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root/net/decnet/dn_dev.c

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DEFINITIONS

This source file includes following definitions.
  1. dn_dev_sysctl_register
  2. dn_dev_sysctl_unregister
  3. dn_forwarding_proc
  4. dn_forwarding_sysctl
  5. dn_dev_sysctl_unregister
  6. dn_dev_sysctl_register
  7. mtu2blksize
  8. dn_dev_alloc_ifa
  9. dn_dev_free_ifa
  10. dn_dev_del_ifa
  11. dn_dev_insert_ifa
  12. dn_dev_set_ifa
  13. dn_dev_ioctl
  14. dn_dev_get_default
  15. dn_dev_set_default
  16. dn_dev_check_default
  17. dn_dev_by_index
  18. dn_nl_deladdr
  19. dn_nl_newaddr
  20. dn_ifaddr_nlmsg_size
  21. dn_nl_fill_ifaddr
  22. dn_ifaddr_notify
  23. dn_nl_dump_ifaddr
  24. dn_dev_get_first
  25. dn_dev_bind_default
  26. dn_send_endnode_hello
  27. dn_am_i_a_router
  28. dn_send_router_hello
  29. dn_send_brd_hello
  30. dn_send_ptp_hello
  31. dn_eth_up
  32. dn_eth_down
  33. dn_dev_timer_func
  34. dn_dev_set_timer
  35. dn_dev_create
  36. dn_dev_up
  37. dn_dev_delete
  38. dn_dev_down
  39. dn_dev_init_pkt
  40. dn_dev_veri_pkt
  41. dn_dev_hello
  42. dn_dev_devices_off
  43. dn_dev_devices_on
  44. register_dnaddr_notifier
  45. unregister_dnaddr_notifier
  46. is_dn_dev
  47. dn_dev_seq_start
  48. dn_dev_seq_next
  49. dn_dev_seq_stop
  50. dn_type2asc
  51. dn_dev_seq_show
  52. dn_dev_seq_open
  53. dn_dev_init
  54. dn_dev_cleanup

/*
 * DECnet       An implementation of the DECnet protocol suite for the LINUX
 *              operating system.  DECnet is implemented using the  BSD Socket
 *              interface as the means of communication with the user level.
 *
 *              DECnet Device Layer
 *
 * Authors:     Steve Whitehouse <SteveW@ACM.org>
 *              Eduardo Marcelo Serrat <emserrat@geocities.com>
 *
 * Changes:
 *          Steve Whitehouse : Devices now see incoming frames so they
 *                             can mark on who it came from.
 *          Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
 *                             can now have a device specific setup func.
 *          Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
 *          Steve Whitehouse : Fixed bug which sometimes killed timer
 *          Steve Whitehouse : Multiple ifaddr support
 *          Steve Whitehouse : SIOCGIFCONF is now a compile time option
 *          Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
 *          Steve Whitehouse : Removed timer1 - it's a user space issue now
 *         Patrick Caulfield : Fixed router hello message format
 *          Steve Whitehouse : Got rid of constant sizes for blksize for
 *                             devices. All mtu based now.
 */

#include <linux/capability.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/net.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/if_addr.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/sysctl.h>
#include <linux/notifier.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <net/net_namespace.h>
#include <net/neighbour.h>
#include <net/dst.h>
#include <net/flow.h>
#include <net/fib_rules.h>
#include <net/netlink.h>
#include <net/dn.h>
#include <net/dn_dev.h>
#include <net/dn_route.h>
#include <net/dn_neigh.h>
#include <net/dn_fib.h>

#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))

static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
static char dn_rt_all_rt_mcast[ETH_ALEN]  = {0xAB,0x00,0x00,0x03,0x00,0x00};
static char dn_hiord[ETH_ALEN]            = {0xAA,0x00,0x04,0x00,0x00,0x00};
static unsigned char dn_eco_version[3]    = {0x02,0x00,0x00};

extern struct neigh_table dn_neigh_table;

/*
 * decnet_address is kept in network order.
 */
__le16 decnet_address = 0;

static DEFINE_RWLOCK(dndev_lock);
static struct net_device *decnet_default_device;
static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);

static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
static void dn_dev_delete(struct net_device *dev);
static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);

static int dn_eth_up(struct net_device *);
static void dn_eth_down(struct net_device *);
static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);

