]>
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. */ | |
60 | #include <net/syncppp.h> | |
61 | ||
62 | #define KMEM_SAFETYZONE 8 | |
63 | ||
1da177e4 LT |
64 | /* |
65 | * Function Prototypes | |
66 | */ | |
67 | ||
68 | /* | |
69 | * WAN device IOCTL handlers | |
70 | */ | |
71 | ||
72 | static int wanrouter_device_setup(struct wan_device *wandev, | |
73 | wandev_conf_t __user *u_conf); | |
74 | static int wanrouter_device_stat(struct wan_device *wandev, | |
75 | wandev_stat_t __user *u_stat); | |
76 | static int wanrouter_device_shutdown(struct wan_device *wandev); | |
77 | static int wanrouter_device_new_if(struct wan_device *wandev, | |
78 | wanif_conf_t __user *u_conf); | |
79 | static int wanrouter_device_del_if(struct wan_device *wandev, | |
80 | char __user *u_name); | |
81 | ||
82 | /* | |
83 | * Miscellaneous | |
84 | */ | |
85 | ||
86 | static struct wan_device *wanrouter_find_device(char *name); | |
87 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name); | |
97353cb4 AB |
88 | static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags); |
89 | static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags); | |
1da177e4 LT |
90 | |
91 | ||
92 | ||
93 | /* | |
94 | * Global Data | |
95 | */ | |
96 | ||
97 | static char wanrouter_fullname[] = "Sangoma WANPIPE Router"; | |
98 | static char wanrouter_copyright[] = "(c) 1995-2000 Sangoma Technologies Inc."; | |
99 | static char wanrouter_modname[] = ROUTER_NAME; /* short module name */ | |
100 | struct wan_device* wanrouter_router_devlist; /* list of registered devices */ | |
101 | ||
102 | /* | |
103 | * Organize Unique Identifiers for encapsulation/decapsulation | |
104 | */ | |
105 | ||
1da177e4 | 106 | #if 0 |
97353cb4 | 107 | static unsigned char wanrouter_oui_ether[] = { 0x00, 0x00, 0x00 }; |
1da177e4 LT |
108 | static unsigned char wanrouter_oui_802_2[] = { 0x00, 0x80, 0xC2 }; |
109 | #endif | |
110 | ||
111 | static int __init wanrouter_init(void) | |
112 | { | |
113 | int err; | |
114 | ||
115 | printk(KERN_INFO "%s v%u.%u %s\n", | |
116 | wanrouter_fullname, ROUTER_VERSION, ROUTER_RELEASE, | |
117 | wanrouter_copyright); | |
118 | ||
119 | err = wanrouter_proc_init(); | |
120 | if (err) | |
121 | printk(KERN_INFO "%s: can't create entry in proc filesystem!\n", | |
122 | wanrouter_modname); | |
123 | ||
124 | return err; | |
125 | } | |
126 | ||
127 | static void __exit wanrouter_cleanup (void) | |
128 | { | |
129 | wanrouter_proc_cleanup(); | |
130 | } | |
131 | ||
132 | /* | |
133 | * This is just plain dumb. We should move the bugger to drivers/net/wan, | |
134 | * slap it first in directory and make it module_init(). The only reason | |
135 | * for subsys_initcall() here is that net goes after drivers (why, BTW?) | |
136 | */ | |
137 | subsys_initcall(wanrouter_init); | |
138 | module_exit(wanrouter_cleanup); | |
139 | ||
140 | /* | |
141 | * Kernel APIs | |
142 | */ | |
143 | ||
144 | /* | |
145 | * Register WAN device. | |
146 | * o verify device credentials | |
147 | * o create an entry for the device in the /proc/net/router directory | |
148 | * o initialize internally maintained fields of the wan_device structure | |
149 | * o link device data space to a singly-linked list | |
150 | * o if it's the first device, then start kernel 'thread' | |
151 | * o increment module use count | |
152 | * | |
153 | * Return: | |
154 | * 0 Ok | |
155 | * < 0 error. | |
