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/* From: 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.
*/
/*
* ==FILEVERSION 990325==
*
* NOTE TO MAINTAINERS:
* If you modify this file at all, please set the above date.
* if_pppvar.h is shipped with a PPP distribution as well as with the kernel;
* if everyone increases the FILEVERSION number above, then scripts
* can do the right thing when deciding whether to install a new if_pppvar.h
* 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 NP_IPX 1 /* IPX protocol */
#define NP_AT 2 /* Appletalk protocol */
#define NP_IPV6 3 /* Internet Protocol */
#define NUM_NP 4 /* Number of NPs. */
#define OBUFSIZE 256 /* # chars of output buffering */
/*
* Structure describing each ppp unit.
*/
struct ppp {
int magic; /* magic value for structure */
struct ppp *next; /* unit with next index */
unsigned long inuse; /* are we allocated? */
int line; /* network interface unit # */
__u32 flags; /* miscellaneous control flags */
int mtu; /* maximum xmit frame size */
int mru; /* maximum receive frame size */
struct slcompress *slcomp; /* for TCP header compression */
struct sk_buff_head xmt_q; /* frames to send from pppd */
struct sk_buff_head rcv_q; /* frames for pppd to read */
unsigned long xmit_busy; /* bit 0 set when xmitter busy */
/* Information specific to using ppp on async serial lines. */
struct tty_struct *tty; /* ptr to TTY structure */
struct tty_struct *backup_tty; /* TTY to use if tty gets closed */
__u8 escape; /* 0x20 if prev char was PPP_ESC */
__u8 toss; /* toss this frame */
volatile __u8 tty_pushing; /* internal state flag */
volatile __u8 woke_up; /* internal state flag */
__u32 xmit_async_map[8]; /* 1 bit means that given control
character is quoted on output*/
__u32 recv_async_map; /* 1 bit means that given control
character is ignored on input*/
__u32 bytes_sent; /* Bytes sent on frame */
__u32 bytes_rcvd; /* Bytes recvd on frame */
/* Async transmission information */
struct sk_buff *tpkt; /* frame currently being sent */
int tpkt_pos; /* how much of it we've done */
__u16 tfcs; /* FCS so far for it */
unsigned char *optr; /* where we're up to in sending */
unsigned char *olim; /* points past last valid char */
/* Async reception information */
struct sk_buff *rpkt; /* frame currently being rcvd */
__u16 rfcs; /* FCS so far of rpkt */
/* Queues for select() functionality */
struct wait_queue *read_wait; /* queue for reading processes */
/* info for detecting idle channels */
unsigned long last_xmit; /* time of last transmission */
unsigned long last_recv; /* time last packet received */
/* Statistic information */
struct pppstat stats; /* statistic information */
/* PPP compression protocol information */
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 */
enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
int sc_xfer; /* PID of reserved PPP table */
char name[8]; /* space for unit name */
struct device dev; /* net device structure */
struct enet_statistics estats; /* more detailed stats */
/* tty output buffer */
unsigned char obuf[OBUFSIZE]; /* buffer for characters to send */
};
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