wanmain.c
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上传日期:2013-04-10
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- /*****************************************************************************
- * wanmain.c WAN Multiprotocol Router Module. Main code.
- *
- * This module is completely hardware-independent and provides
- * the following common services for the WAN Link Drivers:
- * o WAN device managenment (registering, unregistering)
- * o Network interface management
- * o Physical connection management (dial-up, incoming calls)
- * o Logical connection management (switched virtual circuits)
- * o Protocol encapsulation/decapsulation
- *
- * Author: Gideon Hack
- *
- * Copyright: (c) 1995-1999 Sangoma Technologies Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- * ============================================================================
- * Nov 24, 2000 Nenad Corbic Updated for 2.4.X kernels
- * Nov 07, 2000 Nenad Corbic Fixed the Mulit-Port PPP for kernels 2.2.16 and
- * greater.
- * Aug 2, 2000 Nenad Corbic Block the Multi-Port PPP from running on
- * kernels 2.2.16 or greater. The SyncPPP
- * has changed.
- * Jul 13, 2000 Nenad Corbic Added SyncPPP support
- * Added extra debugging in device_setup().
- * Oct 01, 1999 Gideon Hack Update for s514 PCI card
- * Dec 27, 1996 Gene Kozin Initial version (based on Sangoma's WANPIPE)
- * Jan 16, 1997 Gene Kozin router_devlist made public
- * Jan 31, 1997 Alan Cox Hacked it about a bit for 2.1
- * Jun 27, 1997 Alan Cox realigned with vendor code
- * Oct 15, 1997 Farhan Thawar changed wan_encapsulate to add a pad byte of 0
- * Apr 20, 1998 Alan Cox Fixed 2.1 symbols
- * May 17, 1998 K. Baranowski Fixed SNAP encapsulation in wan_encapsulate
- * Dec 15, 1998 Arnaldo Melo support for firmwares of up to 128000 bytes
- * check wandev->setup return value
- * Dec 22, 1998 Arnaldo Melo vmalloc/vfree used in device_setup to allocate
- * kernel memory and copy configuration data to
- * kernel space (for big firmwares)
- * Jun 02, 1999 Gideon Hack Updates for Linux 2.0.X and 2.2.X kernels.
- *****************************************************************************/
- #include <linux/version.h>
- #include <linux/config.h>
- #include <linux/stddef.h> /* offsetof(), etc. */
- #include <linux/errno.h> /* return codes */
- #include <linux/kernel.h>
- #include <linux/module.h> /* support for loadable modules */
- #include <linux/slab.h> /* kmalloc(), kfree() */
- #include <linux/mm.h> /* verify_area(), etc. */
- #include <linux/string.h> /* inline mem*, str* functions */
- #include <asm/byteorder.h> /* htons(), etc. */
- #include <linux/wanrouter.h> /* WAN router API definitions */
- #if defined(LINUX_2_4)
- #include <linux/vmalloc.h> /* vmalloc, vfree */
- #include <asm/uaccess.h> /* copy_to/from_user */
- #include <linux/init.h> /* __initfunc et al. */
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
- #include <net/syncppp.h>
- #else
- #include <../drivers/net/wan/syncppp.h>
- #endif
- #elif defined(LINUX_2_1)
- #define LINUX_2_1
- #include <linux/vmalloc.h> /* vmalloc, vfree */
- #include <asm/uaccess.h> /* copy_to/from_user */
- #include <linux/init.h> /* __initfunc et al. */
- #include <../drivers/net/syncppp.h>
- #else
- #include <asm/segment.h> /* kernel <-> user copy */
- #endif
- #define KMEM_SAFETYZONE 8
- /***********FOR DEBUGGING PURPOSES*********************************************
- static void * dbg_kmalloc(unsigned int size, int prio, int line) {
- int i = 0;
- void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio);
- char * c1 = v;
- c1 += sizeof(unsigned int);
- *((unsigned int *)v) = size;
- for (i = 0; i < KMEM_SAFETYZONE; i++) {
- c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D';
- c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F';
- c1 += 8;
- }
- c1 += size;
- for (i = 0; i < KMEM_SAFETYZONE; i++) {
- c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G';
- c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L';
- c1 += 8;
- }
- v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8;
- printk(KERN_INFO "line %d kmalloc(%d,%d) = %pn",line,size,prio,v);
- return v;
- }
- static void dbg_kfree(void * v, int line) {
- unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8));
- unsigned int size = *sp;
- char * c1 = ((char *)v) - KMEM_SAFETYZONE*8;
- int i = 0;
- for (i = 0; i < KMEM_SAFETYZONE; i++) {
- if ( c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D'
- || c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') {
- printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!n",v);
- printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2xn", i*8,
- c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
- }
- c1 += 8;
- }
- c1 += size;
- for (i = 0; i < KMEM_SAFETYZONE; i++) {
- if ( c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G'
- || c1[4] != 'W' || c1[5] != 'A' || c1[6] != 'L' || c1[7] != 'L'
- ) {
- printk(KERN_INFO "kmalloced block at %p has been corrupted (overrun):n",v);
- printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2xn", i*8,
- c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] );
- }
- c1 += 8;
- }
- printk(KERN_INFO "line %d kfree(%p)n",line,v);
- v = ((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8);
- kfree(v);
- }
- #define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__)
- #define kfree(x) dbg_kfree(x,__LINE__)
- *****************************************************************************/
- /*
- * Function Prototypes
- */
- /*
- * Kernel loadable module interface.
