netrom.h 7.9 KB

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  1. /*
  2. * Declarations of NET/ROM type objects.
  3. *
  4. * Jonathan Naylor G4KLX 9/4/95
  5. */
  6. #ifndef _NETROM_H
  7. #define _NETROM_H
  8. #include <linux/netrom.h>
  9. #include <linux/list.h>
  10. #include <net/sock.h>
  11. #define NR_NETWORK_LEN 15
  12. #define NR_TRANSPORT_LEN 5
  13. #define NR_PROTO_IP 0x0C
  14. #define NR_PROTOEXT 0x00
  15. #define NR_CONNREQ 0x01
  16. #define NR_CONNACK 0x02
  17. #define NR_DISCREQ 0x03
  18. #define NR_DISCACK 0x04
  19. #define NR_INFO 0x05
  20. #define NR_INFOACK 0x06
  21. #define NR_RESET 0x07
  22. #define NR_CHOKE_FLAG 0x80
  23. #define NR_NAK_FLAG 0x40
  24. #define NR_MORE_FLAG 0x20
  25. /* Define Link State constants. */
  26. enum {
  27. NR_STATE_0,
  28. NR_STATE_1,
  29. NR_STATE_2,
  30. NR_STATE_3
  31. };
  32. #define NR_COND_ACK_PENDING 0x01
  33. #define NR_COND_REJECT 0x02
  34. #define NR_COND_PEER_RX_BUSY 0x04
  35. #define NR_COND_OWN_RX_BUSY 0x08
  36. #define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */
  37. #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */
  38. #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */
  39. #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */
  40. #define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */
  41. #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */
  42. #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */
  43. #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */
  44. #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */
  45. #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */
  46. #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */
  47. #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */
  48. #define NR_MODULUS 256
  49. #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */
  50. #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */
  51. struct nr_private {
  52. struct net_device_stats stats;
  53. };
  54. struct nr_sock {
  55. struct sock sock;
  56. ax25_address user_addr, source_addr, dest_addr;
  57. struct net_device *device;
  58. unsigned char my_index, my_id;
  59. unsigned char your_index, your_id;
  60. unsigned char state, condition, bpqext, window;
  61. unsigned short vs, vr, va, vl;
  62. unsigned char n2, n2count;
  63. unsigned long t1, t2, t4, idle;
  64. unsigned short fraglen;
  65. struct timer_list t1timer;
  66. struct timer_list t2timer;
  67. struct timer_list t4timer;
  68. struct timer_list idletimer;
  69. struct sk_buff_head ack_queue;
  70. struct sk_buff_head reseq_queue;
  71. struct sk_buff_head frag_queue;
  72. };
  73. #define nr_sk(sk) ((struct nr_sock *)(sk))
  74. struct nr_neigh {
  75. struct hlist_node neigh_node;
  76. ax25_address callsign;
  77. ax25_digi *digipeat;
  78. ax25_cb *ax25;
  79. struct net_device *dev;
  80. unsigned char quality;
  81. unsigned char locked;
  82. unsigned short count;
  83. unsigned int number;
  84. unsigned char failed;
  85. atomic_t refcount;
  86. };
  87. struct nr_route {
  88. unsigned char quality;
  89. unsigned char obs_count;
  90. struct nr_neigh *neighbour;
  91. };
  92. struct nr_node {
  93. struct hlist_node node_node;
  94. ax25_address callsign;
  95. char mnemonic[7];
  96. unsigned char which;
  97. unsigned char count;
  98. struct nr_route routes[3];
  99. atomic_t refcount;
  100. spinlock_t node_lock;
  101. };
  102. /*********************************************************************
  103. * nr_node & nr_neigh lists, refcounting and locking
  104. *********************************************************************/
  105. #define nr_node_hold(__nr_node) \
  106. atomic_inc(&((__nr_node)->refcount))
  107. static __inline__ void nr_node_put(struct nr_node *nr_node)
  108. {
  109. if (atomic_dec_and_test(&nr_node->refcount)) {
  110. kfree(nr_node);
  111. }
  112. }
  113. #define nr_neigh_hold(__nr_neigh) \
  114. atomic_inc(&((__nr_neigh)->refcount))
  115. static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
  116. {
  117. if (atomic_dec_and_test(&nr_neigh->refcount)) {
  118. kfree(nr_neigh->digipeat);
  119. kfree(nr_neigh);
  120. }
  121. }
  122. /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
  123. */
  124. static __inline__ void nr_node_lock(struct nr_node *nr_node)
  125. {
  126. nr_node_hold(nr_node);
  127. spin_lock_bh(&nr_node->node_lock);
  128. }
  129. static __inline__ void nr_node_unlock(struct nr_node *nr_node)
  130. {
  131. spin_unlock_bh(&nr_node->node_lock);
  132. nr_node_put(nr_node);
  133. }
  134. #define nr_neigh_for_each(__nr_neigh, node, list) \
