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Commit | Line | Data |
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ee5d8f4d | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * G8BPQ compatible "AX.25 via ethernet" driver release 004 | |
4 | * | |
5 | * This code REQUIRES 2.0.0 or higher/ NET3.029 | |
6 | * | |
1da177e4 LT |
7 | * This is a "pseudo" network driver to allow AX.25 over Ethernet |
8 | * using G8BPQ encapsulation. It has been extracted from the protocol | |
9 | * implementation because | |
10 | * | |
11 | * - things got unreadable within the protocol stack | |
12 | * - to cure the protocol stack from "feature-ism" | |
13 | * - a protocol implementation shouldn't need to know on | |
14 | * which hardware it is running | |
15 | * - user-level programs like the AX.25 utilities shouldn't | |
16 | * need to know about the hardware. | |
17 | * - IP over ethernet encapsulated AX.25 was impossible | |
18 | * - rxecho.c did not work | |
19 | * - to have room for extensions | |
20 | * - it just deserves to "live" as an own driver | |
21 | * | |
22 | * This driver can use any ethernet destination address, and can be | |
23 | * limited to accept frames from one dedicated ethernet card only. | |
24 | * | |
25 | * Note that the driver sets up the BPQ devices automagically on | |
26 | * startup or (if started before the "insmod" of an ethernet device) | |
27 | * on "ifconfig up". It hopefully will remove the BPQ on "rmmod"ing | |
28 | * the ethernet device (in fact: as soon as another ethernet or bpq | |
29 | * device gets "ifconfig"ured). | |
30 | * | |
31 | * I have heard that several people are thinking of experiments | |
32 | * with highspeed packet radio using existing ethernet cards. | |
33 | * Well, this driver is prepared for this purpose, just add | |
34 | * your tx key control and a txdelay / tailtime algorithm, | |
35 | * probably some buffering, and /voila/... | |
36 | * | |
37 | * History | |
38 | * BPQ 001 Joerg(DL1BKE) Extracted BPQ code from AX.25 | |
39 | * protocol stack and added my own | |
40 | * yet existing patches | |
41 | * BPQ 002 Joerg(DL1BKE) Scan network device list on | |
42 | * startup. | |
43 | * BPQ 003 Joerg(DL1BKE) Ethernet destination address | |
44 | * and accepted source address | |
45 | * can be configured by an ioctl() | |
46 | * call. | |
47 | * Fixed to match Linux networking | |
48 | * changes - 2.1.15. | |
49 | * BPQ 004 Joerg(DL1BKE) Fixed to not lock up on ifconfig. | |
50 | */ | |
51 | ||
1da177e4 LT |
52 | #include <linux/errno.h> |
53 | #include <linux/types.h> | |
54 | #include <linux/socket.h> | |
55 | #include <linux/in.h> | |
56 | #include <linux/kernel.h> | |
57 | #include <linux/string.h> | |
58 | #include <linux/net.h> | |
5a0e3ad6 | 59 | #include <linux/slab.h> |
1da177e4 LT |
60 | #include <net/ax25.h> |
61 | #include <linux/inet.h> | |
62 | #include <linux/netdevice.h> | |
0795af57 | 63 | #include <linux/etherdevice.h> |
1da177e4 LT |
64 | #include <linux/if_arp.h> |
65 | #include <linux/skbuff.h> | |
66 | #include <net/sock.h> | |
7c0f6ba6 | 67 | #include <linux/uaccess.h> |
1da177e4 LT |
68 | #include <linux/mm.h> |
69 | #include <linux/interrupt.h> | |
70 | #include <linux/notifier.h> | |
71 | #include <linux/proc_fs.h> | |
72 | #include <linux/seq_file.h> | |
