include/net/ax25.h

/* */
   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 PR_SLOWHZ       10              /*  Run timing at 1/10 second - gives us better resolution for 56kbit links */
  12 
  13 #define AX25_T1CLAMPLO  (1 * PR_SLOWHZ) /* If defined, clamp at 1 second **/
  14 #define AX25_T1CLAMPHI (30 * PR_SLOWHZ) /* If defined, clamp at 30 seconds **/
  15 
  16 #define AX25_BROKEN_NETMAC
  17 
  18 #define AX25_BPQ_HEADER_LEN     16
  19 #define AX25_KISS_HEADER_LEN    1
  20 
  21 #define AX25_HEADER_LEN         17
  22 #define AX25_ADDR_LEN           7
  23 #define AX25_DIGI_HEADER_LEN    (AX25_MAX_DIGIS * AX25_ADDR_LEN)
  24 #define AX25_MAX_HEADER_LEN     (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
  25  
  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 #define SEG_REM         0x7F
  33 #define SEG_FIRST       0x80
  34 
  35 #define LAPB_UI         0x03
  36 #define LAPB_C          0x80
  37 #define LAPB_E          0x01
  38 
  39 #define SSSID_SPARE     0x60    /* Unused bits in SSID for standard AX.25 */
  40 #define ESSID_SPARE     0x20    /* Unused bits in SSID for extended AX.25 */
  41 #define DAMA_FLAG       0x20    /* Well, it is *NOT* unused! (dl1bke 951121 */
  42 
  43 #define AX25_REPEATED   0x80
  44 
  45 #define ACK_PENDING_CONDITION           0x01
  46 #define REJECT_CONDITION                0x02
  47 #define PEER_RX_BUSY_CONDITION          0x04
  48 #define OWN_RX_BUSY_CONDITION           0x08
  49 
  50 #ifndef _LINUX_NETDEVICE_H
  51 #include <linux/netdevice.h>
  52 #endif
  53 
  54 /*
  55  * These headers are taken from the KA9Q package by Phil Karn. These specific
  56  * files have been placed under the GPL (not the whole package) by Phil.
  57  *
  58  *
  59  * Copyright 1991 Phil Karn, KA9Q
  60  *
  61  * This program is free software; you can redistribute it and/or modify
  62  * it under the terms of the GNU General Public License as published by
  63  * the Free Software Foundation; version 2 dated June, 1991.
  64  * 
  65  * This program is distributed in the hope that it will be useful,
  66  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  67  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  68  * GNU General Public License for more details.
  69  * 
  70  * You should have received a copy of the GNU General Public License
  71  * along with this program;  if not, write to the Free Software
  72  * Foundation, Inc., 675 Mass Ave., Cambridge, MA 02139, USA.
  73  */
  74 
  75 /* Upper sub-layer (LAPB) definitions */
  76 
  77 /* Control field templates */
  78 #define I       0x00    /* Information frames */
  79 #define S       0x01    /* Supervisory frames */
  80 #define RR      0x01    /* Receiver ready */
  81 #define RNR     0x05    /* Receiver not ready */
  82 #define REJ     0x09    /* Reject */
  83 #define U       0x03    /* Unnumbered frames */
  84 #define SABM    0x2f    /* Set Asynchronous Balanced Mode */
  85 #define SABME   0x6f    /* Set Asynchronous Balanced Mode Extended */
  86 #define DISC    0x43    /* Disconnect */
  87 #define DM      0x0f    /* Disconnected mode */
  88 #define UA      0x63    /* Unnumbered acknowledge */
  89 #define FRMR    0x87    /* Frame reject */
  90 #define UI      0x03    /* Unnumbered information */
  91 #define PF      0x10    /* Poll/final bit for standard AX.25 */
  92 #define EPF     0x01    /* Poll/final bit for extended AX.25 */
  93 
  94 #define ILLEGAL 0x100   /* Impossible to be a real frame type */
  95 
  96 #define POLLOFF         0
  97 #define POLLON          1
  98 
  99 /* AX25 L2 C-bit */
