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: |
Matt LaPlante | 0779bf2 | 2006-11-30 05:24:39 +0100 | [diff] [blame] | 6 | * o WAN device management (registering, unregistering) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/module.h> /* support for loadable modules */ |
Jesper Juhl | e49332b | 2005-05-01 08:59:08 -0700 | [diff] [blame] | 50 | #include <linux/slab.h> /* kmalloc(), kfree() */ |
| 51 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | #define KMEM_SAFETYZONE 8 |
| 62 | |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 63 | #define DEV_TO_SLAVE(dev) (*((struct net_device **)netdev_priv(dev))) |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Adrian Bunk | 97353cb | 2007-02-05 18:07:27 -0800 | [diff] [blame] | 89 | static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags); |
| 90 | static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | |
| 93 | |
| 94 | /* |
| 95 | * Global Data |
| 96 | */ |
| 97 | |
| 98 | static char wanrouter_fullname[] = "Sangoma WANPIPE Router"; |
| 99 | static char wanrouter_copyright[] = "(c) 1995-2000 Sangoma Technologies Inc."; |
| 100 | static char wanrouter_modname[] = ROUTER_NAME; /* short module name */ |
| 101 | struct wan_device* wanrouter_router_devlist; /* list of registered devices */ |
| 102 | |
| 103 | /* |
| 104 | * Organize Unique Identifiers for encapsulation/decapsulation |
| 105 | */ |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | #if 0 |
Adrian Bunk | 97353cb | 2007-02-05 18:07:27 -0800 | [diff] [blame] | 108 | static unsigned char wanrouter_oui_ether[] = { 0x00, 0x00, 0x00 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | static unsigned char wanrouter_oui_802_2[] = { 0x00, 0x80, 0xC2 }; |
| 110 | #endif |
| 111 | |
| 112 | static int __init wanrouter_init(void) |
| 113 | { |
| 114 | int err; |
| 115 | |
| 116 | printk(KERN_INFO "%s v%u.%u %s\n", |
| 117 | wanrouter_fullname, ROUTER_VERSION, ROUTER_RELEASE, |
| 118 | wanrouter_copyright); |
| 119 | |
| 120 | err = wanrouter_proc_init(); |
| 121 | if (err) |
| 122 | printk(KERN_INFO "%s: can't create entry in proc filesystem!\n", |
| 123 | wanrouter_modname); |
| 124 | |
| 125 | return err; |
| 126 | } |
| 127 | |
| 128 | static void __exit wanrouter_cleanup (void) |
| 129 | { |
| 130 | wanrouter_proc_cleanup(); |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * This is just plain dumb. We should move the bugger to drivers/net/wan, |
| 135 | * slap it first in directory and make it module_init(). The only reason |
| 136 | * for subsys_initcall() here is that net goes after drivers (why, BTW?) |
| 137 | */ |
| 138 | subsys_initcall(wanrouter_init); |
| 139 | module_exit(wanrouter_cleanup); |
| 140 | |
| 141 | /* |
| 142 | * Kernel APIs |
| 143 | */ |
| 144 | |
| 145 | /* |
| 146 | * Register WAN device. |
| 147 | * o verify device credentials |
| 148 | * o create an entry for the device in the /proc/net/router directory |
| 149 | * o initialize internally maintained fields of the wan_device structure |
| 150 | * o link device data space to a singly-linked list |
| 151 | * o if it's the first device, then start kernel 'thread' |
| 152 | * o increment module use count |
| 153 | * |
| 154 | * Return: |
| 155 | * 0 Ok |
| 156 | * < 0 error. |
| 157 | * |
| 158 | * Context: process |
| 159 | */ |
| 160 | |
| 161 | |
| 162 | int register_wan_device(struct wan_device *wandev) |
| 163 | { |
| 164 | int err, namelen; |
| 165 | |
| 166 | if ((wandev == NULL) || (wandev->magic != ROUTER_MAGIC) || |
| 167 | (wandev->name == NULL)) |
