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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 | |
87 | #define PPPOE_HASH_SIZE (1<<PPPOE_HASH_BITS) | |
88 | ||
89 | static struct ppp_channel_ops pppoe_chan_ops; | |
90 | ||
91 | static int pppoe_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); | |
92 | static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb); | |
93 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb); | |
94 | ||
17ba15fb | 95 | static const struct proto_ops pppoe_ops; |
1da177e4 LT |
96 | static DEFINE_RWLOCK(pppoe_hash_lock); |
97 | ||
98 | static struct ppp_channel_ops pppoe_chan_ops; | |
99 | ||
100 | static inline int cmp_2_addr(struct pppoe_addr *a, struct pppoe_addr *b) | |
101 | { | |
102 | return (a->sid == b->sid && | |
103 | (memcmp(a->remote, b->remote, ETH_ALEN) == 0)); | |
104 | } | |
105 | ||
b963dc1d | 106 | static inline int cmp_addr(struct pppoe_addr *a, __be16 sid, char *addr) |
1da177e4 LT |
107 | { |
108 | return (a->sid == sid && | |
109 | (memcmp(a->remote,addr,ETH_ALEN) == 0)); | |
110 | } | |
111 | ||
f1543f8b FZ |
112 | #if 8%PPPOE_HASH_BITS |
113 | #error 8 must be a multiple of PPPOE_HASH_BITS | |
114 | #endif | |
115 | ||
b963dc1d | 116 | static int hash_item(__be16 sid, unsigned char *addr) |
1da177e4 | 117 | { |
f1543f8b FZ |
118 | unsigned char hash = 0; |
119 | unsigned int i; | |
1da177e4 | 120 | |
f1543f8b FZ |
121 | for (i = 0 ; i < ETH_ALEN ; i++) { |
122 | hash ^= addr[i]; | |
123 | } | |
124 | for (i = 0 ; i < sizeof(sid_t)*8 ; i += 8 ){ | |
b963dc1d | 125 | hash ^= (__force __u32)sid>>i; |
f1543f8b FZ |
126 | } |
127 | for (i = 8 ; (i>>=1) >= PPPOE_HASH_BITS ; ) { | |
128 | hash ^= hash>>i; | |
1da177e4 | 129 | } |
1da177e4 LT |
130 | |
131 | return hash & ( PPPOE_HASH_SIZE - 1 ); | |
132 | } | |
133 | ||
134 | /* zeroed because its in .bss */ | |
135 | static struct pppox_sock *item_hash_table[PPPOE_HASH_SIZE]; | |
136 | ||
137 | /********************************************************************** | |
138 | * | |
139 | * Set/get/delete/rehash items (internal versions) | |
140 | * | |
141 | **********************************************************************/ | |
b963dc1d | 142 | static struct pppox_sock *__get_item(__be16 sid, unsigned char *addr, int ifindex) |
1da177e4 LT |
143 | { |
144 | int hash = hash_item(sid, addr); | |
145 | struct pppox_sock *ret; | |
146 | ||
147 | ret = item_hash_table[hash]; | |
148 | ||
6f30e186 | 149 | while (ret && !(cmp_addr(&ret->pppoe_pa, sid, addr) && ret->pppoe_ifindex == ifindex)) |
1da177e4 LT |
150 | ret = ret->next; |
151 | ||
152 | return ret; | |
153 | } | |
154 | ||
155 | static int __set_item(struct pppox_sock *po) | |
156 | { | |
157 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); | |
158 | struct pppox_sock *ret; | |
159 | ||
160 | ret = item_hash_table[hash]; | |
161 | while (ret) { | |
6f30e186 | 162 | if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) && ret->pppoe_ifindex == po->pppoe_ifindex) |
1da177e4 LT |
163 | return -EALREADY; |
164 | ||
165 | ret = ret->next; | |
166 | } | |
167 | ||
90719dbe FZ |
168 | po->next = item_hash_table[hash]; |
169 | item_hash_table[hash] = po; | |
1da177e4 LT |
170 | |
171 | return 0; | |
172 | } | |
173 | ||
b963dc1d | 174 | static struct pppox_sock *__delete_item(__be16 sid, char *addr, int ifindex) |
1da177e4 LT |
175 | { |
176 | int hash = hash_item(sid, addr); | |
177 | struct pppox_sock *ret, **src; | |
178 | ||
179 | ret = item_hash_table[hash]; | |
180 | src = &item_hash_table[hash]; | |
181 | ||
182 | while (ret) { | |
6f30e186 | 183 | if (cmp_addr(&ret->pppoe_pa, sid, addr) && ret->pppoe_ifindex == ifindex) { |
1da177e4 LT |
184 | *src = ret->next; |
185 | break; | |
186 | } | |
187 | ||
188 | src = &ret->next; | |
189 | ret = ret->next; | |
190 | } | |
191 | ||
192 | return ret; | |
193 | } | |
194 | ||
195 | /********************************************************************** | |
196 | * | |
197 | * Set/get/delete/rehash items | |
198 | * | |
199 | **********************************************************************/ | |
b963dc1d | 200 | static inline struct pppox_sock *get_item(__be16 sid, |
90719dbe | 201 | unsigned char *addr, int ifindex) |
