include/linux/if

/* */
   1 /*      $Id: if_pppvar.h,v 1.2 1995/06/12 11:36:51 paulus Exp $ */
   2 /*
   3  * if_pppvar.h - private structures and declarations for PPP.
   4  *
   5  * Copyright (c) 1994 The Australian National University.
   6  * All rights reserved.
   7  *
   8  * Permission to use, copy, modify, and distribute this software and its
   9  * documentation is hereby granted, provided that the above copyright
  10  * notice appears in all copies.  This software is provided without any
  11  * warranty, express or implied. The Australian National University
  12  * makes no representations about the suitability of this software for
  13  * any purpose.
  14  *
  15  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
  16  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  17  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
  18  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
  19  * OF SUCH DAMAGE.
  20  *
  21  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
  22  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  23  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  24  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
  25  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  26  * OR MODIFICATIONS.
  27  *
  28  * Copyright (c) 1989 Carnegie Mellon University.
  29  * All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms are permitted
  32  * provided that the above copyright notice and this paragraph are
  33  * duplicated in all such forms and that any documentation,
  34  * advertising materials, and other materials related to such
  35  * distribution and use acknowledge that the software was developed
  36  * by Carnegie Mellon University.  The name of the
  37  * University may not be used to endorse or promote products derived
  38  * from this software without specific prior written permission.
  39  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  40  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  41  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  42  */
  43 
  44 /*
  45  *  ==FILEVERSION 960302==
  46  *
  47  *  NOTE TO MAINTAINERS:
  48  *     If you modify this file at all, please set the above date.
  49  *     if_pppvar.h is shipped with a PPP distribution as well as with the kernel;
  50  *     if everyone increases the FILEVERSION number above, then scripts
  51  *     can do the right thing when deciding whether to install a new if_pppvar.h
  52  *     file.  Don't change the format of that line otherwise, so the
  53  *     installation script can recognize it.
  54  */
  55 
  56 /*
  57  * Supported network protocols.  These values are used for
  58  * indexing sc_npmode.
  59  */
  60 
  61 #define NP_IP   0               /* Internet Protocol */
  62 #define NUM_NP  1               /* Number of NPs. */
  63 
  64 /*
  65  * Buffers for the PPP process have the following structure
  66  */
  67 
  68 #define RBUFSIZE  2048           /* MUST be a power of 2 and be <= 4095 */
  69 
  70 struct ppp_buffer {
  71         __s32           size;           /* Size of the buffer area      */
  72         __s32           count;          /* Count of characters in bufr  */
  73         __s32           head;           /* index to head of list        */
  74         __s32           tail;           /* index to tail of list        */
  75         __u32           locked;         /* Buffer is being sent         */
  76         __s32           type;           /* Type of the buffer           */
  77                                         /* =0, device read buffer       */
  78                                         /* =1, device write buffer      */
  79                                         /* =2, daemon write buffer      */
  80                                         /* =3, daemon read buffer       */
  81         __u16           fcs;            /* Frame Check Sequence (CRC)   */
  82         __u8            filler[4];      /* Extra space if needed        */
  83 };
  84 
  85 /* Given a pointer to the ppp_buffer then return base address of buffer */
  86 #define buf_base(buf) ((__u8 *) (&buf[1]))
  87 
  88 /*
  89  * Structure describing each ppp unit.
  90  */
  91 
  92 struct ppp {
  93         __s32           magic;          /* magic value for structure    */
  94 
  95         /* Bitmapped flag fields. */
  96         __u8            inuse;          /* are we allocated?            */
  97         __u8            escape;         /* 0x20 if prev char was PPP_ESC*/
  98         __u8            toss;           /* toss this frame              */
  99 
 100         __u32           flags;          /* miscellany                   */
 101 
 102         __u32           xmit_async_map[8]; /* 1 bit means that given control 
 103                                            character is quoted on output*/
 104 
 105         __u32           recv_async_map; /* 1 bit means that given control 
 106                                            character is ignored on input*/
 107         __s32                   mtu;    /* maximum xmit frame size      */
 108         __s32                   mru;    /* maximum receive frame size   */
 109 
 110         /* Information about the current tty data */
 111         __s32                   line;           /* PPP channel number   */
 112         struct tty_struct       *tty;           /* ptr to TTY structure */
 113         __s32                   bytes_sent;     /* Bytes sent on frame  */
 114         __s32                   bytes_rcvd;     /* Bytes recvd on frame */
 115 
 116         /* Interface to the network layer */
 117         struct device           *dev;    /* easy for intr handling      */
 118 
 119         /* VJ Header compression data */
 120         struct slcompress       *slcomp; /* for header compression      */
 121 
 122         /* Transmission information */
 123         struct ppp_buffer *xbuf;        /* Buffer currently being sent  */
 124         struct ppp_buffer *s1buf;       /* Pointer to daemon buffer     */
 125         struct ppp_buffer *s2buf;       /* Pointer to device buffer     */
 126 
 127         __u32             last_xmit;    /* time of last transmission    */
 128 
 129   /* These are pointers to the malloc()ed frame buffers.
 130      These buffers are used while processing a packet.  If a packet
 131      has to hang around for the user process to read it, it lingers in
 132      the user buffers below. */
 133 
 134         struct ppp_buffer *wbuf;          /* Transmission information   */
 135         struct ppp_buffer *tbuf;          /* daemon transmission buffer */
 136         struct ppp_buffer *rbuf;          /* Receive information        */
 137         struct ppp_buffer *ubuf;          /* User buffer information    */
 138         struct ppp_buffer *cbuf;          /* compression buffer         */
 139 
 140         /* Queues for select() functionality */
 141         struct wait_queue *write_wait;    /* queue for reading processes */
 142         struct wait_queue *read_wait;     /* queue for writing processes */
 143 
 144         /* Statistic information */
 145         struct pppstat        stats;      /* statistic information      */
 146         struct ppp_idle       ddinfo;     /* demand dial information    */
 147 
 148         /* PPP compression protocol information */
 149         __u32   sc_bytessent;             /* count of octets sent */
 150         __u32   sc_bytesrcvd;             /* count of octets received */
 151         enum    NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
 152         struct  compressor *sc_xcomp;     /* transmit compressor */
 153         void    *sc_xc_state;             /* transmit compressor state */
 154         struct  compressor *sc_rcomp;     /* receive decompressor */
 155         void    *sc_rc_state;             /* receive decompressor state */
 156         __s32    sc_xfer;                 /* PID of reserved PPP table */
 157 };
/* */
root/include/linux/if_pppvar.h

INCLUDED FROM
