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