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1da177e4 LT |
1 | /* |
2 | * IrNET protocol module : Synchronous PPP over an IrDA socket. | |
3 | * | |
4 | * Jean II - HPL `00 - <jt@hpl.hp.com> | |
5 | * | |
6 | * This file implement the PPP interface and /dev/irnet character device. | |
7 | * The PPP interface hook to the ppp_generic module, handle all our | |
8 | * relationship to the PPP code in the kernel (and by extension to pppd), | |
9 | * and exchange PPP frames with this module (send/receive). | |
10 | * The /dev/irnet device is used primarily for 2 functions : | |
11 | * 1) as a stub for pppd (the ppp daemon), so that we can appropriately | |
12 | * generate PPP sessions (we pretend we are a tty). | |
13 | * 2) as a control channel (write commands, read events) | |
14 | */ | |
15 | ||
405f5571 | 16 | #include <linux/smp_lock.h> |
1da177e4 LT |
17 | #include "irnet_ppp.h" /* Private header */ |
18 | /* Please put other headers in irnet.h - Thanks */ | |
19 | ||
20 | /* Generic PPP callbacks (to call us) */ | |
21 | static struct ppp_channel_ops irnet_ppp_ops = { | |
22 | .start_xmit = ppp_irnet_send, | |
23 | .ioctl = ppp_irnet_ioctl | |
24 | }; | |
25 | ||
26 | /************************* CONTROL CHANNEL *************************/ | |
27 | /* | |
28 | * When a pppd instance is not active on /dev/irnet, it acts as a control | |
29 | * channel. | |
30 | * Writing allow to set up the IrDA destination of the IrNET channel, | |
31 | * and any application may be read events happening in IrNET... | |
32 | */ | |
33 | ||
34 | /*------------------------------------------------------------------*/ | |
35 | /* | |
36 | * Write is used to send a command to configure a IrNET channel | |
37 | * before it is open by pppd. The syntax is : "command argument" | |
38 | * Currently there is only two defined commands : | |
39 | * o name : set the requested IrDA nickname of the IrNET peer. | |
40 | * o addr : set the requested IrDA address of the IrNET peer. | |
41 | * Note : the code is crude, but effective... | |
42 | */ | |
43 | static inline ssize_t | |
44 | irnet_ctrl_write(irnet_socket * ap, | |
45 | const char __user *buf, | |
46 | size_t count) | |
47 | { | |
48 | char command[IRNET_MAX_COMMAND]; | |
49 | char * start; /* Current command being processed */ | |
50 | char * next; /* Next command to process */ | |
51 | int length; /* Length of current command */ | |
52 | ||
53 | DENTER(CTRL_TRACE, "(ap=0x%p, count=%Zd)\n", ap, count); | |
54 | ||
55 | /* Check for overflow... */ | |
56 | DABORT(count >= IRNET_MAX_COMMAND, -ENOMEM, | |
57 | CTRL_ERROR, "Too much data !!!\n"); | |
58 | ||
59 | /* Get the data in the driver */ | |
60 | if(copy_from_user(command, buf, count)) | |
61 | { | |
62 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
63 | return -EFAULT; | |
64 | } | |
65 | ||
66 | /* Safe terminate the string */ | |
67 | command[count] = '\0'; | |
68 | DEBUG(CTRL_INFO, "Command line received is ``%s'' (%Zd).\n", | |
69 | command, count); | |
70 | ||
71 | /* Check every commands in the command line */ | |
72 | next = command; | |
73 | while(next != NULL) | |
74 | { | |
75 | /* Look at the next command */ | |
76 | start = next; | |
77 | ||
78 | /* Scrap whitespaces before the command */ | |
79 | while(isspace(*start)) | |
80 | start++; | |
81 | ||
82 | /* ',' is our command separator */ | |
83 | next = strchr(start, ','); | |
84 | if(next) | |
85 | { | |
86 | *next = '\0'; /* Terminate command */ | |
87 | length = next - start; /* Length */ | |
88 | next++; /* Skip the '\0' */ | |
89 | } | |
90 | else | |
91 | length = strlen(start); | |
92 | ||
93 | DEBUG(CTRL_INFO, "Found command ``%s'' (%d).\n", start, length); | |
94 | ||
95 | /* Check if we recognised one of the known command | |
96 | * We can't use "switch" with strings, so hack with "continue" */ | |
6819bc2e | 97 | |
1da177e4 LT |
98 | /* First command : name -> Requested IrDA nickname */ |
99 | if(!strncmp(start, "name", 4)) | |
100 | { | |
101 | /* Copy the name only if is included and not "any" */ | |
102 | if((length > 5) && (strcmp(start + 5, "any"))) | |
103 | { | |
104 | /* Strip out trailing whitespaces */ | |
105 | while(isspace(start[length - 1])) | |
106 | length--; | |
107 | ||
108 | /* Copy the name for later reuse */ | |
109 | memcpy(ap->rname, start + 5, length - 5); | |
110 | ap->rname[length - 5] = '\0'; | |
111 | } | |
112 | else | |
113 | ap->rname[0] = '\0'; | |
114 | DEBUG(CTRL_INFO, "Got rname = ``%s''\n", ap->rname); | |
115 | ||
116 | /* Restart the loop */ | |
117 | continue; | |
118 | } | |
119 | ||
120 | /* Second command : addr, daddr -> Requested IrDA destination address | |
121 | * Also process : saddr -> Requested IrDA source address */ | |
122 | if((!strncmp(start, "addr", 4)) || | |
123 | (!strncmp(start, "daddr", 5)) || | |
124 | (!strncmp(start, "saddr", 5))) | |
125 | { | |
126 | __u32 addr = DEV_ADDR_ANY; | |
127 | ||
128 | /* Copy the address only if is included and not "any" */ | |
129 | if((length > 5) && (strcmp(start + 5, "any"))) | |
130 | { | |
131 | char * begp = start + 5; | |
132 | char * endp; | |
133 | ||
134 | /* Scrap whitespaces before the command */ | |
135 | while(isspace(*begp)) | |
