Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /***************************************************************************** |
2 | * wanmain.c WAN Multiprotocol Router Module. Main code. | |
3 | * | |
4 | * This module is completely hardware-independent and provides | |
5 | * the following common services for the WAN Link Drivers: | |
0779bf2d | 6 | * o WAN device management (registering, unregistering) |
1da177e4 LT |
7 | * o Network interface management |
8 | * o Physical connection management (dial-up, incoming calls) | |
9 | * o Logical connection management (switched virtual circuits) | |
10 | * o Protocol encapsulation/decapsulation | |
11 | * | |
12 | * Author: Gideon Hack | |
13 | * | |
14 | * Copyright: (c) 1995-1999 Sangoma Technologies Inc. | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or | |
17 | * modify it under the terms of the GNU General Public License | |
18 | * as published by the Free Software Foundation; either version | |
19 | * 2 of the License, or (at your option) any later version. | |
20 | * ============================================================================ | |
21 | * Nov 24, 2000 Nenad Corbic Updated for 2.4.X kernels | |
22 | * Nov 07, 2000 Nenad Corbic Fixed the Mulit-Port PPP for kernels 2.2.16 and | |
23 | * greater. | |
24 | * Aug 2, 2000 Nenad Corbic Block the Multi-Port PPP from running on | |
25 | * kernels 2.2.16 or greater. The SyncPPP | |
26 | * has changed. | |
27 | * Jul 13, 2000 Nenad Corbic Added SyncPPP support | |
28 | * Added extra debugging in device_setup(). | |
29 | * Oct 01, 1999 Gideon Hack Update for s514 PCI card | |
30 | * Dec 27, 1996 Gene Kozin Initial version (based on Sangoma's WANPIPE) | |
31 | * Jan 16, 1997 Gene Kozin router_devlist made public | |
32 | * Jan 31, 1997 Alan Cox Hacked it about a bit for 2.1 | |
33 | * Jun 27, 1997 Alan Cox realigned with vendor code | |
34 | * Oct 15, 1997 Farhan Thawar changed wan_encapsulate to add a pad byte of 0 | |
35 | * Apr 20, 1998 Alan Cox Fixed 2.1 symbols | |
36 | * May 17, 1998 K. Baranowski Fixed SNAP encapsulation in wan_encapsulate | |
37 | * Dec 15, 1998 Arnaldo Melo support for firmwares of up to 128000 bytes | |
38 | * check wandev->setup return value | |
39 | * Dec 22, 1998 Arnaldo Melo vmalloc/vfree used in device_setup to allocate | |
40 | * kernel memory and copy configuration data to | |
41 | * kernel space (for big firmwares) | |
42 | * Jun 02, 1999 Gideon Hack Updates for Linux 2.0.X and 2.2.X kernels. | |
43 | *****************************************************************************/ | |
44 | ||
1da177e4 | 45 | #include <linux/stddef.h> /* offsetof(), etc. */ |
4fc268d2 | 46 | #include <linux/capability.h> |
1da177e4 LT |
47 | #include <linux/errno.h> /* return codes */ |
48 | #include <linux/kernel.h> | |
1da177e4 | 49 | #include <linux/module.h> /* support for loadable modules */ |
e49332bd JJ |
50 | #include <linux/slab.h> /* kmalloc(), kfree() */ |
51 | #include <linux/mm.h> | |
1da177e4 LT |
52 | #include <linux/string.h> /* inline mem*, str* functions */ |
53 | ||
54 | #include <asm/byteorder.h> /* htons(), etc. */ | |
55 | #include <linux/wanrouter.h> /* WAN router API definitions */ | |
56 | ||
57 | #include <linux/vmalloc.h> /* vmalloc, vfree */ | |
58 | #include <asm/uaccess.h> /* copy_to/from_user */ | |
