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TOMOYO Linux Cross Reference
Linux/include/net/dn_dev.h

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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 
  6 struct dn_dev;
  7 
  8 struct dn_ifaddr {
  9         struct dn_ifaddr __rcu *ifa_next;
 10         struct dn_dev    *ifa_dev;
 11         __le16            ifa_local;
 12         __le16            ifa_address;
 13         __u32             ifa_flags;
 14         __u8              ifa_scope;
 15         char              ifa_label[IFNAMSIZ];
 16         struct rcu_head   rcu;
 17 };
 18 
 19 #define DN_DEV_S_RU  0 /* Run - working normally   */
 20 #define DN_DEV_S_CR  1 /* Circuit Rejected         */
 21 #define DN_DEV_S_DS  2 /* Data Link Start          */
 22 #define DN_DEV_S_RI  3 /* Routing Layer Initialize */
 23 #define DN_DEV_S_RV  4 /* Routing Layer Verify     */
 24 #define DN_DEV_S_RC  5 /* Routing Layer Complete   */
 25 #define DN_DEV_S_OF  6 /* Off                      */
 26 #define DN_DEV_S_HA  7 /* Halt                     */
 27 
 28 
 29 /*
 30  * The dn_dev_parms structure contains the set of parameters
 31  * for each device (hence inclusion in the dn_dev structure)
 32  * and an array is used to store the default types of supported
 33  * device (in dn_dev.c).
 34  *
 35  * The type field matches the ARPHRD_ constants and is used in
 36  * searching the list for supported devices when new devices
 37  * come up.
 38  *
 39  * The mode field is used to find out if a device is broadcast,
 40  * multipoint, or pointopoint. Please note that DECnet thinks
 41  * different ways about devices to the rest of the kernel
 42  * so the normal IFF_xxx flags are invalid here. For devices
 43  * which can be any combination of the previously mentioned
 44  * attributes, you can set this on a per device basis by
 45  * installing an up() routine.
 46  *
 47  * The device state field, defines the initial state in which the
 48  * device will come up. In the dn_dev structure, it is the actual
 49  * state.
 50  *
 51  * Things have changed here. I've killed timer1 since it's a user space
 52  * issue for a user space routing deamon to sort out. The kernel does
 53  * not need to be bothered with it.
 54  *
 55  * Timers:
 56  * t2 - Rate limit timer, min time between routing and hello messages
 57  * t3 - Hello timer, send hello messages when it expires
 58  *
 59  * Callbacks:
 60  * up() - Called to initialize device, return value can veto use of
 61  *        device with DECnet.
 62  * down() - Called to turn device off when it goes down
 63  * timer3() - Called once for each ifaddr when timer 3 goes off
 64  * 
 65  * sysctl - Hook for sysctl things
 66  *
 67  */
 68 struct dn_dev_parms {
 69         int type;                 /* ARPHRD_xxx                         */
 70         int mode;                 /* Broadcast, Unicast, Mulitpoint     */
 71 #define DN_DEV_BCAST  1
 72 #define DN_DEV_UCAST  2
 73 #define DN_DEV_MPOINT 4
 74         int state;                /* Initial state                      */
 75         int forwarding;           /* 0=EndNode, 1=L1Router, 2=L2Router  */
 76         unsigned long t2;         /* Default value of t2                */
 77         unsigned long t3;         /* Default value of t3                */
 78         int priority;             /* Priority to be a router            */
 79         char *name;               /* Name for sysctl                    */
 80         int  (*up)(struct net_device *);
 81         void (*down)(struct net_device *);
 82         void (*timer3)(struct net_device *, struct dn_ifaddr *ifa);
 83         void *sysctl;
 84 };
 85 
 86 
 87 struct dn_dev {
 88         struct dn_ifaddr __rcu *ifa_list;
 89         struct net_device *dev;
 90         struct dn_dev_parms parms;
 91         char use_long;
 92         struct timer_list timer;
 93         unsigned long t3;
 94         struct neigh_parms *neigh_parms;
 95         __u8 addr[ETH_ALEN];
 96         struct neighbour *router; /* Default router on circuit */
 97         struct neighbour *peer;   /* Peer on pointopoint links */
 98         unsigned long uptime;     /* Time device went up in jiffies */
 99 };
100 
101 struct dn_short_packet {
102         __u8    msgflg;
103         __le16 dstnode;
104         __le16 srcnode;
105         __u8   forward;
106 } __packed;
107 
108 struct dn_long_packet {
109         __u8   msgflg;
110         __u8   d_area;
111         __u8   d_subarea;
112         __u8   d_id[6];
113         __u8   s_area;
114         __u8   s_subarea;
115         __u8   s_id[6];
116         __u8   nl2;
117         __u8   visit_ct;
118         __u8   s_class;
119         __u8   pt;
120 } __packed;
121 
122 /*------------------------- DRP - Routing messages ---------------------*/
123 
124 struct endnode_hello_message {
125         __u8   msgflg;
126         __u8   tiver[3];
127         __u8   id[6];
128         __u8   iinfo;
129         __le16 blksize;
130         __u8   area;
131         __u8   seed[8];
132         __u8   neighbor[6];
133         __le16 timer;
134         __u8   mpd;
135         __u8   datalen;
136         __u8   data[2];
137 } __packed;
138 
139 struct rtnode_hello_message {
140         __u8   msgflg;
141         __u8   tiver[3];
142         __u8   id[6];
143         __u8   iinfo;
144         __le16  blksize;
145         __u8   priority;
146         __u8   area;
147         __le16  timer;
148         __u8   mpd;
149 } __packed;
150 
151 
152 void dn_dev_init(void);
153 void dn_dev_cleanup(void);
154 
155 int dn_dev_ioctl(unsigned int cmd, void __user *arg);
156 
157 void dn_dev_devices_off(void);
158 void dn_dev_devices_on(void);
159 
160 void dn_dev_init_pkt(struct sk_buff *skb);
161 void dn_dev_veri_pkt(struct sk_buff *skb);
162 void dn_dev_hello(struct sk_buff *skb);
163 
164 void dn_dev_up(struct net_device *);
165 void dn_dev_down(struct net_device *);
166 
167 int dn_dev_set_default(struct net_device *dev, int force);
168 struct net_device *dn_dev_get_default(void);
169 int dn_dev_bind_default(__le16 *addr);
170 
171 int register_dnaddr_notifier(struct notifier_block *nb);
172 int unregister_dnaddr_notifier(struct notifier_block *nb);
173 
174 static inline int dn_dev_islocal(struct net_device *dev, __le16 addr)
175 {
176         struct dn_dev *dn_db;
177         struct dn_ifaddr *ifa;
178         int res = 0;
179 
180         rcu_read_lock();
181         dn_db = rcu_dereference(dev->dn_ptr);
182         if (dn_db == NULL) {
183                 printk(KERN_DEBUG "dn_dev_islocal: Called for non DECnet device\n");
184                 goto out;
185         }
186 
187         for (ifa = rcu_dereference(dn_db->ifa_list);
188              ifa != NULL;
189              ifa = rcu_dereference(ifa->ifa_next))
190                 if ((addr ^ ifa->ifa_local) == 0) {
191                         res = 1;
192                         break;
193                 }
194 out:
195         rcu_read_unlock();
196         return res;
197 }
198 
199 #endif /* _NET_DN_DEV_H */
200 

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