s4 dns: Add a simple async client library

1 files changed, 53 insertions, 0 deletions

diff --git a/libcli/dns/libdns.h b/libcli/dns/libdns.h
new file mode 100644
index 0000000000..31474ebc53
--- /dev/null
+++ b/libcli/dns/libdns.h
@@ -0,0 +1,53 @@
+/*
+   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__
+
+/** 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_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 WERROR code depending on the async request result
+ */
+WERROR dns_udp_request_recv(struct tevent_req *req,
+			    TALLOC_CTX *mem_ctx,
+			    uint8_t **reply,
+			    size_t *reply_len);
+
+#endif /*__LIBDNS_H__*/