/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
* based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
* Internet Initiative Japan, Inc (IIJ)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* 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
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 ifOutUniPackets; /* Packets sent by me */
u_int32_t ifOutOctets; /* Octets sent by me */
u_int32_t ifInUniPackets; /* Packets received from peer */
u_int32_t ifInDiscards; /* Discards */
u_int32_t ifInErrors; /* Errors */
u_int32_t ifInOctets; /* Octets received from peer (unused) */
struct {
u_int32_t InGoodOctets; /* Good octets received from peer */
u_int32_t OutLQRs; /* LQRs sent by me */
u_int32_t InLQRs; /* LQRs received from peer */
struct lqrsavedata Save; /* Our last LQR */
struct lqrsavedata prevSave; /* Our last-but-one LQR (analysis) */
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 u_short hdlc_Fcs(u_char *, size_t);
extern int hdlc_Detect(u_char const **, unsigned, int);
#define hdlc_WrapperOctets() (2)
extern struct layer hdlclayer;
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