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59ddd965c2
There are a mix of function prototypes with and without extern in the kernel sources. Standardize on not using extern for function prototypes. Function prototypes don't need to be written with extern. extern is assumed by the compiler. Its use is as unnecessary as using auto to declare automatic/local variables in a block. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
199 lines
5.3 KiB
C
199 lines
5.3 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 __rcu *ifa_next;
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struct dn_dev *ifa_dev;
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__le16 ifa_local;
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__le16 ifa_address;
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__u8 ifa_flags;
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__u8 ifa_scope;
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char ifa_label[IFNAMSIZ];
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struct rcu_head rcu;
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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 (*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 __rcu *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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__u8 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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__u8 msgflg;
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__le16 dstnode;
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__le16 srcnode;
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__u8 forward;
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} __packed;
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struct dn_long_packet {
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__u8 msgflg;
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__u8 d_area;
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__u8 d_subarea;
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__u8 d_id[6];
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__u8 s_area;
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__u8 s_subarea;
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__u8 s_id[6];
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__u8 nl2;
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__u8 visit_ct;
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__u8 s_class;
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__u8 pt;
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} __packed;
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/*------------------------- DRP - Routing messages ---------------------*/
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struct endnode_hello_message {
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__u8 msgflg;
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__u8 tiver[3];
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__u8 id[6];
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__u8 iinfo;
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__le16 blksize;
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__u8 area;
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__u8 seed[8];
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__u8 neighbor[6];
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__le16 timer;
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__u8 mpd;
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__u8 datalen;
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__u8 data[2];
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} __packed;
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struct rtnode_hello_message {
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__u8 msgflg;
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__u8 tiver[3];
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__u8 id[6];
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__u8 iinfo;
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__le16 blksize;
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__u8 priority;
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__u8 area;
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__le16 timer;
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__u8 mpd;
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} __packed;
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void dn_dev_init(void);
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void dn_dev_cleanup(void);
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int dn_dev_ioctl(unsigned int cmd, void __user *arg);
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void dn_dev_devices_off(void);
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void dn_dev_devices_on(void);
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void dn_dev_init_pkt(struct sk_buff *skb);
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void dn_dev_veri_pkt(struct sk_buff *skb);
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void dn_dev_hello(struct sk_buff *skb);
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void dn_dev_up(struct net_device *);
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void dn_dev_down(struct net_device *);
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int dn_dev_set_default(struct net_device *dev, int force);
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struct net_device *dn_dev_get_default(void);
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int dn_dev_bind_default(__le16 *addr);
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int register_dnaddr_notifier(struct notifier_block *nb);
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int unregister_dnaddr_notifier(struct notifier_block *nb);
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static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
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{
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struct dn_dev *dn_db;
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struct dn_ifaddr *ifa;
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int res = 0;
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rcu_read_lock();
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dn_db = rcu_dereference(dev->dn_ptr);
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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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goto out;
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}
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for (ifa = rcu_dereference(dn_db->ifa_list);
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ifa != NULL;
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ifa = rcu_dereference(ifa->ifa_next))
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if ((addr ^ ifa->ifa_local) == 0) {
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res = 1;
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break;
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}
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out:
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rcu_read_unlock();
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return res;
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}
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#endif /* _NET_DN_DEV_H */
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