static struct dn_dev_parms dn_dev_list[] =  {
{
        .type =         ARPHRD_ETHER, /* Ethernet */
        .mode =         DN_DEV_BCAST,
        .state =        DN_DEV_S_RU,
        .t2 =           1,
        .t3 =           10,
        .name =         "ethernet",
        .ctl_name =     NET_DECNET_CONF_ETHER,
        .up =           dn_eth_up,
        .down =         dn_eth_down,
        .timer3 =       dn_send_brd_hello,
},
{
        .type =         ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
        .mode =         DN_DEV_BCAST,
        .state =        DN_DEV_S_RU,
        .t2 =           1,
        .t3 =           10,
        .name =         "ipgre",
        .ctl_name =     NET_DECNET_CONF_GRE,
        .timer3 =       dn_send_brd_hello,
},
#if 0
{
        .type =         ARPHRD_X25, /* Bog standard X.25 */
        .mode =         DN_DEV_UCAST,
        .state =        DN_DEV_S_DS,
        .t2 =           1,
        .t3 =           120,
        .name =         "x25",
        .ctl_name =     NET_DECNET_CONF_X25,
        .timer3 =       dn_send_ptp_hello,
},
#endif
#if 0
{
        .type =         ARPHRD_PPP, /* DECnet over PPP */
        .mode =         DN_DEV_BCAST,
        .state =        DN_DEV_S_RU,
        .t2 =           1,
        .t3 =           10,
        .name =         "ppp",
        .ctl_name =     NET_DECNET_CONF_PPP,
        .timer3 =       dn_send_brd_hello,
},
#endif
{
        .type =         ARPHRD_DDCMP, /* DECnet over DDCMP */
        .mode =         DN_DEV_UCAST,
        .state =        DN_DEV_S_DS,
        .t2 =           1,
        .t3 =           120,
        .name =         "ddcmp",
        .ctl_name =     NET_DECNET_CONF_DDCMP,
        .timer3 =       dn_send_ptp_hello,
},
{
        .type =         ARPHRD_LOOPBACK, /* Loopback interface - always last */
        .mode =         DN_DEV_BCAST,
        .state =        DN_DEV_S_RU,
        .t2 =           1,
        .t3 =           10,
        .name =         "loopback",
        .ctl_name =     NET_DECNET_CONF_LOOPBACK,
        .timer3 =       dn_send_brd_hello,
}
};

#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)

#define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))

#ifdef CONFIG_SYSCTL

static int min_t2[] = { 1 };
static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
static int min_t3[] = { 1 };
static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */

static int min_priority[1];
static int max_priority[] = { 127 }; /* From DECnet spec */

static int dn_forwarding_proc(ctl_table *, int, struct file *,
                        void __user *, size_t *, loff_t *);
static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
                        void __user *oldval, size_t __user *oldlenp,
                        void __user *newval, size_t newlen);

static struct dn_dev_sysctl_table {
        struct ctl_table_header *sysctl_header;
        ctl_table dn_dev_vars[5];
} dn_dev_sysctl = {
        NULL,
        {
        {
                .ctl_name = NET_DECNET_CONF_DEV_FORWARDING,
                .procname = "forwarding",
                .data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
                .maxlen = sizeof(int),
                .mode = 0644,
                .proc_handler = dn_forwarding_proc,
                .strategy = dn_forwarding_sysctl,
        },
        {
                .ctl_name = NET_DECNET_CONF_DEV_PRIORITY,
                .procname = "priority",
                .data = (void *)DN_DEV_PARMS_OFFSET(priority),
                .maxlen = sizeof(int),
                .mode = 0644,
                .proc_handler = proc_dointvec_minmax,
                .strategy = sysctl_intvec,
                .extra1 = &min_priority,
                .extra2 = &max_priority
        },
        {
                .ctl_name = NET_DECNET_CONF_DEV_T2,
                .procname = "t2",
                .data = (void *)DN_DEV_PARMS_OFFSET(t2),
                .maxlen = sizeof(int),
                .mode = 0644,
                .proc_handler = proc_dointvec_minmax,
                .strategy = sysctl_intvec,
                .extra1 = &min_t2,
                .extra2 = &max_t2
        },
        {
                .ctl_name = NET_DECNET_CONF_DEV_T3,
                .procname = "t3",
                .data = (void *)DN_DEV_PARMS_OFFSET(t3),
                .maxlen = sizeof(int),
                .mode = 0644,
                .proc_handler = proc_dointvec_minmax,
                .strategy = sysctl_intvec,
                .extra1 = &min_t3,
                .extra2 = &max_t3
        },
        {0}
        },
};

static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
{
        struct dn_dev_sysctl_table *t;
        int i;

#define DN_CTL_PATH_DEV 3

        struct ctl_path dn_ctl_path[] = {
                { .procname = "net", .ctl_name = CTL_NET, },
                { .procname = "decnet", .ctl_name = NET_DECNET, },
                { .procname = "conf", .ctl_name = NET_DECNET_CONF, },
                { /* to be set */ },
                { },
        };

        t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
        if (t == NULL)
                return;

        for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
                long offset = (long)t->dn_dev_vars[i].data;
                t->dn_dev_vars[i].data = ((char *)parms) + offset;
        }

        if (dev) {
                dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
                dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = dev->ifindex;
        } else {
                dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
                dn_ctl_path[DN_CTL_PATH_DEV].ctl_name = parms->ctl_name;
        }

        t->dn_dev_vars[0].extra1 = (void *)dev;

        t->sysctl_header = register_sysctl_paths(dn_ctl_path, t->dn_dev_vars);
        if (t->sysctl_header == NULL)
                kfree(t);
        else
                parms->sysctl = t;
}

static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
{
        if (parms->sysctl) {
                struct dn_dev_sysctl_table *t = parms->sysctl;
                parms->sysctl = NULL;
                unregister_sysctl_table(t->sysctl_header);
                kfree(t);
        }
}