156 | * | |
157 | * Context: process | |
158 | */ | |
159 | ||
160 | ||
161 | int register_wan_device(struct wan_device *wandev) | |
162 | { | |
163 | int err, namelen; | |
164 | ||
165 | if ((wandev == NULL) || (wandev->magic != ROUTER_MAGIC) || | |
166 | (wandev->name == NULL)) | |
167 | return -EINVAL; | |
168 | ||
169 | namelen = strlen(wandev->name); | |
170 | if (!namelen || (namelen > WAN_DRVNAME_SZ)) | |
171 | return -EINVAL; | |
172 | ||
173 | if (wanrouter_find_device(wandev->name)) | |
174 | return -EEXIST; | |
175 | ||
176 | #ifdef WANDEBUG | |
177 | printk(KERN_INFO "%s: registering WAN device %s\n", | |
178 | wanrouter_modname, wandev->name); | |
179 | #endif | |
180 | ||
181 | /* | |
182 | * Register /proc directory entry | |
183 | */ | |
184 | err = wanrouter_proc_add(wandev); | |
185 | if (err) { | |
186 | printk(KERN_INFO | |
187 | "%s: can't create /proc/net/router/%s entry!\n", | |
188 | wanrouter_modname, wandev->name); | |
189 | return err; | |
190 | } | |
191 | ||
192 | /* | |
193 | * Initialize fields of the wan_device structure maintained by the | |
194 | * router and update local data. | |
195 | */ | |
196 | ||
197 | wandev->ndev = 0; | |
198 | wandev->dev = NULL; | |
199 | wandev->next = wanrouter_router_devlist; | |
200 | wanrouter_router_devlist = wandev; | |
201 | return 0; | |
202 | } | |
203 | ||
204 | /* | |
205 | * Unregister WAN device. | |
206 | * o shut down device | |
207 | * o unlink device data space from the linked list | |
208 | * o delete device entry in the /proc/net/router directory | |
209 | * o decrement module use count | |
210 | * | |
211 | * Return: 0 Ok | |
212 | * <0 error. | |
213 | * Context: process | |
214 | */ | |
215 | ||
216 | ||
217 | int unregister_wan_device(char *name) | |
218 | { | |
219 | struct wan_device *wandev, *prev; | |
220 | ||
221 | if (name == NULL) | |
222 | return -EINVAL; | |
223 | ||
224 | for (wandev = wanrouter_router_devlist, prev = NULL; | |
225 | wandev && strcmp(wandev->name, name); | |
226 | prev = wandev, wandev = wandev->next) | |
227 | ; | |
228 | if (wandev == NULL) | |
229 | return -ENODEV; | |
230 | ||
231 | #ifdef WANDEBUG | |
232 | printk(KERN_INFO "%s: unregistering WAN device %s\n", | |
233 | wanrouter_modname, name); | |
234 | #endif | |
235 | ||
236 | if (wandev->state != WAN_UNCONFIGURED) | |
237 | wanrouter_device_shutdown(wandev); | |
238 | ||
239 | if (prev) | |
240 | prev->next = wandev->next; | |
241 | else | |
242 | wanrouter_router_devlist = wandev->next; | |
243 | ||
244 | wanrouter_proc_delete(wandev); | |
245 | return 0; | |
246 | } | |
247 | ||
97353cb4 AB |
248 | #if 0 |
249 | ||
1da177e4 LT |
250 | /* |
251 | * Encapsulate packet. | |
252 | * | |
253 | * Return: encapsulation header size | |
254 | * < 0 - unsupported Ethertype | |
255 | * | |
256 | * Notes: | |
257 | * 1. This function may be called on interrupt context. | |
258 | */ | |
259 | ||
260 | ||
261 | int wanrouter_encapsulate(struct sk_buff *skb, struct net_device *dev, | |
262 | unsigned short type) | |
263 | { | |
264 | int hdr_len = 0; | |
265 | ||
266 | switch (type) { | |
267 | case ETH_P_IP: /* IP datagram encapsulation */ | |
268 | hdr_len += 1; | |
269 | skb_push(skb, 1); | |
270 | skb->data[0] = NLPID_IP; | |
271 | break; | |
272 | ||
273 | case ETH_P_IPX: /* SNAP encapsulation */ | |
274 | case ETH_P_ARP: | |
275 | hdr_len += 7; | |
276 | skb_push(skb, 7); | |
