Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /** -*- linux-c -*- *********************************************************** |
2 | * Linux PPP over Ethernet (PPPoX/PPPoE) Sockets | |
3 | * | |
4 | * PPPoX --- Generic PPP encapsulation socket family | |
5 | * PPPoE --- PPP over Ethernet (RFC 2516) | |
6 | * | |
7 | * | |
8 | * Version: 0.7.0 | |
9 | * | |
90719dbe FZ |
10 | * 070228 : Fix to allow multiple sessions with same remote MAC and same |
11 | * session id by including the local device ifindex in the | |
12 | * tuple identifying a session. This also ensures packets can't | |
13 | * be injected into a session from interfaces other than the one | |
14 | * specified by userspace. Florian Zumbiehl <florz@florz.de> | |
15 | * (Oh, BTW, this one is YYMMDD, in case you were wondering ...) | |
1da177e4 LT |
16 | * 220102 : Fix module use count on failure in pppoe_create, pppox_sk -acme |
17 | * 030700 : Fixed connect logic to allow for disconnect. | |
18 | * 270700 : Fixed potential SMP problems; we must protect against | |
19 | * simultaneous invocation of ppp_input | |
20 | * and ppp_unregister_channel. | |
21 | * 040800 : Respect reference count mechanisms on net-devices. | |
22 | * 200800 : fix kfree(skb) in pppoe_rcv (acme) | |
23 | * Module reference count is decremented in the right spot now, | |
24 | * guards against sock_put not actually freeing the sk | |
25 | * in pppoe_release. | |
26 | * 051000 : Initialization cleanup. | |
27 | * 111100 : Fix recvmsg. | |
28 | * 050101 : Fix PADT procesing. | |
29 | * 140501 : Use pppoe_rcv_core to handle all backlog. (Alexey) | |
30 | * 170701 : Do not lock_sock with rwlock held. (DaveM) | |
31 | * Ignore discovery frames if user has socket | |
32 | * locked. (DaveM) | |
33 | * Ignore return value of dev_queue_xmit in __pppoe_xmit | |
34 | * or else we may kfree an SKB twice. (DaveM) | |
35 | * 190701 : When doing copies of skb's in __pppoe_xmit, always delete | |
36 | * the original skb that was passed in on success, never on | |
37 | * failure. Delete the copy of the skb on failure to avoid | |
38 | * a memory leak. | |
39 | * 081001 : Misc. cleanup (licence string, non-blocking, prevent | |
40 | * reference of device on close). | |
41 | * 121301 : New ppp channels interface; cannot unregister a channel | |
42 | * from interrupts. Thus, we mark the socket as a ZOMBIE | |
43 | * and do the unregistration later. | |
44 | * 081002 : seq_file support for proc stuff -acme | |
45 | * 111602 : Merge all 2.4 fixes into 2.5/2.6 tree. Label 2.5/2.6 | |
46 | * as version 0.7. Spacing cleanup. | |
47 | * Author: Michal Ostrowski <mostrows@speakeasy.net> | |
48 | * Contributors: | |
49 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
50 | * David S. Miller (davem@redhat.com) | |
51 | * | |
52 | * License: | |
53 | * This program is free software; you can redistribute it and/or | |
54 | * modify it under the terms of the GNU General Public License | |
55 | * as published by the Free Software Foundation; either version | |
56 | * 2 of the License, or (at your option) any later version. | |
57 | * | |
58 | */ | |
59 | ||
60 | #include <linux/string.h> | |
61 | #include <linux/module.h> | |
62 | #include <linux/kernel.h> | |
63 | #include <linux/slab.h> | |
64 | #include <linux/errno.h> | |
65 | #include <linux/netdevice.h> | |
66 | #include <linux/net.h> | |
67 | #include <linux/inetdevice.h> | |
68 | #include <linux/etherdevice.h> | |
69 | #include <linux/skbuff.h> | |
70 | #include <linux/init.h> | |
71 | #include <linux/if_ether.h> | |
72 | #include <linux/if_pppox.h> | |
73 | #include <linux/ppp_channel.h> | |
74 | #include <linux/ppp_defs.h> | |
75 | #include <linux/if_ppp.h> | |
76 | #include <linux/notifier.h> | |
77 | #include <linux/file.h> | |
78 | #include <linux/proc_fs.h> | |
79 | #include <linux/seq_file.h> | |
80 | ||
81 | #include <net/sock.h> | |
82 | ||
83 | #include <asm/uaccess.h> | |
84 | ||
85 | #define PPPOE_HASH_BITS 4 | |
86 | #define PPPOE_HASH_SIZE (1<<PPPOE_HASH_BITS) | |
87 | ||
88 | static struct ppp_channel_ops pppoe_chan_ops; | |
89 | ||
90 | static int pppoe_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
91 | static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb); | |
92 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb); | |
93 | ||
17ba15fb | 94 | static const struct proto_ops pppoe_ops; |
1da177e4 LT |
95 | static DEFINE_RWLOCK(pppoe_hash_lock); |
96 | ||
97 | static struct ppp_channel_ops pppoe_chan_ops; | |
98 | ||
99 | static inline int cmp_2_addr(struct pppoe_addr *a, struct pppoe_addr *b) | |
100 | { | |
101 | return (a->sid == b->sid && | |
102 | (memcmp(a->remote, b->remote, ETH_ALEN) == 0)); | |
103 | } | |
104 | ||
105 | static inline int cmp_addr(struct pppoe_addr *a, unsigned long sid, char *addr) | |