1da177e4 LT |
202 | { |
203 | struct pppox_sock *po; | |
204 | ||
205 | read_lock_bh(&pppoe_hash_lock); | |
90719dbe | 206 | po = __get_item(sid, addr, ifindex); |
1da177e4 LT |
207 | if (po) |
208 | sock_hold(sk_pppox(po)); | |
209 | read_unlock_bh(&pppoe_hash_lock); | |
210 | ||
211 | return po; | |
212 | } | |
213 | ||
214 | static inline struct pppox_sock *get_item_by_addr(struct sockaddr_pppox *sp) | |
215 | { | |
bfafb26e | 216 | struct net_device *dev; |
90719dbe FZ |
217 | int ifindex; |
218 | ||
881d966b | 219 | dev = dev_get_by_name(&init_net, sp->sa_addr.pppoe.dev); |
90719dbe FZ |
220 | if(!dev) |
221 | return NULL; | |
222 | ifindex = dev->ifindex; | |
223 | dev_put(dev); | |
224 | return get_item(sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote, ifindex); | |
1da177e4 LT |
225 | } |
226 | ||
b963dc1d | 227 | static inline struct pppox_sock *delete_item(__be16 sid, char *addr, int ifindex) |
1da177e4 LT |
228 | { |
229 | struct pppox_sock *ret; | |
230 | ||
231 | write_lock_bh(&pppoe_hash_lock); | |
90719dbe | 232 | ret = __delete_item(sid, addr, ifindex); |
1da177e4 LT |
233 | write_unlock_bh(&pppoe_hash_lock); |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | ||
239 | ||
240 | /*************************************************************************** | |
241 | * | |
242 | * Handler for device events. | |
243 | * Certain device events require that sockets be unconnected. | |
244 | * | |
245 | **************************************************************************/ | |
246 | ||
247 | static void pppoe_flush_dev(struct net_device *dev) | |
248 | { | |
249 | int hash; | |
1da177e4 LT |
250 | BUG_ON(dev == NULL); |
251 | ||
42dc9cd5 | 252 | write_lock_bh(&pppoe_hash_lock); |
1da177e4 LT |
253 | for (hash = 0; hash < PPPOE_HASH_SIZE; hash++) { |
254 | struct pppox_sock *po = item_hash_table[hash]; | |
255 | ||
256 | while (po != NULL) { | |
42dc9cd5 MO |
257 | struct sock *sk = sk_pppox(po); |
258 | if (po->pppoe_dev != dev) { | |
259 | po = po->next; | |
260 | continue; | |
261 | } | |
262 | po->pppoe_dev = NULL; | |
263 | dev_put(dev); | |
1da177e4 | 264 | |
1da177e4 | 265 | |
42dc9cd5 MO |
266 | /* We always grab the socket lock, followed by the |
267 | * pppoe_hash_lock, in that order. Since we should | |
268 | * hold the sock lock while doing any unbinding, | |
269 | * we need to release the lock we're holding. | |
270 | * Hold a reference to the sock so it doesn't disappear | |
271 | * as we're jumping between locks. | |
272 | */ | |
1da177e4 | 273 | |
42dc9cd5 | 274 | sock_hold(sk); |
1da177e4 | 275 | |
42dc9cd5 MO |
276 | write_unlock_bh(&pppoe_hash_lock); |
277 | lock_sock(sk); | |
1da177e4 | 278 | |
42dc9cd5 MO |
279 | if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND)) { |
280 | pppox_unbind_sock(sk); | |
281 | sk->sk_state = PPPOX_ZOMBIE; | |
282 | sk->sk_state_change(sk); | |
283 | } | |
1da177e4 | 284 | |
42dc9cd5 MO |
285 | release_sock(sk); |
286 | sock_put(sk); | |
1da177e4 | 287 | |
42dc9cd5 MO |
288 | /* Restart scan at the beginning of this hash chain. |
289 | * While the lock was dropped the chain contents may | |
290 | * have changed. | |
291 | */ | |
292 | write_lock_bh(&pppoe_hash_lock); | |
293 | po = item_hash_table[hash]; | |
1da177e4 LT |
294 | } |
295 | } | |
42dc9cd5 | 296 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 LT |
297 | } |
298 | ||
299 | static int pppoe_device_event(struct notifier_block *this, | |
300 | unsigned long event, void *ptr) | |
301 | { | |
302 | struct net_device *dev = (struct net_device *) ptr; | |
303 | ||
c346dca1 | 304 | if (dev_net(dev) != &init_net) |
e9dc8653 EB |
305 | return NOTIFY_DONE; |
306 | ||
1da177e4 LT |
307 | /* Only look at sockets that are using this specific device. */ |
308 | switch (event) { | |
309 | case NETDEV_CHANGEMTU: | |
310 | /* A change in mtu is a bad thing, requiring | |
311 | * LCP re-negotiation. | |
312 | */ | |
313 | ||
314 | case NETDEV_GOING_DOWN: | |
315 | case NETDEV_DOWN: | |
316 | /* Find every socket on this device and kill it. */ | |
317 | pppoe_flush_dev(dev); | |
318 | break; | |
319 | ||
320 | default: | |
321 | break; | |
322 | }; | |
323 | ||
324 | return NOTIFY_DONE; | |
325 | } | |
326 | ||
327 | ||
