/*      $NetBSD: ppp_defs.h,v 1.14 2020/04/04 19:46:01 is Exp $ */
/*      Id: ppp_defs.h,v 1.11 1997/04/30 05:46:24 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
*     <[email protected]>".
*
* 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 _NET_PPP_DEFS_H_
#define _NET_PPP_DEFS_H_

/*
* The basic PPP frame.
*/
#define PPP_HDRLEN      4       /* octets for standard ppp header */
#define PPP_FCSLEN      2       /* octets for FCS */

/*
* Packet sizes
*
* Note - lcp shouldn't be allowed to negotiate stuff outside these
*        limits.  See lcp.h in the pppd directory.
* (XXX - these constants should simply be shared by lcp.c instead
*        of living in lcp.h)
*/
#define PPP_MTU         1500    /* Default MTU (size of Info field) */
#define PPP_MAXMTU      65535 - (PPP_HDRLEN + PPP_FCSLEN)
#define PPP_MINMTU      64
#define PPP_MRU         1500    /* default MRU = max length of info field */
#define PPP_MAXMRU      65000   /* Largest MRU we allow */
#define PPP_MINMRU      128

#define PPP_ADDRESS(p)  (((const u_char *)(p))[0])
#define PPP_CONTROL(p)  (((const u_char *)(p))[1])
#define PPP_PROTOCOL(p) \
   ((((const u_char *)(p))[2] << 8) + ((const 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          0x0021          /* Internet Protocol */
#define PPP_ISO         0x0023          /* ISO OSI Protocol */
#define PPP_XNS         0x0025          /* Xerox NS Protocol */
#define PPP_AT          0x0029          /* AppleTalk Protocol */
#define PPP_IPX         0x002b          /* IPX protocol */
#define PPP_VJC_COMP    0x002d          /* VJ compressed TCP */
#define PPP_VJC_UNCOMP  0x002f          /* VJ uncompressed TCP */
#define PPP_MP          0x003d          /* Multilink PPP Fragment */
#define PPP_IPV6        0x0057          /* Internet Protocol Version 6 */
#define PPP_COMP        0x00fd          /* 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_ECP         0x8053          /* Encryption 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          /* Crypto Handshake Auth. Protocol */
#define PPP_CBCP        0xc029          /* Callback Control Protocol */
#define PPP_EAP         0xc227          /* Extensible Authentication 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])

/*
* Extended asyncmap - allows any character to be escaped.
*/
typedef uint32_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  {
   unsigned int ppp_ibytes;    /* bytes received */
   unsigned int ppp_ipackets;  /* packets received */
   unsigned int ppp_ierrors;   /* receive errors */
   unsigned int ppp_obytes;    /* bytes sent */
   unsigned int ppp_opackets;  /* packets sent */
   unsigned int ppp_oerrors;   /* transmit errors */
};

struct vjstat {
   unsigned int vjs_packets;   /* outbound packets */
   unsigned int vjs_compressed; /* outbound compressed packets */
   unsigned int vjs_searches;  /* searches for connection state */
   unsigned int vjs_misses;    /* times couldn't find conn. state */
   unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
   unsigned int vjs_compressedin; /* inbound compressed packets */
   unsigned int vjs_errorin;   /* inbound unknown type packets */
   unsigned 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 {
   unsigned int unc_bytes;     /* total uncompressed bytes */
   unsigned int unc_packets;   /* total uncompressed packets */
   unsigned int comp_bytes;    /* compressed bytes */
   unsigned int comp_packets;  /* compressed packets */
   unsigned int inc_bytes;     /* incompressible bytes */
   unsigned int inc_packets;   /* incompressible packets */
   unsigned 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 /* !_NET_PPP_DEFS_H_ */

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.