source: branches/samba-3.5.x/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/cli_wbint.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 = rpccli_wbint_LookupName_send(
                state, ev, domain->child.rpccli, 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 = rpccli_wbint_LookupName_recv(subreq, state, &result);
        TALLOC_FREE(subreq);
        if (!NT_STATUS_IS_OK(status)) {
                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 = rpccli_wbint_LookupName_send(
                state, state->ev, root_domain->child.rpccli, 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 = rpccli_wbint_LookupName_recv(subreq, state, &result);
        TALLOC_FREE(subreq);
        if (!NT_STATUS_IS_OK(status)) {
                tevent_req_nterror(req, status);
                return;
        }
        if (!NT_STATUS_IS_OK(result)) {
                tevent_req_nterror(req, result);
                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;
}