atalk.h 4.5 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef __LINUX_ATALK_H__
  3. #define __LINUX_ATALK_H__
  4. #include <net/sock.h>
  5. #include <uapi/linux/atalk.h>
  6. struct atalk_route {
  7. struct net_device *dev;
  8. struct atalk_addr target;
  9. struct atalk_addr gateway;
  10. int flags;
  11. struct atalk_route *next;
  12. };
  13. /**
  14. * struct atalk_iface - AppleTalk Interface
  15. * @dev - Network device associated with this interface
  16. * @address - Our address
  17. * @status - What are we doing?
  18. * @nets - Associated direct netrange
  19. * @next - next element in the list of interfaces
  20. */
  21. struct atalk_iface {
  22. struct net_device *dev;
  23. struct atalk_addr address;
  24. int status;
  25. #define ATIF_PROBE 1 /* Probing for an address */
  26. #define ATIF_PROBE_FAIL 2 /* Probe collided */
  27. struct atalk_netrange nets;
  28. struct atalk_iface *next;
  29. };
  30. struct atalk_sock {
  31. /* struct sock has to be the first member of atalk_sock */
  32. struct sock sk;
  33. __be16 dest_net;
  34. __be16 src_net;
  35. unsigned char dest_node;
  36. unsigned char src_node;
  37. unsigned char dest_port;
  38. unsigned char src_port;
  39. };
  40. static inline struct atalk_sock *at_sk(struct sock *sk)
  41. {
  42. return (struct atalk_sock *)sk;
  43. }
  44. struct ddpehdr {
  45. __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */
  46. __be16 deh_sum;
  47. __be16 deh_dnet;
  48. __be16 deh_snet;
  49. __u8 deh_dnode;
  50. __u8 deh_snode;
  51. __u8 deh_dport;
  52. __u8 deh_sport;
  53. /* And netatalk apps expect to stick the type in themselves */
  54. };
  55. static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
  56. {
  57. return (struct ddpehdr *)skb_transport_header(skb);
  58. }
  59. /* AppleTalk AARP headers */
  60. struct elapaarp {
  61. __be16 hw_type;
  62. #define AARP_HW_TYPE_ETHERNET 1
  63. #define AARP_HW_TYPE_TOKENRING 2
  64. __be16 pa_type;
  65. __u8 hw_len;
  66. __u8 pa_len;
  67. #define AARP_PA_ALEN 4
  68. __be16 function;
  69. #define AARP_REQUEST 1
  70. #define AARP_REPLY 2
  71. #define AARP_PROBE 3
  72. __u8 hw_src[ETH_ALEN];
  73. __u8 pa_src_zero;
  74. __be16 pa_src_net;
  75. __u8 pa_src_node;
  76. __u8 hw_dst[ETH_ALEN];
  77. __u8 pa_dst_zero;
  78. __be16 pa_dst_net;
  79. __u8 pa_dst_node;
  80. } __attribute__ ((packed));
  81. static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
  82. {
  83. return (struct elapaarp *)skb_transport_header(skb);
  84. }
  85. /* Not specified - how long till we drop a resolved entry */
  86. #define AARP_EXPIRY_TIME (5 * 60 * HZ)
  87. /* Size of hash table */
  88. #define AARP_HASH_SIZE 16
  89. /* Fast retransmission timer when resolving */
  90. #define AARP_TICK_TIME (HZ / 5)
  91. /* Send 10 requests then give up (2 seconds) */
  92. #define AARP_RETRANSMIT_LIMIT 10
  93. /*
  94. * Some value bigger than total retransmit time + a bit for last reply to
  95. * appear and to stop continual requests
  96. */
  97. #define AARP_RESOLVE_TIME (10 * HZ)
  98. extern struct datalink_proto *ddp_dl, *aarp_dl;
  99. extern int aarp_proto_init(void);
  100. /* Inter module exports */
  101. /* Give a device find its atif control structure */
  102. #if IS_ENABLED(CONFIG_ATALK)
  103. static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
  104. {
  105. return dev->atalk_ptr;
  106. }
  107. #endif
  108. extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
  109. extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
  110. extern int aarp_send_ddp(struct net_device *dev,
  111. struct sk_buff *skb,
  112. struct atalk_addr *sa, void *hwaddr);
  113. extern void aarp_device_down(struct net_device *dev);
  114. extern void aarp_probe_network(struct atalk_iface *atif);
  115. extern int aarp_proxy_probe_network(struct atalk_iface *atif,
  116. struct atalk_addr *sa);
  117. extern void aarp_proxy_remove(struct net_device *dev,
  118. struct atalk_addr *sa);
  119. extern void aarp_cleanup_module(void);
  120. extern struct hlist_head atalk_sockets;
  121. extern rwlock_t atalk_sockets_lock;
  122. extern struct atalk_route *atalk_routes;
  123. extern rwlock_t atalk_routes_lock;
  124. extern struct atalk_iface *atalk_interfaces;
  125. extern rwlock_t atalk_interfaces_lock;
  126. extern struct atalk_route atrtr_default;
  127. struct aarp_iter_state {
  128. int bucket;
  129. struct aarp_entry **table;
  130. };
  131. extern const struct seq_operations aarp_seq_ops;
  132. extern int sysctl_aarp_expiry_time;
  133. extern int sysctl_aarp_tick_time;
  134. extern int sysctl_aarp_retransmit_limit;
  135. extern int sysctl_aarp_resolve_time;
  136. #ifdef CONFIG_SYSCTL
  137. extern int atalk_register_sysctl(void);
  138. extern void atalk_unregister_sysctl(void);
  139. #else
  140. static inline int atalk_register_sysctl(void)
  141. {
  142. return 0;
  143. }
  144. static inline void atalk_unregister_sysctl(void)
  145. {
  146. }
  147. #endif
  148. #ifdef CONFIG_PROC_FS
  149. extern int atalk_proc_init(void);
  150. extern void atalk_proc_exit(void);
  151. #else
  152. static inline int atalk_proc_init(void)
  153. {
  154. return 0;
  155. }
  156. static inline void atalk_proc_exit(void)
  157. {
  158. }
  159. #endif /* CONFIG_PROC_FS */
  160. #endif /* __LINUX_ATALK_H__ */