328 | static struct notifier_block pppoe_notifier = { | |
329 | .notifier_call = pppoe_device_event, | |
330 | }; | |
331 | ||
332 | ||
333 | /************************************************************************ | |
334 | * | |
335 | * Do the real work of receiving a PPPoE Session frame. | |
336 | * | |
337 | ***********************************************************************/ | |
338 | static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb) | |
339 | { | |
340 | struct pppox_sock *po = pppox_sk(sk); | |
bfafb26e | 341 | struct pppox_sock *relay_po; |
1da177e4 LT |
342 | |
343 | if (sk->sk_state & PPPOX_BOUND) { | |
797659fb | 344 | struct pppoe_hdr *ph = pppoe_hdr(skb); |
1da177e4 | 345 | int len = ntohs(ph->length); |
cbb042f9 | 346 | skb_pull_rcsum(skb, sizeof(struct pppoe_hdr)); |
1da177e4 LT |
347 | if (pskb_trim_rcsum(skb, len)) |
348 | goto abort_kfree; | |
349 | ||
350 | ppp_input(&po->chan, skb); | |
351 | } else if (sk->sk_state & PPPOX_RELAY) { | |
352 | relay_po = get_item_by_addr(&po->pppoe_relay); | |
353 | ||
354 | if (relay_po == NULL) | |
355 | goto abort_kfree; | |
356 | ||
357 | if ((sk_pppox(relay_po)->sk_state & PPPOX_CONNECTED) == 0) | |
358 | goto abort_put; | |
359 | ||
360 | skb_pull(skb, sizeof(struct pppoe_hdr)); | |
361 | if (!__pppoe_xmit(sk_pppox(relay_po), skb)) | |
362 | goto abort_put; | |
363 | } else { | |
364 | if (sock_queue_rcv_skb(sk, skb)) | |
365 | goto abort_kfree; | |
366 | } | |
367 | ||
368 | return NET_RX_SUCCESS; | |
369 | ||
370 | abort_put: | |
371 | sock_put(sk_pppox(relay_po)); | |
372 | ||
373 | abort_kfree: | |
374 | kfree_skb(skb); | |
375 | return NET_RX_DROP; | |
376 | } | |
377 | ||
378 | /************************************************************************ | |
379 | * | |
380 | * Receive wrapper called in BH context. | |
381 | * | |
382 | ***********************************************************************/ | |
383 | static int pppoe_rcv(struct sk_buff *skb, | |
384 | struct net_device *dev, | |
f2ccd8fa DM |
385 | struct packet_type *pt, |
386 | struct net_device *orig_dev) | |
1da177e4 LT |
387 | |
388 | { | |
389 | struct pppoe_hdr *ph; | |
390 | struct pppox_sock *po; | |
1da177e4 | 391 | |
6aa20a22 | 392 | if (!(skb = skb_share_check(skb, GFP_ATOMIC))) |
1da177e4 LT |
393 | goto out; |
394 | ||
c346dca1 | 395 | if (dev_net(dev) != &init_net) |
e730c155 EB |
396 | goto drop; |
397 | ||
31bac444 HX |
398 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) |
399 | goto drop; | |
400 | ||
797659fb | 401 | ph = pppoe_hdr(skb); |
1da177e4 | 402 | |
b963dc1d | 403 | po = get_item(ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
6aa20a22 | 404 | if (po != NULL) |
58a5a7b9 | 405 | return sk_receive_skb(sk_pppox(po), skb, 0); |
1da177e4 LT |
406 | drop: |
407 | kfree_skb(skb); | |
408 | out: | |
409 | return NET_RX_DROP; | |
410 | } | |
411 | ||
412 | /************************************************************************ | |
413 | * | |
414 | * Receive a PPPoE Discovery frame. | |
415 | * This is solely for detection of PADT frames | |
416 | * | |
417 | ***********************************************************************/ | |
418 | static int pppoe_disc_rcv(struct sk_buff *skb, | |
419 | struct net_device *dev, | |
f2ccd8fa DM |
420 | struct packet_type *pt, |
421 | struct net_device *orig_dev) | |
1da177e4 LT |
422 | |
423 | { | |
424 | struct pppoe_hdr *ph; | |
425 | struct pppox_sock *po; | |
426 | ||
c346dca1 | 427 | if (dev_net(dev) != &init_net) |
e730c155 EB |
428 | goto abort; |
429 | ||
1da177e4 LT |
430 | if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr))) |
431 | goto abort; | |
432 | ||
6aa20a22 | 433 | if (!(skb = skb_share_check(skb, GFP_ATOMIC))) |
1da177e4 LT |
434 | goto out; |
435 | ||
797659fb | 436 | ph = pppoe_hdr(skb); |
1da177e4 LT |
437 | if (ph->code != PADT_CODE) |
438 | goto abort; | |
439 | ||
b963dc1d | 440 | po = get_item(ph->sid, eth_hdr(skb)->h_source, dev->ifindex); |
1da177e4 LT |
441 | if (po) { |
442 | struct sock *sk = sk_pppox(po); | |
443 | ||
444 | bh_lock_sock(sk); | |
445 | ||
446 | /* If the user has locked the socket, just ignore | |
447 | * the packet. With the way two rcv protocols hook into | |
