1 /* $Id: ppp_defs.h,v 1.17 2002/12/06 09:49:15 paulus Exp $ */ 2 3 /* 4 * ppp_defs.h - PPP definitions. 5 * 6 * Copyright (c) 1984 Paul Mackerras. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. The name(s) of the authors of this software must not be used to 21 * endorse or promote products derived from this software without 22 * prior written permission. 23 * 24 * 4. Redistributions of any form whatsoever must retain the following 25 * acknowledgment: 26 * "This product includes software developed by Paul Mackerras 27 * <paulus@samba.org>". 28 * 29 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO 30 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 31 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY 32 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 33 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 34 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 35 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 36 */ 37 38 #ifndef _PPP_DEFS_H_ 39 #define _PPP_DEFS_H_ 40 41 /* 42 * The basic PPP frame. 43 */ 44 #define PPP_HDRLEN 4 /* octets for standard ppp header */ 45 #define PPP_FCSLEN 2 /* octets for FCS */ 46 47 /* 48 * Packet sizes 49 * 50 * Note - lcp shouldn't be allowed to negotiate stuff outside these 51 * limits. See lcp.h in the pppd directory. 52 * (XXX - these constants should simply be shared by lcp.c instead 53 * of living in lcp.h) 54 */ 55 #define PPP_MTU 1500 /* Default MTU (size of Info field) */ 56 #define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN) 57 #define PPP_MINMTU 64 58 #define PPP_MRU 1500 /* default MRU = max length of info field */ 59 #define PPP_MAXMRU 65000 /* Largest MRU we allow */ 60 #define PPP_MINMRU 128 61 62 #define PPP_ADDRESS(p) (((u_char *)(p))[0]) 63 #define PPP_CONTROL(p) (((u_char *)(p))[1]) 64 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3]) 65 66 /* 67 * Significant octet values. 68 */ 69 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 70 #define PPP_UI 0x03 /* Unnumbered Information */ 71 #define PPP_FLAG 0x7e /* Flag Sequence */ 72 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 73 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 74 75 /* 76 * Protocol field values. 77 */ 78 #define PPP_IP 0x21 /* Internet Protocol */ 79 #define PPP_AT 0x29 /* AppleTalk Protocol */ 80 #define PPP_IPX 0x2b /* IPX protocol */ 81 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 82 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 83 #define PPP_IPV6 0x57 /* Internet Protocol Version 6 */ 84 #define PPP_COMP 0xfd /* compressed packet */ 85 #define PPP_IPCP 0x8021 /* IP Control Protocol */ 86 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 87 #define PPP_IPXCP 0x802b /* IPX Control Protocol */ 88 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 89 #define PPP_CCP 0x80fd /* Compression Control Protocol */ 90 #define PPP_ECP 0x8053 /* Encryption Control Protocol */ 91 #define PPP_LCP 0xc021 /* Link Control Protocol */ 92 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 93 #define PPP_LQR 0xc025 /* Link Quality Report protocol */ 94 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 95 #define PPP_CBCP 0xc029 /* Callback Control Protocol */ 96 #define PPP_EAP 0xc227 /* Extensible Authentication Protocol */ 97 98 /* 99 * Values for FCS calculations. 100 */ 101 #define PPP_INITFCS 0xffff /* Initial FCS value */ 102 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 103 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) 104 105 /* 106 * A 32-bit unsigned integral type. 107 */ 108 109 #if !defined(__BIT_TYPES_DEFINED__) && !defined(_BITYPES) \ 110 && !defined(__FreeBSD__) && (NS_TARGET < 40) 111 #ifdef UINT32_T 112 typedef UINT32_T u_int32_t; 113 #else 114 typedef unsigned int u_int32_t; 115 typedef unsigned short u_int16_t; 116 #endif 117 #endif 118 119 /* 120 * Extended asyncmap - allows any character to be escaped. 121 */ 122 typedef u_int32_t ext_accm[8]; 123 124 /* 125 * What to do with network protocol (NP) packets. 126 */ 127 enum NPmode { 128 NPMODE_PASS, /* pass the packet through */ 129 NPMODE_DROP, /* silently drop the packet */ 130 NPMODE_ERROR, /* return an error */ 131 NPMODE_QUEUE /* save it up for later. */ 132 }; 133 134 /* 135 * Statistics. 136 */ 137 struct pppstat { 138 unsigned int ppp_ibytes; /* bytes received */ 139 unsigned int ppp_ipackets; /* packets received */ 140 unsigned int ppp_ierrors; /* receive errors */ 141 unsigned int ppp_obytes; /* bytes sent */ 142 unsigned int ppp_opackets; /* packets sent */ 143 unsigned int ppp_oerrors; /* transmit errors */ 144 }; 145 146 struct vjstat { 147 unsigned int vjs_packets; /* outbound packets */ 148 unsigned int vjs_compressed; /* outbound compressed packets */ 149 unsigned int vjs_searches; /* searches for connection state */ 150 unsigned int vjs_misses; /* times couldn't find conn. state */ 151 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ 152 unsigned int vjs_compressedin; /* inbound compressed packets */ 153 unsigned int vjs_errorin; /* inbound unknown type packets */ 154 unsigned int vjs_tossed; /* inbound packets tossed because of error */ 155 }; 156 157 struct ppp_stats { 158 struct pppstat p; /* basic PPP statistics */ 159 struct vjstat vj; /* VJ header compression statistics */ 160 }; 161 162 struct compstat { 163 unsigned int unc_bytes; /* total uncompressed bytes */ 164 unsigned int unc_packets; /* total uncompressed packets */ 165 unsigned int comp_bytes; /* compressed bytes */ 166 unsigned int comp_packets; /* compressed packets */ 167 unsigned int inc_bytes; /* incompressible bytes */ 168 unsigned int inc_packets; /* incompressible packets */ 169 unsigned int ratio; /* recent compression ratio << 8 */ 170 }; 171 172 struct ppp_comp_stats { 173 struct compstat c; /* packet compression statistics */ 174 struct compstat d; /* packet decompression statistics */ 175 }; 176 177 /* 178 * The following structure records the time in seconds since 179 * the last NP packet was sent or received. 180 */ 181 struct ppp_idle { 182 time_t xmit_idle; /* time since last NP packet sent */ 183 time_t recv_idle; /* time since last NP packet received */ 184 }; 185 186 #ifndef __P 187 #ifdef __STDC__ 188 #define __P(x) x 189 #else 190 #define __P(x) () 191 #endif 192 #endif 193 194 #endif /* _PPP_DEFS_H_ */ 195