Commit | Line | Data |
---|---|---|
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 | ||
ee9c88f2 JP |
12 | #define pr_fmt(fmt) fmt |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
16 | #include <linux/types.h> | |
17 | #include <linux/kernel.h> | |
1da177e4 LT |
18 | #include <linux/string.h> |
19 | #include <linux/mm.h> | |
20 | #include <linux/socket.h> | |
21 | #include <linux/sockios.h> | |
22 | #include <linux/in.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/if_ether.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/inetdevice.h> | |
28 | #include <linux/route.h> | |
29 | #include <linux/inet.h> | |
30 | #include <linux/etherdevice.h> | |
31 | #include <linux/if_arp.h> | |
32 | #include <linux/wireless.h> | |
33 | #include <linux/skbuff.h> | |
14c85021 | 34 | #include <linux/udp.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
a27e13d3 | 36 | #include <linux/vmalloc.h> |
1da177e4 LT |
37 | #include <net/sock.h> |
38 | #include <net/inet_common.h> | |
39 | #include <linux/stat.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/if_ec.h> | |
42 | #include <net/udp.h> | |
43 | #include <net/ip.h> | |
44 | #include <linux/spinlock.h> | |
45 | #include <linux/rcupdate.h> | |
46 | #include <linux/bitops.h> | |
1d181831 | 47 | #include <linux/mutex.h> |
1da177e4 | 48 | |
ee9c88f2 | 49 | #include <linux/uaccess.h> |
1da177e4 LT |
50 | #include <asm/system.h> |
51 | ||
90ddc4f0 | 52 | static const struct proto_ops econet_ops; |
1da177e4 | 53 | static struct hlist_head econet_sklist; |
0c78a92f | 54 | static DEFINE_SPINLOCK(econet_lock); |
1d181831 | 55 | static DEFINE_MUTEX(econet_mutex); |
1da177e4 LT |
56 | |
57 | /* Since there are only 256 possible network numbers (or fewer, depends | |
58 | how you count) it makes sense to use a simple lookup table. */ | |
59 | static struct net_device *net2dev_map[256]; | |
60 | ||
61 | #define EC_PORT_IP 0xd2 | |
62 | ||
63 | #ifdef CONFIG_ECONET_AUNUDP | |
ca403302 | 64 | static DEFINE_SPINLOCK(aun_queue_lock); |
1da177e4 LT |
65 | static struct socket *udpsock; |
66 | #define AUN_PORT 0x8000 | |
67 | ||
ee9c88f2 | 68 | struct aunhdr { |
1da177e4 LT |
69 | unsigned char code; /* AUN magic protocol byte */ |
70 | unsigned char port; | |
71 | unsigned char cb; | |
72 | unsigned char pad; | |
73 | unsigned long handle; | |
74 | }; | |
75 | ||
76 | static unsigned long aun_seq; | |
77 | ||
78 | /* Queue of packets waiting to be transmitted. */ | |
79 | static struct sk_buff_head aun_queue; | |
80 | static struct timer_list ab_cleanup_timer; | |
81 | ||
82 | #endif /* CONFIG_ECONET_AUNUDP */ | |
83 | ||
84 | /* Per-packet information */ | |
ee9c88f2 | 85 | struct ec_cb { |
1da177e4 LT |
86 | struct sockaddr_ec sec; |
87 | unsigned long cookie; /* Supplied by user. */ | |
88 | #ifdef CONFIG_ECONET_AUNUDP | |
89 | int done; | |
90 | unsigned long seq; /* Sequencing */ | |
91 | unsigned long timeout; /* Timeout */ | |
92 | unsigned long start; /* jiffies */ | |
93 | #endif | |
94 | #ifdef CONFIG_ECONET_NATIVE | |
95 | void (*sent)(struct sk_buff *, int result); | |
96 | #endif | |
97 | }; | |
98 | ||
99 | static void econet_remove_socket(struct hlist_head *list, struct sock *sk) | |
100 | { | |
0c78a92f | 101 | spin_lock_bh(&econet_lock); |
1da177e4 | 102 | sk_del_node_init(sk); |
0c78a92f | 103 | spin_unlock_bh(&econet_lock); |
1da177e4 LT |
104 | } |
105 | ||
106 | static void econet_insert_socket(struct hlist_head *list, struct sock *sk) | |
107 | { | |
0c78a92f | 108 | spin_lock_bh(&econet_lock); |
1da177e4 | 109 | sk_add_node(sk, list); |
0c78a92f | 110 | spin_unlock_bh(&econet_lock); |
1da177e4 LT |
111 | } |
112 | ||
113 | /* | |
114 | * Pull a packet from our receive queue and hand it to the user. | |
115 | * If necessary we block. | |
116 | */ | |
117 | ||
118 | static int econet_recvmsg(struct kiocb *iocb, struct socket *sock, | |
119 | struct msghdr *msg, size_t len, int flags) | |
120 | { | |
121 | struct sock *sk = sock->sk; | |
122 | struct sk_buff *skb; | |
123 | size_t copied; | |
124 | int err; | |
125 | ||
126 | msg->msg_namelen = sizeof(struct sockaddr_ec); | |
127 | ||
1d181831 DM |
128 | mutex_lock(&econet_mutex); |
129 | ||
1da177e4 LT |
130 | /* |
131 | * Call the generic datagram receiver. This handles all sorts | |
132 | * of horrible races and re-entrancy so we can forget about it | |
133 | * in the protocol layers. | |
134 | * | |