277 | skb->data[0] = 0; | |
278 | skb->data[1] = NLPID_SNAP; | |
27d7ff46 ACM |
279 | skb_copy_to_linear_data_offset(skb, 2, wanrouter_oui_ether, |
280 | sizeof(wanrouter_oui_ether)); | |
1da177e4 LT |
281 | *((unsigned short*)&skb->data[5]) = htons(type); |
282 | break; | |
283 | ||
284 | default: /* Unknown packet type */ | |
285 | printk(KERN_INFO | |
286 | "%s: unsupported Ethertype 0x%04X on interface %s!\n", | |
287 | wanrouter_modname, type, dev->name); | |
288 | hdr_len = -EINVAL; | |
289 | } | |
290 | return hdr_len; | |
291 | } | |
292 | ||
293 | ||
294 | /* | |
295 | * Decapsulate packet. | |
296 | * | |
297 | * Return: Ethertype (in network order) | |
298 | * 0 unknown encapsulation | |
299 | * | |
300 | * Notes: | |
301 | * 1. This function may be called on interrupt context. | |
302 | */ | |
303 | ||
304 | ||
ab611487 | 305 | __be16 wanrouter_type_trans(struct sk_buff *skb, struct net_device *dev) |
1da177e4 LT |
306 | { |
307 | int cnt = skb->data[0] ? 0 : 1; /* there may be a pad present */ | |
ab611487 | 308 | __be16 ethertype; |
1da177e4 LT |
309 | |
310 | switch (skb->data[cnt]) { | |
311 | case NLPID_IP: /* IP datagramm */ | |
312 | ethertype = htons(ETH_P_IP); | |
313 | cnt += 1; | |
314 | break; | |
315 | ||
4ba6122b | 316 | case NLPID_SNAP: /* SNAP encapsulation */ |
1da177e4 LT |
317 | if (memcmp(&skb->data[cnt + 1], wanrouter_oui_ether, |
318 | sizeof(wanrouter_oui_ether))){ | |
4ba6122b | 319 | printk(KERN_INFO |
1da177e4 LT |
320 | "%s: unsupported SNAP OUI %02X-%02X-%02X " |
321 | "on interface %s!\n", wanrouter_modname, | |
322 | skb->data[cnt+1], skb->data[cnt+2], | |
323 | skb->data[cnt+3], dev->name); | |
324 | return 0; | |
325 | } | |
ab611487 | 326 | ethertype = *((__be16*)&skb->data[cnt+4]); |
1da177e4 LT |
327 | cnt += 6; |
328 | break; | |
329 | ||
330 | /* add other protocols, e.g. CLNP, ESIS, ISIS, if needed */ | |
331 | ||
332 | default: | |
333 | printk(KERN_INFO | |
334 | "%s: unsupported NLPID 0x%02X on interface %s!\n", | |
335 | wanrouter_modname, skb->data[cnt], dev->name); | |
336 | return 0; | |
337 | } | |
338 | skb->protocol = ethertype; | |
339 | skb->pkt_type = PACKET_HOST; /* Physically point to point */ | |
340 | skb_pull(skb, cnt); | |
459a98ed | 341 | skb_reset_mac_header(skb); |
1da177e4 LT |
342 | return ethertype; |
343 | } | |
344 | ||
97353cb4 | 345 | #endif /* 0 */ |
1da177e4 LT |
346 | |
347 | /* | |
348 | * WAN device IOCTL. | |
349 | * o find WAN device associated with this node | |
350 | * o execute requested action or pass command to the device driver | |
351 | */ | |
352 | ||
866988ed | 353 | long wanrouter_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 | 354 | { |
866988ed | 355 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
356 | int err = 0; |
357 | struct proc_dir_entry *dent; | |
358 | struct wan_device *wandev; | |
359 | void __user *data = (void __user *)arg; | |
360 | ||
361 | if (!capable(CAP_NET_ADMIN)) | |
362 | return -EPERM; | |
363 | ||
364 | if ((cmd >> 8) != ROUTER_IOCTL) | |
365 | return -EINVAL; | |
366 | ||
367 | dent = PDE(inode); | |
368 | if ((dent == NULL) || (dent->data == NULL)) | |
369 | return -EINVAL; | |
370 | ||
371 | wandev = dent->data; | |
372 | if (wandev->magic != ROUTER_MAGIC) | |
373 | return -EINVAL; | |
374 | ||
866988ed | 375 | lock_kernel(); |
1da177e4 LT |
376 | switch (cmd) { |
377 | case ROUTER_SETUP: | |
