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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 | ||
d43c36dc | 16 | #include <linux/sched.h> |
405f5571 | 17 | #include <linux/smp_lock.h> |
1da177e4 LT |
18 | #include "irnet_ppp.h" /* Private header */ |
19 | /* Please put other headers in irnet.h - Thanks */ | |
20 | ||
21 | /* Generic PPP callbacks (to call us) */ | |
22 | static struct ppp_channel_ops irnet_ppp_ops = { | |
23 | .start_xmit = ppp_irnet_send, | |
24 | .ioctl = ppp_irnet_ioctl | |
25 | }; | |
26 | ||
27 | /************************* CONTROL CHANNEL *************************/ | |
28 | /* | |
29 | * When a pppd instance is not active on /dev/irnet, it acts as a control | |
30 | * channel. | |
31 | * Writing allow to set up the IrDA destination of the IrNET channel, | |
32 | * and any application may be read events happening in IrNET... | |
33 | */ | |
34 | ||
35 | /*------------------------------------------------------------------*/ | |
36 | /* | |
37 | * Write is used to send a command to configure a IrNET channel | |
38 | * before it is open by pppd. The syntax is : "command argument" | |
39 | * Currently there is only two defined commands : | |
40 | * o name : set the requested IrDA nickname of the IrNET peer. | |
41 | * o addr : set the requested IrDA address of the IrNET peer. | |
42 | * Note : the code is crude, but effective... | |
43 | */ | |
44 | static inline ssize_t | |
45 | irnet_ctrl_write(irnet_socket * ap, | |
46 | const char __user *buf, | |
47 | size_t count) | |
48 | { | |
49 | char command[IRNET_MAX_COMMAND]; | |
50 | char * start; /* Current command being processed */ | |
51 | char * next; /* Next command to process */ | |
52 | int length; /* Length of current command */ | |
53 | ||
54 | DENTER(CTRL_TRACE, "(ap=0x%p, count=%Zd)\n", ap, count); | |
55 | ||
56 | /* Check for overflow... */ | |
57 | DABORT(count >= IRNET_MAX_COMMAND, -ENOMEM, | |
58 | CTRL_ERROR, "Too much data !!!\n"); | |
59 | ||
60 | /* Get the data in the driver */ | |
61 | if(copy_from_user(command, buf, count)) | |
62 | { | |
63 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
64 | return -EFAULT; | |
65 | } | |
66 | ||
67 | /* Safe terminate the string */ | |
68 | command[count] = '\0'; | |
69 | DEBUG(CTRL_INFO, "Command line received is ``%s'' (%Zd).\n", | |
70 | command, count); | |
71 | ||
72 | /* Check every commands in the command line */ | |
73 | next = command; | |
74 | while(next != NULL) | |
75 | { | |
76 | /* Look at the next command */ | |
77 | start = next; | |
78 | ||
e7d2860b AGR |
79 | /* Scrap whitespaces before the command */ |
80 | start = skip_spaces(start); | |
1da177e4 LT |
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 */ | |
e7d2860b | 135 | begp = skip_spaces(begp); |
1da177e4 LT |
136 | |
137 | /* Convert argument to a number (last arg is the base) */ | |
138 | addr = simple_strtoul(begp, &endp, 16); | |
139 | /* Has it worked ? (endp should be start + length) */ | |
140 | DABORT(endp <= (start + 5), -EINVAL, | |
141 | CTRL_ERROR, "Invalid address.\n"); | |
142 | } | |
143 | /* Which type of address ? */ | |
144 | if(start[0] == 's') | |
145 | { | |
146 | /* Save it */ | |
147 | ap->rsaddr = addr; | |
148 | DEBUG(CTRL_INFO, "Got rsaddr = %08x\n", ap->rsaddr); | |
149 | } | |
150 | else | |
151 | { | |
152 | /* Save it */ | |