static int dn_forwarding_proc(ctl_table *table, int write,
                                struct file *filep,
                                void __user *buffer,
                                size_t *lenp, loff_t *ppos)
{
#ifdef CONFIG_DECNET_ROUTER
        struct net_device *dev = table->extra1;
        struct dn_dev *dn_db;
        int err;
        int tmp, old;

        if (table->extra1 == NULL)
                return -EINVAL;

        dn_db = dev->dn_ptr;
        old = dn_db->parms.forwarding;

        err = proc_dointvec(table, write, filep, buffer, lenp, ppos);

        if ((err >= 0) && write) {
                if (dn_db->parms.forwarding < 0)
                        dn_db->parms.forwarding = 0;
                if (dn_db->parms.forwarding > 2)
                        dn_db->parms.forwarding = 2;
                /*
                 * What an ugly hack this is... its works, just. It
                 * would be nice if sysctl/proc were just that little
                 * bit more flexible so I don't have to write a special
                 * routine, or suffer hacks like this - SJW
                 */
                tmp = dn_db->parms.forwarding;
                dn_db->parms.forwarding = old;
                if (dn_db->parms.down)
                        dn_db->parms.down(dev);
                dn_db->parms.forwarding = tmp;
                if (dn_db->parms.up)
                        dn_db->parms.up(dev);
        }

        return err;
#else
        return -EINVAL;
#endif
}

static int dn_forwarding_sysctl(ctl_table *table, int __user *name, int nlen,
                        void __user *oldval, size_t __user *oldlenp,
                        void __user *newval, size_t newlen)
{
#ifdef CONFIG_DECNET_ROUTER
        struct net_device *dev = table->extra1;
        struct dn_dev *dn_db;
        int value;

        if (table->extra1 == NULL)
                return -EINVAL;

        dn_db = dev->dn_ptr;

        if (newval && newlen) {
                if (newlen != sizeof(int))
                        return -EINVAL;

                if (get_user(value, (int __user *)newval))
                        return -EFAULT;
                if (value < 0)
                        return -EINVAL;
                if (value > 2)
                        return -EINVAL;

                if (dn_db->parms.down)
                        dn_db->parms.down(dev);
                dn_db->parms.forwarding = value;
                if (dn_db->parms.up)
                        dn_db->parms.up(dev);
        }

        return 0;
#else
        return -EINVAL;
#endif
}

#else /* CONFIG_SYSCTL */
static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
{
}
static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
{
}

#endif /* CONFIG_SYSCTL */

static inline __u16 mtu2blksize(struct net_device *dev)
{
        u32 blksize = dev->mtu;
        if (blksize > 0xffff)
                blksize = 0xffff;

        if (dev->type == ARPHRD_ETHER ||
            dev->type == ARPHRD_PPP ||
            dev->type == ARPHRD_IPGRE ||
            dev->type == ARPHRD_LOOPBACK)
                blksize -= 2;

        return (__u16)blksize;
}

static struct dn_ifaddr *dn_dev_alloc_ifa(void)
{
        struct dn_ifaddr *ifa;

        ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);

        return ifa;
}

static __inline__ void dn_dev_free_ifa(struct dn_ifaddr *ifa)
{
        kfree(ifa);
}

static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int destroy)
{
        struct dn_ifaddr *ifa1 = *ifap;
        unsigned char mac_addr[6];
        struct net_device *dev = dn_db->dev;

        ASSERT_RTNL();

        *ifap = ifa1->ifa_next;

        if (dn_db->dev->type == ARPHRD_ETHER) {
                if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
                        dn_dn2eth(mac_addr, ifa1->ifa_local);
                        dev_mc_delete(dev, mac_addr, ETH_ALEN, 0);
                }
        }

        dn_ifaddr_notify(RTM_DELADDR, ifa1);
        blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
        if (destroy) {
                dn_dev_free_ifa(ifa1);

                if (dn_db->ifa_list == NULL)
                        dn_dev_delete(dn_db->dev);
        }
}

static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
{
        struct net_device *dev = dn_db->dev;
        struct dn_ifaddr *ifa1;
        unsigned char mac_addr[6];

        ASSERT_RTNL();

        /* Check for duplicates */
        for(ifa1 = dn_db->ifa_list; ifa1; ifa1 = ifa1->ifa_next) {
                if (ifa1->ifa_local == ifa->ifa_local)
                        return -EEXIST;
        }

        if (dev->type == ARPHRD_ETHER) {
                if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
                        dn_dn2eth(mac_addr, ifa->ifa_local);
                        dev_mc_add(dev, mac_addr, ETH_ALEN, 0);
                }
        }

        ifa->ifa_next = dn_db->ifa_list;
        dn_db->ifa_list = ifa;

        dn_ifaddr_notify(RTM_NEWADDR, ifa);
        blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);

        return 0;
}

static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
{
        struct dn_dev *dn_db = dev->dn_ptr;
        int rv;

        if (dn_db == NULL) {
                int err;
                dn_db = dn_dev_create(dev, &err);
                if (dn_db == NULL)
                        return err;
        }

        ifa->ifa_dev = dn_db;

        if (dev->flags & IFF_LOOPBACK)
                ifa->ifa_scope = RT_SCOPE_HOST;

        rv = dn_dev_insert_ifa(dn_db, ifa);
        if (rv)
                dn_dev_free_ifa(ifa);
        return rv;
}


int dn_dev_ioctl(unsigned int cmd, void __user *arg)
{
        char buffer[DN_IFREQ_SIZE];
        struct ifreq *ifr = (struct ifreq *)buffer;
        struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
        struct dn_dev *dn_db;
        struct net_device *dev;
        struct dn_ifaddr *ifa = NULL, **ifap = NULL;
        int ret = 0;

        if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
                return -EFAULT;
        ifr->ifr_name[IFNAMSIZ-1] = 0;

