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/include/net/dn_dev.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 189 lines | 123 code | 26 blank | 40 comment | 5 complexity | 2b8f62e17cf8b01a34f45361214b4b55 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1#ifndef _NET_DN_DEV_H
  2#define _NET_DN_DEV_H
  3
  4
  5struct dn_dev;
  6
  7struct dn_ifaddr {
  8	struct dn_ifaddr *ifa_next;
  9	struct dn_dev    *ifa_dev;
 10	__le16            ifa_local;
 11	__le16            ifa_address;
 12	__u8              ifa_flags;
 13	__u8              ifa_scope;
 14	char              ifa_label[IFNAMSIZ];
 15};
 16
 17#define DN_DEV_S_RU  0 /* Run - working normally   */
 18#define DN_DEV_S_CR  1 /* Circuit Rejected         */
 19#define DN_DEV_S_DS  2 /* Data Link Start          */
 20#define DN_DEV_S_RI  3 /* Routing Layer Initialize */
 21#define DN_DEV_S_RV  4 /* Routing Layer Verify     */
 22#define DN_DEV_S_RC  5 /* Routing Layer Complete   */
 23#define DN_DEV_S_OF  6 /* Off                      */
 24#define DN_DEV_S_HA  7 /* Halt                     */
 25
 26
 27/*
 28 * The dn_dev_parms structure contains the set of parameters
 29 * for each device (hence inclusion in the dn_dev structure)
 30 * and an array is used to store the default types of supported
 31 * device (in dn_dev.c).
 32 *
 33 * The type field matches the ARPHRD_ constants and is used in
 34 * searching the list for supported devices when new devices
 35 * come up.
 36 *
 37 * The mode field is used to find out if a device is broadcast,
 38 * multipoint, or pointopoint. Please note that DECnet thinks
 39 * different ways about devices to the rest of the kernel
 40 * so the normal IFF_xxx flags are invalid here. For devices
 41 * which can be any combination of the previously mentioned
 42 * attributes, you can set this on a per device basis by
 43 * installing an up() routine.
 44 *
 45 * The device state field, defines the initial state in which the
 46 * device will come up. In the dn_dev structure, it is the actual
 47 * state.
 48 *
 49 * Things have changed here. I've killed timer1 since it's a user space
 50 * issue for a user space routing deamon to sort out. The kernel does
 51 * not need to be bothered with it.
 52 *
 53 * Timers:
 54 * t2 - Rate limit timer, min time between routing and hello messages
 55 * t3 - Hello timer, send hello messages when it expires
 56 *
 57 * Callbacks:
 58 * up() - Called to initialize device, return value can veto use of
 59 *        device with DECnet.
 60 * down() - Called to turn device off when it goes down
 61 * timer3() - Called once for each ifaddr when timer 3 goes off
 62 * 
 63 * sysctl - Hook for sysctl things
 64 *
 65 */
 66struct dn_dev_parms {
 67	int type;	          /* ARPHRD_xxx                         */
 68	int mode;	          /* Broadcast, Unicast, Mulitpoint     */
 69#define DN_DEV_BCAST  1
 70#define DN_DEV_UCAST  2
 71#define DN_DEV_MPOINT 4
 72	int state;                /* Initial state                      */
 73	int forwarding;	          /* 0=EndNode, 1=L1Router, 2=L2Router  */
 74	unsigned long t2;         /* Default value of t2                */
 75	unsigned long t3;         /* Default value of t3                */
 76	int priority;             /* Priority to be a router            */
 77	char *name;               /* Name for sysctl                    */
 78	int  (*up)(struct net_device *);
 79	void (*down)(struct net_device *);
 80	void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
 81	void *sysctl;
 82};
 83
 84
 85struct dn_dev {
 86	struct dn_ifaddr *ifa_list;
 87	struct net_device *dev;
 88	struct dn_dev_parms parms;
 89	char use_long;
 90	struct timer_list timer;
 91	unsigned long t3;
 92	struct neigh_parms *neigh_parms;
 93	__u8 addr[ETH_ALEN];
 94	struct neighbour *router; /* Default router on circuit */
 95	struct neighbour *peer;   /* Peer on pointopoint links */
 96	unsigned long uptime;     /* Time device went up in jiffies */
 97};
 98
 99struct dn_short_packet {
100	__u8    msgflg;
101	__le16 dstnode;
102	__le16 srcnode;
103	__u8   forward;
104} __attribute__((packed));
105
106struct dn_long_packet {
107	__u8   msgflg;
108	__u8   d_area;
109	__u8   d_subarea;
110	__u8   d_id[6];
111	__u8   s_area;
112	__u8   s_subarea;
113	__u8   s_id[6];
114	__u8   nl2;
115	__u8   visit_ct;
116	__u8   s_class;
117	__u8   pt;
118} __attribute__((packed));
119
120/*------------------------- DRP - Routing messages ---------------------*/
121
122struct endnode_hello_message {
123	__u8   msgflg;
124	__u8   tiver[3];
125	__u8   id[6];
126	__u8   iinfo;
127	__le16 blksize;
128	__u8   area;
129	__u8   seed[8];
130	__u8   neighbor[6];
131	__le16 timer;
132	__u8   mpd;
133	__u8   datalen;
134	__u8   data[2];
135} __attribute__((packed));
136
137struct rtnode_hello_message {
138	__u8   msgflg;
139	__u8   tiver[3];
140	__u8   id[6];
141	__u8   iinfo;
142	__le16  blksize;
143	__u8   priority;
144	__u8   area;
145	__le16  timer;
146	__u8   mpd;
147} __attribute__((packed));
148
149
150extern void dn_dev_init(void);
151extern void dn_dev_cleanup(void);
152
153extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
154
155extern void dn_dev_devices_off(void);
156extern void dn_dev_devices_on(void);
157
158extern void dn_dev_init_pkt(struct sk_buff *skb);
159extern void dn_dev_veri_pkt(struct sk_buff *skb);
160extern void dn_dev_hello(struct sk_buff *skb);
161
162extern void dn_dev_up(struct net_device *);
163extern void dn_dev_down(struct net_device *);
164
165extern int dn_dev_set_default(struct net_device *dev, int force);
166extern struct net_device *dn_dev_get_default(void);
167extern int dn_dev_bind_default(__le16 *addr);
168
169extern int register_dnaddr_notifier(struct notifier_block *nb);
170extern int unregister_dnaddr_notifier(struct notifier_block *nb);
171
172static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
173{
174	struct dn_dev *dn_db = dev->dn_ptr;
175	struct dn_ifaddr *ifa;
176
177	if (dn_db == NULL) {
178		printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
179		return 0;
180	}
181
182	for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)
183		if ((addr ^ ifa->ifa_local) == 0)
184			return 1;
185
186	return 0;
187}
188
189#endif /* _NET_DN_DEV_H */