 100 
 101 #define C_COMMAND       1       /* C_ otherwise it clashes with the de600 defines (sigh)) */
 102 #define C_RESPONSE      2
 103 
 104 /* Define Link State constants. */
 105 
 106 #define AX25_STATE_0    0
 107 #define AX25_STATE_1    1
 108 #define AX25_STATE_2    2
 109 #define AX25_STATE_3    3
 110 #define AX25_STATE_4    4
 111 
 112 #define MODULUS         8                       /*  Standard AX.25 modulus */
 113 #define EMODULUS        128                     /*  Extended AX.25 modulus */
 114 
 115 #define AX25_DEF_IPDEFMODE      'D'
 116 #define AX25_DEF_AXDEFMODE      8
 117 #define AX25_DEF_NETROM         1
 118 #define AX25_DEF_TEXT           1
 119 #define AX25_DEF_BACKOFF        'E'
 120 #define AX25_DEF_CONMODE        1
 121 #define AX25_DEF_WINDOW         2
 122 #define AX25_DEF_EWINDOW        32
 123 #define AX25_DEF_T1             10
 124 #define AX25_DEF_T2             3
 125 #define AX25_DEF_T3             300
 126 #define AX25_DEF_N2             10
 127 #define AX25_DEF_IDLE           20
 128 #define AX25_DEF_PACLEN         256
 129 #define AX25_DEF_IPMAXQUEUE     1               /* 1 * ax25->window */
 130 #define AX25_DEF_DIGI           (AX25_DIGI_INBAND|AX25_DIGI_XBAND)
 131 
 132 typedef struct ax25_uid_assoc {
 133         struct ax25_uid_assoc *next;
 134         uid_t uid;
 135         ax25_address call;
 136 } ax25_uid_assoc;
 137 
 138 typedef struct {
 139         ax25_address calls[AX25_MAX_DIGIS];
 140         unsigned char repeated[AX25_MAX_DIGIS];
 141         unsigned char ndigi;
 142         char lastrepeat;
 143 } ax25_digi;
 144 
 145 typedef struct ax25_cb {
 146         struct ax25_cb          *next;
 147         ax25_address            source_addr, dest_addr;
 148         struct device           *device;
 149         unsigned char           dama_slave;     /* dl1bke 951121 */
 150         unsigned char           state, modulus, hdrincl;
 151         unsigned short          vs, vr, va;
 152         unsigned char           condition, backoff;
 153         unsigned char           n2, n2count;
 154         unsigned short          t1, t2, t3, idle, rtt;
 155         unsigned short          t1timer, t2timer, t3timer, idletimer;
 156         unsigned short          paclen;
 157         unsigned short          maxqueue;
 158         unsigned short          fragno, fraglen;
 159         ax25_digi               *digipeat;
 160         struct sk_buff_head     write_queue;
 161         struct sk_buff_head     reseq_queue;
 162         struct sk_buff_head     ack_queue;
 163         struct sk_buff_head     frag_queue;
 164         unsigned char           window;
 165         struct timer_list       timer;
 166         struct sock             *sk;            /* Backlink to socket */
 167 } ax25_cb;
 168 
 169 /* af_ax25.c */
 170 extern ax25_address null_ax25_address;
 171 extern char *ax2asc(ax25_address *);
 172 extern int  ax25cmp(ax25_address *, ax25_address *);
 173 extern int  ax25_send_frame(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *, struct device *);
 174 extern void ax25_destroy_socket(ax25_cb *);
 175 extern struct device *ax25rtr_get_dev(ax25_address *);
 176 extern int  ax25_encapsulate(struct sk_buff *, struct device *, unsigned short,
 177         void *, void *, unsigned int);
 178 extern int  ax25_rebuild_header(unsigned char *, struct device *, unsigned long, struct sk_buff *);
 179 extern ax25_uid_assoc *ax25_uid_list;
 180 extern int  ax25_uid_policy;
 181 extern ax25_address *ax25_findbyuid(uid_t);
 182 extern void ax25_queue_xmit(struct sk_buff *, struct device *, int);
