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/* dns helper functions by smiler / teso
* requires bind 8.x headers now
*/
#ifndef DNSLIB_H
#define DNSLIB_H
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <arpa/nameser.h>
/* little endian macros */
#define NS_LPUT16(s, blah) { \
u_char *p = blah; \
*(u_int16_t *)p = s; \
blah += 2; \
}
#define NS_LPUT32(s, blah) { \
u_char *p = blah; \
*(u_int32_t *)p = s; \
blah += 4; \
}
/* make a fully blown query packet */
int dns_mkquery (char *name, u_char *buffer, u_int16_t id, ns_type type, ns_class klass);
/* make a query record */
int dns_mkqbody (char *name, u_char *buffer, ns_type type, ns_class klass);
/* convert to dns names, i.e. www.yahoo.com ==> \003www\005yahoo\003com\000 */
int dns_mkdn (char *in, u_char *out);
/* uncompress (unchecked) a dns name */
int dns_dn_expand (u_char *in, char *out, u_char *msg);
/* make a long dns name fragment (without terminating \000)
* provided length > 1
*/
int dns_mklongdn (u_char *cp, int length);
/* print debug information to stderr
*/
void dns_debug (unsigned char *buf);
typedef struct {
u_int16_t type;
u_int16_t klass;
u_int32_t ttl;
u_int16_t rdlength;
} rrec_body;
/* create a resource record */
int dns_mkrr (char *name, u_char *buf, ns_type type, ns_class klass,
char *rdata, u_int32_t ttl);
#endif /* DNSLIB_H */
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