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Diffstat (limited to 'src/hdlc.h')
| -rw-r--r-- | src/hdlc.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/hdlc.h b/src/hdlc.h new file mode 100644 index 0000000..bf503fe --- /dev/null +++ b/src/hdlc.h @@ -0,0 +1,116 @@ +/*- + * 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. + * + * $FreeBSD: src/usr.sbin/ppp/hdlc.h,v 1.24.26.1 2010/12/21 17:10:29 kensmith Exp $ + */ + +/* + * 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; |