136 | begp++; | |
137 | ||
138 | /* Convert argument to a number (last arg is the base) */ | |
139 | addr = simple_strtoul(begp, &endp, 16); | |
140 | /* Has it worked ? (endp should be start + length) */ | |
141 | DABORT(endp <= (start + 5), -EINVAL, | |
142 | CTRL_ERROR, "Invalid address.\n"); | |
143 | } | |
144 | /* Which type of address ? */ | |
145 | if(start[0] == 's') | |
146 | { | |
147 | /* Save it */ | |
148 | ap->rsaddr = addr; | |
149 | DEBUG(CTRL_INFO, "Got rsaddr = %08x\n", ap->rsaddr); | |
150 | } | |
151 | else | |
152 | { | |
153 | /* Save it */ | |
154 | ap->rdaddr = addr; | |
155 | DEBUG(CTRL_INFO, "Got rdaddr = %08x\n", ap->rdaddr); | |
156 | } | |
157 | ||
158 | /* Restart the loop */ | |
159 | continue; | |
160 | } | |
161 | ||
162 | /* Other possible command : connect N (number of retries) */ | |
163 | ||
164 | /* No command matched -> Failed... */ | |
165 | DABORT(1, -EINVAL, CTRL_ERROR, "Not a recognised IrNET command.\n"); | |
166 | } | |
167 | ||
168 | /* Success : we have parsed all commands successfully */ | |
169 | return(count); | |
170 | } | |
171 | ||
172 | #ifdef INITIAL_DISCOVERY | |
173 | /*------------------------------------------------------------------*/ | |
174 | /* | |
175 | * Function irnet_get_discovery_log (self) | |
176 | * | |
177 | * Query the content on the discovery log if not done | |
178 | * | |
179 | * This function query the current content of the discovery log | |
180 | * at the startup of the event channel and save it in the internal struct. | |
181 | */ | |
182 | static void | |
183 | irnet_get_discovery_log(irnet_socket * ap) | |
184 | { | |
185 | __u16 mask = irlmp_service_to_hint(S_LAN); | |
186 | ||
187 | /* Ask IrLMP for the current discovery log */ | |
188 | ap->discoveries = irlmp_get_discoveries(&ap->disco_number, mask, | |
189 | DISCOVERY_DEFAULT_SLOTS); | |
190 | ||
191 | /* Check if the we got some results */ | |
192 | if(ap->discoveries == NULL) | |
193 | ap->disco_number = -1; | |
194 | ||
195 | DEBUG(CTRL_INFO, "Got the log (0x%p), size is %d\n", | |
196 | ap->discoveries, ap->disco_number); | |
197 | } | |
198 | ||
199 | /*------------------------------------------------------------------*/ | |
200 | /* | |
201 | * Function irnet_read_discovery_log (self, event) | |
202 | * | |
203 | * Read the content on the discovery log | |
204 | * | |
205 | * This function dump the current content of the discovery log | |
206 | * at the startup of the event channel. | |
207 | * Return 1 if wrote an event on the control channel... | |
208 | * | |
209 | * State of the ap->disco_XXX variables : | |
210 | * Socket creation : discoveries = NULL ; disco_index = 0 ; disco_number = 0 | |
211 | * While reading : discoveries = ptr ; disco_index = X ; disco_number = Y | |
212 | * After reading : discoveries = NULL ; disco_index = Y ; disco_number = -1 | |
213 | */ | |
214 | static inline int | |
215 | irnet_read_discovery_log(irnet_socket * ap, | |
216 | char * event) | |
217 | { | |
218 | int done_event = 0; | |
219 | ||
220 | DENTER(CTRL_TRACE, "(ap=0x%p, event=0x%p)\n", | |
221 | ap, event); | |
222 | ||
223 | /* Test if we have some work to do or we have already finished */ | |
224 | if(ap->disco_number == -1) | |
225 | { | |
226 | DEBUG(CTRL_INFO, "Already done\n"); | |
227 | return 0; | |
228 | } | |
229 | ||
230 | /* Test if it's the first time and therefore we need to get the log */ | |
231 | if(ap->discoveries == NULL) | |
232 | irnet_get_discovery_log(ap); | |
233 | ||
234 | /* Check if we have more item to dump */ | |
235 | if(ap->disco_index < ap->disco_number) | |
236 | { | |
237 | /* Write an event */ | |
238 | sprintf(event, "Found %08x (%s) behind %08x {hints %02X-%02X}\n", | |
239 | ap->discoveries[ap->disco_index].daddr, | |
240 | ap->discoveries[ap->disco_index].info, | |
241 | ap->discoveries[ap->disco_index].saddr, | |
242 | ap->discoveries[ap->disco_index].hints[0], | |
243 | ap->discoveries[ap->disco_index].hints[1]); | |
244 | DEBUG(CTRL_INFO, "Writing discovery %d : %s\n", | |
245 | ap->disco_index, ap->discoveries[ap->disco_index].info); | |
246 | ||
247 | /* We have an event */ | |
248 | done_event = 1; | |
249 | /* Next discovery */ | |
250 | ap->disco_index++; | |
251 | } | |
252 | ||
253 | /* Check if we have done the last item */ | |
254 | if(ap->disco_index >= ap->disco_number) | |
255 | { | |
256 | /* No more items : remove the log and signal termination */ | |
257 | DEBUG(CTRL_INFO, "Cleaning up log (0x%p)\n", | |
258 | ap->discoveries); | |
259 | if(ap->discoveries != NULL) | |
260 | { | |
261 | /* Cleanup our copy of the discovery log */ | |
262 | kfree(ap->discoveries); | |
263 | ap->discoveries = NULL; | |
264 | } | |
265 | ap->disco_number = -1; | |
266 | } | |
267 | ||
268 | return done_event; | |
269 | } | |
270 | #endif /* INITIAL_DISCOVERY */ | |
271 | ||
272 | /*------------------------------------------------------------------*/ | |
273 | /* | |
274 | * Read is used to get IrNET events | |
275 | */ | |
276 | static inline ssize_t | |
277 | irnet_ctrl_read(irnet_socket * ap, | |
278 | struct file * file, | |
279 | char __user * buf, | |
280 | size_t count) | |
281 | { | |
282 | DECLARE_WAITQUEUE(wait, current); | |
