source: vendor/current/source3/winbindd/wb_gid2sid.c

/*
   Unix SMB/CIFS implementation.
   async gid2sid
   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"
#include "idmap_cache.h"
#include "idmap.h"
#include "../libcli/security/security.h"

struct wb_gid2sid_state {
        struct tevent_context *ev;
        struct dom_sid sid;
};

static void wb_gid2sid_done(struct tevent_req *subreq);

struct tevent_req *wb_gid2sid_send(TALLOC_CTX *mem_ctx,
                                   struct tevent_context *ev,
                                   gid_t gid)
{
        struct tevent_req *req, *subreq;
        struct wb_gid2sid_state *state;
        struct winbindd_child *child;
        bool expired;

        req = tevent_req_create(mem_ctx, &state, struct wb_gid2sid_state);
        if (req == NULL) {
                return NULL;
        }

        if (winbindd_use_idmap_cache()
            && idmap_cache_find_gid2sid(gid, &state->sid, &expired)) {

                DEBUG(10, ("idmap_cache_find_gid2sid found %d%s\n",
                           (int)gid, expired ? " (expired)": ""));

                if (!expired || idmap_is_offline()) {
                        if (is_null_sid(&state->sid)) {
                                tevent_req_nterror(req,
                                                   NT_STATUS_NONE_MAPPED);
                        } else {
                                tevent_req_done(req);
                        }
                        return tevent_req_post(req, ev);
                }
        }

        child = idmap_child();

        subreq = dcerpc_wbint_Gid2Sid_send(
                state, ev, child->binding_handle,
                gid, &state->sid);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, wb_gid2sid_done, req);
        return req;
}

static void wb_gid2sid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct wb_gid2sid_state *state = tevent_req_data(
                req, struct wb_gid2sid_state);
        NTSTATUS status, result;

        status = dcerpc_wbint_Gid2Sid_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_gid2sid_recv(struct tevent_req *req, struct dom_sid *sid)
{
        struct wb_gid2sid_state *state = tevent_req_data(
                req, struct wb_gid2sid_state);
        NTSTATUS status;

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