source: trunk/server/source3/winbindd/winbindd_getgrgid.c

/*
   Unix SMB/CIFS implementation.
   async implementation of WINBINDD_GETGRGID
   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_getgrgid_state {
        struct tevent_context *ev;
        struct dom_sid sid;
        const char *domname;
        const char *name;
        gid_t gid;
        struct talloc_dict *members;
};

static void winbindd_getgrgid_gid2sid_done(struct tevent_req *subreq);
static void winbindd_getgrgid_done(struct tevent_req *subreq);

struct tevent_req *winbindd_getgrgid_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_getgrgid_state *state;

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

        DEBUG(3, ("getgrgid %d\n", (int)request->data.gid));

        subreq = wb_gid2sid_send(state, ev, request->data.gid);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, winbindd_getgrgid_gid2sid_done,
                                req);
        return req;
}

static void winbindd_getgrgid_gid2sid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct winbindd_getgrgid_state *state = tevent_req_data(
                req, struct winbindd_getgrgid_state);
        NTSTATUS status;

        status = wb_gid2sid_recv(subreq, &state->sid);
        TALLOC_FREE(subreq);
        if (tevent_req_nterror(req, status)) {
                return;
        }

        subreq = wb_getgrsid_send(state, state->ev, &state->sid,
                                  lp_winbind_expand_groups());
        if (tevent_req_nomem(subreq, req)) {
                return;
        }
        tevent_req_set_callback(subreq, winbindd_getgrgid_done, req);
}

static void winbindd_getgrgid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct winbindd_getgrgid_state *state = tevent_req_data(
                req, struct winbindd_getgrgid_state);
        NTSTATUS status;

        status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
                                  &state->gid, &state->members);
        TALLOC_FREE(subreq);
        if (tevent_req_nterror(req, status)) {
                return;
        }
        tevent_req_done(req);
}

NTSTATUS winbindd_getgrgid_recv(struct tevent_req *req,
                                struct winbindd_response *response)
{
        struct winbindd_getgrgid_state *state = tevent_req_data(
                req, struct winbindd_getgrgid_state);
        NTSTATUS status;
        int num_members;
        char *buf;

        if (tevent_req_is_nterror(req, &status)) {
                DEBUG(5, ("Could not convert sid %s: %s\n",
                          sid_string_dbg(&state->sid), nt_errstr(status)));
                return status;
        }

        if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
                        state->name, state->gid)) {
                DEBUG(5, ("fill_grent failed\n"));
                return NT_STATUS_NO_MEMORY;
        }

        status = winbindd_print_groupmembers(state->members, response,
                                             &num_members, &buf);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        response->data.gr.num_gr_mem = (uint32)num_members;

        /* Group membership lives at start of extra data */

        response->data.gr.gr_mem_ofs = 0;
        response->extra_data.data = buf;
        response->length += talloc_get_size(response->extra_data.data);

        return NT_STATUS_OK;
}