sk = sock->sk; | |
1da177e4 | 565 | if (!sk) |
1d181831 | 566 | goto out_unlock; |
1da177e4 LT |
567 | |
568 | econet_remove_socket(&econet_sklist, sk); | |
569 | ||
570 | /* | |
571 | * Now the socket is dead. No more input will appear. | |
572 | */ | |
573 | ||
574 | sk->sk_state_change(sk); /* It is useless. Just for sanity. */ | |
575 | ||
576 | sock->sk = NULL; | |
577 | sk->sk_socket = NULL; | |
578 | sock_set_flag(sk, SOCK_DEAD); | |
579 | ||
580 | /* Purge queues */ | |
581 | ||
582 | skb_queue_purge(&sk->sk_receive_queue); | |
583 | ||
584 | if (atomic_read(&sk->sk_rmem_alloc) || | |
585 | atomic_read(&sk->sk_wmem_alloc)) { | |
586 | sk->sk_timer.data = (unsigned long)sk; | |
587 | sk->sk_timer.expires = jiffies + HZ; | |
588 | sk->sk_timer.function = econet_destroy_timer; | |
589 | add_timer(&sk->sk_timer); | |
1d181831 DM |
590 | |
591 | goto out_unlock; | |
1da177e4 LT |
592 | } |
593 | ||
594 | sk_free(sk); | |
1d181831 DM |
595 | |
596 | out_unlock: | |
597 | mutex_unlock(&econet_mutex); | |
1da177e4 LT |
598 | return 0; |
599 | } | |
600 | ||
601 | static struct proto econet_proto = { | |
602 | .name = "ECONET", | |
603 | .owner = THIS_MODULE, | |
604 | .obj_size = sizeof(struct econet_sock), | |
605 | }; | |
606 | ||
607 | /* | |
608 | * Create an Econet socket | |
609 | */ | |
610 | ||
611 | static int econet_create(struct socket *sock, int protocol) | |
612 | { | |
613 | struct sock *sk; | |
614 | struct econet_sock *eo; | |
615 | int err; | |
616 | ||
617 | /* Econet only provides datagram services. */ | |
618 | if (sock->type != SOCK_DGRAM) | |
619 | return -ESOCKTNOSUPPORT; | |
620 | ||
621 | sock->state = SS_UNCONNECTED; | |
622 | ||
623 | err = -ENOBUFS; | |
624 | sk = sk_alloc(PF_ECONET, GFP_KERNEL, &econet_proto, 1); | |
625 | if (sk == NULL) | |
626 | goto out; | |
627 | ||
628 | sk->sk_reuse = 1; | |
629 | sock->ops = &econet_ops; | |
630 | sock_init_data(sock, sk); | |
631 | ||
632 | eo = ec_sk(sk); | |
633 | sock_reset_flag(sk, SOCK_ZAPPED); | |
634 | sk->sk_family = PF_ECONET; | |
635 | eo->num = protocol; | |
636 | ||
637 | econet_insert_socket(&econet_sklist, sk); | |
638 | return(0); | |
639 | out: | |
640 | return err; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Handle Econet specific ioctls | |
645 | */ | |
646 | ||
647 | static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg) | |
648 | { | |
649 | struct ifreq ifr; | |
650 | struct ec_device *edev; | |
651 | struct net_device *dev; | |
652 | struct sockaddr_ec *sec; | |
1d181831 | 653 | int err; |
1da177e4 LT |
654 | |
655 | /* | |
656 | * Fetch the caller's info block into kernel space | |
657 | */ | |
658 | ||
659 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
660 | return -EFAULT; | |
661 | ||
c9b6aab9 | 662 | if ((dev = dev_get_by_name(ifr.ifr_name)) == NULL) |
1da177e4 LT |
663 | return -ENODEV; |
664 | ||
665 | sec = (struct sockaddr_ec *)&ifr.ifr_addr; | |
666 | ||
1d181831 DM |
667 | mutex_lock(&econet_mutex); |
668 | ||
669 | err = 0; | |
670 | switch (cmd) { | |
1da177e4 LT |
671 | case SIOCSIFADDR: |
672 | edev = dev->ec_ptr; | |
1d181831 | 673 | if (edev == NULL) { |
1da177e4 | 674 | /* Magic up a new one. */ |
