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 * $FreeBSD: src/sys/net/ppp_defs.h,v 1.6.2.1 2001/07/03 11:01:41 ume Exp $ 28 * $DragonFly: src/sys/net/ppp_layer/ppp_defs.h,v 1.3 2003/08/26 20:49:48 rob Exp $ 29 */ 30 31 #ifndef _PPP_DEFS_H_ 32 #define _PPP_DEFS_H_ 33 34 /* 35 * The basic PPP frame. 36 */ 37 #define PPP_HDRLEN 4 /* octets for standard ppp header */ 38 #define PPP_FCSLEN 2 /* octets for FCS */ 39 #define PPP_MRU 1500 /* default MRU = max length of info field */ 40 41 #define PPP_ADDRESS(p) (((u_char *)(p))[0]) 42 #define PPP_CONTROL(p) (((u_char *)(p))[1]) 43 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3]) 44 45 /* 46 * Significant octet values. 47 */ 48 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 49 #define PPP_UI 0x03 /* Unnumbered Information */ 50 #define PPP_FLAG 0x7e /* Flag Sequence */ 51 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 52 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 53 54 /* 55 * Protocol field values. 56 */ 57 #define PPP_IP 0x21 /* Internet Protocol */ 58 #define PPP_XNS 0x25 /* Xerox NS */ 59 #define PPP_AT 0x29 /* AppleTalk Protocol */ 60 #define PPP_IPX 0x2b /* IPX Datagram (RFC1552) */ 61 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 62 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 63 #define PPP_COMP 0xfd /* compressed packet */ 64 #define PPP_IPCP 0x8021 /* IP Control Protocol */ 65 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 66 #define PPP_IPXCP 0x802b /* IPX Control Protocol (RFC1552) */ 67 #define PPP_CCP 0x80fd /* Compression Control Protocol */ 68 #define PPP_LCP 0xc021 /* Link Control Protocol */ 69 #define PPP_PAP 0xc023 /* Password Authentication Protocol */ 70 #define PPP_LQR 0xc025 /* Link Quality Report protocol */ 71 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 72 #define PPP_CBCP 0xc029 /* Callback Control Protocol */ 73 #define PPP_IPV6 0x57 /* Internet Protocol version 6*/ 74 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 75 76 /* 77 * Values for FCS calculations. 78 */ 79 #define PPP_INITFCS 0xffff /* Initial FCS value */ 80 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 81 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) 82 83 /* 84 * Extended asyncmap - allows any character to be escaped. 85 */ 86 typedef u_int32_t ext_accm[8]; 87 88 /* 89 * What to do with network protocol (NP) packets. 90 */ 91 enum NPmode { 92 NPMODE_PASS, /* pass the packet through */ 93 NPMODE_DROP, /* silently drop the packet */ 94 NPMODE_ERROR, /* return an error */ 95 NPMODE_QUEUE /* save it up for later. */ 96 }; 97 98 /* 99 * Statistics. 100 */ 101 struct pppstat { 102 unsigned int ppp_ibytes; /* bytes received */ 103 unsigned int ppp_ipackets; /* packets received */ 104 unsigned int ppp_ierrors; /* receive errors */ 105 unsigned int ppp_obytes; /* bytes sent */ 106 unsigned int ppp_opackets; /* packets sent */ 107 unsigned int ppp_oerrors; /* transmit errors */ 108 }; 109 110 struct vjstat { 111 unsigned int vjs_packets; /* outbound packets */ 112 unsigned int vjs_compressed; /* outbound compressed packets */ 113 unsigned int vjs_searches; /* searches for connection state */ 114 unsigned int vjs_misses; /* times couldn't find conn. state */ 115 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */ 116 unsigned int vjs_compressedin; /* inbound compressed packets */ 117 unsigned int vjs_errorin; /* inbound unknown type packets */ 118 unsigned int vjs_tossed; /* inbound packets tossed because of error */ 119 }; 120 121 struct ppp_stats { 122 struct pppstat p; /* basic PPP statistics */ 123 struct vjstat vj; /* VJ header compression statistics */ 124 }; 125 126 struct compstat { 127 unsigned int unc_bytes; /* total uncompressed bytes */ 128 unsigned int unc_packets; /* total uncompressed packets */ 129 unsigned int comp_bytes; /* compressed bytes */ 130 unsigned int comp_packets; /* compressed packets */ 131 unsigned int inc_bytes; /* incompressible bytes */ 132 unsigned int inc_packets; /* incompressible packets */ 133 unsigned int ratio; /* recent compression ratio << 8 */ 134 }; 135 136 struct ppp_comp_stats { 137 struct compstat c; /* packet compression statistics */ 138 struct compstat d; /* packet decompression statistics */ 139 }; 140 141 /* 142 * The following structure records the time in seconds since 143 * the last NP packet was sent or received. 144 */ 145 struct ppp_idle { 146 time_t xmit_idle; /* time since last NP packet sent */ 147 time_t recv_idle; /* time since last NP packet received */ 148 }; 149 150 151 #endif /* _PPP_DEFS_H_ */ 152