include/net/dn_dev.h

   1 #ifndef _NET_DN_DEV_H
   2 #define _NET_DN_DEV_H
   3
   4
   5 struct dn_dev;
   6
   7 struct dn_ifaddr {
   8         struct dn_ifaddr __rcu *ifa_next;
   9         struct dn_dev    *ifa_dev;
  10         __le16            ifa_local;
  11         __le16            ifa_address;
  12         __u32             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  */
  67 struct 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
  86 struct 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
 100 struct dn_short_packet {
 101         __u8    msgflg;
 102         __le16 dstnode;
 103         __le16 srcnode;
 104         __u8   forward;
 105 } __packed;
 106
 107 struct 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
 123 struct 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
 138 struct 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
 151 void dn_dev_init(void);
 152 void dn_dev_cleanup(void);
 153
 154 int dn_dev_ioctl(unsigned int cmd, void __user *arg);
 155
 156 void dn_dev_devices_off(void);
 157 void dn_dev_devices_on(void);
 158
 159 void dn_dev_init_pkt(struct sk_buff *skb);
 160 void dn_dev_veri_pkt(struct sk_buff *skb);
 161 void dn_dev_hello(struct sk_buff *skb);
 162
 163 void dn_dev_up(struct net_device *);
 164 void dn_dev_down(struct net_device *);
 165
 166 int dn_dev_set_default(struct net_device *dev, int force);
 167 struct net_device *dn_dev_get_default(void);
 168 int dn_dev_bind_default(__le16 *addr);
 169
 170 int register_dnaddr_notifier(struct notifier_block *nb);
 171 int unregister_dnaddr_notifier(struct notifier_block *nb);
 172
 173 static 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                 }
 193 out:
 194         rcu_read_unlock();
 195         return res;
 196 }
 197
 198 #endif /* _NET_DN_DEV_H */