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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * G8BPQ compatible "AX.25 via ethernet" driver release 004 | |
3 | * | |
4 | * This code REQUIRES 2.0.0 or higher/ NET3.029 | |
5 | * | |
6 | * This module: | |
7 | * This module is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This is a "pseudo" network driver to allow AX.25 over Ethernet | |
13 | * using G8BPQ encapsulation. It has been extracted from the protocol | |
14 | * implementation because | |
15 | * | |
16 | * - things got unreadable within the protocol stack | |
17 | * - to cure the protocol stack from "feature-ism" | |
18 | * - a protocol implementation shouldn't need to know on | |
19 | * which hardware it is running | |
20 | * - user-level programs like the AX.25 utilities shouldn't | |
21 | * need to know about the hardware. | |
22 | * - IP over ethernet encapsulated AX.25 was impossible | |
23 | * - rxecho.c did not work | |
24 | * - to have room for extensions | |
25 | * - it just deserves to "live" as an own driver | |
26 | * | |
27 | * This driver can use any ethernet destination address, and can be | |
28 | * limited to accept frames from one dedicated ethernet card only. | |
29 | * | |
30 | * Note that the driver sets up the BPQ devices automagically on | |
31 | * startup or (if started before the "insmod" of an ethernet device) | |
32 | * on "ifconfig up". It hopefully will remove the BPQ on "rmmod"ing | |
33 | * the ethernet device (in fact: as soon as another ethernet or bpq | |
34 | * device gets "ifconfig"ured). | |
35 | * | |
36 | * I have heard that several people are thinking of experiments | |
37 | * with highspeed packet radio using existing ethernet cards. | |
38 | * Well, this driver is prepared for this purpose, just add | |
39 | * your tx key control and a txdelay / tailtime algorithm, | |
40 | * probably some buffering, and /voila/... | |
41 | * | |
42 | * History | |
43 | * BPQ 001 Joerg(DL1BKE) Extracted BPQ code from AX.25 | |
44 | * protocol stack and added my own | |
45 | * yet existing patches | |
46 | * BPQ 002 Joerg(DL1BKE) Scan network device list on | |
47 | * startup. | |
48 | * BPQ 003 Joerg(DL1BKE) Ethernet destination address | |
49 | * and accepted source address | |
50 | * can be configured by an ioctl() | |
51 | * call. | |
52 | * Fixed to match Linux networking | |
53 | * changes - 2.1.15. | |
54 | * BPQ 004 Joerg(DL1BKE) Fixed to not lock up on ifconfig. | |
55 | */ | |
56 | ||
57 | #include <linux/config.h> | |
58 | #include <linux/errno.h> | |
59 | #include <linux/types.h> | |
60 | #include <linux/socket.h> | |
61 | #include <linux/in.h> | |
62 | #include <linux/kernel.h> | |
63 | #include <linux/string.h> | |
64 | #include <linux/net.h> | |
65 | #include <net/ax25.h> | |
66 | #include <linux/inet.h> | |
67 | #include <linux/netdevice.h> | |
68 | #include <linux/if_ether.h> | |
69 | #include <linux/if_arp.h> | |
70 | #include <linux/skbuff.h> | |
71 | #include <net/sock.h> | |
72 | #include <asm/system.h> | |
73 | #include <asm/uaccess.h> | |
74 | #include <linux/mm.h> | |
75 | #include <linux/interrupt.h> | |
76 | #include <linux/notifier.h> | |
77 | #include <linux/proc_fs.h> | |
78 | #include <linux/seq_file.h> | |
79 | #include <linux/stat.h> | |
80 | #include <linux/netfilter.h> | |
