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