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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 | ||
457c4cbc | 81 | #include <net/net_namespace.h> |
1da177e4 LT |
82 | #include <net/sock.h> |
83 | ||
84 | #include <asm/uaccess.h> | |
85 | ||
86 | #define PPPOE_HASH_BITS 4 | |
6aba9158 CG |
87 | #define PPPOE_HASH_SIZE (1 << PPPOE_HASH_BITS) |
88 | #define PPPOE_HASH_MASK (PPPOE_HASH_SIZE - 1) | |
1da177e4 LT |
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; |
6aba9158 | 95 | static struct ppp_channel_ops pppoe_chan_ops; |
1da177e4 LT |
96 | static DEFINE_RWLOCK(pppoe_hash_lock); |
97 | ||
6aba9158 CG |
98 | /* |
99 | * PPPoE could be in the following stages: | |
100 | * 1) Discovery stage (to obtain remote MAC and Session ID) | |
101 | * 2) Session stage (MAC and SID are known) | |
102 | * | |
103 | * Ethernet frames have a special tag for this but | |
104 | * we use simplier approach based on session id | |
105 | */ | |
106 | static inline bool stage_session(__be16 sid) | |
107 | { | |
108 | return sid != 0; | |
109 | } | |
1da177e4 LT |
110 | |
111 | static inline int cmp_2_addr(struct pppoe_addr *a, struct pppoe_addr *b) | |
112 | { | |
6aba9158 CG |
113 | return a->sid == b->sid && |
114 | (memcmp(a->remote, b->remote, ETH_ALEN) == 0); | |
1da177e4 LT |
115 | } |
116 | ||
b963dc1d | 117 | static inline int cmp_addr(struct pppoe_addr *a, __be16 sid, char *addr) |
1da177e4 | 118 | { |
6aba9158 CG |
119 | return a->sid == sid && |
120 | (memcmp(a->remote, addr, ETH_ALEN) == 0); | |
1da177e4 LT |
121 | } |
122 | ||
6aba9158 | 123 | #if 8 % PPPOE_HASH_BITS |
f1543f8b FZ |
124 | #error 8 must be a multiple of PPPOE_HASH_BITS |
125 | #endif | |
126 | ||
b963dc1d | 127 | static int hash_item(__be16 sid, unsigned char *addr) |
1da177e4 | 128 | { |
f1543f8b FZ |
129 | unsigned char hash = 0; |
130 | unsigned int i; | |
1da177e4 | 131 | |
6aba9158 | 132 | for (i = 0; i < ETH_ALEN; i++) |
f1543f8b | 133 | hash ^= addr[i]; |
6aba9158 CG |
134 | for (i = 0; i < sizeof(sid_t) * 8; i += 8) |
135 | hash ^= (__force __u32)sid >> i; | |
136 | for (i = 8; (i >>= 1) >= PPPOE_HASH_BITS;) | |
137 | hash ^= hash >> i; | |
1da177e4 | 138 | |
6aba9158 | 139 | return hash & PPPOE_HASH_MASK; |
1da177e4 LT |
140 | } |
141 | ||
142 | /* zeroed because its in .bss */ | |
143 | static struct pppox_sock *item_hash_table[PPPOE_HASH_SIZE]; | |
144 | ||
145 | /********************************************************************** | |
146 | * | |
147 | * Set/get/delete/rehash items (internal versions) | |
148 | * | |
149 | **********************************************************************/ | |
b963dc1d | 150 | static struct pppox_sock *__get_item(__be16 sid, unsigned char *addr, int ifindex) |
1da177e4 LT |
151 | { |
152 | int hash = hash_item(sid, addr); | |
153 | struct pppox_sock *ret; | |
154 | ||
155 | ret = item_hash_table[hash]; | |
156 | ||
6aba9158 CG |
157 | while (ret) { |
158 | if (cmp_addr(&ret->pppoe_pa, sid, addr) && | |
159 | ret->pppoe_ifindex == ifindex) | |
160 | return ret; | |
161 | ||
1da177e4 | 162 | ret = ret->next; |
6aba9158 | 163 | } |
1da177e4 | 164 | |
6aba9158 | 165 | return NULL; |
1da177e4 LT |
166 | } |
167 | ||
168 | static int __set_item(struct pppox_sock *po) | |
169 | { | |
170 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); | |
171 | struct pppox_sock *ret; | |
172 | ||
173 | ret = item_hash_table[hash]; | |
174 | while (ret) { | |
6aba9158 CG |
175 | if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) && |
176 | ret->pppoe_ifindex == po->pppoe_ifindex) | |
1da177e4 LT |
177 | return -EALREADY; |
178 | ||
179 | ret = ret->next; | |
180 | } | |
181 | ||
90719dbe FZ |
182 | po->next = item_hash_table[hash]; |
183 | item_hash_table[hash] = po; | |
1da177e4 LT |
184 | |
185 | return 0; | |
186 | } | |
187 | ||
b963dc1d | 188 | static struct pppox_sock *__delete_item(__be16 sid, char *addr, int ifindex) |
1da177e4 LT |
189 | { |
190 | int hash = hash_item(sid, addr); | |
191 | struct pppox_sock *ret, **src; | |
192 | ||
193 | ret = item_hash_table[hash]; | |
194 | src = &item_hash_table[hash]; | |
195 | ||
196 | while (ret) { | |
6aba9158 CG |
197 | if (cmp_addr(&ret->pppoe_pa, sid, addr) && |
198 | ret->pppoe_ifindex == ifindex) { | |
1da177e4 LT |
199 | *src = ret->next; |
200 | break; | |
201 | } | |
202 | ||
203 | src = &ret->next; | |