| 168 | return -EINVAL; |
| 169 | |
| 170 | namelen = strlen(wandev->name); |
| 171 | if (!namelen || (namelen > WAN_DRVNAME_SZ)) |
| 172 | return -EINVAL; |
| 173 | |
| 174 | if (wanrouter_find_device(wandev->name)) |
| 175 | return -EEXIST; |
| 176 | |
| 177 | #ifdef WANDEBUG |
| 178 | printk(KERN_INFO "%s: registering WAN device %s\n", |
| 179 | wanrouter_modname, wandev->name); |
| 180 | #endif |
| 181 | |
| 182 | /* |
| 183 | * Register /proc directory entry |
| 184 | */ |
| 185 | err = wanrouter_proc_add(wandev); |
| 186 | if (err) { |
| 187 | printk(KERN_INFO |
| 188 | "%s: can't create /proc/net/router/%s entry!\n", |
| 189 | wanrouter_modname, wandev->name); |
| 190 | return err; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Initialize fields of the wan_device structure maintained by the |
| 195 | * router and update local data. |
| 196 | */ |
| 197 | |
| 198 | wandev->ndev = 0; |
| 199 | wandev->dev = NULL; |
| 200 | wandev->next = wanrouter_router_devlist; |
| 201 | wanrouter_router_devlist = wandev; |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Unregister WAN device. |
| 207 | * o shut down device |
| 208 | * o unlink device data space from the linked list |
| 209 | * o delete device entry in the /proc/net/router directory |
| 210 | * o decrement module use count |
| 211 | * |
| 212 | * Return: 0 Ok |
| 213 | * <0 error. |
| 214 | * Context: process |
| 215 | */ |
| 216 | |
| 217 | |
| 218 | int unregister_wan_device(char *name) |
| 219 | { |
| 220 | struct wan_device *wandev, *prev; |
| 221 | |
| 222 | if (name == NULL) |
| 223 | return -EINVAL; |
| 224 | |
| 225 | for (wandev = wanrouter_router_devlist, prev = NULL; |
| 226 | wandev && strcmp(wandev->name, name); |
| 227 | prev = wandev, wandev = wandev->next) |
| 228 | ; |
| 229 | if (wandev == NULL) |
| 230 | return -ENODEV; |
| 231 | |
| 232 | #ifdef WANDEBUG |
| 233 | printk(KERN_INFO "%s: unregistering WAN device %s\n", |
| 234 | wanrouter_modname, name); |
| 235 | #endif |
| 236 | |
| 237 | if (wandev->state != WAN_UNCONFIGURED) |
| 238 | wanrouter_device_shutdown(wandev); |
| 239 | |
| 240 | if (prev) |
| 241 | prev->next = wandev->next; |
| 242 | else |
| 243 | wanrouter_router_devlist = wandev->next; |
| 244 | |
| 245 | wanrouter_proc_delete(wandev); |
| 246 | return 0; |
| 247 | } |
| 248 | |
Adrian Bunk | 97353cb | 2007-02-05 18:07:27 -0800 | [diff] [blame] | 249 | #if 0 |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | /* |
| 252 | * Encapsulate packet. |
| 253 | * |
| 254 | * Return: encapsulation header size |
| 255 | * < 0 - unsupported Ethertype |
| 256 | * |
| 257 | * Notes: |
| 258 | * 1. This function may be called on interrupt context. |
| 259 | */ |
| 260 | |
| 261 | |
| 262 | int wanrouter_encapsulate(struct sk_buff *skb, struct net_device *dev, |
| 263 | unsigned short type) |
| 264 | { |
| 265 | int hdr_len = 0; |
| 266 | |
| 267 | switch (type) { |
| 268 | case ETH_P_IP: /* IP datagram encapsulation */ |
| 269 | hdr_len += 1; |
| 270 | skb_push(skb, 1); |
| 271 | skb->data[0] = NLPID_IP; |
| 272 | break; |
| 273 | |
| 274 | case ETH_P_IPX: /* SNAP encapsulation */ |
| 275 | case ETH_P_ARP: |
| 276 | hdr_len += 7; |
| 277 | skb_push(skb, 7); |
| 278 | skb->data[0] = 0; |
| 279 | skb->data[1] = NLPID_SNAP; |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 280 | skb_copy_to_linear_data_offset(skb, 2, wanrouter_oui_ether, |
| 281 | sizeof(wanrouter_oui_ether)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | *((unsigned short*)&skb->data[5]) = htons(type); |
| 283 | break; |
| 284 | |
