ldns  1.7.0
Data Structures | Macros | Typedefs | Functions
util.h File Reference

Go to the source code of this file.

Data Structures

struct  ldns_schwartzian_compare_struct
 Structure to do a Schwartzian-like transformation, for instance when sorting. More...
 
struct  ldns_struct_lookup_table
 A general purpose lookup table. More...
 

Macros

#define dprintf(X, Y)   fprintf(stderr, (X), (Y))
 
#define LDNS_VERSION   "1.7.0"
 
#define LDNS_REVISION   ((1<<16)|(7<<8)|(0))
 
#define INLINE   static inline
 splint static inline workaround More...
 
#define LDNS_MALLOC(type)   LDNS_XMALLOC(type, 1)
 Memory management macros. More...
 
#define LDNS_XMALLOC(type, count)   ((type *) malloc((count) * sizeof(type)))
 
#define LDNS_CALLOC(type, count)   ((type *) calloc((count), sizeof(type)))
 
#define LDNS_REALLOC(ptr, type)   LDNS_XREALLOC((ptr), type, 1)
 
#define LDNS_XREALLOC(ptr, type, count)   ((type *) realloc((ptr), (count) * sizeof(type)))
 
#define LDNS_FREE(ptr)   do { free((ptr)); (ptr) = NULL; } while (0)
 
#define LDNS_DEP   printf("DEPRECATED FUNCTION!\n");
 

Typedefs

typedef struct ldns_struct_lookup_table ldns_lookup_table
 

Functions

ldns_lookup_tableldns_lookup_by_name (ldns_lookup_table table[], const char *name)
 Looks up the table entry by name, returns NULL if not found. More...
 
ldns_lookup_tableldns_lookup_by_id (ldns_lookup_table table[], int id)
 Looks up the table entry by id, returns NULL if not found. More...
 
int ldns_get_bit (uint8_t bits[], size_t index)
 Returns the value of the specified bit The bits are counted from left to right, so bit #0 is the left most bit. More...
 
int ldns_get_bit_r (uint8_t bits[], size_t index)
 Returns the value of the specified bit The bits are counted from right to left, so bit #0 is the right most bit. More...
 
void ldns_set_bit (uint8_t *byte, int bit_nr, signed char value)
 sets the specified bit in the specified byte to 1 if value is true, 0 if false The bits are counted from right to left, so bit #0 is the right most bit. More...
 
int ldns_hexdigit_to_int (char ch)
 Returns the int value of the given (hex) digit. More...
 
char ldns_int_to_hexdigit (int ch)
 Returns the char (hex) representation of the given int. More...
 
int ldns_hexstring_to_data (uint8_t *data, const char *str)
 Converts a hex string to binary data. More...
 
const char * ldns_version (void)
 Show the internal library version. More...
 
time_t ldns_mktime_from_utc (const struct tm *tm)
 Convert TM to seconds since epoch (midnight, January 1st, 1970). More...
 
time_t mktime_from_utc (const struct tm *tm)
 
struct tm * ldns_serial_arithmitics_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 arithmitics (rfc1982). More...
 
int ldns_init_random (FILE *fd, unsigned int size)
 Seed the random function. More...
 
uint16_t ldns_get_random (void)
 Get random number. More...
 
char * ldns_bubblebabble (uint8_t *data, size_t len)
 Encode data as BubbleBabble. More...
 
int ldns_b32_ntop (const uint8_t *src_data, size_t src_data_length, char *target_text_buffer, size_t target_text_buffer_size)
 
int ldns_b32_ntop_extended_hex (const uint8_t *src_data, size_t src_data_length, char *target_text_buffer, size_t target_text_buffer_size)
 
int b32_ntop (const uint8_t *src_data, size_t src_data_length, char *target_text_buffer, size_t target_text_buffer_size)
 
int b32_ntop_extended_hex (const uint8_t *src_data, size_t src_data_length, char *target_text_buffer, size_t target_text_buffer_size)
 
int ldns_b32_pton (const char *src_text, size_t src_text_length, uint8_t *target_data_buffer, size_t target_data_buffer_size)
 
int ldns_b32_pton_extended_hex (const char *src_text, size_t src_text_length, uint8_t *target_data_buffer, size_t target_data_buffer_size)
 
int b32_pton (const char *src_text, size_t src_text_length, uint8_t *target_data_buffer, size_t target_data_buffer_size)
 
int b32_pton_extended_hex (const char *src_text, size_t src_text_length, uint8_t *target_data_buffer, size_t target_data_buffer_size)
 

Macro Definition Documentation

§ dprintf

#define dprintf (   X,
 
)    fprintf(stderr, (X), (Y))

Definition at line 27 of file util.h.