204 | ret = ret->next; | |
205 | } | |
206 | ||
207 | return ret; | |
208 | } | |
209 | ||
210 | /********************************************************************** | |
211 | * | |
212 | * Set/get/delete/rehash items | |
213 | * | |
214 | **********************************************************************/ | |
b963dc1d | 215 | static inline struct pppox_sock *get_item(__be16 sid, |
90719dbe | 216 | unsigned char *addr, int ifindex) |
1da177e4 LT |
217 | { |
218 | struct pppox_sock *po; | |
219 | ||
220 | read_lock_bh(&pppoe_hash_lock); | |
90719dbe | 221 | po = __get_item(sid, addr, ifindex); |
1da177e4 LT |
222 | if (po) |
223 | sock_hold(sk_pppox(po)); | |
224 | read_unlock_bh(&pppoe_hash_lock); | |
225 | ||
226 | return po; | |
227 | } | |
228 | ||
229 | static inline struct pppox_sock *get_item_by_addr(struct sockaddr_pppox *sp) | |
230 | { | |
bfafb26e | 231 | struct net_device *dev; |
90719dbe FZ |
232 | int ifindex; |
233 | ||
881d966b | 234 | dev = dev_get_by_name(&init_net, sp->sa_addr.pppoe.dev); |
6aba9158 | 235 | if (!dev) |
90719dbe FZ |
236 | return NULL; |
237 | ifindex = dev->ifindex; | |
238 | dev_put(dev); | |
239 | return get_item(sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote, ifindex); | |
1da177e4 LT |
240 | } |
241 | ||
b963dc1d | 242 | static inline struct pppox_sock *delete_item(__be16 sid, char *addr, int ifindex) |
1da177e4 LT |
243 | { |
244 | struct pppox_sock *ret; | |
245 | ||
246 | write_lock_bh(&pppoe_hash_lock); | |
90719dbe | 247 | ret = __delete_item(sid, addr, ifindex); |
1da177e4 LT |
248 | write_unlock_bh(&pppoe_hash_lock); |
249 | ||
250 | return ret; | |
251 | } | |
252 | ||
253 | ||
254 | ||
255 | /*************************************************************************** | |
256 | * | |
257 | * Handler for device events. | |
258 | * Certain device events require that sockets be unconnected. | |
259 | * | |
260 | **************************************************************************/ | |
261 | ||
262 | static void pppoe_flush_dev(struct net_device *dev) | |
263 | { | |
264 | int hash; | |
1da177e4 LT |
265 | BUG_ON(dev == NULL); |
266 | ||
42dc9cd5 | 267 | write_lock_bh(&pppoe_hash_lock); |
1da177e4 LT |
268 | for (hash = 0; hash < PPPOE_HASH_SIZE; hash++) { |
269 | struct pppox_sock *po = item_hash_table[hash]; | |
270 | ||
271 | while (po != NULL) { | |
42dc9cd5 MO |
272 | struct sock *sk = sk_pppox(po); |
273 | if (po->pppoe_dev != dev) { | |
274 | po = po->next; | |
275 | continue; | |
276 | } | |
277 | po->pppoe_dev = NULL; | |
278 | dev_put(dev); | |
1da177e4 | 279 | |
1da177e4 | 280 | |
42dc9cd5 MO |
281 | /* We always grab the socket lock, followed by the |
282 | * pppoe_hash_lock, in that order. Since we should | |
283 | * hold the sock lock while doing any unbinding, | |
284 | * we need to release the lock we're holding. | |
285 | * Hold a reference to the sock so it doesn't disappear | |
286 | * as we're jumping between locks. | |
287 | */ | |
1da177e4 | 288 | |
42dc9cd5 | 289 | sock_hold(sk); |
1da177e4 | 290 | |
42dc9cd5 MO |
291 | write_unlock_bh(&pppoe_hash_lock); |
292 | lock_sock(sk); | |
1da177e4 | 293 | |
42dc9cd5 MO |
294 | if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) { |
295 | pppox_unbind_sock(sk); | |
296 | sk->sk_state = PPPOX_ZOMBIE; | |
297 | sk->sk_state_change(sk); | |
298 | } | |
1da177e4 | 299 | |
42dc9cd5 MO |
300 | release_sock(sk); |
301 | sock_put(sk); | |
1da177e4 | 302 | |
42dc9cd5 MO |
303 | /* Restart scan at the beginning of this hash chain. |
304 | * While the lock was dropped the chain contents may | |
305 | * have changed. | |
306 | */ | |
307 | write_lock_bh(&pppoe_hash_lock); | |
308 | po = item_hash_table[hash]; | |
1da177e4 LT |
309 | } |
310 | } | |
42dc9cd5 | 311 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 LT |
312 | } |
313 | ||
314 | static int pppoe_device_event(struct notifier_block *this, | |
315 | unsigned long event, void *ptr) | |
316 | { | |
317 | struct net_device *dev = (struct net_device *) ptr; | |
318 | ||
c346dca1 | 319 | if (dev_net(dev) != &init_net) |
e9dc8653 EB |
320 | return NOTIFY_DONE; |
321 | ||
1da177e4 LT |
322 | /* Only look at sockets that are using this specific device. */ |
323 | switch (event) { | |
324 | case NETDEV_CHANGEMTU: | |
325 | /* A change in mtu is a bad thing, requiring | |
