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 #include <linux/refcount.h> 15 16 #define NR_NETWORK_LEN 15 17 #define NR_TRANSPORT_LEN 5 18 19 #define NR_PROTO_IP 0x0C 20 21 #define NR_PROTOEXT 0x00 22 #define NR_CONNREQ 0x01 23 #define NR_CONNACK 0x02 24 #define NR_DISCREQ 0x03 25 #define NR_DISCACK 0x04 26 #define NR_INFO 0x05 27 #define NR_INFOACK 0x06 28 #define NR_RESET 0x07 29 30 #define NR_CHOKE_FLAG 0x80 31 #define NR_NAK_FLAG 0x40 32 #define NR_MORE_FLAG 0x20 33 34 /* Define Link State constants. */ 35 enum { 36 NR_STATE_0, 37 NR_STATE_1, 38 NR_STATE_2, 39 NR_STATE_3 40 }; 41 42 #define NR_COND_ACK_PENDING 0x01 43 #define NR_COND_REJECT 0x02 44 #define NR_COND_PEER_RX_BUSY 0x04 45 #define NR_COND_OWN_RX_BUSY 0x08 46 47 #define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */ 48 #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ 49 #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ 50 #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ 51 #define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */ 52 #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ 53 #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ 54 #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ 55 #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ 56 #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ 57 #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ 58 #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ 59 60 #define NR_MODULUS 256 61 #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ 62 #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ 63 64 struct nr_sock { 65 struct sock sock; 66 ax25_address user_addr, source_addr, dest_addr; 67 struct net_device *device; 68 unsigned char my_index, my_id; 69 unsigned char your_index, your_id; 70 unsigned char state, condition, bpqext, window; 71 unsigned short vs, vr, va, vl; 72 unsigned char n2, n2count; 73 unsigned long t1, t2, t4, idle; 74 unsigned short fraglen; 75 struct timer_list t1timer; 76 struct timer_list t2timer; 77 struct timer_list t4timer; 78 struct timer_list idletimer; 79 struct sk_buff_head ack_queue; 80 struct sk_buff_head reseq_queue; 81 struct sk_buff_head frag_queue; 82 }; 83 84 #define nr_sk(sk) ((struct nr_sock *)(sk)) 85 86 struct nr_neigh { 87 struct hlist_node neigh_node; 88 ax25_address callsign; 89 ax25_digi *digipeat; 90 ax25_cb *ax25; 91 struct net_device *dev; 92 unsigned char quality; 93 unsigned char locked; 94 unsigned short count; 95 unsigned int number; 96 unsigned char failed; 97 refcount_t refcount; 98 }; 99 100 struct nr_route { 101 unsigned char quality; 102 unsigned char obs_count; 103 struct nr_neigh *neighbour; 104 }; 105 106 struct nr_node { 107 struct hlist_node node_node; 108 ax25_address callsign; 109 char mnemonic[7]; 110 unsigned char which; 111 unsigned char count; 112 struct nr_route routes[3]; 113 refcount_t refcount; 114 spinlock_t node_lock; 115 }; 116 117 /********************************************************************* 118 * nr_node & nr_neigh lists, refcounting and locking 119 *********************************************************************/ 120 121 #define nr_node_hold(__nr_node) \ 122 refcount_inc(&((__nr_node)->refcount)) 123 124 static __inline__ void nr_node_put(struct nr_node *nr_node) 125 { 126 if (refcount_dec_and_test(&nr_node->refcount)) { 127 kfree(nr_node); 128 } 129 } 130 131 #define nr_neigh_hold(__nr_neigh) \ 132 refcount_inc(&((__nr_neigh)->refcount)) 133 134 static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) 135 { 136 if (refcount_dec_and_test(&nr_neigh->refcount)) { 137 if (nr_neigh->ax25) 138 ax25_cb_put(nr_neigh->ax25); 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, list) \ 159 hlist_for_each_entry(__nr_neigh, list, neigh_node) 160 161 #define nr_neigh_for_each_safe(__nr_neigh, node2, list) \ 162 hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node) 163 164 #define nr_node_for_each(__nr_node, list) \ 165 hlist_for_each_entry(__nr_node, list, node_node) 166 167 #define nr_node_for_each_safe(__nr_node, node2, list) \ 168 hlist_for_each_entry_safe(__nr_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 int nr_rx_frame(struct sk_buff *, struct net_device *); 188 void nr_destroy_socket(struct sock *); 189 190 /* nr_dev.c */ 191 int nr_rx_ip(struct sk_buff *, struct net_device *); 192 void nr_setup(struct net_device *); 193 194 /* nr_in.c */ 195 int nr_process_rx_frame(struct sock *, struct sk_buff *); 196 197 /* nr_loopback.c */ 198 void nr_loopback_init(void); 199 void nr_loopback_clear(void); 200 int nr_loopback_queue(struct sk_buff *); 201 202 /* nr_out.c */ 203 void nr_output(struct sock *, struct sk_buff *); 204 void nr_send_nak_frame(struct sock *); 205 void nr_kick(struct sock *); 206 void nr_transmit_buffer(struct sock *, struct sk_buff *); 207 void nr_establish_data_link(struct sock *); 208 void nr_enquiry_response(struct sock *); 209 void nr_check_iframes_acked(struct sock *, unsigned short); 210 211 /* nr_route.c */ 212 void nr_rt_device_down(struct net_device *); 213 struct net_device *nr_dev_first(void); 214 struct net_device *nr_dev_get(ax25_address *); 215 int nr_rt_ioctl(unsigned int, void __user *); 216 void nr_link_failed(ax25_cb *, int); 217 int nr_route_frame(struct sk_buff *, ax25_cb *); 218 extern const struct file_operations nr_nodes_fops; 219 extern const struct file_operations nr_neigh_fops; 220 void nr_rt_free(void); 221 222 /* nr_subr.c */ 223 void nr_clear_queues(struct sock *); 224 void nr_frames_acked(struct sock *, unsigned short); 225 void nr_requeue_frames(struct sock *); 226 int nr_validate_nr(struct sock *, unsigned short); 227 int nr_in_rx_window(struct sock *, unsigned short); 228 void nr_write_internal(struct sock *, int); 229 230 void __nr_transmit_reply(struct sk_buff *skb, int mine, 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 void nr_disconnect(struct sock *, int); 251 252 /* nr_timer.c */ 253 void nr_init_timers(struct sock *sk); 254 void nr_start_heartbeat(struct sock *); 255 void nr_start_t1timer(struct sock *); 256 void nr_start_t2timer(struct sock *); 257 void nr_start_t4timer(struct sock *); 258 void nr_start_idletimer(struct sock *); 259 void nr_stop_heartbeat(struct sock *); 260 void nr_stop_t1timer(struct sock *); 261 void nr_stop_t2timer(struct sock *); 262 void nr_stop_t4timer(struct sock *); 263 void nr_stop_idletimer(struct sock *); 264 int nr_t1timer_running(struct sock *); 265 266 /* sysctl_net_netrom.c */ 267 void nr_register_sysctl(void); 268 void nr_unregister_sysctl(void); 269 270 #endif 271