Commit | Line | Data |
---|---|---|
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 | ||
174cd4b1 | 16 | #include <linux/sched/signal.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
174cd4b1 | 18 | |
1da177e4 LT |
19 | #include "irnet_ppp.h" /* Private header */ |
20 | /* Please put other headers in irnet.h - Thanks */ | |
21 | ||
22 | /* Generic PPP callbacks (to call us) */ | |
d7100da0 | 23 | static const struct ppp_channel_ops irnet_ppp_ops = { |
1da177e4 LT |
24 | .start_xmit = ppp_irnet_send, |
25 | .ioctl = ppp_irnet_ioctl | |
26 | }; | |
27 | ||
28 | /************************* CONTROL CHANNEL *************************/ | |
29 | /* | |
30 | * When a pppd instance is not active on /dev/irnet, it acts as a control | |
31 | * channel. | |
32 | * Writing allow to set up the IrDA destination of the IrNET channel, | |
33 | * and any application may be read events happening in IrNET... | |
34 | */ | |
35 | ||
36 | /*------------------------------------------------------------------*/ | |
37 | /* | |
38 | * Write is used to send a command to configure a IrNET channel | |
39 | * before it is open by pppd. The syntax is : "command argument" | |
40 | * Currently there is only two defined commands : | |
41 | * o name : set the requested IrDA nickname of the IrNET peer. | |
42 | * o addr : set the requested IrDA address of the IrNET peer. | |
43 | * Note : the code is crude, but effective... | |
44 | */ | |
45 | static inline ssize_t | |
46 | irnet_ctrl_write(irnet_socket * ap, | |
47 | const char __user *buf, | |
48 | size_t count) | |
49 | { | |
50 | char command[IRNET_MAX_COMMAND]; | |
51 | char * start; /* Current command being processed */ | |
52 | char * next; /* Next command to process */ | |
53 | int length; /* Length of current command */ | |
54 | ||
5b5e0928 | 55 | DENTER(CTRL_TRACE, "(ap=0x%p, count=%zd)\n", ap, count); |
1da177e4 LT |
56 | |
57 | /* Check for overflow... */ | |
58 | DABORT(count >= IRNET_MAX_COMMAND, -ENOMEM, | |
59 | CTRL_ERROR, "Too much data !!!\n"); | |
60 | ||
61 | /* Get the data in the driver */ | |
62 | if(copy_from_user(command, buf, count)) | |
63 | { | |
64 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
65 | return -EFAULT; | |
66 | } | |
67 | ||
68 | /* Safe terminate the string */ | |
69 | command[count] = '\0'; | |
5b5e0928 | 70 | DEBUG(CTRL_INFO, "Command line received is ``%s'' (%zd).\n", |
1da177e4 LT |
71 | command, count); |
72 | ||
73 | /* Check every commands in the command line */ | |
74 | next = command; | |
75 | while(next != NULL) | |
76 | { | |
77 | /* Look at the next command */ | |
78 | start = next; | |
79 | ||
e7d2860b AGR |
80 | /* Scrap whitespaces before the command */ |
81 | start = skip_spaces(start); | |
1da177e4 LT |
82 | |
83 | /* ',' is our command separator */ | |
84 | next = strchr(start, ','); | |
85 | if(next) | |
86 | { | |
87 | *next = '\0'; /* Terminate command */ | |
88 | length = next - start; /* Length */ | |
89 | next++; /* Skip the '\0' */ | |
90 | } | |
91 | else | |
92 | length = strlen(start); | |
93 | ||
94 | DEBUG(CTRL_INFO, "Found command ``%s'' (%d).\n", start, length); | |
95 | ||
96 | /* Check if we recognised one of the known command | |
97 | * We can't use "switch" with strings, so hack with "continue" */ | |
6819bc2e | 98 | |
1da177e4 LT |
99 | /* First command : name -> Requested IrDA nickname */ |
100 | if(!strncmp(start, "name", 4)) | |
101 | { | |
102 | /* Copy the name only if is included and not "any" */ | |
103 | if((length > 5) && (strcmp(start + 5, "any"))) | |
104 | { | |
105 | /* Strip out trailing whitespaces */ | |
106 | while(isspace(start[length - 1])) | |
107 | length--; | |
108 | ||
d50e7e36 DR |
109 | DABORT(length < 5 || length > NICKNAME_MAX_LEN + 5, |
110 | -EINVAL, CTRL_ERROR, "Invalid nickname.\n"); | |
111 | ||
1da177e4 LT |
112 | /* Copy the name for later reuse */ |
113 | memcpy(ap->rname, start + 5, length - 5); | |
114 | ap->rname[length - 5] = '\0'; | |
115 | } | |
116 | else | |
117 | ap->rname[0] = '\0'; | |
118 | DEBUG(CTRL_INFO, "Got rname = ``%s''\n", ap->rname); | |
119 | ||
120 | /* Restart the loop */ | |
121 | continue; | |
122 | } | |
123 | ||
124 | /* Second command : addr, daddr -> Requested IrDA destination address | |
125 | * Also process : saddr -> Requested IrDA source address */ | |
126 | if((!strncmp(start, "addr", 4)) || | |
127 | (!strncmp(start, "daddr", 5)) || | |
128 | (!strncmp(start, "saddr", 5))) | |
129 | { | |
130 | __u32 addr = DEV_ADDR_ANY; | |
131 | ||
132 | /* Copy the address only if is included and not "any" */ | |
133 | if((length > 5) && (strcmp(start + 5, "any"))) | |
134 | { | |
135 | char * begp = start + 5; | |
136 | char * endp; | |
137 | ||
138 | /* Scrap whitespaces before the command */ | |
e7d2860b | 139 | begp = skip_spaces(begp); |
1da177e4 LT |
140 | |
141 | /* Convert argument to a number (last arg is the base) */ | |
142 | addr = simple_strtoul(begp, &endp, 16); | |
143 | /* Has it worked ? (endp should be start + length) */ | |
144 | DABORT(endp <= (start + 5), -EINVAL, | |
145 | CTRL_ERROR, "Invalid address.\n"); | |
146 | } | |
147 | /* Which type of address ? */ | |
148 | if(start[0] == 's') | |
149 | { | |
150 | /* Save it */ | |
151 | ap->rsaddr = addr; | |
