/* SPDX-License-Identifier: GPL-2.0 */#ifndef _NET_DN_DEV_H#define _NET_DN_DEV_H #include <linux/netdevice.h> struct dn_dev; struct dn_ifaddr {	struct dn_ifaddr __rcu *ifa_next;	struct dn_dev    *ifa_dev;	__le16            ifa_local;	__le16            ifa_address;	__u32             ifa_flags;	__u8              ifa_scope;	char              ifa_label[IFNAMSIZ];	struct rcu_head   rcu;}; #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 __rcu *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;} __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;} __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];} __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;} __packed;  void dn_dev_init(void);void dn_dev_cleanup(void); int dn_dev_ioctl(unsigned int cmd, void __user *arg); void dn_dev_devices_off(void);void dn_dev_devices_on(void); void dn_dev_init_pkt(struct sk_buff *skb);void dn_dev_veri_pkt(struct sk_buff *skb);void dn_dev_hello(struct sk_buff *skb); void dn_dev_up(struct net_device *);void dn_dev_down(struct net_device *); int dn_dev_set_default(struct net_device *dev, int force);struct net_device *dn_dev_get_default(void);int dn_dev_bind_default(__le16 *addr); int register_dnaddr_notifier(struct notifier_block *nb);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;	struct dn_ifaddr *ifa;	int res = 0; 	rcu_read_lock();	dn_db = rcu_dereference(dev->dn_ptr);	if (dn_db == NULL) {		printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");		goto out;	} 	for (ifa = rcu_dereference(dn_db->ifa_list);	     ifa != NULL;	     ifa = rcu_dereference(ifa->ifa_next))		if ((addr ^ ifa->ifa_local) == 0) {			res = 1;			break;		}out:	rcu_read_unlock();	return res;} #endif /* _NET_DN_DEV_H */