283 | char event[64]; /* Max event is 61 char */ | |
284 | ssize_t ret = 0; | |
285 | ||
286 | DENTER(CTRL_TRACE, "(ap=0x%p, count=%Zd)\n", ap, count); | |
287 | ||
288 | /* Check if we can write an event out in one go */ | |
289 | DABORT(count < sizeof(event), -EOVERFLOW, CTRL_ERROR, "Buffer to small.\n"); | |
290 | ||
291 | #ifdef INITIAL_DISCOVERY | |
292 | /* Check if we have read the log */ | |
293 | if(irnet_read_discovery_log(ap, event)) | |
294 | { | |
295 | /* We have an event !!! Copy it to the user */ | |
296 | if(copy_to_user(buf, event, strlen(event))) | |
297 | { | |
298 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
299 | return -EFAULT; | |
300 | } | |
301 | ||
302 | DEXIT(CTRL_TRACE, "\n"); | |
303 | return(strlen(event)); | |
304 | } | |
305 | #endif /* INITIAL_DISCOVERY */ | |
306 | ||
307 | /* Put ourselves on the wait queue to be woken up */ | |
308 | add_wait_queue(&irnet_events.rwait, &wait); | |
309 | current->state = TASK_INTERRUPTIBLE; | |
310 | for(;;) | |
311 | { | |
312 | /* If there is unread events */ | |
313 | ret = 0; | |
314 | if(ap->event_index != irnet_events.index) | |
315 | break; | |
316 | ret = -EAGAIN; | |
317 | if(file->f_flags & O_NONBLOCK) | |
318 | break; | |
319 | ret = -ERESTARTSYS; | |
320 | if(signal_pending(current)) | |
321 | break; | |
322 | /* Yield and wait to be woken up */ | |
323 | schedule(); | |
324 | } | |
325 | current->state = TASK_RUNNING; | |
326 | remove_wait_queue(&irnet_events.rwait, &wait); | |
327 | ||
328 | /* Did we got it ? */ | |
329 | if(ret != 0) | |
330 | { | |
331 | /* No, return the error code */ | |
332 | DEXIT(CTRL_TRACE, " - ret %Zd\n", ret); | |
333 | return ret; | |
334 | } | |
335 | ||
336 | /* Which event is it ? */ | |
337 | switch(irnet_events.log[ap->event_index].event) | |
338 | { | |
339 | case IRNET_DISCOVER: | |
340 | sprintf(event, "Discovered %08x (%s) behind %08x {hints %02X-%02X}\n", | |
341 | irnet_events.log[ap->event_index].daddr, | |
342 | irnet_events.log[ap->event_index].name, | |
343 | irnet_events.log[ap->event_index].saddr, | |
344 | irnet_events.log[ap->event_index].hints.byte[0], | |
345 | irnet_events.log[ap->event_index].hints.byte[1]); | |
346 | break; | |
347 | case IRNET_EXPIRE: | |
348 | sprintf(event, "Expired %08x (%s) behind %08x {hints %02X-%02X}\n", | |
349 | irnet_events.log[ap->event_index].daddr, | |
350 | irnet_events.log[ap->event_index].name, | |
351 | irnet_events.log[ap->event_index].saddr, | |
352 | irnet_events.log[ap->event_index].hints.byte[0], | |
353 | irnet_events.log[ap->event_index].hints.byte[1]); | |
354 | break; | |
355 | case IRNET_CONNECT_TO: | |
356 | sprintf(event, "Connected to %08x (%s) on ppp%d\n", | |
357 | irnet_events.log[ap->event_index].daddr, | |
358 | irnet_events.log[ap->event_index].name, | |
359 | irnet_events.log[ap->event_index].unit); | |
360 | break; | |
361 | case IRNET_CONNECT_FROM: | |
362 | sprintf(event, "Connection from %08x (%s) on ppp%d\n", | |
363 | irnet_events.log[ap->event_index].daddr, | |
364 | irnet_events.log[ap->event_index].name, | |
365 | irnet_events.log[ap->event_index].unit); | |
366 | break; | |
367 | case IRNET_REQUEST_FROM: | |
368 | sprintf(event, "Request from %08x (%s) behind %08x\n", | |
369 | irnet_events.log[ap->event_index].daddr, | |
370 | irnet_events.log[ap->event_index].name, | |
371 | irnet_events.log[ap->event_index].saddr); | |
372 | break; | |
373 | case IRNET_NOANSWER_FROM: | |
374 | sprintf(event, "No-answer from %08x (%s) on ppp%d\n", | |
375 | irnet_events.log[ap->event_index].daddr, | |
376 | irnet_events.log[ap->event_index].name, | |
377 | irnet_events.log[ap->event_index].unit); | |
378 | break; | |
379 | case IRNET_BLOCKED_LINK: | |
380 | sprintf(event, "Blocked link with %08x (%s) on ppp%d\n", | |
381 | irnet_events.log[ap->event_index].daddr, | |
382 | irnet_events.log[ap->event_index].name, | |
383 | irnet_events.log[ap->event_index].unit); | |
384 | break; | |
385 | case IRNET_DISCONNECT_FROM: | |
386 | sprintf(event, "Disconnection from %08x (%s) on ppp%d\n", | |
387 | irnet_events.log[ap->event_index].daddr, | |
388 | irnet_events.log[ap->event_index].name, | |
389 | irnet_events.log[ap->event_index].unit); | |
390 | break; | |
391 | case IRNET_DISCONNECT_TO: | |
392 | sprintf(event, "Disconnected to %08x (%s)\n", | |
393 | irnet_events.log[ap->event_index].daddr, | |
394 | irnet_events.log[ap->event_index].name); | |
395 | break; | |
396 | default: | |
397 | sprintf(event, "Bug\n"); | |
398 | } | |
399 | /* Increment our event index */ | |
400 | ap->event_index = (ap->event_index + 1) % IRNET_MAX_EVENTS; | |
401 | ||
402 | DEBUG(CTRL_INFO, "Event is :%s", event); | |
403 | ||
404 | /* Copy it to the user */ | |
405 | if(copy_to_user(buf, event, strlen(event))) | |
406 | { | |
407 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
408 | return -EFAULT; | |
409 | } | |
410 | ||
411 | DEXIT(CTRL_TRACE, "\n"); | |
412 | return(strlen(event)); | |
413 | } | |
414 | ||
415 | /*------------------------------------------------------------------*/ | |
416 | /* | |
417 | * Poll : called when someone do a select on /dev/irnet. | |
418 | * Just check if there are new events... | |
