release/src/router/pppd/include/linux/ppp_defs.h

   1 /*      $Id: ppp_defs.h,v 1.11 2002/12/06 09:49:15 paulus Exp $ */
   2
   3 /*
   4  * ppp_defs.h - PPP definitions.
   5  *
   6  * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. The name(s) of the authors of this software must not be used to
  21  *    endorse or promote products derived from this software without
  22  *    prior written permission.
  23  *
  24  * 4. Redistributions of any form whatsoever must retain the following
  25  *    acknowledgment:
  26  *    "This product includes software developed by Paul Mackerras
  27  *     <paulus@samba.org>".
  28  *
  29  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
  30  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  31  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
  32  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  33  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
  34  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  35  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  36  */
  37
  38 /*
  39  *  ==FILEVERSION 20020521==
  40  *
  41  *  NOTE TO MAINTAINERS:
  42  *     If you modify this file at all, please set the above date.
  43  *     ppp_defs.h is shipped with a PPP distribution as well as with the kernel;
  44  *     if everyone increases the FILEVERSION number above, then scripts
  45  *     can do the right thing when deciding whether to install a new ppp_defs.h
  46  *     file.  Don't change the format of that line otherwise, so the
  47  *     installation script can recognize it.
  48  */
  49
  50 #ifndef _PPP_DEFS_H_
  51 #define _PPP_DEFS_H_
  52
  53 /*
  54  * The basic PPP frame.
  55  */
  56 #define PPP_HDRLEN      4       /* octets for standard ppp header */
  57 #define PPP_FCSLEN      2       /* octets for FCS */
  58 #define PPP_MRU         1500    /* default MRU = max length of info field */
  59
  60 #define PPP_ADDRESS(p)  (((__u8 *)(p))[0])
  61 #define PPP_CONTROL(p)  (((__u8 *)(p))[1])
  62 #define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3])
  63
  64 /*
  65  * Significant octet values.
  66  */
  67 #define PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
  68 #define PPP_UI          0x03    /* Unnumbered Information */
  69 #define PPP_FLAG        0x7e    /* Flag Sequence */
  70 #define PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
  71 #define PPP_TRANS       0x20    /* Asynchronous transparency modifier */
  72
  73 /*
  74  * Protocol field values.
  75  */
  76 #define PPP_IP          0x21    /* Internet Protocol */
  77 #define PPP_AT          0x29    /* AppleTalk Protocol */
  78 #define PPP_IPX         0x2b    /* IPX protocol */
  79 #define PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
  80 #define PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
  81 #define PPP_MP          0x3d    /* Multilink protocol */
  82 #define PPP_IPV6        0x57    /* Internet Protocol Version 6 */
  83 #define PPP_COMPFRAG    0xfb    /* fragment compressed below bundle */
  84 #define PPP_COMP        0xfd    /* compressed packet */
  85 #define PPP_IPCP        0x8021  /* IP Control Protocol */
  86 #define PPP_ATCP        0x8029  /* AppleTalk Control Protocol */
  87 #define PPP_IPXCP       0x802b  /* IPX Control Protocol */
  88 #define PPP_IPV6CP      0x8057  /* IPv6 Control Protocol */
  89 #define PPP_CCPFRAG     0x80fb  /* CCP at link level (below MP bundle) */
  90 #define PPP_CCP         0x80fd  /* Compression Control Protocol */
  91 #define PPP_ECPFRAG     0x8055  /* ECP at link level (below MP bundle) */
  92 #define PPP_ECP         0x8053  /* Encryption Control Protocol */
  93 #define PPP_LCP         0xc021  /* Link Control Protocol */
  94 #define PPP_PAP         0xc023  /* Password Authentication Protocol */
  95 #define PPP_LQR         0xc025  /* Link Quality Report protocol */
  96 #define PPP_CHAP        0xc223  /* Cryptographic Handshake Auth. Protocol */
  97 #define PPP_CBCP        0xc029  /* Callback Control Protocol */
  98
  99 /*
 100  * Values for FCS calculations.
