linux/include/net/dn_dev.h at master · fabgithub/linux · GitHub

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#ifndef _NET_DN_DEV_H

#define _NET_DN_DEV_H

struct dn_dev;

struct dn_ifaddr {

struct dn_ifaddr __rcu *ifa_next;

struct dn_dev *ifa_dev;

__le16 ifa_local;

__le16 ifa_address;

__u8 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;

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;

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 */

linux/include/net/dn_dev.h at master · fabgithub/linux · GitHub

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