73 | #include <linux/stat.h> | |
1da177e4 LT |
74 | #include <linux/module.h> |
75 | #include <linux/init.h> | |
76 | #include <linux/rtnetlink.h> | |
77 | ||
78 | #include <net/ip.h> | |
79 | #include <net/arp.h> | |
457c4cbc | 80 | #include <net/net_namespace.h> |
1da177e4 LT |
81 | |
82 | #include <linux/bpqether.h> | |
83 | ||
afa8c78b | 84 | static const char banner[] __initconst = KERN_INFO \ |
eb33ae24 | 85 | "AX.25: bpqether driver version 004\n"; |
1da177e4 | 86 | |
f2ccd8fa | 87 | static int bpq_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); |
1da177e4 | 88 | static int bpq_device_event(struct notifier_block *, unsigned long, void *); |
1da177e4 | 89 | |
7546dd97 | 90 | static struct packet_type bpq_packet_type __read_mostly = { |
09640e63 | 91 | .type = cpu_to_be16(ETH_P_BPQ), |
1da177e4 LT |
92 | .func = bpq_rcv, |
93 | }; | |
94 | ||
95 | static struct notifier_block bpq_dev_notifier = { | |
351638e7 | 96 | .notifier_call = bpq_device_event, |
1da177e4 LT |
97 | }; |
98 | ||
99 | ||
100 | struct bpqdev { | |
101 | struct list_head bpq_list; /* list of bpq devices chain */ | |
102 | struct net_device *ethdev; /* link to ethernet device */ | |
103 | struct net_device *axdev; /* bpq device (bpq#) */ | |
1da177e4 LT |
104 | char dest_addr[6]; /* ether destination address */ |
105 | char acpt_addr[6]; /* accept ether frames from this address only */ | |
106 | }; | |
107 | ||
108 | static LIST_HEAD(bpq_devices); | |
109 | ||
1da177e4 LT |
110 | /* ------------------------------------------------------------------------ */ |
111 | ||
112 | ||
113 | /* | |
114 | * Get the ethernet device for a BPQ device | |
115 | */ | |
116 | static inline struct net_device *bpq_get_ether_dev(struct net_device *dev) | |
117 | { | |
118 | struct bpqdev *bpq = netdev_priv(dev); | |
119 | ||
120 | return bpq ? bpq->ethdev : NULL; | |
121 | } | |
122 | ||
123 | /* | |
124 | * Get the BPQ device for the ethernet device | |
125 | */ | |
126 | static inline struct net_device *bpq_get_ax25_dev(struct net_device *dev) | |
127 | { | |
128 | struct bpqdev *bpq; | |
129 | ||
95f59bf8 MB |
130 | list_for_each_entry_rcu(bpq, &bpq_devices, bpq_list, |
131 | lockdep_rtnl_is_held()) { | |
1da177e4 LT |
132 | if (bpq->ethdev == dev) |
133 | return bpq->axdev; | |
134 | } | |
135 | return NULL; | |
136 | } | |
137 | ||
138 | static inline int dev_is_ethdev(struct net_device *dev) | |
139 | { | |
807540ba | 140 | return dev->type == ARPHRD_ETHER && strncmp(dev->name, "dummy", 5); |
1da177e4 LT |
141 | } |
142 | ||
143 | /* ------------------------------------------------------------------------ */ | |
144 | ||
145 | ||
146 | /* | |
147 | * Receive an AX.25 frame via an ethernet interface. | |
148 | */ | |
f2ccd8fa | 149 | static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 LT |
150 | { |
151 | int len; | |
152 | char * ptr; | |
153 | struct ethhdr *eth; | |
154 | struct bpqdev *bpq; | |
155 | ||
09ad9bc7 | 156 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
157 | goto drop; |
158 | ||
1da177e4 LT |
159 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) |
160 | return NET_RX_DROP; | |
161 | ||
162 | if (!pskb_may_pull(skb, sizeof(struct ethhdr))) | |
163 | goto drop; | |
164 | ||
165 | rcu_read_lock(); | |
166 | dev = bpq_get_ax25_dev(dev); | |