#ifdef CONFIG_KMOD
        dev_load(&init_net, ifr->ifr_name);
#endif

        switch(cmd) {
                case SIOCGIFADDR:
                        break;
                case SIOCSIFADDR:
                        if (!capable(CAP_NET_ADMIN))
                                return -EACCES;
                        if (sdn->sdn_family != AF_DECnet)
                                return -EINVAL;
                        break;
                default:
                        return -EINVAL;
        }

        rtnl_lock();

        if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
                ret = -ENODEV;
                goto done;
        }

        if ((dn_db = dev->dn_ptr) != NULL) {
                for (ifap = &dn_db->ifa_list; (ifa=*ifap) != NULL; ifap = &ifa->ifa_next)
                        if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
                                break;
        }

        if (ifa == NULL && cmd != SIOCSIFADDR) {
                ret = -EADDRNOTAVAIL;
                goto done;
        }

        switch(cmd) {
                case SIOCGIFADDR:
                        *((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
                        goto rarok;

                case SIOCSIFADDR:
                        if (!ifa) {
                                if ((ifa = dn_dev_alloc_ifa()) == NULL) {
                                        ret = -ENOBUFS;
                                        break;
                                }
                                memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
                        } else {
                                if (ifa->ifa_local == dn_saddr2dn(sdn))
                                        break;
                                dn_dev_del_ifa(dn_db, ifap, 0);
                        }

                        ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);

                        ret = dn_dev_set_ifa(dev, ifa);
        }
done:
        rtnl_unlock();

        return ret;
rarok:
        if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
                ret = -EFAULT;
        goto done;
}

struct net_device *dn_dev_get_default(void)
{
        struct net_device *dev;
        read_lock(&dndev_lock);
        dev = decnet_default_device;
        if (dev) {
                if (dev->dn_ptr)
                        dev_hold(dev);
                else
                        dev = NULL;
        }
        read_unlock(&dndev_lock);
        return dev;
}

int dn_dev_set_default(struct net_device *dev, int force)
{
        struct net_device *old = NULL;
        int rv = -EBUSY;
        if (!dev->dn_ptr)
                return -ENODEV;
        write_lock(&dndev_lock);
        if (force || decnet_default_device == NULL) {
                old = decnet_default_device;
                decnet_default_device = dev;
                rv = 0;
        }
        write_unlock(&dndev_lock);
        if (old)
                dev_put(old);
        return rv;
}

static void dn_dev_check_default(struct net_device *dev)
{
        write_lock(&dndev_lock);
        if (dev == decnet_default_device) {
                decnet_default_device = NULL;
        } else {
                dev = NULL;
        }
        write_unlock(&dndev_lock);
        if (dev)
                dev_put(dev);
}

static struct dn_dev *dn_dev_by_index(int ifindex)
{
        struct net_device *dev;
        struct dn_dev *dn_dev = NULL;
        dev = dev_get_by_index(&init_net, ifindex);
        if (dev) {
                dn_dev = dev->dn_ptr;
                dev_put(dev);
        }

        return dn_dev;
}

static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
        [IFA_ADDRESS]           = { .type = NLA_U16 },
        [IFA_LOCAL]             = { .type = NLA_U16 },
        [IFA_LABEL]             = { .type = NLA_STRING,
                                    .len = IFNAMSIZ - 1 },
};

static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
        struct net *net = sock_net(skb->sk);
        struct nlattr *tb[IFA_MAX+1];
        struct dn_dev *dn_db;
        struct ifaddrmsg *ifm;
        struct dn_ifaddr *ifa, **ifap;
        int err = -EINVAL;

        if (net != &init_net)
                goto errout;

        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
        if (err < 0)
                goto errout;

        err = -ENODEV;
        ifm = nlmsg_data(nlh);
        if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
                goto errout;

        err = -EADDRNOTAVAIL;
        for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
                if (tb[IFA_LOCAL] &&
                    nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
                        continue;

                if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
                        continue;

                dn_dev_del_ifa(dn_db, ifap, 1);
                return 0;
        }

errout:
        return err;
}

static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
        struct net *net = sock_net(skb->sk);
        struct nlattr *tb[IFA_MAX+1];
        struct net_device *dev;
        struct dn_dev *dn_db;
        struct ifaddrmsg *ifm;
        struct dn_ifaddr *ifa;
        int err;

        if (net != &init_net)
                return -EINVAL;