81 | #include <linux/module.h> | |
82 | #include <linux/init.h> | |
83 | #include <linux/rtnetlink.h> | |
84 | ||
85 | #include <net/ip.h> | |
86 | #include <net/arp.h> | |
87 | ||
88 | #include <linux/bpqether.h> | |
89 | ||
90 | static char banner[] __initdata = KERN_INFO "AX.25: bpqether driver version 004\n"; | |
91 | ||
92 | static unsigned char ax25_bcast[AX25_ADDR_LEN] = | |
93 | {'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1}; | |
94 | static unsigned char ax25_defaddr[AX25_ADDR_LEN] = | |
95 | {'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1}; | |
96 | ||
97 | static char bcast_addr[6]={0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; | |
98 | ||
99 | static char bpq_eth_addr[6]; | |
100 | ||
f2ccd8fa | 101 | static int bpq_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); |
1da177e4 LT |
102 | static int bpq_device_event(struct notifier_block *, unsigned long, void *); |
103 | static const char *bpq_print_ethaddr(const unsigned char *); | |
104 | ||
105 | static struct packet_type bpq_packet_type = { | |
106 | .type = __constant_htons(ETH_P_BPQ), | |
107 | .func = bpq_rcv, | |
108 | }; | |
109 | ||
110 | static struct notifier_block bpq_dev_notifier = { | |
111 | .notifier_call =bpq_device_event, | |
112 | }; | |
113 | ||
114 | ||
115 | struct bpqdev { | |
116 | struct list_head bpq_list; /* list of bpq devices chain */ | |
117 | struct net_device *ethdev; /* link to ethernet device */ | |
118 | struct net_device *axdev; /* bpq device (bpq#) */ | |
119 | struct net_device_stats stats; /* some statistics */ | |
120 | char dest_addr[6]; /* ether destination address */ | |
121 | char acpt_addr[6]; /* accept ether frames from this address only */ | |
122 | }; | |
123 | ||
124 | static LIST_HEAD(bpq_devices); | |
125 | ||
126 | ||
127 | /* ------------------------------------------------------------------------ */ | |
128 | ||
129 | ||
130 | /* | |
131 | * Get the ethernet device for a BPQ device | |
132 | */ | |
133 | static inline struct net_device *bpq_get_ether_dev(struct net_device *dev) | |
134 | { | |
135 | struct bpqdev *bpq = netdev_priv(dev); | |
136 | ||
137 | return bpq ? bpq->ethdev : NULL; | |
138 | } | |
139 | ||
140 | /* | |
141 | * Get the BPQ device for the ethernet device | |
142 | */ | |
143 | static inline struct net_device *bpq_get_ax25_dev(struct net_device *dev) | |
144 | { | |
145 | struct bpqdev *bpq; | |
146 | ||
147 | list_for_each_entry(bpq, &bpq_devices, bpq_list) { | |
148 | if (bpq->ethdev == dev) | |
149 | return bpq->axdev; | |
150 | } | |
151 | return NULL; | |
152 | } | |
153 | ||
154 | static inline int dev_is_ethdev(struct net_device *dev) | |
155 | { | |
156 | return ( | |
157 | dev->type == ARPHRD_ETHER | |
158 | && strncmp(dev->name, "dummy", 5) | |
159 | ); | |
160 | } | |
161 | ||
162 | /* ------------------------------------------------------------------------ */ | |
163 | ||
164 | ||
165 | /* | |
166 | * Receive an AX.25 frame via an ethernet interface. | |
167 | */ | |
f2ccd8fa | 168 | static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 LT |
169 | { |
170 | int len; | |
171 | char * ptr; | |
172 | struct ethhdr *eth; | |
173 | struct bpqdev *bpq; | |
174 | ||
175 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
176 | return NET_RX_DROP; | |