135 | * Now it will return ENETDOWN, if device have just gone down, | |
136 | * but then it will block. | |
137 | */ | |
138 | ||
ee9c88f2 | 139 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err); |
1da177e4 LT |
140 | |
141 | /* | |
c9b6aab9 | 142 | * An error occurred so return it. Because skb_recv_datagram() |
1da177e4 LT |
143 | * handles the blocking we don't see and worry about blocking |
144 | * retries. | |
145 | */ | |
146 | ||
ee9c88f2 | 147 | if (skb == NULL) |
1da177e4 LT |
148 | goto out; |
149 | ||
150 | /* | |
151 | * You lose any data beyond the buffer you gave. If it worries a | |
152 | * user program they can ask the device for its MTU anyway. | |
153 | */ | |
154 | ||
155 | copied = skb->len; | |
ee9c88f2 JP |
156 | if (copied > len) { |
157 | copied = len; | |
158 | msg->msg_flags |= MSG_TRUNC; | |
1da177e4 LT |
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 | ||
ee9c88f2 JP |
187 | static int econet_bind(struct socket *sock, struct sockaddr *uaddr, |
188 | int addr_len) | |
1da177e4 LT |
189 | { |
190 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; | |
1d181831 DM |
191 | struct sock *sk; |
192 | struct econet_sock *eo; | |
c9b6aab9 | 193 | |
1da177e4 LT |
194 | /* |
195 | * Check legality | |
196 | */ | |
c9b6aab9 | 197 | |
1da177e4 LT |
198 | if (addr_len < sizeof(struct sockaddr_ec) || |
199 | sec->sec_family != AF_ECONET) | |
200 | return -EINVAL; | |
c9b6aab9 | 201 | |
1d181831 DM |
202 | mutex_lock(&econet_mutex); |
203 | ||
204 | sk = sock->sk; | |
205 | eo = ec_sk(sk); | |
206 | ||
1da177e4 LT |
207 | eo->cb = sec->cb; |
208 | eo->port = sec->port; | |
209 | eo->station = sec->addr.station; | |
210 | eo->net = sec->addr.net; | |
211 | ||
1d181831 DM |
212 | mutex_unlock(&econet_mutex); |
213 | ||
1da177e4 LT |
214 | return 0; |
215 | } | |
216 | ||
217 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
218 | /* | |
219 | * Queue a transmit result for the user to be told about. | |
220 | */ | |
221 | ||
222 | static void tx_result(struct sock *sk, unsigned long cookie, int result) | |
223 | { | |
224 | struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC); | |
225 | struct ec_cb *eb; | |
226 | struct sockaddr_ec *sec; | |
227 | ||
ee9c88f2 JP |
228 | if (skb == NULL) { |
229 | pr_debug("econet: memory squeeze, transmit result dropped\n"); | |
1da177e4 LT |
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 | { | |
ee9c88f2 | 266 | struct sockaddr_ec *saddr = (struct sockaddr_ec *)msg->msg_name; |
1da177e4 LT |
267 | struct net_device *dev; |
268 | struct ec_addr addr; | |
269 | int err; | |
270 | unsigned char port, cb; | |
271 | #if defined(CONFIG_ECONET_AUNUDP) || defined(CONFIG_ECONET_NATIVE) | |
389f2a18 | 272 | struct sock *sk = sock->sk; |
1da177e4 LT |
273 | struct sk_buff *skb; |
274 | struct ec_cb *eb; | |
275 | #endif | |
276 | #ifdef CONFIG_ECONET_AUNUDP | |
277 | struct msghdr udpmsg; | |
a27e13d3 | 278 | struct iovec iov[2]; |
1da177e4 LT |
279 | struct aunhdr ah; |
280 | struct sockaddr_in udpdest; | |
281 | __kernel_size_t size; | |
1da177e4 | 282 | mm_segment_t oldfs; |
a27e13d3 | 283 | char *userbuf; |
1da177e4 | 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 | ||
ee9c88f2 JP |
299 | if (saddr == NULL || msg->msg_namelen < sizeof(struct sockaddr_ec)) { |
300 | mutex_unlock(&econet_mutex); | |
301 | return -EINVAL; | |
302 | } | |
303 | addr.station = saddr->addr.station; | |
304 | addr.net = saddr->addr.net; | |
305 | port = saddr->port; | |
306 | cb = saddr->cb; | |
1da177e4 LT |
307 | |
308 | /* Look for a device with the right network number. */ | |
309 | dev = net2dev_map[addr.net]; | |
310 | ||
311 | /* If not directly reachable, use some default */ | |
1d181831 | 312 | if (dev == NULL) { |
1da177e4 LT |
313 | dev = net2dev_map[0]; |
314 | /* No interfaces at all? */ | |
1d181831 DM |
315 | if (dev == NULL) { |
316 | mutex_unlock(&econet_mutex); | |
1da177e4 | 317 | return -ENETDOWN; |
1d181831 | 318 | } |
1da177e4 LT |
319 | } |
320 | ||
1d181831 | 321 | if (dev->type == ARPHRD_ECONET) { |
1da177e4 LT |
322 | /* Real hardware Econet. We're not worthy etc. */ |
323 | #ifdef CONFIG_ECONET_NATIVE | |
324 | unsigned short proto = 0; | |
ae641949 | 325 | int hlen, tlen; |
0c4e8581 | 326 | int res; |
1da177e4 | 327 | |
a27e13d3 PB |
328 | if (len + 15 > dev->mtu) { |
329 | mutex_unlock(&econet_mutex); | |
330 | return -EMSGSIZE; | |
331 | } | |