§ LDNS_VERSION

#define LDNS_VERSION   "1.7.0"

Definition at line 30 of file util.h.

§ LDNS_REVISION

#define LDNS_REVISION   ((1<<16)|(7<<8)|(0))

Definition at line 31 of file util.h.

§ INLINE

#define INLINE   static inline

splint static inline workaround

Definition at line 42 of file util.h.

§ LDNS_MALLOC

#define LDNS_MALLOC (   type)    LDNS_XMALLOC(type, 1)

Memory management macros.

Definition at line 49 of file util.h.

§ LDNS_XMALLOC

#define LDNS_XMALLOC (   type,
  count 
)    ((type *) malloc((count) * sizeof(type)))

Definition at line 51 of file util.h.

§ LDNS_CALLOC

#define LDNS_CALLOC (   type,
  count 
)    ((type *) calloc((count), sizeof(type)))

Definition at line 53 of file util.h.

§ LDNS_REALLOC

#define LDNS_REALLOC (   ptr,
  type 
)    LDNS_XREALLOC((ptr), type, 1)

Definition at line 55 of file util.h.

§ LDNS_XREALLOC

#define LDNS_XREALLOC (   ptr,
  type,
  count 
)    ((type *) realloc((ptr), (count) * sizeof(type)))

Definition at line 57 of file util.h.

§ LDNS_FREE

#define LDNS_FREE (   ptr)    do { free((ptr)); (ptr) = NULL; } while (0)

Definition at line 60 of file util.h.

§ LDNS_DEP

#define LDNS_DEP   printf("DEPRECATED FUNCTION!\n");

Definition at line 63 of file util.h.

Typedef Documentation

§ ldns_lookup_table

Definition at line 160 of file util.h.

Function Documentation

§ ldns_lookup_by_name()

ldns_lookup_table* ldns_lookup_by_name ( ldns_lookup_table  table[],
const char *  name 
)

Looks up the table entry by name, returns NULL if not found.

Parameters
[in]tablethe lookup table to search in
[in]namewhat to search for
Returns
the item found

§ ldns_lookup_by_id()

ldns_lookup_table* ldns_lookup_by_id ( ldns_lookup_table  table[],
int  id 
)

Looks up the table entry by id, returns NULL if not found.

Parameters
[in]tablethe lookup table to search in
[in]idwhat to search for
Returns
the item found

§ ldns_get_bit()

int ldns_get_bit ( uint8_t  bits[],
size_t  index 
)

Returns the value of the specified bit The bits are counted from left to right, so bit #0 is the left most bit.

Parameters
[in]bitsarray holding the bits
[in]indexto the wanted bit
Returns

Definition at line 52 of file util.c.

§ ldns_get_bit_r()

int ldns_get_bit_r ( uint8_t  bits[],
size_t  index 
)

Returns the value of the specified bit The bits are counted from right to left, so bit #0 is the right most bit.

Parameters
[in]bitsarray holding the bits
[in]indexto the wanted bit
Returns
1 or 0 depending no the bit state

Definition at line 62 of file util.c.

§ ldns_set_bit()

void ldns_set_bit ( uint8_t *  byte,
int  bit_nr,
signed char  value 
)

sets the specified bit in the specified byte to 1 if value is true, 0 if false The bits are counted from right to left, so bit #0 is the right most bit.

Parameters
[in]bytethe bit to set the bit in
[in]bit_nrthe bit to set (0 <= n <= 7)
[in]valuewhether to set the bit to 1 or 0
Returns
1 or 0 depending no the bit state

§ ldns_hexdigit_to_int()

int ldns_hexdigit_to_int ( char  ch)

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

Parameters
[in]chthe hex char to convert
Returns
the converted decimal value

Definition at line 88 of file util.c.

§ ldns_int_to_hexdigit()

char ldns_int_to_hexdigit ( int  ch)

Returns the char (hex) representation of the given int.

Parameters
[in]chthe int to convert
Returns
the converted hex char

Definition at line 113 of file util.c.

§ ldns_hexstring_to_data()

int ldns_hexstring_to_data ( uint8_t *  data,
const char *  str 
)

Converts a hex string to binary data.

Parameters
[out]dataThe binary result is placed here. At least strlen(str)/2 bytes should be allocated
[in]strThe hex string to convert. This string should not contain spaces
Returns
The number of bytes of converted data, or -1 if one of the arguments * is NULL, or -2 if the string length is not an even number

Definition at line 138 of file util.c.

