Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * ppp_defs.h - PPP definitions.
3 *
4 * Copyright (c) 1994 The Australian National University.
5 * All rights reserved.
6 *
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies. This software is provided without any
10 * warranty, express or implied. The Australian National University
11 * makes no representations about the suitability of this software for
12 * any purpose.
13 *
14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
18 * OF SUCH DAMAGE.
19 *
20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
25 * OR MODIFICATIONS.
26 */
27
28/*
29 * ==FILEVERSION 20000114==
30 *
31 * NOTE TO MAINTAINERS:
32 * If you modify this file at all, please set the above date.
33 * ppp_defs.h is shipped with a PPP distribution as well as with the kernel;
34 * if everyone increases the FILEVERSION number above, then scripts
35 * can do the right thing when deciding whether to install a new ppp_defs.h
36 * file. Don't change the format of that line otherwise, so the
37 * installation script can recognize it.
38 */
39
40#ifndef _PPP_DEFS_H_
41#define _PPP_DEFS_H_
42
43/*
44 * The basic PPP frame.
45 */
46#define PPP_HDRLEN 4 /* octets for standard ppp header */
47#define PPP_FCSLEN 2 /* octets for FCS */
48#define PPP_MRU 1500 /* default MRU = max length of info field */
49
50#define PPP_ADDRESS(p) (((__u8 *)(p))[0])
51#define PPP_CONTROL(p) (((__u8 *)(p))[1])
52#define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3])
53
54/*
55 * Significant octet values.
56 */
57#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
58#define PPP_UI 0x03 /* Unnumbered Information */
59#define PPP_FLAG 0x7e /* Flag Sequence */
60#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
61#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
62
63/*
64 * Protocol field values.
65 */
66#define PPP_IP 0x21 /* Internet Protocol */
67#define PPP_AT 0x29 /* AppleTalk Protocol */
68#define PPP_IPX 0x2b /* IPX protocol */
69#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
70#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
71#define PPP_MP 0x3d /* Multilink protocol */
72#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */
73#define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */
74#define PPP_COMP 0xfd /* compressed packet */
75#define PPP_MPLS_UC 0x0281 /* Multi Protocol Label Switching - Unicast */
76#define PPP_MPLS_MC 0x0283 /* Multi Protocol Label Switching - Multicast */
77#define PPP_IPCP 0x8021 /* IP Control Protocol */
78#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
79#define PPP_IPXCP 0x802b /* IPX Control Protocol */
80#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
81#define PPP_CCPFRAG 0x80fb /* CCP at link level (below MP bundle) */
82#define PPP_CCP 0x80fd /* Compression Control Protocol */
83#define PPP_MPLSCP 0x80fd /* MPLS Control Protocol */
84#define PPP_LCP 0xc021 /* Link Control Protocol */
85#define PPP_PAP 0xc023 /* Password Authentication Protocol */
86#define PPP_LQR 0xc025 /* Link Quality Report protocol */
87#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
88#define PPP_CBCP 0xc029 /* Callback Control Protocol */
89
90/*
91 * Values for FCS calculations.
92 */
93
94#define PPP_INITFCS 0xffff /* Initial FCS value */
95#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
96
97#ifdef __KERNEL__
98#include <linux/crc-ccitt.h>
99#define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c)
100#endif
101
102/*
103 * Extended asyncmap - allows any character to be escaped.
104 */
105
106typedef __u32 ext_accm[8];
107
108/*
109 * What to do with network protocol (NP) packets.
110 */
111enum NPmode {
112 NPMODE_PASS, /* pass the packet through */
113 NPMODE_DROP, /* silently drop the packet */
114 NPMODE_ERROR, /* return an error */
115 NPMODE_QUEUE /* save it up for later. */
116};
117
118/*
119 * Statistics for LQRP and pppstats
120 */
121struct pppstat {
122 __u32 ppp_discards; /* # frames discarded */
123
124 __u32 ppp_ibytes; /* bytes received */
125 __u32 ppp_ioctects; /* bytes received not in error */
126 __u32 ppp_ipackets; /* packets received */
127 __u32 ppp_ierrors; /* receive errors */
128 __u32 ppp_ilqrs; /* # LQR frames received */
129
130 __u32 ppp_obytes; /* raw bytes sent */
131 __u32 ppp_ooctects; /* frame bytes sent */
132 __u32 ppp_opackets; /* packets sent */
133 __u32 ppp_oerrors; /* transmit errors */
134 __u32 ppp_olqrs; /* # LQR frames sent */
135};
136
137struct vjstat {
138 __u32 vjs_packets; /* outbound packets */
139 __u32 vjs_compressed; /* outbound compressed packets */
140 __u32 vjs_searches; /* searches for connection state */
141 __u32 vjs_misses; /* times couldn't find conn. state */
142 __u32 vjs_uncompressedin; /* inbound uncompressed packets */
143 __u32 vjs_compressedin; /* inbound compressed packets */
144 __u32 vjs_errorin; /* inbound unknown type packets */
145 __u32 vjs_tossed; /* inbound packets tossed because of error */
146};
147
148struct compstat {
149 __u32 unc_bytes; /* total uncompressed bytes */
150 __u32 unc_packets; /* total uncompressed packets */
151 __u32 comp_bytes; /* compressed bytes */
152 __u32 comp_packets; /* compressed packets */
153 __u32 inc_bytes; /* incompressible bytes */
154 __u32 inc_packets; /* incompressible packets */
155
156 /* the compression ratio is defined as in_count / bytes_out */
157 __u32 in_count; /* Bytes received */
158 __u32 bytes_out; /* Bytes transmitted */
159
160 double ratio; /* not computed in kernel. */
161};
162
163struct ppp_stats {
164 struct pppstat p; /* basic PPP statistics */
165 struct vjstat vj; /* VJ header compression statistics */
166};
167
168struct ppp_comp_stats {
169 struct compstat c; /* packet compression statistics */
170 struct compstat d; /* packet decompression statistics */
171};
172
173/*
174 * The following structure records the time in seconds since
175 * the last NP packet was sent or received.
176 */
177struct ppp_idle {
178 time_t xmit_idle; /* time since last NP packet sent */
179 time_t recv_idle; /* time since last NP packet received */
180};
181
182#endif /* _PPP_DEFS_H_ */