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