0da974f4 | 675 | edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL); |
1da177e4 | 676 | if (edev == NULL) { |
1d181831 DM |
677 | err = -ENOMEM; |
678 | break; | |
1da177e4 | 679 | } |
1da177e4 | 680 | dev->ec_ptr = edev; |
1d181831 | 681 | } else |
1da177e4 LT |
682 | net2dev_map[edev->net] = NULL; |
683 | edev->station = sec->addr.station; | |
684 | edev->net = sec->addr.net; | |
685 | net2dev_map[sec->addr.net] = dev; | |
686 | if (!net2dev_map[0]) | |
687 | net2dev_map[0] = dev; | |
1d181831 | 688 | break; |
1da177e4 LT |
689 | |
690 | case SIOCGIFADDR: | |
691 | edev = dev->ec_ptr; | |
1d181831 DM |
692 | if (edev == NULL) { |
693 | err = -ENODEV; | |
694 | break; | |
1da177e4 LT |
695 | } |
696 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
697 | sec->addr.station = edev->station; | |
698 | sec->addr.net = edev->net; | |
699 | sec->sec_family = AF_ECONET; | |
700 | dev_put(dev); | |
701 | if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
1d181831 DM |
702 | err = -EFAULT; |
703 | break; | |
704 | ||
705 | default: | |
706 | err = -EINVAL; | |
707 | break; | |
1da177e4 LT |
708 | } |
709 | ||
1d181831 DM |
710 | mutex_unlock(&econet_mutex); |
711 | ||
1da177e4 | 712 | dev_put(dev); |
1d181831 DM |
713 | |
714 | return err; | |
1da177e4 LT |
715 | } |
716 | ||
717 | /* | |
718 | * Handle generic ioctls | |
719 | */ | |
720 | ||
721 | static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
722 | { | |
723 | struct sock *sk = sock->sk; | |
724 | void __user *argp = (void __user *)arg; | |
725 | ||
726 | switch(cmd) { | |
727 | case SIOCGSTAMP: | |
728 | return sock_get_timestamp(sk, argp); | |
729 | ||
730 | case SIOCSIFADDR: | |
731 | case SIOCGIFADDR: | |
732 | return ec_dev_ioctl(sock, cmd, argp); | |
733 | break; | |
734 | ||
735 | default: | |
b5e5fa5e | 736 | return -ENOIOCTLCMD; |
1da177e4 LT |
737 | } |
738 | /*NOTREACHED*/ | |
739 | return 0; | |
740 | } | |
741 | ||
742 | static struct net_proto_family econet_family_ops = { | |
743 | .family = PF_ECONET, | |
744 | .create = econet_create, | |
745 | .owner = THIS_MODULE, | |
746 | }; | |
747 | ||
1d181831 | 748 | static const struct proto_ops econet_ops = { |
1da177e4 LT |
749 | .family = PF_ECONET, |
750 | .owner = THIS_MODULE, | |
751 | .release = econet_release, | |
752 | .bind = econet_bind, | |
753 | .connect = sock_no_connect, | |
754 | .socketpair = sock_no_socketpair, | |
755 | .accept = sock_no_accept, | |
c9b6aab9 | 756 | .getname = econet_getname, |
1da177e4 LT |
757 | .poll = datagram_poll, |
758 | .ioctl = econet_ioctl, | |
759 | .listen = sock_no_listen, | |
760 | .shutdown = sock_no_shutdown, | |
761 | .setsockopt = sock_no_setsockopt, | |
762 | .getsockopt = sock_no_getsockopt, | |
763 | .sendmsg = econet_sendmsg, | |
764 | .recvmsg = econet_recvmsg, | |
765 | .mmap = sock_no_mmap, | |
766 | .sendpage = sock_no_sendpage, | |
767 | }; | |
768 | ||
1da177e4 LT |
769 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) |
770 | /* | |
771 | * Find the listening socket, if any, for the given data. | |
772 | */ | |
773 | ||
774 | static struct sock *ec_listening_socket(unsigned char port, unsigned char | |