448 | * one socket family type, we cannot (easily) distinguish | |
449 | * what kind of SKB it is during backlog rcv. | |
450 | */ | |
451 | if (sock_owned_by_user(sk) == 0) { | |
452 | /* We're no longer connect at the PPPOE layer, | |
453 | * and must wait for ppp channel to disconnect us. | |
454 | */ | |
455 | sk->sk_state = PPPOX_ZOMBIE; | |
456 | } | |
457 | ||
458 | bh_unlock_sock(sk); | |
459 | sock_put(sk); | |
460 | } | |
461 | ||
462 | abort: | |
463 | kfree_skb(skb); | |
464 | out: | |
465 | return NET_RX_SUCCESS; /* Lies... :-) */ | |
466 | } | |
467 | ||
468 | static struct packet_type pppoes_ptype = { | |
469 | .type = __constant_htons(ETH_P_PPP_SES), | |
470 | .func = pppoe_rcv, | |
471 | }; | |
472 | ||
473 | static struct packet_type pppoed_ptype = { | |
474 | .type = __constant_htons(ETH_P_PPP_DISC), | |
475 | .func = pppoe_disc_rcv, | |
476 | }; | |
477 | ||
478 | static struct proto pppoe_sk_proto = { | |
479 | .name = "PPPOE", | |
480 | .owner = THIS_MODULE, | |
481 | .obj_size = sizeof(struct pppox_sock), | |
482 | }; | |
483 | ||
484 | /*********************************************************************** | |
485 | * | |
486 | * Initialize a new struct sock. | |
487 | * | |
488 | **********************************************************************/ | |
1b8d7ae4 | 489 | static int pppoe_create(struct net *net, struct socket *sock) |
1da177e4 LT |
490 | { |
491 | int error = -ENOMEM; | |
492 | struct sock *sk; | |
493 | ||
6257ff21 | 494 | sk = sk_alloc(net, PF_PPPOX, GFP_KERNEL, &pppoe_sk_proto); |
1da177e4 LT |
495 | if (!sk) |
496 | goto out; | |
497 | ||
498 | sock_init_data(sock, sk); | |
499 | ||
500 | sock->state = SS_UNCONNECTED; | |
501 | sock->ops = &pppoe_ops; | |
502 | ||
503 | sk->sk_backlog_rcv = pppoe_rcv_core; | |
504 | sk->sk_state = PPPOX_NONE; | |
505 | sk->sk_type = SOCK_STREAM; | |
506 | sk->sk_family = PF_PPPOX; | |
507 | sk->sk_protocol = PX_PROTO_OE; | |
508 | ||
509 | error = 0; | |
510 | out: return error; | |
511 | } | |
512 | ||
513 | static int pppoe_release(struct socket *sock) | |
514 | { | |
515 | struct sock *sk = sock->sk; | |
516 | struct pppox_sock *po; | |
1da177e4 LT |
517 | |
518 | if (!sk) | |
519 | return 0; | |
520 | ||
42dc9cd5 MO |
521 | lock_sock(sk); |
522 | if (sock_flag(sk, SOCK_DEAD)){ | |
523 | release_sock(sk); | |
1da177e4 | 524 | return -EBADF; |
42dc9cd5 | 525 | } |
1da177e4 LT |
526 | |
527 | pppox_unbind_sock(sk); | |
528 | ||
529 | /* Signal the death of the socket. */ | |
530 | sk->sk_state = PPPOX_DEAD; | |
531 | ||
42dc9cd5 MO |
532 | |
533 | /* Write lock on hash lock protects the entire "po" struct from | |
534 | * concurrent updates via pppoe_flush_dev. The "po" struct should | |
535 | * be considered part of the hash table contents, thus protected | |
536 | * by the hash table lock */ | |
537 | write_lock_bh(&pppoe_hash_lock); | |
538 | ||
1da177e4 LT |
539 | po = pppox_sk(sk); |
540 | if (po->pppoe_pa.sid) { | |
42dc9cd5 MO |
541 | __delete_item(po->pppoe_pa.sid, |
542 | po->pppoe_pa.remote, po->pppoe_ifindex); | |
1da177e4 LT |
543 | } |
544 | ||
42dc9cd5 | 545 | if (po->pppoe_dev) { |
1da177e4 | 546 | dev_put(po->pppoe_dev); |
42dc9cd5 MO |
547 | po->pppoe_dev = NULL; |
548 | } | |
1da177e4 | 549 | |
42dc9cd5 | 550 | write_unlock_bh(&pppoe_hash_lock); |
1da177e4 LT |
551 | |
552 | sock_orphan(sk); | |
553 | sock->sk = NULL; | |
554 | ||
555 | skb_queue_purge(&sk->sk_receive_queue); | |
42dc9cd5 | 556 | release_sock(sk); |
1da177e4 LT |
557 | sock_put(sk); |
558 | ||
bfafb26e | 559 | return 0; |
1da177e4 LT |
560 | } |
561 | ||
562 | ||
563 | static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr, | |
564 | int sockaddr_len, int flags) | |
565 | { | |
566 | struct sock *sk = sock->sk; | |
90719dbe | 567 | struct net_device *dev; |
1da177e4 LT |
568 | struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr; |
569 | struct pppox_sock *po = pppox_sk(sk); | |
570 | int error; | |
571 | ||
572 | lock_sock(sk); | |
573 | ||
574 | error = -EINVAL; | |
575 | if (sp->sa_protocol != PX_PROTO_OE) | |
576 | goto end; | |
577 | ||
578 | /* Check for already bound sockets */ | |
579 | error = -EBUSY; | |
580 | if ((sk->sk_state & PPPOX_CONNECTED) && sp->sa_addr.pppoe.sid) | |
581 | goto end; | |
582 | ||
