1 /* $NetBSD: ppp_defs.h,v 1.14 2020/04/04 19:46:01 is 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_MP 0x003d /* Multilink PPP Fragment */ 88 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */ 89 #define PPP_COMP 0x00fd /* compressed packet */ 90 #define PPP_IPCP 0x8021 /* IP Control Protocol */ 91 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 92 #define PPP_IPXCP 0x802b /* IPX Control Protocol */ 93 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 94 #define PPP_CCP 0x80fd /* Compression Control Protocol */ 95 #define PPP_ECP 0x8053 /* Encryption Control Protocol */ 96 #define PPP_LCP 0xc021 /* Link Control Protocol */ 97 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 98 #define PPP_LQR 0xc025 /* Link Quality Report protocol */ 99 #define PPP_CHAP 0xc223 /* Crypto Handshake Auth. Protocol */ 100 #define PPP_CBCP 0xc029 /* Callback Control Protocol */ 101 #define PPP_EAP 0xc227 /* Extensible Authentication Protocol */ 102 103 /* 104 * Values for FCS calculations. 105 */ 106 #define PPP_INITFCS 0xffff /* Initial FCS value */ 107 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 108 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) 109 110 /* 111 * Extended asyncmap - allows any character to be escaped. 112 */ 113 typedef uint32_t ext_accm[8]; 114 115 /* 116 * What to do with network protocol (NP) packets. 117 */ 118 enum NPmode { 119 NPMODE_PASS, /* pass the packet through */ 120 NPMODE_DROP, /* silently drop the packet */ 121 NPMODE_ERROR, /* return an error */ 122 NPMODE_QUEUE /* save it up for later. */ 123 }; 124 125 /* 126 * Statistics. 127 */ 128 struct pppstat { 129 unsigned int ppp_ibytes; /* bytes received */ 130 unsigned int ppp_ipackets; /* packets received */ 131 unsigned int ppp_ierrors; /* receive errors */ 132 unsigned int ppp_obytes; /* bytes sent */ 133 unsigned int ppp_opackets; /* packets sent */ 134 unsigned int ppp_oerrors; /* transmit errors */ 135 }; 136 137 struct vjstat { 138 unsigned int vjs_packets; /* outbound packets */ 139 unsigned int vjs_compressed; /* outbound compressed packets */ 140 unsigned int vjs_searches; /* searches for connection state */ 141 unsigned int vjs_misses; /* times couldn't find conn. state */ 142 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ 143 unsigned int vjs_compressedin; /* inbound compressed packets */ 144 unsigned int vjs_errorin; /* inbound unknown type packets */ 145 unsigned int vjs_tossed; /* inbound packets tossed because of error */ 146 }; 147 148 struct ppp_stats { 149 struct pppstat p; /* basic PPP statistics */ 150 struct vjstat vj; /* VJ header compression statistics */ 151 }; 152 153 struct compstat { 154 unsigned int unc_bytes; /* total uncompressed bytes */ 155 unsigned int unc_packets; /* total uncompressed packets */ 156 unsigned int comp_bytes; /* compressed bytes */ 157 unsigned int comp_packets; /* compressed packets */ 158 unsigned int inc_bytes; /* incompressible bytes */ 159 unsigned int inc_packets; /* incompressible packets */ 160 unsigned int ratio; /* recent compression ratio << 8 */ 161 }; 162 163 struct ppp_comp_stats { 164 struct compstat c; /* packet compression statistics */ 165 struct compstat d; /* packet decompression statistics */ 166 }; 167 168 /* 169 * The following structure records the time in seconds since 170 * the last NP packet was sent or received. 171 */ 172 struct ppp_idle { 173 time_t xmit_idle; /* time since last NP packet sent */ 174 time_t recv_idle; /* time since last NP packet received */ 175 }; 176 177 #endif /* !_NET_PPP_DEFS_H_ */ 178