332 | ||
1da177e4 | 333 | dev_hold(dev); |
c9b6aab9 | 334 | |
ae641949 HX |
335 | hlen = LL_RESERVED_SPACE(dev); |
336 | tlen = dev->needed_tailroom; | |
337 | skb = sock_alloc_send_skb(sk, len + hlen + tlen, | |
1da177e4 | 338 | msg->msg_flags & MSG_DONTWAIT, &err); |
ee9c88f2 | 339 | if (skb == NULL) |
1da177e4 | 340 | goto out_unlock; |
c9b6aab9 | 341 | |
ae641949 | 342 | skb_reserve(skb, hlen); |
c1d2bbe1 | 343 | skb_reset_network_header(skb); |
c9b6aab9 | 344 | |
1da177e4 | 345 | eb = (struct ec_cb *)&skb->cb; |
c9b6aab9 | 346 | |
1da177e4 LT |
347 | eb->cookie = saddr->cookie; |
348 | eb->sec = *saddr; | |
349 | eb->sent = ec_tx_done; | |
350 | ||
0c4e8581 SH |
351 | err = -EINVAL; |
352 | res = dev_hard_header(skb, dev, ntohs(proto), &addr, NULL, len); | |
353 | if (res < 0) | |
354 | goto out_free; | |
355 | if (res > 0) { | |
1da177e4 | 356 | struct ec_framehdr *fh; |
1da177e4 LT |
357 | /* Poke in our control byte and |
358 | port number. Hack, hack. */ | |
ee9c88f2 | 359 | fh = (struct ec_framehdr *)skb->data; |
1da177e4 LT |
360 | fh->cb = cb; |
361 | fh->port = port; | |
362 | if (sock->type != SOCK_DGRAM) { | |
27a884dc | 363 | skb_reset_tail_pointer(skb); |
1da177e4 | 364 | skb->len = 0; |
0c4e8581 | 365 | } |
1da177e4 | 366 | } |
c9b6aab9 | 367 | |
1da177e4 | 368 | /* Copy the data. Returns -EFAULT on error */ |
ee9c88f2 | 369 | err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); |
1da177e4 LT |
370 | skb->protocol = proto; |
371 | skb->dev = dev; | |
372 | skb->priority = sk->sk_priority; | |
373 | if (err) | |
374 | goto out_free; | |
c9b6aab9 | 375 | |
1da177e4 LT |
376 | err = -ENETDOWN; |
377 | if (!(dev->flags & IFF_UP)) | |
378 | goto out_free; | |
c9b6aab9 | 379 | |
1da177e4 LT |
380 | /* |
381 | * Now send it | |
382 | */ | |
c9b6aab9 | 383 | |
1da177e4 LT |
384 | dev_queue_xmit(skb); |
385 | dev_put(dev); | |
1d181831 | 386 | mutex_unlock(&econet_mutex); |
a02cec21 | 387 | return len; |
1da177e4 | 388 | |
ee9c88f2 | 389 | out_free: |
1da177e4 | 390 | kfree_skb(skb); |
ee9c88f2 | 391 | out_unlock: |
1da177e4 LT |
392 | if (dev) |
393 | dev_put(dev); | |
394 | #else | |
395 | err = -EPROTOTYPE; | |
396 | #endif | |
1d181831 DM |
397 | mutex_unlock(&econet_mutex); |
398 | ||
1da177e4 LT |
399 | return err; |
400 | } | |
401 | ||
402 | #ifdef CONFIG_ECONET_AUNUDP | |
403 | /* AUN virtual Econet. */ | |
404 | ||
1d181831 DM |
405 | if (udpsock == NULL) { |
406 | mutex_unlock(&econet_mutex); | |
1da177e4 | 407 | return -ENETDOWN; /* No socket - can't send */ |
1d181831 | 408 | } |
c9b6aab9 | 409 | |
a27e13d3 PB |
410 | if (len > 32768) { |
411 | err = -E2BIG; | |
412 | goto error; | |
413 | } | |
414 | ||
1da177e4 LT |
415 | /* Make up a UDP datagram and hand it off to some higher intellect. */ |
416 | ||
417 | memset(&udpdest, 0, sizeof(udpdest)); | |
418 | udpdest.sin_family = AF_INET; | |
419 | udpdest.sin_port = htons(AUN_PORT); | |
420 | ||
421 | /* At the moment we use the stupid Acorn scheme of Econet address | |
422 | y.x maps to IP a.b.c.x. This should be replaced with something | |
423 | more flexible and more aware of subnet masks. */ | |
424 | { | |
425 | struct in_device *idev; | |
426 | unsigned long network = 0; | |
427 | ||
428 | rcu_read_lock(); | |
e5ed6399 | 429 | idev = __in_dev_get_rcu(dev); |
1da177e4 LT |
430 | if (idev) { |
431 | if (idev->ifa_list) | |
c9b6aab9 | 432 | network = ntohl(idev->ifa_list->ifa_address) & |
1da177e4 LT |
433 | 0xffffff00; /* !!! */ |
434 | } | |
435 | rcu_read_unlock(); | |
436 | udpdest.sin_addr.s_addr = htonl(network | addr.station); | |
437 | } | |
438 | ||
67c5c6cb | 439 | memset(&ah, 0, sizeof(ah)); |
1da177e4 LT |
440 | ah.port = port; |
441 | ah.cb = cb & 0x7f; | |
442 | ah.code = 2; /* magic */ | |
1da177e4 LT |
443 | |
444 | /* tack our header on the front of the iovec */ | |
445 | size = sizeof(struct aunhdr); | |
1da177e4 LT |
446 | iov[0].iov_base = (void *)&ah; |
447 | iov[0].iov_len = size; | |
a27e13d3 PB |
448 | |
449 | userbuf = vmalloc(len); | |
450 | if (userbuf == NULL) { | |
451 | err = -ENOMEM; | |
452 | goto error; | |
1da177e4 LT |
453 | } |
454 | ||
a27e13d3 PB |
455 | iov[1].iov_base = userbuf; |
456 | iov[1].iov_len = len; | |
457 | err = memcpy_fromiovec(userbuf, msg->msg_iov, len); | |
458 | if (err) | |
459 | goto error_free_buf; | |
460 | ||
1da177e4 | 461 | /* Get a skbuff (no data, just holds our cb information) */ |
