Edit File: dn_dev.h
#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 */