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

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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 * $Id$
28 */
29
30#ifndef _PPP_DEFS_H_
31#define _PPP_DEFS_H_
32
33/*
34 * The basic PPP frame.
35 */

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50#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
51#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
52
53/*
54 * Protocol field values.
55 */
56#define PPP_IP 0x21 /* Internet Protocol */
57#define PPP_XNS 0x25 /* Xerox NS */
58#define PPP_AT 0x29 /* AppleTalk Protocol */
59#define PPP_IPX 0x2b /* IPX Datagram (RFC1552) */
60#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
61#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
62#define PPP_COMP 0xfd /* compressed packet */
63#define PPP_IPCP 0x8021 /* IP Control Protocol */
64#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
65#define PPP_IPXCP 0x802b /* IPX Control Protocol (RFC1552) */
66#define PPP_CCP 0x80fd /* Compression Control Protocol */
67#define PPP_LCP 0xc021 /* Link Control Protocol */
68#define PPP_PAP 0xc023 /* Password Authentication Protocol */
69#define PPP_LQR 0xc025 /* Link Quality Report protocol */
70#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
71#define PPP_CBCP 0xc029 /* Callback Control Protocol */
72
73/*
74 * Values for FCS calculations.
75 */
76#define PPP_INITFCS 0xffff /* Initial FCS value */
77#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
78#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
79
80/*
81 * Extended asyncmap - allows any character to be escaped.
82 */
83typedef u_int32_t ext_accm[8];
84
85/*
86 * What to do with network protocol (NP) packets.
87 */
88enum NPmode {
89 NPMODE_PASS, /* pass the packet through */
90 NPMODE_DROP, /* silently drop the packet */
91 NPMODE_ERROR, /* return an error */
92 NPMODE_QUEUE /* save it up for later. */
93};
94
95/*
96 * Statistics.
97 */
98struct pppstat {
99 unsigned int ppp_ibytes; /* bytes received */
100 unsigned int ppp_ipackets; /* packets received */
101 unsigned int ppp_ierrors; /* receive errors */
102 unsigned int ppp_obytes; /* bytes sent */
103 unsigned int ppp_opackets; /* packets sent */
104 unsigned int ppp_oerrors; /* transmit errors */
105};
106
107struct vjstat {
108 unsigned int vjs_packets; /* outbound packets */
109 unsigned int vjs_compressed; /* outbound compressed packets */
110 unsigned int vjs_searches; /* searches for connection state */
111 unsigned int vjs_misses; /* times couldn't find conn. state */
112 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
113 unsigned int vjs_compressedin; /* inbound compressed packets */
114 unsigned int vjs_errorin; /* inbound unknown type packets */
115 unsigned int vjs_tossed; /* inbound packets tossed because of error */
116};
117
118struct ppp_stats {
119 struct pppstat p; /* basic PPP statistics */
120 struct vjstat vj; /* VJ header compression statistics */
121};
122
123struct compstat {
124 unsigned int unc_bytes; /* total uncompressed bytes */
125 unsigned int unc_packets; /* total uncompressed packets */
126 unsigned int comp_bytes; /* compressed bytes */
127 unsigned int comp_packets; /* compressed packets */
128 unsigned int inc_bytes; /* incompressible bytes */
129 unsigned int inc_packets; /* incompressible packets */
130 unsigned int ratio; /* recent compression ratio << 8 */
131};
132
133struct ppp_comp_stats {
134 struct compstat c; /* packet compression statistics */
135 struct compstat d; /* packet decompression statistics */
136};
137
138/*
139 * The following structure records the time in seconds since
140 * the last NP packet was sent or received.
141 */
142struct ppp_idle {
143 time_t xmit_idle; /* time since last NP packet sent */

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