153 | ap->rdaddr = addr; | |
154 | DEBUG(CTRL_INFO, "Got rdaddr = %08x\n", ap->rdaddr); | |
155 | } | |
156 | ||
157 | /* Restart the loop */ | |
158 | continue; | |
159 | } | |
160 | ||
161 | /* Other possible command : connect N (number of retries) */ | |
162 | ||
163 | /* No command matched -> Failed... */ | |
164 | DABORT(1, -EINVAL, CTRL_ERROR, "Not a recognised IrNET command.\n"); | |
165 | } | |
166 | ||
167 | /* Success : we have parsed all commands successfully */ | |
168 | return(count); | |
169 | } | |
170 | ||
171 | #ifdef INITIAL_DISCOVERY | |
172 | /*------------------------------------------------------------------*/ | |
173 | /* | |
174 | * Function irnet_get_discovery_log (self) | |
175 | * | |
176 | * Query the content on the discovery log if not done | |
177 | * | |
178 | * This function query the current content of the discovery log | |
179 | * at the startup of the event channel and save it in the internal struct. | |
180 | */ | |
181 | static void | |
182 | irnet_get_discovery_log(irnet_socket * ap) | |
183 | { | |
184 | __u16 mask = irlmp_service_to_hint(S_LAN); | |
185 | ||
186 | /* Ask IrLMP for the current discovery log */ | |
187 | ap->discoveries = irlmp_get_discoveries(&ap->disco_number, mask, | |
188 | DISCOVERY_DEFAULT_SLOTS); | |
189 | ||
190 | /* Check if the we got some results */ | |
191 | if(ap->discoveries == NULL) | |
192 | ap->disco_number = -1; | |
193 | ||
194 | DEBUG(CTRL_INFO, "Got the log (0x%p), size is %d\n", | |
195 | ap->discoveries, ap->disco_number); | |
196 | } | |
197 | ||
198 | /*------------------------------------------------------------------*/ | |
199 | /* | |
200 | * Function irnet_read_discovery_log (self, event) | |
201 | * | |
202 | * Read the content on the discovery log | |
203 | * | |
204 | * This function dump the current content of the discovery log | |
205 | * at the startup of the event channel. | |
206 | * Return 1 if wrote an event on the control channel... | |
207 | * | |
208 | * State of the ap->disco_XXX variables : | |
209 | * Socket creation : discoveries = NULL ; disco_index = 0 ; disco_number = 0 | |
210 | * While reading : discoveries = ptr ; disco_index = X ; disco_number = Y | |
211 | * After reading : discoveries = NULL ; disco_index = Y ; disco_number = -1 | |
212 | */ | |
213 | static inline int | |
214 | irnet_read_discovery_log(irnet_socket * ap, | |
215 | char * event) | |
216 | { | |
217 | int done_event = 0; | |
218 | ||
219 | DENTER(CTRL_TRACE, "(ap=0x%p, event=0x%p)\n", | |
220 | ap, event); | |
221 | ||
222 | /* Test if we have some work to do or we have already finished */ | |
223 | if(ap->disco_number == -1) | |
224 | { | |
225 | DEBUG(CTRL_INFO, "Already done\n"); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | /* Test if it's the first time and therefore we need to get the log */ | |
230 | if(ap->discoveries == NULL) | |
231 | irnet_get_discovery_log(ap); | |
232 | ||
233 | /* Check if we have more item to dump */ | |
234 | if(ap->disco_index < ap->disco_number) | |
235 | { | |
236 | /* Write an event */ | |
237 | sprintf(event, "Found %08x (%s) behind %08x {hints %02X-%02X}\n", | |
238 | ap->discoveries[ap->disco_index].daddr, | |
239 | ap->discoveries[ap->disco_index].info, | |
240 | ap->discoveries[ap->disco_index].saddr, | |
241 | ap->discoveries[ap->disco_index].hints[0], | |
