include/linux/atalk.h

   1 #ifndef __LINUX_ATALK_H__
   2 #define __LINUX_ATALK_H__
   3
   4 #include <asm/byteorder.h>
   5
   6 /*
   7  * AppleTalk networking structures
   8  *
   9  * The following are directly referenced from the University Of Michigan
  10  * netatalk for compatibility reasons.
  11  */
  12 #define ATPORT_FIRST    1
  13 #define ATPORT_RESERVED 128
  14 #define ATPORT_LAST     254             /* 254 is only legal on localtalk */
  15 #define ATADDR_ANYNET   (__u16)0
  16 #define ATADDR_ANYNODE  (__u8)0
  17 #define ATADDR_ANYPORT  (__u8)0
  18 #define ATADDR_BCAST    (__u8)255
  19 #define DDP_MAXSZ       587
  20 #define DDP_MAXHOPS     15              /* 4 bits of hop counter */
  21
  22 #define SIOCATALKDIFADDR       (SIOCPROTOPRIVATE + 0)
  23
  24 struct atalk_addr {
  25         __be16  s_net;
  26         __u8    s_node;
  27 };
  28
  29 struct sockaddr_at {
  30         sa_family_t       sat_family;
  31         __u8              sat_port;
  32         struct atalk_addr sat_addr;
  33         char              sat_zero[8];
  34 };
  35
  36 struct atalk_netrange {
  37         __u8    nr_phase;
  38         __be16  nr_firstnet;
  39         __be16  nr_lastnet;
  40 };
  41
  42 #ifdef __KERNEL__
  43
  44 #include <net/sock.h>
  45
  46 struct atalk_route {
  47         struct net_device  *dev;
  48         struct atalk_addr  target;
  49         struct atalk_addr  gateway;
  50         int                flags;
  51         struct atalk_route *next;
  52 };
  53
  54 /**
  55  *      struct atalk_iface - AppleTalk Interface
  56  *      @dev - Network device associated with this interface
  57  *      @address - Our address
  58  *      @status - What are we doing?
  59  *      @nets - Associated direct netrange
  60  *      @next - next element in the list of interfaces
  61  */
  62 struct atalk_iface {
  63         struct net_device       *dev;
  64         struct atalk_addr       address;
  65         int                     status;
  66 #define ATIF_PROBE      1               /* Probing for an address */
  67 #define ATIF_PROBE_FAIL 2               /* Probe collided */
  68         struct atalk_netrange   nets;
  69         struct atalk_iface      *next;
  70 };
  71
  72 struct atalk_sock {
  73         /* struct sock has to be the first member of atalk_sock */
  74         struct sock     sk;
  75         __be16          dest_net;
  76         __be16          src_net;
  77         unsigned char   dest_node;
  78         unsigned char   src_node;
  79         unsigned char   dest_port;
  80         unsigned char   src_port;
  81 };
  82
  83 static inline struct atalk_sock *at_sk(struct sock *sk)
  84 {
  85         return (struct atalk_sock *)sk;
  86 }
  87
  88 #include <asm/byteorder.h>
  89
  90 struct ddpehdr {
  91 #ifdef __LITTLE_ENDIAN_BITFIELD
  92         __u16   deh_len:10,
  93                 deh_hops:4,
  94                 deh_pad:2;
  95 #else
  96         __u16   deh_pad:2,
  97                 deh_hops:4,
  98                 deh_len:10;
  99 #endif
 100         __be16  deh_sum;
 101         __be16  deh_dnet;
 102         __be16  deh_snet;
 103         __u8    deh_dnode;
 104         __u8    deh_snode;
 105         __u8    deh_dport;
 106         __u8    deh_sport;
 107         /* And netatalk apps expect to stick the type in themselves */
 108 };
 109
 110 static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
 111 {
 112         return (struct ddpehdr *)skb->h.raw;
 113 }
 114
 115 /*
 116  *      Don't drop the struct into the struct above.  You'll get some
 117  *      surprise padding.
