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     254 /* 254 is only legal on localtalk */
  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 #define DDP_MAXHOPS     15      /* 4 bits of hop counter */
  20
  21 #define SIOCATALKDIFADDR       (SIOCPROTOPRIVATE + 0)
  22
  23 struct at_addr
  24 {
  25         __u16   s_net;
  26         __u8    s_node;
  27 };
  28
  29 struct sockaddr_at
  30 {
  31         sa_family_t     sat_family;
  32         __u8            sat_port;
  33         struct at_addr  sat_addr;
  34         char            sat_zero[ 8 ];
  35 };
  36
  37 struct netrange
  38 {
  39         __u8    nr_phase;
  40         __u16   nr_firstnet;
  41         __u16   nr_lastnet;
  42 };
  43
  44 struct atalk_route
  45 {
  46         struct device *dev;
  47         struct at_addr target;
  48         struct at_addr gateway;
  49         int flags;
  50         struct atalk_route *next;
  51 };
  52
  53 struct atalk_iface
  54 {
  55         struct device *dev;
  56         struct at_addr address;         /* Our address */
  57         int status;                     /* What are we doing? */
  58 #define ATIF_PROBE      1               /* Probing for an address */
  59 #define ATIF_PROBE_FAIL 2               /* Probe collided */
  60         struct netrange nets;           /* Associated direct netrange */
  61         struct atalk_iface *next;
  62 };
  63
  64 struct atalk_sock
  65 {
  66         unsigned short dest_net;
  67         unsigned short src_net;
  68         unsigned char dest_node;
  69         unsigned char src_node;
  70         unsigned char dest_port;
  71         unsigned char src_port;
  72 };
  73
  74 #ifdef __KERNEL__
  75
  76 #include <asm/byteorder.h>
  77
  78 struct ddpehdr
  79 {
  80 #ifdef __LITTLE_ENDIAN_BITFIELD
  81         __u16   deh_len:10, deh_hops:4, deh_pad:2;
  82 #else
  83         __u16   deh_pad:2, deh_hops:4, deh_len:10;
  84 #endif
  85         __u16   deh_sum;
  86         __u16   deh_dnet;
  87         __u16   deh_snet;
  88         __u8    deh_dnode;
  89         __u8    deh_snode;
  90         __u8    deh_dport;
  91         __u8    deh_sport;
  92         /* And netatalk apps expect to stick the type in themselves */
  93 };
  94
  95 /*
  96  *      Don't drop the struct into the struct above.  You'll get some
  97  *      surprise padding.
  98  */
  99
 100 struct ddpebits
 101 {
 102 #ifdef __LITTLE_ENDIAN_BITFIELD
 103         __u16   deh_len:10, deh_hops:4, deh_pad:2;
 104 #else
 105         __u16   deh_pad:2, deh_hops:4, deh_len:10;
 106 #endif
 107 };
 108
 109 /*
 110  *      Short form header
 111  */
 112
 113 struct ddpshdr
 114 {
 115 #ifdef __LITTLE_ENDIAN_BITFIELD
 116         __u16   dsh_len:10, dsh_pad:6;
 117 #else
 118         __u16   dsh_pad:6, dsh_len:10;
 119 #endif
 120         __u8    dsh_dport;
 121         __u8    dsh_sport;
 122         /* And netatalk apps expect to stick the type in themselves */
 123 };
 124
 125 /* AppleTalk AARP headers */
 126
 127 struct elapaarp
 128 {
 129         __u16   hw_type;
 130 #define AARP_HW_TYPE_ETHERNET           1
 131 #define AARP_HW_TYPE_TOKENRING          2
 132         __u16   pa_type;
 133         __u8    hw_len;
 134         __u8    pa_len;
 135 #define AARP_PA_ALEN                    4
 136         __u16   function;
 137 #define AARP_REQUEST                    1
 138 #define AARP_REPLY                      2
 139 #define AARP_PROBE                      3
 140         __u8    hw_src[ETH_ALEN]        __attribute__ ((packed));
 141         __u8    pa_src_zero             __attribute__ ((packed));
 142         __u16   pa_src_net              __attribute__ ((packed));
 143         __u8    pa_src_node             __attribute__ ((packed));
 144         __u8    hw_dst[ETH_ALEN]        __attribute__ ((packed));
 145         __u8    pa_dst_zero             __attribute__ ((packed));
 146         __u16   pa_dst_net              __attribute__ ((packed));
 147         __u8    pa_dst_node             __attribute__ ((packed));
 148 };
 149
 150 #define AARP_EXPIRY_TIME        (5*60*HZ)       /* Not specified - how long till we drop a resolved entry */
 151 #define AARP_HASH_SIZE          16              /* Size of hash table */
 152 #define AARP_TICK_TIME          (HZ/5)          /* Fast retransmission timer when resolving */
 153 #define AARP_RETRANSMIT_LIMIT   10              /* Send 10 requests then give up (2 seconds) */
 154 #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 */
 155
 156 extern struct datalink_proto *ddp_dl, *aarp_dl;
 157 extern void aarp_proto_init(void);
 158 /* Inter module exports */
 159
 160 /*
 161  *      Give a device find its atif control structure
 162  */
 163
 164 extern __inline__ struct atalk_iface *atalk_find_dev(struct device *dev)
 165 {
 166         return dev->atalk_ptr;
 167 }
 168
 169 extern struct at_addr *atalk_find_dev_addr(struct device *dev);
 170 extern struct device *atrtr_get_dev(struct at_addr *sa);
 171 extern int aarp_send_ddp(struct device *dev,struct sk_buff *skb, struct at_addr *sa, void *hwaddr);
 172 extern void aarp_send_probe(struct device *dev, struct at_addr *addr);
 173 extern void aarp_device_down(struct device *dev);
 174
 175 #ifdef MODULE
 176 extern void aarp_cleanup_module(void);
 177 #endif /* MODULE */
 178
 179 #endif /* __KERNEL__ */
 180 #endif /* __LINUX_ATALK_H__ */