ee9c88f2 JP |
462 | skb = sock_alloc_send_skb(sk, 0, msg->msg_flags & MSG_DONTWAIT, &err); |
463 | if (skb == NULL) | |
a27e13d3 | 464 | goto error_free_buf; |
1da177e4 LT |
465 | |
466 | eb = (struct ec_cb *)&skb->cb; | |
467 | ||
468 | eb->cookie = saddr->cookie; | |
ee9c88f2 | 469 | eb->timeout = 5 * HZ; |
1da177e4 LT |
470 | eb->start = jiffies; |
471 | ah.handle = aun_seq; | |
472 | eb->seq = (aun_seq++); | |
473 | eb->sec = *saddr; | |
474 | ||
475 | skb_queue_tail(&aun_queue, skb); | |
476 | ||
477 | udpmsg.msg_name = (void *)&udpdest; | |
478 | udpmsg.msg_namelen = sizeof(udpdest); | |
479 | udpmsg.msg_iov = &iov[0]; | |
a27e13d3 | 480 | udpmsg.msg_iovlen = 2; |
1da177e4 LT |
481 | udpmsg.msg_control = NULL; |
482 | udpmsg.msg_controllen = 0; | |
ee9c88f2 | 483 | udpmsg.msg_flags = 0; |
1da177e4 | 484 | |
ee9c88f2 JP |
485 | oldfs = get_fs(); |
486 | set_fs(KERNEL_DS); /* More privs :-) */ | |
1da177e4 LT |
487 | err = sock_sendmsg(udpsock, &udpmsg, size); |
488 | set_fs(oldfs); | |
a27e13d3 PB |
489 | |
490 | error_free_buf: | |
491 | vfree(userbuf); | |
389f2a18 | 492 | error: |
1da177e4 LT |
493 | #else |
494 | err = -EPROTOTYPE; | |
495 | #endif | |
1d181831 DM |
496 | mutex_unlock(&econet_mutex); |
497 | ||
1da177e4 LT |
498 | return err; |
499 | } | |
500 | ||
501 | /* | |
502 | * Look up the address of a socket. | |
503 | */ | |
504 | ||
505 | static int econet_getname(struct socket *sock, struct sockaddr *uaddr, | |
506 | int *uaddr_len, int peer) | |
507 | { | |
1d181831 DM |
508 | struct sock *sk; |
509 | struct econet_sock *eo; | |
1da177e4 LT |
510 | struct sockaddr_ec *sec = (struct sockaddr_ec *)uaddr; |
511 | ||
512 | if (peer) | |
513 | return -EOPNOTSUPP; | |
514 | ||
80922bbb | 515 | memset(sec, 0, sizeof(*sec)); |
1d181831 DM |
516 | mutex_lock(&econet_mutex); |
517 | ||
518 | sk = sock->sk; | |
519 | eo = ec_sk(sk); | |
520 | ||
1da177e4 LT |
521 | sec->sec_family = AF_ECONET; |
522 | sec->port = eo->port; | |
523 | sec->addr.station = eo->station; | |
524 | sec->addr.net = eo->net; | |
525 | ||
1d181831 DM |
526 | mutex_unlock(&econet_mutex); |
527 | ||
1da177e4 LT |
528 | *uaddr_len = sizeof(*sec); |
529 | return 0; | |
530 | } | |
531 | ||
532 | static void econet_destroy_timer(unsigned long data) | |
533 | { | |
ee9c88f2 | 534 | struct sock *sk = (struct sock *)data; |
1da177e4 | 535 | |
c564039f | 536 | if (!sk_has_allocations(sk)) { |
1da177e4 LT |
537 | sk_free(sk); |
538 | return; | |
539 | } | |
540 | ||
541 | sk->sk_timer.expires = jiffies + 10 * HZ; | |
542 | add_timer(&sk->sk_timer); | |
ee9c88f2 | 543 | pr_debug("econet: socket destroy delayed\n"); |
1da177e4 LT |
544 | } |
545 | ||
546 | /* | |
547 | * Close an econet socket. | |
548 | */ | |
549 | ||
550 | static int econet_release(struct socket *sock) | |
551 | { | |
1d181831 | 552 | struct sock *sk; |
1da177e4 | 553 | |
1d181831 DM |
554 | mutex_lock(&econet_mutex); |
555 | ||
556 | sk = sock->sk; | |
1da177e4 | 557 | if (!sk) |
1d181831 | 558 | goto out_unlock; |
1da177e4 LT |
559 | |
560 | econet_remove_socket(&econet_sklist, sk); | |
561 | ||
562 | /* | |
563 | * Now the socket is dead. No more input will appear. | |
564 | */ | |
565 | ||
566 | sk->sk_state_change(sk); /* It is useless. Just for sanity. */ | |
567 | ||
0efffaf9 | 568 | sock_orphan(sk); |
1da177e4 LT |
569 | |
570 | /* Purge queues */ | |
571 | ||
572 | skb_queue_purge(&sk->sk_receive_queue); | |
573 | ||
c564039f | 574 | if (sk_has_allocations(sk)) { |
1da177e4 LT |
575 | sk->sk_timer.data = (unsigned long)sk; |
576 | sk->sk_timer.expires = jiffies + HZ; | |
577 | sk->sk_timer.function = econet_destroy_timer; | |
578 | add_timer(&sk->sk_timer); | |
1d181831 DM |
579 | |
580 | goto out_unlock; | |
1da177e4 LT |
581 | } |
582 | ||
583 | sk_free(sk); | |
1d181831 DM |
584 | |
585 | out_unlock: | |
586 | mutex_unlock(&econet_mutex); | |
1da177e4 LT |
587 | return 0; |
588 | } | |
589 | ||
590 | static struct proto econet_proto = { | |
591 | .name = "ECONET", | |
592 | .owner = THIS_MODULE, | |
593 | .obj_size = sizeof(struct econet_sock), | |
594 | }; | |
595 | ||
596 | /* | |
597 | * Create an Econet socket | |
598 | */ | |
599 | ||
3f378b68 EP |
600 | static int econet_create(struct net *net, struct socket *sock, int protocol, |
601 | int kern) | |
1da177e4 LT |
602 | { |
603 | struct sock *sk; | |
604 | struct econet_sock *eo; | |
605 | int err; | |