| 285 | default: /* Unknown packet type */ |
| 286 | printk(KERN_INFO |
| 287 | "%s: unsupported Ethertype 0x%04X on interface %s!\n", |
| 288 | wanrouter_modname, type, dev->name); |
| 289 | hdr_len = -EINVAL; |
| 290 | } |
| 291 | return hdr_len; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | /* |
| 296 | * Decapsulate packet. |
| 297 | * |
| 298 | * Return: Ethertype (in network order) |
| 299 | * 0 unknown encapsulation |
| 300 | * |
| 301 | * Notes: |
| 302 | * 1. This function may be called on interrupt context. |
| 303 | */ |
| 304 | |
| 305 | |
Alexey Dobriyan | ab61148 | 2005-07-12 12:08:43 -0700 | [diff] [blame] | 306 | __be16 wanrouter_type_trans(struct sk_buff *skb, struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
| 308 | 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] | 309 | __be16 ethertype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
| 311 | switch (skb->data[cnt]) { |
| 312 | case NLPID_IP: /* IP datagramm */ |
| 313 | ethertype = htons(ETH_P_IP); |
| 314 | cnt += 1; |
| 315 | break; |
| 316 | |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 317 | case NLPID_SNAP: /* SNAP encapsulation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | if (memcmp(&skb->data[cnt + 1], wanrouter_oui_ether, |
| 319 | sizeof(wanrouter_oui_ether))){ |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 320 | printk(KERN_INFO |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | "%s: unsupported SNAP OUI %02X-%02X-%02X " |
| 322 | "on interface %s!\n", wanrouter_modname, |
| 323 | skb->data[cnt+1], skb->data[cnt+2], |
| 324 | skb->data[cnt+3], dev->name); |
| 325 | return 0; |
| 326 | } |
Alexey Dobriyan | ab61148 | 2005-07-12 12:08:43 -0700 | [diff] [blame] | 327 | ethertype = *((__be16*)&skb->data[cnt+4]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | cnt += 6; |
| 329 | break; |
| 330 | |
| 331 | /* add other protocols, e.g. CLNP, ESIS, ISIS, if needed */ |
| 332 | |
| 333 | default: |
| 334 | printk(KERN_INFO |
| 335 | "%s: unsupported NLPID 0x%02X on interface %s!\n", |
| 336 | wanrouter_modname, skb->data[cnt], dev->name); |
| 337 | return 0; |
| 338 | } |
| 339 | skb->protocol = ethertype; |
| 340 | skb->pkt_type = PACKET_HOST; /* Physically point to point */ |
| 341 | skb_pull(skb, cnt); |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 342 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | return ethertype; |
| 344 | } |
| 345 | |
Adrian Bunk | 97353cb | 2007-02-05 18:07:27 -0800 | [diff] [blame] | 346 | #endif /* 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | /* |
| 349 | * WAN device IOCTL. |
| 350 | * o find WAN device associated with this node |
| 351 | * o execute requested action or pass command to the device driver |
| 352 | */ |
| 353 | |
Alan Cox | 866988e | 2008-05-25 23:41:40 -0700 | [diff] [blame] | 354 | long wanrouter_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
Alan Cox | 866988e | 2008-05-25 23:41:40 -0700 | [diff] [blame] | 356 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | int err = 0; |
| 358 | struct proc_dir_entry *dent; |
| 359 | struct wan_device *wandev; |
| 360 | void __user *data = (void __user *)arg; |
| 361 | |
| 362 | if (!capable(CAP_NET_ADMIN)) |
| 363 | return -EPERM; |
| 364 | |
| 365 | if ((cmd >> 8) != ROUTER_IOCTL) |
| 366 | return -EINVAL; |
| 367 | |
| 368 | dent = PDE(inode); |
| 369 | if ((dent == NULL) || (dent->data == NULL)) |
| 370 | return -EINVAL; |
| 371 | |
| 372 | wandev = dent->data; |
| 373 | if (wandev->magic != ROUTER_MAGIC) |
| 374 | return -EINVAL; |
