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tcpdump/ntp.h

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provide decent multipline output for the NTP printer
2004-01-28 22:34:50 +08:00
/* $Header: /tcpdump/master/tcpdump/ntp.h,v 1.8 2004-01-28 14:34:50 hannes Exp $ */
Initial revision
1999-10-08 07:47:09 +08:00
/*
* Based on ntp.h from the U of MD implementation
* This file is based on Version 2 of the NTP spec (RFC1119).
*/
/*
* Definitions for the masses
*/
1970 - 1900 in seconds doesn't fit in 31 bits; explicitly make it unsigned to avoid compiler warnings.
2003-08-06 12:58:21 +08:00
#define JAN_1970 2208988800U /* 1970 - 1900 in seconds */
Initial revision
1999-10-08 07:47:09 +08:00
/*
* Structure definitions for NTP fixed point values
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Integer Part |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Fraction Part |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* 0 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Integer Part | Fraction Part |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
struct l_fixedpt {
u_int32_t int_part;
u_int32_t fraction;
The "__attribute__((packed))" tag on structures causes some files not to compile with Sun C, as "interface.h" isn't being included before the structures are being declared. Furthermore, in the files that Sun C *can* compile, it doesn't cause Sun C to generate code that's safe with unaligned accesses, as "__attribute__" is defined as a do-nothing macro with compilers that don't support it. Therefore, we get rid of that tag on the structures to which it was added, and instead use "EXTRACT_16BIT()" and "EXTRACT_32BIT()" to fetch 16-bit and 32-bit big-endian quantities from packets. We also fix some other references to multi-byte quantities to get rid of code that tries to do unaligned loads on platforms that don't support them. We also throw in a hack that makes those macros use "__attribute__((packed))" on structures containing only one 16-bit or 32-bit integer to get the compiler to generate unaligned-safe code rather than doing it by hand. (GCC on SPARC produces the same code that doing it by hand does; I don't know if GCC on any other big-endian strict-alignment processor generates better code for that case. On little-endian processors, as "ntohs()" and "ntohl()" might be functions, that might actually produce worse code.) Fix some places to use "%u" rather than "%d" to print unsigned quantities.
2002-12-11 15:13:49 +08:00
};
Initial revision
1999-10-08 07:47:09 +08:00
struct s_fixedpt {
always use u_intXX_t for protocol format declaration. char/short/int may not come with exact size. while at it, correct signedness of ip/udp header field. nuke most of the use of bitfield. TODO: bitfield in namser.h
2000-10-03 10:54:54 +08:00
u_int16_t int_part;
u_int16_t fraction;
The "__attribute__((packed))" tag on structures causes some files not to compile with Sun C, as "interface.h" isn't being included before the structures are being declared. Furthermore, in the files that Sun C *can* compile, it doesn't cause Sun C to generate code that's safe with unaligned accesses, as "__attribute__" is defined as a do-nothing macro with compilers that don't support it. Therefore, we get rid of that tag on the structures to which it was added, and instead use "EXTRACT_16BIT()" and "EXTRACT_32BIT()" to fetch 16-bit and 32-bit big-endian quantities from packets. We also fix some other references to multi-byte quantities to get rid of code that tries to do unaligned loads on platforms that don't support them. We also throw in a hack that makes those macros use "__attribute__((packed))" on structures containing only one 16-bit or 32-bit integer to get the compiler to generate unaligned-safe code rather than doing it by hand. (GCC on SPARC produces the same code that doing it by hand does; I don't know if GCC on any other big-endian strict-alignment processor generates better code for that case. On little-endian processors, as "ntohs()" and "ntohl()" might be functions, that might actually produce worse code.) Fix some places to use "%u" rather than "%d" to print unsigned quantities.
2002-12-11 15:13:49 +08:00
};
Initial revision
1999-10-08 07:47:09 +08:00
provide decent multipline output for the NTP printer
2004-01-28 22:34:50 +08:00
/* rfc2030
* 1 2 3
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* |LI | VN |Mode | Stratum | Poll | Precision |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Root Delay |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Root Dispersion |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reference Identifier |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* | Reference Timestamp (64) |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* | Originate Timestamp (64) |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* | Receive Timestamp (64) |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* | Transmit Timestamp (64) |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Key Identifier (optional) (32) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* | |
* | Message Digest (optional) (128) |
* | |
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
Initial revision
1999-10-08 07:47:09 +08:00
struct ntpdata {
u_char status; /* status of local clock and leap info */
u_char stratum; /* Stratum level */
u_char ppoll; /* poll value */
int precision:8;
provide decent multipline output for the NTP printer
2004-01-28 22:34:50 +08:00
struct s_fixedpt root_delay;
struct s_fixedpt root_dispersion;
Initial revision
1999-10-08 07:47:09 +08:00
u_int32_t refid;
provide decent multipline output for the NTP printer
2004-01-28 22:34:50 +08:00
struct l_fixedpt ref_timestamp;
struct l_fixedpt org_timestamp;
struct l_fixedpt rec_timestamp;
struct l_fixedpt xmt_timestamp;
u_int32_t key_id;
u_int8_t message_digest[16];
The "__attribute__((packed))" tag on structures causes some files not to compile with Sun C, as "interface.h" isn't being included before the structures are being declared. Furthermore, in the files that Sun C *can* compile, it doesn't cause Sun C to generate code that's safe with unaligned accesses, as "__attribute__" is defined as a do-nothing macro with compilers that don't support it. Therefore, we get rid of that tag on the structures to which it was added, and instead use "EXTRACT_16BIT()" and "EXTRACT_32BIT()" to fetch 16-bit and 32-bit big-endian quantities from packets. We also fix some other references to multi-byte quantities to get rid of code that tries to do unaligned loads on platforms that don't support them. We also throw in a hack that makes those macros use "__attribute__((packed))" on structures containing only one 16-bit or 32-bit integer to get the compiler to generate unaligned-safe code rather than doing it by hand. (GCC on SPARC produces the same code that doing it by hand does; I don't know if GCC on any other big-endian strict-alignment processor generates better code for that case. On little-endian processors, as "ntohs()" and "ntohl()" might be functions, that might actually produce worse code.) Fix some places to use "%u" rather than "%d" to print unsigned quantities.
2002-12-11 15:13:49 +08:00
};
Initial revision
1999-10-08 07:47:09 +08:00
/*
* Leap Second Codes (high order two bits)
*/
#define NO_WARNING 0x00 /* no warning */
#define PLUS_SEC 0x40 /* add a second (61 seconds) */
#define MINUS_SEC 0x80 /* minus a second (59 seconds) */
#define ALARM 0xc0 /* alarm condition (clock unsynchronized) */
/*
* Clock Status Bits that Encode Version
*/
#define NTPVERSION_1 0x08
#define VERSIONMASK 0x38
#define LEAPMASK 0xc0
#define MODEMASK 0x07
/*
* Code values
*/
#define MODE_UNSPEC 0 /* unspecified */
#define MODE_SYM_ACT 1 /* symmetric active */
#define MODE_SYM_PAS 2 /* symmetric passive */
#define MODE_CLIENT 3 /* client */
#define MODE_SERVER 4 /* server */
#define MODE_BROADCAST 5 /* broadcast */
#define MODE_RES1 6 /* reserved */
#define MODE_RES2 7 /* reserved */
/*
* Stratum Definitions
*/
#define UNSPECIFIED 0
#define PRIM_REF 1 /* radio clock */
#define INFO_QUERY 62 /* **** THIS implementation dependent **** */
#define INFO_REPLY 63 /* **** THIS implementation dependent **** */
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