1 #ifndef _NET_DN_DEV_H
2 #define _NET_DN_DEV_H
3
4
5 struct dn_dev;
6
7 struct 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 */
65 struct 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
86 struct 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
100 struct dn_short_packet
101 {
102 unsigned char msgflg;
103 unsigned short dstnode __attribute__((packed));
104 unsigned short srcnode __attribute__((packed));
105 unsigned char forward;
106 };
107
108 struct dn_long_packet
109 {
110 unsigned char msgflg;
111 unsigned char d_area;
112 unsigned char d_subarea;
113 unsigned char d_id[6];
114 unsigned char s_area;
115 unsigned char s_subarea;
116 unsigned char s_id[6];
117 unsigned char nl2;
118 unsigned char visit_ct;
119 unsigned char s_class;
120 unsigned char pt;
121 };
122
123 /*------------------------- DRP - Routing messages ---------------------*/
124
125 struct endnode_hello_message
126 {
127 unsigned char msgflg;
128 unsigned char tiver[3];
129 unsigned char id[6];
130 unsigned char iinfo;
131 unsigned short blksize __attribute__((packed));
132 unsigned char area;
133 unsigned char seed[8];
134 unsigned char neighbor[6];
135 unsigned short timer __attribute__((packed));
136 unsigned char mpd;
137 unsigned char datalen;
138 unsigned char data[2];
139 };
140
141 struct rtnode_hello_message
142 {
143 unsigned char msgflg;
144 unsigned char tiver[3];
145 unsigned char id[6];
146 unsigned char iinfo;
147 unsigned short blksize __attribute__((packed));
148 unsigned char priority;
149 unsigned char area;
150 unsigned short timer __attribute__((packed));
151 unsigned char mpd;
152 };
153
154
155 extern void dn_dev_init(void);
156 extern void dn_dev_cleanup(void);
157
158 extern int dn_dev_ioctl(unsigned int cmd, void *arg);
159
160 extern void dn_dev_devices_off(void);
161 extern void dn_dev_devices_on(void);
162
163 extern void dn_dev_init_pkt(struct sk_buff *skb);
164 extern void dn_dev_veri_pkt(struct sk_buff *skb);
165 extern void dn_dev_hello(struct sk_buff *skb);
166
167 extern void dn_dev_up(struct net_device *);
168 extern void dn_dev_down(struct net_device *);
169
170 extern struct net_device *decnet_default_device;
171
dn_dev_islocal(struct net_device * dev,dn_address addr)172 static __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