| 375 | |
Alan Cox | 866988e | 2008-05-25 23:41:40 -0700 | [diff] [blame] | 376 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | switch (cmd) { |
| 378 | case ROUTER_SETUP: |
| 379 | err = wanrouter_device_setup(wandev, data); |
| 380 | break; |
| 381 | |
| 382 | case ROUTER_DOWN: |
| 383 | err = wanrouter_device_shutdown(wandev); |
| 384 | break; |
| 385 | |
| 386 | case ROUTER_STAT: |
| 387 | err = wanrouter_device_stat(wandev, data); |
| 388 | break; |
| 389 | |
| 390 | case ROUTER_IFNEW: |
| 391 | err = wanrouter_device_new_if(wandev, data); |
| 392 | break; |
| 393 | |
| 394 | case ROUTER_IFDEL: |
| 395 | err = wanrouter_device_del_if(wandev, data); |
| 396 | break; |
| 397 | |
| 398 | case ROUTER_IFSTAT: |
| 399 | break; |
| 400 | |
| 401 | default: |
| 402 | if ((cmd >= ROUTER_USER) && |
| 403 | (cmd <= ROUTER_USER_MAX) && |
| 404 | wandev->ioctl) |
| 405 | err = wandev->ioctl(wandev, cmd, arg); |
| 406 | else err = -EINVAL; |
| 407 | } |
Alan Cox | 866988e | 2008-05-25 23:41:40 -0700 | [diff] [blame] | 408 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | return err; |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * WAN Driver IOCTL Handlers |
| 414 | */ |
| 415 | |
| 416 | /* |
| 417 | * Setup WAN link device. |
| 418 | * o verify user address space |
| 419 | * o allocate kernel memory and copy configuration data to kernel space |
| 420 | * o if configuration data includes extension, copy it to kernel space too |
| 421 | * o call driver's setup() entry point |
| 422 | */ |
| 423 | |
| 424 | static int wanrouter_device_setup(struct wan_device *wandev, |
| 425 | wandev_conf_t __user *u_conf) |
| 426 | { |
| 427 | void *data = NULL; |
| 428 | wandev_conf_t *conf; |
| 429 | int err = -EINVAL; |
| 430 | |
| 431 | if (wandev->setup == NULL) { /* Nothing to do ? */ |
| 432 | printk(KERN_INFO "%s: ERROR, No setup script: wandev->setup()\n", |
| 433 | wandev->name); |
| 434 | return 0; |
| 435 | } |
| 436 | |
| 437 | conf = kmalloc(sizeof(wandev_conf_t), GFP_KERNEL); |
| 438 | if (conf == NULL){ |
| 439 | printk(KERN_INFO "%s: ERROR, Failed to allocate kernel memory !\n", |
| 440 | wandev->name); |
| 441 | return -ENOBUFS; |
| 442 | } |
| 443 | |
| 444 | if (copy_from_user(conf, u_conf, sizeof(wandev_conf_t))) { |
| 445 | printk(KERN_INFO "%s: Failed to copy user config data to kernel space!\n", |
| 446 | wandev->name); |
| 447 | kfree(conf); |
| 448 | return -EFAULT; |
| 449 | } |
| 450 | |
| 451 | if (conf->magic != ROUTER_MAGIC) { |
| 452 | kfree(conf); |
| 453 | printk(KERN_INFO "%s: ERROR, Invalid MAGIC Number\n", |
| 454 | wandev->name); |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 455 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | if (conf->data_size && conf->data) { |
Bill Nottingham | 75202e7 | 2007-05-31 21:33:35 -0700 | [diff] [blame] | 459 | if (conf->data_size > 128000) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | printk(KERN_INFO |
| 461 | "%s: ERROR, Invalid firmware data size %i !\n", |
| 462 | wandev->name, conf->data_size); |
| 463 | kfree(conf); |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 464 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | } |
| 466 | |
| 467 | data = vmalloc(conf->data_size); |
| 468 | if (!data) { |
| 469 | printk(KERN_INFO |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 470 | "%s: ERROR, Faild allocate kernel memory !\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | wandev->name); |
| 472 | kfree(conf); |
| 473 | return -ENOBUFS; |
| 474 | } |