775 | station, unsigned char net) | |
776 | { | |
777 | struct sock *sk; | |
778 | struct hlist_node *node; | |
779 | ||
780 | sk_for_each(sk, node, &econet_sklist) { | |
781 | struct econet_sock *opt = ec_sk(sk); | |
c9b6aab9 | 782 | if ((opt->port == port || opt->port == 0) && |
1da177e4 LT |
783 | (opt->station == station || opt->station == 0) && |
784 | (opt->net == net || opt->net == 0)) | |
785 | goto found; | |
786 | } | |
787 | sk = NULL; | |
788 | found: | |
789 | return sk; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Queue a received packet for a socket. | |
794 | */ | |
795 | ||
796 | static int ec_queue_packet(struct sock *sk, struct sk_buff *skb, | |
797 | unsigned char stn, unsigned char net, | |
798 | unsigned char cb, unsigned char port) | |
799 | { | |
800 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
801 | struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec; | |
802 | ||
803 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
804 | sec->sec_family = AF_ECONET; | |
805 | sec->type = ECTYPE_PACKET_RECEIVED; | |
806 | sec->port = port; | |
807 | sec->cb = cb; | |
808 | sec->addr.net = net; | |
809 | sec->addr.station = stn; | |
810 | ||
811 | return sock_queue_rcv_skb(sk, skb); | |
812 | } | |
813 | #endif | |
814 | ||
815 | #ifdef CONFIG_ECONET_AUNUDP | |
816 | /* | |
c9b6aab9 | 817 | * Send an AUN protocol response. |
1da177e4 LT |
818 | */ |
819 | ||
820 | static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb) | |
821 | { | |
822 | struct sockaddr_in sin = { | |
823 | .sin_family = AF_INET, | |
824 | .sin_port = htons(AUN_PORT), | |
825 | .sin_addr = {.s_addr = addr} | |
826 | }; | |
827 | struct aunhdr ah = {.code = code, .cb = cb, .handle = seq}; | |
828 | struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)}; | |
829 | struct msghdr udpmsg; | |
c9b6aab9 | 830 | |
1da177e4 LT |
831 | udpmsg.msg_name = (void *)&sin; |
832 | udpmsg.msg_namelen = sizeof(sin); | |
833 | udpmsg.msg_control = NULL; | |
834 | udpmsg.msg_controllen = 0; | |
835 | udpmsg.msg_flags=0; | |
836 | ||
837 | kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah)); | |
838 | } | |
839 | ||
840 | ||
841 | /* | |
842 | * Handle incoming AUN packets. Work out if anybody wants them, | |
843 | * and send positive or negative acknowledgements as appropriate. | |
844 | */ | |
845 | ||
846 | static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len) | |
847 | { | |
848 | struct iphdr *ip = skb->nh.iph; | |
849 | unsigned char stn = ntohl(ip->saddr) & 0xff; | |
850 | struct sock *sk; | |
851 | struct sk_buff *newskb; | |
852 | struct ec_device *edev = skb->dev->ec_ptr; | |
853 | ||
854 | if (! edev) | |
855 | goto bad; | |
856 | ||
857 | if ((sk = ec_listening_socket(ah->port, stn, edev->net)) == NULL) | |
858 | goto bad; /* Nobody wants it */ | |
859 | ||
c9b6aab9 | 860 | newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15, |
1da177e4 LT |
861 | GFP_ATOMIC); |
862 | if (newskb == NULL) | |
863 | { | |
864 | printk(KERN_DEBUG "AUN: memory squeeze, dropping packet.\n"); | |
865 | /* Send nack and hope sender tries again */ | |
866 | goto bad; | |
867 | } | |
868 | ||
