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 | #include <net/ax25.h> |
18 | |
19 | #define NR_NETWORK_LEN 15 |
20 | #define NR_TRANSPORT_LEN 5 |
21 | |
22 | #define NR_PROTO_IP 0x0C |
23 | |
24 | #define NR_PROTOEXT 0x00 |
25 | #define NR_CONNREQ 0x01 |
26 | #define NR_CONNACK 0x02 |
27 | #define NR_DISCREQ 0x03 |
28 | #define NR_DISCACK 0x04 |
29 | #define NR_INFO 0x05 |
30 | #define NR_INFOACK 0x06 |
31 | #define NR_RESET 0x07 |
32 | |
33 | #define NR_CHOKE_FLAG 0x80 |
34 | #define NR_NAK_FLAG 0x40 |
35 | #define NR_MORE_FLAG 0x20 |
36 | |
37 | /* Define Link State constants. */ |
38 | enum { |
39 | NR_STATE_0, |
40 | NR_STATE_1, |
41 | NR_STATE_2, |
42 | NR_STATE_3 |
43 | }; |
44 | |
45 | #define NR_COND_ACK_PENDING 0x01 |
46 | #define NR_COND_REJECT 0x02 |
47 | #define NR_COND_PEER_RX_BUSY 0x04 |
48 | #define NR_COND_OWN_RX_BUSY 0x08 |
49 | |
50 | #define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */ |
51 | #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ |
52 | #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ |
53 | #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ |
54 | #define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */ |
55 | #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ |
56 | #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ |
57 | #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ |
58 | #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ |
59 | #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ |
60 | #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ |
61 | #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ |
62 | |
63 | #define NR_MODULUS 256 |
64 | #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ |
65 | #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ |
66 | |
67 | struct nr_sock { |
68 | struct sock sock; |
69 | ax25_address user_addr, source_addr, dest_addr; |
70 | struct net_device *device; |
71 | unsigned char my_index, my_id; |
72 | unsigned char your_index, your_id; |
73 | unsigned char state, condition, bpqext, window; |
74 | unsigned short vs, vr, va, vl; |
75 | unsigned char n2, n2count; |
76 | unsigned long t1, t2, t4, idle; |
77 | unsigned short fraglen; |
78 | struct timer_list t1timer; |
79 | struct timer_list t2timer; |
80 | struct timer_list t4timer; |
81 | struct timer_list idletimer; |
82 | struct sk_buff_head ack_queue; |
83 | struct sk_buff_head reseq_queue; |
84 | struct sk_buff_head frag_queue; |
85 | }; |
86 | |
87 | #define nr_sk(sk) ((struct nr_sock *)(sk)) |
88 | |
89 | struct nr_neigh { |
90 | struct hlist_node neigh_node; |
91 | ax25_address callsign; |
92 | ax25_digi *digipeat; |
93 | ax25_cb *ax25; |
94 | struct net_device *dev; |
95 | unsigned char quality; |
96 | unsigned char locked; |
97 | unsigned short count; |
98 | unsigned int number; |
99 | unsigned char failed; |
100 | refcount_t refcount; |
101 | }; |
102 | |
103 | struct nr_route { |
104 | unsigned char quality; |
105 | unsigned char obs_count; |
106 | struct nr_neigh *neighbour; |
107 | }; |
108 | |
109 | struct nr_node { |
110 | struct hlist_node node_node; |
111 | ax25_address callsign; |
112 | char mnemonic[7]; |
113 | unsigned char which; |
114 | unsigned char count; |
115 | struct nr_route routes[3]; |
116 | refcount_t refcount; |
117 | spinlock_t node_lock; |
118 | }; |
119 | |
120 | /********************************************************************* |
121 | * nr_node & nr_neigh lists, refcounting and locking |
122 | *********************************************************************/ |
123 | |
124 | #define nr_node_hold(__nr_node) \ |
125 | refcount_inc(&((__nr_node)->refcount)) |
126 | |
127 | static __inline__ void nr_node_put(struct nr_node *nr_node) |
128 | { |
129 | if (refcount_dec_and_test(r: &nr_node->refcount)) { |
130 | kfree(objp: nr_node); |
131 | } |
132 | } |
133 | |
134 | #define nr_neigh_hold(__nr_neigh) \ |
135 | refcount_inc(&((__nr_neigh)->refcount)) |
136 | |
137 | static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) |
138 | { |
139 | if (refcount_dec_and_test(r: &nr_neigh->refcount)) { |
140 | if (nr_neigh->ax25) |
141 | ax25_cb_put(ax25: nr_neigh->ax25); |
142 | kfree(objp: nr_neigh->digipeat); |
143 | kfree(objp: nr_neigh); |
144 | } |
145 | } |
146 | |
147 | /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. |
148 | */ |
149 | static __inline__ void nr_node_lock(struct nr_node *nr_node) |
150 | { |
151 | nr_node_hold(nr_node); |
152 | spin_lock_bh(lock: &nr_node->node_lock); |
153 | } |
154 | |
155 | static __inline__ void nr_node_unlock(struct nr_node *nr_node) |
156 | { |
157 | spin_unlock_bh(lock: &nr_node->node_lock); |
