ldb: Free memory when repacking database
[garming/samba-autobuild/.git] / source4 / cldap_server / cldap_server.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    CLDAP server task
5
6    Copyright (C) Andrew Tridgell        2005
7    
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 3 of the License, or
11    (at your option) any later version.
12    
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17    
18    You should have received a copy of the GNU General Public License
19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include <talloc.h>
24 #include "lib/messaging/irpc.h"
25 #include "smbd/service_task.h"
26 #include "smbd/service.h"
27 #include "cldap_server/cldap_server.h"
28 #include "system/network.h"
29 #include "lib/socket/netif.h"
30 #include <ldb.h>
31 #include <ldb_errors.h>
32 #include "dsdb/samdb/samdb.h"
33 #include "ldb_wrap.h"
34 #include "auth/auth.h"
35 #include "param/param.h"
36 #include "../lib/tsocket/tsocket.h"
37 #include "libds/common/roles.h"
38
39 NTSTATUS server_service_cldapd_init(TALLOC_CTX *);
40
41 /*
42   handle incoming cldap requests
43 */
44 static void cldapd_request_handler(struct cldap_socket *cldap,
45                                    void *private_data,
46                                    struct cldap_incoming *in)
47 {
48         struct cldapd_server *cldapd = talloc_get_type(private_data,
49                                        struct cldapd_server);
50         struct ldap_SearchRequest *search;
51
52         if (in->ldap_msg->type == LDAP_TAG_AbandonRequest) {
53                 DEBUG(10,("Got (and ignoring) CLDAP AbandonRequest from %s.",
54                           tsocket_address_string(in->src, in)));
55                 talloc_free(in);
56                 return;
57         }
58
59         if (in->ldap_msg->type != LDAP_TAG_SearchRequest) {
60                 DEBUG(0,("Invalid CLDAP request type %d from %s\n",
61                          in->ldap_msg->type,
62                          tsocket_address_string(in->src, in)));
63                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
64                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP request");
65                 talloc_free(in);
66                 return;
67         }
68
69         search = &in->ldap_msg->r.SearchRequest;
70
71         if (strcmp("", search->basedn) != 0) {
72                 DEBUG(0,("Invalid CLDAP basedn '%s' from %s\n",
73                          search->basedn,
74                          tsocket_address_string(in->src, in)));
75                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
76                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP basedn");
77                 talloc_free(in);
78                 return;
79         }
80
81         if (search->scope != LDAP_SEARCH_SCOPE_BASE) {
82                 DEBUG(0,("Invalid CLDAP scope %d from %s\n",
83                          search->scope,
84                          tsocket_address_string(in->src, in)));
85                 cldap_error_reply(cldap, in->ldap_msg->messageid, in->src,
86                                   LDAP_OPERATIONS_ERROR, "Invalid CLDAP scope");
87                 talloc_free(in);
88                 return;
89         }
90
91         cldapd_rootdse_request(cldap, cldapd, in,
92                                in->ldap_msg->messageid,
93                                search, in->src);
94         talloc_free(in);
95 }
96
97
98 /*
99   start listening on the given address
100 */
101 static NTSTATUS cldapd_add_socket(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
102                                   const char *address)
103 {
104         struct cldap_socket *cldapsock;
105         struct tsocket_address *socket_address;
106         NTSTATUS status;
107         int ret;
108
109         ret = tsocket_address_inet_from_strings(cldapd,
110                                                 "ip",
111                                                 address,
112                                                 lpcfg_cldap_port(lp_ctx),
113                                                 &socket_address);
114         if (ret != 0) {
115                 status = map_nt_error_from_unix_common(errno);
116                 DEBUG(0,("invalid address %s:%d - %s:%s\n",
117                          address, lpcfg_cldap_port(lp_ctx),
118                          gai_strerror(ret), nt_errstr(status)));
119                 return status;
120         }
121
122         /* listen for unicasts on the CLDAP port (389) */
123         status = cldap_socket_init(cldapd,
124                                    socket_address,
125                                    NULL,
126                                    &cldapsock);
127         if (!NT_STATUS_IS_OK(status)) {
128                 DEBUG(0,("Failed to bind to %s - %s\n", 
129                          tsocket_address_string(socket_address, socket_address),
130                          nt_errstr(status)));
131                 talloc_free(socket_address);