177 | ||
178 | if (!pskb_may_pull(skb, sizeof(struct ethhdr))) | |
179 | goto drop; | |
180 | ||
181 | rcu_read_lock(); | |
182 | dev = bpq_get_ax25_dev(dev); | |
183 | ||
184 | if (dev == NULL || !netif_running(dev)) | |
185 | goto drop_unlock; | |
186 | ||
187 | /* | |
188 | * if we want to accept frames from just one ethernet device | |
189 | * we check the source address of the sender. | |
190 | */ | |
191 | ||
192 | bpq = netdev_priv(dev); | |
193 | ||
194 | eth = eth_hdr(skb); | |
195 | ||
196 | if (!(bpq->acpt_addr[0] & 0x01) && | |
197 | memcmp(eth->h_source, bpq->acpt_addr, ETH_ALEN)) | |
198 | goto drop_unlock; | |
199 | ||
200 | if (skb_cow(skb, sizeof(struct ethhdr))) | |
201 | goto drop_unlock; | |
202 | ||
203 | len = skb->data[0] + skb->data[1] * 256 - 5; | |
204 | ||
205 | skb_pull(skb, 2); /* Remove the length bytes */ | |
206 | skb_trim(skb, len); /* Set the length of the data */ | |
207 | ||
208 | bpq->stats.rx_packets++; | |
209 | bpq->stats.rx_bytes += len; | |
210 | ||
211 | ptr = skb_push(skb, 1); | |
212 | *ptr = 0; | |
213 | ||
56cb5156 | 214 | skb->protocol = ax25_type_trans(skb, dev); |
1da177e4 LT |
215 | netif_rx(skb); |
216 | dev->last_rx = jiffies; | |
217 | unlock: | |
218 | ||
219 | rcu_read_unlock(); | |
220 | ||
221 | return 0; | |
222 | drop_unlock: | |
223 | kfree_skb(skb); | |
224 | goto unlock; | |
225 | ||
226 | drop: | |
227 | kfree_skb(skb); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | /* | |
232 | * Send an AX.25 frame via an ethernet interface | |
233 | */ | |
234 | static int bpq_xmit(struct sk_buff *skb, struct net_device *dev) | |
235 | { | |
236 | struct sk_buff *newskb; | |
237 | unsigned char *ptr; | |
238 | struct bpqdev *bpq; | |
239 | int size; | |
240 | ||
241 | /* | |
242 | * Just to be *really* sure not to send anything if the interface | |
243 | * is down, the ethernet device may have gone. | |
244 | */ | |
245 | if (!netif_running(dev)) { | |
246 | kfree_skb(skb); | |
247 | return -ENODEV; | |
248 | } | |
249 | ||
250 | skb_pull(skb, 1); | |
251 | size = skb->len; | |
252 | ||
253 | /* | |
254 | * The AX.25 code leaves enough room for the ethernet header, but | |
255 | * sendto() does not. | |
256 | */ | |
257 | if (skb_headroom(skb) < AX25_BPQ_HEADER_LEN) { /* Ough! */ | |
258 | if ((newskb = skb_realloc_headroom(skb, AX25_BPQ_HEADER_LEN)) == NULL) { | |
259 | printk(KERN_WARNING "bpqether: out of memory\n"); | |
260 | kfree_skb(skb); | |
261 | return -ENOMEM; | |
262 | } | |
263 | ||
264 | if (skb->sk != NULL) | |
265 | skb_set_owner_w(newskb, skb->sk); | |
266 | ||
267 | kfree_skb(skb); | |
268 | skb = newskb; | |
269 | } | |
270 | ||
1da177e4 LT |
271 | ptr = skb_push(skb, 2); |
272 | ||
273 | *ptr++ = (size + 5) % 256; | |
274 | *ptr++ = (size + 5) / 256; | |
275 | ||
276 | bpq = netdev_priv(dev); | |
277 | ||
278 | if ((dev = bpq_get_ether_dev(dev)) == NULL) { | |
279 | bpq->stats.tx_dropped++; | |
280 | kfree_skb(skb); | |
281 | return -ENODEV; | |
282 | } | |
283 | ||
56cb5156 | 284 | skb->protocol = ax25_type_trans(skb, dev); |
1da177e4 LT |
285 | skb->nh.raw = skb->data; |
286 | dev->hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0); | |
287 | bpq->stats.tx_packets++; | |
288 | bpq->stats.tx_bytes+=skb->len; | |
289 | ||
290 | dev_queue_xmit(skb); | |
