Commit | Line | Data |
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1da177e4 LT |
1 | /* net/atm/pppoatm.c - RFC2364 PPP over ATM/AAL5 */ |
2 | ||
3 | /* Copyright 1999-2000 by Mitchell Blank Jr */ | |
4 | /* Based on clip.c; 1995-1999 by Werner Almesberger, EPFL LRC/ICA */ | |
5 | /* And on ppp_async.c; Copyright 1999 Paul Mackerras */ | |
6 | /* And help from Jens Axboe */ | |
7 | ||
8 | /* | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This driver provides the encapsulation and framing for sending | |
15 | * and receiving PPP frames in ATM AAL5 PDUs. | |
16 | */ | |
17 | ||
18 | /* | |
19 | * One shortcoming of this driver is that it does not comply with | |
20 | * section 8 of RFC2364 - we are supposed to detect a change | |
21 | * in encapsulation and immediately abort the connection (in order | |
22 | * to avoid a black-hole being created if our peer loses state | |
23 | * and changes encapsulation unilaterally. However, since the | |
24 | * ppp_generic layer actually does the decapsulation, we need | |
25 | * a way of notifying it when we _think_ there might be a problem) | |
26 | * There's two cases: | |
27 | * 1. LLC-encapsulation was missing when it was enabled. In | |
28 | * this case, we should tell the upper layer "tear down | |
29 | * this session if this skb looks ok to you" | |
30 | * 2. LLC-encapsulation was present when it was disabled. Then | |
31 | * we need to tell the upper layer "this packet may be | |
32 | * ok, but if its in error tear down the session" | |
33 | * These hooks are not yet available in ppp_generic | |
34 | */ | |
35 | ||
99824461 JP |
36 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
37 | ||
1da177e4 | 38 | #include <linux/module.h> |
1da177e4 | 39 | #include <linux/init.h> |
a6b7a407 | 40 | #include <linux/interrupt.h> |
1da177e4 | 41 | #include <linux/skbuff.h> |
5a0e3ad6 | 42 | #include <linux/slab.h> |
1da177e4 LT |
43 | #include <linux/atm.h> |
44 | #include <linux/atmdev.h> | |
4fc268d2 | 45 | #include <linux/capability.h> |
1da177e4 | 46 | #include <linux/ppp_defs.h> |
4b32da2b | 47 | #include <linux/ppp-ioctl.h> |
1da177e4 LT |
48 | #include <linux/ppp_channel.h> |
49 | #include <linux/atmppp.h> | |
50 | ||
51 | #include "common.h" | |
52 | ||
1da177e4 LT |
53 | enum pppoatm_encaps { |
54 | e_autodetect = PPPOATM_ENCAPS_AUTODETECT, | |
55 | e_vc = PPPOATM_ENCAPS_VC, | |
56 | e_llc = PPPOATM_ENCAPS_LLC, | |
57 | }; | |
58 | ||
59 | struct pppoatm_vcc { | |
60 | struct atm_vcc *atmvcc; /* VCC descriptor */ | |
61 | void (*old_push)(struct atm_vcc *, struct sk_buff *); | |
62 | void (*old_pop)(struct atm_vcc *, struct sk_buff *); | |
e41faed9 | 63 | struct module *old_owner; |
1da177e4 LT |
64 | /* keep old push/pop for detaching */ |
65 | enum pppoatm_encaps encaps; | |
9d02daf7 DW |
66 | atomic_t inflight; |
67 | unsigned long blocked; | |
1da177e4 LT |
68 | int flags; /* SC_COMP_PROT - compress protocol */ |
69 | struct ppp_channel chan; /* interface to generic ppp layer */ | |
70 | struct tasklet_struct wakeup_tasklet; | |
71 | }; | |
72 | ||
9d02daf7 DW |
73 | /* |
74 | * We want to allow two packets in the queue. The one that's currently in | |
