/* !!! Lobotomized for public release */

/* 1996 Thomas H. Ptacek, the RDIST organization */

#include "dns-rr.h"

/* --------------------------------------------------------------------- */

/* A DNS query is a resource record with no data (and hence no length specifier).
 * All queries share the same format. 
 */

int
dns_rr_query_len(char *name, int type, u_char *buf) {
	return(strlen(name) + 1 + 4);
}

int 
dns_rr_query(char *name, int type, u_char *buf) {
	int len;

	u_char *dp = buf;

	len = dns_string(name, dp, MAXDNAME);
	if(len < 0)
		return(0);

	dp += len;

	PUTSHORT(type, dp);
	len += 2;

	PUTSHORT(C_IN, dp);
	len += 2;

	return(len);
}

/* --------------------------------------------------------------------- */

/* skip over the compressed name in "buf", returning an error if it's badly encoded
 * and runs over the end-of-packet specified by "eop".
 */
	
u_char *dns_skip(u_char *buf, u_char *eop) {
	int l;

	/* jump from length byte to length byte */

	for(l = *buf; l; buf += (l + 1)) {
		l = *buf;
		if((buf + l + 1) > eop)
			return(NULL);
	}

	return(buf);
}

/* --------------------------------------------------------------------- */

int 
dns_string(char *string, u_char *buf, int size) {
	return(dn_comp(string, buf, size, NULL, NULL));	
}