59 | #include <linux/init.h> /* __initfunc et al. */ | |
1da177e4 LT |
60 | |
61 | #define KMEM_SAFETYZONE 8 | |
62 | ||
7be6065b WC |
63 | #define DEV_TO_SLAVE(dev) (*((struct net_device **)netdev_priv(dev))) |
64 | ||
1da177e4 LT |
65 | /* |
66 | * Function Prototypes | |
67 | */ | |
68 | ||
69 | /* | |
70 | * WAN device IOCTL handlers | |
71 | */ | |
72 | ||
73 | static int wanrouter_device_setup(struct wan_device *wandev, | |
74 | wandev_conf_t __user *u_conf); | |
75 | static int wanrouter_device_stat(struct wan_device *wandev, | |
76 | wandev_stat_t __user *u_stat); | |
77 | static int wanrouter_device_shutdown(struct wan_device *wandev); | |
78 | static int wanrouter_device_new_if(struct wan_device *wandev, | |
79 | wanif_conf_t __user *u_conf); | |
80 | static int wanrouter_device_del_if(struct wan_device *wandev, | |
81 | char __user *u_name); | |
82 | ||
83 | /* | |
84 | * Miscellaneous | |
85 | */ | |
86 | ||
87 | static struct wan_device *wanrouter_find_device(char *name); | |
88 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name); | |
9ee62630 HE |
89 | static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
90 | __acquires(lock); | |
91 | static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) | |
92 | __releases(lock); | |
1da177e4 LT |
93 | |
94 | ||
95 | ||
96 | /* | |
97 | * Global Data | |
98 | */ | |
99 | ||
100 | static char wanrouter_fullname[] = "Sangoma WANPIPE Router"; | |
101 | static char wanrouter_copyright[] = "(c) 1995-2000 Sangoma Technologies Inc."; | |
102 | static char wanrouter_modname[] = ROUTER_NAME; /* short module name */ | |
103 | struct wan_device* wanrouter_router_devlist; /* list of registered devices */ | |
104 | ||
105 | /* | |
106 | * Organize Unique Identifiers for encapsulation/decapsulation | |
107 | */ | |
108 | ||
1da177e4 | 109 | #if 0 |
97353cb4 | 110 | static unsigned char wanrouter_oui_ether[] = { 0x00, 0x00, 0x00 }; |
1da177e4 LT |
111 | static unsigned char wanrouter_oui_802_2[] = { 0x00, 0x80, 0xC2 }; |
112 | #endif | |
113 | ||
114 | static int __init wanrouter_init(void) | |
115 | { | |
116 | int err; | |
117 | ||
118 | printk(KERN_INFO "%s v%u.%u %s\n", | |
119 | wanrouter_fullname, ROUTER_VERSION, ROUTER_RELEASE, | |
120 | wanrouter_copyright); | |
121 | ||
122 | err = wanrouter_proc_init(); | |
123 | if (err) | |
124 | printk(KERN_INFO "%s: can't create entry in proc filesystem!\n", | |
125 | wanrouter_modname); | |
126 | ||
127 | return err; | |
128 | } | |
129 | ||
130 | static void __exit wanrouter_cleanup (void) | |
131 | { | |
132 | wanrouter_proc_cleanup(); | |
133 | } | |
134 | ||
135 | /* | |
136 | * This is just plain dumb. We should move the bugger to drivers/net/wan, | |
137 | * slap it first in directory and make it module_init(). The only reason | |
138 | * for subsys_initcall() here is that net goes after drivers (why, BTW?) | |
139 | */ | |
140 | subsys_initcall(wanrouter_init); | |
141 | module_exit(wanrouter_cleanup); | |
142 | ||
143 | /* | |
144 | * Kernel APIs | |
145 | */ | |
146 | ||
147 | /* | |
148 | * Register WAN device. | |
149 | * o verify device credentials | |
150 | * o create an entry for the device in the /proc/net/router directory | |
151 | * o initialize internally maintained fields of the wan_device structure | |
152 | * o link device data space to a singly-linked list | |
