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 #include <linux/types.h>
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_MPLS_UC 0x0281 /* Multi Protocol Label Switching - Unicast */
78 #define PPP_MPLS_MC 0x0283 /* Multi Protocol Label Switching - Multicast */
79 #define PPP_IPCP 0x8021 /* IP Control Protocol */
80 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
81 #define PPP_IPXCP 0x802b /* IPX Control Protocol */
82 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
83 #define PPP_CCPFRAG 0x80fb /* CCP at link level (below MP bundle) */
84 #define PPP_CCP 0x80fd /* Compression Control Protocol */
85 #define PPP_MPLSCP 0x80fd /* MPLS Control Protocol */
86 #define PPP_LCP 0xc021 /* Link Control Protocol */
87 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
88 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
89 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
90 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
91
92 /*
93 * Values for FCS calculations.
94 */
95
96 #define PPP_INITFCS 0xffff /* Initial FCS value */
97 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
98
99 #ifdef __KERNEL__
100 #include <linux/crc-ccitt.h>
101 #define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c)
102 #endif
103
104 /*
105 * Extended asyncmap - allows any character to be escaped.
106 */
107
108 typedef __u32 ext_accm[8];
109
110 /*
111 * What to do with network protocol (NP) packets.
112 */
113 enum NPmode {
114 NPMODE_PASS, /* pass the packet through */
115 NPMODE_DROP, /* silently drop the packet */
116 NPMODE_ERROR, /* return an error */
117 NPMODE_QUEUE /* save it up for later. */
118 };
119
120 /*
121 * Statistics for LQRP and pppstats
122 */
123 struct pppstat {
124 __u32 ppp_discards; /* # frames discarded */
125
126 __u32 ppp_ibytes; /* bytes received */
127 __u32 ppp_ioctects; /* bytes received not in error */
128 __u32 ppp_ipackets; /* packets received */
129 __u32 ppp_ierrors; /* receive errors */
130 __u32 ppp_ilqrs; /* # LQR frames received */
131
132 __u32 ppp_obytes; /* raw bytes sent */
133 __u32 ppp_ooctects; /* frame bytes sent */
134 __u32 ppp_opackets; /* packets sent */
135 __u32 ppp_oerrors; /* transmit errors */
136 __u32 ppp_olqrs; /* # LQR frames sent */
137 };
138
139 struct vjstat {
140 __u32 vjs_packets; /* outbound packets */
141 __u32 vjs_compressed; /* outbound compressed packets */
142 __u32 vjs_searches; /* searches for connection state */
143 __u32 vjs_misses; /* times couldn't find conn. state */
144 __u32 vjs_uncompressedin; /* inbound uncompressed packets */
145 __u32 vjs_compressedin; /* inbound compressed packets */
146 __u32 vjs_errorin; /* inbound unknown type packets */
147 __u32 vjs_tossed; /* inbound packets tossed because of error */
148 };
149
150 struct compstat {
151 __u32 unc_bytes; /* total uncompressed bytes */
152 __u32 unc_packets; /* total uncompressed packets */
153 __u32 comp_bytes; /* compressed bytes */
154 __u32 comp_packets; /* compressed packets */
155 __u32 inc_bytes; /* incompressible bytes */
156 __u32 inc_packets; /* incompressible packets */
157
158 /* the compression ratio is defined as in_count / bytes_out */
159 __u32 in_count; /* Bytes received */
160 __u32 bytes_out; /* Bytes transmitted */
161
162 double ratio; /* not computed in kernel. */
163 };
164
165 struct ppp_stats {
166 struct pppstat p; /* basic PPP statistics */
167 struct vjstat vj; /* VJ header compression statistics */
168 };
169
170 struct ppp_comp_stats {
171 struct compstat c; /* packet compression statistics */
172 struct compstat d; /* packet decompression statistics */
173 };
174
175 /*
176 * The following structure records the time in seconds since
177 * the last NP packet was sent or received.
178 */
179 struct ppp_idle {
180 __kernel_time_t xmit_idle; /* time since last NP packet sent */
181 __kernel_time_t recv_idle; /* time since last NP packet received */
182 };
183
184 #endif /* _PPP_DEFS_H_ */
185
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