106 | { | |
107 | return (a->sid == sid && | |
108 | (memcmp(a->remote,addr,ETH_ALEN) == 0)); | |
109 | } | |
110 | ||
f1543f8b FZ |
111 | #if 8%PPPOE_HASH_BITS |
112 | #error 8 must be a multiple of PPPOE_HASH_BITS | |
113 | #endif | |
114 | ||
115 | static int hash_item(unsigned int sid, unsigned char *addr) | |
1da177e4 | 116 | { |
f1543f8b FZ |
117 | unsigned char hash = 0; |
118 | unsigned int i; | |
1da177e4 | 119 | |
f1543f8b FZ |
120 | for (i = 0 ; i < ETH_ALEN ; i++) { |
121 | hash ^= addr[i]; | |
122 | } | |
123 | for (i = 0 ; i < sizeof(sid_t)*8 ; i += 8 ){ | |
124 | hash ^= sid>>i; | |
125 | } | |
126 | for (i = 8 ; (i>>=1) >= PPPOE_HASH_BITS ; ) { | |
127 | hash ^= hash>>i; | |
1da177e4 | 128 | } |
1da177e4 LT |
129 | |
130 | return hash & ( PPPOE_HASH_SIZE - 1 ); | |
131 | } | |
132 | ||
133 | /* zeroed because its in .bss */ | |
134 | static struct pppox_sock *item_hash_table[PPPOE_HASH_SIZE]; | |
135 | ||
136 | /********************************************************************** | |
137 | * | |
138 | * Set/get/delete/rehash items (internal versions) | |
139 | * | |
140 | **********************************************************************/ | |
90719dbe | 141 | static struct pppox_sock *__get_item(unsigned long sid, unsigned char *addr, int ifindex) |
1da177e4 LT |
142 | { |
143 | int hash = hash_item(sid, addr); | |
144 | struct pppox_sock *ret; | |
145 | ||
146 | ret = item_hash_table[hash]; | |
147 | ||
6f30e186 | 148 | while (ret && !(cmp_addr(&ret->pppoe_pa, sid, addr) && ret->pppoe_ifindex == ifindex)) |
1da177e4 LT |
149 | ret = ret->next; |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
154 | static int __set_item(struct pppox_sock *po) | |
155 | { | |
156 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); | |
157 | struct pppox_sock *ret; | |
158 | ||
159 | ret = item_hash_table[hash]; | |
160 | while (ret) { | |
6f30e186 | 161 | if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) && ret->pppoe_ifindex == po->pppoe_ifindex) |
1da177e4 LT |
162 | return -EALREADY; |
163 | ||
164 | ret = ret->next; | |
165 | } | |
166 | ||
90719dbe FZ |
167 | po->next = item_hash_table[hash]; |
168 | item_hash_table[hash] = po; | |
1da177e4 LT |
169 | |
170 | return 0; | |
171 | } | |
172 | ||
90719dbe | 173 | static struct pppox_sock *__delete_item(unsigned long sid, char *addr, int ifindex) |
1da177e4 LT |
174 | { |
175 | int hash = hash_item(sid, addr); | |
176 | struct pppox_sock *ret, **src; | |
177 | ||
178 | ret = item_hash_table[hash]; | |
179 | src = &item_hash_table[hash]; | |
180 | ||
181 | while (ret) { | |
6f30e186 | 182 | if (cmp_addr(&ret->pppoe_pa, sid, addr) && ret->pppoe_ifindex == ifindex) { |
1da177e4 LT |
183 | *src = ret->next; |
184 | break; | |
185 | } | |
186 | ||
187 | src = &ret->next; | |
188 | ret = ret->next; | |
189 | } | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | /********************************************************************** | |
195 | * | |
196 | * Set/get/delete/rehash items | |
197 | * | |
198 | **********************************************************************/ | |
199 | static inline struct pppox_sock *get_item(unsigned long sid, | |
90719dbe | 200 | unsigned char *addr, int ifindex) |
1da177e4 LT |
201 | { |
202 | struct pppox_sock *po; | |
203 | ||
204 | read_lock_bh(&pppoe_hash_lock); | |
90719dbe | 205 | po = __get_item(sid, addr, ifindex); |
1da177e4 LT |
206 | if (po) |
207 | sock_hold(sk_pppox(po)); | |
208 | read_unlock_bh(&pppoe_hash_lock); | |
209 | ||
210 | return po; | |
211 | } | |
212 | ||
213 | static inline struct pppox_sock *get_item_by_addr(struct sockaddr_pppox *sp) | |
214 | { | |
bfafb26e | 215 | struct net_device *dev; |
90719dbe FZ |
216 | int ifindex; |
217 | ||
218 | dev = dev_get_by_name(sp->sa_addr.pppoe.dev); | |
219 | if(!dev) | |
220 | return NULL; | |
221 | ifindex = dev->ifindex; | |
222 | dev_put(dev); | |
223 | return get_item(sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote, ifindex); | |
1da177e4 LT |
224 | } |
225 | ||
90719dbe | 226 | static inline struct pppox_sock *delete_item(unsigned long sid, char *addr, int ifindex) |
1da177e4 LT |
227 | { |
228 | struct pppox_sock *ret; | |
229 | ||
230 | write_lock_bh(&pppoe_hash_lock); | |
90719dbe | 231 | ret = __delete_item(sid, addr, ifindex); |
1da177e4 LT |
232 | write_unlock_bh(&pppoe_hash_lock); |
233 | ||
234 | return ret; | |
235 | } | |
236 | ||
237 | ||
238 | ||
239 | /*************************************************************************** | |
240 | * | |
241 | * Handler for device events. | |
242 | * Certain device events require that sockets be unconnected. | |
243 | * | |
244 | **************************************************************************/ | |
