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 10 #include <linux/netrom.h> 11 #include <linux/list.h> 12 #include <net/sock.h> 13 14 #define NR_NETWORK_LEN 15 15 #define NR_TRANSPORT_LEN 5 16 17 #define NR_PROTO_IP 0x0C 18 19 #define NR_PROTOEXT 0x00 20 #define NR_CONNREQ 0x01 21 #define NR_CONNACK 0x02 22 #define NR_DISCREQ 0x03 23 #define NR_DISCACK 0x04 24 #define NR_INFO 0x05 25 #define NR_INFOACK 0x06 26 #define NR_RESET 0x07 27 28 #define NR_CHOKE_FLAG 0x80 29 #define NR_NAK_FLAG 0x40 30 #define NR_MORE_FLAG 0x20 31 32 /* Define Link State constants. */ 33 enum { 34 NR_STATE_0, 35 NR_STATE_1, 36 NR_STATE_2, 37 NR_STATE_3 38 }; 39 40 #define NR_COND_ACK_PENDING 0x01 41 #define NR_COND_REJECT 0x02 42 #define NR_COND_PEER_RX_BUSY 0x04 43 #define NR_COND_OWN_RX_BUSY 0x08 44 45 #define NR_DEFAULT_T1 (120 * HZ) /* Outstanding frames - 120 seconds */ 46 #define NR_DEFAULT_T2 (5 * HZ) /* Response delay - 5 seconds */ 47 #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ 48 #define NR_DEFAULT_T4 (180 * HZ) /* Busy Delay - 180 seconds */ 49 #define NR_DEFAULT_IDLE (0 * 60 * HZ) /* No Activity Timeout - none */ 50 #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ 51 #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ 52 #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ 53 #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ 54 #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ 55 #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ 56 #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ 57 58 #define NR_MODULUS 256 59 #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ 60 #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ 61 62 struct nr_private { 63 struct net_device_stats stats; 64 }; 65 66 struct nr_sock { 67 struct sock sock; 68 ax25_address user_addr, source_addr, dest_addr; 69 struct net_device *device; 70 unsigned char my_index, my_id; 71 unsigned char your_index, your_id; 72 unsigned char state, condition, bpqext, window; 73 unsigned short vs, vr, va, vl; 74 unsigned char n2, n2count; 75 unsigned long t1, t2, t4, idle; 76 unsigned short fraglen; 77 struct timer_list t1timer; 78 struct timer_list t2timer; 79 struct timer_list t4timer; 80 struct timer_list idletimer; 81 struct sk_buff_head ack_queue; 82 struct sk_buff_head reseq_queue; 83 struct sk_buff_head frag_queue; 84 }; 85 86 #define nr_sk(sk) ((struct nr_sock *)(sk)) 87 88 struct nr_neigh { 89 struct hlist_node neigh_node; 90 ax25_address callsign; 91 ax25_digi *digipeat; 92 ax25_cb *ax25; 93 struct net_device *dev; 94 unsigned char quality; 95 unsigned char locked; 96 unsigned short count; 97 unsigned int number; 98 unsigned char failed; 99 atomic_t refcount; 100 }; 101 102 struct nr_route { 103 unsigned char quality; 104 unsigned char obs_count; 105 struct nr_neigh *neighbour; 106 }; 107 108 struct nr_node { 109 struct hlist_node node_node; 110 ax25_address callsign; 111 char mnemonic[7]; 112 unsigned char which; 113 unsigned char count; 114 struct nr_route routes[3]; 115 atomic_t refcount; 116 spinlock_t node_lock; 117 }; 118 119 /********************************************************************* 120 * nr_node & nr_neigh lists, refcounting and locking 121 *********************************************************************/ 122 123 #define nr_node_hold(__nr_node) \ 124 atomic_inc(&((__nr_node)->refcount)) 125 126 static __inline__ void nr_node_put(struct nr_node *nr_node) 127 { 128 if (atomic_dec_and_test(&nr_node->refcount)) { 129 kfree(nr_node); 130 } 131 } 132 133 #define nr_neigh_hold(__nr_neigh) \ 134 atomic_inc(&((__nr_neigh)->refcount)) 135 136 static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) 137 { 138 if (atomic_dec_and_test(&nr_neigh->refcount)) { 139 kfree(nr_neigh->digipeat); 140 kfree(nr_neigh); 141 } 142 } 143 144 /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. 