419 | */ | |
420 | static inline unsigned int | |
421 | irnet_ctrl_poll(irnet_socket * ap, | |
422 | struct file * file, | |
423 | poll_table * wait) | |
424 | { | |
425 | unsigned int mask; | |
426 | ||
427 | DENTER(CTRL_TRACE, "(ap=0x%p)\n", ap); | |
428 | ||
429 | poll_wait(file, &irnet_events.rwait, wait); | |
430 | mask = POLLOUT | POLLWRNORM; | |
431 | /* If there is unread events */ | |
432 | if(ap->event_index != irnet_events.index) | |
433 | mask |= POLLIN | POLLRDNORM; | |
434 | #ifdef INITIAL_DISCOVERY | |
435 | if(ap->disco_number != -1) | |
436 | { | |
437 | /* Test if it's the first time and therefore we need to get the log */ | |
438 | if(ap->discoveries == NULL) | |
439 | irnet_get_discovery_log(ap); | |
440 | /* Recheck */ | |
441 | if(ap->disco_number != -1) | |
442 | mask |= POLLIN | POLLRDNORM; | |
443 | } | |
444 | #endif /* INITIAL_DISCOVERY */ | |
445 | ||
446 | DEXIT(CTRL_TRACE, " - mask=0x%X\n", mask); | |
447 | return mask; | |
448 | } | |
449 | ||
450 | ||
451 | /*********************** FILESYSTEM CALLBACKS ***********************/ | |
452 | /* | |
453 | * Implement the usual open, read, write functions that will be called | |
454 | * by the file system when some action is performed on /dev/irnet. | |
455 | * Most of those actions will in fact be performed by "pppd" or | |
456 | * the control channel, we just act as a redirector... | |
457 | */ | |
458 | ||
459 | /*------------------------------------------------------------------*/ | |
460 | /* | |
461 | * Open : when somebody open /dev/irnet | |
462 | * We basically create a new instance of irnet and initialise it. | |
463 | */ | |
464 | static int | |
465 | dev_irnet_open(struct inode * inode, | |
466 | struct file * file) | |
467 | { | |
468 | struct irnet_socket * ap; | |
469 | int err; | |
470 | ||
471 | DENTER(FS_TRACE, "(file=0x%p)\n", file); | |
472 | ||
473 | #ifdef SECURE_DEVIRNET | |
474 | /* This could (should?) be enforced by the permissions on /dev/irnet. */ | |
475 | if(!capable(CAP_NET_ADMIN)) | |
476 | return -EPERM; | |
477 | #endif /* SECURE_DEVIRNET */ | |
478 | ||
479 | /* Allocate a private structure for this IrNET instance */ | |
0da974f4 | 480 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
1da177e4 LT |
481 | DABORT(ap == NULL, -ENOMEM, FS_ERROR, "Can't allocate struct irnet...\n"); |
482 | ||
cddf63d9 | 483 | lock_kernel(); |
1da177e4 | 484 | /* initialize the irnet structure */ |
1da177e4 LT |
485 | ap->file = file; |
486 | ||
487 | /* PPP channel setup */ | |
488 | ap->ppp_open = 0; | |
489 | ap->chan.private = ap; | |
490 | ap->chan.ops = &irnet_ppp_ops; | |
491 | ap->chan.mtu = (2048 - TTP_MAX_HEADER - 2 - PPP_HDRLEN); | |
492 | ap->chan.hdrlen = 2 + TTP_MAX_HEADER; /* for A/C + Max IrDA hdr */ | |
493 | /* PPP parameters */ | |
494 | ap->mru = (2048 - TTP_MAX_HEADER - 2 - PPP_HDRLEN); | |
495 | ap->xaccm[0] = ~0U; | |
496 | ap->xaccm[3] = 0x60000000U; | |
497 | ap->raccm = ~0U; | |
498 | ||
499 | /* Setup the IrDA part... */ | |
500 | err = irda_irnet_create(ap); | |
501 | if(err) | |
502 | { | |
503 | DERROR(FS_ERROR, "Can't setup IrDA link...\n"); | |
504 | kfree(ap); | |
cddf63d9 | 505 | unlock_kernel(); |
1da177e4 LT |
506 | return err; |
507 | } | |
508 | ||
509 | /* For the control channel */ | |
510 | ap->event_index = irnet_events.index; /* Cancel all past events */ | |
511 | ||
512 | /* Put our stuff where we will be able to find it later */ | |
513 | file->private_data = ap; | |
514 | ||
515 | DEXIT(FS_TRACE, " - ap=0x%p\n", ap); | |
cddf63d9 | 516 | unlock_kernel(); |
1da177e4 LT |
517 | return 0; |
518 | } | |
519 | ||
520 | ||
521 | /*------------------------------------------------------------------*/ | |
522 | /* | |
523 | * Close : when somebody close /dev/irnet | |
524 | * Destroy the instance of /dev/irnet | |
525 | */ | |
526 | static int | |
527 | dev_irnet_close(struct inode * inode, | |
528 | struct file * file) | |
529 | { | |
530 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
531 | ||
532 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p)\n", | |
533 | file, ap); | |
534 | DABORT(ap == NULL, 0, FS_ERROR, "ap is NULL !!!\n"); | |
535 | ||
536 | /* Detach ourselves */ | |
537 | file->private_data = NULL; | |
538 | ||
539 | /* Close IrDA stuff */ | |
540 | irda_irnet_destroy(ap); | |
541 | ||
542 | /* Disconnect from the generic PPP layer if not already done */ | |
543 | if(ap->ppp_open) | |
544 | { | |
545 | DERROR(FS_ERROR, "Channel still registered - deregistering !\n"); | |
546 | ap->ppp_open = 0; | |
547 | ppp_unregister_channel(&ap->chan); | |
548 | } | |
549 | ||
550 | kfree(ap); | |
551 | ||
552 | DEXIT(FS_TRACE, "\n"); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /*------------------------------------------------------------------*/ | |
557 | /* | |
558 | * Write does nothing. | |
559 | * (we receive packet from ppp_generic through ppp_irnet_send()) | |
560 | */ | |
561 | static ssize_t | |
562 | dev_irnet_write(struct file * file, | |
563 | const char __user *buf, | |
564 | size_t count, | |
565 | loff_t * ppos) | |
566 | { | |
567 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
568 | ||
569 | DPASS(FS_TRACE, "(file=0x%p, ap=0x%p, count=%Zd)\n", | |
