linux/include/net/dn_dev.h
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   1#ifndef _NET_DN_DEV_H
   2#define _NET_DN_DEV_H
   3
   4
   5struct dn_dev;
   6
   7struct dn_ifaddr {
   8        struct dn_ifaddr __rcu *ifa_next;
   9        struct dn_dev    *ifa_dev;
  10        __le16            ifa_local;
  11        __le16            ifa_address;
  12        __u8              ifa_flags;
  13        __u8              ifa_scope;
  14        char              ifa_label[IFNAMSIZ];
  15        struct rcu_head   rcu;
  16};
  17
  18#define DN_DEV_S_RU  0 /* Run - working normally   */
  19#define DN_DEV_S_CR  1 /* Circuit Rejected         */
  20#define DN_DEV_S_DS  2 /* Data Link Start          */
  21#define DN_DEV_S_RI  3 /* Routing Layer Initialize */
  22#define DN_DEV_S_RV  4 /* Routing Layer Verify     */
  23#define DN_DEV_S_RC  5 /* Routing Layer Complete   */
  24#define DN_DEV_S_OF  6 /* Off                      */
  25#define DN_DEV_S_HA  7 /* Halt                     */
  26
  27
  28/*
  29 * The dn_dev_parms structure contains the set of parameters
  30 * for each device (hence inclusion in the dn_dev structure)
  31 * and an array is used to store the default types of supported
  32 * device (in dn_dev.c).
  33 *
  34 * The type field matches the ARPHRD_ constants and is used in
  35 * searching the list for supported devices when new devices
  36 * come up.
  37 *
  38 * The mode field is used to find out if a device is broadcast,
  39 * multipoint, or pointopoint. Please note that DECnet thinks
  40 * different ways about devices to the rest of the kernel
  41 * so the normal IFF_xxx flags are invalid here. For devices
  42 * which can be any combination of the previously mentioned
  43 * attributes, you can set this on a per device basis by
  44 * installing an up() routine.
  45 *
  46 * The device state field, defines the initial state in which the
  47 * device will come up. In the dn_dev structure, it is the actual
  48 * state.
  49 *
  50 * Things have changed here. I've killed timer1 since it's a user space
  51 * issue for a user space routing deamon to sort out. The kernel does
  52 * not need to be bothered with it.
  53 *
  54 * Timers:
  55 * t2 - Rate limit timer, min time between routing and hello messages
  56 * t3 - Hello timer, send hello messages when it expires
  57 *
  58 * Callbacks:
  59 * up() - Called to initialize device, return value can veto use of
  60 *        device with DECnet.
  61 * down() - Called to turn device off when it goes down
  62 * timer3() - Called once for each ifaddr when timer 3 goes off
  63 * 
  64 * sysctl - Hook for sysctl things
  65 *
  66 */
  67struct dn_dev_parms {
  68        int type;                 /* ARPHRD_xxx                         */
  69        int mode;                 /* Broadcast, Unicast, Mulitpoint     */
  70#define DN_DEV_BCAST  1
  71#define DN_DEV_UCAST  2
  72#define DN_DEV_MPOINT 4
  73        int state;                /* Initial state                      */
  74        int forwarding;           /* 0=EndNode, 1=L1Router, 2=L2Router  */
  75        unsigned long t2;         /* Default value of t2                */
  76        unsigned long t3;         /* Default value of t3                */
  77        int priority;             /* Priority to be a router            */
  78        char *name;               /* Name for sysctl                    */
  79        int  (*up)(struct net_device *);
  80        void (*down)(struct net_device *);
  81        void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
  82        void *sysctl;
  83};
  84
  85
  86struct dn_dev {
  87        struct dn_ifaddr __rcu *ifa_list;
  88        struct net_device *dev;
  89        struct dn_dev_parms parms;
  90        char use_long;
  91        struct timer_list timer;
  92        unsigned long t3;
  93        struct neigh_parms *neigh_parms;
  94        __u8 addr[ETH_ALEN];
  95        struct neighbour *router; /* Default router on circuit */
  96        struct neighbour *peer;   /* Peer on pointopoint links */
  97        unsigned long uptime;     /* Time device went up in jiffies */
  98};
  99
 100struct dn_short_packet {
 101        __u8    msgflg;
 102        __le16 dstnode;
 103        __le16 srcnode;
 104        __u8   forward;
 105} __packed;
 106
 107struct dn_long_packet {
 108        __u8   msgflg;
 109        __u8   d_area;
 110        __u8   d_subarea;
 111        __u8   d_id[6];
 112        __u8   s_area;
 113        __u8   s_subarea;
 114        __u8   s_id[6];
 115        __u8   nl2;
 116        __u8   visit_ct;
 117        __u8   s_class;
 118        __u8   pt;
 119} __packed;
 120
 121/*------------------------- DRP - Routing messages ---------------------*/
 122
 123struct endnode_hello_message {
 124        __u8   msgflg;
 125        __u8   tiver[3];
 126        __u8   id[6];
 127        __u8   iinfo;
 128        __le16 blksize;
 129        __u8   area;
 130        __u8   seed[8];
 131        __u8   neighbor[6];
 132        __le16 timer;
 133        __u8   mpd;
 134        __u8   datalen;
 135        __u8   data[2];
 136} __packed;
 137
 138struct rtnode_hello_message {
 139        __u8   msgflg;
 140        __u8   tiver[3];
 141        __u8   id[6];
 142        __u8   iinfo;
 143        __le16  blksize;
 144        __u8   priority;
 145        __u8   area;
 146        __le16  timer;
 147        __u8   mpd;
 148} __packed;
 149
 150
 151extern void dn_dev_init(void);
 152extern void dn_dev_cleanup(void);
 153
 154extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
 155
 156extern void dn_dev_devices_off(void);
 157extern void dn_dev_devices_on(void);
 158
 159extern void dn_dev_init_pkt(struct sk_buff *skb);
 160extern void dn_dev_veri_pkt(struct sk_buff *skb);
 161extern void dn_dev_hello(struct sk_buff *skb);
 162
 163extern void dn_dev_up(struct net_device *);
 164extern void dn_dev_down(struct net_device *);
 165
 166extern int dn_dev_set_default(struct net_device *dev, int force);
 167extern struct net_device *dn_dev_get_default(void);
 168extern int dn_dev_bind_default(__le16 *addr);
 169
 170extern int register_dnaddr_notifier(struct notifier_block *nb);
 171extern int unregister_dnaddr_notifier(struct notifier_block *nb);
 172
 173static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
 174{
 175        struct dn_dev *dn_db;
 176        struct dn_ifaddr *ifa;
 177        int res = 0;
 178
 179        rcu_read_lock();
 180        dn_db = rcu_dereference(dev->dn_ptr);
 181        if (dn_db == NULL) {
 182                printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
 183                goto out;
 184        }
 185
 186        for (ifa = rcu_dereference(dn_db->ifa_list);
 187             ifa != NULL;
 188             ifa = rcu_dereference(ifa->ifa_next))
 189                if ((addr ^ ifa->ifa_local) == 0) {
 190                        res = 1;
 191                        break;
 192                }
 193out:
 194        rcu_read_unlock();
 195        return res;
 196}
 197
 198#endif /* _NET_DN_DEV_H */
 199
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