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Diffstat (limited to 'linux/src/include/net/ax25.h')
| -rw-r--r-- | linux/src/include/net/ax25.h | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/linux/src/include/net/ax25.h b/linux/src/include/net/ax25.h new file mode 100644 index 0000000..fce33cf --- /dev/null +++ b/linux/src/include/net/ax25.h @@ -0,0 +1,292 @@ +/* + * Declarations of AX.25 type objects. + * + * Alan Cox (GW4PTS) 10/11/93 + */ + +#ifndef _AX25_H +#define _AX25_H +#include <linux/ax25.h> + +#define AX25_SLOWHZ 10 /* Run timing at 1/10 second - gives us better resolution for 56kbit links */ + +#define AX25_T1CLAMPLO (1 * AX25_SLOWHZ) /* If defined, clamp at 1 second **/ +#define AX25_T1CLAMPHI (30 * AX25_SLOWHZ) /* If defined, clamp at 30 seconds **/ + +#define AX25_BPQ_HEADER_LEN 16 +#define AX25_KISS_HEADER_LEN 1 + +#define AX25_HEADER_LEN 17 +#define AX25_ADDR_LEN 7 +#define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN) +#define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN) + +/* AX.25 Protocol IDs */ +#define AX25_P_ROSE 0x01 +#define AX25_P_IP 0xCC +#define AX25_P_ARP 0xCD +#define AX25_P_TEXT 0xF0 +#define AX25_P_NETROM 0xCF +#define AX25_P_SEGMENT 0x08 + +/* AX.25 Segment control values */ +#define AX25_SEG_REM 0x7F +#define AX25_SEG_FIRST 0x80 + +#define AX25_CBIT 0x80 /* Command/Response bit */ +#define AX25_EBIT 0x01 /* HDLC Address Extension bit */ +#define AX25_HBIT 0x80 /* Has been repeated bit */ + +#define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */ +#define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */ +#define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */ + +#define AX25_COND_ACK_PENDING 0x01 +#define AX25_COND_REJECT 0x02 +#define AX25_COND_PEER_RX_BUSY 0x04 +#define AX25_COND_OWN_RX_BUSY 0x08 + +#ifndef _LINUX_NETDEVICE_H +#include <linux/netdevice.h> +#endif + +/* + * These headers are taken from the KA9Q package by Phil Karn. These specific + * files have been placed under the GPL (not the whole package) by Phil. + * + * + * Copyright 1991 Phil Karn, KA9Q + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 dated June, 1991. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave., Cambridge, MA 02139, USA. + */ + +/* Upper sub-layer (LAPB) definitions */ + +/* Control field templates */ +#define AX25_I 0x00 /* Information frames */ +#define AX25_S 0x01 /* Supervisory frames */ +#define AX25_RR 0x01 /* Receiver ready */ +#define AX25_RNR 0x05 /* Receiver not ready */ +#define AX25_REJ 0x09 /* Reject */ +#define AX25_U 0x03 /* Unnumbered frames */ +#define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */ +#define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */ +#define AX25_DISC 0x43 /* Disconnect */ +#define AX25_DM 0x0f /* Disconnected mode */ +#define AX25_UA 0x63 /* Unnumbered acknowledge */ +#define AX25_FRMR 0x87 /* Frame reject */ +#define AX25_UI 0x03 /* Unnumbered information */ + +#define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */ +#define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */ + +#define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */ + +#define AX25_POLLOFF 0 +#define AX25_POLLON 1 + +/* AX25 L2 C-bit */ +#define AX25_COMMAND 1 +#define AX25_RESPONSE 2 + +/* Define Link State constants. */ + +enum { + AX25_STATE_0, + AX25_STATE_1, + AX25_STATE_2, + AX25_STATE_3, + AX25_STATE_4 +}; + +#define AX25_MAX_DEVICES 20 /* Max No of AX.25 devices */ + +#define AX25_MODULUS 8 /* Standard AX.25 modulus */ +#define AX25_EMODULUS 128 /* Extended AX.25 modulus */ + +enum { + AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */ + AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */ + AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */ + AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */ + AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */ + AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */ + AX25_VALUES_T1, /* Default T1 timeout value */ + AX25_VALUES_T2, /* Default T2 timeout value */ + AX25_VALUES_T3, /* Default T3 timeout value */ + AX25_VALUES_IDLE, /* Connected mode idle timer */ + AX25_VALUES_N2, /* Default N2 value */ + AX25_VALUES_PACLEN, /* AX.25 MTU */ + AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */ +}; + +#define AX25_DEF_IPDEFMODE 0 /* Datagram */ +#define AX25_DEF_AXDEFMODE 0 /* Normal */ +#define AX25_DEF_BACKOFF 1 /* Linear backoff */ +#define AX25_DEF_CONMODE 2 /* Connected mode allowed */ +#define AX25_DEF_WINDOW 2 /* Window=2 */ +#define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */ +#define AX25_DEF_T1 (10 * AX25_SLOWHZ) /* T1=10s */ +#define AX25_DEF_T2 (3 * AX25_SLOWHZ) /* T2=3s */ +#define AX25_DEF_T3 (300 * AX25_SLOWHZ) /* T3=300s */ +#define AX25_DEF_N2 10 /* N2=10 */ +#define AX25_DEF_IDLE (0 * 60 * AX25_SLOWHZ) /* Idle=None */ +#define AX25_DEF_PACLEN 256 /* Paclen=256 */ + +typedef struct ax25_uid_assoc { + struct ax25_uid_assoc *next; + uid_t uid; + ax25_address call; +} ax25_uid_assoc; + +typedef struct { + ax25_address calls[AX25_MAX_DIGIS]; + unsigned char repeated[AX25_MAX_DIGIS]; + unsigned char ndigi; + char lastrepeat; +} ax25_digi; + +typedef struct ax25_cb { + struct ax25_cb *next; + ax25_address source_addr, dest_addr; + struct device *device; + unsigned char dama_slave, iamdigi; + unsigned char state, modulus, pidincl; + unsigned short vs, vr, va; + unsigned char condition, backoff; + unsigned char n2, n2count; + unsigned short t1, t2, t3, idle, rtt; + unsigned short t1timer, t2timer, t3timer, idletimer; + unsigned short paclen; + unsigned short fragno, fraglen; + ax25_digi *digipeat; + struct sk_buff_head write_queue; + struct sk_buff_head reseq_queue; + struct sk_buff_head ack_queue; + struct sk_buff_head frag_queue; + unsigned char window; + struct timer_list timer; + struct sock *sk; /* Backlink to socket */ +} ax25_cb; + +#ifndef _LINUX_SYSCTL_H +#include <linux/sysctl.h> +#endif + +struct ax25_dev { + char name[20]; + struct device *dev; + struct device *forward; + struct ctl_table systable[AX25_MAX_VALUES+1]; + int values[AX25_MAX_VALUES]; +}; + +/* af_ax25.c */ +extern ax25_address null_ax25_address; +extern char *ax2asc(ax25_address *); +extern ax25_address *asc2ax(char *); +extern int ax25cmp(ax25_address *, ax25_address *); +extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct device *); +extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct device *); +extern void ax25_destroy_socket(ax25_cb *); +extern struct device *ax25rtr_get_dev(ax25_address *); +extern int ax25_encapsulate(struct sk_buff *, struct device *, unsigned short, + void *, void *, unsigned int); +extern int ax25_rebuild_header(void *, struct device *, unsigned long, struct sk_buff *); +extern ax25_uid_assoc *ax25_uid_list; +extern int ax25_uid_policy; +extern ax25_address *ax25_findbyuid(uid_t); +extern void ax25_queue_xmit(struct sk_buff *, struct device *, int); +extern int ax25_dev_is_dama_slave(struct device *); /* dl1bke 951121 */ + +#include <net/ax25call.h> + +/* ax25_in.c */ +extern int ax25_process_rx_frame(ax25_cb *, struct sk_buff *, int, int); + +/* ax25_out.c */ +extern void ax25_output(ax25_cb *, int, struct sk_buff *); +extern void ax25_kick(ax25_cb *); +extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int); +extern void ax25_nr_error_recovery(ax25_cb *); +extern void ax25_establish_data_link(ax25_cb *); +extern void ax25_transmit_enquiry(ax25_cb *); +extern void ax25_enquiry_response(ax25_cb *); +extern void ax25_timeout_response(ax25_cb *); +extern void ax25_check_iframes_acked(ax25_cb *, unsigned short); +extern void dama_enquiry_response(ax25_cb *); /* dl1bke 960114 */ +extern void dama_establish_data_link(ax25_cb *); + +/* ax25_route.c */ +extern struct ax25_dev ax25_device[]; +extern int ax25_rt_get_info(char *, char **, off_t, int, int); +extern int ax25_cs_get_info(char *, char **, off_t, int, int); +extern int ax25_rt_autobind(ax25_cb *, ax25_address *); +extern ax25_digi *ax25_rt_find_path(ax25_address *, struct device *); +extern void ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *); +extern void ax25_rt_device_down(struct device *); +extern int ax25_rt_ioctl(unsigned int, void *); +extern char ax25_rt_mode_get(ax25_address *, struct device *); +extern int ax25_dev_get_value(struct device *, int); +extern void ax25_dev_device_up(struct device *); +extern void ax25_dev_device_down(struct device *); +extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *); +extern struct device *ax25_fwd_dev(struct device *); +extern void ax25_rt_free(void); + +/* ax25_subr.c */ +extern void ax25_clear_queues(ax25_cb *); +extern void ax25_frames_acked(ax25_cb *, unsigned short); +extern void ax25_requeue_frames(ax25_cb *); +extern int ax25_validate_nr(ax25_cb *, unsigned short); +extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *); +extern void ax25_send_control(ax25_cb *, int, int, int); +extern unsigned short ax25_calculate_t1(ax25_cb *); +extern void ax25_calculate_rtt(ax25_cb *); +extern unsigned char *ax25_parse_addr(unsigned char *, int, ax25_address *, + ax25_address *, ax25_digi *, int *, int *); /* dl1bke 951121 */ +extern int build_ax25_addr(unsigned char *, ax25_address *, ax25_address *, + ax25_digi *, int, int); +extern int size_ax25_addr(ax25_digi *); +extern void ax25_digi_invert(ax25_digi *, ax25_digi *); +extern void ax25_return_dm(struct device *, ax25_address *, ax25_address *, ax25_digi *); +extern void ax25_dama_on(ax25_cb *); /* dl1bke 951121 */ +extern void ax25_dama_off(ax25_cb *); /* dl1bke 951121 */ +extern void ax25_disconnect(ax25_cb *, int); + +/* ax25_timer.c */ +extern void ax25_set_timer(ax25_cb *); +extern void ax25_t1_timeout(ax25_cb *); +extern void ax25_link_failed(ax25_cb *, int); +extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); +extern int ax25_listen_mine(ax25_address *, struct device *); + +/* sysctl_net_ax25.c */ +extern void ax25_register_sysctl(void); +extern void ax25_unregister_sysctl(void); + +/* ... */ + +extern ax25_cb *volatile ax25_list; + +/* support routines for modules that use AX.25, in ax25_timer.c */ +extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *)); +extern void ax25_protocol_release(unsigned int); +extern int ax25_linkfail_register(void (*)(ax25_cb *, int)); +extern void ax25_linkfail_release(void (*)(ax25_cb *, int)); +extern int ax25_listen_register(ax25_address *, struct device *); +extern void ax25_listen_release(ax25_address *, struct device *); +extern int ax25_protocol_is_registered(unsigned int); + +#endif |