570 | file, ap, count); | |
571 | DABORT(ap == NULL, -ENXIO, FS_ERROR, "ap is NULL !!!\n"); | |
572 | ||
573 | /* If we are connected to ppp_generic, let it handle the job */ | |
574 | if(ap->ppp_open) | |
575 | return -EAGAIN; | |
576 | else | |
577 | return irnet_ctrl_write(ap, buf, count); | |
578 | } | |
579 | ||
580 | /*------------------------------------------------------------------*/ | |
581 | /* | |
582 | * Read doesn't do much either. | |
583 | * (pppd poll us, but ultimately reads through /dev/ppp) | |
584 | */ | |
585 | static ssize_t | |
586 | dev_irnet_read(struct file * file, | |
587 | char __user * buf, | |
588 | size_t count, | |
589 | loff_t * ppos) | |
590 | { | |
591 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
592 | ||
593 | DPASS(FS_TRACE, "(file=0x%p, ap=0x%p, count=%Zd)\n", | |
594 | file, ap, count); | |
595 | DABORT(ap == NULL, -ENXIO, FS_ERROR, "ap is NULL !!!\n"); | |
596 | ||
597 | /* If we are connected to ppp_generic, let it handle the job */ | |
598 | if(ap->ppp_open) | |
599 | return -EAGAIN; | |
600 | else | |
601 | return irnet_ctrl_read(ap, file, buf, count); | |
602 | } | |
603 | ||
604 | /*------------------------------------------------------------------*/ | |
605 | /* | |
606 | * Poll : called when someone do a select on /dev/irnet | |
607 | */ | |
608 | static unsigned int | |
609 | dev_irnet_poll(struct file * file, | |
610 | poll_table * wait) | |
611 | { | |
612 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
613 | unsigned int mask; | |
614 | ||
615 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p)\n", | |
616 | file, ap); | |
617 | ||
618 | mask = POLLOUT | POLLWRNORM; | |
619 | DABORT(ap == NULL, mask, FS_ERROR, "ap is NULL !!!\n"); | |
620 | ||
621 | /* If we are connected to ppp_generic, let it handle the job */ | |
622 | if(!ap->ppp_open) | |
623 | mask |= irnet_ctrl_poll(ap, file, wait); | |
624 | ||
625 | DEXIT(FS_TRACE, " - mask=0x%X\n", mask); | |
626 | return(mask); | |
627 | } | |
628 | ||
629 | /*------------------------------------------------------------------*/ | |
630 | /* | |
631 | * IOCtl : Called when someone does some ioctls on /dev/irnet | |
632 | * This is the way pppd configure us and control us while the PPP | |
633 | * instance is active. | |
634 | */ | |
54064600 AC |
635 | static long |
636 | dev_irnet_ioctl( | |
1da177e4 LT |
637 | struct file * file, |
638 | unsigned int cmd, | |
639 | unsigned long arg) | |
640 | { | |
641 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
642 | int err; | |
643 | int val; | |
644 | void __user *argp = (void __user *)arg; | |
645 | ||
646 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p, cmd=0x%X)\n", | |
647 | file, ap, cmd); | |
648 | ||
649 | /* Basic checks... */ | |
650 | DASSERT(ap != NULL, -ENXIO, PPP_ERROR, "ap is NULL...\n"); | |
651 | #ifdef SECURE_DEVIRNET | |
652 | if(!capable(CAP_NET_ADMIN)) | |
653 | return -EPERM; | |
654 | #endif /* SECURE_DEVIRNET */ | |
655 | ||
656 | err = -EFAULT; | |
657 | switch(cmd) | |
658 | { | |
659 | /* Set discipline (should be N_SYNC_PPP or N_TTY) */ | |
660 | case TIOCSETD: | |
661 | if(get_user(val, (int __user *)argp)) | |
662 | break; | |
663 | if((val == N_SYNC_PPP) || (val == N_PPP)) | |
664 | { | |
665 | DEBUG(FS_INFO, "Entering PPP discipline.\n"); | |
666 | /* PPP channel setup (ap->chan in configued in dev_irnet_open())*/ | |
54064600 | 667 | lock_kernel(); |
1da177e4 LT |
668 | err = ppp_register_channel(&ap->chan); |
669 | if(err == 0) | |
670 | { | |
671 | /* Our ppp side is active */ | |
672 | ap->ppp_open = 1; | |
673 | ||
674 | DEBUG(FS_INFO, "Trying to establish a connection.\n"); | |
675 | /* Setup the IrDA link now - may fail... */ | |
676 | irda_irnet_connect(ap); | |
677 | } | |
678 | else | |
679 | DERROR(FS_ERROR, "Can't setup PPP channel...\n"); | |
54064600 | 680 | unlock_kernel(); |
1da177e4 LT |
681 | } |
682 | else | |
683 | { | |
684 | /* In theory, should be N_TTY */ | |
685 | DEBUG(FS_INFO, "Exiting PPP discipline.\n"); | |
686 | /* Disconnect from the generic PPP layer */ | |
54064600 | 687 | lock_kernel(); |
1da177e4 LT |
688 | if(ap->ppp_open) |
689 | { | |
690 | ap->ppp_open = 0; | |
691 | ppp_unregister_channel(&ap->chan); | |
692 | } | |
693 | else | |
694 | DERROR(FS_ERROR, "Channel not registered !\n"); | |
695 | err = 0; | |
54064600 | 696 | unlock_kernel(); |
1da177e4 LT |
697 | } |
698 | break; | |
699 | ||
700 | /* Query PPP channel and unit number */ | |
701 | case PPPIOCGCHAN: | |
54064600 AC |
702 | if(ap->ppp_open && !put_user(ppp_channel_index(&ap->chan), |
703 | (int __user *)argp)) | |
704 | err = 0; | |
1da177e4 LT |
705 | break; |
706 | case PPPIOCGUNIT: | |
54064600 AC |
707 | lock_kernel(); |
708 | if(ap->ppp_open && !put_user(ppp_unit_number(&ap->chan), | |
709 | (int __user *)argp)) | |
1da177e4 LT |
710 | err = 0; |
711 | break; | |
712 | ||
713 | /* All these ioctls can be passed both directly and from ppp_generic, | |
714 | * so we just deal with them in one place... | |
715 | */ | |
716 | case PPPIOCGFLAGS: | |
717 | case PPPIOCSFLAGS: | |
718 | case PPPIOCGASYNCMAP: | |
719 | case PPPIOCSASYNCMAP: | |
720 | case PPPIOCGRASYNCMAP: | |