153 | * o if it's the first device, then start kernel 'thread' | |
154 | * o increment module use count | |
155 | * | |
156 | * Return: | |
157 | * 0 Ok | |
158 | * < 0 error. | |
159 | * | |
160 | * Context: process | |
161 | */ | |
162 | ||
163 | ||
164 | int register_wan_device(struct wan_device *wandev) | |
165 | { | |
166 | int err, namelen; | |
167 | ||
168 | if ((wandev == NULL) || (wandev->magic != ROUTER_MAGIC) || | |
169 | (wandev->name == NULL)) | |
170 | return -EINVAL; | |
171 | ||
172 | namelen = strlen(wandev->name); | |
173 | if (!namelen || (namelen > WAN_DRVNAME_SZ)) | |
174 | return -EINVAL; | |
175 | ||
176 | if (wanrouter_find_device(wandev->name)) | |
177 | return -EEXIST; | |
178 | ||
179 | #ifdef WANDEBUG | |
180 | printk(KERN_INFO "%s: registering WAN device %s\n", | |
181 | wanrouter_modname, wandev->name); | |
182 | #endif | |
183 | ||
184 | /* | |
185 | * Register /proc directory entry | |
186 | */ | |
187 | err = wanrouter_proc_add(wandev); | |
188 | if (err) { | |
189 | printk(KERN_INFO | |
190 | "%s: can't create /proc/net/router/%s entry!\n", | |
191 | wanrouter_modname, wandev->name); | |
192 | return err; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Initialize fields of the wan_device structure maintained by the | |
197 | * router and update local data. | |
198 | */ | |
199 | ||
200 | wandev->ndev = 0; | |
201 | wandev->dev = NULL; | |
202 | wandev->next = wanrouter_router_devlist; | |
203 | wanrouter_router_devlist = wandev; | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Unregister WAN device. | |
209 | * o shut down device | |
210 | * o unlink device data space from the linked list | |
211 | * o delete device entry in the /proc/net/router directory | |
212 | * o decrement module use count | |
213 | * | |
214 | * Return: 0 Ok | |
215 | * <0 error. | |
216 | * Context: process | |
217 | */ | |
218 | ||
219 | ||
220 | int unregister_wan_device(char *name) | |
221 | { | |
222 | struct wan_device *wandev, *prev; | |
223 | ||
224 | if (name == NULL) | |
225 | return -EINVAL; | |
226 | ||
227 | for (wandev = wanrouter_router_devlist, prev = NULL; | |
228 | wandev && strcmp(wandev->name, name); | |
229 | prev = wandev, wandev = wandev->next) | |
230 | ; | |
231 | if (wandev == NULL) | |
232 | return -ENODEV; | |
233 | ||
234 | #ifdef WANDEBUG | |
235 | printk(KERN_INFO "%s: unregistering WAN device %s\n", | |
236 | wanrouter_modname, name); | |
237 | #endif | |
238 | ||
239 | if (wandev->state != WAN_UNCONFIGURED) | |
240 | wanrouter_device_shutdown(wandev); | |
241 | ||
242 | if (prev) | |
243 | prev->next = wandev->next; | |
244 | else | |
245 | wanrouter_router_devlist = wandev->next; | |
246 | ||
247 | wanrouter_proc_delete(wandev); | |
248 | return 0; | |
249 | } | |
250 | ||
97353cb4 AB |
251 | #if 0 |
252 | ||
1da177e4 LT |
253 | /* |
254 | * Encapsulate packet. | |
255 | * | |
256 | * Return: encapsulation header size | |
257 | * < 0 - unsupported Ethertype | |
258 | * | |
259 | * Notes: | |
260 | * 1. This function may be called on interrupt context. | |
261 | */ | |
262 | ||
263 | ||
264 | int wanrouter_encapsulate(struct sk_buff *skb, struct net_device *dev, | |
265 | unsigned short type) | |
266 | { | |
267 | int hdr_len = 0; | |
268 | ||
269 | switch (type) { | |
