1/* From: 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 990806== 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 NP_IPX 1 /* IPX protocol */ 63#define NP_AT 2 /* Appletalk protocol */ 64#define NP_IPV6 3 /* Internet Protocol */ 65#define NUM_NP 4 /* Number of NPs. */ 66 67#define OBUFSIZE 256 /* # chars of output buffering */ 68 69/* 70 * Structure describing each ppp unit. 71 */ 72 73struct ppp { 74 int magic; /* magic value for structure */ 75 struct ppp *next; /* unit with next index */ 76 unsigned long inuse; /* are we allocated? */ 77 int line; /* network interface unit # */ 78 __u32 flags; /* miscellaneous control flags */ 79 int mtu; /* maximum xmit frame size */ 80 int mru; /* maximum receive frame size */ 81 struct slcompress *slcomp; /* for TCP header compression */ 82 struct sk_buff_head xmt_q; /* frames to send from pppd */ 83 struct sk_buff_head rcv_q; /* frames for pppd to read */ 84 unsigned long xmit_busy; /* bit 0 set when xmitter busy */ 85 86 /* Information specific to using ppp on async serial lines. */ 87 struct tty_struct *tty; /* ptr to TTY structure */ 88 struct tty_struct *backup_tty; /* TTY to use if tty gets closed */ 89 __u8 escape; /* 0x20 if prev char was PPP_ESC */ 90 __u8 toss; /* toss this frame */ 91 volatile __u8 tty_pushing; /* internal state flag */ 92 volatile __u8 woke_up; /* internal state flag */ 93 __u32 xmit_async_map[8]; /* 1 bit means that given control 94 character is quoted on output*/ 95 __u32 recv_async_map; /* 1 bit means that given control 96 character is ignored on input*/ 97 __u32 bytes_sent; /* Bytes sent on frame */ 98 __u32 bytes_rcvd; /* Bytes recvd on frame */ 99 100 /* Async transmission information */ 101 struct sk_buff *tpkt; /* frame currently being sent */ 102 int tpkt_pos; /* how much of it we've done */ 103 __u16 tfcs; /* FCS so far for it */ 104 unsigned char *optr; /* where we're up to in sending */ 105 unsigned char *olim; /* points past last valid char */ 106 107 /* Async reception information */ 108 struct sk_buff *rpkt; /* frame currently being rcvd */ 109 __u16 rfcs; /* FCS so far of rpkt */ 110 111 /* Queues for select() functionality */ 112 wait_queue_head_t read_wait; /* queue for reading processes */ 113 114 /* info for detecting idle channels */ 115 unsigned long last_xmit; /* time of last transmission */ 116 unsigned long last_recv; /* time last packet received */ 117 118 /* Statistic information */ 119 struct pppstat stats; /* statistic information */ 120 121 /* PPP compression protocol information */ 122 struct compressor *sc_xcomp; /* transmit compressor */ 123 void *sc_xc_state; /* transmit compressor state */ 124 struct compressor *sc_rcomp; /* receive decompressor */ 125 void *sc_rc_state; /* receive decompressor state */ 126 127 enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */ 128 int sc_xfer; /* PID of reserved PPP table */ 129 char name[16]; /* space for unit name */ 130 struct net_device dev; /* net device structure */ 131 struct net_device_stats estats; /* more detailed stats */ 132 133 /* tty output buffer */ 134 unsigned char obuf[OBUFSIZE]; /* buffer for characters to send */ 135}; 136 137#define PPP_MAGIC 0x5002 138#define PPP_VERSION "2.3.7" 139