152 | DEBUG(CTRL_INFO, "Got rsaddr = %08x\n", ap->rsaddr); | |
153 | } | |
154 | else | |
155 | { | |
156 | /* Save it */ | |
157 | ap->rdaddr = addr; | |
158 | DEBUG(CTRL_INFO, "Got rdaddr = %08x\n", ap->rdaddr); | |
159 | } | |
160 | ||
161 | /* Restart the loop */ | |
162 | continue; | |
163 | } | |
164 | ||
165 | /* Other possible command : connect N (number of retries) */ | |
166 | ||
167 | /* No command matched -> Failed... */ | |
168 | DABORT(1, -EINVAL, CTRL_ERROR, "Not a recognised IrNET command.\n"); | |
169 | } | |
170 | ||
171 | /* Success : we have parsed all commands successfully */ | |
a02cec21 | 172 | return count; |
1da177e4 LT |
173 | } |
174 | ||
175 | #ifdef INITIAL_DISCOVERY | |
176 | /*------------------------------------------------------------------*/ | |
177 | /* | |
178 | * Function irnet_get_discovery_log (self) | |
179 | * | |
180 | * Query the content on the discovery log if not done | |
181 | * | |
182 | * This function query the current content of the discovery log | |
183 | * at the startup of the event channel and save it in the internal struct. | |
184 | */ | |
185 | static void | |
186 | irnet_get_discovery_log(irnet_socket * ap) | |
187 | { | |
188 | __u16 mask = irlmp_service_to_hint(S_LAN); | |
189 | ||
190 | /* Ask IrLMP for the current discovery log */ | |
191 | ap->discoveries = irlmp_get_discoveries(&ap->disco_number, mask, | |
192 | DISCOVERY_DEFAULT_SLOTS); | |
193 | ||
194 | /* Check if the we got some results */ | |
195 | if(ap->discoveries == NULL) | |
196 | ap->disco_number = -1; | |
197 | ||
198 | DEBUG(CTRL_INFO, "Got the log (0x%p), size is %d\n", | |
199 | ap->discoveries, ap->disco_number); | |
200 | } | |
201 | ||
202 | /*------------------------------------------------------------------*/ | |
203 | /* | |
204 | * Function irnet_read_discovery_log (self, event) | |
205 | * | |
206 | * Read the content on the discovery log | |
207 | * | |
208 | * This function dump the current content of the discovery log | |
209 | * at the startup of the event channel. | |
210 | * Return 1 if wrote an event on the control channel... | |
211 | * | |
212 | * State of the ap->disco_XXX variables : | |
213 | * Socket creation : discoveries = NULL ; disco_index = 0 ; disco_number = 0 | |
214 | * While reading : discoveries = ptr ; disco_index = X ; disco_number = Y | |
215 | * After reading : discoveries = NULL ; disco_index = Y ; disco_number = -1 | |
216 | */ | |
217 | static inline int | |
4bf613c6 | 218 | irnet_read_discovery_log(irnet_socket *ap, char *event, int buf_size) |
1da177e4 LT |
219 | { |
220 | int done_event = 0; | |
221 | ||
222 | DENTER(CTRL_TRACE, "(ap=0x%p, event=0x%p)\n", | |
223 | ap, event); | |
224 | ||
225 | /* Test if we have some work to do or we have already finished */ | |
226 | if(ap->disco_number == -1) | |
227 | { | |
228 | DEBUG(CTRL_INFO, "Already done\n"); | |
229 | return 0; | |
230 | } | |
231 | ||
232 | /* Test if it's the first time and therefore we need to get the log */ | |
233 | if(ap->discoveries == NULL) | |
234 | irnet_get_discovery_log(ap); | |
235 | ||
236 | /* Check if we have more item to dump */ | |
237 | if(ap->disco_index < ap->disco_number) | |
238 | { | |
239 | /* Write an event */ | |
4bf613c6 DC |
240 | snprintf(event, buf_size, |
241 | "Found %08x (%s) behind %08x {hints %02X-%02X}\n", | |
242 | ap->discoveries[ap->disco_index].daddr, | |
243 | ap->discoveries[ap->disco_index].info, | |
244 | ap->discoveries[ap->disco_index].saddr, | |
245 | ap->discoveries[ap->disco_index].hints[0], | |
246 | ap->discoveries[ap->disco_index].hints[1]); | |
1da177e4 LT |
247 | DEBUG(CTRL_INFO, "Writing discovery %d : %s\n", |
248 | ap->disco_index, ap->discoveries[ap->disco_index].info); | |
249 | ||
250 | /* We have an event */ | |
251 | done_event = 1; | |
252 | /* Next discovery */ | |
253 | ap->disco_index++; | |
254 | } | |
255 | ||
256 | /* Check if we have done the last item */ | |
257 | if(ap->disco_index >= ap->disco_number) | |
258 | { | |
259 | /* No more items : remove the log and signal termination */ | |
260 | DEBUG(CTRL_INFO, "Cleaning up log (0x%p)\n", | |
261 | ap->discoveries); | |
262 | if(ap->discoveries != NULL) | |
263 | { | |
264 | /* Cleanup our copy of the discovery log */ | |
265 | kfree(ap->discoveries); | |
266 | ap->discoveries = NULL; | |
267 | } | |
268 | ap->disco_number = -1; | |
269 | } | |
270 | ||
271 | return done_event; | |
272 | } | |
273 | #endif /* INITIAL_DISCOVERY */ | |
274 | ||
275 | /*------------------------------------------------------------------*/ | |
276 | /* | |
277 | * Read is used to get IrNET events | |
278 | */ | |
279 | static inline ssize_t | |
280 | irnet_ctrl_read(irnet_socket * ap, | |
281 | struct file * file, | |
282 | char __user * buf, | |
283 | size_t count) | |
284 | { | |
285 | DECLARE_WAITQUEUE(wait, current); | |
4bf613c6 | 286 | char event[75]; |
1da177e4 LT |
287 | ssize_t ret = 0; |
288 | ||
5b5e0928 | 289 | DENTER(CTRL_TRACE, "(ap=0x%p, count=%zd)\n", ap, count); |
1da177e4 | 290 | |
1da177e4 LT |
291 | #ifdef INITIAL_DISCOVERY |
292 | /* Check if we have read the log */ | |
4bf613c6 | 293 | if (irnet_read_discovery_log(ap, event, sizeof(event))) |
1da177e4 | 294 | { |
4bf613c6 DC |
295 | count = min(strlen(event), count); |
