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/*
Unix SMB/CIFS implementation.
Small async DNS library for Samba with socketwrapper support
Copyright (C) 2012 Kai Blin <kai@samba.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __LIBDNS_H__
#define __LIBDNS_H__
#include "lib/util/data_blob.h"
#include "lib/util/time.h"
#include "librpc/gen_ndr/dns.h"
/** Send an dns request to a dns server using UDP
*
*@param mem_ctx talloc memory context to use
*@param ev tevent context to use
*@param server_address address of the server as a string
*@param query dns query to send
*@param query_len length of the query
*@return tevent_req with the active request or NULL on out-of-memory
*/
struct tevent_req *dns_udp_request_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *server_address,
const uint8_t *query,
size_t query_len);
/** Get the dns response from a dns server via UDP
*
*@param req tevent_req struct returned from dns_udp_request_send
*@param mem_ctx talloc memory context to use for the reply string
*@param reply buffer that will be allocated and filled with the dns reply
*@param reply_len length of the reply buffer
*@return 0/errno
*/
int dns_udp_request_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t **reply,
size_t *reply_len);
struct tevent_req *dns_tcp_request_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *server_addr_string,
const uint8_t *query,
size_t query_len);
int dns_tcp_request_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t **reply,
size_t *reply_len);
/*
* DNS request with fallback to TCP on truncation
*/
struct tevent_req *dns_cli_request_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *nameserver,
const char *name,
enum dns_qclass qclass,
enum dns_qtype qtype);
int dns_cli_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
struct dns_name_packet **reply);
#endif /*__LIBDNS_H__*/
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