Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
| 6 | * o WAN device managenment (registering, unregistering) |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/stddef.h> /* offsetof(), etc. */ |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 46 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <linux/errno.h> /* return codes */ |
| 48 | #include <linux/kernel.h> |
| 49 | #include <linux/init.h> |
| 50 | #include <linux/module.h> /* support for loadable modules */ |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 51 | #include <linux/slab.h> /* kmalloc(), kfree() */ |
| 52 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <linux/string.h> /* inline mem*, str* functions */ |
| 54 | |
| 55 | #include <asm/byteorder.h> /* htons(), etc. */ |
| 56 | #include <linux/wanrouter.h> /* WAN router API definitions */ |
| 57 | |
| 58 | #include <linux/vmalloc.h> /* vmalloc, vfree */ |
| 59 | #include <asm/uaccess.h> /* copy_to/from_user */ |
| 60 | #include <linux/init.h> /* __initfunc et al. */ |
| 61 | #include <net/syncppp.h> |
| 62 | |
| 63 | #define KMEM_SAFETYZONE 8 |
| 64 | |
| 65 | /***********FOR DEBUGGING PURPOSES********************************************* |
| 66 | static void * dbg_kmalloc(unsigned int size, int prio, int line) { |
| 67 | int i = 0; |
| 68 | void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio); |
| 69 | char * c1 = v; |
| 70 | c1 += sizeof(unsigned int); |
| 71 | *((unsigned int *)v) = size; |
| 72 | |
| 73 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 74 | c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D'; |
| 75 | c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F'; |
| 76 | c1 += 8; |
| 77 | } |
| 78 | c1 += size; |
| 79 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 80 | c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G'; |
| 81 | c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L'; |
| 82 | c1 += 8; |
| 83 | } |
| 84 | v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8; |
| 85 | printk(KERN_INFO "line %d kmalloc(%d,%d) = %p\n",line,size,prio,v); |
| 86 | return v; |
| 87 | } |
| 88 | static void dbg_kfree(void * v, int line) { |
| 89 | unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8)); |
| 90 | unsigned int size = *sp; |
| 91 | char * c1 = ((char *)v) - KMEM_SAFETYZONE*8; |
| 92 | int i = 0; |
| 93 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 94 | if ( c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D' |
| 95 | || c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') { |
| 96 | printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!\n",v); |
| 97 | printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8, |
| 98 | c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] ); |
| 99 | } |
| 100 | c1 += 8; |
| 101 | } |
| 102 | c1 += size; |
| 103 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 104 | if ( c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G' |
| 105 | || c1[4] != 'W' || c1[5] != 'A' || c1[6] != 'L' || c1[7] != 'L' |
| 106 | ) { |
| 107 | printk(KERN_INFO "kmalloced block at %p has been corrupted (overrun):\n",v); |
| 108 | printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8, |
| 109 | c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] ); |
| 110 | } |
| 111 | c1 += 8; |
| 112 | } |
| 113 | printk(KERN_INFO "line %d kfree(%p)\n",line,v); |
| 114 | v = ((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8); |
| 115 | kfree(v); |
| 116 | } |
| 117 | |
| 118 | #define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__) |
