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1.1 root 1: /*
2: * Declarations of AX.25 type objects.
3: *
4: * Alan Cox (GW4PTS) 10/11/93
5: */
6:
7: #ifndef _AX25_H
8: #define _AX25_H
9: #include <linux/ax25.h>
10:
11: #define AX25_SLOWHZ 10 /* Run timing at 1/10 second - gives us better resolution for 56kbit links */
12:
13: #define AX25_T1CLAMPLO (1 * AX25_SLOWHZ) /* If defined, clamp at 1 second **/
14: #define AX25_T1CLAMPHI (30 * AX25_SLOWHZ) /* If defined, clamp at 30 seconds **/
15:
16: #define AX25_BPQ_HEADER_LEN 16
17: #define AX25_KISS_HEADER_LEN 1
18:
19: #define AX25_HEADER_LEN 17
20: #define AX25_ADDR_LEN 7
21: #define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN)
22: #define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
23:
24: /* AX.25 Protocol IDs */
25: #define AX25_P_ROSE 0x01
26: #define AX25_P_IP 0xCC
27: #define AX25_P_ARP 0xCD
28: #define AX25_P_TEXT 0xF0
29: #define AX25_P_NETROM 0xCF
30: #define AX25_P_SEGMENT 0x08
31:
32: /* AX.25 Segment control values */
33: #define AX25_SEG_REM 0x7F
34: #define AX25_SEG_FIRST 0x80
35:
36: #define AX25_CBIT 0x80 /* Command/Response bit */
37: #define AX25_EBIT 0x01 /* HDLC Address Extension bit */
38: #define AX25_HBIT 0x80 /* Has been repeated bit */
39:
40: #define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */
41: #define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */
42: #define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */
43:
44: #define AX25_COND_ACK_PENDING 0x01
45: #define AX25_COND_REJECT 0x02
46: #define AX25_COND_PEER_RX_BUSY 0x04
47: #define AX25_COND_OWN_RX_BUSY 0x08
48:
49: #ifndef _LINUX_NETDEVICE_H
50: #include <linux/netdevice.h>
51: #endif
52:
53: /*
54: * These headers are taken from the KA9Q package by Phil Karn. These specific
55: * files have been placed under the GPL (not the whole package) by Phil.
56: *
57: *
58: * Copyright 1991 Phil Karn, KA9Q
59: *
60: * This program is free software; you can redistribute it and/or modify
61: * it under the terms of the GNU General Public License as published by
62: * the Free Software Foundation; version 2 dated June, 1991.
63: *
64: * This program is distributed in the hope that it will be useful,
65: * but WITHOUT ANY WARRANTY; without even the implied warranty of
66: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
67: * GNU General Public License for more details.
68: *
69: * You should have received a copy of the GNU General Public License
70: * along with this program; if not, write to the Free Software
71: * Foundation, Inc., 675 Mass Ave., Cambridge, MA 02139, USA.
72: */
73:
74: /* Upper sub-layer (LAPB) definitions */
75:
76: /* Control field templates */
77: #define AX25_I 0x00 /* Information frames */
78: #define AX25_S 0x01 /* Supervisory frames */
79: #define AX25_RR 0x01 /* Receiver ready */
80: #define AX25_RNR 0x05 /* Receiver not ready */
81: #define AX25_REJ 0x09 /* Reject */
82: #define AX25_U 0x03 /* Unnumbered frames */
83: #define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */
84: #define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */
85: #define AX25_DISC 0x43 /* Disconnect */
86: #define AX25_DM 0x0f /* Disconnected mode */
87: #define AX25_UA 0x63 /* Unnumbered acknowledge */
88: #define AX25_FRMR 0x87 /* Frame reject */
89: #define AX25_UI 0x03 /* Unnumbered information */
90:
91: #define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
92: #define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
93:
94: #define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
95:
96: #define AX25_POLLOFF 0
97: #define AX25_POLLON 1
98:
99: /* AX25 L2 C-bit */
100: #define AX25_COMMAND 1
101: #define AX25_RESPONSE 2
102:
103: /* Define Link State constants. */
104:
105: enum {
106: AX25_STATE_0,
107: AX25_STATE_1,
108: AX25_STATE_2,
109: AX25_STATE_3,
110: AX25_STATE_4
111: };
112:
