1 /* $Id: ppp_defs.h,v 1.2 1994/09/21 01:31:06 paulus Exp $ */
2
3 /*
4 * ppp_defs.h - PPP definitions.
5 *
6 * Copyright (c) 1994 The Australian National University.
7 * All rights reserved.
8 *
9 * Permission to use, copy, modify, and distribute this software and its
10 * documentation is hereby granted, provided that the above copyright
11 * notice appears in all copies. This software is provided without any
12 * warranty, express or implied. The Australian National University
13 * makes no representations about the suitability of this software for
14 * any purpose.
15 *
16 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
17 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
18 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
19 * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
20 * OF SUCH DAMAGE.
21 *
22 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
23 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
24 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
25 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
26 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
27 * OR MODIFICATIONS.
28 */
29
30 /*
31 * ==FILEVERSION 20000114==
32 *
33 * NOTE TO MAINTAINERS:
34 * If you modify this file at all, please set the above date.
35 * ppp_defs.h is shipped with a PPP distribution as well as with the kernel;
36 * if everyone increases the FILEVERSION number above, then scripts
37 * can do the right thing when deciding whether to install a new ppp_defs.h
38 * file. Don't change the format of that line otherwise, so the
39 * installation script can recognize it.
40 */
41
42 #ifndef _PPP_DEFS_H_
43 #define _PPP_DEFS_H_
44
45 /*
46 * The basic PPP frame.
47 */
48 #define PPP_HDRLEN 4 /* octets for standard ppp header */
49 #define PPP_FCSLEN 2 /* octets for FCS */
50 #define PPP_MRU 1500 /* default MRU = max length of info field */
51
52 #define PPP_ADDRESS(p) (((__u8 *)(p))[0])
53 #define PPP_CONTROL(p) (((__u8 *)(p))[1])
54 #define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3])
55
56 /*
57 * Significant octet values.
58 */
59 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
60 #define PPP_UI 0x03 /* Unnumbered Information */
61 #define PPP_FLAG 0x7e /* Flag Sequence */
62 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
63 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
64
65 /*
66 * Protocol field values.
67 */
68 #define PPP_IP 0x21 /* Internet Protocol */
69 #define PPP_AT 0x29 /* AppleTalk Protocol */
70 #define PPP_IPX 0x2b /* IPX protocol */
71 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
72 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
73 #define PPP_MP 0x3d /* Multilink protocol */
74 #define PPP_IPV6 0x57 /* Internet Protocol Version 6 */
75 #define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */
76 #define PPP_COMP 0xfd /* compressed packet */
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_LCP 0xc021 /* Link Control Protocol */
84 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
85 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
86 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
87 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
88
89 /*
90 * Values for FCS calculations.
91 */
92
93 #define PPP_INITFCS 0xffff /* Initial FCS value */
94 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
95 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
96
97 /*
98 * Extended asyncmap - allows any character to be escaped.
99 */
100
101 typedef __u32 ext_accm[8];
102
103 /*
104 * What to do with network protocol (NP) packets.
105 */
106 enum NPmode {
107 NPMODE_PASS, /* pass the packet through */
108 NPMODE_DROP, /* silently drop the packet */
109 NPMODE_ERROR, /* return an error */
110 NPMODE_QUEUE /* save it up for later. */
111 };
112
113 /*
114 * Statistics for LQRP and pppstats
115 */
116 struct pppstat {
117 __u32 ppp_discards; /* # frames discarded */
118
119 __u32 ppp_ibytes; /* bytes received */
120 __u32 ppp_ioctects; /* bytes received not in error */
121 __u32 ppp_ipackets; /* packets received */
122 __u32 ppp_ierrors; /* receive errors */
123 __u32 ppp_ilqrs; /* # LQR frames received */
124
125 __u32 ppp_obytes; /* raw bytes sent */
126 __u32 ppp_ooctects; /* frame bytes sent */
127 __u32 ppp_opackets; /* packets sent */
128 __u32 ppp_oerrors; /* transmit errors */
129 __u32 ppp_olqrs; /* # LQR frames sent */
130 };
131
132 struct vjstat {
133 __u32 vjs_packets; /* outbound packets */
134 __u32 vjs_compressed; /* outbound compressed packets */
135 __u32 vjs_searches; /* searches for connection state */
136 __u32 vjs_misses; /* times couldn't find conn. state */
137 __u32 vjs_uncompressedin; /* inbound uncompressed packets */
138 __u32 vjs_compressedin; /* inbound compressed packets */
139 __u32 vjs_errorin; /* inbound unknown type packets */
140 __u32 vjs_tossed; /* inbound packets tossed because of error */
141 };
142
143 struct compstat {
144 __u32 unc_bytes; /* total uncompressed bytes */
145 __u32 unc_packets; /* total uncompressed packets */
146 __u32 comp_bytes; /* compressed bytes */
147 __u32 comp_packets; /* compressed packets */
148 __u32 inc_bytes; /* incompressible bytes */
149 __u32 inc_packets; /* incompressible packets */
150
151 /* the compression ratio is defined as in_count / bytes_out */
152 __u32 in_count; /* Bytes received */
153 __u32 bytes_out; /* Bytes transmitted */
154
155 double ratio; /* not computed in kernel. */
156 };
157
158 struct ppp_stats {
159 struct pppstat p; /* basic PPP statistics */
160 struct vjstat vj; /* VJ header compression statistics */
161 };
162
163 struct ppp_comp_stats {
164 struct compstat c; /* packet compression statistics */
165 struct compstat d; /* packet decompression statistics */
166 };
167
168 /*
169 * The following structure records the time in seconds since
170 * the last NP packet was sent or received.
171 */
172 struct ppp_idle {
173 time_t xmit_idle; /* time since last NP packet sent */
174 time_t recv_idle; /* time since last NP packet received */
175 };
176
177 #ifndef __P
178 #ifdef __STDC__
179 #define __P(x) x
180 #else
181 #define __P(x) ()
182 #endif
183 #endif
184
185 #endif /* _PPP_DEFS_H_ */
186
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