source: vendor/3.6.23/source3/rpc_server/epmd.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 7.0 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 *
4 * SMBD RPC service callbacks
5 *
6 * Copyright (c) 2011 Andreas Schneider <asn@samba.org>
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
24#include "serverid.h"
25#include "ntdomain.h"
26#include "../librpc/gen_ndr/srv_epmapper.h"
27#include "rpc_server/rpc_server.h"
28#include "rpc_server/epmapper/srv_epmapper.h"
29#include "messages.h"
30
31#define DAEMON_NAME "epmd"
32
33void start_epmd(struct tevent_context *ev_ctx,
34 struct messaging_context *msg_ctx);
35
36static bool epmd_open_sockets(struct tevent_context *ev_ctx,
37 struct messaging_context *msg_ctx)
38{
39 uint32_t num_ifs = iface_count();
40 uint16_t port;
41 uint32_t i;
42
43 if (lp_interfaces() && lp_bind_interfaces_only()) {
44 /*
45 * We have been given an interfaces line, and been told to only
46 * bind to those interfaces. Create a socket per interface and
47 * bind to only these.
48 */
49
50 /* Now open a listen socket for each of the interfaces. */
51 for(i = 0; i < num_ifs; i++) {
52 const struct sockaddr_storage *ifss =
53 iface_n_sockaddr_storage(i);
54
55 port = setup_dcerpc_ncacn_tcpip_socket(ev_ctx,
56 msg_ctx,
57 ndr_table_epmapper.syntax_id,
58 ifss,
59 135);
60 if (port == 0) {
61 return false;
62 }
63 }
64 } else {
65 const char *sock_addr = lp_socket_address();
66 const char *sock_ptr;
67 char *sock_tok;
68
69 if (strequal(sock_addr, "0.0.0.0") ||
70 strequal(sock_addr, "::")) {
71#if HAVE_IPV6
72 sock_addr = "::";
73#else
74 sock_addr = "0.0.0.0";
75#endif
76 }
77
78 for (sock_ptr = sock_addr;
79 next_token_talloc(talloc_tos(), &sock_ptr, &sock_tok, " \t,");
80 ) {
81 struct sockaddr_storage ss;
82
83 /* open an incoming socket */
84 if (!interpret_string_addr(&ss,
85 sock_tok,
86 AI_NUMERICHOST|AI_PASSIVE)) {
87 continue;
88 }
89
90 port = setup_dcerpc_ncacn_tcpip_socket(ev_ctx,
91 msg_ctx,
92 ndr_table_epmapper.syntax_id,
93 &ss,
94 135);
95 if (port == 0) {
96 return false;
97 }
98 }
99 }
100
101 return true;
102}
103
104static void epmd_reopen_logs(void)
105{
106 char *lfile = lp_logfile();
107 int rc;
108
109 if (lfile == NULL || lfile[0] == '\0') {
110 rc = asprintf(&lfile, "%s/log.%s", get_dyn_LOGFILEBASE(), DAEMON_NAME);
111 if (rc > 0) {
112 lp_set_logfile(lfile);
113 SAFE_FREE(lfile);
114 }
115 } else {
116 if (strstr(lfile, DAEMON_NAME) == NULL) {
117 rc = asprintf(&lfile, "%s.%s", lp_logfile(), DAEMON_NAME);
118 if (rc > 0) {
119 lp_set_logfile(lfile);
120 SAFE_FREE(lfile);
121 }
122 }
123 }
124
125 reopen_logs();
126}
127
128static void epmd_smb_conf_updated(struct messaging_context *msg,
129 void *private_data,
130 uint32_t msg_type,
131 struct server_id server_id,
132 DATA_BLOB *data)
133{
134 DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
135 change_to_root_user();
136 epmd_reopen_logs();
137}
138
139static void epmd_sig_term_handler(struct tevent_context *ev,
140 struct tevent_signal *se,
141 int signum,
142 int count,
143 void *siginfo,
144 void *private_data)
145{
146 rpc_epmapper_shutdown();
147
148 exit_server_cleanly("termination signal");
149}
150
151static void epmd_setup_sig_term_handler(struct tevent_context *ev_ctx)
152{
153 struct tevent_signal *se;
154
155 se = tevent_add_signal(ev_ctx,