245 | ||
246 | static void pppoe_flush_dev(struct net_device *dev) | |
247 | { | |
248 | int hash; | |
1da177e4 LT |
249 | BUG_ON(dev == NULL); |
250 | ||
42dc9cd5 | 251 | write_lock_bh(&pppoe_hash_lock); |
1da177e4 LT |
252 | for (hash = 0; hash < PPPOE_HASH_SIZE; hash++) { |
253 | struct pppox_sock *po = item_hash_table[hash]; | |
254 | ||
255 | while (po != NULL) { | |
42dc9cd5 MO |
256 | struct sock *sk = sk_pppox(po); |
257 | if (po->pppoe_dev != dev) { | |
258 | po = po->next; | |
259 | continue; | |
260 | } | |
261 | po->pppoe_dev = NULL; | |
262 | dev_put(dev); | |
1da177e4 | 263 | |
1da177e4 | 264 | |
42dc9cd5 MO |
265 | /* We always grab the socket lock, followed by the |
266 | * pppoe_hash_lock, in that order. Since we should | |
267 | * hold the sock lock while doing any unbinding, | |
268 | * we need to release the lock we're holding. | |
269 | * Hold a reference to the sock so it doesn't disappear | |
270 | * as we're jumping between locks. | |
271 | */ | |
1da177e4 | 272 | |
42dc9cd5 | 273 | sock_hold(sk); |
1da177e4 | 274 | |
42dc9cd5 MO |
275 | write_unlock_bh(&pppoe_hash_lock); |
276 | lock_sock(sk); | |
1da177e4 | 277 | |
42dc9cd5 MO |
278 | if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) { |
279 | pppox_unbind_sock(sk); | |
280 | sk->sk_state = PPPOX_ZOMBIE; | |
281 | sk->sk_state_change(sk); | |
282 | } | |
1da177e4 | 283 | |
42dc9cd5 MO |
284 | release_sock(sk); |
285 | sock_put(sk); | |
1da177e4 | 286 | |
42dc9cd5 MO |
287 | /* Restart scan at the beginning of this hash chain. |
288 | * While the lock was dropped the chain contents may | |
289 | * have changed. | |
290 | */ | |
291 | write_lock_bh(&pppoe_hash_lock); | |
292 | po = item_hash_table[hash]; | |
1da177e4 LT |
293 | } |
294 | } | |
42dc9cd5 | 295 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 LT |
296 | } |
297 | ||
298 | static int pppoe_device_event(struct notifier_block *this, | |
299 | unsigned long event, void *ptr) | |
300 | { | |
301 | struct net_device *dev = (struct net_device *) ptr; | |
302 | ||
303 | /* Only look at sockets that are using this specific device. */ | |
304 | switch (event) { | |
305 | case NETDEV_CHANGEMTU: | |
306 | /* A change in mtu is a bad thing, requiring | |
307 | * LCP re-negotiation. | |
308 | */ | |
309 | ||
310 | case NETDEV_GOING_DOWN: | |
311 | case NETDEV_DOWN: | |
312 | /* Find every socket on this device and kill it. */ | |
313 | pppoe_flush_dev(dev); | |
314 | break; | |
315 | ||
316 | default: | |
317 | break; | |
318 | }; | |
319 | ||
320 | return NOTIFY_DONE; | |
321 | } | |
322 | ||
323 | ||
324 | static struct notifier_block pppoe_notifier = { | |
325 | .notifier_call = pppoe_device_event, | |
326 | }; | |
327 | ||
328 | ||
329 | /************************************************************************ | |
330 | * | |
331 | * Do the real work of receiving a PPPoE Session frame. | |
332 | * | |
333 | ***********************************************************************/ | |
334 | static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb) | |
335 | { | |
336 | struct pppox_sock *po = pppox_sk(sk); | |
bfafb26e | 337 | struct pppox_sock *relay_po; |
1da177e4 LT |
338 | |
339 | if (sk->sk_state & PPPOX_BOUND) { | |
797659fb | 340 | struct pppoe_hdr *ph = pppoe_hdr(skb); |
1da177e4 | 341 | int len = ntohs(ph->length); |
cbb042f9 | 342 | skb_pull_rcsum(skb, sizeof(struct pppoe_hdr)); |
1da177e4 LT |
343 | if (pskb_trim_rcsum(skb, len)) |
344 | goto abort_kfree; | |
345 | ||
346 | ppp_input(&po->chan, skb); | |
347 | } else if (sk->sk_state & PPPOX_RELAY) { | |
348 | relay_po = get_item_by_addr(&po->pppoe_relay); | |
349 | ||
350 | if (relay_po == NULL) | |
351 | goto abort_kfree; | |
352 | ||
353 | if ((sk_pppox(relay_po)->sk_state & PPPOX_CONNECTED) == 0) | |
354 | goto abort_put; | |
355 | ||
356 | skb_pull(skb, sizeof(struct pppoe_hdr)); | |
357 | if (!__pppoe_xmit(sk_pppox(relay_po), skb)) | |
358 | goto abort_put; | |
359 | } else { | |
360 | if (sock_queue_rcv_skb(sk, skb)) | |
361 | goto abort_kfree; | |
362 | } | |
363 | ||
364 | return NET_RX_SUCCESS; | |
365 | ||
366 | abort_put: | |
367 | sock_put(sk_pppox(relay_po)); | |
368 | ||
369 | abort_kfree: | |
370 | kfree_skb(skb); | |
371 | return NET_RX_DROP; | |
372 | } | |
373 | ||
374 | /************************************************************************ | |
375 | * | |
376 | * Receive wrapper called in BH context. | |
377 | * | |
378 | ***********************************************************************/ | |
379 | static int pppoe_rcv(struct sk_buff *skb, | |
380 | struct net_device *dev, | |
f2ccd8fa DM |
381 | struct packet_type *pt, |
382 | struct net_device *orig_dev) | |
1da177e4 LT |
383 | |
384 | { | |
385 | struct pppoe_hdr *ph; | |