291 | netif_wake_queue(dev); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | /* | |
296 | * Statistics | |
297 | */ | |
298 | static struct net_device_stats *bpq_get_stats(struct net_device *dev) | |
299 | { | |
300 | struct bpqdev *bpq = netdev_priv(dev); | |
301 | ||
302 | return &bpq->stats; | |
303 | } | |
304 | ||
305 | /* | |
306 | * Set AX.25 callsign | |
307 | */ | |
308 | static int bpq_set_mac_address(struct net_device *dev, void *addr) | |
309 | { | |
310 | struct sockaddr *sa = (struct sockaddr *)addr; | |
311 | ||
312 | memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | /* Ioctl commands | |
318 | * | |
319 | * SIOCSBPQETHOPT reserved for enhancements | |
320 | * SIOCSBPQETHADDR set the destination and accepted | |
321 | * source ethernet address (broadcast | |
322 | * or multicast: accept all) | |
323 | */ | |
324 | static int bpq_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
325 | { | |
326 | struct bpq_ethaddr __user *ethaddr = ifr->ifr_data; | |
327 | struct bpqdev *bpq = netdev_priv(dev); | |
328 | struct bpq_req req; | |
329 | ||
330 | if (!capable(CAP_NET_ADMIN)) | |
331 | return -EPERM; | |
332 | ||
333 | switch (cmd) { | |
334 | case SIOCSBPQETHOPT: | |
335 | if (copy_from_user(&req, ifr->ifr_data, sizeof(struct bpq_req))) | |
336 | return -EFAULT; | |
337 | switch (req.cmd) { | |
338 | case SIOCGBPQETHPARAM: | |
339 | case SIOCSBPQETHPARAM: | |
340 | default: | |
341 | return -EINVAL; | |
342 | } | |
343 | ||
344 | break; | |
345 | ||
346 | case SIOCSBPQETHADDR: | |
347 | if (copy_from_user(bpq->dest_addr, ethaddr->destination, ETH_ALEN)) | |
348 | return -EFAULT; | |
349 | if (copy_from_user(bpq->acpt_addr, ethaddr->accept, ETH_ALEN)) | |
350 | return -EFAULT; | |
351 | break; | |
352 | ||
353 | default: | |
354 | return -EINVAL; | |
355 | } | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | /* | |
361 | * open/close a device | |
362 | */ | |
363 | static int bpq_open(struct net_device *dev) | |
364 | { | |
365 | netif_start_queue(dev); | |
366 | return 0; | |
367 | } | |
368 | ||
369 | static int bpq_close(struct net_device *dev) | |
370 | { | |
371 | netif_stop_queue(dev); | |
372 | return 0; | |
373 | } | |
374 | ||
375 | ||
376 | /* ------------------------------------------------------------------------ */ | |
377 | ||
378 | ||
379 | /* | |
380 | * Proc filesystem | |
381 | */ | |
382 | static const char * bpq_print_ethaddr(const unsigned char *e) | |
383 | { | |
384 | static char buf[18]; | |
385 | ||
386 | sprintf(buf, "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X", | |
387 | e[0], e[1], e[2], e[3], e[4], e[5]); | |
388 | ||
389 | return buf; | |
390 | } | |
391 | ||
392 | static void *bpq_seq_start(struct seq_file *seq, loff_t *pos) | |
393 | { | |
394 | int i = 1; | |
395 | struct bpqdev *bpqdev; | |
396 | ||
397 | rcu_read_lock(); | |
398 | ||
399 | if (*pos == 0) | |
400 | return SEQ_START_TOKEN; | |
401 | ||
402 | list_for_each_entry(bpqdev, &bpq_devices, bpq_list) { | |
403 | if (i == *pos) | |
404 | return bpqdev; | |
405 | } | |
406 | return NULL; | |
407 | } | |
408 | ||
409 | static void *bpq_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
410 | { | |
411 | struct list_head *p; | |
412 | ||
413 | ++*pos; | |
414 | ||
415 | if (v == SEQ_START_TOKEN) | |
