source: trunk/server/source3/winbindd/winbindd_getgrent.c@ 898

/*
   Unix SMB/CIFS implementation.
   async implementation of WINBINDD_GETGRENT
   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"

struct winbindd_getgrent_state {
        struct tevent_context *ev;
        struct winbindd_cli_state *cli;
        int max_groups;
        int num_groups;
        struct winbindd_gr *groups;
        struct talloc_dict **members;
};

static void winbindd_getgrent_done(struct tevent_req *subreq);

struct tevent_req *winbindd_getgrent_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_getgrent_state *state;

        req = tevent_req_create(mem_ctx, &state,
                                struct winbindd_getgrent_state);
        if (req == NULL) {
                return NULL;
        }
        state->ev = ev;
        state->num_groups = 0;
        state->cli = cli;

        DEBUG(3, ("[%5lu]: getgrent\n", (unsigned long)cli->pid));

        if (!lp_winbind_enum_groups()) {
                tevent_req_nterror(req, NT_STATUS_NO_MORE_ENTRIES);
                return tevent_req_post(req, ev);
        }

        if (cli->grent_state == NULL) {
                tevent_req_nterror(req, NT_STATUS_NO_MORE_ENTRIES);
                return tevent_req_post(req, ev);
        }

        state->max_groups = MIN(500, request->data.num_entries);
        if (state->max_groups == 0) {
                tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
                return tevent_req_post(req, ev);
        }

        state->groups = talloc_zero_array(state, struct winbindd_gr,
                                          state->max_groups);
        if (tevent_req_nomem(state->groups, req)) {
                return tevent_req_post(req, ev);
        }

        state->members = talloc_array(state, struct talloc_dict *,
                                      state->max_groups);
        if (tevent_req_nomem(state->members, req)) {
                TALLOC_FREE(state->groups);
                return tevent_req_post(req, ev);
        }

        subreq = wb_next_grent_send(state, ev, lp_winbind_expand_groups(),
                                    cli->grent_state,
                                    &state->groups[state->num_groups]);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, winbindd_getgrent_done, req);
        return req;
}