583 | /* Check for already disconnected sockets, on attempts to disconnect */ | |
584 | error = -EALREADY; | |
585 | if ((sk->sk_state & PPPOX_DEAD) && !sp->sa_addr.pppoe.sid ) | |
586 | goto end; | |
587 | ||
588 | error = 0; | |
589 | if (po->pppoe_pa.sid) { | |
590 | pppox_unbind_sock(sk); | |
591 | ||
592 | /* Delete the old binding */ | |
6f30e186 | 593 | delete_item(po->pppoe_pa.sid,po->pppoe_pa.remote,po->pppoe_ifindex); |
1da177e4 LT |
594 | |
595 | if(po->pppoe_dev) | |
596 | dev_put(po->pppoe_dev); | |
597 | ||
598 | memset(sk_pppox(po) + 1, 0, | |
599 | sizeof(struct pppox_sock) - sizeof(struct sock)); | |
600 | ||
601 | sk->sk_state = PPPOX_NONE; | |
602 | } | |
603 | ||
604 | /* Don't re-bind if sid==0 */ | |
605 | if (sp->sa_addr.pppoe.sid != 0) { | |
881d966b | 606 | dev = dev_get_by_name(&init_net, sp->sa_addr.pppoe.dev); |
1da177e4 LT |
607 | |
608 | error = -ENODEV; | |
609 | if (!dev) | |
610 | goto end; | |
611 | ||
612 | po->pppoe_dev = dev; | |
6f30e186 | 613 | po->pppoe_ifindex = dev->ifindex; |
1da177e4 | 614 | |
74b885cf FZ |
615 | write_lock_bh(&pppoe_hash_lock); |
616 | if (!(dev->flags & IFF_UP)){ | |
617 | write_unlock_bh(&pppoe_hash_lock); | |
1da177e4 | 618 | goto err_put; |
74b885cf | 619 | } |
1da177e4 LT |
620 | |
621 | memcpy(&po->pppoe_pa, | |
622 | &sp->sa_addr.pppoe, | |
623 | sizeof(struct pppoe_addr)); | |
624 | ||
74b885cf FZ |
625 | error = __set_item(po); |
626 | write_unlock_bh(&pppoe_hash_lock); | |
1da177e4 LT |
627 | if (error < 0) |
628 | goto err_put; | |
629 | ||
630 | po->chan.hdrlen = (sizeof(struct pppoe_hdr) + | |
631 | dev->hard_header_len); | |
632 | ||
c9aa6895 | 633 | po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr); |
1da177e4 LT |
634 | po->chan.private = sk; |
635 | po->chan.ops = &pppoe_chan_ops; | |
636 | ||
637 | error = ppp_register_channel(&po->chan); | |
638 | if (error) | |
639 | goto err_put; | |
640 | ||
641 | sk->sk_state = PPPOX_CONNECTED; | |
642 | } | |
643 | ||
644 | po->num = sp->sa_addr.pppoe.sid; | |
645 | ||
646 | end: | |
647 | release_sock(sk); | |
648 | return error; | |
649 | err_put: | |
650 | if (po->pppoe_dev) { | |
651 | dev_put(po->pppoe_dev); | |
652 | po->pppoe_dev = NULL; | |
653 | } | |
654 | goto end; | |
655 | } | |
656 | ||
657 | ||
658 | static int pppoe_getname(struct socket *sock, struct sockaddr *uaddr, | |
659 | int *usockaddr_len, int peer) | |
660 | { | |
661 | int len = sizeof(struct sockaddr_pppox); | |
662 | struct sockaddr_pppox sp; | |
663 | ||
664 | sp.sa_family = AF_PPPOX; | |
665 | sp.sa_protocol = PX_PROTO_OE; | |
666 | memcpy(&sp.sa_addr.pppoe, &pppox_sk(sock->sk)->pppoe_pa, | |
667 | sizeof(struct pppoe_addr)); | |
668 | ||
669 | memcpy(uaddr, &sp, len); | |
670 | ||
671 | *usockaddr_len = len; | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | ||
677 | static int pppoe_ioctl(struct socket *sock, unsigned int cmd, | |
678 | unsigned long arg) | |
679 | { | |
680 | struct sock *sk = sock->sk; | |
681 | struct pppox_sock *po = pppox_sk(sk); | |
86c1dcfc FZ |
682 | int val; |
683 | int err; | |
1da177e4 LT |
684 | |
685 | switch (cmd) { | |
686 | case PPPIOCGMRU: | |
687 | err = -ENXIO; | |
688 | ||
689 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
690 | break; | |
691 | ||
692 | err = -EFAULT; | |
693 | if (put_user(po->pppoe_dev->mtu - | |
694 | sizeof(struct pppoe_hdr) - | |
695 | PPP_HDRLEN, | |
696 | (int __user *) arg)) | |
697 | break; | |
698 | err = 0; | |
699 | break; | |
700 | ||
701 | case PPPIOCSMRU: | |
702 | err = -ENXIO; | |
703 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
704 | break; | |
705 | ||
706 | err = -EFAULT; | |
707 | if (get_user(val,(int __user *) arg)) | |
708 | break; | |
709 | ||
710 | if (val < (po->pppoe_dev->mtu | |
711 | - sizeof(struct pppoe_hdr) | |
712 | - PPP_HDRLEN)) | |
713 | err = 0; | |
714 | else | |
715 | err = -EINVAL; | |
716 | break; | |
717 | ||
718 | case PPPIOCSFLAGS: | |
719 | err = -EFAULT; | |
720 | if (get_user(val, (int __user *) arg)) | |
721 | break; | |
722 | err = 0; | |
723 | break; | |
724 | ||
725 | case PPPOEIOCSFWD: | |
726 | { | |
727 | struct pppox_sock *relay_po; | |
728 | ||
729 | err = -EBUSY; | |
730 | if (sk->sk_state & (PPPOX_BOUND | PPPOX_ZOMBIE | PPPOX_DEAD)) | |