296 | if (copy_to_user(buf, event, count)) | |
1da177e4 LT |
297 | { |
298 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
299 | return -EFAULT; | |
300 | } | |
301 | ||
302 | DEXIT(CTRL_TRACE, "\n"); | |
4bf613c6 | 303 | return count; |
1da177e4 LT |
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); | |
a948f8ce | 309 | set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 LT |
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 | } | |
a948f8ce | 325 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
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 */ | |
5b5e0928 | 332 | DEXIT(CTRL_TRACE, " - ret %zd\n", ret); |
1da177e4 LT |
333 | return ret; |
334 | } | |
335 | ||
336 | /* Which event is it ? */ | |
337 | switch(irnet_events.log[ap->event_index].event) | |
338 | { | |
339 | case IRNET_DISCOVER: | |
4bf613c6 DC |
340 | snprintf(event, sizeof(event), |
341 | "Discovered %08x (%s) behind %08x {hints %02X-%02X}\n", | |
342 | irnet_events.log[ap->event_index].daddr, | |
343 | irnet_events.log[ap->event_index].name, | |
344 | irnet_events.log[ap->event_index].saddr, | |
345 | irnet_events.log[ap->event_index].hints.byte[0], | |
346 | irnet_events.log[ap->event_index].hints.byte[1]); | |
1da177e4 LT |
347 | break; |
348 | case IRNET_EXPIRE: | |
4bf613c6 DC |
349 | snprintf(event, sizeof(event), |
350 | "Expired %08x (%s) behind %08x {hints %02X-%02X}\n", | |
351 | irnet_events.log[ap->event_index].daddr, | |
352 | irnet_events.log[ap->event_index].name, | |
353 | irnet_events.log[ap->event_index].saddr, | |
354 | irnet_events.log[ap->event_index].hints.byte[0], | |
355 | irnet_events.log[ap->event_index].hints.byte[1]); | |
1da177e4 LT |
356 | break; |
357 | case IRNET_CONNECT_TO: | |
4bf613c6 DC |
358 | snprintf(event, sizeof(event), "Connected to %08x (%s) on ppp%d\n", |
359 | irnet_events.log[ap->event_index].daddr, | |
360 | irnet_events.log[ap->event_index].name, | |
361 | irnet_events.log[ap->event_index].unit); | |
1da177e4 LT |
362 | break; |
363 | case IRNET_CONNECT_FROM: | |
4bf613c6 DC |
364 | snprintf(event, sizeof(event), "Connection from %08x (%s) on ppp%d\n", |
365 | irnet_events.log[ap->event_index].daddr, | |
366 | irnet_events.log[ap->event_index].name, | |
367 | irnet_events.log[ap->event_index].unit); | |
1da177e4 LT |
368 | break; |
369 | case IRNET_REQUEST_FROM: | |
4bf613c6 DC |
370 | snprintf(event, sizeof(event), "Request from %08x (%s) behind %08x\n", |
371 | irnet_events.log[ap->event_index].daddr, | |
372 | irnet_events.log[ap->event_index].name, | |
373 | irnet_events.log[ap->event_index].saddr); | |
1da177e4 LT |
374 | break; |
375 | case IRNET_NOANSWER_FROM: | |
4bf613c6 DC |
376 | snprintf(event, sizeof(event), "No-answer from %08x (%s) on ppp%d\n", |
377 | irnet_events.log[ap->event_index].daddr, | |
378 | irnet_events.log[ap->event_index].name, | |
379 | irnet_events.log[ap->event_index].unit); | |
1da177e4 LT |
380 | break; |
381 | case IRNET_BLOCKED_LINK: | |
4bf613c6 DC |
382 | snprintf(event, sizeof(event), "Blocked link with %08x (%s) on ppp%d\n", |
383 | irnet_events.log[ap->event_index].daddr, | |
384 | irnet_events.log[ap->event_index].name, | |
385 | irnet_events.log[ap->event_index].unit); | |
1da177e4 LT |
386 | break; |
387 | case IRNET_DISCONNECT_FROM: | |
4bf613c6 DC |
388 | snprintf(event, sizeof(event), "Disconnection from %08x (%s) on ppp%d\n", |
389 | irnet_events.log[ap->event_index].daddr, | |
390 | irnet_events.log[ap->event_index].name, | |
391 | irnet_events.log[ap->event_index].unit); | |
1da177e4 LT |
392 | break; |
393 | case IRNET_DISCONNECT_TO: | |
4bf613c6 DC |
394 | snprintf(event, sizeof(event), "Disconnected to %08x (%s)\n", |
395 | irnet_events.log[ap->event_index].daddr, | |
396 | irnet_events.log[ap->event_index].name); | |
1da177e4 LT |
397 | break; |
398 | default: | |
4bf613c6 | 399 | snprintf(event, sizeof(event), "Bug\n"); |
1da177e4 LT |
400 | } |
401 | /* Increment our event index */ | |
402 | ap->event_index = (ap->event_index + 1) % IRNET_MAX_EVENTS; | |
403 | ||
404 | DEBUG(CTRL_INFO, "Event is :%s", event); | |
405 | ||
4bf613c6 DC |
406 | count = min(strlen(event), count); |
407 | if (copy_to_user(buf, event, count)) | |
1da177e4 LT |
408 | { |
409 | DERROR(CTRL_ERROR, "Invalid user space pointer.\n"); | |
410 | return -EFAULT; | |
411 | } | |
412 | ||
413 | DEXIT(CTRL_TRACE, "\n"); | |
4bf613c6 | 414 | return count; |
1da177e4 LT |
415 | } |
416 | ||
417 | /*------------------------------------------------------------------*/ | |
418 | /* | |
419 | * Poll : called when someone do a select on /dev/irnet. | |
420 | * Just check if there are new events... | |
421 | */ | |
422 | static inline unsigned int | |
423 | irnet_ctrl_poll(irnet_socket * ap, | |
424 | struct file * file, | |
425 | poll_table * wait) | |
426 | { | |
427 | unsigned int mask; | |
428 | ||
429 | DENTER(CTRL_TRACE, "(ap=0x%p)\n", ap); | |
430 | ||
431 | poll_wait(file, &irnet_events.rwait, wait); | |
432 | mask = POLLOUT | POLLWRNORM; | |
433 | /* If there is unread events */ | |
434 | if(ap->event_index != irnet_events.index) | |
435 | mask |= POLLIN | POLLRDNORM; | |
436 | #ifdef INITIAL_DISCOVERY | |
437 | if(ap->disco_number != -1) | |
438 | { | |
439 | /* Test if it's the first time and therefore we need to get the log */ | |