        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
        if (err < 0)
                return err;

        if (tb[IFA_LOCAL] == NULL)
                return -EINVAL;

        ifm = nlmsg_data(nlh);
        if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
                return -ENODEV;

        if ((dn_db = dev->dn_ptr) == NULL) {
                int err;
                dn_db = dn_dev_create(dev, &err);
                if (!dn_db)
                        return err;
        }

        if ((ifa = dn_dev_alloc_ifa()) == NULL)
                return -ENOBUFS;

        if (tb[IFA_ADDRESS] == NULL)
                tb[IFA_ADDRESS] = tb[IFA_LOCAL];

        ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
        ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
        ifa->ifa_flags = ifm->ifa_flags;
        ifa->ifa_scope = ifm->ifa_scope;
        ifa->ifa_dev = dn_db;

        if (tb[IFA_LABEL])
                nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
        else
                memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);

        err = dn_dev_insert_ifa(dn_db, ifa);
        if (err)
                dn_dev_free_ifa(ifa);

        return err;
}

static inline size_t dn_ifaddr_nlmsg_size(void)
{
        return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
               + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
               + nla_total_size(2) /* IFA_ADDRESS */
               + nla_total_size(2); /* IFA_LOCAL */
}

static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
                             u32 pid, u32 seq, int event, unsigned int flags)
{
        struct ifaddrmsg *ifm;
        struct nlmsghdr *nlh;

        nlh = nlmsg_put(skb, pid, seq, event, sizeof(*ifm), flags);
        if (nlh == NULL)
                return -EMSGSIZE;

        ifm = nlmsg_data(nlh);
        ifm->ifa_family = AF_DECnet;
        ifm->ifa_prefixlen = 16;
        ifm->ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
        ifm->ifa_scope = ifa->ifa_scope;
        ifm->ifa_index = ifa->ifa_dev->dev->ifindex;

        if (ifa->ifa_address)
                NLA_PUT_LE16(skb, IFA_ADDRESS, ifa->ifa_address);
        if (ifa->ifa_local)
                NLA_PUT_LE16(skb, IFA_LOCAL, ifa->ifa_local);
        if (ifa->ifa_label[0])
                NLA_PUT_STRING(skb, IFA_LABEL, ifa->ifa_label);

        return nlmsg_end(skb, nlh);

nla_put_failure:
        nlmsg_cancel(skb, nlh);
        return -EMSGSIZE;
}

static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
{
        struct sk_buff *skb;
        int err = -ENOBUFS;

        skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
        if (skb == NULL)
                goto errout;

        err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
        if (err < 0) {
                /* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
                WARN_ON(err == -EMSGSIZE);
                kfree_skb(skb);
                goto errout;
        }
        err = rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
errout:
        if (err < 0)
                rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
}

static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
{
        struct net *net = sock_net(skb->sk);
        int idx, dn_idx = 0, skip_ndevs, skip_naddr;
        struct net_device *dev;
        struct dn_dev *dn_db;
        struct dn_ifaddr *ifa;

        if (net != &init_net)
                return 0;

        skip_ndevs = cb->args[0];
        skip_naddr = cb->args[1];

        idx = 0;
        for_each_netdev(&init_net, dev) {
                if (idx < skip_ndevs)
                        goto cont;
                else if (idx > skip_ndevs) {
                        /* Only skip over addresses for first dev dumped
                         * in this iteration (idx == skip_ndevs) */
                        skip_naddr = 0;
                }

                if ((dn_db = dev->dn_ptr) == NULL)
                        goto cont;

                for (ifa = dn_db->ifa_list, dn_idx = 0; ifa;
                     ifa = ifa->ifa_next, dn_idx++) {
                        if (dn_idx < skip_naddr)
                                continue;

                        if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
                                              cb->nlh->nlmsg_seq, RTM_NEWADDR,
                                              NLM_F_MULTI) < 0)
                                goto done;
                }
cont:
                idx++;
        }
done:
        cb->args[0] = idx;
        cb->args[1] = dn_idx;

        return skb->len;
}

static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
{
        struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
        struct dn_ifaddr *ifa;
        int rv = -ENODEV;
        if (dn_db == NULL)
                goto out;
        ifa = dn_db->ifa_list;
        if (ifa != NULL) {
                *addr = ifa->ifa_local;
                rv = 0;
        }
out:
        return rv;
}

/*
 * Find a default address to bind to.
 *
 * This is one of those areas where the initial VMS concepts don't really
 * map onto the Linux concepts, and since we introduced multiple addresses
 * per interface we have to cope with slightly odd ways of finding out what
 * "our address" really is. Mostly it's not a problem; for this we just guess
 * a sensible default. Eventually the routing code will take care of all the
 * nasties for us I hope.
 */
int dn_dev_bind_default(__le16 *addr)
{
        struct net_device *dev;
        int rv;
        dev = dn_dev_get_default();
last_chance:
        if (dev) {
                read_lock(&dev_base_lock);
                rv = dn_dev_get_first(dev, addr);
                read_unlock(&dev_base_lock);
                dev_put(dev);
                if (rv == 0 || dev == init_net.loopback_dev)
                        return rv;
        }
        dev = init_net.loopback_dev;
        dev_hold(dev);
        goto last_chance;
}

