netrom.h (7895B)
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. */ 37enum { 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 66struct 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 88struct 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 102struct nr_route { 103 unsigned char quality; 104 unsigned char obs_count; 105 struct nr_neigh *neighbour; 106}; 107 108struct 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 126static __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 136static __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 */ 148static __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 154static __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 */ 176extern int sysctl_netrom_default_path_quality; 177extern int sysctl_netrom_obsolescence_count_initialiser; 178extern int sysctl_netrom_network_ttl_initialiser; 179extern int sysctl_netrom_transport_timeout; 180extern int sysctl_netrom_transport_maximum_tries; 181extern int sysctl_netrom_transport_acknowledge_delay; 182extern int sysctl_netrom_transport_busy_delay; 183extern int sysctl_netrom_transport_requested_window_size; 184extern int sysctl_netrom_transport_no_activity_timeout; 185extern int sysctl_netrom_routing_control; 186extern int sysctl_netrom_link_fails_count; 187extern int sysctl_netrom_reset_circuit; 188 189int nr_rx_frame(struct sk_buff *, struct net_device *); 190void nr_destroy_socket(struct sock *); 191 192/* nr_dev.c */ 193int nr_rx_ip(struct sk_buff *, struct net_device *); 194void nr_setup(struct net_device *); 195 196/* nr_in.c */ 197int nr_process_rx_frame(struct sock *, struct sk_buff *); 198 199/* nr_loopback.c */ 200void nr_loopback_init(void); 201void nr_loopback_clear(void); 202int nr_loopback_queue(struct sk_buff *); 203 204/* nr_out.c */ 205void nr_output(struct sock *, struct sk_buff *); 206void nr_send_nak_frame(struct sock *); 207void nr_kick(struct sock *); 208void nr_transmit_buffer(struct sock *, struct sk_buff *); 209void nr_establish_data_link(struct sock *); 210void nr_enquiry_response(struct sock *); 211void nr_check_iframes_acked(struct sock *, unsigned short); 212 213/* nr_route.c */ 214void nr_rt_device_down(struct net_device *); 215struct net_device *nr_dev_first(void); 216struct net_device *nr_dev_get(ax25_address *); 217int nr_rt_ioctl(unsigned int, void __user *); 218void nr_link_failed(ax25_cb *, int); 219int nr_route_frame(struct sk_buff *, ax25_cb *); 220extern const struct seq_operations nr_node_seqops; 221extern const struct seq_operations nr_neigh_seqops; 222void nr_rt_free(void); 223 224/* nr_subr.c */ 225void nr_clear_queues(struct sock *); 226void nr_frames_acked(struct sock *, unsigned short); 227void nr_requeue_frames(struct sock *); 228int nr_validate_nr(struct sock *, unsigned short); 229int nr_in_rx_window(struct sock *, unsigned short); 230void nr_write_internal(struct sock *, int); 231 232void __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) \ 239do { \ 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) \ 248do { \ 249 __nr_transmit_reply((skb), (mine), NR_RESET); \ 250} while (0) 251 252void nr_disconnect(struct sock *, int); 253 254/* nr_timer.c */ 255void nr_init_timers(struct sock *sk); 256void nr_start_heartbeat(struct sock *); 257void nr_start_t1timer(struct sock *); 258void nr_start_t2timer(struct sock *); 259void nr_start_t4timer(struct sock *); 260void nr_start_idletimer(struct sock *); 261void nr_stop_heartbeat(struct sock *); 262void nr_stop_t1timer(struct sock *); 263void nr_stop_t2timer(struct sock *); 264void nr_stop_t4timer(struct sock *); 265void nr_stop_idletimer(struct sock *); 266int nr_t1timer_running(struct sock *); 267 268/* sysctl_net_netrom.c */ 269int nr_register_sysctl(void); 270void nr_unregister_sysctl(void); 271 272#endif