1/*
2 * ppp_defs.h - PPP definitions.
3 */
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
29#ifndef _PPP_DEFS_H_
30#define _PPP_DEFS_H_
31
32#include <sys/_types.h>
33
34/*
35 * The basic PPP frame.
36 */
37#define PPP_HDRLEN 4 /* octets for standard ppp header */
38#define PPP_FCSLEN 2 /* octets for FCS */
39#define PPP_MRU 1500 /* default MRU = max length of info field */
40
41#define PPP_ADDRESS(p) (((u_char *)(p))[0])
42#define PPP_CONTROL(p) (((u_char *)(p))[1])
43#define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
44
45/*
46 * Significant octet values.
47 */
48#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
49#define PPP_UI 0x03 /* Unnumbered Information */
50#define PPP_FLAG 0x7e /* Flag Sequence */
51#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
52#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
53
54/*
55 * Protocol field values.
56 */
57#define PPP_IP 0x21 /* Internet Protocol */
58#define PPP_XNS 0x25 /* Xerox NS */
59#define PPP_AT 0x29 /* AppleTalk Protocol */
60#define PPP_IPX 0x2b /* IPX Datagram (RFC1552) */
61#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
62#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
63#define PPP_COMP 0xfd /* compressed packet */
64#define PPP_IPCP 0x8021 /* IP Control Protocol */
65#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
66#define PPP_IPXCP 0x802b /* IPX Control Protocol (RFC1552) */
67#define PPP_CCP 0x80fd /* Compression Control Protocol */
68#define PPP_LCP 0xc021 /* Link Control Protocol */
69#define PPP_PAP 0xc023 /* Password Authentication Protocol */
70#define PPP_LQR 0xc025 /* Link Quality Report protocol */
71#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
72#define PPP_CBCP 0xc029 /* Callback Control Protocol */
73#define PPP_IPV6 0x57 /* Internet Protocol version 6*/
74#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
75
76/*
77 * Values for FCS calculations.
78 */
79#define PPP_INITFCS 0xffff /* Initial FCS value */
80#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
81#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
82
83/*
84 * Extended asyncmap - allows any character to be escaped.
85 */
86typedef __uint32_t ext_accm[8];
87
88/*
89 * What to do with network protocol (NP) packets.
90 */
91enum NPmode {
92 NPMODE_PASS, /* pass the packet through */
93 NPMODE_DROP, /* silently drop the packet */
94 NPMODE_ERROR, /* return an error */
95 NPMODE_QUEUE /* save it up for later. */
96};
97
98/*
99 * Statistics.
100 */
101struct pppstat {
102 unsigned int ppp_ibytes; /* bytes received */
103 unsigned int ppp_ipackets; /* packets received */
104 unsigned int ppp_ierrors; /* receive errors */
105 unsigned int ppp_obytes; /* bytes sent */
106 unsigned int ppp_opackets; /* packets sent */
107 unsigned int ppp_oerrors; /* transmit errors */
108};
109
110struct vjstat {
111 unsigned int vjs_packets; /* outbound packets */
112 unsigned int vjs_compressed; /* outbound compressed packets */
113 unsigned int vjs_searches; /* searches for connection state */
114 unsigned int vjs_misses; /* times couldn't find conn. state */
115 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
116 unsigned int vjs_compressedin; /* inbound compressed packets */
117 unsigned int vjs_errorin; /* inbound unknown type packets */
118 unsigned int vjs_tossed; /* inbound packets tossed because of error */
119};
120
121struct ppp_stats {
122 struct pppstat p; /* basic PPP statistics */
123 struct vjstat vj; /* VJ header compression statistics */
124};
125
126struct compstat {
127 unsigned int unc_bytes; /* total uncompressed bytes */
128 unsigned int unc_packets; /* total uncompressed packets */
129 unsigned int comp_bytes; /* compressed bytes */
130 unsigned int comp_packets; /* compressed packets */
131 unsigned int inc_bytes; /* incompressible bytes */
132 unsigned int inc_packets; /* incompressible packets */
133 unsigned int ratio; /* recent compression ratio << 8 */
134};
135
136struct ppp_comp_stats {
137 struct compstat c; /* packet compression statistics */
138 struct compstat d; /* packet decompression statistics */
139};
140
141/*
142 * The following structure records the time in seconds since
143 * the last NP packet was sent or received.
144 */
145struct ppp_idle {
146 __time_t xmit_idle; /* time since last NP packet sent */
147 __time_t recv_idle; /* time since last NP packet received */
148};
149
150#ifndef __P
151#ifdef __STDC__
152#define __P(x) x
153#else
154#define __P(x) ()
155#endif
156#endif
157
158#endif /* _PPP_DEFS_H_ */