326 | * LCP re-negotiation. | |
327 | */ | |
328 | ||
329 | case NETDEV_GOING_DOWN: | |
330 | case NETDEV_DOWN: | |
331 | /* Find every socket on this device and kill it. */ | |
332 | pppoe_flush_dev(dev); | |
333 | break; | |
334 | ||
335 | default: | |
336 | break; | |
337 | }; | |
338 | ||
339 | return NOTIFY_DONE; | |
340 | } | |
341 | ||
342 | ||
343 | static struct notifier_block pppoe_notifier = { | |
344 | .notifier_call = pppoe_device_event, | |
345 | }; | |
346 | ||
1da177e4 LT |
347 | /************************************************************************ |
348 | * | |
349 | * Do the real work of receiving a PPPoE Session frame. | |
350 | * | |
351 | ***********************************************************************/ | |
352 | static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb) | |
353 | { | |
354 | struct pppox_sock *po = pppox_sk(sk); | |
bfafb26e | 355 | struct pppox_sock *relay_po; |
1da177e4 LT |
356 | |
357 | if (sk->sk_state & PPPOX_BOUND) { | |
1da177e4 LT |
358 | ppp_input(&po->chan, skb); |
359 | } else if (sk->sk_state & PPPOX_RELAY) { | |
360 | relay_po = get_item_by_addr(&po->pppoe_relay); | |
361 | ||
362 | if (relay_po == NULL) | |
363 | goto abort_kfree; | |
364 | ||
365 | if ((sk_pppox(relay_po)->sk_state & PPPOX_CONNECTED) == 0) | |
366 | goto abort_put; | |
367 | ||
1da177e4 LT |
368 | if (!__pppoe_xmit(sk_pppox(relay_po), skb)) |
369 | goto abort_put; | |
370 | } else { | |
371 | if (sock_queue_rcv_skb(sk, skb)) | |
372 | goto abort_kfree; | |
373 | } | |
374 | ||
375 | return NET_RX_SUCCESS; | |
376 | ||
377 | abort_put: | |
378 | sock_put(sk_pppox(relay_po)); | |
379 | ||
380 | abort_kfree: | |
381 | kfree_skb(skb); | |
382 | return NET_RX_DROP; | |
383 | } | |
384 | ||
385 | /************************************************************************ | |
386 | * | |
387 | * Receive wrapper called in BH context. | |
388 | * | |
389 | ***********************************************************************/ | |
390 | static int pppoe_rcv(struct sk_buff *skb, | |
391 | struct net_device *dev, | |
f2ccd8fa DM |
392 | struct packet_type *pt, |
393 | struct net_device *orig_dev) | |
1da177e4 LT |
394 | |
395 | { | |
396 | struct pppoe_hdr *ph; | |
397 | struct pppox_sock *po; | |
392fdb0e | 398 | int len; |
1da177e4 | 399 | |
6aba9158 CG |
400 | skb = skb_share_check(skb, GFP_ATOMIC); |
401 | if (!skb) | |
1da177e4 LT |
402 | goto out; |
403 | ||
c346dca1 | 404 | if (dev_net(dev) != &init_net) |
e730c155 EB |
405 | goto drop; |
406 | ||
31bac444 HX |
407 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) |
408 | goto drop; | |
409 | ||
797659fb | 410 | ph = pppoe_hdr(skb); |
392fdb0e HX |
411 | len = ntohs(ph->length); |
412 | ||
413 | skb_pull_rcsum(skb, sizeof(*ph)); | |
414 | if (skb->len < len) | |
415 | goto drop; | |
1da177e4 | 416 | |
263e69cb | 417 | if (pskb_trim_rcsum(skb, len)) |
392fdb0e HX |
418 | goto drop; |
419 | ||
263e69cb DM |
420 | po = get_item(ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
421 | if (!po) | |
392fdb0e HX |
422 | goto drop; |
423 | ||
424 | return sk_receive_skb(sk_pppox(po), skb, 0); | |
425 | ||
1da177e4 LT |
426 | drop: |
427 | kfree_skb(skb); | |
428 | out: | |
429 | return NET_RX_DROP; | |
430 | } | |
431 | ||
432 | /************************************************************************ | |
433 | * | |
434 | * Receive a PPPoE Discovery frame. | |
435 | * This is solely for detection of PADT frames | |
436 | * | |
437 | ***********************************************************************/ | |
438 | static int pppoe_disc_rcv(struct sk_buff *skb, | |
439 | struct net_device *dev, | |
f2ccd8fa DM |
440 | struct packet_type *pt, |
441 | struct net_device *orig_dev) | |
1da177e4 LT |
442 | |
443 | { | |
444 | struct pppoe_hdr *ph; | |
445 | struct pppox_sock *po; | |
446 | ||
c346dca1 | 447 | if (dev_net(dev) != &init_net) |
e730c155 EB |
448 | goto abort; |
449 | ||
6aba9158 CG |
450 | skb = skb_share_check(skb, GFP_ATOMIC); |
451 | if (!skb) | |
1da177e4 LT |
452 | goto out; |
453 | ||
bc6cffd1 HX |
454 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) |
455 | goto abort; | |
456 | ||
797659fb | 457 | ph = pppoe_hdr(skb); |
1da177e4 LT |
458 | if (ph->code != PADT_CODE) |
459 | goto abort; | |
460 | ||
b963dc1d | 461 | po = get_item(ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
