1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Declarations of NET/ROM type objects. 4 * 5 * Jonathan Naylor G4KLX 9/4/95 6 */ 7 8 #ifndef _NETROM_H 9 #define _NETROM_H 10 11 #include <linux/netrom.h> 12 #include <linux/list.h> 13 #include <linux/slab.h> 14 #include <net/sock.h> 15 #include <linux/refcount.h> 16 #include <linux/seq_file.h> 17 18 #define NR_NETWORK_LEN 15 19 #define NR_TRANSPORT_LEN 5 20 21 #define NR_PROTO_IP 0x0C 22 23 #define NR_PROTOEXT 0x00 24 #define NR_CONNREQ 0x01 25 #define NR_CONNACK 0x02 26 #define NR_DISCREQ 0x03 27 #define NR_DISCACK 0x04 28 #define NR_INFO 0x05 29 #define NR_INFOACK 0x06 30 #define NR_RESET 0x07 31 32 #define NR_CHOKE_FLAG 0x80 33 #define NR_NAK_FLAG 0x40 34 #define NR_MORE_FLAG 0x20 35 36 /* Define Link State constants. */ 37 enum { 38 NR_STATE_0, 39 NR_STATE_1, 40 NR_STATE_2, 41 NR_STATE_3 42 }; 43 44 #define NR_COND_ACK_PENDING 0x01 45 #define NR_COND_REJECT 0x02 46 #define NR_COND_PEER_RX_BUSY 0x04 47 #define NR_COND_OWN_RX_BUSY 0x08 48 49 #define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */ 50 #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ 51 #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ 52 #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ 53 #define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */ 54 #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ 55 #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ 56 #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ 57 #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ 58 #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ 59 #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ 60 #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ 61 62 #define NR_MODULUS 256 63 #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ 64 #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ 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 refcount_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 refcount_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 refcount_inc(&((__nr_node)->refcount)) 125 126 static __inline__ void nr_node_put(struct nr_node *nr_node) 127 { 128 if (refcount_dec_and_test(&nr_node->refcount)) { 129 kfree(nr_node); 130 } 131 } 132 133 #define nr_neigh_hold(__nr_neigh) \ 134 refcount_inc(&((__nr_neigh)->refcount)) 135 136 static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) 137 { 138 if (refcount_dec_and_test(&nr_neigh->refcount)) { 139 if (nr_neigh->ax25) 140 ax25_cb_put(nr_neigh->ax25); 141 kfree(nr_neigh->digipeat); 142 kfree(nr_neigh); 143 } 144 } 145 146 /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. 147 */ 148 static __inline__ void nr_node_lock(struct nr_node *nr_node) 149 { 150 nr_node_hold(nr_node); 151 spin_lock_bh(&nr_node->node_lock); 152 } 153 154 static __inline__ void nr_node_unlock(struct nr_node *nr_node) 155 { 156 spin_unlock_bh(&nr_node->node_lock); 157 nr_node_put(nr_node); 158 } 159 160 #define nr_neigh_for_each(__nr_neigh, list) \ 161 hlist_for_each_entry(__nr_neigh, list, neigh_node) 162 163 #define nr_neigh_for_each_safe(__nr_neigh, node2, list) \ 164 hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node) 165 166 #define nr_node_for_each(__nr_node, list) \ 167 hlist_for_each_entry(__nr_node, list, node_node) 168 169 #define nr_node_for_each_safe(__nr_node, node2, list) \ 170 hlist_for_each_entry_safe(__nr_node, node2, list, node_node) 171 172 173 /*********************************************************************/ 174 175 /* af_netrom.c */ 176 extern