- */
- #ifdef MODULE
- int init_module (void);
- void cleanup_module (void);
- #endif
- /*
- * WAN device IOCTL handlers
- */
- static int device_setup(wan_device_t *wandev, wandev_conf_t *u_conf);
- static int device_stat(wan_device_t *wandev, wandev_stat_t *u_stat);
- static int device_shutdown(wan_device_t *wandev);
- static int device_new_if(wan_device_t *wandev, wanif_conf_t *u_conf);
- static int device_del_if(wan_device_t *wandev, char *u_name);
-
- /*
- * Miscellaneous
- */
- static wan_device_t *find_device (char *name);
- static int delete_interface (wan_device_t *wandev, char *name);
- void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags);
- void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags);
- /*
- * Global Data
- */
- static char fullname[] = "Sangoma WANPIPE Router";
- static char copyright[] = "(c) 1995-2000 Sangoma Technologies Inc.";
- static char modname[] = ROUTER_NAME; /* short module name */
- wan_device_t* router_devlist = NULL; /* list of registered devices */
- static int devcnt = 0;
- /*
- * Organize Unique Identifiers for encapsulation/decapsulation
- */
- static unsigned char oui_ether[] = { 0x00, 0x00, 0x00 };
- #if 0
- static unsigned char oui_802_2[] = { 0x00, 0x80, 0xC2 };
- #endif
- #ifndef MODULE
- int wanrouter_init(void)
- {
- int err;
- extern int wanpipe_init(void);
- extern int sdladrv_init(void);
- printk(KERN_INFO "%s v%u.%u %sn",
- fullname, ROUTER_VERSION, ROUTER_RELEASE, copyright);
- err = wanrouter_proc_init();
- if (err){
- printk(KERN_INFO "%s: can't create entry in proc filesystem!n", modname);
- }
- /*
- * Initialise compiled in boards
- */
- #ifdef CONFIG_VENDOR_SANGOMA
- sdladrv_init();
- wanpipe_init();
- #endif
-
- return err;
- }
- #ifdef LINUX_2_4
- static void __exit wanrouter_cleanup (void)
- {
- wanrouter_proc_cleanup();
- }
- #endif
- #else
- /*
- * Kernel Loadable Module Entry Points
- */
- /*
- * Module 'insert' entry point.
- * o print announcement
- * o initialize static data
- * o create /proc/net/router directory and static entries
- *
- * Return: 0 Ok
- * < 0 error.
- * Context: process
- */
- int init_module (void)
- {
- int err;
- printk(KERN_INFO "%s v%u.%u %sn",
- fullname, ROUTER_VERSION, ROUTER_RELEASE, copyright);
-
- err = wanrouter_proc_init();
-
- if (err){
- printk(KERN_INFO
- "%s: can't create entry in proc filesystem!n", modname);
- }
- return err;
- }
- /*
- * Module 'remove' entry point.
- * o delete /proc/net/router directory and static entries.
- */
- void cleanup_module (void)
- {
- wanrouter_proc_cleanup();
- }
- #endif
- /*
- * Kernel APIs
- */
- /*
- * Register WAN device.