242 | ap->discoveries[ap->disco_index].hints[1]); | |
243 | DEBUG(CTRL_INFO, "Writing discovery %d : %s\n", | |
244 | ap->disco_index, ap->discoveries[ap->disco_index].info); | |
245 | ||
246 | /* We have an event */ | |
247 | done_event = 1; | |
248 | /* Next discovery */ | |
249 | ap->disco_index++; | |
250 | } | |
251 | ||
252 | /* Check if we have done the last item */ | |
253 | if(ap->disco_index >= ap->disco_number) | |
254 | { | |
255 | /* No more items : remove the log and signal termination */ | |
256 | DEBUG(CTRL_INFO, "Cleaning up log (0x%p)\n", | |
257 | ap->discoveries); | |
258 | if(ap->discoveries != NULL) | |
259 | { | |
260 | /* Cleanup our copy of the discovery log */ | |
261 | kfree(ap->discoveries); | |
262 | ap->discoveries = NULL; | |
263 | } | |
264 | ap->disco_number = -1; | |
265 | } | |
266 | ||
267 | return done_event; | |
268 | } | |
269 | #endif /* INITIAL_DISCOVERY */ | |
270 | ||
271 | /*------------------------------------------------------------------*/ | |
272 | /* | |
273 | * Read is used to get IrNET events | |
274 | */ | |
275 | static inline ssize_t | |
276 | irnet_ctrl_read(irnet_socket * ap, | |
277 | struct file * file, | |
278 | char __user * buf, | |
279 | size_t count) | |
280 | { | |
281 | DECLARE_WAITQUEUE(wait, current); | |
282 | char event[64]; /* Max event is 61 char */ | |
283 | ssize_t ret = 0; | |
284 | ||
285 | DENTER(CTRL_TRACE, "(ap=0x%p, count=%Zd)\n", ap, count); | |
286 | ||
287 | /* Check if we can write an event out in one go */ | |
288 | DABORT(count < sizeof(event), -EOVERFLOW, CTRL_ERROR, "Buffer to small.\n"); | |
289 | ||
290 | #ifdef INITIAL_DISCOVERY | |
291 | /* Check if we have read the log */ | |
292 | if(irnet_read_discovery_log(ap, event)) | |
293 | { | |
294 | /* We have an event !!! Copy it to the user */ | |
295 | if(copy_to_user(buf, event, strlen(event))) | |
296 | { | |
297 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
298 | return -EFAULT; | |
299 | } | |
300 | ||
301 | DEXIT(CTRL_TRACE, "\n"); | |
302 | return(strlen(event)); | |
303 | } | |
304 | #endif /* INITIAL_DISCOVERY */ | |
305 | ||
306 | /* Put ourselves on the wait queue to be woken up */ | |
307 | add_wait_queue(&irnet_events.rwait, &wait); | |
308 | current->state = TASK_INTERRUPTIBLE; | |
309 | for(;;) | |
310 | { | |
311 | /* If there is unread events */ | |
312 | ret = 0; | |
313 | if(ap->event_index != irnet_events.index) | |
314 | break; | |
315 | ret = -EAGAIN; | |
316 | if(file->f_flags & O_NONBLOCK) | |
317 | break; | |
318 | ret = -ERESTARTSYS; | |
319 | if(signal_pending(current)) | |
320 | break; | |
321 | /* Yield and wait to be woken up */ | |
322 | schedule(); | |
323 | } | |
324 | current->state = TASK_RUNNING; | |
325 | remove_wait_queue(&irnet_events.rwait, &wait); | |
326 | ||
327 | /* Did we got it ? */ | |
328 | if(ret != 0) | |
329 | { | |
330 | /* No, return the error code */ | |
331 | DEXIT(CTRL_TRACE, " - ret %Zd\n", ret); | |
332 | return ret; | |
333 | } | |
334 | ||
335 | /* Which event is it ? */ | |
336 | switch(irnet_events.log[ap->event_index].event) | |
337 | { | |
338 | case IRNET_DISCOVER: | |
339 | sprintf(event, "Discovered %08x (%s) behind %08x {hints %02X-%02X}\n", | |
340 | irnet_events.log[ap->event_index].daddr, | |
341 | irnet_events.log[ap->event_index].name, | |