606 | ||
09ad9bc7 | 607 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
608 | return -EAFNOSUPPORT; |
609 | ||
1da177e4 LT |
610 | /* Econet only provides datagram services. */ |
611 | if (sock->type != SOCK_DGRAM) | |
612 | return -ESOCKTNOSUPPORT; | |
613 | ||
614 | sock->state = SS_UNCONNECTED; | |
615 | ||
616 | err = -ENOBUFS; | |
6257ff21 | 617 | sk = sk_alloc(net, PF_ECONET, GFP_KERNEL, &econet_proto); |
1da177e4 LT |
618 | if (sk == NULL) |
619 | goto out; | |
620 | ||
621 | sk->sk_reuse = 1; | |
622 | sock->ops = &econet_ops; | |
623 | sock_init_data(sock, sk); | |
624 | ||
625 | eo = ec_sk(sk); | |
626 | sock_reset_flag(sk, SOCK_ZAPPED); | |
627 | sk->sk_family = PF_ECONET; | |
628 | eo->num = protocol; | |
629 | ||
630 | econet_insert_socket(&econet_sklist, sk); | |
a02cec21 | 631 | return 0; |
1da177e4 LT |
632 | out: |
633 | return err; | |
634 | } | |
635 | ||
636 | /* | |
637 | * Handle Econet specific ioctls | |
638 | */ | |
639 | ||
640 | static int ec_dev_ioctl(struct socket *sock, unsigned int cmd, void __user *arg) | |
641 | { | |
642 | struct ifreq ifr; | |
643 | struct ec_device *edev; | |
644 | struct net_device *dev; | |
645 | struct sockaddr_ec *sec; | |
1d181831 | 646 | int err; |
1da177e4 LT |
647 | |
648 | /* | |
649 | * Fetch the caller's info block into kernel space | |
650 | */ | |
651 | ||
652 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
653 | return -EFAULT; | |
654 | ||
ee9c88f2 JP |
655 | dev = dev_get_by_name(&init_net, ifr.ifr_name); |
656 | if (dev == NULL) | |
1da177e4 LT |
657 | return -ENODEV; |
658 | ||
659 | sec = (struct sockaddr_ec *)&ifr.ifr_addr; | |
660 | ||
1d181831 DM |
661 | mutex_lock(&econet_mutex); |
662 | ||
663 | err = 0; | |
664 | switch (cmd) { | |
1da177e4 | 665 | case SIOCSIFADDR: |
0c62fc6d NE |
666 | if (!capable(CAP_NET_ADMIN)) { |
667 | err = -EPERM; | |
668 | break; | |
669 | } | |
16c41745 | 670 | |
1da177e4 | 671 | edev = dev->ec_ptr; |
1d181831 | 672 | if (edev == NULL) { |
1da177e4 | 673 | /* Magic up a new one. */ |
0da974f4 | 674 | edev = kzalloc(sizeof(struct ec_device), GFP_KERNEL); |
1da177e4 | 675 | if (edev == NULL) { |
1d181831 DM |
676 | err = -ENOMEM; |
677 | break; | |
1da177e4 | 678 | } |
1da177e4 | 679 | dev->ec_ptr = edev; |
1d181831 | 680 | } else |
1da177e4 LT |
681 | net2dev_map[edev->net] = NULL; |
682 | edev->station = sec->addr.station; | |
683 | edev->net = sec->addr.net; | |
684 | net2dev_map[sec->addr.net] = dev; | |
685 | if (!net2dev_map[0]) | |
686 | net2dev_map[0] = dev; | |
1d181831 | 687 | break; |
1da177e4 LT |
688 | |
689 | case SIOCGIFADDR: | |
690 | edev = dev->ec_ptr; | |
1d181831 DM |
691 | if (edev == NULL) { |
692 | err = -ENODEV; | |
693 | break; | |
1da177e4 LT |
694 | } |
695 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
696 | sec->addr.station = edev->station; | |
697 | sec->addr.net = edev->net; | |
698 | sec->sec_family = AF_ECONET; | |
699 | dev_put(dev); | |
700 | if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
1d181831 DM |
701 | err = -EFAULT; |
702 | break; | |
703 | ||
704 | default: | |
705 | err = -EINVAL; | |
706 | break; | |
1da177e4 LT |
707 | } |
708 | ||
1d181831 DM |
709 | mutex_unlock(&econet_mutex); |
710 | ||
1da177e4 | 711 | dev_put(dev); |
1d181831 DM |
712 | |
713 | return err; | |
1da177e4 LT |
714 | } |
715 | ||
716 | /* | |
717 | * Handle generic ioctls | |
718 | */ | |
719 | ||
ee9c88f2 JP |
720 | static int econet_ioctl(struct socket *sock, unsigned int cmd, |
721 | unsigned long arg) | |
1da177e4 LT |
722 | { |
723 | struct sock *sk = sock->sk; | |
724 | void __user *argp = (void __user *)arg; | |
725 | ||
075e1913 JP |
726 | switch (cmd) { |
727 | case SIOCGSTAMP: | |
728 | return sock_get_timestamp(sk, argp); | |
1da177e4 | 729 | |
075e1913 JP |
730 | case SIOCGSTAMPNS: |
731 | return sock_get_timestampns(sk, argp); | |
ae40eb1e | 732 | |
075e1913 JP |
733 | case SIOCSIFADDR: |
734 | case SIOCGIFADDR: | |
735 | return ec_dev_ioctl(sock, cmd, argp); | |
1da177e4 | 736 | |
1da177e4 | 737 | } |
075e1913 JP |
738 | |
739 | return -ENOIOCTLCMD; | |
1da177e4 LT |
740 | } |
741 | ||
ec1b4cf7 | 742 | static const struct net_proto_family econet_family_ops = { |
1da177e4 LT |
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 | ||
0c78a92f | 780 | spin_lock(&econet_lock); |
1da177e4 LT |
781 | sk_for_each(sk, node, &econet_sklist) { |
782 | struct econet_sock *opt = ec_sk(sk); | |