1da177e4 LT |
462 | if (po) { |
463 | struct sock *sk = sk_pppox(po); | |
464 | ||
465 | bh_lock_sock(sk); | |
466 | ||
467 | /* If the user has locked the socket, just ignore | |
468 | * the packet. With the way two rcv protocols hook into | |
469 | * one socket family type, we cannot (easily) distinguish | |
470 | * what kind of SKB it is during backlog rcv. | |
471 | */ | |
472 | if (sock_owned_by_user(sk) == 0) { | |
473 | /* We're no longer connect at the PPPOE layer, | |
474 | * and must wait for ppp channel to disconnect us. | |
475 | */ | |
476 | sk->sk_state = PPPOX_ZOMBIE; | |
477 | } | |
478 | ||
479 | bh_unlock_sock(sk); | |
480 | sock_put(sk); | |
481 | } | |
482 | ||
483 | abort: | |
484 | kfree_skb(skb); | |
485 | out: | |
486 | return NET_RX_SUCCESS; /* Lies... :-) */ | |
487 | } | |
488 | ||
489 | static struct packet_type pppoes_ptype = { | |
490 | .type = __constant_htons(ETH_P_PPP_SES), | |
491 | .func = pppoe_rcv, | |
492 | }; | |
493 | ||
494 | static struct packet_type pppoed_ptype = { | |
495 | .type = __constant_htons(ETH_P_PPP_DISC), | |
496 | .func = pppoe_disc_rcv, | |
497 | }; | |
498 | ||
499 | static struct proto pppoe_sk_proto = { | |
500 | .name = "PPPOE", | |
501 | .owner = THIS_MODULE, | |
502 | .obj_size = sizeof(struct pppox_sock), | |
503 | }; | |
504 | ||
505 | /*********************************************************************** | |
506 | * | |
507 | * Initialize a new struct sock. | |
508 | * | |
509 | **********************************************************************/ | |
1b8d7ae4 | 510 | static int pppoe_create(struct net *net, struct socket *sock) |
1da177e4 | 511 | { |
1da177e4 LT |
512 | struct sock *sk; |
513 | ||
6257ff21 | 514 | sk = sk_alloc(net, PF_PPPOX, GFP_KERNEL, &pppoe_sk_proto); |
1da177e4 | 515 | if (!sk) |
6aba9158 | 516 | return -ENOMEM; |
1da177e4 LT |
517 | |
518 | sock_init_data(sock, sk); | |
519 | ||
520 | sock->state = SS_UNCONNECTED; | |
521 | sock->ops = &pppoe_ops; | |
522 | ||
523 | sk->sk_backlog_rcv = pppoe_rcv_core; | |
524 | sk->sk_state = PPPOX_NONE; | |
525 | sk->sk_type = SOCK_STREAM; | |
526 | sk->sk_family = PF_PPPOX; | |
527 | sk->sk_protocol = PX_PROTO_OE; | |
528 | ||
6aba9158 | 529 | return 0; |
1da177e4 LT |
530 | } |
531 | ||
532 | static int pppoe_release(struct socket *sock) | |
533 | { | |
534 | struct sock *sk = sock->sk; | |
535 | struct pppox_sock *po; | |
1da177e4 LT |
536 | |
537 | if (!sk) | |
538 | return 0; | |
539 | ||
42dc9cd5 | 540 | lock_sock(sk); |
6aba9158 | 541 | if (sock_flag(sk, SOCK_DEAD)) { |
42dc9cd5 | 542 | release_sock(sk); |
1da177e4 | 543 | return -EBADF; |
42dc9cd5 | 544 | } |
1da177e4 LT |
545 | |
546 | pppox_unbind_sock(sk); | |
547 | ||
548 | /* Signal the death of the socket. */ | |
549 | sk->sk_state = PPPOX_DEAD; | |
550 | ||
42dc9cd5 MO |
551 | |
552 | /* Write lock on hash lock protects the entire "po" struct from | |
553 | * concurrent updates via pppoe_flush_dev. The "po" struct should | |
554 | * be considered part of the hash table contents, thus protected | |
555 | * by the hash table lock */ | |
556 | write_lock_bh(&pppoe_hash_lock); | |
557 | ||
1da177e4 | 558 | po = pppox_sk(sk); |
6aba9158 | 559 | if (stage_session(po->pppoe_pa.sid)) { |
42dc9cd5 MO |
560 | __delete_item(po->pppoe_pa.sid, |
561 | po->pppoe_pa.remote, po->pppoe_ifindex); | |
1da177e4 LT |
562 | } |
563 | ||
42dc9cd5 | 564 | if (po->pppoe_dev) { |
1da177e4 | 565 | dev_put(po->pppoe_dev); |
42dc9cd5 MO |
566 | po->pppoe_dev = NULL; |
567 | } | |
1da177e4 | 568 | |
42dc9cd5 | 569 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 LT |
570 | |
571 | sock_orphan(sk); | |
572 | sock->sk = NULL; | |
573 | ||
574 | skb_queue_purge(&sk->sk_receive_queue); | |
42dc9cd5 | 575 | release_sock(sk); |
1da177e4 LT |
576 | sock_put(sk); |
577 | ||
bfafb26e | 578 | return 0; |
1da177e4 LT |
579 | } |
580 | ||
1da177e4 LT |
581 | static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr, |
582 | int sockaddr_len, int flags) | |
583 | { | |
584 | struct sock *sk = sock->sk; | |
90719dbe | 585 | struct net_device *dev; |
1da177e4 LT |
586 | struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr; |
587 | struct pppox_sock *po = pppox_sk(sk); | |
588 | int error; | |
589 | ||
590 | lock_sock(sk); | |
591 | ||
592 | error = -EINVAL; | |
593 | if (sp->sa_protocol != PX_PROTO_OE) | |
