Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/wanrouter/wanmain.c b/net/wanrouter/wanmain.c
new file mode 100644
index 0000000..956c17f
--- /dev/null
+++ b/net/wanrouter/wanmain.c
@@ -0,0 +1,888 @@
+/*****************************************************************************
+* 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/config.h>
+#include <linux/stddef.h> /* offsetof(), etc. */
+#include <linux/errno.h> /* return codes */
+#include <linux/kernel.h>
+#include <linux/init.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 */
+
+#include <linux/vmalloc.h> /* vmalloc, vfree */
+#include <asm/uaccess.h> /* copy_to/from_user */
+#include <linux/init.h> /* __initfunc et al. */
+#include <net/syncppp.h>
+
+#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) = %p\n",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 %2x\n", 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 %2x\n", 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
+ */
+
+/*
+ * WAN device IOCTL handlers
+ */
+
+static int wanrouter_device_setup(struct wan_device *wandev,
+ wandev_conf_t __user *u_conf);
+static int wanrouter_device_stat(struct wan_device *wandev,
+ wandev_stat_t __user *u_stat);
+static int wanrouter_device_shutdown(struct wan_device *wandev);
+static int wanrouter_device_new_if(struct wan_device *wandev,
+ wanif_conf_t __user *u_conf);
+static int wanrouter_device_del_if(struct wan_device *wandev,
+ char __user *u_name);
+
+/*
+ * Miscellaneous
+ */
+
+static struct wan_device *wanrouter_find_device(char *name);
+static int wanrouter_delete_interface(struct wan_device *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 wanrouter_fullname[] = "Sangoma WANPIPE Router";
+static char wanrouter_copyright[] = "(c) 1995-2000 Sangoma Technologies Inc.";
+static char wanrouter_modname[] = ROUTER_NAME; /* short module name */
+struct wan_device* wanrouter_router_devlist; /* list of registered devices */
+
+/*
+ * Organize Unique Identifiers for encapsulation/decapsulation
+ */
+
+static unsigned char wanrouter_oui_ether[] = { 0x00, 0x00, 0x00 };
+#if 0
+static unsigned char wanrouter_oui_802_2[] = { 0x00, 0x80, 0xC2 };
+#endif
+
+static int __init wanrouter_init(void)
+{
+ int err;
+
+ printk(KERN_INFO "%s v%u.%u %s\n",
+ wanrouter_fullname, ROUTER_VERSION, ROUTER_RELEASE,
+ wanrouter_copyright);
+
+ err = wanrouter_proc_init();
+ if (err)
+ printk(KERN_INFO "%s: can't create entry in proc filesystem!\n",
+ wanrouter_modname);
+
+ return err;
+}
+
+static void __exit wanrouter_cleanup (void)
+{
+ wanrouter_proc_cleanup();
+}
+
+/*
+ * This is just plain dumb. We should move the bugger to drivers/net/wan,
+ * slap it first in directory and make it module_init(). The only reason
+ * for subsys_initcall() here is that net goes after drivers (why, BTW?)
+ */
+subsys_initcall(wanrouter_init);
+module_exit(wanrouter_cleanup);
+
+/*
+ * 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(struct wan_device *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 (wanrouter_find_device(wandev->name))
+ return -EEXIST;
+
+#ifdef WANDEBUG
+ printk(KERN_INFO "%s: registering WAN device %s\n",
+ wanrouter_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",
+ wanrouter_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 = wanrouter_router_devlist;
+ wanrouter_router_devlist = wandev;
+ 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)
+{
+ struct wan_device *wandev, *prev;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ for (wandev = wanrouter_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 %s\n",
+ wanrouter_modname, name);
+#endif
+
+ if (wandev->state != WAN_UNCONFIGURED)
+ wanrouter_device_shutdown(wandev);
+
+ if (prev)
+ prev->next = wandev->next;
+ else
+ wanrouter_router_devlist = wandev->next;
+
+ wanrouter_proc_delete(wandev);
+ 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, struct net_device *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], wanrouter_oui_ether,
+ sizeof(wanrouter_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",
+ wanrouter_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, struct net_device *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], wanrouter_oui_ether,
+ sizeof(wanrouter_oui_ether))){
+ printk(KERN_INFO
+ "%s: unsupported SNAP OUI %02X-%02X-%02X "
+ "on interface %s!\n", wanrouter_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",
+ wanrouter_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;
+ struct wan_device *wandev;
+ void __user *data = (void __user *)arg;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if ((cmd >> 8) != ROUTER_IOCTL)
+ return -EINVAL;
+
+ dent = PDE(inode);
+ if ((dent == NULL) || (dent->data == NULL))
+ return -EINVAL;
+
+ wandev = dent->data;
+ if (wandev->magic != ROUTER_MAGIC)
+ return -EINVAL;
+
+ switch (cmd) {
+ case ROUTER_SETUP:
+ err = wanrouter_device_setup(wandev, data);
+ break;
+
+ case ROUTER_DOWN:
+ err = wanrouter_device_shutdown(wandev);
+ break;
+
+ case ROUTER_STAT:
+ err = wanrouter_device_stat(wandev, data);
+ break;
+
+ case ROUTER_IFNEW:
+ err = wanrouter_device_new_if(wandev, data);
+ break;
+
+ case ROUTER_IFDEL:
+ err = wanrouter_device_del_if(wandev, data);
