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/*
* src/database.c
* (c) 2021 Jonas Gunz <himself@jonasgunz.de>
* License: MIT
*/
#include "database.h"
int database_init ( database_t* _database ) {
unsigned int i = 0;
size_t rr_size;
if ( !_database )
return 1;
/* Initialize 2D array of tree_node pointers, paranoia style */
if ( !( _database->zone = malloc( sizeof( tree_node_t** ) * DB_CLASS_LEN ) ) )
return 1;
rr_size = sizeof( struct tree_node* ) * DB_RR_LEN;
for ( i = 0; i < DB_CLASS_LEN; i++ ) {
if ( !( _database->zone[i] = malloc( rr_size ) ) )
return 1;
memset( _database->zone[i], 0, rr_size );
}
return 0;
}
int database_destroy ( database_t* _database ) {
unsigned int i, o;
if ( !_database || !_database->zone )
return 1;
for ( i = 0; i < DB_CLASS_LEN; i++ ) {
for ( o = 0; o < DB_RR_LEN; o++ ) {
/* TODO should we free data and key? */
tree_destroy( &_database->zone[i][o], _TREE_FREE_DATA | _TREE_FREE_KEY );
}
free( _database->zone[i] );
}
free( _database->zone );
_database->zone = NULL;
return 1;
}
int database_query (
database_rdata_t* _rdata,
database_t* _database,
const char* _qname,
int _qname_len,
uint16_t _qtype,
uint16_t _qclass
) {
uint16_t type, class;
void* data;
/* _qtype and _qclass start at 1, so they are invalid when 0. */
if ( !_rdata || !_database || !_qname || !_qtype || !_qclass || _qname_len <= 0 ) {
LOGPRINTF(_LOG_ERROR, "Invalid arguments");
return 1;
}
if ( _qtype >= DB_RR_LEN || _qclass >= DB_RR_LEN ) {
LOGPRINTF(_LOG_DEBUG, "Invalid qtype/qclass");
return 1;
}
_rdata->ttl = 0;
_rdata->rdlen = 0;
_rdata->rdata = NULL;
type = _qtype - 1;
class = _qclass - 1;
data = tree_get( &_database->zone[class][type], _qname );
if ( !data ) {
LOGPRINTF(_LOG_DEBUG, "No matching RR found");
return 2;
}
_rdata->ttl = *( (uint32_t*) data );
_rdata->rdlen = *( (uint16_t*)(data + 4) );
_rdata->rdata = data + 6;
return 0;
}
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