594 | goto end; | |
595 | ||
596 | /* Check for already bound sockets */ | |
597 | error = -EBUSY; | |
6aba9158 CG |
598 | if ((sk->sk_state & PPPOX_CONNECTED) && |
599 | stage_session(sp->sa_addr.pppoe.sid)) | |
1da177e4 LT |
600 | goto end; |
601 | ||
602 | /* Check for already disconnected sockets, on attempts to disconnect */ | |
603 | error = -EALREADY; | |
6aba9158 CG |
604 | if ((sk->sk_state & PPPOX_DEAD) && |
605 | !stage_session(sp->sa_addr.pppoe.sid)) | |
1da177e4 LT |
606 | goto end; |
607 | ||
608 | error = 0; | |
1da177e4 | 609 | |
6aba9158 CG |
610 | /* Delete the old binding */ |
611 | if (stage_session(po->pppoe_pa.sid)) { | |
612 | pppox_unbind_sock(sk); | |
613 | delete_item(po->pppoe_pa.sid, po->pppoe_pa.remote, po->pppoe_ifindex); | |
614 | if (po->pppoe_dev) | |
1da177e4 | 615 | dev_put(po->pppoe_dev); |
1da177e4 LT |
616 | memset(sk_pppox(po) + 1, 0, |
617 | sizeof(struct pppox_sock) - sizeof(struct sock)); | |
1da177e4 LT |
618 | sk->sk_state = PPPOX_NONE; |
619 | } | |
620 | ||
6aba9158 CG |
621 | /* Re-bind in session stage only */ |
622 | if (stage_session(sp->sa_addr.pppoe.sid)) { | |
881d966b | 623 | dev = dev_get_by_name(&init_net, sp->sa_addr.pppoe.dev); |
1da177e4 LT |
624 | |
625 | error = -ENODEV; | |
626 | if (!dev) | |
627 | goto end; | |
628 | ||
629 | po->pppoe_dev = dev; | |
6f30e186 | 630 | po->pppoe_ifindex = dev->ifindex; |
1da177e4 | 631 | |
74b885cf | 632 | write_lock_bh(&pppoe_hash_lock); |
6aba9158 | 633 | if (!(dev->flags & IFF_UP)) { |
74b885cf | 634 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 | 635 | goto err_put; |
74b885cf | 636 | } |
1da177e4 LT |
637 | |
638 | memcpy(&po->pppoe_pa, | |
639 | &sp->sa_addr.pppoe, | |
640 | sizeof(struct pppoe_addr)); | |
641 | ||
74b885cf FZ |
642 | error = __set_item(po); |
643 | write_unlock_bh(&pppoe_hash_lock); | |
1da177e4 LT |
644 | if (error < 0) |
645 | goto err_put; | |
646 | ||
647 | po->chan.hdrlen = (sizeof(struct pppoe_hdr) + | |
648 | dev->hard_header_len); | |
649 | ||
c9aa6895 | 650 | po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr); |
1da177e4 LT |
651 | po->chan.private = sk; |
652 | po->chan.ops = &pppoe_chan_ops; | |
653 | ||
654 | error = ppp_register_channel(&po->chan); | |
655 | if (error) | |
656 | goto err_put; | |
657 | ||
658 | sk->sk_state = PPPOX_CONNECTED; | |
659 | } | |
660 | ||
661 | po->num = sp->sa_addr.pppoe.sid; | |
662 | ||
6aba9158 | 663 | end: |
1da177e4 LT |
664 | release_sock(sk); |
665 | return error; | |
666 | err_put: | |
667 | if (po->pppoe_dev) { | |
668 | dev_put(po->pppoe_dev); | |
669 | po->pppoe_dev = NULL; | |
670 | } | |
671 | goto end; | |
672 | } | |
673 | ||
1da177e4 LT |
674 | static int pppoe_getname(struct socket *sock, struct sockaddr *uaddr, |
675 | int *usockaddr_len, int peer) | |
676 | { | |
677 | int len = sizeof(struct sockaddr_pppox); | |
678 | struct sockaddr_pppox sp; | |
679 | ||
680 | sp.sa_family = AF_PPPOX; | |
681 | sp.sa_protocol = PX_PROTO_OE; | |
682 | memcpy(&sp.sa_addr.pppoe, &pppox_sk(sock->sk)->pppoe_pa, | |
683 | sizeof(struct pppoe_addr)); | |
684 | ||
685 | memcpy(uaddr, &sp, len); | |
686 | ||
687 | *usockaddr_len = len; | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
1da177e4 LT |
692 | static int pppoe_ioctl(struct socket *sock, unsigned int cmd, |
693 | unsigned long arg) | |
694 | { | |
695 | struct sock *sk = sock->sk; | |
696 | struct pppox_sock *po = pppox_sk(sk); | |
86c1dcfc FZ |
697 | int val; |
698 | int err; | |
1da177e4 LT |
699 | |
700 | switch (cmd) { | |
701 | case PPPIOCGMRU: | |
702 | err = -ENXIO; | |
703 | ||
704 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
705 | break; | |
706 | ||
707 | err = -EFAULT; | |
708 | if (put_user(po->pppoe_dev->mtu - | |
709 | sizeof(struct pppoe_hdr) - | |
710 | PPP_HDRLEN, | |
711 | (int __user *) arg)) | |
712 | break; | |
713 | err = 0; | |
714 | break; | |
715 | ||
716 | case PPPIOCSMRU: | |
717 | err = -ENXIO; | |
718 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
719 | break; | |
720 | ||
721 | err = -EFAULT; | |
6aba9158 | 722 | if (get_user(val, (int __user *)arg)) |
1da177e4 LT |
723 | break; |
724 | ||
725 | if (val < (po->pppoe_dev->mtu | |
726 | - sizeof(struct pppoe_hdr) | |
727 | - PPP_HDRLEN)) | |
728 | err = 0; | |
729 | else | |
730 | err = -EINVAL; | |
731 | break; | |