75 | * flight, and *one* queued up ready for the ATM device to send immediately | |
76 | * from its TX done IRQ. We want to be able to use atomic_inc_not_zero(), so | |
77 | * inflight == -2 represents an empty queue, -1 one packet, and zero means | |
78 | * there are two packets in the queue. | |
79 | */ | |
80 | #define NONE_INFLIGHT -2 | |
81 | ||
82 | #define BLOCKED 0 | |
83 | ||
1da177e4 LT |
84 | /* |
85 | * Header used for LLC Encapsulated PPP (4 bytes) followed by the LCP protocol | |
86 | * ID (0xC021) used in autodetection | |
87 | */ | |
88 | static const unsigned char pppllc[6] = { 0xFE, 0xFE, 0x03, 0xCF, 0xC0, 0x21 }; | |
89 | #define LLC_LEN (4) | |
90 | ||
91 | static inline struct pppoatm_vcc *atmvcc_to_pvcc(const struct atm_vcc *atmvcc) | |
92 | { | |
93 | return (struct pppoatm_vcc *) (atmvcc->user_back); | |
94 | } | |
95 | ||
96 | static inline struct pppoatm_vcc *chan_to_pvcc(const struct ppp_channel *chan) | |
97 | { | |
98 | return (struct pppoatm_vcc *) (chan->private); | |
99 | } | |
100 | ||
101 | /* | |
102 | * We can't do this directly from our _pop handler, since the ppp code | |
103 | * doesn't want to be called in interrupt context, so we do it from | |
104 | * a tasklet | |
105 | */ | |
106 | static void pppoatm_wakeup_sender(unsigned long arg) | |
107 | { | |
108 | ppp_output_wakeup((struct ppp_channel *) arg); | |
109 | } | |
110 | ||
111 | /* | |
112 | * This gets called every time the ATM card has finished sending our | |
113 | * skb. The ->old_pop will take care up normal atm flow control, | |
114 | * but we also need to wake up the device if we blocked it | |
115 | */ | |
116 | static void pppoatm_pop(struct atm_vcc *atmvcc, struct sk_buff *skb) | |
117 | { | |
118 | struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc); | |
9d02daf7 | 119 | |
1da177e4 | 120 | pvcc->old_pop(atmvcc, skb); |
9d02daf7 DW |
121 | atomic_dec(&pvcc->inflight); |
122 | ||
1da177e4 | 123 | /* |
9d02daf7 DW |
124 | * We always used to run the wakeup tasklet unconditionally here, for |
125 | * fear of race conditions where we clear the BLOCKED flag just as we | |
126 | * refuse another packet in pppoatm_send(). This was quite inefficient. | |
127 | * | |
128 | * In fact it's OK. The PPP core will only ever call pppoatm_send() | |
129 | * while holding the channel->downl lock. And ppp_output_wakeup() as | |
130 | * called by the tasklet will *also* grab that lock. So even if another | |
131 | * CPU is in pppoatm_send() right now, the tasklet isn't going to race | |
132 | * with it. The wakeup *will* happen after the other CPU is safely out | |
133 | * of pppoatm_send() again. | |
134 | * | |
135 | * So if the CPU in pppoatm_send() has already set the BLOCKED bit and | |
136 | * it about to return, that's fine. We trigger a wakeup which will | |
137 | * happen later. And if the CPU in pppoatm_send() *hasn't* set the | |
138 | * BLOCKED bit yet, that's fine too because of the double check in | |
139 | * pppoatm_may_send() which is commented there. | |
1da177e4 | 140 | */ |
9d02daf7 DW |
141 | if (test_and_clear_bit(BLOCKED, &pvcc->blocked)) |
142 | tasklet_schedule(&pvcc->wakeup_tasklet); | |
1da177e4 LT |
143 | } |
144 | ||
145 | /* | |
