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 <linux/slab.h> 13 #include <net/sock.h> 14 15 #define NR_NETWORK_LEN 15 16 #define NR_TRANSPORT_LEN 5 17 18 #define NR_PROTO_IP 0x0C 19 20 #define NR_PROTOEXT 0x00 21 #define NR_CONNREQ 0x01 22 #define NR_CONNACK 0x02 23 #define NR_DISCREQ 0x03 24 #define NR_DISCACK 0x04 25 #define NR_INFO 0x05 26 #define NR_INFOACK 0x06 27 #define NR_RESET 0x07 28 29 #define NR_CHOKE_FLAG 0x80 30 #define NR_NAK_FLAG 0x40 31 #define NR_MORE_FLAG 0x20 32 33 /* Define Link State constants. */ 34 enum { 35 NR_STATE_0, 36 NR_STATE_1, 37 NR_STATE_2, 38 NR_STATE_3 39 }; 40 41 #define NR_COND_ACK_PENDING 0x01 42 #define NR_COND_REJECT 0x02 43 #define NR_COND_PEER_RX_BUSY 0x04 44 #define NR_COND_OWN_RX_BUSY 0x08 45 46 #define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */ 47 #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ 48 #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ 49 #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ 50 #define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */ 51 #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ 52 #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ 53 #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ 54 #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ 55 #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ 56 #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ 57 #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ 58 59 #define NR_MODULUS 256 60 #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ 61 #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ 62 63 struct nr_sock { 64 struct sock sock; 65 ax25_address user_addr, source_addr, dest_addr; 66 struct net_device *device; 67 unsigned char my_index, my_id; 68 unsigned char your_index, your_id; 69 unsigned char state, condition, bpqext, window; 70 unsigned short vs, vr, va, vl; 71 unsigned char n2, n2count; 72 unsigned long t1, t2, t4, idle; 73 unsigned short fraglen; 74 struct timer_list t1timer; 75 struct timer_list t2timer; 76 struct timer_list t4timer; 77 struct timer_list idletimer; 78 struct sk_buff_head ack_queue; 79 struct sk_buff_head reseq_queue; 80 struct sk_buff_head frag_queue; 81 }; 82 83 #define nr_sk(sk) ((struct nr_sock *)(sk)) 84 85 struct nr_neigh { 86 struct hlist_node neigh_node; 87 ax25_address callsign; 88 ax25_digi *digipeat; 89 ax25_cb *ax25; 90 struct net_device *dev; 91 unsigned char quality; 92 unsigned char locked; 93 unsigned short count; 94 unsigned int number; 95 unsigned char failed; 96 atomic_t refcount; 97 }; 98 99 struct nr_route { 100 unsigned char quality; 101 unsigned char obs_count; 102 struct nr_neigh *neighbour; 103 }; 104 105 struct nr_node { 106 struct hlist_node node_node; 107 ax25_address callsign; 108 char mnemonic[7]; 109 unsigned char which; 110 unsigned char count; 111 struct nr_route routes[3]; 112 atomic_t refcount; 113 spinlock_t node_lock; 114 }; 115 116 /********************************************************************* 117 * nr_node & nr_neigh lists, refcounting and locking 118 *********************************************************************/ 119 120 #define nr_node_hold(__nr_node) \ 121 atomic_inc(&((__nr_node)->refcount)) 122 123 static __inline__ void nr_node_put(struct nr_node *nr_node) 124 { 125 if (atomic_dec_and_test(&nr_node->refcount)) { 126 kfree(nr_node); 127 } 128 } 129 130 #define nr_neigh_hold(__nr_neigh) \ 131 atomic_inc(&((__nr_neigh)->refcount)) 132 133 static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) 134 { 135 if (atomic_dec_and_test(&nr_neigh->refcount)) { 136 if (nr_neigh->ax25) 137 ax25_cb_put(nr_neigh->ax25); 138 kfree(nr_neigh->digipeat); 139 kfree(nr_neigh); 140 } 141 } 142 143 /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. 