/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Declarations of NET/ROM type objects.
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*
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* Jonathan Naylor G4KLX 9/4/95
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*/
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#ifndef _NETROM_H
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#define _NETROM_H
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#include <linux/netrom.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <linux/refcount.h>
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#include <linux/seq_file.h>
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#define NR_NETWORK_LEN 15
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#define NR_TRANSPORT_LEN 5
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#define NR_PROTO_IP 0x0C
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#define NR_PROTOEXT 0x00
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#define NR_CONNREQ 0x01
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#define NR_CONNACK 0x02
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#define NR_DISCREQ 0x03
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#define NR_DISCACK 0x04
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#define NR_INFO 0x05
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#define NR_INFOACK 0x06
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#define NR_RESET 0x07
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#define NR_CHOKE_FLAG 0x80
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#define NR_NAK_FLAG 0x40
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#define NR_MORE_FLAG 0x20
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/* Define Link State constants. */
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enum {
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NR_STATE_0,
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NR_STATE_1,
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NR_STATE_2,
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NR_STATE_3
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};
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#define NR_COND_ACK_PENDING 0x01
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#define NR_COND_REJECT 0x02
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#define NR_COND_PEER_RX_BUSY 0x04
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#define NR_COND_OWN_RX_BUSY 0x08
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#define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */
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#define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */
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#define NR_DEFAULT_N2 3 /* Number of Retries - 3 */
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#define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */
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#define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */
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#define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */
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#define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */
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#define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */
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#define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */
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#define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */
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#define NR_DEFAULT_FAILS 2 /* Link fails until route fails */
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#define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */
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#define NR_MODULUS 256
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#define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */
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#define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */
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struct nr_sock {
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struct sock sock;
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ax25_address user_addr, source_addr, dest_addr;
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struct net_device *device;
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unsigned char my_index, my_id;
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unsigned char your_index, your_id;
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unsigned char state, condition, bpqext, window;
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unsigned short vs, vr, va, vl;
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unsigned char n2, n2count;
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unsigned long t1, t2, t4, idle;
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unsigned short fraglen;
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struct timer_list t1timer;
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struct timer_list t2timer;
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struct timer_list t4timer;
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struct timer_list idletimer;
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struct sk_buff_head ack_queue;
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struct sk_buff_head reseq_queue;
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struct sk_buff_head frag_queue;
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};
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#define nr_sk(sk) ((struct nr_sock *)(sk))
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struct nr_neigh {
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struct hlist_node neigh_node;
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ax25_address callsign;
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ax25_digi *digipeat;
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ax25_cb *ax25;
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struct net_device *dev;
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unsigned char quality;
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unsigned char locked;
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unsigned short count;
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unsigned int number;
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unsigned char failed;
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refcount_t refcount;
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};
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struct nr_route {
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unsigned char quality;
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unsigned char obs_count;
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struct nr_neigh *neighbour;
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};
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struct nr_node {
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struct hlist_node node_node;
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ax25_address callsign;
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char mnemonic[7];
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unsigned char which;
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unsigned char count;
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struct nr_route routes[3];
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refcount_t refcount;
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spinlock_t node_lock;
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};
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/*********************************************************************
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* nr_node & nr_neigh lists, refcounting and locking
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*********************************************************************/
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#define nr_node_hold(__nr_node) \
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refcount_inc(&((__nr_node)->refcount))
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static __inline__ void nr_node_put(struct nr_node *nr_node)
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{
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if (refcount_dec_and_test(&nr_node->refcount)) {
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kfree(nr_node);
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}
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}
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#define nr_neigh_hold(__nr_neigh) \
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refcount_inc(&((__nr_neigh)->refcount))
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static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
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{
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if (refcount_dec_and_test(&nr_neigh->refcount)) {
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if (nr_neigh->ax25)
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ax25_cb_put(nr_neigh->ax25);
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kfree(nr_neigh->digipeat);
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kfree(nr_neigh);