440 | if(ap->discoveries == NULL) | |
441 | irnet_get_discovery_log(ap); | |
442 | /* Recheck */ | |
443 | if(ap->disco_number != -1) | |
444 | mask |= POLLIN | POLLRDNORM; | |
445 | } | |
446 | #endif /* INITIAL_DISCOVERY */ | |
447 | ||
448 | DEXIT(CTRL_TRACE, " - mask=0x%X\n", mask); | |
449 | return mask; | |
450 | } | |
451 | ||
452 | ||
453 | /*********************** FILESYSTEM CALLBACKS ***********************/ | |
454 | /* | |
455 | * Implement the usual open, read, write functions that will be called | |
456 | * by the file system when some action is performed on /dev/irnet. | |
457 | * Most of those actions will in fact be performed by "pppd" or | |
458 | * the control channel, we just act as a redirector... | |
459 | */ | |
460 | ||
461 | /*------------------------------------------------------------------*/ | |
462 | /* | |
463 | * Open : when somebody open /dev/irnet | |
464 | * We basically create a new instance of irnet and initialise it. | |
465 | */ | |
466 | static int | |
467 | dev_irnet_open(struct inode * inode, | |
468 | struct file * file) | |
469 | { | |
470 | struct irnet_socket * ap; | |
471 | int err; | |
472 | ||
473 | DENTER(FS_TRACE, "(file=0x%p)\n", file); | |
474 | ||
475 | #ifdef SECURE_DEVIRNET | |
476 | /* This could (should?) be enforced by the permissions on /dev/irnet. */ | |
477 | if(!capable(CAP_NET_ADMIN)) | |
478 | return -EPERM; | |
479 | #endif /* SECURE_DEVIRNET */ | |
480 | ||
481 | /* Allocate a private structure for this IrNET instance */ | |
0da974f4 | 482 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
1da177e4 LT |
483 | DABORT(ap == NULL, -ENOMEM, FS_ERROR, "Can't allocate struct irnet...\n"); |
484 | ||
485 | /* initialize the irnet structure */ | |
1da177e4 LT |
486 | ap->file = file; |
487 | ||
488 | /* PPP channel setup */ | |
489 | ap->ppp_open = 0; | |
490 | ap->chan.private = ap; | |
491 | ap->chan.ops = &irnet_ppp_ops; | |
492 | ap->chan.mtu = (2048 - TTP_MAX_HEADER - 2 - PPP_HDRLEN); | |
493 | ap->chan.hdrlen = 2 + TTP_MAX_HEADER; /* for A/C + Max IrDA hdr */ | |
494 | /* PPP parameters */ | |
495 | ap->mru = (2048 - TTP_MAX_HEADER - 2 - PPP_HDRLEN); | |
496 | ap->xaccm[0] = ~0U; | |
497 | ap->xaccm[3] = 0x60000000U; | |
498 | ap->raccm = ~0U; | |
499 | ||
500 | /* Setup the IrDA part... */ | |
501 | err = irda_irnet_create(ap); | |
502 | if(err) | |
503 | { | |
504 | DERROR(FS_ERROR, "Can't setup IrDA link...\n"); | |
505 | kfree(ap); | |
f8cba16c | 506 | |
1da177e4 LT |
507 | return err; |
508 | } | |
509 | ||
510 | /* For the control channel */ | |
511 | ap->event_index = irnet_events.index; /* Cancel all past events */ | |
512 | ||
f8cba16c SO |
513 | mutex_init(&ap->lock); |
514 | ||
1da177e4 LT |
515 | /* Put our stuff where we will be able to find it later */ |
516 | file->private_data = ap; | |
517 | ||
518 | DEXIT(FS_TRACE, " - ap=0x%p\n", ap); | |
f8cba16c | 519 | |
1da177e4 LT |
520 | return 0; |
521 | } | |
522 | ||
523 | ||
524 | /*------------------------------------------------------------------*/ | |
525 | /* | |
526 | * Close : when somebody close /dev/irnet | |
527 | * Destroy the instance of /dev/irnet | |
528 | */ | |
529 | static int | |
530 | dev_irnet_close(struct inode * inode, | |
531 | struct file * file) | |
532 | { | |
55a40e24 | 533 | irnet_socket * ap = file->private_data; |
1da177e4 LT |
534 | |
535 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p)\n", | |
536 | file, ap); | |
537 | DABORT(ap == NULL, 0, FS_ERROR, "ap is NULL !!!\n"); | |
538 | ||
539 | /* Detach ourselves */ | |
540 | file->private_data = NULL; | |
541 | ||
542 | /* Close IrDA stuff */ | |
543 | irda_irnet_destroy(ap); | |
544 | ||
545 | /* Disconnect from the generic PPP layer if not already done */ | |
546 | if(ap->ppp_open) | |
547 | { | |
548 | DERROR(FS_ERROR, "Channel still registered - deregistering !\n"); | |
549 | ap->ppp_open = 0; | |
550 | ppp_unregister_channel(&ap->chan); | |
551 | } | |
552 | ||
553 | kfree(ap); | |
554 | ||
555 | DEXIT(FS_TRACE, "\n"); | |
556 | return 0; | |
557 | } | |
558 | ||
559 | /*------------------------------------------------------------------*/ | |
560 | /* | |
561 | * Write does nothing. | |
562 | * (we receive packet from ppp_generic through ppp_irnet_send()) | |
563 | */ | |
564 | static ssize_t | |
565 | dev_irnet_write(struct file * file, | |
566 | const char __user *buf, | |
567 | size_t count, | |
568 | loff_t * ppos) | |
569 | { | |
55a40e24 | 570 | irnet_socket * ap = file->private_data; |
1da177e4 | 571 | |
5b5e0928 | 572 | DPASS(FS_TRACE, "(file=0x%p, ap=0x%p, count=%zd)\n", |
1da177e4 LT |
573 | file, ap, count); |
574 | DABORT(ap == NULL, -ENXIO, FS_ERROR, "ap is NULL !!!\n"); | |
575 | ||
576 | /* If we are connected to ppp_generic, let it handle the job */ | |
577 | if(ap->ppp_open) | |
578 | return -EAGAIN; | |
579 | else | |
580 | return irnet_ctrl_write(ap, buf, count); | |
581 | } | |
582 | ||
583 | /*------------------------------------------------------------------*/ | |
584 | /* | |
585 | * Read doesn't do much either. | |
586 | * (pppd poll us, but ultimately reads through /dev/ppp) | |
587 | */ | |
588 | static ssize_t | |
589 | dev_irnet_read(struct file * file, | |
590 | char __user * buf, | |
