ppp_defs.h revision 1.3
1 /* $NetBSD: ppp_defs.h,v 1.3 1997/05/17 21:12:08 christos 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) 1994 The Australian National University. 8 * All rights reserved. 9 * 10 * Permission to use, copy, modify, and distribute this software and its 11 * documentation is hereby granted, provided that the above copyright 12 * notice appears in all copies. This software is provided without any 13 * warranty, express or implied. The Australian National University 14 * makes no representations about the suitability of this software for 15 * any purpose. 16 * 17 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY 18 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 19 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF 20 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY 21 * OF SUCH DAMAGE. 22 * 23 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, 24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 25 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 26 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO 27 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 28 * OR MODIFICATIONS. 29 */ 30 31 #ifndef _PPP_DEFS_H_ 32 #define _PPP_DEFS_H_ 33 34 /* 35 * The basic PPP frame. 36 */ 37 #define PPP_HDRLEN 4 /* octets for standard ppp header */ 38 #define PPP_FCSLEN 2 /* octets for FCS */ 39 40 /* 41 * Packet sizes 42 * 43 * Note - lcp shouldn't be allowed to negotiate stuff outside these 44 * limits. See lcp.h in the pppd directory. 45 * (XXX - these constants should simply be shared by lcp.c instead 46 * of living in lcp.h) 47 */ 48 #define PPP_MTU 1500 /* Default MTU (size of Info field) */ 49 #define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN) 50 #define PPP_MINMTU 64 51 #define PPP_MRU 1500 /* default MRU = max length of info field */ 52 #define PPP_MAXMRU 65000 /* Largest MRU we allow */ 53 #define PPP_MINMRU 128 54 55 #define PPP_ADDRESS(p) (((u_char *)(p))[0]) 56 #define PPP_CONTROL(p) (((u_char *)(p))[1]) 57 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3]) 58 59 /* 60 * Significant octet values. 61 */ 62 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 63 #define PPP_UI 0x03 /* Unnumbered Information */ 64 #define PPP_FLAG 0x7e /* Flag Sequence */ 65 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 66 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 67 68 /* 69 * Protocol field values. 70 */ 71 #define PPP_IP 0x21 /* Internet Protocol */ 72 #define PPP_AT 0x29 /* AppleTalk Protocol */ 73 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 74 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 75 #define PPP_COMP 0xfd /* compressed packet */ 76 #define PPP_IPCP 0x8021 /* IP Control Protocol */ 77 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 78 #define PPP_CCP 0x80fd /* Compression Control Protocol */ 79 #define PPP_LCP 0xc021 /* Link Control Protocol */ 80 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 81 #define PPP_LQR 0xc025 /* Link Quality Report protocol */ 82 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 83 #define PPP_CBCP 0xc029 /* Callback Control Protocol */ 84 85 /* 86 * Values for FCS calculations. 87 */ 88 #define PPP_INITFCS 0xffff /* Initial FCS value */ 89 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 90 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) 91 92 /* 93 * A 32-bit unsigned integral type. 94 */ 95 #if !defined(__BIT_TYPES_DEFINED__) && !defined(_BITYPES) && !defined(__FreeBSD__) 96 #ifdef UINT32_T 97 typedef UINT32_T u_int32_t; 98 #else 99 typedef unsigned int u_int32_t; 100 #endif 101 #endif 102 103 /* 104 * Extended asyncmap - allows any character to be escaped. 105 */ 106 typedef u_int32_t ext_accm[8]; 107 108 /* 109 * What to do with network protocol (NP) packets. 110 */ 111 enum NPmode { 112 NPMODE_PASS, /* pass the packet through */ 113 NPMODE_DROP, /* silently drop the packet */ 114 NPMODE_ERROR, /* return an error */ 115 NPMODE_QUEUE /* save it up for later. */ 116 }; 117 118 /* 119 * Statistics. 120 */ 121 struct pppstat { 122 unsigned int ppp_ibytes; /* bytes received */ 123 unsigned int ppp_ipackets; /* packets received */ 124 unsigned int ppp_ierrors; /* receive errors */ 125 unsigned int ppp_obytes; /* bytes sent */ 126 unsigned int ppp_opackets; /* packets sent */ 127 unsigned int ppp_oerrors; /* transmit errors */ 128 }; 129 130 struct vjstat { 131 unsigned int vjs_packets; /* outbound packets */ 132 unsigned int vjs_compressed; /* outbound compressed packets */ 133 unsigned int vjs_searches; /* searches for connection state */ 134 unsigned int vjs_misses; /* times couldn't find conn. state */ 135 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ 136 unsigned int vjs_compressedin; /* inbound compressed packets */ 137 unsigned int vjs_errorin; /* inbound unknown type packets */ 138 unsigned int vjs_tossed; /* inbound packets tossed because of error */ 139 }; 140 141 struct ppp_stats { 142 struct pppstat p; /* basic PPP statistics */ 143 struct vjstat vj; /* VJ header compression statistics */ 144 }; 145 146 struct compstat { 147 unsigned int unc_bytes; /* total uncompressed bytes */ 148 unsigned int unc_packets; /* total uncompressed packets */ 149 unsigned int comp_bytes; /* compressed bytes */ 150 unsigned int comp_packets; /* compressed packets */ 151 unsigned int inc_bytes; /* incompressible bytes */ 152 unsigned int inc_packets; /* incompressible packets */ 153 unsigned int ratio; /* recent compression ratio << 8 */ 154 }; 155 156 struct ppp_comp_stats { 157 struct compstat c; /* packet compression statistics */ 158 struct compstat d; /* packet decompression statistics */ 159 }; 160 161 /* 162 * The following structure records the time in seconds since 163 * the last NP packet was sent or received. 164 */ 165 struct ppp_idle { 166 time_t xmit_idle; /* time since last NP packet sent */ 167 time_t recv_idle; /* time since last NP packet received */ 168 }; 169 170 #ifndef __P 171 #ifdef __STDC__ 172 #define __P(x) x 173 #else 174 #define __P(x) () 175 #endif 176 #endif 177 178 #endif /* _PPP_DEFS_H_ */ 179
Indexes created Mon Sep 29 21:09:56 GMT 2025