342 | irnet_events.log[ap->event_index].saddr, | |
343 | irnet_events.log[ap->event_index].hints.byte[0], | |
344 | irnet_events.log[ap->event_index].hints.byte[1]); | |
345 | break; | |
346 | case IRNET_EXPIRE: | |
347 | sprintf(event, "Expired %08x (%s) behind %08x {hints %02X-%02X}\n", | |
348 | irnet_events.log[ap->event_index].daddr, | |
349 | irnet_events.log[ap->event_index].name, | |
350 | irnet_events.log[ap->event_index].saddr, | |
351 | irnet_events.log[ap->event_index].hints.byte[0], | |
352 | irnet_events.log[ap->event_index].hints.byte[1]); | |
353 | break; | |
354 | case IRNET_CONNECT_TO: | |
355 | sprintf(event, "Connected to %08x (%s) on ppp%d\n", | |
356 | irnet_events.log[ap->event_index].daddr, | |
357 | irnet_events.log[ap->event_index].name, | |
358 | irnet_events.log[ap->event_index].unit); | |
359 | break; | |
360 | case IRNET_CONNECT_FROM: | |
361 | sprintf(event, "Connection from %08x (%s) on ppp%d\n", | |
362 | irnet_events.log[ap->event_index].daddr, | |
363 | irnet_events.log[ap->event_index].name, | |
364 | irnet_events.log[ap->event_index].unit); | |
365 | break; | |
366 | case IRNET_REQUEST_FROM: | |
367 | sprintf(event, "Request from %08x (%s) behind %08x\n", | |
368 | irnet_events.log[ap->event_index].daddr, | |
369 | irnet_events.log[ap->event_index].name, | |
370 | irnet_events.log[ap->event_index].saddr); | |
371 | break; | |
372 | case IRNET_NOANSWER_FROM: | |
373 | sprintf(event, "No-answer from %08x (%s) on ppp%d\n", | |
374 | irnet_events.log[ap->event_index].daddr, | |
375 | irnet_events.log[ap->event_index].name, | |
376 | irnet_events.log[ap->event_index].unit); | |
377 | break; | |
378 | case IRNET_BLOCKED_LINK: | |
379 | sprintf(event, "Blocked link with %08x (%s) on ppp%d\n", | |
380 | irnet_events.log[ap->event_index].daddr, | |
381 | irnet_events.log[ap->event_index].name, | |
382 | irnet_events.log[ap->event_index].unit); | |
383 | break; | |
384 | case IRNET_DISCONNECT_FROM: | |
385 | sprintf(event, "Disconnection from %08x (%s) on ppp%d\n", | |
386 | irnet_events.log[ap->event_index].daddr, | |
387 | irnet_events.log[ap->event_index].name, | |
388 | irnet_events.log[ap->event_index].unit); | |
389 | break; | |
390 | case IRNET_DISCONNECT_TO: | |
391 | sprintf(event, "Disconnected to %08x (%s)\n", | |
392 | irnet_events.log[ap->event_index].daddr, | |
393 | irnet_events.log[ap->event_index].name); | |
394 | break; | |
395 | default: | |
396 | sprintf(event, "Bug\n"); | |
397 | } | |
398 | /* Increment our event index */ | |
399 | ap->event_index = (ap->event_index + 1) % IRNET_MAX_EVENTS; | |
400 | ||
401 | DEBUG(CTRL_INFO, "Event is :%s", event); | |
402 | ||
403 | /* Copy it to the user */ | |
404 | if(copy_to_user(buf, event, strlen(event))) | |
405 | { | |
406 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
407 | return -EFAULT; | |
408 | } | |
409 | ||
410 | DEXIT(CTRL_TRACE, "\n"); | |
411 | return(strlen(event)); | |
412 | } | |
413 | ||
414 | /*------------------------------------------------------------------*/ | |
415 | /* | |
416 | * Poll : called when someone do a select on /dev/irnet. | |
417 | * Just check if there are new events... | |
418 | */ | |
419 | static inline unsigned int | |
420 | irnet_ctrl_poll(irnet_socket * ap, | |
421 | struct file * file, | |
422 | poll_table * wait) | |
423 | { | |
