include/net/netrom.h

   1 /*
   2  *      Declarations of NET/ROM type objects.
   3  *
   4  *      Jonathan Naylor G4KLX   9/4/95
   5  */
   6
   7 #ifndef _NETROM_H
   8 #define _NETROM_H
   9 #include <linux/netrom.h>
  10 #include <linux/list.h>
  11 #include <net/sock.h>
  12
  13 #define NR_NETWORK_LEN                  15
  14 #define NR_TRANSPORT_LEN                5
  15
  16 #define NR_PROTO_IP                     0x0C
  17
  18 #define NR_PROTOEXT                     0x00
  19 #define NR_CONNREQ                      0x01
  20 #define NR_CONNACK                      0x02
  21 #define NR_DISCREQ                      0x03
  22 #define NR_DISCACK                      0x04
  23 #define NR_INFO                         0x05
  24 #define NR_INFOACK                      0x06
  25
  26 #define NR_CHOKE_FLAG                   0x80
  27 #define NR_NAK_FLAG                     0x40
  28 #define NR_MORE_FLAG                    0x20
  29
  30 /* Define Link State constants. */
  31 enum {
  32         NR_STATE_0,
  33         NR_STATE_1,
  34         NR_STATE_2,
  35         NR_STATE_3
  36 };
  37
  38 #define NR_COND_ACK_PENDING             0x01
  39 #define NR_COND_REJECT                  0x02
  40 #define NR_COND_PEER_RX_BUSY            0x04
  41 #define NR_COND_OWN_RX_BUSY             0x08
  42
  43 #define NR_DEFAULT_T1                   (120 * HZ)      /* Outstanding frames - 120 seconds */
  44 #define NR_DEFAULT_T2                   (5   * HZ)      /* Response delay     - 5 seconds */
  45 #define NR_DEFAULT_N2                   3               /* Number of Retries - 3 */
  46 #define NR_DEFAULT_T4                   (180 * HZ)      /* Busy Delay - 180 seconds */
  47 #define NR_DEFAULT_IDLE                 (0 * 60 * HZ)   /* No Activity Timeout - none */
  48 #define NR_DEFAULT_WINDOW               4               /* Default Window Size - 4 */
  49 #define NR_DEFAULT_OBS                  6               /* Default Obsolescence Count - 6 */
  50 #define NR_DEFAULT_QUAL                 10              /* Default Neighbour Quality - 10 */
  51 #define NR_DEFAULT_TTL                  16              /* Default Time To Live - 16 */
  52 #define NR_DEFAULT_ROUTING              1               /* Is routing enabled ? */
  53 #define NR_DEFAULT_FAILS                2               /* Link fails until route fails */
  54
  55 #define NR_MODULUS                      256
  56 #define NR_MAX_WINDOW_SIZE              127                     /* Maximum Window Allowable - 127 */
  57 #define NR_MAX_PACKET_SIZE              236                     /* Maximum Packet Length - 236 */
  58
  59 struct nr_sock {
  60         struct sock             sock;
  61         ax25_address            user_addr, source_addr, dest_addr;
  62         struct net_device               *device;
  63         unsigned char           my_index,   my_id;
  64         unsigned char           your_index, your_id;
  65         unsigned char           state, condition, bpqext, window;
  66         unsigned short          vs, vr, va, vl;
  67         unsigned char           n2, n2count;
  68         unsigned long           t1, t2, t4, idle;
  69         unsigned short          fraglen;
  70         struct timer_list       t1timer;
  71         struct timer_list       t2timer;
  72         struct timer_list       t4timer;
  73         struct timer_list       idletimer;
  74         struct sk_buff_head     ack_queue;
  75         struct sk_buff_head     reseq_queue;
  76         struct sk_buff_head     frag_queue;
  77 };
  78
  79 #define nr_sk(sk) ((struct nr_sock *)(sk))
  80
  81 struct nr_neigh {
  82         struct hlist_node       neigh_node;
  83         ax25_address            callsign;
  84         ax25_digi               *digipeat;
  85         ax25_cb                 *ax25;
  86         struct net_device       *dev;
  87         unsigned char           quality;
  88         unsigned char           locked;
  89         unsigned short          count;
  90         unsigned int            number;
  91         unsigned char           failed;
  92         atomic_t                refcount;
  93 };
  94
  95 struct nr_route {
  96         unsigned char   quality;
  97         unsigned char   obs_count;
  98         struct nr_neigh *neighbour;
  99 };
 100
 101 struct nr_node {
 102         struct hlist_node       node_node;
 103         ax25_address            callsign;
 104         char                    mnemonic[7];
 105         unsigned char           which;
 106         unsigned char           count;
 107         struct nr_route         routes[3];
 108         atomic_t                refcount;
 109         spinlock_t              node_lock;
 110 };
 111
 112 /*********************************************************************
 113  *      nr_node & nr_neigh lists, refcounting and locking
 114  *********************************************************************/
 115
 116 #define nr_node_hold(__nr_node) \
 117         atomic_inc(&((__nr_node)->refcount))
