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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | |
b88a762b | 10 | |
1da177e4 LT |
11 | #include <linux/netrom.h> |
12 | #include <linux/list.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
1da177e4 | 14 | #include <net/sock.h> |
af420749 | 15 | #include <linux/refcount.h> |
1da177e4 LT |
16 | |
17 | #define NR_NETWORK_LEN 15 | |
18 | #define NR_TRANSPORT_LEN 5 | |
19 | ||
20 | #define NR_PROTO_IP 0x0C | |
21 | ||
22 | #define NR_PROTOEXT 0x00 | |
23 | #define NR_CONNREQ 0x01 | |
24 | #define NR_CONNACK 0x02 | |
25 | #define NR_DISCREQ 0x03 | |
26 | #define NR_DISCACK 0x04 | |
27 | #define NR_INFO 0x05 | |
28 | #define NR_INFOACK 0x06 | |
e21ce8c7 | 29 | #define NR_RESET 0x07 |
1da177e4 LT |
30 | |
31 | #define NR_CHOKE_FLAG 0x80 | |
32 | #define NR_NAK_FLAG 0x40 | |
33 | #define NR_MORE_FLAG 0x20 | |
34 | ||
35 | /* Define Link State constants. */ | |
36 | enum { | |
37 | NR_STATE_0, | |
38 | NR_STATE_1, | |
39 | NR_STATE_2, | |
40 | NR_STATE_3 | |
41 | }; | |
42 | ||
43 | #define NR_COND_ACK_PENDING 0x01 | |
44 | #define NR_COND_REJECT 0x02 | |
45 | #define NR_COND_PEER_RX_BUSY 0x04 | |
46 | #define NR_COND_OWN_RX_BUSY 0x08 | |
47 | ||
4d8937d0 RB |
48 | #define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */ |
49 | #define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */ | |
1da177e4 | 50 | #define NR_DEFAULT_N2 3 /* Number of Retries - 3 */ |
4d8937d0 RB |
51 | #define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */ |
52 | #define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */ | |
1da177e4 LT |
53 | #define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */ |
54 | #define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */ | |
55 | #define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */ | |
56 | #define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */ | |
57 | #define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */ | |
58 | #define NR_DEFAULT_FAILS 2 /* Link fails until route fails */ | |
e21ce8c7 | 59 | #define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */ |
1da177e4 LT |
60 | |
61 | #define NR_MODULUS 256 | |
62 | #define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */ | |
63 | #define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */ | |
64 | ||
65 | struct nr_sock { | |
66 | struct sock sock; | |
67 | ax25_address user_addr, source_addr, dest_addr; | |
68 | struct net_device *device; | |
69 | unsigned char my_index, my_id; | |
70 | unsigned char your_index, your_id; | |
71 | unsigned char state, condition, bpqext, window; | |
72 | unsigned short vs, vr, va, vl; | |
73 | unsigned char n2, n2count; | |
74 | unsigned long t1, t2, t4, idle; | |
75 | unsigned short fraglen; | |
76 | struct timer_list t1timer; | |
77 | struct timer_list t2timer; | |
78 | struct timer_list t4timer; | |
79 | struct timer_list idletimer; | |
80 | struct sk_buff_head ack_queue; | |
81 | struct sk_buff_head reseq_queue; | |
82 | struct sk_buff_head frag_queue; | |
83 | }; | |
84 | ||
85 | #define nr_sk(sk) ((struct nr_sock *)(sk)) | |
86 | ||
87 | struct nr_neigh { | |
88 | struct hlist_node neigh_node; | |
89 | ax25_address callsign; | |
90 | ax25_digi *digipeat; | |
91 | ax25_cb *ax25; | |
92 | struct net_device *dev; | |
93 | unsigned char quality; | |
94 | unsigned char locked; | |
95 | unsigned short count; | |
96 | unsigned int number; | |
97 | unsigned char failed; | |
af420749 | 98 | refcount_t refcount; |
1da177e4 LT |
99 | }; |
100 | ||
101 | struct nr_route { | |