721 | case PPPIOCSRASYNCMAP: | |
722 | case PPPIOCGXASYNCMAP: | |
723 | case PPPIOCSXASYNCMAP: | |
724 | case PPPIOCGMRU: | |
725 | case PPPIOCSMRU: | |
726 | DEBUG(FS_INFO, "Standard PPP ioctl.\n"); | |
727 | if(!capable(CAP_NET_ADMIN)) | |
728 | err = -EPERM; | |
54064600 AC |
729 | else { |
730 | lock_kernel(); | |
1da177e4 | 731 | err = ppp_irnet_ioctl(&ap->chan, cmd, arg); |
54064600 AC |
732 | unlock_kernel(); |
733 | } | |
1da177e4 LT |
734 | break; |
735 | ||
736 | /* TTY IOCTLs : Pretend that we are a tty, to keep pppd happy */ | |
737 | /* Get termios */ | |
738 | case TCGETS: | |
739 | DEBUG(FS_INFO, "Get termios.\n"); | |
54064600 | 740 | lock_kernel(); |
49259d34 | 741 | #ifndef TCGETS2 |
54064600 AC |
742 | if(!kernel_termios_to_user_termios((struct termios __user *)argp, &ap->termios)) |
743 | err = 0; | |
49259d34 DM |
744 | #else |
745 | if(kernel_termios_to_user_termios_1((struct termios __user *)argp, &ap->termios)) | |
54064600 | 746 | err = 0; |
49259d34 | 747 | #endif |
54064600 | 748 | unlock_kernel(); |
1da177e4 LT |
749 | break; |
750 | /* Set termios */ | |
751 | case TCSETSF: | |
752 | DEBUG(FS_INFO, "Set termios.\n"); | |
54064600 | 753 | lock_kernel(); |
49259d34 | 754 | #ifndef TCGETS2 |
54064600 AC |
755 | if(!user_termios_to_kernel_termios(&ap->termios, (struct termios __user *)argp)) |
756 | err = 0; | |
49259d34 | 757 | #else |
54064600 AC |
758 | if(!user_termios_to_kernel_termios_1(&ap->termios, (struct termios __user *)argp)) |
759 | err = 0; | |
49259d34 | 760 | #endif |
54064600 | 761 | unlock_kernel(); |
1da177e4 LT |
762 | break; |
763 | ||
764 | /* Set DTR/RTS */ | |
6819bc2e | 765 | case TIOCMBIS: |
1da177e4 LT |
766 | case TIOCMBIC: |
767 | /* Set exclusive/non-exclusive mode */ | |
768 | case TIOCEXCL: | |
769 | case TIOCNXCL: | |
770 | DEBUG(FS_INFO, "TTY compatibility.\n"); | |
771 | err = 0; | |
772 | break; | |
773 | ||
774 | case TCGETA: | |
775 | DEBUG(FS_INFO, "TCGETA\n"); | |
776 | break; | |
777 | ||
778 | case TCFLSH: | |
779 | DEBUG(FS_INFO, "TCFLSH\n"); | |
780 | /* Note : this will flush buffers in PPP, so it *must* be done | |
781 | * We should also worry that we don't accept junk here and that | |
782 | * we get rid of our own buffers */ | |
783 | #ifdef FLUSH_TO_PPP | |
54064600 | 784 | lock_kernel(); |
1da177e4 | 785 | ppp_output_wakeup(&ap->chan); |
54064600 | 786 | unlock_kernel(); |
1da177e4 LT |
787 | #endif /* FLUSH_TO_PPP */ |
788 | err = 0; | |
789 | break; | |
790 | ||
791 | case FIONREAD: | |
792 | DEBUG(FS_INFO, "FIONREAD\n"); | |
793 | val = 0; | |
794 | if(put_user(val, (int __user *)argp)) | |
795 | break; | |
796 | err = 0; | |
797 | break; | |
798 | ||
799 | default: | |
800 | DERROR(FS_ERROR, "Unsupported ioctl (0x%X)\n", cmd); | |
54064600 | 801 | err = -ENOTTY; |
1da177e4 LT |
802 | } |
803 | ||
804 | DEXIT(FS_TRACE, " - err = 0x%X\n", err); | |
805 | return err; | |
806 | } | |
807 | ||
808 | /************************** PPP CALLBACKS **************************/ | |
809 | /* | |
810 | * This are the functions that the generic PPP driver in the kernel | |
811 | * will call to communicate to us. | |
812 | */ | |
813 | ||
814 | /*------------------------------------------------------------------*/ | |
815 | /* | |
816 | * Prepare the ppp frame for transmission over the IrDA socket. | |
817 | * We make sure that the header space is enough, and we change ppp header | |
818 | * according to flags passed by pppd. | |
819 | * This is not a callback, but just a helper function used in ppp_irnet_send() | |
820 | */ | |
821 | static inline struct sk_buff * | |
822 | irnet_prepare_skb(irnet_socket * ap, | |
823 | struct sk_buff * skb) | |
824 | { | |
825 | unsigned char * data; | |
826 | int proto; /* PPP protocol */ | |
827 | int islcp; /* Protocol == LCP */ | |
828 | int needaddr; /* Need PPP address */ | |
829 | ||
830 | DENTER(PPP_TRACE, "(ap=0x%p, skb=0x%p)\n", | |
831 | ap, skb); | |
832 | ||
833 | /* Extract PPP protocol from the frame */ | |
834 | data = skb->data; | |
835 | proto = (data[0] << 8) + data[1]; | |
836 | ||
837 | /* LCP packets with codes between 1 (configure-request) | |
838 | * and 7 (code-reject) must be sent as though no options | |
839 | * have been negotiated. */ | |
840 | islcp = (proto == PPP_LCP) && (1 <= data[2]) && (data[2] <= 7); | |
841 | ||
842 | /* compress protocol field if option enabled */ | |
843 | if((data[0] == 0) && (ap->flags & SC_COMP_PROT) && (!islcp)) | |
844 | skb_pull(skb,1); | |
845 | ||
846 | /* Check if we need address/control fields */ | |
847 | needaddr = 2*((ap->flags & SC_COMP_AC) == 0 || islcp); | |
848 | ||
849 | /* Is the skb headroom large enough to contain all IrDA-headers? */ | |
850 | if((skb_headroom(skb) < (ap->max_header_size + needaddr)) || | |
851 | (skb_shared(skb))) | |
852 | { | |
853 | struct sk_buff * new_skb; | |
854 | ||
855 | DEBUG(PPP_INFO, "Reallocating skb\n"); | |
856 | ||
857 | /* Create a new skb */ | |
858 | new_skb = skb_realloc_headroom(skb, ap->max_header_size + needaddr); | |
859 | ||
860 | /* We have to free the original skb anyway */ | |
861 | dev_kfree_skb(skb); | |
862 | ||
863 | /* Did the realloc succeed ? */ | |
864 | DABORT(new_skb == NULL, NULL, PPP_ERROR, "Could not realloc skb\n"); | |
