1/* $NetBSD: ppp_defs.h,v 1.12 2007/02/17 22:34:10 dyoung Exp $ */ 2/* Id: ppp_defs.h,v 1.11 1997/04/30 05:46:24 paulus Exp */ 3 4/* 5 * ppp_defs.h - PPP definitions. 6 * 7 * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The name(s) of the authors of this software must not be used to 22 * endorse or promote products derived from this software without 23 * prior written permission. 24 * 25 * 4. Redistributions of any form whatsoever must retain the following 26 * acknowledgment: 27 * "This product includes software developed by Paul Mackerras 28 * <paulus@samba.org>". 29 * 30 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO 31 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 32 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY 33 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 34 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 35 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 36 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 37 */ 38 39#ifndef _NET_PPP_DEFS_H_ 40#define _NET_PPP_DEFS_H_ 41 42/* 43 * The basic PPP frame. 44 */ 45#define PPP_HDRLEN 4 /* octets for standard ppp header */ 46#define PPP_FCSLEN 2 /* octets for FCS */ 47 48/* 49 * Packet sizes 50 * 51 * Note - lcp shouldn't be allowed to negotiate stuff outside these 52 * limits. See lcp.h in the pppd directory. 53 * (XXX - these constants should simply be shared by lcp.c instead 54 * of living in lcp.h) 55 */ 56#define PPP_MTU 1500 /* Default MTU (size of Info field) */ 57#define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN) 58#define PPP_MINMTU 64 59#define PPP_MRU 1500 /* default MRU = max length of info field */ 60#define PPP_MAXMRU 65000 /* Largest MRU we allow */ 61#define PPP_MINMRU 128 62 63#define PPP_ADDRESS(p) (((const u_char *)(p))[0]) 64#define PPP_CONTROL(p) (((const u_char *)(p))[1]) 65#define PPP_PROTOCOL(p) \ 66 ((((const u_char *)(p))[2] << 8) + ((const u_char *)(p))[3]) 67 68/* 69 * Significant octet values. 70 */ 71#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 72#define PPP_UI 0x03 /* Unnumbered Information */ 73#define PPP_FLAG 0x7e /* Flag Sequence */ 74#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 75#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 76 77/* 78 * Protocol field values. 79 */ 80#define PPP_IP 0x0021 /* Internet Protocol */ 81#define PPP_ISO 0x0023 /* ISO OSI Protocol */ 82#define PPP_XNS 0x0025 /* Xerox NS Protocol */ 83#define PPP_AT 0x0029 /* AppleTalk Protocol */ 84#define PPP_IPX 0x002b /* IPX protocol */ 85#define PPP_VJC_COMP 0x002d /* VJ compressed TCP */ 86#define PPP_VJC_UNCOMP 0x002f /* VJ uncompressed TCP */ 87#define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */ 88#define PPP_COMP 0x00fd /* compressed packet */ 89#define PPP_IPCP 0x8021 /* IP Control Protocol */ 90#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 91#define PPP_IPXCP 0x802b /* IPX Control Protocol */ 92#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 93#define PPP_CCP 0x80fd /* Compression Control Protocol */ 94#define PPP_ECP 0x8053 /* Encryption Control Protocol */ 95#define PPP_LCP 0xc021 /* Link Control Protocol */ 96#define PPP_PAP 0xc023 /* Password Authentication Protocol */ 97#define PPP_LQR 0xc025 /* Link Quality Report protocol */ 98#define PPP_CHAP 0xc223 /* Crypto Handshake Auth. Protocol */ 99#define PPP_CBCP 0xc029 /* Callback Control Protocol */ 100#define PPP_EAP 0xc227 /* Extensible Authentication Protocol */ 101 102/* 103 * Values for FCS calculations. 104 */ 105#define PPP_INITFCS 0xffff /* Initial FCS value */ 106#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 107#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) 108 109/* 110 * Extended asyncmap - allows any character to be escaped. 111 */ 112typedef uint32_t ext_accm[8]; 113 114/* 115 * What to do with network protocol (NP) packets. 116 */ 117enum NPmode { 118 NPMODE_PASS, /* pass the packet through */ 119 NPMODE_DROP, /* silently drop the packet */ 120 NPMODE_ERROR, /* return an error */ 121 NPMODE_QUEUE /* save it up for later. */ 122}; 123 124/* 125 * Statistics. 126 */ 127struct pppstat { 128 unsigned int ppp_ibytes; /* bytes received */ 129 unsigned int ppp_ipackets; /* packets received */ 130 unsigned int ppp_ierrors; /* receive errors */ 131 unsigned int ppp_obytes; /* bytes sent */ 132 unsigned int ppp_opackets; /* packets sent */ 133 unsigned int ppp_oerrors; /* transmit errors */ 134}; 135 136struct vjstat { 137 unsigned int vjs_packets; /* outbound packets */ 138 unsigned int vjs_compressed; /* outbound compressed packets */ 139 unsigned int vjs_searches; /* searches for connection state */ 140 unsigned int vjs_misses; /* times couldn't find conn. state */ 141 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ 142 unsigned int vjs_compressedin; /* inbound compressed packets */ 143 unsigned int vjs_errorin; /* inbound unknown type packets */ 144 unsigned int vjs_tossed; /* inbound packets tossed because of error */ 145}; 146 147struct ppp_stats { 148 struct pppstat p; /* basic PPP statistics */ 149 struct vjstat vj; /* VJ header compression statistics */ 150}; 151 152struct compstat { 153 unsigned int unc_bytes; /* total uncompressed bytes */ 154 unsigned int unc_packets; /* total uncompressed packets */ 155 unsigned int comp_bytes; /* compressed bytes */ 156 unsigned int comp_packets; /* compressed packets */ 157 unsigned int inc_bytes; /* incompressible bytes */ 158 unsigned int inc_packets; /* incompressible packets */ 159 unsigned int ratio; /* recent compression ratio << 8 */ 160}; 161 162struct ppp_comp_stats { 163 struct compstat c; /* packet compression statistics */ 164 struct compstat d; /* packet decompression statistics */ 165}; 166 167/* 168 * The following structure records the time in seconds since 169 * the last NP packet was sent or received. 170 */ 171struct ppp_idle { 172 time_t xmit_idle; /* time since last NP packet sent */ 173 time_t recv_idle; /* time since last NP packet received */ 174}; 175 176#endif /* !_NET_PPP_DEFS_H_ */ 177