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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 #ifdef __KERNEL__
70 #include <linux/crc-ccitt.h>
71 #define PPP_FCS(fcs, c) crc_ccitt_byte(fcs, c)
72 #endif
73
74 /*
75 * Extended asyncmap - allows any character to be escaped.
76 */
77
78 typedef __u32 ext_accm[8];
79
80 /*
81 * What to do with network protocol (NP) packets.
82 */
83 enum NPmode {
84 NPMODE_PASS, /* pass the packet through */
85 NPMODE_DROP, /* silently drop the packet */
86 NPMODE_ERROR, /* return an error */
87 NPMODE_QUEUE /* save it up for later. */
88 };
89
90 /*
91 * Statistics for LQRP and pppstats
92 */
93 struct pppstat {
94 __u32 ppp_discards; /* # frames discarded */
95
96 __u32 ppp_ibytes; /* bytes received */
97 __u32 ppp_ioctects; /* bytes received not in error */
98 __u32 ppp_ipackets; /* packets received */
99 __u32 ppp_ierrors; /* receive errors */
100 __u32 ppp_ilqrs; /* # LQR frames received */
101
102 __u32 ppp_obytes; /* raw bytes sent */
103 __u32 ppp_ooctects; /* frame bytes sent */
104 __u32 ppp_opackets; /* packets sent */
105 __u32 ppp_oerrors; /* transmit errors */
106 __u32 ppp_olqrs; /* # LQR frames sent */
107 };
108
109 struct vjstat {
110 __u32 vjs_packets; /* outbound packets */
111 __u32 vjs_compressed; /* outbound compressed packets */
112 __u32 vjs_searches; /* searches for connection state */
113 __u32 vjs_misses; /* times couldn't find conn. state */
114 __u32 vjs_uncompressedin; /* inbound uncompressed packets */
115 __u32 vjs_compressedin; /* inbound compressed packets */
116 __u32 vjs_errorin; /* inbound unknown type packets */
117 __u32 vjs_tossed; /* inbound packets tossed because of error */
118 };
119
120 struct compstat {
121 __u32 unc_bytes; /* total uncompressed bytes */
122 __u32 unc_packets; /* total uncompressed packets */
123 __u32 comp_bytes; /* compressed bytes */
124 __u32 comp_packets; /* compressed packets */
125 __u32 inc_bytes; /* incompressible bytes */
126 __u32 inc_packets; /* incompressible packets */
127
128 /* the compression ratio is defined as in_count / bytes_out */
129 __u32 in_count; /* Bytes received */
130 __u32 bytes_out; /* Bytes transmitted */
131
132 double ratio; /* not computed in kernel. */
133 };
134
135 struct ppp_stats {
136 struct pppstat p; /* basic PPP statistics */
137 struct vjstat vj; /* VJ header compression statistics */
138 };
139
140 struct ppp_comp_stats {
141 struct compstat c; /* packet compression statistics */
142 struct compstat d; /* packet decompression statistics */
143 };
144
145 /*
146 * The following structure records the time in seconds since
147 * the last NP packet was sent or received.
148 */
149 struct ppp_idle {
150 __kernel_time_t xmit_idle; /* time since last NP packet sent */
151 __kernel_time_t recv_idle; /* time since last NP packet received */
152 };
153
154 #endif /* _PPP_DEFS_H_ */