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}
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}
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/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
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*/
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static __inline__ void nr_node_lock(struct nr_node *nr_node)
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{
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nr_node_hold(nr_node);
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spin_lock_bh(&nr_node->node_lock);
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}
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static __inline__ void nr_node_unlock(struct nr_node *nr_node)
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{
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spin_unlock_bh(&nr_node->node_lock);
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nr_node_put(nr_node);
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}
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#define nr_neigh_for_each(__nr_neigh, list) \
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hlist_for_each_entry(__nr_neigh, list, neigh_node)
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#define nr_neigh_for_each_safe(__nr_neigh, node2, list) \
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hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node)
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#define nr_node_for_each(__nr_node, list) \
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hlist_for_each_entry(__nr_node, list, node_node)
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#define nr_node_for_each_safe(__nr_node, node2, list) \
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hlist_for_each_entry_safe(__nr_node, node2, list, node_node)
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/*********************************************************************/
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/* af_netrom.c */
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extern int sysctl_netrom_default_path_quality;
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extern int sysctl_netrom_obsolescence_count_initialiser;
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extern int sysctl_netrom_network_ttl_initialiser;
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extern int sysctl_netrom_transport_timeout;
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extern int sysctl_netrom_transport_maximum_tries;
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extern int sysctl_netrom_transport_acknowledge_delay;
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extern int sysctl_netrom_transport_busy_delay;
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extern int sysctl_netrom_transport_requested_window_size;
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extern int sysctl_netrom_transport_no_activity_timeout;
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extern int sysctl_netrom_routing_control;
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extern int sysctl_netrom_link_fails_count;
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extern int sysctl_netrom_reset_circuit;
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int nr_rx_frame(struct sk_buff *, struct net_device *);
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void nr_destroy_socket(struct sock *);
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/* nr_dev.c */
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int nr_rx_ip(struct sk_buff *, struct net_device *);
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void nr_setup(struct net_device *);
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/* nr_in.c */
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int nr_process_rx_frame(struct sock *, struct sk_buff *);
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/* nr_loopback.c */
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void nr_loopback_init(void);
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void nr_loopback_clear(void);
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int nr_loopback_queue(struct sk_buff *);
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/* nr_out.c */
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void nr_output(struct sock *, struct sk_buff *);
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void nr_send_nak_frame(struct sock *);
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void nr_kick(struct sock *);
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void nr_transmit_buffer(struct sock *, struct sk_buff *);
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void nr_establish_data_link(struct sock *);
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void nr_enquiry_response(struct sock *);
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void nr_check_iframes_acked(struct sock *, unsigned short);
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/* nr_route.c */
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void nr_rt_device_down(struct net_device *);
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struct net_device *nr_dev_first(void);
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struct net_device *nr_dev_get(ax25_address *);
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int nr_rt_ioctl(unsigned int, void __user *);
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void nr_link_failed(ax25_cb *, int);
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int nr_route_frame(struct sk_buff *, ax25_cb *);
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extern const struct seq_operations nr_node_seqops;
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extern const struct seq_operations nr_neigh_seqops;
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void nr_rt_free(void);
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/* nr_subr.c */
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void nr_clear_queues(struct sock *);
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void nr_frames_acked(struct sock *, unsigned short);
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void nr_requeue_frames(struct sock *);
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int nr_validate_nr(struct sock *, unsigned short);
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int nr_in_rx_window(struct sock *, unsigned short);
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void nr_write_internal(struct sock *, int);
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void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags);
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/*
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* This routine is called when a Connect Acknowledge with the Choke Flag
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* set is needed to refuse a connection.
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*/
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#define nr_transmit_refusal(skb, mine) \
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do { \
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__nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
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} while (0)
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/*
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* This routine is called when we don't have a circuit matching an incoming
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* NET/ROM packet. This is an G8PZT Xrouter extension.
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*/
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#define nr_transmit_reset(skb, mine) \
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do { \
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__nr_transmit_reply((skb), (mine), NR_RESET); \
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} while (0)
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void nr_disconnect(struct sock *, int);
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/* nr_timer.c */
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void nr_init_timers(struct sock *sk);
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void nr_start_heartbeat(struct sock *);
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void nr_start_t1timer(struct sock *);
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void nr_start_t2timer(struct sock *);
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void nr_start_t4timer(struct sock *);
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void nr_start_idletimer(struct sock *);
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void nr_stop_heartbeat(struct sock *);
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void nr_stop_t1timer(struct sock *);
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void nr_stop_t2timer(struct sock *);
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void nr_stop_t4timer(struct sock *);
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void nr_stop_idletimer(struct sock *);
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int nr_t1timer_running(struct sock *);
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/* sysctl_net_netrom.c */
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int nr_register_sysctl(void);
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void nr_unregister_sysctl(void);
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#endif
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