865 | ||
866 | /* Use the new skb instead */ | |
867 | skb = new_skb; | |
868 | } | |
869 | ||
870 | /* prepend address/control fields if necessary */ | |
871 | if(needaddr) | |
872 | { | |
873 | skb_push(skb, 2); | |
874 | skb->data[0] = PPP_ALLSTATIONS; | |
875 | skb->data[1] = PPP_UI; | |
876 | } | |
877 | ||
878 | DEXIT(PPP_TRACE, "\n"); | |
879 | ||
880 | return skb; | |
881 | } | |
882 | ||
883 | /*------------------------------------------------------------------*/ | |
884 | /* | |
885 | * Send a packet to the peer over the IrTTP connection. | |
886 | * Returns 1 iff the packet was accepted. | |
887 | * Returns 0 iff packet was not consumed. | |
888 | * If the packet was not accepted, we will call ppp_output_wakeup | |
889 | * at some later time to reactivate flow control in ppp_generic. | |
890 | */ | |
891 | static int | |
892 | ppp_irnet_send(struct ppp_channel * chan, | |
893 | struct sk_buff * skb) | |
894 | { | |
895 | irnet_socket * self = (struct irnet_socket *) chan->private; | |
896 | int ret; | |
897 | ||
898 | DENTER(PPP_TRACE, "(channel=0x%p, ap/self=0x%p)\n", | |
899 | chan, self); | |
900 | ||
901 | /* Check if things are somewhat valid... */ | |
902 | DASSERT(self != NULL, 0, PPP_ERROR, "Self is NULL !!!\n"); | |
903 | ||
904 | /* Check if we are connected */ | |
905 | if(!(test_bit(0, &self->ttp_open))) | |
906 | { | |
907 | #ifdef CONNECT_IN_SEND | |
908 | /* Let's try to connect one more time... */ | |
909 | /* Note : we won't be connected after this call, but we should be | |
910 | * ready for next packet... */ | |
911 | /* If we are already connecting, this will fail */ | |
912 | irda_irnet_connect(self); | |
913 | #endif /* CONNECT_IN_SEND */ | |
914 | ||
915 | DEBUG(PPP_INFO, "IrTTP not ready ! (%ld-%ld)\n", | |
916 | self->ttp_open, self->ttp_connect); | |
917 | ||
918 | /* Note : we can either drop the packet or block the packet. | |
919 | * | |
920 | * Blocking the packet allow us a better connection time, | |
921 | * because by calling ppp_output_wakeup() we can have | |
922 | * ppp_generic resending the LCP request immediately to us, | |
923 | * rather than waiting for one of pppd periodic transmission of | |
924 | * LCP request. | |
925 | * | |
926 | * On the other hand, if we block all packet, all those periodic | |
927 | * transmissions of pppd accumulate in ppp_generic, creating a | |
928 | * backlog of LCP request. When we eventually connect later on, | |
929 | * we have to transmit all this backlog before we can connect | |
930 | * proper (if we don't timeout before). | |
931 | * | |
932 | * The current strategy is as follow : | |
933 | * While we are attempting to connect, we block packets to get | |
934 | * a better connection time. | |
935 | * If we fail to connect, we drain the queue and start dropping packets | |
936 | */ | |
937 | #ifdef BLOCK_WHEN_CONNECT | |
938 | /* If we are attempting to connect */ | |
939 | if(test_bit(0, &self->ttp_connect)) | |
940 | { | |
941 | /* Blocking packet, ppp_generic will retry later */ | |
942 | return 0; | |
943 | } | |
944 | #endif /* BLOCK_WHEN_CONNECT */ | |
945 | ||
946 | /* Dropping packet, pppd will retry later */ | |
947 | dev_kfree_skb(skb); | |
948 | return 1; | |
949 | } | |
950 | ||
951 | /* Check if the queue can accept any packet, otherwise block */ | |
952 | if(self->tx_flow != FLOW_START) | |
953 | DRETURN(0, PPP_INFO, "IrTTP queue full (%d skbs)...\n", | |
954 | skb_queue_len(&self->tsap->tx_queue)); | |
955 | ||
956 | /* Prepare ppp frame for transmission */ | |
957 | skb = irnet_prepare_skb(self, skb); | |
958 | DABORT(skb == NULL, 1, PPP_ERROR, "Prepare skb for Tx failed.\n"); | |
959 | ||
960 | /* Send the packet to IrTTP */ | |
961 | ret = irttp_data_request(self->tsap, skb); | |
962 | if(ret < 0) | |
963 | { | |
6819bc2e | 964 | /* |
1da177e4 LT |
965 | * > IrTTPs tx queue is full, so we just have to |
966 | * > drop the frame! You might think that we should | |
967 | * > just return -1 and don't deallocate the frame, | |
968 | * > but that is dangerous since it's possible that | |
969 | * > we have replaced the original skb with a new | |
970 | * > one with larger headroom, and that would really | |
971 | * > confuse do_dev_queue_xmit() in dev.c! I have | |
6819bc2e | 972 | * > tried :-) DB |
1da177e4 LT |
973 | * Correction : we verify the flow control above (self->tx_flow), |
974 | * so we come here only if IrTTP doesn't like the packet (empty, | |
975 | * too large, IrTTP not connected). In those rare cases, it's ok | |
976 | * to drop it, we don't want to see it here again... | |
977 | * Jean II | |
978 | */ | |
979 | DERROR(PPP_ERROR, "IrTTP doesn't like this packet !!! (0x%X)\n", ret); | |
980 | /* irttp_data_request already free the packet */ | |
981 | } | |
982 | ||
983 | DEXIT(PPP_TRACE, "\n"); | |
984 | return 1; /* Packet has been consumed */ | |
985 | } | |
986 | ||
987 | /*------------------------------------------------------------------*/ | |
988 | /* | |
989 | * Take care of the ioctls that ppp_generic doesn't want to deal with... | |
990 | * Note : we are also called from dev_irnet_ioctl(). | |
991 | */ | |
992 | static int | |