270 | case ETH_P_IP: /* IP datagram encapsulation */ | |
271 | hdr_len += 1; | |
272 | skb_push(skb, 1); | |
273 | skb->data[0] = NLPID_IP; | |
274 | break; | |
275 | ||
276 | case ETH_P_IPX: /* SNAP encapsulation */ | |
277 | case ETH_P_ARP: | |
278 | hdr_len += 7; | |
279 | skb_push(skb, 7); | |
280 | skb->data[0] = 0; | |
281 | skb->data[1] = NLPID_SNAP; | |
27d7ff46 ACM |
282 | skb_copy_to_linear_data_offset(skb, 2, wanrouter_oui_ether, |
283 | sizeof(wanrouter_oui_ether)); | |
1da177e4 LT |
284 | *((unsigned short*)&skb->data[5]) = htons(type); |
285 | break; | |
286 | ||
287 | default: /* Unknown packet type */ | |
288 | printk(KERN_INFO | |
289 | "%s: unsupported Ethertype 0x%04X on interface %s!\n", | |
290 | wanrouter_modname, type, dev->name); | |
291 | hdr_len = -EINVAL; | |
292 | } | |
293 | return hdr_len; | |
294 | } | |
295 | ||
296 | ||
297 | /* | |
298 | * Decapsulate packet. | |
299 | * | |
300 | * Return: Ethertype (in network order) | |
301 | * 0 unknown encapsulation | |
302 | * | |
303 | * Notes: | |
304 | * 1. This function may be called on interrupt context. | |
305 | */ | |
306 | ||
307 | ||
ab611487 | 308 | __be16 wanrouter_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
309 | { |
310 | int cnt = skb->data[0] ? 0 : 1; /* there may be a pad present */ | |
ab611487 | 311 | __be16 ethertype; |
1da177e4 LT |
312 | |
313 | switch (skb->data[cnt]) { | |
314 | case NLPID_IP: /* IP datagramm */ | |
315 | ethertype = htons(ETH_P_IP); | |
316 | cnt += 1; | |
317 | break; | |
318 | ||
4ba6122b | 319 | case NLPID_SNAP: /* SNAP encapsulation */ |
1da177e4 LT |
320 | if (memcmp(&skb->data[cnt + 1], wanrouter_oui_ether, |
321 | sizeof(wanrouter_oui_ether))){ | |
4ba6122b | 322 | printk(KERN_INFO |
1da177e4 LT |
323 | "%s: unsupported SNAP OUI %02X-%02X-%02X " |
324 | "on interface %s!\n", wanrouter_modname, | |
325 | skb->data[cnt+1], skb->data[cnt+2], | |
326 | skb->data[cnt+3], dev->name); | |
327 | return 0; | |
328 | } | |
ab611487 | 329 | ethertype = *((__be16*)&skb->data[cnt+4]); |
1da177e4 LT |
330 | cnt += 6; |
331 | break; | |
332 | ||
333 | /* add other protocols, e.g. CLNP, ESIS, ISIS, if needed */ | |
334 | ||
335 | default: | |
336 | printk(KERN_INFO | |
337 | "%s: unsupported NLPID 0x%02X on interface %s!\n", | |
338 | wanrouter_modname, skb->data[cnt], dev->name); | |
339 | return 0; | |
340 | } | |
341 | skb->protocol = ethertype; | |
342 | skb->pkt_type = PACKET_HOST; /* Physically point to point */ | |
343 | skb_pull(skb, cnt); | |
459a98ed | 344 | skb_reset_mac_header(skb); |
1da177e4 LT |
345 | return ethertype; |
346 | } | |
347 | ||
97353cb4 | 348 | #endif /* 0 */ |
1da177e4 LT |
349 | |
350 | /* | |
351 | * WAN device IOCTL. | |
352 | * o find WAN device associated with this node | |
353 | * o execute requested action or pass command to the device driver | |
354 | */ | |
355 | ||
866988ed | 356 | long wanrouter_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 | 357 | { |
866988ed | 358 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
359 | int err = 0; |
360 | struct proc_dir_entry *dent; | |
361 | struct wan_device *wandev; | |
362 | void __user *data = (void __user *)arg; | |
363 | ||
364 | if (!capable(CAP_NET_ADMIN)) | |
365 | return -EPERM; | |
366 | ||
367 | if ((cmd >> 8) != ROUTER_IOCTL) | |
368 | return -EINVAL; | |