- * o verify device credentials
- * o create an entry for the device in the /proc/net/router directory
- * o initialize internally maintained fields of the wan_device structure
- * o link device data space to a singly-linked list
- * o if it's the first device, then start kernel 'thread'
- * o increment module use count
- *
- * Return:
- * 0 Ok
- * < 0 error.
- *
- * Context: process
- */
- int register_wan_device(wan_device_t *wandev)
- {
- int err, namelen;
- if ((wandev == NULL) || (wandev->magic != ROUTER_MAGIC) ||
- (wandev->name == NULL))
- return -EINVAL;
-
- namelen = strlen(wandev->name);
- if (!namelen || (namelen > WAN_DRVNAME_SZ))
- return -EINVAL;
-
- if (find_device(wandev->name) != NULL)
- return -EEXIST;
- #ifdef WANDEBUG
- printk(KERN_INFO "%s: registering WAN device %sn",
- modname, wandev->name);
- #endif
- /*
- * Register /proc directory entry
- */
- err = wanrouter_proc_add(wandev);
- if (err) {
- printk(KERN_INFO
- "%s: can't create /proc/net/router/%s entry!n",
- modname, wandev->name);
- return err;
- }
- /*
- * Initialize fields of the wan_device structure maintained by the
- * router and update local data.
- */
-
- wandev->ndev = 0;
- wandev->dev = NULL;
- wandev->next = router_devlist;
- router_devlist = wandev;
- ++devcnt;
- MOD_INC_USE_COUNT; /* prevent module from unloading */
- return 0;
- }
- /*
- * Unregister WAN device.
- * o shut down device
- * o unlink device data space from the linked list
- * o delete device entry in the /proc/net/router directory
- * o decrement module use count
- *
- * Return: 0 Ok
- * <0 error.
- * Context: process
- */
- int unregister_wan_device(char *name)
- {
- wan_device_t *wandev, *prev;
- if (name == NULL)
- return -EINVAL;
- for (wandev = router_devlist, prev = NULL;
- wandev && strcmp(wandev->name, name);
- prev = wandev, wandev = wandev->next)
- ;
- if (wandev == NULL)
- return -ENODEV;
- #ifdef WANDEBUG
- printk(KERN_INFO "%s: unregistering WAN device %sn", modname, name);
- #endif
- if (wandev->state != WAN_UNCONFIGURED) {
- device_shutdown(wandev);
- }
-
- if (prev){
- prev->next = wandev->next;
- }else{
- router_devlist = wandev->next;
- }
-
- --devcnt;
- wanrouter_proc_delete(wandev);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- /*
- * Encapsulate packet.
- *
- * Return: encapsulation header size
- * < 0 - unsupported Ethertype
- *
- * Notes:
- * 1. This function may be called on interrupt context.
- */
- int wanrouter_encapsulate (struct sk_buff *skb, netdevice_t *dev,
- unsigned short type)
- {
- int hdr_len = 0;
- switch (type) {
- case ETH_P_IP: /* IP datagram encapsulation */
- hdr_len += 1;
- skb_push(skb, 1);
- skb->data[0] = NLPID_IP;
- break;
- case ETH_P_IPX: /* SNAP encapsulation */
- case ETH_P_ARP:
- hdr_len += 7;
- skb_push(skb, 7);
- skb->data[0] = 0;
- skb->data[1] = NLPID_SNAP;
- memcpy(&skb->data[2], oui_ether, sizeof(oui_ether));
- *((unsigned short*)&skb->data[5]) = htons(type);
- break;
- default: /* Unknown packet type */
- printk(KERN_INFO
- "%s: unsupported Ethertype 0x%04X on interface %s!n",
- modname, type, dev->name);
- hdr_len = -EINVAL;
- }
- return hdr_len;
- }
- /*
- * Decapsulate packet.
- *
- * Return: Ethertype (in network order)
- * 0 unknown encapsulation
- *
- * Notes:
- * 1. This function may be called on interrupt context.
