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/*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: hdlc.h,v 1.14.2.12 1998/05/01 19:24:39 brian Exp $
*
* TODO:
*/
/*
* Definition for Async HDLC
*/
#define HDLC_SYN 0x7e /* SYNC character */
#define HDLC_ESC 0x7d /* Escape character */
#define HDLC_XOR 0x20 /* Modifier value */
#define HDLC_ADDR 0xff
#define HDLC_UI 0x03
/*
* Definition for HDLC Frame Check Sequence
*/
#define INITFCS 0xffff /* Initial value for FCS computation */
#define GOODFCS 0xf0b8 /* Good FCS value */
#define DEF_MRU 1500
#define MAX_MRU 2048
#define MIN_MRU 296
#define DEF_MTU 0 /* whatever peer says */
#define MAX_MTU 2048
#define MIN_MTU 296
/*
* Output priority
*/
/* PRI_NORMAL and PRI_FAST have meaning only on the IP queue.
* All IP frames have the same priority once they are compressed.
* IP frames stay on the IP queue till they can be sent on the
* link. They are compressed at that time.
*/
#define PRI_NORMAL 0 /* Normal priority */
#define PRI_FAST 1 /* Fast (interractive) */
#define PRI_LINK 1 /* Urgent (LQR packets) */
#define PRI_MAX 1
struct physical;
struct link;
struct lcp;
struct bundle;
struct mbuf;
struct cmdargs;
struct hdlc {
struct pppTimer ReportTimer;
struct {
int badfcs;
int badaddr;
int badcommand;
int unknownproto;
} laststats, stats;
struct {
struct lcp *owner; /* parent LCP */
struct pppTimer timer; /* When to send */
int method; /* bit-mask for LQM_* from lqr.h */
u_int32_t OutPackets; /* Packets sent by me */
u_int32_t OutOctets; /* Octets sent by me */
u_int32_t SaveInPackets; /* Packets received from peer */
u_int32_t SaveInDiscards; /* Discards */
u_int32_t SaveInErrors; /* Errors */
u_int32_t SaveInOctets; /* Octets received from peer */
struct {
u_int32_t OutLQRs; /* LQRs sent by me */
u_int32_t SaveInLQRs; /* LQRs received from peer */
struct lqrdata peer; /* Last LQR from peer */
int peer_timeout; /* peers max lqr timeout */
int resent; /* Resent last packet `resent' times */
} lqr;
struct {
u_int32_t seq_sent; /* last echo sent */
u_int32_t seq_recv; /* last echo received */
} echo;
} lqm;
};
extern void hdlc_Init(struct hdlc *, struct lcp *);
extern void hdlc_StartTimer(struct hdlc *);
extern void hdlc_StopTimer(struct hdlc *);
extern int hdlc_ReportStatus(struct cmdargs const *);
extern const char *hdlc_Protocol2Nam(u_short);
extern void hdlc_DecodePacket(struct bundle *, u_short, struct mbuf *,
struct link *);
extern void hdlc_Input(struct bundle *, struct mbuf *, struct physical *);
extern void hdlc_Output(struct link *, int, u_short, struct mbuf *bp);
extern u_short hdlc_Fcs(u_short, u_char *, int);
extern u_char *hdlc_Detect(struct physical *, u_char *, int);
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