731 | break; | |
732 | ||
733 | err = -ENOTCONN; | |
734 | if (!(sk->sk_state & PPPOX_CONNECTED)) | |
735 | break; | |
736 | ||
737 | /* PPPoE address from the user specifies an outbound | |
90719dbe | 738 | PPPoE address which frames are forwarded to */ |
1da177e4 LT |
739 | err = -EFAULT; |
740 | if (copy_from_user(&po->pppoe_relay, | |
741 | (void __user *)arg, | |
742 | sizeof(struct sockaddr_pppox))) | |
743 | break; | |
744 | ||
745 | err = -EINVAL; | |
746 | if (po->pppoe_relay.sa_family != AF_PPPOX || | |
747 | po->pppoe_relay.sa_protocol!= PX_PROTO_OE) | |
748 | break; | |
749 | ||
750 | /* Check that the socket referenced by the address | |
751 | actually exists. */ | |
752 | relay_po = get_item_by_addr(&po->pppoe_relay); | |
753 | ||
754 | if (!relay_po) | |
755 | break; | |
756 | ||
757 | sock_put(sk_pppox(relay_po)); | |
758 | sk->sk_state |= PPPOX_RELAY; | |
759 | err = 0; | |
760 | break; | |
761 | } | |
762 | ||
763 | case PPPOEIOCDFWD: | |
764 | err = -EALREADY; | |
765 | if (!(sk->sk_state & PPPOX_RELAY)) | |
766 | break; | |
767 | ||
768 | sk->sk_state &= ~PPPOX_RELAY; | |
769 | err = 0; | |
770 | break; | |
771 | ||
86c1dcfc FZ |
772 | default: |
773 | err = -ENOTTY; | |
774 | } | |
1da177e4 LT |
775 | |
776 | return err; | |
777 | } | |
778 | ||
779 | ||
6aa20a22 | 780 | static int pppoe_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
781 | struct msghdr *m, size_t total_len) |
782 | { | |
bfafb26e | 783 | struct sk_buff *skb; |
1da177e4 LT |
784 | struct sock *sk = sock->sk; |
785 | struct pppox_sock *po = pppox_sk(sk); | |
bfafb26e | 786 | int error; |
1da177e4 LT |
787 | struct pppoe_hdr hdr; |
788 | struct pppoe_hdr *ph; | |
789 | struct net_device *dev; | |
790 | char *start; | |
791 | ||
8aeca8fe | 792 | lock_sock(sk); |
1da177e4 LT |
793 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) { |
794 | error = -ENOTCONN; | |
795 | goto end; | |
796 | } | |
797 | ||
798 | hdr.ver = 1; | |
799 | hdr.type = 1; | |
800 | hdr.code = 0; | |
801 | hdr.sid = po->num; | |
802 | ||
1da177e4 LT |
803 | dev = po->pppoe_dev; |
804 | ||
805 | error = -EMSGSIZE; | |
806 | if (total_len > (dev->mtu + dev->hard_header_len)) | |
807 | goto end; | |
808 | ||
809 | ||
810 | skb = sock_wmalloc(sk, total_len + dev->hard_header_len + 32, | |
811 | 0, GFP_KERNEL); | |
812 | if (!skb) { | |
813 | error = -ENOMEM; | |
814 | goto end; | |
815 | } | |
816 | ||
817 | /* Reserve space for headers. */ | |
818 | skb_reserve(skb, dev->hard_header_len); | |
c1d2bbe1 | 819 | skb_reset_network_header(skb); |
1da177e4 LT |
820 | |
821 | skb->dev = dev; | |
822 | ||
823 | skb->priority = sk->sk_priority; | |
824 | skb->protocol = __constant_htons(ETH_P_PPP_SES); | |
825 | ||
826 | ph = (struct pppoe_hdr *) skb_put(skb, total_len + sizeof(struct pppoe_hdr)); | |
827 | start = (char *) &ph->tag[0]; | |
828 | ||
829 | error = memcpy_fromiovec(start, m->msg_iov, total_len); | |
830 | ||
831 | if (error < 0) { | |
832 | kfree_skb(skb); | |
833 | goto end; | |
834 | } | |
835 | ||
836 | error = total_len; | |
0c4e8581 SH |
837 | dev_hard_header(skb, dev, ETH_P_PPP_SES, |
838 | po->pppoe_pa.remote, NULL, total_len); | |
1da177e4 LT |
839 | |
840 | memcpy(ph, &hdr, sizeof(struct pppoe_hdr)); | |
841 | ||
842 | ph->length = htons(total_len); | |
843 | ||
844 | dev_queue_xmit(skb); | |
845 | ||
846 | end: | |
847 | release_sock(sk); | |
848 | return error; | |
849 | } | |
850 | ||
851 | ||
852 | /************************************************************************ | |
853 | * | |
854 | * xmit function for internal use. | |
855 | * | |
856 | ***********************************************************************/ | |
857 | static int __pppoe_xmit(struct sock *sk, struct sk_buff *skb) | |
858 | { | |
859 | struct pppox_sock *po = pppox_sk(sk); | |
860 | struct net_device *dev = po->pppoe_dev; | |
1da177e4 | 861 | struct pppoe_hdr *ph; |
1da177e4 | 862 | int data_len = skb->len; |
1da177e4 LT |
863 | |
864 | if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) | |
865 | goto abort; | |
866 | ||
1da177e4 LT |
867 | if (!dev) |
868 | goto abort; | |
869 | ||
db7bf6d9 HX |
870 | /* Copy the data if there is no space for the header or if it's |
