libcli/dns/libdns.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Small async DNS library for Samba with socketwrapper support
   5
   6    Copyright (C) 2012 Kai Blin  <kai@samba.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef __LIBDNS_H__
  23 #define __LIBDNS_H__
  24
  25 /** Send an dns request to a dns server using UDP
  26  *
  27  *@param mem_ctx        talloc memory context to use
  28  *@param ev             tevent context to use
  29  *@param server_address address of the server as a string
  30  *@param query          dns query to send
  31  *@param query_len      length of the query
  32  *@return tevent_req with the active request or NULL on out-of-memory
  33  */
  34 struct tevent_req *dns_udp_request_send(TALLOC_CTX *mem_ctx,
  35                                         struct tevent_context *ev,
  36                                         const char *server_address,
  37                                         const uint8_t *query,
  38                                         size_t query_len);
  39
  40 /** Get the dns response from a dns server via UDP
  41  *
  42  *@param req       tevent_req struct returned from dns_request_send
  43  *@param mem_ctx   talloc memory context to use for the reply string
  44  *@param reply     buffer that will be allocated and filled with the dns reply
  45  *@param reply_len length of the reply buffer
  46  *@return 0/errno
  47  */
  48 int dns_udp_request_recv(struct tevent_req *req,
  49                          TALLOC_CTX *mem_ctx,
  50                          uint8_t **reply,
  51                          size_t *reply_len);
  52
  53 #endif /*__LIBDNS_H__*/