424 | unsigned int mask; | |
425 | ||
426 | DENTER(CTRL_TRACE, "(ap=0x%p)\n", ap); | |
427 | ||
428 | poll_wait(file, &irnet_events.rwait, wait); | |
429 | mask = POLLOUT | POLLWRNORM; | |
430 | /* If there is unread events */ | |
431 | if(ap->event_index != irnet_events.index) | |
432 | mask |= POLLIN | POLLRDNORM; | |
433 | #ifdef INITIAL_DISCOVERY | |
434 | if(ap->disco_number != -1) | |
435 | { | |
436 | /* Test if it's the first time and therefore we need to get the log */ | |
437 | if(ap->discoveries == NULL) | |
438 | irnet_get_discovery_log(ap); | |
439 | /* Recheck */ | |
440 | if(ap->disco_number != -1) | |
441 | mask |= POLLIN | POLLRDNORM; | |
442 | } | |
443 | #endif /* INITIAL_DISCOVERY */ | |
444 | ||
445 | DEXIT(CTRL_TRACE, " - mask=0x%X\n", mask); | |
446 | return mask; | |
447 | } | |
448 | ||
449 | ||
450 | /*********************** FILESYSTEM CALLBACKS ***********************/ | |
451 | /* | |
452 | * Implement the usual open, read, write functions that will be called | |
453 | * by the file system when some action is performed on /dev/irnet. | |
454 | * Most of those actions will in fact be performed by "pppd" or | |
455 | * the control channel, we just act as a redirector... | |
456 | */ | |
457 | ||
458 | /*------------------------------------------------------------------*/ | |
459 | /* | |
460 | * Open : when somebody open /dev/irnet | |
461 | * We basically create a new instance of irnet and initialise it. | |
462 | */ | |
463 | static int | |
464 | dev_irnet_open(struct inode * inode, | |
465 | struct file * file) | |
466 | { | |
467 | struct irnet_socket * ap; | |
468 | int err; | |
469 | ||
470 | DENTER(FS_TRACE, "(file=0x%p)\n", file); | |
471 | ||
472 | #ifdef SECURE_DEVIRNET | |
473 | /* This could (should?) be enforced by the permissions on /dev/irnet. */ | |
474 | if(!capable(CAP_NET_ADMIN)) | |
475 | return -EPERM; | |
476 | #endif /* SECURE_DEVIRNET */ | |
477 | ||
478 | /* Allocate a private structure for this IrNET instance */ | |
0da974f4 | 479 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
1da177e4 LT |
480 | DABORT(ap == NULL, -ENOMEM, FS_ERROR, "Can't allocate struct irnet...\n"); |
481 | ||
cddf63d9 | 482 | lock_kernel(); |
1da177e4 | 483 | /* initialize the irnet structure */ |
1da177e4 LT |
484 | ap->file = file; |
485 | ||
486 | /* PPP channel setup */ | |
487 | ap->ppp_open = 0; | |
488 | ap->chan.private = ap; | |
489 | ap->chan.ops = &irnet_ppp_ops; | |
490 | ap->chan.mtu = (2048 - TTP_MAX_HEADER - 2 - PPP_HDRLEN); | |
491 | ap->chan.hdrlen = 2 + TTP_MAX_HEADER; /* for A/C + Max IrDA hdr */ | |
492 | /* PPP parameters */ | |
493 | ap->mru = (2048 - TTP_MAX_HEADER - 2 - PPP_HDRLEN); | |
494 | ap->xaccm[0] = ~0U; | |
495 | ap->xaccm[3] = 0x60000000U; | |
496 | ap->raccm = ~0U; | |
497 | ||
498 | /* Setup the IrDA part... */ | |
499 | err = irda_irnet_create(ap); | |
500 | if(err) | |
501 | { | |
502 | DERROR(FS_ERROR, "Can't setup IrDA link...\n"); | |
503 | kfree(ap); | |
cddf63d9 | 504 | unlock_kernel(); |
1da177e4 LT |
505 | return err; |
506 | } | |
507 | ||
508 | /* For the control channel */ | |
509 | ap->event_index = irnet_events.index; /* Cancel all past events */ | |
510 | ||
511 | /* Put our stuff where we will be able to find it later */ | |
512 | file->private_data = ap; | |
513 | ||
514 | DEXIT(FS_TRACE, " - ap=0x%p\n", ap); | |
