include/linux/atalk.h

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