- */
- unsigned short wanrouter_type_trans (struct sk_buff *skb, netdevice_t *dev)
- {
- int cnt = skb->data[0] ? 0 : 1; /* there may be a pad present */
- unsigned short ethertype;
- switch (skb->data[cnt]) {
- case NLPID_IP: /* IP datagramm */
- ethertype = htons(ETH_P_IP);
- cnt += 1;
- break;
- case NLPID_SNAP: /* SNAP encapsulation */
- if (memcmp(&skb->data[cnt + 1], oui_ether, sizeof(oui_ether))){
- printk(KERN_INFO
- "%s: unsupported SNAP OUI %02X-%02X-%02X "
- "on interface %s!n", modname,
- skb->data[cnt+1], skb->data[cnt+2],
- skb->data[cnt+3], dev->name);
- return 0;
- }
- ethertype = *((unsigned short*)&skb->data[cnt+4]);
- cnt += 6;
- break;
- /* add other protocols, e.g. CLNP, ESIS, ISIS, if needed */
- default:
- printk(KERN_INFO
- "%s: unsupported NLPID 0x%02X on interface %s!n",
- modname, skb->data[cnt], dev->name);
- return 0;
- }
- skb->protocol = ethertype;
- skb->pkt_type = PACKET_HOST; /* Physically point to point */
- skb_pull(skb, cnt);
- skb->mac.raw = skb->data;
- return ethertype;
- }
- /*
- * WAN device IOCTL.
- * o find WAN device associated with this node
- * o execute requested action or pass command to the device driver
- */
- int wanrouter_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- int err = 0;
- struct proc_dir_entry *dent;
- wan_device_t *wandev;
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- if (!capable(CAP_NET_ADMIN)){
- return -EPERM;
- }
- #endif
-
- if ((cmd >> 8) != ROUTER_IOCTL)
- return -EINVAL;
-
- dent = inode->u.generic_ip;
- if ((dent == NULL) || (dent->data == NULL))
- return -EINVAL;
-
- wandev = dent->data;
- if (wandev->magic != ROUTER_MAGIC)
- return -EINVAL;
-
- switch (cmd) {
- case ROUTER_SETUP:
- err = device_setup(wandev, (void*)arg);
- break;
- case ROUTER_DOWN:
- err = device_shutdown(wandev);
- break;
- case ROUTER_STAT:
- err = device_stat(wandev, (void*)arg);
- break;
- case ROUTER_IFNEW:
- err = device_new_if(wandev, (void*)arg);
- break;
- case ROUTER_IFDEL:
- err = device_del_if(wandev, (void*)arg);
- break;
- case ROUTER_IFSTAT:
- break;
- default:
- if ((cmd >= ROUTER_USER) &&
- (cmd <= ROUTER_USER_MAX) &&
- wandev->ioctl)
- err = wandev->ioctl(wandev, cmd, arg);
- else err = -EINVAL;
- }
- return err;
- }
- /*
- * WAN Driver IOCTL Handlers
- */
- /*
- * Setup WAN link device.
- * o verify user address space
- * o allocate kernel memory and copy configuration data to kernel space
- * o if configuration data includes extension, copy it to kernel space too
- * o call driver's setup() entry point
- */
- static int device_setup (wan_device_t *wandev, wandev_conf_t *u_conf)
- {
- void *data = NULL;
- wandev_conf_t *conf;
- int err = -EINVAL;
- if (wandev->setup == NULL){ /* Nothing to do ? */
- printk(KERN_INFO "%s: ERROR, No setup script: wandev->setup()n",
- wandev->name);
- return 0;
- }
- #ifdef LINUX_2_0
- err = verify_area (VERIFY_READ, u_conf, sizeof(wandev_conf_t));
- if(err){
- return err;
- }
- #endif
- conf = kmalloc(sizeof(wandev_conf_t), GFP_KERNEL);
- if (conf == NULL){
- printk(KERN_INFO "%s: ERROR, Failed to allocate kernel memory !n",
- wandev->name);
- return -ENOBUFS;
- }
-
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- if(copy_from_user(conf, u_conf, sizeof(wandev_conf_t))) {
- printk(KERN_INFO "%s: Failed to copy user config data to kernel space!n",