146 | * Unbind from PPP - currently we only do this when closing the socket, | |
147 | * but we could put this into an ioctl if need be | |
148 | */ | |
149 | static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc) | |
150 | { | |
151 | struct pppoatm_vcc *pvcc; | |
152 | pvcc = atmvcc_to_pvcc(atmvcc); | |
153 | atmvcc->push = pvcc->old_push; | |
154 | atmvcc->pop = pvcc->old_pop; | |
155 | tasklet_kill(&pvcc->wakeup_tasklet); | |
156 | ppp_unregister_channel(&pvcc->chan); | |
157 | atmvcc->user_back = NULL; | |
158 | kfree(pvcc); | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* Called when an AAL5 PDU comes in */ | |
162 | static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb) | |
163 | { | |
164 | struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc); | |
99824461 | 165 | pr_debug("\n"); |
1da177e4 | 166 | if (skb == NULL) { /* VCC was closed */ |
e41faed9 KM |
167 | struct module *module; |
168 | ||
52240062 | 169 | pr_debug("removing ATMPPP VCC %p\n", pvcc); |
e41faed9 | 170 | module = pvcc->old_owner; |
1da177e4 LT |
171 | pppoatm_unassign_vcc(atmvcc); |
172 | atmvcc->push(atmvcc, NULL); /* Pass along bad news */ | |
e41faed9 | 173 | module_put(module); |
1da177e4 LT |
174 | return; |
175 | } | |
176 | atm_return(atmvcc, skb->truesize); | |
177 | switch (pvcc->encaps) { | |
178 | case e_llc: | |
179 | if (skb->len < LLC_LEN || | |
180 | memcmp(skb->data, pppllc, LLC_LEN)) | |
181 | goto error; | |
182 | skb_pull(skb, LLC_LEN); | |
183 | break; | |
184 | case e_autodetect: | |
185 | if (pvcc->chan.ppp == NULL) { /* Not bound yet! */ | |
186 | kfree_skb(skb); | |
187 | return; | |
188 | } | |
189 | if (skb->len >= sizeof(pppllc) && | |
190 | !memcmp(skb->data, pppllc, sizeof(pppllc))) { | |
191 | pvcc->encaps = e_llc; | |
192 | skb_pull(skb, LLC_LEN); | |
193 | break; | |
194 | } | |
195 | if (skb->len >= (sizeof(pppllc) - LLC_LEN) && | |
196 | !memcmp(skb->data, &pppllc[LLC_LEN], | |
197 | sizeof(pppllc) - LLC_LEN)) { | |
198 | pvcc->encaps = e_vc; | |
199 | pvcc->chan.mtu += LLC_LEN; | |
200 | break; | |
201 | } | |
99824461 JP |
202 | pr_debug("Couldn't autodetect yet (skb: %02X %02X %02X %02X %02X %02X)\n", |
203 | skb->data[0], skb->data[1], skb->data[2], | |
204 | skb->data[3], skb->data[4], skb->data[5]); | |
1da177e4 LT |
205 | goto error; |
206 | case e_vc: | |
207 | break; | |
208 | } | |
209 | ppp_input(&pvcc->chan, skb); | |
210 | return; | |
d81219db JP |
211 | |
212 | error: | |
1da177e4 LT |
213 | kfree_skb(skb); |
214 | ppp_input_error(&pvcc->chan, 0); | |
215 | } | |
216 | ||
9d02daf7 DW |
217 | static inline int pppoatm_may_send(struct pppoatm_vcc *pvcc, int size) |
218 | { | |
219 | /* | |
220 | * It's not clear that we need to bother with using atm_may_send() | |
221 | * to check we don't exceed sk->sk_sndbuf. If userspace sets a | |
222 | * value of sk_sndbuf which is lower than the MTU, we're going to | |
223 | * block for ever. But the code always did that before we introduced | |
224 | * the packet count limit, so... | |
225 | */ | |
226 | if (atm_may_send(pvcc->atmvcc, size) && | |
227 | atomic_inc_not_zero_hint(&pvcc->inflight, NONE_INFLIGHT)) | |
228 | return 1; | |
229 | ||
230 | /* | |
