include/linux/ppp_defs.h

   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
  78 typedef __u32           ext_accm[8];
  79
  80 /*
  81  * What to do with network protocol (NP) packets.
  82  */
  83 enum 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  */
  93 struct 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
 109 struct 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
 120 struct 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
 135 struct ppp_stats {
 136     struct pppstat      p;      /* basic PPP statistics */
 137     struct vjstat       vj;     /* VJ header compression statistics */
 138 };
 139
 140 struct 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  */
 149 struct 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_ */