- wandev->name);
- kfree(conf);
- return -EFAULT;
- }
- #else
- memcpy_fromfs ((void *)conf, (void *)u_conf, sizeof(wandev_conf_t));
- #endif
-
- if (conf->magic != ROUTER_MAGIC){
- kfree(conf);
- printk(KERN_INFO "%s: ERROR, Invalid MAGIC Numbern",
- wandev->name);
- return -EINVAL;
- }
- if (conf->data_size && conf->data){
- if(conf->data_size > 128000 || conf->data_size < 0) {
- printk(KERN_INFO
- "%s: ERROR, Invalid firmware data size %i !n",
- wandev->name, conf->data_size);
- kfree(conf);
- return -EINVAL;;
- }
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- data = vmalloc(conf->data_size);
- if (data) {
- if(!copy_from_user(data, conf->data, conf->data_size)){
- conf->data=data;
- err = wandev->setup(wandev,conf);
- }else{
- printk(KERN_INFO
- "%s: ERROR, Faild to copy from user data !n",
- wandev->name);
- err = -EFAULT;
- }
- }else{
- printk(KERN_INFO
- "%s: ERROR, Faild allocate kernel memory !n",
- wandev->name);
- err = -ENOBUFS;
- }
-
- if (data){
- vfree(data);
- }
- #else
- err = verify_area(VERIFY_READ, conf->data, conf->data_size);
- if (!err) {
- data = kmalloc(conf->data_size, GFP_KERNEL);
- if (data) {
- memcpy_fromfs(data, (void*)conf->data,
- conf->data_size);
- conf->data = data;
- }else{
- printk(KERN_INFO
- "%s: ERROR, Faild allocate kernel memory !n",wandev->name);
- err = -ENOMEM;
- }
- }else{
- printk(KERN_INFO
- "%s: ERROR, Faild to copy from user data !n",wandev->name);
- }
- if (!err){
- err = wandev->setup(wandev, conf);
- }
-
- if (data){
- kfree(data);
- }
- #endif
- }else{
- printk(KERN_INFO
- "%s: ERROR, No firmware found ! Firmware size = %i !n",
- wandev->name, conf->data_size);
- }
- kfree(conf);
- return err;
- }
- /*
- * Shutdown WAN device.
- * o delete all not opened logical channels for this device
- * o call driver's shutdown() entry point
- */
-
- static int device_shutdown (wan_device_t *wandev)
- {
- netdevice_t *dev;
- int err=0;
-
- if (wandev->state == WAN_UNCONFIGURED){
- return 0;
- }
- printk(KERN_INFO "n%s: Shutting Down!n",wandev->name);
-
- for (dev = wandev->dev; dev;) {
- if ((err=delete_interface(wandev, dev->name)) != 0){
- return err;
- }
- /* The above function deallocates the current dev
- * structure. Therefore, we cannot use dev->priv
- * as the next element: wandev->dev points to the
- * next element */
- dev = wandev->dev;
- }
-
- if (wandev->ndev){
- return -EBUSY; /* there are opened interfaces */
- }
-
- if (wandev->shutdown)
- err=wandev->shutdown(wandev);
-
- return err;
- }
- /*
- * Get WAN device status & statistics.
- */
- static int device_stat (wan_device_t *wandev, wandev_stat_t *u_stat)
- {
- wandev_stat_t stat;
- #ifdef LINUX_2_0
- int err;
- err = verify_area(VERIFY_WRITE, u_stat, sizeof(wandev_stat_t));
- if (err)
- return err;
- #endif
- memset(&stat, 0, sizeof(stat));
- /* Ask device driver to update device statistics */
- if ((wandev->state != WAN_UNCONFIGURED) && wandev->update)
- wandev->update(wandev);
- /* Fill out structure */
- stat.ndev = wandev->ndev;
- stat.state = wandev->state;
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- if(copy_to_user(u_stat, &stat, sizeof(stat)))
- return -EFAULT;
- #else
- memcpy_tofs((void*)u_stat, (void*)&stat, sizeof(stat));
- #endif
- return 0;
- }
- /*
- * Create new WAN interface.