231 | * We use test_and_set_bit() rather than set_bit() here because | |
232 | * we need to ensure there's a memory barrier after it. The bit | |
233 | * *must* be set before we do the atomic_inc() on pvcc->inflight. | |
234 | * There's no smp_mb__after_set_bit(), so it's this or abuse | |
235 | * smp_mb__after_clear_bit(). | |
236 | */ | |
237 | test_and_set_bit(BLOCKED, &pvcc->blocked); | |
238 | ||
239 | /* | |
240 | * We may have raced with pppoatm_pop(). If it ran for the | |
241 | * last packet in the queue, *just* before we set the BLOCKED | |
242 | * bit, then it might never run again and the channel could | |
243 | * remain permanently blocked. Cope with that race by checking | |
244 | * *again*. If it did run in that window, we'll have space on | |
245 | * the queue now and can return success. It's harmless to leave | |
246 | * the BLOCKED flag set, since it's only used as a trigger to | |
247 | * run the wakeup tasklet. Another wakeup will never hurt. | |
248 | * If pppoatm_pop() is running but hasn't got as far as making | |
249 | * space on the queue yet, then it hasn't checked the BLOCKED | |
250 | * flag yet either, so we're safe in that case too. It'll issue | |
251 | * an "immediate" wakeup... where "immediate" actually involves | |
252 | * taking the PPP channel's ->downl lock, which is held by the | |
253 | * code path that calls pppoatm_send(), and is thus going to | |
254 | * wait for us to finish. | |
255 | */ | |
256 | if (atm_may_send(pvcc->atmvcc, size) && | |
257 | atomic_inc_not_zero(&pvcc->inflight)) | |
258 | return 1; | |
259 | ||
260 | return 0; | |
261 | } | |
1da177e4 LT |
262 | /* |
263 | * Called by the ppp_generic.c to send a packet - returns true if packet | |
264 | * was accepted. If we return false, then it's our job to call | |
265 | * ppp_output_wakeup(chan) when we're feeling more up to it. | |
266 | * Note that in the ENOMEM case (as opposed to the !atm_may_send case) | |
267 | * we should really drop the packet, but the generic layer doesn't | |
268 | * support this yet. We just return 'DROP_PACKET' which we actually define | |
269 | * as success, just to be clear what we're really doing. | |
270 | */ | |
271 | #define DROP_PACKET 1 | |
272 | static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb) | |
273 | { | |
274 | struct pppoatm_vcc *pvcc = chan_to_pvcc(chan); | |
3ac10800 KM |
275 | struct atm_vcc *vcc; |
276 | int ret; | |
277 | ||
1da177e4 | 278 | ATM_SKB(skb)->vcc = pvcc->atmvcc; |
99824461 | 279 | pr_debug("(skb=0x%p, vcc=0x%p)\n", skb, pvcc->atmvcc); |
1da177e4 LT |
280 | if (skb->data[0] == '\0' && (pvcc->flags & SC_COMP_PROT)) |
281 | (void) skb_pull(skb, 1); | |
3ac10800 KM |
282 | |
283 | vcc = ATM_SKB(skb)->vcc; | |
284 | bh_lock_sock(sk_atm(vcc)); | |
285 | if (sock_owned_by_user(sk_atm(vcc))) | |
286 | goto nospace; | |
287 | ||
1da177e4 LT |
288 | switch (pvcc->encaps) { /* LLC encapsulation needed */ |
289 | case e_llc: | |
290 | if (skb_headroom(skb) < LLC_LEN) { | |
291 | struct sk_buff *n; | |
292 | n = skb_realloc_headroom(skb, LLC_LEN); | |
293 | if (n != NULL && | |
9d02daf7 | 294 | !pppoatm_may_send(pvcc, n->truesize)) { |
1da177e4 LT |
295 | kfree_skb(n); |
296 | goto nospace; | |
297 | } | |