static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
{
        struct endnode_hello_message *msg;
        struct sk_buff *skb = NULL;
        __le16 *pktlen;
        struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;

        if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
                return;

        skb->dev = dev;

        msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));

        msg->msgflg  = 0x0D;
        memcpy(msg->tiver, dn_eco_version, 3);
        dn_dn2eth(msg->id, ifa->ifa_local);
        msg->iinfo   = DN_RT_INFO_ENDN;
        msg->blksize = dn_htons(mtu2blksize(dev));
        msg->area    = 0x00;
        memset(msg->seed, 0, 8);
        memcpy(msg->neighbor, dn_hiord, ETH_ALEN);

        if (dn_db->router) {
                struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
                dn_dn2eth(msg->neighbor, dn->addr);
        }

        msg->timer   = dn_htons((unsigned short)dn_db->parms.t3);
        msg->mpd     = 0x00;
        msg->datalen = 0x02;
        memset(msg->data, 0xAA, 2);

        pktlen = (__le16 *)skb_push(skb,2);
        *pktlen = dn_htons(skb->len - 2);

        skb_reset_network_header(skb);

        dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
}


#define DRDELAY (5 * HZ)

static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
{
        /* First check time since device went up */
        if ((jiffies - dn_db->uptime) < DRDELAY)
                return 0;

        /* If there is no router, then yes... */
        if (!dn_db->router)
                return 1;

        /* otherwise only if we have a higher priority or.. */
        if (dn->priority < dn_db->parms.priority)
                return 1;

        /* if we have equal priority and a higher node number */
        if (dn->priority != dn_db->parms.priority)
                return 0;

        if (dn_ntohs(dn->addr) < dn_ntohs(ifa->ifa_local))
                return 1;

        return 0;
}

static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
{
        int n;
        struct dn_dev *dn_db = dev->dn_ptr;
        struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
        struct sk_buff *skb;
        size_t size;
        unsigned char *ptr;
        unsigned char *i1, *i2;
        __le16 *pktlen;
        char *src;

        if (mtu2blksize(dev) < (26 + 7))
                return;

        n = mtu2blksize(dev) - 26;
        n /= 7;

        if (n > 32)
                n = 32;

        size = 2 + 26 + 7 * n;

        if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
                return;

        skb->dev = dev;
        ptr = skb_put(skb, size);

        *ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
        *ptr++ = 2; /* ECO */
        *ptr++ = 0;
        *ptr++ = 0;
        dn_dn2eth(ptr, ifa->ifa_local);
        src = ptr;
        ptr += ETH_ALEN;
        *ptr++ = dn_db->parms.forwarding == 1 ?
                        DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
        *((__le16 *)ptr) = dn_htons(mtu2blksize(dev));
        ptr += 2;
        *ptr++ = dn_db->parms.priority; /* Priority */
        *ptr++ = 0; /* Area: Reserved */
        *((__le16 *)ptr) = dn_htons((unsigned short)dn_db->parms.t3);
        ptr += 2;
        *ptr++ = 0; /* MPD: Reserved */
        i1 = ptr++;
        memset(ptr, 0, 7); /* Name: Reserved */
        ptr += 7;
        i2 = ptr++;

        n = dn_neigh_elist(dev, ptr, n);

        *i2 = 7 * n;
        *i1 = 8 + *i2;

        skb_trim(skb, (27 + *i2));

        pktlen = (__le16 *)skb_push(skb, 2);
        *pktlen = dn_htons(skb->len - 2);

        skb_reset_network_header(skb);

        if (dn_am_i_a_router(dn, dn_db, ifa)) {
                struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
                if (skb2) {
                        dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
                }
        }

        dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
}

static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
{
        struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;

        if (dn_db->parms.forwarding == 0)
                dn_send_endnode_hello(dev, ifa);
        else
                dn_send_router_hello(dev, ifa);
}

static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
{
        int tdlen = 16;
        int size = dev->hard_header_len + 2 + 4 + tdlen;
        struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
        int i;
        unsigned char *ptr;
        char src[ETH_ALEN];

        if (skb == NULL)
                return ;

        skb->dev = dev;
        skb_push(skb, dev->hard_header_len);
        ptr = skb_put(skb, 2 + 4 + tdlen);

        *ptr++ = DN_RT_PKT_HELO;
        *((__le16 *)ptr) = ifa->ifa_local;
        ptr += 2;
        *ptr++ = tdlen;

        for(i = 0; i < tdlen; i++)
                *ptr++ = 0252;

        dn_dn2eth(src, ifa->ifa_local);
        dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
}

static int dn_eth_up(struct net_device *dev)
{
        struct dn_dev *dn_db = dev->dn_ptr;

        if (dn_db->parms.forwarding == 0)
                dev_mc_add(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
        else
                dev_mc_add(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);

        dn_db->use_long = 1;

        return 0;
}

static void dn_eth_down(struct net_device *dev)
{
        struct dn_dev *dn_db = dev->dn_ptr;

        if (dn_db->parms.forwarding == 0)
                dev_mc_delete(dev, dn_rt_all_end_mcast, ETH_ALEN, 0);
        else
                dev_mc_delete(dev, dn_rt_all_rt_mcast, ETH_ALEN, 0);
}