167 | ||
168 | if (dev == NULL || !netif_running(dev)) | |
169 | goto drop_unlock; | |
170 | ||
171 | /* | |
172 | * if we want to accept frames from just one ethernet device | |
173 | * we check the source address of the sender. | |
174 | */ | |
175 | ||
176 | bpq = netdev_priv(dev); | |
177 | ||
178 | eth = eth_hdr(skb); | |
179 | ||
180 | if (!(bpq->acpt_addr[0] & 0x01) && | |
dc050c9e | 181 | !ether_addr_equal(eth->h_source, bpq->acpt_addr)) |
1da177e4 LT |
182 | goto drop_unlock; |
183 | ||
184 | if (skb_cow(skb, sizeof(struct ethhdr))) | |
185 | goto drop_unlock; | |
186 | ||
187 | len = skb->data[0] + skb->data[1] * 256 - 5; | |
188 | ||
189 | skb_pull(skb, 2); /* Remove the length bytes */ | |
190 | skb_trim(skb, len); /* Set the length of the data */ | |
191 | ||
f57505fd SH |
192 | dev->stats.rx_packets++; |
193 | dev->stats.rx_bytes += len; | |
1da177e4 LT |
194 | |
195 | ptr = skb_push(skb, 1); | |
196 | *ptr = 0; | |
197 | ||
56cb5156 | 198 | skb->protocol = ax25_type_trans(skb, dev); |
1da177e4 | 199 | netif_rx(skb); |
1da177e4 LT |
200 | unlock: |
201 | ||
202 | rcu_read_unlock(); | |
203 | ||
204 | return 0; | |
205 | drop_unlock: | |
206 | kfree_skb(skb); | |
207 | goto unlock; | |
208 | ||
209 | drop: | |
210 | kfree_skb(skb); | |
211 | return 0; | |
212 | } | |
213 | ||
214 | /* | |
215 | * Send an AX.25 frame via an ethernet interface | |
216 | */ | |
36e4d64a | 217 | static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev) |
1da177e4 | 218 | { |
1da177e4 LT |
219 | unsigned char *ptr; |
220 | struct bpqdev *bpq; | |
f65d1f08 | 221 | struct net_device *orig_dev; |
1da177e4 LT |
222 | int size; |
223 | ||
1d5da757 EB |
224 | if (skb->protocol == htons(ETH_P_IP)) |
225 | return ax25_ip_xmit(skb); | |
226 | ||
1da177e4 LT |
227 | /* |
228 | * Just to be *really* sure not to send anything if the interface | |
229 | * is down, the ethernet device may have gone. | |
230 | */ | |
231 | if (!netif_running(dev)) { | |
232 | kfree_skb(skb); | |
d77eeb70 | 233 | return NETDEV_TX_OK; |
1da177e4 LT |
234 | } |
235 | ||
3eb00275 | 236 | skb_pull(skb, 1); /* Drop KISS byte */ |
1da177e4 LT |
237 | size = skb->len; |
238 | ||
239 | /* | |
3eb00275 RB |
240 | * We're about to mess with the skb which may still shared with the |
241 | * generic networking code so unshare and ensure it's got enough | |
242 | * space for the BPQ headers. | |
1da177e4 | 243 | */ |
3eb00275 RB |
244 | if (skb_cow(skb, AX25_BPQ_HEADER_LEN)) { |
245 | if (net_ratelimit()) | |
246 | pr_err("bpqether: out of memory\n"); | |
1da177e4 | 247 | kfree_skb(skb); |
3eb00275 RB |
248 | |
249 | return NETDEV_TX_OK; | |
1da177e4 LT |
250 | } |
251 | ||
3eb00275 | 252 | ptr = skb_push(skb, 2); /* Make space for length */ |
1da177e4 LT |
253 | |
254 | *ptr++ = (size + 5) % 256; | |
255 | *ptr++ = (size + 5) / 256; | |
256 | ||
257 | bpq = netdev_priv(dev); | |
258 | ||
f65d1f08 | 259 | orig_dev = dev; |
1da177e4 | 260 | if ((dev = bpq_get_ether_dev(dev)) == NULL) { |
f65d1f08 | 261 | orig_dev->stats.tx_dropped++; |
1da177e4 | 262 | kfree_skb(skb); |
98ca4a46 | 263 | return NETDEV_TX_OK; |
1da177e4 LT |
264 | } |
265 | ||
56cb5156 | 266 | skb->protocol = ax25_type_trans(skb, dev); |
c1d2bbe1 | 267 | skb_reset_network_header(skb); |