- * o verify user address space
- * o copy configuration data to kernel address space
- * o allocate network interface data space
- * o call driver's new_if() entry point
- * o make sure there is no interface name conflict
- * o register network interface
- */
- static int device_new_if (wan_device_t *wandev, wanif_conf_t *u_conf)
- {
- wanif_conf_t conf;
- netdevice_t *dev=NULL;
- #ifdef CONFIG_WANPIPE_MULTPPP
- struct ppp_device *pppdev=NULL;
- #endif
- int err;
- if ((wandev->state == WAN_UNCONFIGURED) || (wandev->new_if == NULL))
- return -ENODEV;
-
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- if(copy_from_user(&conf, u_conf, sizeof(wanif_conf_t)))
- return -EFAULT;
- #else
- err = verify_area(VERIFY_READ, u_conf, sizeof(wanif_conf_t));
- if (err)
- return err;
- memcpy_fromfs((void*)&conf, (void*)u_conf, sizeof(wanif_conf_t));
- #endif
-
- if (conf.magic != ROUTER_MAGIC)
- return -EINVAL;
- err = -EPROTONOSUPPORT;
-
- #ifdef CONFIG_WANPIPE_MULTPPP
- if (conf.config_id == WANCONFIG_MPPP){
- pppdev = kmalloc(sizeof(struct ppp_device), GFP_KERNEL);
- if (pppdev == NULL){
- return -ENOBUFS;
- }
- memset(pppdev, 0, sizeof(struct ppp_device));
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,16)
- pppdev->dev = kmalloc(sizeof(netdevice_t), GFP_KERNEL);
- if (pppdev->dev == NULL){
- kfree(pppdev);
- return -ENOBUFS;
- }
- memset(pppdev->dev, 0, sizeof(netdevice_t));
- #endif
-
- err = wandev->new_if(wandev, (netdevice_t *)pppdev, &conf);
-
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,16)
- dev = pppdev->dev;
- #else
- dev = &pppdev->dev;
- #endif
-
- }else{
- dev = kmalloc(sizeof(netdevice_t), GFP_KERNEL);
- if (dev == NULL){
- return -ENOBUFS;
- }
- memset(dev, 0, sizeof(netdevice_t));
- err = wandev->new_if(wandev, dev, &conf);
- }
- #else
- /* Sync PPP is disabled */
- if (conf.config_id != WANCONFIG_MPPP){
- dev = kmalloc(sizeof(netdevice_t), GFP_KERNEL);
- if (dev == NULL){
- return -ENOBUFS;
- }
- memset(dev, 0, sizeof(netdevice_t));
- err = wandev->new_if(wandev, dev, &conf);
- }else{
- printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!n",
- wandev->name);
- return err;
- }
- #endif
-
- if (!err) {
- /* Register network interface. This will invoke init()
- * function supplied by the driver. If device registered
- * successfully, add it to the interface list.
- */
- if (dev->name == NULL){
- err = -EINVAL;
- }else if (dev_get(dev->name)){
- err = -EEXIST; /* name already exists */
- }else{
-
- #ifdef WANDEBUG
- printk(KERN_INFO "%s: registering interface %s...n",
- modname, dev->name);
- #endif
-
- err = register_netdev(dev);
- if (!err) {
- netdevice_t *slave=NULL;
- unsigned long smp_flags=0;
-
- lock_adapter_irq(&wandev->lock, &smp_flags);
-
- if (wandev->dev == NULL){
- wandev->dev = dev;
- }else{
- for (slave=wandev->dev;
- *((netdevice_t**)slave->priv);
- slave=*((netdevice_t**)slave->priv));
- *((netdevice_t**)slave->priv) = dev;
- }
- ++wandev->ndev;
-
- unlock_adapter_irq(&wandev->lock, &smp_flags);
- return 0; /* done !!! */
- }
- }
- if (wandev->del_if)
- wandev->del_if(wandev, dev);
- }
- /* This code has moved from del_if() function */
- if (dev->priv){
- kfree(dev->priv);
- dev->priv=NULL;
- }
-
- #ifdef CONFIG_WANPIPE_MULTPPP
- if (conf.config_id == WANCONFIG_MPPP){
- kfree(pppdev);
- }else{
- kfree(dev);
- }
- #else
- /* Sync PPP is disabled */
- if (conf.config_id != WANCONFIG_MPPP){
- kfree(dev);
- }
- #endif
-
- return err;
- }
- /*
- * Delete WAN logical channel.