378 | err = wanrouter_device_setup(wandev, data); | |
379 | break; | |
380 | ||
381 | case ROUTER_DOWN: | |
382 | err = wanrouter_device_shutdown(wandev); | |
383 | break; | |
384 | ||
385 | case ROUTER_STAT: | |
386 | err = wanrouter_device_stat(wandev, data); | |
387 | break; | |
388 | ||
389 | case ROUTER_IFNEW: | |
390 | err = wanrouter_device_new_if(wandev, data); | |
391 | break; | |
392 | ||
393 | case ROUTER_IFDEL: | |
394 | err = wanrouter_device_del_if(wandev, data); | |
395 | break; | |
396 | ||
397 | case ROUTER_IFSTAT: | |
398 | break; | |
399 | ||
400 | default: | |
401 | if ((cmd >= ROUTER_USER) && | |
402 | (cmd <= ROUTER_USER_MAX) && | |
403 | wandev->ioctl) | |
404 | err = wandev->ioctl(wandev, cmd, arg); | |
405 | else err = -EINVAL; | |
406 | } | |
866988ed | 407 | unlock_kernel(); |
1da177e4 LT |
408 | return err; |
409 | } | |
410 | ||
411 | /* | |
412 | * WAN Driver IOCTL Handlers | |
413 | */ | |
414 | ||
415 | /* | |
416 | * Setup WAN link device. | |
417 | * o verify user address space | |
418 | * o allocate kernel memory and copy configuration data to kernel space | |
419 | * o if configuration data includes extension, copy it to kernel space too | |
420 | * o call driver's setup() entry point | |
421 | */ | |
422 | ||
423 | static int wanrouter_device_setup(struct wan_device *wandev, | |
424 | wandev_conf_t __user *u_conf) | |
425 | { | |
426 | void *data = NULL; | |
427 | wandev_conf_t *conf; | |
428 | int err = -EINVAL; | |
429 | ||
430 | if (wandev->setup == NULL) { /* Nothing to do ? */ | |
431 | printk(KERN_INFO "%s: ERROR, No setup script: wandev->setup()\n", | |
432 | wandev->name); | |
433 | return 0; | |
434 | } | |
435 | ||
436 | conf = kmalloc(sizeof(wandev_conf_t), GFP_KERNEL); | |
437 | if (conf == NULL){ | |
438 | printk(KERN_INFO "%s: ERROR, Failed to allocate kernel memory !\n", | |
439 | wandev->name); | |
440 | return -ENOBUFS; | |
441 | } | |
442 | ||
443 | if (copy_from_user(conf, u_conf, sizeof(wandev_conf_t))) { | |
444 | printk(KERN_INFO "%s: Failed to copy user config data to kernel space!\n", | |
445 | wandev->name); | |
446 | kfree(conf); | |
447 | return -EFAULT; | |
448 | } | |
449 | ||
450 | if (conf->magic != ROUTER_MAGIC) { | |
451 | kfree(conf); | |
452 | printk(KERN_INFO "%s: ERROR, Invalid MAGIC Number\n", | |
453 | wandev->name); | |
4ba6122b | 454 | return -EINVAL; |
1da177e4 LT |
455 | } |
456 | ||
457 | if (conf->data_size && conf->data) { | |
75202e76 | 458 | if (conf->data_size > 128000) { |
1da177e4 LT |
459 | printk(KERN_INFO |
460 | "%s: ERROR, Invalid firmware data size %i !\n", | |
461 | wandev->name, conf->data_size); | |
462 | kfree(conf); | |
4ba6122b | 463 | return -EINVAL; |
1da177e4 LT |
464 | } |
465 | ||
466 | data = vmalloc(conf->data_size); | |
467 | if (!data) { | |
468 | printk(KERN_INFO | |
4ba6122b | 469 | "%s: ERROR, Faild allocate kernel memory !\n", |
1da177e4 LT |
470 | wandev->name); |
471 | kfree(conf); | |
472 | return -ENOBUFS; | |
473 | } | |
474 | if (!copy_from_user(data, conf->data, conf->data_size)) { | |
475 | conf->data = data; | |
476 | err = wandev->setup(wandev, conf); | |
477 | } else { | |
478 | printk(KERN_INFO | |
479 | "%s: ERROR, Faild to copy from user data !\n", | |
480 | wandev->name); | |
481 | err = -EFAULT; | |
482 | } | |
483 | vfree(data); | |
484 | } else { | |
485 | printk(KERN_INFO | |
486 | "%s: ERROR, No firmware found ! Firmware size = %i !\n", | |
