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/*
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;
uint32_t max_groups;
uint32_t num_groups;
struct winbindd_gr *groups;
struct db_context **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;
D_NOTICE("[%s (%u)] Winbind external command GETGRENT start.\n"
"The caller (%s) provided room for %"PRIu32" entries.\n",
cli->client_name,
(unsigned int)cli->pid,
cli->client_name,
request->data.num_entries);
if (cli->grent_state == NULL) {
D_NOTICE("The grent state from winbindd client state is NULL.\n");
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 db_context *,
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;
}
static void winbindd_getgrent_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct winbindd_getgrent_state *state = tevent_req_data(
req, struct winbindd_getgrent_state);
NTSTATUS status;
status = wb_next_grent_recv(subreq, state,
&state->members[state->num_groups]);
TALLOC_FREE(subreq);
if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MORE_ENTRIES)) {
D_WARNING("winbindd_getgrent_done: done with %"PRIu32" groups\n",
state->num_groups);
TALLOC_FREE(state->cli->grent_state);
tevent_req_done(req);
return;
}
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
state->num_groups += 1;
if (state->num_groups >= state->max_groups) {
D_DEBUG("winbindd_getgrent_done: Got enough groups: %"PRIu32"\n",
state->num_groups);
tevent_req_done(req);
return;
}
if (state->cli->grent_state == NULL) {
D_DEBUG("winbindd_getgrent_done: endgrent called in between\n");
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return;
}
subreq = wb_next_grent_send(state, state->ev,
lp_winbind_expand_groups(),
state->cli->grent_state,
&state->groups[state->num_groups]);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, winbindd_getgrent_done, req);
}
NTSTATUS winbindd_getgrent_recv(struct tevent_req *req,
struct winbindd_response *response)
{
struct winbindd_getgrent_state *state = tevent_req_data(
req, struct winbindd_getgrent_state);
NTSTATUS status;
char **memberstrings;
char *result;
size_t base_memberofs, total_memberlen;
uint32_t i;
if (tevent_req_is_nterror(req, &status)) {
TALLOC_FREE(state->cli->grent_state);
D_WARNING("getgrent failed: %s\n", nt_errstr(status));
return status;
}
if (state->num_groups == 0) {
return NT_STATUS_NO_MORE_ENTRIES;
}
memberstrings = talloc_array(talloc_tos(), char *, state->num_groups);
if (memberstrings == NULL) {
TALLOC_FREE(state->cli->grent_state);
return NT_STATUS_NO_MEMORY;
}
total_memberlen = 0;
for (i=0; i<state->num_groups; i++) {
int num_members;
status = winbindd_print_groupmembers(
state->members[i], memberstrings, &num_members,
&memberstrings[i]);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(memberstrings);
TALLOC_FREE(state->cli->grent_state);
return status;
}
TALLOC_FREE(state->members[i]);
state->groups[i].num_gr_mem = num_members;
state->groups[i].gr_mem_ofs = total_memberlen;
total_memberlen += talloc_get_size(memberstrings[i]);
}
base_memberofs = state->num_groups * sizeof(struct winbindd_gr);
result = talloc_realloc(state, state->groups, char,
base_memberofs + total_memberlen);
if (result == NULL) {
TALLOC_FREE(state->cli->grent_state);
return NT_STATUS_NO_MEMORY;
}
state->groups = (struct winbindd_gr *)result;
for (i=0; i<state->num_groups; i++) {
memcpy(result + base_memberofs + state->groups[i].gr_mem_ofs,
memberstrings[i], talloc_get_size(memberstrings[i]));
TALLOC_FREE(memberstrings[i]);
}
TALLOC_FREE(memberstrings);
response->data.num_entries = state->num_groups;
response->length += talloc_get_size(result);
response->extra_data.data = talloc_move(response, &result);
D_NOTICE("Winbind external command GETGRENT end.\n"
"Received %"PRIu32" entries.\n",
response->data.num_entries);
return NT_STATUS_OK;
}
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