 183 extern int  ax25_dev_is_dama_slave(struct device *);    /* dl1bke 951121 */
 184 
 185 #include <net/ax25call.h>
 186 
 187 /* ax25_in.c */
 188 extern int  ax25_process_rx_frame(ax25_cb *, struct sk_buff *, int, int);
 189 
 190 /* ax25_out.c */
 191 extern void ax25_output(ax25_cb *, struct sk_buff *);
 192 extern void ax25_kick(ax25_cb *);
 193 extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
 194 extern void ax25_nr_error_recovery(ax25_cb *);
 195 extern void ax25_establish_data_link(ax25_cb *);
 196 extern void ax25_transmit_enquiry(ax25_cb *);
 197 extern void ax25_enquiry_response(ax25_cb *);
 198 extern void ax25_timeout_response(ax25_cb *);
 199 extern void ax25_check_iframes_acked(ax25_cb *, unsigned short);
 200 extern void ax25_check_need_response(ax25_cb *, int, int);
 201 extern void dama_enquiry_response(ax25_cb *);                   /* dl1bke 960114 */
 202 extern void dama_check_need_response(ax25_cb *, int, int);      /* dl1bke 960114 */
 203 extern void dama_establish_data_link(ax25_cb *);
 204 
 205 /* ax25_route.c */
 206 extern void ax25_rt_rx_frame(ax25_address *, struct device *, ax25_digi *);
 207 extern int  ax25_rt_get_info(char *, char **, off_t, int, int);
 208 extern int  ax25_cs_get_info(char *, char **, off_t, int, int);
 209 extern int  ax25_rt_autobind(ax25_cb *, ax25_address *);
 210 extern void ax25_rt_build_path(ax25_cb *, ax25_address *);
 211 extern void ax25_dg_build_path(struct sk_buff *, ax25_address *, struct device *);
 212 extern void ax25_rt_device_down(struct device *);
 213 extern int  ax25_rt_ioctl(unsigned int, void *);
 214 extern void ax25_ip_mode_set(ax25_address *, struct device *, char);
 215 extern char ax25_ip_mode_get(ax25_address *, struct device *);
 216 extern unsigned short ax25_dev_get_value(struct device *, int);
 217 extern void ax25_dev_device_up(struct device *);
 218 extern void ax25_dev_device_down(struct device *);
 219 extern int  ax25_dev_ioctl(unsigned int, void *);
 220 extern int  ax25_bpq_get_info(char *, char **, off_t, int, int);
 221 extern ax25_address *ax25_bpq_get_addr(struct device *);
 222 extern int  ax25_bpq_ioctl(unsigned int, void *);
 223 
 224 /* ax25_subr.c */
 225 extern void ax25_clear_queues(ax25_cb *);
 226 extern void ax25_frames_acked(ax25_cb *, unsigned short);
 227 extern void ax25_requeue_frames(ax25_cb *);
 228 extern int  ax25_validate_nr(ax25_cb *, unsigned short);
 229 extern int  ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
 230 extern void ax25_send_control(ax25_cb *, int, int, int);
 231 extern unsigned short ax25_calculate_t1(ax25_cb *);
 232 extern void ax25_calculate_rtt(ax25_cb *);
 233 extern unsigned char *ax25_parse_addr(unsigned char *, int, ax25_address *,
 234         ax25_address *, ax25_digi *, int *, int *);     /* dl1bke 951121 */
 235 extern int  build_ax25_addr(unsigned char *, ax25_address *, ax25_address *,
 236         ax25_digi *, int, int);
 237 extern int  size_ax25_addr(ax25_digi *);
 238 extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
 239 extern void ax25_return_dm(struct device *, ax25_address *, ax25_address *, ax25_digi *);
 240 extern int  ax25_queue_length(ax25_cb *, struct sk_buff *); /* dl1bke 960327 */
 241 extern void ax25_dama_on(ax25_cb *);    /* dl1bke 951121 */
 242 extern void ax25_dama_off(ax25_cb *);   /* dl1bke 951121 */
 243 
 244 /* ax25_timer */
 245 extern void ax25_set_timer(ax25_cb *);
 246 extern void ax25_t1_timeout(ax25_cb *);
 247 
 248 /* ... */
 249 
 250 extern ax25_cb * volatile ax25_list;
 251 
 252 #endif
/* */
root/include/net/ax25.h

INCLUDED FROM
