dn_dev.h
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:7k
- #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 devicen");
- 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 */