1/* 2 * ppp_defs.h - PPP definitions. 3 * 4 * Copyright (c) 1994 The Australian National University. 5 * All rights reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software and its 8 * documentation is hereby granted, provided that the above copyright 9 * notice appears in all copies. This software is provided without any 10 * warranty, express or implied. The Australian National University 11 * makes no representations about the suitability of this software for 12 * any purpose. 13 * 14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY 15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF 17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY 18 * OF SUCH DAMAGE. 19 * 20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, 21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO 24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 25 * OR MODIFICATIONS. 26 */ 27 28#include <linux/types.h> 29 30/* 31 * ==FILEVERSION 20000114== 32 * 33 * NOTE TO MAINTAINERS: 34 * If you modify this file at all, please set the above date. 35 * ppp_defs.h is shipped with a PPP distribution as well as with the kernel; 36 * if everyone increases the FILEVERSION number above, then scripts 37 * can do the right thing when deciding whether to install a new ppp_defs.h 38 * file. Don't change the format of that line otherwise, so the 39 * installation script can recognize it. 40 */ 41 42#ifndef _PPP_DEFS_H_ 43#define _PPP_DEFS_H_ 44 45/* 46 * The basic PPP frame. 47 */ 48#define PPP_HDRLEN 4 /* octets for standard ppp header */ 49#define PPP_FCSLEN 2 /* octets for FCS */ 50#define PPP_MRU 1500 /* default MRU = max length of info field */ 51 52#define PPP_ADDRESS(p) (((__u8 *)(p))[0]) 53#define PPP_CONTROL(p) (((__u8 *)(p))[1]) 54#define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3]) 55 56/* 57 * Significant octet values. 58 */ 59#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 60#define PPP_UI 0x03 /* Unnumbered Information */ 61#define PPP_FLAG 0x7e /* Flag Sequence */ 62#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 63#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 64 65/* 66 * Protocol field values. 67 */ 68#define PPP_IP 0x21 /* Internet Protocol */ 69#define PPP_AT 0x29 /* AppleTalk Protocol */ 70#define PPP_IPX 0x2b /* IPX protocol */ 71#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 72#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 73#define PPP_MP 0x3d /* Multilink protocol */ 74#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */ 75#define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */ 76#define PPP_COMP 0xfd /* compressed packet */ 77#define PPP_MPLS_UC 0x0281 /* Multi Protocol Label Switching - Unicast */ 78#define PPP_MPLS_MC 0x0283 /* Multi Protocol Label Switching - Multicast */ 79#define PPP_IPCP 0x8021 /* IP Control Protocol */ 80#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 81#define PPP_IPXCP 0x802b /* IPX Control Protocol */ 82#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 83#define PPP_CCPFRAG 0x80fb /* CCP at link level (below MP bundle) */ 84#define PPP_CCP 0x80fd /* Compression Control Protocol */ 85#define PPP_MPLSCP 0x80fd /* MPLS Control Protocol */ 86#define PPP_LCP 0xc021 /* Link Control Protocol */ 87#define PPP_PAP 0xc023 /* Password Authentication Protocol */ 88#define PPP_LQR 0xc025 /* Link Quality Report protocol */ 89#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 90#define PPP_CBCP 0xc029 /* Callback Control Protocol */ 91 92/* 93 * Values for FCS calculations. 94 */ 95 96#define PPP_INITFCS 0xffff /* Initial FCS value */ 97#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 98 99#ifdef __KERNEL__ 100#include <linux/crc-ccitt.h> 101#define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c) 102#endif 103 104/* 105 * Extended asyncmap - allows any character to be escaped. 106 */ 107 108typedef __u32 ext_accm[8]; 109 110/* 111 * What to do with network protocol (NP) packets. 112 */ 113enum NPmode { 114 NPMODE_PASS, /* pass the packet through */ 115 NPMODE_DROP, /* silently drop the packet */ 116 NPMODE_ERROR, /* return an error */ 117 NPMODE_QUEUE /* save it up for later. */ 118}; 119 120/* 121 * Statistics for LQRP and pppstats 122 */ 123struct pppstat { 124 __u32 ppp_discards; /* # frames discarded */ 125 126 __u32 ppp_ibytes; /* bytes received */ 127 __u32 ppp_ioctects; /* bytes received not in error */ 128 __u32 ppp_ipackets; /* packets received */ 129 __u32 ppp_ierrors; /* receive errors */ 130 __u32 ppp_ilqrs; /* # LQR frames received */ 131 132 __u32 ppp_obytes; /* raw bytes sent */ 133 __u32 ppp_ooctects; /* frame bytes sent */ 134 __u32 ppp_opackets; /* packets sent */ 135 __u32 ppp_oerrors; /* transmit errors */ 136 __u32 ppp_olqrs; /* # LQR frames sent */ 137}; 138 139struct vjstat { 140 __u32 vjs_packets; /* outbound packets */ 141 __u32 vjs_compressed; /* outbound compressed packets */ 142 __u32 vjs_searches; /* searches for connection state */ 143 __u32 vjs_misses; /* times couldn't find conn. state */ 144 __u32 vjs_uncompressedin; /* inbound uncompressed packets */ 145 __u32 vjs_compressedin; /* inbound compressed packets */ 146 __u32 vjs_errorin; /* inbound unknown type packets */ 147 __u32 vjs_tossed; /* inbound packets tossed because of error */ 148}; 149 150struct compstat { 151 __u32 unc_bytes; /* total uncompressed bytes */ 152 __u32 unc_packets; /* total uncompressed packets */ 153 __u32 comp_bytes; /* compressed bytes */ 154 __u32 comp_packets; /* compressed packets */ 155 __u32 inc_bytes; /* incompressible bytes */ 156 __u32 inc_packets; /* incompressible packets */ 157 158 /* the compression ratio is defined as in_count / bytes_out */ 159 __u32 in_count; /* Bytes received */ 160 __u32 bytes_out; /* Bytes transmitted */ 161 162 double ratio; /* not computed in kernel. */ 163}; 164 165struct ppp_stats { 166 struct pppstat p; /* basic PPP statistics */ 167 struct vjstat vj; /* VJ header compression statistics */ 168}; 169 170struct ppp_comp_stats { 171 struct compstat c; /* packet compression statistics */ 172 struct compstat d; /* packet decompression statistics */ 173}; 174 175/* 176 * The following structure records the time in seconds since 177 * the last NP packet was sent or received. 178 */ 179struct ppp_idle { 180 __kernel_time_t xmit_idle; /* time since last NP packet sent */ 181 __kernel_time_t recv_idle; /* time since last NP packet received */ 182}; 183 184#endif /* _PPP_DEFS_H_ */ 185