369 | ||
370 | dent = PDE(inode); | |
371 | if ((dent == NULL) || (dent->data == NULL)) | |
372 | return -EINVAL; | |
373 | ||
374 | wandev = dent->data; | |
375 | if (wandev->magic != ROUTER_MAGIC) | |
376 | return -EINVAL; | |
377 | ||
866988ed | 378 | lock_kernel(); |
1da177e4 LT |
379 | switch (cmd) { |
380 | case ROUTER_SETUP: | |
381 | err = wanrouter_device_setup(wandev, data); | |
382 | break; | |
383 | ||
384 | case ROUTER_DOWN: | |
385 | err = wanrouter_device_shutdown(wandev); | |
386 | break; | |
387 | ||
388 | case ROUTER_STAT: | |
389 | err = wanrouter_device_stat(wandev, data); | |
390 | break; | |
391 | ||
392 | case ROUTER_IFNEW: | |
393 | err = wanrouter_device_new_if(wandev, data); | |
394 | break; | |
395 | ||
396 | case ROUTER_IFDEL: | |
397 | err = wanrouter_device_del_if(wandev, data); | |
398 | break; | |
399 | ||
400 | case ROUTER_IFSTAT: | |
401 | break; | |
402 | ||
403 | default: | |
404 | if ((cmd >= ROUTER_USER) && | |
405 | (cmd <= ROUTER_USER_MAX) && | |
406 | wandev->ioctl) | |
407 | err = wandev->ioctl(wandev, cmd, arg); | |
408 | else err = -EINVAL; | |
409 | } | |
866988ed | 410 | unlock_kernel(); |
1da177e4 LT |
411 | return err; |
412 | } | |
413 | ||
414 | /* | |
415 | * WAN Driver IOCTL Handlers | |
416 | */ | |
417 | ||
418 | /* | |
419 | * Setup WAN link device. | |
420 | * o verify user address space | |
421 | * o allocate kernel memory and copy configuration data to kernel space | |
422 | * o if configuration data includes extension, copy it to kernel space too | |
423 | * o call driver's setup() entry point | |
424 | */ | |
425 | ||
426 | static int wanrouter_device_setup(struct wan_device *wandev, | |
427 | wandev_conf_t __user *u_conf) | |
428 | { | |
429 | void *data = NULL; | |
430 | wandev_conf_t *conf; | |
431 | int err = -EINVAL; | |
432 | ||
433 | if (wandev->setup == NULL) { /* Nothing to do ? */ | |
434 | printk(KERN_INFO "%s: ERROR, No setup script: wandev->setup()\n", | |
435 | wandev->name); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | conf = kmalloc(sizeof(wandev_conf_t), GFP_KERNEL); | |
440 | if (conf == NULL){ | |
441 | printk(KERN_INFO "%s: ERROR, Failed to allocate kernel memory !\n", | |
442 | wandev->name); | |
443 | return -ENOBUFS; | |
444 | } | |
445 | ||
446 | if (copy_from_user(conf, u_conf, sizeof(wandev_conf_t))) { | |
447 | printk(KERN_INFO "%s: Failed to copy user config data to kernel space!\n", | |
448 | wandev->name); | |
449 | kfree(conf); | |
450 | return -EFAULT; | |
451 | } | |
452 | ||
453 | if (conf->magic != ROUTER_MAGIC) { | |
454 | kfree(conf); | |
455 | printk(KERN_INFO "%s: ERROR, Invalid MAGIC Number\n", | |
456 | wandev->name); | |
4ba6122b | 457 | return -EINVAL; |
1da177e4 LT |
458 | } |
459 | ||
460 | if (conf->data_size && conf->data) { | |
75202e76 | 461 | if (conf->data_size > 128000) { |
1da177e4 LT |
462 | printk(KERN_INFO |
463 | "%s: ERROR, Invalid firmware data size %i !\n", | |
464 | wandev->name, conf->data_size); | |
465 | kfree(conf); | |
4ba6122b | 466 | return -EINVAL; |
1da177e4 LT |
467 | } |
468 | ||
469 | data = vmalloc(conf->data_size); | |
470 | if (!data) { | |
471 | printk(KERN_INFO | |
4ba6122b | 472 | "%s: ERROR, Faild allocate kernel memory !\n", |
1da177e4 LT |
473 | wandev->name); |
474 | kfree(conf); | |
475 | return -ENOBUFS; | |