References ldns_hexdigit_to_int().

§ ldns_version()

const char* ldns_version ( void  )

Show the internal library version.

Returns
a string with the version in it

Definition at line 160 of file util.c.

References LDNS_VERSION.

§ ldns_mktime_from_utc()

time_t ldns_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]tma struct tm* with the date
Returns
the seconds since epoch

Definition at line 194 of file util.c.

§ mktime_from_utc()

time_t mktime_from_utc ( const struct tm *  tm)

Definition at line 219 of file util.c.

References ldns_mktime_from_utc().

§ ldns_serial_arithmitics_gmtime_r()

struct tm* ldns_serial_arithmitics_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 arithmitics (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]timenumber of seconds since epoch (midnight, January 1st, 1970) to be intepreted as a serial arithmitics number relative to now.
[in]nownumber of seconds since epoch (midnight, January 1st, 1970) to which the time value is compared to determine the final value.
[out]resultthe struct with the broken-out time information
Returns
result on success or NULL on error

Definition at line 304 of file util.c.

§ ldns_init_random()

int ldns_init_random ( FILE *  fd,
unsigned int  size 
)

Seed the random function.

If the file descriptor is specified, the random generator is seeded with data from that file. If not, /dev/urandom is used.

applications should call this if they need entropy data within ldns If openSSL is available, it is automatically seeded from /dev/urandom or /dev/random.

If you need more entropy, or have no openssl available, this function MUST be called at the start of the program

If openssl is available, this function just adds more entropy

Parameters
[in]fda file providing entropy data for the seed
[in]sizethe number of bytes to use as entropy data. If this is 0, only the minimal amount is taken (usually 4 bytes)
Returns
0 if seeding succeeds, 1 if it fails

Seed the random function.

If you need more entropy, or have no openssl available, this function MUST be called at the start of the program

If openssl is available, this function just adds more entropy

Definition at line 327 of file util.c.

References LDNS_FREE, and LDNS_XMALLOC.

§ ldns_get_random()

uint16_t ldns_get_random ( void  )

Get random number.

Returns
random number.

Definition at line 400 of file util.c.

§ ldns_bubblebabble()

char* ldns_bubblebabble ( uint8_t *  data,
size_t  len 
)

Encode data as BubbleBabble.

Parameters
[in]dataa pointer to data to be encoded
[in]lensize the number of bytes of data
Returns
a string of BubbleBabble

Definition at line 418 of file util.c.

References ldns_b64_ntop(), ldns_b64_pton(), and LDNS_XMALLOC.

§ ldns_b32_ntop()

int ldns_b32_ntop ( const uint8_t *  src_data,
size_t  src_data_length,
char *  target_text_buffer,
size_t  target_text_buffer_size 
)

Definition at line 582 of file util.c.

§ ldns_b32_ntop_extended_hex()

int ldns_b32_ntop_extended_hex ( const uint8_t *  src_data,
size_t  src_data_length,
char *  target_text_buffer,
size_t  target_text_buffer_size 
)

Definition at line 588 of file util.c.

§ b32_ntop()

int b32_ntop ( const uint8_t *  src_data,
size_t  src_data_length,
char *  target_text_buffer,
size_t  target_text_buffer_size 
)

Definition at line 597 of file util.c.

§ b32_ntop_extended_hex()

int b32_ntop_extended_hex ( const uint8_t *  src_data,
size_t  src_data_length,
char *  target_text_buffer,
size_t  target_text_buffer_size 
)

Definition at line 603 of file util.c.

§ ldns_b32_pton()

int ldns_b32_pton ( const char *  src_text,
size_t  src_text_length,
uint8_t *  target_data_buffer,
size_t  target_data_buffer_size 
)

Definition at line 745 of file util.c.

§ ldns_b32_pton_extended_hex()

int ldns_b32_pton_extended_hex ( const char *  src_text,
size_t  src_text_length,
uint8_t *  target_data_buffer,
size_t  target_data_buffer_size 
)

Definition at line 751 of file util.c.

§ b32_pton()

int b32_pton ( const char *  src_text,
size_t  src_text_length,
uint8_t *  target_data_buffer,
size_t  target_data_buffer_size 
)

Definition at line 760 of file util.c.

§ b32_pton_extended_hex()

int b32_pton_extended_hex ( const char *  src_text,
size_t  src_text_length,
uint8_t *  target_data_buffer,
size_t  target_data_buffer_size 
)

Definition at line 766 of file util.c.