0c4e8581 | 268 | dev_hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0); |
f57505fd SH |
269 | dev->stats.tx_packets++; |
270 | dev->stats.tx_bytes+=skb->len; | |
1da177e4 LT |
271 | |
272 | dev_queue_xmit(skb); | |
273 | netif_wake_queue(dev); | |
6ed10654 | 274 | return NETDEV_TX_OK; |
1da177e4 LT |
275 | } |
276 | ||
1da177e4 LT |
277 | /* |
278 | * Set AX.25 callsign | |
279 | */ | |
280 | static int bpq_set_mac_address(struct net_device *dev, void *addr) | |
281 | { | |
282 | struct sockaddr *sa = (struct sockaddr *)addr; | |
283 | ||
284 | memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | /* Ioctl commands | |
290 | * | |
291 | * SIOCSBPQETHOPT reserved for enhancements | |
292 | * SIOCSBPQETHADDR set the destination and accepted | |
293 | * source ethernet address (broadcast | |
294 | * or multicast: accept all) | |
295 | */ | |
296 | static int bpq_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
297 | { | |
298 | struct bpq_ethaddr __user *ethaddr = ifr->ifr_data; | |
299 | struct bpqdev *bpq = netdev_priv(dev); | |
300 | struct bpq_req req; | |
301 | ||
302 | if (!capable(CAP_NET_ADMIN)) | |
303 | return -EPERM; | |
304 | ||
305 | switch (cmd) { | |
306 | case SIOCSBPQETHOPT: | |
307 | if (copy_from_user(&req, ifr->ifr_data, sizeof(struct bpq_req))) | |
308 | return -EFAULT; | |
309 | switch (req.cmd) { | |
310 | case SIOCGBPQETHPARAM: | |
311 | case SIOCSBPQETHPARAM: | |
312 | default: | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | break; | |
317 | ||
318 | case SIOCSBPQETHADDR: | |
319 | if (copy_from_user(bpq->dest_addr, ethaddr->destination, ETH_ALEN)) | |
320 | return -EFAULT; | |
321 | if (copy_from_user(bpq->acpt_addr, ethaddr->accept, ETH_ALEN)) | |
322 | return -EFAULT; | |
323 | break; | |
324 | ||
325 | default: | |
326 | return -EINVAL; | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | /* | |
333 | * open/close a device | |
334 | */ | |
335 | static int bpq_open(struct net_device *dev) | |
336 | { | |
337 | netif_start_queue(dev); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static int bpq_close(struct net_device *dev) | |
342 | { | |
343 | netif_stop_queue(dev); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | ||
348 | /* ------------------------------------------------------------------------ */ | |
349 | ||
350 | ||
351 | /* | |
352 | * Proc filesystem | |
353 | */ | |
1da177e4 | 354 | static void *bpq_seq_start(struct seq_file *seq, loff_t *pos) |
e334f564 | 355 | __acquires(RCU) |
1da177e4 LT |
356 | { |
357 | int i = 1; | |
358 | struct bpqdev *bpqdev; | |
359 | ||
360 | rcu_read_lock(); | |
361 | ||
362 | if (*pos == 0) | |
363 | return SEQ_START_TOKEN; | |
364 | ||
bc0a7438 | 365 | list_for_each_entry_rcu(bpqdev, &bpq_devices, bpq_list) { |
1da177e4 LT |
366 | if (i == *pos) |
367 | return bpqdev; | |
368 | } | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | static void *bpq_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
373 | { | |
374 | struct list_head *p; | |
13707f9e | 375 | struct bpqdev *bpqdev = v; |
1da177e4 LT |
376 | |
377 | ++*pos; | |
378 | ||
379 | if (v == SEQ_START_TOKEN) | |
13707f9e | 380 | p = rcu_dereference(list_next_rcu(&bpq_devices)); |
1da177e4 | 381 | else |
13707f9e | 382 | p = rcu_dereference(list_next_rcu(&bpqdev->bpq_list)); |
1da177e4 LT |
