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 __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 */
66 struct 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
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 __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
100 struct dn_short_packet
101 {
102 __u8 msgflg;
103 __le16 dstnode;
104 __le16 srcnode;
105 __u8 forward;
106 } __attribute__((packed));
107
108 struct 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
125 struct 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
141 struct 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
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 __user *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 int dn_dev_set_default(struct net_device *dev, int force);
171 extern struct net_device *dn_dev_get_default(void);
172 extern int dn_dev_bind_default(__le16 *addr);
173
174 extern int register_dnaddr_notifier(struct notifier_block *nb);
175 extern int unregister_dnaddr_notifier(struct notifier_block *nb);
176
dn_dev_islocal(struct net_device * dev,__le16 addr)177 static 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