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