195 lines
7.0 KiB
C
195 lines
7.0 KiB
C
#ifndef _NET_DN_DEV_H
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#define _NET_DN_DEV_H
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struct dn_dev;
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struct dn_ifaddr {
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struct dn_ifaddr *ifa_next;
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struct dn_dev *ifa_dev;
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dn_address ifa_local;
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dn_address ifa_address;
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unsigned char ifa_flags;
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unsigned char ifa_scope;
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char ifa_label[IFNAMSIZ];
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};
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#define DN_DEV_S_RU 0 /* Run - working normally */
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#define DN_DEV_S_CR 1 /* Circuit Rejected */
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#define DN_DEV_S_DS 2 /* Data Link Start */
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#define DN_DEV_S_RI 3 /* Routing Layer Initialize */
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#define DN_DEV_S_RV 4 /* Routing Layer Verify */
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#define DN_DEV_S_RC 5 /* Routing Layer Complete */
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#define DN_DEV_S_OF 6 /* Off */
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#define DN_DEV_S_HA 7 /* Halt */
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/*
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* The dn_dev_parms structure contains the set of parameters
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* for each device (hence inclusion in the dn_dev structure)
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* and an array is used to store the default types of supported
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* device (in dn_dev.c).
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*
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* The type field matches the ARPHRD_ constants and is used in
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* searching the list for supported devices when new devices
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* come up.
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*
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* The mode field is used to find out if a device is broadcast,
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* multipoint, or pointopoint. Please note that DECnet thinks
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* different ways about devices to the rest of the kernel
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* so the normal IFF_xxx flags are invalid here. For devices
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* which can be any combination of the previously mentioned
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* attributes, you can set this on a per device basis by
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* installing an up() routine.
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*
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* The device state field, defines the initial state in which the
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* device will come up. In the dn_dev structure, it is the actual
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* state.
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*
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* Things have changed here. I've killed timer1 since it's a user space
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* issue for a user space routing deamon to sort out. The kernel does
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* not need to be bothered with it.
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*
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* Timers:
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* t2 - Rate limit timer, min time between routing and hello messages
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* t3 - Hello timer, send hello messages when it expires
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*
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* Callbacks:
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* up() - Called to initialize device, return value can veto use of
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* device with DECnet.
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* down() - Called to turn device off when it goes down
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* timer3() - Called once for each ifaddr when timer 3 goes off
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*
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* sysctl - Hook for sysctl things
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*
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*/
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struct dn_dev_parms {
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int type; /* ARPHRD_xxx */
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int mode; /* Broadcast, Unicast, Mulitpoint */
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#define DN_DEV_BCAST 1
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#define DN_DEV_UCAST 2
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#define DN_DEV_MPOINT 4
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int state; /* Initial state */
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int forwarding; /* 0=EndNode, 1=L1Router, 2=L2Router */
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unsigned long t2; /* Default value of t2 */
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unsigned long t3; /* Default value of t3 */
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int priority; /* Priority to be a router */
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char *name; /* Name for sysctl */
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int ctl_name; /* Index for sysctl */
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int (*up)(struct net_device *);
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void (*down)(struct net_device *);
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void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
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void *sysctl;
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};
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struct dn_dev {
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struct dn_ifaddr *ifa_list;
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struct net_device *dev;
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struct dn_dev_parms parms;
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char use_long;
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struct timer_list timer;
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unsigned long t3;
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struct neigh_parms *neigh_parms;
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unsigned char addr[ETH_ALEN];
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struct neighbour *router; /* Default router on circuit */
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struct neighbour *peer; /* Peer on pointopoint links */
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unsigned long uptime; /* Time device went up in jiffies */
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};
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struct dn_short_packet
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{
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unsigned char msgflg __attribute__((packed));
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unsigned short dstnode __attribute__((packed));
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unsigned short srcnode __attribute__((packed));
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unsigned char forward __attribute__((packed));
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};
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struct dn_long_packet
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{
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unsigned char msgflg __attribute__((packed));
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unsigned char d_area __attribute__((packed));
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unsigned char d_subarea __attribute__((packed));
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unsigned char d_id[6] __attribute__((packed));
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unsigned char s_area __attribute__((packed));
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unsigned char s_subarea __attribute__((packed));
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unsigned char s_id[6] __attribute__((packed));
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unsigned char nl2 __attribute__((packed));
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unsigned char visit_ct __attribute__((packed));
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unsigned char s_class __attribute__((packed));
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unsigned char pt __attribute__((packed));
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};
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/*------------------------- DRP - Routing messages ---------------------*/
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struct endnode_hello_message
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{
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unsigned char msgflg __attribute__((packed));
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unsigned char tiver[3] __attribute__((packed));
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unsigned char id[6] __attribute__((packed));
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unsigned char iinfo __attribute__((packed));
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unsigned short blksize __attribute__((packed));
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unsigned char area __attribute__((packed));
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unsigned char seed[8] __attribute__((packed));
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unsigned char neighbor[6] __attribute__((packed));
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unsigned short timer __attribute__((packed));
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unsigned char mpd __attribute__((packed));
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unsigned char datalen __attribute__((packed));
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unsigned char data[2] __attribute__((packed));
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};
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struct rtnode_hello_message
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{
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unsigned char msgflg __attribute__((packed));
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unsigned char tiver[3] __attribute__((packed));
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unsigned char id[6] __attribute__((packed));
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unsigned char iinfo __attribute__((packed));
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unsigned short blksize __attribute__((packed));
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unsigned char priority __attribute__((packed));
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unsigned char area __attribute__((packed));
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unsigned short timer __attribute__((packed));
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unsigned char mpd __attribute__((packed));
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};
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extern void dn_dev_init(void);
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extern void dn_dev_cleanup(void);
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extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
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extern void dn_dev_devices_off(void);
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extern void dn_dev_devices_on(void);
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extern void dn_dev_init_pkt(struct sk_buff *skb);
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extern void dn_dev_veri_pkt(struct sk_buff *skb);
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extern void dn_dev_hello(struct sk_buff *skb);
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extern void dn_dev_up(struct net_device *);
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extern void dn_dev_down(struct net_device *);
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extern int dn_dev_set_default(struct net_device *dev, int force);
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extern struct net_device *dn_dev_get_default(void);
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extern int dn_dev_bind_default(dn_address *addr);
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extern int register_dnaddr_notifier(struct notifier_block *nb);
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extern int unregister_dnaddr_notifier(struct notifier_block *nb);
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static inline int dn_dev_islocal(struct net_device *dev, dn_address addr)
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{
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struct dn_dev *dn_db = dev->dn_ptr;
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struct dn_ifaddr *ifa;
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if (dn_db == NULL) {
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printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
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return 0;
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}
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for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)
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if ((addr ^ ifa->ifa_local) == 0)
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return 1;
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return 0;
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}
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#endif /* _NET_DN_DEV_H */
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