Viewing file:  dn_dev.h (6.73 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#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.
*
* Things have changed here. I've killed timer1 since its 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 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 short blksize; /* Block Size */
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 net_device *);
void (*down)(struct net_device *);
void (*timer3)(struct net_device *);
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;
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 net_device *);
extern void dn_dev_down(struct net_device *);
extern struct net_device *decnet_default_device;
static __inline__ int dn_dev_islocal(struct net_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 */
|