Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _NET_DN_DEV_H
3#define _NET_DN_DEV_H
4
5#include <linux/netdevice.h>
6
7struct dn_dev;
8
9struct dn_ifaddr {
10 struct dn_ifaddr __rcu *ifa_next;
11 struct dn_dev *ifa_dev;
12 __le16 ifa_local;
13 __le16 ifa_address;
14 __u32 ifa_flags;
15 __u8 ifa_scope;
16 char ifa_label[IFNAMSIZ];
17 struct rcu_head rcu;
18};
19
20#define DN_DEV_S_RU 0 /* Run - working normally */
21#define DN_DEV_S_CR 1 /* Circuit Rejected */
22#define DN_DEV_S_DS 2 /* Data Link Start */
23#define DN_DEV_S_RI 3 /* Routing Layer Initialize */
24#define DN_DEV_S_RV 4 /* Routing Layer Verify */
25#define DN_DEV_S_RC 5 /* Routing Layer Complete */
26#define DN_DEV_S_OF 6 /* Off */
27#define DN_DEV_S_HA 7 /* Halt */
28
29
30/*
31 * The dn_dev_parms structure contains the set of parameters
32 * for each device (hence inclusion in the dn_dev structure)
33 * and an array is used to store the default types of supported
34 * device (in dn_dev.c).
35 *
36 * The type field matches the ARPHRD_ constants and is used in
37 * searching the list for supported devices when new devices
38 * come up.
39 *
40 * The mode field is used to find out if a device is broadcast,
41 * multipoint, or pointopoint. Please note that DECnet thinks
42 * different ways about devices to the rest of the kernel
43 * so the normal IFF_xxx flags are invalid here. For devices
44 * which can be any combination of the previously mentioned
45 * attributes, you can set this on a per device basis by
46 * installing an up() routine.
47 *
48 * The device state field, defines the initial state in which the
49 * device will come up. In the dn_dev structure, it is the actual
50 * state.
51 *
52 * Things have changed here. I've killed timer1 since it's a user space
53 * issue for a user space routing deamon to sort out. The kernel does
54 * not need to be bothered with it.
55 *
56 * Timers:
57 * t2 - Rate limit timer, min time between routing and hello messages
58 * t3 - Hello timer, send hello messages when it expires
59 *
60 * Callbacks:
61 * up() - Called to initialize device, return value can veto use of
62 * device with DECnet.
63 * down() - Called to turn device off when it goes down
64 * timer3() - Called once for each ifaddr when timer 3 goes off
65 *
66 * sysctl - Hook for sysctl things
67 *
68 */
69struct dn_dev_parms {
70 int type; /* ARPHRD_xxx */
71 int mode; /* Broadcast, Unicast, Mulitpoint */
72#define DN_DEV_BCAST 1
73#define DN_DEV_UCAST 2
74#define DN_DEV_MPOINT 4
75 int state; /* Initial state */
76 int forwarding; /* 0=EndNode, 1=L1Router, 2=L2Router */
77 unsigned long t2; /* Default value of t2 */
78 unsigned long t3; /* Default value of t3 */
79 int priority; /* Priority to be a router */
80 char *name; /* Name for sysctl */
81 int (*up)(struct net_device *);
82 void (*down)(struct net_device *);
83 void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
84 void *sysctl;
85};
86
87
88struct dn_dev {
89 struct dn_ifaddr __rcu *ifa_list;
90 struct net_device *dev;
91 struct dn_dev_parms parms;
92 char use_long;
93 struct timer_list timer;
94 unsigned long t3;
95 struct neigh_parms *neigh_parms;
96 __u8 addr[ETH_ALEN];
97 struct neighbour *router; /* Default router on circuit */
98 struct neighbour *peer; /* Peer on pointopoint links */
99 unsigned long uptime; /* Time device went up in jiffies */
100};
101
102struct dn_short_packet {
103 __u8 msgflg;
104 __le16 dstnode;
105 __le16 srcnode;
106 __u8 forward;
107} __packed;
108
109struct dn_long_packet {
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} __packed;
122
123/*------------------------- DRP - Routing messages ---------------------*/
124
125struct endnode_hello_message {
126 __u8 msgflg;
127 __u8 tiver[3];
128 __u8 id[6];
129 __u8 iinfo;
130 __le16 blksize;
131 __u8 area;
132 __u8 seed[8];
133 __u8 neighbor[6];
134 __le16 timer;
135 __u8 mpd;
136 __u8 datalen;
137 __u8 data[2];
138} __packed;
139
140struct rtnode_hello_message {
141 __u8 msgflg;
142 __u8 tiver[3];
143 __u8 id[6];
144 __u8 iinfo;
145 __le16 blksize;
146 __u8 priority;
147 __u8 area;
148 __le16 timer;
149 __u8 mpd;
150} __packed;
151
152
153void dn_dev_init(void);
154void dn_dev_cleanup(void);
155
156int dn_dev_ioctl(unsigned int cmd, void __user *arg);
157
158void dn_dev_devices_off(void);
159void dn_dev_devices_on(void);
160
161void dn_dev_init_pkt(struct sk_buff *skb);
162void dn_dev_veri_pkt(struct sk_buff *skb);
163void dn_dev_hello(struct sk_buff *skb);
164
165void dn_dev_up(struct net_device *);
166void dn_dev_down(struct net_device *);
167
168int dn_dev_set_default(struct net_device *dev, int force);
169struct net_device *dn_dev_get_default(void);
170int dn_dev_bind_default(__le16 *addr);
171
172int register_dnaddr_notifier(struct notifier_block *nb);
173int unregister_dnaddr_notifier(struct notifier_block *nb);
174
175static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
176{
177 struct dn_dev *dn_db;
178 struct dn_ifaddr *ifa;
179 int res = 0;
180
181 rcu_read_lock();
182 dn_db = rcu_dereference(dev->dn_ptr);
183 if (dn_db == NULL) {
184 printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
185 goto out;
186 }
187
188 for (ifa = rcu_dereference(dn_db->ifa_list);
189 ifa != NULL;
190 ifa = rcu_dereference(ifa->ifa_next))
191 if ((addr ^ ifa->ifa_local) == 0) {
192 res = 1;
193 break;
194 }
195out:
196 rcu_read_unlock();
197 return res;
198}
199
200#endif /* _NET_DN_DEV_H */