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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/or8 * modify it under the terms of the GNU General Public License9 * 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 pppstats89 */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 since144 * the last NP packet was sent or received.145 *146 * Linux implements both 32-bit and 64-bit time_t versions147 * for compatibility with user space that defines ppp_idle148 * 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