591 | size_t count, | |
592 | loff_t * ppos) | |
593 | { | |
55a40e24 | 594 | irnet_socket * ap = file->private_data; |
1da177e4 | 595 | |
5b5e0928 | 596 | DPASS(FS_TRACE, "(file=0x%p, ap=0x%p, count=%zd)\n", |
1da177e4 LT |
597 | file, ap, count); |
598 | DABORT(ap == NULL, -ENXIO, FS_ERROR, "ap is NULL !!!\n"); | |
599 | ||
600 | /* If we are connected to ppp_generic, let it handle the job */ | |
601 | if(ap->ppp_open) | |
602 | return -EAGAIN; | |
603 | else | |
604 | return irnet_ctrl_read(ap, file, buf, count); | |
605 | } | |
606 | ||
607 | /*------------------------------------------------------------------*/ | |
608 | /* | |
609 | * Poll : called when someone do a select on /dev/irnet | |
610 | */ | |
611 | static unsigned int | |
612 | dev_irnet_poll(struct file * file, | |
613 | poll_table * wait) | |
614 | { | |
55a40e24 | 615 | irnet_socket * ap = file->private_data; |
1da177e4 LT |
616 | unsigned int mask; |
617 | ||
618 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p)\n", | |
619 | file, ap); | |
620 | ||
621 | mask = POLLOUT | POLLWRNORM; | |
622 | DABORT(ap == NULL, mask, FS_ERROR, "ap is NULL !!!\n"); | |
623 | ||
624 | /* If we are connected to ppp_generic, let it handle the job */ | |
625 | if(!ap->ppp_open) | |
626 | mask |= irnet_ctrl_poll(ap, file, wait); | |
627 | ||
628 | DEXIT(FS_TRACE, " - mask=0x%X\n", mask); | |
a02cec21 | 629 | return mask; |
1da177e4 LT |
630 | } |
631 | ||
632 | /*------------------------------------------------------------------*/ | |
633 | /* | |
634 | * IOCtl : Called when someone does some ioctls on /dev/irnet | |
635 | * This is the way pppd configure us and control us while the PPP | |
636 | * instance is active. | |
637 | */ | |
54064600 AC |
638 | static long |
639 | dev_irnet_ioctl( | |
1da177e4 LT |
640 | struct file * file, |
641 | unsigned int cmd, | |
642 | unsigned long arg) | |
643 | { | |
55a40e24 | 644 | irnet_socket * ap = file->private_data; |
1da177e4 LT |
645 | int err; |
646 | int val; | |
647 | void __user *argp = (void __user *)arg; | |
648 | ||
649 | DENTER(FS_TRACE, "(file=0x%p, ap=0x%p, cmd=0x%X)\n", | |
650 | file, ap, cmd); | |
651 | ||
652 | /* Basic checks... */ | |
653 | DASSERT(ap != NULL, -ENXIO, PPP_ERROR, "ap is NULL...\n"); | |
654 | #ifdef SECURE_DEVIRNET | |
655 | if(!capable(CAP_NET_ADMIN)) | |
656 | return -EPERM; | |
657 | #endif /* SECURE_DEVIRNET */ | |
658 | ||
659 | err = -EFAULT; | |
660 | switch(cmd) | |
661 | { | |
662 | /* Set discipline (should be N_SYNC_PPP or N_TTY) */ | |
663 | case TIOCSETD: | |
664 | if(get_user(val, (int __user *)argp)) | |
665 | break; | |
666 | if((val == N_SYNC_PPP) || (val == N_PPP)) | |
667 | { | |
668 | DEBUG(FS_INFO, "Entering PPP discipline.\n"); | |
b42e1796 | 669 | /* PPP channel setup (ap->chan in configured in dev_irnet_open())*/ |
f8cba16c SO |
670 | if (mutex_lock_interruptible(&ap->lock)) |
671 | return -EINTR; | |
672 | ||
1da177e4 LT |
673 | err = ppp_register_channel(&ap->chan); |
674 | if(err == 0) | |
675 | { | |
676 | /* Our ppp side is active */ | |
677 | ap->ppp_open = 1; | |
678 | ||
679 | DEBUG(FS_INFO, "Trying to establish a connection.\n"); | |
680 | /* Setup the IrDA link now - may fail... */ | |
681 | irda_irnet_connect(ap); | |
682 | } | |
683 | else | |
684 | DERROR(FS_ERROR, "Can't setup PPP channel...\n"); | |
f8cba16c SO |
685 | |
686 | mutex_unlock(&ap->lock); | |
1da177e4 LT |
687 | } |
688 | else | |
689 | { | |
690 | /* In theory, should be N_TTY */ | |
691 | DEBUG(FS_INFO, "Exiting PPP discipline.\n"); | |
692 | /* Disconnect from the generic PPP layer */ | |
f8cba16c SO |
693 | if (mutex_lock_interruptible(&ap->lock)) |
694 | return -EINTR; | |
695 | ||
1da177e4 LT |
696 | if(ap->ppp_open) |
697 | { | |
698 | ap->ppp_open = 0; | |
699 | ppp_unregister_channel(&ap->chan); | |
700 | } | |
701 | else | |
702 | DERROR(FS_ERROR, "Channel not registered !\n"); | |
703 | err = 0; | |
f8cba16c SO |
704 | |
705 | mutex_unlock(&ap->lock); | |
1da177e4 LT |
706 | } |
707 | break; | |
708 | ||
709 | /* Query PPP channel and unit number */ | |
710 | case PPPIOCGCHAN: | |
f8cba16c SO |
711 | if (mutex_lock_interruptible(&ap->lock)) |
712 | return -EINTR; | |
713 | ||
54064600 AC |
714 | if(ap->ppp_open && !put_user(ppp_channel_index(&ap->chan), |
715 | (int __user *)argp)) | |
716 | err = 0; | |
f8cba16c SO |
717 | |
718 | mutex_unlock(&ap->lock); | |
1da177e4 LT |
719 | break; |
720 | case PPPIOCGUNIT: | |
f8cba16c SO |
721 | if (mutex_lock_interruptible(&ap->lock)) |
722 | return -EINTR; | |
723 | ||
54064600 AC |
724 | if(ap->ppp_open && !put_user(ppp_unit_number(&ap->chan), |
725 | (int __user *)argp)) | |
454debe4 | 726 | err = 0; |
f8cba16c SO |
727 | |
728 | mutex_unlock(&ap->lock); | |
1da177e4 LT |
729 | break; |
730 | ||
731 | /* All these ioctls can be passed both directly and from ppp_generic, | |
732 | * so we just deal with them in one place... | |
733 | */ | |
734 | case PPPIOCGFLAGS: | |
735 | case PPPIOCSFLAGS: | |
736 | case PPPIOCGASYNCMAP: | |
737 | case PPPIOCSASYNCMAP: | |
738 | case PPPIOCGRASYNCMAP: | |
739 | case PPPIOCSRASYNCMAP: | |
740 | case PPPIOCGXASYNCMAP: | |
741 | case PPPIOCSXASYNCMAP: | |
742 | case PPPIOCGMRU: | |
743 | case PPPIOCSMRU: | |
744 | DEBUG(FS_INFO, "Standard PPP ioctl.\n"); | |
