/* * Declarations of AX.25 type objects. * * Alan Cox (GW4PTS) 10/11/93 */ #ifndef _AX25_H #define _AX25_H #include #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_ADDR_LEN 7 #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 #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 #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 #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 #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 #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 = 0, AX25_STATE_1, AX25_STATE_2, AX25_STATE_3, AX25_STATE_4, AX25_LISTEN }; typedef enum { AX25_SEQMASK = 7, AX25_ESEQMASK = 127 } ax25_seqmask_t; #ifndef _AX25_VJ_H struct axvj_slcomp; #endif typedef struct { 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; 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; 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 rcv_queue; /* MW: for flow control handling */ struct sk_buff_head ack_queue; struct sk_buff_head frag_queue; 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; 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 extern ax25_address* asc2ax(char *); extern ax25_address null_ax25_address; 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 void ax25_output(ax25_cb *, int, struct sk_buff *); /* ax25_timer.c */ 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 */ extern void ax25_register_sysctl(void); extern void ax25_unregister_sysctl(void); /* 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