s3:winbind: Convert the getgrent functions to the new API

1 files changed, 203 insertions, 0 deletions

diff --git a/source3/winbindd/winbindd_getgrent.c b/source3/winbindd/winbindd_getgrent.c
new file mode 100644
index 0000000000..a3ea8dd0df
--- /dev/null
+++ b/source3/winbindd/winbindd_getgrent.c
@@ -0,0 +1,203 @@
+/*
+   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;
+}
+
+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)) {
+		DEBUG(10, ("winbindd_getgrent_done: done with %d groups\n",
+			   (int)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) {
+		DEBUG(10, ("winbindd_getgrent_done: Got enough groups: %d\n",
+			   (int)state->num_groups));
+		tevent_req_done(req);
+		return;
+	}
+	if (state->cli->grent_state == NULL) {
+		DEBUG(10, ("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;
+	int i;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		DEBUG(5, ("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) {
+		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);
+			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) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	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);
+	return NT_STATUS_OK;
+}