732 | ||
733 | case PPPIOCSFLAGS: | |
734 | err = -EFAULT; | |
6aba9158 | 735 | if (get_user(val, (int __user *)arg)) |
1da177e4 LT |
736 | break; |
737 | err = 0; | |
738 | break; | |
739 | ||
740 | case PPPOEIOCSFWD: | |
741 | { | |
742 | struct pppox_sock *relay_po; | |
743 | ||
744 | err = -EBUSY; | |
745 | if (sk->sk_state & (PPPOX_BOUND | PPPOX_ZOMBIE | PPPOX_DEAD)) | |
746 | break; | |
747 | ||
748 | err = -ENOTCONN; | |
749 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
750 | break; | |
751 | ||
752 | /* PPPoE address from the user specifies an outbound | |
90719dbe | 753 | PPPoE address which frames are forwarded to */ |
1da177e4 LT |
754 | err = -EFAULT; |
755 | if (copy_from_user(&po->pppoe_relay, | |
756 | (void __user *)arg, | |
757 | sizeof(struct sockaddr_pppox))) | |
758 | break; | |
759 | ||
760 | err = -EINVAL; | |
761 | if (po->pppoe_relay.sa_family != AF_PPPOX || | |
6aba9158 | 762 | po->pppoe_relay.sa_protocol != PX_PROTO_OE) |
1da177e4 LT |
763 | break; |
764 | ||
765 | /* Check that the socket referenced by the address | |
766 | actually exists. */ | |
767 | relay_po = get_item_by_addr(&po->pppoe_relay); | |
768 | ||
769 | if (!relay_po) | |
770 | break; | |
771 | ||
772 | sock_put(sk_pppox(relay_po)); | |
773 | sk->sk_state |= PPPOX_RELAY; | |
774 | err = 0; | |
775 | break; | |
776 | } | |
777 | ||
778 | case PPPOEIOCDFWD: | |
779 | err = -EALREADY; | |
780 | if (!(sk->sk_state & PPPOX_RELAY)) | |
781 | break; | |
782 | ||
783 | sk->sk_state &= ~PPPOX_RELAY; | |
784 | err = 0; | |
785 | break; | |
786 | ||
86c1dcfc FZ |
787 | default: |
788 | err = -ENOTTY; | |
789 | } | |
1da177e4 LT |
790 | |
791 | return err; | |
792 | } | |
793 | ||
6aa20a22 | 794 | static int pppoe_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
795 | struct msghdr *m, size_t total_len) |
796 | { | |
bfafb26e | 797 | struct sk_buff *skb; |
1da177e4 LT |
798 | struct sock *sk = sock->sk; |
799 | struct pppox_sock *po = pppox_sk(sk); | |
bfafb26e | 800 | int error; |
1da177e4 LT |
801 | struct pppoe_hdr hdr; |
802 | struct pppoe_hdr *ph; | |
803 | struct net_device *dev; | |
804 | char *start; | |
805 | ||
8aeca8fe | 806 | lock_sock(sk); |
1da177e4 LT |
807 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) { |
808 | error = -ENOTCONN; | |
809 | goto end; | |
810 | } | |
811 | ||
812 | hdr.ver = 1; | |
813 | hdr.type = 1; | |
814 | hdr.code = 0; | |
815 | hdr.sid = po->num; | |
816 | ||
1da177e4 LT |
817 | dev = po->pppoe_dev; |
818 | ||
819 | error = -EMSGSIZE; | |
6aba9158 | 820 | if (total_len > (dev->mtu + dev->hard_header_len)) |
1da177e4 LT |
821 | goto end; |
822 | ||
823 | ||
824 | skb = sock_wmalloc(sk, total_len + dev->hard_header_len + 32, | |
825 | 0, GFP_KERNEL); | |
826 | if (!skb) { | |
827 | error = -ENOMEM; | |
828 | goto end; | |
829 | } | |
830 | ||
831 | /* Reserve space for headers. */ | |
832 | skb_reserve(skb, dev->hard_header_len); | |
c1d2bbe1 | 833 | skb_reset_network_header(skb); |
1da177e4 LT |
834 | |
835 | skb->dev = dev; | |
836 | ||
837 | skb->priority = sk->sk_priority; | |
838 | skb->protocol = __constant_htons(ETH_P_PPP_SES); | |
839 | ||
840 | ph = (struct pppoe_hdr *) skb_put(skb, total_len + sizeof(struct pppoe_hdr)); | |
841 | start = (char *) &ph->tag[0]; | |
842 | ||
843 | error = memcpy_fromiovec(start, m->msg_iov, total_len); | |
844 | ||
845 | if (error < 0) { | |
846 | kfree_skb(skb); | |
847 | goto end; | |
848 | } | |
849 | ||
850 | error = total_len; | |
0c4e8581 SH |
851 | dev_hard_header(skb, dev, ETH_P_PPP_SES, |
852 | po->pppoe_pa.remote, NULL, total_len); | |
1da177e4 LT |
853 | |
854 | memcpy(ph, &hdr, sizeof(struct pppoe_hdr)); | |
855 | ||
856 | ph->length = htons(total_len); | |
857 | ||
858 | dev_queue_xmit(skb); | |
859 | ||
860 | end: | |
861 | release_sock(sk); | |
862 | return error; | |
863 | } | |
864 | ||
1da177e4 LT |
865 | /************************************************************************ |
866 | * | |
867 | * xmit function for internal use. | |
868 | * | |
869 | ***********************************************************************/ | |
870 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb) | |
871 | { | |
872 | struct pppox_sock *po = pppox_sk(sk); | |
873 | struct net_device *dev = po->pppoe_dev; | |
1da177e4 | 874 | struct pppoe_hdr *ph; |
1da177e4 | 875 | int data_len = skb->len; |
