1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2/* 3 * ppp_defs.h - PPP definitions. 4 * 5 * Copyright 1994-2000 Paul Mackerras. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 */ 11#include <linux/types.h> 12 13#ifndef _UAPI_PPP_DEFS_H_ 14#define _UAPI_PPP_DEFS_H_ 15 16/* 17 * The basic PPP frame. 18 */ 19#define PPP_HDRLEN 4 /* octets for standard ppp header */ 20#define PPP_FCSLEN 2 /* octets for FCS */ 21#define PPP_MRU 1500 /* default MRU = max length of info field */ 22 23#define PPP_ADDRESS(p) (((__u8 *)(p))[0]) 24#define PPP_CONTROL(p) (((__u8 *)(p))[1]) 25#define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3]) 26 27/* 28 * Significant octet values. 29 */ 30#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 31#define PPP_UI 0x03 /* Unnumbered Information */ 32#define PPP_FLAG 0x7e /* Flag Sequence */ 33#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */ 34#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */ 35 36/* 37 * Protocol field values. 38 */ 39#define PPP_IP 0x21 /* Internet Protocol */ 40#define PPP_AT 0x29 /* AppleTalk Protocol */ 41#define PPP_IPX 0x2b /* IPX protocol */ 42#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */ 43#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */ 44#define PPP_MP 0x3d /* Multilink protocol */ 45#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */ 46#define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */ 47#define PPP_COMP 0xfd /* compressed packet */ 48#define PPP_MPLS_UC 0x0281 /* Multi Protocol Label Switching - Unicast */ 49#define PPP_MPLS_MC 0x0283 /* Multi Protocol Label Switching - Multicast */ 50#define PPP_IPCP 0x8021 /* IP Control Protocol */ 51#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */ 52#define PPP_IPXCP 0x802b /* IPX Control Protocol */ 53#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 54#define PPP_CCPFRAG 0x80fb /* CCP at link level (below MP bundle) */ 55#define PPP_CCP 0x80fd /* Compression Control Protocol */ 56#define PPP_MPLSCP 0x80fd /* MPLS Control Protocol */ 57#define PPP_LCP 0xc021 /* Link Control Protocol */ 58#define PPP_PAP 0xc023 /* Password Authentication Protocol */ 59#define PPP_LQR 0xc025 /* Link Quality Report protocol */ 60#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */ 61#define PPP_CBCP 0xc029 /* Callback Control Protocol */ 62 63/* 64 * Values for FCS calculations. 65 */ 66 67#define PPP_INITFCS 0xffff /* Initial FCS value */ 68#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */ 69 70 71/* 72 * Extended asyncmap - allows any character to be escaped. 73 */ 74 75typedef __u32 ext_accm[8]; 76 77/* 78 * What to do with network protocol (NP) packets. 79 */ 80enum NPmode { 81 NPMODE_PASS, /* pass the packet through */ 82 NPMODE_DROP, /* silently drop the packet */ 83 NPMODE_ERROR, /* return an error */ 84 NPMODE_QUEUE /* save it up for later. */ 85}; 86 87/* 88 * Statistics for LQRP and pppstats 89 */ 90struct pppstat { 91 __u32 ppp_discards; /* # frames discarded */ 92 93 __u32 ppp_ibytes; /* bytes received */ 94 __u32 ppp_ioctects; /* bytes received not in error */ 95 __u32 ppp_ipackets; /* packets received */ 96 __u32 ppp_ierrors; /* receive errors */ 97 __u32 ppp_ilqrs; /* # LQR frames received */ 98 99 __u32 ppp_obytes; /* raw bytes sent */ 100 __u32 ppp_ooctects; /* frame bytes sent */ 101 __u32 ppp_opackets; /* packets sent */ 102 __u32 ppp_oerrors; /* transmit errors */ 103 __u32 ppp_olqrs; /* # LQR frames sent */ 104}; 105 106struct vjstat { 107 __u32 vjs_packets; /* outbound packets */ 108 __u32 vjs_compressed; /* outbound compressed packets */ 109 __u32 vjs_searches; /* searches for connection state */ 110 __u32 vjs_misses; /* times couldn't find conn. state */ 111 __u32 vjs_uncompressedin; /* inbound uncompressed packets */ 112 __u32 vjs_compressedin; /* inbound compressed packets */ 113 __u32 vjs_errorin; /* inbound unknown type packets */ 114 __u32 vjs_tossed; /* inbound packets tossed because of error */ 115}; 116 117struct compstat { 118 __u32 unc_bytes; /* total uncompressed bytes */ 119 __u32 unc_packets; /* total uncompressed packets */ 120 __u32 comp_bytes; /* compressed bytes */ 121 __u32 comp_packets; /* compressed packets */ 122 __u32 inc_bytes; /* incompressible bytes */ 123 __u32 inc_packets; /* incompressible packets */ 124 125 /* the compression ratio is defined as in_count / bytes_out */ 126 __u32 in_count; /* Bytes received */ 127 __u32 bytes_out; /* Bytes transmitted */ 128 129 double ratio; /* not computed in kernel. */ 130}; 131 132struct ppp_stats { 133 struct pppstat p; /* basic PPP statistics */ 134 struct vjstat vj; /* VJ header compression statistics */ 135}; 136 137struct ppp_comp_stats { 138 struct compstat c; /* packet compression statistics */ 139 struct compstat d; /* packet decompression statistics */ 140}; 141 142/* 143 * The following structure records the time in seconds since 144 * the last NP packet was sent or received. 145 * 146 * Linux implements both 32-bit and 64-bit time_t versions 147 * for compatibility with user space that defines ppp_idle 148 * based on the libc time_t. 149 */ 150struct ppp_idle { 151 __kernel_old_time_t xmit_idle; /* time since last NP packet sent */ 152 __kernel_old_time_t recv_idle; /* time since last NP packet received */ 153}; 154 155struct ppp_idle32 { 156 __s32 xmit_idle; /* time since last NP packet sent */ 157 __s32 recv_idle; /* time since last NP packet received */ 158}; 159 160struct ppp_idle64 { 161 __s64 xmit_idle; /* time since last NP packet sent */ 162 __s64 recv_idle; /* time since last NP packet received */ 163}; 164 165#endif /* _UAPI_PPP_DEFS_H_ */ 166