200 lines
5.4 KiB
C
200 lines
5.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#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;
|
|
__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 */
|