atalk.h 5.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209
  1. #ifndef __LINUX_ATALK_H__
  2. #define __LINUX_ATALK_H__
  3. #include <asm/byteorder.h>
  4. /*
  5. * AppleTalk networking structures
  6. *
  7. * The following are directly referenced from the University Of Michigan
  8. * netatalk for compatibility reasons.
  9. */
  10. #define ATPORT_FIRST 1
  11. #define ATPORT_RESERVED 128
  12. #define ATPORT_LAST 254 /* 254 is only legal on localtalk */
  13. #define ATADDR_ANYNET (__u16)0
  14. #define ATADDR_ANYNODE (__u8)0
  15. #define ATADDR_ANYPORT (__u8)0
  16. #define ATADDR_BCAST (__u8)255
  17. #define DDP_MAXSZ 587
  18. #define DDP_MAXHOPS 15 /* 4 bits of hop counter */
  19. #define SIOCATALKDIFADDR (SIOCPROTOPRIVATE + 0)
  20. struct atalk_addr {
  21. __be16 s_net;
  22. __u8 s_node;
  23. };
  24. struct sockaddr_at {
  25. sa_family_t sat_family;
  26. __u8 sat_port;
  27. struct atalk_addr sat_addr;
  28. char sat_zero[8];
  29. };
  30. struct atalk_netrange {
  31. __u8 nr_phase;
  32. __be16 nr_firstnet;
  33. __be16 nr_lastnet;
  34. };
  35. #ifdef __KERNEL__
  36. #include <net/sock.h>
  37. struct atalk_route {
  38. struct net_device *dev;
  39. struct atalk_addr target;
  40. struct atalk_addr gateway;
  41. int flags;
  42. struct atalk_route *next;
  43. };
  44. /**
  45. * struct atalk_iface - AppleTalk Interface
  46. * @dev - Network device associated with this interface
  47. * @address - Our address
  48. * @status - What are we doing?
  49. * @nets - Associated direct netrange
  50. * @next - next element in the list of interfaces
  51. */
  52. struct atalk_iface {
  53. struct net_device *dev;
  54. struct atalk_addr address;
  55. int status;
  56. #define ATIF_PROBE 1 /* Probing for an address */
  57. #define ATIF_PROBE_FAIL 2 /* Probe collided */
  58. struct atalk_netrange nets;
  59. struct atalk_iface *next;
  60. };
  61. struct atalk_sock {
  62. /* struct sock has to be the first member of atalk_sock */
  63. struct sock sk;
  64. __be16 dest_net;
  65. __be16 src_net;
  66. unsigned char dest_node;
  67. unsigned char src_node;
  68. unsigned char dest_port;
  69. unsigned char src_port;
  70. };
  71. static inline struct atalk_sock *at_sk(struct sock *sk)
  72. {
  73. return (struct atalk_sock *)sk;
  74. }
  75. #include <asm/byteorder.h>
  76. struct ddpehdr {
  77. __be16 deh_len_hops; /* lower 10 bits are length, next 4 - hops */
  78. __be16 deh_sum;
  79. __be16 deh_dnet;
  80. __be16 deh_snet;
  81. __u8 deh_dnode;
  82. __u8 deh_snode;
  83. __u8 deh_dport;
  84. __u8 deh_sport;
  85. /* And netatalk apps expect to stick the type in themselves */
  86. };
  87. static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
  88. {
  89. return (struct ddpehdr *)skb->h.raw;
  90. }
  91. /* AppleTalk AARP headers */
  92. struct elapaarp {
  93. __be16 hw_type;
  94. #define AARP_HW_TYPE_ETHERNET 1
  95. #define AARP_HW_TYPE_TOKENRING 2
  96. __be16 pa_type;
  97. __u8 hw_len;
  98. __u8 pa_len;
  99. #define AARP_PA_ALEN 4
  100. __be16 function;
  101. #define AARP_REQUEST 1
  102. #define AARP_REPLY 2
  103. #define AARP_PROBE 3
  104. __u8 hw_src[ETH_ALEN];
  105. __u8 pa_src_zero;
  106. __be16 pa_src_net;
  107. __u8 pa_src_node;
  108. __u8 hw_dst[ETH_ALEN];
  109. __u8 pa_dst_zero;
  110. __be16 pa_dst_net;
  111. __u8 pa_dst_node;
  112. } __attribute__ ((packed));
  113. static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
  114. {
  115. return (struct elapaarp *)skb->h.raw;
  116. }
  117. /* Not specified - how long till we drop a resolved entry */
  118. #define AARP_EXPIRY_TIME (5 * 60 * HZ)
  119. /* Size of hash table */
  120. #define AARP_HASH_SIZE 16
  121. /* Fast retransmission timer when resolving */
  122. #define AARP_TICK_TIME (HZ / 5)
  123. /* Send 10 requests then give up (2 seconds) */
  124. #define AARP_RETRANSMIT_LIMIT 10
  125. /*
  126. * Some value bigger than total retransmit time + a bit for last reply to
  127. * appear and to stop continual requests
  128. */
  129. #define AARP_RESOLVE_TIME (10 * HZ)
  130. extern struct datalink_proto *ddp_dl, *aarp_dl;
  131. extern void aarp_proto_init(void);
  132. /* Inter module exports */
  133. /* Give a device find its atif control structure */
  134. static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
  135. {
  136. return dev->atalk_ptr;
  137. }
  138. extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
  139. extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
  140. extern int aarp_send_ddp(struct net_device *dev,
  141. struct sk_buff *skb,
  142. struct atalk_addr *sa, void *hwaddr);
  143. extern void aarp_device_down(struct net_device *dev);
  144. extern void aarp_probe_network(struct atalk_iface *atif);
  145. extern int aarp_proxy_probe_network(struct atalk_iface *atif,
  146. struct atalk_addr *sa);
  147. extern void aarp_proxy_remove(struct net_device *dev,
  148. struct atalk_addr *sa);
  149. extern void aarp_cleanup_module(void);
  150. extern struct hlist_head atalk_sockets;
  151. extern rwlock_t atalk_sockets_lock;
  152. extern struct atalk_route *atalk_routes;
  153. extern rwlock_t atalk_routes_lock;
  154. extern struct atalk_iface *atalk_interfaces;
  155. extern rwlock_t atalk_interfaces_lock;
  156. extern struct atalk_route atrtr_default;
  157. extern const struct file_operations atalk_seq_arp_fops;
  158. extern int sysctl_aarp_expiry_time;
  159. extern int sysctl_aarp_tick_time;
  160. extern int sysctl_aarp_retransmit_limit;
  161. extern int sysctl_aarp_resolve_time;
  162. #ifdef CONFIG_SYSCTL
  163. extern void atalk_register_sysctl(void);
  164. extern void atalk_unregister_sysctl(void);
  165. #else
  166. #define atalk_register_sysctl() do { } while(0)
  167. #define atalk_unregister_sysctl() do { } while(0)
  168. #endif
  169. #ifdef CONFIG_PROC_FS
  170. extern int atalk_proc_init(void);
  171. extern void atalk_proc_exit(void);
  172. #else
  173. #define atalk_proc_init() ({ 0; })
  174. #define atalk_proc_exit() do { } while(0)
  175. #endif /* CONFIG_PROC_FS */
  176. #endif /* __KERNEL__ */
  177. #endif /* __LINUX_ATALK_H__ */