patch-2.3.4 linux/include/net/dn_dev.h

• Lines: 195
• Date: Wed May 26 09:36:35 1999
• Orig file: v2.3.3/linux/include/net/dn_dev.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.3/linux/include/net/dn_dev.h linux/include/net/dn_dev.h
@@ -0,0 +1,194 @@
+#ifndef _NET_DN_DEV_H
+#define _NET_DN_DEV_H
+
+
+struct dn_dev;
+
+struct dn_ifaddr {
+	struct dn_ifaddr *ifa_next;
+	struct dn_dev    *ifa_dev;
+	dn_address       ifa_local;
+	unsigned char    ifa_flags;
+	unsigned char    ifa_scope;
+	char             ifa_label[IFNAMSIZ];
+};
+
+#define DN_DEV_S_RU  0 /* Run - working normally   */
+#define DN_DEV_S_CR  1 /* Circuit Rejected         */
+#define DN_DEV_S_DS  2 /* Data Link Start          */
+#define DN_DEV_S_RI  3 /* Routing Layer Initialize */
+#define DN_DEV_S_RV  4 /* Routing Layer Verify     */
+#define DN_DEV_S_RC  5 /* Routing Layer Complete   */
+#define DN_DEV_S_OF  6 /* Off                      */
+#define DN_DEV_S_HA  7 /* Halt                     */
+
+
+/*
+ * The dn_dev_parms structure contains the set of parameters
+ * for each device (hence inclusion in the dn_dev structure)
+ * and an array is used to store the default types of supported
+ * device (in dn_dev.c).
+ *
+ * The type field matches the ARPHRD_ constants and is used in
+ * searching the list for supported devices when new devices
+ * come up.
+ *
+ * The mode field is used to find out if a device is broadcast,
+ * multipoint, or pointopoint. Please note that DECnet thinks
+ * different ways about devices to the rest of the kernel
+ * so the normal IFF_xxx flags are invalid here. For devices
+ * which can be any combination of the previously mentioned
+ * attributes, you can set this on a per device basis by
+ * installing an up() routine.
+ *
+ * The device state field, defines the initial state in which the
+ * device will come up. In the dn_dev structure, it is the actual
+ * state.
+ *
+ * The cost field is used in the routing algorithm.
+ *
+ * Timers:
+ * t1 - Routing timer, send routing messages when it expires
+ * t2 - Rate limit timer, min time between routing and hello messages
+ * t3 - Hello timer, send hello messages when it expires
+ *
+ * Callbacks:
+ * up() - Called to initialize device, return value can veto use of
+ *        device with DECnet.
+ * down() - Called to turn device off when it goes down
+ * timer1() - Called when timer 1 goes off
+ * timer3() - Called when timer 3 goes off
+ * setsrc() - Called for each incomming frame to set previous hop info
+ * neigh_setup() - Called to do device specific setup of neighbours
+ * 
+ * sysctl - Hook for sysctl things
+ *
+ */
+struct dn_dev_parms {
+	int type;	          /* ARPHRD_xxx                     */
+	int mode;	          /* Broadcast, Unicast, Mulitpoint */
+#define DN_DEV_BCAST  1
+#define DN_DEV_UCAST  2
+#define DN_DEV_MPOINT 4
+	int state;                /* Initial state                  */
+	int cost;	          /* Default cost of device         */
+	unsigned short blksize;   /* Block Size                     */
+	unsigned long t1;         /* Default value of t1            */
+	unsigned long t2;         /* Default value of t2            */
+	unsigned long t3;         /* Default value of t3            */
+	int priority;             /* Priority to be a router        */
+	char *name;               /* Name for sysctl                */
+	int ctl_name;             /* Index for sysctl               */
+	int  (*up)(struct device *);
+	void (*down)(struct device *);
+	void (*timer1)(struct device *);
+	void (*timer3)(struct device *);
+	int (*setsrc)(struct sk_buff *skb);
+	int (*neigh_setup)(struct neighbour *);
+	void *sysctl;
+};
+
+
+struct dn_dev {
+	struct dn_ifaddr *ifa_list;
+	struct device *dev;
+	struct dn_dev_parms parms;
+	char use_long;
+        struct timer_list timer;
+        unsigned long t3, t1;
+	struct neigh_parms *neigh_parms;
+	unsigned char addr[ETH_ALEN];
