[deliverable/linux.git] / include / net / dn_dev.h

#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;
	__le16            ifa_local;
	__le16            ifa_address;
	__u8              ifa_flags;
	__u8              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.
 *
 * Things have changed here. I've killed timer1 since it's a user space
 * issue for a user space routing deamon to sort out. The kernel does
 * not need to be bothered with it.
 *
 * Timers:
 * 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
 * timer3() - Called once for each ifaddr when timer 3 goes off
 * 
 * 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 forwarding;	          /* 0=EndNode, 1=L1Router, 2=L2Router  */
	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  (*up)(struct net_device *);
	void (*down)(struct net_device *);
	void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
	void *sysctl;
};


struct dn_dev {
	struct dn_ifaddr *ifa_list;
	struct net_device *dev;
	struct dn_dev_parms parms;
	char use_long;
	struct timer_list timer;
	unsigned long t3;
	struct neigh_parms *neigh_parms;
	__u8 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
{
	__u8    msgflg;
	__le16 dstnode;
	__le16 srcnode;
	__u8   forward;
} __attribute__((packed));

struct dn_long_packet
{
	__u8   msgflg;
	__u8   d_area;
	__u8   d_subarea;
	__u8   d_id[6];
	__u8   s_area;
	__u8   s_subarea;
	__u8   s_id[6];
	__u8   nl2;
	__u8   visit_ct;
	__u8   s_class;
	__u8   pt;
} __attribute__((packed));

/*------------------------- DRP - Routing messages ---------------------*/

struct endnode_hello_message
{
	__u8   msgflg;
	__u8   tiver[3];
	__u8   id[6];
	__u8   iinfo;
	__le16 blksize;
	__u8   area;
	__u8   seed[8];
	__u8   neighbor[6];
	__le16 timer;
	__u8   mpd;
	__u8   datalen;
	__u8   data[2];
} __attribute__((packed));

struct rtnode_hello_message
{
	__u8   msgflg;
	__u8   tiver[3];
	__u8   id[6];
	__u8   iinfo;
	__le16  blksize;
	__u8   priority;
	__u8   area;
	__le16  timer;
	__u8   mpd;
} __attribute__((packed));


extern void dn_dev_init(void);
extern void dn_dev_cleanup(void);

extern int dn_dev_ioctl(unsigned int cmd, void __user *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 net_device *);
extern void dn_dev_down(struct net_device *);

extern int dn_dev_set_default(struct net_device *dev, int force);
extern struct net_device *dn_dev_get_default(void);
extern int dn_dev_bind_default(__le16 *addr);

extern int register_dnaddr_notifier(struct notifier_block *nb);
extern int unregister_dnaddr_notifier(struct notifier_block *nb);

static inline int dn_dev_islocal(struct net_device *dev, __le16 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 */
Commit	Line	Data
1da177e4 LT	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;
c4ea94ab SW	10	__le16 ifa_local;
	11	__le16 ifa_address;
	12	__u8 ifa_flags;
	13	__u8 ifa_scope;
	14	char ifa_label[IFNAMSIZ];
1da177e4 LT	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 */
1da177e4 LT	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;
6a878184 JB	90	struct timer_list timer;
6a878184 JB	91	unsigned long t3;
1da177e4	92	struct neigh_parms *neigh_parms;
c4ea94ab	93	__u8 addr[ETH_ALEN];
1da177e4 LT	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	{
c4ea94ab SW	101	__u8 msgflg;
	102	__le16 dstnode;
	103	__le16 srcnode;
	104	__u8 forward;
6a878184	105	} __attribute__((packed));
1da177e4 LT	106
	107	struct dn_long_packet
	108	{
c4ea94ab SW	109	__u8 msgflg;
	110	__u8 d_area;
	111	__u8 d_subarea;
	112	__u8 d_id[6];
	113	__u8 s_area;
	114	__u8 s_subarea;
	115	__u8 s_id[6];
	116	__u8 nl2;
	117	__u8 visit_ct;
	118	__u8 s_class;
	119	__u8 pt;
6a878184	120	} __attribute__((packed));
1da177e4 LT	121
	122	/------------------------- DRP - Routing messages ---------------------/
	123
	124	struct endnode_hello_message
	125	{
c4ea94ab SW	126	__u8 msgflg;
	127	__u8 tiver[3];
	128	__u8 id[6];
	129	__u8 iinfo;
	130	__le16 blksize;
	131	__u8 area;
	132	__u8 seed[8];
	133	__u8 neighbor[6];
	134	__le16 timer;
	135	__u8 mpd;
	136	__u8 datalen;
	137	__u8 data[2];
6a878184	138	} __attribute__((packed));
1da177e4 LT	139
	140	struct rtnode_hello_message
	141	{
c4ea94ab SW	142	__u8 msgflg;
	143	__u8 tiver[3];
	144	__u8 id[6];
	145	__u8 iinfo;
	146	__le16 blksize;
	147	__u8 priority;
	148	__u8 area;
	149	__le16 timer;
	150	__u8 mpd;
6a878184	151	} __attribute__((packed));
1da177e4 LT	152
	153
	154	extern void dn_dev_init(void);
	155	extern void dn_dev_cleanup(void);
	156
	157	extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
	158
	159	extern void dn_dev_devices_off(void);
	160	extern void dn_dev_devices_on(void);
	161
	162	extern void dn_dev_init_pkt(struct sk_buff *skb);
	163	extern void dn_dev_veri_pkt(struct sk_buff *skb);
	164	extern void dn_dev_hello(struct sk_buff *skb);
	165
	166	extern void dn_dev_up(struct net_device *);
	167	extern void dn_dev_down(struct net_device *);
	168
	169	extern int dn_dev_set_default(struct net_device *dev, int force);
	170	extern struct net_device *dn_dev_get_default(void);
c4ea94ab	171	extern int dn_dev_bind_default(__le16 *addr);
1da177e4 LT	172
	173	extern int register_dnaddr_notifier(struct notifier_block *nb);
	174	extern int unregister_dnaddr_notifier(struct notifier_block *nb);
	175
c4ea94ab	176	static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
1da177e4 LT	177	{
	178	struct dn_dev *dn_db = dev->dn_ptr;
	179	struct dn_ifaddr *ifa;
	180
	181	if (dn_db == NULL) {
	182	printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
	183	return 0;
	184	}
	185
	186	for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)
	187	if ((addr ^ ifa->ifa_local) == 0)
	188	return 1;
	189
	190	return 0;
	191	}
	192
	193	#endif /* _NET_DN_DEV_H */