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 __rcu *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	struct rcu_head   rcu;
16};
17
18#define DN_DEV_S_RU  0 /* Run - working normally   */
19#define DN_DEV_S_CR  1 /* Circuit Rejected         */
20#define DN_DEV_S_DS  2 /* Data Link Start          */
21#define DN_DEV_S_RI  3 /* Routing Layer Initialize */
22#define DN_DEV_S_RV  4 /* Routing Layer Verify     */
23#define DN_DEV_S_RC  5 /* Routing Layer Complete   */
24#define DN_DEV_S_OF  6 /* Off                      */
25#define DN_DEV_S_HA  7 /* Halt                     */
26
27
28/*
29 * The dn_dev_parms structure contains the set of parameters
30 * for each device (hence inclusion in the dn_dev structure)
31 * and an array is used to store the default types of supported
32 * device (in dn_dev.c).
33 *
34 * The type field matches the ARPHRD_ constants and is used in
35 * searching the list for supported devices when new devices
36 * come up.
37 *
38 * The mode field is used to find out if a device is broadcast,
39 * multipoint, or pointopoint. Please note that DECnet thinks
40 * different ways about devices to the rest of the kernel
41 * so the normal IFF_xxx flags are invalid here. For devices
42 * which can be any combination of the previously mentioned
43 * attributes, you can set this on a per device basis by
44 * installing an up() routine.
45 *
46 * The device state field, defines the initial state in which the
47 * device will come up. In the dn_dev structure, it is the actual
48 * state.
49 *
50 * Things have changed here. I've killed timer1 since it's a user space
51 * issue for a user space routing deamon to sort out. The kernel does
52 * not need to be bothered with it.
53 *
54 * Timers:
55 * t2 - Rate limit timer, min time between routing and hello messages
56 * t3 - Hello timer, send hello messages when it expires
57 *
58 * Callbacks:
59 * up() - Called to initialize device, return value can veto use of
60 *        device with DECnet.
61 * down() - Called to turn device off when it goes down
62 * timer3() - Called once for each ifaddr when timer 3 goes off
63 *
64 * sysctl - Hook for sysctl things
65 *
66 */
67struct dn_dev_parms {
68	int type;	          /* ARPHRD_xxx                         */
69	int mode;	          /* Broadcast, Unicast, Mulitpoint     */
70#define DN_DEV_BCAST  1
71#define DN_DEV_UCAST  2
72#define DN_DEV_MPOINT 4
73	int state;                /* Initial state                      */
74	int forwarding;	          /* 0=EndNode, 1=L1Router, 2=L2Router  */
75	unsigned long t2;         /* Default value of t2                */
76	unsigned long t3;         /* Default value of t3                */
77	int priority;             /* Priority to be a router            */
78	char *name;               /* Name 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 __rcu *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	__u8    msgflg;
102	__le16 dstnode;
103	__le16 srcnode;
104	__u8   forward;
105} __packed;
106
107struct dn_long_packet {
108	__u8   msgflg;
109	__u8   d_area;
110	__u8   d_subarea;
111	__u8   d_id[6];
112	__u8   s_area;
113	__u8   s_subarea;
114	__u8   s_id[6];
115	__u8   nl2;
116	__u8   visit_ct;
117	__u8   s_class;
118	__u8   pt;
119} __packed;
120
121/*------------------------- DRP - Routing messages ---------------------*/
122
123struct endnode_hello_message {
124	__u8   msgflg;
125	__u8   tiver[3];
126	__u8   id[6];
127	__u8   iinfo;
128	__le16 blksize;
129	__u8   area;
130	__u8   seed[8];
131	__u8   neighbor[6];
132	__le16 timer;
133	__u8   mpd;
134	__u8   datalen;
135	__u8   data[2];
136} __packed;
137
138struct rtnode_hello_message {
139	__u8   msgflg;
140	__u8   tiver[3];
141	__u8   id[6];
142	__u8   iinfo;
143	__le16  blksize;
144	__u8   priority;
145	__u8   area;
146	__le16  timer;
147	__u8   mpd;
148} __packed;
149
150
151extern void dn_dev_init(void);
152extern void dn_dev_cleanup(void);
153
154extern int dn_dev_ioctl(unsigned int cmd, void __user *arg);
155
156extern void dn_dev_devices_off(void);
157extern void dn_dev_devices_on(void);
158
159extern void dn_dev_init_pkt(struct sk_buff *skb);
160extern void dn_dev_veri_pkt(struct sk_buff *skb);
161extern void dn_dev_hello(struct sk_buff *skb);
162
163extern void dn_dev_up(struct net_device *);
164extern void dn_dev_down(struct net_device *);
165
166extern int dn_dev_set_default(struct net_device *dev, int force);
167extern struct net_device *dn_dev_get_default(void);
168extern int dn_dev_bind_default(__le16 *addr);
169
170extern int register_dnaddr_notifier(struct notifier_block *nb);
171extern int unregister_dnaddr_notifier(struct notifier_block *nb);
172
173static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
174{
175	struct dn_dev *dn_db;
176	struct dn_ifaddr *ifa;
177	int res = 0;
178
179	rcu_read_lock();
180	dn_db = rcu_dereference(dev->dn_ptr);
181	if (dn_db == NULL) {
182		printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
183		goto out;
184	}
185
186	for (ifa = rcu_dereference(dn_db->ifa_list);
187	     ifa != NULL;
188	     ifa = rcu_dereference(ifa->ifa_next))
189		if ((addr ^ ifa->ifa_local) == 0) {
190			res = 1;
191			break;
192		}
193out:
194	rcu_read_unlock();
195	return res;
196}
197
198#endif /* _NET_DN_DEV_H */
199