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         dn_address       ifa_local;
  11         dn_address       ifa_address;
  12         unsigned char    ifa_flags;
  13         unsigned char    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 ctl_name;             /* Index 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 *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         unsigned char 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 {
 102         unsigned char   msgflg          __attribute__((packed));
 103         unsigned short  dstnode         __attribute__((packed));
 104         unsigned short  srcnode         __attribute__((packed));
 105         unsigned char   forward         __attribute__((packed));
 106 };
 107
 108 struct dn_long_packet
 109 {
 110         unsigned char   msgflg          __attribute__((packed));
 111         unsigned char   d_area          __attribute__((packed));
 112         unsigned char   d_subarea       __attribute__((packed));
 113         unsigned char   d_id[6]         __attribute__((packed));
 114         unsigned char   s_area          __attribute__((packed));
 115         unsigned char   s_subarea       __attribute__((packed));
 116         unsigned char   s_id[6]         __attribute__((packed));
 117         unsigned char   nl2             __attribute__((packed));
 118         unsigned char   visit_ct        __attribute__((packed));
 119         unsigned char   s_class         __attribute__((packed));
 120         unsigned char   pt              __attribute__((packed));
 121 };
 122
 123 /*------------------------- DRP - Routing messages ---------------------*/
 124
 125 struct endnode_hello_message
 126 {
 127         unsigned char   msgflg          __attribute__((packed));
 128         unsigned char   tiver[3]        __attribute__((packed));
 129         unsigned char   id[6]           __attribute__((packed));
 130         unsigned char   iinfo           __attribute__((packed));
 131         unsigned short  blksize         __attribute__((packed));
 132         unsigned char   area            __attribute__((packed));
 133         unsigned char   seed[8]         __attribute__((packed));
 134         unsigned char   neighbor[6]     __attribute__((packed));
 135         unsigned short  timer           __attribute__((packed));
 136         unsigned char   mpd             __attribute__((packed));
 137         unsigned char   datalen         __attribute__((packed));
 138         unsigned char   data[2]         __attribute__((packed));
 139 };
 140
 141 struct rtnode_hello_message
 142 {
 143         unsigned char   msgflg          __attribute__((packed));
 144         unsigned char   tiver[3]        __attribute__((packed));
 145         unsigned char   id[6]           __attribute__((packed));
 146         unsigned char   iinfo           __attribute__((packed));
 147         unsigned short  blksize         __attribute__((packed));
 148         unsigned char   priority        __attribute__((packed));
 149         unsigned char   area            __attribute__((packed));
 150         unsigned short  timer           __attribute__((packed));
 151         unsigned char   mpd             __attribute__((packed));
 152 };
 153
 154
 155 extern void dn_dev_init(void);
 156 extern void dn_dev_cleanup(void);
 157
 158 extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
 159
 160 extern void dn_dev_devices_off(void);
 161 extern void dn_dev_devices_on(void);
 162
 163 extern void dn_dev_init_pkt(struct sk_buff *skb);
 164 extern void dn_dev_veri_pkt(struct sk_buff *skb);
 165 extern void dn_dev_hello(struct sk_buff *skb);
 166
 167 extern void dn_dev_up(struct net_device *);
 168 extern void dn_dev_down(struct net_device *);
 169
 170 extern int dn_dev_set_default(struct net_device *dev, int force);
 171 extern struct net_device *dn_dev_get_default(void);
 172 extern int dn_dev_bind_default(dn_address *addr);
 173
 174 extern int register_dnaddr_notifier(struct notifier_block *nb);
 175 extern int unregister_dnaddr_notifier(struct notifier_block *nb);
 176
 177 static inline int dn_dev_islocal(struct net_device *dev, dn_address addr)
 178 {
 179         struct dn_dev *dn_db = dev->dn_ptr;
 180         struct dn_ifaddr *ifa;
 181
 182         if (dn_db == NULL) {
 183                 printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
 184                 return 0;
 185         }
 186
 187         for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)
 188                 if ((addr ^ ifa->ifa_local) == 0)
 189                         return 1;
 190
 191         return 0;
 192 }
 193
 194 #endif /* _NET_DN_DEV_H */