+ 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 wanrouter_device_setup(struct wan_device *wandev,
+ wandev_conf_t __user *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;
+ }
+
+ 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 (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;
+ }
+
+ if (conf->magic != ROUTER_MAGIC) {
+ kfree(conf);
+ printk(KERN_INFO "%s: ERROR, Invalid MAGIC Number\n",
+ 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;
+ }
+
+ data = vmalloc(conf->data_size);
+ if (!data) {
+ printk(KERN_INFO
+ "%s: ERROR, Faild allocate kernel memory !\n",
+ wandev->name);
+ kfree(conf);
+ return -ENOBUFS;
+ }
+ 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;
+ }
+ vfree(data);
+ } 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 wanrouter_device_shutdown(struct wan_device *wandev)
+{
+ struct net_device *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;) {
+ err = wanrouter_delete_interface(wandev, dev->name);
+ if (err)
+ 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 wanrouter_device_stat(struct wan_device *wandev,
+ wandev_stat_t __user *u_stat)
+{
+ wandev_stat_t stat;
+
+ 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 (copy_to_user(u_stat, &stat, sizeof(stat)))
+ return -EFAULT;
+
+ 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 wanrouter_device_new_if(struct wan_device *wandev,
+ wanif_conf_t __user *u_conf)
+{
+ wanif_conf_t *cnf;
+ struct net_device *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;
+
+ cnf = kmalloc(sizeof(wanif_conf_t), GFP_KERNEL);
+ if (!cnf)
+ return -ENOBUFS;
+
+ err = -EFAULT;
+ if (copy_from_user(cnf, u_conf, sizeof(wanif_conf_t)))
+ goto out;
+
+ err = -EINVAL;
+ if (cnf->magic != ROUTER_MAGIC)
+ goto out;
+
+ if (cnf->config_id == WANCONFIG_MPPP) {
+#ifdef CONFIG_WANPIPE_MULTPPP
+ pppdev = kmalloc(sizeof(struct ppp_device), GFP_KERNEL);
+ err = -ENOBUFS;
+ if (pppdev == NULL)
+ goto out;
+ memset(pppdev, 0, sizeof(struct ppp_device));
+ pppdev->dev = kmalloc(sizeof(struct net_device), GFP_KERNEL);
+ if (pppdev->dev == NULL) {
+ kfree(pppdev);
+ err = -ENOBUFS;
+ goto out;
+ }
+ memset(pppdev->dev, 0, sizeof(struct net_device));
+ err = wandev->new_if(wandev, (struct net_device *)pppdev, cnf);
+ dev = pppdev->dev;
+#else
+ printk(KERN_INFO "%s: Wanpipe Mulit-Port PPP support has not been compiled in!\n",
+ wandev->name);
+ err = -EPROTONOSUPPORT;
+ goto out;
+#endif
+ } else {
+ dev = kmalloc(sizeof(struct net_device), GFP_KERNEL);
+ err = -ENOBUFS;
+ if (dev == NULL)
+ goto out;
+ memset(dev, 0, sizeof(struct net_device));
+ err = wandev->new_if(wandev, dev, cnf);
+ }
+
+ 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 {
+
+ #ifdef WANDEBUG
+ printk(KERN_INFO "%s: registering interface %s...\n",
+ wanrouter_modname, dev->name);
+ #endif
+
+ err = register_netdev(dev);
+ if (!err) {
+ struct net_device *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;
+ *((struct net_device **)slave->priv);
+ slave = *((struct net_device **)slave->priv));
+
+ *((struct net_device **)slave->priv) = dev;
+ }
+ ++wandev->ndev;
+
+ unlock_adapter_irq(&wandev->lock, &smp_flags);
+ err = 0; /* done !!! */
+ goto out;
+ }
+ }
+ 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 (cnf->config_id == WANCONFIG_MPPP)
+ kfree(pppdev);
+ else
+ kfree(dev);
+#else
+ /* Sync PPP is disabled */
+ if (cnf->config_id != WANCONFIG_MPPP)
+ kfree(dev);
+#endif
+
+out:
+ kfree(cnf);
+ return err;
+}
+
+
+/*
+ * Delete WAN logical channel.
+ * o verify user address space
+ * o copy configuration data to kernel address space
+ */
+
+static int wanrouter_device_del_if(struct wan_device *wandev, char __user *u_name)
+{
+ char name[WAN_IFNAME_SZ + 1];
+ int err = 0;
+
+ if (wandev->state == WAN_UNCONFIGURED)
+ return -ENODEV;
+
+ memset(name, 0, sizeof(name));
+
+ if (copy_from_user(name, u_name, WAN_IFNAME_SZ))
+ return -EFAULT;
+
+ err = wanrouter_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 struct wan_device *wanrouter_find_device(char *name)
+{
+ struct wan_device *wandev;
+
+ for (wandev = wanrouter_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 wanrouter_delete_interface(struct wan_device *wandev, char *name)
+{
+ struct net_device *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)) {
+ struct net_device **slave = dev->priv;
+ prev = dev;
+ dev = *slave;
+ }
+ unlock_adapter_irq(&wandev->lock, &smp_flags);
+
+ if (dev == NULL)
+ return -ENODEV; /* interface not found */
+
+ if (netif_running(dev))
+ return -EBUSY; /* interface in use */
+
+ if (wandev->del_if)
+ wandev->del_if(wandev, dev);
+
+ lock_adapter_irq(&wandev->lock, &smp_flags);
+ if (prev) {
+ struct net_device **prev_slave = prev->priv;
+ struct net_device **slave = dev->priv;
+
+ *prev_slave = *slave;
+ } else {
+ struct net_device **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);
+
+ free_netdev(dev);
+
+ return 0;
+}
+
+void lock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
+{
+ spin_lock_irqsave(lock, *smp_flags);
+}
+
+
+void unlock_adapter_irq(spinlock_t *lock, unsigned long *smp_flags)
+{
+ spin_unlock_irqrestore(lock, *smp_flags);
+}
+
+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);
+
+MODULE_LICENSE("GPL");
+
+/*
+ * End
+ */
