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Linux kernel mirror (for testing)
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linux
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 <net/sock.h>
13
14#define NR_NETWORK_LEN 15
15#define NR_TRANSPORT_LEN 5
16
17#define NR_PROTO_IP 0x0C
18
19#define NR_PROTOEXT 0x00
20#define NR_CONNREQ 0x01
21#define NR_CONNACK 0x02
22#define NR_DISCREQ 0x03
23#define NR_DISCACK 0x04
24#define NR_INFO 0x05
25#define NR_INFOACK 0x06
26#define NR_RESET 0x07
27
28#define NR_CHOKE_FLAG 0x80
29#define NR_NAK_FLAG 0x40
30#define NR_MORE_FLAG 0x20
31
32/* Define Link State constants. */
33enum {
34 NR_STATE_0,
35 NR_STATE_1,
36 NR_STATE_2,
37 NR_STATE_3
38};
39
40#define NR_COND_ACK_PENDING 0x01
41#define NR_COND_REJECT 0x02
42#define NR_COND_PEER_RX_BUSY 0x04
43#define NR_COND_OWN_RX_BUSY 0x08
44
45#define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */
46#define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */
47#define NR_DEFAULT_N2 3 /* Number of Retries - 3 */
48#define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */
49#define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */
50#define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */
51#define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */
52#define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */
53#define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */
54#define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */
55#define NR_DEFAULT_FAILS 2 /* Link fails until route fails */
56#define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */
57
58#define NR_MODULUS 256
59#define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */
60#define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */
61
62struct nr_sock {
63 struct sock sock;
64 ax25_address user_addr, source_addr, dest_addr;
65 struct net_device *device;
66 unsigned char my_index, my_id;
67 unsigned char your_index, your_id;
68 unsigned char state, condition, bpqext, window;
69 unsigned short vs, vr, va, vl;
70 unsigned char n2, n2count;
71 unsigned long t1, t2, t4, idle;
72 unsigned short fraglen;
73 struct timer_list t1timer;
74 struct timer_list t2timer;
75 struct timer_list t4timer;
76 struct timer_list idletimer;
77 struct sk_buff_head ack_queue;
78 struct sk_buff_head reseq_queue;
79 struct sk_buff_head frag_queue;
80};
81
82#define nr_sk(sk) ((struct nr_sock *)(sk))
83
84struct nr_neigh {
85 struct hlist_node neigh_node;
86 ax25_address callsign;
87 ax25_digi *digipeat;
88 ax25_cb *ax25;
89 struct net_device *dev;
90 unsigned char quality;
91 unsigned char locked;
92 unsigned short count;
93 unsigned int number;
94 unsigned char failed;
95 atomic_t refcount;
96};
97
98struct nr_route {
99 unsigned char quality;
100 unsigned char obs_count;
101 struct nr_neigh *neighbour;
102};
103
104struct nr_node {
105 struct hlist_node node_node;
106 ax25_address callsign;
107 char mnemonic[7];
108 unsigned char which;
109 unsigned char count;
110 struct nr_route routes[3];
111 atomic_t refcount;
112 spinlock_t node_lock;
113};
114
115/*********************************************************************
116 * nr_node & nr_neigh lists, refcounting and locking
117 *********************************************************************/
118
119#define nr_node_hold(__nr_node) \
120 atomic_inc(&((__nr_node)->refcount))
121
122static __inline__ void nr_node_put(struct nr_node *nr_node)
123{
124 if (atomic_dec_and_test(&nr_node->refcount)) {
125 kfree(nr_node);
126 }
127}
128
129#define nr_neigh_hold(__nr_neigh) \
130 atomic_inc(&((__nr_neigh)->refcount))
131
132static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
133{
134 if (atomic_dec_and_test(&nr_neigh->refcount)) {
135 if (nr_neigh->ax25)
136 ax25_cb_put(nr_neigh->ax25);
137 kfree(nr_neigh->digipeat);
138 kfree(nr_neigh);
139 }
140}
141
142/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
143 */
144static __inline__ void nr_node_lock(struct nr_node *nr_node)
145{
146 nr_node_hold(nr_node);
147 spin_lock_bh(&nr_node->node_lock);
148}
149
150static __inline__ void nr_node_unlock(struct nr_node *nr_node)
151{
152 spin_unlock_bh(&nr_node->node_lock);
153 nr_node_put(nr_node);
154}
155
156#define nr_neigh_for_each(__nr_neigh, node, list) \
157 hlist_for_each_entry(__nr_neigh, node, list, neigh_node)