132                 return status;
133         }
134         talloc_free(socket_address);
135
136         cldap_set_incoming_handler(cldapsock, cldapd->task->event_ctx,
137                                    cldapd_request_handler, cldapd);
138
139         return NT_STATUS_OK;
140 }
141
142 /*
143   setup our listening sockets on the configured network interfaces
144 */
145 static NTSTATUS cldapd_startup_interfaces(struct cldapd_server *cldapd, struct loadparm_context *lp_ctx,
146                                           struct interface *ifaces)
147 {
148         int i, num_interfaces;
149         TALLOC_CTX *tmp_ctx = talloc_new(cldapd);
150         NTSTATUS status;
151
152         num_interfaces = iface_list_count(ifaces);
153
154         /* if we are allowing incoming packets from any address, then
155            we need to bind to the wildcard address */
156         if (!lpcfg_bind_interfaces_only(lp_ctx)) {
157                 size_t num_binds = 0;
158                 char **wcard = iface_list_wildcard(cldapd);
159                 NT_STATUS_HAVE_NO_MEMORY(wcard);
160                 for (i=0; wcard[i]; i++) {
161                         status = cldapd_add_socket(cldapd, lp_ctx, wcard[i]);
162                         if (NT_STATUS_IS_OK(status)) {
163                                 num_binds++;
164                         }
165                 }
166                 talloc_free(wcard);
167                 if (num_binds == 0) {
168                         return NT_STATUS_INVALID_PARAMETER_MIX;
169                 }
170         }
171
172         /* now we have to also listen on the specific interfaces,
173            so that replies always come from the right IP */
174         for (i=0; i<num_interfaces; i++) {
175                 const char *address = talloc_strdup(tmp_ctx, iface_list_n_ip(ifaces, i));
176                 status = cldapd_add_socket(cldapd, lp_ctx, address);
177                 NT_STATUS_NOT_OK_RETURN(status);
178         }
179
180         talloc_free(tmp_ctx);
181
182         return NT_STATUS_OK;
183 }
184
185 /*
186   startup the cldapd task
187 */
188 static NTSTATUS cldapd_task_init(struct task_server *task)
189 {
190         struct cldapd_server *cldapd;
191         NTSTATUS status;
192         struct interface *ifaces;
193         
194         load_interface_list(task, task->lp_ctx, &ifaces);
195
196         if (iface_list_count(ifaces) == 0) {
197                 task_server_terminate(task, "cldapd: no network interfaces configured", false);
198                 return NT_STATUS_UNSUCCESSFUL;
199         }
200
201         switch (lpcfg_server_role(task->lp_ctx)) {
202         case ROLE_STANDALONE:
203                 task_server_terminate(task, "cldap_server: no CLDAP server required in standalone configuration", 
204                                       false);
205                 return NT_STATUS_INVALID_DOMAIN_ROLE;
206         case ROLE_DOMAIN_MEMBER:
207                 task_server_terminate(task, "cldap_server: no CLDAP server required in member server configuration",
208                                       false);
209                 return NT_STATUS_INVALID_DOMAIN_ROLE;
210         case ROLE_ACTIVE_DIRECTORY_DC:
211                 /* Yes, we want an CLDAP server */
212                 break;
213         }
214
215         task_server_set_title(task, "task[cldapd]");
216
217         cldapd = talloc(task, struct cldapd_server);
218         if (cldapd == NULL) {
219                 task_server_terminate(task, "cldapd: out of memory", true);
220                 return NT_STATUS_NO_MEMORY;
221         }
222
223         cldapd->task = task;
224         cldapd->samctx = samdb_connect(cldapd,
225                                        task->event_ctx,
226                                        task->lp_ctx,
227                                        system_session(task->lp_ctx),
228                                        NULL,
229                                        0);
230         if (cldapd->samctx == NULL) {
231                 task_server_terminate(task, "cldapd failed to open samdb", true);
232                 return NT_STATUS_UNSUCCESSFUL;
233         }
234
235         /* start listening on the configured network interfaces */
236         status = cldapd_startup_interfaces(cldapd, task->lp_ctx, ifaces);
237         if (!NT_STATUS_IS_OK(status)) {
238                 task_server_terminate(task, "cldapd failed to setup interfaces", true);
239                 return status;
240         }
241
242         irpc_add_name(task->msg_ctx, "cldap_server");
243
244         return NT_STATUS_OK;
245 }
246
247
248 /*
249   register ourselves as a available server
250 */
251 NTSTATUS server_service_cldapd_init(TALLOC_CTX *ctx)
252 {
253         static const struct service_details details = {
254                 .inhibit_fork_on_accept = true,
255                 .inhibit_pre_fork = true,
256                 .task_init = cldapd_task_init,
257                 .post_fork = NULL
258         };
259         return register_server_service(ctx, "cldap", &details);
260 }