1 /* From: if_pppvar.h,v 1.2 1995/06/12 11:36:51 paulus Exp */
3 * if_pppvar.h - private structures and declarations for PPP.
5 * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. The name(s) of the authors of this software must not be used to
20 * endorse or promote products derived from this software without
21 * prior written permission.
23 * 4. Redistributions of any form whatsoever must retain the following
25 * "This product includes software developed by Paul Mackerras
26 * <paulus@samba.org>".
28 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
29 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
30 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
31 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
32 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
33 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
34 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
36 * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in
47 * the documentation and/or other materials provided with the
50 * 3. The name "Carnegie Mellon University" must not be used to
51 * endorse or promote products derived from this software without
52 * prior written permission. For permission or any legal
53 * details, please contact
54 * Office of Technology Transfer
55 * Carnegie Mellon University
57 * Pittsburgh, PA 15213-3890
58 * (412) 268-4387, fax: (412) 268-7395
59 * tech-transfer@andrew.cmu.edu
61 * 4. Redistributions of any form whatsoever must retain the following
63 * "This product includes software developed by Computing Services
64 * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
66 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
67 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
68 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
69 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
70 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
71 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
72 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
76 * ==FILEVERSION 990911==
78 * NOTE TO MAINTAINERS:
79 * If you modify this file at all, please set the above date.
80 * if_pppvar.h is shipped with a PPP distribution as well as with the kernel;
81 * if everyone increases the FILEVERSION number above, then scripts
82 * can do the right thing when deciding whether to install a new if_pppvar.h
83 * file. Don't change the format of that line otherwise, so the
84 * installation script can recognize it.
88 * Supported network protocols. These values are used for
92 #define NP_IP 0 /* Internet Protocol */
93 #define NP_IPX 1 /* IPX protocol */
94 #define NP_AT 2 /* Appletalk protocol */
95 #define NP_IPV6 3 /* Internet Protocol */
96 #define NUM_NP 4 /* Number of NPs. */
98 #define OBUFSIZE 256 /* # chars of output buffering */
101 * Structure describing each ppp unit.
105 int magic; /* magic value for structure */
106 struct ppp *next; /* unit with next index */
107 unsigned long inuse; /* are we allocated? */
108 int line; /* network interface unit # */
109 __u32 flags; /* miscellaneous control flags */
110 int mtu; /* maximum xmit frame size */
111 int mru; /* maximum receive frame size */
112 struct slcompress *slcomp; /* for TCP header compression */
113 struct sk_buff_head xmt_q; /* frames to send from pppd */
114 struct sk_buff_head rcv_q; /* frames for pppd to read */
115 unsigned long xmit_busy; /* bit 0 set when xmitter busy */
117 /* Information specific to using ppp on async serial lines. */
118 struct tty_struct *tty; /* ptr to TTY structure */
119 struct tty_struct *backup_tty; /* TTY to use if tty gets closed */
120 __u8 escape; /* 0x20 if prev char was PPP_ESC */
121 __u8 toss; /* toss this frame */
122 volatile __u8 tty_pushing; /* internal state flag */
123 volatile __u8 woke_up; /* internal state flag */
124 __u32 xmit_async_map[8]; /* 1 bit means that given control
125 character is quoted on output*/
126 __u32 recv_async_map; /* 1 bit means that given control
127 character is ignored on input*/
128 __u32 bytes_sent; /* Bytes sent on frame */
129 __u32 bytes_rcvd; /* Bytes recvd on frame */
131 /* Async transmission information */
132 struct sk_buff *tpkt; /* frame currently being sent */
133 int tpkt_pos; /* how much of it we've done */
134 __u16 tfcs; /* FCS so far for it */
135 unsigned char *optr; /* where we're up to in sending */
136 unsigned char *olim; /* points past last valid char */
138 /* Async reception information */
139 struct sk_buff *rpkt; /* frame currently being rcvd */
140 __u16 rfcs; /* FCS so far of rpkt */
142 /* Queues for select() functionality */
143 struct wait_queue *read_wait; /* queue for reading processes */
145 /* info for detecting idle channels */
146 unsigned long last_xmit; /* time of last transmission */
147 unsigned long last_recv; /* time last packet received */
149 /* Statistic information */
150 struct pppstat stats; /* statistic information */
152 /* PPP compression protocol information */
153 struct compressor *sc_xcomp; /* transmit compressor */
154 void *sc_xc_state; /* transmit compressor state */
155 struct compressor *sc_rcomp; /* receive decompressor */
156 void *sc_rc_state; /* receive decompressor state */
158 enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
159 int sc_xfer; /* PID of reserved PPP table */
160 char name[8]; /* space for unit name */
161 struct device dev; /* net device structure */
162 struct enet_statistics estats; /* more detailed stats */
164 /* tty output buffer */
165 unsigned char obuf[OBUFSIZE]; /* buffer for characters to send */
168 #define PPP_MAGIC 0x5002
169 #define PPP_VERSION "2.3.11"