1/*
2   Unix SMB/CIFS implementation.
3   async implementation of WINBINDD_GETGRNAM
4   Copyright (C) Volker Lendecke 2009
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 3 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program.  If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include "includes.h"
21#include "winbindd.h"
22
23struct winbindd_getgrnam_state {
24	struct tevent_context *ev;
25	fstring name_domain, name_group;
26	struct dom_sid sid;
27	const char *domname;
28	const char *name;
29	gid_t gid;
30	struct talloc_dict *members;
31};
32
33static void winbindd_getgrnam_lookupsid_done(struct tevent_req *subreq);
34static void winbindd_getgrnam_done(struct tevent_req *subreq);
35
36struct tevent_req *winbindd_getgrnam_send(TALLOC_CTX *mem_ctx,
37					  struct tevent_context *ev,
38					  struct winbindd_cli_state *cli,
39					  struct winbindd_request *request)
40{
41	struct tevent_req *req, *subreq;
42	struct winbindd_getgrnam_state *state;
43	char *tmp;
44	NTSTATUS nt_status;
45
46	req = tevent_req_create(mem_ctx, &state,
47				struct winbindd_getgrnam_state);
48	if (req == NULL) {
49		return NULL;
50	}
51	state->ev = ev;
52
53	/* Ensure null termination */
54	request->data.groupname[sizeof(request->data.groupname)-1]='\0';
55
56	DEBUG(3, ("getgrnam %s\n", request->data.groupname));
57
58	nt_status = normalize_name_unmap(state, request->data.groupname, &tmp);
59	/* If we didn't map anything in the above call, just reset the
60	   tmp pointer to the original string */
61	if (!NT_STATUS_IS_OK(nt_status) &&
62	    !NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED))
63	{
64		tmp = request->data.groupname;
65	}
66
67	/* Parse domain and groupname */
68
69	parse_domain_user(tmp, state->name_domain, state->name_group);
70
71	/* if no domain or our local domain and no local tdb group, default to
72	 * our local domain for aliases */
73
74	if ( !*(state->name_domain) || strequal(state->name_domain,
75						get_global_sam_name()) ) {
76		fstrcpy(state->name_domain, get_global_sam_name());
77	}
78
79	subreq = wb_lookupname_send(state, ev, state->name_domain, state->name_group,
80				    0);
81	if (tevent_req_nomem(subreq, req)) {
82		return tevent_req_post(req, ev);
83	}
84	tevent_req_set_callback(subreq, winbindd_getgrnam_lookupsid_done,
85				req);
86	return req;
87}
88
89static void winbindd_getgrnam_lookupsid_done(struct tevent_req *subreq)
90{
91	struct tevent_req *req = tevent_req_callback_data(
92		subreq, struct tevent_req);
93	struct winbindd_getgrnam_state *state = tevent_req_data(
94		req, struct winbindd_getgrnam_state);
95	enum lsa_SidType type;
96	NTSTATUS status;
97
98	status = wb_lookupname_recv(subreq, &state->sid, &type);
99	TALLOC_FREE(subreq);
100	if (!NT_STATUS_IS_OK(status)) {
101		tevent_req_nterror(req, status);
102		return;
103	}
104
105	if ( (type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) ) {
106		DEBUG(5,("getgrnam_recv: not a group!\n"));
107		tevent_req_nterror(req, NT_STATUS_NO_SUCH_GROUP);
108		return;
109	}
110
111	subreq = wb_getgrsid_send(state, state->ev, &state->sid,
112				  lp_winbind_expand_groups());
113	if (tevent_req_nomem(subreq, req)) {
114		return;
115	}
116	tevent_req_set_callback(subreq, winbindd_getgrnam_done, req);
117}
118
119static void winbindd_getgrnam_done(struct tevent_req *subreq)
120{
121	struct tevent_req *req = tevent_req_callback_data(
122		subreq, struct tevent_req);
123	struct winbindd_getgrnam_state *state = tevent_req_data(
124		req, struct winbindd_getgrnam_state);
125	NTSTATUS status;
126
127	status = wb_getgrsid_recv(subreq, state, &state->domname, &state->name,
128				  &state->gid, &state->members);
129	TALLOC_FREE(subreq);
130	if (!NT_STATUS_IS_OK(status)) {
131		tevent_req_nterror(req, status);
132		return;
133	}
134	tevent_req_done(req);
135}
136
137NTSTATUS winbindd_getgrnam_recv(struct tevent_req *req,
138				struct winbindd_response *response)
139{
140	struct winbindd_getgrnam_state *state = tevent_req_data(
141		req, struct winbindd_getgrnam_state);
142	NTSTATUS status;
143	int num_members;
144	char *buf;
145
146	if (tevent_req_is_nterror(req, &status)) {
147		DEBUG(5, ("Could not convert sid %s: %s\n",
148			  sid_string_dbg(&state->sid), nt_errstr(status)));
149		return status;
150	}
151
152	if (!fill_grent(talloc_tos(), &response->data.gr, state->domname,
153			state->name, state->gid)) {
154		DEBUG(5, ("fill_grent failed\n"));
155		return NT_STATUS_NO_MEMORY;
156	}
157
158	status = winbindd_print_groupmembers(state->members, response,
159					     &num_members, &buf);
160	if (!NT_STATUS_IS_OK(status)) {
161		return status;
162	}
163
164	response->data.gr.num_gr_mem = (uint32)num_members;
165
166	/* Group membership lives at start of extra data */
167
168	response->data.gr.gr_mem_ofs = 0;
169	response->extra_data.data = buf;
170	response->length += talloc_get_size(response->extra_data.data);
171
172	return NT_STATUS_OK;
173}
174