2 * ppp_defs.h - PPP definitions.
4 * 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 */
38 #define PPP_MRU 1500 /* default MRU = max length of info field */
40 #define PPP_ADDRESS(p) (((u_char *)(p))[0])
41 #define PPP_CONTROL(p) (((u_char *)(p))[1])
42 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
45 * Significant octet values.
47 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
48 #define PPP_UI 0x03 /* Unnumbered Information */
49 #define PPP_FLAG 0x7e /* Flag Sequence */
50 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
51 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
54 * Protocol field values.
56 #define PPP_IP 0x21 /* Internet Protocol */
57 #define PPP_XNS 0x25 /* Xerox NS */
58 #define PPP_AT 0x29 /* AppleTalk Protocol */
59 #define PPP_IPX 0x2b /* IPX Datagram (RFC1552) */
60 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
61 #define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
62 #define PPP_COMP 0xfd /* compressed packet */
63 #define PPP_IPCP 0x8021 /* IP Control Protocol */
64 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
65 #define PPP_IPXCP 0x802b /* IPX Control Protocol (RFC1552) */
66 #define PPP_CCP 0x80fd /* Compression Control Protocol */
67 #define PPP_LCP 0xc021 /* Link Control Protocol */
68 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
69 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
70 #define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
71 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
74 * Values for FCS calculations.
76 #define PPP_INITFCS 0xffff /* Initial FCS value */
77 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
78 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
81 * Extended asyncmap - allows any character to be escaped.
83 typedef u_int32_t ext_accm[8];
86 * What to do with network protocol (NP) packets.
89 NPMODE_PASS, /* pass the packet through */
90 NPMODE_DROP, /* silently drop the packet */
91 NPMODE_ERROR, /* return an error */
92 NPMODE_QUEUE /* save it up for later. */
99 unsigned int ppp_ibytes; /* bytes received */
100 unsigned int ppp_ipackets; /* packets received */
101 unsigned int ppp_ierrors; /* receive errors */
102 unsigned int ppp_obytes; /* bytes sent */
103 unsigned int ppp_opackets; /* packets sent */
104 unsigned int ppp_oerrors; /* transmit errors */
108 unsigned int vjs_packets; /* outbound packets */
109 unsigned int vjs_compressed; /* outbound compressed packets */
110 unsigned int vjs_searches; /* searches for connection state */
111 unsigned int vjs_misses; /* times couldn't find conn. state */
112 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
113 unsigned int vjs_compressedin; /* inbound compressed packets */
114 unsigned int vjs_errorin; /* inbound unknown type packets */
115 unsigned int vjs_tossed; /* inbound packets tossed because of error */
119 struct pppstat p; /* basic PPP statistics */
120 struct vjstat vj; /* VJ header compression statistics */
124 unsigned int unc_bytes; /* total uncompressed bytes */
125 unsigned int unc_packets; /* total uncompressed packets */
126 unsigned int comp_bytes; /* compressed bytes */
127 unsigned int comp_packets; /* compressed packets */
128 unsigned int inc_bytes; /* incompressible bytes */
129 unsigned int inc_packets; /* incompressible packets */
130 unsigned int ratio; /* recent compression ratio << 8 */
133 struct ppp_comp_stats {
134 struct compstat c; /* packet compression statistics */
135 struct compstat d; /* packet decompression statistics */
139 * The following structure records the time in seconds since
140 * the last NP packet was sent or received.
143 time_t xmit_idle; /* time since last NP packet sent */
144 time_t recv_idle; /* time since last NP packet received */
155 #endif /* _PPP_DEFS_H_ */