| 119 | #define kfree(x) dbg_kfree(x,__LINE__) |
| 120 | *****************************************************************************/ |
| 121 | |
| 122 | /* |
| 123 | * Function Prototypes |
| 124 | */ |
| 125 | |
| 126 | /* |
| 127 | * WAN device IOCTL handlers |
| 128 | */ |
| 129 | |
| 130 | static int wanrouter_device_setup(struct wan_device *wandev, |
| 131 | wandev_conf_t __user *u_conf); |
| 132 | static int wanrouter_device_stat(struct wan_device *wandev, |
| 133 | wandev_stat_t __user *u_stat); |
| 134 | static int wanrouter_device_shutdown(struct wan_device *wandev); |
| 135 | static int wanrouter_device_new_if(struct wan_device *wandev, |
| 136 | wanif_conf_t __user *u_conf); |
| 137 | static int wanrouter_device_del_if(struct wan_device *wandev, |
| 138 | char __user *u_name); |
| 139 | |
| 140 | /* |
| 141 | * Miscellaneous |
| 142 | */ |
| 143 | |
| 144 | static struct wan_device *wanrouter_find_device(char *name); |
| 145 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name); |
| 146 | void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags); |
| 147 | void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags); |
| 148 | |
| 149 | |
| 150 | |
| 151 | /* |
| 152 | * Global Data |
| 153 | */ |
| 154 | |
| 155 | static char wanrouter_fullname[] = "Sangoma WANPIPE Router"; |
| 156 | static char wanrouter_copyright[] = "(c) 1995-2000 Sangoma Technologies Inc."; |
| 157 | static char wanrouter_modname[] = ROUTER_NAME; /* short module name */ |
| 158 | struct wan_device* wanrouter_router_devlist; /* list of registered devices */ |
| 159 | |
| 160 | /* |
| 161 | * Organize Unique Identifiers for encapsulation/decapsulation |
| 162 | */ |
| 163 | |
| 164 | static unsigned char wanrouter_oui_ether[] = { 0x00, 0x00, 0x00 }; |
| 165 | #if 0 |
| 166 | static unsigned char wanrouter_oui_802_2[] = { 0x00, 0x80, 0xC2 }; |
| 167 | #endif |
| 168 | |
| 169 | static int __init wanrouter_init(void) |
| 170 | { |
| 171 | int err; |
| 172 | |
| 173 | printk(KERN_INFO "%s v%u.%u %s\n", |
| 174 | wanrouter_fullname, ROUTER_VERSION, ROUTER_RELEASE, |
| 175 | wanrouter_copyright); |
| 176 | |
| 177 | err = wanrouter_proc_init(); |
| 178 | if (err) |
| 179 | printk(KERN_INFO "%s: can't create entry in proc filesystem!\n", |
| 180 | wanrouter_modname); |
| 181 | |
| 182 | return err; |
| 183 | } |
| 184 | |
| 185 | static void __exit wanrouter_cleanup (void) |
| 186 | { |
| 187 | wanrouter_proc_cleanup(); |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * This is just plain dumb. We should move the bugger to drivers/net/wan, |
| 192 | * slap it first in directory and make it module_init(). The only reason |
| 193 | * for subsys_initcall() here is that net goes after drivers (why, BTW?) |
| 194 | */ |
| 195 | subsys_initcall(wanrouter_init); |
| 196 | module_exit(wanrouter_cleanup); |
| 197 | |
| 198 | /* |
| 199 | * Kernel APIs |
| 200 | */ |
| 201 | |
| 202 | /* |
| 203 | * Register WAN device. |
| 204 | * o verify device credentials |
| 205 | * o create an entry for the device in the /proc/net/router directory |
| 206 | * o initialize internally maintained fields of the wan_device structure |
| 207 | * o link device data space to a singly-linked list |
| 208 | * o if it's the first device, then start kernel 'thread' |
| 209 | * o increment module use count |
| 210 | * |
| 211 | * Return: |
| 212 | * 0 Ok |
| 213 | * < 0 error. |
| 214 | * |
| 215 | * Context: process |
| 216 | */ |
| 217 | |
| 218 | |
