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 243