745 | if(!capable(CAP_NET_ADMIN)) | |
746 | err = -EPERM; | |
54064600 | 747 | else { |
f8cba16c SO |
748 | if (mutex_lock_interruptible(&ap->lock)) |
749 | return -EINTR; | |
750 | ||
1da177e4 | 751 | err = ppp_irnet_ioctl(&ap->chan, cmd, arg); |
f8cba16c SO |
752 | |
753 | mutex_unlock(&ap->lock); | |
54064600 | 754 | } |
1da177e4 LT |
755 | break; |
756 | ||
757 | /* TTY IOCTLs : Pretend that we are a tty, to keep pppd happy */ | |
758 | /* Get termios */ | |
759 | case TCGETS: | |
760 | DEBUG(FS_INFO, "Get termios.\n"); | |
f8cba16c SO |
761 | if (mutex_lock_interruptible(&ap->lock)) |
762 | return -EINTR; | |
763 | ||
49259d34 | 764 | #ifndef TCGETS2 |
54064600 AC |
765 | if(!kernel_termios_to_user_termios((struct termios __user *)argp, &ap->termios)) |
766 | err = 0; | |
49259d34 DM |
767 | #else |
768 | if(kernel_termios_to_user_termios_1((struct termios __user *)argp, &ap->termios)) | |
54064600 | 769 | err = 0; |
49259d34 | 770 | #endif |
f8cba16c SO |
771 | |
772 | mutex_unlock(&ap->lock); | |
1da177e4 LT |
773 | break; |
774 | /* Set termios */ | |
775 | case TCSETSF: | |
776 | DEBUG(FS_INFO, "Set termios.\n"); | |
f8cba16c SO |
777 | if (mutex_lock_interruptible(&ap->lock)) |
778 | return -EINTR; | |
779 | ||
49259d34 | 780 | #ifndef TCGETS2 |
54064600 AC |
781 | if(!user_termios_to_kernel_termios(&ap->termios, (struct termios __user *)argp)) |
782 | err = 0; | |
49259d34 | 783 | #else |
54064600 AC |
784 | if(!user_termios_to_kernel_termios_1(&ap->termios, (struct termios __user *)argp)) |
785 | err = 0; | |
49259d34 | 786 | #endif |
f8cba16c SO |
787 | |
788 | mutex_unlock(&ap->lock); | |
1da177e4 LT |
789 | break; |
790 | ||
791 | /* Set DTR/RTS */ | |
6819bc2e | 792 | case TIOCMBIS: |
1da177e4 LT |
793 | case TIOCMBIC: |
794 | /* Set exclusive/non-exclusive mode */ | |
795 | case TIOCEXCL: | |
796 | case TIOCNXCL: | |
797 | DEBUG(FS_INFO, "TTY compatibility.\n"); | |
798 | err = 0; | |
799 | break; | |
800 | ||
801 | case TCGETA: | |
802 | DEBUG(FS_INFO, "TCGETA\n"); | |
803 | break; | |
804 | ||
805 | case TCFLSH: | |
806 | DEBUG(FS_INFO, "TCFLSH\n"); | |
807 | /* Note : this will flush buffers in PPP, so it *must* be done | |
808 | * We should also worry that we don't accept junk here and that | |
809 | * we get rid of our own buffers */ | |
810 | #ifdef FLUSH_TO_PPP | |
f8cba16c SO |
811 | if (mutex_lock_interruptible(&ap->lock)) |
812 | return -EINTR; | |
1da177e4 | 813 | ppp_output_wakeup(&ap->chan); |
f8cba16c | 814 | mutex_unlock(&ap->lock); |
1da177e4 LT |
815 | #endif /* FLUSH_TO_PPP */ |
816 | err = 0; | |
817 | break; | |
818 | ||
819 | case FIONREAD: | |
820 | DEBUG(FS_INFO, "FIONREAD\n"); | |
821 | val = 0; | |
822 | if(put_user(val, (int __user *)argp)) | |
823 | break; | |
824 | err = 0; | |
825 | break; | |
826 | ||
827 | default: | |
828 | DERROR(FS_ERROR, "Unsupported ioctl (0x%X)\n", cmd); | |
54064600 | 829 | err = -ENOTTY; |
1da177e4 LT |
830 | } |
831 | ||
832 | DEXIT(FS_TRACE, " - err = 0x%X\n", err); | |
833 | return err; | |
834 | } | |
835 | ||
836 | /************************** PPP CALLBACKS **************************/ | |
837 | /* | |
838 | * This are the functions that the generic PPP driver in the kernel | |
839 | * will call to communicate to us. | |
840 | */ | |
841 | ||
842 | /*------------------------------------------------------------------*/ | |
843 | /* | |
844 | * Prepare the ppp frame for transmission over the IrDA socket. | |
845 | * We make sure that the header space is enough, and we change ppp header | |
846 | * according to flags passed by pppd. | |
847 | * This is not a callback, but just a helper function used in ppp_irnet_send() | |
848 | */ | |
849 | static inline struct sk_buff * | |
850 | irnet_prepare_skb(irnet_socket * ap, | |
851 | struct sk_buff * skb) | |
852 | { | |
853 | unsigned char * data; | |
854 | int proto; /* PPP protocol */ | |
855 | int islcp; /* Protocol == LCP */ | |
856 | int needaddr; /* Need PPP address */ | |
857 | ||
858 | DENTER(PPP_TRACE, "(ap=0x%p, skb=0x%p)\n", | |
859 | ap, skb); | |
860 | ||
861 | /* Extract PPP protocol from the frame */ | |
862 | data = skb->data; | |
863 | proto = (data[0] << 8) + data[1]; | |
864 | ||
865 | /* LCP packets with codes between 1 (configure-request) | |
866 | * and 7 (code-reject) must be sent as though no options | |
867 | * have been negotiated. */ | |
868 | islcp = (proto == PPP_LCP) && (1 <= data[2]) && (data[2] <= 7); | |
869 | ||
870 | /* compress protocol field if option enabled */ | |
871 | if((data[0] == 0) && (ap->flags & SC_COMP_PROT) && (!islcp)) | |
872 | skb_pull(skb,1); | |
873 | ||
874 | /* Check if we need address/control fields */ | |
875 | needaddr = 2*((ap->flags & SC_COMP_AC) == 0 || islcp); | |
876 | ||
877 | /* Is the skb headroom large enough to contain all IrDA-headers? */ | |
878 | if((skb_headroom(skb) < (ap->max_header_size + needaddr)) || | |
879 | (skb_shared(skb))) | |
880 | { | |
881 | struct sk_buff * new_skb; | |
882 | ||
883 | DEBUG(PPP_INFO, "Reallocating skb\n"); | |
884 | ||
885 | /* Create a new skb */ | |
886 | new_skb = skb_realloc_headroom(skb, ap->max_header_size + needaddr); | |
887 | ||
888 | /* We have to free the original skb anyway */ | |
889 | dev_kfree_skb(skb); | |
