1 /*
2 * Samba Unix/Linux SMB client library
3 *
4 * Copyright (C) Gregor Beck 2011
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 /**
21 * @brief Notify smbd about idmap changes
22 * @file msg_idmap.c
23 * @author Gregor Beck <gb@sernet.de>
24 * @date Feb 2011
25 *
26 */
27
28 #include "includes.h"
29 #include "messages.h"
30 #include "lib/id_cache.h"
31 #include "../lib/util/memcache.h"
32 #include "idmap_cache.h"
33 #include "../librpc/gen_ndr/ndr_security.h"
34 #include "../libcli/security/dom_sid.h"
35
id_cache_ref_parse(const char * str,struct id_cache_ref * id)36 bool id_cache_ref_parse(const char* str, struct id_cache_ref* id)
37 {
38 struct dom_sid sid;
39 unsigned long ul;
40 char c, trash;
41
42 if (sscanf(str, "%cID %lu%c", &c, &ul, &trash) == 2) {
43 switch(c) {
44 case 'G':
45 id->id.gid = ul;
46 id->type = GID;
47 return true;
48 case 'U':
49 id->id.uid = ul;
50 id->type = UID;
51 return true;
52 default:
53 break;
54 }
55 } else if (string_to_sid(&sid, str)) {
56 id->id.sid = sid;
57 id->type = SID;
58 return true;
59 } else if (strncmp(str, "USER ", 5) == 0) {
60 id->id.name = str + 5;
61 id->type = USERNAME;
62 return true;
63 }
64 return false;
65 }
66
delete_getpwnam_cache(const char * username)67 static bool delete_getpwnam_cache(const char *username)
68 {
69 DATA_BLOB name = data_blob_string_const_null(username);
70 DEBUG(6, ("Delete passwd struct for %s from memcache\n",
71 username));
72 memcache_delete(NULL, GETPWNAM_CACHE, name);
73 return true;
74 }
75
id_cache_delete_from_cache(const struct id_cache_ref * id)76 void id_cache_delete_from_cache(const struct id_cache_ref* id)
77 {
78 switch(id->type) {
79 case UID:
80 idmap_cache_del_uid(id->id.uid);
81 break;
82 case GID:
83 idmap_cache_del_gid(id->id.gid);
84 break;
85 case SID:
86 idmap_cache_del_sid(&id->id.sid);
87 break;
88 case USERNAME:
89 delete_getpwnam_cache(id->id.name);
90 default:
91 break;
92 }
93 }
94
id_cache_delete_message(struct messaging_context * msg_ctx,void * private_data,uint32_t msg_type,struct server_id server_id,DATA_BLOB * data)95 void id_cache_delete_message(struct messaging_context *msg_ctx,
96 void *private_data,
97 uint32_t msg_type,
98 struct server_id server_id,
99 DATA_BLOB* data)
100 {
101 const char *msg = (data && data->data) ? (const char *)data->data : "<NULL>";
102 struct id_cache_ref id;
103
104 if (!id_cache_ref_parse(msg, &id)) {
105 DEBUG(0, ("Invalid ?ID: %s\n", msg));
106 return;
107 }
108
109 id_cache_delete_from_cache(&id);
110 }
111
id_cache_register_msgs(struct messaging_context * ctx)112 void id_cache_register_msgs(struct messaging_context *ctx)
113 {
114 messaging_register(ctx, NULL, ID_CACHE_DELETE, id_cache_delete_message);
115 }
116