| 475 | if (!copy_from_user(data, conf->data, conf->data_size)) { |
| 476 | conf->data = data; |
| 477 | err = wandev->setup(wandev, conf); |
| 478 | } else { |
| 479 | printk(KERN_INFO |
| 480 | "%s: ERROR, Faild to copy from user data !\n", |
| 481 | wandev->name); |
| 482 | err = -EFAULT; |
| 483 | } |
| 484 | vfree(data); |
| 485 | } else { |
| 486 | printk(KERN_INFO |
| 487 | "%s: ERROR, No firmware found ! Firmware size = %i !\n", |
| 488 | wandev->name, conf->data_size); |
| 489 | } |
| 490 | |
| 491 | kfree(conf); |
| 492 | return err; |
| 493 | } |
| 494 | |
| 495 | /* |
| 496 | * Shutdown WAN device. |
| 497 | * o delete all not opened logical channels for this device |
| 498 | * o call driver's shutdown() entry point |
| 499 | */ |
| 500 | |
| 501 | static int wanrouter_device_shutdown(struct wan_device *wandev) |
| 502 | { |
| 503 | struct net_device *dev; |
| 504 | int err=0; |
| 505 | |
| 506 | if (wandev->state == WAN_UNCONFIGURED) |
| 507 | return 0; |
| 508 | |
| 509 | printk(KERN_INFO "\n%s: Shutting Down!\n",wandev->name); |
| 510 | |
| 511 | for (dev = wandev->dev; dev;) { |
| 512 | err = wanrouter_delete_interface(wandev, dev->name); |
| 513 | if (err) |
| 514 | return err; |
| 515 | /* The above function deallocates the current dev |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 516 | * structure. Therefore, we cannot use netdev_priv(dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | * as the next element: wandev->dev points to the |
| 518 | * next element */ |
| 519 | dev = wandev->dev; |
| 520 | } |
| 521 | |
| 522 | if (wandev->ndev) |
| 523 | return -EBUSY; /* there are opened interfaces */ |
| 524 | |
| 525 | if (wandev->shutdown) |
| 526 | err=wandev->shutdown(wandev); |
| 527 | |
| 528 | return err; |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * Get WAN device status & statistics. |
| 533 | */ |
| 534 | |
| 535 | static int wanrouter_device_stat(struct wan_device *wandev, |
| 536 | wandev_stat_t __user *u_stat) |
| 537 | { |
| 538 | wandev_stat_t stat; |
| 539 | |
| 540 | memset(&stat, 0, sizeof(stat)); |
| 541 | |
| 542 | /* Ask device driver to update device statistics */ |
| 543 | if ((wandev->state != WAN_UNCONFIGURED) && wandev->update) |
| 544 | wandev->update(wandev); |
| 545 | |
| 546 | /* Fill out structure */ |
| 547 | stat.ndev = wandev->ndev; |
| 548 | stat.state = wandev->state; |
| 549 | |
| 550 | if (copy_to_user(u_stat, &stat, sizeof(stat))) |
| 551 | return -EFAULT; |
| 552 | |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Create new WAN interface. |
| 558 | * o verify user address space |
| 559 | * o copy configuration data to kernel address space |
| 560 | * o allocate network interface data space |
| 561 | * o call driver's new_if() entry point |
| 562 | * o make sure there is no interface name conflict |
| 563 | * o register network interface |
| 564 | */ |
| 565 | |
| 566 | static int wanrouter_device_new_if(struct wan_device *wandev, |
| 567 | wanif_conf_t __user *u_conf) |
| 568 | { |
| 569 | wanif_conf_t *cnf; |
| 570 | struct net_device *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | int err; |
| 572 | |
| 573 | if ((wandev->state == WAN_UNCONFIGURED) || (wandev->new_if == NULL)) |
| 574 | return -ENODEV; |
| 575 | |
| 576 | cnf = kmalloc(sizeof(wanif_conf_t), GFP_KERNEL); |
| 577 | if (!cnf) |
| 578 | return -ENOBUFS; |
| 579 | |
| 580 | err = -EFAULT; |
| 581 | if (copy_from_user(cnf, u_conf, sizeof(wanif_conf_t))) |
| 582 | goto out; |
| 583 | |
| 584 | err = -EINVAL; |
| 585 | if (cnf->magic != ROUTER_MAGIC) |
| 586 | goto out; |