476 | } | |
477 | if (!copy_from_user(data, conf->data, conf->data_size)) { | |
478 | conf->data = data; | |
479 | err = wandev->setup(wandev, conf); | |
480 | } else { | |
481 | printk(KERN_INFO | |
482 | "%s: ERROR, Faild to copy from user data !\n", | |
483 | wandev->name); | |
484 | err = -EFAULT; | |
485 | } | |
486 | vfree(data); | |
487 | } else { | |
488 | printk(KERN_INFO | |
489 | "%s: ERROR, No firmware found ! Firmware size = %i !\n", | |
490 | wandev->name, conf->data_size); | |
491 | } | |
492 | ||
493 | kfree(conf); | |
494 | return err; | |
495 | } | |
496 | ||
497 | /* | |
498 | * Shutdown WAN device. | |
499 | * o delete all not opened logical channels for this device | |
500 | * o call driver's shutdown() entry point | |
501 | */ | |
502 | ||
503 | static int wanrouter_device_shutdown(struct wan_device *wandev) | |
504 | { | |
505 | struct net_device *dev; | |
506 | int err=0; | |
507 | ||
508 | if (wandev->state == WAN_UNCONFIGURED) | |
509 | return 0; | |
510 | ||
511 | printk(KERN_INFO "\n%s: Shutting Down!\n",wandev->name); | |
512 | ||
513 | for (dev = wandev->dev; dev;) { | |
514 | err = wanrouter_delete_interface(wandev, dev->name); | |
515 | if (err) | |
516 | return err; | |
517 | /* The above function deallocates the current dev | |
7be6065b | 518 | * structure. Therefore, we cannot use netdev_priv(dev) |
1da177e4 LT |
519 | * as the next element: wandev->dev points to the |
520 | * next element */ | |
521 | dev = wandev->dev; | |
522 | } | |
523 | ||
524 | if (wandev->ndev) | |
525 | return -EBUSY; /* there are opened interfaces */ | |
526 | ||
527 | if (wandev->shutdown) | |
528 | err=wandev->shutdown(wandev); | |
529 | ||
530 | return err; | |
531 | } | |
532 | ||
533 | /* | |
534 | * Get WAN device status & statistics. | |
535 | */ | |
536 | ||
537 | static int wanrouter_device_stat(struct wan_device *wandev, | |
538 | wandev_stat_t __user *u_stat) | |
539 | { | |
540 | wandev_stat_t stat; | |
541 | ||
542 | memset(&stat, 0, sizeof(stat)); | |
543 | ||
544 | /* Ask device driver to update device statistics */ | |
545 | if ((wandev->state != WAN_UNCONFIGURED) && wandev->update) | |
546 | wandev->update(wandev); | |
547 | ||
548 | /* Fill out structure */ | |
549 | stat.ndev = wandev->ndev; | |
550 | stat.state = wandev->state; | |
551 | ||
552 | if (copy_to_user(u_stat, &stat, sizeof(stat))) | |
553 | return -EFAULT; | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | /* | |
559 | * Create new WAN interface. | |
560 | * o verify user address space | |
561 | * o copy configuration data to kernel address space | |
562 | * o allocate network interface data space | |
563 | * o call driver's new_if() entry point | |
564 | * o make sure there is no interface name conflict | |
565 | * o register network interface | |
566 | */ | |
567 | ||
568 | static int wanrouter_device_new_if(struct wan_device *wandev, | |
569 | wanif_conf_t __user *u_conf) | |
570 | { | |
571 | wanif_conf_t *cnf; | |
572 | struct net_device *dev = NULL; | |
1da177e4 LT |
573 | int err; |
574 | ||
575 | if ((wandev->state == WAN_UNCONFIGURED) || (wandev->new_if == NULL)) | |
576 | return -ENODEV; | |
577 | ||
578 | cnf = kmalloc(sizeof(wanif_conf_t), GFP_KERNEL); | |
579 | if (!cnf) | |
580 | return -ENOBUFS; | |
581 | ||
582 | err = -EFAULT; | |
