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