386 | struct pppox_sock *po; | |
1da177e4 LT |
387 | |
388 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) | |
389 | goto drop; | |
390 | ||
6aa20a22 | 391 | if (!(skb = skb_share_check(skb, GFP_ATOMIC))) |
1da177e4 LT |
392 | goto out; |
393 | ||
797659fb | 394 | ph = pppoe_hdr(skb); |
1da177e4 | 395 | |
90719dbe | 396 | po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
6aa20a22 | 397 | if (po != NULL) |
58a5a7b9 | 398 | return sk_receive_skb(sk_pppox(po), skb, 0); |
1da177e4 LT |
399 | drop: |
400 | kfree_skb(skb); | |
401 | out: | |
402 | return NET_RX_DROP; | |
403 | } | |
404 | ||
405 | /************************************************************************ | |
406 | * | |
407 | * Receive a PPPoE Discovery frame. | |
408 | * This is solely for detection of PADT frames | |
409 | * | |
410 | ***********************************************************************/ | |
411 | static int pppoe_disc_rcv(struct sk_buff *skb, | |
412 | struct net_device *dev, | |
f2ccd8fa DM |
413 | struct packet_type *pt, |
414 | struct net_device *orig_dev) | |
1da177e4 LT |
415 | |
416 | { | |
417 | struct pppoe_hdr *ph; | |
418 | struct pppox_sock *po; | |
419 | ||
420 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) | |
421 | goto abort; | |
422 | ||
6aa20a22 | 423 | if (!(skb = skb_share_check(skb, GFP_ATOMIC))) |
1da177e4 LT |
424 | goto out; |
425 | ||
797659fb | 426 | ph = pppoe_hdr(skb); |
1da177e4 LT |
427 | if (ph->code != PADT_CODE) |
428 | goto abort; | |
429 | ||
90719dbe | 430 | po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
1da177e4 LT |
431 | if (po) { |
432 | struct sock *sk = sk_pppox(po); | |
433 | ||
434 | bh_lock_sock(sk); | |
435 | ||
436 | /* If the user has locked the socket, just ignore | |
437 | * the packet. With the way two rcv protocols hook into | |
438 | * one socket family type, we cannot (easily) distinguish | |
439 | * what kind of SKB it is during backlog rcv. | |
440 | */ | |
441 | if (sock_owned_by_user(sk) == 0) { | |
442 | /* We're no longer connect at the PPPOE layer, | |
443 | * and must wait for ppp channel to disconnect us. | |
444 | */ | |
445 | sk->sk_state = PPPOX_ZOMBIE; | |
446 | } | |
447 | ||
448 | bh_unlock_sock(sk); | |
449 | sock_put(sk); | |
450 | } | |
451 | ||
452 | abort: | |
453 | kfree_skb(skb); | |
454 | out: | |
455 | return NET_RX_SUCCESS; /* Lies... :-) */ | |
456 | } | |
457 | ||
458 | static struct packet_type pppoes_ptype = { | |
459 | .type = __constant_htons(ETH_P_PPP_SES), | |
460 | .func = pppoe_rcv, | |
461 | }; | |
462 | ||
463 | static struct packet_type pppoed_ptype = { | |
464 | .type = __constant_htons(ETH_P_PPP_DISC), | |
465 | .func = pppoe_disc_rcv, | |
466 | }; | |
467 | ||
468 | static struct proto pppoe_sk_proto = { | |
469 | .name = "PPPOE", | |
470 | .owner = THIS_MODULE, | |
471 | .obj_size = sizeof(struct pppox_sock), | |
472 | }; | |
473 | ||
474 | /*********************************************************************** | |
475 | * | |
476 | * Initialize a new struct sock. | |
477 | * | |
478 | **********************************************************************/ | |
479 | static int pppoe_create(struct socket *sock) | |
480 | { | |
481 | int error = -ENOMEM; | |
482 | struct sock *sk; | |
483 | ||
484 | sk = sk_alloc(PF_PPPOX, GFP_KERNEL, &pppoe_sk_proto, 1); | |
485 | if (!sk) | |
486 | goto out; | |
487 | ||
488 | sock_init_data(sock, sk); | |
489 | ||
490 | sock->state = SS_UNCONNECTED; | |
491 | sock->ops = &pppoe_ops; | |
492 | ||
493 | sk->sk_backlog_rcv = pppoe_rcv_core; | |
494 | sk->sk_state = PPPOX_NONE; | |
495 | sk->sk_type = SOCK_STREAM; | |
496 | sk->sk_family = PF_PPPOX; | |
497 | sk->sk_protocol = PX_PROTO_OE; | |
498 | ||
499 | error = 0; | |
500 | out: return error; | |
501 | } | |
502 | ||
503 | static int pppoe_release(struct socket *sock) | |
504 | { | |
505 | struct sock *sk = sock->sk; | |
506 | struct pppox_sock *po; | |
1da177e4 LT |
507 | |
508 | if (!sk) | |
509 | return 0; | |
510 | ||
42dc9cd5 MO |
511 | lock_sock(sk); |
512 | if (sock_flag(sk, SOCK_DEAD)){ | |
513 | release_sock(sk); | |
1da177e4 | 514 | return -EBADF; |
42dc9cd5 | 515 | } |
1da177e4 LT |
516 | |
517 | pppox_unbind_sock(sk); | |
518 | ||
519 | /* Signal the death of the socket. */ | |
520 | sk->sk_state = PPPOX_DEAD; | |
521 | ||
42dc9cd5 MO |
522 | |
523 | /* Write lock on hash lock protects the entire "po" struct from | |
524 | * concurrent updates via pppoe_flush_dev. The "po" struct should | |
525 | * be considered part of the hash table contents, thus protected | |
526 | * by the hash table lock */ | |
527 | write_lock_bh(&pppoe_hash_lock); | |
528 | ||
1da177e4 LT |
529 | po = pppox_sk(sk); |
530 | if (po->pppoe_pa.sid) { | |
42dc9cd5 MO |
531 | __delete_item(po->pppoe_pa.sid, |