583 | if (copy_from_user(cnf, u_conf, sizeof(wanif_conf_t))) | |
584 | goto out; | |
585 | ||
586 | err = -EINVAL; | |
587 | if (cnf->magic != ROUTER_MAGIC) | |
588 | goto out; | |
589 | ||
590 | if (cnf->config_id == WANCONFIG_MPPP) { | |
1da177e4 LT |
591 | printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!\n", |
592 | wandev->name); | |
593 | err = -EPROTONOSUPPORT; | |
594 | goto out; | |
1da177e4 | 595 | } else { |
1da177e4 LT |
596 | err = wandev->new_if(wandev, dev, cnf); |
597 | } | |
598 | ||
599 | if (!err) { | |
600 | /* Register network interface. This will invoke init() | |
601 | * function supplied by the driver. If device registered | |
602 | * successfully, add it to the interface list. | |
603 | */ | |
604 | ||
605 | if (dev->name == NULL) { | |
606 | err = -EINVAL; | |
607 | } else { | |
608 | ||
609 | #ifdef WANDEBUG | |
610 | printk(KERN_INFO "%s: registering interface %s...\n", | |
611 | wanrouter_modname, dev->name); | |
612 | #endif | |
613 | ||
614 | err = register_netdev(dev); | |
615 | if (!err) { | |
616 | struct net_device *slave = NULL; | |
617 | unsigned long smp_flags=0; | |
618 | ||
619 | lock_adapter_irq(&wandev->lock, &smp_flags); | |
620 | ||
621 | if (wandev->dev == NULL) { | |
622 | wandev->dev = dev; | |
623 | } else { | |
624 | for (slave=wandev->dev; | |
7be6065b WC |
625 | DEV_TO_SLAVE(slave); |
626 | slave = DEV_TO_SLAVE(slave)) | |
627 | DEV_TO_SLAVE(slave) = dev; | |
1da177e4 LT |
628 | } |
629 | ++wandev->ndev; | |
630 | ||
631 | unlock_adapter_irq(&wandev->lock, &smp_flags); | |
632 | err = 0; /* done !!! */ | |
633 | goto out; | |
634 | } | |
635 | } | |
636 | if (wandev->del_if) | |
637 | wandev->del_if(wandev, dev); | |
7be6065b | 638 | free_netdev(dev); |
1da177e4 LT |
639 | } |
640 | ||
1da177e4 LT |
641 | out: |
642 | kfree(cnf); | |
643 | return err; | |
644 | } | |
645 | ||
646 | ||
647 | /* | |
648 | * Delete WAN logical channel. | |
649 | * o verify user address space | |
650 | * o copy configuration data to kernel address space | |
651 | */ | |
652 | ||
653 | static int wanrouter_device_del_if(struct wan_device *wandev, char __user *u_name) | |
654 | { | |
655 | char name[WAN_IFNAME_SZ + 1]; | |
4ba6122b | 656 | int err = 0; |
1da177e4 LT |
657 | |
658 | if (wandev->state == WAN_UNCONFIGURED) | |
659 | return -ENODEV; | |
660 | ||
661 | memset(name, 0, sizeof(name)); | |
662 | ||
663 | if (copy_from_user(name, u_name, WAN_IFNAME_SZ)) | |
664 | return -EFAULT; | |
665 | ||
666 | err = wanrouter_delete_interface(wandev, name); | |
667 | if (err) | |
668 | return err; | |
669 | ||
670 | /* If last interface being deleted, shutdown card | |
671 | * This helps with administration at leaf nodes | |
672 | * (You can tell if the person at the other end of the phone | |
673 | * has an interface configured) and avoids DoS vulnerabilities | |
674 | * in binary driver files - this fixes a problem with the current | |
675 | * Sangoma driver going into strange states when all the network | |
676 | * interfaces are deleted and the link irrecoverably disconnected. | |
677 | */ | |
678 | ||
4ba6122b YH |
679 | if (!wandev->ndev && wandev->shutdown) |
680 | err = wandev->shutdown(wandev); | |
1da177e4 LT |
681 | |
682 | return err; | |
683 | } | |
684 | ||
685 | /* | |
686 | * Miscellaneous Functions | |
687 | */ | |
688 | ||