158
159#define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \
160 hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node)
161
162#define nr_node_for_each(__nr_node, node, list) \
163 hlist_for_each_entry(__nr_node, node, list, node_node)
164
165#define nr_node_for_each_safe(__nr_node, node, node2, list) \
166 hlist_for_each_entry_safe(__nr_node, node, node2, list, node_node)
167
168
169/*********************************************************************/
170
171/* af_netrom.c */
172extern int sysctl_netrom_default_path_quality;
173extern int sysctl_netrom_obsolescence_count_initialiser;
174extern int sysctl_netrom_network_ttl_initialiser;
175extern int sysctl_netrom_transport_timeout;
176extern int sysctl_netrom_transport_maximum_tries;
177extern int sysctl_netrom_transport_acknowledge_delay;
178extern int sysctl_netrom_transport_busy_delay;
179extern int sysctl_netrom_transport_requested_window_size;
180extern int sysctl_netrom_transport_no_activity_timeout;
181extern int sysctl_netrom_routing_control;
182extern int sysctl_netrom_link_fails_count;
183extern int sysctl_netrom_reset_circuit;
184
185extern int nr_rx_frame(struct sk_buff *, struct net_device *);
186extern void nr_destroy_socket(struct sock *);
187
188/* nr_dev.c */
189extern int nr_rx_ip(struct sk_buff *, struct net_device *);
190extern void nr_setup(struct net_device *);
191
192/* nr_in.c */
193extern int nr_process_rx_frame(struct sock *, struct sk_buff *);
194
195/* nr_loopback.c */
196extern void nr_loopback_init(void);
197extern void nr_loopback_clear(void);
198extern int nr_loopback_queue(struct sk_buff *);
199
200/* nr_out.c */
201extern void nr_output(struct sock *, struct sk_buff *);
202extern void nr_send_nak_frame(struct sock *);
203extern void nr_kick(struct sock *);
204extern void nr_transmit_buffer(struct sock *, struct sk_buff *);
205extern void nr_establish_data_link(struct sock *);
206extern void nr_enquiry_response(struct sock *);
207extern void nr_check_iframes_acked(struct sock *, unsigned short);
208
209/* nr_route.c */
210extern void nr_rt_device_down(struct net_device *);
211extern struct net_device *nr_dev_first(void);
212extern struct net_device *nr_dev_get(ax25_address *);
213extern int nr_rt_ioctl(unsigned int, void __user *);
214extern void nr_link_failed(ax25_cb *, int);
215extern int nr_route_frame(struct sk_buff *, ax25_cb *);
216extern const struct file_operations nr_nodes_fops;
217extern const struct file_operations nr_neigh_fops;
218extern void nr_rt_free(void);
219
220/* nr_subr.c */
221extern void nr_clear_queues(struct sock *);
222extern void nr_frames_acked(struct sock *, unsigned short);
223extern void nr_requeue_frames(struct sock *);
224extern int nr_validate_nr(struct sock *, unsigned short);
225extern int nr_in_rx_window(struct sock *, unsigned short);
226extern void nr_write_internal(struct sock *, int);
227
228extern void __nr_transmit_reply(struct sk_buff *skb, int mine,
229 unsigned char cmdflags);
230
231/*
232 * This routine is called when a Connect Acknowledge with the Choke Flag
233 * set is needed to refuse a connection.
234 */
235#define nr_transmit_refusal(skb, mine) \
236do { \
237 __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
238} while (0)
239
240/*
241 * This routine is called when we don't have a circuit matching an incoming
242 * NET/ROM packet. This is an G8PZT Xrouter extension.
243 */
244#define nr_transmit_reset(skb, mine) \
245do { \
246 __nr_transmit_reply((skb), (mine), NR_RESET); \
247} while (0)
248
249extern void nr_disconnect(struct sock *, int);
250
251/* nr_timer.c */
252extern void nr_init_timers(struct sock *sk);
253extern void nr_start_heartbeat(struct sock *);
254extern void nr_start_t1timer(struct sock *);
255extern void nr_start_t2timer(struct sock *);
256extern void nr_start_t4timer(struct sock *);
257extern void nr_start_idletimer(struct sock *);
258extern void nr_stop_heartbeat(struct sock *);
259extern void nr_stop_t1timer(struct sock *);
260extern void nr_stop_t2timer(struct sock *);
261extern void nr_stop_t4timer(struct sock *);
262extern void nr_stop_idletimer(struct sock *);
263extern int nr_t1timer_running(struct sock *);
264
265/* sysctl_net_netrom.c */
266extern void nr_register_sysctl(void);
267extern void nr_unregister_sysctl(void);
268
269#endif