+	struct neighbour *router; /* Default router on circuit */
+	struct neighbour *peer;   /* Peer on pointopoint links */
+	unsigned long uptime;     /* Time device went up in jiffies */
+};
+
+struct dn_short_packet
+{
+	unsigned char   msgflg          __attribute__((packed));
+        unsigned short  dstnode         __attribute__((packed));
+        unsigned short  srcnode         __attribute__((packed));
+        unsigned char   forward         __attribute__((packed));
+};
+
+struct dn_long_packet
+{
+	unsigned char   msgflg          __attribute__((packed));
+        unsigned char   d_area          __attribute__((packed));
+        unsigned char   d_subarea       __attribute__((packed));
+        unsigned char   d_id[6]         __attribute__((packed));
+        unsigned char   s_area          __attribute__((packed));
+        unsigned char   s_subarea       __attribute__((packed));
+        unsigned char   s_id[6]         __attribute__((packed));
+        unsigned char   nl2             __attribute__((packed));
+        unsigned char   visit_ct        __attribute__((packed));
+        unsigned char   s_class         __attribute__((packed));
+        unsigned char   pt              __attribute__((packed));
+};
+
+/*------------------------- DRP - Routing messages ---------------------*/
+
+        struct endnode_hello_message
+        {
+                unsigned char   msgflg          __attribute__((packed));
+                unsigned char   tiver[3]        __attribute__((packed));
+                unsigned char   id[6]           __attribute__((packed));
+                unsigned char   iinfo           __attribute__((packed));
+                unsigned short  blksize         __attribute__((packed));
+                unsigned char   area            __attribute__((packed));
+                unsigned char   seed[8]         __attribute__((packed));
+                unsigned char   neighbor[6]     __attribute__((packed));
+                unsigned short  timer           __attribute__((packed));
+                unsigned char   mpd             __attribute__((packed));
+                unsigned char   datalen         __attribute__((packed));
+                unsigned char   data[2]         __attribute__((packed));
+        };
+        struct rtnode_hello_message
+        {
+                unsigned char   msgflg          __attribute__((packed));
+                unsigned char   tiver[3]        __attribute__((packed));
+                unsigned char   id[6]           __attribute__((packed));
+                unsigned char   iinfo           __attribute__((packed));
+                unsigned short  blksize         __attribute__((packed));
+                unsigned char   priority        __attribute__((packed));
+                unsigned char   area            __attribute__((packed));
+                unsigned short  timer           __attribute__((packed));
+                unsigned char   mpd             __attribute__((packed));
+        };
+
+
+extern void dn_dev_init(void);
+extern void dn_dev_cleanup(void);
+
+extern int dn_dev_ioctl(unsigned int cmd, void *arg);
+
+extern void dn_dev_devices_off(void);
+extern void dn_dev_devices_on(void);
+
+extern void dn_dev_init_pkt(struct sk_buff *skb);
+extern void dn_dev_veri_pkt(struct sk_buff *skb);
+extern void dn_dev_hello(struct sk_buff *skb);
+
+extern void dn_dev_up(struct device *);
+extern void dn_dev_down(struct device *);
+
+extern struct device *decnet_default_device;
+
+static __inline__ int dn_dev_islocal(struct device *dev, dn_address addr)
+{
+	struct dn_dev *dn_db = dev->dn_ptr;
+	struct dn_ifaddr *ifa;
+
+	if (dn_db == NULL) {
+		printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
+		return 0;
+	}
+
+	for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)
+		if ((addr ^ ifa->ifa_local) == 0)
+			return 1;
+
+	return 0;
+}
+
+#endif /* _NET_DN_DEV_H */