diff options
Diffstat (limited to 'include/net/ax25.h')
| -rw-r--r-- | include/net/ax25.h | 381 |
1 files changed, 135 insertions, 246 deletions
diff --git a/include/net/ax25.h b/include/net/ax25.h index 0957d1aae..fc0509a3f 100644 --- a/include/net/ax25.h +++ b/include/net/ax25.h @@ -6,19 +6,27 @@ #ifndef _AX25_H #define _AX25_H -#include <linux/config.h> #include <linux/ax25.h> -#define AX25_T1CLAMPLO 1 -#define AX25_T1CLAMPHI (30 * HZ) +#define AX25_TICS (HZ/10) /* AX25 timertic is 1/10 sec (100 ms) */ +#define AX25_SLOWHZ 10 /* 10 timertics, 1 second */ + +#define AX25_T1CLAMPLO AX25_SLOWHZ /* 1 sec */ +#define AX25_T1CLAMPHI (30 * AX25_SLOWHZ) /* 30 secs */ #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) +#define AX25_MIN_HEADER_LEN (AX25_ADDR_LEN*2+1) /* Source, Destination, Control */ +#define AX25_MAX_HEADER_LEN (AX25_MIN_HEADER_LEN+1+AX25_ADDR_LEN*AX25_MAX_DIGIS) /* ... including Digipeaters */ + +/* + * these are obsolete + * + * #define AX25_KISS_HEADER_LEN 1 + * #define AX25_HEADER_LEN 17 + * #define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN) + */ /* AX.25 Protocol IDs */ #define AX25_P_ROSE 0x01 @@ -27,6 +35,8 @@ #define AX25_P_TEXT 0xF0 #define AX25_P_NETROM 0xCF #define AX25_P_SEGMENT 0x08 +#define AX25_P_VJCOMP 0x06 /* Matthias Welwarsky (DG2FEF) */ +#define AX25_P_VJUNCOMP 0x07 /* Matthias Welwarsky (DG2FEF) */ /* AX.25 Segment control values */ #define AX25_SEG_REM 0x7F @@ -38,18 +48,45 @@ #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_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 -#define AX25_COND_DAMA_MODE 0x10 +#define AX25_COND_STATE_CHANGE 0x10 +#define AX25_COND_RELEASE 0x20 +#define AX25_COND_SETUP 0x40 +#define AX25_COND_START_T1 0x80 + +#define AX25_SCHED_IDLE 0 +#define AX25_SCHED_READY 1 #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 */ @@ -81,270 +118,122 @@ /* Define Link State constants. */ -enum { - AX25_STATE_0, +enum { + AX25_STATE_0 = 0, AX25_STATE_1, AX25_STATE_2, AX25_STATE_3, - AX25_STATE_4 -}; - -#define AX25_MODULUS 8 /* Standard AX.25 modulus */ -#define AX25_EMODULUS 128 /* Extended AX.25 modulus */ - -enum { - AX25_PROTO_STD_SIMPLEX, - AX25_PROTO_STD_DUPLEX, - AX25_PROTO_DAMA_SLAVE, - AX25_PROTO_DAMA_MASTER + AX25_STATE_4, + AX25_LISTEN }; -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_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */ - AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */ - AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */ -}; +typedef enum { + AX25_SEQMASK = 7, + AX25_ESEQMASK = 127 +} ax25_seqmask_t; -#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 * HZ) /* T1=10s */ -#define AX25_DEF_T2 (3 * HZ) /* T2=3s */ -#define AX25_DEF_T3 (300 * HZ) /* T3=300s */ -#define AX25_DEF_N2 10 /* N2=10 */ -#define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */ -#define AX25_DEF_PACLEN 256 /* Paclen=256 */ -#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */ -#define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */ - -typedef struct ax25_uid_assoc { - struct ax25_uid_assoc *next; - uid_t uid; - ax25_address call; -} ax25_uid_assoc; +#ifndef _AX25_VJ_H +struct axvj_slcomp; +#endif typedef struct { - ax25_address calls[AX25_MAX_DIGIS]; - unsigned char repeated[AX25_MAX_DIGIS]; - unsigned char ndigi; - char lastrepeat; -} ax25_digi; - -typedef struct ax25_route { - struct ax25_route *next; - ax25_address callsign; - struct net_device *dev; - ax25_digi *digipeat; - char ip_mode; -} ax25_route; - -typedef struct { - char slave; /* slave_mode? */ - struct timer_list slave_timer; /* timeout timer */ - unsigned short slave_timeout; /* when? */ -} ax25_dama_info; - -struct ctl_table; - -typedef struct ax25_dev { - struct ax25_dev *next; - struct net_device *dev; - struct net_device *forward; - struct ctl_table *systable; - int values[AX25_MAX_VALUES]; -#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) - ax25_dama_info dama; -#endif -} ax25_dev; + unsigned int csum; + struct sk_buff *skb; +} ax25_reseq_t; typedef struct ax25_cb { + struct ax25_cb *prev; /* doubly linked list now */ struct ax25_cb *next; - ax25_address source_addr, dest_addr; - ax25_digi *digipeat; - ax25_dev *ax25_dev; - unsigned