FreeBSD/Linux Kernel Cross Reference
sys/net/ppp_defs.h

     /*      $OpenBSD: ppp_defs.h,v 1.13 2002/09/13 00:12:07 deraadt Exp $   */
     /*      $NetBSD: ppp_defs.h,v 1.1 1995/07/04 06:28:26 paulus Exp $      */
     
     /*
      * ppp_defs.h - PPP definitions.
      *
      * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     *
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     *
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in
     *    the documentation and/or other materials provided with the
     *    distribution.
     *
     * 3. The name(s) of the authors of this software must not be used to
     *    endorse or promote products derived from this software without
     *    prior written permission.
     *
     * 4. Redistributions of any form whatsoever must retain the following
     *    acknowledgment:
     *    "This product includes software developed by Paul Mackerras
     *     <paulus@samba.org>".
     *
     * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
     * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
     * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
     * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
     * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
     * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     */
    
    #ifndef _PPP_DEFS_H_
    #define _PPP_DEFS_H_
    
    /*
     * The basic PPP frame.
     */
    #define PPP_HDRLEN      4       /* octets for standard ppp header */
    #define PPP_FCSLEN      2       /* octets for FCS */
    #define PPP_MRU         1500    /* default MRU = max length of info field */
    
    #define PPP_ADDRESS(p)  (((u_char *)(p))[0])
    #define PPP_CONTROL(p)  (((u_char *)(p))[1])
    #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
    
    /*
     * Significant octet values.
     */
    #define PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
    #define PPP_UI          0x03    /* Unnumbered Information */
    #define PPP_FLAG        0x7e    /* Flag Sequence */
    #define PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
    #define PPP_TRANS       0x20    /* Asynchronous transparency modifier */
    
    /*
     * Protocol field values.
     */
    #define PPP_IP          0x21    /* Internet Protocol */
    #define PPP_XNS         0x25    /* Xerox NS */
    #define PPP_AT          0x29    /* AppleTalk Protocol */
    #define PPP_IPX         0x2b    /* Internetwork Packet Exchange */
    #define PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
    #define PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
    #define PPP_IPV6        0x57    /* Internet Protocol Version 6 */
    #define PPP_COMP        0xfd    /* compressed packet */
    #define PPP_IPCP        0x8021  /* IP Control Protocol */
    #define PPP_ATCP        0x8029  /* AppleTalk Control Protocol */
    #define PPP_IPXCP       0x802b  /* IPX Control Protocol */
    #define PPP_IPV6CP      0x8057  /* IPv6 Control Protocol */
    #define PPP_CCP         0x80fd  /* Compression Control Protocol */
    #define PPP_LCP         0xc021  /* Link Control Protocol */
    #define PPP_PAP         0xc023  /* Password Authentication Protocol */
    #define PPP_LQR         0xc025  /* Link Quality Report protocol */
    #define PPP_CHAP        0xc223  /* Cryptographic Handshake Auth. Protocol */
    #define PPP_CBCP        0xc029  /* Callback Control Protocol */
    
    /*
     * Values for FCS calculations.
     */
    #define PPP_INITFCS     0xffff  /* Initial FCS value */
    #define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
    #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
    
    /*
     * A 32-bit unsigned integral type.
     */
    #ifndef __BIT_TYPES_DEFINED__
    #ifdef  UINT32_T
    typedef UINT32_T        u_int32_t;
    #else
    typedef unsigned int    u_int32_t;
    typedef unsigned short  u_int16_t;
   #endif
   #endif
   
   /*
    * Extended asyncmap - allows any character to be escaped.
    */
   typedef u_int32_t       ext_accm[8];
   
   /*
    * What to do with network protocol (NP) packets.
    */
   enum NPmode {
       NPMODE_PASS,                /* pass the packet through */
       NPMODE_DROP,                /* silently drop the packet */
       NPMODE_ERROR,               /* return an error */
       NPMODE_QUEUE                /* save it up for later. */
   };
   
   /*
    * Statistics.
    */
   struct pppstat  {
       u_int       ppp_ibytes;     /* bytes received */
       u_int       ppp_ipackets;   /* packets received */
       u_int       ppp_ierrors;    /* receive errors */
       u_int       ppp_obytes;     /* bytes sent */
       u_int       ppp_opackets;   /* packets sent */
       u_int       ppp_oerrors;    /* transmit errors */
   };
   
   struct vjstat {
       u_int       vjs_packets;    /* outbound packets */
       u_int       vjs_compressed; /* outbound compressed packets */
       u_int       vjs_searches;   /* searches for connection state */
       u_int       vjs_misses;     /* times couldn't find conn. state */
       u_int       vjs_uncompressedin; /* inbound uncompressed packets */
       u_int       vjs_compressedin;   /* inbound compressed packets */
       u_int       vjs_errorin;    /* inbound unknown type packets */
       u_int       vjs_tossed;     /* inbound packets tossed because of error */
   };
   
   struct ppp_stats {
       struct pppstat      p;      /* basic PPP statistics */
       struct vjstat       vj;     /* VJ header compression statistics */
   };
   
   struct compstat {
       u_int       unc_bytes;      /* total uncompressed bytes */
       u_int       unc_packets;    /* total uncompressed packets */
       u_int       comp_bytes;     /* compressed bytes */
       u_int       comp_packets;   /* compressed packets */
       u_int       inc_bytes;      /* incompressible bytes */
       u_int       inc_packets;    /* incompressible packets */
       u_int       ratio;          /* recent compression ratio << 8 */
   };
   
   struct ppp_comp_stats {
       struct compstat     c;      /* packet compression statistics */
       struct compstat     d;      /* packet decompression statistics */
   };
   
   /*
    * The following structure records the time in seconds since
    * the last NP packet was sent or received.
    */
   struct ppp_idle {
       time_t xmit_idle;           /* time since last NP packet sent */
       time_t recv_idle;           /* time since last NP packet received */
   };
   
   #endif /* _PPP_DEFS_H_ */

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