383 | |
384 | return (p == &bpq_devices) ? NULL | |
b34bd06e | 385 | : list_entry(p, struct bpqdev, bpq_list); |
1da177e4 LT |
386 | } |
387 | ||
388 | static void bpq_seq_stop(struct seq_file *seq, void *v) | |
e334f564 | 389 | __releases(RCU) |
1da177e4 LT |
390 | { |
391 | rcu_read_unlock(); | |
392 | } | |
393 | ||
394 | ||
395 | static int bpq_seq_show(struct seq_file *seq, void *v) | |
396 | { | |
397 | if (v == SEQ_START_TOKEN) | |
398 | seq_puts(seq, | |
399 | "dev ether destination accept from\n"); | |
400 | else { | |
401 | const struct bpqdev *bpqdev = v; | |
402 | ||
e174961c | 403 | seq_printf(seq, "%-5s %-10s %pM ", |
1da177e4 | 404 | bpqdev->axdev->name, bpqdev->ethdev->name, |
e174961c | 405 | bpqdev->dest_addr); |
1da177e4 | 406 | |
0795af57 JP |
407 | if (is_multicast_ether_addr(bpqdev->acpt_addr)) |
408 | seq_printf(seq, "*\n"); | |
409 | else | |
e174961c | 410 | seq_printf(seq, "%pM\n", bpqdev->acpt_addr); |
1da177e4 LT |
411 | |
412 | } | |
413 | return 0; | |
414 | } | |
415 | ||
4101dec9 | 416 | static const struct seq_operations bpq_seqops = { |
1da177e4 LT |
417 | .start = bpq_seq_start, |
418 | .next = bpq_seq_next, | |
419 | .stop = bpq_seq_stop, | |
420 | .show = bpq_seq_show, | |
421 | }; | |
422 | ||
1da177e4 LT |
423 | /* ------------------------------------------------------------------------ */ |
424 | ||
283767e7 SH |
425 | static const struct net_device_ops bpq_netdev_ops = { |
426 | .ndo_open = bpq_open, | |
427 | .ndo_stop = bpq_close, | |
428 | .ndo_start_xmit = bpq_xmit, | |
429 | .ndo_set_mac_address = bpq_set_mac_address, | |
430 | .ndo_do_ioctl = bpq_ioctl, | |
431 | }; | |
1da177e4 LT |
432 | |
433 | static void bpq_setup(struct net_device *dev) | |
434 | { | |
283767e7 | 435 | dev->netdev_ops = &bpq_netdev_ops; |
cf124db5 | 436 | dev->needs_free_netdev = true; |
1da177e4 | 437 | |
15b1c0e8 RB |
438 | memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN); |
439 | memcpy(dev->dev_addr, &ax25_defaddr, AX25_ADDR_LEN); | |
1da177e4 LT |
440 | |
441 | dev->flags = 0; | |
aa43c5ff | 442 | dev->features = NETIF_F_LLTX; /* Allow recursion */ |
1da177e4 | 443 | |
5f94bebe | 444 | #if IS_ENABLED(CONFIG_AX25) |
3b04ddde | 445 | dev->header_ops = &ax25_header_ops; |
1da177e4 LT |
446 | #endif |
447 | ||
448 | dev->type = ARPHRD_AX25; | |
449 | dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; | |
450 | dev->mtu = AX25_DEF_PACLEN; | |
451 | dev->addr_len = AX25_ADDR_LEN; | |
452 | ||
453 | } | |
454 | ||
455 | /* | |
456 | * Setup a new device. | |
457 | */ | |
458 | static int bpq_new_device(struct net_device *edev) | |
459 | { | |
460 | int err; | |
461 | struct net_device *ndev; | |
462 | struct bpqdev *bpq; | |
463 | ||
c835a677 TG |
464 | ndev = alloc_netdev(sizeof(struct bpqdev), "bpq%d", NET_NAME_UNKNOWN, |
465 | bpq_setup); | |
1da177e4 LT |
466 | if (!ndev) |
467 | return -ENOMEM; | |
468 | ||
469 | ||
470 | bpq = netdev_priv(ndev); | |
471 | dev_hold(edev); | |
472 | bpq->ethdev = edev; | |
473 | bpq->axdev = ndev; | |
474 | ||
4e8439aa SA |
475 | eth_broadcast_addr(bpq->dest_addr); |
476 | eth_broadcast_addr(bpq->acpt_addr); | |
1da177e4 | 477 | |
1da177e4 LT |
478 | err = register_netdevice(ndev); |
479 | if (err) | |
480 | goto error; | |
481 | ||
482 | /* List protected by RTNL */ | |