c9b6aab9 | 869 | memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah+1), |
1da177e4 LT |
870 | len - sizeof(struct aunhdr)); |
871 | ||
872 | if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port)) | |
873 | { | |
874 | /* Socket is bankrupt. */ | |
875 | kfree_skb(newskb); | |
876 | goto bad; | |
877 | } | |
878 | ||
879 | aun_send_response(ip->saddr, ah->handle, 3, 0); | |
880 | return; | |
881 | ||
882 | bad: | |
883 | aun_send_response(ip->saddr, ah->handle, 4, 0); | |
884 | } | |
885 | ||
886 | /* | |
887 | * Handle incoming AUN transmit acknowledgements. If the sequence | |
888 | * number matches something in our backlog then kill it and tell | |
889 | * the user. If the remote took too long to reply then we may have | |
890 | * dropped the packet already. | |
891 | */ | |
892 | ||
893 | static void aun_tx_ack(unsigned long seq, int result) | |
894 | { | |
895 | struct sk_buff *skb; | |
896 | unsigned long flags; | |
897 | struct ec_cb *eb; | |
898 | ||
899 | spin_lock_irqsave(&aun_queue_lock, flags); | |
900 | skb = skb_peek(&aun_queue); | |
901 | while (skb && skb != (struct sk_buff *)&aun_queue) | |
902 | { | |
903 | struct sk_buff *newskb = skb->next; | |
904 | eb = (struct ec_cb *)&skb->cb; | |
905 | if (eb->seq == seq) | |
906 | goto foundit; | |
907 | ||
908 | skb = newskb; | |
909 | } | |
910 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
911 | printk(KERN_DEBUG "AUN: unknown sequence %ld\n", seq); | |
912 | return; | |
913 | ||
914 | foundit: | |
915 | tx_result(skb->sk, eb->cookie, result); | |
8728b834 | 916 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
917 | spin_unlock_irqrestore(&aun_queue_lock, flags); |
918 | kfree_skb(skb); | |
919 | } | |
920 | ||
921 | /* | |
922 | * Deal with received AUN frames - sort out what type of thing it is | |
923 | * and hand it to the right function. | |
924 | */ | |
925 | ||
926 | static void aun_data_available(struct sock *sk, int slen) | |
927 | { | |
928 | int err; | |
929 | struct sk_buff *skb; | |
930 | unsigned char *data; | |
931 | struct aunhdr *ah; | |
932 | struct iphdr *ip; | |
933 | size_t len; | |
934 | ||
935 | while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) { | |
936 | if (err == -EAGAIN) { | |
937 | printk(KERN_ERR "AUN: no data available?!"); | |
938 | return; | |
939 | } | |
940 | printk(KERN_DEBUG "AUN: recvfrom() error %d\n", -err); | |
941 | } | |
942 | ||
943 | data = skb->h.raw + sizeof(struct udphdr); | |
944 | ah = (struct aunhdr *)data; | |
945 | len = skb->len - sizeof(struct udphdr); | |
946 | ip = skb->nh.iph; | |
947 | ||
948 | switch (ah->code) | |
949 | { | |
950 | case 2: | |
951 | aun_incoming(skb, ah, len); | |
952 | break; | |
953 | case 3: | |
954 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK); | |
955 | break; | |
956 | case 4: | |
957 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING); | |
958 | break; | |
959 | #if 0 | |
960 | /* This isn't quite right yet. */ | |
961 | case 5: | |
962 | aun_send_response(ip->saddr, ah->handle, 6, ah->cb); | |
963 | break; | |
964 | #endif | |
965 | default: | |
966 | printk(KERN_DEBUG "unknown AUN packet (type %d)\n", data[0]); | |
967 | } | |
968 | ||