| 219 | int register_wan_device(struct wan_device *wandev) |
| 220 | { |
| 221 | int err, namelen; |
| 222 | |
| 223 | if ((wandev == NULL) || (wandev->magic != ROUTER_MAGIC) || |
| 224 | (wandev->name == NULL)) |
| 225 | return -EINVAL; |
| 226 | |
| 227 | namelen = strlen(wandev->name); |
| 228 | if (!namelen || (namelen > WAN_DRVNAME_SZ)) |
| 229 | return -EINVAL; |
| 230 | |
| 231 | if (wanrouter_find_device(wandev->name)) |
| 232 | return -EEXIST; |
| 233 | |
| 234 | #ifdef WANDEBUG |
| 235 | printk(KERN_INFO "%s: registering WAN device %s\n", |
| 236 | wanrouter_modname, wandev->name); |
| 237 | #endif |
| 238 | |
| 239 | /* |
| 240 | * Register /proc directory entry |
| 241 | */ |
| 242 | err = wanrouter_proc_add(wandev); |
| 243 | if (err) { |
| 244 | printk(KERN_INFO |
| 245 | "%s: can't create /proc/net/router/%s entry!\n", |
| 246 | wanrouter_modname, wandev->name); |
| 247 | return err; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * Initialize fields of the wan_device structure maintained by the |
| 252 | * router and update local data. |
| 253 | */ |
| 254 | |
| 255 | wandev->ndev = 0; |
| 256 | wandev->dev = NULL; |
| 257 | wandev->next = wanrouter_router_devlist; |
| 258 | wanrouter_router_devlist = wandev; |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * Unregister WAN device. |
| 264 | * o shut down device |
| 265 | * o unlink device data space from the linked list |
| 266 | * o delete device entry in the /proc/net/router directory |
| 267 | * o decrement module use count |
| 268 | * |
| 269 | * Return: 0 Ok |
| 270 | * <0 error. |
| 271 | * Context: process |
| 272 | */ |
| 273 | |
| 274 | |
| 275 | int unregister_wan_device(char *name) |
| 276 | { |
| 277 | struct wan_device *wandev, *prev; |
| 278 | |
| 279 | if (name == NULL) |
| 280 | return -EINVAL; |
| 281 | |
| 282 | for (wandev = wanrouter_router_devlist, prev = NULL; |
| 283 | wandev && strcmp(wandev->name, name); |
| 284 | prev = wandev, wandev = wandev->next) |
| 285 | ; |
| 286 | if (wandev == NULL) |
| 287 | return -ENODEV; |
| 288 | |
| 289 | #ifdef WANDEBUG |
| 290 | printk(KERN_INFO "%s: unregistering WAN device %s\n", |
| 291 | wanrouter_modname, name); |
| 292 | #endif |
| 293 | |
| 294 | if (wandev->state != WAN_UNCONFIGURED) |
| 295 | wanrouter_device_shutdown(wandev); |
| 296 | |
| 297 | if (prev) |
| 298 | prev->next = wandev->next; |
| 299 | else |
| 300 | wanrouter_router_devlist = wandev->next; |
| 301 | |
| 302 | wanrouter_proc_delete(wandev); |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Encapsulate packet. |
| 308 | * |
| 309 | * Return: encapsulation header size |
| 310 | * < 0 - unsupported Ethertype |
| 311 | * |
| 312 | * Notes: |
| 313 | * 1. This function may be called on interrupt context. |
| 314 | */ |
| 315 | |
| 316 | |
| 317 | int wanrouter_encapsulate(struct sk_buff *skb, struct net_device *dev, |
| 318 | unsigned short type) |
| 319 | { |
| 320 | int hdr_len = 0; |
| 321 | |
| 322 | switch (type) { |
| 323 | case ETH_P_IP: /* IP datagram encapsulation */ |
| 324 | hdr_len += 1; |
| 325 | skb_push(skb, 1); |
| 326 | skb->data[0] = NLPID_IP; |
| 327 | break; |
| 328 | |
| 329 | case ETH_P_IPX: /* SNAP encapsulation */ |
| 330 | case ETH_P_ARP: |
| 331 | hdr_len += 7; |
| 332 | skb_push(skb, 7); |
| 333 | skb->data[0] = 0; |
| 334 | skb->data[1] = NLPID_SNAP; |
| 335 | memcpy(&skb->data[2], wanrouter_oui_ether, |
| 336 | sizeof(wanrouter_oui_ether)); |
| 337 | *((unsigned short*)&skb->data[5]) = htons(type); |
| 338 | break; |
| 339 | |
| 340 | default: /* Unknown packet type */ |