  135. hlist_for_each_entry(__nr_neigh, node, list, neigh_node)
  136. #define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \
  137. hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node)
  138. #define nr_node_for_each(__nr_node, node, list) \
  139. hlist_for_each_entry(__nr_node, node, list, node_node)
  140. #define nr_node_for_each_safe(__nr_node, node, node2, list) \
  141. hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node)
  142. /*********************************************************************/
  143. /* af_netrom.c */
  144. extern int sysctl_netrom_default_path_quality;
  145. extern int sysctl_netrom_obsolescence_count_initialiser;
  146. extern int sysctl_netrom_network_ttl_initialiser;
  147. extern int sysctl_netrom_transport_timeout;
  148. extern int sysctl_netrom_transport_maximum_tries;
  149. extern int sysctl_netrom_transport_acknowledge_delay;
  150. extern int sysctl_netrom_transport_busy_delay;
  151. extern int sysctl_netrom_transport_requested_window_size;
  152. extern int sysctl_netrom_transport_no_activity_timeout;
  153. extern int sysctl_netrom_routing_control;
  154. extern int sysctl_netrom_link_fails_count;
  155. extern int sysctl_netrom_reset_circuit;
  156. extern int nr_rx_frame(struct sk_buff *, struct net_device *);
  157. extern void nr_destroy_socket(struct sock *);
  158. /* nr_dev.c */
  159. extern int nr_rx_ip(struct sk_buff *, struct net_device *);
  160. extern void nr_setup(struct net_device *);
  161. /* nr_in.c */
  162. extern int nr_process_rx_frame(struct sock *, struct sk_buff *);
  163. /* nr_loopback.c */
  164. extern void nr_loopback_init(void);
  165. extern void nr_loopback_clear(void);
  166. extern int nr_loopback_queue(struct sk_buff *);
  167. /* nr_out.c */
  168. extern void nr_output(struct sock *, struct sk_buff *);
  169. extern void nr_send_nak_frame(struct sock *);
  170. extern void nr_kick(struct sock *);
  171. extern void nr_transmit_buffer(struct sock *, struct sk_buff *);
  172. extern void nr_establish_data_link(struct sock *);
  173. extern void nr_enquiry_response(struct sock *);
  174. extern void nr_check_iframes_acked(struct sock *, unsigned short);
  175. /* nr_route.c */
  176. extern void nr_rt_device_down(struct net_device *);
  177. extern struct net_device *nr_dev_first(void);
  178. extern struct net_device *nr_dev_get(ax25_address *);
  179. extern int nr_rt_ioctl(unsigned int, void __user *);
  180. extern void nr_link_failed(ax25_cb *, int);
  181. extern int nr_route_frame(struct sk_buff *, ax25_cb *);
  182. extern const struct file_operations nr_nodes_fops;
  183. extern const struct file_operations nr_neigh_fops;
  184. extern void nr_rt_free(void);
  185. /* nr_subr.c */
  186. extern void nr_clear_queues(struct sock *);
  187. extern void nr_frames_acked(struct sock *, unsigned short);
  188. extern void nr_requeue_frames(struct sock *);
  189. extern int nr_validate_nr(struct sock *, unsigned short);
  190. extern int nr_in_rx_window(struct sock *, unsigned short);
  191. extern void nr_write_internal(struct sock *, int);
  192. extern void __nr_transmit_reply(struct sk_buff *skb, int mine,
  193. unsigned char cmdflags);
  194. /*
  195. * This routine is called when a Connect Acknowledge with the Choke Flag
  196. * set is needed to refuse a connection.
  197. */
  198. #define nr_transmit_refusal(skb, mine) \
  199. do { \
  200. __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
  201. } while (0)
  202. /*
  203. * This routine is called when we don't have a circuit matching an incoming
  204. * NET/ROM packet. This is an G8PZT Xrouter extension.
  205. */
  206. #define nr_transmit_reset(skb, mine) \
  207. do { \
  208. __nr_transmit_reply((skb), (mine), NR_RESET); \
  209. } while (0)
  210. extern void nr_disconnect(struct sock *, int);
  211. /* nr_timer.c */
  212. extern void nr_init_timers(struct sock *sk);
  213. extern void nr_start_heartbeat(struct sock *);
  214. extern void nr_start_t1timer(struct sock *);
  215. extern void nr_start_t2timer(struct sock *);
  216. extern void nr_start_t4timer(struct sock *);
  217. extern void nr_start_idletimer(struct sock *);
  218. extern void nr_stop_heartbeat(struct sock *);
  219. extern void nr_stop_t1timer(struct sock *);
  220. extern void nr_stop_t2timer(struct sock *);
  221. extern void nr_stop_t4timer(struct sock *);
  222. extern void nr_stop_idletimer(struct sock *);
  223. extern int nr_t1timer_running(struct sock *);
  224. /* sysctl_net_netrom.c */
  225. extern void nr_register_sysctl(void);
  226. extern void nr_unregister_sysctl(void);
  227. #endif