5d0ba55b | 298 | consume_skb(skb); |
d81219db | 299 | skb = n; |
3ac10800 KM |
300 | if (skb == NULL) { |
301 | bh_unlock_sock(sk_atm(vcc)); | |
1da177e4 | 302 | return DROP_PACKET; |
3ac10800 | 303 | } |
9d02daf7 | 304 | } else if (!pppoatm_may_send(pvcc, skb->truesize)) |
1da177e4 LT |
305 | goto nospace; |
306 | memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN); | |
307 | break; | |
308 | case e_vc: | |
9d02daf7 | 309 | if (!pppoatm_may_send(pvcc, skb->truesize)) |
1da177e4 LT |
310 | goto nospace; |
311 | break; | |
312 | case e_autodetect: | |
3ac10800 | 313 | bh_unlock_sock(sk_atm(vcc)); |
52240062 | 314 | pr_debug("Trying to send without setting encaps!\n"); |
1da177e4 LT |
315 | kfree_skb(skb); |
316 | return 1; | |
317 | } | |
318 | ||
319 | atomic_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc); | |
320 | ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options; | |
99824461 JP |
321 | pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", |
322 | skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev); | |
3ac10800 | 323 | ret = ATM_SKB(skb)->vcc->send(ATM_SKB(skb)->vcc, skb) |
1da177e4 | 324 | ? DROP_PACKET : 1; |
3ac10800 KM |
325 | bh_unlock_sock(sk_atm(vcc)); |
326 | return ret; | |
d81219db | 327 | nospace: |
3ac10800 | 328 | bh_unlock_sock(sk_atm(vcc)); |
1da177e4 LT |
329 | /* |
330 | * We don't have space to send this SKB now, but we might have | |
331 | * already applied SC_COMP_PROT compression, so may need to undo | |
332 | */ | |
333 | if ((pvcc->flags & SC_COMP_PROT) && skb_headroom(skb) > 0 && | |
334 | skb->data[-1] == '\0') | |
335 | (void) skb_push(skb, 1); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | /* This handles ioctls sent to the /dev/ppp interface */ | |
340 | static int pppoatm_devppp_ioctl(struct ppp_channel *chan, unsigned int cmd, | |
341 | unsigned long arg) | |
342 | { | |
343 | switch (cmd) { | |
344 | case PPPIOCGFLAGS: | |
345 | return put_user(chan_to_pvcc(chan)->flags, (int __user *) arg) | |
346 | ? -EFAULT : 0; | |
347 | case PPPIOCSFLAGS: | |
348 | return get_user(chan_to_pvcc(chan)->flags, (int __user *) arg) | |
349 | ? -EFAULT : 0; | |
350 | } | |
351 | return -ENOTTY; | |
352 | } | |
353 | ||
d7100da0 | 354 | static const struct ppp_channel_ops pppoatm_ops = { |
1da177e4 LT |
355 | .start_xmit = pppoatm_send, |
356 | .ioctl = pppoatm_devppp_ioctl, | |
357 | }; | |
358 | ||
359 | static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg) | |
360 | { | |
361 | struct atm_backend_ppp be; | |
362 | struct pppoatm_vcc *pvcc; | |
363 | int err; | |
364 | /* | |
365 | * Each PPPoATM instance has its own tasklet - this is just a | |
366 | * prototypical one used to initialize them | |
367 | */ | |
368 | static const DECLARE_TASKLET(tasklet_proto, pppoatm_wakeup_sender, 0); | |
369 | if (copy_from_user(&be, arg, sizeof be)) | |
370 | return -EFAULT; | |
371 | if (be.encaps != PPPOATM_ENCAPS_AUTODETECT && | |
372 | be.encaps != PPPOATM_ENCAPS_VC && be.encaps != PPPOATM_ENCAPS_LLC) | |
373 | return -EINVAL; | |
0da974f4 | 374 | pvcc = kzalloc(sizeof(*pvcc), GFP_KERNEL); |
1da177e4 LT |
375 | if (pvcc == NULL) |
376 | return -ENOMEM; | |
1da177e4 | 377 | pvcc->atmvcc = atmvcc; |