890 | ||
891 | /* Did the realloc succeed ? */ | |
892 | DABORT(new_skb == NULL, NULL, PPP_ERROR, "Could not realloc skb\n"); | |
893 | ||
894 | /* Use the new skb instead */ | |
895 | skb = new_skb; | |
896 | } | |
897 | ||
898 | /* prepend address/control fields if necessary */ | |
899 | if(needaddr) | |
900 | { | |
901 | skb_push(skb, 2); | |
902 | skb->data[0] = PPP_ALLSTATIONS; | |
903 | skb->data[1] = PPP_UI; | |
904 | } | |
905 | ||
906 | DEXIT(PPP_TRACE, "\n"); | |
907 | ||
908 | return skb; | |
909 | } | |
910 | ||
911 | /*------------------------------------------------------------------*/ | |
912 | /* | |
913 | * Send a packet to the peer over the IrTTP connection. | |
914 | * Returns 1 iff the packet was accepted. | |
915 | * Returns 0 iff packet was not consumed. | |
916 | * If the packet was not accepted, we will call ppp_output_wakeup | |
917 | * at some later time to reactivate flow control in ppp_generic. | |
918 | */ | |
919 | static int | |
920 | ppp_irnet_send(struct ppp_channel * chan, | |
921 | struct sk_buff * skb) | |
922 | { | |
923 | irnet_socket * self = (struct irnet_socket *) chan->private; | |
924 | int ret; | |
925 | ||
926 | DENTER(PPP_TRACE, "(channel=0x%p, ap/self=0x%p)\n", | |
927 | chan, self); | |
928 | ||
929 | /* Check if things are somewhat valid... */ | |
930 | DASSERT(self != NULL, 0, PPP_ERROR, "Self is NULL !!!\n"); | |
931 | ||
932 | /* Check if we are connected */ | |
933 | if(!(test_bit(0, &self->ttp_open))) | |
934 | { | |
935 | #ifdef CONNECT_IN_SEND | |
936 | /* Let's try to connect one more time... */ | |
937 | /* Note : we won't be connected after this call, but we should be | |
938 | * ready for next packet... */ | |
939 | /* If we are already connecting, this will fail */ | |
940 | irda_irnet_connect(self); | |
941 | #endif /* CONNECT_IN_SEND */ | |
942 | ||
943 | DEBUG(PPP_INFO, "IrTTP not ready ! (%ld-%ld)\n", | |
944 | self->ttp_open, self->ttp_connect); | |
945 | ||
946 | /* Note : we can either drop the packet or block the packet. | |
947 | * | |
948 | * Blocking the packet allow us a better connection time, | |
949 | * because by calling ppp_output_wakeup() we can have | |
950 | * ppp_generic resending the LCP request immediately to us, | |
951 | * rather than waiting for one of pppd periodic transmission of | |
952 | * LCP request. | |
953 | * | |
954 | * On the other hand, if we block all packet, all those periodic | |
955 | * transmissions of pppd accumulate in ppp_generic, creating a | |
956 | * backlog of LCP request. When we eventually connect later on, | |
957 | * we have to transmit all this backlog before we can connect | |
958 | * proper (if we don't timeout before). | |
959 | * | |
960 | * The current strategy is as follow : | |
961 | * While we are attempting to connect, we block packets to get | |
962 | * a better connection time. | |
963 | * If we fail to connect, we drain the queue and start dropping packets | |
964 | */ | |
965 | #ifdef BLOCK_WHEN_CONNECT | |
966 | /* If we are attempting to connect */ | |
967 | if(test_bit(0, &self->ttp_connect)) | |
968 | { | |
969 | /* Blocking packet, ppp_generic will retry later */ | |
970 | return 0; | |
971 | } | |
972 | #endif /* BLOCK_WHEN_CONNECT */ | |
973 | ||
974 | /* Dropping packet, pppd will retry later */ | |
975 | dev_kfree_skb(skb); | |
976 | return 1; | |
977 | } | |
978 | ||
979 | /* Check if the queue can accept any packet, otherwise block */ | |
980 | if(self->tx_flow != FLOW_START) | |
981 | DRETURN(0, PPP_INFO, "IrTTP queue full (%d skbs)...\n", | |
982 | skb_queue_len(&self->tsap->tx_queue)); | |
983 | ||
984 | /* Prepare ppp frame for transmission */ | |
985 | skb = irnet_prepare_skb(self, skb); | |
986 | DABORT(skb == NULL, 1, PPP_ERROR, "Prepare skb for Tx failed.\n"); | |
987 | ||
988 | /* Send the packet to IrTTP */ | |
989 | ret = irttp_data_request(self->tsap, skb); | |
990 | if(ret < 0) | |
991 | { | |
6819bc2e | 992 | /* |
1da177e4 LT |
993 | * > IrTTPs tx queue is full, so we just have to |
994 | * > drop the frame! You might think that we should | |
995 | * > just return -1 and don't deallocate the frame, | |
996 | * > but that is dangerous since it's possible that | |
997 | * > we have replaced the original skb with a new | |
998 | * > one with larger headroom, and that would really | |
999 | * > confuse do_dev_queue_xmit() in dev.c! I have | |
6819bc2e | 1000 | * > tried :-) DB |
1da177e4 LT |
1001 | * Correction : we verify the flow control above (self->tx_flow), |
1002 | * so we come here only if IrTTP doesn't like the packet (empty, | |
1003 | * too large, IrTTP not connected). In those rare cases, it's ok | |
1004 | * to drop it, we don't want to see it here again... | |
1005 | * Jean II | |
1006 | */ | |
1007 | DERROR(PPP_ERROR, "IrTTP doesn't like this packet !!! (0x%X)\n", ret); | |
1008 | /* irttp_data_request already free the packet */ | |
1009 | } | |
1010 | ||
1011 | DEXIT(PPP_TRACE, "\n"); | |
1012 | return 1; /* Packet has been consumed */ | |
1013 | } | |
1014 | ||
1015 | /*------------------------------------------------------------------*/ | |
1016 | /* | |
1017 | * Take care of the ioctls that ppp_generic doesn't want to deal with... | |
1018 | * Note : we are also called from dev_irnet_ioctl(). | |