416 | p = bpq_devices.next; | |
417 | else | |
418 | p = ((struct bpqdev *)v)->bpq_list.next; | |
419 | ||
420 | return (p == &bpq_devices) ? NULL | |
421 | : list_entry(p, struct bpqdev, bpq_list); | |
422 | } | |
423 | ||
424 | static void bpq_seq_stop(struct seq_file *seq, void *v) | |
425 | { | |
426 | rcu_read_unlock(); | |
427 | } | |
428 | ||
429 | ||
430 | static int bpq_seq_show(struct seq_file *seq, void *v) | |
431 | { | |
432 | if (v == SEQ_START_TOKEN) | |
433 | seq_puts(seq, | |
434 | "dev ether destination accept from\n"); | |
435 | else { | |
436 | const struct bpqdev *bpqdev = v; | |
437 | ||
438 | seq_printf(seq, "%-5s %-10s %s ", | |
439 | bpqdev->axdev->name, bpqdev->ethdev->name, | |
440 | bpq_print_ethaddr(bpqdev->dest_addr)); | |
441 | ||
442 | seq_printf(seq, "%s\n", | |
443 | (bpqdev->acpt_addr[0] & 0x01) ? "*" | |
444 | : bpq_print_ethaddr(bpqdev->acpt_addr)); | |
445 | ||
446 | } | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static struct seq_operations bpq_seqops = { | |
451 | .start = bpq_seq_start, | |
452 | .next = bpq_seq_next, | |
453 | .stop = bpq_seq_stop, | |
454 | .show = bpq_seq_show, | |
455 | }; | |
456 | ||
457 | static int bpq_info_open(struct inode *inode, struct file *file) | |
458 | { | |
459 | return seq_open(file, &bpq_seqops); | |
460 | } | |
461 | ||
462 | static struct file_operations bpq_info_fops = { | |
463 | .owner = THIS_MODULE, | |
464 | .open = bpq_info_open, | |
465 | .read = seq_read, | |
466 | .llseek = seq_lseek, | |
467 | .release = seq_release, | |
468 | }; | |
469 | ||
470 | ||
471 | /* ------------------------------------------------------------------------ */ | |
472 | ||
473 | ||
474 | static void bpq_setup(struct net_device *dev) | |
475 | { | |
476 | ||
477 | dev->hard_start_xmit = bpq_xmit; | |
478 | dev->open = bpq_open; | |
479 | dev->stop = bpq_close; | |
480 | dev->set_mac_address = bpq_set_mac_address; | |
481 | dev->get_stats = bpq_get_stats; | |
482 | dev->do_ioctl = bpq_ioctl; | |
483 | dev->destructor = free_netdev; | |
484 | ||
485 | memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN); | |
486 | memcpy(dev->dev_addr, ax25_defaddr, AX25_ADDR_LEN); | |
487 | ||
488 | dev->flags = 0; | |
489 | ||
490 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
491 | dev->hard_header = ax25_encapsulate; | |
492 | dev->rebuild_header = ax25_rebuild_header; | |
493 | #endif | |
494 | ||
495 | dev->type = ARPHRD_AX25; | |
496 | dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; | |
497 | dev->mtu = AX25_DEF_PACLEN; | |
498 | dev->addr_len = AX25_ADDR_LEN; | |
499 | ||
500 | } | |
501 | ||
502 | /* | |
503 | * Setup a new device. | |
504 | */ | |
505 | static int bpq_new_device(struct net_device *edev) | |
506 | { | |
507 | int err; | |
508 | struct net_device *ndev; | |
509 | struct bpqdev *bpq; | |
510 | ||
511 | ndev = alloc_netdev(sizeof(struct bpqdev), "bpq%d", | |
512 | bpq_setup); | |
513 | if (!ndev) | |
514 | return -ENOMEM; | |
515 | ||
516 | ||
517 | bpq = netdev_priv(ndev); | |
518 | dev_hold(edev); | |
519 | bpq->ethdev = edev; | |
520 | bpq->axdev = ndev; | |
521 | ||
522 | memcpy(bpq->dest_addr, bcast_addr, sizeof(bpq_eth_addr)); | |
523 | memcpy(bpq->acpt_addr, bcast_addr, sizeof(bpq_eth_addr)); | |
524 | ||