cddf63d9 | 515 | unlock_kernel(); |
1da177e4 LT |
516 | return 0; |
517 | } | |
518 | ||
519 | ||
520 | /*------------------------------------------------------------------*/ | |
521 | /* | |
522 | * Close : when somebody close /dev/irnet | |
523 | * Destroy the instance of /dev/irnet | |
524 | */ | |
525 | static int | |
526 | dev_irnet_close(struct inode * inode, | |
527 | struct file * file) | |
528 | { | |
529 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
530 | ||
531 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p)\n", | |
532 | file, ap); | |
533 | DABORT(ap == NULL, 0, FS_ERROR, "ap is NULL !!!\n"); | |
534 | ||
535 | /* Detach ourselves */ | |
536 | file->private_data = NULL; | |
537 | ||
538 | /* Close IrDA stuff */ | |
539 | irda_irnet_destroy(ap); | |
540 | ||
541 | /* Disconnect from the generic PPP layer if not already done */ | |
542 | if(ap->ppp_open) | |
543 | { | |
544 | DERROR(FS_ERROR, "Channel still registered - deregistering !\n"); | |
545 | ap->ppp_open = 0; | |
546 | ppp_unregister_channel(&ap->chan); | |
547 | } | |
548 | ||
549 | kfree(ap); | |
550 | ||
551 | DEXIT(FS_TRACE, "\n"); | |
552 | return 0; | |
553 | } | |
554 | ||
555 | /*------------------------------------------------------------------*/ | |
556 | /* | |
557 | * Write does nothing. | |
558 | * (we receive packet from ppp_generic through ppp_irnet_send()) | |
559 | */ | |
560 | static ssize_t | |
561 | dev_irnet_write(struct file * file, | |
562 | const char __user *buf, | |
563 | size_t count, | |
564 | loff_t * ppos) | |
565 | { | |
566 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
567 | ||
568 | DPASS(FS_TRACE, "(file=0x%p, ap=0x%p, count=%Zd)\n", | |
569 | file, ap, count); | |
570 | DABORT(ap == NULL, -ENXIO, FS_ERROR, "ap is NULL !!!\n"); | |
571 | ||
572 | /* If we are connected to ppp_generic, let it handle the job */ | |
573 | if(ap->ppp_open) | |
574 | return -EAGAIN; | |
575 | else | |
576 | return irnet_ctrl_write(ap, buf, count); | |
577 | } | |
578 | ||
579 | /*------------------------------------------------------------------*/ | |
580 | /* | |
581 | * Read doesn't do much either. | |
582 | * (pppd poll us, but ultimately reads through /dev/ppp) | |
583 | */ | |
584 | static ssize_t | |
585 | dev_irnet_read(struct file * file, | |
586 | char __user * buf, | |
587 | size_t count, | |
588 | loff_t * ppos) | |
589 | { | |
590 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
591 | ||
592 | DPASS(FS_TRACE, "(file=0x%p, ap=0x%p, count=%Zd)\n", | |
593 | file, ap, count); | |
594 | DABORT(ap == NULL, -ENXIO, FS_ERROR, "ap is NULL !!!\n"); | |
595 | ||
596 | /* If we are connected to ppp_generic, let it handle the job */ | |
597 | if(ap->ppp_open) | |
598 | return -EAGAIN; | |
599 | else | |
600 | return irnet_ctrl_read(ap, file, buf, count); | |
601 | } | |
602 | ||
603 | /*------------------------------------------------------------------*/ | |
604 | /* | |
605 | * Poll : called when someone do a select on /dev/irnet | |
606 | */ | |
607 | static unsigned int | |
608 | dev_irnet_poll(struct file * file, | |
609 | poll_table * wait) | |
610 | { | |
611 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
612 | unsigned int mask; | |
613 | ||
614 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p)\n", | |
615 | file, ap); | |
616 | ||
