source: vendor/current/source3/winbindd/wb_dsgetdcname.c

/*
   Unix SMB/CIFS implementation.
   async dsgetdcname
   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_winbind_c.h"

struct wb_dsgetdcname_state {
        struct netr_DsRGetDCNameInfo *dcinfo;
};

static void wb_dsgetdcname_done(struct tevent_req *subreq);

struct tevent_req *wb_dsgetdcname_send(TALLOC_CTX *mem_ctx,
                                       struct tevent_context *ev,
                                       const char *domain_name,
                                       const struct GUID *domain_guid,
                                       const char *site_name,
                                       uint32_t flags)
{
        struct tevent_req *req, *subreq;
        struct wb_dsgetdcname_state *state;
        struct winbindd_child *child;
        struct GUID guid;
        struct GUID *guid_ptr = NULL;

        req = tevent_req_create(mem_ctx, &state, struct wb_dsgetdcname_state);
        if (req == NULL) {
                return NULL;
        }

        if (strequal(domain_name, "BUILTIN")) {
                /*
                 * This makes no sense
                 */
                tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND);
                return tevent_req_post(req, ev);
        }

        if (strequal(domain_name, get_global_sam_name())) {
                int role = lp_server_role();
                if ( role != ROLE_ACTIVE_DIRECTORY_DC ) {
                        /*
                         * Two options here: Give back our own address, or say there's
                         * nobody around. Right now opting for the latter, one measure
                         * to prevent the loopback connects. This might change if
                         * needed.
                         */
                        tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND);
                        return tevent_req_post(req, ev);
                }
        }

        if (IS_DC) {
                /*
                 * We have to figure out the DC ourselves
                 */
                child = locator_child();
        } else {
                struct winbindd_domain *domain = find_our_domain();
                child = choose_domain_child(domain);
        }

        if (domain_guid != NULL) {
                /* work around a const issue in rpccli_ autogenerated code */
                guid = *domain_guid;
                guid_ptr = &guid;
        }

        subreq = dcerpc_wbint_DsGetDcName_send(
                state, ev, child->binding_handle, domain_name, guid_ptr, site_name,
                flags, &state->dcinfo);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, wb_dsgetdcname_done, req);
        return req;
}

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

        status = dcerpc_wbint_DsGetDcName_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_dsgetdcname_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
                             struct netr_DsRGetDCNameInfo **pdcinfo)
{
        struct wb_dsgetdcname_state *state = tevent_req_data(
                req, struct wb_dsgetdcname_state);
        NTSTATUS status;

        if (tevent_req_is_nterror(req, &status)) {
                return status;
        }
        *pdcinfo = talloc_move(mem_ctx, &state->dcinfo);
        return NT_STATUS_OK;
}