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 120000 /* Outstanding frames - 120 seconds */ 46 #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ 47 #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ 48 #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ 49 #define NR_DEFAULT_IDLE 0 /* 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_sock { 63 struct sock sock; 64 ax25_address user_addr, source_addr, dest_addr; 65 struct net_device *device; 66 unsigned char my_index, my_id; 67 unsigned char your_index, your_id; 68 unsigned char state, condition, bpqext, window; 69 unsigned short vs, vr, va, vl; 70 unsigned char n2, n2count; 71 unsigned long t1, t2, t4, idle; 72 unsigned short fraglen; 73 struct timer_list t1timer; 74 struct timer_list t2timer; 75 struct timer_list t4timer; 76 struct timer_list idletimer; 77 struct sk_buff_head ack_queue; 78 struct sk_buff_head reseq_queue; 79 struct sk_buff_head frag_queue; 80 }; 81 82 #define nr_sk(sk) ((struct nr_sock *)(sk)) 83 84 struct nr_neigh { 85 struct hlist_node neigh_node; 86 ax25_address callsign; 87 ax25_digi *digipeat; 88 ax25_cb *ax25; 89 struct net_device *dev; 90 unsigned char quality; 91 unsigned char locked; 92 unsigned short count; 93 unsigned int number; 94 unsigned char failed; 95 atomic_t refcount; 96 }; 97 98 struct nr_route { 99 unsigned char quality; 100 unsigned char obs_count; 101 struct nr_neigh *neighbour; 102 }; 103 104 struct nr_node { 105 struct hlist_node node_node; 106 ax25_address callsign; 107 char mnemonic[7]; 108 unsigned char which; 109 unsigned char count; 110 struct nr_route routes[3]; 111 atomic_t refcount; 112 spinlock_t node_lock; 113 }; 114 115 /********************************************************************* 116 * nr_node & nr_neigh lists, refcounting and locking 117 *********************************************************************/ 118 119 #define nr_node_hold(__nr_node) \ 120 atomic_inc(&((__nr_node)->refcount)) 121 122 static __inline__ void nr_node_put(struct nr_node *nr_node) 123 { 124 if (atomic_dec_and_test(&nr_node->refcount)) { 125 kfree(nr_node); 126 } 127 } 128 129 #define nr_neigh_hold(__nr_neigh) \ 130 atomic_inc(&((__nr_neigh)->refcount)) 131 132 static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) 133 { 134 if (atomic_dec_and_test(&nr_neigh->refcount)) { 135 kfree(nr_neigh->digipeat); 136 kfree(nr_neigh); 137 } 138 } 139 140 /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. 141 */ 142 static __inline__ void nr_node_lock(struct nr_node *nr_node) 143 { 144 nr_node_hold(nr_node); 145 spin_lock_bh(&nr_node->node_lock); 146 } 147 148 static __inline__ void nr_node_unlock(struct nr_node *nr_node) 149 { 150 spin_unlock_bh(&nr_node->node_lock); 151 nr_node_put(nr_node); 152 } 153 154 #define nr_neigh_for_each(__nr_neigh, node, list) \ 155 hlist_for_each_entry(__nr_neigh, node, list, neigh_node) 156 157 #define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \ 158 hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node) 159 160 #define nr_node_for_each(__nr_node, node, list) \ 161 hlist_for_each_entry(__nr_node, node, list, node_node) 162 163 #define nr_node_for_each_safe(__nr_node, node, node2, list) \ 164 hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node) 165 166 167 /*********************************************************************/ 168 169 /* af_netrom.c */ 170 extern int sysctl_netrom_default_path_quality; 171 extern int sysctl_netrom_obsolescence_count_initialiser; 172 extern int sysctl_netrom_network_ttl_initialiser; 173 extern int sysctl_netrom_transport_timeout; 174 extern int sysctl_netrom_transport_maximum_tries; 