2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
5 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
6 * Internet Initiative Japan, Inc (IIJ)
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Definition for Async HDLC
36 #define HDLC_SYN 0x7e /* SYNC character */
37 #define HDLC_ESC 0x7d /* Escape character */
38 #define HDLC_XOR 0x20 /* Modifier value */
40 #define HDLC_ADDR 0xff
43 * Definition for HDLC Frame Check Sequence
45 #define INITFCS 0xffff /* Initial value for FCS computation */
46 #define GOODFCS 0xf0b8 /* Good FCS value */
52 #define DEF_MTU 0 /* whatever peer says */
64 struct pppTimer ReportTimer;
74 struct lcp *owner; /* parent LCP */
75 struct pppTimer timer; /* When to send */
76 int method; /* bit-mask for LQM_* from lqr.h */
78 u_int32_t ifOutUniPackets; /* Packets sent by me */
79 u_int32_t ifOutOctets; /* Octets sent by me */
80 u_int32_t ifInUniPackets; /* Packets received from peer */
81 u_int32_t ifInDiscards; /* Discards */
82 u_int32_t ifInErrors; /* Errors */
83 u_int32_t ifInOctets; /* Octets received from peer (unused) */
86 u_int32_t InGoodOctets; /* Good octets received from peer */
87 u_int32_t OutLQRs; /* LQRs sent by me */
88 u_int32_t InLQRs; /* LQRs received from peer */
90 struct lqrsavedata Save; /* Our last LQR */
91 struct lqrsavedata prevSave; /* Our last-but-one LQR (analysis) */
93 struct lqrdata peer; /* Last LQR from peer */
94 int peer_timeout; /* peers max lqr timeout */
95 int resent; /* Resent last packet `resent' times */
99 u_int32_t seq_sent; /* last echo sent */
100 u_int32_t seq_recv; /* last echo received */
106 extern void hdlc_Init(struct hdlc *, struct lcp *);
107 extern void hdlc_StartTimer(struct hdlc *);
108 extern void hdlc_StopTimer(struct hdlc *);
109 extern int hdlc_ReportStatus(struct cmdargs const *);
110 extern const char *hdlc_Protocol2Nam(u_short);
111 extern void hdlc_DecodePacket(struct bundle *, u_short, struct mbuf *,
114 extern u_short hdlc_Fcs(u_char *, size_t);
115 extern int hdlc_Detect(u_char const **, unsigned, int);
116 #define hdlc_WrapperOctets() (2)
118 extern struct layer hdlclayer;