c9b6aab9 | 783 | if ((opt->port == port || opt->port == 0) && |
1da177e4 | 784 | (opt->station == station || opt->station == 0) && |
0c78a92f ED |
785 | (opt->net == net || opt->net == 0)) { |
786 | sock_hold(sk); | |
1da177e4 | 787 | goto found; |
0c78a92f | 788 | } |
1da177e4 LT |
789 | } |
790 | sk = NULL; | |
791 | found: | |
0c78a92f | 792 | spin_unlock(&econet_lock); |
1da177e4 LT |
793 | return sk; |
794 | } | |
795 | ||
796 | /* | |
797 | * Queue a received packet for a socket. | |
798 | */ | |
799 | ||
800 | static int ec_queue_packet(struct sock *sk, struct sk_buff *skb, | |
801 | unsigned char stn, unsigned char net, | |
802 | unsigned char cb, unsigned char port) | |
803 | { | |
804 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; | |
805 | struct sockaddr_ec *sec = (struct sockaddr_ec *)&eb->sec; | |
806 | ||
807 | memset(sec, 0, sizeof(struct sockaddr_ec)); | |
808 | sec->sec_family = AF_ECONET; | |
809 | sec->type = ECTYPE_PACKET_RECEIVED; | |
810 | sec->port = port; | |
811 | sec->cb = cb; | |
812 | sec->addr.net = net; | |
813 | sec->addr.station = stn; | |
814 | ||
815 | return sock_queue_rcv_skb(sk, skb); | |
816 | } | |
817 | #endif | |
818 | ||
819 | #ifdef CONFIG_ECONET_AUNUDP | |
820 | /* | |
c9b6aab9 | 821 | * Send an AUN protocol response. |
1da177e4 LT |
822 | */ |
823 | ||
824 | static void aun_send_response(__u32 addr, unsigned long seq, int code, int cb) | |
825 | { | |
826 | struct sockaddr_in sin = { | |
827 | .sin_family = AF_INET, | |
828 | .sin_port = htons(AUN_PORT), | |
829 | .sin_addr = {.s_addr = addr} | |
830 | }; | |
831 | struct aunhdr ah = {.code = code, .cb = cb, .handle = seq}; | |
832 | struct kvec iov = {.iov_base = (void *)&ah, .iov_len = sizeof(ah)}; | |
833 | struct msghdr udpmsg; | |
c9b6aab9 | 834 | |
1da177e4 LT |
835 | udpmsg.msg_name = (void *)&sin; |
836 | udpmsg.msg_namelen = sizeof(sin); | |
837 | udpmsg.msg_control = NULL; | |
838 | udpmsg.msg_controllen = 0; | |
ee9c88f2 | 839 | udpmsg.msg_flags = 0; |
1da177e4 LT |
840 | |
841 | kernel_sendmsg(udpsock, &udpmsg, &iov, 1, sizeof(ah)); | |
842 | } | |
843 | ||
844 | ||
845 | /* | |
846 | * Handle incoming AUN packets. Work out if anybody wants them, | |
847 | * and send positive or negative acknowledgements as appropriate. | |
848 | */ | |
849 | ||
850 | static void aun_incoming(struct sk_buff *skb, struct aunhdr *ah, size_t len) | |
851 | { | |
eddc9ec5 | 852 | struct iphdr *ip = ip_hdr(skb); |
1da177e4 | 853 | unsigned char stn = ntohl(ip->saddr) & 0xff; |
4e085e76 DM |
854 | struct dst_entry *dst = skb_dst(skb); |
855 | struct ec_device *edev = NULL; | |
0c78a92f | 856 | struct sock *sk = NULL; |
1da177e4 | 857 | struct sk_buff *newskb; |
4e085e76 DM |
858 | |
859 | if (dst) | |
860 | edev = dst->dev->ec_ptr; | |
1da177e4 | 861 | |
ee9c88f2 | 862 | if (!edev) |
1da177e4 LT |
863 | goto bad; |
864 | ||
ee9c88f2 JP |
865 | sk = ec_listening_socket(ah->port, stn, edev->net); |
866 | if (sk == NULL) | |
1da177e4 LT |
867 | goto bad; /* Nobody wants it */ |
868 | ||
c9b6aab9 | 869 | newskb = alloc_skb((len - sizeof(struct aunhdr) + 15) & ~15, |
1da177e4 | 870 | GFP_ATOMIC); |
ee9c88f2 JP |
871 | if (newskb == NULL) { |
872 | pr_debug("AUN: memory squeeze, dropping packet\n"); | |
1da177e4 LT |
873 | /* Send nack and hope sender tries again */ |
874 | goto bad; | |
875 | } | |
876 | ||
ee9c88f2 | 877 | memcpy(skb_put(newskb, len - sizeof(struct aunhdr)), (void *)(ah + 1), |
1da177e4 LT |
878 | len - sizeof(struct aunhdr)); |
879 | ||
ee9c88f2 | 880 | if (ec_queue_packet(sk, newskb, stn, edev->net, ah->cb, ah->port)) { |
1da177e4 LT |
881 | /* Socket is bankrupt. */ |
882 | kfree_skb(newskb); | |
883 | goto bad; | |
884 | } | |
885 | ||
886 | aun_send_response(ip->saddr, ah->handle, 3, 0); | |
0c78a92f | 887 | sock_put(sk); |
1da177e4 LT |
888 | return; |
889 | ||
890 | bad: | |
891 | aun_send_response(ip->saddr, ah->handle, 4, 0); | |
0c78a92f ED |
892 | if (sk) |
893 | sock_put(sk); | |
1da177e4 LT |
894 | } |
895 | ||
896 | /* | |
897 | * Handle incoming AUN transmit acknowledgements. If the sequence | |
898 | * number matches something in our backlog then kill it and tell | |
899 | * the user. If the remote took too long to reply then we may have | |
900 | * dropped the packet already. | |
901 | */ | |
902 | ||
903 | static void aun_tx_ack(unsigned long seq, int result) | |
904 | { | |