532 | po->pppoe_pa.remote, po->pppoe_ifindex); | |
1da177e4 LT |
533 | } |
534 | ||
42dc9cd5 | 535 | if (po->pppoe_dev) { |
1da177e4 | 536 | dev_put(po->pppoe_dev); |
42dc9cd5 MO |
537 | po->pppoe_dev = NULL; |
538 | } | |
1da177e4 | 539 | |
42dc9cd5 | 540 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 LT |
541 | |
542 | sock_orphan(sk); | |
543 | sock->sk = NULL; | |
544 | ||
545 | skb_queue_purge(&sk->sk_receive_queue); | |
42dc9cd5 | 546 | release_sock(sk); |
1da177e4 LT |
547 | sock_put(sk); |
548 | ||
bfafb26e | 549 | return 0; |
1da177e4 LT |
550 | } |
551 | ||
552 | ||
553 | static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr, | |
554 | int sockaddr_len, int flags) | |
555 | { | |
556 | struct sock *sk = sock->sk; | |
90719dbe | 557 | struct net_device *dev; |
1da177e4 LT |
558 | struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr; |
559 | struct pppox_sock *po = pppox_sk(sk); | |
560 | int error; | |
561 | ||
562 | lock_sock(sk); | |
563 | ||
564 | error = -EINVAL; | |
565 | if (sp->sa_protocol != PX_PROTO_OE) | |
566 | goto end; | |
567 | ||
568 | /* Check for already bound sockets */ | |
569 | error = -EBUSY; | |
570 | if ((sk->sk_state & PPPOX_CONNECTED) && sp->sa_addr.pppoe.sid) | |
571 | goto end; | |
572 | ||
573 | /* Check for already disconnected sockets, on attempts to disconnect */ | |
574 | error = -EALREADY; | |
575 | if ((sk->sk_state & PPPOX_DEAD) && !sp->sa_addr.pppoe.sid ) | |
576 | goto end; | |
577 | ||
578 | error = 0; | |
579 | if (po->pppoe_pa.sid) { | |
580 | pppox_unbind_sock(sk); | |
581 | ||
582 | /* Delete the old binding */ | |
6f30e186 | 583 | delete_item(po->pppoe_pa.sid,po->pppoe_pa.remote,po->pppoe_ifindex); |
1da177e4 LT |
584 | |
585 | if(po->pppoe_dev) | |
586 | dev_put(po->pppoe_dev); | |
587 | ||
588 | memset(sk_pppox(po) + 1, 0, | |
589 | sizeof(struct pppox_sock) - sizeof(struct sock)); | |
590 | ||
591 | sk->sk_state = PPPOX_NONE; | |
592 | } | |
593 | ||
594 | /* Don't re-bind if sid==0 */ | |
595 | if (sp->sa_addr.pppoe.sid != 0) { | |
596 | dev = dev_get_by_name(sp->sa_addr.pppoe.dev); | |
597 | ||
598 | error = -ENODEV; | |
599 | if (!dev) | |
600 | goto end; | |
601 | ||
602 | po->pppoe_dev = dev; | |
6f30e186 | 603 | po->pppoe_ifindex = dev->ifindex; |
1da177e4 | 604 | |
74b885cf FZ |
605 | write_lock_bh(&pppoe_hash_lock); |
606 | if (!(dev->flags & IFF_UP)){ | |
607 | write_unlock_bh(&pppoe_hash_lock); | |
1da177e4 | 608 | goto err_put; |
74b885cf | 609 | } |
1da177e4 LT |
610 | |
611 | memcpy(&po->pppoe_pa, | |
612 | &sp->sa_addr.pppoe, | |
613 | sizeof(struct pppoe_addr)); | |
614 | ||
74b885cf FZ |
615 | error = __set_item(po); |
616 | write_unlock_bh(&pppoe_hash_lock); | |
1da177e4 LT |
617 | if (error < 0) |
618 | goto err_put; | |
619 | ||
620 | po->chan.hdrlen = (sizeof(struct pppoe_hdr) + | |
621 | dev->hard_header_len); | |
622 | ||
c9aa6895 | 623 | po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr); |
1da177e4 LT |
624 | po->chan.private = sk; |
625 | po->chan.ops = &pppoe_chan_ops; | |
626 | ||
627 | error = ppp_register_channel(&po->chan); | |
628 | if (error) | |
629 | goto err_put; | |
630 | ||
631 | sk->sk_state = PPPOX_CONNECTED; | |
632 | } | |
633 | ||
634 | po->num = sp->sa_addr.pppoe.sid; | |
635 | ||
636 | end: | |
637 | release_sock(sk); | |
638 | return error; | |
639 | err_put: | |
640 | if (po->pppoe_dev) { | |
641 | dev_put(po->pppoe_dev); | |
642 | po->pppoe_dev = NULL; | |
643 | } | |
644 | goto end; | |
645 | } | |
646 | ||
647 | ||
648 | static int pppoe_getname(struct socket *sock, struct sockaddr *uaddr, | |
649 | int *usockaddr_len, int peer) | |
650 | { | |
651 | int len = sizeof(struct sockaddr_pppox); | |
652 | struct sockaddr_pppox sp; | |
653 | ||
654 | sp.sa_family = AF_PPPOX; | |
655 | sp.sa_protocol = PX_PROTO_OE; | |
656 | memcpy(&sp.sa_addr.pppoe, &pppox_sk(sock->sk)->pppoe_pa, | |
657 | sizeof(struct pppoe_addr)); | |
658 | ||
659 | memcpy(uaddr, &sp, len); | |
660 | ||
661 | *usockaddr_len = len; | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | ||
667 | static int pppoe_ioctl(struct socket *sock, unsigned int cmd, | |
668 | unsigned long arg) | |
669 | { | |
670 | struct sock *sk = sock->sk; | |
671 | struct pppox_sock *po = pppox_sk(sk); | |
86c1dcfc FZ |
672 | int val; |
673 | int err; | |
1da177e4 LT |
674 | |
675 | switch (cmd) { | |
676 | case PPPIOCGMRU: | |
677 | err = -ENXIO; | |
678 | ||
679 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
680 | break; | |
681 | ||
682 | err = -EFAULT; | |
683 | if (put_user(po->pppoe_dev->mtu - | |
684 | sizeof(struct pppoe_hdr) - | |
685 | PPP_HDRLEN, | |
686 | (int __user *) arg)) | |
687 | break; | |
688 | err = 0; | |
689 | break; | |
690 | ||
691 | case PPPIOCSMRU: | |
