diff options
Diffstat (limited to 'include/net/dn_dev.h')
| -rw-r--r-- | include/net/dn_dev.h | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/include/net/dn_dev.h b/include/net/dn_dev.h new file mode 100644 index 000000000..595b4f6c1 --- /dev/null +++ b/include/net/dn_dev.h @@ -0,0 +1,199 @@ +/* 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 */ |