parseutil.c File Reference

Utility functions for parsing, base32(DNS variant) and base64 encoding and decoding, Hex, Time units, Escape codes. More...

#include "config.h"
#include "sldns/parseutil.h"
#include <sys/time.h>
#include <time.h>
#include <ctype.h>

Macros
#define	LDNS_MOD(x, y)   (((x) % (y) < 0) ? ((x) % (y) + (y)) : ((x) % (y)))
#define	LDNS_DIV(x, y)   (((x) % (y) < 0) ? ((x) / (y) - 1 ) : ((x) / (y)))

Functions
sldns_lookup_table *	sldns_lookup_by_name (sldns_lookup_table *table, const char *name)
sldns_lookup_table *	sldns_lookup_by_id (sldns_lookup_table *table, int id)
static int	is_leap_year (int year)
static int	leap_days (int y1, int y2)
time_t	sldns_mktime_from_utc (const struct tm *tm)
	Convert TM to seconds since epoch (midnight, January 1st, 1970). More...
static void	sldns_year_and_yday_from_days_since_epoch (int64_t days, struct tm *result)
static void	sldns_mon_and_mday_from_year_and_yday (struct tm *result)
static void	sldns_wday_from_year_and_yday (struct tm *result)
static struct tm *	sldns_gmtime64_r (int64_t clock, struct tm *result)
static int64_t	sldns_serial_arithmetics_time (int32_t time, time_t now)
struct tm *	sldns_serial_arithmetics_gmtime_r (int32_t time, time_t now, struct tm *result)
	The function interprets time as the number of seconds since epoch with respect to now using serial arithmetics (rfc1982). More...
int	sldns_hexdigit_to_int (char ch)
	Returns the int value of the given (hex) digit. More...
uint32_t	sldns_str2period (const char *nptr, const char **endptr, int *overflow)
	converts a ttl value (like 5d2h) to a long. More...
int	sldns_parse_escape (uint8_t *ch_p, const char **str_p)
int	sldns_parse_char (uint8_t *ch_p, const char **str_p)
	parse one character, with escape codes More...
size_t	sldns_b32_ntop_calculate_size (size_t src_data_length)
	calculates the size needed to store the result of b32_ntop
size_t	sldns_b32_ntop_calculate_size_no_padding (size_t src_data_length)
static int	sldns_b32_ntop_base (const uint8_t *src, size_t src_sz, char *dst, size_t dst_sz, int extended_hex, int add_padding)
int	sldns_b32_ntop (const uint8_t *src, size_t src_sz, char *dst, size_t dst_sz)
int	sldns_b32_ntop_extended_hex (const uint8_t *src, size_t src_sz, char *dst, size_t dst_sz)
	This function we get from ldns-compat or from base system it returns the number of data bytes stored at the target, or <0 on error.
size_t	sldns_b32_pton_calculate_size (size_t src_text_length)
	calculates the size needed to store the result of b32_pton
static int	sldns_b32_pton_base (const char *src, size_t src_sz, uint8_t *dst, size_t dst_sz, int extended_hex, int check_padding)
int	sldns_b32_pton (const char *src, size_t src_sz, uint8_t *dst, size_t dst_sz)
int	sldns_b32_pton_extended_hex (const char *src, size_t src_sz, uint8_t *dst, size_t dst_sz)
	This function we get from ldns-compat or from base system it returns the number of data bytes stored at the target, or <0 on error.
size_t	sldns_b64_ntop_calculate_size (size_t srcsize)
	calculates the size needed to store the result of b64_ntop
static int	sldns_b64_ntop_base (uint8_t const *src, size_t srclength, char *target, size_t targsize, int base64url, int padding)
int	sldns_b64_ntop (uint8_t const *src, size_t srclength, char *target, size_t targsize)
int	sldns_b64url_ntop (uint8_t const *src, size_t srclength, char *target, size_t targsize)
size_t	sldns_b64_pton_calculate_size (size_t srcsize)
	calculates the size needed to store the result of sldns_b64_pton
static int	sldns_b64_pton_base (char const *src, size_t srcsize, uint8_t *target, size_t targsize, int base64url)
int	sldns_b64_pton (char const *src, uint8_t *target, size_t targsize)
int	sldns_b64url_pton (char const *src, size_t srcsize, uint8_t *target, size_t targsize)
int	sldns_b64_contains_nonurl (char const *src, size_t srcsize)

Variables
static const int	mdays []
static const int	leap_year_mdays []

Detailed Description

Utility functions for parsing, base32(DNS variant) and base64 encoding and decoding, Hex, Time units, Escape codes.

Function Documentation

sldns_mktime_from_utc()

time_t sldns_mktime_from_utc

(

const struct tm *

tm

)

Convert TM to seconds since epoch (midnight, January 1st, 1970).

Like timegm(3), which is not always available.

Parameters

[in]

tm

a struct tm* with the date

Returns

the seconds since epoch

sldns_serial_arithmetics_gmtime_r()

struct tm* sldns_serial_arithmetics_gmtime_r	(	int32_t	time,
		time_t	now,
		struct tm *	result
	)

The function interprets time as the number of seconds since epoch with respect to now using serial arithmetics (rfc1982).

That number of seconds is then converted to broken-out time information. This is especially useful when converting the inception and expiration fields of RRSIG records.

Parameters

[in]	time	number of seconds since epoch (midnight, January 1st, 1970) to be interpreted as a serial arithmetics number relative to now.
[in]	now	number of seconds since epoch (midnight, January 1st, 1970) to which the time value is compared to determine the final value.
[out]	result	the struct with the broken-out time information

Returns

result on success or NULL on error

sldns_hexdigit_to_int()

int sldns_hexdigit_to_int

(

char

ch

)

Returns the int value of the given (hex) digit.

Parameters

[in]

ch

the hex char to convert

Returns

the converted decimal value

Referenced by hex_pton().

sldns_str2period()

uint32_t sldns_str2period	(	const char *	nptr,
		const char **	endptr,
		int *	overflow
	)

converts a ttl value (like 5d2h) to a long.

Parameters

[in]	nptr	the start of the string
[out]	endptr	points to the last char in case of error
[out]	overflow	returns if the string causes integer overflow error, the number is too big, string of digits too long.

Returns

the convert duration value

Referenced by http_parse_ttl().

sldns_parse_char()

int sldns_parse_char	(	uint8_t *	ch_p,
		const char **	str_p
	)

parse one character, with escape codes

Parse one character, with escape codes,.

Variable Documentation

mdays

const int mdays[]

static

Initial value:

= {
        31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
}

leap_year_mdays

const int leap_year_mdays[]

static

Initial value:

= {
        31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
}