525 | err = dev_alloc_name(ndev, ndev->name); | |
526 | if (err < 0) | |
527 | goto error; | |
528 | ||
529 | err = register_netdevice(ndev); | |
530 | if (err) | |
531 | goto error; | |
532 | ||
533 | /* List protected by RTNL */ | |
534 | list_add_rcu(&bpq->bpq_list, &bpq_devices); | |
535 | return 0; | |
536 | ||
537 | error: | |
538 | dev_put(edev); | |
539 | free_netdev(ndev); | |
540 | return err; | |
541 | ||
542 | } | |
543 | ||
544 | static void bpq_free_device(struct net_device *ndev) | |
545 | { | |
546 | struct bpqdev *bpq = netdev_priv(ndev); | |
547 | ||
548 | dev_put(bpq->ethdev); | |
549 | list_del_rcu(&bpq->bpq_list); | |
550 | ||
551 | unregister_netdevice(ndev); | |
552 | } | |
553 | ||
554 | /* | |
555 | * Handle device status changes. | |
556 | */ | |
557 | static int bpq_device_event(struct notifier_block *this,unsigned long event, void *ptr) | |
558 | { | |
559 | struct net_device *dev = (struct net_device *)ptr; | |
560 | ||
561 | if (!dev_is_ethdev(dev)) | |
562 | return NOTIFY_DONE; | |
563 | ||
564 | rcu_read_lock(); | |
565 | ||
566 | switch (event) { | |
567 | case NETDEV_UP: /* new ethernet device -> new BPQ interface */ | |
568 | if (bpq_get_ax25_dev(dev) == NULL) | |
569 | bpq_new_device(dev); | |
570 | break; | |
571 | ||
572 | case NETDEV_DOWN: /* ethernet device closed -> close BPQ interface */ | |
573 | if ((dev = bpq_get_ax25_dev(dev)) != NULL) | |
574 | dev_close(dev); | |
575 | break; | |
576 | ||
577 | case NETDEV_UNREGISTER: /* ethernet device removed -> free BPQ interface */ | |
578 | if ((dev = bpq_get_ax25_dev(dev)) != NULL) | |
579 | bpq_free_device(dev); | |
580 | break; | |
581 | default: | |
582 | break; | |
583 | } | |
584 | rcu_read_unlock(); | |
585 | ||
586 | return NOTIFY_DONE; | |
587 | } | |
588 | ||
589 | ||
590 | /* ------------------------------------------------------------------------ */ | |
591 | ||
592 | /* | |
593 | * Initialize driver. To be called from af_ax25 if not compiled as a | |
594 | * module | |
595 | */ | |
596 | static int __init bpq_init_driver(void) | |
597 | { | |
598 | #ifdef CONFIG_PROC_FS | |
599 | if (!proc_net_fops_create("bpqether", S_IRUGO, &bpq_info_fops)) { | |
600 | printk(KERN_ERR | |
601 | "bpq: cannot create /proc/net/bpqether entry.\n"); | |
602 | return -ENOENT; | |
603 | } | |
604 | #endif /* CONFIG_PROC_FS */ | |
605 | ||
606 | dev_add_pack(&bpq_packet_type); | |
607 | ||
608 | register_netdevice_notifier(&bpq_dev_notifier); | |
609 | ||
610 | printk(banner); | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | static void __exit bpq_cleanup_driver(void) | |
616 | { | |
617 | struct bpqdev *bpq; | |
618 | ||
619 | dev_remove_pack(&bpq_packet_type); | |
620 | ||
621 | unregister_netdevice_notifier(&bpq_dev_notifier); | |
622 | ||
623 | proc_net_remove("bpqether"); | |
624 | ||
625 | rtnl_lock(); | |
626 | while (!list_empty(&bpq_devices)) { | |
627 | bpq = list_entry(bpq_devices.next, struct bpqdev, bpq_list); | |
628 | bpq_free_device(bpq->axdev); | |
629 | } | |
630 | rtnl_unlock(); | |
631 | } | |
632 | ||
633 | MODULE_AUTHOR("Joerg Reuter DL1BKE <jreuter@yaina.de>"); | |
634 | MODULE_DESCRIPTION("Transmit and receive AX.25 packets over Ethernet"); | |
635 | MODULE_LICENSE("GPL"); | |
636 | module_init(bpq_init_driver); | |
637 | module_exit(bpq_cleanup_driver); |