| 341 | printk(KERN_INFO |
| 342 | "%s: unsupported Ethertype 0x%04X on interface %s!\n", |
| 343 | wanrouter_modname, type, dev->name); |
| 344 | hdr_len = -EINVAL; |
| 345 | } |
| 346 | return hdr_len; |
| 347 | } |
| 348 | |
| 349 | |
| 350 | /* |
| 351 | * Decapsulate packet. |
| 352 | * |
| 353 | * Return: Ethertype (in network order) |
| 354 | * 0 unknown encapsulation |
| 355 | * |
| 356 | * Notes: |
| 357 | * 1. This function may be called on interrupt context. |
| 358 | */ |
| 359 | |
| 360 | |
Alexey Dobriyan | ab61148 | 2005-07-12 12:08:43 -0700 | [diff] [blame] | 361 | __be16 wanrouter_type_trans(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | { |
| 363 | int cnt = skb->data[0] ? 0 : 1; /* there may be a pad present */ |
Alexey Dobriyan | ab61148 | 2005-07-12 12:08:43 -0700 | [diff] [blame] | 364 | __be16 ethertype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
| 366 | switch (skb->data[cnt]) { |
| 367 | case NLPID_IP: /* IP datagramm */ |
| 368 | ethertype = htons(ETH_P_IP); |
| 369 | cnt += 1; |
| 370 | break; |
| 371 | |
| 372 | case NLPID_SNAP: /* SNAP encapsulation */ |
| 373 | if (memcmp(&skb->data[cnt + 1], wanrouter_oui_ether, |
| 374 | sizeof(wanrouter_oui_ether))){ |
| 375 | printk(KERN_INFO |
| 376 | "%s: unsupported SNAP OUI %02X-%02X-%02X " |
| 377 | "on interface %s!\n", wanrouter_modname, |
| 378 | skb->data[cnt+1], skb->data[cnt+2], |
| 379 | skb->data[cnt+3], dev->name); |
| 380 | return 0; |
| 381 | } |
Alexey Dobriyan | ab61148 | 2005-07-12 12:08:43 -0700 | [diff] [blame] | 382 | ethertype = *((__be16*)&skb->data[cnt+4]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | cnt += 6; |
| 384 | break; |
| 385 | |
| 386 | /* add other protocols, e.g. CLNP, ESIS, ISIS, if needed */ |
| 387 | |
| 388 | default: |
| 389 | printk(KERN_INFO |
| 390 | "%s: unsupported NLPID 0x%02X on interface %s!\n", |
| 391 | wanrouter_modname, skb->data[cnt], dev->name); |
| 392 | return 0; |
| 393 | } |
| 394 | skb->protocol = ethertype; |
| 395 | skb->pkt_type = PACKET_HOST; /* Physically point to point */ |
| 396 | skb_pull(skb, cnt); |
| 397 | skb->mac.raw = skb->data; |
| 398 | return ethertype; |
| 399 | } |
| 400 | |
| 401 | |
| 402 | /* |
| 403 | * WAN device IOCTL. |
| 404 | * o find WAN device associated with this node |
| 405 | * o execute requested action or pass command to the device driver |
| 406 | */ |
| 407 | |
| 408 | int wanrouter_ioctl(struct inode *inode, struct file *file, |
| 409 | unsigned int cmd, unsigned long arg) |
| 410 | { |
| 411 | int err = 0; |
| 412 | struct proc_dir_entry *dent; |
| 413 | struct wan_device *wandev; |
| 414 | void __user *data = (void __user *)arg; |
| 415 | |
| 416 | if (!capable(CAP_NET_ADMIN)) |
| 417 | return -EPERM; |
| 418 | |
| 419 | if ((cmd >> 8) != ROUTER_IOCTL) |
| 420 | return -EINVAL; |
| 421 | |
| 422 | dent = PDE(inode); |
| 423 | if ((dent == NULL) || (dent->data == NULL)) |
| 424 | return -EINVAL; |
| 425 | |
| 426 | wandev = dent->data; |
| 427 | if (wandev->magic != ROUTER_MAGIC) |
| 428 | return -EINVAL; |
| 429 | |
| 430 | switch (cmd) { |
| 431 | case ROUTER_SETUP: |
| 432 | err = wanrouter_device_setup(wandev, data); |
| 433 | break; |
| 434 | |
| 435 | case ROUTER_DOWN: |
| 436 | err = wanrouter_device_shutdown(wandev); |
| 437 | break; |
| 438 | |
| 439 | case ROUTER_STAT: |
| 440 | err = wanrouter_device_stat(wandev, data); |
| 441 | break; |
| 442 | |
| 443 | case ROUTER_IFNEW: |
| 444 | err = wanrouter_device_new_if(wandev, data); |
| 445 | break; |
