include/net/netrom.h

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This source file includes following definitions.
nr_node_put
nr_neigh_put
nr_node_lock
nr_node_unlock
/*
 *      Declarations of NET/ROM type objects.
 *
 *      Jonathan Naylor G4KLX   9/4/95
 */

#ifndef _NETROM_H
#define _NETROM_H 

#include <linux/netrom.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <net/sock.h>

#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_RESET                        0x07

#define NR_CHOKE_FLAG                   0x80
#define NR_NAK_FLAG                     0x40
#define NR_MORE_FLAG                    0x20

/* Define Link State constants. */
enum {
        NR_STATE_0,
        NR_STATE_1,
        NR_STATE_2,
        NR_STATE_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                   120000          /* Outstanding frames - 120 seconds */
#define NR_DEFAULT_T2                   5000            /* Response delay     - 5 seconds */
#define NR_DEFAULT_N2                   3               /* Number of Retries - 3 */
#define NR_DEFAULT_T4                   180000          /* Busy Delay - 180 seconds */
#define NR_DEFAULT_IDLE                 0               /* No Activity Timeout - none */
#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_DEFAULT_RESET                0               /* Sent / accept reset cmds? */

#define NR_MODULUS                      256
#define NR_MAX_WINDOW_SIZE              127                     /* Maximum Window Allowable - 127 */
#define NR_MAX_PACKET_SIZE              236                     /* Maximum Packet Length - 236 */

struct nr_sock {
        struct sock             sock;
        ax25_address            user_addr, source_addr, dest_addr;
        struct net_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 long           t1, t2, t4, idle;
        unsigned short          fraglen;
        struct timer_list       t1timer;
        struct timer_list       t2timer;
        struct timer_list       t4timer;
        struct timer_list       idletimer;
        struct sk_buff_head     ack_queue;
        struct sk_buff_head     reseq_queue;
        struct sk_buff_head     frag_queue;
};

#define nr_sk(sk) ((struct nr_sock *)(sk))

struct nr_neigh {
        struct hlist_node       neigh_node;
        ax25_address            callsign;
        ax25_digi               *digipeat;
        ax25_cb                 *ax25;
        struct net_device       *dev;
        unsigned char           quality;
        unsigned char           locked;
        unsigned short          count;
        unsigned int            number;
        unsigned char           failed;
        atomic_t                refcount;
};

struct nr_route {
        unsigned char   quality;
        unsigned char   obs_count;
        struct nr_neigh *neighbour;
};

struct nr_node {
        struct hlist_node       node_node;
        ax25_address            callsign;
        char                    mnemonic[7];
        unsigned char           which;
        unsigned char           count;
        struct nr_route         routes[3];
        atomic_t                refcount;
        spinlock_t              node_lock;
};

/*********************************************************************
 *      nr_node & nr_neigh lists, refcounting and locking
 *********************************************************************/

#define nr_node_hold(__nr_node) \
        atomic_inc(&((__nr_node)->refcount))

static __inline__ void nr_node_put(struct nr_node *nr_node)
{
        if (atomic_dec_and_test(&nr_node->refcount)) {
                kfree(nr_node);
        }
}

#define nr_neigh_hold(__nr_neigh) \
        atomic_inc(&((__nr_neigh)->refcount))

static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
{
        if (atomic_dec_and_test(&nr_neigh->refcount)) {
                if (nr_neigh->ax25)
                        ax25_cb_put(nr_neigh->ax25);
                kfree(nr_neigh->digipeat);
                kfree(nr_neigh);
        }
}

/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
 */
static __inline__ void nr_node_lock(struct nr_node *nr_node)
{
        nr_node_hold(nr_node);
        spin_lock_bh(&nr_node->node_lock);
}

static __inline__ void nr_node_unlock(struct nr_node *nr_node)
{
        spin_unlock_bh(&nr_node->node_lock);
        nr_node_put(nr_node);
}

#define nr_neigh_for_each(__nr_neigh, list) \
        hlist_for_each_entry(__nr_neigh, list, neigh_node)

#define nr_neigh_for_each_safe(__nr_neigh, node2, list) \
        hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node)

#define nr_node_for_each(__nr_node, list) \
        hlist_for_each_entry(__nr_node, list, node_node)

#define nr_node_for_each_safe(__nr_node, node2, list) \
        hlist_for_each_entry_safe(__nr_node, node2, list, node_node)


/*********************************************************************/

/* 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_transport_no_activity_timeout;
extern int  sysctl_netrom_routing_control;
extern int  sysctl_netrom_link_fails_count;
extern int  sysctl_netrom_reset_circuit;

int nr_rx_frame(struct sk_buff *, struct net_device *);
void nr_destroy_socket(struct sock *);

/* nr_dev.c */
int nr_rx_ip(struct sk_buff *, struct net_device *);
void nr_setup(struct net_device *);

/* nr_in.c */
int nr_process_rx_frame(struct sock *, struct sk_buff *);

/* nr_loopback.c */
void nr_loopback_init(void);
void nr_loopback_clear(void);
int nr_loopback_queue(struct sk_buff *);

/* nr_out.c */
void nr_output(struct sock *, struct sk_buff *);
void nr_send_nak_frame(struct sock *);
void nr_kick(struct sock *);
void nr_transmit_buffer(struct sock *, struct sk_buff *);
void nr_establish_data_link(struct sock *);
void nr_enquiry_response(struct sock *);
void nr_check_iframes_acked(struct sock *, unsigned short);

/* nr_route.c */
void nr_rt_device_down(struct net_device *);
struct net_device *nr_dev_first(void);
struct net_device *nr_dev_get(ax25_address *);
int nr_rt_ioctl(unsigned int, void __user *);
void nr_link_failed(ax25_cb *, int);
int nr_route_frame(struct sk_buff *, ax25_cb *);
extern const struct file_operations nr_nodes_fops;
extern const struct file_operations nr_neigh_fops;
void nr_rt_free(void);

/* nr_subr.c */
void nr_clear_queues(struct sock *);
void nr_frames_acked(struct sock *, unsigned short);
void nr_requeue_frames(struct sock *);
int nr_validate_nr(struct sock *, unsigned short);
int nr_in_rx_window(struct sock *, unsigned short);
void nr_write_internal(struct sock *, int);

void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags);

/*
 * This routine is called when a Connect Acknowledge with the Choke Flag
 * set is needed to refuse a connection.
 */
#define nr_transmit_refusal(skb, mine)                                  \
do {                                                                    \
        __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
} while (0)

/*
 * This routine is called when we don't have a circuit matching an incoming
 * NET/ROM packet.  This is an G8PZT Xrouter extension.
 */
#define nr_transmit_reset(skb, mine)                                    \
do {                                                                    \
        __nr_transmit_reply((skb), (mine), NR_RESET);                   \
} while (0)

void nr_disconnect(struct sock *, int);

/* nr_timer.c */
void nr_init_timers(struct sock *sk);
void nr_start_heartbeat(struct sock *);
void nr_start_t1timer(struct sock *);
void nr_start_t2timer(struct sock *);
void nr_start_t4timer(struct sock *);
void nr_start_idletimer(struct sock *);
void nr_stop_heartbeat(struct sock *);
void nr_stop_t1timer(struct sock *);
void nr_stop_t2timer(struct sock *);
void nr_stop_t4timer(struct sock *);
void nr_stop_idletimer(struct sock *);
int nr_t1timer_running(struct sock *);

/* sysctl_net_netrom.c */
void nr_register_sysctl(void);
void nr_unregister_sysctl(void);

#endif
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root/include/net/netrom.h

INCLUDED FROM

DEFINITIONS