905 | struct sk_buff *skb; | |
906 | unsigned long flags; | |
907 | struct ec_cb *eb; | |
908 | ||
909 | spin_lock_irqsave(&aun_queue_lock, flags); | |
de103342 | 910 | skb_queue_walk(&aun_queue, skb) { |
1da177e4 LT |
911 | eb = (struct ec_cb *)&skb->cb; |
912 | if (eb->seq == seq) | |
913 | goto foundit; | |
1da177e4 LT |
914 | } |
915 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
ee9c88f2 | 916 | pr_debug("AUN: unknown sequence %ld\n", seq); |
1da177e4 LT |
917 | return; |
918 | ||
919 | foundit: | |
920 | tx_result(skb->sk, eb->cookie, result); | |
8728b834 | 921 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
922 | spin_unlock_irqrestore(&aun_queue_lock, flags); |
923 | kfree_skb(skb); | |
924 | } | |
925 | ||
926 | /* | |
927 | * Deal with received AUN frames - sort out what type of thing it is | |
928 | * and hand it to the right function. | |
929 | */ | |
930 | ||
931 | static void aun_data_available(struct sock *sk, int slen) | |
932 | { | |
933 | int err; | |
934 | struct sk_buff *skb; | |
935 | unsigned char *data; | |
936 | struct aunhdr *ah; | |
1da177e4 LT |
937 | size_t len; |
938 | ||
939 | while ((skb = skb_recv_datagram(sk, 0, 1, &err)) == NULL) { | |
940 | if (err == -EAGAIN) { | |
ee9c88f2 | 941 | pr_err("AUN: no data available?!\n"); |
1da177e4 LT |
942 | return; |
943 | } | |
ee9c88f2 | 944 | pr_debug("AUN: recvfrom() error %d\n", -err); |
1da177e4 LT |
945 | } |
946 | ||
9c70220b | 947 | data = skb_transport_header(skb) + sizeof(struct udphdr); |
1da177e4 LT |
948 | ah = (struct aunhdr *)data; |
949 | len = skb->len - sizeof(struct udphdr); | |
1da177e4 | 950 | |
ee9c88f2 | 951 | switch (ah->code) { |
1da177e4 LT |
952 | case 2: |
953 | aun_incoming(skb, ah, len); | |
954 | break; | |
955 | case 3: | |
956 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_OK); | |
957 | break; | |
958 | case 4: | |
959 | aun_tx_ack(ah->handle, ECTYPE_TRANSMIT_NOT_LISTENING); | |
960 | break; | |
1da177e4 | 961 | default: |
ee9c88f2 | 962 | pr_debug("AUN: unknown packet type: %d\n", data[0]); |
1da177e4 LT |
963 | } |
964 | ||
965 | skb_free_datagram(sk, skb); | |
966 | } | |
967 | ||
968 | /* | |
969 | * Called by the timer to manage the AUN transmit queue. If a packet | |
970 | * was sent to a dead or nonexistent host then we will never get an | |
971 | * acknowledgement back. After a few seconds we need to spot this and | |
972 | * drop the packet. | |
973 | */ | |
974 | ||
975 | static void ab_cleanup(unsigned long h) | |
976 | { | |
de103342 | 977 | struct sk_buff *skb, *n; |
1da177e4 LT |
978 | unsigned long flags; |
979 | ||
980 | spin_lock_irqsave(&aun_queue_lock, flags); | |
de103342 | 981 | skb_queue_walk_safe(&aun_queue, skb, n) { |
1da177e4 | 982 | struct ec_cb *eb = (struct ec_cb *)&skb->cb; |
de103342 | 983 | if ((jiffies - eb->start) > eb->timeout) { |
c9b6aab9 | 984 | tx_result(skb->sk, eb->cookie, |
1da177e4 | 985 | ECTYPE_TRANSMIT_NOT_PRESENT); |
8728b834 | 986 | skb_unlink(skb, &aun_queue); |
1da177e4 LT |
987 | kfree_skb(skb); |
988 | } | |
1da177e4 LT |
989 | } |
990 | spin_unlock_irqrestore(&aun_queue_lock, flags); | |
991 | ||
ee9c88f2 | 992 | mod_timer(&ab_cleanup_timer, jiffies + (HZ * 2)); |
1da177e4 LT |
993 | } |
994 | ||
995 | static int __init aun_udp_initialise(void) | |
996 | { | |
997 | int error; | |
998 | struct sockaddr_in sin; | |
999 | ||
1000 | skb_queue_head_init(&aun_queue); | |
b24b8a24 | 1001 | setup_timer(&ab_cleanup_timer, ab_cleanup, 0); |
ee9c88f2 | 1002 | ab_cleanup_timer.expires = jiffies + (HZ * 2); |
1da177e4 LT |
1003 | add_timer(&ab_cleanup_timer); |
1004 | ||
1005 | memset(&sin, 0, sizeof(sin)); | |
1006 | sin.sin_port = htons(AUN_PORT); | |
1007 | ||
1008 | /* We can count ourselves lucky Acorn machines are too dim to | |
1009 | speak IPv6. :-) */ | |
ee9c88f2 JP |
1010 | error = sock_create_kern(PF_INET, SOCK_DGRAM, 0, &udpsock); |
1011 | if (error < 0) { | |
1012 | pr_err("AUN: socket error %d\n", -error); | |
1da177e4 LT |
1013 | return error; |
1014 | } | |
c9b6aab9 | 1015 | |
1da177e4 LT |
1016 | udpsock->sk->sk_reuse = 1; |
1017 | udpsock->sk->sk_allocation = GFP_ATOMIC; /* we're going to call it | |
1018 | from interrupts */ | |
c9b6aab9 | 1019 | |
1da177e4 | 1020 | error = udpsock->ops->bind(udpsock, (struct sockaddr *)&sin, |
ee9c88f2 JP |
1021 | sizeof(sin)); |
1022 | if (error < 0) { | |
1023 | pr_err("AUN: bind error %d\n", -error); | |