483 | list_add_rcu(&bpq->bpq_list, &bpq_devices); | |
484 | return 0; | |
485 | ||
486 | error: | |
487 | dev_put(edev); | |
488 | free_netdev(ndev); | |
489 | return err; | |
490 | ||
491 | } | |
492 | ||
493 | static void bpq_free_device(struct net_device *ndev) | |
494 | { | |
495 | struct bpqdev *bpq = netdev_priv(ndev); | |
496 | ||
497 | dev_put(bpq->ethdev); | |
498 | list_del_rcu(&bpq->bpq_list); | |
499 | ||
500 | unregister_netdevice(ndev); | |
501 | } | |
502 | ||
503 | /* | |
504 | * Handle device status changes. | |
505 | */ | |
351638e7 JP |
506 | static int bpq_device_event(struct notifier_block *this, |
507 | unsigned long event, void *ptr) | |
1da177e4 | 508 | { |
351638e7 | 509 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
1da177e4 | 510 | |
09ad9bc7 | 511 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
512 | return NOTIFY_DONE; |
513 | ||
1da177e4 LT |
514 | if (!dev_is_ethdev(dev)) |
515 | return NOTIFY_DONE; | |
516 | ||
1da177e4 LT |
517 | switch (event) { |
518 | case NETDEV_UP: /* new ethernet device -> new BPQ interface */ | |
519 | if (bpq_get_ax25_dev(dev) == NULL) | |
520 | bpq_new_device(dev); | |
521 | break; | |
522 | ||
523 | case NETDEV_DOWN: /* ethernet device closed -> close BPQ interface */ | |
524 | if ((dev = bpq_get_ax25_dev(dev)) != NULL) | |
525 | dev_close(dev); | |
526 | break; | |
527 | ||
528 | case NETDEV_UNREGISTER: /* ethernet device removed -> free BPQ interface */ | |
529 | if ((dev = bpq_get_ax25_dev(dev)) != NULL) | |
530 | bpq_free_device(dev); | |
531 | break; | |
532 | default: | |
533 | break; | |
534 | } | |
1da177e4 LT |
535 | |
536 | return NOTIFY_DONE; | |
537 | } | |
538 | ||
539 | ||
540 | /* ------------------------------------------------------------------------ */ | |
541 | ||
542 | /* | |
543 | * Initialize driver. To be called from af_ax25 if not compiled as a | |
544 | * module | |
545 | */ | |
546 | static int __init bpq_init_driver(void) | |
547 | { | |
548 | #ifdef CONFIG_PROC_FS | |
fddda2b7 | 549 | if (!proc_create_seq("bpqether", 0444, init_net.proc_net, &bpq_seqops)) { |
1da177e4 LT |
550 | printk(KERN_ERR |
551 | "bpq: cannot create /proc/net/bpqether entry.\n"); | |
552 | return -ENOENT; | |
553 | } | |
554 | #endif /* CONFIG_PROC_FS */ | |
555 | ||
556 | dev_add_pack(&bpq_packet_type); | |
557 | ||
558 | register_netdevice_notifier(&bpq_dev_notifier); | |
559 | ||
560 | printk(banner); | |
561 | ||
562 | return 0; | |
563 | } | |
564 | ||
565 | static void __exit bpq_cleanup_driver(void) | |
566 | { | |
567 | struct bpqdev *bpq; | |
568 | ||
569 | dev_remove_pack(&bpq_packet_type); | |
570 | ||
571 | unregister_netdevice_notifier(&bpq_dev_notifier); | |
572 | ||
ece31ffd | 573 | remove_proc_entry("bpqether", init_net.proc_net); |
1da177e4 LT |
574 | |
575 | rtnl_lock(); | |
576 | while (!list_empty(&bpq_devices)) { | |
577 | bpq = list_entry(bpq_devices.next, struct bpqdev, bpq_list); | |
578 | bpq_free_device(bpq->axdev); | |
579 | } | |
580 | rtnl_unlock(); | |
581 | } | |
582 | ||
583 | MODULE_AUTHOR("Joerg Reuter DL1BKE <jreuter@yaina.de>"); | |
584 | MODULE_DESCRIPTION("Transmit and receive AX.25 packets over Ethernet"); | |
585 | MODULE_LICENSE("GPL"); | |
586 | module_init(bpq_init_driver); | |
587 | module_exit(bpq_cleanup_driver); |