| 446 | |
| 447 | case ROUTER_IFDEL: |
| 448 | err = wanrouter_device_del_if(wandev, data); |
| 449 | break; |
| 450 | |
| 451 | case ROUTER_IFSTAT: |
| 452 | break; |
| 453 | |
| 454 | default: |
| 455 | if ((cmd >= ROUTER_USER) && |
| 456 | (cmd <= ROUTER_USER_MAX) && |
| 457 | wandev->ioctl) |
| 458 | err = wandev->ioctl(wandev, cmd, arg); |
| 459 | else err = -EINVAL; |
| 460 | } |
| 461 | return err; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * WAN Driver IOCTL Handlers |
| 466 | */ |
| 467 | |
| 468 | /* |
| 469 | * Setup WAN link device. |
| 470 | * o verify user address space |
| 471 | * o allocate kernel memory and copy configuration data to kernel space |
| 472 | * o if configuration data includes extension, copy it to kernel space too |
| 473 | * o call driver's setup() entry point |
| 474 | */ |
| 475 | |
| 476 | static int wanrouter_device_setup(struct wan_device *wandev, |
| 477 | wandev_conf_t __user *u_conf) |
| 478 | { |
| 479 | void *data = NULL; |
| 480 | wandev_conf_t *conf; |
| 481 | int err = -EINVAL; |
| 482 | |
| 483 | if (wandev->setup == NULL) { /* Nothing to do ? */ |
| 484 | printk(KERN_INFO "%s: ERROR, No setup script: wandev->setup()\n", |
| 485 | wandev->name); |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | conf = kmalloc(sizeof(wandev_conf_t), GFP_KERNEL); |
| 490 | if (conf == NULL){ |
| 491 | printk(KERN_INFO "%s: ERROR, Failed to allocate kernel memory !\n", |
| 492 | wandev->name); |
| 493 | return -ENOBUFS; |
| 494 | } |
| 495 | |
| 496 | if (copy_from_user(conf, u_conf, sizeof(wandev_conf_t))) { |
| 497 | printk(KERN_INFO "%s: Failed to copy user config data to kernel space!\n", |
| 498 | wandev->name); |
| 499 | kfree(conf); |
| 500 | return -EFAULT; |
| 501 | } |
| 502 | |
| 503 | if (conf->magic != ROUTER_MAGIC) { |
| 504 | kfree(conf); |
| 505 | printk(KERN_INFO "%s: ERROR, Invalid MAGIC Number\n", |
| 506 | wandev->name); |
| 507 | return -EINVAL; |
| 508 | } |
| 509 | |
| 510 | if (conf->data_size && conf->data) { |
| 511 | if (conf->data_size > 128000 || conf->data_size < 0) { |
| 512 | printk(KERN_INFO |
| 513 | "%s: ERROR, Invalid firmware data size %i !\n", |
| 514 | wandev->name, conf->data_size); |
| 515 | kfree(conf); |
| 516 | return -EINVAL; |
| 517 | } |
| 518 | |
| 519 | data = vmalloc(conf->data_size); |
| 520 | if (!data) { |
| 521 | printk(KERN_INFO |
| 522 | "%s: ERROR, Faild allocate kernel memory !\n", |
| 523 | wandev->name); |
| 524 | kfree(conf); |
| 525 | return -ENOBUFS; |
| 526 | } |
| 527 | if (!copy_from_user(data, conf->data, conf->data_size)) { |
| 528 | conf->data = data; |
| 529 | err = wandev->setup(wandev, conf); |
| 530 | } else { |
| 531 | printk(KERN_INFO |
| 532 | "%s: ERROR, Faild to copy from user data !\n", |
| 533 | wandev->name); |
| 534 | err = -EFAULT; |
| 535 | } |
| 536 | vfree(data); |
| 537 | } else { |
| 538 | printk(KERN_INFO |
| 539 | "%s: ERROR, No firmware found ! Firmware size = %i !\n", |
| 540 | wandev->name, conf->data_size); |
| 541 | } |
| 542 | |
| 543 | kfree(conf); |
| 544 | return err; |
| 545 | } |
| 546 | |
| 547 | /* |
| 548 | * Shutdown WAN device. |
| 549 | * o delete all not opened logical channels for this device |
| 550 | * o call driver's shutdown() entry point |
| 551 | */ |
| 552 | |
| 553 | static int wanrouter_device_shutdown(struct wan_device *wandev) |
| 554 | { |
| 555 | struct net_device *dev; |
| 556 | int err=0; |
| 557 | |
| 558 | if (wandev->state == WAN_UNCONFIGURED) |
| 559 | return 0; |
| 560 | |
