s3: Convert WINBINDD_WINS_BYNAME to the async API

1 files changed, 149 insertions, 0 deletions

diff --git a/source3/winbindd/winbindd_wins_byname.c b/source3/winbindd/winbindd_wins_byname.c
new file mode 100644
index 0000000000..ad642d479d
--- /dev/null
+++ b/source3/winbindd/winbindd_wins_byname.c
@@ -0,0 +1,149 @@
+/*
+   Unix SMB/CIFS implementation.
+   async implementation of WINBINDD_WINS_BYNAME
+   Copyright (C) Volker Lendecke 2011
+
+   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/>.
+*/
+
+#include "includes.h"
+#include "winbindd.h"
+#include "librpc/gen_ndr/ndr_wbint_c.h"
+#include "libsmb/nmblib.h"
+#include "lib/util/string_wrappers.h"
+
+struct winbindd_wins_byname_state {
+	struct tevent_context *ev;
+	struct winbindd_request *request;
+	struct sockaddr_storage *addrs;
+	int num_addrs;
+};
+
+static void winbindd_wins_byname_wins_done(struct tevent_req *subreq);
+static void winbindd_wins_byname_bcast_done(struct tevent_req *subreq);
+
+struct tevent_req *winbindd_wins_byname_send(TALLOC_CTX *mem_ctx,
+					     struct tevent_context *ev,
+					     struct winbindd_cli_state *cli,
+					     struct winbindd_request *request)
+{
+	struct tevent_req *req, *subreq;
+	struct winbindd_wins_byname_state *state;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct winbindd_wins_byname_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->ev = ev;
+	state->request = request;
+
+	/* Ensure null termination */
+	request->data.winsreq[sizeof(request->data.winsreq)-1]='\0';
+
+	DEBUG(3, ("[%5lu]: wins_byname %s\n", (unsigned long)cli->pid,
+		  request->data.winsreq));
+
+	subreq = resolve_wins_send(state, ev, state->request->data.winsreq,
+				   0x20);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, winbindd_wins_byname_wins_done, req);
+	return req;
+}
+
+static void winbindd_wins_byname_wins_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct winbindd_wins_byname_state *state = tevent_req_data(
+		req, struct winbindd_wins_byname_state);
+	NTSTATUS status;
+
+	status = resolve_wins_recv(subreq, talloc_tos(), &state->addrs,
+				   &state->num_addrs, NULL);
+	TALLOC_FREE(subreq);
+	if (NT_STATUS_IS_OK(status)) {
+		tevent_req_done(req);
+		return;
+	}
+	subreq = name_resolve_bcast_send(state, state->ev,
+					 state->request->data.winsreq, 0x20);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, winbindd_wins_byname_bcast_done, req);
+}
+
+static void winbindd_wins_byname_bcast_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct winbindd_wins_byname_state *state = tevent_req_data(
+		req, struct winbindd_wins_byname_state);
+	NTSTATUS status;
+
+	status = name_resolve_bcast_recv(subreq, talloc_tos(), &state->addrs,
+					 &state->num_addrs);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+	tevent_req_done(req);
+}
+
+NTSTATUS winbindd_wins_byname_recv(struct tevent_req *req,
+				   struct winbindd_response *presp)
+{
+	struct winbindd_wins_byname_state *state = tevent_req_data(
+		req, struct winbindd_wins_byname_state);
+	char *response;
+	NTSTATUS status;
+	int i;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+
+	response = talloc_strdup(talloc_tos(), "");
+	if (response == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	for (i=0; i<state->num_addrs; i++) {
+		char addr[INET6_ADDRSTRLEN];
+		print_sockaddr(addr, sizeof(addr), &state->addrs[i]);
+
+		response = talloc_asprintf_append_buffer(
+			response, "%s\t", addr);
+		if (response == NULL) {
+			return NT_STATUS_NO_MEMORY;
+		}
+	}
+
+	response = talloc_asprintf_append_buffer(
+		response, "%s\n", state->request->data.winsreq);
+	if (response == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (talloc_get_size(response) > sizeof(presp->data.winsresp)) {
+		TALLOC_FREE(response);
+		return NT_STATUS_MARSHALL_OVERFLOW;
+	}
+	fstrcpy(presp->data.winsresp, response);
+	TALLOC_FREE(response);
+	return NT_STATUS_OK;
+}