1da177e4 LT |
1024 | goto release; |
1025 | } | |
1026 | ||
1027 | udpsock->sk->sk_data_ready = aun_data_available; | |
1028 | ||
1029 | return 0; | |
1030 | ||
1031 | release: | |
1032 | sock_release(udpsock); | |
1033 | udpsock = NULL; | |
1034 | return error; | |
1035 | } | |
1036 | #endif | |
1037 | ||
1038 | #ifdef CONFIG_ECONET_NATIVE | |
1039 | ||
1040 | /* | |
1041 | * Receive an Econet frame from a device. | |
1042 | */ | |
1043 | ||
ee9c88f2 JP |
1044 | static int econet_rcv(struct sk_buff *skb, struct net_device *dev, |
1045 | struct packet_type *pt, struct net_device *orig_dev) | |
1da177e4 LT |
1046 | { |
1047 | struct ec_framehdr *hdr; | |
0c78a92f | 1048 | struct sock *sk = NULL; |
1da177e4 LT |
1049 | struct ec_device *edev = dev->ec_ptr; |
1050 | ||
721499e8 | 1051 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
1052 | goto drop; |
1053 | ||
1da177e4 LT |
1054 | if (skb->pkt_type == PACKET_OTHERHOST) |
1055 | goto drop; | |
1056 | ||
1057 | if (!edev) | |
1058 | goto drop; | |
1059 | ||
ee9c88f2 JP |
1060 | skb = skb_share_check(skb, GFP_ATOMIC); |
1061 | if (skb == NULL) | |
1da177e4 LT |
1062 | return NET_RX_DROP; |
1063 | ||
1064 | if (!pskb_may_pull(skb, sizeof(struct ec_framehdr))) | |
1065 | goto drop; | |
1066 | ||
ee9c88f2 | 1067 | hdr = (struct ec_framehdr *)skb->data; |
1da177e4 LT |
1068 | |
1069 | /* First check for encapsulated IP */ | |
1070 | if (hdr->port == EC_PORT_IP) { | |
1071 | skb->protocol = htons(ETH_P_IP); | |
1072 | skb_pull(skb, sizeof(struct ec_framehdr)); | |
1073 | netif_rx(skb); | |
482d804c | 1074 | return NET_RX_SUCCESS; |
1da177e4 LT |
1075 | } |
1076 | ||
1077 | sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net); | |
1078 | if (!sk) | |
1079 | goto drop; | |
1080 | ||
1081 | if (ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb, | |
1082 | hdr->port)) | |
1083 | goto drop; | |
0c78a92f | 1084 | sock_put(sk); |
482d804c | 1085 | return NET_RX_SUCCESS; |
1da177e4 LT |
1086 | |
1087 | drop: | |
0c78a92f ED |
1088 | if (sk) |
1089 | sock_put(sk); | |
1da177e4 LT |
1090 | kfree_skb(skb); |
1091 | return NET_RX_DROP; | |
1092 | } | |
1093 | ||
7546dd97 | 1094 | static struct packet_type econet_packet_type __read_mostly = { |
ee9c88f2 JP |
1095 | .type = cpu_to_be16(ETH_P_ECONET), |
1096 | .func = econet_rcv, | |
1da177e4 LT |
1097 | }; |
1098 | ||
1099 | static void econet_hw_initialise(void) | |
1100 | { | |
1101 | dev_add_pack(&econet_packet_type); | |
1102 | } | |
1103 | ||
1104 | #endif | |
1105 | ||
ee9c88f2 JP |
1106 | static int econet_notifier(struct notifier_block *this, unsigned long msg, |
1107 | void *data) | |
1da177e4 | 1108 | { |
ee9c88f2 | 1109 | struct net_device *dev = data; |
1da177e4 LT |
1110 | struct ec_device *edev; |
1111 | ||
721499e8 | 1112 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
1113 | return NOTIFY_DONE; |
1114 | ||
1da177e4 LT |
1115 | switch (msg) { |
1116 | case NETDEV_UNREGISTER: | |
1117 | /* A device has gone down - kill any data we hold for it. */ | |
1118 | edev = dev->ec_ptr; | |
ee9c88f2 | 1119 | if (edev) { |
1da177e4 LT |
1120 | if (net2dev_map[0] == dev) |
1121 | net2dev_map[0] = NULL; | |
1122 | net2dev_map[edev->net] = NULL; | |
1123 | kfree(edev); | |
1124 | dev->ec_ptr = NULL; | |
1125 | } | |
1126 | break; | |
1127 | } | |
1128 | ||
1129 | return NOTIFY_DONE; | |
1130 | } | |
1131 | ||
1132 | static struct notifier_block econet_netdev_notifier = { | |
ee9c88f2 | 1133 | .notifier_call = econet_notifier, |
1da177e4 LT |
1134 | }; |
1135 | ||
1136 | static void __exit econet_proto_exit(void) | |
1137 | { | |
1138 | #ifdef CONFIG_ECONET_AUNUDP | |
1139 | del_timer(&ab_cleanup_timer); | |
1140 | if (udpsock) | |
1141 | sock_release(udpsock); | |
1142 | #endif | |
1143 | unregister_netdevice_notifier(&econet_netdev_notifier); | |
9c29a377 AD |
1144 | #ifdef CONFIG_ECONET_NATIVE |
1145 | dev_remove_pack(&econet_packet_type); | |
1146 | #endif | |
1da177e4 LT |
1147 | sock_unregister(econet_family_ops.family); |
1148 | proto_unregister(&econet_proto); | |
1149 | } | |
1150 | ||
1151 | static int __init econet_proto_init(void) | |
1152 | { | |
1153 | int err = proto_register(&econet_proto, 0); | |
1154 | ||
1155 | if (err != 0) | |
1156 | goto out; | |
1157 | sock_register(&econet_family_ops); | |
1158 | #ifdef CONFIG_ECONET_AUNUDP | |
1da177e4 LT |
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); |