969 | skb_free_datagram(sk, skb); | |
970 | } | |
971 | ||
972 | /* | |
973 | * Called by the timer to manage the AUN transmit queue. If a packet | |
974 | * was sent to a dead or nonexistent host then we will never get an | |
975 | * acknowledgement back. After a few seconds we need to spot this and | |
976 | * drop the packet. | |
977 | */ | |
978 | ||
979 | static void ab_cleanup(unsigned long h) | |
980 | { | |
981 | struct sk_buff *skb; | |
982 | unsigned long flags; | |
983 | ||
984 | spin_lock_irqsave(&aun_queue_lock, flags); | |
985 | skb = skb_peek(&aun_queue); | |
986 | while (skb && skb != (struct sk_buff *)&aun_queue) | |
987 | { | |
988 | struct sk_buff *newskb = skb->next; | |
989 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
990 | if ((jiffies - eb->start) > eb->timeout) | |
991 | { | |
c9b6aab9 | 992 | tx_result(skb->sk, eb->cookie, |
1da177e4 | 993 | ECTYPE_TRANSMIT_NOT_PRESENT); |
8728b834 | 994 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
995 | kfree_skb(skb); |
996 | } | |
997 | skb = newskb; | |
998 | } | |
999 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
1000 | ||
1001 | mod_timer(&ab_cleanup_timer, jiffies + (HZ*2)); | |
1002 | } | |
1003 | ||
1004 | static int __init aun_udp_initialise(void) | |
1005 | { | |
1006 | int error; | |
1007 | struct sockaddr_in sin; | |
1008 | ||
1009 | skb_queue_head_init(&aun_queue); | |
1010 | spin_lock_init(&aun_queue_lock); | |
1011 | init_timer(&ab_cleanup_timer); | |
1012 | ab_cleanup_timer.expires = jiffies + (HZ*2); | |
1013 | ab_cleanup_timer.function = ab_cleanup; | |
1014 | add_timer(&ab_cleanup_timer); | |
1015 | ||
1016 | memset(&sin, 0, sizeof(sin)); | |
1017 | sin.sin_port = htons(AUN_PORT); | |
1018 | ||
1019 | /* We can count ourselves lucky Acorn machines are too dim to | |
1020 | speak IPv6. :-) */ | |
1021 | if ((error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock)) < 0) | |
1022 | { | |
1023 | printk("AUN: socket error %d\n", -error); | |
1024 | return error; | |
1025 | } | |
c9b6aab9 | 1026 | |
1da177e4 LT |
1027 | udpsock->sk->sk_reuse = 1; |
1028 | udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it | |
1029 | from interrupts */ | |
c9b6aab9 | 1030 | |
1da177e4 LT |
1031 | error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin, |
1032 | sizeof(sin)); | |
1033 | if (error < 0) | |
1034 | { | |
1035 | printk("AUN: bind error %d\n", -error); | |
1036 | goto release; | |
1037 | } | |
1038 | ||
1039 | udpsock->sk->sk_data_ready = aun_data_available; | |
1040 | ||
1041 | return 0; | |
1042 | ||
1043 | release: | |
1044 | sock_release(udpsock); | |
1045 | udpsock = NULL; | |
1046 | return error; | |
1047 | } | |
1048 | #endif | |
1049 | ||
1050 | #ifdef CONFIG_ECONET_NATIVE | |
1051 | ||
1052 | /* | |
1053 | * Receive an Econet frame from a device. | |
1054 | */ | |
1055 | ||
f2ccd8fa | 1056 | static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
1057 | { |
1058 | struct ec_framehdr *hdr; | |
1059 | struct sock *sk; | |
1060 | struct ec_device *edev = dev->ec_ptr; | |
1061 | ||
1062 | if (skb->pkt_type == PACKET_OTHERHOST) | |
1063 | goto drop; | |
1064 | ||
1065 | if (!edev) | |
1066 | goto drop; | |