9d02daf7 DW |
378 | |
379 | /* Maximum is zero, so that we can use atomic_inc_not_zero() */ | |
380 | atomic_set(&pvcc->inflight, NONE_INFLIGHT); | |
1da177e4 LT |
381 | pvcc->old_push = atmvcc->push; |
382 | pvcc->old_pop = atmvcc->pop; | |
e41faed9 | 383 | pvcc->old_owner = atmvcc->owner; |
1da177e4 LT |
384 | pvcc->encaps = (enum pppoatm_encaps) be.encaps; |
385 | pvcc->chan.private = pvcc; | |
386 | pvcc->chan.ops = &pppoatm_ops; | |
387 | pvcc->chan.mtu = atmvcc->qos.txtp.max_sdu - PPP_HDRLEN - | |
388 | (be.encaps == e_vc ? 0 : LLC_LEN); | |
389 | pvcc->wakeup_tasklet = tasklet_proto; | |
390 | pvcc->wakeup_tasklet.data = (unsigned long) &pvcc->chan; | |
d81219db JP |
391 | err = ppp_register_channel(&pvcc->chan); |
392 | if (err != 0) { | |
1da177e4 LT |
393 | kfree(pvcc); |
394 | return err; | |
395 | } | |
396 | atmvcc->user_back = pvcc; | |
397 | atmvcc->push = pppoatm_push; | |
398 | atmvcc->pop = pppoatm_pop; | |
399 | __module_get(THIS_MODULE); | |
e41faed9 | 400 | atmvcc->owner = THIS_MODULE; |
4e55f578 JBD |
401 | |
402 | /* re-process everything received between connection setup and | |
403 | backend setup */ | |
404 | vcc_process_recv_queue(atmvcc); | |
1da177e4 LT |
405 | return 0; |
406 | } | |
407 | ||
408 | /* | |
409 | * This handles ioctls actually performed on our vcc - we must return | |
410 | * -ENOIOCTLCMD for any unrecognized ioctl | |
411 | */ | |
412 | static int pppoatm_ioctl(struct socket *sock, unsigned int cmd, | |
413 | unsigned long arg) | |
414 | { | |
415 | struct atm_vcc *atmvcc = ATM_SD(sock); | |
416 | void __user *argp = (void __user *)arg; | |
417 | ||
418 | if (cmd != ATM_SETBACKEND && atmvcc->push != pppoatm_push) | |
419 | return -ENOIOCTLCMD; | |
420 | switch (cmd) { | |
421 | case ATM_SETBACKEND: { | |
422 | atm_backend_t b; | |
423 | if (get_user(b, (atm_backend_t __user *) argp)) | |
424 | return -EFAULT; | |
425 | if (b != ATM_BACKEND_PPP) | |
426 | return -ENOIOCTLCMD; | |
427 | if (!capable(CAP_NET_ADMIN)) | |
428 | return -EPERM; | |
3b1a9145 KM |
429 | if (sock->state != SS_CONNECTED) |
430 | return -EINVAL; | |
1da177e4 LT |
431 | return pppoatm_assign_vcc(atmvcc, argp); |
432 | } | |
433 | case PPPIOCGCHAN: | |
434 | return put_user(ppp_channel_index(&atmvcc_to_pvcc(atmvcc)-> | |
435 | chan), (int __user *) argp) ? -EFAULT : 0; | |
436 | case PPPIOCGUNIT: | |
437 | return put_user(ppp_unit_number(&atmvcc_to_pvcc(atmvcc)-> | |
438 | chan), (int __user *) argp) ? -EFAULT : 0; | |
439 | } | |
440 | return -ENOIOCTLCMD; | |
441 | } | |
442 | ||
443 | static struct atm_ioctl pppoatm_ioctl_ops = { | |
444 | .owner = THIS_MODULE, | |
445 | .ioctl = pppoatm_ioctl, | |
446 | }; | |
447 | ||
448 | static int __init pppoatm_init(void) | |
449 | { | |
450 | register_atm_ioctl(&pppoatm_ioctl_ops); | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static void __exit pppoatm_exit(void) | |
455 | { | |
456 | deregister_atm_ioctl(&pppoatm_ioctl_ops); | |
457 | } | |
458 | ||
459 | module_init(pppoatm_init); | |
460 | module_exit(pppoatm_exit); | |
461 | ||
462 | MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>"); | |
463 | MODULE_DESCRIPTION("RFC2364 PPP over ATM/AAL5"); | |
464 | MODULE_LICENSE("GPL"); |