include/linux/atalk.h

   1 #ifndef __LINUX_ATALK_H__
   2 #define __LINUX_ATALK_H__
   3 /*
   4  * AppleTalk networking structures
   5  *
   6  * The following are directly referenced from the University Of Michigan
   7  * netatalk for compatibility reasons.
   8  */
   9 #define ATPORT_FIRST    1
  10 #define ATPORT_RESERVED 128
  11 #define ATPORT_LAST     254             /* 254 is only legal on localtalk */
  12 #define ATADDR_ANYNET   (__u16)0
  13 #define ATADDR_ANYNODE  (__u8)0
  14 #define ATADDR_ANYPORT  (__u8)0
  15 #define ATADDR_BCAST    (__u8)255
  16 #define DDP_MAXSZ       587
  17 #define DDP_MAXHOPS     15              /* 4 bits of hop counter */
  18
  19 #define SIOCATALKDIFADDR       (SIOCPROTOPRIVATE + 0)
  20
  21 struct atalk_addr {
  22         __u16   s_net;
  23         __u8    s_node;
  24 };
  25
  26 struct sockaddr_at {
  27         sa_family_t       sat_family;
  28         __u8              sat_port;
  29         struct atalk_addr sat_addr;
  30         char              sat_zero[8];
  31 };
  32
  33 struct atalk_netrange {
  34         __u8    nr_phase;
  35         __u16   nr_firstnet;
  36         __u16   nr_lastnet;
  37 };
  38
  39 struct atalk_route {
  40         struct net_device  *dev;
  41         struct atalk_addr  target;
  42         struct atalk_addr  gateway;
  43         int                flags;
  44         struct atalk_route *next;
  45 };
  46
  47 /**
  48  *      struct atalk_iface - AppleTalk Interface
  49  *      @dev - Network device associated with this interface
  50  *      @address - Our address
  51  *      @status - What are we doing?
  52  *      @nets - Associated direct netrange
  53  *      @next - next element in the list of interfaces
  54  */
  55 struct atalk_iface {
  56         struct net_device       *dev;
  57         struct atalk_addr       address;
  58         int                     status;
  59 #define ATIF_PROBE      1               /* Probing for an address */
  60 #define ATIF_PROBE_FAIL 2               /* Probe collided */
  61         struct atalk_netrange   nets;
  62         struct atalk_iface      *next;
  63 };
  64
  65 struct atalk_sock {
  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 #ifdef __LITTLE_ENDIAN_BITFIELD
  80         __u16   deh_len:10,
  81                 deh_hops:4,
  82                 deh_pad:2;
  83 #else
  84         __u16   deh_pad:2,
  85                 deh_hops:4,
  86                 deh_len:10;
  87 #endif
  88         __u16   deh_sum;
  89         __u16   deh_dnet;
  90         __u16   deh_snet;
  91         __u8    deh_dnode;
  92         __u8    deh_snode;
  93         __u8    deh_dport;
  94         __u8    deh_sport;
  95         /* And netatalk apps expect to stick the type in themselves */
  96 };
  97
  98 static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
  99 {
 100         return (struct ddpehdr *)skb->h.raw;
 101 }
 102
 103 /*
 104  *      Don't drop the struct into the struct above.  You'll get some
 105  *      surprise padding.
 106  */
 107 struct ddpebits {
 108 #ifdef __LITTLE_ENDIAN_BITFIELD
 109         __u16   deh_len:10,
 110                 deh_hops:4,
 111                 deh_pad:2;
 112 #else
 113         __u16   deh_pad:2,
 114                 deh_hops:4,
 115                 deh_len:10;
 116 #endif
 117 };
 118
 119 /* Short form header */
 120 struct ddpshdr {
 121 #ifdef __LITTLE_ENDIAN_BITFIELD
 122         __u16   dsh_len:10,
 123                 dsh_pad:6;
 124 #else
 125         __u16   dsh_pad:6,
 126                 dsh_len:10;
 127 #endif
 128         __u8    dsh_dport;
 129         __u8    dsh_sport;
 130         /* And netatalk apps expect to stick the type in themselves */
 131 };
 132
 133 /* AppleTalk AARP headers */
 134 struct elapaarp {
 135         __u16   hw_type;
 136 #define AARP_HW_TYPE_ETHERNET           1
 137 #define AARP_HW_TYPE_TOKENRING          2
 138         __u16   pa_type;
 139         __u8    hw_len;
 140         __u8    pa_len;
 141 #define AARP_PA_ALEN                    4
 142         __u16   function;
 143 #define AARP_REQUEST                    1
 144 #define AARP_REPLY                      2
 145 #define AARP_PROBE                      3
 146         __u8    hw_src[ETH_ALEN]        __attribute__ ((packed));
 147         __u8    pa_src_zero             __attribute__ ((packed));
 148         __u16   pa_src_net              __attribute__ ((packed));
 149         __u8    pa_src_node             __attribute__ ((packed));
 150         __u8    hw_dst[ETH_ALEN]        __attribute__ ((packed));
 151         __u8    pa_dst_zero             __attribute__ ((packed));
 152         __u16   pa_dst_net              __attribute__ ((packed));
 153         __u8    pa_dst_node             __attribute__ ((packed));
 154 };
 155
 156 static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
 157 {
 158         return (struct elapaarp *)skb->h.raw;
 159 }
 160
 161 /* Not specified - how long till we drop a resolved entry */
 162 #define AARP_EXPIRY_TIME        (5 * 60 * HZ)
 163 /* Size of hash table */
 164 #define AARP_HASH_SIZE          16
 165 /* Fast retransmission timer when resolving */
 166 #define AARP_TICK_TIME          (HZ / 5)
 167 /* Send 10 requests then give up (2 seconds) */
 168 #define AARP_RETRANSMIT_LIMIT   10
 169 /*
 170  * Some value bigger than total retransmit time + a bit for last reply to
 171  * appear and to stop continual requests
 172  */
 173 #define AARP_RESOLVE_TIME       (10 * HZ)
 174
 175 extern struct datalink_proto *ddp_dl, *aarp_dl;
 176 extern void aarp_proto_init(void);
 177
 178 /* Inter module exports */
 179
 180 /* Give a device find its atif control structure */
 181 static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
 182 {
 183         return dev->atalk_ptr;
 184 }
 185
 186 extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
 187 extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
 188 extern int               aarp_send_ddp(struct net_device *dev,
 189                                        struct sk_buff *skb,
 190                                        struct atalk_addr *sa, void *hwaddr);
 191 extern void              aarp_send_probe(struct net_device *dev,
 192                                          struct atalk_addr *addr);
 193 extern void              aarp_device_down(struct net_device *dev);
 194
 195 #ifdef MODULE
 196 extern void aarp_cleanup_module(void);
 197 #endif /* MODULE */
 198
 199 #define at_sk(__sk) ((struct atalk_sock *)(__sk)->sk_protinfo)
 200
 201 extern struct hlist_head atalk_sockets;
 202 extern rwlock_t atalk_sockets_lock;
 203
 204 extern struct atalk_route *atalk_routes;
 205 extern rwlock_t atalk_routes_lock;
 206
 207 extern struct atalk_iface *atalk_interfaces;
 208 extern rwlock_t atalk_interfaces_lock;
 209
 210 extern struct atalk_route atrtr_default;
 211
 212 extern int atalk_proc_init(void);
 213 extern void atalk_proc_exit(void);
 214
 215 #endif /* __KERNEL__ */
 216 #endif /* __LINUX_ATALK_H__ */