1067 | ||
1068 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
1069 | return NET_RX_DROP; | |
1070 | ||
1071 | if (!pskb_may_pull(skb, sizeof(struct ec_framehdr))) | |
1072 | goto drop; | |
1073 | ||
1074 | hdr = (struct ec_framehdr *) skb->data; | |
1075 | ||
1076 | /* First check for encapsulated IP */ | |
1077 | if (hdr->port == EC_PORT_IP) { | |
1078 | skb->protocol = htons(ETH_P_IP); | |
1079 | skb_pull(skb, sizeof(struct ec_framehdr)); | |
1080 | netif_rx(skb); | |
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net); | |
1085 | if (!sk) | |
1086 | goto drop; | |
1087 | ||
1088 | if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb, | |
1089 | hdr->port)) | |
1090 | goto drop; | |
1091 | ||
1092 | return 0; | |
1093 | ||
1094 | drop: | |
1095 | kfree_skb(skb); | |
1096 | return NET_RX_DROP; | |
1097 | } | |
1098 | ||
1099 | static struct packet_type econet_packet_type = { | |
1100 | .type = __constant_htons(ETH_P_ECONET), | |
1101 | .func = econet_rcv, | |
1102 | }; | |
1103 | ||
1104 | static void econet_hw_initialise(void) | |
1105 | { | |
1106 | dev_add_pack(&econet_packet_type); | |
1107 | } | |
1108 | ||
1109 | #endif | |
1110 | ||
1111 | static int econet_notifier(struct notifier_block *this, unsigned long msg, void *data) | |
1112 | { | |
1113 | struct net_device *dev = (struct net_device *)data; | |
1114 | struct ec_device *edev; | |
1115 | ||
1116 | switch (msg) { | |
1117 | case NETDEV_UNREGISTER: | |
1118 | /* A device has gone down - kill any data we hold for it. */ | |
1119 | edev = dev->ec_ptr; | |
1120 | if (edev) | |
1121 | { | |
1122 | if (net2dev_map[0] == dev) | |
1123 | net2dev_map[0] = NULL; | |
1124 | net2dev_map[edev->net] = NULL; | |
1125 | kfree(edev); | |
1126 | dev->ec_ptr = NULL; | |
1127 | } | |
1128 | break; | |
1129 | } | |
1130 | ||
1131 | return NOTIFY_DONE; | |
1132 | } | |
1133 | ||
1134 | static struct notifier_block econet_netdev_notifier = { | |
1135 | .notifier_call =econet_notifier, | |
1136 | }; | |
1137 | ||
1138 | static void __exit econet_proto_exit(void) | |
1139 | { | |
1140 | #ifdef CONFIG_ECONET_AUNUDP | |
1141 | del_timer(&ab_cleanup_timer); | |
1142 | if (udpsock) | |
1143 | sock_release(udpsock); | |
1144 | #endif | |
1145 | unregister_netdevice_notifier(&econet_netdev_notifier); | |
1146 | sock_unregister(econet_family_ops.family); | |
1147 | proto_unregister(&econet_proto); | |
1148 | } | |
1149 | ||
1150 | static int __init econet_proto_init(void) | |
1151 | { | |
1152 | int err = proto_register(&econet_proto, 0); | |
1153 | ||
1154 | if (err != 0) | |
1155 | goto out; | |
1156 | sock_register(&econet_family_ops); | |
1157 | #ifdef CONFIG_ECONET_AUNUDP | |
1158 | spin_lock_init(&aun_queue_lock); | |
1159 | aun_udp_initialise(); | |
1160 | #endif | |
1161 | #ifdef CONFIG_ECONET_NATIVE | |
1162 | econet_hw_initialise(); | |
1163 | #endif | |
1164 | register_netdevice_notifier(&econet_netdev_notifier); | |
1165 | out: | |
1166 | return err; | |
1167 | } | |
1168 | ||
1169 | module_init(econet_proto_init); | |
1170 | module_exit(econet_proto_exit); | |
1171 | ||
1172 | MODULE_LICENSE("GPL"); | |
1173 | MODULE_ALIAS_NETPROTO(PF_ECONET); |