static void dn_dev_set_timer(struct net_device *dev);

static void dn_dev_timer_func(unsigned long arg)
{
        struct net_device *dev = (struct net_device *)arg;
        struct dn_dev *dn_db = dev->dn_ptr;
        struct dn_ifaddr *ifa;

        if (dn_db->t3 <= dn_db->parms.t2) {
                if (dn_db->parms.timer3) {
                        for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next) {
                                if (!(ifa->ifa_flags & IFA_F_SECONDARY))
                                        dn_db->parms.timer3(dev, ifa);
                        }
                }
                dn_db->t3 = dn_db->parms.t3;
        } else {
                dn_db->t3 -= dn_db->parms.t2;
        }

        dn_dev_set_timer(dev);
}

static void dn_dev_set_timer(struct net_device *dev)
{
        struct dn_dev *dn_db = dev->dn_ptr;

        if (dn_db->parms.t2 > dn_db->parms.t3)
                dn_db->parms.t2 = dn_db->parms.t3;

        dn_db->timer.data = (unsigned long)dev;
        dn_db->timer.function = dn_dev_timer_func;
        dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);

        add_timer(&dn_db->timer);
}

struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
{
        int i;
        struct dn_dev_parms *p = dn_dev_list;
        struct dn_dev *dn_db;

        for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
                if (p->type == dev->type)
                        break;
        }

        *err = -ENODEV;
        if (i == DN_DEV_LIST_SIZE)
                return NULL;

        *err = -ENOBUFS;
        if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
                return NULL;

        memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
        smp_wmb();
        dev->dn_ptr = dn_db;
        dn_db->dev = dev;
        init_timer(&dn_db->timer);

        dn_db->uptime = jiffies;

        dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
        if (!dn_db->neigh_parms) {
                dev->dn_ptr = NULL;
                kfree(dn_db);
                return NULL;
        }

        if (dn_db->parms.up) {
                if (dn_db->parms.up(dev) < 0) {
                        neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
                        dev->dn_ptr = NULL;
                        kfree(dn_db);
                        return NULL;
                }
        }

        dn_dev_sysctl_register(dev, &dn_db->parms);

        dn_dev_set_timer(dev);

        *err = 0;
        return dn_db;
}


/*
 * This processes a device up event. We only start up
 * the loopback device & ethernet devices with correct
 * MAC addreses automatically. Others must be started
 * specifically.
 *
 * FIXME: How should we configure the loopback address ? If we could dispense
 * with using decnet_address here and for autobind, it will be one less thing
 * for users to worry about setting up.
 */

void dn_dev_up(struct net_device *dev)
{
        struct dn_ifaddr *ifa;
        __le16 addr = decnet_address;
        int maybe_default = 0;
        struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;

        if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
                return;

        /*
         * Need to ensure that loopback device has a dn_db attached to it
         * to allow creation of neighbours against it, even though it might
         * not have a local address of its own. Might as well do the same for
         * all autoconfigured interfaces.
         */
        if (dn_db == NULL) {
                int err;
                dn_db = dn_dev_create(dev, &err);
                if (dn_db == NULL)
                        return;
        }

        if (dev->type == ARPHRD_ETHER) {
                if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
                        return;
                addr = dn_eth2dn(dev->dev_addr);
                maybe_default = 1;
        }

        if (addr == 0)
                return;

        if ((ifa = dn_dev_alloc_ifa()) == NULL)
                return;

        ifa->ifa_local = ifa->ifa_address = addr;
        ifa->ifa_flags = 0;
        ifa->ifa_scope = RT_SCOPE_UNIVERSE;
        strcpy(ifa->ifa_label, dev->name);

        dn_dev_set_ifa(dev, ifa);

        /*
         * Automagically set the default device to the first automatically
         * configured ethernet card in the system.
         */
        if (maybe_default) {
                dev_hold(dev);
                if (dn_dev_set_default(dev, 0))
                        dev_put(dev);
        }
}

static void dn_dev_delete(struct net_device *dev)
{
        struct dn_dev *dn_db = dev->dn_ptr;

        if (dn_db == NULL)
                return;

        del_timer_sync(&dn_db->timer);
        dn_dev_sysctl_unregister(&dn_db->parms);
        dn_dev_check_default(dev);
        neigh_ifdown(&dn_neigh_table, dev);

        if (dn_db->parms.down)
                dn_db->parms.down(dev);

        dev->dn_ptr = NULL;

        neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
        neigh_ifdown(&dn_neigh_table, dev);

        if (dn_db->router)
                neigh_release(dn_db->router);
        if (dn_db->peer)
                neigh_release(dn_db->peer);

        kfree(dn_db);
}

void dn_dev_down(struct net_device *dev)
{
        struct dn_dev *dn_db = dev->dn_ptr;
        struct dn_ifaddr *ifa;

        if (dn_db == NULL)
                return;

        while((ifa = dn_db->ifa_list) != NULL) {
                dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
                dn_dev_free_ifa(ifa);
        }

        dn_dev_delete(dev);
}

void dn_dev_init_pkt(struct sk_buff *skb)
{
        return;
}

void dn_dev_veri_pkt(struct sk_buff *skb)
{
        return;
}

void dn_dev_hello(struct sk_buff *skb)
{
        return;
}

void dn_dev_devices_off(void)
{
        struct net_device *dev;

        rtnl_lock();
        for_each_netdev(&init_net, dev)
                dn_dev_down(dev);
        rtnl_unlock();

