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#ifndef __LINUX_ATALK_H__

#define __LINUX_ATALK_H__

#include <asm/byteorder.h>

/*

 * AppleTalk networking structures

 *

 * The following are directly referenced from the University Of Michigan

 * netatalk for compatibility reasons.

 */

#define ATPORT_FIRST    1

#define ATPORT_RESERVED 128

#define ATPORT_LAST     254             /* 254 is only legal on localtalk */ 

#define ATADDR_ANYNET   (__u16)0

#define ATADDR_ANYNODE  (__u8)0

#define ATADDR_ANYPORT  (__u8)0

#define ATADDR_BCAST    (__u8)255

#define DDP_MAXSZ       587

#define DDP_MAXHOPS     15              /* 4 bits of hop counter */

#define SIOCATALKDIFADDR       (SIOCPROTOPRIVATE + 0)

struct atalk_addr {

        __be16  s_net;

        __u8    s_node;

};

struct sockaddr_at {

        sa_family_t       sat_family;

        __u8              sat_port;

        struct atalk_addr sat_addr;

        char              sat_zero[8];

};

struct atalk_netrange {

        __u8    nr_phase;

        __be16  nr_firstnet;

        __be16  nr_lastnet;

};

#ifdef __KERNEL__

#include <net/sock.h>

struct atalk_route {

        struct net_device  *dev;

        struct atalk_addr  target;

        struct atalk_addr  gateway;

        int                flags;

        struct atalk_route *next;

};

/**

 *      struct atalk_iface - AppleTalk Interface

 *      @dev - Network device associated with this interface

 *      @address - Our address

 *      @status - What are we doing?

 *      @nets - Associated direct netrange

 *      @next - next element in the list of interfaces

 */

struct atalk_iface {

        struct net_device       *dev;

        struct atalk_addr       address;

        int                     status;

#define ATIF_PROBE      1               /* Probing for an address */

#define ATIF_PROBE_FAIL 2               /* Probe collided */

        struct atalk_netrange   nets;

        struct atalk_iface      *next;

};

struct atalk_sock {

        /* struct sock has to be the first member of atalk_sock */

        struct sock     sk;

        __be16          dest_net;

        __be16          src_net;

        unsigned char   dest_node;

        unsigned char   src_node;

        unsigned char   dest_port;

        unsigned char   src_port;

};

static inline struct atalk_sock *at_sk(struct sock *sk)

{

        return (struct atalk_sock *)sk;

}

#include <asm/byteorder.h>

struct ddpehdr {

        __be16  deh_len_hops;   /* lower 10 bits are length, next 4 - hops */

        __be16  deh_sum;

        __be16  deh_dnet;

        __be16  deh_snet;

        __u8    deh_dnode;

        __u8    deh_snode;

        __u8    deh_dport;

        __u8    deh_sport;

        /* And netatalk apps expect to stick the type in themselves */

};

static __inline__ struct ddpehdr *ddp_hdr(struct sk_buff *skb)

{

        return (struct ddpehdr *)skb_transport_header(skb);

}

/* AppleTalk AARP headers */

struct elapaarp {

        __be16  hw_type;

#define AARP_HW_TYPE_ETHERNET           1

#define AARP_HW_TYPE_TOKENRING          2

        __be16  pa_type;

        __u8    hw_len;

        __u8    pa_len;

#define AARP_PA_ALEN                    4

        __be16  function;

#define AARP_REQUEST                    1

#define AARP_REPLY                      2

#define AARP_PROBE                      3

        __u8    hw_src[ETH_ALEN];

        __u8    pa_src_zero;

        __be16  pa_src_net;

        __u8    pa_src_node;

        __u8    hw_dst[ETH_ALEN];

        __u8    pa_dst_zero;

        __be16  pa_dst_net;

        __u8    pa_dst_node;

} __attribute__ ((packed));

static __inline__ struct elapaarp *aarp_hdr(struct sk_buff *skb)

{

        return (struct elapaarp *)skb_transport_header(skb);

}

/* Not specified - how long till we drop a resolved entry */

#define AARP_EXPIRY_TIME        (5 * 60 * HZ)

/* Size of hash table */

#define AARP_HASH_SIZE          16

/* Fast retransmission timer when resolving */

#define AARP_TICK_TIME          (HZ / 5)

/* Send 10 requests then give up (2 seconds) */

#define AARP_RETRANSMIT_LIMIT   10

/*

 * Some value bigger than total retransmit time + a bit for last reply to

 * appear and to stop continual requests

 */

#define AARP_RESOLVE_TIME       (10 * HZ)

extern struct datalink_proto *ddp_dl, *aarp_dl;

extern void aarp_proto_init(void);

/* Inter module exports */

/* Give a device find its atif control structure */

static inline struct atalk_iface *atalk_find_dev(struct net_device *dev)

{

        return dev->atalk_ptr;

}

extern struct atalk_addr *atalk_find_dev_addr(struct net_device *dev);

extern struct net_device *atrtr_get_dev(struct atalk_addr *sa);

extern int               aarp_send_ddp(struct net_device *dev,

                                       struct sk_buff *skb,

                                       struct atalk_addr *sa, void *hwaddr);

extern void              aarp_device_down(struct net_device *dev);

extern void              aarp_probe_network(struct atalk_iface *atif);

extern int               aarp_proxy_probe_network(struct atalk_iface *atif,

                                     struct atalk_addr *sa);

extern void              aarp_proxy_remove(struct net_device *dev,

                                           struct atalk_addr *sa);

extern void             aarp_cleanup_module(void);

extern struct hlist_head atalk_sockets;

extern rwlock_t atalk_sockets_lock;

extern struct atalk_route *atalk_routes;

extern rwlock_t atalk_routes_lock;

extern struct atalk_iface *atalk_interfaces;

extern rwlock_t atalk_interfaces_lock;

extern struct atalk_route atrtr_default;

extern const struct file_operations atalk_seq_arp_fops;

extern int sysctl_aarp_expiry_time;

extern int sysctl_aarp_tick_time;

extern int sysctl_aarp_retransmit_limit;

extern int sysctl_aarp_resolve_time;

#ifdef CONFIG_SYSCTL

extern void atalk_register_sysctl(void);

extern void atalk_unregister_sysctl(void);

#else

#define atalk_register_sysctl()         do { } while(0)

#define atalk_unregister_sysctl()       do { } while(0)

#endif

#ifdef CONFIG_PROC_FS

extern int atalk_proc_init(void);

extern void atalk_proc_exit(void);

#else

#define atalk_proc_init()       ({ 0; })

#define atalk_proc_exit()       do { } while(0)

#endif /* CONFIG_PROC_FS */

#endif /* __KERNEL__ */

#endif /* __LINUX_ATALK_H__ */