+++ /dev/null
-/* $Id: if_pppvar.h,v 1.2 1995/06/12 11:36:51 paulus Exp $ */
-/*
- * if_pppvar.h - private structures and declarations for PPP.
- *
- * Copyright (c) 1994 The Australian National University.
- * All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation is hereby granted, provided that the above copyright
- * notice appears in all copies. This software is provided without any
- * warranty, express or implied. The Australian National University
- * makes no representations about the suitability of this software for
- * any purpose.
- *
- * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
- * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
- * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- *
- * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
- * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
- * OR MODIFICATIONS.
- *
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-/*
- * ==PPPVERSION 2.1.3==
- *
- * NOTE TO MAINTAINERS:
- * If you modify this file at all, increment the last number above.
- * ppp.c is shipped with a PPP distribution as well as with the kernel;
- * if everyone increases the PPPVERSION number above, then scripts
- * can do the right thing when deciding whether to install a new ppp.c
- * file. Don't change the format of that line otherwise, so the
- * installation script can recognize it.
- */
-
-/*
- * Supported network protocols. These values are used for
- * indexing sc_npmode.
- */
-
-#define NP_IP 0 /* Internet Protocol */
-#define NUM_NP 1 /* Number of NPs. */
-
-/*
- * Buffers for the PPP process have the following structure
- */
-
-#define RBUFSIZE 2048 /* MUST be a power of 2 and be <= 4095 */
-struct ppp_buffer {
- int size; /* Size of the buffer area */
- int count; /* Count of characters in bufr */
- int head; /* index to head of list */
- int tail; /* index to tail of list */
- int locked; /* Buffer is being sent */
- int type; /* Type of the buffer */
- /* =0, device read buffer */
- /* =1, device write buffer */
- /* =2, daemon write buffer */
- /* =3, daemon read buffer */
- unsigned short fcs; /* Frame Check Sequence (CRC) */
-};
-
-/* Given a pointer to the ppp_buffer then return base address of buffer */
-#define buf_base(buf) ((u_char *) (&buf[1]))
-
-/*
- * Structure describing each ppp unit.
- */
-
-struct ppp {
- int magic; /* magic value for structure */
-
- /* Bitmapped flag fields. */
- char inuse; /* are we allocated? */
- char escape; /* 0x20 if prev char was PPP_ESC*/
- char toss; /* toss this frame */
-
- unsigned int flags; /* miscellany */
-
- ext_accm xmit_async_map; /* 1 bit means that given control
- character is quoted on output*/
-
- unsigned long recv_async_map; /* 1 bit means that given control
- character is ignored on input*/
- int mtu; /* maximum xmit frame size */
- int mru; /* maximum receive frame size */
-
- /* Information about the current tty data */
- int line; /* PPP channel number */
- struct tty_struct *tty; /* ptr to TTY structure */
- int bytes_sent; /* Bytes sent on frame */
- int bytes_rcvd; /* Bytes recvd on frame */
-
- /* Interface to the network layer */
- struct device *dev; /* easy for intr handling */
-
- /* VJ Header compression data */
- struct slcompress *slcomp;/* for header compression */
-
- /* Transmission information */
- struct ppp_buffer *xbuf; /* Buffer currently being sent */
- struct ppp_buffer *s1buf; /* Pointer to daemon buffer */
- struct ppp_buffer *s2buf; /* Pointer to device buffer */
-
- unsigned long last_xmit; /* time of last transmission */
-
- /* These are pointers to the malloc()ed frame buffers.
- These buffers are used while processing a packet. If a packet
- has to hang around for the user process to read it, it lingers in
- the user buffers below. */
-
- struct ppp_buffer *wbuf; /* Transmission information */
- struct ppp_buffer *tbuf; /* daemon transmission buffer */
- struct ppp_buffer *rbuf; /* Receive information */
- struct ppp_buffer *ubuf; /* User buffer information */
- struct ppp_buffer *cbuf; /* compression buffer */
-
- /* Queues for select() functionality */
- struct wait_queue *write_wait; /* queue for reading processes */
- struct wait_queue *read_wait; /* queue for writing processes */
-
- /* Statistic information */
- struct pppstat stats; /* statistic information */
- struct ppp_ddinfo ddinfo; /* demand dial information */
-
- /* PPP compression protocol information */
- u_int sc_bytessent; /* count of octets sent */
- u_int sc_bytesrcvd; /* count of octets received */
- enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
- struct compressor *sc_xcomp; /* transmit compressor */
- void *sc_xc_state; /* transmit compressor state */
- struct compressor *sc_rcomp; /* receive decompressor */
- void *sc_rc_state; /* receive decompressor state */
-};
projects / ppp.git / blobdiff