871 | * read-only. | |
872 | */ | |
d9cc2048 | 873 | if (skb_cow_head(skb, sizeof(*ph) + dev->hard_header_len)) |
db7bf6d9 | 874 | goto abort; |
1da177e4 | 875 | |
9355ec23 | 876 | __skb_push(skb, sizeof(*ph)); |
db7bf6d9 | 877 | skb_reset_network_header(skb); |
1da177e4 | 878 | |
9355ec23 HX |
879 | ph = pppoe_hdr(skb); |
880 | ph->ver = 1; | |
881 | ph->type = 1; | |
882 | ph->code = 0; | |
883 | ph->sid = po->num; | |
884 | ph->length = htons(data_len); | |
885 | ||
886 | skb->protocol = __constant_htons(ETH_P_PPP_SES); | |
db7bf6d9 | 887 | skb->dev = dev; |
1da177e4 | 888 | |
0c4e8581 SH |
889 | dev_hard_header(skb, dev, ETH_P_PPP_SES, |
890 | po->pppoe_pa.remote, NULL, data_len); | |
1da177e4 | 891 | |
21d0c833 | 892 | dev_queue_xmit(skb); |
1da177e4 | 893 | |
1da177e4 LT |
894 | return 1; |
895 | ||
896 | abort: | |
db7bf6d9 HX |
897 | kfree_skb(skb); |
898 | return 1; | |
1da177e4 LT |
899 | } |
900 | ||
901 | ||
902 | /************************************************************************ | |
903 | * | |
904 | * xmit function called by generic PPP driver | |
905 | * sends PPP frame over PPPoE socket | |
906 | * | |
907 | ***********************************************************************/ | |
908 | static int pppoe_xmit(struct ppp_channel *chan, struct sk_buff *skb) | |
909 | { | |
910 | struct sock *sk = (struct sock *) chan->private; | |
911 | return __pppoe_xmit(sk, skb); | |
912 | } | |
913 | ||
914 | ||
6aa20a22 JG |
915 | static struct ppp_channel_ops pppoe_chan_ops = { |
916 | .start_xmit = pppoe_xmit, | |
1da177e4 LT |
917 | }; |
918 | ||
919 | static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock, | |
920 | struct msghdr *m, size_t total_len, int flags) | |
921 | { | |
922 | struct sock *sk = sock->sk; | |
bfafb26e | 923 | struct sk_buff *skb; |
1da177e4 | 924 | int error = 0; |
1da177e4 LT |
925 | |
926 | if (sk->sk_state & PPPOX_BOUND) { | |
927 | error = -EIO; | |
928 | goto end; | |
929 | } | |
930 | ||
931 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
932 | flags & MSG_DONTWAIT, &error); | |
933 | ||
bfafb26e | 934 | if (error < 0) |
1da177e4 | 935 | goto end; |
1da177e4 LT |
936 | |
937 | m->msg_namelen = 0; | |
938 | ||
939 | if (skb) { | |
797659fb ACM |
940 | struct pppoe_hdr *ph = pppoe_hdr(skb); |
941 | const int len = ntohs(ph->length); | |
1da177e4 LT |
942 | |
943 | error = memcpy_toiovec(m->msg_iov, (unsigned char *) &ph->tag[0], len); | |
797659fb ACM |
944 | if (error == 0) |
945 | error = len; | |
1da177e4 LT |
946 | } |
947 | ||
797659fb | 948 | kfree_skb(skb); |
1da177e4 LT |
949 | end: |
950 | return error; | |
951 | } | |
952 | ||
953 | #ifdef CONFIG_PROC_FS | |
954 | static int pppoe_seq_show(struct seq_file *seq, void *v) | |
955 | { | |
956 | struct pppox_sock *po; | |
957 | char *dev_name; | |
0795af57 | 958 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
959 | |
960 | if (v == SEQ_START_TOKEN) { | |
961 | seq_puts(seq, "Id Address Device\n"); | |
962 | goto out; | |
963 | } | |
964 | ||
965 | po = v; | |
966 | dev_name = po->pppoe_pa.dev; | |
967 | ||
0795af57 JP |
968 | seq_printf(seq, "%08X %s %8s\n", |
969 | po->pppoe_pa.sid, print_mac(mac, po->pppoe_pa.remote), dev_name); | |
1da177e4 LT |
970 | out: |
971 | return 0; | |
972 | } | |
973 | ||
974 | static __inline__ struct pppox_sock *pppoe_get_idx(loff_t pos) | |
975 | { | |
bfafb26e | 976 | struct pppox_sock *po; |
1da177e4 LT |
977 | int i = 0; |
978 | ||
979 | for (; i < PPPOE_HASH_SIZE; i++) { | |
980 | po = item_hash_table[i]; | |
981 | while (po) { | |
982 | if (!pos--) | |
983 | goto out; | |
984 | po = po->next; | |
985 | } | |
986 | } | |
987 | out: | |
988 | return po; | |
989 | } | |
990 | ||
991 | static void *pppoe_seq_start(struct seq_file *seq, loff_t *pos) | |
3c582b30 | 992 | __acquires(pppoe_hash_lock) |
1da177e4 LT |
993 | { |
994 | loff_t l = *pos; | |
995 | ||
996 | read_lock_bh(&pppoe_hash_lock); | |
997 | return l ? pppoe_get_idx(--l) : SEQ_START_TOKEN; | |
998 | } | |
999 | ||
1000 | static void *pppoe_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1001 | { | |
1002 | struct pppox_sock *po; | |
1003 | ||
1004 | ++*pos; | |
1005 | if (v == SEQ_START_TOKEN) { | |
1006 | po = pppoe_get_idx(0); | |
