139 lines
5.5 KiB
C
139 lines
5.5 KiB
C
/* From: if_pppvar.h,v 1.2 1995/06/12 11:36:51 paulus Exp */
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/*
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* if_pppvar.h - private structures and declarations for PPP.
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*
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* Copyright (c) 1994 The Australian National University.
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, provided that the above copyright
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* notice appears in all copies. This software is provided without any
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* warranty, express or implied. The Australian National University
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* makes no representations about the suitability of this software for
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* any purpose.
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*
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* IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
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* THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
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* OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
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* OR MODIFICATIONS.
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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* ==FILEVERSION 990806==
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*
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* NOTE TO MAINTAINERS:
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* If you modify this file at all, please set the above date.
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* if_pppvar.h is shipped with a PPP distribution as well as with the kernel;
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* if everyone increases the FILEVERSION number above, then scripts
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* can do the right thing when deciding whether to install a new if_pppvar.h
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* file. Don't change the format of that line otherwise, so the
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* installation script can recognize it.
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*/
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/*
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* Supported network protocols. These values are used for
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* indexing sc_npmode.
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*/
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#define NP_IP 0 /* Internet Protocol */
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#define NP_IPX 1 /* IPX protocol */
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#define NP_AT 2 /* Appletalk protocol */
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#define NP_IPV6 3 /* Internet Protocol */
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#define NUM_NP 4 /* Number of NPs. */
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#define OBUFSIZE 256 /* # chars of output buffering */
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/*
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* Structure describing each ppp unit.
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*/
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struct ppp {
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int magic; /* magic value for structure */
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struct ppp *next; /* unit with next index */
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unsigned long inuse; /* are we allocated? */
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int line; /* network interface unit # */
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__u32 flags; /* miscellaneous control flags */
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int mtu; /* maximum xmit frame size */
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int mru; /* maximum receive frame size */
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struct slcompress *slcomp; /* for TCP header compression */
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struct sk_buff_head xmt_q; /* frames to send from pppd */
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struct sk_buff_head rcv_q; /* frames for pppd to read */
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unsigned long xmit_busy; /* bit 0 set when xmitter busy */
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/* Information specific to using ppp on async serial lines. */
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struct tty_struct *tty; /* ptr to TTY structure */
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struct tty_struct *backup_tty; /* TTY to use if tty gets closed */
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__u8 escape; /* 0x20 if prev char was PPP_ESC */
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__u8 toss; /* toss this frame */
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volatile __u8 tty_pushing; /* internal state flag */
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volatile __u8 woke_up; /* internal state flag */
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__u32 xmit_async_map[8]; /* 1 bit means that given control
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character is quoted on output*/
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__u32 recv_async_map; /* 1 bit means that given control
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character is ignored on input*/
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__u32 bytes_sent; /* Bytes sent on frame */
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__u32 bytes_rcvd; /* Bytes recvd on frame */
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/* Async transmission information */
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struct sk_buff *tpkt; /* frame currently being sent */
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int tpkt_pos; /* how much of it we've done */
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__u16 tfcs; /* FCS so far for it */
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unsigned char *optr; /* where we're up to in sending */
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unsigned char *olim; /* points past last valid char */
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/* Async reception information */
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struct sk_buff *rpkt; /* frame currently being rcvd */
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__u16 rfcs; /* FCS so far of rpkt */
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/* Queues for select() functionality */
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wait_queue_head_t read_wait; /* queue for reading processes */
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/* info for detecting idle channels */
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unsigned long last_xmit; /* time of last transmission */
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unsigned long last_recv; /* time last packet received */
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/* Statistic information */
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struct pppstat stats; /* statistic information */
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/* PPP compression protocol information */
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struct compressor *sc_xcomp; /* transmit compressor */
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void *sc_xc_state; /* transmit compressor state */
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struct compressor *sc_rcomp; /* receive decompressor */
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void *sc_rc_state; /* receive decompressor state */
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enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
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int sc_xfer; /* PID of reserved PPP table */
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char name[16]; /* space for unit name */
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struct net_device dev; /* net device structure */
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struct net_device_stats estats; /* more detailed stats */
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/* tty output buffer */
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unsigned char obuf[OBUFSIZE]; /* buffer for characters to send */
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};
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#define PPP_MAGIC 0x5002
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#define PPP_VERSION "2.3.7"
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