| 561 | printk(KERN_INFO "\n%s: Shutting Down!\n",wandev->name); |
| 562 | |
| 563 | for (dev = wandev->dev; dev;) { |
| 564 | err = wanrouter_delete_interface(wandev, dev->name); |
| 565 | if (err) |
| 566 | return err; |
| 567 | /* The above function deallocates the current dev |
| 568 | * structure. Therefore, we cannot use dev->priv |
| 569 | * as the next element: wandev->dev points to the |
| 570 | * next element */ |
| 571 | dev = wandev->dev; |
| 572 | } |
| 573 | |
| 574 | if (wandev->ndev) |
| 575 | return -EBUSY; /* there are opened interfaces */ |
| 576 | |
| 577 | if (wandev->shutdown) |
| 578 | err=wandev->shutdown(wandev); |
| 579 | |
| 580 | return err; |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Get WAN device status & statistics. |
| 585 | */ |
| 586 | |
| 587 | static int wanrouter_device_stat(struct wan_device *wandev, |
| 588 | wandev_stat_t __user *u_stat) |
| 589 | { |
| 590 | wandev_stat_t stat; |
| 591 | |
| 592 | memset(&stat, 0, sizeof(stat)); |
| 593 | |
| 594 | /* Ask device driver to update device statistics */ |
| 595 | if ((wandev->state != WAN_UNCONFIGURED) && wandev->update) |
| 596 | wandev->update(wandev); |
| 597 | |
| 598 | /* Fill out structure */ |
| 599 | stat.ndev = wandev->ndev; |
| 600 | stat.state = wandev->state; |
| 601 | |
| 602 | if (copy_to_user(u_stat, &stat, sizeof(stat))) |
| 603 | return -EFAULT; |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * Create new WAN interface. |
| 610 | * o verify user address space |
| 611 | * o copy configuration data to kernel address space |
| 612 | * o allocate network interface data space |
| 613 | * o call driver's new_if() entry point |
| 614 | * o make sure there is no interface name conflict |
| 615 | * o register network interface |
| 616 | */ |
| 617 | |
| 618 | static int wanrouter_device_new_if(struct wan_device *wandev, |
| 619 | wanif_conf_t __user *u_conf) |
| 620 | { |
| 621 | wanif_conf_t *cnf; |
| 622 | struct net_device *dev = NULL; |
| 623 | #ifdef CONFIG_WANPIPE_MULTPPP |
| 624 | struct ppp_device *pppdev=NULL; |
| 625 | #endif |
| 626 | int err; |
| 627 | |
| 628 | if ((wandev->state == WAN_UNCONFIGURED) || (wandev->new_if == NULL)) |
| 629 | return -ENODEV; |
| 630 | |
| 631 | cnf = kmalloc(sizeof(wanif_conf_t), GFP_KERNEL); |
| 632 | if (!cnf) |
| 633 | return -ENOBUFS; |
| 634 | |
| 635 | err = -EFAULT; |
| 636 | if (copy_from_user(cnf, u_conf, sizeof(wanif_conf_t))) |
| 637 | goto out; |
| 638 | |
| 639 | err = -EINVAL; |
| 640 | if (cnf->magic != ROUTER_MAGIC) |
| 641 | goto out; |
| 642 | |
| 643 | if (cnf->config_id == WANCONFIG_MPPP) { |
| 644 | #ifdef CONFIG_WANPIPE_MULTPPP |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 645 | pppdev = kzalloc(sizeof(struct ppp_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | err = -ENOBUFS; |
| 647 | if (pppdev == NULL) |
| 648 | goto out; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 649 | pppdev->dev = kzalloc(sizeof(struct net_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | if (pppdev->dev == NULL) { |
| 651 | kfree(pppdev); |
| 652 | err = -ENOBUFS; |
| 653 | goto out; |
| 654 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | err = wandev->new_if(wandev, (struct net_device *)pppdev, cnf); |
| 656 | dev = pppdev->dev; |
| 657 | #else |
| 658 | printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!\n", |
| 659 | wandev->name); |
| 660 | err = -EPROTONOSUPPORT; |
| 661 | goto out; |
| 662 | #endif |
