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/*

 *      Declarations of NET/ROM type objects.

 *

 *      Jonathan Naylor G4KLX   9/4/95

 */

#ifndef _NETROM_H

#define _NETROM_H 

#include <linux/netrom.h>

#define NR_SLOWHZ                       10      /* Run timing at 1/10 second */

#define NR_NETWORK_LEN                  15

#define NR_TRANSPORT_LEN                5

#define NR_PROTO_IP                     0x0C

#define NR_PROTOEXT                     0x00

#define NR_CONNREQ                      0x01

#define NR_CONNACK                      0x02

#define NR_DISCREQ                      0x03

#define NR_DISCACK                      0x04

#define NR_INFO                         0x05

#define NR_INFOACK                      0x06

#define NR_CHOKE_FLAG                   0x80

#define NR_NAK_FLAG                     0x40

#define NR_MORE_FLAG                    0x20

/* Define Link State constants. */

#define NR_STATE_0                      0

#define NR_STATE_1                      1

#define NR_STATE_2                      2

#define NR_STATE_3                      3

#define NR_COND_ACK_PENDING             0x01

#define NR_COND_REJECT                  0x02

#define NR_COND_PEER_RX_BUSY            0x04

#define NR_COND_OWN_RX_BUSY             0x08

#define NR_DEFAULT_T1                   (120 * NR_SLOWHZ)       /* Outstanding frames - 120 seconds */

#define NR_DEFAULT_T2                   (5   * NR_SLOWHZ)       /* Response delay     - 5 seconds */

#define NR_DEFAULT_N2                   3                       /* Number of Retries - 3 */

#define NR_DEFAULT_T4                   (180 * NR_SLOWHZ)       /* Busy Delay - 180 seconds */

#define NR_DEFAULT_WINDOW               4                       /* Default Window Size - 4 */

#define NR_DEFAULT_OBS                  6                       /* Default Obsolescence Count - 6 */

#define NR_DEFAULT_QUAL                 10                      /* Default Neighbour Quality - 10 */

#define NR_DEFAULT_TTL                  16                      /* Default Time To Live - 16 */

#define NR_DEFAULT_ROUTING              1                       /* Is routing enabled ? */

#define NR_DEFAULT_FAILS                2                       /* Link fails until route fails */

#define NR_MODULUS                      256

#define NR_MAX_WINDOW_SIZE              127                     /* Maximum Window Allowable - 127 */

#define NR_MAX_PACKET_SIZE              236                     /* Maximum Packet Length - 236 */

typedef struct {

        ax25_address            user_addr, source_addr, dest_addr;

        struct device           *device;

        unsigned char           my_index,   my_id;

        unsigned char           your_index, your_id;

        unsigned char           state, condition, bpqext, window;

        unsigned short          vs, vr, va, vl;

        unsigned char           n2, n2count;

        unsigned short          t1, t2, t4;

        unsigned short          t1timer, t2timer, t4timer;

        unsigned short          fraglen;

        struct sk_buff_head     ack_queue;

        struct sk_buff_head     reseq_queue;

        struct sk_buff_head     frag_queue;

        struct sock             *sk;            /* Backlink to socket */

} nr_cb;

struct nr_neigh {

        struct nr_neigh *next;

        ax25_address    callsign;

        ax25_digi       *digipeat;

        ax25_cb         *ax25;

        struct device   *dev;

        unsigned char   quality;

        unsigned char   locked;

        unsigned short  count;

        unsigned int    number;

        unsigned char   failed;

};

struct nr_route {

        unsigned char   quality;

        unsigned char   obs_count;

        struct nr_neigh *neighbour;

};

struct nr_node {

        struct nr_node  *next;

        ax25_address    callsign;

        char            mnemonic[7];

        unsigned char   which;

        unsigned char   count;

        struct nr_route routes[3];

};

/* af_netrom.c */

extern int  sysctl_netrom_default_path_quality;

extern int  sysctl_netrom_obsolescence_count_initialiser;

extern int  sysctl_netrom_network_ttl_initialiser;

extern int  sysctl_netrom_transport_timeout;

extern int  sysctl_netrom_transport_maximum_tries;

extern int  sysctl_netrom_transport_acknowledge_delay;

extern int  sysctl_netrom_transport_busy_delay;

extern int  sysctl_netrom_transport_requested_window_size;

extern int  sysctl_netrom_routing_control;

extern int  sysctl_netrom_link_fails_count;

extern int  nr_rx_frame(struct sk_buff *, struct device *);

extern void nr_destroy_socket(struct sock *);

/* nr_dev.c */

extern int  nr_rx_ip(struct sk_buff *, struct device *);

extern int  nr_init(struct device *);

#include <net/nrcall.h>

/* nr_in.c */

extern int  nr_process_rx_frame(struct sock *, struct sk_buff *);

/* nr_out.c */

extern void nr_output(struct sock *, struct sk_buff *);

extern void nr_send_nak_frame(struct sock *);

extern void nr_kick(struct sock *);

extern void nr_transmit_buffer(struct sock *, struct sk_buff *);

extern void nr_establish_data_link(struct sock *);

extern void nr_enquiry_response(struct sock *);

extern void nr_check_iframes_acked(struct sock *, unsigned short);

/* nr_route.c */

extern void nr_rt_device_down(struct device *);

extern struct device *nr_dev_first(void);

extern struct device *nr_dev_get(ax25_address *);

extern int  nr_rt_ioctl(unsigned int, void *);

extern void nr_link_failed(ax25_cb *, int);

extern int  nr_route_frame(struct sk_buff *, ax25_cb *);

extern int  nr_nodes_get_info(char *, char **, off_t, int, int);

extern int  nr_neigh_get_info(char *, char **, off_t, int, int);

extern void nr_rt_free(void);

/* nr_subr.c */

extern void nr_clear_queues(struct sock *);

extern void nr_frames_acked(struct sock *, unsigned short);

extern void nr_requeue_frames(struct sock *);

extern int  nr_validate_nr(struct sock *, unsigned short);

extern int  nr_in_rx_window(struct sock *, unsigned short);

extern void nr_write_internal(struct sock *, int);

extern void nr_transmit_dm(struct sk_buff *, int);

/* nr_timer.c */

extern void nr_set_timer(struct sock *);

/* sysctl_net_netrom.c */

extern void nr_register_sysctl(void);

extern void nr_unregister_sysctl(void);

/* nr_loopback.c */

extern void nr_loopback_init(void);

extern void nr_loopback_clear(void);

extern int nr_loopback_queue(struct sk_buff *);

#endif