113: #define AX25_MAX_DEVICES 20 /* Max No of AX.25 devices */
114:
115: #define AX25_MODULUS 8 /* Standard AX.25 modulus */
116: #define AX25_EMODULUS 128 /* Extended AX.25 modulus */
117:
118: enum {
119: AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
120: AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
121: AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
122: AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
123: AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
124: AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
125: AX25_VALUES_T1, /* Default T1 timeout value */
126: AX25_VALUES_T2, /* Default T2 timeout value */
127: AX25_VALUES_T3, /* Default T3 timeout value */
128: AX25_VALUES_IDLE, /* Connected mode idle timer */
129: AX25_VALUES_N2, /* Default N2 value */
130: AX25_VALUES_PACLEN, /* AX.25 MTU */
131: AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
132: };
133:
134: #define AX25_DEF_IPDEFMODE 0 /* Datagram */
135: #define AX25_DEF_AXDEFMODE 0 /* Normal */
136: #define AX25_DEF_BACKOFF 1 /* Linear backoff */
137: #define AX25_DEF_CONMODE 2 /* Connected mode allowed */
138: #define AX25_DEF_WINDOW 2 /* Window=2 */
139: #define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
140: #define AX25_DEF_T1 (10 * AX25_SLOWHZ) /* T1=10s */
141: #define AX25_DEF_T2 (3 * AX25_SLOWHZ) /* T2=3s */
142: #define AX25_DEF_T3 (300 * AX25_SLOWHZ) /* T3=300s */
143: #define AX25_DEF_N2 10 /* N2=10 */
144: #define AX25_DEF_IDLE (0 * 60 * AX25_SLOWHZ) /* Idle=None */
145: #define AX25_DEF_PACLEN 256 /* Paclen=256 */
146:
147: typedef struct ax25_uid_assoc {
148: struct ax25_uid_assoc *next;
149: uid_t uid;
150: ax25_address call;
151: } ax25_uid_assoc;
152:
153: typedef struct {
154: ax25_address calls[AX25_MAX_DIGIS];
155: unsigned char repeated[AX25_MAX_DIGIS];
156: unsigned char ndigi;
157: char lastrepeat;
158: } ax25_digi;
159:
160: typedef struct ax25_cb {
161: struct ax25_cb *next;
162: ax25_address source_addr, dest_addr;
163: struct device *device;
164: unsigned char dama_slave, iamdigi;
165: unsigned char state, modulus, pidincl;
166: unsigned short vs, vr, va;
167: unsigned char condition, backoff;
168: unsigned char n2, n2count;
169: unsigned short t1, t2, t3, idle, rtt;
170: unsigned short t1timer, t2timer, t3timer, idletimer;
171: unsigned short paclen;
172: unsigned short fragno, fraglen;
173: ax25_digi *digipeat;
174: struct sk_buff_head write_queue;
175: struct sk_buff_head reseq_queue;
176: struct sk_buff_head ack_queue;
177: struct sk_buff_head frag_queue;
178: unsigned char window;
179: struct timer_list timer;
180: struct sock *sk; /* Backlink to socket */
181: } ax25_cb;
182:
183: #ifndef _LINUX_SYSCTL_H
184: #include <linux/sysctl.h>
185: #endif
186:
187: struct ax25_dev {
188: char name[20];
189: struct device *dev;
190: struct device *forward;
191: struct ctl_table systable[AX25_MAX_VALUES+1];
192: int values[AX25_MAX_VALUES];
193: };
194:
195: /* af_ax25.c */
196: extern ax25_address null_ax25_address;
197: extern char *ax2asc(ax25_address *);
198: extern ax25_address *asc2ax(char *);
199: extern int ax25cmp(ax25_address *, ax25_address *);
200: extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct device *);
201: extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct device *);
202: extern void ax25_destroy_socket(ax25_cb *);
203: extern struct device *ax25rtr_get_dev(ax25_address *);
204: extern int ax25_encapsulate(struct sk_buff *, struct device *, unsigned short,
205: void *, void *, unsigned int);
206: extern int ax25_rebuild_header(void *, struct device *, unsigned long, struct sk_buff *);
207: extern ax25_uid_assoc *ax25_uid_list;
208: extern int ax25_uid_policy;
209: extern ax25_address *ax25_findbyuid(uid_t);
210: extern void ax25_queue_xmit(struct sk_buff *, struct device *, int);
211: extern int ax25_dev_is_dama_slave(struct device *); /* dl1bke 951121 */
212:
213: #include <net/ax25call.h>
214:
215: /* ax25_in.c */
216: extern int ax25_process_rx_frame(ax25_cb *, struct sk_buff *, int, int);
217:
218: /* ax25_out.c */
219: extern void ax25_output(ax25_cb *, int, struct sk_buff *);
220: extern void ax25_kick(ax25_cb *);
221: extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
222: extern void ax25_nr_error_recovery(ax25_cb *);
223: extern void ax25_establish_data_link(ax25_cb *);
224: extern void ax25_transmit_enquiry(ax25_cb *);
225: extern void ax25_enquiry_response(ax25_cb *);
226: extern void ax25_timeout_response(ax25_cb *);
227: extern void ax25_check_iframes_acked(ax25_cb *, unsigned short);
228: extern void dama_enquiry_response(ax25_cb *); /* dl1bke 960114 */
229: extern void dama_establish_data_link(ax25_cb *);
230:
231: /* ax25_route.c */
232: extern struct ax25_dev ax25_device[];
233: extern int ax25_rt_get_info(char *, char **, off_t, int, int);
234: extern int ax25_cs_get_info(char *, char **, off_t, int, int);
235: extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
236: extern ax25_digi *ax25_rt_find_path(ax25_address *, struct device *);
237: extern void ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
238: extern void ax25_rt_device_down(struct device *);
239: extern int ax25_rt_ioctl(unsigned int, void *);
240: extern char ax25_rt_mode_get(ax25_address *, struct device *);
241: extern int ax25_dev_get_value(struct device *, int);
242: extern void ax25_dev_device_up(struct device *);
243: extern void ax25_dev_device_down(struct device *);
244: extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
245: extern struct device *ax25_fwd_dev(struct device *);
246: extern void ax25_rt_free(void);
247:
248: /* ax25_subr.c */
249: extern void ax25_clear_queues(ax25_cb *);
250: extern void ax25_frames_acked(ax25_cb *, unsigned short);
251: extern void ax25_requeue_frames(ax25_cb *);
252: extern int ax25_validate_nr(ax25_cb *, unsigned short);
253: extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
254: extern void ax25_send_control(ax25_cb *, int, int, int);
255: extern unsigned short ax25_calculate_t1(ax25_cb *);
256: extern void ax25_calculate_rtt(ax25_cb *);
257: extern unsigned char *ax25_parse_addr(unsigned char *, int, ax25_address *,
258: ax25_address *, ax25_digi *, int *, int *); /* dl1bke 951121 */
259: extern int build_ax25_addr(unsigned char *, ax25_address *, ax25_address *,
260: ax25_digi *, int, int);
261: extern int size_ax25_addr(ax25_digi *);
262: extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
263: extern void ax25_return_dm(struct device *, ax25_address *, ax25_address *, ax25_digi *);
264: extern void ax25_dama_on(ax25_cb *); /* dl1bke 951121 */
265: extern void ax25_dama_off(ax25_cb *); /* dl1bke 951121 */
266: extern void ax25_disconnect(ax25_cb *, int);
267:
268: /* ax25_timer.c */
269: extern void ax25_set_timer(ax25_cb *);
270: extern void ax25_t1_timeout(ax25_cb *);
271: extern void ax25_link_failed(ax25_cb *, int);
272: extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
273: extern int ax25_listen_mine(ax25_address *, struct device *);
274:
275: /* sysctl_net_ax25.c */
276: extern void ax25_register_sysctl(void);
277: extern void ax25_unregister_sysctl(void);
278:
279: /* ... */
280:
281: extern ax25_cb *volatile ax25_list;
282:
283: /* support routines for modules that use AX.25, in ax25_timer.c */
284: extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *));
285: extern void ax25_protocol_release(unsigned int);
286: extern int ax25_linkfail_register(void (*)(ax25_cb *, int));
287: extern void ax25_linkfail_release(void (*)(ax25_cb *, int));
288: extern int ax25_listen_register(ax25_address *, struct device *);
289: extern void ax25_listen_release(ax25_address *, struct device *);
290: extern int ax25_protocol_is_registered(unsigned int);
291:
292: #endif
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