993 | ppp_irnet_ioctl(struct ppp_channel * chan, | |
994 | unsigned int cmd, | |
995 | unsigned long arg) | |
996 | { | |
997 | irnet_socket * ap = (struct irnet_socket *) chan->private; | |
998 | int err; | |
999 | int val; | |
1000 | u32 accm[8]; | |
1001 | void __user *argp = (void __user *)arg; | |
1002 | ||
1003 | DENTER(PPP_TRACE, "(channel=0x%p, ap=0x%p, cmd=0x%X)\n", | |
1004 | chan, ap, cmd); | |
1005 | ||
1006 | /* Basic checks... */ | |
1007 | DASSERT(ap != NULL, -ENXIO, PPP_ERROR, "ap is NULL...\n"); | |
1008 | ||
1009 | err = -EFAULT; | |
1010 | switch(cmd) | |
1011 | { | |
1012 | /* PPP flags */ | |
1013 | case PPPIOCGFLAGS: | |
1014 | val = ap->flags | ap->rbits; | |
1015 | if(put_user(val, (int __user *) argp)) | |
1016 | break; | |
1017 | err = 0; | |
1018 | break; | |
1019 | case PPPIOCSFLAGS: | |
1020 | if(get_user(val, (int __user *) argp)) | |
1021 | break; | |
1022 | ap->flags = val & ~SC_RCV_BITS; | |
1023 | ap->rbits = val & SC_RCV_BITS; | |
1024 | err = 0; | |
1025 | break; | |
1026 | ||
1027 | /* Async map stuff - all dummy to please pppd */ | |
1028 | case PPPIOCGASYNCMAP: | |
1029 | if(put_user(ap->xaccm[0], (u32 __user *) argp)) | |
1030 | break; | |
1031 | err = 0; | |
1032 | break; | |
1033 | case PPPIOCSASYNCMAP: | |
1034 | if(get_user(ap->xaccm[0], (u32 __user *) argp)) | |
1035 | break; | |
1036 | err = 0; | |
1037 | break; | |
1038 | case PPPIOCGRASYNCMAP: | |
1039 | if(put_user(ap->raccm, (u32 __user *) argp)) | |
1040 | break; | |
1041 | err = 0; | |
1042 | break; | |
1043 | case PPPIOCSRASYNCMAP: | |
1044 | if(get_user(ap->raccm, (u32 __user *) argp)) | |
1045 | break; | |
1046 | err = 0; | |
1047 | break; | |
1048 | case PPPIOCGXASYNCMAP: | |
1049 | if(copy_to_user(argp, ap->xaccm, sizeof(ap->xaccm))) | |
1050 | break; | |
1051 | err = 0; | |
1052 | break; | |
1053 | case PPPIOCSXASYNCMAP: | |
1054 | if(copy_from_user(accm, argp, sizeof(accm))) | |
1055 | break; | |
1056 | accm[2] &= ~0x40000000U; /* can't escape 0x5e */ | |
1057 | accm[3] |= 0x60000000U; /* must escape 0x7d, 0x7e */ | |
1058 | memcpy(ap->xaccm, accm, sizeof(ap->xaccm)); | |
1059 | err = 0; | |
1060 | break; | |
1061 | ||
1062 | /* Max PPP frame size */ | |
1063 | case PPPIOCGMRU: | |
1064 | if(put_user(ap->mru, (int __user *) argp)) | |
1065 | break; | |
1066 | err = 0; | |
1067 | break; | |
1068 | case PPPIOCSMRU: | |
1069 | if(get_user(val, (int __user *) argp)) | |
1070 | break; | |
1071 | if(val < PPP_MRU) | |
1072 | val = PPP_MRU; | |
1073 | ap->mru = val; | |
1074 | err = 0; | |
1075 | break; | |
1076 | ||
1077 | default: | |
1078 | DEBUG(PPP_INFO, "Unsupported ioctl (0x%X)\n", cmd); | |
1079 | err = -ENOIOCTLCMD; | |
1080 | } | |
1081 | ||
1082 | DEXIT(PPP_TRACE, " - err = 0x%X\n", err); | |
1083 | return err; | |
1084 | } | |
1085 | ||
1086 | /************************** INITIALISATION **************************/ | |
1087 | /* | |
1088 | * Module initialisation and all that jazz... | |
1089 | */ | |
1090 | ||
1091 | /*------------------------------------------------------------------*/ | |
1092 | /* | |
1093 | * Hook our device callbacks in the filesystem, to connect our code | |
1094 | * to /dev/irnet | |
1095 | */ | |
1096 | static inline int __init | |
1097 | ppp_irnet_init(void) | |
1098 | { | |
1099 | int err = 0; | |
1100 | ||
1101 | DENTER(MODULE_TRACE, "()\n"); | |
1102 | ||
1103 | /* Allocate ourselves as a minor in the misc range */ | |
1104 | err = misc_register(&irnet_misc_device); | |
1105 | ||
1106 | DEXIT(MODULE_TRACE, "\n"); | |
1107 | return err; | |
1108 | } | |
1109 | ||
1110 | /*------------------------------------------------------------------*/ | |
1111 | /* | |
1112 | * Cleanup at exit... | |
1113 | */ | |
1114 | static inline void __exit | |
1115 | ppp_irnet_cleanup(void) | |
1116 | { | |
1117 | DENTER(MODULE_TRACE, "()\n"); | |
1118 | ||
1119 | /* De-allocate /dev/irnet minor in misc range */ | |
1120 | misc_deregister(&irnet_misc_device); | |
1121 | ||
1122 | DEXIT(MODULE_TRACE, "\n"); | |
1123 | } | |
1124 | ||
1125 | /*------------------------------------------------------------------*/ | |
1126 | /* | |
1127 | * Module main entry point | |
1128 | */ | |
bf73d1c5 | 1129 | static int __init |
1da177e4 LT |
1130 | irnet_init(void) |
1131 | { | |
1132 | int err; | |
1133 | ||
1134 | /* Initialise both parts... */ | |
1135 | err = irda_irnet_init(); | |
1136 | if(!err) | |
1137 | err = ppp_irnet_init(); | |
1138 | return err; | |
1139 | } | |
1140 | ||
1141 | /*------------------------------------------------------------------*/ | |
1142 | /* | |
1143 | * Module exit | |
1144 | */ | |
1145 | static void __exit | |
1146 | irnet_cleanup(void) | |
1147 | { | |
1148 | irda_irnet_cleanup(); | |
1149 | ppp_irnet_cleanup(); | |
1150 | } | |
1151 | ||
1152 | /*------------------------------------------------------------------*/ | |
1153 | /* | |
1154 | * Module magic | |
1155 | */ | |
1156 | module_init(irnet_init); | |
1157 | module_exit(irnet_cleanup); | |
1158 | MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>"); | |
6819bc2e | 1159 | MODULE_DESCRIPTION("IrNET : Synchronous PPP over IrDA"); |
1da177e4 LT |
1160 | MODULE_LICENSE("GPL"); |
1161 | MODULE_ALIAS_CHARDEV(10, 187); |