char iamdigi; - unsigned char state, modulus, pidincl; - unsigned short vs, vr, va; - unsigned char condition, backoff; + struct ax25_cb *peer; /* for FlexNet style digipeating */ + struct net_device *device; /* backlink to device structure */ + int inserted; /* Socket is on a list */ + struct sock *sk; /* Backlink to socket */ + + /* used by the DDI layer */ + struct { + int state; + struct ax25_cb *prev; + struct ax25_cb *next; + } ready; + + unsigned short tx_cmd, tx_rsp; + + /* layer II values + * + * vs = sequence number assigned to next to be transmitted I frame + * va = sequence number of first I frame our peer has not acked yet + * vr = sequence number of next frame we expect to receive from peer + * vl = last frame we ack'ed yet + */ + ax25_addr_t addr; + unsigned char state, condition; + unsigned short vs, vr, va, vs_max, vl, window; + ax25_seqmask_t seqmask; + unsigned long rtt_timestamp; + short rtt, vs_rtt; unsigned char n2, n2count; - struct timer_list t1timer, t2timer, t3timer, idletimer; - unsigned long t1, t2, t3, idle, rtt; + unsigned short t1, t2, t3, idle; + unsigned short wrt_timer, ack_timer, idletimer, killtimer; unsigned short paclen, fragno, fraglen; + unsigned char iamdigi, pidincl, backoff; struct sk_buff_head write_queue; - struct sk_buff_head reseq_queue; + struct sk_buff_head rcv_queue; /* MW: for flow control handling */ 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 */ + struct axvj_slcomp *slcomp; /* MW: for VJ Compression */ + unsigned char slcomp_enable; /* MW: dito. */ + ax25_reseq_t reseq[AX25_SEQMASK+1]; /* MW: resequencer, not for EMODULUS */ + rwlock_t timer_lock; } ax25_cb; -/* af_ax25.c */ -extern ax25_cb *volatile ax25_list; -extern void ax25_free_cb(ax25_cb *); -extern void ax25_insert_socket(ax25_cb *); -struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int); -struct sock *ax25_find_socket(ax25_address *, ax25_address *, int); -extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *); -extern struct sock *ax25_addr_match(ax25_address *); -extern void ax25_send_to_raw(struct sock *, struct sk_buff *, int); -extern void ax25_destroy_socket(ax25_cb *); -extern ax25_cb *ax25_create_cb(void); -extern void ax25_fillin_cb(ax25_cb *, ax25_dev *); -extern int ax25_create(struct socket *, int); -extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *); - -/* ax25_addr.c */ +typedef struct { + ax25_addr_t addr; + unsigned short frametype; + unsigned short nr; + unsigned short ns; + unsigned char pf; + unsigned char cmdrsp; + unsigned char dama; +} ax25_pktinfo; + +#define DAMA_STATE(ax25_cb) (AX25_PTR(ax25_cb->device)->dama_mode) + +/* needed by netrom/rose */ +extern __inline__ unsigned long ax25_display_timer(struct timer_list *timer) +{ + if (!timer_pending(timer)) + return 0; + return timer->expires - jiffies; +} + +#include <net/ax25call.h> + +extern ax25_address* asc2ax(char *); extern ax25_address null_ax25_address; -extern char *ax2asc(ax25_address *); -extern ax25_address *asc2ax(char *); -extern int ax25cmp(ax25_address *, ax25_address *); -extern int ax25digicmp(ax25_digi *, ax25_digi *); -extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *); -extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int); -extern int ax25_addr_size(ax25_digi *); -extern void ax25_digi_invert(ax25_digi *, ax25_digi *); - -/* ax25_dev.c */ -extern ax25_dev *ax25_dev_list; -extern ax25_dev *ax25_dev_ax25dev(struct net_device *); -extern ax25_dev *ax25_addr_ax25dev(ax25_address *); -extern void ax25_dev_device_up(struct net_device *); -extern void ax25_dev_device_down(struct net_device *); -extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *); -extern struct net_device *ax25_fwd_dev(struct net_device *); -extern void ax25_dev_free(void); - -/* ax25_ds_in.c */ -extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int); - -/* ax25_ds_subr.c */ -extern void ax25_ds_nr_error_recovery(ax25_cb *); -extern void ax25_ds_enquiry_response(ax25_cb *); -extern void ax25_ds_establish_data_link(ax25_cb *); -extern void ax25_dev_dama_on(ax25_dev *); -extern void ax25_dev_dama_off(ax25_dev *); -extern void ax25_dama_on(ax25_cb *); -extern void ax25_dama_off(ax25_cb *); - -/* ax25_ds_timer.c */ -extern void ax25_ds_set_timer(ax25_dev *); -extern void ax25_ds_del_timer(ax25_dev *); -extern void ax25_ds_timer(ax25_cb *); -extern void ax25_ds_t1_timeout(ax25_cb *); -extern void ax25_ds_heartbeat_expiry(ax25_cb *); -extern void ax25_ds_t3timer_expiry(ax25_cb *); -extern void ax25_ds_idletimer_expiry(ax25_cb *); - -/* ax25_iface.