102 | unsigned char quality; | |
103 | unsigned char obs_count; | |
104 | struct nr_neigh *neighbour; | |
105 | }; | |
106 | ||
107 | struct nr_node { | |
108 | struct hlist_node node_node; | |
109 | ax25_address callsign; | |
110 | char mnemonic[7]; | |
111 | unsigned char which; | |
112 | unsigned char count; | |
113 | struct nr_route routes[3]; | |
156be7ed | 114 | refcount_t refcount; |
1da177e4 LT |
115 | spinlock_t node_lock; |
116 | }; | |
117 | ||
118 | /********************************************************************* | |
119 | * nr_node & nr_neigh lists, refcounting and locking | |
120 | *********************************************************************/ | |
121 | ||
122 | #define nr_node_hold(__nr_node) \ | |
156be7ed | 123 | refcount_inc(&((__nr_node)->refcount)) |
1da177e4 LT |
124 | |
125 | static __inline__ void nr_node_put(struct nr_node *nr_node) | |
126 | { | |
156be7ed | 127 | if (refcount_dec_and_test(&nr_node->refcount)) { |
1da177e4 LT |
128 | kfree(nr_node); |
129 | } | |
130 | } | |
131 | ||
132 | #define nr_neigh_hold(__nr_neigh) \ | |
af420749 | 133 | refcount_inc(&((__nr_neigh)->refcount)) |
1da177e4 LT |
134 | |
135 | static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh) | |
136 | { | |
af420749 | 137 | if (refcount_dec_and_test(&nr_neigh->refcount)) { |
d00c362f JP |
138 | if (nr_neigh->ax25) |
139 | ax25_cb_put(nr_neigh->ax25); | |
b4558ea9 | 140 | kfree(nr_neigh->digipeat); |
1da177e4 LT |
141 | kfree(nr_neigh); |
142 | } | |
143 | } | |
144 | ||
145 | /* nr_node_lock and nr_node_unlock also hold/put the node's refcounter. | |
146 | */ | |
147 | static __inline__ void nr_node_lock(struct nr_node *nr_node) | |
148 | { | |
149 | nr_node_hold(nr_node); | |
150 | spin_lock_bh(&nr_node->node_lock); | |
151 | } | |
152 | ||
153 | static __inline__ void nr_node_unlock(struct nr_node *nr_node) | |
154 | { | |
155 | spin_unlock_bh(&nr_node->node_lock); | |
156 | nr_node_put(nr_node); | |
157 | } | |
158 | ||
b67bfe0d SL |
159 | #define nr_neigh_for_each(__nr_neigh, list) \ |
160 | hlist_for_each_entry(__nr_neigh, list, neigh_node) | |
1da177e4 | 161 | |
b67bfe0d SL |
162 | #define nr_neigh_for_each_safe(__nr_neigh, node2, list) \ |
163 | hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node) | |
1da177e4 | 164 | |
b67bfe0d SL |
165 | #define nr_node_for_each(__nr_node, list) \ |
166 | hlist_for_each_entry(__nr_node, list, node_node) | |
1da177e4 | 167 | |
b67bfe0d SL |
168 | #define nr_node_for_each_safe(__nr_node, node2, list) \ |
169 | hlist_for_each_entry_safe(__nr_node, node2, list, node_node) | |
1da177e4 LT |
170 | |
171 | ||
172 | /*********************************************************************/ | |
173 | ||
174 | /* af_netrom.c */ | |
175 | extern int sysctl_netrom_default_path_quality; | |
176 | extern int sysctl_netrom_obsolescence_count_initialiser; | |
177 | extern int sysctl_netrom_network_ttl_initialiser; | |
178 | extern int sysctl_netrom_transport_timeout; | |
179 | extern int sysctl_netrom_transport_maximum_tries; | |
180 | extern int sysctl_netrom_transport_acknowledge_delay; | |
181 | extern int sysctl_netrom_transport_busy_delay; | |
182 | extern int sysctl_netrom_transport_requested_window_size; | |
183 | extern int sysctl_netrom_transport_no_activity_timeout; | |
184 | extern int sysctl_netrom_routing_control; | |
185 | extern int sysctl_netrom_link_fails_count; | |
e21ce8c7 RB |
186 | extern int sysctl_netrom_reset_circuit; |
187 | ||
96496127 JP |
188 | int nr_rx_frame(struct sk_buff *, struct net_device *); |
189 | void nr_destroy_socket(struct sock *); | |
