source: vendor/3.6.9/source3/winbindd/winbindd_getgrnam.c

/*
   Unix SMB/CIFS implementation.
   async implementation of WINBINDD_GETGRNAM
   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_getgrnam_state {
        struct tevent_context *ev;
        fstring name_domain, name_group;
        struct dom_sid sid;
        const char *domname;
        const char *name;
        gid_t gid;
        struct talloc_dict *members;
};

static void winbindd_getgrnam_lookupsid_done(struct tevent_req *subreq);
static void winbindd_getgrnam_done(struct tevent_req *subreq);

struct tevent_req *winbindd_getgrnam_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_getgrnam_state *state;
        char *tmp;
        NTSTATUS nt_status;

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

        /* Ensure null termination */
        request->data.groupname[sizeof(request->data.groupname)-1]='\0';

        DEBUG(3, ("getgrnam %s\n", request->data.groupname));

        nt_status = normalize_name_unmap(state, request->data.groupname, &tmp);
        /* If we didn't map anything in the above call, just reset the
           tmp pointer to the original string */
        if (!NT_STATUS_IS_OK(nt_status) &&
            !NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED))
        {
                tmp = request->data.groupname;
        }

        /* Parse domain and groupname */

        parse_domain_user(tmp, state->name_domain, state->name_group);

        /* if no domain or our local domain and no local tdb group, default to
         * our local domain for aliases */

        if ( !*(state->name_domain) || strequal(state->name_domain,
                                                get_global_sam_name()) ) {
                fstrcpy(state->name_domain, get_global_sam_name());
        }

        subreq = wb_lookupname_send(state, ev, state->name_domain, state->name_group,
                                    0);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, winbindd_getgrnam_lookupsid_done,
                                req);
        return req;
}

static void winbindd_getgrnam_lookupsid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct winbindd_getgrnam_state *state = tevent_req_data(
                req, struct winbindd_getgrnam_state);
        enum lsa_SidType type;
        NTSTATUS status;

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

        if ( (type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) ) {
                DEBUG(5,("getgrnam_recv: not a group!\n"));
                tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
                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_getgrnam_done, req);
}

static void winbindd_getgrnam_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct winbindd_getgrnam_state *state = tevent_req_data(
                req, struct winbindd_getgrnam_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_getgrnam_recv(struct tevent_req *req,
                                struct winbindd_response *response)
{
        struct winbindd_getgrnam_state *state = tevent_req_data(
                req, struct winbindd_getgrnam_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;
}