sys/net/ppp_layer/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  * $FreeBSD: src/sys/net/ppp_defs.h,v 1.6.2.1 2001/07/03 11:01:41 ume Exp $
  28  * $DragonFly: src/sys/net/ppp_layer/ppp_defs.h,v 1.3 2003/08/26 20:49:48 rob Exp $
  29  */
  30
  31 #ifndef _PPP_DEFS_H_
  32 #define _PPP_DEFS_H_
  33
  34 /*
  35  * The basic PPP frame.
  36  */
  37 #define PPP_HDRLEN      4       /* octets for standard ppp header */
  38 #define PPP_FCSLEN      2       /* octets for FCS */
  39 #define PPP_MRU         1500    /* default MRU = max length of info field */
  40
  41 #define PPP_ADDRESS(p)  (((u_char *)(p))[0])
  42 #define PPP_CONTROL(p)  (((u_char *)(p))[1])
  43 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
  44
  45 /*
  46  * Significant octet values.
  47  */
  48 #define PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
  49 #define PPP_UI          0x03    /* Unnumbered Information */
  50 #define PPP_FLAG        0x7e    /* Flag Sequence */
  51 #define PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
  52 #define PPP_TRANS       0x20    /* Asynchronous transparency modifier */
  53
  54 /*
  55  * Protocol field values.
  56  */
  57 #define PPP_IP          0x21    /* Internet Protocol */
  58 #define PPP_XNS         0x25    /* Xerox NS */
  59 #define PPP_AT          0x29    /* AppleTalk Protocol */
  60 #define PPP_IPX         0x2b    /* IPX Datagram (RFC1552) */
  61 #define PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
  62 #define PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
  63 #define PPP_COMP        0xfd    /* compressed packet */
  64 #define PPP_IPCP        0x8021  /* IP Control Protocol */
  65 #define PPP_ATCP        0x8029  /* AppleTalk Control Protocol */
  66 #define PPP_IPXCP       0x802b  /* IPX Control Protocol (RFC1552) */
  67 #define PPP_CCP         0x80fd  /* Compression Control Protocol */
  68 #define PPP_LCP         0xc021  /* Link Control Protocol */
  69 #define PPP_PAP         0xc023  /* Password Authentication Protocol */
  70 #define PPP_LQR         0xc025  /* Link Quality Report protocol */
  71 #define PPP_CHAP        0xc223  /* Cryptographic Handshake Auth. Protocol */
  72 #define PPP_CBCP        0xc029  /* Callback Control Protocol */
  73 #define PPP_IPV6        0x57    /* Internet Protocol version 6*/
  74 #define PPP_IPV6CP      0x8057  /* IPv6 Control Protocol */
  75
  76 /*
  77  * Values for FCS calculations.
  78  */
  79 #define PPP_INITFCS     0xffff  /* Initial FCS value */
  80 #define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
  81 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
  82
  83 /*
  84  * Extended asyncmap - allows any character to be escaped.
  85  */
  86 typedef u_int32_t       ext_accm[8];
  87
  88 /*
  89  * What to do with network protocol (NP) packets.
  90  */
  91 enum NPmode {
  92     NPMODE_PASS,                /* pass the packet through */
  93     NPMODE_DROP,                /* silently drop the packet */
  94     NPMODE_ERROR,               /* return an error */
  95     NPMODE_QUEUE                /* save it up for later. */
  96 };
  97
  98 /*
  99  * Statistics.
 100  */
 101 struct pppstat  {
 102     unsigned int ppp_ibytes;    /* bytes received */
 103     unsigned int ppp_ipackets;  /* packets received */
 104     unsigned int ppp_ierrors;   /* receive errors */
 105     unsigned int ppp_obytes;    /* bytes sent */
 106     unsigned int ppp_opackets;  /* packets sent */
 107     unsigned int ppp_oerrors;   /* transmit errors */
 108 };
 109
 110 struct vjstat {
 111     unsigned int vjs_packets;   /* outbound packets */
 112     unsigned int vjs_compressed; /* outbound compressed packets */
 113     unsigned int vjs_searches;  /* searches for connection state */
 114     unsigned int vjs_misses;    /* times couldn't find conn. state */
 115     unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
 116     unsigned int vjs_compressedin; /* inbound compressed packets */
 117     unsigned int vjs_errorin;   /* inbound unknown type packets */
 118     unsigned int vjs_tossed;    /* inbound packets tossed because of error */
 119 };
 120
 121 struct ppp_stats {
 122     struct pppstat p;           /* basic PPP statistics */
 123     struct vjstat vj;           /* VJ header compression statistics */
 124 };
 125
 126 struct compstat {
 127     unsigned int unc_bytes;     /* total uncompressed bytes */
 128     unsigned int unc_packets;   /* total uncompressed packets */
 129     unsigned int comp_bytes;    /* compressed bytes */
 130     unsigned int comp_packets;  /* compressed packets */
 131     unsigned int inc_bytes;     /* incompressible bytes */
 132     unsigned int inc_packets;   /* incompressible packets */
 133     unsigned int ratio;         /* recent compression ratio << 8 */
 134 };
 135
 136 struct ppp_comp_stats {
 137     struct compstat c;          /* packet compression statistics */
 138     struct compstat d;          /* packet decompression statistics */
 139 };
 140
 141 /*
 142  * The following structure records the time in seconds since
 143  * the last NP packet was sent or received.
 144  */
 145 struct ppp_idle {
 146     time_t xmit_idle;           /* time since last NP packet sent */
 147     time_t recv_idle;           /* time since last NP packet received */
 148 };
 149
 150
 151 #endif /* _PPP_DEFS_H_ */