1 /* 2 * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 3 * 4 * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. 5 * 6 * Redistribution and use in source and binary forms are permitted 7 * provided that the above copyright notice and this paragraph are 8 * duplicated in all such forms and that any documentation, 9 * advertising materials, and other materials related to such 10 * distribution and use acknowledge that the software was developed 11 * by the Internet Initiative Japan. The name of the 12 * IIJ may not be used to endorse or promote products derived 13 * from this software without specific prior written permission. 14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 17 * 18 * $Id: hdlc.h,v 1.14.2.7 1998/03/13 00:44:04 brian Exp $ 19 * 20 * TODO: 21 */ 22 23 /* 24 * Definition for Async HDLC 25 */ 26 #define HDLC_SYN 0x7e /* SYNC character */ 27 #define HDLC_ESC 0x7d /* Escape character */ 28 #define HDLC_XOR 0x20 /* Modifier value */ 29 30 #define HDLC_ADDR 0xff 31 #define HDLC_UI 0x03 32 /* 33 * Definition for HDLC Frame Check Sequence 34 */ 35 #define INITFCS 0xffff /* Initial value for FCS computation */ 36 #define GOODFCS 0xf0b8 /* Good FCS value */ 37 38 #define DEF_MRU 1500 39 #define MAX_MRU 2048 40 #define MIN_MRU 296 41 42 #define DEF_MTU 0 /* whatever peer says */ 43 #define MAX_MTU 2048 44 #define MIN_MTU 296 45 46 /* 47 * Output priority 48 */ 49 /* PRI_NORMAL and PRI_FAST have meaning only on the IP queue. 50 * All IP frames have the same priority once they are compressed. 51 * IP frames stay on the IP queue till they can be sent on the 52 * link. They are compressed at that time. 53 */ 54 #define PRI_NORMAL 0 /* Normal priority */ 55 #define PRI_FAST 1 /* Fast (interractive) */ 56 #define PRI_LINK 1 /* Urgent (LQR packets) */ 57 #define PRI_MAX 1 58 59 struct physical; 60 struct link; 61 62 struct hdlc { 63 struct pppTimer ReportTimer; 64 65 struct { 66 int badfcs; 67 int badaddr; 68 int badcommand; 69 int unknownproto; 70 } laststats, stats; 71 72 struct { 73 struct lcp *owner; /* parent LCP */ 74 struct pppTimer timer; /* When to send */ 75 int method; /* bit-mask for LQM_* from lqr.h */ 76 77 u_int32_t OutPackets; /* Packets sent by me */ 78 u_int32_t OutOctets; /* Octets sent by me */ 79 u_int32_t SaveInPackets; /* Packets received from peer */ 80 u_int32_t SaveInDiscards; /* Discards */ 81 u_int32_t SaveInErrors; /* Errors */ 82 u_int32_t SaveInOctets; /* Octets received from peer */ 83 84 struct { 85 u_int32_t OutLQRs; /* LQRs sent by me */ 86 u_int32_t SaveInLQRs; /* LQRs received from peer */ 87 struct lqrdata peer; /* Last LQR from peer */ 88 int peer_timeout; /* peers max lqr timeout */ 89 int resent; /* Resent last packet `resent' times */ 90 } lqr; 91 92 struct { 93 u_int32_t seq_sent; /* last echo sent */ 94 u_int32_t seq_recv; /* last echo received */ 95 } echo; 96 } lqm; 97 98 }; 99 100 101 extern void hdlc_Init(struct hdlc *); 102 extern void hdlc_StartTimer(struct hdlc *); 103 extern void hdlc_StopTimer(struct hdlc *); 104 extern int hdlc_ReportStatus(struct cmdargs const *); 105 extern const char *hdlc_Protocol2Nam(u_short); 106 107 extern void HdlcInput(struct bundle *, struct mbuf *, struct physical *); 108 extern void HdlcOutput(struct link *, int, u_short, struct mbuf *bp); 109 extern u_short HdlcFcs(u_short, u_char *, int); 110 extern int ReportProtStatus(struct cmdargs const *); 111 extern u_char *HdlcDetect(struct physical *, u_char *, int); 112 extern void hdlc_DecodePacket(struct bundle *, u_short, struct mbuf *, 113 struct link *); 114