| 663 | } else { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 664 | dev = kzalloc(sizeof(struct net_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | err = -ENOBUFS; |
| 666 | if (dev == NULL) |
| 667 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | err = wandev->new_if(wandev, dev, cnf); |
| 669 | } |
| 670 | |
| 671 | if (!err) { |
| 672 | /* Register network interface. This will invoke init() |
| 673 | * function supplied by the driver. If device registered |
| 674 | * successfully, add it to the interface list. |
| 675 | */ |
| 676 | |
| 677 | if (dev->name == NULL) { |
| 678 | err = -EINVAL; |
| 679 | } else { |
| 680 | |
| 681 | #ifdef WANDEBUG |
| 682 | printk(KERN_INFO "%s: registering interface %s...\n", |
| 683 | wanrouter_modname, dev->name); |
| 684 | #endif |
| 685 | |
| 686 | err = register_netdev(dev); |
| 687 | if (!err) { |
| 688 | struct net_device *slave = NULL; |
| 689 | unsigned long smp_flags=0; |
| 690 | |
| 691 | lock_adapter_irq(&wandev->lock, &smp_flags); |
| 692 | |
| 693 | if (wandev->dev == NULL) { |
| 694 | wandev->dev = dev; |
| 695 | } else { |
| 696 | for (slave=wandev->dev; |
| 697 | *((struct net_device **)slave->priv); |
| 698 | slave = *((struct net_device **)slave->priv)); |
| 699 | |
| 700 | *((struct net_device **)slave->priv) = dev; |
| 701 | } |
| 702 | ++wandev->ndev; |
| 703 | |
| 704 | unlock_adapter_irq(&wandev->lock, &smp_flags); |
| 705 | err = 0; /* done !!! */ |
| 706 | goto out; |
| 707 | } |
| 708 | } |
| 709 | if (wandev->del_if) |
| 710 | wandev->del_if(wandev, dev); |
| 711 | } |
| 712 | |
| 713 | /* This code has moved from del_if() function */ |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 714 | kfree(dev->priv); |
| 715 | dev->priv = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | #ifdef CONFIG_WANPIPE_MULTPPP |
| 718 | if (cnf->config_id == WANCONFIG_MPPP) |
| 719 | kfree(pppdev); |
| 720 | else |
| 721 | kfree(dev); |
| 722 | #else |
| 723 | /* Sync PPP is disabled */ |
| 724 | if (cnf->config_id != WANCONFIG_MPPP) |
| 725 | kfree(dev); |
| 726 | #endif |
| 727 | |
| 728 | out: |
| 729 | kfree(cnf); |
| 730 | return err; |
| 731 | } |
| 732 | |
| 733 | |
| 734 | /* |
| 735 | * Delete WAN logical channel. |
| 736 | * o verify user address space |
| 737 | * o copy configuration data to kernel address space |
| 738 | */ |
| 739 | |
| 740 | static int wanrouter_device_del_if(struct wan_device *wandev, char __user *u_name) |
| 741 | { |
| 742 | char name[WAN_IFNAME_SZ + 1]; |
| 743 | int err = 0; |
| 744 | |
| 745 | if (wandev->state == WAN_UNCONFIGURED) |
| 746 | return -ENODEV; |
| 747 | |
| 748 | memset(name, 0, sizeof(name)); |
| 749 | |
| 750 | if (copy_from_user(name, u_name, WAN_IFNAME_SZ)) |
| 751 | return -EFAULT; |
| 752 | |
| 753 | err = wanrouter_delete_interface(wandev, name); |
| 754 | if (err) |
| 755 | return err; |
| 756 | |
| 757 | /* If last interface being deleted, shutdown card |
| 758 | * This helps with administration at leaf nodes |
| 759 | * (You can tell if the person at the other end of the phone |
| 760 | * has an interface configured) and avoids DoS vulnerabilities |
| 761 | * in binary driver files - this fixes a problem with the current |
| 762 | * Sangoma driver going into strange states when all the network |
| 763 | * interfaces are deleted and the link irrecoverably disconnected. |
| 764 | */ |
| 765 | |
| 766 | if (!wandev->ndev && wandev->shutdown) |
| 767 | err = wandev->shutdown(wandev); |
| 768 | |
| 769 | return err; |
| 770 | } |
| 771 | |
| 772 | /* |
| 773 | * Miscellaneous Functions |
| 774 | */ |
| 775 | |