145 */ 146 static __inline__ void nr_node_lock(struct nr_node *nr_node) 147 { 148 nr_node_hold(nr_node); 149 spin_lock_bh(&nr_node->node_lock); 150 } 151 152 static __inline__ void nr_node_unlock(struct nr_node *nr_node) 153 { 154 spin_unlock_bh(&nr_node->node_lock); 155 nr_node_put(nr_node); 156 } 157 158 #define nr_neigh_for_each(__nr_neigh, node, list) \ 159 hlist_for_each_entry(__nr_neigh, node, list, neigh_node) 160 161 #define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \ 162 hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node) 163 164 #define nr_node_for_each(__nr_node, node, list) \ 165 hlist_for_each_entry(__nr_node, node, list, node_node) 166 167 #define nr_node_for_each_safe(__nr_node, node, node2, list) \ 168 hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node) 169 170 171 /*********************************************************************/ 172 173 /* af_netrom.c */ 174 extern int sysctl_netrom_default_path_quality; 175 extern int sysctl_netrom_obsolescence_count_initialiser; 176 extern int sysctl_netrom_network_ttl_initialiser; 177 extern int sysctl_netrom_transport_timeout; 178 extern int sysctl_netrom_transport_maximum_tries; 179 extern int sysctl_netrom_transport_acknowledge_delay; 180 extern int sysctl_netrom_transport_busy_delay; 181 extern int sysctl_netrom_transport_requested_window_size; 182 extern int sysctl_netrom_transport_no_activity_timeout; 183 extern int sysctl_netrom_routing_control; 184 extern int sysctl_netrom_link_fails_count; 185 extern int sysctl_netrom_reset_circuit; 186 187 extern int nr_rx_frame(struct sk_buff *, struct net_device *); 188 extern void nr_destroy_socket(struct sock *); 189 190 /* nr_dev.c */ 191 extern int nr_rx_ip(struct sk_buff *, struct net_device *); 192 extern void nr_setup(struct net_device *); 193 194 /* nr_in.c */ 195 extern int nr_process_rx_frame(struct sock *, struct sk_buff *); 196 197 /* nr_loopback.c */ 198 extern void nr_loopback_init(void); 199 extern void nr_loopback_clear(void); 200 extern int nr_loopback_queue(struct sk_buff *); 201 202 /* nr_out.c */ 203 extern void nr_output(struct sock *, struct sk_buff *); 204 extern void nr_send_nak_frame(struct sock *); 205 extern void nr_kick(struct sock *); 206 extern void nr_transmit_buffer(struct sock *, struct sk_buff *); 207 extern void nr_establish_data_link(struct sock *); 208 extern void nr_enquiry_response(struct sock *); 209 extern void nr_check_iframes_acked(struct sock *, unsigned short); 210 211 /* nr_route.c */ 212 extern void nr_rt_device_down(struct net_device *); 213 extern struct net_device *nr_dev_first(void); 214 extern struct net_device *nr_dev_get(ax25_address *); 215 extern int nr_rt_ioctl(unsigned int, void __user *); 216 extern void nr_link_failed(ax25_cb *, int); 217 extern int nr_route_frame(struct sk_buff *, ax25_cb *); 218 extern struct file_operations nr_nodes_fops; 219 extern struct file_operations nr_neigh_fops; 220 extern void nr_rt_free(void); 221 222 /* nr_subr.c */ 223 extern void nr_clear_queues(struct sock *); 224 extern void nr_frames_acked(struct sock *, unsigned short); 225 extern void nr_requeue_frames(struct sock *); 226 extern int nr_validate_nr(struct sock *, unsigned short); 227 extern int nr_in_rx_window(struct sock *, unsigned short); 228 extern void nr_write_internal(struct sock *, int); 229 230 extern void __nr_transmit_reply(struct sk_buff *skb, int mine, 231 unsigned char cmdflags); 232 233 /* 234 * This routine is called when a Connect Acknowledge with the Choke Flag 235 * set is needed to refuse a connection. 236 */ 237 #define nr_transmit_refusal(skb, mine) \ 238 do { \ 239 __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ 240 } while (0) 241 242 /* 243 * This routine is called when we don't have a circuit matching an incoming 244 * NET/ROM packet. This is an G8PZT Xrouter extension. 245 */ 246 #define nr_transmit_reset(skb, mine) \ 247 do { \ 248 __nr_transmit_reply((skb), (mine), NR_RESET); \ 249 } while (0) 250 251 extern void nr_disconnect(struct sock *, int); 252 253 /* nr_timer.c */ 254 extern void nr_init_timers(struct sock *sk); 255 extern void nr_start_heartbeat(struct sock *); 256 extern void nr_start_t1timer(struct sock *); 257 extern void nr_start_t2timer(struct sock *); 258 extern void nr_start_t4timer(struct sock *); 259 extern void nr_start_idletimer(struct sock *); 260 extern void nr_stop_heartbeat(struct sock *); 261 extern void nr_stop_t1timer(struct sock *); 262 extern void nr_stop_t2timer(struct sock *); 263 extern void nr_stop_t4timer(struct sock *); 264 extern void nr_stop_idletimer(struct sock *); 265 extern int nr_t1timer_running(struct sock *); 266 267 /* sysctl_net_netrom.c */ 268 extern void nr_register_sysctl(void); 269 extern void nr_unregister_sysctl(void); 270 271 #endif 272