- * o verify user address space
- * o copy configuration data to kernel address space
- */
- static int device_del_if (wan_device_t *wandev, char *u_name)
- {
- char name[WAN_IFNAME_SZ + 1];
- int err = 0;
- if (wandev->state == WAN_UNCONFIGURED)
- return -ENODEV;
-
- #ifdef LINUX_2_0
- err = verify_area(VERIFY_READ, u_name, WAN_IFNAME_SZ);
- if (err)
- return err;
- #endif
- memset(name, 0, sizeof(name));
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- if(copy_from_user(name, u_name, WAN_IFNAME_SZ))
- return -EFAULT;
- #else
- memcpy_fromfs((void*)name, (void*)u_name, WAN_IFNAME_SZ);
- #endif
- err = delete_interface(wandev, name);
- if (err)
- return(err);
- /* If last interface being deleted, shutdown card
- * This helps with administration at leaf nodes
- * (You can tell if the person at the other end of the phone
- * has an interface configured) and avoids DoS vulnerabilities
- * in binary driver files - this fixes a problem with the current
- * Sangoma driver going into strange states when all the network
- * interfaces are deleted and the link irrecoverably disconnected.
- */
- if (!wandev->ndev && wandev->shutdown){
- err = wandev->shutdown(wandev);
- }
- return err;
- }
- /*
- * Miscellaneous Functions
- */
- /*
- * Find WAN device by name.
- * Return pointer to the WAN device data space or NULL if device not found.
- */
- static wan_device_t *find_device(char *name)
- {
- wan_device_t *wandev;
- for (wandev = router_devlist;wandev && strcmp(wandev->name, name);
- wandev = wandev->next);
- return wandev;
- }
- /*
- * Delete WAN logical channel identified by its name.
- * o find logical channel by its name
- * o call driver's del_if() entry point
- * o unregister network interface
- * o unlink channel data space from linked list of channels
- * o release channel data space
- *
- * Return: 0 success
- * -ENODEV channel not found.
- * -EBUSY interface is open
- *
- * Note: If (force != 0), then device will be destroyed even if interface
- * associated with it is open. It's caller's responsibility to make
- * sure that opened interfaces are not removed!
- */
- static int delete_interface (wan_device_t *wandev, char *name)
- {
- netdevice_t *dev=NULL, *prev=NULL;
- unsigned long smp_flags=0;
- lock_adapter_irq(&wandev->lock, &smp_flags);
- dev = wandev->dev;
- prev = NULL;
- while (dev && strcmp(name, dev->name)) {
- netdevice_t **slave = dev->priv;
- prev = dev;
- dev = *slave;
- }
- unlock_adapter_irq(&wandev->lock, &smp_flags);
-
- if (dev == NULL){
- return -ENODEV; /* interface not found */
- }
-
- #ifdef LINUX_2_4
- if (netif_running(dev)){
- #else
- if (dev->start) {
- #endif
- return -EBUSY; /* interface in use */
- }
- if (wandev->del_if)
- wandev->del_if(wandev, dev);
- lock_adapter_irq(&wandev->lock, &smp_flags);
- if (prev) {
- netdevice_t **prev_slave = prev->priv;
- netdevice_t **slave = dev->priv;
- *prev_slave = *slave;
- } else {
- netdevice_t **slave = dev->priv;
- wandev->dev = *slave;
- }
- --wandev->ndev;
- unlock_adapter_irq(&wandev->lock, &smp_flags);
-
- printk(KERN_INFO "%s: unregistering '%s'n", wandev->name, dev->name);
-
- /* Due to new interface linking method using dev->priv,
- * this code has moved from del_if() function.*/
- if (dev->priv){
- kfree(dev->priv);
- dev->priv=NULL;
- }
- unregister_netdev(dev);
- #ifdef LINUX_2_4
- kfree(dev);
- #else
- if (dev->name){
- kfree(dev->name);
- }
- kfree(dev);
- #endif
- return 0;
- }
- void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
- {
- #ifdef LINUX_2_0
- save_flags(*smp_flags);
- cli();
- #else
- spin_lock_irqsave(lock, *smp_flags);
- #endif
- }
- void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
- {
- #ifdef LINUX_2_0
- restore_flags(*smp_flags);
- #else
- spin_unlock_irqrestore(lock, *smp_flags);
- #endif
- }
- #if defined (LINUX_2_1) || defined (LINUX_2_4)
- EXPORT_SYMBOL(register_wan_device);
- EXPORT_SYMBOL(unregister_wan_device);
- EXPORT_SYMBOL(wanrouter_encapsulate);
- EXPORT_SYMBOL(wanrouter_type_trans);
- EXPORT_SYMBOL(lock_adapter_irq);
- EXPORT_SYMBOL(unlock_adapter_irq);
- #endif
- /*
- * End
- */