617 | mask = POLLOUT | POLLWRNORM; | |
618 | DABORT(ap == NULL, mask, FS_ERROR, "ap is NULL !!!\n"); | |
619 | ||
620 | /* If we are connected to ppp_generic, let it handle the job */ | |
621 | if(!ap->ppp_open) | |
622 | mask |= irnet_ctrl_poll(ap, file, wait); | |
623 | ||
624 | DEXIT(FS_TRACE, " - mask=0x%X\n", mask); | |
625 | return(mask); | |
626 | } | |
627 | ||
628 | /*------------------------------------------------------------------*/ | |
629 | /* | |
630 | * IOCtl : Called when someone does some ioctls on /dev/irnet | |
631 | * This is the way pppd configure us and control us while the PPP | |
632 | * instance is active. | |
633 | */ | |
54064600 AC |
634 | static long |
635 | dev_irnet_ioctl( | |
1da177e4 LT |
636 | struct file * file, |
637 | unsigned int cmd, | |
638 | unsigned long arg) | |
639 | { | |
640 | irnet_socket * ap = (struct irnet_socket *) file->private_data; | |
641 | int err; | |
642 | int val; | |
643 | void __user *argp = (void __user *)arg; | |
644 | ||
645 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p, cmd=0x%X)\n", | |
646 | file, ap, cmd); | |
647 | ||
648 | /* Basic checks... */ | |
649 | DASSERT(ap != NULL, -ENXIO, PPP_ERROR, "ap is NULL...\n"); | |
650 | #ifdef SECURE_DEVIRNET | |
651 | if(!capable(CAP_NET_ADMIN)) | |
652 | return -EPERM; | |
653 | #endif /* SECURE_DEVIRNET */ | |
654 | ||
655 | err = -EFAULT; | |
656 | switch(cmd) | |
657 | { | |
658 | /* Set discipline (should be N_SYNC_PPP or N_TTY) */ | |
659 | case TIOCSETD: | |
660 | if(get_user(val, (int __user *)argp)) | |
661 | break; | |
662 | if((val == N_SYNC_PPP) || (val == N_PPP)) | |
663 | { | |
664 | DEBUG(FS_INFO, "Entering PPP discipline.\n"); | |
665 | /* PPP channel setup (ap->chan in configued in dev_irnet_open())*/ | |
54064600 | 666 | lock_kernel(); |
1da177e4 LT |
667 | err = ppp_register_channel(&ap->chan); |
668 | if(err == 0) | |
669 | { | |
670 | /* Our ppp side is active */ | |
671 | ap->ppp_open = 1; | |
672 | ||
673 | DEBUG(FS_INFO, "Trying to establish a connection.\n"); | |
674 | /* Setup the IrDA link now - may fail... */ | |
675 | irda_irnet_connect(ap); | |
676 | } | |
677 | else | |
678 | DERROR(FS_ERROR, "Can't setup PPP channel...\n"); | |
54064600 | 679 | unlock_kernel(); |
1da177e4 LT |
680 | } |
681 | else | |
682 | { | |
683 | /* In theory, should be N_TTY */ | |
684 | DEBUG(FS_INFO, "Exiting PPP discipline.\n"); | |
685 | /* Disconnect from the generic PPP layer */ | |
54064600 | 686 | lock_kernel(); |
1da177e4 LT |
687 | if(ap->ppp_open) |
688 | { | |
689 | ap->ppp_open = 0; | |
690 | ppp_unregister_channel(&ap->chan); | |
691 | } | |
692 | else | |
693 | DERROR(FS_ERROR, "Channel not registered !\n"); | |
694 | err = 0; | |
54064600 | 695 | unlock_kernel(); |
1da177e4 LT |
696 | } |
697 | break; | |
698 | ||
699 | /* Query PPP channel and unit number */ | |
700 | case PPPIOCGCHAN: | |
54064600 AC |
701 | if(ap->ppp_open && !put_user(ppp_channel_index(&ap->chan), |
702 | (int __user *)argp)) | |
703 | err = 0; | |
1da177e4 LT |
704 | break; |
705 | case PPPIOCGUNIT: | |
54064600 AC |
706 | lock_kernel(); |
707 | if(ap->ppp_open && !put_user(ppp_unit_number(&ap->chan), | |
708 | (int __user *)argp)) | |
454debe4 TLSC |
709 | err = 0; |
710 | unlock_kernel(); | |
1da177e4 LT |
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); |