1da177e4 LT |
876 | |
877 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) | |
878 | goto abort; | |
879 | ||
1da177e4 LT |
880 | if (!dev) |
881 | goto abort; | |
882 | ||
db7bf6d9 HX |
883 | /* Copy the data if there is no space for the header or if it's |
884 | * read-only. | |
885 | */ | |
d9cc2048 | 886 | if (skb_cow_head(skb, sizeof(*ph) + dev->hard_header_len)) |
db7bf6d9 | 887 | goto abort; |
1da177e4 | 888 | |
9355ec23 | 889 | __skb_push(skb, sizeof(*ph)); |
db7bf6d9 | 890 | skb_reset_network_header(skb); |
1da177e4 | 891 | |
9355ec23 HX |
892 | ph = pppoe_hdr(skb); |
893 | ph->ver = 1; | |
894 | ph->type = 1; | |
895 | ph->code = 0; | |
896 | ph->sid = po->num; | |
897 | ph->length = htons(data_len); | |
898 | ||
899 | skb->protocol = __constant_htons(ETH_P_PPP_SES); | |
db7bf6d9 | 900 | skb->dev = dev; |
1da177e4 | 901 | |
0c4e8581 SH |
902 | dev_hard_header(skb, dev, ETH_P_PPP_SES, |
903 | po->pppoe_pa.remote, NULL, data_len); | |
1da177e4 | 904 | |
21d0c833 | 905 | dev_queue_xmit(skb); |
1da177e4 | 906 | |
1da177e4 LT |
907 | return 1; |
908 | ||
909 | abort: | |
db7bf6d9 HX |
910 | kfree_skb(skb); |
911 | return 1; | |
1da177e4 LT |
912 | } |
913 | ||
1da177e4 LT |
914 | /************************************************************************ |
915 | * | |
916 | * xmit function called by generic PPP driver | |
917 | * sends PPP frame over PPPoE socket | |
918 | * | |
919 | ***********************************************************************/ | |
920 | static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb) | |
921 | { | |
922 | struct sock *sk = (struct sock *) chan->private; | |
923 | return __pppoe_xmit(sk, skb); | |
924 | } | |
925 | ||
6aa20a22 JG |
926 | static struct ppp_channel_ops pppoe_chan_ops = { |
927 | .start_xmit = pppoe_xmit, | |
1da177e4 LT |
928 | }; |
929 | ||
930 | static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock, | |
931 | struct msghdr *m, size_t total_len, int flags) | |
932 | { | |
933 | struct sock *sk = sock->sk; | |
bfafb26e | 934 | struct sk_buff *skb; |
1da177e4 | 935 | int error = 0; |
1da177e4 LT |
936 | |
937 | if (sk->sk_state & PPPOX_BOUND) { | |
938 | error = -EIO; | |
939 | goto end; | |
940 | } | |
941 | ||
942 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
943 | flags & MSG_DONTWAIT, &error); | |
944 | ||
bfafb26e | 945 | if (error < 0) |
1da177e4 | 946 | goto end; |
1da177e4 LT |
947 | |
948 | m->msg_namelen = 0; | |
949 | ||
950 | if (skb) { | |
2645a3c3 | 951 | total_len = min_t(size_t, total_len, skb->len); |
392fdb0e | 952 | error = skb_copy_datagram_iovec(skb, 0, m->msg_iov, total_len); |
797659fb | 953 | if (error == 0) |
392fdb0e | 954 | error = total_len; |
1da177e4 LT |
955 | } |
956 | ||
797659fb | 957 | kfree_skb(skb); |
1da177e4 LT |
958 | end: |
959 | return error; | |
960 | } | |
961 | ||
962 | #ifdef CONFIG_PROC_FS | |
963 | static int pppoe_seq_show(struct seq_file *seq, void *v) | |
964 | { | |
965 | struct pppox_sock *po; | |
966 | char *dev_name; | |
967 | ||
968 | if (v == SEQ_START_TOKEN) { | |
969 | seq_puts(seq, "Id Address Device\n"); | |
970 | goto out; | |
971 | } | |
972 | ||
973 | po = v; | |
974 | dev_name = po->pppoe_pa.dev; | |
975 | ||
e174961c JB |
976 | seq_printf(seq, "%08X %pM %8s\n", |
977 | po->pppoe_pa.sid, po->pppoe_pa.remote, dev_name); | |
1da177e4 LT |
978 | out: |
979 | return 0; | |
980 | } | |
981 | ||
982 | static __inline__ struct pppox_sock *pppoe_get_idx(loff_t pos) | |
983 | { | |
bfafb26e | 984 | struct pppox_sock *po; |
6aba9158 | 985 | int i; |
1da177e4 | 986 | |
6aba9158 | 987 | for (i = 0; i < PPPOE_HASH_SIZE; i++) { |
1da177e4 LT |
988 | po = item_hash_table[i]; |
989 | while (po) { | |
990 | if (!pos--) | |
991 | goto out; | |
992 | po = po->next; | |
993 | } | |
994 | } | |
995 | out: | |
996 | return po; | |
997 | } | |
998 | ||
999 | static void *pppoe_seq_start(struct seq_file *seq, loff_t *pos) | |
3c582b30 | 1000 | __acquires(pppoe_hash_lock) |
1da177e4 LT |
1001 | { |
1002 | loff_t l = *pos; | |
1003 | ||
1004 | read_lock_bh(&pppoe_hash_lock); | |
1005 | return l ? pppoe_get_idx(--l) : SEQ_START_TOKEN; | |
1006 | } | |
1007 | ||
1008 | static void *pppoe_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1009 | { | |
1010 | struct pppox_sock *po; | |
1011 | ||
1012 | ++*pos; | |
1013 | if (v == SEQ_START_TOKEN) { | |
