linux/include/linux/atalk.h
<<
>>
Prefs
   1#ifndef __LINUX_ATALK_H__
   2#define __LINUX_ATALK_H__
   3
   4#include <linux/types.h>
   5#include <asm/byteorder.h>
   6#include <linux/socket.h>
   7
   8/*
   9 * AppleTalk networking structures
  10 *
  11 * The following are directly referenced from the University Of Michigan
  12 * netatalk for compatibility reasons.
  13 */
  14#define ATPORT_FIRST    1
  15#define ATPORT_RESERVED 128
  16#define ATPORT_LAST     254             /* 254 is only legal on localtalk */ 
  17#define ATADDR_ANYNET   (__u16)0
  18#define ATADDR_ANYNODE  (__u8)0
  19#define ATADDR_ANYPORT  (__u8)0
  20#define ATADDR_BCAST    (__u8)255
  21#define DDP_MAXSZ       587
  22#define DDP_MAXHOPS     15              /* 4 bits of hop counter */
  23
  24#define SIOCATALKDIFADDR       (SIOCPROTOPRIVATE + 0)
  25
  26struct atalk_addr {
  27        __be16  s_net;
  28        __u8    s_node;
  29};
  30
  31struct sockaddr_at {
  32        __kernel_sa_family_t sat_family;
  33        __u8              sat_port;
  34        struct atalk_addr sat_addr;
  35        char              sat_zero[8];
  36};
  37
  38struct atalk_netrange {
  39        __u8    nr_phase;
  40        __be16  nr_firstnet;
  41        __be16  nr_lastnet;
  42};
  43
  44#ifdef __KERNEL__
  45
  46#include <net/sock.h>
  47
  48struct atalk_route {
  49        struct net_device  *dev;
  50        struct atalk_addr  target;
  51        struct atalk_addr  gateway;
  52        int                flags;
  53        struct atalk_route *next;
  54};
  55
  56/**
  57 *      struct atalk_iface - AppleTalk Interface
  58 *      @dev - Network device associated with this interface
  59 *      @address - Our address
  60 *      @status - What are we doing?
  61 *      @nets - Associated direct netrange
  62 *      @next - next element in the list of interfaces
  63 */
  64struct atalk_iface {
  65        struct net_device       *dev;
  66        struct atalk_addr       address;
  67        int                     status;
  68#define ATIF_PROBE      1               /* Probing for an address */
  69#define ATIF_PROBE_FAIL 2               /* Probe collided */
  70        struct atalk_netrange   nets;
  71        struct atalk_iface      *next;
  72};
  73        
  74struct atalk_sock {
  75        /* struct sock has to be the first member of atalk_sock */
  76        struct sock     sk;
  77        __be16          dest_net;
  78        __be16          src_net;
  79        unsigned char   dest_node;
  80        unsigned char   src_node;
  81        unsigned char   dest_port;
  82        unsigned char   src_port;
  83};
  84
  85static inline struct atalk_sock *at_sk(struct sock *sk)
  86{
  87        return (struct atalk_sock *)sk;
  88}
  89
  90struct ddpehdr {
  91        __be16  deh_len_hops;   /* lower 10 bits are length, next 4 - hops */
  92        __be16  deh_sum;
  93        __be16  deh_dnet;
  94        __be16  deh_snet;
  95        __u8    deh_dnode;
  96        __u8    deh_snode;
  97        __u8    deh_dport;
  98        __u8    deh_sport;
  99        /* And netatalk apps expect to stick the type in themselves */
 100};
 101
 102static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)
 103{
 104        return (struct ddpehdr *)skb_transport_header(skb);
 105}
 106
 107/* AppleTalk AARP headers */
 108struct elapaarp {
 109        __be16  hw_type;
 110#define AARP_HW_TYPE_ETHERNET           1
 111#define AARP_HW_TYPE_TOKENRING          2
 112        __be16  pa_type;
 113        __u8    hw_len;
 114        __u8    pa_len;
 115#define AARP_PA_ALEN                    4
 116        __be16  function;
 117#define AARP_REQUEST                    1
 118#define AARP_REPLY                      2
 119#define AARP_PROBE                      3
 120        __u8    hw_src[ETH_ALEN];
 121        __u8    pa_src_zero;
 122        __be16  pa_src_net;
 123        __u8    pa_src_node;
 124        __u8    hw_dst[ETH_ALEN];
 125        __u8    pa_dst_zero;
 126        __be16  pa_dst_net;
 127        __u8    pa_dst_node;
 128} __attribute__ ((packed));
 129
 130static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)
 131{
 132        return (struct elapaarp *)skb_transport_header(skb);
 133}
 134
 135/* Not specified - how long till we drop a resolved entry */
 136#define AARP_EXPIRY_TIME        (5 * 60 * HZ)
 137/* Size of hash table */
 138#define AARP_HASH_SIZE          16
 139/* Fast retransmission timer when resolving */
 140#define AARP_TICK_TIME          (HZ / 5)
 141/* Send 10 requests then give up (2 seconds) */
 142#define AARP_RETRANSMIT_LIMIT   10
 143/*
 144 * Some value bigger than total retransmit time + a bit for last reply to
 145 * appear and to stop continual requests
 146 */
 147#define AARP_RESOLVE_TIME       (10 * HZ)
 148
 149extern struct datalink_proto *ddp_dl, *aarp_dl;
 150extern void aarp_proto_init(void);
 151
 152/* Inter module exports */
 153
 154/* Give a device find its atif control structure */
 155static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)
 156{
 157        return dev->atalk_ptr;
 158}
 159
 160extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);
 161extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);
 162extern int               aarp_send_ddp(struct net_device *dev,
 163                                       struct sk_buff *skb,
 164                                       struct atalk_addr *sa, void *hwaddr);
 165extern void              aarp_device_down(struct net_device *dev);
 166extern void              aarp_probe_network(struct atalk_iface *atif);
 167extern int               aarp_proxy_probe_network(struct atalk_iface *atif,
 168                                     struct atalk_addr *sa);
 169extern void              aarp_proxy_remove(struct net_device *dev,
 170                                           struct atalk_addr *sa);
 171
 172extern void             aarp_cleanup_module(void);
 173
 174extern struct hlist_head atalk_sockets;
 175extern rwlock_t atalk_sockets_lock;
 176
 177extern struct atalk_route *atalk_routes;
 178extern rwlock_t atalk_routes_lock;
 179
 180extern struct atalk_iface *atalk_interfaces;
 181extern rwlock_t atalk_interfaces_lock;
 182
 183extern struct atalk_route atrtr_default;
 184
 185extern const struct file_operations atalk_seq_arp_fops;
 186
 187extern int sysctl_aarp_expiry_time;
 188extern int sysctl_aarp_tick_time;
 189extern int sysctl_aarp_retransmit_limit;
 190extern int sysctl_aarp_resolve_time;
 191
 192#ifdef CONFIG_SYSCTL
 193extern void atalk_register_sysctl(void);
 194extern void atalk_unregister_sysctl(void);
 195#else
 196#define atalk_register_sysctl()         do { } while(0)
 197#define atalk_unregister_sysctl()       do { } while(0)
 198#endif
 199
 200#ifdef CONFIG_PROC_FS
 201extern int atalk_proc_init(void);
 202extern void atalk_proc_exit(void);
 203#else
 204#define atalk_proc_init()       ({ 0; })
 205#define atalk_proc_exit()       do { } while(0)
 206#endif /* CONFIG_PROC_FS */
 207
 208#endif /* __KERNEL__ */
 209#endif /* __LINUX_ATALK_H__ */
 210
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.