}

void dn_dev_devices_on(void)
{
        struct net_device *dev;

        rtnl_lock();
        for_each_netdev(&init_net, dev) {
                if (dev->flags & IFF_UP)
                        dn_dev_up(dev);
        }
        rtnl_unlock();
}

int register_dnaddr_notifier(struct notifier_block *nb)
{
        return blocking_notifier_chain_register(&dnaddr_chain, nb);
}

int unregister_dnaddr_notifier(struct notifier_block *nb)
{
        return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
}

#ifdef CONFIG_PROC_FS
static inline int is_dn_dev(struct net_device *dev)
{
        return dev->dn_ptr != NULL;
}

static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
{
        int i;
        struct net_device *dev;

        read_lock(&dev_base_lock);

        if (*pos == 0)
                return SEQ_START_TOKEN;

        i = 1;
        for_each_netdev(&init_net, dev) {
                if (!is_dn_dev(dev))
                        continue;

                if (i++ == *pos)
                        return dev;
        }

        return NULL;
}

static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
        struct net_device *dev;

        ++*pos;

        dev = (struct net_device *)v;
        if (v == SEQ_START_TOKEN)
                dev = net_device_entry(&init_net.dev_base_head);

        for_each_netdev_continue(&init_net, dev) {
                if (!is_dn_dev(dev))
                        continue;

                return dev;
        }

        return NULL;
}

static void dn_dev_seq_stop(struct seq_file *seq, void *v)
{
        read_unlock(&dev_base_lock);
}

static char *dn_type2asc(char type)
{
        switch(type) {
                case DN_DEV_BCAST:
                        return "B";
                case DN_DEV_UCAST:
                        return "U";
                case DN_DEV_MPOINT:
                        return "M";
        }

        return "?";
}

static int dn_dev_seq_show(struct seq_file *seq, void *v)
{
        if (v == SEQ_START_TOKEN)
                seq_puts(seq, "Name     Flags T1   Timer1 T3   Timer3 BlkSize Pri State DevType    Router Peer\n");
        else {
                struct net_device *dev = v;
                char peer_buf[DN_ASCBUF_LEN];
                char router_buf[DN_ASCBUF_LEN];
                struct dn_dev *dn_db = dev->dn_ptr;

                seq_printf(seq, "%-8s %1s     %04u %04u   %04lu %04lu"
                                "   %04hu    %03d %02x    %-10s %-7s %-7s\n",
                                dev->name ? dev->name : "???",
                                dn_type2asc(dn_db->parms.mode),
                                0, 0,
                                dn_db->t3, dn_db->parms.t3,
                                mtu2blksize(dev),
                                dn_db->parms.priority,
                                dn_db->parms.state, dn_db->parms.name,
                                dn_db->router ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
                                dn_db->peer ? dn_addr2asc(dn_ntohs(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
        }
        return 0;
}

static const struct seq_operations dn_dev_seq_ops = {
        .start  = dn_dev_seq_start,
        .next   = dn_dev_seq_next,
        .stop   = dn_dev_seq_stop,
        .show   = dn_dev_seq_show,
};

static int dn_dev_seq_open(struct inode *inode, struct file *file)
{
        return seq_open(file, &dn_dev_seq_ops);
}

static const struct file_operations dn_dev_seq_fops = {
        .owner   = THIS_MODULE,
        .open    = dn_dev_seq_open,
        .read    = seq_read,
        .llseek  = seq_lseek,
        .release = seq_release,
};

#endif /* CONFIG_PROC_FS */

static int addr[2];
module_param_array(addr, int, NULL, 0444);
MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");

void __init dn_dev_init(void)
{
        if (addr[0] > 63 || addr[0] < 0) {
                printk(KERN_ERR "DECnet: Area must be between 0 and 63");
                return;
        }

        if (addr[1] > 1023 || addr[1] < 0) {
                printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
                return;
        }

        decnet_address = dn_htons((addr[0] << 10) | addr[1]);

        dn_dev_devices_on();

        rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL);
        rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL);
        rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr);

        proc_net_fops_create(&init_net, "decnet_dev", S_IRUGO, &dn_dev_seq_fops);

#ifdef CONFIG_SYSCTL
        {
                int i;
                for(i = 0; i < DN_DEV_LIST_SIZE; i++)
                        dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
        }
#endif /* CONFIG_SYSCTL */
}

void __exit dn_dev_cleanup(void)
{
#ifdef CONFIG_SYSCTL
        {
                int i;
                for(i = 0; i < DN_DEV_LIST_SIZE; i++)
                        dn_dev_sysctl_unregister(&dn_dev_list[i]);
        }
#endif /* CONFIG_SYSCTL */

        proc_net_remove(&init_net, "decnet_dev");

        dn_dev_devices_off();
}

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