1da177e4 LT |
190 | |
191 | /* nr_dev.c */ | |
96496127 JP |
192 | int nr_rx_ip(struct sk_buff *, struct net_device *); |
193 | void nr_setup(struct net_device *); | |
1da177e4 LT |
194 | |
195 | /* nr_in.c */ | |
96496127 | 196 | int nr_process_rx_frame(struct sock *, struct sk_buff *); |
1da177e4 LT |
197 | |
198 | /* nr_loopback.c */ | |
96496127 JP |
199 | void nr_loopback_init(void); |
200 | void nr_loopback_clear(void); | |
201 | int nr_loopback_queue(struct sk_buff *); | |
1da177e4 LT |
202 | |
203 | /* nr_out.c */ | |
96496127 JP |
204 | void nr_output(struct sock *, struct sk_buff *); |
205 | void nr_send_nak_frame(struct sock *); | |
206 | void nr_kick(struct sock *); | |
207 | void nr_transmit_buffer(struct sock *, struct sk_buff *); | |
208 | void nr_establish_data_link(struct sock *); | |
209 | void nr_enquiry_response(struct sock *); | |
210 | void nr_check_iframes_acked(struct sock *, unsigned short); | |
1da177e4 LT |
211 | |
212 | /* nr_route.c */ | |
96496127 JP |
213 | void nr_rt_device_down(struct net_device *); |
214 | struct net_device *nr_dev_first(void); | |
215 | struct net_device *nr_dev_get(ax25_address *); | |
216 | int nr_rt_ioctl(unsigned int, void __user *); | |
217 | void nr_link_failed(ax25_cb *, int); | |
218 | int nr_route_frame(struct sk_buff *, ax25_cb *); | |
54047320 AV |
219 | extern const struct file_operations nr_nodes_fops; |
220 | extern const struct file_operations nr_neigh_fops; | |
96496127 | 221 | void nr_rt_free(void); |
1da177e4 LT |
222 | |
223 | /* nr_subr.c */ | |
96496127 JP |
224 | void nr_clear_queues(struct sock *); |
225 | void nr_frames_acked(struct sock *, unsigned short); | |
226 | void nr_requeue_frames(struct sock *); | |
227 | int nr_validate_nr(struct sock *, unsigned short); | |
228 | int nr_in_rx_window(struct sock *, unsigned short); | |
229 | void nr_write_internal(struct sock *, int); | |
e21ce8c7 | 230 | |
96496127 | 231 | void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags); |
e21ce8c7 RB |
232 | |
233 | /* | |
234 | * This routine is called when a Connect Acknowledge with the Choke Flag | |
235 | * set is needed to refuse a connection. | |
236 | */ | |
237 | #define nr_transmit_refusal(skb, mine) \ | |
238 | do { \ | |
239 | __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \ | |
240 | } while (0) | |
241 | ||
242 | /* | |
243 | * This routine is called when we don't have a circuit matching an incoming | |
244 | * NET/ROM packet. This is an G8PZT Xrouter extension. | |
245 | */ | |
246 | #define nr_transmit_reset(skb, mine) \ | |
247 | do { \ | |
248 | __nr_transmit_reply((skb), (mine), NR_RESET); \ | |
249 | } while (0) | |
250 | ||
96496127 | 251 | void nr_disconnect(struct sock *, int); |
1da177e4 LT |
252 | |
253 | /* nr_timer.c */ | |
96496127 JP |
254 | void nr_init_timers(struct sock *sk); |
255 | void nr_start_heartbeat(struct sock *); | |
256 | void nr_start_t1timer(struct sock *); | |
257 | void nr_start_t2timer(struct sock *); | |
258 | void nr_start_t4timer(struct sock *); | |
259 | void nr_start_idletimer(struct sock *); | |
260 | void nr_stop_heartbeat(struct sock *); | |
261 | void nr_stop_t1timer(struct sock *); | |
262 | void nr_stop_t2timer(struct sock *); | |
263 | void nr_stop_t4timer(struct sock *); | |
264 | void nr_stop_idletimer(struct sock *); | |
265 | int nr_t1timer_running(struct sock *); | |
1da177e4 LT |
266 | |
267 | /* sysctl_net_netrom.c */ | |
96496127 JP |
268 | void nr_register_sysctl(void); |
269 | void nr_unregister_sysctl(void); | |
1da177e4 LT |
270 | |
271 | #endif |