487 | wandev->name, conf->data_size); | |
488 | } | |
489 | ||
490 | kfree(conf); | |
491 | return err; | |
492 | } | |
493 | ||
494 | /* | |
495 | * Shutdown WAN device. | |
496 | * o delete all not opened logical channels for this device | |
497 | * o call driver's shutdown() entry point | |
498 | */ | |
499 | ||
500 | static int wanrouter_device_shutdown(struct wan_device *wandev) | |
501 | { | |
502 | struct net_device *dev; | |
503 | int err=0; | |
504 | ||
505 | if (wandev->state == WAN_UNCONFIGURED) | |
506 | return 0; | |
507 | ||
508 | printk(KERN_INFO "\n%s: Shutting Down!\n",wandev->name); | |
509 | ||
510 | for (dev = wandev->dev; dev;) { | |
511 | err = wanrouter_delete_interface(wandev, dev->name); | |
512 | if (err) | |
513 | return err; | |
514 | /* The above function deallocates the current dev | |
515 | * structure. Therefore, we cannot use dev->priv | |
516 | * as the next element: wandev->dev points to the | |
517 | * next element */ | |
518 | dev = wandev->dev; | |
519 | } | |
520 | ||
521 | if (wandev->ndev) | |
522 | return -EBUSY; /* there are opened interfaces */ | |
523 | ||
524 | if (wandev->shutdown) | |
525 | err=wandev->shutdown(wandev); | |
526 | ||
527 | return err; | |
528 | } | |
529 | ||
530 | /* | |
531 | * Get WAN device status & statistics. | |
532 | */ | |
533 | ||
534 | static int wanrouter_device_stat(struct wan_device *wandev, | |
535 | wandev_stat_t __user *u_stat) | |
536 | { | |
537 | wandev_stat_t stat; | |
538 | ||
539 | memset(&stat, 0, sizeof(stat)); | |
540 | ||
541 | /* Ask device driver to update device statistics */ | |
542 | if ((wandev->state != WAN_UNCONFIGURED) && wandev->update) | |
543 | wandev->update(wandev); | |
544 | ||
545 | /* Fill out structure */ | |
546 | stat.ndev = wandev->ndev; | |
547 | stat.state = wandev->state; | |
548 | ||
549 | if (copy_to_user(u_stat, &stat, sizeof(stat))) | |
550 | return -EFAULT; | |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Create new WAN interface. | |
557 | * o verify user address space | |
558 | * o copy configuration data to kernel address space | |
559 | * o allocate network interface data space | |
560 | * o call driver's new_if() entry point | |
561 | * o make sure there is no interface name conflict | |
562 | * o register network interface | |
563 | */ | |
564 | ||
565 | static int wanrouter_device_new_if(struct wan_device *wandev, | |
566 | wanif_conf_t __user *u_conf) | |
567 | { | |
568 | wanif_conf_t *cnf; | |
569 | struct net_device *dev = NULL; | |
570 | #ifdef CONFIG_WANPIPE_MULTPPP | |
571 | struct ppp_device *pppdev=NULL; | |
572 | #endif | |
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) { | |
591 | #ifdef CONFIG_WANPIPE_MULTPPP | |
0da974f4 | 592 | pppdev = kzalloc(sizeof(struct ppp_device), GFP_KERNEL); |
1da177e4 LT |
593 | err = -ENOBUFS; |
594 | if (pppdev == NULL) | |
595 | goto out; | |
0da974f4 | 596 | pppdev->dev = kzalloc(sizeof(struct net_device), GFP_KERNEL); |
1da177e4 LT |
597 | if (pppdev->dev == NULL) { |
598 | kfree(pppdev); | |
599 | err = -ENOBUFS; | |
600 | goto out; | |
601 | } | |
1da177e4 LT |
602 | err = wandev->new_if(wandev, (struct net_device *)pppdev, cnf); |
603 | dev = pppdev->dev; | |
604 | #else | |
605 | printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!\n", | |
606 | wandev->name); | |
607 | err = -EPROTONOSUPPORT; | |
608 | goto out; | |
609 | #endif | |
610 | } else { | |
