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TOMOYO Linux Cross Reference
Linux/include/net/netrom.h

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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, node, list) \
158         hlist_for_each_entry(__nr_neigh, node, list, neigh_node)
159 
160 #define nr_neigh_for_each_safe(__nr_neigh, node, node2, list) \
161         hlist_for_each_entry_safe(__nr_neigh, node, node2, list, neigh_node)
162 
163 #define nr_node_for_each(__nr_node, node, list) \
164         hlist_for_each_entry(__nr_node, node, list, node_node)
165 
166 #define nr_node_for_each_safe(__nr_node, node, node2, list) \
167         hlist_for_each_entry_safe(__nr_node, 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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