int sysctl_netrom_default_path_quality; 177 extern int sysctl_netrom_obsolescence_count_initialiser; 178 extern int sysctl_netrom_network_ttl_initialiser; 179 extern int sysctl_netrom_transport_timeout; 180 extern int sysctl_netrom_transport_maximum_tries; 181 extern int sysctl_netrom_transport_acknowledge_delay; 182 extern int sysctl_netrom_transport_busy_delay; 183 extern int sysctl_netrom_transport_requested_window_size; 184 extern int sysctl_netrom_transport_no_activity_timeout; 185 extern int sysctl_netrom_routing_control; 186 extern int sysctl_netrom_link_fails_count; 187 extern int sysctl_netrom_reset_circuit; 188 189 int nr_rx_frame(struct sk_buff *, struct net_device *); 190 void nr_destroy_socket(struct sock *); 191 192 /* nr_dev.c */ 193 int nr_rx_ip(struct sk_buff *, struct net_device *); 194 void nr_setup(struct net_device *); 195 196 /* nr_in.c */ 197 int nr_process_rx_frame(struct sock *, struct sk_buff *); 198 199 /* nr_loopback.c */ 200 void nr_loopback_init(void); 201 void nr_loopback_clear(void); 202 int nr_loopback_queue(struct sk_buff *); 203 204 /* nr_out.c */ 205 void nr_output(struct sock *, struct sk_buff *); 206 void nr_send_nak_frame(struct sock *); 207 void nr_kick(struct sock *); 208 void nr_transmit_buffer(struct sock *, struct sk_buff *); 209 void nr_establish_data_link(struct sock *); 210 void nr_enquiry_response(struct sock *); 211 void nr_check_iframes_acked(struct sock *, unsigned short); 212 213 /* nr_route.c */ 214 void nr_rt_device_down(struct net_device *); 215 struct net_device *nr_dev_first(void); 216 struct net_device *nr_dev_get(ax25_address *); 217 int nr_rt_ioctl(unsigned int, void __user *); 218 void nr_link_failed(ax25_cb *, int); 219 int nr_route_frame(struct sk_buff *, ax25_cb *); 220 extern const struct seq_operations nr_node_seqops; 221 extern const struct seq_operations nr_neigh_seqops; 222 void nr_rt_free(void); 223 224 /* nr_subr.c */ 225 void nr_clear_queues(struct sock *); 226 void nr_frames_acked(struct sock *, unsigned short); 227 void nr_requeue_frames(struct sock *); 228 int nr_validate_nr(struct sock *, unsigned short); 229 int nr_in_rx_window(struct sock *, unsigned short); 230 void nr_write_internal(struct sock *, int); 231 232 void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags); 233 234 /* 235 * This routine is called when a Connect Acknowledge with the Choke Flag 236 * set is needed to refuse a connection. 237 */ 238 #define nr_transmit_refusal(skb, mine) \ 239 do { \ 240 __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ 241 } while (0) 242 243 /* 244 * This routine is called when we don't have a circuit matching an incoming 245 * NET/ROM packet. This is an G8PZT Xrouter extension. 246 */ 247 #define nr_transmit_reset(skb, mine) \ 248 do { \ 249 __nr_transmit_reply((skb), (mine), NR_RESET); \ 250 } while (0) 251 252 void nr_disconnect(struct sock *, int); 253 254 /* nr_timer.c */ 255 void nr_init_timers(struct sock *sk); 256 void nr_start_heartbeat(struct sock *); 257 void nr_start_t1timer(struct sock *); 258 void nr_start_t2timer(struct sock *); 259 void nr_start_t4timer(struct sock *); 260 void nr_start_idletimer(struct sock *); 261 void nr_stop_heartbeat(struct sock *); 262 void nr_stop_t1timer(struct sock *); 263 void nr_stop_t2timer(struct sock *); 264 void nr_stop_t4timer(struct sock *); 265 void nr_stop_idletimer(struct sock *); 266 int nr_t1timer_running(struct sock *); 267 268 /* sysctl_net_netrom.c */ 269 void nr_register_sysctl(void); 270 void nr_unregister_sysctl(void); 271 272 #endif 273