1007 | goto out; | |
1008 | } | |
1009 | po = v; | |
6aa20a22 | 1010 | if (po->next) |
1da177e4 LT |
1011 | po = po->next; |
1012 | else { | |
1013 | int hash = hash_item(po->pppoe_pa.sid, po->pppoe_pa.remote); | |
1014 | ||
1015 | while (++hash < PPPOE_HASH_SIZE) { | |
1016 | po = item_hash_table[hash]; | |
1017 | if (po) | |
1018 | break; | |
1019 | } | |
1020 | } | |
1021 | out: | |
1022 | return po; | |
1023 | } | |
1024 | ||
1025 | static void pppoe_seq_stop(struct seq_file *seq, void *v) | |
3c582b30 | 1026 | __releases(pppoe_hash_lock) |
1da177e4 LT |
1027 | { |
1028 | read_unlock_bh(&pppoe_hash_lock); | |
1029 | } | |
1030 | ||
1031 | static struct seq_operations pppoe_seq_ops = { | |
1032 | .start = pppoe_seq_start, | |
1033 | .next = pppoe_seq_next, | |
1034 | .stop = pppoe_seq_stop, | |
1035 | .show = pppoe_seq_show, | |
1036 | }; | |
1037 | ||
1038 | static int pppoe_seq_open(struct inode *inode, struct file *file) | |
1039 | { | |
1040 | return seq_open(file, &pppoe_seq_ops); | |
1041 | } | |
1042 | ||
d54b1fdb | 1043 | static const struct file_operations pppoe_seq_fops = { |
1da177e4 LT |
1044 | .owner = THIS_MODULE, |
1045 | .open = pppoe_seq_open, | |
1046 | .read = seq_read, | |
1047 | .llseek = seq_lseek, | |
1048 | .release = seq_release, | |
1049 | }; | |
1050 | ||
1051 | static int __init pppoe_proc_init(void) | |
1052 | { | |
1053 | struct proc_dir_entry *p; | |
1054 | ||
a95609cb | 1055 | p = proc_net_fops_create(&init_net, "pppoe", S_IRUGO, &pppoe_seq_fops); |
1da177e4 LT |
1056 | if (!p) |
1057 | return -ENOMEM; | |
1da177e4 LT |
1058 | return 0; |
1059 | } | |
1060 | #else /* CONFIG_PROC_FS */ | |
1061 | static inline int pppoe_proc_init(void) { return 0; } | |
1062 | #endif /* CONFIG_PROC_FS */ | |
1063 | ||
17ba15fb | 1064 | static const struct proto_ops pppoe_ops = { |
1da177e4 LT |
1065 | .family = AF_PPPOX, |
1066 | .owner = THIS_MODULE, | |
1067 | .release = pppoe_release, | |
1068 | .bind = sock_no_bind, | |
1069 | .connect = pppoe_connect, | |
1070 | .socketpair = sock_no_socketpair, | |
1071 | .accept = sock_no_accept, | |
1072 | .getname = pppoe_getname, | |
1073 | .poll = datagram_poll, | |
1074 | .listen = sock_no_listen, | |
1075 | .shutdown = sock_no_shutdown, | |
1076 | .setsockopt = sock_no_setsockopt, | |
1077 | .getsockopt = sock_no_getsockopt, | |
1078 | .sendmsg = pppoe_sendmsg, | |
1079 | .recvmsg = pppoe_recvmsg, | |
17ba15fb DM |
1080 | .mmap = sock_no_mmap, |
1081 | .ioctl = pppox_ioctl, | |
1da177e4 LT |
1082 | }; |
1083 | ||
1084 | static struct pppox_proto pppoe_proto = { | |
1085 | .create = pppoe_create, | |
1086 | .ioctl = pppoe_ioctl, | |
1087 | .owner = THIS_MODULE, | |
1088 | }; | |
1089 | ||
1090 | ||
1091 | static int __init pppoe_init(void) | |
1092 | { | |
1093 | int err = proto_register(&pppoe_sk_proto, 0); | |
1094 | ||
1095 | if (err) | |
1096 | goto out; | |
1097 | ||
1098 | err = register_pppox_proto(PX_PROTO_OE, &pppoe_proto); | |
1099 | if (err) | |
1100 | goto out_unregister_pppoe_proto; | |
1101 | ||
1102 | err = pppoe_proc_init(); | |
1103 | if (err) | |
1104 | goto out_unregister_pppox_proto; | |
6aa20a22 | 1105 | |
1da177e4 LT |
1106 | dev_add_pack(&pppoes_ptype); |
1107 | dev_add_pack(&pppoed_ptype); | |
1108 | register_netdevice_notifier(&pppoe_notifier); | |
1109 | out: | |
1110 | return err; | |
1111 | out_unregister_pppox_proto: | |
1112 | unregister_pppox_proto(PX_PROTO_OE); | |
1113 | out_unregister_pppoe_proto: | |
1114 | proto_unregister(&pppoe_sk_proto); | |
1115 | goto out; | |
1116 | } | |
1117 | ||
1118 | static void __exit pppoe_exit(void) | |
1119 | { | |
1120 | unregister_pppox_proto(PX_PROTO_OE); | |
1121 | dev_remove_pack(&pppoes_ptype); | |
1122 | dev_remove_pack(&pppoed_ptype); | |
1123 | unregister_netdevice_notifier(&pppoe_notifier); | |
457c4cbc | 1124 | remove_proc_entry("pppoe", init_net.proc_net); |
1da177e4 LT |
1125 | proto_unregister(&pppoe_sk_proto); |
1126 | } | |
1127 | ||
1128 | module_init(pppoe_init); | |
1129 | module_exit(pppoe_exit); | |
1130 | ||
1131 | MODULE_AUTHOR("Michal Ostrowski <mostrows@speakeasy.net>"); | |
1132 | MODULE_DESCRIPTION("PPP over Ethernet driver"); | |
1133 | MODULE_LICENSE("GPL"); | |
1134 | MODULE_ALIAS_NETPROTO(PF_PPPOX); |