1/*
2 * ppp_defs.h - PPP definitions.
3 *
4 * Copyright 1994-2000 Paul Mackerras.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 */
10#include <linux/types.h>
11
12#ifndef _PPP_DEFS_H_
13#define _PPP_DEFS_H_
14
15/*
16 * The basic PPP frame.
17 */
18#define PPP_HDRLEN 4 /* octets for standard ppp header */
19#define PPP_FCSLEN 2 /* octets for FCS */
20#define PPP_MRU 1500 /* default MRU = max length of info field */
21
22#define PPP_ADDRESS(p) (((__u8 *)(p))[0])
23#define PPP_CONTROL(p) (((__u8 *)(p))[1])
24#define PPP_PROTOCOL(p) ((((__u8 *)(p))[2] << 8) + ((__u8 *)(p))[3])
25
26/*
27 * Significant octet values.
28 */
29#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
30#define PPP_UI 0x03 /* Unnumbered Information */
31#define PPP_FLAG 0x7e /* Flag Sequence */
32#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
33#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
34
35/*
36 * Protocol field values.
37 */
38#define PPP_IP 0x21 /* Internet Protocol */
39#define PPP_AT 0x29 /* AppleTalk Protocol */
40#define PPP_IPX 0x2b /* IPX protocol */
41#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
42#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
43#define PPP_MP 0x3d /* Multilink protocol */
44#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */
45#define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */
46#define PPP_COMP 0xfd /* compressed packet */
47#define PPP_MPLS_UC 0x0281 /* Multi Protocol Label Switching - Unicast */
48#define PPP_MPLS_MC 0x0283 /* Multi Protocol Label Switching - Multicast */
49#define PPP_IPCP 0x8021 /* IP Control Protocol */
50#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
51#define PPP_IPXCP 0x802b /* IPX Control Protocol */
52#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
53#define PPP_CCPFRAG 0x80fb /* CCP at link level (below MP bundle) */
54#define PPP_CCP 0x80fd /* Compression Control Protocol */
55#define PPP_MPLSCP 0x80fd /* MPLS Control Protocol */
56#define PPP_LCP 0xc021 /* Link Control Protocol */
57#define PPP_PAP 0xc023 /* Password Authentication Protocol */
58#define PPP_LQR 0xc025 /* Link Quality Report protocol */
59#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
60#define PPP_CBCP 0xc029 /* Callback Control Protocol */
61
62/*
63 * Values for FCS calculations.
64 */
65
66#define PPP_INITFCS 0xffff /* Initial FCS value */
67#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
68
69
70/*
71 * Extended asyncmap - allows any character to be escaped.
72 */
73
74typedef __u32 ext_accm[8];
75
76/*
77 * What to do with network protocol (NP) packets.
78 */
79enum NPmode {
80 NPMODE_PASS, /* pass the packet through */
81 NPMODE_DROP, /* silently drop the packet */
82 NPMODE_ERROR, /* return an error */
83 NPMODE_QUEUE /* save it up for later. */
84};
85
86/*
87 * Statistics for LQRP and pppstats
88 */
89struct pppstat {
90 __u32 ppp_discards; /* # frames discarded */
91
92 __u32 ppp_ibytes; /* bytes received */
93 __u32 ppp_ioctects; /* bytes received not in error */
94 __u32 ppp_ipackets; /* packets received */
95 __u32 ppp_ierrors; /* receive errors */
96 __u32 ppp_ilqrs; /* # LQR frames received */
97
98 __u32 ppp_obytes; /* raw bytes sent */
99 __u32 ppp_ooctects; /* frame bytes sent */
100 __u32 ppp_opackets; /* packets sent */
101 __u32 ppp_oerrors; /* transmit errors */
102 __u32 ppp_olqrs; /* # LQR frames sent */
103};
104
105struct vjstat {
106 __u32 vjs_packets; /* outbound packets */
107 __u32 vjs_compressed; /* outbound compressed packets */
108 __u32 vjs_searches; /* searches for connection state */
109 __u32 vjs_misses; /* times couldn't find conn. state */
110 __u32 vjs_uncompressedin; /* inbound uncompressed packets */
111 __u32 vjs_compressedin; /* inbound compressed packets */
112 __u32 vjs_errorin; /* inbound unknown type packets */
113 __u32 vjs_tossed; /* inbound packets tossed because of error */
114};
115
116struct compstat {
117 __u32 unc_bytes; /* total uncompressed bytes */
118 __u32 unc_packets; /* total uncompressed packets */
119 __u32 comp_bytes; /* compressed bytes */
120 __u32 comp_packets; /* compressed packets */
121 __u32 inc_bytes; /* incompressible bytes */
122 __u32 inc_packets; /* incompressible packets */
123
124 /* the compression ratio is defined as in_count / bytes_out */
125 __u32 in_count; /* Bytes received */
126 __u32 bytes_out; /* Bytes transmitted */
127
128 double ratio; /* not computed in kernel. */
129};
130
131struct ppp_stats {
132 struct pppstat p; /* basic PPP statistics */
133 struct vjstat vj; /* VJ header compression statistics */
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 __kernel_time_t xmit_idle; /* time since last NP packet sent */
147 __kernel_time_t recv_idle; /* time since last NP packet received */
148};
149
150#endif /* _PPP_DEFS_H_ */
151