1019 | */ | |
1020 | static int | |
1021 | ppp_irnet_ioctl(struct ppp_channel * chan, | |
1022 | unsigned int cmd, | |
1023 | unsigned long arg) | |
1024 | { | |
1025 | irnet_socket * ap = (struct irnet_socket *) chan->private; | |
1026 | int err; | |
1027 | int val; | |
1028 | u32 accm[8]; | |
1029 | void __user *argp = (void __user *)arg; | |
1030 | ||
1031 | DENTER(PPP_TRACE, "(channel=0x%p, ap=0x%p, cmd=0x%X)\n", | |
1032 | chan, ap, cmd); | |
1033 | ||
1034 | /* Basic checks... */ | |
1035 | DASSERT(ap != NULL, -ENXIO, PPP_ERROR, "ap is NULL...\n"); | |
1036 | ||
1037 | err = -EFAULT; | |
1038 | switch(cmd) | |
1039 | { | |
1040 | /* PPP flags */ | |
1041 | case PPPIOCGFLAGS: | |
1042 | val = ap->flags | ap->rbits; | |
1043 | if(put_user(val, (int __user *) argp)) | |
1044 | break; | |
1045 | err = 0; | |
1046 | break; | |
1047 | case PPPIOCSFLAGS: | |
1048 | if(get_user(val, (int __user *) argp)) | |
1049 | break; | |
1050 | ap->flags = val & ~SC_RCV_BITS; | |
1051 | ap->rbits = val & SC_RCV_BITS; | |
1052 | err = 0; | |
1053 | break; | |
1054 | ||
1055 | /* Async map stuff - all dummy to please pppd */ | |
1056 | case PPPIOCGASYNCMAP: | |
1057 | if(put_user(ap->xaccm[0], (u32 __user *) argp)) | |
1058 | break; | |
1059 | err = 0; | |
1060 | break; | |
1061 | case PPPIOCSASYNCMAP: | |
1062 | if(get_user(ap->xaccm[0], (u32 __user *) argp)) | |
1063 | break; | |
1064 | err = 0; | |
1065 | break; | |
1066 | case PPPIOCGRASYNCMAP: | |
1067 | if(put_user(ap->raccm, (u32 __user *) argp)) | |
1068 | break; | |
1069 | err = 0; | |
1070 | break; | |
1071 | case PPPIOCSRASYNCMAP: | |
1072 | if(get_user(ap->raccm, (u32 __user *) argp)) | |
1073 | break; | |
1074 | err = 0; | |
1075 | break; | |
1076 | case PPPIOCGXASYNCMAP: | |
1077 | if(copy_to_user(argp, ap->xaccm, sizeof(ap->xaccm))) | |
1078 | break; | |
1079 | err = 0; | |
1080 | break; | |
1081 | case PPPIOCSXASYNCMAP: | |
1082 | if(copy_from_user(accm, argp, sizeof(accm))) | |
1083 | break; | |
1084 | accm[2] &= ~0x40000000U; /* can't escape 0x5e */ | |
1085 | accm[3] |= 0x60000000U; /* must escape 0x7d, 0x7e */ | |
1086 | memcpy(ap->xaccm, accm, sizeof(ap->xaccm)); | |
1087 | err = 0; | |
1088 | break; | |
1089 | ||
1090 | /* Max PPP frame size */ | |
1091 | case PPPIOCGMRU: | |
1092 | if(put_user(ap->mru, (int __user *) argp)) | |
1093 | break; | |
1094 | err = 0; | |
1095 | break; | |
1096 | case PPPIOCSMRU: | |
1097 | if(get_user(val, (int __user *) argp)) | |
1098 | break; | |
1099 | if(val < PPP_MRU) | |
1100 | val = PPP_MRU; | |
1101 | ap->mru = val; | |
1102 | err = 0; | |
1103 | break; | |
1104 | ||
1105 | default: | |
1106 | DEBUG(PPP_INFO, "Unsupported ioctl (0x%X)\n", cmd); | |
1107 | err = -ENOIOCTLCMD; | |
1108 | } | |
1109 | ||
1110 | DEXIT(PPP_TRACE, " - err = 0x%X\n", err); | |
1111 | return err; | |
1112 | } | |
1113 | ||
1114 | /************************** INITIALISATION **************************/ | |
1115 | /* | |
1116 | * Module initialisation and all that jazz... | |
1117 | */ | |
1118 | ||
1119 | /*------------------------------------------------------------------*/ | |
1120 | /* | |
1121 | * Hook our device callbacks in the filesystem, to connect our code | |
1122 | * to /dev/irnet | |
1123 | */ | |
1124 | static inline int __init | |
1125 | ppp_irnet_init(void) | |
1126 | { | |
1127 | int err = 0; | |
1128 | ||
1129 | DENTER(MODULE_TRACE, "()\n"); | |
1130 | ||
1131 | /* Allocate ourselves as a minor in the misc range */ | |
1132 | err = misc_register(&irnet_misc_device); | |
1133 | ||
1134 | DEXIT(MODULE_TRACE, "\n"); | |
1135 | return err; | |
1136 | } | |
1137 | ||
1138 | /*------------------------------------------------------------------*/ | |
1139 | /* | |
1140 | * Cleanup at exit... | |
1141 | */ | |
1142 | static inline void __exit | |
1143 | ppp_irnet_cleanup(void) | |
1144 | { | |
1145 | DENTER(MODULE_TRACE, "()\n"); | |
1146 | ||
1147 | /* De-allocate /dev/irnet minor in misc range */ | |
1148 | misc_deregister(&irnet_misc_device); | |
1149 | ||
1150 | DEXIT(MODULE_TRACE, "\n"); | |
1151 | } | |
1152 | ||
1153 | /*------------------------------------------------------------------*/ | |
1154 | /* | |
1155 | * Module main entry point | |
1156 | */ | |
bf73d1c5 | 1157 | static int __init |
1da177e4 LT |
1158 | irnet_init(void) |
1159 | { | |
1160 | int err; | |
1161 | ||
1162 | /* Initialise both parts... */ | |
1163 | err = irda_irnet_init(); | |
1164 | if(!err) | |
1165 | err = ppp_irnet_init(); | |
1166 | return err; | |
1167 | } | |
1168 | ||
1169 | /*------------------------------------------------------------------*/ | |
1170 | /* | |
1171 | * Module exit | |
1172 | */ | |
1173 | static void __exit | |
1174 | irnet_cleanup(void) | |
1175 | { | |
1176 | irda_irnet_cleanup(); | |
1177 | ppp_irnet_cleanup(); | |
1178 | } | |
1179 | ||
1180 | /*------------------------------------------------------------------*/ | |
1181 | /* | |
1182 | * Module magic | |
1183 | */ | |
1184 | module_init(irnet_init); | |
1185 | module_exit(irnet_cleanup); | |
1186 | MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>"); | |
6819bc2e | 1187 | MODULE_DESCRIPTION("IrNET : Synchronous PPP over IrDA"); |
1da177e4 LT |
1188 | MODULE_LICENSE("GPL"); |
1189 | MODULE_ALIAS_CHARDEV(10, 187); |