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