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 ctl_name;             /* Index for sysctl                   */
79	int  (*up)(struct net_device *);
80	void (*down)(struct net_device *);
81	void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
82	void *sysctl;
83};
84
85
86struct dn_dev {
87	struct dn_ifaddr *ifa_list;
88	struct net_device *dev;
89	struct dn_dev_parms parms;
90	char use_long;
91	struct timer_list timer;
92	unsigned long t3;
93	struct neigh_parms *neigh_parms;
94	__u8 addr[ETH_ALEN];
95	struct neighbour *router; /* Default router on circuit */
96	struct neighbour *peer;   /* Peer on pointopoint links */
97	unsigned long uptime;     /* Time device went up in jiffies */
98};
99
100struct dn_short_packet
101{
102	__u8    msgflg;
103	__le16 dstnode;
104	__le16 srcnode;
105	__u8   forward;
106} __attribute__((packed));
107
108struct dn_long_packet
109{
110	__u8   msgflg;
111	__u8   d_area;
112	__u8   d_subarea;
113	__u8   d_id[6];
114	__u8   s_area;
115	__u8   s_subarea;
116	__u8   s_id[6];
117	__u8   nl2;
118	__u8   visit_ct;
119	__u8   s_class;
120	__u8   pt;
121} __attribute__((packed));
122
123/*------------------------- DRP - Routing messages ---------------------*/
124
125struct endnode_hello_message
126{
127	__u8   msgflg;
128	__u8   tiver[3];
129	__u8   id[6];
130	__u8   iinfo;
131	__le16 blksize;
132	__u8   area;
133	__u8   seed[8];
134	__u8   neighbor[6];
135	__le16 timer;
136	__u8   mpd;
137	__u8   datalen;
138	__u8   data[2];
139} __attribute__((packed));
140
141struct rtnode_hello_message
142{
143	__u8   msgflg;
144	__u8   tiver[3];
145	__u8   id[6];
146	__u8   iinfo;
147	__le16  blksize;
148	__u8   priority;
149	__u8   area;
150	__le16  timer;
151	__u8   mpd;
152} __attribute__((packed));
153
154
155extern void dn_dev_init(void);
156extern void dn_dev_cleanup(void);
157
158extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
159
160extern void dn_dev_devices_off(void);
161extern void dn_dev_devices_on(void);
162
163extern void dn_dev_init_pkt(struct sk_buff *skb);
164extern void dn_dev_veri_pkt(struct sk_buff *skb);
165extern void dn_dev_hello(struct sk_buff *skb);
166
167extern void dn_dev_up(struct net_device *);
168extern void dn_dev_down(struct net_device *);
169
170extern int dn_dev_set_default(struct net_device *dev, int force);
171extern struct net_device *dn_dev_get_default(void);
172extern int dn_dev_bind_default(__le16 *addr);
173
174extern int register_dnaddr_notifier(struct notifier_block *nb);
175extern int unregister_dnaddr_notifier(struct notifier_block *nb);
176
177static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
178{
179	struct dn_dev *dn_db = dev->dn_ptr;
180	struct dn_ifaddr *ifa;
181
182	if (dn_db == NULL) {
183		printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
184		return 0;
185	}
186
187	for(ifa = dn_db->ifa_list; ifa; ifa = ifa->ifa_next)
188		if ((addr ^ ifa->ifa_local) == 0)
189			return 1;
190
191	return 0;
192}
193
194#endif /* _NET_DN_DEV_H */
195