689 | /* | |
690 | * Find WAN device by name. | |
691 | * Return pointer to the WAN device data space or NULL if device not found. | |
692 | */ | |
693 | ||
694 | static struct wan_device *wanrouter_find_device(char *name) | |
695 | { | |
696 | struct wan_device *wandev; | |
697 | ||
698 | for (wandev = wanrouter_router_devlist; | |
699 | wandev && strcmp(wandev->name, name); | |
700 | wandev = wandev->next); | |
701 | return wandev; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Delete WAN logical channel identified by its name. | |
706 | * o find logical channel by its name | |
707 | * o call driver's del_if() entry point | |
708 | * o unregister network interface | |
709 | * o unlink channel data space from linked list of channels | |
710 | * o release channel data space | |
711 | * | |
712 | * Return: 0 success | |
713 | * -ENODEV channel not found. | |
714 | * -EBUSY interface is open | |
715 | * | |
716 | * Note: If (force != 0), then device will be destroyed even if interface | |
717 | * associated with it is open. It's caller's responsibility to make | |
718 | * sure that opened interfaces are not removed! | |
719 | */ | |
720 | ||
721 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name) | |
722 | { | |
723 | struct net_device *dev = NULL, *prev = NULL; | |
724 | unsigned long smp_flags=0; | |
725 | ||
726 | lock_adapter_irq(&wandev->lock, &smp_flags); | |
727 | dev = wandev->dev; | |
728 | prev = NULL; | |
729 | while (dev && strcmp(name, dev->name)) { | |
7be6065b | 730 | struct net_device **slave = netdev_priv(dev); |
1da177e4 LT |
731 | prev = dev; |
732 | dev = *slave; | |
733 | } | |
734 | unlock_adapter_irq(&wandev->lock, &smp_flags); | |
735 | ||
736 | if (dev == NULL) | |
737 | return -ENODEV; /* interface not found */ | |
738 | ||
739 | if (netif_running(dev)) | |
740 | return -EBUSY; /* interface in use */ | |
741 | ||
742 | if (wandev->del_if) | |
743 | wandev->del_if(wandev, dev); | |
744 | ||
745 | lock_adapter_irq(&wandev->lock, &smp_flags); | |
746 | if (prev) { | |
7be6065b WC |
747 | struct net_device **prev_slave = netdev_priv(prev); |
748 | struct net_device **slave = netdev_priv(dev); | |
1da177e4 LT |
749 | |
750 | *prev_slave = *slave; | |
751 | } else { | |
7be6065b | 752 | struct net_device **slave = netdev_priv(dev); |
1da177e4 LT |
753 | wandev->dev = *slave; |
754 | } | |
755 | --wandev->ndev; | |
756 | unlock_adapter_irq(&wandev->lock, &smp_flags); | |
757 | ||
758 | printk(KERN_INFO "%s: unregistering '%s'\n", wandev->name, dev->name); | |
759 | ||
1da177e4 LT |
760 | unregister_netdev(dev); |
761 | ||
762 | free_netdev(dev); | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
97353cb4 | 767 | static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
9ee62630 | 768 | __acquires(lock) |
1da177e4 | 769 | { |
4ba6122b | 770 | spin_lock_irqsave(lock, *smp_flags); |
1da177e4 LT |
771 | } |
772 | ||
773 | ||
97353cb4 | 774 | static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
9ee62630 | 775 | __releases(lock) |
1da177e4 LT |
776 | { |
777 | spin_unlock_irqrestore(lock, *smp_flags); | |
778 | } | |
779 | ||
780 | EXPORT_SYMBOL(register_wan_device); | |
781 | EXPORT_SYMBOL(unregister_wan_device); | |
1da177e4 LT |
782 | |
783 | MODULE_LICENSE("GPL"); | |
784 | ||
785 | /* | |
786 | * End | |
787 | */ |