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