0da974f4 | 611 | dev = kzalloc(sizeof(struct net_device), GFP_KERNEL); |
1da177e4 LT |
612 | err = -ENOBUFS; |
613 | if (dev == NULL) | |
614 | goto out; | |
1da177e4 LT |
615 | err = wandev->new_if(wandev, dev, cnf); |
616 | } | |
617 | ||
618 | if (!err) { | |
619 | /* Register network interface. This will invoke init() | |
620 | * function supplied by the driver. If device registered | |
621 | * successfully, add it to the interface list. | |
622 | */ | |
623 | ||
624 | if (dev->name == NULL) { | |
625 | err = -EINVAL; | |
626 | } else { | |
627 | ||
628 | #ifdef WANDEBUG | |
629 | printk(KERN_INFO "%s: registering interface %s...\n", | |
630 | wanrouter_modname, dev->name); | |
631 | #endif | |
632 | ||
633 | err = register_netdev(dev); | |
634 | if (!err) { | |
635 | struct net_device *slave = NULL; | |
636 | unsigned long smp_flags=0; | |
637 | ||
638 | lock_adapter_irq(&wandev->lock, &smp_flags); | |
639 | ||
640 | if (wandev->dev == NULL) { | |
641 | wandev->dev = dev; | |
642 | } else { | |
643 | for (slave=wandev->dev; | |
644 | *((struct net_device **)slave->priv); | |
645 | slave = *((struct net_device **)slave->priv)); | |
646 | ||
647 | *((struct net_device **)slave->priv) = dev; | |
648 | } | |
649 | ++wandev->ndev; | |
650 | ||
651 | unlock_adapter_irq(&wandev->lock, &smp_flags); | |
652 | err = 0; /* done !!! */ | |
653 | goto out; | |
654 | } | |
655 | } | |
656 | if (wandev->del_if) | |
657 | wandev->del_if(wandev, dev); | |
658 | } | |
659 | ||
660 | /* This code has moved from del_if() function */ | |
a51482bd JJ |
661 | kfree(dev->priv); |
662 | dev->priv = NULL; | |
1da177e4 LT |
663 | |
664 | #ifdef CONFIG_WANPIPE_MULTPPP | |
665 | if (cnf->config_id == WANCONFIG_MPPP) | |
666 | kfree(pppdev); | |
667 | else | |
668 | kfree(dev); | |
669 | #else | |
670 | /* Sync PPP is disabled */ | |
671 | if (cnf->config_id != WANCONFIG_MPPP) | |
672 | kfree(dev); | |
673 | #endif | |
674 | ||
675 | out: | |
676 | kfree(cnf); | |
677 | return err; | |
678 | } | |
679 | ||
680 | ||
681 | /* | |
682 | * Delete WAN logical channel. | |
683 | * o verify user address space | |
684 | * o copy configuration data to kernel address space | |
685 | */ | |
686 | ||
687 | static int wanrouter_device_del_if(struct wan_device *wandev, char __user *u_name) | |
688 | { | |
689 | char name[WAN_IFNAME_SZ + 1]; | |
4ba6122b | 690 | int err = 0; |
1da177e4 LT |
691 | |
692 | if (wandev->state == WAN_UNCONFIGURED) | |
693 | return -ENODEV; | |
694 | ||
695 | memset(name, 0, sizeof(name)); | |
696 | ||
697 | if (copy_from_user(name, u_name, WAN_IFNAME_SZ)) | |
698 | return -EFAULT; | |
699 | ||
700 | err = wanrouter_delete_interface(wandev, name); | |
701 | if (err) | |
702 | return err; | |
703 | ||
704 | /* If last interface being deleted, shutdown card | |
705 | * This helps with administration at leaf nodes | |
706 | * (You can tell if the person at the other end of the phone | |
707 | * has an interface configured) and avoids DoS vulnerabilities | |
708 | * in binary driver files - this fixes a problem with the current | |
709 | * Sangoma driver going into strange states when all the network | |
710 | * interfaces are deleted and the link irrecoverably disconnected. | |
711 | */ | |
712 | ||
4ba6122b YH |
713 | if (!wandev->ndev && wandev->shutdown) |
714 | err = wandev->shutdown(wandev); | |
1da177e4 LT |
715 | |
716 | return err; | |
717 | } | |
718 | ||