| 587 | |
| 588 | if (cnf->config_id == WANCONFIG_MPPP) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!\n", |
| 590 | wandev->name); |
| 591 | err = -EPROTONOSUPPORT; |
| 592 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | err = wandev->new_if(wandev, dev, cnf); |
| 595 | } |
| 596 | |
| 597 | if (!err) { |
| 598 | /* Register network interface. This will invoke init() |
| 599 | * function supplied by the driver. If device registered |
| 600 | * successfully, add it to the interface list. |
| 601 | */ |
| 602 | |
| 603 | if (dev->name == NULL) { |
| 604 | err = -EINVAL; |
| 605 | } else { |
| 606 | |
| 607 | #ifdef WANDEBUG |
| 608 | printk(KERN_INFO "%s: registering interface %s...\n", |
| 609 | wanrouter_modname, dev->name); |
| 610 | #endif |
| 611 | |
| 612 | err = register_netdev(dev); |
| 613 | if (!err) { |
| 614 | struct net_device *slave = NULL; |
| 615 | unsigned long smp_flags=0; |
| 616 | |
| 617 | lock_adapter_irq(&wandev->lock, &smp_flags); |
| 618 | |
| 619 | if (wandev->dev == NULL) { |
| 620 | wandev->dev = dev; |
| 621 | } else { |
| 622 | for (slave=wandev->dev; |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 623 | DEV_TO_SLAVE(slave); |
| 624 | slave = DEV_TO_SLAVE(slave)) |
| 625 | DEV_TO_SLAVE(slave) = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
| 627 | ++wandev->ndev; |
| 628 | |
| 629 | unlock_adapter_irq(&wandev->lock, &smp_flags); |
| 630 | err = 0; /* done !!! */ |
| 631 | goto out; |
| 632 | } |
| 633 | } |
| 634 | if (wandev->del_if) |
| 635 | wandev->del_if(wandev, dev); |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 636 | free_netdev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | } |
| 638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | out: |
| 640 | kfree(cnf); |
| 641 | return err; |
| 642 | } |
| 643 | |
| 644 | |
| 645 | /* |
| 646 | * Delete WAN logical channel. |
| 647 | * o verify user address space |
| 648 | * o copy configuration data to kernel address space |
| 649 | */ |
| 650 | |
| 651 | static int wanrouter_device_del_if(struct wan_device *wandev, char __user *u_name) |
| 652 | { |
| 653 | char name[WAN_IFNAME_SZ + 1]; |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 654 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | if (wandev->state == WAN_UNCONFIGURED) |
| 657 | return -ENODEV; |
| 658 | |
| 659 | memset(name, 0, sizeof(name)); |
| 660 | |
| 661 | if (copy_from_user(name, u_name, WAN_IFNAME_SZ)) |
| 662 | return -EFAULT; |
| 663 | |
| 664 | err = wanrouter_delete_interface(wandev, name); |
| 665 | if (err) |
| 666 | return err; |
| 667 | |
| 668 | /* If last interface being deleted, shutdown card |
| 669 | * This helps with administration at leaf nodes |
| 670 | * (You can tell if the person at the other end of the phone |
| 671 | * has an interface configured) and avoids DoS vulnerabilities |
| 672 | * in binary driver files - this fixes a problem with the current |
| 673 | * Sangoma driver going into strange states when all the network |
| 674 | * interfaces are deleted and the link irrecoverably disconnected. |
| 675 | */ |
| 676 | |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 677 | if (!wandev->ndev && wandev->shutdown) |
| 678 | err = wandev->shutdown(wandev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
| 680 | return err; |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Miscellaneous Functions |
| 685 | */ |
| 686 | |
| 687 | /* |
| 688 | * Find WAN device by name. |
| 689 | * Return pointer to the WAN device data space or NULL if device not found. |
