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	dn_address       ifa_local;
11	unsigned char    ifa_flags;
12	unsigned char    ifa_scope;
13	char             ifa_label[IFNAMSIZ];
14};
15
16#define DN_DEV_S_RU  0 /* Run - working normally   */
17#define DN_DEV_S_CR  1 /* Circuit Rejected         */
18#define DN_DEV_S_DS  2 /* Data Link Start          */
19#define DN_DEV_S_RI  3 /* Routing Layer Initialize */
20#define DN_DEV_S_RV  4 /* Routing Layer Verify     */
21#define DN_DEV_S_RC  5 /* Routing Layer Complete   */
22#define DN_DEV_S_OF  6 /* Off                      */
23#define DN_DEV_S_HA  7 /* Halt                     */
24
25
26/*
27 * The dn_dev_parms structure contains the set of parameters
28 * for each device (hence inclusion in the dn_dev structure)
29 * and an array is used to store the default types of supported
30 * device (in dn_dev.c).
31 *
32 * The type field matches the ARPHRD_ constants and is used in
33 * searching the list for supported devices when new devices
34 * come up.
35 *
36 * The mode field is used to find out if a device is broadcast,
37 * multipoint, or pointopoint. Please note that DECnet thinks
38 * different ways about devices to the rest of the kernel
39 * so the normal IFF_xxx flags are invalid here. For devices
40 * which can be any combination of the previously mentioned
41 * attributes, you can set this on a per device basis by
42 * installing an up() routine.
43 *
44 * The device state field, defines the initial state in which the
45 * device will come up. In the dn_dev structure, it is the actual
46 * state.
47 *
48 * Things have changed here. I've killed timer1 since its a user space
49 * issue for a user space routing deamon to sort out. The kernel does
50 * not need to be bothered with it.
51 *
52 * Timers:
53 * t2 - Rate limit timer, min time between routing and hello messages
54 * t3 - Hello timer, send hello messages when it expires
55 *
56 * Callbacks:
57 * up() - Called to initialize device, return value can veto use of
58 *        device with DECnet.
59 * down() - Called to turn device off when it goes down
60 * timer3() - Called when timer 3 goes off
61 *
62 * sysctl - Hook for sysctl things
63 *
64 */
65struct dn_dev_parms {
66	int type;	          /* ARPHRD_xxx                         */
67	int mode;	          /* Broadcast, Unicast, Mulitpoint     */
68#define DN_DEV_BCAST  1
69#define DN_DEV_UCAST  2
70#define DN_DEV_MPOINT 4
71	int state;                /* Initial state                      */
72	int forwarding;	          /* 0=EndNode, 1=L1Router, 2=L2Router  */
73	unsigned short blksize;   /* Block Size                         */
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 *);
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	unsigned char 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	unsigned char   msgflg          __attribute__((packed));
103        unsigned short  dstnode         __attribute__((packed));
104        unsigned short  srcnode         __attribute__((packed));
105        unsigned char   forward         __attribute__((packed));
106};
107
108struct dn_long_packet
109{
110	unsigned char   msgflg          __attribute__((packed));
111        unsigned char   d_area          __attribute__((packed));
112        unsigned char   d_subarea       __attribute__((packed));
113        unsigned char   d_id[6]         __attribute__((packed));
114        unsigned char   s_area          __attribute__((packed));
115        unsigned char   s_subarea       __attribute__((packed));
116        unsigned char   s_id[6]         __attribute__((packed));
117        unsigned char   nl2             __attribute__((packed));
118        unsigned char   visit_ct        __attribute__((packed));
119        unsigned char   s_class         __attribute__((packed));
120        unsigned char   pt              __attribute__((packed));
121};
122
123/*------------------------- DRP - Routing messages ---------------------*/
124
125struct endnode_hello_message
126{
127	unsigned char   msgflg          __attribute__((packed));
128        unsigned char   tiver[3]        __attribute__((packed));
129        unsigned char   id[6]           __attribute__((packed));
130        unsigned char   iinfo           __attribute__((packed));
131        unsigned short  blksize         __attribute__((packed));
132        unsigned char   area            __attribute__((packed));
133        unsigned char   seed[8]         __attribute__((packed));
134        unsigned char   neighbor[6]     __attribute__((packed));
135        unsigned short  timer           __attribute__((packed));
136        unsigned char   mpd             __attribute__((packed));
137        unsigned char   datalen         __attribute__((packed));
138        unsigned char   data[2]         __attribute__((packed));
139};
140
141struct rtnode_hello_message
142{
143	unsigned char   msgflg          __attribute__((packed));
144        unsigned char   tiver[3]        __attribute__((packed));
145        unsigned char   id[6]           __attribute__((packed));
146        unsigned char   iinfo           __attribute__((packed));
147        unsigned short  blksize         __attribute__((packed));
148        unsigned char   priority        __attribute__((packed));
149        unsigned char   area            __attribute__((packed));
150        unsigned short  timer           __attribute__((packed));
151        unsigned char   mpd             __attribute__((packed));
152};
153
154
155extern void dn_dev_init(void);
156extern void dn_dev_cleanup(void);
157
158extern int dn_dev_ioctl(unsigned int cmd, void *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 struct net_device *decnet_default_device;
171
172static __inline__ int dn_dev_islocal(struct net_device *dev, dn_address 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 */
190