175 extern int sysctl_netrom_transport_acknowledge_delay; 176 extern int sysctl_netrom_transport_busy_delay; 177 extern int sysctl_netrom_transport_requested_window_size; 178 extern int sysctl_netrom_transport_no_activity_timeout; 179 extern int sysctl_netrom_routing_control; 180 extern int sysctl_netrom_link_fails_count; 181 extern int sysctl_netrom_reset_circuit; 182 183 extern int nr_rx_frame(struct sk_buff *, struct net_device *); 184 extern void nr_destroy_socket(struct sock *); 185 186 /* nr_dev.c */ 187 extern int nr_rx_ip(struct sk_buff *, struct net_device *); 188 extern void nr_setup(struct net_device *); 189 190 /* nr_in.c */ 191 extern int nr_process_rx_frame(struct sock *, struct sk_buff *); 192 193 /* nr_loopback.c */ 194 extern void nr_loopback_init(void); 195 extern void nr_loopback_clear(void); 196 extern int nr_loopback_queue(struct sk_buff *); 197 198 /* nr_out.c */ 199 extern void nr_output(struct sock *, struct sk_buff *); 200 extern void nr_send_nak_frame(struct sock *); 201 extern void nr_kick(struct sock *); 202 extern void nr_transmit_buffer(struct sock *, struct sk_buff *); 203 extern void nr_establish_data_link(struct sock *); 204 extern void nr_enquiry_response(struct sock *); 205 extern void nr_check_iframes_acked(struct sock *, unsigned short); 206 207 /* nr_route.c */ 208 extern void nr_rt_device_down(struct net_device *); 209 extern struct net_device *nr_dev_first(void); 210 extern struct net_device *nr_dev_get(ax25_address *); 211 extern int nr_rt_ioctl(unsigned int, void __user *); 212 extern void nr_link_failed(ax25_cb *, int); 213 extern int nr_route_frame(struct sk_buff *, ax25_cb *); 214 extern const struct file_operations nr_nodes_fops; 215 extern const struct file_operations nr_neigh_fops; 216 extern void nr_rt_free(void); 217 218 /* nr_subr.c */ 219 extern void nr_clear_queues(struct sock *); 220 extern void nr_frames_acked(struct sock *, unsigned short); 221 extern void nr_requeue_frames(struct sock *); 222 extern int nr_validate_nr(struct sock *, unsigned short); 223 extern int nr_in_rx_window(struct sock *, unsigned short); 224 extern void nr_write_internal(struct sock *, int); 225 226 extern void __nr_transmit_reply(struct sk_buff *skb, int mine, 227 unsigned char cmdflags); 228 229 /* 230 * This routine is called when a Connect Acknowledge with the Choke Flag 231 * set is needed to refuse a connection. 232 */ 233 #define nr_transmit_refusal(skb, mine) \ 234 do { \ 235 __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ 236 } while (0) 237 238 /* 239 * This routine is called when we don't have a circuit matching an incoming 240 * NET/ROM packet. This is an G8PZT Xrouter extension. 241 */ 242 #define nr_transmit_reset(skb, mine) \ 243 do { \ 244 __nr_transmit_reply((skb), (mine), NR_RESET); \ 245 } while (0) 246 247 extern void nr_disconnect(struct sock *, int); 248 249 /* nr_timer.c */ 250 extern void nr_init_timers(struct sock *sk); 251 extern void nr_start_heartbeat(struct sock *); 252 extern void nr_start_t1timer(struct sock *); 253 extern void nr_start_t2timer(struct sock *); 254 extern void nr_start_t4timer(struct sock *); 255 extern void nr_start_idletimer(struct sock *); 256 extern void nr_stop_heartbeat(struct sock *); 257 extern void nr_stop_t1timer(struct sock *); 258 extern void nr_stop_t2timer(struct sock *); 259 extern void nr_stop_t4timer(struct sock *); 260 extern void nr_stop_idletimer(struct sock *); 261 extern int nr_t1timer_running(struct sock *); 262 263 /* sysctl_net_netrom.c */ 264 extern void nr_register_sysctl(void); 265 extern void nr_unregister_sysctl(void); 266 267 #endif 268