1 /* 2 * ppp_defs.h - PPP definitions. 3 */ 4 /*- 5 * Copyright (c) 1994 The Australian National University. 6 * All rights reserved. 7 * 8 * Permission to use, copy, modify, and distribute this software and its 9 * documentation is hereby granted, provided that the above copyright 10 * notice appears in all copies. This software is provided without any 11 * warranty, express or implied. The Australian National University 12 * makes no representations about the suitability of this software for 13 * any purpose. 14 * 15 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY 16 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 17 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF 18 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY 19 * OF SUCH DAMAGE. 20 * 21 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, 22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 23 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 24 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO 25 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 26 * OR MODIFICATIONS. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _PPP_DEFS_H_ 32 #define _PPP_DEFS_H_ 33 34 #include <sys/_types.h> 35 36 /* 37 * The basic PPP frame. 38 */ 39 #define PPP_HDRLEN 4 /* octets for standard ppp header */ 40 #define PPP_FCSLEN 2 /* octets for FCS */ 41 #define PPP_MRU 1500 /* default MRU = max length of info field */ 42 43 #define PPP_ADDRESS(p) (((u_char *)(p))[0]) 44 #define PPP_CONTROL(p) (((u_char *)(p))[1]) 45 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3]) 46 47 /* 48 * Significant octet values. 49 */ 50 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 51 #define PPP_UI 0x03 /* Unnumbered Information */ 52 #define PPP_FLAG 0x7e /* Flag Sequence */ 53 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 54 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 55 56 /* 57 * Protocol field values. 58 */ 59 #define PPP_IP 0x21 /* Internet Protocol */ 60 #define PPP_XNS 0x25 /* Xerox NS */ 61 #define PPP_AT 0x29 /* AppleTalk Protocol */ 62 #define PPP_IPX 0x2b /* IPX Datagram (RFC1552) */ 63 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 64 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 65 #define PPP_COMP 0xfd /* compressed packet */ 66 #define PPP_IPCP 0x8021 /* IP Control Protocol */ 67 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 68 #define PPP_IPXCP 0x802b /* IPX Control Protocol (RFC1552) */ 69 #define PPP_CCP 0x80fd /* Compression Control Protocol */ 70 #define PPP_LCP 0xc021 /* Link Control Protocol */ 71 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 72 #define PPP_LQR 0xc025 /* Link Quality Report protocol */ 73 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 74 #define PPP_CBCP 0xc029 /* Callback Control Protocol */ 75 #define PPP_IPV6 0x57 /* Internet Protocol version 6*/ 76 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 77 78 /* 79 * Values for FCS calculations. 80 */ 81 #define PPP_INITFCS 0xffff /* Initial FCS value */ 82 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 83 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) 84 85 /* 86 * Extended asyncmap - allows any character to be escaped. 87 */ 88 typedef __uint32_t ext_accm[8]; 89 90 /* 91 * What to do with network protocol (NP) packets. 92 */ 93 enum NPmode { 94 NPMODE_PASS, /* pass the packet through */ 95 NPMODE_DROP, /* silently drop the packet */ 96 NPMODE_ERROR, /* return an error */ 97 NPMODE_QUEUE /* save it up for later. */ 98 }; 99 100 /* 101 * Statistics. 102 */ 103 struct pppstat { 104 unsigned int ppp_ibytes; /* bytes received */ 105 unsigned int ppp_ipackets; /* packets received */ 106 unsigned int ppp_ierrors; /* receive errors */ 107 unsigned int ppp_obytes; /* bytes sent */ 108 unsigned int ppp_opackets; /* packets sent */ 109 unsigned int ppp_oerrors; /* transmit errors */ 110 }; 111 112 struct vjstat { 113 unsigned int vjs_packets; /* outbound packets */ 114 unsigned int vjs_compressed; /* outbound compressed packets */ 115 unsigned int vjs_searches; /* searches for connection state */ 116 unsigned int vjs_misses; /* times couldn't find conn. state */ 117 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ 118 unsigned int vjs_compressedin; /* inbound compressed packets */ 119 unsigned int vjs_errorin; /* inbound unknown type packets */ 120 unsigned int vjs_tossed; /* inbound packets tossed because of error */ 121 }; 122 123 struct ppp_stats { 124 struct pppstat p; /* basic PPP statistics */ 125 struct vjstat vj; /* VJ header compression statistics */ 126 }; 127 128 struct compstat { 129 unsigned int unc_bytes; /* total uncompressed bytes */ 130 unsigned int unc_packets; /* total uncompressed packets */ 131 unsigned int comp_bytes; /* compressed bytes */ 132 unsigned int comp_packets; /* compressed packets */ 133 unsigned int inc_bytes; /* incompressible bytes */ 134 unsigned int inc_packets; /* incompressible packets */ 135 unsigned int ratio; /* recent compression ratio << 8 */ 136 }; 137 138 struct ppp_comp_stats { 139 struct compstat c; /* packet compression statistics */ 140 struct compstat d; /* packet decompression statistics */ 141 }; 142 143 /* 144 * The following structure records the time in seconds since 145 * the last NP packet was sent or received. 146 */ 147 struct ppp_idle { 148 __time_t xmit_idle; /* time since last NP packet sent */ 149 __time_t recv_idle; /* time since last NP packet received */ 150 }; 151 152 #ifndef __P 153 #ifdef __STDC__ 154 #define __P(x) x 155 #else 156 #define __P(x) () 157 #endif 158 #endif 159 160 #endif /* _PPP_DEFS_H_ */ 161