1 /* $Id: ppp_defs.h,v 1.14 1999/08/13 01:55:40 paulus Exp $ */
4 * ppp_defs.h - PPP definitions.
6 * Copyright (c) 1994 The Australian National University.
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34 * The basic PPP frame.
36 #define PPP_HDRLEN 4 /* octets for standard ppp header */
37 #define PPP_FCSLEN 2 /* octets for FCS */
42 * Note - lcp shouldn't be allowed to negotiate stuff outside these
43 * limits. See lcp.h in the pppd directory.
44 * (XXX - these constants should simply be shared by lcp.c instead
47 #define PPP_MTU 1500 /* Default MTU (size of Info field) */
48 #define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN)
50 #define PPP_MRU 1500 /* default MRU = max length of info field */
51 #define PPP_MAXMRU 65000 /* Largest MRU we allow */
52 #define PPP_MINMRU 128
54 #define PPP_ADDRESS(p) (((u_char *)(p))[0])
55 #define PPP_CONTROL(p) (((u_char *)(p))[1])
56 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
59 * Significant octet values.
61 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
62 #define PPP_UI 0x03 /* Unnumbered Information */
63 #define PPP_FLAG 0x7e /* Flag Sequence */
64 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
65 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
68 * Protocol field values.
70 #define PPP_IP 0x21 /* Internet Protocol */
71 #define PPP_AT 0x29 /* AppleTalk Protocol */
72 #define PPP_IPX 0x2b /* IPX protocol */
73 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
74 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
75 #define PPP_IPV6 0x57 /* Internet Protocol Version 6 */
76 #define PPP_COMP 0xfd /* compressed packet */
77 #define PPP_IPCP 0x8021 /* IP Control Protocol */
78 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
79 #define PPP_IPXCP 0x802b /* IPX Control Protocol */
80 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
81 #define PPP_CCP 0x80fd /* Compression Control Protocol */
82 #define PPP_LCP 0xc021 /* Link Control Protocol */
83 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
84 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
85 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
86 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
89 * Values for FCS calculations.
91 #define PPP_INITFCS 0xffff /* Initial FCS value */
92 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
93 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
96 * A 32-bit unsigned integral type.
99 #if !defined(__BIT_TYPES_DEFINED__) && !defined(_BITYPES) \
100 && !defined(__FreeBSD__) && (NS_TARGET < 40)
102 typedef UINT32_T u_int32_t;
104 typedef unsigned int u_int32_t;
105 typedef unsigned short u_int16_t;
110 * Extended asyncmap - allows any character to be escaped.
112 typedef u_int32_t ext_accm[8];
115 * What to do with network protocol (NP) packets.
118 NPMODE_PASS, /* pass the packet through */
119 NPMODE_DROP, /* silently drop the packet */
120 NPMODE_ERROR, /* return an error */
121 NPMODE_QUEUE /* save it up for later. */
128 unsigned int ppp_ibytes; /* bytes received */
129 unsigned int ppp_ipackets; /* packets received */
130 unsigned int ppp_ierrors; /* receive errors */
131 unsigned int ppp_obytes; /* bytes sent */
132 unsigned int ppp_opackets; /* packets sent */
133 unsigned int ppp_oerrors; /* transmit errors */
137 unsigned int vjs_packets; /* outbound packets */
138 unsigned int vjs_compressed; /* outbound compressed packets */
139 unsigned int vjs_searches; /* searches for connection state */
140 unsigned int vjs_misses; /* times couldn't find conn. state */
141 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
142 unsigned int vjs_compressedin; /* inbound compressed packets */
143 unsigned int vjs_errorin; /* inbound unknown type packets */
144 unsigned int vjs_tossed; /* inbound packets tossed because of error */
148 struct pppstat p; /* basic PPP statistics */
149 struct vjstat vj; /* VJ header compression statistics */
153 unsigned int unc_bytes; /* total uncompressed bytes */
154 unsigned int unc_packets; /* total uncompressed packets */
155 unsigned int comp_bytes; /* compressed bytes */
156 unsigned int comp_packets; /* compressed packets */
157 unsigned int inc_bytes; /* incompressible bytes */
158 unsigned int inc_packets; /* incompressible packets */
159 unsigned int ratio; /* recent compression ratio << 8 */
162 struct ppp_comp_stats {
163 struct compstat c; /* packet compression statistics */
164 struct compstat d; /* packet decompression statistics */
168 * The following structure records the time in seconds since
169 * the last NP packet was sent or received.
172 time_t xmit_idle; /* time since last NP packet sent */
173 time_t recv_idle; /* time since last NP packet received */
184 #endif /* _PPP_DEFS_H_ */