include/linux/ppp_defs.h

   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
  28 /*
  29  *  ==FILEVERSION 20000114==
  30  *
  31  *  NOTE TO MAINTAINERS:
  32  *     If you modify this file at all, please set the above date.
  33  *     ppp_defs.h is shipped with a PPP distribution as well as with the kernel;
  34  *     if everyone increases the FILEVERSION number above, then scripts
  35  *     can do the right thing when deciding whether to install a new ppp_defs.h
  36  *     file.  Don't change the format of that line otherwise, so the
  37  *     installation script can recognize it.
  38  */
  39
  40 #ifndef _PPP_DEFS_H_
  41 #define _PPP_DEFS_H_
  42
  43 /*
  44  * The basic PPP frame.
  45  */
  46 #define PPP_HDRLEN      4       /* octets for standard ppp header */
  47 #define PPP_FCSLEN      2       /* octets for FCS */
  48 #define PPP_MRU         1500    /* default MRU = max length of info field */
  49
  50 #define PPP_ADDRESS(p)  (((__u8 *)(p))[0])
  51 #define PPP_CONTROL(p)  (((__u8 *)(p))[1])
  52 #define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3])
  53
  54 /*
  55  * Significant octet values.
  56  */
  57 #define PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
  58 #define PPP_UI          0x03    /* Unnumbered Information */
  59 #define PPP_FLAG        0x7e    /* Flag Sequence */
  60 #define PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
  61 #define PPP_TRANS       0x20    /* Asynchronous transparency modifier */
  62
  63 /*
  64  * Protocol field values.
  65  */
  66 #define PPP_IP          0x21    /* Internet Protocol */
  67 #define PPP_AT          0x29    /* AppleTalk Protocol */
  68 #define PPP_IPX         0x2b    /* IPX protocol */
  69 #define PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
  70 #define PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
  71 #define PPP_MP          0x3d    /* Multilink protocol */
  72 #define PPP_IPV6        0x57    /* Internet Protocol Version 6 */
  73 #define PPP_COMPFRAG    0xfb    /* fragment compressed below bundle */
  74 #define PPP_COMP        0xfd    /* compressed packet */
  75 #define PPP_MPLS_UC     0x0281  /* Multi Protocol Label Switching - Unicast */
  76 #define PPP_MPLS_MC     0x0283  /* Multi Protocol Label Switching - Multicast */
  77 #define PPP_IPCP        0x8021  /* IP Control Protocol */
  78 #define PPP_ATCP        0x8029  /* AppleTalk Control Protocol */
  79 #define PPP_IPXCP       0x802b  /* IPX Control Protocol */
  80 #define PPP_IPV6CP      0x8057  /* IPv6 Control Protocol */
  81 #define PPP_CCPFRAG     0x80fb  /* CCP at link level (below MP bundle) */
  82 #define PPP_CCP         0x80fd  /* Compression Control Protocol */
  83 #define PPP_MPLSCP      0x80fd  /* MPLS Control Protocol */
  84 #define PPP_LCP         0xc021  /* Link Control Protocol */
  85 #define PPP_PAP         0xc023  /* Password Authentication Protocol */
  86 #define PPP_LQR         0xc025  /* Link Quality Report protocol */
  87 #define PPP_CHAP        0xc223  /* Cryptographic Handshake Auth. Protocol */
  88 #define PPP_CBCP        0xc029  /* Callback Control Protocol */
  89
  90 /*
  91  * Values for FCS calculations.
  92  */
  93
  94 #define PPP_INITFCS     0xffff  /* Initial FCS value */
  95 #define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
  96
  97 #ifdef __KERNEL__
  98 #include <linux/crc-ccitt.h>
  99 #define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c)
 100 #endif
 101
 102 /*
 103  * Extended asyncmap - allows any character to be escaped.
 104  */
 105
 106 typedef __u32           ext_accm[8];
 107
 108 /*
 109  * What to do with network protocol (NP) packets.
 110  */
 111 enum NPmode {
 112     NPMODE_PASS,                /* pass the packet through */
 113     NPMODE_DROP,                /* silently drop the packet */
 114     NPMODE_ERROR,               /* return an error */
 115     NPMODE_QUEUE                /* save it up for later. */
 116 };
 117
 118 /*
 119  * Statistics for LQRP and pppstats
 120  */
 121 struct pppstat  {
 122     __u32       ppp_discards;   /* # frames discarded */
 123
 124     __u32       ppp_ibytes;     /* bytes received */
 125     __u32       ppp_ioctects;   /* bytes received not in error */
 126     __u32       ppp_ipackets;   /* packets received */
 127     __u32       ppp_ierrors;    /* receive errors */
 128     __u32       ppp_ilqrs;      /* # LQR frames received */
 129
 130     __u32       ppp_obytes;     /* raw bytes sent */
 131     __u32       ppp_ooctects;   /* frame bytes sent */
 132     __u32       ppp_opackets;   /* packets sent */
 133     __u32       ppp_oerrors;    /* transmit errors */
 134     __u32       ppp_olqrs;      /* # LQR frames sent */
 135 };
 136
 137 struct vjstat {
 138     __u32       vjs_packets;    /* outbound packets */
 139     __u32       vjs_compressed; /* outbound compressed packets */
 140     __u32       vjs_searches;   /* searches for connection state */
 141     __u32       vjs_misses;     /* times couldn't find conn. state */
 142     __u32       vjs_uncompressedin; /* inbound uncompressed packets */
 143     __u32       vjs_compressedin;   /* inbound compressed packets */
 144     __u32       vjs_errorin;    /* inbound unknown type packets */
 145     __u32       vjs_tossed;     /* inbound packets tossed because of error */
 146 };
 147
 148 struct compstat {
 149     __u32       unc_bytes;      /* total uncompressed bytes */
 150     __u32       unc_packets;    /* total uncompressed packets */
 151     __u32       comp_bytes;     /* compressed bytes */
 152     __u32       comp_packets;   /* compressed packets */
 153     __u32       inc_bytes;      /* incompressible bytes */
 154     __u32       inc_packets;    /* incompressible packets */
 155
 156     /* the compression ratio is defined as in_count / bytes_out */
 157     __u32       in_count;       /* Bytes received */
 158     __u32       bytes_out;      /* Bytes transmitted */
 159
 160     double      ratio;          /* not computed in kernel. */
 161 };
 162
 163 struct ppp_stats {
 164     struct pppstat      p;      /* basic PPP statistics */
 165     struct vjstat       vj;     /* VJ header compression statistics */
 166 };
 167
 168 struct ppp_comp_stats {
 169     struct compstat     c;      /* packet compression statistics */
 170     struct compstat     d;      /* packet decompression statistics */
 171 };
 172
 173 /*
 174  * The following structure records the time in seconds since
 175  * the last NP packet was sent or received.
 176  */
 177 struct ppp_idle {
 178     time_t xmit_idle;           /* time since last NP packet sent */
 179     time_t recv_idle;           /* time since last NP packet received */
 180 };
 181
 182 #endif /* _PPP_DEFS_H_ */