692 | err = -ENXIO; | |
693 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
694 | break; | |
695 | ||
696 | err = -EFAULT; | |
697 | if (get_user(val,(int __user *) arg)) | |
698 | break; | |
699 | ||
700 | if (val < (po->pppoe_dev->mtu | |
701 | - sizeof(struct pppoe_hdr) | |
702 | - PPP_HDRLEN)) | |
703 | err = 0; | |
704 | else | |
705 | err = -EINVAL; | |
706 | break; | |
707 | ||
708 | case PPPIOCSFLAGS: | |
709 | err = -EFAULT; | |
710 | if (get_user(val, (int __user *) arg)) | |
711 | break; | |
712 | err = 0; | |
713 | break; | |
714 | ||
715 | case PPPOEIOCSFWD: | |
716 | { | |
717 | struct pppox_sock *relay_po; | |
718 | ||
719 | err = -EBUSY; | |
720 | if (sk->sk_state & (PPPOX_BOUND | PPPOX_ZOMBIE | PPPOX_DEAD)) | |
721 | break; | |
722 | ||
723 | err = -ENOTCONN; | |
724 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
725 | break; | |
726 | ||
727 | /* PPPoE address from the user specifies an outbound | |
90719dbe | 728 | PPPoE address which frames are forwarded to */ |
1da177e4 LT |
729 | err = -EFAULT; |
730 | if (copy_from_user(&po->pppoe_relay, | |
731 | (void __user *)arg, | |
732 | sizeof(struct sockaddr_pppox))) | |
733 | break; | |
734 | ||
735 | err = -EINVAL; | |
736 | if (po->pppoe_relay.sa_family != AF_PPPOX || | |
737 | po->pppoe_relay.sa_protocol!= PX_PROTO_OE) | |
738 | break; | |
739 | ||
740 | /* Check that the socket referenced by the address | |
741 | actually exists. */ | |
742 | relay_po = get_item_by_addr(&po->pppoe_relay); | |
743 | ||
744 | if (!relay_po) | |
745 | break; | |
746 | ||
747 | sock_put(sk_pppox(relay_po)); | |
748 | sk->sk_state |= PPPOX_RELAY; | |
749 | err = 0; | |
750 | break; | |
751 | } | |
752 | ||
753 | case PPPOEIOCDFWD: | |
754 | err = -EALREADY; | |
755 | if (!(sk->sk_state & PPPOX_RELAY)) | |
756 | break; | |
757 | ||
758 | sk->sk_state &= ~PPPOX_RELAY; | |
759 | err = 0; | |
760 | break; | |
761 | ||
86c1dcfc FZ |
762 | default: |
763 | err = -ENOTTY; | |
764 | } | |
1da177e4 LT |
765 | |
766 | return err; | |
767 | } | |
768 | ||
769 | ||
6aa20a22 | 770 | static int pppoe_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
771 | struct msghdr *m, size_t total_len) |
772 | { | |
bfafb26e | 773 | struct sk_buff *skb; |
1da177e4 LT |
774 | struct sock *sk = sock->sk; |
775 | struct pppox_sock *po = pppox_sk(sk); | |
bfafb26e | 776 | int error; |
1da177e4 LT |
777 | struct pppoe_hdr hdr; |
778 | struct pppoe_hdr *ph; | |
779 | struct net_device *dev; | |
780 | char *start; | |
781 | ||
8aeca8fe | 782 | lock_sock(sk); |
1da177e4 LT |
783 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) { |
784 | error = -ENOTCONN; | |
785 | goto end; | |
786 | } | |
787 | ||
788 | hdr.ver = 1; | |
789 | hdr.type = 1; | |
790 | hdr.code = 0; | |
791 | hdr.sid = po->num; | |
792 | ||
1da177e4 LT |
793 | dev = po->pppoe_dev; |
794 | ||
795 | error = -EMSGSIZE; | |
796 | if (total_len > (dev->mtu + dev->hard_header_len)) | |
797 | goto end; | |
798 | ||
799 | ||
800 | skb = sock_wmalloc(sk, total_len + dev->hard_header_len + 32, | |
801 | 0, GFP_KERNEL); | |
802 | if (!skb) { | |
803 | error = -ENOMEM; | |
804 | goto end; | |
805 | } | |
806 | ||
807 | /* Reserve space for headers. */ | |
808 | skb_reserve(skb, dev->hard_header_len); | |
c1d2bbe1 | 809 | skb_reset_network_header(skb); |
1da177e4 LT |
810 | |
811 | skb->dev = dev; | |
812 | ||
813 | skb->priority = sk->sk_priority; | |
814 | skb->protocol = __constant_htons(ETH_P_PPP_SES); | |
815 | ||
816 | ph = (struct pppoe_hdr *) skb_put(skb, total_len + sizeof(struct pppoe_hdr)); | |
817 | start = (char *) &ph->tag[0]; | |
818 | ||
819 | error = memcpy_fromiovec(start, m->msg_iov, total_len); | |
820 | ||
821 | if (error < 0) { | |
822 | kfree_skb(skb); | |
823 | goto end; | |
824 | } | |
825 | ||
826 | error = total_len; | |
827 | dev->hard_header(skb, dev, ETH_P_PPP_SES, | |
828 | po->pppoe_pa.remote, NULL, total_len); | |
829 | ||
830 | memcpy(ph, &hdr, sizeof(struct pppoe_hdr)); | |
831 | ||
832 | ph->length = htons(total_len); | |
833 | ||
834 | dev_queue_xmit(skb); | |
835 | ||
836 | end: | |
837 | release_sock(sk); | |
838 | return error; | |
839 | } | |
840 | ||
841 | ||
842 | /************************************************************************ | |
843 | * | |
844 | * xmit function for internal use. | |
845 | * | |
846 | ***********************************************************************/ | |
847 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb) | |
848 | { | |
849 | struct pppox_sock *po = pppox_sk(sk); | |
850 | struct net_device *dev = po->pppoe_dev; | |
851 | struct pppoe_hdr hdr; | |
852 | struct pppoe_hdr *ph; | |
853 | int headroom = skb_headroom(skb); | |
854 | int data_len = skb->len; | |
855 | struct sk_buff *skb2; | |
856 | ||