719 | /* | |
720 | * Miscellaneous Functions | |
721 | */ | |
722 | ||
723 | /* | |
724 | * Find WAN device by name. | |
725 | * Return pointer to the WAN device data space or NULL if device not found. | |
726 | */ | |
727 | ||
728 | static struct wan_device *wanrouter_find_device(char *name) | |
729 | { | |
730 | struct wan_device *wandev; | |
731 | ||
732 | for (wandev = wanrouter_router_devlist; | |
733 | wandev && strcmp(wandev->name, name); | |
734 | wandev = wandev->next); | |
735 | return wandev; | |
736 | } | |
737 | ||
738 | /* | |
739 | * Delete WAN logical channel identified by its name. | |
740 | * o find logical channel by its name | |
741 | * o call driver's del_if() entry point | |
742 | * o unregister network interface | |
743 | * o unlink channel data space from linked list of channels | |
744 | * o release channel data space | |
745 | * | |
746 | * Return: 0 success | |
747 | * -ENODEV channel not found. | |
748 | * -EBUSY interface is open | |
749 | * | |
750 | * Note: If (force != 0), then device will be destroyed even if interface | |
751 | * associated with it is open. It's caller's responsibility to make | |
752 | * sure that opened interfaces are not removed! | |
753 | */ | |
754 | ||
755 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name) | |
756 | { | |
757 | struct net_device *dev = NULL, *prev = NULL; | |
758 | unsigned long smp_flags=0; | |
759 | ||
760 | lock_adapter_irq(&wandev->lock, &smp_flags); | |
761 | dev = wandev->dev; | |
762 | prev = NULL; | |
763 | while (dev && strcmp(name, dev->name)) { | |
764 | struct net_device **slave = dev->priv; | |
765 | prev = dev; | |
766 | dev = *slave; | |
767 | } | |
768 | unlock_adapter_irq(&wandev->lock, &smp_flags); | |
769 | ||
770 | if (dev == NULL) | |
771 | return -ENODEV; /* interface not found */ | |
772 | ||
773 | if (netif_running(dev)) | |
774 | return -EBUSY; /* interface in use */ | |
775 | ||
776 | if (wandev->del_if) | |
777 | wandev->del_if(wandev, dev); | |
778 | ||
779 | lock_adapter_irq(&wandev->lock, &smp_flags); | |
780 | if (prev) { | |
781 | struct net_device **prev_slave = prev->priv; | |
782 | struct net_device **slave = dev->priv; | |
783 | ||
784 | *prev_slave = *slave; | |
785 | } else { | |
786 | struct net_device **slave = dev->priv; | |
787 | wandev->dev = *slave; | |
788 | } | |
789 | --wandev->ndev; | |
790 | unlock_adapter_irq(&wandev->lock, &smp_flags); | |
791 | ||
792 | printk(KERN_INFO "%s: unregistering '%s'\n", wandev->name, dev->name); | |
793 | ||
794 | /* Due to new interface linking method using dev->priv, | |
795 | * this code has moved from del_if() function.*/ | |
a51482bd JJ |
796 | kfree(dev->priv); |
797 | dev->priv=NULL; | |
1da177e4 LT |
798 | |
799 | unregister_netdev(dev); | |
800 | ||
801 | free_netdev(dev); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
97353cb4 | 806 | static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
1da177e4 | 807 | { |
4ba6122b | 808 | spin_lock_irqsave(lock, *smp_flags); |
1da177e4 LT |
809 | } |
810 | ||
811 | ||
97353cb4 | 812 | static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
1da177e4 LT |
813 | { |
814 | spin_unlock_irqrestore(lock, *smp_flags); | |
815 | } | |
816 | ||
817 | EXPORT_SYMBOL(register_wan_device); | |
818 | EXPORT_SYMBOL(unregister_wan_device); | |
1da177e4 LT |
819 | |
820 | MODULE_LICENSE("GPL"); | |
821 | ||
822 | /* | |
823 | * End | |
824 | */ |