samba-mirror/source3/winbindd/wb_lookupname.c

/*
   Unix SMB/CIFS implementation.
   async lookupname
   Copyright (C) Volker Lendecke 2009

   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 "../libcli/security/security.h"

struct wb_lookupname_state {
	struct tevent_context *ev;
	const char *dom_name;
	const char *name;
	uint32_t flags;
	struct dom_sid sid;
	enum lsa_SidType type;
};

static void wb_lookupname_done(struct tevent_req *subreq);
static void wb_lookupname_root_done(struct tevent_req *subreq);

struct tevent_req *wb_lookupname_send(TALLOC_CTX *mem_ctx,
				      struct tevent_context *ev,
				      const char *dom_name, const char *name,
				      uint32_t flags)
{
	struct tevent_req *req, *subreq;
	struct wb_lookupname_state *state;
	struct winbindd_domain *domain;

	req = tevent_req_create(mem_ctx, &state, struct wb_lookupname_state);
	if (req == NULL) {
		return NULL;
	}
	state->ev = ev;
	state->flags = flags;

	/*
	 * Uppercase domain and name so that we become cache-friendly
	 */
	state->dom_name = talloc_strdup_upper(state, dom_name);
	if (tevent_req_nomem(state->dom_name, req)) {
		return tevent_req_post(req, ev);
	}
	state->name = talloc_strdup_upper(state, name);
	if (tevent_req_nomem(state->name, req)) {
		return tevent_req_post(req, ev);
	}

	domain = find_lookup_domain_from_name(state->dom_name);
	if (domain == NULL) {
		DEBUG(5, ("Could not find domain for %s\n", state->dom_name));
		tevent_req_nterror(req, NT_STATUS_NONE_MAPPED);
		return tevent_req_post(req, ev);
	}

	subreq = dcerpc_wbint_LookupName_send(
		state, ev, dom_child_handle(domain),
		state->dom_name, state->name,
		flags, &state->type, &state->sid);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, wb_lookupname_done, req);
	return req;
}

static void wb_lookupname_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct wb_lookupname_state *state = tevent_req_data(
		req, struct wb_lookupname_state);
	struct winbindd_domain *root_domain;
	NTSTATUS status, result;

	status = dcerpc_wbint_LookupName_recv(subreq, state, &result);
	TALLOC_FREE(subreq);
	if (tevent_req_nterror(req, status)) {
		return;
	}
	if (NT_STATUS_IS_OK(result)) {
		tevent_req_done(req);
		return;
	}

	/*
	 * "our" DC did not find it, lets retry with the forest root
	 * domain
	 */

	root_domain = find_root_domain();
	if (root_domain == NULL) {
		tevent_req_nterror(req, result);
		return;
	}

	subreq = dcerpc_wbint_LookupName_send(
		state, state->ev, dom_child_handle(root_domain),
		state->dom_name,
		state->name, state->flags, &state->type, &state->sid);
	if (tevent_req_nomem(subreq, req)) {
		return;
	}
	tevent_req_set_callback(subreq, wb_lookupname_root_done, req);
}

static void wb_lookupname_root_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct wb_lookupname_state *state = tevent_req_data(
		req, struct wb_lookupname_state);
	NTSTATUS status, result;

	status = dcerpc_wbint_LookupName_recv(subreq, state, &result);
	TALLOC_FREE(subreq);
	if (any_nt_status_not_ok(status, result, &status)) {
		tevent_req_nterror(req, status);
		return;
	}
	tevent_req_done(req);
}

NTSTATUS wb_lookupname_recv(struct tevent_req *req, struct dom_sid *sid,
			    enum lsa_SidType *type)
{
	struct wb_lookupname_state *state = tevent_req_data(
		req, struct wb_lookupname_state);
	NTSTATUS status;

	if (tevent_req_is_nterror(req, &status)) {
		return status;
	}
	sid_copy(sid, &state->sid);
	*type = state->type;
	return NT_STATUS_OK;
}