857 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) | |
858 | goto abort; | |
859 | ||
860 | hdr.ver = 1; | |
861 | hdr.type = 1; | |
862 | hdr.code = 0; | |
863 | hdr.sid = po->num; | |
864 | hdr.length = htons(skb->len); | |
865 | ||
866 | if (!dev) | |
867 | goto abort; | |
868 | ||
869 | /* Copy the skb if there is no space for the header. */ | |
870 | if (headroom < (sizeof(struct pppoe_hdr) + dev->hard_header_len)) { | |
871 | skb2 = dev_alloc_skb(32+skb->len + | |
872 | sizeof(struct pppoe_hdr) + | |
873 | dev->hard_header_len); | |
874 | ||
875 | if (skb2 == NULL) | |
876 | goto abort; | |
877 | ||
878 | skb_reserve(skb2, dev->hard_header_len + sizeof(struct pppoe_hdr)); | |
d626f62b ACM |
879 | skb_copy_from_linear_data(skb, skb_put(skb2, skb->len), |
880 | skb->len); | |
1da177e4 LT |
881 | } else { |
882 | /* Make a clone so as to not disturb the original skb, | |
883 | * give dev_queue_xmit something it can free. | |
884 | */ | |
885 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
9bc18091 FM |
886 | |
887 | if (skb2 == NULL) | |
888 | goto abort; | |
1da177e4 LT |
889 | } |
890 | ||
891 | ph = (struct pppoe_hdr *) skb_push(skb2, sizeof(struct pppoe_hdr)); | |
892 | memcpy(ph, &hdr, sizeof(struct pppoe_hdr)); | |
893 | skb2->protocol = __constant_htons(ETH_P_PPP_SES); | |
894 | ||
c1d2bbe1 | 895 | skb_reset_network_header(skb2); |
1da177e4 LT |
896 | |
897 | skb2->dev = dev; | |
898 | ||
899 | dev->hard_header(skb2, dev, ETH_P_PPP_SES, | |
900 | po->pppoe_pa.remote, NULL, data_len); | |
901 | ||
902 | /* We're transmitting skb2, and assuming that dev_queue_xmit | |
903 | * will free it. The generic ppp layer however, is expecting | |
904 | * that we give back 'skb' (not 'skb2') in case of failure, | |
905 | * but free it in case of success. | |
906 | */ | |
907 | ||
908 | if (dev_queue_xmit(skb2) < 0) | |
909 | goto abort; | |
910 | ||
911 | kfree_skb(skb); | |
912 | return 1; | |
913 | ||
914 | abort: | |
915 | return 0; | |
916 | } | |
917 | ||
918 | ||
919 | /************************************************************************ | |
920 | * | |
921 | * xmit function called by generic PPP driver | |
922 | * sends PPP frame over PPPoE socket | |
923 | * | |
924 | ***********************************************************************/ | |
925 | static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb) | |
926 | { | |
927 | struct sock *sk = (struct sock *) chan->private; | |
928 | return __pppoe_xmit(sk, skb); | |
929 | } | |
930 | ||
931 | ||
6aa20a22 JG |
932 | static struct ppp_channel_ops pppoe_chan_ops = { |
933 | .start_xmit = pppoe_xmit, | |
1da177e4 LT |
934 | }; |
935 | ||
936 | static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock, | |
937 | struct msghdr *m, size_t total_len, int flags) | |
938 | { | |
939 | struct sock *sk = sock->sk; | |
bfafb26e | 940 | struct sk_buff *skb; |
1da177e4 | 941 | int error = 0; |
1da177e4 LT |
942 | |
943 | if (sk->sk_state & PPPOX_BOUND) { | |
944 | error = -EIO; | |
945 | goto end; | |
946 | } | |
947 | ||
948 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
949 | flags & MSG_DONTWAIT, &error); | |
950 | ||
bfafb26e | 951 | if (error < 0) |
1da177e4 | 952 | goto end; |
1da177e4 LT |
953 | |
954 | m->msg_namelen = 0; | |
955 | ||
956 | if (skb) { | |
797659fb ACM |
957 | struct pppoe_hdr *ph = pppoe_hdr(skb); |
958 | const int len = ntohs(ph->length); | |
1da177e4 LT |
959 | |
960 | error = memcpy_toiovec(m->msg_iov, (unsigned char *) &ph->tag[0], len); | |
797659fb ACM |
961 | if (error == 0) |
962 | error = len; | |
1da177e4 LT |
963 | } |
964 | ||
797659fb | 965 | kfree_skb(skb); |
1da177e4 LT |
966 | end: |
967 | return error; | |
968 | } | |
969 | ||
970 | #ifdef CONFIG_PROC_FS | |
971 | static int pppoe_seq_show(struct seq_file *seq, void *v) | |
972 | { | |
973 | struct pppox_sock *po; | |
974 | char *dev_name; | |
975 | ||
976 | if (v == SEQ_START_TOKEN) { | |
977 | seq_puts(seq, "Id Address Device\n"); | |
978 | goto out; | |
979 | } | |
980 | ||
981 | po = v; | |
982 | dev_name = po->pppoe_pa.dev; | |
983 | ||
984 | seq_printf(seq, "%08X %02X:%02X:%02X:%02X:%02X:%02X %8s\n", | |
985 | po->pppoe_pa.sid, | |
986 | po->pppoe_pa.remote[0], po->pppoe_pa.remote[1], | |
987 | po->pppoe_pa.remote[2], po->pppoe_pa.remote[3], | |
988 | po->pppoe_pa.remote[4], po->pppoe_pa.remote[5], dev_name); | |
989 | out: | |
990 | return 0; | |
991 | } | |
992 | ||
993 | static __inline__ struct pppox_sock *pppoe_get_idx(loff_t pos) | |
994 | { | |
bfafb26e | 995 | struct pppox_sock *po; |
1da177e4 LT |
996 | int i = 0; |
997 | ||
998 | for (; i < PPPOE_HASH_SIZE; i++) { | |
999 | po = item_hash_table[i]; | |
1000 | while (po) { | |
1001 | if (!pos--) | |
1002 | goto out; | |
1003 | po = po->next; | |
