/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Written by Thorsten Lockert <tholo@trollphone.org>
 *
 * Funding provided by Troll Phone Networks AS
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 * \brief DNS support for Asterisk
 * \author Thorsten Lockert <tholo@trollphone.org>
 */

#ifndef _ASTERISK_DNS_H
#define _ASTERISK_DNS_H

/*!	\brief	Perform DNS lookup (used by DNS, enum and SRV lookups)
	\param	context
	\param	dname	Domain name to lookup (host, SRV domain, TXT record name)
	\param	class	Record Class (see "man res_search")
	\param	type	Record type (see "man res_search")
	\param	callback Callback function for handling DNS result
	\note   Asterisk DNS is synchronus at this time. This means that if your DNS
		services does not work, Asterisk may lock while waiting for response.
*/
int ast_search_dns(void *context, const char *dname, int class, int type,
	 int (*callback)(void *context, unsigned char *answer, int len, unsigned char *fullanswer));

/*! \brief Retrieve the configured nameservers of the system */
struct ao2_container *ast_dns_get_nameservers(void);

#endif /* _ASTERISK_DNS_H */