 118  */
 119 struct ddpebits {
 120 #ifdef __LITTLE_ENDIAN_BITFIELD
 121         __u16   deh_len:10,
 122                 deh_hops:4,
 123                 deh_pad:2;
 124 #else
 125         __u16   deh_pad:2,
 126                 deh_hops:4,
 127                 deh_len:10;
 128 #endif
 129 };
 130
 131 /* Short form header */
 132 struct ddpshdr {
 133 #ifdef __LITTLE_ENDIAN_BITFIELD
 134         __u16   dsh_len:10,
 135                 dsh_pad:6;
 136 #else
 137         __u16   dsh_pad:6,
 138                 dsh_len:10;
 139 #endif
 140         __u8    dsh_dport;
 141         __u8    dsh_sport;
 142         /* And netatalk apps expect to stick the type in themselves */
 143 };
 144
 145 /* AppleTalk AARP headers */
 146 struct elapaarp {
 147         __be16  hw_type;
 148 #define AARP_HW_TYPE_ETHERNET           1
 149 #define AARP_HW_TYPE_TOKENRING          2
 150         __be16  pa_type;
 151         __u8    hw_len;
 152         __u8    pa_len;
 153 #define AARP_PA_ALEN                    4
 154         __be16  function;
 155 #define AARP_REQUEST                    1
 156 #define AARP_REPLY                      2
 157 #define AARP_PROBE                      3
 158         __u8    hw_src[ETH_ALEN];
 159         __u8    pa_src_zero;
 160         __be16  pa_src_net;
 161         __u8    pa_src_node;
 162         __u8    hw_dst[ETH_ALEN];
 163         __u8    pa_dst_zero;
 164         __be16  pa_dst_net;
 165         __u8    pa_dst_node;
 166 } __attribute__ ((packed));
 167
 168 static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
 169 {
 170         return (struct elapaarp *)skb->h.raw;
 171 }
 172
 173 /* Not specified - how long till we drop a resolved entry */
 174 #define AARP_EXPIRY_TIME        (5 * 60 * HZ)
 175 /* Size of hash table */
 176 #define AARP_HASH_SIZE          16
 177 /* Fast retransmission timer when resolving */
 178 #define AARP_TICK_TIME          (HZ / 5)
 179 /* Send 10 requests then give up (2 seconds) */
 180 #define AARP_RETRANSMIT_LIMIT   10
 181 /*
 182  * Some value bigger than total retransmit time + a bit for last reply to
 183  * appear and to stop continual requests
 184  */
 185 #define AARP_RESOLVE_TIME       (10 * HZ)
 186
 187 extern struct datalink_proto *ddp_dl, *aarp_dl;
 188 extern void aarp_proto_init(void);
 189
 190 /* Inter module exports */
 191
 192 /* Give a device find its atif control structure */
 193 static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
 194 {
 195         return dev->atalk_ptr;
 196 }
 197
 198 extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
 199 extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
 200 extern int               aarp_send_ddp(struct net_device *dev,
 201                                        struct sk_buff *skb,
 202                                        struct atalk_addr *sa, void *hwaddr);
 203 extern void              aarp_device_down(struct net_device *dev);
 204 extern void              aarp_probe_network(struct atalk_iface *atif);
 205 extern int               aarp_proxy_probe_network(struct atalk_iface *atif,
 206                                      struct atalk_addr *sa);
 207 extern void              aarp_proxy_remove(struct net_device *dev,
 208                                            struct atalk_addr *sa);
 209
 210 extern void             aarp_cleanup_module(void);
 211
 212 extern struct hlist_head atalk_sockets;
 213 extern rwlock_t atalk_sockets_lock;
 214
 215 extern struct atalk_route *atalk_routes;
 216 extern rwlock_t atalk_routes_lock;
 217
 218 extern struct atalk_iface *atalk_interfaces;
 219 extern rwlock_t atalk_interfaces_lock;
 220
 221 extern struct atalk_route atrtr_default;
 222
 223 extern struct file_operations atalk_seq_arp_fops;
 224
 225 extern int sysctl_aarp_expiry_time;
 226 extern int sysctl_aarp_tick_time;
 227 extern int sysctl_aarp_retransmit_limit;
 228 extern int sysctl_aarp_resolve_time;
 229
 230 #ifdef CONFIG_SYSCTL
 231 extern void atalk_register_sysctl(void);
 232 extern void atalk_unregister_sysctl(void);
 233 #else
 234 #define atalk_register_sysctl()         do { } while(0)
 235 #define atalk_unregister_sysctl()       do { } while(0)
 236 #endif
 237
 238 #ifdef CONFIG_PROC_FS
 239 extern int atalk_proc_init(void);
 240 extern void atalk_proc_exit(void);
 241 #else
 242 #define atalk_proc_init()       ({ 0; })
 243 #define atalk_proc_exit()       do { } while(0)
 244 #endif /* CONFIG_PROC_FS */
 245
 246 #endif /* __KERNEL__ */
 247 #endif /* __LINUX_ATALK_H__ */