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 net_device *); -extern void ax25_listen_release(ax25_address *, struct net_device *); -extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); -extern int ax25_listen_mine(ax25_address *, struct net_device *); -extern void ax25_link_failed(ax25_cb *, int); -extern int ax25_protocol_is_registered(unsigned int); - -/* ax25_in.c */ -extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *); -extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *); - -/* ax25_ip.c */ -extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int); -extern int ax25_rebuild_header(struct sk_buff *); +extern char* ax2asc(ax25_address *); +extern int ax25cmp(ax25_address *, ax25_address *); +extern ax25_cb *ax25_send_frame(struct sk_buff*, int, ax25_addr_t*, struct net_device*); +extern ax25_cb *ax25_find_cb(ax25_addr_t*, struct net_device*); /* ax25_out.c */ -extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *); 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_queue_xmit(struct sk_buff *); -extern int ax25_check_iframes_acked(ax25_cb *, unsigned short); - -/* ax25_route.c */ -extern void ax25_rt_device_down(struct net_device *); -extern int ax25_rt_ioctl(unsigned int, void *); -extern int ax25_rt_get_info(char *, char **, off_t, int); -extern int ax25_rt_autobind(ax25_cb *, ax25_address *); -extern ax25_route *ax25_rt_find_route(ax25_address *, struct net_device *); -extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *); -extern void ax25_rt_free(void); - -/* ax25_std_in.c */ -extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int); - -/* ax25_std_subr.c */ -extern void ax25_std_nr_error_recovery(ax25_cb *); -extern void ax25_std_establish_data_link(ax25_cb *); -extern void ax25_std_transmit_enquiry(ax25_cb *); -extern void ax25_std_enquiry_response(ax25_cb *); -extern void ax25_std_timeout_response(ax25_cb *); - -/* ax25_std_timer.c */ -extern void ax25_std_heartbeat_expiry(ax25_cb *); -extern void ax25_std_t1timer_expiry(ax25_cb *); -extern void ax25_std_t2timer_expiry(ax25_cb *); -extern void ax25_std_t3timer_expiry(ax25_cb *); -extern void ax25_std_idletimer_expiry(ax25_cb *); - -/* 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 void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *); -extern void ax25_calculate_t1(ax25_cb *); -extern void ax25_calculate_rtt(ax25_cb *); -extern void ax25_disconnect(ax25_cb *, int); /* ax25_timer.c */ -extern void ax25_start_heartbeat(ax25_cb *); -extern void ax25_start_t1timer(ax25_cb *); -extern void ax25_start_t2timer(ax25_cb *); -extern void ax25_start_t3timer(ax25_cb *); -extern void ax25_start_idletimer(ax25_cb *); -extern void ax25_stop_heartbeat(ax25_cb *); -extern void ax25_stop_t1timer(ax25_cb *); -extern void ax25_stop_t2timer(ax25_cb *); -extern void ax25_stop_t3timer(ax25_cb *); -extern void ax25_stop_idletimer(ax25_cb *); -extern int ax25_t1timer_running(ax25_cb *); -extern unsigned long ax25_display_timer(struct timer_list *); - -/* ax25_uid.c */ -extern int ax25_uid_policy; -extern ax25_address *ax25_findbyuid(uid_t); -extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *); -extern int ax25_uid_get_info(char *, char **, off_t, int); -extern void ax25_uid_free(void); +extern void ax25_timer(ax25_cb *); +extern void ax25_link_failed(ax25_cb *, int); +extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); /* sysctl_net_ax25.c */ -#ifdef CONFIG_SYSCTL extern void ax25_register_sysctl(void); extern void ax25_unregister_sysctl(void); -#else -extern inline void ax25_register_sysctl(void) {}; -extern inline void ax25_unregister_sysctl(void) {}; -#endif /* CONFIG_SYSCTL */ + +/* 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 net_device *); +extern void ax25_listen_release(ax25_address *, struct net_device *); +extern int ax25_protocol_is_registered(unsigned int); #endif |