156 ev_ctx,
157 SIGTERM, 0,
158 epmd_sig_term_handler,
159 NULL);
160 if (se == NULL) {
161 exit_server("failed to setup SIGTERM handler");
162 }
163}
164
165static void epmd_sig_hup_handler(struct tevent_context *ev,
166 struct tevent_signal *se,
167 int signum,
168 int count,
169 void *siginfo,
170 void *private_data)
171{
172 change_to_root_user();
173
174 DEBUG(1,("Reloading printers after SIGHUP\n"));
175 epmd_reopen_logs();
176}
177
178static void epmd_setup_sig_hup_handler(struct tevent_context *ev_ctx,
179 struct messaging_context *msg_ctx)
180{
181 struct tevent_signal *se;
182
183 se = tevent_add_signal(ev_ctx,
184 ev_ctx,
185 SIGHUP, 0,
186 epmd_sig_hup_handler,
187 msg_ctx);
188 if (se == NULL) {
189 exit_server("failed to setup SIGHUP handler");
190 }
191}
192
193static bool epmapper_shutdown_cb(void *ptr) {
194 srv_epmapper_cleanup();
195
196 return true;
197}
198
199void start_epmd(struct tevent_context *ev_ctx,
200 struct messaging_context *msg_ctx)
201{
202 struct rpc_srv_callbacks epmapper_cb;
203 NTSTATUS status;
204 pid_t pid;
205 bool ok;
206 int rc;
207
208 epmapper_cb.init = NULL;
209 epmapper_cb.shutdown = epmapper_shutdown_cb;
210 epmapper_cb.private_data = NULL;
211
212 DEBUG(1, ("Forking Endpoint Mapper Daemon\n"));
213
214 pid = sys_fork();
215
216 if (pid == -1) {
217 DEBUG(0, ("Failed to fork Endpoint Mapper [%s], aborting ...\n",
218 strerror(errno)));
219 exit(1);
220 }
221
222 if (pid) {
223 /* parent */
224 return;
225 }
226
227 /* child */
228 close_low_fds(false);
229
230 status = reinit_after_fork(msg_ctx,
231 ev_ctx,
232 procid_self(),
233 true);
234 if (!NT_STATUS_IS_OK(status)) {
235 DEBUG(0,("reinit_after_fork() failed\n"));
236 smb_panic("reinit_after_fork() failed");
237 }
238
239 epmd_reopen_logs();
240
241 epmd_setup_sig_term_handler(ev_ctx);
242 epmd_setup_sig_hup_handler(ev_ctx, msg_ctx);
243
244 ok = serverid_register(procid_self(),
245 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
246 |FLAG_MSG_PRINT_GENERAL);
247 if (!ok) {
248 DEBUG(0, ("Failed to register serverid in epmd!\n"));
249 exit(1);
250 }
251
252 messaging_register(msg_ctx,
253 ev_ctx,
254 MSG_SMB_CONF_UPDATED,
255 epmd_smb_conf_updated);
256
257 status = rpc_epmapper_init(&epmapper_cb);
258 if (!NT_STATUS_IS_OK(status)) {
259 DEBUG(0, ("Failed to register epmd rpc inteface! (%s)\n",
260 nt_errstr(status)));
261 exit(1);
262 }
263
264 ok = setup_dcerpc_ncalrpc_socket(ev_ctx,
265 msg_ctx,
266 ndr_table_epmapper.syntax_id,
267 "EPMAPPER",
268 srv_epmapper_delete_endpoints);
269 if (!ok) {
270 DEBUG(0, ("Failed to open epmd ncalrpc pipe!\n"));
271 exit(1);
272 }
273
274 ok = epmd_open_sockets(ev_ctx, msg_ctx);
275 if (!ok) {
276 DEBUG(0, ("Failed to open epmd tcpip sockets!\n"));
277 exit(1);
278 }
279
280 ok = setup_named_pipe_socket("epmapper", ev_ctx);
281 if (!ok) {
282 DEBUG(0, ("Failed to open epmd named pipe!\n"));
283 exit(1);
284 }
285
286 DEBUG(1, ("Endpoint Mapper Daemon Started (%d)\n", getpid()));
287
288 /* loop forever */
289 rc = tevent_loop_wait(ev_ctx);
290
291 /* should not be reached */
292 DEBUG(0,("background_queue: tevent_loop_wait() exited with %d - %s\n",
293 rc, (rc == 0) ? "out of events" : strerror(errno)));
294
295 exit(1);
296}
297
298/* vim: set ts=8 sw=8 noet cindent ft=c.doxygen: */
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