1004 | } | |
1005 | } | |
1006 | out: | |
1007 | return po; | |
1008 | } | |
1009 | ||
1010 | static void *pppoe_seq_start(struct seq_file *seq, loff_t *pos) | |
1011 | { | |
1012 | loff_t l = *pos; | |
1013 | ||
1014 | read_lock_bh(&pppoe_hash_lock); | |
1015 | return l ? pppoe_get_idx(--l) : SEQ_START_TOKEN; | |
1016 | } | |
1017 | ||
1018 | static void *pppoe_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1019 | { | |
1020 | struct pppox_sock *po; | |
1021 | ||
1022 | ++*pos; | |
1023 | if (v == SEQ_START_TOKEN) { | |
1024 | po = pppoe_get_idx(0); | |
1025 | goto out; | |
1026 | } | |
1027 | po = v; | |
6aa20a22 | 1028 | if (po->next) |
1da177e4 LT |
1029 | po = po->next; |
1030 | else { | |
1031 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); | |
1032 | ||
1033 | while (++hash < PPPOE_HASH_SIZE) { | |
1034 | po = item_hash_table[hash]; | |
1035 | if (po) | |
1036 | break; | |
1037 | } | |
1038 | } | |
1039 | out: | |
1040 | return po; | |
1041 | } | |
1042 | ||
1043 | static void pppoe_seq_stop(struct seq_file *seq, void *v) | |
1044 | { | |
1045 | read_unlock_bh(&pppoe_hash_lock); | |
1046 | } | |
1047 | ||
1048 | static struct seq_operations pppoe_seq_ops = { | |
1049 | .start = pppoe_seq_start, | |
1050 | .next = pppoe_seq_next, | |
1051 | .stop = pppoe_seq_stop, | |
1052 | .show = pppoe_seq_show, | |
1053 | }; | |
1054 | ||
1055 | static int pppoe_seq_open(struct inode *inode, struct file *file) | |
1056 | { | |
1057 | return seq_open(file, &pppoe_seq_ops); | |
1058 | } | |
1059 | ||
d54b1fdb | 1060 | static const struct file_operations pppoe_seq_fops = { |
1da177e4 LT |
1061 | .owner = THIS_MODULE, |
1062 | .open = pppoe_seq_open, | |
1063 | .read = seq_read, | |
1064 | .llseek = seq_lseek, | |
1065 | .release = seq_release, | |
1066 | }; | |
1067 | ||
1068 | static int __init pppoe_proc_init(void) | |
1069 | { | |
1070 | struct proc_dir_entry *p; | |
1071 | ||
66600221 | 1072 | p = create_proc_entry("net/pppoe", S_IRUGO, NULL); |
1da177e4 LT |
1073 | if (!p) |
1074 | return -ENOMEM; | |
1075 | ||
1076 | p->proc_fops = &pppoe_seq_fops; | |
1077 | return 0; | |
1078 | } | |
1079 | #else /* CONFIG_PROC_FS */ | |
1080 | static inline int pppoe_proc_init(void) { return 0; } | |
1081 | #endif /* CONFIG_PROC_FS */ | |
1082 | ||
17ba15fb | 1083 | static const struct proto_ops pppoe_ops = { |
1da177e4 LT |
1084 | .family = AF_PPPOX, |
1085 | .owner = THIS_MODULE, | |
1086 | .release = pppoe_release, | |
1087 | .bind = sock_no_bind, | |
1088 | .connect = pppoe_connect, | |
1089 | .socketpair = sock_no_socketpair, | |
1090 | .accept = sock_no_accept, | |
1091 | .getname = pppoe_getname, | |
1092 | .poll = datagram_poll, | |
1093 | .listen = sock_no_listen, | |
1094 | .shutdown = sock_no_shutdown, | |
1095 | .setsockopt = sock_no_setsockopt, | |
1096 | .getsockopt = sock_no_getsockopt, | |
1097 | .sendmsg = pppoe_sendmsg, | |
1098 | .recvmsg = pppoe_recvmsg, | |
17ba15fb DM |
1099 | .mmap = sock_no_mmap, |
1100 | .ioctl = pppox_ioctl, | |
1da177e4 LT |
1101 | }; |
1102 | ||
1103 | static struct pppox_proto pppoe_proto = { | |
1104 | .create = pppoe_create, | |
1105 | .ioctl = pppoe_ioctl, | |
1106 | .owner = THIS_MODULE, | |
1107 | }; | |
1108 | ||
1109 | ||
1110 | static int __init pppoe_init(void) | |
1111 | { | |
1112 | int err = proto_register(&pppoe_sk_proto, 0); | |
1113 | ||
1114 | if (err) | |
1115 | goto out; | |
1116 | ||
1117 | err = register_pppox_proto(PX_PROTO_OE, &pppoe_proto); | |
1118 | if (err) | |
1119 | goto out_unregister_pppoe_proto; | |
1120 | ||
1121 | err = pppoe_proc_init(); | |
1122 | if (err) | |
1123 | goto out_unregister_pppox_proto; | |
6aa20a22 | 1124 | |
1da177e4 LT |
1125 | dev_add_pack(&pppoes_ptype); |
1126 | dev_add_pack(&pppoed_ptype); | |
1127 | register_netdevice_notifier(&pppoe_notifier); | |
1128 | out: | |
1129 | return err; | |
1130 | out_unregister_pppox_proto: | |
1131 | unregister_pppox_proto(PX_PROTO_OE); | |
1132 | out_unregister_pppoe_proto: | |
1133 | proto_unregister(&pppoe_sk_proto); | |
1134 | goto out; | |
1135 | } | |
1136 | ||
1137 | static void __exit pppoe_exit(void) | |
1138 | { | |
1139 | unregister_pppox_proto(PX_PROTO_OE); | |
1140 | dev_remove_pack(&pppoes_ptype); | |
1141 | dev_remove_pack(&pppoed_ptype); | |
1142 | unregister_netdevice_notifier(&pppoe_notifier); | |
66600221 | 1143 | remove_proc_entry("net/pppoe", NULL); |
1da177e4 LT |
1144 | proto_unregister(&pppoe_sk_proto); |
1145 | } | |
1146 | ||
1147 | module_init(pppoe_init); | |
1148 | module_exit(pppoe_exit); | |
1149 | ||
1150 | MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>"); | |
1151 | MODULE_DESCRIPTION("PPP over Ethernet driver"); | |
1152 | MODULE_LICENSE("GPL"); | |
1153 | MODULE_ALIAS_NETPROTO(PF_PPPOX); |