| 776 | /* |
| 777 | * Find WAN device by name. |
| 778 | * Return pointer to the WAN device data space or NULL if device not found. |
| 779 | */ |
| 780 | |
| 781 | static struct wan_device *wanrouter_find_device(char *name) |
| 782 | { |
| 783 | struct wan_device *wandev; |
| 784 | |
| 785 | for (wandev = wanrouter_router_devlist; |
| 786 | wandev && strcmp(wandev->name, name); |
| 787 | wandev = wandev->next); |
| 788 | return wandev; |
| 789 | } |
| 790 | |
| 791 | /* |
| 792 | * Delete WAN logical channel identified by its name. |
| 793 | * o find logical channel by its name |
| 794 | * o call driver's del_if() entry point |
| 795 | * o unregister network interface |
| 796 | * o unlink channel data space from linked list of channels |
| 797 | * o release channel data space |
| 798 | * |
| 799 | * Return: 0 success |
| 800 | * -ENODEV channel not found. |
| 801 | * -EBUSY interface is open |
| 802 | * |
| 803 | * Note: If (force != 0), then device will be destroyed even if interface |
| 804 | * associated with it is open. It's caller's responsibility to make |
| 805 | * sure that opened interfaces are not removed! |
| 806 | */ |
| 807 | |
| 808 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name) |
| 809 | { |
| 810 | struct net_device *dev = NULL, *prev = NULL; |
| 811 | unsigned long smp_flags=0; |
| 812 | |
| 813 | lock_adapter_irq(&wandev->lock, &smp_flags); |
| 814 | dev = wandev->dev; |
| 815 | prev = NULL; |
| 816 | while (dev && strcmp(name, dev->name)) { |
| 817 | struct net_device **slave = dev->priv; |
| 818 | prev = dev; |
| 819 | dev = *slave; |
| 820 | } |
| 821 | unlock_adapter_irq(&wandev->lock, &smp_flags); |
| 822 | |
| 823 | if (dev == NULL) |
| 824 | return -ENODEV; /* interface not found */ |
| 825 | |
| 826 | if (netif_running(dev)) |
| 827 | return -EBUSY; /* interface in use */ |
| 828 | |
| 829 | if (wandev->del_if) |
| 830 | wandev->del_if(wandev, dev); |
| 831 | |
| 832 | lock_adapter_irq(&wandev->lock, &smp_flags); |
| 833 | if (prev) { |
| 834 | struct net_device **prev_slave = prev->priv; |
| 835 | struct net_device **slave = dev->priv; |
| 836 | |
| 837 | *prev_slave = *slave; |
| 838 | } else { |
| 839 | struct net_device **slave = dev->priv; |
| 840 | wandev->dev = *slave; |
| 841 | } |
| 842 | --wandev->ndev; |
| 843 | unlock_adapter_irq(&wandev->lock, &smp_flags); |
| 844 | |
| 845 | printk(KERN_INFO "%s: unregistering '%s'\n", wandev->name, dev->name); |
| 846 | |
| 847 | /* Due to new interface linking method using dev->priv, |
| 848 | * this code has moved from del_if() function.*/ |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 849 | kfree(dev->priv); |
| 850 | dev->priv=NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
| 852 | unregister_netdev(dev); |
| 853 | |
| 854 | free_netdev(dev); |
| 855 | |
| 856 | return 0; |
| 857 | } |
| 858 | |
| 859 | void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
| 860 | { |
| 861 | spin_lock_irqsave(lock, *smp_flags); |
| 862 | } |
| 863 | |
| 864 | |
| 865 | void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
| 866 | { |
| 867 | spin_unlock_irqrestore(lock, *smp_flags); |
| 868 | } |
| 869 | |
| 870 | EXPORT_SYMBOL(register_wan_device); |
| 871 | EXPORT_SYMBOL(unregister_wan_device); |
| 872 | EXPORT_SYMBOL(wanrouter_encapsulate); |
| 873 | EXPORT_SYMBOL(wanrouter_type_trans); |
| 874 | EXPORT_SYMBOL(lock_adapter_irq); |
| 875 | EXPORT_SYMBOL(unlock_adapter_irq); |
| 876 | |
| 877 | MODULE_LICENSE("GPL"); |
| 878 | |
| 879 | /* |
| 880 | * End |
| 881 | */ |