/* * Written by Toshiharu OHNO (tony-o@iij.ad.jp) * * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the Internet Initiative Japan. The name of the * IIJ may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * $Id: hdlc.h,v 1.14.2.6 1998/02/18 19:35:45 brian Exp $ * * TODO: */ /* * 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 /* * Output priority */ /* PRI_NORMAL and PRI_FAST have meaning only on the IP queue. * All IP frames have the same priority once they are compressed. * IP frames stay on the IP queue till they can be sent on the * link. They are compressed at that time. */ #define PRI_NORMAL 0 /* Normal priority */ #define PRI_FAST 1 /* Fast (interractive) */ #define PRI_LINK 1 /* Urgent (LQR packets) */ #define PRI_MAX 1 struct physical; struct link; 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 OutPackets; /* Packets sent by me */ u_int32_t OutOctets; /* Octets sent by me */ u_int32_t SaveInPackets; /* Packets received from peer */ u_int32_t SaveInDiscards; /* Discards */ u_int32_t SaveInErrors; /* Errors */ u_int32_t SaveInOctets; /* Octets received from peer */ struct { u_int32_t OutLQRs; /* LQRs sent by me */ u_int32_t SaveInLQRs; /* LQRs received from peer */ 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 *); 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 HdlcInput(struct bundle *, struct mbuf *, struct physical *); extern void HdlcOutput(struct link *, int, u_short, struct mbuf *bp); extern u_short HdlcFcs(u_short, u_char *, int); extern int ReportProtStatus(struct cmdargs const *); extern u_char *HdlcDetect(struct physical *, u_char *, int);