| 690 | */ |
| 691 | |
| 692 | static struct wan_device *wanrouter_find_device(char *name) |
| 693 | { |
| 694 | struct wan_device *wandev; |
| 695 | |
| 696 | for (wandev = wanrouter_router_devlist; |
| 697 | wandev && strcmp(wandev->name, name); |
| 698 | wandev = wandev->next); |
| 699 | return wandev; |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * Delete WAN logical channel identified by its name. |
| 704 | * o find logical channel by its name |
| 705 | * o call driver's del_if() entry point |
| 706 | * o unregister network interface |
| 707 | * o unlink channel data space from linked list of channels |
| 708 | * o release channel data space |
| 709 | * |
| 710 | * Return: 0 success |
| 711 | * -ENODEV channel not found. |
| 712 | * -EBUSY interface is open |
| 713 | * |
| 714 | * Note: If (force != 0), then device will be destroyed even if interface |
| 715 | * associated with it is open. It's caller's responsibility to make |
| 716 | * sure that opened interfaces are not removed! |
| 717 | */ |
| 718 | |
| 719 | static int wanrouter_delete_interface(struct wan_device *wandev, char *name) |
| 720 | { |
| 721 | struct net_device *dev = NULL, *prev = NULL; |
| 722 | unsigned long smp_flags=0; |
| 723 | |
| 724 | lock_adapter_irq(&wandev->lock, &smp_flags); |
| 725 | dev = wandev->dev; |
| 726 | prev = NULL; |
| 727 | while (dev && strcmp(name, dev->name)) { |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 728 | struct net_device **slave = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | prev = dev; |
| 730 | dev = *slave; |
| 731 | } |
| 732 | unlock_adapter_irq(&wandev->lock, &smp_flags); |
| 733 | |
| 734 | if (dev == NULL) |
| 735 | return -ENODEV; /* interface not found */ |
| 736 | |
| 737 | if (netif_running(dev)) |
| 738 | return -EBUSY; /* interface in use */ |
| 739 | |
| 740 | if (wandev->del_if) |
| 741 | wandev->del_if(wandev, dev); |
| 742 | |
| 743 | lock_adapter_irq(&wandev->lock, &smp_flags); |
| 744 | if (prev) { |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 745 | struct net_device **prev_slave = netdev_priv(prev); |
| 746 | struct net_device **slave = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | *prev_slave = *slave; |
| 749 | } else { |
Wang Chen | 7be6065 | 2008-11-20 04:26:21 -0800 | [diff] [blame] | 750 | struct net_device **slave = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | wandev->dev = *slave; |
| 752 | } |
| 753 | --wandev->ndev; |
| 754 | unlock_adapter_irq(&wandev->lock, &smp_flags); |
| 755 | |
| 756 | printk(KERN_INFO "%s: unregistering '%s'\n", wandev->name, dev->name); |
| 757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | unregister_netdev(dev); |
| 759 | |
| 760 | free_netdev(dev); |
| 761 | |
| 762 | return 0; |
| 763 | } |
| 764 | |
Adrian Bunk | 97353cb | 2007-02-05 18:07:27 -0800 | [diff] [blame] | 765 | static void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | { |
YOSHIFUJI Hideaki | 4ba6122 | 2007-02-09 23:25:25 +0900 | [diff] [blame] | 767 | spin_lock_irqsave(lock, *smp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | } |
| 769 | |
| 770 | |
Adrian Bunk | 97353cb | 2007-02-05 18:07:27 -0800 | [diff] [blame] | 771 | static void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | { |
| 773 | spin_unlock_irqrestore(lock, *smp_flags); |
| 774 | } |
| 775 | |
| 776 | EXPORT_SYMBOL(register_wan_device); |
| 777 | EXPORT_SYMBOL(unregister_wan_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
| 779 | MODULE_LICENSE("GPL"); |
| 780 | |
| 781 | /* |
| 782 | * End |
| 783 | */ |