1014 | po = pppoe_get_idx(0); | |
1015 | goto out; | |
1016 | } | |
1017 | po = v; | |
6aa20a22 | 1018 | if (po->next) |
1da177e4 LT |
1019 | po = po->next; |
1020 | else { | |
1021 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); | |
1022 | ||
1023 | while (++hash < PPPOE_HASH_SIZE) { | |
1024 | po = item_hash_table[hash]; | |
1025 | if (po) | |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | out: | |
1030 | return po; | |
1031 | } | |
1032 | ||
1033 | static void pppoe_seq_stop(struct seq_file *seq, void *v) | |
3c582b30 | 1034 | __releases(pppoe_hash_lock) |
1da177e4 LT |
1035 | { |
1036 | read_unlock_bh(&pppoe_hash_lock); | |
1037 | } | |
1038 | ||
4101dec9 | 1039 | static const struct seq_operations pppoe_seq_ops = { |
1da177e4 LT |
1040 | .start = pppoe_seq_start, |
1041 | .next = pppoe_seq_next, | |
1042 | .stop = pppoe_seq_stop, | |
1043 | .show = pppoe_seq_show, | |
1044 | }; | |
1045 | ||
1046 | static int pppoe_seq_open(struct inode *inode, struct file *file) | |
1047 | { | |
1048 | return seq_open(file, &pppoe_seq_ops); | |
1049 | } | |
1050 | ||
d54b1fdb | 1051 | static const struct file_operations pppoe_seq_fops = { |
1da177e4 LT |
1052 | .owner = THIS_MODULE, |
1053 | .open = pppoe_seq_open, | |
1054 | .read = seq_read, | |
1055 | .llseek = seq_lseek, | |
1056 | .release = seq_release, | |
1057 | }; | |
1058 | ||
1059 | static int __init pppoe_proc_init(void) | |
1060 | { | |
1061 | struct proc_dir_entry *p; | |
1062 | ||
a95609cb | 1063 | p = proc_net_fops_create(&init_net, "pppoe", S_IRUGO, &pppoe_seq_fops); |
1da177e4 LT |
1064 | if (!p) |
1065 | return -ENOMEM; | |
1da177e4 LT |
1066 | return 0; |
1067 | } | |
1068 | #else /* CONFIG_PROC_FS */ | |
1069 | static inline int pppoe_proc_init(void) { return 0; } | |
1070 | #endif /* CONFIG_PROC_FS */ | |
1071 | ||
17ba15fb | 1072 | static const struct proto_ops pppoe_ops = { |
6aba9158 CG |
1073 | .family = AF_PPPOX, |
1074 | .owner = THIS_MODULE, | |
1075 | .release = pppoe_release, | |
1076 | .bind = sock_no_bind, | |
1077 | .connect = pppoe_connect, | |
1078 | .socketpair = sock_no_socketpair, | |
1079 | .accept = sock_no_accept, | |
1080 | .getname = pppoe_getname, | |
1081 | .poll = datagram_poll, | |
1082 | .listen = sock_no_listen, | |
1083 | .shutdown = sock_no_shutdown, | |
1084 | .setsockopt = sock_no_setsockopt, | |
1085 | .getsockopt = sock_no_getsockopt, | |
1086 | .sendmsg = pppoe_sendmsg, | |
1087 | .recvmsg = pppoe_recvmsg, | |
1088 | .mmap = sock_no_mmap, | |
1089 | .ioctl = pppox_ioctl, | |
1da177e4 LT |
1090 | }; |
1091 | ||
1092 | static struct pppox_proto pppoe_proto = { | |
6aba9158 CG |
1093 | .create = pppoe_create, |
1094 | .ioctl = pppoe_ioctl, | |
1095 | .owner = THIS_MODULE, | |
1da177e4 LT |
1096 | }; |
1097 | ||
1da177e4 LT |
1098 | static int __init pppoe_init(void) |
1099 | { | |
1100 | int err = proto_register(&pppoe_sk_proto, 0); | |
1101 | ||
1102 | if (err) | |
1103 | goto out; | |
1104 | ||
6aba9158 | 1105 | err = register_pppox_proto(PX_PROTO_OE, &pppoe_proto); |
1da177e4 LT |
1106 | if (err) |
1107 | goto out_unregister_pppoe_proto; | |
1108 | ||
1109 | err = pppoe_proc_init(); | |
1110 | if (err) | |
1111 | goto out_unregister_pppox_proto; | |
6aa20a22 | 1112 | |
1da177e4 LT |
1113 | dev_add_pack(&pppoes_ptype); |
1114 | dev_add_pack(&pppoed_ptype); | |
1115 | register_netdevice_notifier(&pppoe_notifier); | |
1116 | out: | |
1117 | return err; | |
1118 | out_unregister_pppox_proto: | |
1119 | unregister_pppox_proto(PX_PROTO_OE); | |
1120 | out_unregister_pppoe_proto: | |
1121 | proto_unregister(&pppoe_sk_proto); | |
1122 | goto out; | |
1123 | } | |
1124 | ||
1125 | static void __exit pppoe_exit(void) | |
1126 | { | |
1127 | unregister_pppox_proto(PX_PROTO_OE); | |
1128 | dev_remove_pack(&pppoes_ptype); | |
1129 | dev_remove_pack(&pppoed_ptype); | |
1130 | unregister_netdevice_notifier(&pppoe_notifier); | |
457c4cbc | 1131 | remove_proc_entry("pppoe", init_net.proc_net); |
1da177e4 LT |
1132 | proto_unregister(&pppoe_sk_proto); |
1133 | } | |
1134 | ||
1135 | module_init(pppoe_init); | |
1136 | module_exit(pppoe_exit); | |
1137 | ||
1138 | MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>"); | |
1139 | MODULE_DESCRIPTION("PPP over Ethernet driver"); | |
1140 | MODULE_LICENSE("GPL"); | |
1141 | MODULE_ALIAS_NETPROTO(PF_PPPOX); |