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/*

 *      Appletalk networking structures

 *

 *      The following are directly referenced from the University Of Michigan

 *      netatalk for compatibility reasons.

 */

#ifndef __LINUX_ATALK_H__

#define __LINUX_ATALK_H__

#define SIOCATALKDIFADDR      (SIOCPROTOPRIVATE + 0)

#define ATPORT_FIRST    1

#define ATPORT_RESERVED 128

#define ATPORT_LAST     255

#define ATADDR_ANYNET   (__u16)0

#define ATADDR_ANYNODE  (__u8)0

#define ATADDR_ANYPORT  (__u8)0

#define ATADDR_BCAST    (__u8)255

#define DDP_MAXSZ       587

struct at_addr

{

        __u16   s_net;

        __u8    s_node;

};

struct sockaddr_at

{

        short           sat_family;

        __u8            sat_port;

        struct at_addr  sat_addr;

        char            sat_zero[ 8 ];

};

struct netrange

{

        __u8    nr_phase;

        __u16   nr_firstnet;

        __u16   nr_lastnet;

};

struct atalk_route

{

        struct device *dev;

        struct at_addr target;

        struct at_addr gateway;

        int flags;

        struct atalk_route *next;

};

struct atalk_iface

{

        struct device *dev;

        struct at_addr address;         /* Our address */

        int status;                     /* What are we doing ?? */

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

#define ATIF_PROBE_FAIL 2               /* Probe collided */

        struct netrange nets;           /* Associated direct netrange */

        struct atalk_iface *next;

};

struct atalk_sock

{

        unsigned short dest_net;

        unsigned short src_net;

        unsigned char dest_node;

        unsigned char src_node;

        unsigned char dest_port;

        unsigned char src_port;

};

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

#ifdef __KERNEL__

#include <asm/byteorder.h>

struct ddpehdr

{

#ifdef __LITTLE_ENDIAN_BITFIELD

        __u16   deh_len:10, deh_hops:4, deh_pad:2;

#else

        __u16   deh_pad:2, deh_hops:4, deh_len:10;

#endif

        __u16   deh_sum;

        __u16   deh_dnet;

        __u16   deh_snet;

        __u8    deh_dnode;

        __u8    deh_snode;

        __u8    deh_dport;

        __u8    deh_sport;

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

};

/*

 *      Unused (and currently unsupported)

 */

struct ddpshdr

{

#ifdef __LITTLE_ENDIAN_BITFIELD

        __u16   dsh_len:10, dsh_pad:6;

#else

        __u16   dsh_pad:6, dsh_len:10;

#endif

        __u8    dsh_dport;

        __u8    dsh_sport;

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

};

/* Appletalk AARP headers */

struct elapaarp

{

        __u16   hw_type;

#define AARP_HW_TYPE_ETHERNET           1

#define AARP_HW_TYPE_TOKENRING          2

        __u16   pa_type;

        __u8    hw_len;

        __u8    pa_len;

#define AARP_PA_ALEN                    4

        __u16   function;

#define AARP_REQUEST                    1

#define AARP_REPLY                      2

#define AARP_PROBE                      3

        __u8    hw_src[ETH_ALEN]        __attribute__ ((packed));

        __u8    pa_src_zero             __attribute__ ((packed));

        __u16   pa_src_net              __attribute__ ((packed));

        __u8    pa_src_node             __attribute__ ((packed));

        __u8    hw_dst[ETH_ALEN]        __attribute__ ((packed));

        __u8    pa_dst_zero             __attribute__ ((packed));

        __u16   pa_dst_net              __attribute__ ((packed));

        __u8    pa_dst_node             __attribute__ ((packed));

};

typedef struct sock     atalk_socket;

#define AARP_EXPIRY_TIME        (5*60*HZ)       /* Not specified - how long till we drop a resolved entry */

#define AARP_HASH_SIZE          16              /* Size of hash table */

#define AARP_TICK_TIME          (HZ/5)          /* Fast retransmission timer when resolving */

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

#define AARP_RESOLVE_TIME       (10*HZ)         /* Some value bigger than total retransmit time + a bit for last reply to appear and to stop continual requests */

extern struct datalink_proto *ddp_dl, *aarp_dl;

extern void aarp_proto_init(void);

/* Inter module exports */

extern struct atalk_iface *atalk_find_dev(struct device *dev);

extern struct at_addr *atalk_find_dev_addr(struct device *dev);

extern int aarp_send_ddp(struct device *dev,struct sk_buff *skb, struct at_addr *sa, void *hwaddr);

extern void aarp_send_probe(struct device *dev, struct at_addr *addr);

#ifdef MODULE

extern void aarp_cleanup_module(void);

#endif

#endif

#endif