158 | nr_node_put(nr_node); |
159 | } |
160 | |
161 | #define nr_neigh_for_each(__nr_neigh, list) \ |
162 | hlist_for_each_entry(__nr_neigh, list, neigh_node) |
163 | |
164 | #define nr_neigh_for_each_safe(__nr_neigh, node2, list) \ |
165 | hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node) |
166 | |
167 | #define nr_node_for_each(__nr_node, list) \ |
168 | hlist_for_each_entry(__nr_node, list, node_node) |
169 | |
170 | #define nr_node_for_each_safe(__nr_node, node2, list) \ |
171 | hlist_for_each_entry_safe(__nr_node, node2, list, node_node) |
172 | |
173 | |
174 | /*********************************************************************/ |
175 | |
176 | /* af_netrom.c */ |
177 | extern int sysctl_netrom_default_path_quality; |
178 | extern int sysctl_netrom_obsolescence_count_initialiser; |
179 | extern int sysctl_netrom_network_ttl_initialiser; |
180 | extern int sysctl_netrom_transport_timeout; |
181 | extern int sysctl_netrom_transport_maximum_tries; |
182 | extern int sysctl_netrom_transport_acknowledge_delay; |
183 | extern int sysctl_netrom_transport_busy_delay; |
184 | extern int sysctl_netrom_transport_requested_window_size; |
185 | extern int sysctl_netrom_transport_no_activity_timeout; |
186 | extern int sysctl_netrom_routing_control; |
187 | extern int sysctl_netrom_link_fails_count; |
188 | extern int sysctl_netrom_reset_circuit; |
189 | |
190 | int nr_rx_frame(struct sk_buff *, struct net_device *); |
191 | void nr_destroy_socket(struct sock *); |
192 | |
193 | /* nr_dev.c */ |
194 | int nr_rx_ip(struct sk_buff *, struct net_device *); |
195 | void nr_setup(struct net_device *); |
196 | |
197 | /* nr_in.c */ |
198 | int nr_process_rx_frame(struct sock *, struct sk_buff *); |
199 | |
200 | /* nr_loopback.c */ |
201 | void nr_loopback_init(void); |
202 | void nr_loopback_clear(void); |
203 | int nr_loopback_queue(struct sk_buff *); |
204 | |
205 | /* nr_out.c */ |
206 | void nr_output(struct sock *, struct sk_buff *); |
207 | void nr_send_nak_frame(struct sock *); |
208 | void nr_kick(struct sock *); |
209 | void nr_transmit_buffer(struct sock *, struct sk_buff *); |
210 | void nr_establish_data_link(struct sock *); |
211 | void nr_enquiry_response(struct sock *); |
212 | void nr_check_iframes_acked(struct sock *, unsigned short); |
213 | |
214 | /* nr_route.c */ |
215 | void nr_rt_device_down(struct net_device *); |
216 | struct net_device *nr_dev_first(void); |
217 | struct net_device *nr_dev_get(ax25_address *); |
218 | int nr_rt_ioctl(unsigned int, void __user *); |
219 | void nr_link_failed(ax25_cb *, int); |
220 | int nr_route_frame(struct sk_buff *, ax25_cb *); |
221 | extern const struct seq_operations nr_node_seqops; |
222 | extern const struct seq_operations nr_neigh_seqops; |
223 | void nr_rt_free(void); |
224 | |
225 | /* nr_subr.c */ |
226 | void nr_clear_queues(struct sock *); |
227 | void nr_frames_acked(struct sock *, unsigned short); |
228 | void nr_requeue_frames(struct sock *); |
229 | int nr_validate_nr(struct sock *, unsigned short); |
230 | int nr_in_rx_window(struct sock *, unsigned short); |
231 | void nr_write_internal(struct sock *, int); |
232 | |
233 | void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags); |
234 | |
235 | /* |
236 | * This routine is called when a Connect Acknowledge with the Choke Flag |
237 | * set is needed to refuse a connection. |
238 | */ |
239 | #define nr_transmit_refusal(skb, mine) \ |
240 | do { \ |
241 | __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ |
242 | } while (0) |
243 | |
244 | /* |
245 | * This routine is called when we don't have a circuit matching an incoming |
246 | * NET/ROM packet. This is an G8PZT Xrouter extension. |
247 | */ |
248 | #define nr_transmit_reset(skb, mine) \ |
249 | do { \ |
250 | __nr_transmit_reply((skb), (mine), NR_RESET); \ |
251 | } while (0) |
252 | |
253 | void nr_disconnect(struct sock *, int); |
254 | |
255 | /* nr_timer.c */ |
256 | void nr_init_timers(struct sock *sk); |
257 | void nr_start_heartbeat(struct sock *); |
258 | void nr_start_t1timer(struct sock *); |
259 | void nr_start_t2timer(struct sock *); |
260 | void nr_start_t4timer(struct sock *); |
261 | void nr_start_idletimer(struct sock *); |
262 | void nr_stop_heartbeat(struct sock *); |
263 | void nr_stop_t1timer(struct sock *); |
264 | void nr_stop_t2timer(struct sock *); |
265 | void nr_stop_t4timer(struct sock *); |
266 | void nr_stop_idletimer(struct sock *); |
267 | int nr_t1timer_running(struct sock *); |
268 | |
269 | /* sysctl_net_netrom.c */ |
270 | int nr_register_sysctl(void); |
271 | void nr_unregister_sysctl(void); |
272 | |
273 | #endif |
274 | |