 101  */
 102
 103 #define PPP_INITFCS     0xffff  /* Initial FCS value */
 104 #define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
 105 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
 106
 107 /*
 108  * Extended asyncmap - allows any character to be escaped.
 109  */
 110
 111 typedef __u32           ext_accm[8];
 112
 113 /*
 114  * What to do with network protocol (NP) packets.
 115  */
 116 enum NPmode {
 117     NPMODE_PASS,                /* pass the packet through */
 118     NPMODE_DROP,                /* silently drop the packet */
 119     NPMODE_ERROR,               /* return an error */
 120     NPMODE_QUEUE                /* save it up for later. */
 121 };
 122
 123 /*
 124  * Statistics for LQRP and pppstats
 125  */
 126 struct pppstat  {
 127     __u32       ppp_discards;   /* # frames discarded */
 128
 129     __u32       ppp_ibytes;     /* bytes received */
 130     __u32       ppp_ioctects;   /* bytes received not in error */
 131     __u32       ppp_ipackets;   /* packets received */
 132     __u32       ppp_ierrors;    /* receive errors */
 133     __u32       ppp_ilqrs;      /* # LQR frames received */
 134
 135     __u32       ppp_obytes;     /* raw bytes sent */
 136     __u32       ppp_ooctects;   /* frame bytes sent */
 137     __u32       ppp_opackets;   /* packets sent */
 138     __u32       ppp_oerrors;    /* transmit errors */
 139     __u32       ppp_olqrs;      /* # LQR frames sent */
 140 };
 141
 142 struct vjstat {
 143     __u32       vjs_packets;    /* outbound packets */
 144     __u32       vjs_compressed; /* outbound compressed packets */
 145     __u32       vjs_searches;   /* searches for connection state */
 146     __u32       vjs_misses;     /* times couldn't find conn. state */
 147     __u32       vjs_uncompressedin; /* inbound uncompressed packets */
 148     __u32       vjs_compressedin;   /* inbound compressed packets */
 149     __u32       vjs_errorin;    /* inbound unknown type packets */
 150     __u32       vjs_tossed;     /* inbound packets tossed because of error */
 151 };
 152
 153 struct compstat {
 154     __u32       unc_bytes;      /* total uncompressed bytes */
 155     __u32       unc_packets;    /* total uncompressed packets */
 156     __u32       comp_bytes;     /* compressed bytes */
 157     __u32       comp_packets;   /* compressed packets */
 158     __u32       inc_bytes;      /* incompressible bytes */
 159     __u32       inc_packets;    /* incompressible packets */
 160
 161     /* the compression ratio is defined as in_count / bytes_out */
 162     __u32       in_count;       /* Bytes received */
 163     __u32       bytes_out;      /* Bytes transmitted */
 164
 165     double      ratio;          /* not computed in kernel. */
 166 };
 167
 168 struct ppp_stats {
 169     struct pppstat      p;      /* basic PPP statistics */
 170     struct vjstat       vj;     /* VJ header compression statistics */
 171 };
 172
 173 struct ppp_comp_stats {
 174     struct compstat     c;      /* packet compression statistics */
 175     struct compstat     d;      /* packet decompression statistics */
 176 };
 177
 178 /*
 179  * The following structure records the time in seconds since
 180  * the last NP packet was sent or received.
 181  */
 182 struct ppp_idle {
 183     time_t xmit_idle;           /* time since last NP packet sent */
 184     time_t recv_idle;           /* time since last NP packet received */
 185 };
 186
 187 #ifndef __P
 188 #ifdef __STDC__
 189 #define __P(x)  x
 190 #else
 191 #define __P(x)  ()
 192 #endif
 193 #endif
 194
 195 #endif /* _PPP_DEFS_H_ */