2000-10-03 10:54:54 +08:00
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/* $Header: /tcpdump/master/tcpdump/ntp.h,v 1.4 2000-10-03 02:54:57 itojun Exp $ */
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1999-10-08 07:47:09 +08:00
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/*
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* Based on ntp.h from the U of MD implementation
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* This file is based on Version 2 of the NTP spec (RFC1119).
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*/
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/*
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* Definitions for the masses
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*/
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#define JAN_1970 2208988800 /* 1970 - 1900 in seconds */
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/*
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* Structure definitions for NTP fixed point values
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*
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Integer Part |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Fraction Part |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Integer Part | Fraction Part |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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struct l_fixedpt {
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u_int32_t int_part;
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u_int32_t fraction;
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};
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struct s_fixedpt {
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2000-10-03 10:54:54 +08:00
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u_int16_t int_part;
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u_int16_t fraction;
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1999-10-08 07:47:09 +08:00
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};
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/* ================= Table 3.3. Packet Variables ================= */
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/*
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |LI | VN | Mode| Stratum | Poll | Precision |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Synchronizing Distance |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Synchronizing Dispersion |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reference Clock Identifier |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* | Reference Timestamp (64 bits) |
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* | Originate Timestamp (64 bits) |
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* | Receive Timestamp (64 bits) |
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* | Transmit Timestamp (64 bits) |
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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struct ntpdata {
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u_char status; /* status of local clock and leap info */
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u_char stratum; /* Stratum level */
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u_char ppoll; /* poll value */
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int precision:8;
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struct s_fixedpt distance;
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struct s_fixedpt dispersion;
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u_int32_t refid;
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struct l_fixedpt reftime;
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struct l_fixedpt org;
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struct l_fixedpt rec;
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struct l_fixedpt xmt;
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};
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/*
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* Leap Second Codes (high order two bits)
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*/
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#define NO_WARNING 0x00 /* no warning */
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#define PLUS_SEC 0x40 /* add a second (61 seconds) */
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#define MINUS_SEC 0x80 /* minus a second (59 seconds) */
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#define ALARM 0xc0 /* alarm condition (clock unsynchronized) */
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/*
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* Clock Status Bits that Encode Version
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*/
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#define NTPVERSION_1 0x08
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#define VERSIONMASK 0x38
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#define LEAPMASK 0xc0
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#define MODEMASK 0x07
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/*
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* Code values
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*/
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#define MODE_UNSPEC 0 /* unspecified */
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#define MODE_SYM_ACT 1 /* symmetric active */
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#define MODE_SYM_PAS 2 /* symmetric passive */
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#define MODE_CLIENT 3 /* client */
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#define MODE_SERVER 4 /* server */
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#define MODE_BROADCAST 5 /* broadcast */
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#define MODE_RES1 6 /* reserved */
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#define MODE_RES2 7 /* reserved */
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/*
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* Stratum Definitions
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*/
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#define UNSPECIFIED 0
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#define PRIM_REF 1 /* radio clock */
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#define INFO_QUERY 62 /* **** THIS implementation dependent **** */
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#define INFO_REPLY 63 /* **** THIS implementation dependent **** */
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