include/linux/atalk.h

   1 /*
   2  *      Appletalk networking structures
   3  *
   4  *      The following are directly referenced from the University Of Michigan
   5  *      netatalk for compatibility reasons.
   6  */
   7
   8 #ifndef __LINUX_ATALK_H__
   9 #define __LINUX_ATALK_H__
  10
  11 #define ATPORT_FIRST    1
  12 #define ATPORT_RESERVED 128
  13 #define ATPORT_LAST     255
  14 #define ATADDR_ANYNET   (__u16)0
  15 #define ATADDR_ANYNODE  (__u8)0
  16 #define ATADDR_ANYPORT  (__u8)0
  17 #define ATADDR_BCAST    (__u8)255
  18 #define DDP_MAXSZ       587
  19
  20 struct at_addr
  21 {
  22         __u16   s_net;
  23         __u8    s_node;
  24 };
  25
  26 struct sockaddr_at
  27 {
  28         sa_family_t     sat_family;
  29         __u8            sat_port;
  30         struct at_addr  sat_addr;
  31         char            sat_zero[ 8 ];
  32 };
  33
  34 struct netrange
  35 {
  36         __u8    nr_phase;
  37         __u16   nr_firstnet;
  38         __u16   nr_lastnet;
  39 };
  40
  41 struct atalk_route
  42 {
  43         struct device *dev;
  44         struct at_addr target;
  45         struct at_addr gateway;
  46         int flags;
  47         struct atalk_route *next;
  48 };
  49
  50 struct atalk_iface
  51 {
  52         struct device *dev;
  53         struct at_addr address;         /* Our address */
  54         int status;                     /* What are we doing ?? */
  55 #define ATIF_PROBE      1               /* Probing for an address */
  56 #define ATIF_PROBE_FAIL 2               /* Probe collided */
  57         struct netrange nets;           /* Associated direct netrange */
  58         struct atalk_iface *next;
  59 };
  60
  61 struct atalk_sock
  62 {
  63         unsigned short dest_net;
  64         unsigned short src_net;
  65         unsigned char dest_node;
  66         unsigned char src_node;
  67         unsigned char dest_port;
  68         unsigned char src_port;
  69 };
  70
  71 #define DDP_MAXHOPS     15      /* 4 bits of hop counter */
  72
  73 #ifdef __KERNEL__
  74
  75 #include <asm/byteorder.h>
  76
  77 struct ddpehdr
  78 {
  79 #ifdef __LITTLE_ENDIAN_BITFIELD
  80         __u16   deh_len:10, deh_hops:4, deh_pad:2;
  81 #else
  82         __u16   deh_pad:2, deh_hops:4, deh_len:10;
  83 #endif
  84         __u16   deh_sum;
  85         __u16   deh_dnet;
  86         __u16   deh_snet;
  87         __u8    deh_dnode;
  88         __u8    deh_snode;
  89         __u8    deh_dport;
  90         __u8    deh_sport;
  91         /* And netatalk apps expect to stick the type in themselves */
  92 };
  93
  94 /*
  95  *      Short form header
  96  */
  97
  98 struct ddpshdr
  99 {
 100 #ifdef __LITTLE_ENDIAN_BITFIELD
 101         __u16   dsh_len:10, dsh_pad:6;
 102 #else
 103         __u16   dsh_pad:6, dsh_len:10;
 104 #endif
 105         __u8    dsh_dport;
 106         __u8    dsh_sport;
 107         /* And netatalk apps expect to stick the type in themselves */
 108 };
 109
 110 /* Appletalk AARP headers */
 111
 112 struct elapaarp
 113 {
 114         __u16   hw_type;
 115 #define AARP_HW_TYPE_ETHERNET           1
 116 #define AARP_HW_TYPE_TOKENRING          2
 117         __u16   pa_type;
 118         __u8    hw_len;
 119         __u8    pa_len;
 120 #define AARP_PA_ALEN                    4
 121         __u16   function;
 122 #define AARP_REQUEST                    1
 123 #define AARP_REPLY                      2
 124 #define AARP_PROBE                      3
 125         __u8    hw_src[ETH_ALEN]        __attribute__ ((packed));
 126         __u8    pa_src_zero             __attribute__ ((packed));
 127         __u16   pa_src_net              __attribute__ ((packed));
 128         __u8    pa_src_node             __attribute__ ((packed));
 129         __u8    hw_dst[ETH_ALEN]        __attribute__ ((packed));
 130         __u8    pa_dst_zero             __attribute__ ((packed));
 131         __u16   pa_dst_net              __attribute__ ((packed));
 132         __u8    pa_dst_node             __attribute__ ((packed));
 133 };
 134
 135 #define AARP_EXPIRY_TIME        (5*60*HZ)       /* Not specified - how long till we drop a resolved entry */
 136 #define AARP_HASH_SIZE          16              /* Size of hash table */
 137 #define AARP_TICK_TIME          (HZ/5)          /* Fast retransmission timer when resolving */
 138 #define AARP_RETRANSMIT_LIMIT   10              /* Send 10 requests then give up (2 seconds) */
 139 #define AARP_RESOLVE_TIME       (10*HZ)         /* Some value bigger than total retransmit time + a bit for last reply to appear and to stop continual requests */
 140
 141 extern struct datalink_proto *ddp_dl, *aarp_dl;
 142 extern void aarp_proto_init(void);
 143 /* Inter module exports */
 144
 145 /*
 146  *      Give a device find its atif control structure
 147  */
 148
 149 extern __inline__ struct atalk_iface *atalk_find_dev(struct device *dev)
 150 {
 151         return dev->atalk_ptr;
 152 }
 153
 154 extern struct at_addr *atalk_find_dev_addr(struct device *dev);
 155 extern int aarp_send_ddp(struct device *dev,struct sk_buff *skb, struct at_addr *sa, void *hwaddr);
 156 extern void aarp_send_probe(struct device *dev, struct at_addr *addr);
 157 #ifdef MODULE
 158 extern void aarp_cleanup_module(void);
 159 #endif
 160
 161 #endif
 162 #endif