144 */ 145 static __inline__ void nr_node_lock(struct nr_node *nr_node) 146 { 147 nr_node_hold(nr_node); 148 spin_lock_bh(&nr_node->node_lock); 149 } 150 151 static __inline__ void nr_node_unlock(struct nr_node *nr_node) 152 { 153 spin_unlock_bh(&nr_node->node_lock); 154 nr_node_put(nr_node); 155 } 156 157 #define nr_neigh_for_each(__nr_neigh, node, list) \ 158 hlist_for_each_entry(__nr_neigh, node, list, neigh_node) 159 160 #define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \ 161 hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node) 162 163 #define nr_node_for_each(__nr_node, node, list) \ 164 hlist_for_each_entry(__nr_node, node, list, node_node) 165 166 #define nr_node_for_each_safe(__nr_node, node, node2, list) \ 167 hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node) 168 169 170 /*********************************************************************/ 171 172 /* af_netrom.c */ 173 extern int sysctl_netrom_default_path_quality; 174 extern int sysctl_netrom_obsolescence_count_initialiser; 175 extern int sysctl_netrom_network_ttl_initialiser; 176 extern int sysctl_netrom_transport_timeout; 177 extern int sysctl_netrom_transport_maximum_tries; 178 extern int sysctl_netrom_transport_acknowledge_delay; 179 extern int sysctl_netrom_transport_busy_delay; 180 extern int sysctl_netrom_transport_requested_window_size; 181 extern int sysctl_netrom_transport_no_activity_timeout; 182 extern int sysctl_netrom_routing_control; 183 extern int sysctl_netrom_link_fails_count; 184 extern int sysctl_netrom_reset_circuit; 185 186 extern int nr_rx_frame(struct sk_buff *, struct net_device *); 187 extern void nr_destroy_socket(struct sock *); 188 189 /* nr_dev.c */ 190 extern int nr_rx_ip(struct sk_buff *, struct net_device *); 191 extern void nr_setup(struct net_device *); 192 193 /* nr_in.c */ 194 extern int nr_process_rx_frame(struct sock *, struct sk_buff *); 195 196 /* nr_loopback.c */ 197 extern void nr_loopback_init(void); 198 extern void nr_loopback_clear(void); 199 extern int nr_loopback_queue(struct sk_buff *); 200 201 /* nr_out.c */ 202 extern void nr_output(struct sock *, struct sk_buff *); 203 extern void nr_send_nak_frame(struct sock *); 204 extern void nr_kick(struct sock *); 205 extern void nr_transmit_buffer(struct sock *, struct sk_buff *); 206 extern void nr_establish_data_link(struct sock *); 207 extern void nr_enquiry_response(struct sock *); 208 extern void nr_check_iframes_acked(struct sock *, unsigned short); 209 210 /* nr_route.c */ 211 extern void nr_rt_device_down(struct net_device *); 212 extern struct net_device *nr_dev_first(void); 213 extern struct net_device *nr_dev_get(ax25_address *); 214 extern int nr_rt_ioctl(unsigned int, void __user *); 215 extern void nr_link_failed(ax25_cb *, int); 216 extern int nr_route_frame(struct sk_buff *, ax25_cb *); 217 extern const struct file_operations nr_nodes_fops; 218 extern const struct file_operations nr_neigh_fops; 219 extern void nr_rt_free(void); 220 221 /* nr_subr.c */ 222 extern void nr_clear_queues(struct sock *); 223 extern void nr_frames_acked(struct sock *, unsigned short); 224 extern void nr_requeue_frames(struct sock *); 225 extern int nr_validate_nr(struct sock *, unsigned short); 226 extern int nr_in_rx_window(struct sock *, unsigned short); 227 extern void nr_write_internal(struct sock *, int); 228 229 extern void __nr_transmit_reply(struct sk_buff *skb, int mine, 230 unsigned char cmdflags); 231 232 /* 233 * This routine is called when a Connect Acknowledge with the Choke Flag 234 * set is needed to refuse a connection. 235 */ 236 #define nr_transmit_refusal(skb, mine) \ 237 do { \ 238 __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ 239 } while (0) 240 241 /* 242 * This routine is called when we don't have a circuit matching an incoming 243 * NET/ROM packet. This is an G8PZT Xrouter extension. 244 */ 245 #define nr_transmit_reset(skb, mine) \ 246 do { \ 247 __nr_transmit_reply((skb), (mine), NR_RESET); \ 248 } while (0) 249 250 extern void nr_disconnect(struct sock *, int); 251 252 /* nr_timer.c */ 253 extern void nr_init_timers(struct sock *sk); 254 extern void nr_start_heartbeat(struct sock *); 255 extern void nr_start_t1timer(struct sock *); 256 extern void nr_start_t2timer(struct sock *); 257 extern void nr_start_t4timer(struct sock *); 258 extern void nr_start_idletimer(struct sock *); 259 extern void nr_stop_heartbeat(struct sock *); 260 extern void nr_stop_t1timer(struct sock *); 261 extern void nr_stop_t2timer(struct sock *); 262 extern void nr_stop_t4timer(struct sock *); 263 extern void nr_stop_idletimer(struct sock *); 264 extern int nr_t1timer_running(struct sock *); 265 266 /* sysctl_net_netrom.c */ 267 extern void nr_register_sysctl(void); 268 extern void nr_unregister_sysctl(void); 269 270 #endif 271