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 /* 29 * ==FILEVERSION 20000114== 30 * 31 * NOTE TO MAINTAINERS: 32 * If you modify this file at all, please set the above date. 33 * ppp_defs.h is shipped with a PPP distribution as well as with the kernel; 34 * if everyone increases the FILEVERSION number above, then scripts 35 * can do the right thing when deciding whether to install a new ppp_defs.h 36 * file. Don't change the format of that line otherwise, so the 37 * installation script can recognize it. 38 */ 39 40 #ifndef _PPP_DEFS_H_ 41 #define _PPP_DEFS_H_ 42 43 /* 44 * The basic PPP frame. 45 */ 46 #define PPP_HDRLEN 4 /* octets for standard ppp header */ 47 #define PPP_FCSLEN 2 /* octets for FCS */ 48 #define PPP_MRU 1500 /* default MRU = max length of info field */ 49 50 #define PPP_ADDRESS(p) (((__u8 *)(p))[0]) 51 #define PPP_CONTROL(p) (((__u8 *)(p))[1]) 52 #define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3]) 53 54 /* 55 * Significant octet values. 56 */ 57 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 58 #define PPP_UI 0x03 /* Unnumbered Information */ 59 #define PPP_FLAG 0x7e /* Flag Sequence */ 60 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 61 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 62 63 /* 64 * Protocol field values. 65 */ 66 #define PPP_IP 0x21 /* Internet Protocol */ 67 #define PPP_AT 0x29 /* AppleTalk Protocol */ 68 #define PPP_IPX 0x2b /* IPX protocol */ 69 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 70 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 71 #define PPP_MP 0x3d /* Multilink protocol */ 72 #define PPP_IPV6 0x57 /* Internet Protocol Version 6 */ 73 #define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */ 74 #define PPP_COMP 0xfd /* compressed packet */ 75 #define PPP_MPLS_UC 0x0281 /* Multi Protocol Label Switching - Unicast */ 76 #define PPP_MPLS_MC 0x0283 /* Multi Protocol Label Switching - Multicast */ 77 #define PPP_IPCP 0x8021 /* IP Control Protocol */ 78 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 79 #define PPP_IPXCP 0x802b /* IPX Control Protocol */ 80 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 81 #define PPP_CCPFRAG 0x80fb /* CCP at link level (below MP bundle) */ 82 #define PPP_CCP 0x80fd /* Compression Control Protocol */ 83 #define PPP_MPLSCP 0x80fd /* MPLS Control Protocol */ 84 #define PPP_LCP 0xc021 /* Link Control Protocol */ 85 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 86 #define PPP_LQR 0xc025 /* Link Quality Report protocol */ 87 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 88 #define PPP_CBCP 0xc029 /* Callback Control Protocol */ 89 90 /* 91 * Values for FCS calculations. 92 */ 93 94 #define PPP_INITFCS 0xffff /* Initial FCS value */ 95 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 96 97 #ifdef __KERNEL__ 98 #include <linux/crc-ccitt.h> 99 #define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c) 100 #endif 101 102 /* 103 * Extended asyncmap - allows any character to be escaped. 104 */ 105 106 typedef __u32 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 for LQRP and pppstats 120 */ 121 struct pppstat { 122 __u32 ppp_discards; /* # frames discarded */ 123 124 __u32 ppp_ibytes; /* bytes received */ 125 __u32 ppp_ioctects; /* bytes received not in error */ 126 __u32 ppp_ipackets; /* packets received */ 127 __u32 ppp_ierrors; /* receive errors */ 128 __u32 ppp_ilqrs; /* # LQR frames received */ 129 130 __u32 ppp_obytes; /* raw bytes sent */ 131 __u32 ppp_ooctects; /* frame bytes sent */ 132 __u32 ppp_opackets; /* packets sent */ 133 __u32 ppp_oerrors; /* transmit errors */ 134 __u32 ppp_olqrs; /* # LQR frames sent */ 135 }; 136 137 struct vjstat { 138 __u32 vjs_packets; /* outbound packets */ 139 __u32 vjs_compressed; /* outbound compressed packets */ 140 __u32 vjs_searches; /* searches for connection state */ 141 __u32 vjs_misses; /* times couldn't find conn. state */ 142 __u32 vjs_uncompressedin; /* inbound uncompressed packets */ 143 __u32 vjs_compressedin; /* inbound compressed packets */ 144 __u32 vjs_errorin; /* inbound unknown type packets */ 145 __u32 vjs_tossed; /* inbound packets tossed because of error */ 146 }; 147 148 struct compstat { 149 __u32 unc_bytes; /* total uncompressed bytes */ 150 __u32 unc_packets; /* total uncompressed packets */ 151 __u32 comp_bytes; /* compressed bytes */ 152 __u32 comp_packets; /* compressed packets */ 153 __u32 inc_bytes; /* incompressible bytes */ 154 __u32 inc_packets; /* incompressible packets */ 155 156 /* the compression ratio is defined as in_count / bytes_out */ 157 __u32 in_count; /* Bytes received */ 158 __u32 bytes_out; /* Bytes transmitted */ 159 160 double ratio; /* not computed in kernel. */ 161 }; 162 163 struct ppp_stats { 164 struct pppstat p; /* basic PPP statistics */ 165 struct vjstat vj; /* VJ header compression statistics */ 166 }; 167 168 struct ppp_comp_stats { 169 struct compstat c; /* packet compression statistics */ 170 struct compstat d; /* packet decompression statistics */ 171 }; 172 173 /* 174 * The following structure records the time in seconds since 175 * the last NP packet was sent or received. 176 */ 177 struct ppp_idle { 178 time_t xmit_idle; /* time since last NP packet sent */ 179 time_t recv_idle; /* time since last NP packet received */ 180 }; 181 182 #endif /* _PPP_DEFS_H_ */ 183