 118
 119 static __inline__ void nr_node_put(struct nr_node *nr_node)
 120 {
 121         if (atomic_dec_and_test(&nr_node->refcount)) {
 122                 kfree(nr_node);
 123         }
 124 }
 125
 126 #define nr_neigh_hold(__nr_neigh) \
 127         atomic_inc(&((__nr_neigh)->refcount))
 128
 129 static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
 130 {
 131         if (atomic_dec_and_test(&nr_neigh->refcount)) {
 132                 if (nr_neigh->digipeat != NULL)
 133                         kfree(nr_neigh->digipeat);
 134                 kfree(nr_neigh);
 135         }
 136 }
 137
 138 /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
 139  */
 140 static __inline__ void nr_node_lock(struct nr_node *nr_node)
 141 {
 142         nr_node_hold(nr_node);
 143         spin_lock_bh(&nr_node->node_lock);
 144 }
 145
 146 static __inline__ void nr_node_unlock(struct nr_node *nr_node)
 147 {
 148         spin_unlock_bh(&nr_node->node_lock);
 149         nr_node_put(nr_node);
 150 }
 151
 152 #define nr_neigh_for_each(__nr_neigh, node, list) \
 153         hlist_for_each_entry(__nr_neigh, node, list, neigh_node)
 154
 155 #define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \
 156         hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node)
 157
 158 #define nr_node_for_each(__nr_node, node, list) \
 159         hlist_for_each_entry(__nr_node, node, list, node_node)
 160
 161 #define nr_node_for_each_safe(__nr_node, node, node2, list) \
 162         hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node)
 163
 164
 165 /*********************************************************************/
 166
 167 /* af_netrom.c */
 168 extern int  sysctl_netrom_default_path_quality;
 169 extern int  sysctl_netrom_obsolescence_count_initialiser;
 170 extern int  sysctl_netrom_network_ttl_initialiser;
 171 extern int  sysctl_netrom_transport_timeout;
 172 extern int  sysctl_netrom_transport_maximum_tries;
 173 extern int  sysctl_netrom_transport_acknowledge_delay;
 174 extern int  sysctl_netrom_transport_busy_delay;
 175 extern int  sysctl_netrom_transport_requested_window_size;
 176 extern int  sysctl_netrom_transport_no_activity_timeout;
 177 extern int  sysctl_netrom_routing_control;
 178 extern int  sysctl_netrom_link_fails_count;
 179 extern int  nr_rx_frame(struct sk_buff *, struct net_device *);
 180 extern void nr_destroy_socket(struct sock *);
 181
 182 /* nr_dev.c */
 183 extern int  nr_rx_ip(struct sk_buff *, struct net_device *);
 184 extern void nr_setup(struct net_device *);
 185
 186 /* nr_in.c */
 187 extern int  nr_process_rx_frame(struct sock *, struct sk_buff *);
 188
 189 /* nr_loopback.c */
 190 extern void nr_loopback_init(void);
 191 extern void nr_loopback_clear(void);
 192 extern int  nr_loopback_queue(struct sk_buff *);
 193
 194 /* nr_out.c */
 195 extern void nr_output(struct sock *, struct sk_buff *);
 196 extern void nr_send_nak_frame(struct sock *);
 197 extern void nr_kick(struct sock *);
 198 extern void nr_transmit_buffer(struct sock *, struct sk_buff *);
 199 extern void nr_establish_data_link(struct sock *);
 200 extern void nr_enquiry_response(struct sock *);
 201 extern void nr_check_iframes_acked(struct sock *, unsigned short);
 202
 203 /* nr_route.c */
 204 extern void nr_rt_device_down(struct net_device *);
 205 extern struct net_device *nr_dev_first(void);
 206 extern struct net_device *nr_dev_get(ax25_address *);
 207 extern int  nr_rt_ioctl(unsigned int, void __user *);
 208 extern void nr_link_failed(ax25_cb *, int);
 209 extern int  nr_route_frame(struct sk_buff *, ax25_cb *);
 210 extern struct file_operations nr_nodes_fops;
 211 extern struct file_operations nr_neigh_fops;
 212 extern void nr_rt_free(void);
 213
 214 /* nr_subr.c */
 215 extern void nr_clear_queues(struct sock *);
 216 extern void nr_frames_acked(struct sock *, unsigned short);
 217 extern void nr_requeue_frames(struct sock *);
 218 extern int  nr_validate_nr(struct sock *, unsigned short);
 219 extern int  nr_in_rx_window(struct sock *, unsigned short);
 220 extern void nr_write_internal(struct sock *, int);
 221 extern void nr_transmit_refusal(struct sk_buff *, int);
 222 extern void nr_disconnect(struct sock *, int);
 223
 224 /* nr_timer.c */
 225 extern void nr_init_timers(struct sock *sk);
 226 extern void nr_start_heartbeat(struct sock *);
 227 extern void nr_start_t1timer(struct sock *);
 228 extern void nr_start_t2timer(struct sock *);
 229 extern void nr_start_t4timer(struct sock *);
 230 extern void nr_start_idletimer(struct sock *);
 231 extern void nr_stop_heartbeat(struct sock *);
 232 extern void nr_stop_t1timer(struct sock *);
 233 extern void nr_stop_t2timer(struct sock *);
 234 extern void nr_stop_t4timer(struct sock *);
 235 extern void nr_stop_idletimer(struct sock *);
 236 extern int  nr_t1timer_running(struct sock *);
 237
 238 /* sysctl_net_netrom.c */
 239 extern void nr_register_sysctl(void);
 240 extern void nr_unregister_sysctl(void);
 241
 242 #endif